Misfire detector using linear detection of crankshaft...

Details Misfire detector using linear detection of crankshaft... Misfire detector using linear detection of crankshaft...

2007-04-03

2007-04-03

McCall, Eric S. (Department: 2855)

Measuring and testing

Vehicle chassis

Steering

Reexamination Certificate

active

11097318

ABSTRACT:
A misfire detector detects a misfire in a cylinder based on a maximum value and the minimum value of the angular speed. A first crank angle range is defined in such a manner as to include a crank angle in which the angular speed is maximum during a power stroke. A second crank angle range is defined in such a manner as to include a crank angle in which the angular speed is minimum during the power stroke. The maximum value of the angular speed is calculated within the first crank angle range, and the minimum value of the angular speed is calculated within the second crank angle range. The calculated maximum and minimum values are brought close to actual values to enhance a reliability of the misfire detector.

REFERENCES:
patent: 5245865 (1993-09-01), Kayanuma
patent: 5245866 (1993-09-01), Hashiguchi et al.
patent: 5287737 (1994-02-01), Osawa et al.
patent: 5309756 (1994-05-01), Osawa et al.
patent: 5499537 (1996-03-01), Nakayama et al.
patent: A-9-32620 (1997-02-01), None
patent: A-2000-205035 (2000-07-01), None

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