Patent · US Expired

Method for operating a spark ignition engine with direct fuel injection

US6390056B1 · kind B1 · utility

8Cited by

4References

4Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Andreas Hertzberg · Markgröningen, DE
Klaus Rössler · Altbach, DE
Guido Vent · Speyer, DE

Key dates

Filing date	Sep 11, 2000
Grant date	May 21, 2002
Priority date	—
Expiry date	Sep 11, 2020

Classification

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

Abstract

In a method for operating a spark ignition engine with direct fuel injection, in which the engine is operated either with charge stratification or with a homogeneous charge, the open and/or closed positions of the inlet and exhaust valves are controlled with variable timing depending on the engine operating condition. The timings are determined on the basis of basic timing settings, which are provided in basic timing performance graphs for operation with charge stratification and homogeneous charge operation. The basic timing settings are modified by means of correction values to raise the temperature of the exhaust gas for internal exhaust-gas recirculation and for causing a movement of the charge in the cylinders.

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