Patent ID: 6929103
Filing Date: 2005-08-16
Classification: B60T

Abstract:
1. A brake system for applying a braking force to a vehicle wheel responsive to a brake force control signal comprising: a rotor connected for rotation with the vehicle wheel; a plurality of hydraulic actuators for engaging the rotor to apply the braking force, each hydraulic actuator having: a brake control unit in fluid communication with the working inlets and the working outlets, and operable responsive to the brake force control signal in a brake-off position and a brake-on position, the brake-off position providing substantially unrestricted fluid communications between the working outlets and the working inlets and the brake-on position providing restricted fluid communications between the working outlets and the working inlets in proportion to the brake force control signal; and a by-pass valve in fluid communication with the working outlets, the brake control unit and the working inlets, and operable in a by-pass off position and a by-pass on position, the by-pass off position providing substantially unrestricted fluid communications between the working outlets and the brake control unit and the by-pass on position providing substantially unrestricted fluid communications between the working outlets and the working inlets thereby by-passing and negating the effect of the brake control unit.