An Electronic Brake Control System having four channels and three wheel speed
sensors. The wheel speed sensors include a pair or speed sensors for monitoring
the speeds of the individual front wheels and a single speed sensors for monitoring
the speed of both rear wheels. The system monitors front wheel speeds during wheel
acceleration and, upon detecting excessive slippage of one of the front wheels
and the rear axle, applies the front and rear wheel brakes on the side of the slipping
front wheel to transfer driving torque to the side of vehicle with a higher coefficient
of road surface friction. Alternately, with a four wheel drive vehicle, both rear
wheel brakes can be applied to transfer driving torque to the front wheels. The
system also senses vehicle parameters during turning maneuvers and, upon detecting
an understeer situation, the system is operative to apply one of the rear wheel
brakes to correct the undeersteer.
