Self-igniting internal combustion engine

US7059295B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Matthias Blessing · Frastanz, AT
• Gerhard Koenig · Newton, US
• Christian Krueger · Stuttgart, DE
• Ruediger Preiss · Winnenden, DE
• Alois Raab · Aalen, DE
• Martin Schnabel · Aalen, DE

Key dates

• Filing date: Mar 8, 2003
• Grant date: Jun 13, 2006
• Expiry date: Mar 8, 2023

Classification

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

Abstract

A method is provided for operating an internal combustion piston engine, in which fuel is injected directly into a working chamber in the form of a pre-injection and main injection by means of an injection nozzle with a plurality of injection holes. The pre-injection takes place in a clocked manner. In order to minimize the moistening of the walls of the combustion chamber, a higher fuel pressure prevails in an injection device during the main injection than during the pre-injection. Furthermore, optimum homogenization of the pre-injected quantity of fuel is obtained by restricting the range of the injected fuel jets while simultaneously maximizing the atomization of the fuel particles and reinforcing the disintegration of the fuel jets during the clocked pre-injection.