LINEAR SOLENOID VALVE CURRENT CONTROL METHOD

• Main Authors: NAKAJIMA HISAMITSU, SAKAMOTO NAOKI, TSUNASHIMA KOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• Subjects: BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a linear solenoid valve current control method capable of making PWM period variable and after this processing, capable of realizing a superior hydraulic control.SOLUTION: A linear solenoid valve current control method modulating a coil current with pulse width for driving linear solenoids of linear solenoid valves [107a, 107b] for adjusting pressure of working oil of hydraulic type clutches [CL1, CL2] for disconnecting or connecting rotational driving force transmitted from a power force source of a vehicle to a driving wheel is operated in such a way that a period of the pulse width modulation is set to be short as a connection degree from a disconnected state of the hydraulic clutches [CL1, CL2] becomes large [S31, S32, S33]. In this case, it is also applicable that the period of pulse width modulation is set in response to a variation in duty ratio corresponding to the hydraulic pressure corresponding to the connection degree.SELECTED DRAWING: Figure 11 【課題】PWM周期を可変としたうえで良好な油圧制御を実現することのできるリニアソレノイドバルブの電流制御方法を提供する。【解決手段】車両の動力源から駆動輪に伝達される回転駆動力を断接する油圧式クラッチ（ＣＬ１，ＣＬ２）の作動油の圧力を調整するリニアソレノイドバルブ（１０７ａ，１０７ｂ）のリニアソレノイドを駆動するコイル電流をパルス幅変調するリニアソレノイドバルブの電流制御方法において、前記油圧式クラッチ（ＣＬ１，ＣＬ２）の切断状態からの接続度合いが大きくなるに従い、前記パルス幅変調の周期が短く設定されている（Ｓ３１，Ｓ３２，Ｓ３３）。ここで、接続度合いに対応する油圧に応じたデューティ比の変化に応じてパルス幅変調の周期を設定しておくようにしておいてもよい。【選択図】図１１