Camshaft drive for an internal combustion engine

US4716864A · kind A · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventor

• Robert Binder · Dresden, DE

Key dates

• Filing date: Jul 15, 1986
• Grant date: Jan 5, 1988
• Expiry date: Jul 15, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B2275/18
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The camshaft of an internal combustion engine is driven by a chain drive from an adjacent parallel intermediate shaft, which itself is driven with a toothed belt by the engine crankshaft. For a four valve cylinder head having two overhead camshafts, one camshaft is used as the intermediate shaft. By means of a hydraulic tensioning device applied at the chain drive, the relative rotating position of both camshafts and thus also the control time of the valves can be changed.