Vibration sensor, particularly knock sensor for internal combust

Details Vibration sensor, particularly knock sensor for internal combust Vibration sensor, particularly knock sensor for internal combust

1982-06-21

1984-05-08

Gill, James J.

Measuring and testing

Engine detonation

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

73654, 310329, G01L 2322

Patent

active

044467222

ABSTRACT:
To facilitate manufacture and assembly of a vibration sensor, particularly to sense knocking vibrations or incipient knocking in an internal conbustion (IC) engine, piezoelectric elements are secured to the machine or cylinder or a cylinder head bolt, the vibration of which is to be sensed, and a flexing strip is resiliently engaged with a surface of the piezoelectric element or elements, and arranged transverse to the direction of vibration of the machine or IC engine. In a preferred form, the piezoelectric element can be a tubular structure (FIG. 4: 19) located in a cross bore (16) of a cylinder head bolt, the free swinging flexing element (21) being positioned within the hollow portion of the tubular piezoelectric element and pressed against an outer end face by a spring engaging laterally projecting wings (22) secured to the flexing strip.

REFERENCES:
patent: 4379404 (1983-04-01), Hamisch et al.

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