| 摘要 |
<p>A device for controlling at least one valve, the device comprising a body having a non-deformable cavity communicating exclusively with the outside via at least four rectilinear cylinders that are closed respectively by an opening piston (P1) actuated by an opening cam (C1), a closing piston (P2) actuated by a closing cam (C2), a shuttle piston (Pa) serving to load or unload the device, and a piston (Ps) that is mechanically connected to the valve. By adjusting the angular phase shift between the opening and closing cams (C1, C2), the control device of the invention makes it possible in operation to adjust the lift of the valve, the angular duration of the opening of the valve, and if necessary, to deactivate the valve completely throughout the duration of a cycle.</p> |
