Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr

Jochen Luedemann

Uwe Parsche

Andreas Werler

Joerg Wutzler

Thomas Arnold

An adjusting shaft actuating device of a valve train for internal combustion engines includes a cam unit with first and second cams rigidly connected thereto. The second cam is spaced apart from the first cam in axial and peripheral directions. The device also includes a lever unit non-rotatably arranged on an adjusting shaft with first and second lever arms rigidly connected thereto. The second lever arm is spaced apart from the first lever arm in axial and peripheral directions. The first and second cams are configured to be brought into respective operative connections with the first and second lever arms by an axial alignment between the cam unit and lever unit. The first and second cams and the first and second lever arms are arranged such that the first operative connection and the second operative connection are produced during a rotation of the adjusting shaft in a temporally consecutive manner.

Adjustment shaft activation of a valve operation for combustion engines for operating gas exchange valves

A valve drive device for switching the stroke of gas exchange valves of an internal combustion engine includes a camshaft configured, at least in part, as a hollow shaft. A cam unit includes at least two different cams disposed on the camshaft so as to be rotationally engaged and axially displaceable with respect thereto. An adjustment sleeve is disposed so as to be rotationally engaged on an adjustment shaft and rotatable and axially displaceable inside the camshaft. The adjustment sleeve includes thereon a closed adjustment contour extending about a circumference of the adjustment sleeve and is operatively connected to the cam unit through an adjustment clearance in the camshaft via a first coupling element configured to permanently engage in the adjustment contour. A further coupling element is configured to permanently engage in the adjustment contour and connect to the camshaft so as to be fixed in position.

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Chemnitz, Germany

Jochen Luedemann