| 摘要 |
The present invention relates to a valve system for an internal combustion engine having a pressure source of pressurised fluid, comprising an exhaust or intake valve, an actuator comprising an actuator housing having an axial extension between a first housing end and a second housing end, the first housing end having a first opening fluidly connected with the pressure source, a piston which is slidable within the actuator housing and has a first piston end and a second piston end, the second piston end being connected to the valve through an opening in the second housing end for activating the valve between a closed position and an open position, and a first chamber defined between a first piston face of the first piston end and the first housing end, the first piston face facing the first end of the actuator housing, wherein the piston comprises a second piston face arranged displaced in relation to the first piston face along the axial extension, the second piston face being arranged in a second chamber defined by the actuator housing and the piston, and the piston comprises or defines a fluid channel fluidly connecting the first chamber and the second chamber, so that the pressurised fluid is led from the first chamber to the second chamber to press onto the second piston face and open the valve. The present invention also relates to an internal combustion engine comprising the valve system according to the present invention and to a valve actuation method for moving an intake/exhaust valve of a valve system according to the present invention. |
