Device for detecting knocking in an internal combustion engine

Details Device for detecting knocking in an internal combustion engine Device for detecting knocking in an internal combustion engine

1997-09-02

2000-11-28

Williams, Hezron

Measuring and testing

Engine detonation

Specific type of detonation sensor

73 3506, 324378, G01L 2322

Patent

active

061519545

ABSTRACT:
A device for detecting knocking of an internal combustion engine which, even when spike noise is generated, does not erroneously detect it as knocking. An ionic current signal detected by an ionic current detecting unit 17 is separated into a knocking frequency component passing through a band-pass filter 32 and frequency components other than the knocking frequency component passing through a low-pass filter 321 and a high-pass filter 322. When the knocking frequency component is higher than a predetermined level, it is determined that the knocking is occurring. When the frequency component other than the knocking frequency component is higher than the predetermined level, it is regarded that the spike noise is generating, so that the generation of spike noise will not be erroneously determined as knocking.

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Patent Abstracts of Japan, vol. 018, No. 491 (M-1672), Sep. 13,1994 & JP 06 159129 A (Daihatsu Motor Co. Ltd.; others: 01), Jun. 7, 1994.

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