Bayerische Motoren Werke Aktiengesellschaft

B Ayerische M Otoren W Erke a Ktiengesellschaft

Wolf Kiefer

Gerd Kraemer

Stefan Uhl

Gerhard Schulz

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.

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

A method of operating a generator in a vehicle is provided, which generator is driven by an internal-combustion engine and supplies energy to a vehicle wiring system. For improving vehicle emissions, particularly after a cold start of the internal-combustion engine, the generator is not operated immediately after the starting operation but is operated only after a defined time period such that it supplies energy to the vehicle wiring system.

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Groebenzell, Germany

Wolf Kiefer