Piezoelectric knock sensor

Details Piezoelectric knock sensor Piezoelectric knock sensor

1981-07-31

1983-02-01

Shoop, William M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, 310338, 310339, H01L 4110

Patent

active

043718043

ABSTRACT:
A broadly tuned self resonant knock sensor includes a piezoelectric element mounted on a central mounting stud. The element includes a generally annular vibratable portion having a variable radial dimension so as to exhibit resonant vibrations at a plurality of relatively closely spaced resonant frequencies essentially spanning an engine determined knock frequency band. In its preferred embodiment the element comprises a circular plate having piezoelectric generating means and an axis offset from the axis of the mounting stud.

REFERENCES:
patent: 3783309 (1974-01-01), Alibert et al.
patent: 3843898 (1974-10-01), Maciag
patent: 4225802 (1980-09-01), Suzuki et al.
patent: 4254354 (1981-03-01), Keem
patent: 4305013 (1981-12-01), Baier et al.

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