Piezoelectric knock sensor

Details Piezoelectric knock sensor Piezoelectric knock sensor

1981-11-19

1983-07-19

Gill, James J.

Measuring and testing

Engine detonation

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

73654, 310329, G01L 2322

Patent

active

043936881

ABSTRACT:
A piezoelectric knock sensor has a case comprising a mounting stud, flexing plate and cover. The flexing plate has a surface provided with a plurality of raised radial ridges. A piezoelectric disk is affixed to the surface with an adhesive and abuts the ridges for improved strain transmission and reliable electrical ground contact. A spring contact further biases the disk against the ridges during assembly bonding of the adhesive; and excess adhesive can flow radially outward between the ridges.

REFERENCES:
patent: 3042744 (1962-07-01), Shoor
patent: 3891869 (1975-06-01), Scarpa
patent: 4254354 (1981-03-01), Keem

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