| 摘要 |
The invention is directed to a hydraulic braking system for an automotive vehicle having a power source for generating a hydraulic power pressure, a reservoir, a master cylinder, a hydraulic booster for actuating the master cylinder in response to depression of a brake pedal and a plurality of wheel brake cylinders for braking respective road wheels. The hydraulic booster has a power piston for actuating a master piston of the master cylinder, and defines a first boost chamber which introduces the hydraulic power pressure from the power source to apply to the power piston, and a second boost chamber which is separated from the first boost chamber by the power piston and which introduces a hydraulic pressure from the first boost chamber to actuate the master piston. And, valve means is disposed between the first and second boost chambers and controls the communication therebetween to provide a variable characteristic of the pressure applied to the master cylinder in response to the depressing force applied on the brake pedal.
|
