Knocking detecting apparatus for internal combustion engines

Details Knocking detecting apparatus for internal combustion engines Knocking detecting apparatus for internal combustion engines

1983-04-07

1985-02-12

Myracle, Jerry W.

Measuring and testing

Engine detonation

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

G01M 1500

Patent

active

044983310

ABSTRACT:
In a knocking discriminating system for an internal combustion engine, a knocking detecting signal obtained from a knocking sensor is passed through a band-pass filter for obtaining a sinusoidal waveform of approximately 8 KHz. The sinusoidal waveform signal is then applied to an A/D converter, the operational timing of which is controlled by a microcomputer, so that only a part of the knocking detecting signal nearby the peak portion is converted into digital values. A discrimination level is prepared from the average value of the digital values, and the knocking status is discriminated by comparing the maximum value of the digital values thus converted with the discriminating level.

REFERENCES:
patent: 4300503 (1981-11-01), Deleris et al.
patent: 4355534 (1982-10-01), Roger

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