Patent · US Expired

Method for operating an internal combustion engine

US7406937B2 · kind B2 · utility

4Cited by

9References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Andre-Francisco Casal Kulzer · Eppelheim, DE
Jochen Laubender · Ingolstadt, DE
Udo Sieber · Bietigheim, DE

Key dates

Filing date	Jun 24, 2003
Grant date	Aug 5, 2008
Priority date	—
Expiry date	Feb 25, 2024

Classification

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

Abstract

A method for operating an internal combustion engine having at least one triggerable intake valve and at least one triggerable discharge valve, in which the internal combustion engine is directly started in a start-up operating mode and, following the start, is operated in at least one other operating mode. A starting discharge instant of a discharge valve of the internal combustion engine that is used during the start-up operating mode is retarded in time with respect to a standard discharge instant so as to improve the direct start-up characteristics of the internal combustion engine. In addition, to further improve the direct start-up characteristics, it is possible to retard a closing instant of an intake valve that is used during the start-up operating mode with respect to a standard closing instant.

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