Spark plugs for internal-combustion engines

Details Spark plugs for internal-combustion engines Spark plugs for internal-combustion engines

1989-10-19

1992-10-27

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313142, H01T 1322

Patent

active

051592320

ABSTRACT:
A spark plug for an automotive internal combustion engine providing improved ignition even when carbon is deposited on the insulator of the plug. A rich fuel-air ratio causes carbon to be deposited on spark plug insulators, thereby decreasing its effective insulation. By limiting the geometrical dimension of the plug's center electrode the problem of carbon build-up is overcome. The sizes of these elements have certain allowable ranges that enhance the igniting effect of the plug.

REFERENCES:
patent: 3313972 (1967-04-01), Beesch
patent: 4700103 (1987-10-01), Yamaguchi et al.
patent: 4845400 (1989-07-01), Takamura et al.

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