Document ID: chunk:federal_register_of_legislation:F2017C01153:front:0:p20
Version: federal_register_of_legislation:F2017C01153
Segment Type: other
Provision Reference: 
Character Range: 60879–63934

The vehicle is ridden at the test speed used in the baseline test set out in paragraph 6.3. with the water spray equipment operating on the brake(s) to be tested and with no application of the brake system;

            (b) After a distance of ≥ 500 m, apply the averaged brake control force determined in the baseline test for the brake system being tested;

            (c) Measure the average vehicle deceleration in the period 0.5 to 1.0 seconds after the point of actuation of the brake control;
            (d) Measure the maximum vehicle deceleration during the complete stop but excluding the final 0.5 seconds.

       6.5. Performance requirements

        When the brakes are tested in accordance with the test procedure set out in paragraph 6.4.1., the wet brake deceleration performance shall be:

            (a) The value measured in paragraph 6.4.1.(c) ≥  60 per cent of the averaged deceleration values recorded in the baseline test in paragraph 6.3.1.(a)(ii), i.e. in the period 0.5 to 1.0 seconds after the point of application of the brake control; and

            (b) The value measured in 6.4.1.(d) ≤  120 per cent of the averaged deceleration values recorded in the baseline test 6.3.1.(a)(iii), i.e. during the complete stop but excluding the final 0.5 seconds.

       7. Heat fade test

       7.1. General:

            (a) The test comprises three parts that are carried out consecutively for each brake system:

                (i) A baseline test using the dry stop test - single brake control actuated (section 3. of this annex);

                (ii) A heating procedure which consists of a series of repeated stops in order to heat the brake(s);

                (iii) A hot brake stop using the dry stop test - single brake control actuated (section 3 of this annex), to measure the brake's performance after the heating procedure;

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

            (c) The test is not applicable to parking brake systems and secondary service brake systems;

            (d) All stops are carried out with the vehicle laden;

            (e) The heating procedure requires the vehicle to be fitted with instrumentation that gives a continuous recording of brake control force and vehicle deceleration.  The MFDD and stopping distance measurements are not appropriate for 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