Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1998-03-13
2000-06-06
Schwartz, Chris
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031162, 3031164, B60T 1314, B60T 834
Patent
active
060709510
ABSTRACT:
A brake circuit is provided for providing a fluid communication between a master cylinder and a brake cylinder of a road wheel. A fluid pressure control valve is installed in the brake circuit for controlling the fluid pressure in the brake cylinder. A reservoir is connected to a discharge circuit extending from the fluid pressure control valve. A pump includes a cylinder member, a plunger movably disposed in the cylinder member to define a volume variable pressure chamber, and a seal member operatively disposed between the cylinder member and the plunger to hermetically insulating the pressure chamber. A first inlet circuit conveys the brake fluid in the reservoir to the pressure chamber of the pump, a second inlet circuit conveys the brake fluid in the master cylinder to the pressure chamber of the pump, and an outlet circuit conveys the brake fluid in the pressure chamber of the pump to the fluid pressure control valve. An outside gate valve selectively opens and closes the brake circuit. An inside gate valve selectively opens and closes the second inlet circuit. A control unit controls the fluid pressure control valve, the pump and the outside and inside gate valves for carrying out an antilock brake control and a vehicle motion stabilizing control. The cylinder member of the pump is formed with an opening through which the second inlet circuit is fluidly communicated with the pressure chamber of the pump. The opening is exposed to the pressure chamber even when the plunger takes a deepest position in the cylinder member to minimize the size of the pressure chamber.
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Inisia Jecs Corporation
Schwartz Chris
LandOfFree
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