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    • 1. 发明授权
    • NOx sensor diagnostic device and exhaust gas purifying system using the device
    • NOx传感器诊断装置和使用该装置的废气净化系统
    • US07921706B2
    • 2011-04-12
    • US12349631
    • 2009-01-07
    • Shinya Sumitani
    • Shinya Sumitani
    • G01M15/00
    • G01M15/102F02D41/008F02D41/1461F02D41/1463F02D41/222G01N33/0037Y02A50/245Y02T10/40
    • A NOx sensor diagnostic device includes a NOx sensor disposed in an exhaust passage of an engine, an output value obtaining device for obtaining an output value of the NOx sensor, a spray characteristics changing device for changing spray characteristics for a specific cylinder of cylinders of the engine, and a diagnostic device for diagnosing abnormality of the NOx sensor, based on the output value of the NOx sensor that is changed as a result of the change of the spray characteristics for the specific cylinder by the spray characteristics changing device. An exhaust gas purifying system includes a NOx removal system disposed in an exhaust passage of an engine, a NOx sensor disposed in the exhaust passage at least on an upstream side of the NOx removal system in a flow direction of exhaust air flowing through the exhaust passage, and the NOx sensor diagnostic device.
    • NOx传感器诊断装置包括设置在发动机的排气通道中的NOx传感器,用于获得NOx传感器的输出值的输出值获取装置,用于改变特定气缸的喷射特性的喷雾特性改变装置 发动机和用于诊断NOx传感器的异常的诊断装置,其基于由喷雾特性改变装置改变特定气缸的喷雾特性而改变的NOx传感器的输出值。 排气净化系统包括设置在发动机的排气通道中的NOx去除系统,NOx传感器,其至少在NOx排出系统的上游侧沿流动排气通道的排气的流动方向布置在排气通道中 ,和NOx传感器诊断装置。
    • 2. 发明申请
    • ABNORMALITY DETECTION DEVICE
    • 异常检测装置
    • US20100211291A1
    • 2010-08-19
    • US12510365
    • 2009-07-28
    • Shinya SumitaniKazuhiko Ooshima
    • Shinya SumitaniKazuhiko Ooshima
    • F02D45/00
    • F02D41/0085F02D41/1498F02D41/16F02D41/221F02D41/34Y02T10/44
    • An abnormality detection device determines whether an injection correction amount of each cylinder at the time when maximum rotation numbers are equalized is outside a normal range if the equalization of the maximum rotation numbers among cylinders is completed in an idle stable state. The abnormality detection device determines that an abnormality exists on an injector side if the injection correction amount of a specific cylinder is outside the normal range and a rotation number fluctuation difference of the specific cylinder is in a normal range. The abnormality detection device determines that the abnormality exists on an engine side if the injection correction amount of a specific cylinder is outside the normal range and the rotation number fluctuation difference of the specific cylinder is outside the normal range.
    • 如果在空转稳定状态下完成气缸中的最大转数的均衡,则异常检测装置判定在最大转数是否相等的情况下,每个气缸的喷射校正量是否在正常范围之外。 如果特定气缸的喷射校正量在正常范围之外且特定气缸的旋转数差异在正常范围内,则异常检测装置确定在喷射器侧存在异常。 如果特定气缸的喷射校正量超出正常范围并且特定气缸的旋转数差异超出正常范围,则异常检测装置确定在发动机侧存在异常。