Misfire detector for detecting misfire of internal...

Details Misfire detector for detecting misfire of internal... Misfire detector for detecting misfire of internal...

2006-08-29

2006-08-29

Dolinar, Andrew M. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S111000, C073S116070

Reexamination Certificate

active

07099769

ABSTRACT:
A misfire detector for an internal combustion engine sets an operating state of the internal combustion engine as a parameter and detects misfire based on the parameter. The misfire detector includes a friction-torque estimating unit and a misfire determining unit. The friction-torque estimating unit estimates indicated torque and inertial torque of the internal combustion engine when the load of the internal combustion engine is stable, obtains a difference between the indicated torque and the inertial torque, and estimates friction torque of the internal combustion engine using the difference. The misfire determining unit determines misfire by correcting the parameter using the friction torque estimated.

REFERENCES:
patent: 6223120 (2001-04-01), Williams
patent: 4-101071 (1992-04-01), None
patent: A 04-265475 (1992-09-01), None
patent: A 10-331707 (1998-12-01), None

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