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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：US07219006B2
公开(公告)日：2007-05-15
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
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.
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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
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。
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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
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。
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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
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。
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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：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
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。
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公开(公告)号：US07181338B2
公开(公告)日：2007-02-20
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
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。
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