Patent · US Active

Method for diagnosing additional valves

US8683986B2 · kind B2 · utility

2Cited by

5References

20Claims

0Family size

Assignee

Mahle International GmbH · DE

Inventors

Alfred Elsässer · Keltern, DE
Marco Warth · Schorndorf, DE

Key dates

Filing date	Dec 5, 2008
Grant date	Apr 1, 2014
Priority date	—
Expiry date	Dec 6, 2030

Classification

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

Abstract

A method for adjusting an exhaust gas recycling rate in an internal combustion engine exhaust gas recycling system, comprising: arranging the exhaust gas recycling system in at least one of a fresh gas line, an exhaust gas line, and an exhaust gas recycling line of the internal combustion engine; actuating at least one additional valve; adjusting the at least one additional valve temporarily by changing the operation of the internal combustion engine based on an exhaust gas rate associated with a current operating point of the internal combustion engine; diagnosing the at least one additional valve; and evaluating the change of at least one engine operating parameter dependent on the exhaust gas recycling rate.

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