Audi Ag

Stefan Dengler

Markus Sonner

Ralf Budack

Michael Kuhn

Rainer Wurms

Marc Deblaize

Michael Groß

An assembly including a rotatable shaft with external splines and an annular member receiving such shaft, provided with internal splines meshing with the external splines of such shaft wherein the external splines of different segments of the shaft are configured to effectively transmit torque in use and facilitate the mounting of the shaft into the annular member in assembly.

Splined-shaft connection and valve timing mechanism with a splined-shaft connection between a camshaft and displaceable cam carriers

The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (). The invention also relates to an internal combustion engine for carrying out said method.

Method for operating an internal combustion engine, and internal combustion engine for carrying out said method

The invention relates to valve train of an international combustion engine, which comprise axially displaceable cam elements. The inventive valve train is characterized in that one cam element comprises at least two cams which in turn comprise at least two cam tracks. The first cam and the at least second cam of a cam element differ in at least one cam track.

Valve train of an internal combustion engine comprising at least one camshaft

The invention relates to a valve drive of an internal combustion engine, comprising at least one camshaft whereon at least one cam carrier is arranged in a rotationally fixed and axially displaceable manner. Means for applying axial tension are formed between the at least one camshaft and the at least one cam support, thereby enabling the at least one cam support to be fixed in an axial manner.

Valve drive of an internal combustion engine comprising a cylinder head

The invention relates to a variable valve train for reciprocating engines, in particular internal combustion engines comprising at least one cam of a camshaft that is rotatably mounted in the cylinder head. Said cam actuates a lift valve using a pulley assembly which can be displaceably guided in a sliding-block part along an adjusting inclined plane, together with a valve actuating element which is connected in series. The valve stroke can be adjusted in a variable manner in relation to the cam by the displacement of the sliding-block part and the pulley assembly is elastically pre-tensioned in relation to the cam. To achieve a sturdy valve train which exhibits uniform valve accelerations, a free travel (s) that allows an excitation movement of the pulley assembly is provided between the cam heel and the valve actuating element. The valve actuating element is configured as a two-part cam follower with a rocker action and the sliding-block part has a sliding-block guide comprising an additional excitation inclined plane for the pulley assembly.

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Ingolstadt, Germany

Stefan Dengler