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    • 5. 发明授权
    • Idle speed control device for an engine
    • 怠速发动机调速装置
    • US5513610A
    • 1996-05-07
    • US423445
    • 1995-04-19
    • Akio OkamotoHirohisa Kishi
    • Akio OkamotoHirohisa Kishi
    • F02D11/10F02D31/00F02D41/22F02M3/00
    • F02D31/005F02D41/221F02D2011/102F02D2011/103
    • The idle speed control device according to the present invention controls a two-solenoid rotary type idle speed control valve properly even when one of the solenoids fails. When one of the solenoids fails, the device calculates the amount of bypass air from the amount of inlet air and the degree of opening of the throttle valve, and estimates the degree of opening of the idle speed control valve. If the degree of opening of the bypass valve is larger than that of the neutral valve position, the device sets the duty ratio of the control signal for driving the idle speed control valve at 0%, and if the degree of opening of the idle speed control valve is less than that of the neutral valve position, the device sets the duty ratio of the control signal at 100%. By this control, the two-solenoid rotary type idle speed control valve is maintained at neutral valve position without determining the type of the failure of the solenoids precisely.
    • 根据本发明的怠速控制装置即使当其中一个螺线管故障时也适当地控制双电磁旋转怠速控制阀。 当其中一个螺线管故障时,该装置根据入口空气量和节流阀的开度计算旁路空气量,并估计怠速控制阀的开度。 如果旁通阀的开度大于中性阀位置的开度,则将该怠速控制阀的驱动控制信号的占空比设定为0%,如果怠速的开度 控制阀小于中性阀位置时,设备将控制信号的占空比设置为100%。 通过该控制,双电磁旋转式怠速转速控制阀保持在中性阀位置,而不会精确地确定螺线管的故障类型。