CONTROL DEVICE OF LINEAR SOLENOID VALVE
To suppress a large variation of the output hydraulic pressure of a linear solenoid valve.SOLUTION: A hydraulic pressure command value of a linear solenoid valve is set. Subsequently, a current command value of a solenoid portion is set in such a manner that the current command value becomes large a...
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Zusammenfassung: | To suppress a large variation of the output hydraulic pressure of a linear solenoid valve.SOLUTION: A hydraulic pressure command value of a linear solenoid valve is set. Subsequently, a current command value of a solenoid portion is set in such a manner that the current command value becomes large as the hydraulic pressure command value becomes large. Then, when a first condition that a current command value increase rate being an increase amount of the current command value per unit time is equal to or higher than a first threshold is not established, a dither command value of a first amplitude is set, and when the first condition is established, a dither command value of a second amplitude which is equal to or larger than zero, and smaller than the first amplitude is set. Furthermore, a current based on the current command value and the dither command values is supplied to the solenoid portion.SELECTED DRAWING: Figure 4
【課題】リニアソレノイドバルブの出力油圧が大きく変動するのを抑制する。【解決手段】リニアソレノイドバルブの油圧指令値を設定する。続いて、油圧指令値が大きいほど大きくなるようにソレノイド部の電流指令値を設定する。そして、電流指令値の単位時間当たりの増加量である電流指令値増加率が第1閾値以上である第1条件が成立していないときには、第1振幅のディザ指令値を設定し、第1条件が成立しているときには、値0以上でありかつ第1振幅よりも小さい第2振幅のディザ指令値を設定する。さらに、電流指令値とディザ指令値とに基づく電流をソレノイド部に供給する。【選択図】図4 |
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