Detonation detection system for internal combustion engines

Details Detonation detection system for internal combustion engines Detonation detection system for internal combustion engines

1992-03-19

1994-12-20

Williams, Hezron E.

Measuring and testing

Engine detonation

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

G01L 2322

Patent

active

053737261

ABSTRACT:
A detonation detector operable for detecting the intensity of detonation occurring in a combustion chamber of an internal combustion engine. The detonation detector of the present invention includes a mechanical filter mounted on the engine for amplifying vibration signals resulting from detonation, including low intensity, sub-audible detonation signals. The mechanical filter is tuned to a resonant frequency at about the detonation frequency signal in order to attenuate noise signals from the engine and amplify signals at about the detonation frequency signal. A flat response accelerometer is mounted on the mechanical filter and receives the amplified detonation frequency signals and the attenuated noise signals and converts these signals into electrical output signals. An electronic circuit is connected to the accelerometer for amplifying the electrical output signals and filtering the attenuated noise signals. Thus, the detonation detector provides an output indicative of the intensity level of detonation substantially devoid of noise signals.

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patent: 4233836 (1980-11-01), Yoneda
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