公开(公告)号：US20080234918A1

公开(公告)日：2008-09-25

申请号：US12131158

申请日：2008-06-02

申请人： Rihito KANEKO ,  Kenji KASASHIMA ,  Masatomo YOSHIHARA ,  Koji ASO ,  Kenji SENDA ,  Shigeru KAMIO ,  Yuichi TAKEMURA

发明人： Rihito KANEKO ,  Kenji KASASHIMA ,  Masatomo YOSHIHARA ,  Koji ASO ,  Kenji SENDA ,  Shigeru KAMIO ,  Yuichi TAKEMURA

IPC分类号： F02D45/00

CPC分类号： F02D35/027 ,  G01L23/225

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.

摘要翻译： 发动机ECU执行程序，包括以下步骤：基于比较发动机的振动波形和先前存储的爆震波形模型的结果来计算相关系数K; 从根据从爆震传感器发送的信号检测到的幅值V计算幅度值LOG（V）; 通过使用大于阈值K（1）的相关系数K的点火循环中的幅度值LOG（V）来产生幅度值LOG（V）的频率分布; 并使用创建的频率分布计数爆震比例KC。 如果振动波形包括噪声成分的振动波形，则与不包含噪声成分的情况相比，相关系数K被计算得较小。