发明名称 |
Device for detecting knocking of an internal combustion engine |
摘要 |
A device for detecting knocking in an internal combustion engine which, when spike noise or noise due to disturbance in the flame in low-load running are generated, does not erroneously detect it as knocking. Knocking frequency components passing through a band-pass filter 32 and frequency components lower than the knocking frequency and passing through a low-load noise band-pass filter 321 are picked from the ionic current detected by an ionic current detecting unit 17. When the level of the low-frequency components is larger than a predetermined value, it is regarded that the noise is generated due to unstable combustion during the low-load operation or the spike noise is generated due to corona discharge of a spark plug 16, and the determination of the occurrence of knocking is prevented. This constitution makes it possible to prevent erroneous detection of knocking.
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申请公布号 |
US5900536(A) |
申请公布日期 |
1999.05.04 |
申请号 |
US19970922400 |
申请日期 |
1997.09.03 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
MOGI, KAZUHISA;NAKATA, KOICHI;KUREBAYASHI, YOICHI |
分类号 |
F02P17/12;G01L23/22;(IPC1-7):G01L23/22 |
主分类号 |
F02P17/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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