公开(公告)号：US20070067091A1

公开(公告)日：2007-03-22

申请号：US11521379

申请日：2006-09-15

申请人： Yuichi Takemura ,  Kenji Kasashima ,  Rihito Kaneko

发明人： Yuichi Takemura ,  Kenji Kasashima ,  Rihito Kaneko

IPC分类号： G06F19/00 ,  G01L23/22 ,  F02P5/00

CPC分类号： G01L23/225 ,  F02D35/027 ,  F02P5/152

摘要： In determining a knock of an engine, a vibration intensity is calculated by logarithm-transforming a peak value or an integral value of an output signal of a knock sensor. Further, a central value VMED of a vibration intensity distribution is calculated, and also a standard deviation σ in a region where the vibration intensity is smaller than this central value VMED is calculated. A vibration intensity reference value VIB is calculated as VMED−u×σ, thereby setting the vibration intensity reference value VIB to be close to a minimum of the vibration intensity distribution. Further, a knock reference value KCK is set by adding a predetermined value K to the vibration intensity reference value VIB. The vibration intensity detected by the knock sensor is compared with the knock reference value KCK to determine presence/absence of a knocking.

摘要翻译： 在确定发动机爆震时，通过对数变换爆震传感器的输出信号的峰值或积分值来计算振动强度。 此外，计算振动强度分布的中心值VMED，并且计算振动强度小于该中心值VMED的区域中的标准偏差σigma。 计算振动强度基准值VIB作为VMED-uxsigma，从而将振动强度基准值VIB设定为接近振动强度分布的最小值。 此外，通过将预定值K加到振动强度参考值VIB来设定爆震参考值KCK。 将爆震传感器检测到的振动强度与爆震参考值KCK进行比较，以确定爆震的存在/不存在。

公开(公告)号：US20070016387A1

公开(公告)日：2007-01-18

申请号：US11487601

申请日：2006-07-17

申请人： Yuichi Takemura ,  Rihito Kaneko ,  Kenji Kasashima

发明人： Yuichi Takemura ,  Rihito Kaneko ,  Kenji Kasashima

IPC分类号： G21C17/00 ,  G01L23/22

CPC分类号： G01L23/225 ,  F02D35/027 ,  F02D41/22 ,  F02D2041/286 ,  F02P5/152

摘要： A knock determining apparatus includes a sensor which outputs a waveform signal corresponding to a knock state, and at least one of a first to a third knock determiner which determines a knock state based on a vibration intensity distribution of the waveform signal. A knock detector compares the vibration intensity of the waveform signal with a threshold, and detects a knock when the vibration intensity exceeds the threshold. This threshold is corrected based on a knock determining result by the first to the third knock determiner.

摘要翻译： 爆震判定装置包括输出与爆震状态相对应的波形信号的传感器，以及基于波形信号的振动强度分布决定爆震状态的第一至第三爆震判定器中的至少一个。 敲击检测器将波形信号的振动强度与阈值进行比较，并且当振动强度超过阈值时检测爆震。 基于第一至第三敲击判定器的敲击判定结果来校正该阈值。

公开(公告)号：US20060129304A1

公开(公告)日：2006-06-15

申请号：US11302318

申请日：2005-12-14

申请人： Yuichi Takemura ,  Rihito Kaneko ,  Kenji Kasashima

发明人： Yuichi Takemura ,  Rihito Kaneko ,  Kenji Kasashima

IPC分类号： G01L23/22 ,  F02P5/152

CPC分类号： G01L23/225

摘要： For each predetermined crank angular interval, an output of a knock sensor is separated into a plurality of frequency components through a plurality of band-pass filters, and peak values of each frequency component are extracted. Then, a mean and a variance of the peak values are computed for each frequency component. A maximum one of the computed means is selected, and the corresponding frequency component, which is associated with the maximum mean, is selected. It is then determined whether the noise is present based on a ratio between the variance of the selected frequency component and the corresponding mean. If the noise is detected in any of the frequency components, execution of knock determination may be prohibited, or ignition timing feedback control according to a result of the knock determination may be prohibited, or ignition timing may be corrected by retarding the ignition timing.

摘要翻译： 对于每个预定的曲柄角间隔，通过多个带通滤波器将爆震传感器的输出分离成多个频率分量，并且提取每个频率分量的峰值。 然后，针对每个频率分量计算峰值的平均值和方差。 选择计算出的装置中最大的一个，并且选择与最大平均值相关联的对应的频率分量。 然后根据所选择的频率分量的方差与相应的平均值之间的比率确定噪声是否存在。 如果在任何频率分量中检测到噪声，则可以禁止执行爆震判定，或者可以禁止根据爆震判定结果的点火定时反馈控制，或者可以通过延迟点火正时来校正点火正时。

公开(公告)号：US07054735B2

公开(公告)日：2006-05-30

申请号：US11106568

申请日：2005-04-15

申请人： Satoshi Masuda ,  Masaomi Inoue ,  Yuichi Takemura ,  Kenji Kasashima ,  Rihito Kaneko

发明人： Satoshi Masuda ,  Masaomi Inoue ,  Yuichi Takemura ,  Kenji Kasashima ,  Rihito Kaneko

IPC分类号： G01L23/22 ,  F02D45/00

CPC分类号： F02D35/027 ,  G01L23/225

摘要： An ECU obtains two data values (a peak value and a waveform correlation coefficient) that show the characteristics of a knock from the output of a knock sensor. The ECO approximately obtains the mean of each data value by smoothing each data value, and approximately obtains a variance by smoothing the squared deviation between the data values before and after the smoothing process. The ECU then computes the square root of the variance to approximately obtain a standard deviation. The ECU normalizes each data value using the mean and the standard deviation, obtains a distribution of the normalized two data values, and calculates a correlation coefficient that shows the correlation between the obtained distribution and an ideal knock distribution. Based on the correlation coefficient, the ECU corrects a knock determination threshold value. Therefore, the mean and the standard deviation of the data values are computed with a small RAM capacity.

摘要翻译： ECU从爆震传感器的输出中获得表示敲击特性的两个数据值（峰值和波形相关系数）。 ECO通过平滑每个数据值大致获得每个数据值的平均值，并且通过平滑平滑处理之前和之后的数据值之间的平方偏差近似地获得方差。 ECU然后计算方差的平方根，大致获得标准偏差。 ECU使用平均值和标准偏差对每个数据值进行归一化，获得归一化的两个数据值的分布，并计算显示所获得的分布与理想的爆震分布之间的相关性的相关系数。 基于相关系数，ECU校正爆震判定阈值。 因此，以小的RAM容量计算数据值的平均值和标准偏差。

公开(公告)号：US20050234632A1

公开(公告)日：2005-10-20

申请号：US11106568

申请日：2005-04-15

申请人： Satoshi Masuda ,  Masaomi Inoue ,  Yuichi Takemura ,  Kenji Kasashima ,  Rihito Kaneko

发明人： Satoshi Masuda ,  Masaomi Inoue ,  Yuichi Takemura ,  Kenji Kasashima ,  Rihito Kaneko

IPC分类号： F02D45/00 ,  F02D41/24 ,  G01L23/22

CPC分类号： F02D35/027 ,  G01L23/225

摘要： An ECU obtains two data values (a peak value and a waveform correlation coefficient) that show the characteristics of a knock from the output of a knock sensor. The ECO approximately obtains the mean of each data value by smoothing each data value, and approximately obtains a variance by smoothing the squared deviation between the data values before and after the smoothing process. The ECU then computes the square root of the variance to approximately obtain a standard deviation. The ECU normalizes each data value using the mean and the standard deviation, obtains a distribution of the normalized two data values, and calculates a correlation coefficient that shows the correlation between the obtained distribution and an ideal knock distribution. Based on the correlation coefficient, the ECU corrects a knock determination threshold value. Therefore, the mean and the standard deviation of the data values are computed with a small RAM capacity.

摘要翻译： ECU从爆震传感器的输出中获得表示敲击特性的两个数据值（峰值和波形相关系数）。 ECO通过平滑每个数据值大致获得每个数据值的平均值，并且通过平滑平滑处理之前和之后的数据值之间的平方偏差近似地获得方差。 ECU然后计算方差的平方根，大致获得标准偏差。 ECU使用平均值和标准偏差对每个数据值进行归一化，获得归一化的两个数据值的分布，并计算显示所获得的分布与理想的爆震分布之间的相关性的相关系数。 基于相关系数，ECU校正爆震判定阈值。 因此，以小的RAM容量计算数据值的平均值和标准偏差。

公开(公告)号：US20110146384A1

公开(公告)日：2011-06-23

申请号：US12676161

申请日：2008-07-28

申请人： Rihito Kaneko ,  Kenji Kasashima ,  Masatomo Yoshihara ,  Kenji Senda ,  Norihito Hanai ,  Yasuhiro Yamasako ,  Yuichi Takemura

发明人： Rihito Kaneko ,  Kenji Kasashima ,  Masatomo Yoshihara ,  Kenji Senda ,  Norihito Hanai ,  Yasuhiro Yamasako ,  Yuichi Takemura

IPC分类号： G01L23/22

CPC分类号： G01L23/225

摘要： An engine ECU executes operations including: extracting vibration intensities of a plurality of frequency bands from vibration detected by a knock sensor, multiplying the extracted vibration intensity of each frequency band by a weight coefficient and adding the results in correspondence with crank angles to calculate integrated values of every five degrees; calculating a coefficient of correlation based on a result of comparison between a vibration waveform of a frequency band and a knock waveform model prepared in advance; calculating a knock intensity; determining occurrence of knocking in accordance with the calculated coefficient of correlation and the knock intensity; and determining no occurrence of knocking in accordance with the calculated coefficient of correlation and the knock intensity.

摘要翻译： 发动机ECU执行以下操作：包括：从由爆震传感器检测的振动中提取多个频带的振动强度，将每个频带的提取的振动强度乘以权重系数，并将结果与​​曲柄角相对应，以计算积分值 每五度; 基于频带的振动波形与预先准备的爆震波形模型的比较结果，计算相关系数; 计算爆震强度; 根据计算的相关系数和爆震强度确定爆震的发生; 并根据计算的相关系数和爆震强度确定不发生爆震。

公开(公告)号：US07621172B2

公开(公告)日：2009-11-24

申请号：US11471682

申请日：2006-06-21

申请人： Masatomo Yoshihara ,  Kenji Kasashima ,  Rihito Kaneko ,  Koji Aso ,  Kenji Senda ,  Shigeru Kamio ,  Yuichi Takemura

发明人： Masatomo Yoshihara ,  Kenji Kasashima ,  Rihito Kaneko ,  Koji Aso ,  Kenji Senda ,  Shigeru Kamio ,  Yuichi Takemura

IPC分类号： G01L23/22

CPC分类号： G01L23/225

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.

摘要翻译： 发动机ECU200包括带通滤波器（1），带通滤波器（2）和带通滤波器（3）。 带通滤波器（1）仅从由爆震传感器检测到的振动中仅提取第一频带A的振动。 带通滤波器（2）仅从由爆震传感器检测到的振动中仅提取第二频带B处的振动。 带通滤波器（3）仅从由爆震传感器检测到的振动中仅提取第三频带C处的振动。 第一至第三频带A-C的带宽相同。 发动机ECU以这些频带的合成波形计算振动幅度的峰值，根据峰值判定是否发生爆震。

公开(公告)号：US07478624B2

公开(公告)日：2009-01-20

申请号：US11471540

申请日：2006-06-21

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： F02P5/00 ,  G01L23/22

CPC分类号： F02P5/152 ,  F02D35/027 ,  G01L23/225 ,  Y02T10/46

摘要： An engine ECU executes a program including a step of calculating intensity values LOG(V), a step of detecting vibration waveforms, a step of calculating a correlation coefficient K based on vibration waveforms, a step of preparing frequency distribution of intensity values LOG(V) smaller than a threshold V(1) and intensity values LOG(V) in an ignition cycle where correlation coefficient K is larger than a threshold K(1), a step of calculating a knock determination level V(KD) based on a median V(50) and a standard deviation σ of intensity values LOG(V), and a step of counting the number of intensity values LOG(V) larger than knock determination level V(KD) as the number of times that knocking has occurred.

摘要翻译： 发动机ECU执行包括计算强度值LOG（V），检测振动波形的步骤，基于振动波形计算相关系数K的步骤的程序，准备强度值LOG（V）的频率分布的步骤 ），其中相关系数K大于阈值K（1）的点火循环中的阈值V（1）和强度值LOG（V）;基于中值的计算爆震判定水平V（KD）的步骤 V（50）和强度值LOG（V）的标准偏差σ，以及作为敲击发生次数的大于爆震判定水平V（KD）的强度值LOG（V）的数量的计数步骤。

公开(公告)号：US07387107B2

公开(公告)日：2008-06-17

申请号：US11475230

申请日：2006-06-27

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： F02P5/152 ,  F02P5/00

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。

公开(公告)号：US07356404B2

公开(公告)日：2008-04-08

申请号：US11521379

申请日：2006-09-15

申请人： Yuichi Takemura ,  Kenji Kasashima ,  Rihito Kaneko

发明人： Yuichi Takemura ,  Kenji Kasashima ,  Rihito Kaneko

IPC分类号： F06F19/00 ,  G01L23/22 ,  F02P5/00

CPC分类号： G01L23/225 ,  F02D35/027 ,  F02P5/152

摘要： In determining a knock of an engine, a vibration intensity is calculated by logarithm-transforming a peak value or an integral value of an output signal of a knock sensor. Further, a central value VMED of a vibration intensity distribution is calculated, and also a standard deviation σ in a region where the vibration intensity is smaller than this central value VMED is calculated. A vibration intensity reference value VIB is calculated as VMED−u×σ, thereby setting the vibration intensity reference value VIB to be close to a minimum of the vibration intensity distribution. Further, a knock reference value KCK is set by adding a predetermined value K to the vibration intensity reference value VIB. The vibration intensity detected by the knock sensor is compared with the knock reference value KCK to determine presence/absence of a knocking.

摘要翻译： 在确定发动机爆震时，通过对数变换爆震传感器的输出信号的峰值或积分值来计算振动强度。 此外，计算振动强度分布的中心值VMED，并且计算振动强度小于该中心值VMED的区域中的标准偏差σigma。 计算振动强度基准值VIB作为VMED-uxsigma，从而将振动强度基准值VIB设定为接近振动强度分布的最小值。 此外，通过将预定值K加到振动强度参考值VIB来设定爆震参考值KCK。 将爆震传感器检测到的振动强度与爆震参考值KCK进行比较，以确定爆震的存在/不存在。