Patent · US Active

Method for monitoring the functionality of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine

US7997066B2 · kind B2 · utility

0Cited by

3References

14Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Gerd Kraemer · Kohlhof, DE
Stefan Uhl · Fellbach, DE
Wolf Kiefer · Puchheim, DE
Gerhard Schulz · Ludwigshafen, DE

Key dates

Filing date	Feb 19, 2008
Grant date	Aug 16, 2011
Priority date	—
Expiry date	Apr 4, 2030

Classification

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

Abstract

The diagnosis of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine is described. The system includes monitoring the actual ignition angle intervention. A current ignition angle is acquired over a specified time and converted into a torque model used for catalytic converter heating. Using the torque model, a degree of fulfillment of executed catalytic converter heating measures is obtained and an error signal is generated by comparing the obtained degree of fulfillment to a limiting value.

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