Patent ID: 6443539
Filing Date: 2002-09-03
Classification: B60T

Abstract:
A system for controlling at least one vehicle wheel brake, the system comprising:a valving device adapted to be connected to the controlled vehicle wheel brake, said valving device operable for controlling application of pressurized fluid to the controlled wheel brake; a wheel speed sensor for monitoring the speed of a vehicle wheel associated with the controlled wheel brake; and a microprocessor coupled to said valving device and said wheel speed sensor, said microprocessor operative to selectively actuate said valving device to control the wheel brake, said microprocessor also operative to measure a duration of a wheel speed departure of said wheel associated with the controlled wheel brake and to calculate an average deceleration of said wheel during said wheel speed departure, said microprocessor further operative to set a wheel speed sneakdown flag if said wheel speed departure duration is one of greater than and equal to a predetermined wheel speed departure duration threshold and said average deceleration is one of greater than and equal to a deceleration threshold.