Spark plug cap with ignition voltage detective capacitor for int

Details Spark plug cap with ignition voltage detective capacitor for int Spark plug cap with ignition voltage detective capacitor for int

1993-11-09

1996-01-30

Paumen, Gary F.

Electrical connectors

Having spark or glow plug cover

324402, 324399, F02P 1700

Patent

active

054876761

ABSTRACT:
A spark plug cap covering the terminal of a spark plug for an internal combustion engine, made up of an insulative cap body, an ignition coil unit case housing the coil and having a terminal for the ignition coil, a first conductive shaft housed in the insulative cap body for carrying an ignition voltage produced by the ignition coil to the spark plug terminal, and a second conductor located around the first conductor keeping a predetermined distance therefrom separated by the insulative material of the cap body such that a capacitor is formed between the first and second conductors for detecting the ignition voltage. The cap is further provided with a first contact in the form of an annulus provided at the end of said insulative cap body and electrically connected with said second conductor, and a second contact in the shape of a leaf spring electrically connected with the terminal of said case, such that the second contact is brought into contact with the first contact when said case is threaded into said insulative cap body, thereby ensuring electrical connection therebetween.

REFERENCES:
patent: 5317267 (1994-05-01), Miyata et al.
patent: 5363046 (1994-11-01), Shimasaki et al.
patent: 5391100 (1995-02-01), Maruyama et al.
patent: 5419300 (1995-05-01), Maruyama et al.

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