Sparkplug voltage probe device having a capacitance compensating

Details Sparkplug voltage probe device having a capacitance compensating Sparkplug voltage probe device having a capacitance compensating

1994-06-20

1996-02-13

O'Shea, Sandra L.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

Apparatus for coupling a measuring instrument to an ignition...

324393, 324126, 324149, F02P 1700, G01R 19165, G01R 106, G01R215003

Patent

active

054914175

ABSTRACT:
In a sparkplug voltage probe device, an insulator base is attached to the internal combustion engine, an upper surface of the insulator base having a plurality of grooves in which the corresponding cables are placed. An electrode plate is embedded in the insulator base along the grooves to form a static capacity between the electrode plate and an array of all the cables in the grooves, both of the longitudinal sides of the electrode plate being curled around the outermost cables respectively to compensate shortage of static capacitance so as to form a capacitance adjusting function in order to substantially even a distribution of the static capacity between the electrode plate and the array of all the cables in a direction perpendicular to a length of the electrode plate. A lead wire is provided to electrically connect the electrode plate to a microcomputer.

REFERENCES:
patent: 2245604 (1941-06-01), Peters et al.
patent: 3477024 (1969-11-01), Pelta
patent: 4041373 (1977-08-01), Maringer
patent: 4052665 (1977-10-01), Gruenwald
patent: 4349782 (1982-09-01), Doss
patent: 4547734 (1985-10-01), Spaude
patent: 5001432 (1991-03-01), Wixon

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