Misfire detection apparatus of internal combustion engine

Details Misfire detection apparatus of internal combustion engine Misfire detection apparatus of internal combustion engine

2006-06-13

2006-06-13

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S110000, C701S115000, C123S406590, C123S406650, C073S035080

Reexamination Certificate

active

07062373

ABSTRACT:
A misfire detection apparatus of an internal combustion engine. The misfire detection apparatus includes an angle sensor for detecting rotation angle of the internal combustion engine, an ECU for performing fuel injection and ignition control based on rotation information of the angle sensor, an ignition coil for generating a high voltage for ignition based on a drive signal from the ECU, and an spark plug, as the high voltage for ignition of the ignition coil is applied, for generating an ignition spark and igniting an air fuel mixture. The misfire detection apparatus applies a bias voltage to the spark plug, detects an ion current, makes a misfire determination based on the ion current detection, and makes a failure determination based on time change of rotation information of the internal combustion engine when misfires occur successively in a specific cylinder of the internal combustion engine.

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patent: 2003-314423 (2003-11-01), None

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