Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1989-08-10
1991-01-22
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303100, 303110, 303 61, 188181R, B60T 858
Patent
active
049866141
ABSTRACT:
An electric motor-driven brake pressure modulator motor is designed and controlled to exhibit different speed/torque performance characteristics depending on the direction of motor rotation. In the forward direction when the brake pressure is being applied, the torque characteristic of the motor is maximized to develop adequate brake pressure. In the reverse direction when the brake pressure is being relieved, the speed characteristic of the motor is maximized to quickly relieve the brake pressure. The result is an antilock braking system in which the braking performance is maximized without the design compromise penalties of presently known systems.
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Foster Richard L.
Ricker Dennis J.
Butler Douglas C.
General Motors Corporation
Navarre Mark A.
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