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

Hydraulik-Ring Gmbh

Sap Se

Wolfgang Stephen

Alfred Trzmiel

Axel-Willi Jochim

A device for relative rotational angle changing of the camshaft of an internal combustion engine relative to its drive wheel has an inner part connected with ribs or vanes that is located rotationally movably in a compartmented wheel. This driven compartmented wheel has a plurality of compartments distributed around the circumference divided by ribs or vanes into two pressure chambers each, and with the change in rotational angle being produced by their pressurization. To minimize the influence of overlapping alternating torque influences from the valve drive of the internal combustion engine, damping structure is integrated into this device to damp the change in rotational position change hydraulically.

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Boll, Germany

Wolfgang Stephen