| 摘要 |
A latching valve includes a housing, a supply port, defined in the housing, which receives supply pressure, a delivery port defined in the housing, an exhaust port, defined in the housing, and an apply port defined in the housing. A housing bore fluidly communicates with the supply port, the delivery port, the exhaust port, and the apply port fluidly. A shuttle is sealingly and movably secured in the housing bore. The shuttle is alternately set to one of an apply position and a release position as a function of sequential pilot pressures at the apply port acting on the shuttle, and as a function of the supply pressure acting on one of an apply pair of sealed seats with different diameters in the housing bore and a release pair of sealed seats with different diameters in the housing bore. The delivery port fluidly communicates with the supply port while the shuttle is in the apply position. The delivery port fluidly communicates with the exhaust port while the shuttle is in the release position. |
