Patent · US Expired

Method for operating an internal combustion engine

US7293544B2 · kind B2 · utility

1Cited by

5References

14Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Goetz Brachert · Stuttgart, DE
Ruediger Herweg · Eßlingen, DE
Kai Kanning · Stuttgart, DE
Matthias Pfau · Meiningen, DE
Jochen Schaeflein · Stuttgart, DE
Hans-Juergen Weimann · Oppenweiler, DE

Key dates

Filing date	Oct 13, 2004
Grant date	Nov 13, 2007
Priority date	—
Expiry date	Oct 13, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method retains exhaust gas in the combustion chamber of an internal combustion engine and compresses the exhaust gas during a charge change. A first fuel quantity is injected into the retained exhaust gas by direct fuel injection. A second fuel quantity is subsequently fed to the combustion chamber so that a homogeneous fuel/air mixture is obtained in the combustion chamber. An auto-ignition time of the fuel/air mixture which is formed from the first and second fuel quantities is set as a function of a quantity ratio of the first fuel quantity to the second fuel quantity.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.