Patent · US Active

Method and device for monitoring an exhaust gas recirculation system

US7881858B2 · kind B2 · utility

16Cited by

2References

13Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Tobias Kress · Stuttgart, DE
Stefan Michael · Markgröningen, DE
Wilhelm Blumendeller · Freiberg, DE
Horst Mueller · Rio Rancho, US

Key dates

Filing date	Aug 27, 2009
Grant date	Feb 1, 2011
Priority date	—
Expiry date	Aug 27, 2029

Classification

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

Abstract

A method for the diagnosis of an exhaust gas recirculation system in an internal combustion engine, including providing a pressure difference reading, which gives a pressure difference in an air supply section of the internal combustion engine or a pressure difference over the exhaust gas recirculation system; determining a pressure difference reference value as a function of one or more operating variables of the internal combustion engine; and detecting a fault in the exhaust gas recirculation system as a function of the pressure difference reading and of the pressure difference reference value.

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