Knock detector using optical fiber thermometer
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United States of America Patent
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Oct 1, 1991
Grant Date -
N/A
app pub date -
Jan 3, 1989
filing date -
Jan 3, 1989
priority date (Note) -
Expired
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Abstract
A knock detector for an internal combustion engine includes an optical fiber thermometer that senses variations in heat flow within an engine cylinder. The optical fiber thermometer includes a black body emitter disposed inside the cylinder which is heated by combustion gases to provide an optical output. The optical output is converted to an electrical signal whose fourier components are analyzed to determine whether a knock condition exists.
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