Vehicle brake booster

Details Vehicle brake booster Vehicle brake booster

1997-07-02

1999-01-12

Nguyen, Hoang

Power plants

Pressure fluid source and motor

Pulsator

60581, 60591, B60T 1300

Patent

active

058573348

ABSTRACT:
A vehicle brake booster comprises: a body having an input port, an output port, and a flow path through which the input port is communicated with the output port; a first piston which is arranged in the flow path, and on which the hydraulic pressure in the flow path acts; a control valve which is abutted against the first piston, and defines a control chamber which is able to introduce or block the hydraulic pressure of an accumulator; a second piston which is arranged downstream of the first piston in the flow path, the second piston being in the form of a stepped piston having a large diameter portion and a small-diameter portion to the end of which the hydraulic pressure in the flow path is applied, and being able to produce a wheel cylinder pressure; a hydraulic pressure chamber formed in the large-diameter portion of the second piston; and a cut valve arranged downstream of the second piston in the flow path.

REFERENCES:
patent: 3978667 (1976-09-01), Ohara
patent: 4986613 (1991-01-01), Nishii et al.
patent: 5010732 (1991-04-01), Yagi
patent: 5013094 (1991-05-01), Nishii et al.
patent: 5090293 (1992-02-01), Winterlik

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