Hydraulic booster

Details Hydraulic booster Hydraulic booster

1991-03-26

1992-09-01

Look, Edward K.

Power plants

Pressure fluid source and motor

Pulsator

B60T 1320

Patent

active

051428652

ABSTRACT:
There is disclosed an automotive hydraulic brake booster in which a driver feels a brake pedal moving smoothly as he or she pushes down on the brake pedal. The booster includes a housing connected with a master cylinder, an input rod, a booster chamber formed in the housing, a power piston sliding inside the booster chamber, and a reaction piston connected to the input rod and inserted in a hole formed in the power piston. A linkage is connected to a valve for boosting the force supplied to the master cylinder and connected to the reaction piston. The reaction piston can move a given distance relative to the power piston in response to the input rod, this distance being determined by a stop. The stop and the connection between the input rod and the reaction piston are on the same side of the connection between the linkage and the reaction piston. A reaction chamber is formed in said hole by the reaction piston. A resilient member is mounted between both metallic pistons to mitigate the collision between both pistons when the reaction piston moves the given distance relative to the power piston.

REFERENCES:
patent: 3733968 (1973-05-01), Boch
patent: 4761042 (1988-08-01), Seibert et al.
patent: 4903487 (1990-02-01), Leiber
patent: 5065573 (1991-11-01), Nomura et al.
patent: 5065580 (1991-11-01), Nishii

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