CN118008601A - Air inlet system fault judging method, device, equipment and storage medium - Google Patents

Abstract

The present application provides an intake system fault judgment method, device, equipment and storage medium, which relates to the field of fault detection technology. The method achieves a comprehensive and in-depth analysis of the engine's operating status by acquiring a number of key data during engine operation, including speed, exhaust temperature, torque and absolute pressure value after intercooling. Furthermore, by matching the speed of the target engine with the preset speed range, a detailed evaluation of the engine's operating status at different speeds can be performed, thereby improving the accuracy and pertinence of fault diagnosis. Finally, by comparing the judgment coefficient with the preset value of the judgment coefficient under the corresponding speed range, it is possible to quickly determine whether there is a fault in the engine's intake system. This method not only improves the efficiency and accuracy of fault diagnosis, but also helps to promptly discover and solve potential problems, avoid the expansion of faults, and thus ensure the safe and stable operation of the engine.

Description

Intake system fault judgment method, device, equipment and storage medium

Technical Field

The present application relates to the technical field of fault detection, and in particular to an intake system fault judgment method, device, equipment and storage medium.

Background technique

The engine air intake system, including key components such as air filters, superchargers, and air intake pipes, may experience blockage, leakage, or jamming during long-term use. These problems will increase the air intake resistance, which will affect the engine's performance indicators. In extreme cases, it may even cause the engine to fail to start or run. Therefore, it is very important to detect faults caused by blockage, leakage, and supercharger jamming of engine air intake system related components.

In order to effectively diagnose problems with the engine intake system, existing technologies mainly rely on manual detection of intake pressure and engine power, and judge whether there is a fault in the intake system by comparing whether the intake pressure reading is within the normal range and combining it with the change in engine power. If the intake pressure deviates from the normal range and the engine power decreases, it is generally believed that there is a problem with the intake system.

However, this manual detection method has obvious shortcomings when dealing with a large number of vehicle intake system fault detection. It not only consumes a lot of human resources, but also has low work efficiency. In the pursuit of efficient and accurate modern industrial production, this method obviously cannot meet the needs. Therefore, it is necessary to obtain a more efficient engine intake system fault detection method.

Summary of the invention

In view of the above problems, the present application provides an intake system fault judgment method, including the following contents:

In a first aspect, the present application provides a method for determining a fault in an intake system, the method comprising:

Acquiring operating data of multiple engines, wherein the operating data includes speed, exhaust temperature, torque, and absolute pressure value after intercooling;

selecting an engine in a stable operating state from the plurality of engines according to the rotation speed, the exhaust temperature and the torque;

Calculating a first determination coefficient value corresponding to the engine in a stable operation state, wherein the first determination coefficient value is calculated based on an exhaust temperature of the corresponding engine and an intake pressure value obtained according to the absolute pressure value after intercooling;

For a target engine in a stable operating state, matching the speed of the target engine with a plurality of preset speed ranges to determine a target preset speed range in which the speed of the target engine is located, each preset speed range having a corresponding second determination coefficient value;

Whether a fault occurs in the intake system of the target engine is determined by using a first judgment coefficient value corresponding to the target engine and a second judgment coefficient value corresponding to the target preset speed range.

Optionally, the determining whether a fault occurs in the intake system of the target engine by using a first judgment coefficient value corresponding to the target engine and a second judgment coefficient value corresponding to the target preset speed range includes:

When the first judgment coefficient value corresponding to the target engine is greater than or equal to the second judgment coefficient value corresponding to the target preset speed range, it is determined that a fault occurs in the intake system of the target engine.

Optionally, the method further includes:

The first judgment coefficient value and a preset judgment coefficient threshold are used to judge the cause of the failure of the intake system.

Optionally, the determining the cause of the failure of the intake system by using the first determination coefficient value and a preset determination coefficient threshold value includes:

When the first judgment coefficient value is greater than or equal to the preset judgment coefficient threshold, the judgment result is that the intake system has an air filter blockage or leakage fault;

When the first judgment coefficient value is less than the preset judgment coefficient threshold, the judgment result is that the intake system has a supercharger abnormal fault.

Optionally, the selecting an engine in a stable operating state from the plurality of engines according to the rotation speed, the exhaust temperature and the torque comprises:

Acquire a speed difference of the engine within a first preset time period, and compare the speed difference with a preset speed difference;

Acquire an average torque value of the engine within a second preset time period, and compare the average torque value with a preset average torque value;

Obtaining an average exhaust temperature of the engine within a second preset time period, and comparing the average exhaust temperature with a preset average exhaust temperature;

Acquire an exhaust temperature difference of the engine within a first preset time period, and compare the exhaust temperature difference with a preset exhaust temperature difference;

Engines that satisfy the conditions that the speed difference is less than or equal to the preset speed difference, the torque average is less than the preset torque average, the exhaust temperature average is less than the preset exhaust temperature average, and the exhaust temperature difference is less than the preset exhaust temperature difference are selected as engines in a stable operating state.

In a second aspect, the present application provides an intake system fault judgment device, the device comprising:

An acquisition unit, for acquiring operation data of a plurality of engines, wherein the operation data includes rotation speed, exhaust temperature, torque and absolute pressure value after intercooling;

a screening unit, configured to screen an engine in a stable operating state from the plurality of engines according to the rotation speed, the exhaust temperature and the torque;

a calculation unit, configured to calculate a first judgment coefficient value corresponding to the engine in a stable operation state, wherein the first judgment coefficient value is calculated based on an exhaust temperature of the corresponding engine and an intake pressure value obtained according to the absolute pressure value after intercooling;

a matching unit, for matching a rotation speed of a target engine in a stable running state with a plurality of preset rotation speed ranges, and determining a target preset rotation speed range in which the rotation speed of the target engine is located, each preset rotation speed range having a corresponding second judgment coefficient value;

The judgment unit is used to determine whether an intake system of the target engine fails by using a first judgment coefficient value corresponding to the target engine and a second judgment coefficient value corresponding to the target preset speed range.

Optionally, the judgment unit determines whether a fault occurs in the intake system of the target engine using a first judgment coefficient value corresponding to the target engine and a second judgment coefficient value corresponding to the target preset speed range, including:

When the first judgment coefficient value corresponding to the target engine is greater than or equal to the second judgment coefficient value corresponding to the target preset speed range, it is determined that a fault occurs in the intake system of the target engine.

Optionally, the device further comprises:

The fault cause determination unit is used to determine the fault cause of the intake system by using the first determination coefficient value and a preset determination coefficient threshold.

Optionally, the fault cause judgment unit is specifically configured to, when the first judgment coefficient value is greater than or equal to the preset judgment coefficient threshold, judge that the intake system has an air filter blockage or leakage fault;

When the first judgment coefficient value is less than the preset judgment coefficient threshold, the judgment result is that the intake system has a supercharger abnormal fault.

Optionally, the screening unit is specifically used to obtain a speed difference value of the engine within a first preset time period, and compare the speed difference value with a preset speed difference value;

Acquire an average torque value of the engine within a second preset time period, and compare the average torque value with a preset average torque value;

Obtaining an average exhaust temperature of the engine within a second preset time period, and comparing the average exhaust temperature with a preset average exhaust temperature;

Acquire an exhaust temperature difference of the engine within a first preset time period, and compare the exhaust temperature difference with a preset exhaust temperature difference;

Engines that satisfy the conditions that the speed difference is less than or equal to the preset speed difference, the torque average is less than the preset torque average, the exhaust temperature average is less than the preset exhaust temperature average, and the exhaust temperature difference is less than the preset exhaust temperature difference are selected as engines in a stable operating state.

In a third aspect, the present application provides a device, comprising a memory and a processor, wherein the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes so that the device executes the intake system fault judgment method introduced in any implementation of the first aspect.

In a fourth aspect, the present application provides a computer-readable storage medium, in which codes are stored. When the codes are executed, a device executing the codes implements the intake system fault judgment method introduced in any implementation of the first aspect.

The present application provides a method for judging the fault of an intake system. When executing the method, by obtaining the operating data of the engine, including the speed, exhaust temperature, torque and absolute pressure value after intercooling, a comprehensive monitoring of the operating state of the engine is achieved. By screening and processing these data, the engine in a stable operating state can be accurately identified, providing a reliable basis for subsequent fault diagnosis. When calculating the first judgment coefficient value, the intake pressure value obtained by the exhaust temperature and the absolute pressure value after intercooling is used for joint analysis, which effectively considers the mutual influence of the engine intake and exhaust systems, and improves the accuracy and reliability of fault diagnosis. By matching the speed of the target engine with multiple preset speed ranges, it is possible to perform differential analysis on the engine working state at different speeds, further enhancing the pertinence of fault diagnosis. Finally, by comparing the first judgment coefficient value with the second judgment coefficient value of the corresponding speed range, it is possible to quickly and accurately judge whether the intake system of the target engine has a fault. This method not only improves the efficiency of fault diagnosis, but also helps to timely discover and solve potential problems, thereby ensuring the safe and stable operation of the engine.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a flow chart of a method for determining a fault in an intake system provided by an embodiment of the present application;

FIG2 is a flow chart of another intake system fault determination method provided by an embodiment of the present application;

FIG3 is a schematic structural diagram of an intake system fault judgment device provided in an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

FIG1 is a flow chart of a method for determining a fault in an air intake system provided by an embodiment of the present application. In conjunction with FIG1 , the method for determining a fault in an air intake system provided by an embodiment of the present application may include:

S101, obtaining operating data of a plurality of engines, wherein the operating data includes rotation speed, exhaust temperature, torque and absolute pressure value after intercooling.

The operating data of the engine refers to the various data generated by the engine during operation, including speed, exhaust temperature, torque, and absolute pressure value after intercooling, etc., collected through specific sensors or equipment. These data can reflect the working status and performance of the engine.

Among them, the speed refers to the number of revolutions of the engine per minute, which is one of the important parameters for evaluating the working status and performance of the engine; the exhaust temperature refers to the temperature of the exhaust gas discharged by the engine, which reflects the combustion efficiency of the engine and the performance of the cooling system; the torque refers to the torque output from the crankshaft end of the engine, which indicates the ability of the engine to do work, that is, the size of the rotational torque that the engine can generate; the absolute pressure value after intercooling refers to the absolute pressure value of the air after it is compressed by the turbocharger, cooled by the intercooler, and then enters the engine. This value can reflect the working status of the supercharging system and the intake system.

When there are many engines that need to be tested for faults, the operating data of the engines that need to be tested can be obtained through real-time cloud monitoring. The cloud is vehicle cloud monitoring, which refers to a technical means of using cloud computing technology to monitor and manage the vehicle's operating status, location, safety and other information in real time. Specifically, vehicle cloud monitoring can collect various information about the vehicle through sensors, GPS positioning devices and other equipment installed on the vehicle, and transmit this information to the cloud server for processing and analysis. Through vehicle cloud monitoring, car owners or managers can understand the vehicle's operating conditions in real time. At the same time, vehicle cloud monitoring can also monitor and warn the vehicle's safety performance, such as vehicle theft, fault warning, collision warning, etc. Vehicle cloud monitoring can help car owners or managers understand the vehicle's operating conditions more comprehensively, discover and solve problems in a timely manner, and improve the safety and efficiency of the vehicle.

S102: Filter an engine in a stable operating state from the plurality of engines according to the rotation speed, the exhaust temperature and the torque.

An engine in a stable operating state refers to an engine that is in an operating state and operates stably. Whether it is in an operating state can be determined by the engine speed. Generally speaking, when the speed exceeds 200 revolutions per minute, the engine is considered to be in an operating state.

Since the output data of the engine is relatively stable and consistent when it is in a stable operating state, these data can more truly reflect the actual performance and status of the engine. In contrast, when the engine is in an unstable state such as starting, accelerating, decelerating or load mutation, its data fluctuates greatly, making it difficult to accurately evaluate its performance. In addition, when the engine is in an unstable state, various parameters of the engine such as speed, temperature, pressure, etc. may change rapidly, which may lead to increased measurement or calculation errors. Selecting an engine in a stable operating state can reduce this error and improve the accuracy of the analysis results.

Therefore, after selecting the engine in running state, it is necessary to further select the engine in stable running state for fault diagnosis and data analysis, so as to ensure the accuracy and reliability of the data and improve the analysis efficiency.

S103, calculating a first judgment coefficient value corresponding to the engine in a stable operating state, wherein the first judgment coefficient value is calculated based on the exhaust temperature of the corresponding engine and the intake pressure value obtained according to the absolute pressure value after intercooling.

The first judgment coefficient value is used to evaluate the working state or performance of the engine. Due to the positive correlation between engine power and intake pressure, when the intake pressure increases, it usually means that more air enters the engine cylinder, which has the potential to burn more fuel and generate more power. Torque is an important indicator of engine performance and is directly related to power. Therefore, there is also a certain correlation between torque and intake pressure. For the convenience of expression, in one example, the judgment coefficient is named A, where A = torque/square of intake pressure. Since the absolute pressure value after intercooling is obtained when the engine operation data is detected, it is known to those skilled in the art that the intercooler is located after the turbocharger. After the air is compressed by the turbocharger, the pressure will increase significantly, and then it will be cooled by the intercooler. Therefore, the pressure of the air treated by the intercooler (i.e., the pressure after intercooling) will be higher than the intake pressure without supercharging. Therefore, when calculating the judgment coefficient A, it is necessary to calculate the intake pressure value, for example, the absolute pressure value after intercooling is obtained minus the value 90 (this value is set by those skilled in the art based on experience) to obtain the intake pressure.

S104. For a target engine in a stable operating state, the speed of the target engine is matched with a plurality of preset speed ranges to determine a target preset speed range in which the speed of the target engine is located, each preset speed range having a corresponding second judgment coefficient value.

Since the performance and status of the engine are closely related to its speed, different speed ranges correspond to different working conditions and power outputs of the engine. Therefore, in order to accurately evaluate the performance of the engine and diagnose potential faults, it is necessary to match the engine speed with the preset speed range.

By testing a large amount of data in advance, the judgment coefficient threshold under different speed ranges is obtained, and the judgment coefficient threshold is used as the second judgment coefficient value to be compared with the first judgment coefficient value of the target engine to determine the working state of the engine or whether there is a fault.

When matching the speed with multiple preset speed ranges, the actual speed of the target engine is compared with the multiple preset speed ranges to determine the specific speed range to which it belongs. Each preset speed range usually corresponds to a different working state or performance characteristic of the engine. For example, multiple engine speed ranges are preset as shown in Table 1 below. Table 1 is a corresponding table of speed and judgment coefficient provided in an embodiment of the present application. It can be seen from the data in the table that when the speed is 480≤N＜600, the corresponding A value judgment condition is A≥20.

Table 1 Correspondence table of speed and judgment coefficient

S105. Determine whether an intake system of the target engine fails by using a first judgment coefficient value corresponding to the target engine and a second judgment coefficient value corresponding to the target preset speed range.

After the first coefficient value of the target engine is calculated using the real-time data of the target engine, the speed range corresponding to the speed of the target engine is obtained according to the above Table 1, and the first judgment coefficient value corresponding to the target engine and the second judgment coefficient value corresponding to the target preset speed range are further used to determine whether the intake system of the target engine has a fault. For example, when the speed of the target engine is 500 revolutions per minute, the speed range corresponding to the speed is first selected, which is 600≤N＜700, and further, the first judgment coefficient value is compared with the corresponding second judgment coefficient value 10.

In one implementation of the embodiment of the present application, the process of determining whether the intake system of the target engine is faulty by using the first judgment coefficient value corresponding to the target engine and the second judgment coefficient value corresponding to the target preset speed range is as follows: when the first judgment coefficient value is greater than or equal to the second judgment coefficient value corresponding to the first preset speed range, it is determined that the intake system of the target engine is faulty.

If the first judgment coefficient value is greater than or equal to the second judgment coefficient value, it means that the current intake system status is beyond the normal range, so it can be determined that the intake system of the target engine has a fault. This judgment method helps to promptly discover problems with the engine intake system and prevent more serious faults from occurring. At the same time, it also provides maintenance personnel with clear fault indications to facilitate targeted repairs and maintenance.

In the above step S102 of the present application, an engine in a stable operating state is selected from the multiple engines based on the rotational speed, the exhaust temperature and the torque, and the judgment is specifically made based on the engine's rotational speed, exhaust temperature and torque.

Obtain the speed difference of the engine within a first preset time period, and compare the speed difference with the preset speed difference; obtain the torque average value of the engine within a second preset time period, and compare the torque average value with the preset torque average value; obtain the exhaust temperature average value of the engine within the second preset time period, and compare the exhaust temperature average value with the preset exhaust temperature average value; obtain the exhaust temperature difference of the engine within the first preset time period, and compare the exhaust temperature difference with the preset exhaust temperature difference; filter out engines that satisfy the conditions that the speed difference is less than or equal to the preset speed difference, the torque average value is less than the preset torque average value, the exhaust temperature average value is less than the preset exhaust temperature average value, and the exhaust temperature difference is less than the preset exhaust temperature difference, as engines in a stable operating state.

First, compare the speed difference, obtain the speed difference of the engine within the first preset time period, and obtain the difference between the maximum and minimum values of the engine speed within a specific time period (for example, a few minutes or seconds). This difference can reflect the fluctuation of the engine speed during this period. Then, compare this speed difference with a preset threshold (i.e., the preset speed difference). If the speed difference is less than or equal to the preset speed difference, it means that the engine speed is relatively stable during this period and there is no excessive fluctuation. In one implementation of the present application, the first preset time is 10s, and the preset speed difference can be 5 rpm. It is determined whether the speed difference within 10s is less than or equal to 5 rpm.

Then, the torque average value of the engine in the second preset time period is obtained. Similarly, the torque average value of the engine in another time period (which may be different from the first preset time period) needs to be calculated. The torque average value can reflect the load condition of the engine during this period. The calculated torque average value is compared with a preset threshold value (i.e., the preset torque average value). If the torque average value is less than the preset torque average value, it means that the engine load is light during this period and may be in a relatively stable working state. In one implementation of the present application, the second preset time period is 30s, the preset torque is 150 Nm, and the average torque value of the engine within 30s is compared to see whether it is less than the preset torque average value of 150 Nm.

When comparing the exhaust temperature average values, first obtain the exhaust temperature average value of the engine within the second preset time period, and also calculate the exhaust temperature average value of the engine within a period of time. Exhaust temperature is one of the important indicators of the working state of the engine. Compare the calculated exhaust temperature average value with a preset threshold value (i.e., the preset exhaust temperature average value). If the exhaust temperature average value is less than the preset exhaust temperature average value, this may mean that the working state of the engine is relatively stable and there are no abnormal conditions such as overheating. In one implementation of the present application, obtaining the exhaust temperature average value of the engine within the second preset time period refers to obtaining the exhaust temperature average value within 30s, and comparing it with the preset exhaust temperature average value of 3°C to determine whether the exhaust temperature average value is less than the preset exhaust temperature average value.

When comparing the exhaust temperature difference, obtain the exhaust temperature difference of the engine within the first preset time period: Similarly, calculate the difference between the maximum and minimum exhaust temperature of the engine within the first preset time period. This difference can reflect the fluctuation of the exhaust temperature during this period. Compare the exhaust temperature difference with the preset exhaust temperature difference: Finally, compare this exhaust temperature difference with a preset threshold (i.e., the preset exhaust temperature difference). If the exhaust temperature difference is less than the preset exhaust temperature difference, it means that the exhaust temperature is relatively stable during this period and there is no large fluctuation. In one implementation of the present application, by obtaining the difference between the maximum and minimum exhaust temperature within 10s, and then comparing it with the preset exhaust temperature difference of 3°C, it is determined whether the exhaust temperature difference is less than the preset exhaust temperature difference.

After comparing the above four aspects, engines that meet all the conditions are selected: engines with small speed difference, low torque average value, low exhaust temperature average value and small exhaust temperature difference. These engines are considered to be in stable operation. This screening method comprehensively considers multiple important parameters of the engine and can more accurately judge the operating status of the engine, providing strong support for subsequent fault diagnosis and performance optimization.

The embodiment of the present application also provides another intake system fault judgment method, as shown in FIG2 , the intake system fault judgment method includes:

S201. Acquire operating data of a plurality of engines, wherein the operating data includes rotation speed, exhaust temperature, torque, and absolute pressure value after intercooling.

S202: Filter an engine in a stable operating state from the plurality of engines according to the rotation speed, the exhaust temperature and the torque.

S203, calculating a first judgment coefficient value corresponding to the engine in a stable operating state, wherein the first judgment coefficient value is calculated based on the exhaust temperature of the corresponding engine and the intake pressure value obtained according to the absolute pressure value after intercooling.

S204. For a target engine in a stable operating state, the speed of the target engine is matched with a plurality of preset speed ranges to determine a target preset speed range in which the speed of the target engine is located, each preset speed range having a corresponding second judgment coefficient value.

S205: Determine whether an intake system of the target engine fails by using a first judgment coefficient value corresponding to the target engine and a second judgment coefficient value corresponding to the target preset speed range.

The specific implementation of steps S201 to S205 may refer to S101 to S105 in the above embodiment and FIG. 1 , and will not be described in detail here.

S206: Determine the cause of the failure of the intake system by using the first judgment coefficient value and a preset judgment coefficient threshold.

When the first judgment coefficient value is greater than or equal to the preset judgment coefficient threshold, the judgment result is that the intake system has an air filter blockage or leakage fault; when the first judgment coefficient value is less than the preset judgment coefficient threshold, the judgment result is that the intake system has a supercharger abnormal fault.

In one implementation of the embodiment of the present application, the preset judgment coefficient threshold is 30. When the first judgment coefficient value is greater than or equal to the preset judgment coefficient threshold (i.e., 30), the judgment result is that the intake system has an air filter blockage or leakage fault. This means that when the first judgment coefficient value reaches or exceeds this threshold, the system is more likely to be affected by air filter blockage or leakage. If the first judgment coefficient value is less than the preset judgment coefficient threshold, the judgment result is that the intake system has an abnormal supercharger fault. This shows that when the first judgment coefficient value is lower than this threshold, the intake system fault is more likely to be related to the supercharger. This fault judgment method based on numerical comparison helps to quickly locate and identify specific problems in the engine intake system, and provides clear guidance for subsequent repairs and maintenance.

The above embodiment of the present application provides a method for judging the fault of the intake system, which realizes the comprehensive monitoring of the engine running state by obtaining the running data of the engine, including the speed, exhaust temperature, torque and absolute pressure value after intercooling. By screening and processing these data, the engine in a stable running state can be accurately identified, providing a reliable basis for subsequent fault diagnosis. When calculating the first judgment coefficient value, the intake pressure value obtained by the exhaust temperature and the absolute pressure value after intercooling is used for joint analysis, which effectively considers the mutual influence of the engine intake and exhaust system, and improves the accuracy and reliability of fault diagnosis. By matching the speed of the target engine with multiple preset speed ranges, it is possible to perform differential analysis on the engine working state at different speeds, further enhancing the pertinence of fault diagnosis. Finally, by comparing the first judgment coefficient value and the second judgment coefficient value of the corresponding speed range, it is possible to quickly and accurately judge whether the intake system of the target engine has a fault. This method not only improves the efficiency of fault diagnosis, but also helps to timely discover and solve potential problems, thereby ensuring the safe and stable operation of the engine.

The above are some specific implementations of an intake system fault judgment method provided in the embodiment of the present application. Based on this, the present application also provides a corresponding device. The device provided in the embodiment of the present application will be introduced from the perspective of functional modularization.

FIG3 is a schematic structural diagram of an intake system fault judgment device provided in an embodiment of the present application.

As shown in FIG. 3 , an intake system fault judgment device 300 provided in an embodiment of the present application includes:

An acquisition unit 310 is used to acquire operating data of multiple engines, wherein the operating data includes speed, exhaust temperature, torque and absolute pressure value after intercooling;

a screening unit 320, configured to screen an engine in a stable operating state from the plurality of engines according to the rotation speed, the exhaust temperature and the torque;

A calculation unit 330, configured to calculate a first judgment coefficient value corresponding to the engine in a stable operation state, wherein the first judgment coefficient value is calculated based on an exhaust temperature of the corresponding engine and an intake pressure value obtained according to the absolute pressure value after intercooling;

A matching unit 340 is used to match the rotation speed of the target engine in a stable operation state with a plurality of preset rotation speed ranges to determine a target preset rotation speed range in which the rotation speed of the target engine is located, each preset rotation speed range having a corresponding second determination coefficient value;

The judgment unit 350 is used to determine whether a fault occurs in the intake system of the target engine by using a first judgment coefficient value corresponding to the target engine and a second judgment coefficient value corresponding to the target preset speed range.

In an implementation of the embodiment of the present application, the judgment unit determines whether a fault occurs in the intake system of the target engine using the first judgment coefficient value corresponding to the target engine and the second judgment coefficient value corresponding to the target preset speed range, specifically including:

When the first judgment coefficient value is greater than or equal to the second judgment coefficient value corresponding to the first preset speed range, it is determined that a fault occurs in the intake system of the target engine.

In one implementation of the embodiment of the present application, the device further includes:

The fault cause determination unit is used to determine the fault cause of the intake system by using the first determination coefficient value and a preset determination coefficient threshold.

In an implementation of the embodiment of the present application, the fault cause judgment unit is specifically configured to, when the first judgment coefficient value is greater than or equal to the preset judgment coefficient threshold value, judge that the intake system has an air filter blockage or leakage fault;

When the first judgment coefficient value is less than the preset judgment coefficient threshold, the judgment result is that the intake system has a supercharger abnormal fault.

In an implementation of the embodiment of the present application, the screening unit is specifically used to obtain a speed difference value of the engine within a first preset time period, and compare the speed difference value with a preset speed difference value;

Acquire an average torque value of the engine within a second preset time period, and compare the average torque value with a preset average torque value;

Obtaining an average exhaust temperature of the engine within a second preset time period, and comparing the average exhaust temperature with a preset average exhaust temperature;

Acquire an exhaust temperature difference of the engine within a first preset time period, and compare the exhaust temperature difference with a preset exhaust temperature difference;

Engines that satisfy the conditions that the speed difference is less than or equal to the preset speed difference, the torque average is less than the preset torque average, the exhaust temperature average is less than the preset exhaust temperature average, and the exhaust temperature difference is less than the preset exhaust temperature difference are selected as engines in a stable operating state.

The embodiments of the present application also provide corresponding devices and computer storage media for implementing the solutions provided by the embodiments of the present application.

The device includes a memory and a processor, the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes so that the device executes the method described in any embodiment of the present application.

The computer storage medium stores codes, and when the codes are executed, a device executing the codes implements the method described in any embodiment of the present application.

Through the description of the above implementation methods, it can be known that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus a general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a read-only memory (ROM)/RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network communication device such as a router) to execute the methods described in each embodiment of the present application or some parts of the embodiments.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

It should also be noted that the various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device and apparatus embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiments. The device and apparatus embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components indicated as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (10)

1. An intake system failure determination method, characterized in that the method comprises:

Acquiring operation data of a plurality of engines, wherein the operation data comprises rotating speed, exhaust temperature, torque and intercooling absolute pressure value;

Selecting an engine in a steady operation state from the plurality of engines according to the rotational speed, the exhaust temperature and the torque;

calculating a first judgment coefficient value corresponding to the engine in a stable running state, wherein the first judgment coefficient value is calculated based on the exhaust temperature of the corresponding engine and an air inlet pressure value obtained according to the inter-cooling absolute pressure value;

For a target engine in a stable running state, matching the rotating speed of the target engine with a plurality of preset rotating speed ranges, and determining a target preset rotating speed range in which the rotating speed of the target engine is positioned, wherein each preset rotating speed range is provided with a corresponding second judgment coefficient value;

and determining whether the air inlet system of the target engine is faulty or not by using the first judgment coefficient value corresponding to the target engine and the second judgment coefficient value corresponding to the target preset rotating speed range.

2. The method of claim 1, wherein determining whether the intake system of the target engine is malfunctioning using the first determination coefficient value corresponding to the target engine and the second determination coefficient value corresponding to the target preset speed range comprises:

And when the first judgment coefficient value corresponding to the target engine is larger than or equal to the second judgment coefficient value corresponding to the target preset rotating speed range, determining that the air inlet system of the target engine fails.

3. The method according to claim 1, wherein the method further comprises:

and judging the fault reason of the air inlet system by using the first judgment coefficient value and a preset judgment coefficient threshold value.

4. The method of claim 3, wherein said determining a cause of a fault in the air intake system using the first determination coefficient value and a preset determination coefficient threshold value comprises:

When the first judgment coefficient value is larger than or equal to the preset judgment coefficient threshold value, judging that the air inlet system belongs to air filter element blockage or air leakage fault;

When the first judgment coefficient value is smaller than the preset judgment coefficient threshold value, the judgment result is that the air inlet system belongs to the abnormal fault of the supercharger.

5. The method of claim 1, wherein said selecting an engine from said plurality of engines that is in a steady state operation based on said rotational speed, said exhaust temperature, and said torque comprises:

acquiring a rotating speed difference value of an engine in a first preset time period, and comparing the rotating speed difference value with a preset rotating speed difference value;

acquiring a torque average value of the engine in a second preset time period, and comparing the torque average value with a preset torque average value;

Obtaining an exhaust temperature average value of the engine in a second preset time period, and comparing the exhaust temperature average value with a preset exhaust temperature average value;

acquiring an exhaust temperature difference of an engine in a first preset time period, and comparing the exhaust temperature difference with a preset exhaust temperature difference;

And screening out the engine which meets the condition that the rotating speed difference value is smaller than or equal to a preset rotating speed difference value, the torque average value is smaller than the preset torque average value, the exhaust temperature average value is smaller than the preset exhaust temperature average value and the exhaust temperature difference value is smaller than the preset exhaust temperature difference value, and taking the engine as the engine in a stable running state.

6. An intake system failure determination apparatus, characterized by comprising:

The system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit acquires operation data of a plurality of engines, and the operation data comprises a rotating speed, an exhaust temperature, a torque and an inter-cooling absolute pressure value;

a screening unit configured to screen an engine in a steady operation state from among the plurality of engines, based on the rotation speed, the exhaust temperature, and the torque;

A calculating unit, configured to calculate a first judgment coefficient value corresponding to the engine in a steady operation state, where the first judgment coefficient value is calculated based on an exhaust temperature of the corresponding engine and an intake pressure value obtained according to the inter-cooling absolute pressure value;

The matching unit is used for matching the rotating speed of the target engine with a plurality of preset rotating speed ranges for the target engine in a stable running state, determining a target preset rotating speed range in which the rotating speed of the target engine is positioned, wherein each preset rotating speed range is provided with a corresponding second judgment coefficient value;

And the judging unit is used for determining whether the air inlet system of the target engine is faulty or not by utilizing the first judging coefficient value corresponding to the target engine and the second judging coefficient value corresponding to the target preset rotating speed range.

7. The apparatus according to claim 6, wherein the determining unit determining whether the intake system of the target engine has failed using a first determination coefficient value corresponding to the target engine and a second determination coefficient value corresponding to the target preset rotation speed range includes:

And when the first judgment coefficient value corresponding to the target engine is larger than or equal to the second judgment coefficient value corresponding to the target preset rotating speed range, determining that the air inlet system of the target engine fails.

8. The apparatus of claim 6, wherein the apparatus further comprises:

And the fault cause judging unit is used for judging the fault cause of the air inlet system by utilizing the first judgment coefficient value and a preset judgment coefficient threshold value.

9. A computing device, the computing device comprising: a memory, a processor;

The memory is used for storing a computer program;

The processor being adapted to implement the method of any one of claims 1 to 5 when executing the computer program.

10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the method according to any of claims 1 to 5.