Method for operating an internal combustion engine

US7305964B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Michael Scherrieble · Eßlingen, DE
• Siegfried Weber · Stuttgart, DE

Key dates

• Filing date: Mar 24, 2006
• Grant date: Dec 11, 2007
• Expiry date: Mar 24, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a method for operating a self ignition internal combustion engine in which fuel is injected directly into a combustion chamber by means of an injection nozzle, such that a portion of the fuel is injected into the combustion chamber as a pre-injection amount forming a homogenous pre-mixture providing for a combustion phase comprising a low temperature phase and a high temperature phase and the main fuel amount is injected into the combustion chamber during the high temperature phase of the pre-injection fuel combustion such that the ignition of the main injection amount takes place after the start and before the end of the high temperature phase.