| 摘要 |
A fluid pressure proportioning valve (48), particularly of the type which is used in the hydraulic braking systems of automotive vehicles, includes a plug member (28) movably carrying a piston member (50). The piston member (50) defines a through bore (88) communicating pressurized fluid to an outlet on the plug member (28). The piston member also carries a valve member (116) opening and closing the through bore (88) in response to reciprocation of the piston member (50). A lip seal (62), spring seat (100), and a coil spring (110) are carried by the piston member (50). The plug member (28), piston member (50), valve member (116), lip seal (62), spring seat 100, and coil spring 110, comprise a unitary subassembly (142) which may be assembled with a housing providing a bore for receiving the coil spring (110) and lip seal (62) and providing an inlet communicating pressurized fluid from a master cylinder (10). The unitary subassembly (142) incorporates virtually all component parts, the dimension of which affect the proper operation of the fluid pressure proportioning valve. As a result, the dimensional tolerances of the housing may be relaxed without adverse effect upon the proportioning valve (48). |
