Patent · US Active

Method of operating an internal combustion engine with direct fuel injection

US7204228B2 · kind B2 · utility

8Cited by

3References

7Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Michael Oechsle · Sindelfingen, DE
Christopf Lux · Stuttgart, DE

Key dates

Filing date	Oct 2, 2006
Grant date	Apr 17, 2007
Priority date	—
Expiry date	Oct 2, 2026

Classification

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

Abstract

In a method of operating a spark ignition internal combustion engine with direct fuel injection wherein combustion air is supplied to a combustion chamber, fuel is injected into the combustion air during an intake stroke via a fuel injector in a pilot injection using a first fuel quantity so as to from a homogeneous lean air/fuel mixture in substantially the entire combustion chamber, in a main injection subsequently a second fuel quantity is injected in multiple injection steps just before ignition time so as to form a stratified rich air/fuel mixture in the area of a spark plug and the stratified fuel charge is then ignited 2° CA to 10° CA after completion of the injection of the main stratified injection.

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