Method for operating an internal combustion engine

Details Method for operating an internal combustion engine Method for operating an internal combustion engine

2007-12-11

2007-12-11

McCall, Eric S. (Department: 2855)

Measuring and testing

Vehicle chassis

Steering

C073S035090

Reexamination Certificate

active

11498396

ABSTRACT:
In an internal combustion engine, a structure-borne noise generated in a combustion chamber is detected by a structure-borne noise sensor. A quantity is ascertained on the basis of the structure-borne noise signal. A reference quantity of an undrifted structure-borne noise sensor is ascertained for a certain reference operating state for the combustion chamber, during continuous operation of the engine the quantity is ascertained for the reference operating state, and from a change over time of the ascertained quantity with respect to the reference quantity, a drift of the structure-borne noise sensor is ascertained.

REFERENCES:
patent: 7257479 (2007-08-01), Damitz et al.
patent: 7260469 (2007-08-01), Birk et al.
patent: 7269498 (2007-09-01), Damitz et al.
patent: 2005/0145214 (2005-07-01), Damitz et al.
patent: 2006/0064230 (2006-03-01), Damitz et al.
patent: 2006/0085119 (2006-04-01), Damitz et al.
patent: 2006/0122766 (2006-06-01), Schueler
patent: 2007/0050124 (2007-03-01), Birk et al.
patent: 198 45 232 (2000-04-01), None

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