Knock detecting apparatus for combustion engines

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

1979-11-19

1982-07-27

Cox, Ronald B.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123435, 73 35, 73651, 73652, 73654, F02P 504, F02B 3300

Patent

active

043411894

ABSTRACT:
A knock detecting apparatus for an internal combustion engine includes a vibrating sheet branched into a plurality of vibrating reeds by forming a recess from one end of the vibrating sheet. The vibrating reeds have different lengths, shapes or thicknesses, and the other end of the vibrating sheet is fixed to a supporting member which is secured to the engine thereby to allow the vibrating reeds vibrate with different resonance characteristics in response to the vibration of the engine caused by the knocking. The vibration of the vibrating sheet is detected, for examle, as a change in reluctance by forming a magnetic path through the vibrating sheet and air gaps respectively located between the free ends of the vibrating reeds and a core.

REFERENCES:
patent: 759513 (1904-05-01), Frahm
patent: 2219803 (1940-10-01), Bourne
patent: 2417974 (1947-03-01), Downs et al.
patent: 4233836 (1980-11-01), Yoneda et al.

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