Piezoelectric knock sensor

Details Piezoelectric knock sensor Piezoelectric knock sensor

G - Physics

08

B

349/29, 73/67, 3

G08B 21/00 (2006.01) B06B 1/06 (2006.01) G01L 23/22 (2006.01)

Patent

CA 1170076

C-3334 D-5,026 PIEZOELECTRIC KNOCK SENSOR Abstract of the Disclosure 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 piezo- electric generating means and an axis offset from the axis of the mounting stud.

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