Document ID: chunk:federal_register_of_legislation:F2017L01554:body:0:p25
Version: federal_register_of_legislation:F2017L01554
Segment Type: other
Provision Reference: 
Character Range: 74850–78055

the heating procedure.  The baseline test and the hot brake stop require the measurement of either MFDD or the stopping distance.

       7.2. Baseline test

       7.2.1. Vehicle condition:

        (a) Engine disconnected.

       7.2.2. 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:

             Each service brake system control actuated separately;

            (d) Brake actuation force:

             Hand control: ≤  200 N;

             Foot control: ≤  350 N for vehicle categories L3 and L4;
                ≤  500 N for vehicle category L5 and L7;

            (e) Accelerate the vehicle to the test speed, actuate the brake control under the conditions specified and record the control force required to achieve the vehicle braking performance specified in the table to paragraph 3.3. of this annex.

       7.3. Heating procedure

       7.3.1. Vehicle condition:

        (a) Engine transmission:

                (i) From the specified test speed to 50 per cent specified test speed: connected, with the highest appropriate gear selected such that the engine speed remains above the manufacturer's specified idle speed;

                (ii) From 50 per cent specified test speed to standstill: disconnected.

       7.3.2. Test conditions and procedure:

            (a) Initial brake temperature prior to first stop only: ≥  55 °C and ≤  100 °C;

            (b) Test speed:

             Single brake system, front wheel braking only: 100 km/h or 0.7V max, whichever is lower;

             Single brake system, rear wheel braking only: 80 km/h or 0.7V max, whichever is lower;

             CBS or split service brake system:  100 km/h or 0.7V max, whichever is lower;

            (c) Brake application:

             Each service brake system control actuated separately;

            (d) Brake actuation force:

             (i) For the first stop:

                 The constant control force that achieves a vehicle deceleration rate of 3.0 ‑ 3.5 m/s2 while the vehicle is decelerating between 80 per cent and 10 per cent of the specified speed;

                 If the vehicle is unable to achieve the specified vehicle deceleration rate, this stop is carried out to meet the deceleration requirements in the table in paragraph 3.3. of this annex;

             (ii) For the remaining stops:

                     a. The same constant brake control force as used for the first stop;

              b. Number of stops:  10;

              c. Interval between stops:  1000 m;

            (e) Carry out a stop to the conditions specified in this paragraph and then immediately use maximum acceleration to reach the specified speed and maintain that speed until the next stop is made.

       7.4. Hot brake stop

       7.4.1. Test conditions and procedure:

        Perform a single stop under the conditions used in the baseline test (paragraph 7.2.) for the brake system that has been heated during the procedure in accordance with paragraph 7.3.  This stop is carried out within one minute of the completion of the