Method for operating and internal combustion engine

US7263982B2 · kind B2 · utility

Assignee

• Diamler Chrysler AG · DE

Inventors

• Götz Brachert · Stuttgart, DE
• Rudiger Herweg · Eßlingen, DE
• Kai Kanning · Stuttgart, DE
• Matthias Pfau · Meiningen, DE
• Jochen Schäflein · Stuttgart, DE
• Hans-Jurgen Weimann · Oppenweiler, DE

Key dates

• Filing date: Apr 25, 2006
• Grant date: Sep 4, 2007
• Expiry date: Apr 25, 2026

Classification

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

Abstract

In a method of operating a supercharged internal combustion engine in which exhaust gas is retained in the combustion chamber during a charge change, wherein the engine is operated with compression ignition or with spark ignition depending on the operating point and in which a charge pressure can be established for the fresh air supplied to the combustion chamber, and the exhaust gas is compressed during the charge change, and a first fuel quantity is optionally injected into the retained exhaust gas and a second fuel quantity is subsequently supplied to the combustion chamber, such that a homogeneous fuel/air mixture is formed in the combustion chamber, the retained exhaust gas quantity in the combustion chamber is corrected in such a way that the center of the combustion is displaced in the direction toward a set point value when the center of the combustion deviates from the set point value because of a change in the charge pressure of the fresh air or because of a change in the temperature of the fresh air.