Patent · US Active

Method for the operation of an internal combustion engine

US7398744B2 · kind B2 · utility

0Cited by

5References

9Claims

0Family size

Assignee

Daimler AG · DE

Inventors

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

Key dates

Filing date	Jun 15, 2006
Grant date	Jul 15, 2008
Priority date	—
Expiry date	Jan 12, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S123/07
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a method of operating a 4-stroke internal combustion engine selectively in a compression ignition operation, in which an outlet valve of the internal combustion engine is closed at a comparatively early closing time point with respect to a crank angle (α) and in spark ignition operation, in which the outlet valve is closed at a comparatively late closing time point with respect to the crank angle (α), during the changeover from the spark ignition mode of operation to the compression ignition mode of operation, the closing time point of the outlet valve is transferred from the late closing time point to the early closing time point in steps distributed over multiple 4-stroke cycles.

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