Knock detecting apparatus for internal combustion engines

Details Knock detecting apparatus for internal combustion engines Knock detecting apparatus for internal combustion engines

1980-07-10

1982-11-09

Gill, James J.

Measuring and testing

Engine detonation

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

73651, G01L 2322

Patent

active

043578250

ABSTRACT:
A knock detecting apparatus for internal combustion engines includes a housing of a predetermined shape containing therein magnetic circuit means a part of which is formed by vibrating plate means made of a magnetic material and magnetic flux sensing means for sensing a change in the magnetic reluctance of the magnetic circuit means caused by the vibration of the vibrating plate means in resonance with a knocking frequency.

REFERENCES:
patent: 2275675 (1942-03-01), Draper et al.
patent: 2300638 (1942-11-01), Wente
patent: 2319219 (1943-05-01), Draper et al.
patent: 2424864 (1947-07-01), Treseder
patent: 4254354 (1981-03-01), Keem
patent: 4275586 (1981-06-01), Gast et al.

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