Document ID: chunk:federal_register_of_legislation:F2017C01153:front:0:p24
Version: federal_register_of_legislation:F2017C01153
Segment Type: other
Provision Reference: 
Character Range: 72040–75161

≥  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) Test surfaces:

             (i) High friction; and

             (ii) Low friction;

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

            (c) Test speed:

                (i) On the high friction surface: 80 km/h or 0.8 Vmax, whichever is lower;

                (ii) On the low friction surface: 60 km/h or 0.8 Vmax, whichever is lower;

            (d) Brake application:

                (i) Each service brake system control actuated separately;

                (ii) Where ABS is fitted to both brake systems, simultaneous actuation 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 cycle fully throughout each stop, down to 10 km/h;

            (f) Brake application rate:

             The brake control actuation force is applied in 0.2 - 0.5 seconds;

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

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

       9.5.2. Performance requirements:

        When the brakes are tested in accordance with the test procedures set out in paragraph 9.5.1., there shall be no wheel lock and the vehicle wheels shall stay within the test lane.

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

       9.6.1. Test conditions and procedure:

            (a) Test surfaces:

             A high friction surface immediately followed by a low friction surface;

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

            (c) Test speed:

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

            (d) Brake application:

                (i) Each service brake system control actuated separately;

                (ii) Where ABS is fitted to both brake systems, simultaneous actuation 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 cycle fully 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