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T/CSAE 81-2018Performance requirements and bench test methods for energy-regeneration automobile electronic stability control system (English PDF)

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Issued by

China Society of Automotive Engineers

Level / Type

National · Mandatory

Issue date

January 1, 1970

Implementation date

January 1, 1970

Scope

T/CSAE 81-2018 (Performance requirements and bench test methods for energy-regeneration automobile electronic stability control system) is available as an English-translated PDF.

T/CSAE 81-2018 — This standard specifies the basic parameters, requirements and test methods of the energy feedback type vehicle dynamics control system (EESC).

This standard is applicable to the energy feedback type vehicle dynamics control system of various switch valve types for M1 and M2 electric vehicles. Others the type of energy feedback type vehicle dynamics control system can be referred to for execution.

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Document preview — T/CSAE 81-2018

National Standard of the People's Republic of China

Classification: T 40

Issued by: China Society of Automotive Engineers

Foreword
1 Scope
2 Normative references
3 Terms and definitions
3.2 Electronic Braking Force Distribution EBD Electric Brakeforce Distribution
3.3 Hydraulic Control Unit HCU Hydraulic Control Unit
3.4 Low Pressure Accumulator LPA Low Pressure Accumulator
3.5 Return Pump Return Flow Pump
3.6 Return pump motor Motor
3.7 Inlet Valve Inlet Valve
3.8 Outlet Valve Outlet Valve
3.9 Isolation valve separation valve
3.10 Switching valve
3.11 Oil supply valve
3.12 Rated working pressure Rated Working Pressure
3.13 Rated Working Voltage Rated Working Voltage
3.14 Boost time Time of Pressure build-up
3.15 Buck time Time of Pressure decrease
3.16 Boost lag time Lag time of pressure build-up
3.17 Buck time lag time Lag time of pressure decrease
3.18 Electronic Control Unit (ECU) Electrical Control Unit
4 Requirements
4.1 Basic requirements
5 Rated working voltage DC9.5V ~ 16V
6 Working withstand voltage DC18V 1h 100 °C
6.2 Dynamic characteristics test
6.3 Working noise test
6.4 Environmental test

Foreword

This standard is based on GB/T 1.1-2009 "Standardization Work Guide Part 1. Standard Structure and Preparation" Then write.

1 Scope

This standard specifies the basic parameters, requirements and test methods of the energy feedback type vehicle dynamics control system (EESC).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies.

This document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2423.37-2006 Test L. sand dust test GB/T 10125 artificial atmosphere corrosion test - salt spray test GB 10830 Technical conditions for the use of brake fluids for motor vehicles GB 12676 Technical requirements and test methods for brake systems for commercial vehicles and trailers GB/T 13594 Anti-lock braking performance and test method for motor vehicles and trailers GB/T 30038 road vehicle electrical and electronic equipment protection level (IP code) Technical requirements and bench test method for hydraulic electromagnetic regulator of QC/T 1005 automobile anti-lock brake system

3 Terms and definitions

The following terms and definitions apply to this standard, and the terms and definitions referred to in QC/T 1005 apply equally to this standard.

3.1 Energy feedback vehicle dynamics control system EESC Energy-regeneration Electronic Stability Control System

3.2 Electronic Braking Force Distribution EBD Electric Brakeforce Distribution

3.3 Hydraulic Control Unit HCU Hydraulic Control Unit

3.4 Low Pressure Accumulator LPA Low Pressure Accumulator

A storage device used in the EESC assembly to temporarily store brake fluid that is discharged by the wheel (or tends to lock).

3.5 Return Pump Return Flow Pump

Pump element used in the EESC assembly to draw brake fluid from the LPA back to the master cylinder and pump brake fluid from the MPA to the wheel cylinder 2T/CSAE 81 -.2018

3.6 Return pump motor Motor

Motor used to drive the return pump in the EESC assembly

3.7 Inlet Valve Inlet Valve

The solenoid valve used to control the entry of brake fluid into the wheel cylinder in the EESC assembly.

3.8 Outlet Valve Outlet Valve

The solenoid valve used to control the brake fluid discharge wheel cylinder in the EESC assembly.

3.9 Isolation valve separation valve

The solenoid valve used to control the master cylinder brake fluid into the wheel cylinder in the EESC assembly.

3.10 Switching valve

The solenoid valve used to control the master cylinder brake fluid into the pedal simulator in the EESC assembly.

3.11 Oil supply valve

A solenoid valve used to control the opening and closing of the second circuit in the EESC assembly.

3.12 Rated working pressure Rated Working Pressure

Working hydraulic pressure as specified in the EESC actuator assembly technical documentation.

3.13 Rated Working Voltage Rated Working Voltage

The operating voltage specified in the EESC actuator assembly technical documentation.

3.14 Boost time Time of Pressure build-up

Pressurization phase during one braking (with brake pressure as ordinate and time as abscissa), EESC actuator assembly the time it takes for the outlet pressure to rise from 0.1 MPa to 10 MPa.

3.15 Buck time Time of Pressure decrease

The depressurization phase during a braking process (with brake pressure as the ordinate and time as the abscissa), the EESC actuator assembly the time it takes for the outlet pressure to drop from 10 MPa to 1.5 MPa.

3T/CSAE 81 -.2018

3.16 Boost lag time Lag time of pressure build-up

The lag time of the pressure signal and the electrical signal in the first boost step during the step boost process.

3.17 Buck time lag time Lag time of pressure decrease

The hysteresis time of the pressure signal and the electrical signal in the first step-down step during the step-down process.

3.18 Electronic Control Unit (ECU) Electrical Control Unit

4 Requirements

4.1 Basic requirements

The basic parameters are shown in Table 1.

Table 1 Basic parameter requirements

Serial number item parameter value

1 Working medium DOT3 and above synthetic brake fluid

2 Working environment temperature and humidity -40 ° C ~ 120 ° C, the maximum allowable humidity of 95% 3 rated working fluid pressure 12MPa

4 Allows the use of the highest working fluid pressure of 16MPa

5 Rated working voltage DC9.5V ~ 16V

6 Working withstand voltage DC18V 1h 100 °C

4.2 General requirements

4.2.1 The EESC shall meet the requirements of GB 12676.

4.2.2 When EESC is working normally, its performance requirements shall comply with the provisions of GB/T 13594.

4.2.3 The EESC consists of a hydraulic control unit (HCU) and an electronic control unit (ECU).

4.3 Solenoid valve performance requirements

4.3.1 Sealing requirements the sealing of each channel of the tested product shall meet the requirements of Table 2.

4T/CSAE 81 -.2018

Table 2 Sealing requirements

Test project pressure drop (liter) value (MPa) High pressure sealing <= 0.6 Low pressure sealing <= 0.1 Vacuum tightness <= 100×10-6 Pressure tightness <= 0.3 Low pressure accumulator cavity sealing <= 0.1

4.3.2 Dynamic characteristics requirements

4.3.2.1 The ABS dynamic characteristics of the product shall be implemented in accordance with the requirements of 4.5.1, 4.5.2, 4.5.3, 4.5.4 and 4.5.5 of QC/T 1005.

4.3.2.2 The input pressure is (6±0.3) MPa, the pressure of each outlet is (0 ~ 0.02) MPa, the pedal simulator interface pressure the force deviation is not more than 0.2 MPa.

4.3.2.3 Active boosting 600ms, monitor the flow of each output port, the flow value is greater than 3.6mL/s.

4.3.3 Working noise

The working noise of the sample to be tested should be less than 73dB.

4.3.4 Environmental test requirements

4.3.4.1 Low temperature resistance test requirements After the test, the performance of the product to be inspected shall meet the requirements of 4.3.1, 4.3.2, and 4.3.3.

4.3.4.2 Low temperature operation test requirements During the test, the sample shall have no functional damage and other guiding phenomena. After the test, the product performance shall meet the requirements of 4.3.1.

Requirements for 4.3.2.1, 4.3.2.1, 4.3.3 and Table 3.

Table 3 Characteristics and parameter requirements after environmental test

Characteristic parameter technical requirements Boost time (ms) <= 195 Buck time (ms) <= 125 Maximum pressure difference (MPa) <= 6.2 Boost lag time (ms) <= 11 Buck lag time (ms) <= 9 5T/CSAE 81 -.2018

4.3.4.3 High temperature resistance requirements After the test, the performance of the product to be inspected shall meet the requirements of 4.3.1, 4.3.2, and 4.3.3.

4.3.4.4 High temperature operation performance requirements During the test, the sample shall have no functional damage and other guiding phenomena. After the test, the product performance shall meet the requirements of 4.3.1.

Requirements for 4.3.2.1, 4.3.2.1, 4.3.3 and Table 3.

4.3.4.5 Temperature cycle resistance requirements During the test, the sample shall have no functional damage and other guiding phenomena. After the test, the product performance shall meet the requirements of 4.3.1.

Requirements for 4.3.2.1, 4.3.2.1, 4.3.3 and Table 3.

4.3.4.6 Humidity and heat resistance requirements During the test, there shall be no functional damage and other guiding phenomena in the water inside the sample. After the test, the product performance shall be Meet the requirements of 4.3.1, 4.3.2.1, 4.3.2.1, 4.3.3 and Table 3.

4.3.4.7 Waterproof performance requirements After the test, the inside of the sample shall not enter the water and the performance of the tested product shall meet the requirements of 4.3.1, 4.3.2, 4.3.3.

4.3.4.8 Dustproof performance requirements After the test, there shall be no dust inside the sample to enter the sealing area of the test sample and the performance of the tested product shall meet. 4.3.1 4.3.2, 4.3.3 requirements.

4.3.4.9 Liquid compatibility requirements After the test, the sample should meet the following requirements.

a) no liquid shall enter the sealing area of the test sample;

b) EESC assembly has no cracks and deformation;

c) electrical faults are not allowed in the test;

d) The performance requirements of each channel of the sample shall meet the requirements of 4.3.1, 4.3.2, 4.3.3.

4.3.4.10 Liquid immersion requirements After the test, the sample meets the following requirements.

a) no water shall enter the sealing area of the test specimen after the test;

b) There must be no electrical faults during the test;

c) The performance of the product under inspection shall meet the requirements of 4.3.1, 4.3.2, 4.3.3.

4.3.4.11 Salt spray resistance performance requirements After the salt spray test was carried out for 72 hours, no white rust appeared on the surface of the product, and no red rust appeared on the exposed surface of the product after 128 hours.

4.3.5 Strength test requirements

4.3.5.1 Pressure resistance requirements After the pressure resistance test, the sample piece shall have no effect on the damage and deformation of the function, and no external leakage. The sealing performance of the sample should meet the requirements of 4.3.1 Requirements.

4.3.5.2 Vibration resistance requirements During the test, the sample shall be free of functional damage and other anomalies. After the test, the products to be inspected should meet Table 4 and Table 5 requirements.

6T/CSAE 81 -.2018

Table 4 Sealing requirements after vibration durability

Test project pressure drop (liter) value (MPa) High pressure sealing <= 0.7 Low pressure sealing <= 0.18 Vacuum tightness <= 150×10-6 Pressure tightness <= 0.35 Low pressure accumulator cavity sealing performance <= 0.15

Table 5 Dynamic characteristics parameter requirements after vibration endurance

Characteristic parameter technical requirements Boost time (ms) <= 210 Buck time (ms) <= 135 Maximum pressure difference (MPa) <= 6.5 Boost lag time (ms) <= 11 Buck lag time (ms) <= 9

4.3.6 Insulation resistance performance requirements the insulation resistance of the connection plug of the ECU and the metal (body) of the HCU was measured before and after the test, and the resistance was greater than 10 Mohm.

5 test conditions

5.1 Test equipment requirements

5.1.1 Performance test device

5.1.1.1 The ABS regulation performance test equipment of the product shall be implemented in accordance with the requirements of 5.1.1 of QC/T 1005.

5.1.1.2 The test equipment shall control the on-off state and working time of the isolation valve, the switching valve and the pressure regulating valve coil. Working time the control error should be no more than 2%.

5.1.1.3 The test equipment shall be capable of providing a pressure of 0 MPa to 16 MPa, and the control error of the pressure source shall not exceed 2%.

5.1.1.4 Test equipment should be connected to the flow meter at the output port, and the flow rate of the pressure output port should be monitored in real time.

7T/CSAE 81 -.2018

5.1.2 Noise test bench the ambient noise in the noise detection station should be less than 40dB; the pickup of the sound level meter is installed 700mm directly above the sample.

5.1.3 high and low temperature test chamber the error between the actual temperature of the test box and the set temperature shall not exceed 2 °C. The test box shall have a passage connecting the air pipe, the brake pipe and the cable.

It has sealing measures for heat insulation and moisture insulation, and has space for accommodating the durability test device of the gantry.

5.1.4 Salt spray test chamber the salt spray test chamber shall meet the requirements of the neutral salt spray test in GB/T 10125.

5.1.5 constant temperature and humidity test chamber the test chamber can control the temperature range from -40 °C to 120 °C, the error between the actual temperature and the set temperature should not exceed 1 °C, the actual relative humidity the error between the degree and the set relative humidity should not exceed 2%.

5.1.6 Vibration test bench the vibration test rig can perform random vibration, and the total rms indication error of acceleration should not exceed 3%, and the acceleration power spectral density indication value the error should not be greater than 3%.

5.2 Sample requirements

5.2.1.1 The prototype shall be a product manufactured in accordance with a technical document approved by the prescribed procedures.

5.2.1.2 The number of samples and test items should be selected according to Table 6 according to different test purposes.

Table 6 Sample quantity and test items

Test sequence test project Sample number and corresponding test item Sample number and corresponding test item

6.1.2.2 Detect the pressure drop of each channel of the tested product within 5s.

6.1.3 Vacuum tightness test

6.1.3.1 When the sample is in the normal state, the output port is blocked, and the input port starts to vacuum, when the absolute pressure inside the sample reaches at 300 Pa, the vacuum source is turned off and stabilized for 5 s.

6.1.3.2 Detect the pressure rise of each channel of the tested product within 5s.

6.1.4 Pressure sealing test

6.1.4.1 Input the hydraulic pressure of (12±0.5) MPa from the input port of the sample. After the pressure is stabilized, energize the inlet valve, and the outlet valve and the pressure source of the input port is closed when the return pump motor is not energized.

6.1.4.2 Measure the pressure drop of the input and output ports of each channel within 30 s.

Continued

9T/CSAE 81 -.2018

6.1.5 Low-pressure accumulator chamber sealing test

6.1.5.1 The sample outlet valve coil is energized, blocking the output port, and the input port inputs (12±0.5) MPa hydraulic pressure, waiting for pressure Start testing after stabilization.

6.1.5.2 Detect the pressure drop of each channel of the tested product within 5s.

6.2 Dynamic characteristics test

6.2.1.1 The ABS test method in the dynamic characteristic test shall be carried out in accordance with 6.5 of QC/T 1005.

6.2.1.2 First open the switching valve and close the isolation valve, then fill the input port with (6 ± 0.5) MPa oil pressure, test four the pressure at the output port and the pedal simulator interface.

6.2.1.3 The oil supply valve and the isolation valve coil are energized, the motor is energized, and the flow rate of each circuit output port is detected.

6.3 Working noise test

6.3.1.1 Simulating the actual vehicle state installation sample (with mounting bracket and damping pad), control circuit and analog controller or real vehicle controller Connected; installed in the noise detection station.

6.3.1.2 Operation controller, simulating the boosting, holding pressure and depressurization process of conventional braking, the test pressure is (12±0.5) MPa;

Record the working noise of the sample.

6.4 Environmental test

6.4.1 Low temperature resistance test

6.4.1.1 Place the sample in the cryostat at room temperature and place the test piece in the actual vehicle assembly state (or simulate the actual vehicle assembly state).

Gradually reduce the temperature in the low temperature box to (-40 ± 2) °C, so that the sample is kept in a non-energized state (96 ± 2) h in the low temperature chamber.

Remove the sample from the cryostat; leave it at room temperature for more than 2 hours.

6.4.1.2 After the test, the samples shall be tested according to 6.1, 6.2 and 6.3.

6.4.2 Low temperature operation test

6.4.2.1 Place the sample in the cryostat at room temperature and place the test piece in the actual vehicle assembly state (or simulate the actual vehicle assembly state).

Gradually reduce the temperature in the cryostat to -40 ± 2 ° C conditions. Keep the sample energized in the low temperature box (72 ± 2) h, will the sample was taken out of the cryostat; placed at room temperature for more than 2 h.

6.4.2.2 After the test, the samples shall be tested according to 6.1, 6.2 and 6.3.

6.4.3 High temperature resistance test

6.4.3.1 Place the sample in the high temperature box at room temperature and place the test piece in the actual vehicle assembly state (or simulate the actual vehicle assembly state).

Gradually increase the temperature in the high temperature chamber to (120 ± 2) °C, so that the sample is kept in a non-energized state (96 ± 2) h in the high temperature chamber.

Remove the sample from the oven and leave it at room temperature for more than 2 hours.

6.4.3.2 After the test, the samples shall be tested according to 6.1, 6.2 and 6.3.

T/CSAE 81 -.2018

6.4.4 High temperature operation test

6.4.4.1 Place the sample in the high temperature box at room temperature and place the test piece in the actual vehicle assembly state (or simulate the actual vehicle assembly state).

Gradually increase the temperature in the high temperature chamber to 120 ± 2 ° C conditions. Keep the sample in the power state and run it in the high temperature chamber (72±2)h.

Remove the parts from the high temperature chamber; leave at room temperature for more than 2 hours.

6.4.4.2 After the test, the samples shall be tested according to 6.1, 6.2 and 6.3.

6.4.5 Temperature cycle test

6.4.5.1 The product under test is filled with brake fluid, plugging the input port and the output port, and putting the product into a low temperature box with a temperature of -40 °C.

After 2 hours of placement, the product was quickly placed in a 120 ° C high temperature chamber for 2 h, and the intermediate conversion time was between 2 min and 3 min.

6.4.5.2 The above test procedure constitutes a cycle for a total of 50 cycles.

6.4.5.3 After the test, the samples shall be tested according to 6.1, 6.2 and 6.3.

6.4.6 Heat and humidity resistance test

6.4.6.1 Pre-aging treatment according to 6.4.4.1 before test.

6.4.6.2 Place the sample in the hot and humid chamber at room temperature and place the test piece in the actual vehicle assembly state (or simulate the actual vehicle assembly state).

Control the ambient temperature and humidity in the test chamber, change according to the curve of Figure 1, repeat 5 cycles

6.4.6.3 After the test, the samples shall be tested according to 6.1, 6.2 and 6.3.

6.4.7 Waterproof performance test

6.4.7.1 Pre-aging treatment according to 6.4.4 before the test.

6.4.7.2 The waterproof test shall be carried out in accordance with the IPX9k or IPX6 grades specified in GB/T 30038.

6.4.7.3 After the test, the samples shall be tested according to 6.1, 6.2 and 6.3.

6.4.8 Dustproof performance test

6.4.8.1 Pre-aging treatment according to 6.4.4.1 before test.

6.4.8.2 Connect the electrical connector during the test, do not power on, do not monitor the electrical state.

6.4.8.3 The test method shall be carried out in accordance with the requirements of 6.1 of GB/T 2423.37-2006, and the specific test conditions shall be implemented in accordance with Table 7.

6.4.8.4 After the test, the samples shall be tested according to 6.1, 6.2 and 6.3.

Table 7 Dust test method

Test time 2h

Dust specification

33%; less than 32µm

67%; 32µm to 250µm

Dust density (5.0±2.0) g/m3 Test wind speed (1.5 ± 0.2) m/s T/CSAE 81 -.2018

6.4.9 Liquid compatibility test

6.4.9.1 Pre-test according to 6.4.4.1 before the test...

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 14 pages — is available in the English PDF.

Referenced standards

Normative references

GB 10830

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