초록 ▼

An accumulator assembly for a vehicle anti-lock brake system receives and temporarily stores fluid during pressure reduction phases of the anti-lock operation, and maintains fluid stored therein substantially at or near zero pressure during anti-lock operation. The accumulator enables the fluid pres

An accumulator assembly for a vehicle anti-lock brake system receives and temporarily stores fluid during pressure reduction phases of the anti-lock operation, and maintains fluid stored therein substantially at or near zero pressure during anti-lock operation. The accumulator enables the fluid pressure to the controlled brakes to be reduced to substantially near zero pressure. The accumulator is further operative, after braking of the vehicle, to apply a predetermined pressure above zero pressure to the brake fluid stored therein to enable the fluid to be returned to the brake system. The accumulator is advantageously used in a pumpless anti-lock system which is operative to control the rear disc brakes of a light pick-up truck.

대표청구항 ▼

In a vehicle anti-lock brake system adapted to control the fluid pressure in a brake circuit to at least one selected wheel brake to correct an impending lock-up condition of an associated wheel, the brake system including a valve means connected between the selected wheel brake and a fluid accumula

In a vehicle anti-lock brake system adapted to control the fluid pressure in a brake circuit to at least one selected wheel brake to correct an impending lock-up condition of an associated wheel, the brake system including a valve means connected between the selected wheel brake and a fluid accumulator, the valve means being selectively controlled during anti-lock operation of the brake system to supply brake fluid to the fluid accumulator for reducing fluid pressure to the selected wheel brake, the fluid accumulator comprising: a reservoir having an opening for receiving and retaining brake fluid during anti-lock operation; means for maintaining fluid pressure of said brake fluid within said reservoir at a first predetermined pressure during anti-lock operation; and means operative only when the brake system is not under anti-lock operation for applying a second predetermined pressure greater than said first predetermined pressure to said brake fluid within said reservoir to enable said brake fluid to flow through said opening and be returned to the brake circuit.