Document ID: chunk:federal_register_of_legislation:F2017L01554:body:0:p19
Version: federal_register_of_legislation:F2017L01554
Segment Type: other
Provision Reference: 
Character Range: 55293–58662

vehicle width.

       1.2. Ambient temperature

        The ambient temperature is between 4 °C and 45 °C.

       1.3 Wind speed

        The wind speed is not more than 5 m/s.

       1.4. Test speed tolerance

        The test speed tolerance is ± 5 km/h.

        In the event of the actual test speed deviating from the specified test speed, the actual stopping distance is corrected using the formula in paragraph 5.3.2. of this Regulation.

       1.5. Automatic transmission

        Vehicles with automatic transmission shall complete all tests - whether they are for "engine connected" or "engine disconnected".

        If an automatic transmission has a neutral position, the neutral position is selected for tests where "engine disconnected" is specified.

       1.6. Vehicle position and wheel lock:

            (a) The vehicle is positioned in the centre of the test lane for the beginning of each stop;

            (b) Stops are made without the vehicle wheels passing outside the applicable test lane and without wheel lock.

       1.7. Test sequence

       Test order                                                 Paragraph
    1. Dry stop - single brake control actuated                   3.
    2. Dry stop - all service brake controls actuated             4.
    3. High speed                                                 5.
    4. Wet brake                                                  6.
    5. Heat fade 1/                                               7.
    6. If fitted:
    6.1. Parking brake system                                     8.
    6.2. ABS                                                      9.
    6.3. Partial failure, for split service brake systems         10.
    6.4. Power-assisted braking system failure                    11.

        Note 1/:  Heat fade is always the last test to be carried out.

       2. Preparation

       2.1. Engine idle speed

        The engine idle speed is set to the manufacturer's specification.

       2.2. Tyre pressures

        The tyres are inflated to the manufacturer's specification for the vehicle loading condition for the test.

       2.3. Control application points and direction

        For a hand control lever, the input force (F) is applied on the control lever's forward surface perpendicular to the axis of the lever fulcrum and its outermost point on the plane along which the control lever rotates (see figure below).

        The input force is applied to a point located 50 mm from the outermost point of the control lever, measured along the axis between the central axis of the fulcrum of the lever and its outermost point.
        For a foot control pedal, the input force is applied to the centre of, and at right angles to, the control pedal.

       2.4. Brake temperature measurement

        As determined by the approval authority, the brake temperature is measured on the approximate centre of the braking path of the disc or drum using:

        (a) A rubbing thermocouple that is in contact with the surface of the disc or drum;               or

        (b) A thermocouple that is embedded in the friction material.

       2.5. Burnishing procedure

        The vehicle brakes are burnished prior to evaluating performance. This procedure may be completed by the manufacturer:

        (a) Vehicle lightly loaded;

           (b)