Four-stroke cycle internal combustion engine

US5379738A · kind A · utility

Inventors

• Franz Laimbock · Gratwein-Straßengel, AT
• Alexander Fürschuss · Ansfelden, AT

Key dates

• Filing date: Nov 15, 1993
• Grant date: Jan 10, 1995
• Expiry date: Nov 15, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A four-stroke cycle internal combustion engine comprises at least two inlet valves and a correspondingly branched intake line. In order to ensure that a high power and a more favorable specific fuel combustion will be achieved at high speeds and a reduced fuel consumption and a lower emission of exhaust gas will be achieved particularly at low speeds and under partial loads. A rotary valve, which has at least two passages, which are associated with respective intake branch lines and are as straight as possible and lead to respective inlet valves, is provided downstream of the junction where the intake line is branched. The internal combustion engine also comprises at least one additional pipe section, which in one position of the rotary valve is connected by the rotary valve between one intake branch line and one of the passages which is then open whereas the rotary valve then shuts off the other passage or passages.