Piezoelectric pick-up device for internal combustion engine

Details Piezoelectric pick-up device for internal combustion engine Piezoelectric pick-up device for internal combustion engine

1984-12-18

1987-04-28

Levy, Stewart J.

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

310346, G01L 2322

Patent

active

046604090

ABSTRACT:
A piezoelectric pick-up device for an internal combustion engine is disclosed, which comprises a metal case mounted on an internal combustion engine cylinder wall or the like, a mounting metal rod projecting from the inner bottom surface of the metal case into the interior thereof, a piezoelectric element and a weight disposed in the case interior and fitted on the mounting rod, the piezoelectric element being electrically coupled to the metal case, a cap-like cover fittedly covering the weight or the entirety of the piezoelectric element and the weight, and a molding material filling the case interior. The cap-like cover is made of an elastic material or a hard material.

REFERENCES:
patent: 3351787 (1967-11-01), Kistler
patent: 3482121 (1969-12-01), Hatschek
patent: 4359658 (1982-11-01), Cartier
patent: 4485325 (1984-11-01), Yamamoto et al.
patent: 4502332 (1985-03-01), Sheridan et al.

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