Variable mechanical valve control for an internal combustion engine

A variable mechanical valve control for an internal combustion engine having an underhead camshaft for adjusting a valve stroke and an opening and closing time of at least one intake and/or exhaust gas exchange valve, comprising:

• a transmission gear and at least one tappet push rod,
• a lever driven by a camshaft for actuating the intake and/or exhaust valve,
• an intermediate lever linked to a tappet push rod via an axle 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 a slide gate, whereby a first contact surface on the intermediate lever is supported on one of an eccentric shaft or a second contact surface and the lever is movable over an operating curve, by means of which the gas exchange valve is opened and/or closed, and whereby, on a tappet provided on the tappet push rod, means are provided for additional shifting of a phase position of valve liftings of the gas exchange valve with simultaneous play-free adjustment of the valve stroke and means are provided for additional independently controllable valve stroke opening and closing for each camshaft revolution,
• wherein, depending on a displacement of an axial position of the tappet push rod with the tappet in opposing directions in relation to a central axis of the camshaft, the valve opening time points or the valve closing time points are differently adjustable.