Method of producing a mixture in the combustion chamber of an internal combustion engine

US6467453B1 · kind B1 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Johannes Ernst · Baden-Baden, DE
• Jens Froehlich · Haan, DE
• Deborah Mowll · Eßlingen, DE
• Klaus Roessler · Winnipeg, CA
• Guido Vent · Speyer, DE

Key dates

• Filing date: Sep 26, 2000
• Grant date: Oct 22, 2002
• Expiry date: Sep 26, 2020

Classification

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

Abstract

In a method for forming the mixture in a combustion space of an internal combustion engine, fuel is injected into the combustion space with a varying fuel mass flow during an operational cycle of the internal combustion engine. In one embodiment at least under certain engine operating conditions, three-stage fuel injection is carried out during the compression phase so that a main fuel quantity is injected in a first injection step, an additional fuel quantity with a reduced fuel mass flow is injected in a second injection step and an ignition fuel quantity is injected in a third injection step. In another embodiment, a fuel quantity is injected with a fuel mass flow which is reduced so that it falls steadily from a maximum initial value down to zero and, in accordance with a third method, a fuel quantity is injected during the induction phase with a fuel mass flow which is, at least at times, proportional to the air mass flow.