Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1976-10-28
1977-07-05
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303117, B60T 810
Patent
active
040336387
ABSTRACT:
A hydro-dynamic brake system of the type having a volumetric pump circulating brake fluid to a reservoir, and a modulating valve in the output of the pump acting under the control of the brake pedal to constrict the pipeline thereby increasing the pressure at the output of the pump. This pressure is fed to a distributor controlled by a solenoid valve and also receiving an input directly from a master cylinder which is also controlled by the brake pedal. Each wheel has a speed sensor feeding a processing and control circuit which produces an output signal to a solenoid valve which controls various transfer ports of the distributor. The distributor has a series of cylindrical cavities housing pistons which control valves in passages linking the chambers into which each cavity is separated by its piston. These pistons control the flow of brake fluid to the brake actuators so that upon skidding the brakes are released in a rapid but controlled manner, and likewise reapplication of the brakes after skidding is progressive so that there is no "snatching" which might lead to a loss of control.
REFERENCES:
patent: 3286734 (1966-11-01), Hartshorne
patent: 3486801 (1969-12-01), Frayer
patent: 3661427 (1972-05-01), Hodge
patent: 3702713 (1972-11-01), Oberthur
Bertone Antonino
Cattaneo Maurizio
Rivetti Enrico
FIAT Societa per Azioni
Reger Duane A.
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