Patent · US Expired

Method for operating an internal combustion engine

US7347180B2 · kind B2 · utility

0Cited by

6References

5Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Gots 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	Mar 25, 2008
Priority date	—
Expiry date	Apr 25, 2026

Classification

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

Abstract

In a method for operating an internal combustion engine having a variable compression ratio either in a compression ignition or in a spark ignition operating mode depending on the engine operating point, a higher compression ratio is provided in the compression ignition mode than in the spark ignition mode so as to optimize the operation of the internal combustion engine at low and medium engine loads, and to reduce engine emissions.

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