| 摘要 |
PROBLEM TO BE SOLVED: To avoid the interference due to the fluctuation of pressure among pulley control pressure which is set by adjusting pressure of oil discharged from an oil pump and clutch control pressure and lubrication pressure which are set by adjusting its drain pressure. SOLUTION: In a clutch control pressure control valve 29 which sets clutch control pressure Pc by adjusting drain pressure of line pressure Ps which gives tensile force required for torque transmission to a secondary pulley 9c of a continuously variable transmission 9 by adjusting discharge pressure from an oil pump 21, clutch control pressure Pc is adjusted for line pressure Ps in such a manner that a difference in pressure becomes substantially 1.5kgf/cm<2> and in a lubrication pressure control valve 50 which sets lubrication pressure PL by adjusting drain pressure of clutch control pressure Pc, lubrication pressure PL is adjusted for clutch control pressure Pc in such a manner that a difference in pressure becomes substantially 1.5kgf/cm<2> . |
