| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hydraulic control circuit of power transmission device for vehicle capable of improving fuel consumption when a lock-up clutch is out of operation. <P>SOLUTION: When the lock-up clutch 26 is in non-operation state, the hydraulic control circuit of the power transmission device for vehicle is capable of switching a modulator pressure P<SB POS="POST">LPM</SB>to either a high pressure modulator pressure P<SB POS="POST">LPMH</SB>or a low pressure modulator pressure P<SB POS="POST">LPML</SB>in accordance with a first switching pressure P<SB POS="POST">SL1</SB>of a first solenoid valve SL1 and a second switching pressure P<SB POS="POST">SL2</SB>of a second solenoid valve SL2. As the modulator pressure P<SB POS="POST">LPM</SB>can be appropriately made into a low pressure modulator pressure P<SB POS="POST">LPML</SB>even if the lock-up clutch 26 is in a non-operative state, consequently the energy consumed in an oil pump 102 becomes smaller, resulting in improvement in fuel consumption. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
