发明授权
- 专利标题: Knocking state determination device
- 专利标题(中): 敲击状态判定装置
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申请号: US12131158申请日: 2008-06-02
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公开(公告)号: US07669582B2公开(公告)日: 2010-03-02
- 发明人: Rihito Kaneko , Kenji Kasashima , Masatomo Yoshihara , Koji Aso , Kenji Senda , Shigeru Kamio , Yuichi Takemura
- 申请人: Rihito Kaneko , Kenji Kasashima , Masatomo Yoshihara , Koji Aso , Kenji Senda , Shigeru Kamio , Yuichi Takemura
- 申请人地址: JP Toyota-shi JP Kariya-shi
- 专利权人: Toyota Jidosha Kabushiki Kaisha,Denso Corporation
- 当前专利权人: Toyota Jidosha Kabushiki Kaisha,Denso Corporation
- 当前专利权人地址: JP Toyota-shi JP Kariya-shi
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JP2005-188346 20050628
- 主分类号: F02P5/04
- IPC分类号: F02P5/04 ; F02P5/00
摘要:
An engine ECU executes a program including the steps of: calculating a correlation coefficient K based on the result of comparing a vibration waveform of an engine and a knock waveform model stored previously; calculating a magnitude value LOG(V) from the magnitude V detected based on a signal transmitted from a knock sensor; creating frequency distribution of magnitude values LOG(V) by using magnitude values LOG(V) in an ignition cycle in which the correlation coefficient K larger than a threshold K(1) is calculated; and counting knock proportion KC by using the created frequency distribution. If the vibration waveform includes a waveform of vibration of noise components, the correlation coefficient K is calculated to be smaller comparing with a case of not including it.
公开/授权文献
- US20080234918A1 KNOCKING STATE DETERMINATION DEVICE 公开/授权日:2008-09-25