Patent · US Expired

Method of operating an internal combustion engine

US7143739B2 · kind B2 · utility

5Cited by

7References

8Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Götz Brachert · Stuttgart, DE
Rudiger Herweg · Eßlingen, DE
Matthias Pfau · Meiningen, DE
Jochen Schäflein · Stuttgart, DE
Hans-Jurgen Weimann · Oppenweiler, DE

Key dates

Filing date	Apr 25, 2006
Grant date	Dec 5, 2006
Priority date	—
Expiry date	Apr 25, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a method of operating an internal combustion engine in which exhaust gas is retained in the combustion chamber of the internal combustion engine and compressed during a charge change together with fresh combustion air, a first fuel quantity is injected into the retained exhaust gas by means of direct fuel injection, a second fuel quantity is subsequently supplied to the combustion chamber together with the fresh combustion air so that a homogeneous fuel/gas/air mixture is formed in the combustion chamber, and an auto-ignition time of the fuel/gas/air mixture is established as a function of a quantity ratio of the first fuel quantity and the second fuel quantity.

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