| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To maintain a connection state of a power generating source with a belt type continuously variable transmission more properly during a time from operation stopping until restarting of the power generating source. <P>SOLUTION: A hydraulic circuit 50 for the power transmission system including a CVT comprises an oil pump 24 driven by an engine, a regulator valve 51 regulating the pressure of the working fluid from the oil pump 24 and supplying it to a primary cylinder 47 or the like, a linear solenoid valve SLS regulating the pressure of the working fluid from the oil pump 24 and supplying it to a clutch C1 of a forward or backward switching mechanism, an electromagnetic pump 70 capable of sucking in and discharging the working fluid, and a switching valve 60 capable of supplying the working fluid from the linear solenoid valve SLS to the clutch C1 when working fluid is discharged from the oil pump 24 or supplying the working fluid from the electromagnetic pump 70 to the clutch C1 when the working fluid is not discharged from the oil pump 24. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
