Patent ID: 6375279
Filing Date: 2002-04-23
Classification: B60T,Y10S

Abstract:
A hydraulic control unit of an electronically controlled vehicular brake system comprising:a housing including a bore having an end wall and a side wall; a pump having an inlet and an outlet mounted on the housing; a fluid passageway formed in the housing between the inlet of the pump and the side wall of the bore; a slidable piston provided in the bore; and a fluid compensator to accommodate travel of a master cylinder piston, the fluid compensator including a fluid chamber formed between the end wall of the bore and the piston of the hydraulic control unit, wherein operation of the pump causes the piston to move to a position where the piston restricts fluid flow from the fluid chamber to the fluid passageway, and deactivation of the pump after operation causes the piston to move to a position where the piston does not restrict fluid flow from the fluid chamber to the fluid passageway.