GB/T 38185-2019 Performance requirements and testing methods for electronic stability control system(ESC)for commercial vehicles, replaced by GB 38185-2026 Performance requirements and testing methods for electronic stability control system (ESC) for heavy-duty vehicles
Performance requirements and testing methods for electronic stability control system (ESC) for commercial vehicles
1 Scope
This standard specifies the terms and definitions, general requirements, performance requirements, test conditions and test methods of electronic stability control system (ESC) for commercial vehicles.
This standard is applicable to M2 vehicles with the maximum design total mass greater than 3,500 kg and M3, N2, N3 vehicles, all of which are equipped with ESC.
Note: ESC as the abbreviation of electronic stability control system is used below.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 12428 Laden mass calculating method for buses
GB/T 12549 Terms and definitions for vehicle controllability and stability
GB 12676-2014 Technical requirements and testing methods for commercial vehicle and trailer braking systems
GB/T 13594-2003 Antilock braking performance and test procedure for motor vehicles and their trailers
GB/T 26987-2011 Road vehicles - Measurement of road surface friction
GB/T 30677 Performance requirements and testing methods for electronic stability control system (ESC) for light vehicles
3 Terms and definitions
For the purposes of this document, the terms and definitions specified in GB/T 12549 and GB/T 30677 and the following apply.
3.1
ESC braking
situation that ESC issues an instruction to apply a brake to any wheel for a period of at least 0.5s and a pressure of at least 34 kPa (pneumatic braking system) or 172 kPa (hydraulic braking system)
4 General requirements
The ESC shall have the following functions:
a) Apply braking torque separately to all wheels according to certain control logic [1) Indirect control wheels and direct control wheels in the same group are regarded as the same wheel.]1);
b) Operate normally in all stages of driving, such as acceleration, coasting and deceleration (including braking), except in the following cases:
1) The driver turns off the ESC;
2) The speed is lower than 20 km/h;
3) The system self-test has been completed and the vehicle is in the driving state specified in 7.8.2 for not more than 2 min;
4) The vehicle is in a back state;
c) The normal operation of the ESC shall not be affected even during the action of the anti-lock braking system (ABS) or the drive anti-skid system (ASR).
5 Performance requirements
5.1 Test of J steering
5.1.1 Test is carried out according to 7.7.2, and the following requirements shall be met at least 2 times in 4 consecutive tests in each series:
a) ESC shall reduce the engine/drive motor output torque by 10% or more than the driver's request torque for at least 0.5s after the vehicle under test enters the test starting point for 1.5s and passes the test ending point;
b) The wheels of the vehicle under test shall remain in the test lane at all times from the beginning of the test to the end of the test.
5.1.2 Test is carried out according to 7.7.3, and the following requirements shall be met at least 6 times in 8 consecutive tests in each series:
a) The speed of the vehicle under test shall not exceed 47 km/h after passing the test starting point for 3s;
b) The speed of the vehicle under test shall not exceed 45 km/h after passing the test starting point for 4s;
c) The wheels of the vehicle under test shall remain in the test lane at all times from the beginning of the test to the end of the test;
d) The ESC braking shall be activated.
5.2 ESC fault monitoring
5.2.1 The vehicle shall be equipped with an ESC signal device and alarm the driver in case of any fault of the system affecting the generation or transmission of ESC control and response signals.
5.2.2 The ESC fault signal device shall meet the following requirements:
a) It shall be at a position in front of the driver, and easy for him or her to inspect the state of the signal device at the driving position;
b) The vehicle during driving shall be in an upright state, and its orientation is shown in Figure 1;
c) It shall be indicated by one of the symbol for "ESC fault signal" or the word "ESC" as shown in Figure 1;
d) It shall be yellow or amber;
e) The signal device shall be bright and eye-catching after being lit so that the driver can clearly observe whether driving in the daytime or at night after adapting to the environmental road lighting conditions;
Figure 1 Symbols of "ESC fault signal"
f) In addition to the requirements of g) below, if any fault occurs, the ESC fault signal device shall be lit; moreover, as long as the ignition system switch is in the "ON" ("RUN") position, the ESC fault signal device shall be kept ON until the fault is eliminated;
g) Except as specified in 5.2.3, the ESC fault signal device shall be lit for functional inspection when the ignition locking system is in the "ON" ("RUN") position but the engine/drive motor is not running or when the ignition locking system is in the
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Performance requirements
6 Test conditions
7 Test methods
Annex A (Informative) Additional tests
GB/T 38185-2019 Performance requirements and testing methods for electronic stability control system(ESC)for commercial vehicles, replaced by GB 38185-2026 Performance requirements and testing methods for electronic stability control system (ESC) for heavy-duty vehicles
Performance requirements and testing methods for electronic stability control system (ESC) for commercial vehicles
1 Scope
This standard specifies the terms and definitions, general requirements, performance requirements, test conditions and test methods of electronic stability control system (ESC) for commercial vehicles.
This standard is applicable to M2 vehicles with the maximum design total mass greater than 3,500 kg and M3, N2, N3 vehicles, all of which are equipped with ESC.
Note: ESC as the abbreviation of electronic stability control system is used below.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 12428 Laden mass calculating method for buses
GB/T 12549 Terms and definitions for vehicle controllability and stability
GB 12676-2014 Technical requirements and testing methods for commercial vehicle and trailer braking systems
GB/T 13594-2003 Antilock braking performance and test procedure for motor vehicles and their trailers
GB/T 26987-2011 Road vehicles - Measurement of road surface friction
GB/T 30677 Performance requirements and testing methods for electronic stability control system (ESC) for light vehicles
3 Terms and definitions
For the purposes of this document, the terms and definitions specified in GB/T 12549 and GB/T 30677 and the following apply.
3.1
ESC braking
situation that ESC issues an instruction to apply a brake to any wheel for a period of at least 0.5s and a pressure of at least 34 kPa (pneumatic braking system) or 172 kPa (hydraulic braking system)
4 General requirements
The ESC shall have the following functions:
a) Apply braking torque separately to all wheels according to certain control logic [1) Indirect control wheels and direct control wheels in the same group are regarded as the same wheel.]1);
b) Operate normally in all stages of driving, such as acceleration, coasting and deceleration (including braking), except in the following cases:
1) The driver turns off the ESC;
2) The speed is lower than 20 km/h;
3) The system self-test has been completed and the vehicle is in the driving state specified in 7.8.2 for not more than 2 min;
4) The vehicle is in a back state;
c) The normal operation of the ESC shall not be affected even during the action of the anti-lock braking system (ABS) or the drive anti-skid system (ASR).
5 Performance requirements
5.1 Test of J steering
5.1.1 Test is carried out according to 7.7.2, and the following requirements shall be met at least 2 times in 4 consecutive tests in each series:
a) ESC shall reduce the engine/drive motor output torque by 10% or more than the driver's request torque for at least 0.5s after the vehicle under test enters the test starting point for 1.5s and passes the test ending point;
b) The wheels of the vehicle under test shall remain in the test lane at all times from the beginning of the test to the end of the test.
5.1.2 Test is carried out according to 7.7.3, and the following requirements shall be met at least 6 times in 8 consecutive tests in each series:
a) The speed of the vehicle under test shall not exceed 47 km/h after passing the test starting point for 3s;
b) The speed of the vehicle under test shall not exceed 45 km/h after passing the test starting point for 4s;
c) The wheels of the vehicle under test shall remain in the test lane at all times from the beginning of the test to the end of the test;
d) The ESC braking shall be activated.
5.2 ESC fault monitoring
5.2.1 The vehicle shall be equipped with an ESC signal device and alarm the driver in case of any fault of the system affecting the generation or transmission of ESC control and response signals.
5.2.2 The ESC fault signal device shall meet the following requirements:
a) It shall be at a position in front of the driver, and easy for him or her to inspect the state of the signal device at the driving position;
b) The vehicle during driving shall be in an upright state, and its orientation is shown in Figure 1;
c) It shall be indicated by one of the symbol for "ESC fault signal" or the word "ESC" as shown in Figure 1;
d) It shall be yellow or amber;
e) The signal device shall be bright and eye-catching after being lit so that the driver can clearly observe whether driving in the daytime or at night after adapting to the environmental road lighting conditions;
Figure 1 Symbols of "ESC fault signal"
f) In addition to the requirements of g) below, if any fault occurs, the ESC fault signal device shall be lit; moreover, as long as the ignition system switch is in the "ON" ("RUN") position, the ESC fault signal device shall be kept ON until the fault is eliminated;
g) Except as specified in 5.2.3, the ESC fault signal device shall be lit for functional inspection when the ignition locking system is in the "ON" ("RUN") position but the engine/drive motor is not running or when the ignition locking system is in the
Contents of GB/T 38185-2019
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Performance requirements
6 Test conditions
7 Test methods
Annex A (Informative) Additional tests
