Knock detecting apparatus for combustion engines
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 14, 1984
Issued Date -
N/A
app pub date -
Mar 22, 1982
filing date -
Jun 4, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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 to 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 example, 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.
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