Spark plug voltage probe device in an internal combustion engine

Details Spark plug voltage probe device in an internal combustion engine Spark plug voltage probe device in an internal combustion engine

1994-04-28

1996-09-10

Strecker, Gerard R.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

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

324393, F02P 1712, G01R 106, G01R 19165

Patent

active

055549306

ABSTRACT:
In a spark plug voltage probe device which detects a voltage applied to a spark plug installed in an internal combustion engine so as to analyze a burning condition in the internal combustion engine on the basis of the voltage applied to the spark plug, a rubber clamper (9) is secured to the internal combustion engine, and having a groove (92) in which a spark cable (60) is located so as to form a static capacity between the rubber clamper (9) and the spark plug cable (60). An electrical conductor (93) is embedded in the rubber clamper (9) along the groove (92) while the electrical conductor (93) is connected to a microcomputer by way of an output cable (64) so as to analyze a spark plug voltage waveform. A condenser (42) is connected to a common point (A) between the electrical conductor (93) and the microcomputer so as to reduce the spark plug voltage according to a capacity of the condenser (42).

REFERENCES:
patent: 4041373 (1977-08-01), Maringer
patent: 4547734 (1985-10-01), Spaude
patent: 5307017 (1994-04-01), Maruyama et al.
patent: 5317268 (1994-05-01), Maruyama et al.

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