Spark plug with built-in pressure sensor

Details Spark plug with built-in pressure sensor Spark plug with built-in pressure sensor

1994-01-26

1999-09-21

Patel, Vip

Electric lamp and discharge devices

Spark plugs

Sealing-off valve for electrode chamber

313142, 313143, H01J 1320

Patent

active

059558261

ABSTRACT:
A threaded portion is formed on a metal shell of a spark plug. Within a mounting base of the metal shell, a pressure sensor is arranged in such a direction that it generates an electrical signal in response to a variation in a tightening load of the spark plug. A slit is formed as a pressure-introducing channel along an axis of the spark plug in the threaded portion of the metal shell so that the slit is communicated with an interior of the mounting base.

REFERENCES:
patent: 3079453 (1963-02-01), Clark
patent: 4267482 (1981-05-01), Iwata et al.
patent: 4686861 (1987-08-01), Morii
patent: 4909071 (1990-03-01), Amano et al.
patent: 4969353 (1990-11-01), Steinke
patent: 4984905 (1991-01-01), Amano et al.
patent: 4996873 (1991-03-01), Takeuchi

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