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    • 24. 发明授权
    • Abnormality determination apparatus and abnormality determination method for valve characteristics change mechanism
    • 阀门特性变化机理异常判定装置及异常判定方法
    • US07921711B2
    • 2011-04-12
    • US12471645
    • 2009-05-26
    • Minoru Noda
    • Minoru Noda
    • G01M13/02
    • F01L1/344F01L2001/186F01L2800/00F01L2800/11F02D13/02F02D41/221F02D2041/001Y02T10/18Y02T10/40
    • To an electronic control unit is connected a shaft position detection sensor that outputs, as a shaft position detection value, a signal whose magnitude changes stepwise by a predetermined amount in correspondence with the position of a control shaft of a valve characteristics change mechanism. The electronic control unit stores in advance, as a determination reference value, the drive amount of an actuator at the time when the magnitude of the shaft position detection value changes. The electronic control unit performs normality determination to indicate that the valve characteristics change mechanism is operating normally when the drive amount at the time when the shaft position detection value changes along with driving of the actuator and the determination reference value correspond to each other, and performs abnormality determination to indicate that an abnormality is occurring in the valve characteristics change mechanism when the drive amount and the determination reference value do not correspond to each other.
    • 电子控制单元连接有轴位置检测传感器,其作为轴位置检测值输出其幅度相应于阀特性变化机构的控制轴的位置而逐步改变预定量的信号。 电子控制单元作为确定基准值预先存储在轴位置检测值的大小变化时的驱动器的驱动量。 当所述轴位置检测值随着所述致动器的驱动而变化的驱动量和所述判定基准值相对应时,所述电子控制单元执行正常判定,以指示所述阀特性变化机构正常运行,并执行 当驱动量和确定基准值彼此不对应时,指示在阀特性变化机构中发生异常的异常确定。