Spark plug with pressure sensor

Details Spark plug with pressure sensor Spark plug with pressure sensor

1988-08-19

1989-11-21

Woodiel, Donald O.

Measuring and testing

Vehicle drive train

Rear end

73714, 73754, 73DIG4, G01L 908

Patent

active

048814032

ABSTRACT:
A spark plug with pressure sensor comprising; a center electrode having a high voltage terminal; an insulator provided around said center electrode to securely support it; a tubular metallic shell provided to support said insulator at its inner side; a pressure sensor having a piezoelectrical element at least enclosed by a casing of a metallic hollow ring; the metallic shell having a diameter-increased portion and a diameter-reduced portion; the casing of the sensor being inserted into the diameter-reduced portion with an inner side of the casing tightly engaging the outer side of the diameter-reduced portion; a mount means having a ring portion and a flange portion; the ring portion tightly inserted into the diameter-reduced portion while the flange portion tightly sandwiching the casing with a step between the diameter-reduced portion and the diameter-increased portion; and the ring portion being welded to said diameter-reduced portion to maintain air-tight relationship between an innerside of the ring portion and outer side of the diameter-reduced portion.

REFERENCES:
patent: 1861021 (1932-05-01), Martin
patent: 2652517 (1953-09-01), Van Degrift et al.
patent: 4169388 (1979-10-01), Teitelbaum

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