Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1994-01-13
1995-04-11
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031161, 3031191, 303900, 303901, B60T 832, B60T 848, B60T 858
Patent
active
054051916
ABSTRACT:
A wheel brake fluid pressure control device has a main fluid line and a return-flow type antilock control function. This device also has a fluid supply line branching from the main fluid line so that it has a traction control function as well. It is necessary to provide such a device with a shutoff valve for checking the fluid flow from the fluid supply line to the discharged fluid reservoir while the master cylinder is being pressurized. The shutoff valve employed is not an expensive solenoid valve or a pressure-responsive valve, but a pressure-responsive type check valve which closes when the brake pressure in the discharge line exceeds a predetermined level. This shutoff valve is simple in structure and low in cost and can improve the reliability of the entire device. Also, by using this valve, the traction control function can be added to an existing antilock control device at a low cost.
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Nishiyama Yukinori
Takata Koji
Butler Douglas C.
Sumitomo Electric Industries Ltd.
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