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    • 32. 发明授权
    • Diagnostic apparatus for an exhaust gas sensor
    • 废气传感器诊断装置
    • US07021300B2
    • 2006-04-04
    • US10925150
    • 2004-08-25
    • Hidetaka MakiHiroshi KitagawaMasaki Tsuda
    • Hidetaka MakiHiroshi KitagawaMasaki Tsuda
    • F02D41/22F02D41/14G01M15/00
    • F02D41/1454F02D41/1456F02D41/1495
    • A deterioration failure diagnostic apparatus is provided for diagnosing an exhaust gas sensor disposed in an exhaust passage of an engine. The apparatus has a unit for generating a detecting signal and multiplying the generated signal to a first basic fuel injection amount to produce a second fuel injection amount. The apparatus includes a unit for calculating a feedback representative value based on feedback correction coefficients and multiplying the feedback representative value to the second fuel injection amount to produce a final fuel injection amount to be input to the engine. The apparatus includes a unit for extracting a frequency response corresponding to the detecting signal from an output of the exhaust gas sensor of the engine, the output being responsive to the calculated final fuel injection amount. A condition of the exhaust gas sensor is determined based on the extracted frequency response.
    • 提供了一种用于诊断设置在发动机的排气通道中的排气传感器的劣化破坏诊断装置。 该装置具有用于产生检测信号并将生成的信号与第一基本燃料喷射量相乘以产生第二燃料喷射量的单元。 该装置包括:用于基于反馈校正系数计算反馈代表值并将反馈代表值乘以第二燃料喷射量的单元,以产生要输入到发动机的最终燃料喷射量。 该装置包括用于从发动机的排气传感器的输出中提取与检测信号相对应的频率响应的单元,该输出响应于所计算的最终燃料喷射量。 基于所提取的频率响应来确定废气传感器的状况。
    • 33. 发明授权
    • Apparatus for detecting failure of exhaust gas sensor utilizing element temperature
    • 利用元件温度检测废气传感器故障的装置
    • US06935155B2
    • 2005-08-30
    • US10437458
    • 2003-05-14
    • Yuji YasuiHiroshi Kitagawa
    • Yuji YasuiHiroshi Kitagawa
    • G01N27/409F01N3/28F02D41/14F02D41/22F02D45/00G01N27/26G01N27/00F02D41/00
    • F02D41/222F02D41/1456F02D2041/288Y02T10/40
    • An apparatus for detecting a failure of an exhaust gas sensor disposed in an exhaust manifold is provided. The apparatus comprises a control unit. The control unit compares detection values of the exhaust gas sensor detected under different element temperatures of the exhaust gas sensor. The control unit detects a failure of the exhaust gas sensor based on the comparison result. In one embodiment, the different states include a state in which the element temperature is maintained at higher level and a state in which the element temperature is maintained at lower level. The element temperature can be controlled by a response assignment control scheme. In one embodiment, the detection values are subjected to a filtering process and/or a statistical process using a successive least squares method. The control unit compares the statistically processed detection values to detect a failure of the exhaust gas sensor.
    • 提供一种用于检测设置在排气歧管中的废气传感器的故障的装置。 该装置包括控制单元。 控制单元比较在废气传感器的不同元件温度下检测到的废气传感器的检测值。 控制单元根据比较结果来检测排气传感器的故障。 在一个实施例中,不同的状态包括元件温度保持在较高水平的状态和元件温度保持在较低水平的状态。 元件温度可以通过响应分配控制方案来控制。 在一个实施例中,使用连续最小二乘法对检测值进行滤波处理和/或统计处理。 控制单元将统计处理的检测值进行比较以检测废气传感器的故障。
    • 34. 发明申请
    • Diagnostic apparatus for an exhaust gas sensor
    • 废气传感器诊断装置
    • US20050061067A1
    • 2005-03-24
    • US10925150
    • 2004-08-25
    • Hidetaka MakiHiroshi KitagawaMasaki Tsuda
    • Hidetaka MakiHiroshi KitagawaMasaki Tsuda
    • F02D45/00F01N3/00F01N3/20F02D41/14G01M19/00
    • F02D41/1454F02D41/1456F02D41/1495
    • A deterioration failure diagnostic apparatus is provided for diagnosing an exhaust gas sensor disposed in an exhaust passage of an engine. The apparatus has a unit for generating a detecting signal and multiplying the generated signal to a first basic fuel injection amount to produce a second fuel injection amount. The apparatus includes a unit for calculating a feedback representative value based on feedback correction coefficients and multiplying the feedback representative value to the second fuel injection amount to produce a final fuel injection amount to be input to the engine. The apparatus includes a unit for extracting a frequency response corresponding to the detecting signal from an output of the exhaust gas sensor of the engine, the output being responsive to the calculated final fuel injection amount. A condition of the exhaust gas sensor is determined based on the extracted frequency response.
    • 提供了一种用于诊断设置在发动机的排气通道中的排气传感器的劣化破坏诊断装置。 该装置具有用于产生检测信号并将生成的信号与第一基本燃料喷射量相乘以产生第二燃料喷射量的单元。 该装置包括:用于基于反馈校正系数计算反馈代表值并将反馈代表值乘以第二燃料喷射量的单元,以产生要输入到发动机的最终燃料喷射量。 该装置包括用于从发动机的排气传感器的输出中提取与检测信号相对应的频率响应的单元,该输出响应于所计算的最终燃料喷射量。 基于所提取的频率响应来确定废气传感器的状况。