Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1992-03-09
1993-08-10
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031152, B60T 858, B60T 834
Patent
active
052342638
ABSTRACT:
Anti-lock/traction control braking system for a vehicle is provided which in a preferred embodiment includes a master cylinder, a brake, a controller providing a signal when a wheel condition is within preset parameters, an isolating value to separate the brake from the master cylinder means when the braking system goes into an anti-lock braking or traction control mode of operation, an anti-lock braking actuator including a bore fluidly connecting with the brake and having a piston reciprocally mounted within and a first motor responsive to a signal given by the controller for powering the anti-lock braking piston. A traction control actuator is also provided having fluid connections with the master cylinder and the anti-lock braking actuator. The traction control actuator has at least one piston reciprocally mounted within a bore. Upon actuation of the traction control the wheel brake is pressurized by the traction control actuator and thereafter traction control modulation of the wheel brake is accomplished by reciprocal movement of the ABS piston within the ABS actuator.
REFERENCES:
patent: 4812723 (1989-03-01), Shimizu
patent: 4957331 (1990-02-01), Burton et al.
patent: 5085490 (1992-02-01), Steinhauser et al.
patent: 5161865 (1992-11-01), Higashimata et al.
Haerr Timothy A.
Parker Donald L.
General Motors Corporation
Graham Matthew C.
Helms Ernest E.
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