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公开(公告)号：US07043353B2
公开(公告)日：2006-05-09
申请号：US11106581
申请日：2005-04-15
IPC分类号： G01L23/22
CPC分类号： G01L23/225
摘要： A plurality of variables representing the characteristics of a knock is obtained from an output signal of a sensor. The variables include a peak value of the knock frequency component in the output signal of the sensor and a waveform correlation coefficient representing the correlation between the waveform of the output signal and an ideal knock waveform, which is the waveform specific to a knock. The peak value and the waveform correlation coefficient are normalized, and a detection distribution is created using the obtained normalized data values. A correlation coefficient for knock determination representing the correlation between the detection distribution and an ideal knock distribution is calculated. The correlation coefficient for knock determination is compared with a predetermined knock determination threshold value, and the knock determination threshold value is corrected in accordance with the comparison result. As a result, the accuracy and the reliability of knock determination are improved.
摘要翻译： 从传感器的输出信号获得表示爆震特性的多个变量。 这些变量包括传感器的输出信号中的爆震频率分量的峰值和表示输出信号的波形与理想爆震波形之间的相关性的波形相关系数，其是敲击特有的波形。 将峰值和波形相关系数归一化，并使用所获得的归一化数据值创建检测分布。 计算表示检测分布与理想爆震分布之间的相关性的爆震确定的相关系数。 将爆震确定的相关系数与预定的爆震判定阈值进行比较，并根据比较结果校正爆震判定阈值。 结果，提高了敲击确定的精度和可靠性。
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公开(公告)号：US20050241369A1
公开(公告)日：2005-11-03
申请号：US11106546
申请日：2005-04-15
CPC分类号： G01L23/225
摘要： The signal levels of vibration waveform signals outputted by knock sensors are extracted at a filter processing section for each of a plurality of frequency bands. The mean value of the signal levels in the frequency bands at a point in time when variation of the signal levels in the frequency bands is minimum computed, and the mean value is detected as a background level. A knock characteristic parameter, which represents the characteristics of knock, is computed based on the extracted signal levels in the frequency bands. The knock characteristic parameter is compared with the background level to obtain a knock intensity. If the knock intensity is equal to or greater than a knock determination value, it is determined that knock that exceeds a permissible level is occurring. If the knock intensity is less than the knock determination value, it is determined that knock that exceeds the permissible level is not occurring. This configuration permits the background level of the output of the knock sensors to be accurately detected without being influenced by knock or noise.
摘要翻译： 对于多个频带中的每一个，在滤波处理部分提取由爆震传感器输出的振动波形信号的信号电平。 在频带中的信号电平的变化被计算的时间点的频带中的信号电平的平均值被计算，并且平均值被检测为背景电平。 基于在频带中提取的信号电平来计算表示爆震特性的爆震特征参数。 将敲击特征参数与背景水平进行比较以获得爆震强度。 如果敲击强度等于或大于爆震判定值，则确定发生超过允许水平的爆震。 如果爆震强度小于爆震判定值，则确定没有发生超过允许水平的爆震。 该配置允许在不受敲击或噪声影响的情况下精确地检测爆震传感器的输出的背景水平。
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公开(公告)号：US07347081B2
公开(公告)日：2008-03-25
申请号：US11106546
申请日：2005-04-15
IPC分类号： G01L23/22
CPC分类号： G01L23/225
摘要： The signal levels of vibration waveform signals outputted by knock sensors are extracted at a filter processing section for each of a plurality of frequency bands. The mean value of the signal levels in the frequency bands at a point in time when variation of the signal levels in the frequency bands is minimum computed, and the mean value is detected as a background level. A knock characteristic parameter, which represents the characteristics of knock, is computed based on the extracted signal levels in the frequency bands. The knock characteristic parameter is compared with the background level to obtain a knock intensity. If the knock intensity is equal to or greater than a knock determination value, it is determined that knock that exceeds a permissible level is occurring. If the knock intensity is less than the knock determination value, it is determined that knock that exceeds the permissible level is not occurring. This configuration permits the background level of the output of the knock sensors to be accurately detected without being influenced by knock or noise.
摘要翻译： 对于多个频带中的每一个，在滤波处理部分提取由爆震传感器输出的振动波形信号的信号电平。 在频带中的信号电平的变化被计算的时间点的频带中的信号电平的平均值被计算，并且平均值被检测为背景电平。 基于在频带中提取的信号电平来计算表示爆震特性的爆震特征参数。 将敲击特征参数与背景水平进行比较以获得爆震强度。 如果敲击强度等于或大于爆震判定值，则确定发生超过允许水平的爆震。 如果爆震强度小于爆震判定值，则确定没有发生超过允许水平的爆震。 该配置允许在不受敲击或噪声影响的情况下精确地检测爆震传感器的输出的背景水平。
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公开(公告)号：US07054735B2
公开(公告)日：2006-05-30
申请号：US11106568
申请日：2005-04-15
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。
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公开(公告)号：US20050234632A1
公开(公告)日：2005-10-20
申请号：US11106568
申请日：2005-04-15
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。
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公开(公告)号：US20050234633A1
公开(公告)日：2005-10-20
申请号：US11106581
申请日：2005-04-15
CPC分类号： G01L23/225
摘要： A plurality of variables representing the characteristics of a knock is obtained from an output signal of a sensor. The variables include a peak value of the knock frequency component in the output signal of the sensor and a waveform correlation coefficient representing the correlation between the waveform of the output signal and an ideal knock waveform, which is the waveform specific to a knock. The peak value and the waveform correlation coefficient are normalized, and a detection distribution is created using the obtained normalized data values. A correlation coefficient for knock determination representing the correlation between the detection distribution and an ideal knock distribution is calculated. The correlation coefficient for knock determination is compared with a predetermined knock determination threshold value, and the knock determination threshold value is corrected in accordance with the comparison result. As a result, the accuracy and the reliability of knock determination are improved.
摘要翻译： 从传感器的输出信号获得表示爆震特性的多个变量。 这些变量包括传感器的输出信号中的爆震频率分量的峰值和表示输出信号的波形与理想爆震波形之间的相关性的波形相关系数，其是敲击特有的波形。 将峰值和波形相关系数归一化，并使用所获得的归一化数据值创建检测分布。 计算表示检测分布与理想爆震分布之间的相关性的爆震确定的相关系数。 将爆震确定的相关系数与预定的爆震判定阈值进行比较，并根据比较结果校正爆震判定阈值。 结果，提高了敲击确定的精度和可靠性。
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7.发明申请公开(公告)号：US20080262705A1
公开(公告)日：2008-10-23
申请号：US12092163
申请日：2007-10-01
申请人： Shuhei Oe , Kouzi Ohara , Satoshi Masuda , Yuuichi Takemura , Rihito Kaneko , Kenji Kasashima , Masatomo Yoshihara , Kenji Senda , Norihito Hanai , Yasuhiro Yamasako
发明人： Shuhei Oe , Kouzi Ohara , Satoshi Masuda , Yuuichi Takemura , Rihito Kaneko , Kenji Kasashima , Masatomo Yoshihara , Kenji Senda , Norihito Hanai , Yasuhiro Yamasako
IPC分类号： F02D45/00
CPC分类号： G01M15/11 , F02D35/027 , F02D41/1498 , G01L23/225
摘要： An engine ECU executes: calculating 15-degrees integrated value integrating vibration intensity for each of six crank angle ranges; detecting an amount of change in the 15-degrees integrated value between ignition cycles; specifying two ranges having larger amounts of change; specifying a crank angle having intensity larger than that of a neighboring crank angle in a search range determined to be the same as the specified ranges; calculating a coefficient of correlation K corresponding to a difference between a vibration waveform and a knock waveform model while the specified crank angle is matched with a timing at which intensity peaks in the knock waveform model; and, if the coefficient of correlation K is larger than a threshold value K(0), determining that knock has occurred.
摘要翻译： 发动机ECU执行：对六个曲柄角范围中的每一个计算积分振动强度的15度积分值; 检测点火循环之间15度积分值的变化量; 指定具有较大变化量的两个范围; 指定在确定为与所述指定范围相同的搜索范围内具有大于相邻曲柄角的强度的曲柄角; 计算与所述爆震波形模型中的强度峰值的时刻相匹配的振动波形与爆震波形模型之间的差值的相关系数K; 并且如果相关系数K大于阈值K（0），则确定发生了敲击。
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8.发明授权公开(公告)号：US07673615B2
公开(公告)日：2010-03-09
申请号：US12092163
申请日：2007-10-01
申请人： Shuhei Oe , Kouzi Ohara , Satoshi Masuda , Yuuichi Takemura , Rihito Kaneko , Kenji Kasashima , Masatomo Yoshihara , Kenji Senda , Norihito Hanai , Yasuhiro Yamasako
发明人： Shuhei Oe , Kouzi Ohara , Satoshi Masuda , Yuuichi Takemura , Rihito Kaneko , Kenji Kasashima , Masatomo Yoshihara , Kenji Senda , Norihito Hanai , Yasuhiro Yamasako
CPC分类号： G01M15/11 , F02D35/027 , F02D41/1498 , G01L23/225
摘要： An engine ECU executes: calculating 15-degrees integrated value integrating vibration intensity for each of six crank angle ranges; detecting an amount of change in the 15-degrees integrated value between ignition cycles; specifying two ranges having larger amounts of change; specifying a crank angle having intensity larger than that of a neighboring crank angle in a search range determined to be the same as the specified ranges; calculating a coefficient of correlation K corresponding to a difference between a vibration waveform and a knock waveform model while the specified crank angle is matched with a timing at which intensity peaks in the knock waveform model; and, if the coefficient of correlation K is larger than a threshold value K(0), determining that knock has occurred.
摘要翻译： 发动机ECU执行：对六个曲柄角范围中的每一个计算积分振动强度的15度积分值; 检测点火循环之间15度积分值的变化量; 指定具有较大变化量的两个范围; 指定在确定为与所述指定范围相同的搜索范围内具有大于相邻曲柄角的强度的曲柄角; 计算与所述爆震波形模型中的强度峰值的定时相匹配的振动波形与爆震波形模型之间的差值的相关系数K; 并且如果相关系数K大于阈值K（0），则确定发生了敲击。
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9.发明申请公开(公告)号：US20090120410A1
公开(公告)日：2009-05-14
申请号：US12263216
申请日：2008-10-31
申请人： Rihito Kaneko , Hiroto Tanaka , Satoshi Watanabe , Norihito Hanai , Yasuhiro Yamasako , Kenji Senda , Satoshi Masuda
发明人： Rihito Kaneko , Hiroto Tanaka , Satoshi Watanabe , Norihito Hanai , Yasuhiro Yamasako , Kenji Senda , Satoshi Masuda
IPC分类号： F02P5/15
CPC分类号： F02P5/152 , G01M15/042 , Y02T10/46
摘要： A 90° integrated value calculating unit of an engine ECU calculates a 90° integrated value obtained by integrating a magnitude. A calculating unit calculates a knock magnitude by dividing 90° integrated value by a BGL. A value obtained by subtracting a standard deviation σ from a median value of 90° integrated value is determined as the BGL. An ignition timing control unit controls the ignition timing depending on whether knock magnitude is equal to or larger than a determination value. A median value calculating unit calculates median value of 90° integrated value. A standard deviation calculating unit calculates standard deviation of 90° integrated value. A first stop unit stops updating of median value and standard deviation when 90° integrated value is smaller than a first threshold value or is equal to or larger than a second threshold value.
摘要翻译： 发动机ECU的90°积分值计算单元计算通过积分大小获得的90°积分值。 计算单元通过将90°积分值除以BGL来计算敲击量。 通过从90°积分值的中值减去标准偏差σ获得的值被确定为BGL。 点火正时控制单元根据爆震量是否等于或大于判定值来控制点火正时。 中值计算单元计算90°积分值的中值。 标准偏差计算单元计算90°积分值的标准偏差。 当90°积分值小于第一阈值或等于或大于第二阈值时，第一停止单元停止中值和标准偏差的更新。
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10.发明申请公开(公告)号：US20090217908A1
公开(公告)日：2009-09-03
申请号：US12395877
申请日：2009-03-02
申请人： Satoshi Watanabe , Hiroto Tanaka , Rihito Kaneko , Norihito Hanai , Kenji Senda , Satoshi Masuda
发明人： Satoshi Watanabe , Hiroto Tanaka , Rihito Kaneko , Norihito Hanai , Kenji Senda , Satoshi Masuda
CPC分类号： F02P5/1525 , F01L1/34 , F01L13/00 , F02P5/152 , G01L23/225 , Y02T10/46
摘要： An engine ECU executes a program including the steps of: calculating a knock magnitude N by dividing an integrated value lpkknk obtained by integrating the magnitude of vibration in the knock detection gate by BGL; controlling ignition timing according to a result of comparison between knock magnitude N and a determination value VJ; stopping updating of a standard deviation σ when it is determined that determination value VJ to be compared with knock magnitude N is to be changed; updating a median value VM by increasing an update amount of median value VM; and updating BGL according to median value VM and standard deviation σ.
摘要翻译： 发动机ECU执行程序，包括以下步骤：通过将通过将爆震检测门中的振动的积分积分得到的积分值lpkknk除以BGL来计算爆震大小N; 根据敲击量N与判定值VJ的比较结果控制点火正时; 当确定要与敲击量N进行比较的确定值VJ被改变时，停止标准偏差σ的更新; 通过增加中值VM的更新量来更新中值VM; 并根据中值VM和标准偏差σ更新BGL。
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