Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1991-03-19
1992-09-15
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303113TR, B60T 858
Patent
active
051471175
ABSTRACT:
An integrated anti-lock braking (ABS)/traction control (TC) braking system for a vehicle is provided including in a preferred embodiment a controller cognizant of the rotational condition of a vehicle wheel for signalling the system to an ABS or TC mode. A master cylinder delivers pressurized fluid to the wheel brake. An actuator frame with a bore is fluidly connected with the master cylinder and the wheel brake generally along a first end. A first fluid network connects the master cylinder with the wheel brake. A reservoir fluidly connected with the bore and the brake for selective receipt of fluid from the bore. A second fluid network connects the reservoir and the ends of the bore with one another and fluidly connects the reservoir with the wheel brake. A check valve preventing flow from the master cylinder to the brake via the first fluid network. A valve responsive to the controller isolates the reservoir from the second fluid network when the integration is in the normal operation or the TC mode. A valve responsive to the controller which prevents fluid communication through the second fluid network when the integration is in an ABS mode. A valve responsive to the controller which prevents fluid communication between the master cylinder and the bore when the integration is in a TC mode. A piston is slidably mounted in the bore with a head separating the first and second ends of the bore.
REFERENCES:
patent: 4741581 (1988-05-01), Krohn
patent: 4798421 (1989-01-01), Bernhardt et al.
patent: 4846534 (1989-06-01), Lieber et al.
patent: 4874208 (1989-10-01), Siegel
patent: 4932311 (1990-06-01), Mibu et al.
patent: 4957331 (1990-09-01), Burton et al.
General Motors Corporation
Graham Matthew C.
Helms Ernest E.
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