Hydraulic braking system with hydraulic booster

Details Hydraulic braking system with hydraulic booster Hydraulic braking system with hydraulic booster

1990-09-28

1992-06-23

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

With pump

60589, B60T 1314

Patent

active

051237121

ABSTRACT:
A hydraulic braking system includes a master cylinder having a bore with an opening and a closed wall at opposite ends. At least one piston is slidably fitted in the bore and operatively connected to a brake pedal and at least one pressure chamber is defined in the bore by the piston and in communication with wheel cylinders of the vehicle. A normally open valve is associated with the piston so as to close a passage communicating between a reservoir and the pressure chamber when the piston is moved in response to the depression of the brake pedal. A hydraulic booster actuates the master cylinder in response to depression of the brake pedal, and an interrupting device interrupts the communication between the pressure chamber and the reservoir before the normally open valve closes the passage means and is interposed between the pressure chamber and the reservoir. Thereby, the idle stroke of previous master cylinders is eliminated. As a result, the initial stroke of the brake pedal is reduced and a light brake actuation feel is obtained.

REFERENCES:
patent: 4582365 (1986-04-01), Belart
patent: 4641891 (1987-02-01), Belart
patent: 4642989 (1987-02-01), Belart
patent: 4649707 (1987-03-01), Belart
patent: 4671066 (1987-06-01), Belart
patent: 4800724 (1989-01-01), Asahara et al.

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