Compression ignition internal combustion engine

US7513239B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Matthias Blessing · Frastanz, AT
• Harald Braun · Eßlingen, DE
• Frank Keller · Tampa, US
• Gerhard Koenig · Newton, US
• Christian Krueger · Stuttgart, DE
• Alois Raab · Aalen, DE

Key dates

• Filing date: Jun 25, 2004
• Grant date: Apr 7, 2009
• Expiry date: Jun 25, 2024

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 for operating an internal combustion engine, injects fuel directly into a combustion chamber as a main injection, a postinjection and optionally also as a preinjection. An injection nozzle with a plurality of injection bores effects the preinjection and the postinjection preferably which is carried out cyclically. To minimize wetting of the combustion chamber walls, during the postinjection the partial quantities of fuel and a lift of the nozzle needle of the injection nozzle are set so that, for each partial quantity of the postinjection injected into the combustion chamber, the reach of the respective fuel jet in the combustion chamber is limited and the reach is less than the distance to a combustion chamber boundary.