Electricity: measuring and testing – Internal-combustion engine ignition system or device – Apparatus for coupling a measuring instrument to an ignition...
Patent
1993-02-02
1994-11-08
Strecker, Gerard R.
Electricity: measuring and testing
Internal-combustion engine ignition system or device
Apparatus for coupling a measuring instrument to an ignition...
324126, 324393, F02P 1700, F23Q 2300, G01R 1900
Patent
active
053630467
ABSTRACT:
A spark plug cap having a capacitor for detecting ignition voltage of an internal combustion engine to determine if misfire occurs. The spark plug cap covers the terminal of a spark plug and has a conductor for carrying ignition voltage current from an ignition coil to spark plug terminals to generate an electronic spark between spark plug electrodes and an insulator surrounding the conductor. In the spark plug cap, a second conductor is located around the first conductor keeping a predetermined distance from the first conductor such that a capacitor, which constitutes a capacitance divider with a capacitor for ignition voltage detection, is formed between the first and the second conductors. A ceramic insulator may be positioned between the first and the second conductors to provide higher insulation property.
REFERENCES:
patent: 2181149 (1939-11-01), Peters et al.
patent: 3390331 (1968-06-01), Brown et al.
patent: 3538440 (1970-11-01), Galloway
patent: 3657650 (1972-04-01), Arndt
patent: 4013334 (1977-03-01), Behnke
patent: 4306187 (1981-12-01), Kinder
Baba Shigeki
Hisaki Takashi
Ishioka Takuji
Kanehiro Masaki
Maruyama Shigeru
Honda Giken Kogyo Kabushiki Kaisha
Strecker Gerard R.
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