CN201156014Y - A Static Test Bench for Vehicle Stability Control System - Google Patents

Abstract

A static testing test bench for an automotive electronic stability control system includes a bench, an operating table fixed on the front upper part of the bench, a fixture for an object to be tested installed on the operating table, a hydraulic control part, and an electronic control part. The static detection test bench can not only detect the performance parameters of the hydraulic actuator assembly and the valve body assembly of the electronic stability control system, but also detect the functions and dynamic response characteristics of the key components inside the electronic stability control system, shortening the electronic stability control system. The development cycle saves testing costs during the development process.

Description

A Static Test Bench for Vehicle Stability Control System

technical field

The utility model relates to a test device for an automobile stability control system, in particular to a static detection test bench for the automobile stability control system.

Background technique

The automotive electronic stability control system belongs to the field of automotive safety control and is an active safety control system. The automotive electronic stability control system consists of three parts: hydraulic actuators, electronic control units and sensors. Today, as automobile safety is becoming more and more important, the electronic stability control system has become more complex in structure and more optimized in function, so that researchers need to conduct detailed tests in the early stage of its development to test each aspect of the electronic stability control system of the automobile. Components, especially key components of hydraulic actuators, are evaluated for performance.

At present, most of the domestic test benches can only test the dynamic performance of the whole vehicle installed with the electronic stability control system, and then indirectly determine whether the electronic stability control system is working normally. The disadvantage of using this kind of test bench in the development process of the vehicle stability control system is that it is impossible to directly obtain the performance parameters of the internal components of the electronic stability control system to judge whether the designed components meet the requirements of the electronic stability control system; The performance and reliability are still unknown, so there is a certain risk; the repeatability of the actual vehicle test is poor, and it is expensive.

The detection device and detection method of the internal parameters of the automotive electronic stability control system are rarely mentioned in the relevant literature. Chinese patent announcement number CN2837814Y, published on November 15, 2006, discloses an ABS performance test device, which detects the pressure change of the ABS valve body assembly inlet and outlet during braking, thereby obtaining the ABS valve body assembly The sealing characteristics, boosting characteristics, decompression characteristics and response time of the test device are beneficial to the development of the electronic stability control system to a certain extent, but it is still unable to detect the performance parameters of the key components inside the hydraulic actuator of the electronic stability control system. Chinese Patent Announcement No. CN1948937A, published on April 8, 2007, discloses a hardware-in-the-loop test bench for the electronic stability control system of a car. The hardware of the electronic stability control system is tested in the loop. It only tests the electronic control unit of the electronic stability control system and the valve body assembly of the hydraulic actuator, and cannot directly test the performance parameters of the key components inside the valve body assembly.

Contents of the invention

The purpose of the utility model is to overcome the disadvantage that the existing automobile test bench cannot directly detect the internal performance parameters of the electronic stability control system, and provide a static detection test bench and a detection method that can quickly and accurately measure the internal performance parameters of the electronic stability control system.

The technical scheme of the utility model is as follows:

The static detection test bench provided by the utility model includes a stand, an operation table fixed on the front upper part of the test stand, a clamp for the object to be tested installed on the operation table, a hydraulic control part and an electronic control part. The hydraulic control part includes motor 1, oil tank 3, oil pump 2, pressure regulating circuit 10 fixed at the rear of the test bench, brake pedal assembly 7, vacuum booster assembly 8, brake pedal assembly fixed at the front and lower part of the test bench Master cylinder assembly 9, brake wheel cylinder assembly 6; electronic control part includes pressure sensor 5 fixed on the oil outlet of brake master cylinder 9, pressure sensor 5 fixed on the oil inlet of brake wheel cylinder 6, fixed on The pressure sensor 5 on the pressure output port of the pressure regulation circuit 10, the flow sensor 4 and the pressure sensor 5 fixed in the pressure regulation circuit 10, the circuit control board 50 placed in the lower part of the control cabinet, and the graphical software LABVIEW placed in the upper part of the control cabinet The upper computer 40, the synchronous acquisition card 42 and the CAN conversion card 41 installed on the upper computer 40. The pressure sensor 5 fixed on the oil outlet of the brake master cylinder 9, the pressure sensor 5 fixed on the oil inlet of the brake wheel cylinder 6, the pressure sensor 5 fixed on the pressure output port of the pressure regulation circuit 10, the pressure sensor 5 fixed on the pressure regulation circuit 10 The flow sensor 4 and the pressure sensor 5 are connected with the circuit control board 50 through the signal line, the synchronous acquisition card 42 is connected with the circuit control board 50 through the shielded cable, the CAN conversion card 41 is connected with the circuit control board 50 through the CAN bus, and the upper computer 40 It is connected with the circuit control board 50 through the 232 bus.

The pressure regulating circuit 10 of the hydraulic control part is composed of an accumulator, an oil filter, at least one check valve, at least one overflow valve, multiple electromagnetic reversing valves, and at least one flow control valve. The pressure and flow can be flexible according to the test needs adjust. The pressure regulating circuit 10 is equipped with at least one flow sensor 4, and reserves a plurality of pressure output ports, and the corresponding circuit and pressure output ports can be selected according to the actual test requirements; each pressure output port is connected with an electromagnetic reversing valve, and the electromagnetic reversing valve The valve controls the "on" and "off" of the pressure output port connected to it, and a pressure sensor 5 is also installed on each pressure output port. The pressure regulating circuit 10 is fixed together with the motor 1, the oil tank 3 and the oil pump 2 at the rear of the test bench.

The brake pedal assembly 7, vacuum booster assembly 8 and brake master cylinder assembly 9 of the hydraulic control part are connected sequentially, and the two oil outlets of the brake master cylinder 9 are connected to the pressure regulation circuit through the brake pipeline 10, the oil outlet of the brake master cylinder 9 is connected with a pressure sensor 5, and the number of brake wheel cylinders 6 corresponds to the number of oil outlets leading to the wheel brakes from the hydraulic actuators of the electronic stability control system. The oil inlet of the wheel cylinder 6 is connected to the corresponding oil outlet of the hydraulic actuator to be tested through the brake pipeline, and the oil inlet of each brake wheel cylinder 6 is connected with a pressure sensor 5 . The brake pedal assembly 7, the vacuum booster assembly 8, the brake master cylinder assembly 9, and the brake wheel cylinder assembly 6 are fixed at the front lower part of the test bench, which are used to simulate the brake pressure generated when the real vehicle brakes .

The operating platform of the hydraulic control part is a plane fixed on the front upper part of the test bench for installing the fixture of the object 11 to be measured, and its surface roughness Ra reaches at least 0.8 μm.

The upper computer 40 of the electronic control part is a PC or an industrial computer, and the upper computer 40 is equipped with graphical software LABVIEW, which can quickly and efficiently build an electronic test platform to realize data collection and analysis, result display and data storage functions.

The circuit control board 50 of the electronic control part includes two single-chip microcomputers 53 and 57, a signal conditioning circuit 55, a multi-way switch 56, a CAN controller 52, a CAN transceiver 51, a 232 converter 58, and a hydraulic actuator drive circuit 54. External sensor is connected to signal conditioning circuit 55 by signal line, and signal conditioning circuit 55 is connected to multi-way switch 56, synchronous acquisition card 42 and executive mechanism driving circuit 54 by circuit, and multi-way switch 56 is connected to slave microcontroller 57 ports by circuit, two The serial ports of two single-chip microcomputers 53 and 57 are connected to 232 converters 58 through the circuit; Connect to the main single-chip microcomputer 53; the 232 communication ports of the upper computer 40 are connected to the 232 converter 58 through the 232 bus, the CAN conversion card 41 is connected to the CAN transceiver 51 through the CAN bus, and the actuator drive circuit 54 is connected to the hydraulic pressure to be tested through the signal line Executive body 14. The signal from the sensor is output on the synchronous acquisition card 42 through the signal conditioning circuit 55, and utilizes LABVIEW software on the upper computer 40 to carry out data acquisition and analysis, result display and data storage to the signal on the synchronous acquisition card 42; Main microcontroller 53 communicates with upper computer 40 through CAN bus or 232 bus, and communicates with slave microcontroller 57 through 232 bus; sensor signal is imported into slave microcontroller 57 through multi-way switch 56, and passes from microcontroller 57 to master microcontroller 53 through 232 converter 58 Or upper computer 40; The control instruction of main single-chip microcomputer 53 is output on the electromagnetic valve coil of the hydraulic actuator to be tested or the pump starting motor by hydraulic actuator drive circuit 54; The control instruction of upper computer 40 passes through synchronous acquisition card 42 through signal conditioning circuit 55 is output to the hydraulic actuator drive circuit 54, and then applied to the solenoid valve coil of the hydraulic actuator to be tested or the pump start motor, so that the hydraulic actuator produces corresponding actions.

The hydraulic actuator driving circuit 54 on the circuit control board 50 is driven by a high-power MOSFET.

The functions that can be realized by the static detection test bench are as follows:

(1) Detect the pressure resistance and sealing characteristics of the solenoid valve spool and plunger pump in the hydraulic actuator of the electronic stability control system.

(2) Detect the pressure resistance characteristics, sealing characteristics, boost characteristics, decompression characteristics and response time of the valve body assembly of the hydraulic actuator.

(3) Detect the pressurization characteristics, decompression characteristics and frequency response characteristics of the hydraulic actuator in the four working modes of the electronic stability control system: conventional braking mode, braking anti-lock mode, driving anti-skid mode and stability control mode.

(4) Detect the response time and response characteristics of the solenoid valve coil and the pump starting motor in the hydraulic actuator.

(5) Detect the response characteristics of the pressure sensor, steering wheel angle sensor, wheel speed sensor, longitudinal acceleration sensor, lateral acceleration sensor, and yaw rate sensor.

Corresponding fixtures and driving mechanisms are installed on the static detection bench, and the response characteristic test can be performed on these objects to be measured.

The static detection test bench can deeply detect and analyze the function and response speed of the key components inside the hydraulic actuator of the automotive electronic stability control system, the solenoid valve spool, the plunger pump, the pump starter motor, the solenoid valve coil, and the valve body assembly , which can simulate the dynamic response characteristics of the hydraulic actuator in the four working modes of the electronic stability control system: conventional braking mode, brake anti-lock mode, driving anti-skid mode and stability control mode. The hydraulic actuator creates favorable and sufficient test conditions, thus taking a key step in the development process of the electronic stability control system, providing reliable reference data for the control strategy and control algorithm selection of the automotive electronic stability control system, and shortening the development cycle , to increase the reliability and safety in the early research and development process. The static detection test bench can also be used as maintenance equipment for the hydraulic actuator of the electronic stability control system, providing effective detection means for the fault diagnosis and maintenance of the electronic stability control system of the vehicle.

Due to the adoption of a flexible hydraulic circuit with adjustable pressure and flow and a high-precision synchronous acquisition card 42, the static detection test bench of the automotive electronic stability control system has various functions, stable performance, strong anti-interference ability, and data It has the advantages of fast acquisition speed, high measurement accuracy, and high real-time performance of the system. In addition, its adaptability is also very good. It can be adapted to different types of ABS and electronic stability control systems only by changing the corresponding fixtures. It can greatly save test costs and greatly Shorten the development cycle.

Description of drawings

Fig. 1 Schematic diagram of hydraulic control part;

Figure 2 Schematic diagram of the electronic control part;

Fig. 3 Schematic diagram of single spool detection method of hydraulic actuator;

Figure 4 Schematic diagram of the detection method of the valve body assembly of the hydraulic actuator;

Figure 5 is a schematic diagram of the testing method of the hydraulic actuator assembly.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

The static detection test bench provided by the utility model includes a stand, an operation table fixed on the front upper part of the test stand, a clamp for the object to be tested installed on the operation table, a hydraulic control part and an electronic control part.

The schematic diagram of the hydraulic control part is shown in Figure 1. The hydraulic pressure source is provided by the oil tank 3, the motor 1 and the oil pump 2, and the brake fluid used in the actual vehicle is used for the hydraulic oil, simulating the real situation as much as possible. Valve, electromagnetic reversing valve, flow control valve, the pressure and flow can be flexibly adjusted according to the test needs. The pressure regulating circuit 10 is equipped with a flow sensor 4 and a pressure sensor 5. The pressure regulating circuit 10 reserves a plurality of pressure output ports, and the corresponding circuit and pressure output port can be selected according to the actual test requirements; each pressure output port is connected to an electromagnetic converter. The electromagnetic reversing valve controls the "on" and "off" of the pressure output port connected to it, and each pressure output port is also equipped with a pressure sensor 5. The brake pedal assembly 7, the vacuum booster assembly 8 and the brake master cylinder assembly 9 are sequentially connected, and the two oil outlets of the brake master cylinder 9 are connected to the pressure regulating circuit 10 through the brake pipeline, and the system The oil outlet of moving master cylinder 9 is connected with a pressure sensor 5 . The number of brake wheel cylinders 6 corresponds to the number of oil outlets leading to the wheel brakes from the hydraulic actuators of the electronic stability control system. The oil inlet of each brake wheel cylinder 6 is connected to the corresponding oil outlet of the hydraulic actuator to be tested through the brake pipeline, and the oil inlet of each brake wheel cylinder 6 is connected with a pressure sensor 5 . The hydraulic control part can not only meet the needs of simultaneous measurement of multiple spools, multiple plunger pumps or two valve body assemblies, but also simulate the electronic stability control system in the conventional braking mode, braking anti-lock mode, drive anti-skid Dynamic response of hydraulic actuators in four working modes of mode and stability control mode.

The schematic diagram of the electronic control part is shown in Fig. 2, and the circuit control board 50 is inside the dotted line box, which includes two single-chip microcomputers, a signal conditioning circuit 55, a multi-way switch 56, a CAN controller 52, a CAN transceiver 51, and a 232 converter 58. The driving circuit 54 of the hydraulic actuator. The circuit control board 50 adopts two single-chip microcomputers, and the master and slave single-chip microcomputers run simultaneously, which greatly improves the operating speed and efficiency of the detection system. Wherein from single-chip microcomputer 57 built-in A/D conversion, sensor signal, circuit control board 50 internal circuit signals pass through the signal conditioning circuit 55 and multi-way switch 56 of circuit control board 50, the slave single-chip microcomputer 57 port of incoming circuit control board 50, by Carry out A/D conversion and preliminary calculation from single-chip microcomputer 57 and pass to main single-chip microcomputer 53 or host computer 40 by 232 converters 58 again, carry out data processing by main single-chip microcomputer 53, main single-chip microcomputer 53 passes the result to upper computer 40 by 232 bus again, On the upper computer 40, the revolutionary graphical software LABVIEW of NI Company is used for analysis, display and storage. The control command of the main single-chip microcomputer 53 is transmitted to the actuator driving circuit 54, and the driving circuit drives the solenoid valve coil and the pump starting motor of the hydraulic actuator of the electronic stability control system to make the hydraulic actuator produce corresponding actions; the main single-chip microcomputer 53 passes the CAN controller 52. The CAN transceiver 51 communicates with the host computer 40 through the CAN bus.

PC or industrial computer can be selected as the upper computer 40. According to the high real-time requirements of the electronic stability control system, we have preferentially selected the PXI industrial computer, high-speed synchronous data acquisition card and high-speed CAN conversion card 41 of NI Company, data acquisition card and high-speed The CAN conversion card 41 is installed on the PXI industrial computer, and the data acquisition card is connected to the signal interface card through a shielded cable, which has high anti-interference ability. The signal interface card is connected to the signal conditioning circuit 55 on the circuit control board 50 . The high-speed CAN conversion card 41 is connected to the CAN transceiver 51 of the circuit control board 50 through the high-speed CAN bus, and the PXI industrial computer communicates with the circuit control board 50 through the CAN bus. With the help of NI’s revolutionary graphical software LABVIEW on the host computer 40, an electronic test platform can be built quickly and efficiently, and the functions of synchronous acquisition of digital or analog signals, data analysis and processing, result display and data storage can be realized. Signals such as pressure sensor 5, flow sensor 4, steering wheel angle sensor 72, wheel speed sensor 71, yaw rate/acceleration sensor 73 are passed into multi-channel synchronous acquisition card 42 through the signal conditioning circuit 55 of circuit control board 50, and industrial computer is to synchronous The signal on the acquisition card 42 is used for data collection, and the collected data is analyzed and processed, displayed in real time on the display screen of the upper computer 40, and the collected test data is stored. The control command of the upper computer 40 is transmitted to the actuator drive circuit 54 through the synchronous acquisition card 42, and the drive circuit drives the solenoid valve coil and the pump start motor of the hydraulic actuator of the electronic stability control system to make the hydraulic actuator produce corresponding actions. The hydraulic actuator drive circuit 54 on the circuit control board 50 is driven by a high-power MOSFET, because of its high rated operating current and high reliability, and the high-power MOSFET simplifies the actuator drive circuit and requires fewer electronic components.

The structure of the static detection test bench is arranged separately according to the test bench and the control cabinet, the oil tank 3, the motor 1, the oil pump 2, the oil filter, the accumulator, the check valve, the overflow valve, the electromagnetic reversing valve, the flow control The valve, pressure sensor 5, and flow sensor 4 are all installed in the box of the test bench, in which the motor 1, fuel tank 3, accumulator, oil pump 2, and oil filter are placed in the lower part of the box, and the check valve and overflow valve , electromagnetic reversing valve, flow control valve, pressure sensor 5, and flow sensor 4 are placed on the rear upper part of the box body; an operating table is placed on the front upper part of the box body, and the object to be measured and the fixture are installed on the operating table. The brake pedal assembly 7, the vacuum booster assembly 8, the brake master cylinder assembly 9, and the brake wheel cylinder assembly 6 are fixed on the front lower part of the test bench of the box body. A work surface is placed on the top of the control cabinet, and the display screen and keyboard of the upper computer 40 are placed on the work surface, and the main frame and the circuit control board 50 of the upper computer 40 are placed on the lower part of the control cabinet.

The static detection test bench can simulate the response characteristics of the hydraulic actuator in the four working modes of the electronic stability control system in the conventional braking mode, the braking anti-lock mode, the driving anti-skid mode and the stability control mode, and can deeply detect and Analyze the function and response speed of the internal components of the automotive electronic stability control system, especially the key components of the hydraulic actuator, and then study the response law of each link of the automotive electronic stability control system, providing direct support for the development and simulation of the automotive electronic stability control system The test data provide reliable reference data for the control strategy and control algorithm selection of the automotive electronic stability control system, shorten the development cycle, increase the reliability and safety in the early research and development process, and provide support for the fault diagnosis and maintenance of the automotive electronic stability control system Maintenance provides an effective means of detection.

The specific implementation of the static detection test bench will be described below in conjunction with an automotive electronic stability control system containing two oil inlets, four oil outlets, twelve solenoid valves, two plunger pumps and a pump starter motor.

1. Detection of hydraulic actuators in automotive electronic stability control systems

(1) Detection of single spool and single plunger pump

The solenoid valve core and fixture are installed on the operating table of the test bench. The pipeline connection method is shown in Figure 3. The oil inlet port of the single valve core 12 is connected to a pressure output port of the pressure regulating circuit 10, and the oil outlet port is connected to on the other pressure outlet.

The test method for the pressure resistance performance of the single spool is as follows: the two pressure output ports connected with the oil inlet and outlet ports of the single spool 12 are opened, and the oil pump 2 of the test bench is started. The pressure regulating circuit 10 applies a specified withstand pressure value to the oil inlet and outlet of the single spool 12 at a rate of 2% per second, and maintains the specified pressure value after reaching it. If the specified withstand voltage value or the specified holding time is not reached, the test bench detection system will alarm.

The testing method for the sealing performance of the single spool is as follows: the two pressure output ports connected to the oil inlet and outlet ports of the single spool 12 are opened, the pressure of the pressure regulation circuit 10 is set at the specified pressure value, and the oil pump 2 of the test bench is started until the system pressure is stable. Then close the two pressure output ports communicated with the oil inlet and outlet ports of the single spool 12, at this moment the pressure value of the oil inlet and outlet ports of the single spool 12 starts to change until the pressure value drops to a prescribed percentage. If the pressure value drops to the specified percentage without reaching the specified time, the test bench detection system will alarm.

The detection method of the dynamic response characteristic of the single spool is as follows: start the oil pump 2 of the detection platform, open the two pressure output ports connected with the oil inlet and outlet of the single spool 12, and the detection system starts data collection, and first energizes the electromagnetic coil of the single spool 12 , collect the signal of the pressure sensor 5 at the oil inlet and outlet of the single spool 12, and obtain the pressure change curve of the single spool 12 during the boosting process; then power off the electromagnetic coil of the single spool 12, and collect the oil inlet and outlet of the single spool The signal of the pressure sensor 5 at the position is used to obtain the pressure change curve of the single spool 12 during the decompression process. At the same time, the detection system analyzes and processes the collected signals to obtain the response time, boosting characteristic curve and decompression characteristic curve of the single spool 12, and displays the processing results on the display screen of the host computer 40 and stores the collected results.

The installation method and test method of the single plunger pump are similar to the detection of the single spool, and will not be repeated here.

(2) Inspection of valve body assembly

The valve body assembly and fixtures are installed on the operating table of the test bench. The pipeline connection method is shown in Figure 4. The two oil inlet ports of the valve body assembly 13 are respectively connected to the two pressure output ports of the pressure regulating circuit 10. , the four oil outlets are respectively connected to the four pressure output ports.

The testing method of the pressure resistance performance of the valve body assembly is as follows: the six pressure output ports connected with the oil inlet and outlet ports of the valve body assembly 13 are opened, and the oil pump 2 of the test bench is started. The pressure regulation circuit 10 applies a specified withstand pressure value to the oil inlet and outlet of the valve body assembly 13 at a rate of 2% per second, and maintains the specified pressure value after reaching it. If the specified withstand voltage value or the specified holding time is not reached, the test bench detection system will alarm.

The sealing performance testing method of the valve body assembly is as follows: open the six pressure output ports connected with the oil inlet and outlet ports of the valve body assembly 13, set the pressure of the pressure regulating circuit 10 at the specified pressure value, start the oil pump 2 of the test bench until the system pressure Stabilize, then close the six pressure output ports communicated with the oil inlet and outlet ports of the valve body assembly 13, at this time the pressure value of the oil inlet and outlet ports of the valve body assembly 13 begins to change until the pressure value drops to a specified percentage. If the pressure value drops to the specified percentage without reaching the specified time, the test bench detection system will alarm.

The detection method of the dynamic response characteristics of the spool of the valve body assembly is as follows: start the oil pump 2 of the detection platform, open the six pressure output ports connected with the oil inlet and outlet ports of the valve body assembly 13, the detection system starts data collection, and first depress the brake pedal 7. Collect the signal of the pressure sensor 5 at the oil inlet and outlet of the valve body assembly 13 to obtain the pressure change curve of the valve body assembly 13 during the pressurization process; then release the brake pedal 7 to collect the oil in and out of the valve body assembly 13 The signal of the pressure sensor 5 at the port is used to obtain the pressure change curve of the valve body assembly 13 during the decompression process. At the same time, the detection system analyzes and processes the collected signals to obtain the response time, boosting characteristic curve and decompression characteristic curve of the valve body assembly 13, and displays the processing results on the display screen of the upper computer 40 and stores the collected results.

In addition, a single solenoid valve coil or several solenoid valve coils can be energized simultaneously to detect the dynamic response characteristics of the valve body assembly in various situations, which will not be described in detail here.

(3) Inspection of hydraulic actuator assembly

The hydraulic actuator assembly and fixtures are installed on the operating table of the test bench. The pipeline connection method is shown in Figure 5. The two oil inlets of the hydraulic actuator assembly 14 are respectively connected to the pressure output port of the pressure regulating circuit 10. , the four oil outlets are connected to the oil inlets of the four brake wheel cylinders 6 respectively.

The dynamic response characteristic test of the hydraulic actuator assembly is carried out in two steps. The first step is not to apply the brakes, and the brake pedal 7 is not stepped on, to simulate the hydraulic performance of the vehicle electronic stability control system in the drive anti-skid mode and stability control mode. Response characteristics of the mechanism assembly 14; the second step is to implement the brake, and the brake pedal 7 is stepped on to simulate the hydraulic actuator assembly 14 of the electronic stability control system under normal braking conditions and brake anti-lock braking mode. Responsiveness.

The detection method of the first step is as follows: start the oil pump 2 of the detection platform, open the two pressure output ports connected with the oil inlet port of the hydraulic actuator assembly 14, and start data collection by the detection system. In the supercharging stage, each solenoid valve coil is energized to the corresponding solenoid valve coil in the on-off state, and the pressure sensor 5 signal at the inlet and outlet of the hydraulic actuator is collected to obtain the pressure change curve of the hydraulic actuator assembly 14 during the supercharging process; According to the electronic stability control system in the drive anti-skid mode in the decompression stage, each solenoid valve coil is powered on and off, and the corresponding solenoid valve coil is energized, and the pressure sensor 5 signal at the oil inlet and outlet of the hydraulic actuator assembly 14 is collected to obtain the hydraulic actuator. The pressure change curve of the assembly 14 during the decompression process. At the same time, the detection system analyzes and processes the collected signals to obtain the response time, boosting characteristic curve and decompression characteristic curve of the hydraulic actuator assembly 14, and displays the processing results on the display screen of the upper computer 40 and stores the collected results.

The test method for the response characteristics of the hydraulic actuator assembly in the stability control mode is as follows: start the detection platform oil pump 2, open the two pressure output ports connected to the oil inlet port of the hydraulic actuator assembly 14, and the detection system starts data collection. In the stability control mode, the electronic stability control system energizes the corresponding solenoid valve coils in the on-off state of each solenoid valve coil in the boosting stage, collects the pressure sensor 5 signal at the oil inlet and outlet of the hydraulic actuator, and obtains the hydraulic actuator assembly 14 The pressure change curve during the boosting process; according to the on-off status of each solenoid valve coil in the decompression stage of the electronic stability control system in the stability control mode, the corresponding solenoid valve coil is energized, and the oil inlet and outlet ports of the hydraulic actuator assembly 14 are collected. The signal of the pressure sensor 5 at the position is used to obtain the pressure change curve of the hydraulic actuator assembly 14 during the decompression process. At the same time, the detection system analyzes and processes the collected signals to obtain the response time, boosting characteristic curve and decompression characteristic curve of the hydraulic actuator assembly 14, and displays the processing results on the display screen of the upper computer 40 and stores the collected results.

The second step detection method is as follows: start the detection platform oil pump 2, open the two pressure output ports connected with the oil inlet port of the hydraulic actuator assembly 14, the detection system starts data collection, step on the brake pedal 7, and collect the hydraulic actuator in and out The pressure sensor 5 signal at the oil port place obtains the pressure change curve during the pressurization process of the hydraulic actuator assembly 14; then loosen the brake pedal 7 to collect the pressure sensor 5 signal at the oil inlet and outlet of the hydraulic actuator assembly 14, The pressure change curve of the hydraulic actuator assembly 14 during the decompression process is obtained. At the same time, the detection system analyzes and processes the collected signals to obtain the response time, boosting characteristic curve and decompression characteristic curve of the hydraulic actuator assembly 14, and displays the processing results on the display screen of the upper computer 40 and stores the collected results. The above is the dynamic response characteristic test under normal braking mode. The following is the dynamic response characteristic test method under the anti-lock brake mode: start the oil pump 2 of the detection platform, open the two pressure output ports connected with the oil inlet port of the hydraulic actuator assembly 14, the detection system starts to collect data, step on the brake Pedal 7, according to the electronic stability control system in the anti-lock braking mode of the booster stage, each solenoid valve coil is powered on and off, and the corresponding solenoid valve coil is energized, and the pressure sensor 5 signal at the inlet and outlet of the hydraulic actuator is collected. , to obtain the pressure change curve of the hydraulic actuator assembly 14 during the pressurization process; and then according to the electronic stability control system in the decompression phase of the anti-lock braking mode, the corresponding solenoid valve coils are powered on and off, The signal of the pressure sensor 5 at the oil inlet and outlet of the hydraulic actuator assembly 14 is collected to obtain the pressure change curve of the hydraulic actuator assembly 14 during the decompression process. At the same time, the detection system analyzes and processes the collected signals to obtain the response time, boosting characteristic curve and decompression characteristic curve of the hydraulic actuator assembly 14, and displays the processing results on the display screen of the upper computer 40 and stores the collected results.

(4) Detection of the pump starter motor and solenoid valve coil of the hydraulic actuator

By collecting the current and voltage change signals in the pump starting motor and solenoid valve coil of the electronic stability control system in various operating modes, the response time and response characteristic curves of the pump starting motor and solenoid valve coil can be obtained.

2. Detection of sensors in automotive electronic stability control systems

Corresponding fixtures and driving mechanisms are installed on the static testing bench, and the response characteristic test of the pressure sensor 5, the steering wheel angle sensor 72, the wheel speed sensor 71, and the yaw rate/acceleration sensor 73 can be performed. Start the driving mechanism, the detection system starts data collection, and collects the signal changes of the pressure sensor 5, the steering wheel angle sensor 72, the wheel speed sensor 71, and the yaw rate/acceleration sensor 73, and the detection system analyzes and processes the collected signals at the same time, and obtains The response time and response characteristics of the sensor, and the processing result is displayed on the display screen of the upper computer 40, and the collection result is stored.

Claims (5)

1. the static state detecting bedstand of a vehicle steadily control system comprises: stand, be fixed on the operating table surface of stand front upper part, and be installed in the object anchor clamps to be measured on the operating table surface, it is characterized in that, also comprise hydrostatic control part, electronic control part;

Described hydrostatic control partly comprises motor (1), fuel tank (3), oil pump (2), the pressure regulation circuit (10) that is fixed on the test-bed rear portion, is fixed on brake pedal unit (7), vacuum booster assembly (8), brake master cylinder assy (9), the wheel cylinder assembly (6) of the preceding bottom of test-bed;

Described electronic control part comprises the pressure transducer (5) that is fixed on master cylinder (9) oil-out, be fixed on the pressure transducer (5) on wheel cylinder (6) oil-in, be fixed on the pressure transducer (5) on pressure regulation circuit (10) pressure output, be fixed on flow sensor (4) and pressure transducer (5) in the pressure regulation circuit (10), be placed on the circuit control panel (50) of switch board bottom, be placed on switch board top the host computer of software through pictures LABVIEW (40) is housed, be installed in synchronous collecting card (42) and CAN transition card (41) on the host computer (40), flow sensor (4) is connected with circuit control panel (50) by signal wire with pressure transducer (5), synchronous collecting card (42) is connected with circuit control panel (50) by shielded cable, CAN transition card (41) is connected with circuit control panel (50) by the CAN bus, and host computer (40) is connected with circuit control panel (50) by 232 buses.

2. according to the static state detecting bedstand of the described vehicle steadily control system of claim 1, it is characterized in that, the pressure regulation circuit (10) of described hydrostatic control part is by accumulator, oil filter, at least one retaining valve, at least one surplus valve, a plurality of solenoid directional control valves, at least one flowrate control valve is formed, be furnished with at least one flow sensor (4) and at least one pressure transducer (5) in the pressure regulation circuit (10), pressure regulation circuit (10) is reserved a plurality of pressure outputs, each pressure output links to each other with a solenoid directional control valve, and a pressure transducer (5) also is housed on each pressure output.

3. according to the static state detecting bedstand of the described vehicle steadily control system of claim 1, it is characterized in that, the brake pedal unit (7) of described hydrostatic control part, vacuum booster assembly (8) is connected with brake master cylinder assy (9) order, two oil-outs of master cylinder (9) are connected on the pressure regulation circuit (10) by brake piping, the oil-out of master cylinder (9) is connected to a pressure transducer (5), the quantity of wheel cylinder (6) is led to the quantity of the oil-out of wheel drag corresponding to the electronic stabilizing control system hydraulic actuating mechanism, the oil-in of each wheel cylinder (6) is connected on the corresponding oil-out of hydraulic actuating mechanism to be measured by brake piping, and the oil-in of each wheel cylinder (6) all is connected to a pressure transducer (5).

4. according to the static state detecting bedstand of the described vehicle steadily control system of claim 1, it is characterized in that the circuit control panel of described electronic control part (50) comprises two single-chip microcomputers (53) and (57), signal conditioning circuit (55), multi-way switch (56), CAN controller (52), CAN transceiver (51), 232 converters (58), hydraulic actuating mechanism driving circuit (54);

External sensor is connected to signal conditioning circuit (55) by signal wire, signal conditioning circuit (55) is connected to multi-way switch (56) by circuit, synchronous collecting card (42) and topworks's driving circuit (54), multi-way switch (56) is connected to from single-chip microcomputer (57) port by circuit, the serial port of two single-chip microcomputers (53) and (57) is connected to 232 converters (58) by circuit, CAN transceiver (51) is connected to CAN controller (52) by circuit, CAN controller (52) is connected to host scm (53) by circuit, topworks's driving circuit (54) is connected to host scm (53) by circuit, 232 communication ports of host computer (40) are connected to 232 converters (58) by 232 buses, CAN transition card (41) is connected to CAN transceiver (51) by the CAN bus, and topworks's driving circuit (54) is connected to hydraulic actuating mechanism to be measured (14) by signal wire.

5. according to the static state detecting bedstand of the described vehicle steadily control system of claim 4, it is characterized in that the hydraulic actuating mechanism driving circuit (54) on the circuit control panel (50) has adopted high-power MOSFET.

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