Gasoline internal combustion engine

US5915349A · kind A · utility

Assignee

• Daimler-Benz AG · DE

Inventors

• Andreas Biemelt · Schwaikheim, DE
• Peter Hohner · Echterdingen, DE
• Karl Günter · Eßlingen, DE
• Helmut Schorn · Bad Liebenzell, DE

Key dates

• Filing date: Feb 23, 1998
• Grant date: Jun 29, 1999
• Expiry date: Feb 23, 2018

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 gasoline internal combustion engine with direct fuel injection a spark plug with a center electrode is mounted in the cylinder top so as to project into the combustion chamber. A mass electrode is disposed on the piston so as to project upwardly into the combustion chamber and is movable with the piston toward and from the spark plug center electrode. An ignition system is provided for timely generating a spark between the spark plug electrode and the movable mass electrode for igniting a fuel/air mixture in the combustion chamber. A fuel injector is mounted in the cylinder top and adapted to provide a cone-like fuel beam with an envelope disposed between the spark plug electrode and the mass electrode such that a spark generated between the two electrodes extends through the fuel injection beam envelope.