KNOCKING DETERMINATION DEVICE AND KNOCKING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2015/104909

A1

Provided are a knocking determination device and a knocking control device for an internal combustion engine, with which a large amount of knocking can be detected quickly and with which knocking is easily determined. A knocking time window and a bandpass filter (BPF) are used (B1-B2) to extract a knocking frequency waveform signal from a knock sensor signal (Sg1), and integration is performed to obtain a first calculated value (B3). A reference time window and a BPF are used (B4-B5) to extract a reference frequency waveform signal from the knock sensor signal (Sg1), and integration is performed to obtain a second calculated value (B6). The average value of multiple instances of the second calculated value is obtained (B7), and the first calculated value is divided by the average value to obtain a signal-to-noise (S/N) ratio (B8). A multiplied value is obtained (B9) by multiplying the S/N ratio by a weighting coefficient, a moving average value for several of the multiplied values is obtained (10), and the moving average is used as a knocking indicator to determine knocking and to perform a control (B11-13).

JP2007056773	CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE
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JP2013209894	DEVICE FOR CONTROLLING ENGINE USING MIXED FUEL

TAKAYANAGI KO (JP)
SHIRAISHI MASATAKA (JP)
SASE RYO (JP)

PCT/JP2014/081002

July 16, 2015

November 25, 2014

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MITSUBISHI HEAVY IND LTD (JP)

F02D45/00; F02P5/152

JPH0914043A	1997-01-14
JP2001234804A	2001-08-31
JP2012103157A	2012-05-31
JP2013204496A	2013-10-07
JP2007231903A	2007-09-13
JP4919097B2	2012-04-18

See also references of EP 3078841A4

MITSUISHI, Toshiro et al. (JP)
Toshiro Mitsuishi (JP)

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