SOLENOID VALVE DEVICE

摘要

A pressure adjusting valve section 40 functioning as a linear solenoid valve for adjusting clutch pressure of a clutch C2 and a pump section 60 functioning as a solenoid pump for pumping hydraulic oil to a clutch C1 are formed by a sleeve 22 and a spool 24, and driven by a single solenoid section 30. In the pump section 60, when switching the solenoid section 30 off from on, the spool 24 is moved towards the solenoid section 30 by biasing force of a spring 28 and a pressure inside a pump chamber 70 becomes negative, thereby sucking hydraulic oil. When switching the solenoid section 30 on from off, the spool 24 is moved towards an end plate 26 by thrust force of the solenoid section 30 and a pressure inside the pump chamber 70 becomes positive, thereby discharging the hydraulic oil sucked.