Patent ID: 7300118
Filing Date: 2007-11-27
Classification: B60T

Abstract:
1. A vehicle brake system including a parking brake, said brake system comprising: a source of fluid pressure adapted to supply a braking force to at least one brake actuator including a parking brake chamber; a combination valve fluidly coupling the brake actuator to said source of fluid pressure, said combination valve having an inlet fluidly coupled to the source of fluid pressure and an outlet fluidly coupled to the brake actuator, said combination valve comprising within a single housing: a solenoid responsive to electrical signals to move from one position in which the parking brake chamber of the brake actuator is fluidly coupled to said source of fluid pressure in order to pressurize the parking brake chamber and release the parking brake, and another position in which the parking brake chamber of the brake actuator is vented in order to exhaust pressure within the parking brake chamber so that the parking brake is applied; and at least one of a manifold, an inversion valve, a double check valve and an anti-compounding valve; wherein said combination valve comprises within a single housing said solenoid and all four of the manifold, the inversion valve, the double check valve and the anti-compounding valve.