1. Definitions
For the purposes of this Annex:
‘integrated endurance braking system’ means an endurance braking system whose control device is integrated with that of the service braking system in such a way that both endurance and service braking systems are applied simultaneously or suitably phased by operation of the combined control device;
‘sensor’ means a component designed to identify and transmit to the controller the conditions of rotation of the wheel(s) or the dynamic conditions of the vehicle;
‘controller’ means a component designed to evaluate the data transmitted by the sensor(s) and to transmit a signal to the modulator;
‘modulator’ means a component designed to vary the braking force(s) in accordance with the signal received from the controller;
‘indirectly controlled wheel’ means a wheel whose braking force is modulated according to data provided by the sensor(s) of other wheel(s);
‘full cycling’ means that the anti-lock braking system is repeatedly modulating the brake force to prevent the directly controlled wheels from locking and excluding brake applications where modulation only occurs once during the stop;
‘full force’ means the maximum force laid down in the braking tests and performance of braking systems according to this Regulation.
For the purposes of directly and indirectly controlled wheels, anti-lock braking systems with ‘select-high’ control are deemed to include both directly and indirectly controlled wheels; in systems with ‘select-low’ control, all sensed wheels are deemed to be directly controlled wheels.