Device for hydraulically adjusting the angle of rotation of a shaft in relation to a driving wheel

US6390043B1 · kind B1 · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Bernd Niethammer · Jeffery Road, DE
• Andreas Knecht · Herrenberg, DE

Key dates

• Filing date: Jan 26, 2001
• Grant date: May 21, 2002
• Expiry date: Jan 26, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2102
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for changing the angle of rotation of a camshaft of an internal combustion engine relative to a driving wheel. The device includes an inner part, which is provided with bridges or wings, and is disposed rotationally movable in a cell wheel. The driven cell wheel has several bridges, which are distributed over the periphery and divided by bridges or wings of the inner part into in each case two pressure spaces. The change in the angular position is caused by applying pressure on or relieving pressure from the two pressure spaces. As an end position is approached, the adjusting movement is damped hydraulically by integrated damping means. These damping means are formed by the interaction of the mutually approaching bridges of the inner part and of the cell wheel.