Hydraulic boosters for vehicle braking systems

Details Hydraulic boosters for vehicle braking systems Hydraulic boosters for vehicle braking systems

1982-04-12

1984-04-17

Reger, Duane A.

Fluid-pressure and analogous brake systems

Motorman's valves

60548, B60T 1314

Patent

active

044430400

ABSTRACT:
In an hydraulic booster for a vehicle braking system a boost piston provides an output force in response to pressurization of a boost chamber under the control of a boost valve mechanism, which controls communication between the boost chamber and a pressure source and the boost chamber and a fluid reservoir. The operation of the boost valve mechanism is controlled by pressure in a control chamber which is pressurized by operation of a pedal-operated input piston. A recuperation valve controls communication between the boost and control chambers, and is operated in response to movement of the input piston. Pressure in the boost chamber acts on the input piston to urge it in a direction to keep the recuperation valve closed. This enables the input piston to work in a bore in the boost piston, with the control chamber in the boost piston and forward of the boost chamber.

REFERENCES:
patent: 4034566 (1977-07-01), Suketomo et al.
patent: 4181371 (1980-01-01), Adachi

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