| 摘要 |
A valve control system for an internal combustion engine includes a housing comprising a cylinder defining a longitudinal axis and an exhaust port. A piston is disposed in the cylinder and is moveable along the longitudinal axis in a first and second direction. The piston has a first and second side. An engine valve is operably connected to the first side of the piston. An exhaust member is disposed in the housing and is variably moveable along a longitudinal path to a desired position between a maximum and minimum lift position. The exhaust member has an exhaust port that is maintained in communication with the housing exhaust port as the exhaust member is selectively, variably moved between the maximum and minimum lift positions. A pressure source selectively applies a pressure to the second side of the piston as the piston is moved in the first direction. A control system is operably connected to said exhaust member and selectively, variably moves the exhaust member between the maximum and minimum position. The piston is moveable along the longitudinal axis in the first direction to a lift position wherein the piston blocks the exhaust member exhaust port. Preferably, the exhaust member is continuously variably moveable, meaning it is moveable between an infinite number of positions, such that the control system provides continuously variable lift control. A method for controlling the engine valve is also provided.
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