Document ID: chunk:federal_register_of_legislation:F2017C01153:front:0:p23
Version: federal_register_of_legislation:F2017C01153
Segment Type: other
Provision Reference: 
Character Range: 69282–72296

on a high friction surface - as specified in paragraph 1.1.1.         9.3.
       b. Stops on a low friction surface - as specified in paragraph 1.1.2.          9.4.
       c. Wheel lock checks on high and low friction surfaces.                        9.5.
       d. Wheel lock check - high to low friction surface transition.                 9.6.
       e. Wheel lock check - low to high friction surface transition.                 9.7.
       f. Stops with an ABS electrical failure.                                       9.8.

       9.2. Vehicle condition:

        (a) Lightly loaded;

        (b) Engine disconnected.

       9.3. Stops on a high friction surface:

       9.3.1. Test conditions and procedure:

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

            (b) Test speed: 60 km/h or 0.9 Vmax, whichever is lower;

            (c) Brake application:

             Simultaneous actuation of both service brake system controls, if so equipped, or of the single service brake control in the case of a service brake system that operates on all wheels;

            (d) Brake actuation force:

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

            (e) If one wheel is not equipped with ABS, the control for the service brake on that wheel shall be actuated with a force that is lower than the force that will cause the wheel to lock;

            (f) Number of stops: until the vehicle meets the performance requirements, with a maximum of 6 stops;

            (g) For each stop, accelerate the vehicle to the test speed and then actuate the brake control under the conditions specified in this paragraph;

       9.3.2. Performance requirements

        When the brakes are tested in accordance with the test procedures referred to in paragraph 9.3.1.:

            (a) The stopping distance (S) shall be  ≤ 0.0063V2  (where V is the specified test speed in km/h and S is the required stopping distance in metres) or the MFDD shall be ≥ 6.17 m/s2; and

            (b) There shall be no wheel lock and the vehicle wheels shall stay within the test lane.

       9.4. Stops on a low friction surface:

       9.4.1. Test conditions and procedure:

        As set out in paragraph 9.3.1., but using the low friction surface instead of the high friction one;

       9.4.2. Performance requirements

        When the brakes are tested in accordance with the test procedures set out in paragraph 9.4.1.:

            (a) The stopping distance (S) shall be  ≤  0.0056V2/P  (where V is the specified test speed in km/h, P is the peak braking coefficient and S is the required stopping distance in metres) or the MFDD shall be  ≥  6.87 x P, in m/s2; and

            (b) There shall be no wheel lock and the vehicle wheels shall stay within the test lane.

       9.5. Wheel lock checks on high and low friction surfaces:

       9.5.1. Test conditions and procedure:

            (a)