Method of detecting combustion misfires

Details Method of detecting combustion misfires Method of detecting combustion misfires

1997-03-17

1999-01-19

Dougherty, Elizabeth L.

Measuring and testing

Vehicle chassis

Steering

701111, G01M 1500

Patent

active

058615539

ABSTRACT:
The invention is directed to a method for detecting combustion misfires in a multi-cylinder internal combustion engine, the method comprising the steps of: determining the rough-running values for the engine individual to the cylinders; determining a quantity for the level of a subset of the rough-running values; forming a reference value by logically coupling the quantity with an offset; and, comparing the rough-running values to the reference value and evaluating a passthrough of the reference value as a misfire.

REFERENCES:
patent: 5263365 (1993-11-01), Muller et al.
patent: 5495774 (1996-03-01), Klauber et al.
patent: 5513521 (1996-05-01), Klenk et al.
patent: 5542291 (1996-08-01), James
patent: 5691469 (1997-11-01), Mezger et al.
patent: 5726352 (1998-03-01), Mezger et al.

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