Knocking detector

Details Knocking detector Knocking detector

1980-12-02

1983-01-18

Gill, James J.

Measuring and testing

Engine detonation

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

G01L 2322

Patent

active

043686354

ABSTRACT:
A knocking detector senses engine vibration and produces an electrical signal corresponding to such vibration. This signal is then rectified and smoothed to produce a background noise signal. When the magnitude of the background noise level signal is greater than a reference value, the amplitude of the rectified signal is limited so that the background noise level signal has a substantially constant level. This limited background noise level signal is then compared with the initial signal from the sensor, and if the initial signal from the sensor is greater in magnitude than the background noise signal, the engine is considered to be in knocking condition.

REFERENCES:
patent: 4002155 (1977-01-01), Harned et al.
patent: 4111035 (1978-09-01), West et al.
patent: 4153020 (1979-05-01), King et al.
patent: 4279143 (1981-07-01), Guipaud

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