Anti-lock brake control circuit

Details Anti-lock brake control circuit Anti-lock brake control circuit

G - Physics

05

D

341/73.22

G05D 13/62 (2006.01) B60T 8/1763 (2006.01)

Patent

CA 1065449

ANTI-LOCK BRAKE CONTROL CIRCUIT Abstract of the Disclosure: An anti-lock brake control circuit compares the deceleration of a braked wheel with a deceleration reference and integrates the difference when wheel deceleration exceeds the reference deceleration. A resulting velocity error sig- nal is compared with a velocity error reference and a release signal is generated while the velocity error signal exceeds the velocity error reference. Adaptive control is provided by a first order lag circuit having wheel velocity as its input and which supplies a variable portion of the decelera- tion reference having a slope approximately equal to the slope of the vehicle velocity profile during braking on low coeffi- cient surfaces and having a slope less than the slope of the vehicle velocity profile during braking on high coefficient surfaces. An initial cycle and pulse circuit sets the velocity error reference to a high level for both the first cycle of anti-lock brake operation and for a time period after each brake application during anti-lock brake operation.

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