초록

The present invention relates to systems for controlling wheel spin in a motor vehicle such as an automobile, and in particular to such a system which includes a pump-back adaptive braking system and a traction control system which utilize a common pump and wheel cylinder pressure modulating valves.

대표청구항 ▼

In a wheel slip control system comprising speed sensor means operatively connected to the wheels of a vehicle for generating a signal as a function of the rotation thereof, control means responsive to the rotational behavior of the wheels for generating control signals in response to wheel slip, mea

In a wheel slip control system comprising speed sensor means operatively connected to the wheels of a vehicle for generating a signal as a function of the rotation thereof, control means responsive to the rotational behavior of the wheels for generating control signals in response to wheel slip, means including a master cylinder and at least one wheel brake cylinder for applying braking force to said wheels, brake pressure modulating means for automatically modulating the application of braking force to said wheels in response to said control signals, the improvement wherein said modulator means includes pump means operable in a first state to pump braking fluid from a first source and operable in a second state to draw and pump fluid from a second source, first valve means operable in response to a traction control signal for blocking communication from said wheel cylinder to said master cylinder and providing communication therebetween in the absence of said traction control signal, and second valve means for connecting said pump means to said second source in response to said traction control signal and blocking communication therebetween in the absence of said traction control signal.