Patent ID: 6203117
Filing Date: 2001-03-20
Classification: B60T,F16L,Y10S

Abstract:
A hydraulic control unit of an electronically-controlled vehicular brake system comprising:a housing including a bore, wherein the bore is in fluid communication with a first fluid passage leading to an outlet of a pump, and wherein the bore is in fluid communication with a second fluid passage leading to a master cylinder;a restricted orifice formed between the bore and the second fluid passage;a retainer cap mounted in the bore;a piston slidably received in the retainer cap, the piston including a fluid channel providing fluid communication between the first and second fluid passages;a spring positioned between the retainer cap and the piston to urge the piston from the retainer cap; anda check valve assembly mounted in the fluid channel of the piston that permits only one-way fluid flow from the first fluid passage to the second fluid passage, wherein the check valve assembly includes a check ball.