Electricity: measuring and testing – Internal-combustion engine ignition system or device – In situ testing of spark plug
Patent
1993-04-26
1995-05-23
O'Shea, Sandra L.
Electricity: measuring and testing
Internal-combustion engine ignition system or device
In situ testing of spark plug
324399, 123479, 731173, F02P 1700, G01M 1500
Patent
active
054184614
ABSTRACT:
A device according to an aspect of the invention detects abnormality of spark plugs of an internal combustion engine. A value related to electric resistance across a gap between electrodes of each spark plug is measured. Next, it is determined whether or not the measured value, related to the electric resistance, assumes a value indicating that the electric resistance is below a predetermined value, when the engine is determined to be in a non-combustive state. The spark plug is determined to be abnormal when it is determined that the measured value, related to the electric resistance, assumes the value indicating that the electric resistance is below the predetermined value. A misfire-detecting system according to another aspect of the invention incorporates the above device.
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Akiyama Eitetsu
Hisaki Takashi
Ishioka Takuji
Kanehiro Masaki
Maeda Ken-ichi
Honda Giken Kogyo Kabushiki Kaisha
O'Shea Sandra L.
Patidar Jay M.
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