Method for operating a multicylinder internal combustion engine and device for carrying out the method

US5964201A · kind A · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Guido Dickers · Rheydt, DE
• Klemens Grieser · Langenfeld, DE
• Patrick Phlips · Cologne, DE
• Thomas Mayer · Reutlingen, DE

Key dates

• Filing date: Mar 19, 1998
• Grant date: Oct 12, 1999
• Expiry date: Mar 19, 2018

Classification

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

Abstract

The invention relates to a method for operating a multicylinder internal combustion engine having a device, preferably an asymmetric swirl valve, located in the cylinder inlet passage and selectively movable by means of a control unit from a starting position into an effective position, for influencing the flow conditions in the cylinder inlet passage. In known methods the swirl control valve is brought into its effective position in a predetermined rotational speed/torque region and the engine is operated with a stoichiometric or rich mixture. Outside this region the swirl control valve is brought into its starting position and the engine is operated using a substantially stoichiometric or rich mixture. In contrast to this, a saving in fuel is obtained by bringing the swirl control valve into the starting position in a second predetermined rotational speed/torque region lying outside the predetermined first rotational speed/torque region and at the same time operating the internal combustion engine using a lean mixture.