Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Georg Talan

Dietmar Schwarzenthal

Manfred Batzill

Wolfgang Zücker

Daniel Semmler

A valve drive of an internal combustion engine, with a camshaft including cams for actuating gas-exchange valves, wherein at least one cam, which includes several cam faces, is guided nonrotatably but with freedom of axial movement on the camshaft; wherein a stroke profile, which cooperates with an actuating pin for the axial displacement of the cam or cam piece, is assigned to the associated axially displaceable cam or an axially displaceable cam piece comprising several cams; and wherein the stroke profile of the axially displaceable cam or cam piece in question includes intersecting stroke curves. A guide element is assigned to the end of the actuating pin which can be introduced into the stroke curve of the stroke profile of the associated axially displaceable cam or cam piece, this guide element being supported in such a way that it can rotate or pivot around the axis of the actuating pin.

Valve drive of an internal combustion engine

A valve drive of an internal combustion engine with a camshaft including cams for actuating gas-exchange valves, wherein at least one cam, comprising several cam faces, is guided nonrotatably but with freedom of axial movement on the camshaft, wherein a stroke profile, which cooperates with an actuating pin for the axial displacement of the cam, is assigned to the associated axially displaceable cam, and wherein the stroke profile of the axially displaceable cam in question comprises several stroke curves. A first stroke curve and a second stroke curve of the stroke profile are contoured both in the axial direction and in the radial direction such that the contour in the axial direction of the stroke profile of the camshaft is responsible for a defined axial displacement of the associated cam, and the contour in the radial direction of the stroke profile of the camshaft prevents the stroke curves from colliding.

A switching resonance intake system is provided an internal combustion engine with a first and a second cylinder bank. The cylinder banks are each coordinated with a resonance container with a group of swing pipes leading to the cylinders, and the resonance containers are joined together by resonance pipes provided with switching valves. In the intake system, the swing pipes coordinated with the one cylinder bank are connected to the resonance container adjacent to the other cylinder bank. The intake system is intended for use in an internal combustion engine with cylinder banks having a V-layout.

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Urbach, Germany

Georg Talan