REMOTE COMPENSATION VALVES FOR A MASTER CYLINDER IN A BRAKE SYSTEM

摘要

A remote compensation valve (20) through which pressurized fluid from a master cylinder (14) is communicated to the wheel brakes (24,26) of a vehicle. The compensation valve (20) has a housing (200) with a bore (202) therein for retaining a shuttle piston (210). The shuttle piston (210) has a first land (212) separated from a second land (214) by a groove (216) and an axial bore (218) connected to the groove (216) by a radial bore (224). A first spring (250) carried by the piston (210) urges a poppet valve (244) toward a seat (230) to control the communication of pressurized fluid through the axial bore (218) to an outlet port (208). A tilt valve (232) located in a compensation port (206) has a pin (234) that extends into the groove (216). A second spring (254) located in the housing (200) urges the piston (210) toward a rest position where the first land (212) engages the pin (234) of the tilt valve (232) to establish communication between the source of fluid and the bore (202) and poppet valve (244) is seated on the piston (210) to prevent communication through the axial bore (218). A movable stop pin (258) retained in the housing (200) has a first end (262) external to the housing (200) and a second end (264) that extend into the axial bore (218) of the piston (210). A manual input force on the first end (262) of the movable stop pin (250) brings the second end (266) into engagement with the poppet valve (244) to initiate communication between the compensation port (206) and the master cylinder (14) to remove any air from the master cylinder (14).