Method for generating a homogeneous mixture for auto-ignition internal combustion engines and for controlling the combustion process

US6543411B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Alois Raab · Aalen, DE
• Martin Schnabel · Aalen, DE

Key dates

• Filing date: Feb 23, 2001
• Grant date: Apr 8, 2003
• Expiry date: Feb 23, 2021

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 generating a homogeneous mixture for auto-ignition internal combustion engines and for controlling the combustion process, the internal combustion engine having an injection system and at least one cylinder/piston unit connected to an intake device, includes the steps of:a) exhaust-gas recirculation of hot exhaust gas from a previous combustion cycle into the combustion space or into the intake device or exhaust-gas retention of this exhaust gas in the combustion space or in the intake device;b) injection of fuel by the injection system into the retained or recirculated hot exhaust gas in order to generate a homogeneous fuel/air mixture; andc) cooling of the homogenized fuel/air mixture by expansion cooling or by isentropic compression in the respective cylinder/piston unit and/or by expansion cooling or by external cooling of a fuel/air mixture homogenized in at least one further cylinder/piston unit and recirculation of the cooled fuel/air mixture into the intake device.