Document ID: chunk:federal_register_of_legislation:F2006L03061:body:0:p21
Version: federal_register_of_legislation:F2006L03061
Segment Type: other
Provision Reference: 
Character Range: 57994–61185

System' such that it rises from zero to 65 percent of the final value in not more than 0.22 second. In the case of air 'Brake System's' the input 'Control Signal' strength (kPa) will be measured at the trailer 'Control Line' coupling.

38.4.6.1.3.              The output signal strength shall be the final value of the signal generated for control of the 'Brakes' actuator and which shall be reached in not more than two seconds. The output signal strength (kPa) will be measured in the actuator attached to each output having a fundamentally different relation to the input. In the case of air 'Brake Systems' a 'Control Signal' path having additional pressure limiters, relay valves or other active devices will be considered as being fundamentally different.

38.4.6.1.4.              Time response shall be measured where necessary in accordance with clause 38.3.11 (time response measurement). Where the 'Control System' is not installed on an actual trailer, it shall be installed in an essentially identical manner, in the laboratory, with all bends, fittings and worst case line lengths and representative actuator volumes installed. Actuator displacement shall be the largest volume for which the 'Control System' is designed and it may be represented by an equivalent fixed volume.

38.4.6.1.5.              All relevant test conditions pertaining to clause 38.3.2 (road test general conditions) shall be complied with.

38.4.6.1.6.              The 'Control System' to be approved shall be fully documented and the logic of its operation described and assurances provided that the 'Control System' will meet the systems requirements of this Rule.

38.4.6.2.                    'Foundation Brakes'

38.4.6.2.1.              The effectiveness of the 'Foundation Brakes' shall be characterised by comparing the 'Control Signal' provided to the 'Brakes' actuator against the output brake torque of the 'Brakes' device at not less than five points approximately equally spaced over the range 0.2 'E' to 1.0 'E'.

Parameters relevant to the specification of the 'Brakes' actuator, and its stroke at each 'Control Signal' level, shall be recorded. In the case of 'S-Cam' air systems this wi11 include the actuator size, slack adjuster length and any other special feature.

38.4.6.2.2.              Measurements shall be taken under the conditions prescribed for the dynamometer test in clause 38.3.8 and clause 38.3.9 or in accordance with the relevant conditions for the road test described in clause 38.3.2 and clause 38.3.3.

38.4.6.2.3.              The 'Brakes' shall be burnished before conducting any effectiveness tests according to the brake manufacturer's recommended procedures.

38.4.6.2.4.              Specification of effectiveness for 'Foundation Brakes' shall be on the basis of 'Axle' performance with two brake assemblies rather than wheel performance.

38.4.6.3.                    Suspension Behaviour

38.4.6.3.1.              Suspensions shall be classified by the 'Administrator' as 'Brake Reactive Suspensions' or non 'Brake Reactive Suspensions'.

38.4.6.3.2.              Suspensions being determined as brake reactive shall be further specified