| 摘要 |
A pressure regulator for a vehicle braking system through which fluid under pressure is supplied to actuate wheel brakes and which includes means to limit brake pressure to a proportion of applied pressure dependent on a variable ratio lever system whose ratio depends on the load of the vehicle. Up to a given applied pressure the rate of increase of brake pressure is dependent on the ratio of the lever system, above that pressure the rate of increase of brake pressure is reduced dependent on the ratio of the lever system. However, where the rate of increase of brake pressure is equal to the rate of increase of applied pressure at the given applied pressure, the subsequent rate of increase of brake pressure is reduced dependent on the ratio of the lever system at a further given applied pressure dependent on the ratio of the lever system.
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