Document ID: chunk:federal_register_of_legislation:F2017L01554:body:0:p29
Version: federal_register_of_legislation:F2017L01554
Segment Type: other
Provision Reference: 
Character Range: 86181–89240

is necessary to ensure that the ABS will be fully cycling throughout each stop, down to 10 km/h;

            (f) Number of stops:  until the vehicle meets the performance requirements, with a maximum of 3 stops;

            (g) For each stop, accelerate the vehicle to the test speed and then actuate the brake control before the vehicle reaches the transition from one friction surface to the other;

       9.6.2. Performance requirements:

        When the brakes are tested in accordance with the test procedures set out in paragraph 9.6.1., there shall be no wheel lock and the vehicle wheels shall stay within the test lane.

       9.7. Wheel lock check - low to high friction surface transition:

       9.7.1. Test conditions and procedure:

            (a) Test surfaces:

             A low friction surface immediately followed by a high friction surface with a PBC ≥  0.8;

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

            (c) Test speed:

             The speed that will result in 50 km/h or 0.5 Vmax, whichever is lower, at the point where the vehicle passes from the low friction to the high friction surface;

            (d) Brake application:

                (i) Each service brake system control applied separately;

                (ii) Where ABS is fitted to both brake systems, simultaneous application of both brake controls in addition to (i);

            (e) Brake actuation force:

             The force applied is that which is necessary to ensure that the ABS will be fully cycling throughout each stop, down to 10 km/h;

            (f) Number of stops:  until the vehicle meets the performance requirements, with a maximum of 3 stops;

            (g) For each stop, accelerate the vehicle to the test speed and then actuate the brake control before the vehicle reaches the transition from one friction surface to the other;

            (h) Record the vehicle's continuous deceleration;

       9.7.2. Performance requirements:

            (a) When the brakes are tested in accordance with the test procedures set out in paragraph 9.7.1., there shall be no wheel lock and the vehicle wheels shall stay within the test lane;

            (b) Within 1 second of the rear wheel passing the transition point between the low and high friction surfaces, the vehicle deceleration shall increase.

       9.8. Stops with an ABS electrical failure:

       9.8.1. Test conditions and procedure:

            (a) With the ABS electrical system disabled, carry out the test set out in section 3. of this annex, (dry stop test – single brake control actuated) applying the conditions relevant to the brake system and vehicle being tested;

       9.8.2. Performance requirements:

        When the brakes are tested in accordance with the test procedure set out in paragraph 9.8.1.:

            (a) The system shall comply with the failure warning requirements of paragraph 5.1.13. of this Regulation; and

            (b) The minimum requirements for stopping distance or MFDD shall be as specified