Internal combustion engine with direct fuel injection

US6543408B1 · kind B1 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Johannes Ernst · Baden-Baden, DE
• Bernhard Heel · Lauterbourg, FR
• Rolf Klenk · Stuttgart, DE
• Frank Otto · Hilden, DE
• Klaus Rössler · Altbach, DE
• Guido Vent · Speyer, DE

Key dates

• Filing date: Feb 6, 2002
• Grant date: Apr 8, 2003
• Expiry date: Feb 6, 2022

Classification

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

Abstract

In internal combustion engines with direct fuel injection an injector injects fuel into the combustion chamber to form an ignitable fuel/air mixture with separately supplied combustion air, with the mixture to be ignited by a spark plug. The fuel is injected in a cone shape and the electrodes are protected from being wetted with fuel and coking if they are disposed outside the lateral surface of the conical fuel jet generated by the injection nozzle. In order to bring ignitable mixture between the electrodes and to ensure optimal operating behavior of the internal combustion engine by improving the combustion sequence, a combustion chamber configuration is provided such that the conical fuel jet is injected in a free jet which is substantially uninfluenced by the combustion chamber perimeter, and the electrodes of the spark plug project into a fuel vortex extending from the lateral surface during injection.