Valve stroke control for internal combustion engines of motor vehicles

A valve stroke control for an internal combustion engine of a motor vehicle, the valve stroke control comprising:

• at least one control device for adjusting a stroke of a valve and configured to interact with at least one camshaft;
• at least one control shaft interacting with the at least one control device;
• wherein the at least one control device is configured to the actuated by a hydraulic medium;
• wherein the at least one control device comprise a first control element and a second control element movable relative to one another;
• a rocker lever adapted to be acted on by the at least one camshaft, wherein the first control element is supported on the rocker lever and wherein the second control element is supported on the at least one control shaft;
• wherein the rocker lever has a first arm adapted to engage the camshaft and wherein the second control element engages the rocker lever approximately at half the length of the rocker lever.

A value stroke control for an internal combustion engine of a motor vehicle, the valve stroke control comprising:

• at least one control device for adjusting a stroke of a valve and configured to interact with at least one camshaft;
• at least one control shaft interacting with the at least one control device;
• wherein the at least one control device is configured to be actuated by a hydraulic medium;
• wherein the at least one control device comprises a first control element and a second control element movable relative to one another;
• wherein the first control element is a hollow cylinder comprised of a cylinder bottom and a cylinder wall connected to the cylinder bottom;
• wherein the second control element is a hollow piston comprising a piston bottom and a piston wall connected to the piston bottom;
• wherein the hallow piston is inserted into the hollow cylinder such that the piston bottom is positioned remote from the cylinder bottom and the piston wall extends from the piston bottom in a direction toward the cylinder bottom and the cylinder wall extends from the cylinder bottom toward the piston bottom;
• wherein the hallow cylinder and the hollow piston delimit a common hollow interior containing hydraulic medium;
• a pressure spring arranged inside the hollow interior and supported with a first spring end on the piston bottom and with a second spring end on the cylinder bottom:
• wherein the cylinder wall has at least one opening;
• wherein the at least one opening is closable by the piston wall;
• wherein the at least one opening connects the hollow interior to a hydraulic medium source for hydraulic medium.