Patent · US Active

Method for operating an internal combustion engine

US7841326B2 · kind B2 · utility

0Cited by

14References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Roland Karrelmeyer · Bietigheim-Bissingen, DE
Christina Sauer · Memmingen, DE
Wolfgang Fischer · Eppelheim, DE
Juergen Haering · Stuttgart, DE

Key dates

Filing date	Dec 27, 2007
Grant date	Nov 30, 2010
Priority date	—
Expiry date	Dec 27, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2200/1015
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for operating an internal combustion engine working according to the Otto principle, in which fuel, particularly gasoline, is injected directly into a combustion chamber and is inflamed by self-ignition. A characteristic quantity characterizing the stability of combustion of an air/fuel mixture located in the combustion chamber is ascertained, and, as a function of the characteristic quantity, a residual gas proportion in the cylinder associated with the combustion chamber is set, in particular minimized, the residual gas proportion being reduced, preferably iteratively, as long as the characteristic quantity does not fall below a specifiable stability boundary.

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