Patent ID: 7225773
Filing Date: 2007-06-05
Classification: F01L

Abstract:
1. A variable stroke valve drive for an internal combustion engine, comprising: an intermediate device for actuating a gas exchange valve; an intermediate lever having a working cam with a null lifting cam and a lifting cam, wherein the intermediate lever is mounted on a crank path of a crank arm so that the lever is slidingly movable and the working cam operatively engages the intermediate element for gas exchange valve actuation; a first adjusting device for rotating the intermediate lever about a point near the crank arm against a spring force of a spring element; and a second adjusting device, wherein the intermediate lever is displaceable with the second adjusting device along the crank path, wherein the first adjusting device has a cam plate, the radius of which increases or decreases steadily over a circumference with respect to an axis of rotation of the cam plate.