| 摘要 |
A velocity control system for an engine valve is provided. The system includes a valve having a housing defining an opening, a chamber adapted to receive a fluid, a first fluid passageway connecting the opening with the chamber, a second fluid passageway connecting the opening with the chamber, and a third fluid passageway connecting the opening with the chamber. A piston is slidably disposed in the chamber and is moveable from a first position to a second position. The movement of the piston from the first position to the second position forces fluid from the chamber at a first flow rate during movement of the piston through a first travel distance and at a second flow rate during movement of the piston through a second travel distance. The first flow rate is greater than the second flow rate. A check valve is adapted to prevent fluid from flowing from the chamber through the first fluid passageway when the piston is moving from the first position to the second position.
|
