Method for determining motor vehicle brake booster amplification involves determining pressures in vacuum chamber and master cylinder output to calculate pressure differential

摘要

The method of determining motor vehicle brake booster amplification involves measuring the instantaneous value of the relative vacuum in the booster vacuum chamber (24) and the hydraulic pressure in the master cylinder output. The values are sensed (28,30) with the outputs processed in a computer (32) to determine a pressure differential proportional to the instantaneous amplification of the booster and optionally the booster working chamber pressure. Claims include a circuit for operating the method