PROBLEM TO BE SOLVED: To enhance the accuracy of the normality determination of a solenoid.SOLUTION: When a detection value of a current flowing in a solenoid for operating a solenoid valve is within an abnormality range, a diagnosis method determines that the solenoid is abnormal, and when the solenoid is carried with electricity at a current value within a first normal range in which the solenoid valve is not operated in an abnormal state that the solenoid is determined to be abnormal, and also when the detected current value is within the first normal range, the method determines that the solenoid is temporarily normal. When a current value range is higher than the first normal range, and the solenoid is carried with electricity at a current value within a second normal range in which the solenoid valve is operated in a temporarily-normal state that the solenoid is determined to be temporarily normal, and also when the detected current value is within the second normal range, the method determines that the solenoid is normal.SELECTED DRAWING: Figure 3
【課題】ソレノイドの正常判定の精度を高めること。【解決手段】ソレノイドバルブを作動させるためのソレノイドに流れる電流の検出値が異常範囲内にある場合、前記ソレノイドが異常と判定し、前記ソレノイドが異常と判定された異常状態において、前記ソレノイドバルブが作動しない第1の正常範囲内の電流値で前記ソレノイドを通電させ、検出された電流値が第1の正常範囲内にある場合、前記ソレノイドが仮正常と判定し、前記ソレノイドが仮正常と判定された仮正常状態において、電流値範囲が第1の正常範囲よりも高く且つ前記ソレノイドバルブが作動する第2の正常範囲内の電流値で前記ソレノイドを通電させ、検出された電流値が第2の正常範囲内にある場合、前記ソレノイドが正常と判定する、診断方法。【選択図】図3
SOLENOID CONTROL DEVICE AND DIAGNOSIS METHOD
ソレノイド制御装置及び診断方法
2018-04-05
Patent
Electronic Resource
Japanese
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