Document ID: chunk:federal_register_of_legislation:F2017C01153:front:0:p26
Version: federal_register_of_legislation:F2017C01153
Segment Type: other
Provision Reference: 
Character Range: 77706–81187

table to paragraph 3.3. of this annex.

       10. Partial failure test - for split service brake systems

       10.1. General information:

            (a) The test is only applicable to vehicles that are equipped with split service brake systems;

            (b) The test is to confirm the performance of the remaining subsystem in the event of a hydraulic system leakage failure.

       10.2. Vehicle condition:

            (a) The test is applicable to vehicle categories L3, L5 and L4;

            (b) Lightly loaded;

            (c) Engine disconnected.

           10.3. Test conditions and procedure:

            (a) Initial brake temperature:  ≥  55 °C and ≤  100 °C;

            (b) Test speeds: 50 km/h and 100 km/h or 0.8 Vmax, whichever is lower;

            (c) Brake actuation force:

             Hand control:   ≤  250 N;

             Foot control:     ≤  400 N;

            (d) Number of stops: until the vehicle meets the performance requirements, with a maximum of 6 stops for each test speed;

            (e) Alter the service brake system to induce a complete loss of braking in any one subsystem.  Then, for each stop, accelerate the vehicle to the test speed and then actuate the brake control under the conditions specified in this paragraph;

            (f) Repeat the test for each subsystem.

       10.4. Performance requirements:

            (a) When the brakes are tested in accordance with the test procedure set out in paragraph 10.3.;

            (b) The system shall comply with the failure warning requirements set out in paragraph 5.1.11. of this Regulation; and

            (c) The stopping distance (S) shall be  ≤  0.1 V + 0.0117 V2  (where V is the specified test speed in km/h and S is the required stopping  distance in metres) or the MFDD shall be ≥  3.3 m/s2.

       11. Power-assisted braking system failure test

       11.1. General information:

            (a) The test is not conducted when the vehicle is equipped with another separate service brake system;

            (b) The test is to confirm the performance of the service brake system in the event of failure of the power assistance.

           11.2. Test conditions and procedure:

            (a) Carry out the test set out in section 3. of this annex, (dry stop test – single brake control actuated) for each service brake system with the power assistance disabled.

       11.3. Performance requirements

        When the brakes are tested in accordance with the test procedure set out in paragraph 11.2., the stopping distance shall be as specified in column 2 or the MFDD shall be as specified in column 3 of the following table:

       Column 1                           Column 2                                                                                                            Column 3
       Vehicle                            STOPPING DISTANCE(S)                                                                                                MFDD
       Category                    (Where V is the specified test speed in km/h and S is the required stopping distance in metres)
       Single brake system
       L1                                 S ≤  0.1 V + 0.0143 V2                                                                                              ≥  2.7 m/s2
       L2                                 S ≤  0.1 V + 0.0143 V2                                                                           ≥  2.7m/s2
       L3