Patent · US Active

Method and device for diagnosis of an exhaust gas cleaning system

US7484407B2 · kind B2 · utility

7Cited by

7References

17Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Tino Arlt · Regensburg, DE
Krzysztof Korbel · Regensburg, DE
Gerd Rösel · Dresden, DE

Key dates

Filing date	Jul 20, 2006
Grant date	Feb 3, 2009
Priority date	—
Expiry date	Sep 17, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The invention is distinguished by a method and a corresponding device for diagnosis of an individual catalytic converter of an exhaust gas purification unit assigned to an internal combustion engine in the Y configuration, despite the lack of exhaust gas probe between the individual catalytic converter and a main catalytic converter. The diagnosis proceeds on the basis of signals from the exhaust gas probes belonging to the exhaust gas purification unit. On the basis of these signals, the oxygen storage capacity of the individual catalytic converter is determined despite the lack of exhaust gas probe between the individual catalytic converter and the main catalytic converter.

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