Electricity: measuring and testing – Internal-combustion engine ignition system or device – In situ testing of spark plug
Patent
1992-10-01
1995-03-14
Strecker, Gerard R.
Electricity: measuring and testing
Internal-combustion engine ignition system or device
In situ testing of spark plug
731173, 324393, F02P 1700
Patent
active
053979907
ABSTRACT:
In an ion current detecting device for an internal combustion engine, an ion current detecting circuit for detecting an ion current produced when the gas mixture is burnt by spark discharges between the electrodes of a spark plug operates to mask the detection signal of the ion current for predetermined periods of time in the intervals in which noise pulses are produced in association with excitation and unexcitation of ignition coil. Hence, the noise pulses are eliminated from the detection signal, whereby it can be positively determined from the presence or absence of the detection signal whether or not the gas mixture has been burnt.
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Wenzlawski et al., "Ionenstrommessung an Zundkerzen von Ottomotoren als Klopferkennungsmittel," MTZ Motortechnische Zeitschrift, vol. 51, No. 3, pp. 118-122.
Mitsubishi Denki & Kabushiki Kaisha
Strecker Gerard R.
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