GB/T 38186-2019Performance requirements and test methods for advanced emergency braking system (AEBS) of commercial vehicles (English PDF)

3.1 Advanced emergency braking system; AEBS

The system which monitors the driving environment in front of the vehicle in real time and automatically starts the vehicle's braking system to slow down the vehicle in the event of a possible collision hazard to avoid collision or mitigate collision.

3.2 Subject vehicle

The vehicle subjected to the AEBS test in accordance with the requirements of this Standard.

3.3 Target

The mass-produced ordinary passenger car having 4 or more seats and 2 or 4 side doors or the representative object of which the detection parameters can represent the above vehicle and which is suitable for AEBS sensing detection features.

3.4 Moving target

The target which moves in the same direction at a constant speed in the center of the same lane ahead of the subject vehicle.

3.5 Stationary target

The target which remains motionless in the center of the same lane ahead of the subject vehicle.

4.1 General requirements

4.1.1 Vehicles equipped with AEBS shall be equipped with an antilock braking system which meets the requirements of GB/T 13594.

4.1.2 The electromagnetic compatibility of AEBS shall meet the requirements of GB 34660-2017.

4.2 Early-warning and warning signals

4.2.1 The AEBS shall be able to provide the driver with the appropriate early-warning and warning signals as follows.

4.2.2 The collision early-warning described in 4.2.1 shall be at least two signal early-warnings of acoustic, tactile, and optical signals. The timing of the early-warning shall be such that the driver can react to the risk of collision, control the vehicle in time, and premature or too frequent early-warnings are avoided to annoy the driver.

4.2.7 When the AEBS is temporarily inoperable due to environmental factors such as inclement weather, if an optical warning signal is provided to the driver, the signal shall be a constant yellow signal. The failure warning signal specified in 4.2.4 may be used.

4.3 Performance requirements

4.3.1 Basic performance

When AEBS is operating normally, it shall meet the following requirements.

4.3.2 Early-warning and startup performance under stationary target conditions

4.3.2.2 The speed decline in the warning phase shall not exceed 15 km/h or 30% of the total speed decline of the test vehicle, whichever is higher.

4.3.2.3 The collision warning phase shall be followed by the emergency braking phase.

4.3.2.4 The total speed decline of the subject vehicle when colliding with a stationary target shall not be less than 10 km/h.

4.3.2.5 The emergency braking phase shall not begin before the time to collision is less than or equal to 3 s.

4.3.3.5 After eliminating driver interference, at least 3 of 5 tests meet the requirements of 4.3.3.1~4.3.3.4.

4.3.2.1 TEST according to 5.4

The time setting of the collision early-warning mode described in 4.2 shall meet the following requirements. […]

4.4 Warning signal after system failure

TEST according to 5.6. The always-on optical warning signal in accordance with GB 4094-2016 shall be started at the latest when the vehicle is driving at a speed of more than 15 km/h for 10 s. As long as the failure still exists, after turning off the ignition switch and restarting it at rest, the vehicle shall maintain its failure warning state.

4.5 Driver intervention performance

4.6 Anti-false response performance

TEST according to 5.8. The AEBS shall not send a collision early-warning and shall not activate the emergency braking function.

5.1 Test conditions

5.1.1 The test environment shall comply with the provisions of 5.1.2 of GB 12676-2014.

5.1.2 The horizontal visual range shall ensure that the target can be observed throughout the test.

5.2 Vehicle conditions

5.3 Test target

5.3.1 The test may adopt an ordinary passenger car or a soft target.

5.3.2 Specific measures to ensure consistency and repeatability of targets shall be documented in detail in the vehicle test report.

5.6 Warning signal after system failure

5.6.1 By disconnecting the power supply of the AEBS component or the electrical connection between the AEBS components, simulate circuit failure.

When simulating AEBS failure, it shall not cut off the circuit connection of the driver warning signal specified in 4.2.1 and the AEBS manual off control device specified in 4.5.

5.7 Driver intervention performance

5.7.1 TEST according to 5.5. In the warning phase, the driver steps on the accelerator pedal, turns on the turn signal, performs other means specified by the manufacturer, to check whether the response of the system can be interrupted by the active action of driver intervention.

5.8 System anti-false response performance

5.8.1 PUT two ordinary passenger cars defined in GB/T 3730.1-2001 as follows.

5.8.2 The subject vehicle, from outside at least 60 m, begins to pass through the middle of two stationary vehicles at a constant speed of (50±2)km/h. Except for slight adjustment of the steering wheel to prevent the vehicle from shifting in direction, during the test, it shall not make any adjustments to the subject vehicle. […]