WO2025145809A1 - Acceleration performance test method for vehicle chassis and acceleration performance test method for vehicle - Google Patents

Abstract

An acceleration performance test method for a vehicle chassis. The acceleration performance test method for a vehicle chassis comprises: controlling a vehicle chassis (2) to perform accelerated motion at least in each of a first test environment and a second test environment, and at least respectively acquiring a first acceleration performance of the vehicle chassis (2) in the first test environment and a second acceleration performance of the vehicle chassis (2) in the second test environment (S21); and acquiring an overall acceleration performance of the vehicle chassis (2) at least on the basis of the first acceleration performance and the second acceleration performance, wherein the first test environment comprises one of a road of travel, a chassis test platform and a whole-vehicle test platform, and the second test environment comprises the other one of the road of travel, the chassis test platform and the whole-vehicle test platform (S22). In this way, the acceleration performance of a vehicle chassis can be tested, the reliability of the vehicle chassis and a vehicle is improved, and the test period of the acceleration performance of the vehicle can also be shortened. The present application further relates to an acceleration performance test method for a vehicle.

Description

Vehicle chassis acceleration performance test method and vehicle acceleration performance test method

This application claims priority to Chinese patent application No. 2024100121160, filed on January 3, 2024, entitled “Acceleration performance testing method for vehicle chassis and acceleration performance testing method for vehicle”, which is incorporated herein by reference in its entirety.

[Technical field]

The present application relates to the field of vehicle technology, and in particular to a method for testing the acceleration performance of a vehicle chassis and a method for testing the acceleration performance of a vehicle.

[Background technology]

Acceleration performance is a critical performance of the vehicle, which not only affects the vehicle's user experience, but also affects driving safety, etc. The vehicle chassis is an indispensable independent product of the vehicle, and its product performance has a great impact on the overall performance of the vehicle.

In order to evaluate the acceleration performance of a vehicle, the relevant technology conducts acceleration performance tests at the vehicle level, but does not implement acceleration performance tests of the vehicle chassis. Acceleration performance tests at the vehicle level not only result in a longer test cycle for the vehicle's acceleration performance, but also result in the problem that the acceleration performance of the vehicle chassis cannot be accurately verified when it is delivered as an independent product.

[Summary of the invention]

In view of the above problems, the present application provides a method for testing the acceleration performance of a vehicle chassis to achieve the test of the acceleration performance of the vehicle chassis, thereby improving the reliability of the vehicle chassis and the vehicle, and it can also shorten the test cycle of the vehicle's acceleration performance.

In the first aspect, the present application provides an acceleration performance test of a vehicle chassis. The acceleration performance test method includes: controlling the vehicle chassis to perform acceleration motion at least under a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment; obtaining the overall acceleration performance of the vehicle chassis based at least on the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of a driving road, a chassis test platform, and a vehicle test platform, and the second test environment includes another of a driving road, a chassis test platform, and a vehicle test platform. The present application can realize a separate test of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is delivered as an independent product, its acceleration performance is accurately verified; and the present application is based on the overall acceleration performance of the vehicle chassis obtained by combining the first acceleration performance of the vehicle chassis at least under the first test environment and the second acceleration performance under the second test environment, and can comprehensively consider the acceleration performance under multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis, thereby improving its reliability.

In some embodiments, the above-mentioned control of the vehicle chassis to perform acceleration movement at least in the first test environment and the second test environment, and obtaining at least the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance of the vehicle chassis in the second test environment, respectively, includes: controlling the vehicle chassis to perform acceleration movement on the driving road, and obtaining the first acceleration performance of the vehicle chassis; controlling the vehicle chassis to perform acceleration movement on the chassis test platform, and obtaining the second acceleration performance of the vehicle chassis; controlling the vehicle chassis to perform acceleration movement on the whole vehicle test platform, and obtaining the third acceleration performance of the vehicle chassis; the above-mentioned obtaining the overall acceleration performance of the vehicle chassis based on at least the first acceleration performance and the second acceleration performance, includes: obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance. This embodiment obtains the acceleration performance of the vehicle chassis in three different test environments respectively, and obtains the overall acceleration performance of the vehicle chassis based on the acceleration performance in the three test environments. Therefore, the overall acceleration performance not only considers the first acceleration performance of the vehicle chassis on the actual driving road, but also considers the second acceleration performance of the vehicle chassis in the experimental environment and the third acceleration performance of the whole vehicle in the experimental environment, which can improve the test accuracy of the acceleration performance of the vehicle chassis and the vehicle.

In some embodiments, the first acceleration performance includes a first acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a driving road; the second acceleration performance includes a second acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a chassis test platform; and the third acceleration performance includes a third acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a vehicle test platform. This embodiment characterizes the acceleration performance of the vehicle chassis by the acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed, which is simple and easy to implement, has high accuracy, and makes the evaluation and definition of acceleration performance more intuitive; and this embodiment uses the same parameters to characterize the acceleration performance under different test environments, which can simplify the calculation and improve the measurement accuracy of the acceleration performance of the vehicle chassis.

In some embodiments, the above-mentioned obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance includes: calculating the average of the first acceleration duration, the second acceleration duration and the third acceleration duration as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed. Calculating the average of the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis can improve the test accuracy of the vehicle chassis acceleration performance.

In some embodiments, the above-mentioned method of obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance also includes: respectively obtaining the first difference between the first acceleration duration and the second acceleration duration, the second difference between the second acceleration duration and the third acceleration duration, and the third difference between the third acceleration duration and the first acceleration duration; in response to the first difference, the second difference and the third difference being less than or equal to the difference threshold, the average of the first acceleration duration, the second acceleration duration and the third acceleration duration is calculated as the acceleration duration of the vehicle chassis from a preset starting speed to a preset ending speed. If it is determined that the difference between the acceleration durations of the vehicle chassis from a preset starting speed to a preset ending speed under any two test environments is less than or equal to the difference threshold, that is, the acceleration durations measured by the vehicle chassis under multiple test environments have a small deviation, then the upper computer calculates the average of the acceleration durations of the vehicle chassis from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the acceleration performance of the vehicle chassis.

In some embodiments, the above-mentioned acquisition of the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance also includes: in response to one of the first difference, the second difference and the third difference being less than or equal to the difference threshold, and the other two being greater than the difference threshold, the average of the two acceleration durations corresponding to the difference less than the difference threshold is used as the acceleration duration of the vehicle chassis from a preset starting speed to a preset ending speed. If one of the first difference, the second difference and the third difference is less than or equal to the difference threshold, and the other two are greater than the difference threshold, it can be considered that the test error of one of the test environments is large, and the corresponding test data is abandoned. The host computer calculates the average of the other two acceleration durations with smaller deviations as the acceleration duration of the vehicle chassis from a preset starting speed to a preset ending speed. In this way, the test data with large test errors can be automatically eliminated, thereby improving the test accuracy of the vehicle chassis.

In some embodiments, the above-mentioned control of the vehicle chassis to perform acceleration movement at least in the first test environment and the second test environment, and obtaining at least the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment, respectively, includes: controlling the vehicle chassis to perform multiple acceleration movements on the driving road with multiple sets of different preset starting speeds and ending speeds, and obtaining the first acceleration duration of the vehicle chassis for each acceleration movement; controlling the vehicle chassis to perform multiple acceleration movements on the chassis test platform with multiple sets of different preset starting speeds and ending speeds, and obtaining the second acceleration duration of the vehicle chassis for each acceleration movement; controlling the vehicle chassis to perform multiple acceleration movements on the whole vehicle test platform with multiple sets of different preset starting speeds and ending speeds, and obtaining the third acceleration duration of the vehicle chassis for each acceleration movement. This embodiment obtains the acceleration performance of the vehicle chassis under multiple acceleration conditions in each test environment, which can enrich the acceleration performance evaluation and parameter index definition of the vehicle chassis and the vehicle.

In some embodiments, the above-mentioned controlling the vehicle chassis to perform accelerated motion on the chassis test platform and obtaining the second acceleration performance of the vehicle chassis includes: obtaining a device loading curve; determining the resistance value of the vehicle chassis on the chassis test platform based on the device loading curve; and controlling the vehicle chassis to perform accelerated motion on the chassis test platform against the corresponding resistance value. This embodiment further sets the resistance between the vehicle chassis and the chassis test platform based on the device loading curve of the vehicle chassis, so as to simulate the accelerated motion of the vehicle chassis on an actual driving road, so that the accelerated motion of the vehicle chassis on the chassis test platform is more consistent with the accelerated motion on an actual driving road, thereby improving the accuracy of the vehicle chassis acceleration performance test.

In the second aspect, the present application provides an acceleration performance test for a vehicle. The acceleration performance test method includes: obtaining the overall acceleration performance of the vehicle chassis of the vehicle using the above-mentioned acceleration performance test method; obtaining the whole vehicle acceleration performance of the vehicle based on the overall acceleration performance, the first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle upper body. In this embodiment, the acceleration performance of the vehicle chassis is first tested separately, and then the whole vehicle acceleration performance of the vehicle is obtained based on the acceleration performance and the first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle upper body. There is no need to perform an acceleration performance test on the whole vehicle, which can improve the definition of vehicle and component parameter indicators at different levels in the whole vehicle development process, and can shorten the test cycle of the OEM in the whole vehicle development process, simplify the process and reduce the result burden.

In some embodiments, the first attribute parameter includes a first test mass of the vehicle chassis, a first frontal area of the vehicle chassis, a tire rolling resistance coefficient of the vehicle chassis, and a first wind resistance coefficient of the vehicle chassis; the second attribute parameter includes a second test mass of the upper vehicle body, a second frontal area of the upper vehicle body, and a second wind resistance coefficient of the upper vehicle body. This embodiment uses the test mass, the frontal area of the vehicle, the tire rolling resistance coefficient, and the first wind resistance coefficient as relevant parameters for obtaining acceleration performance, which can improve the test accuracy of the vehicle's acceleration performance.

In some embodiments, the acceleration performance includes the acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed; the above-mentioned acquisition of the vehicle acceleration performance based on the acceleration performance, the first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle upper body includes: respectively acquiring the fourth difference between the second test mass and the first test mass, the fifth difference between the second drag coefficient and the first drag coefficient, and the sixth difference between the second frontal area and the first frontal area; acquiring the product of the acceleration time, the fourth difference, the fifth difference, the sixth difference, and the tire rolling resistance coefficient; acquiring the sum of the percentage of the product and the acceleration time as the vehicle acceleration time. This embodiment can acquire the vehicle acceleration time of the vehicle through the above-mentioned preset relationship, and because the vehicle acceleration performance takes into account the acceleration time of the vehicle chassis, the attribute parameters of the vehicle chassis and the attribute parameters of the upper body, it can improve the test accuracy of the vehicle acceleration time.

In some embodiments, the acceleration performance test method further includes: defining a parameter index of the vehicle based on the acceleration performance of the whole vehicle and the overall acceleration performance of the vehicle chassis. This embodiment can define the parameter index of the vehicle based on the acceleration performance of the whole vehicle and the overall acceleration performance of the vehicle chassis, and can improve the definition of vehicle and component parameter indexes at different levels in the whole vehicle development process.

Different from the prior art: the acceleration performance test method of the vehicle chassis provided by the present application first controls the vehicle chassis to perform acceleration motion at least under the first test environment and the second test environment, and obtains at least the first acceleration performance of the vehicle chassis under the first test environment and the second acceleration performance under the second test environment; then obtains the overall acceleration performance of the vehicle chassis based on at least the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of the driving road, the chassis test platform, and the whole vehicle test platform, and the second test environment includes the other of the driving road, the chassis test platform, and the whole vehicle test platform. In this way, the present application can realize the separate test of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is delivered as an independent product, its acceleration performance is accurately verified; and the present application is based on the overall acceleration performance of the vehicle chassis obtained by combining the first acceleration performance of the vehicle chassis at least under the first test environment and the second acceleration performance under the second test environment, and can comprehensively consider the acceleration performance under multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis, thereby improving its reliability.

【Brief Description of the Drawings】

Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

FIG1 is a schematic diagram of the structure of some embodiments of the vehicle of the present application;

FIG2 is a schematic flow chart of some embodiments of the acceleration performance test method of the vehicle chassis of the present application;

FIG3 is a flow chart of other embodiments of the acceleration performance test method of the vehicle chassis of the present application;

FIG4 is a schematic diagram of a specific flow chart of step S34 in the embodiment of FIG3 ;

FIG5 is another specific schematic diagram of the process of step S34 in the embodiment of FIG3 ;

FIG6 is a schematic diagram of a specific flow chart of step S32 in the embodiment of FIG3 ;

FIG. 7 is a flow chart of some embodiments of the vehicle acceleration performance test method of the present application;

FIG. 8 is a schematic diagram of a specific flow chart of step S72 in the embodiment of FIG. 7 .

The reference numerals in the specific implementation manner are as follows:
Vehicle 1000a; battery 100a; controller 200a; motor 300a; upper vehicle body 1; vehicle chassis 2.

[Specific implementation method]

The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

A vehicle usually consists of four major parts: engine, upper body, vehicle chassis and electrical equipment; among them, the engine is the power unit of the vehicle; the function of the vehicle chassis is to support and install the assembly of the engine and other components to form the vehicle shape of the car, and to receive the power of the engine to make the vehicle move and ensure normal driving; the vehicle chassis consists of four parts: transmission system, running system, steering system and braking system; the electrical equipment consists of two major parts: power supply and electrical equipment; the upper body is installed on the vehicle chassis for the driver and passengers to ride or load cargo.

As an indispensable independent product of a vehicle, the performance of the vehicle chassis has a great impact on the overall performance of the vehicle.

In order to evaluate the acceleration performance of a vehicle, the related technology only conducts acceleration performance tests at the vehicle level, that is, it is necessary to test the upper body and the vehicle chassis together, and does not consider and implement the acceleration performance test of the vehicle chassis. The acceleration performance test at the vehicle level will not only lead to a longer test cycle for the vehicle's acceleration performance, but also lead to the problem that the acceleration performance of the vehicle chassis cannot be accurately verified when it is delivered as an independent product, and its reliability is not high. Moreover, in the related technology, the test method for the acceleration performance test at the vehicle level is simple, resulting in low test accuracy for the vehicle chassis and the acceleration performance of the vehicle.

In the development process of vehicle chassis, especially integrated intelligent chassis, in order to adapt to more upper bodies and components, it is necessary to define the performance attribute indicators of the vehicle chassis in the early stage of development. Therefore, the acceleration performance test of the vehicle chassis is very important. The technical solution provided in this application can realize the acceleration performance test of the vehicle chassis, so that the acceleration performance of the whole vehicle can be combined with the upper body for reference and verification.

Based on the above considerations, the acceleration performance test method of the vehicle chassis provided by the present application first controls the vehicle chassis to perform acceleration motion at least under the first test environment and the second test environment, and obtains at least the first acceleration performance of the vehicle chassis under the first test environment and the second acceleration performance under the second test environment; then obtains the overall acceleration performance of the vehicle chassis based on at least the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of the driving road, the chassis test platform, and the whole vehicle test platform, and the second test environment includes the other of the driving road, the chassis test platform, and the whole vehicle test platform. In this way, the present application can realize the separate test of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is delivered as an independent product, its acceleration performance is accurately verified; and the present application is based on the overall acceleration performance of the vehicle chassis obtained by combining the first acceleration performance of the vehicle chassis at least under the first test environment and the second acceleration performance under the second test environment, and can comprehensively consider the acceleration performance under multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis, thereby improving its reliability.

The acceleration performance test method of the vehicle chassis and the acceleration performance test method of the vehicle disclosed in the embodiments of the present application can be used for fuel vehicles, gas vehicles or new energy vehicles. The new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.

In some embodiments, as shown in FIG1 , a vehicle 1000a includes an upper body 1, a vehicle chassis 2, a controller 200a, and a motor 300a, and a battery 100a is also provided on the vehicle chassis 2. The battery 100a can be used to power the vehicle 1000a, for example, the battery 100a can be used as an operating power source for the vehicle 1000a. The controller 200a is used to control the battery 100a to power the motor 300a, for example, to meet the power requirements of the vehicle 1000a when starting, navigating, and driving.

The integrated chassis technology of electric vehicles, namely CTC (Cell to Chassis), is a battery technology that directly integrates the electrode assembly of the battery 100a into the interior of the vehicle chassis 2. It can reduce the footprint of the vehicle 1000a and the vehicle chassis 2 and reduce manufacturing costs, and can also increase the volume energy density of the battery 100a and load more batteries 100a.

Of course, the vehicle chassis provided in this application may be a CTC vehicle chassis or other vehicle chassis.

In some embodiments, as shown in FIG. 2 , the acceleration performance test method of the vehicle chassis specifically includes the following steps:

Step S21: Controlling the vehicle chassis to perform acceleration motion at least in a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis in the first test environment and a second acceleration performance in the second test environment.

Among them, the vehicle chassis of this embodiment is an integrated intelligent chassis with complete functions such as battery, motor, electronic control, acceleration, braking, steering, etc., and can be delivered as an independent product.

Among them, the acceleration performance of the vehicle chassis refers to the ability of the vehicle chassis to quickly increase its driving speed.

In one application scenario, when designing a vehicle or a vehicle chassis, common operating conditions can be set based on research, WLTC and CLTC standard operating conditions, and road speed limit regulations, and the common operating conditions at least include starting acceleration conditions and overtaking acceleration conditions; the host computer sets a preset throttle opening and a corresponding preset starting speed and a preset ending speed, and controls the throttle opening to be the preset throttle opening through a throttle opening control device;

When conducting the acceleration performance test of the starting acceleration condition, the vehicle chassis is in a stationary state, the preset starting speed is zero, and the tester or operating equipment adjusts the throttle opening of the vehicle chassis through the throttle opening control device, and makes the throttle opening fully open, the vehicle chassis starts and begins to accelerate; when the speed accelerates to the preset end speed, the throttle opening control device controls the throttle opening to decrease to 0, entering the deceleration stage, and the throttle opening control device records the driving speed data;

When conducting the acceleration performance test of the overtaking acceleration condition, the tester or the operating equipment adjusts the throttle opening of the vehicle chassis through the throttle opening control device to make the speed reach the preset starting speed. The throttle opening control device controls the throttle opening to be fully open, the vehicle chassis starts to accelerate, and starts to record the driving speed; when the vehicle chassis accelerates to the preset end speed, the throttle opening control device controls the throttle opening to be reduced to 0, entering the deceleration stage, and the throttle opening control device records the driving speed data.

In one application scenario, the power spectrum analysis of the vehicle speed signal can be performed, and the vehicle speed signal can be low-pass filtered to make the filtered speed curve smooth. The smoothed vehicle speed signal is then differentiated to obtain an acceleration signal, and finally the acceleration performance is obtained based on the acceleration signal.

This embodiment at least controls the vehicle chassis to adopt the above-mentioned method to control the vehicle chassis to accelerate movement in a first test environment and obtain a first acceleration performance, and controls the vehicle chassis to adopt the above-mentioned control method to control the vehicle chassis to accelerate movement in a second test environment and obtain a second acceleration performance.

Step S22: Obtaining the overall acceleration performance of the vehicle chassis based at least on the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of a driving road, a chassis test platform, and a whole vehicle test platform, and the second test environment includes another one of a driving road, a chassis test platform, and a whole vehicle test platform.

The chassis test platform refers to a test platform used to test the acceleration performance of the vehicle chassis, which may include a four-motor test bench, etc., on which the driving environment of the vehicle chassis on the road can be simulated, thereby simulating the accelerated driving of the vehicle chassis; the whole vehicle test platform refers to a test platform used to test the acceleration performance of the whole vehicle, which may include a vehicle dynamometer, etc.

The present application can realize the separate test of the acceleration performance of the vehicle chassis, so that the acceleration performance of the vehicle chassis can be accurately verified when it is delivered as an independent product; and the present application is based on the overall acceleration performance of the vehicle chassis obtained by combining the first acceleration performance of the vehicle chassis under at least a first test environment and the second acceleration performance under a second test environment, and can comprehensively consider the acceleration performance under multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis, thereby improving its reliability.

In some embodiments, steps S31 to S33 in the method as shown in FIG. 3 can be used to control the vehicle chassis to perform acceleration movement at least under the first test environment and the second test environment, and at least obtain the first acceleration performance of the vehicle chassis under the first test environment and the second acceleration performance under the second test environment, i.e., the above-mentioned step S21.

Step S31: Control the vehicle chassis to perform acceleration movement on the driving road, and obtain a first acceleration performance of the vehicle chassis.

In the actual use environment of the vehicle, that is, when certain driving and braking conditions are met on the driving road, the acceleration movement of the vehicle chassis on the driving road is controlled to perform an acceleration test to obtain the first acceleration performance of the vehicle chassis.

Step S32: Control the vehicle chassis to perform accelerated motion on the chassis test platform, and obtain a second acceleration performance of the vehicle chassis.

The vehicle chassis is mounted on the chassis test platform, and the vehicle chassis is controlled to perform accelerated motion on the chassis test platform to perform an acceleration test and obtain a second acceleration performance of the vehicle chassis.

Step S33: controlling the vehicle chassis to perform accelerated motion on the whole vehicle test platform, and obtaining a third acceleration performance of the vehicle chassis.

The vehicle chassis is installed on the whole vehicle test platform, and the vehicle chassis is controlled to perform accelerated movement on the whole vehicle test platform to perform an acceleration test to obtain the third acceleration performance of the vehicle chassis.

The overall acceleration performance of the vehicle chassis can be obtained based at least on the first acceleration performance and the second acceleration performance, ie, the above-mentioned step S22, through step S34 in the method shown in FIG. 3 .

Step S34: obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance.

The host computer processes the first acceleration performance, the second acceleration performance and the third acceleration performance to obtain the overall acceleration performance of the vehicle chassis.

This embodiment obtains the acceleration performance of the vehicle chassis in three different test environments respectively, and obtains the overall acceleration performance of the vehicle chassis based on the acceleration performance in the three test environments. Therefore, the overall acceleration performance not only takes into account the first acceleration performance of the vehicle chassis on the actual driving road, but also takes into account the second acceleration performance of the vehicle chassis in the experimental environment and the third acceleration performance of the whole vehicle in the experimental environment, which can improve the test accuracy of the vehicle chassis and the acceleration performance of the vehicle.

In some embodiments, the overall acceleration performance of the vehicle chassis can be obtained based on a first acceleration performance of the vehicle chassis on a driving road and a second acceleration performance on a chassis test platform, or based on the first acceleration performance of the vehicle chassis on a driving road and a third acceleration performance on a whole vehicle test platform, or based on the second acceleration performance of the vehicle chassis on the chassis test platform and a third acceleration performance on the whole vehicle test platform, or based on the first acceleration performance of the vehicle chassis on the driving road, or based on the second acceleration performance of the vehicle chassis on the chassis test platform.

In some embodiments, the first acceleration performance includes a first acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a driving road; the second acceleration performance includes a second acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a chassis test platform; the third acceleration performance includes a third acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed on a whole vehicle test platform.

This embodiment characterizes the acceleration performance of the vehicle chassis by the acceleration time of the vehicle chassis accelerating from a preset starting speed to a preset ending speed. This is simple and easy to implement, with high accuracy, and the evaluation and definition of the acceleration performance are more intuitive. In addition, this embodiment uses the same parameters to characterize the acceleration performance under different test environments, which can simplify the calculation and improve the measurement accuracy of the acceleration performance of the vehicle chassis.

In some embodiments, the overall acceleration performance of the vehicle chassis is obtained based on the first acceleration performance, the second acceleration performance and the third acceleration performance, that is, the above step S34 specifically includes: calculating the average of the first acceleration duration, the second acceleration duration and the third acceleration duration as the acceleration duration of the vehicle chassis from a preset starting speed to a preset ending speed.

The host computer calculates the average acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the vehicle chassis acceleration performance.

In some embodiments, the mean is an average.

In some embodiments, the mean can be a weighted value, and weights can be set for multiple test environments based on historical data or actual needs. The host computer obtains the weighted value based on the acceleration time and corresponding weights under multiple test environments, and uses the weighted value as the acceleration performance of the vehicle chassis.

In some embodiments, the overall acceleration performance of the vehicle chassis is obtained based on the first acceleration performance, the second acceleration performance and the third acceleration performance, that is, the above step S34 specifically includes step S41 and step S42 as shown in FIG. 4 .

Step S41: respectively obtaining a first difference between the first acceleration duration and the second acceleration duration, a second difference between the second acceleration duration and the third acceleration duration, and a third difference between the third acceleration duration and the first acceleration duration.

The host computer calculates the difference in acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed on any two of the driving road, the chassis test platform and the whole vehicle test platform.

Step S42: In response to the first difference, the second difference and the third difference being less than or equal to the difference threshold, the average of the first acceleration duration, the second acceleration duration and the third acceleration duration is calculated as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed.

The difference threshold may be set based on specific test environment and performance requirements of the vehicle chassis.

If it is determined that the difference between the acceleration times of the vehicle chassis from a preset starting speed to a preset ending speed under any two test environments is less than or equal to the difference threshold, that is, the acceleration times measured for the vehicle chassis under multiple test environments have a small deviation, then the host computer calculates the average of the acceleration times of the vehicle chassis from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the vehicle chassis acceleration performance.

In some embodiments, the mean is an average value; or the mean can be a weighted value, and weight values can be set for various test environments based on historical data or actual needs. The upper computer obtains the weighted value based on the acceleration time and the corresponding weight value under various test environments, and uses the weighted value as the acceleration performance of the vehicle chassis.

In some embodiments, the overall acceleration performance of the vehicle chassis is obtained based on the first acceleration performance, the second acceleration performance and the third acceleration performance, that is, the above step S34 specifically includes steps S51 to S53 as shown in FIG. 5 .

Step S51: respectively obtaining a first difference between the first acceleration duration and the second acceleration duration, a second difference between the second acceleration duration and the third acceleration duration, and a third difference between the third acceleration duration and the first acceleration duration.

The host computer calculates the difference in acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed on any two of the driving road, the chassis test platform and the whole vehicle test platform.

Step S52: In response to the first difference, the second difference and the third difference being less than or equal to the difference threshold, the average of the first acceleration duration, the second acceleration duration and the third acceleration duration is calculated as the acceleration duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed.

If it is determined that the difference between the acceleration times of the vehicle chassis from a preset starting speed to a preset ending speed under any two test environments is less than or equal to the difference threshold, that is, the acceleration times measured for the vehicle chassis under multiple test environments have a small deviation, then the host computer calculates the average of the acceleration times of the vehicle chassis from a preset starting speed to a preset ending speed under different test environments as the acceleration performance of the vehicle chassis, which can improve the test accuracy of the vehicle chassis acceleration performance.

Step S53: In response to one of the first difference, the second difference and the third difference being less than or equal to the difference threshold, and the other two being greater than the difference threshold, the average of the two acceleration durations corresponding to the differences less than the difference threshold is taken as the acceleration duration for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed.

If one of the first difference, the second difference, and the third difference is less than or equal to the difference threshold, and the other two are greater than the difference threshold, it can be considered that the test error of one of the test environments is large, and the corresponding test data is abandoned. The host computer calculates the average of the other two acceleration durations with smaller deviations as the acceleration duration of the vehicle chassis from the preset starting speed to the preset ending speed. In this way, the test data with large test errors can be automatically eliminated, thereby improving the test accuracy of the vehicle chassis.

If the first difference, the second difference and the third difference are all greater than the difference threshold, the host computer abandons the test data.

The difference threshold may be set based on specific test environment and performance requirements of the vehicle chassis.

In some embodiments, the mean is an average value; or the mean can be a weighted value, and weight values can be set for various test environments based on historical data or actual needs. The upper computer obtains the weighted value based on the acceleration time and the corresponding weight value under various test environments, and uses the weighted value as the acceleration performance of the vehicle chassis.

In some embodiments, the vehicle chassis is controlled to perform acceleration movements at least in a first test environment and a second test environment, and at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment are obtained, that is, the above-mentioned step S21 specifically includes: controlling the vehicle chassis to perform multiple acceleration movements on the driving road with multiple sets of different preset starting speeds and ending speeds, and obtaining a first acceleration duration of the vehicle chassis for each acceleration movement; controlling the vehicle chassis to perform multiple acceleration movements on a chassis test platform with multiple sets of different preset starting speeds and ending speeds, and obtaining a second acceleration duration of the vehicle chassis for each acceleration movement; controlling the vehicle chassis to perform multiple acceleration movements on a whole vehicle test platform with multiple sets of different preset starting speeds and ending speeds, and obtaining a third acceleration duration of the vehicle chassis for each acceleration movement.

Multiple sets of different preset starting speeds and ending speeds can be set based on the acceleration index of the vehicle chassis and the acceleration index of the vehicle. For example, the preset starting speed and ending speed can be (0km/h, 100km/h), (50km/h, 80km/h), (60km/h, 100km/h), (80km/h, 120km/h), etc., that is, the vehicle speed of the vehicle chassis under a variety of different test environments is obtained, that is, the acceleration time of the working conditions is 0-100km/h, 50-80km/h, 60-100km/h, 80-120km/h, etc.

This embodiment obtains the acceleration performance of the vehicle chassis under various acceleration conditions in each test environment, which can enrich the acceleration performance evaluation and parameter index definition of the vehicle chassis and the vehicle.

In some embodiments, the vehicle chassis is controlled to perform accelerated motion on the chassis test platform, and the second acceleration performance of the vehicle chassis is obtained, that is, the above step S32 specifically includes steps S61 to S63 as shown in FIG. 6 .

Step S61: Obtaining a device loading curve.

The equipment loading curve can be obtained by referring to the vehicle end conversion or by looking up the table C.1 in the GB18352.5 standard.

Step S63: Determine the resistance value of the vehicle chassis on the chassis test platform based on the equipment loading curve.

In order to allow the vehicle chassis to run normally on the chassis test platform, it is necessary to simulate the resistance value of the vehicle chassis on the driving road. The resistance value can be set based on the equipment loading curve of the vehicle chassis.

The chassis test platform can be provided with a damping simulation device connected to the wheel end of the vehicle chassis, such as a resistance motor. The resistance output of the resistance motor to the wheel end of the vehicle chassis can be set to simulate the resistance conditions received by the vehicle chassis during actual driving under different working conditions.

Step S63: Control the vehicle chassis to resist the corresponding resistance value and perform accelerated movement on the chassis test platform.

This embodiment further sets the resistance between the vehicle chassis and the chassis test platform based on the equipment loading curve of the vehicle chassis, so as to simulate the acceleration movement of the vehicle chassis on the actual driving road, so that the acceleration movement of the vehicle chassis on the chassis test platform is more consistent with the acceleration movement on the actual driving road, thereby improving the accuracy of the vehicle chassis acceleration performance test.

In some embodiments, the present application further proposes a method for testing the acceleration performance of a vehicle. As shown in FIG7 , the method for testing the acceleration performance of this embodiment specifically includes the following steps:

Step S71: Obtain the acceleration performance of the vehicle chassis.

In some embodiments, the vehicle chassis is controlled to perform acceleration motion at least in the first test environment and the second test environment, and at least the first acceleration performance of the vehicle chassis in the first test environment and the second acceleration performance in the second test environment are obtained; the overall acceleration performance of the vehicle chassis is obtained at least based on the first acceleration performance and the second acceleration performance; wherein the first test environment includes one of a driving road, a chassis test platform, and a whole vehicle test platform, and the second test environment includes another of a driving road, a chassis test platform, and a whole vehicle test platform. In this way, the present application can realize a separate test of the acceleration performance of the vehicle chassis, so that when the vehicle chassis is delivered as an independent product, its acceleration performance is accurately verified; and the present application is based on the overall acceleration performance of the vehicle chassis obtained by combining the first acceleration performance of the vehicle chassis at least in the first test environment and the second acceleration performance of the vehicle chassis in the second test environment, and can comprehensively consider the acceleration performance under multiple test environments, thereby improving the test accuracy of the acceleration performance of the vehicle chassis, thereby improving its reliability.

In one application scenario, the acceleration performance may include acceleration, controlling the vehicle chassis to accelerate on the driving road, and obtaining a first acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed; controlling the vehicle chassis to accelerate on a chassis test platform, and obtaining a second acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed; controlling the vehicle chassis to accelerate on a whole vehicle test platform, and obtaining a third acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed; calculating the average of the first acceleration time, the second acceleration time and the third acceleration time as the acceleration time for the vehicle chassis to accelerate from a preset starting speed to a preset ending speed.

Step S72: Obtaining the vehicle acceleration performance based on the acceleration performance, the first attribute parameter of the vehicle chassis and the second attribute parameter of the upper body of the vehicle.

The host computer obtains the acceleration performance of the vehicle based on the acceleration performance of the vehicle chassis, the first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle, thereby realizing the acceleration performance test of the whole vehicle.

Different types of upper bodies can be loaded onto the vehicle chassis to test the acceleration performance of different vehicle models.

This embodiment first tests the acceleration performance of the vehicle chassis alone, and then obtains the acceleration performance of the vehicle based on the acceleration performance and the first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle upper body. There is no need to test the acceleration performance of the whole vehicle, which can improve the definition of vehicle and component parameter indicators at different levels in the whole vehicle development process, shorten the test cycle of the OEM in the whole vehicle development process, simplify the process and reduce the result burden.

In some embodiments, the first attribute parameters include a first test mass of the vehicle chassis, a first frontal area of the vehicle chassis, a tire rolling resistance coefficient of the vehicle chassis, and a first drag coefficient of the vehicle chassis; the second attribute parameters include a second test mass of the upper vehicle body, a second frontal area of the upper vehicle body, and a second drag coefficient of the upper vehicle body.

In terms of vehicle acceleration performance, the biggest difference between the vehicle chassis and the whole vehicle is that the wind resistance of the whole vehicle is significantly greater than that of the vehicle chassis because the whole vehicle is equipped with an upper body. Therefore, this embodiment uses the first windward area and the first drag coefficient of the vehicle chassis and the second windward area and the second drag coefficient of the upper body as consideration parameters for the acceleration performance test of the whole vehicle, which can improve the measurement accuracy of the acceleration performance of the whole vehicle.

Among them, the first test mass of the vehicle chassis refers to the sum of the curb mass and the load mass of the vehicle chassis; the second test mass of the upper body is the sum of the curb mass and the load mass of the upper body.

The rolling resistance coefficient of the tire of the vehicle chassis, that is, the tire specifications are defined during vehicle development. It can be found according to different starting speeds and ending speeds, and the rolling resistance coefficient of the tire at the current vehicle speed can be calculated.

This embodiment uses the test mass, the vehicle's frontal area, the tire rolling resistance coefficient, and the first drag coefficient as relevant parameters for obtaining the acceleration performance, which can improve the test accuracy of the vehicle's acceleration performance.

In some embodiments, the acceleration performance includes the acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed. The acceleration time may be the average of the acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed under a plurality of different test environments.

Acquiring the vehicle acceleration performance based on the acceleration performance, the first attribute parameter of the vehicle chassis and the second attribute parameter of the vehicle upper body specifically includes steps S81 to S83 as shown in FIG. 8 .

Step S81: respectively obtain a fourth difference between the second test mass and the first test mass, a fifth difference between the second drag coefficient and the first drag coefficient, and a sixth difference between the second frontal area and the first frontal area.

The host computer obtains the fourth difference (M4′-M1′) between the second test mass M4′ and the first test mass M1′, the fifth difference (W2-W1) between the second drag coefficient W2 and the first drag coefficient W1, and the sixth difference (A2-A1) between the second frontal area A2 and the first frontal area A1.

Step S82: Obtain the product of the acceleration time, the fourth difference, the fifth difference, the sixth difference, and the tire rolling resistance coefficient.

The host computer obtains the product T4*(M4′-M1′)*(W2-W1)*(A2-A1)*F1 of the acceleration time T4, the fourth difference (M4′-M1′), the fifth difference (W2-W1), the sixth difference (A2-A1), and the tire rolling resistance coefficient F1.

Step S83: Obtain the sum of the percentage of the product and the acceleration time as the entire vehicle acceleration time.

The upper computer obtains the percentage of the product (T4*(M4′-M1′)*(W2-W1)*(A2-A1)*F1) and the sum of the acceleration time T4, T5=[T4*{(M4′-M1′)*(W2-W1)*(A2-A1)*F1}/100]+T4, which is the whole vehicle acceleration time.

This embodiment can obtain the vehicle's whole vehicle acceleration time through the above-mentioned preset relationship, and because the whole vehicle acceleration performance takes into account the acceleration time of the vehicle chassis, the attribute parameters of the vehicle chassis and the attribute parameters of the upper body, it can improve the test accuracy of the whole vehicle acceleration time.

In some embodiments, the acceleration performance test method further includes: defining a parameter index of the vehicle based on the acceleration performance of the whole vehicle and the overall acceleration performance of the vehicle chassis. This embodiment can define the parameter index of the vehicle based on the acceleration performance of the whole vehicle and the overall acceleration performance of the vehicle chassis, and can improve the definition of vehicle and component parameter indexes at different levels in the whole vehicle development process.

In some embodiments, a first curb mass M1, a first test mass M1′, a first frontal area A1, a tire rolling resistance coefficient F1 (the rolling resistance at the current vehicle speed can be searched and calculated according to different starting speeds and ending speeds), and a first drag coefficient W1 of the vehicle chassis are determined; after certain driving and braking conditions are met on the actual driving road, the acceleration verification of the vehicle chassis on the driving road is controlled to obtain a first acceleration time T1; the vehicle chassis is installed on a four-motor test bench, and an equipment loading curve is obtained (the conversion can be referred to the whole vehicle end or the table C.1 in GB18352.5 can be looked up), and an acceleration test of the vehicle chassis is performed on the four-motor test bench to obtain a second acceleration time T2; the vehicle chassis is installed on a vehicle dynamometer, and an acceleration test of the vehicle chassis is performed on the vehicle dynamometer to obtain a third acceleration time T3; and the difference between any two of T1, T2, and T3 is compared. When When the differences are all within 2‰, it is judged that the acceleration test of the vehicle chassis meets the index requirements, and the average value T4 of T1, T2, and T3 is calculated; when the acceleration time T4 of the vehicle chassis is determined, when matching different upper bodies, the second curb mass M4, the second test mass M4′, the windward area A2, and the drag coefficient W2 of the upper body are determined, and the vehicle acceleration time T5 of the whole vehicle is calculated, T5＝[T4*{((M4′-M1′)*(W2-W1)*(A2-A1)*F1)}/100]+T4; according to the result of T5, verification is carried out on upper bodies of different shapes and weights, and compared with the simulation value, so as to obtain the acceleration time of the whole vehicle; on the basis of T4, the acceleration time of the vehicle chassis under different test conditions, that is, working conditions (0-100km/h, 50-80km/h, 60-100km/h, 80-120km/h, etc.) is obtained. Through the above-mentioned method, this embodiment can realize the acceleration performance test of the vehicle chassis without body parts installed; this embodiment can improve the definition of vehicle and component parameter indicators at different levels in the whole vehicle development process; this embodiment can also shorten the test cycle of the OEM in the whole vehicle development process, simplify the test process and reduce the result burden; this embodiment can also enhance the use coverage of the vehicle chassis and adapt to more comprehensive and complete vehicle models.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims (12)

A method for testing the acceleration performance of a vehicle chassis, characterized in that the method comprises: Controlling the vehicle chassis to perform acceleration motion at least under a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment; obtaining an overall acceleration performance of the vehicle chassis based at least on the first acceleration performance and the second acceleration performance; The first test environment includes one of a driving road, a chassis test platform, and a whole vehicle test platform, and the second test environment includes another one of the driving road, the chassis test platform, and the whole vehicle test platform. The acceleration performance test method according to claim 1 is characterized in that the controlling the vehicle chassis to perform acceleration motion at least under a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment, respectively, comprises: Controlling the vehicle chassis to perform accelerated motion on the driving road, and obtaining a first acceleration performance of the vehicle chassis; Controlling the vehicle chassis to perform accelerated motion on the chassis test platform, and obtaining a second acceleration performance of the vehicle chassis; Controlling the vehicle chassis to perform accelerated motion on the whole vehicle test platform, and obtaining a third acceleration performance of the vehicle chassis; The obtaining the overall acceleration performance of the vehicle chassis based at least on the first acceleration performance and the second acceleration performance comprises: The overall acceleration performance of the vehicle chassis is obtained based on the first acceleration performance, the second acceleration performance and the third acceleration performance. The acceleration performance test method according to claim 2, characterized in that the first acceleration performance comprises a first acceleration time duration of the vehicle chassis accelerating from a preset starting speed to a preset ending speed on the driving road; The second acceleration performance includes a second acceleration time duration for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed on the chassis test platform; The third acceleration performance includes a third acceleration time duration for the vehicle chassis to accelerate from the preset starting speed to the preset ending speed on the whole vehicle test platform. The acceleration performance testing method according to claim 3, characterized in that the step of obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance, and the third acceleration performance comprises: The average of the first acceleration duration, the second acceleration duration, and the third acceleration duration is calculated as the acceleration duration of the vehicle chassis accelerating from the preset starting speed to the preset ending speed. The acceleration performance testing method according to claim 4, characterized in that the step of obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance further comprises: Respectively obtaining a first difference between the first acceleration duration and the second acceleration duration, a second difference between the second acceleration duration and the third acceleration duration, and a third difference between the third acceleration duration and the first acceleration duration; In response to the first difference, the second difference and the third difference being less than or equal to a difference threshold, the average of the first acceleration duration, the second acceleration duration and the third acceleration duration is calculated as the acceleration duration of the vehicle chassis from the preset starting speed to the preset ending speed. The acceleration performance testing method according to claim 5, characterized in that the step of obtaining the overall acceleration performance of the vehicle chassis based on the first acceleration performance, the second acceleration performance and the third acceleration performance further comprises: In response to one of the first difference, the second difference and the third difference being less than or equal to the difference threshold, and the other two being greater than the difference threshold, the average of the two acceleration durations corresponding to the differences less than the difference threshold is taken as the acceleration duration of the vehicle chassis from the preset starting speed to the preset ending speed. The acceleration performance test method according to claim 3 is characterized in that the controlling the vehicle chassis to perform acceleration motion at least under a first test environment and a second test environment, and obtaining at least a first acceleration performance of the vehicle chassis under the first test environment and a second acceleration performance under the second test environment, respectively, comprises: Controlling the vehicle chassis to perform multiple acceleration movements on the driving road at multiple different sets of the preset starting speeds and the preset ending speeds, and obtaining a first acceleration duration of the vehicle chassis during each acceleration movement; Controlling the vehicle chassis to perform multiple acceleration movements on the chassis test platform at the multiple different sets of the preset starting speeds and the ending speeds, and obtaining a second acceleration duration of the vehicle chassis during each acceleration movement; The vehicle chassis is controlled to perform multiple acceleration movements on the whole vehicle test platform at the multiple different sets of the preset starting speeds and the ending speeds, and a third acceleration duration of the vehicle chassis for each acceleration movement is obtained. The acceleration performance test method according to any one of claims 2 to 7 is characterized in that the step of controlling the vehicle chassis to perform an accelerated motion on the chassis test platform and obtaining the second acceleration performance of the vehicle chassis comprises: Get the equipment loading curve; determining a resistance value of the vehicle chassis on the chassis test platform based on the equipment loading curve; The vehicle chassis is controlled to resist the corresponding resistance value to perform accelerated movement on the chassis test platform. A method for testing the acceleration performance of a vehicle, characterized in that the method comprises: The overall acceleration performance of the vehicle chassis of the vehicle is obtained by using the acceleration performance test method according to any one of claims 1 to 8; The whole vehicle acceleration performance of the vehicle is obtained based on the overall acceleration performance, the first attribute parameter of the vehicle chassis and the second attribute parameter of the upper body of the vehicle. The acceleration performance test method according to claim 9, characterized in that the first attribute parameter includes a first test mass of the vehicle chassis, a first frontal area of the vehicle chassis, a tire rolling resistance coefficient of the vehicle chassis, and a first wind resistance coefficient of the vehicle chassis; The second attribute parameters include a second test mass of the upper vehicle body, a second frontal area of the upper vehicle body, and a second drag coefficient of the upper vehicle body. The acceleration performance test method according to claim 10 is characterized in that the acceleration performance includes the acceleration time of the vehicle chassis from a preset starting speed to a preset ending speed; the whole vehicle acceleration performance of the vehicle is obtained based on the acceleration performance, the first attribute parameter of the vehicle chassis and the second attribute parameter of the upper body of the vehicle, comprising: respectively acquiring a fourth difference between the second test mass and the first test mass, a fifth difference between the second drag coefficient and the first drag coefficient, and a sixth difference between the second frontal area and the first frontal area; Obtaining a product of the acceleration duration, the fourth difference, the fifth difference, the sixth difference, and the tire rolling resistance coefficient; The sum of the percentage of the product and the acceleration duration is obtained as the whole vehicle acceleration duration of the vehicle. The acceleration performance testing method according to any one of claims 9 to 11, characterized in that the acceleration performance testing method further comprises: The parameter index of the vehicle is defined based on the acceleration performance of the whole vehicle and the overall acceleration performance of the vehicle chassis.