发明名称 |
Knocking determination device for internal combustion engine |
摘要 |
An engine ECU 200 includes a bandpass filter (1), a bandpass filter (2), and a bandpass filter (3). The bandpass filter (1) extracts only vibrations at a first frequency band A from the vibrations detected by a knock sensor. The bandpass filter (2) extracts only vibrations at a second frequency band B from the vibrations detected by the knock sensor. The bandpass filter (3) extracts only vibrations at a third frequency band C from the vibrations detected by the knock sensor. The first to third frequency bands A-C are identical in bandwidth. The engine ECU calculates a peak value in magnitude of vibrations in a synthesized waveform of these frequency bands, and determines whether knocking occurred or not based on the peak value.
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申请公布号 |
US7621172(B2) |
申请公布日期 |
2009.11.24 |
申请号 |
US20060471682 |
申请日期 |
2006.06.21 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA;DENSO CORPORATION |
发明人 |
YOSHIHARA MASATOMO;KASASHIMA KENJI;KANEKO RIHITO;ASO KOJI;SENDA KENJI;KAMIO SHIGERU;TAKEMURA YUICHI |
分类号 |
G01L23/22 |
主分类号 |
G01L23/22 |
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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