| 摘要 |
PCT No. PCT/GB93/00594 Sec. 371 Date Sep. 26, 1994 Sec. 102(e) Date Sep. 26, 1994 PCT Filed Mar. 23, 1993 PCT Pub. No. WO93/18949 PCT Pub. Date Sep. 30, 1993.An electronic braking system for a vehicle having foundation brakes (137, 138) and a vehicle retarder (129), wherein an electrical braking demand signal (D) is generated from a single brake pedal and wherein the retarder (129) is operated variably or in small steps as the brake pedal movement is increased from a zero or rest position up to a partial point in its movement range which is calculated to give substantially maximum retarder powder based on the total mass of the vehicle. As a result, for a fully loaded condition this partial point occurs at low pedal deflection and, in an unloaded condition where a given retarder will produce a higher deceleration, this point occurs at a higher pedal deflection, wherein in both cases pushing the pedal beyond the calculated partial point causes foundation braking to be commenced to supplement the retarder torque.
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