Vehicle brake control system

Details Vehicle brake control system Vehicle brake control system

1982-03-26

1984-01-31

Reger, Duane A.

Fluid-pressure and analogous brake systems

Multiple systems

Fluid pressure and electric

303 9, B60T 1374

Patent

active

044286201

ABSTRACT:
A hybrid vehicle brake system with one set of brakes actuated by hydraulic pressure generated by a master cylinder in the usual manner, and a second set of hydraulically actuated wheel brakes controlled by brake effort demand as expressed by movement of the vehicle brake pedal by the vehicle operator to produce a brake demand signal independently of the master cylinder and the brake circuit for the first set of wheel brakes. The hydraulic pressure for the second brake set is maintained in an accumulator by a high and low pressure limit pump arrangement. When the stored brake pressure is required for brake actuation, it is directed through a variable valve arrangement to deliver the amount of actual brake actuating pressure needed at the second brake set to meet the operator's demand for braking effort. A control unit receives the brake demand signal as well as a signal indicating the actual brake actuating pressure sent to the second set of brakes. The control unit makes the brake supply pressure from the accumulator available and controls the variable valve arrangement to present the correct actual brake actuating pressure to the second brake set.

REFERENCES:
patent: 4005759 (1977-02-01), Farr
patent: 4181366 (1980-01-01), Dobner

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