Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1992-10-29
1993-12-21
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031161, 3031191, B60T 832
Patent
active
052716678
ABSTRACT:
A brake fluid pressure control device has a wheel brake fluid pressure control valve including a discharge valve provided in a main fluid passage extending from a master cylinder to wheel brakes. A discharged fluid reservoir is provided to temporarily store the brake fluid discharged from the discharge valve. A pump is provided to pump the brake fluid out of the discharged fluid reservoir to return it to the main passage. A fluid supply passage branches from the main passage at a point upstream of a flow return point from the pump and extends to the discharged fluid reservoir. A traction control changeover valve is provided to check a fluid flow from the flow return point toward the master cylinder during traction control. A shutoff valve is provided to check a fluid flow from the master cylinder to the discharged fluid reservoir through the fluid supply passage while the master cylinder is pressurized. Further, the control device has an intermediate fluid reservoir provided upstream of the shutoff valve so as to be brought into communication with the supply passage during the traction control.
REFERENCES:
patent: 5015043 (1991-05-01), Resch
patent: 5026127 (1991-06-01), Arikawa
patent: 5028096 (1991-07-01), de la Broise
patent: 5123716 (1992-06-01), Willmann
patent: 5141296 (1992-08-01), Arikawa
Takata Koji
Yoshino Masato
Butler Douglas C.
Sumitomo Electric Industries Ltd.
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