| 摘要 |
PROBLEM TO BE SOLVED: To reduce a current value of a solenoid valve used for control of a lock-up clutch. SOLUTION: A lock-up control valve 550 changing over a supply destination of secondary pressure P (L/U) between an engagement-side oil chamber and a release-side oil chamber of a torque converter 200, includes a valve 600, a first port 611, a second port 612, a third port 613, a fourth port 614, and a drain port 616. The valve 600 includes a first land 601 and a second land 602. The diameter of the second land 602 is larger than that of the first land 601. Hydraulic pressure P (SOL) is supplied to the first port 611 and the second port 612 from the solenoid valve. When the valve 600 is in an OFF-position, a space 604 between the first land 601 and the second land 602 is released to the atmosphere. When the valve 600 is in an ON-position, the hydraulic pressure P (SOL) is supplied to the space 604. COPYRIGHT: (C)2008,JPO&INPIT
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