Direct-injection spark-ignition internal combustion engine

US7143738B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Benedikt Ganz · Durmersheim, DE
• Jean-Francois Gaudry · Stuttgart, DE
• Hans Hartmann · Stuttgart, DE
• Rolf Klenk · Stuttgart, DE
• Andreas Mleinek · Stuttgart, DE
• Klaus Robler · Stuttgart, DE
• Helmut Scheffel · Holzgerlingen, DE
• Dirk Strubel · Stuttgart, DE
• Matthias Zahn · Riedstadt, DE

Key dates

• Filing date: Jun 20, 2005
• Grant date: Dec 5, 2006
• Expiry date: Jul 8, 2025

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 direct-injection spark-ignition internal combustion engine having one injector per cylinder for injecting fuel into a combustion chamber, wherein the injector has an injection nozzle with a plurality of injection holes which are distributed over its circumference, so that the jets of fuel from the injection holes form during an injection process a conical cloud of fuel, the piston opposite the injection nozzle includes a piston recess provided with a plurality of radial cavities extending from the recess radially into the piston head for receiving fuel injected into the combustion chamber.