Document ID: chunk:federal_register_of_legislation:F2017C01153:front:0:p19
Version: federal_register_of_legislation:F2017C01153
Segment Type: other
Provision Reference: 
Character Range: 58156–61108

control force and vehicle deceleration.  The MFDD and the stopping distance measurements are not appropriate in this case.

       6.2. Vehicle condition:

        (a) The test is applicable to all vehicle categories;

            (b) Laden:

             For vehicles fitted with CBS and split service brake systems: the vehicle is tested in the lightly loaded condition in addition to the laden condition;

            (c) Engine disconnected;

            (d) Each brake is fitted with water spray equipment:

         (i) Disc brakes: Sketch of water spray equipment:

          The disc brake water spray equipment is installed as follows:

                     a. Water is sprayed onto each brake with a flow rate of 15 litres/hr.  The water is equally distributed on each side of the rotor;

                     b. If the surface of the rotor has any shielding, the spray is applied 45° prior to the shield;

                     c. If it is not possible to locate the spray in the position shown on the sketch, or if the spray coincides with a brake ventilation hole or similar, the spray nozzle may be advanced by an additional 90° maximum from the edge of the pad, using the same radius;

         (ii) Drum brakes with ventilation and open inspection ports:

          The water spray equipment is installed as follows:

                     a. Water is sprayed equally onto both sides of the drum brake assembly (on the stationary back plate and on the rotating drum) with a flow rate of 15 litres/hr;

                     b. The spray nozzles are positioned two thirds of the distance from the outer circumference of the rotating drum to the wheel hub centre;

                     c. The nozzle position is  15 from the edge of any opening in the drum back plate.

       6.3. Baseline test

       6.3.1. Test conditions and procedure:

            (a) The test in section 3. of this annex (dry stop test - single brake control actuated) is carried out for each brake system but with the brake control force that results in a vehicle deceleration of 2.5 – 3.0 m/s2, and the following is determined:

                (i) The average brake control force measured when the vehicle is travelling between 80 per cent and 10 per cent of the specified test speed;

                (ii) The average vehicle deceleration in the period 0.5 to 1.0 seconds after the point of actuation of the brake control;

                (iii) The maximum vehicle deceleration during the complete stop but excluding the final 0.5 seconds;

            (b) Conduct 3 baseline stops and average the values obtained in (i), (ii), and (iii).

       6.4. Wet brake stop

       6.4.1. Test conditions and procedure:

            (a) 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