Patent ID: 7624711
Filing Date: 2009-12-01
Classification: F01L,Y10T

Abstract:
1. A variable mechanical valve control for an internal combustion engine having a rocker arm or pivoting lever for adjusting a valve stroke and an opening and closing time of at least one intake and/or exhaust gas exchange valve, comprising: a camshaft having a cam contour, the cam contour having a subcontour for opening and a subcontour for closing the intake and/or exhaust valve, a transmission gear, which has an intermediate lever having an operating curve, a slide gate for guiding the intermediate lever, a contact surface of the intermediate lever, which contact surface is supported on a control shaft having an eccentric contour, whereby the rocker arm or pivoting lever, which is driven via the transmission gear by means of the camshaft, actuates the intake and/or exhaust valve, wherein the intermediate lever is linked by way of an axle to a camshaft roller in such a way that a slide gate roller, which is rotatably mounted on the axle and is driven by the camshaft, is moved in the slide gate by way of the camshaft roller and the axle, whereby the contact surface on the intermediate lever is supported on the control shaft and the rocker arm or pivoting lever is movable by means of the operating curve of the intermediate lever, by way of which the gas exchange valve will be opened and/or closed, whereby a phase shift between the camshaft and the control shaft, rotating at the same speed, is provided for in such a way that, during the variable valve control for different valve strokes, either a valve opening time point or a valve closing time point is the same for the different valve strokes and whereby, on the camshaft and/or on the control shaft, a phase shifter for shifting a phase position of valve liftings of the gas exchange valve is provided.