| 摘要 |
A brake pressure distribution valve distributes fluid pressure to front brakes in proportion to fluid pressure distributed to rear brakes, and in addition, "holds off" the pressure distribution to the front brakes for delayed distribution thereto. The valve includes a housing having a cavity formed therein. Inlet and outlet ports permit fluid to flow into and out of the cavity. A first piston engages a metering seal to normally close one fluid passage and to cut off fluid communication between inlet and outlet ports. Another fluid passage is normally open to establish fluid communication between the inlet and outlet ports. Due to a fluid pressure buildup, a closing member is actuated to close the other passage thus holding off pressure distribution to the front brakes. As the fluid pressure buildup continues the one passage opens to re-establish fluid communication between the inlet and outlet ports. The valve may be used in a vehicle brake system in cooperation with a master cylinder, front disc brakes and rear drum brakes.
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