Document ID: chunk:federal_register_of_legislation:F2006L03060:body:0:p15
Version: federal_register_of_legislation:F2006L03060
Segment Type: other
Provision Reference: 
Character Range: 41066–43817

Entire subsections of the 'Brake System' have been removed, as would be the case in converting a modular three 'Axle' system to a modular two 'Axle' system, such that the effect if any is to slightly increase the energy flow rate to and from the remaining brake sub-systems.

            (c)  The energy required to actuate the substitute brake actuators to their maximum design level is less.

38.3.11.3.                Where a trailer 'Brake System' is required to be tested for compliance with clauses 38.2.2.3 and clause 38.2.2.4 in the case of compressed air 'Brake System', the test rig described in Figure 2 shall be calibrated in accordance with clause 38.3.11.3.2 and connected as described in Figure 3.

38.3.11.3.1.          Where a rear service coupling for towed trailers is provided, time responses shall be measured with an 800 millilitres vessel attached to the rear service coupling as in Figure 3.

38.3.11.3.2.          The test rig described in Figure 2 shall be calibrated by adjustment of the orifice (O) such that with the storage reservoir (R1) charged to 1.0 'E' (650 kPa), the time between the initial pressure drop measured between the storage reservoir and the control valve (V), and the pressure at the end of the calibrating vessel (R2) increasing to 0.65 'E' (420 kPa), is between 0.18 and 0.22 seconds.

38.3.11.3.3.          The test rig and the trailer energy storage devices shall be charged to 1.0 'E' (650 kPa) prior to the test being conducted and no additional energy shall be added to the storage vessel (R1) or the trailer 'Supply Line' during the period of the test.

38.3.11.3.4.          The brake actuation time shall be taken from when the pressure level, measured between the storage reservoir and the control valve, initially drops to when the pressure in the least favoured brake actuator reaches 0.65 'E' (420 kPa).

38.3.11.3.5.          With an initial service brake application level of 1.0 'E' (650 kPa) the brake release time shall be taken from when the pressure level, measured between the control valve and the orifice, initially drops to when the pressure in the least favoured brake actuator reaches 0.05 E (35.0kPa).

38.3.11.3.6.          The brake control valve shall be of a configuration that permits energy to flow from the storage reservoir to the orifice (O) when in the "on" position and from the orifice to waste when in the "off" position. It shall not allow additional energy to flow into the test rig 'Control Line' by way of its own 'Control Signal'. The brake control valve control shall be designed so that the manner of its operation shall have no effect on the output response of the test rig. The brake control valve may be arranged to provide a modulated test rig