Fluid-pressure and analogous brake systems – Multiple control
Patent
1991-07-30
1993-06-22
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple control
605471, 60566, 188358, 303 14, 303 15, 303100, 3031132, 3031141, 3031161, 3031171, 3031192, B60T 832, B60T 848
Patent
active
052211266
ABSTRACT:
A brake control system for an automotive vehicle has an improved hydraulic circuit network which is capable of performing pressure boosting operation for a pressure supplied from a master cylinder, as well as anti-skid brake control operation and traction control operation. The system includes a valve device for selectively establishing and blocking fluid communication between master cylinder and wheel cylinder. The valve device is generally responsive to the fluid pressure supplied from the master cylinder to enter into pressure boosting mode in response to increase in the fluid pressure from the master cylinder across a predetermined value. An electronically operable boost control device cooperates with the valve device for varying pressure boosting magnitude depending upon vehicle driving condition. An electronically operable traction control device is also provided and cooperates with the boost control device for generating a braking force to decelerate a vehicle wheel irrespectively of manual operation state of brake system when wheel spinning is detected or predicted. The system exhibits high safety level by an enhanced fail-safe function.
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SAE Technical Paper No. 84 0468, p. 3, FIG. 3.
Butler Douglas C.
Nissan Motor Co,. Ltd.
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