Patent · US Active

Method for operating an internal combustion engine and a device for carrying out the method

US7428809B2 · kind B2 · utility

6Cited by

13References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Stefan Wickert · Albershausen, DE
Torsten Handler · Stuttgart, DE
Dirk Samuelsen · Ludwigsburg, DE
Christian Walz · Durmersheim, DE

Key dates

Filing date	Sep 26, 2005
Grant date	Sep 30, 2008
Priority date	—
Expiry date	Aug 10, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method for operating an internal combustion engine; in the exhaust area of this engine there is at least one catalytic converter and downstream from the catalytic converter there is an NOx sensor. A device for carrying out this method is also provided. The NOx sensor has a cross-sensitivity to a reagent needed in the catalytic converter. In predefined operating states of the internal combustion engine, e.g., idling and/or overrun, a selection signal is supplied; when this selection signal occurs, the sensor signal supplied by the NOx sensor is interpreted as at least a measure of the reagent leakage.

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