| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic control system of a torque converter enhancing the durability of a friction member by properly carrying out operation control of a lock-up clutch. <P>SOLUTION: The torque converter having the lock-up clutch operating or not operating by hydraulic pressure difference of an operating side chamber and non operating side chamber includes a first oil path communicating with the non operating side chamber, a second oil path, a third oil path communicating with the operating side chamber, a lock-up switch valve and a torque converter hydraulic control valve communicating with the first, second and third oil paths, the lock-up switch valve and the torque converter hydraulic control valve generate pressure difference between the second and third oil paths communicating to the operation side chamber to circulate fluid in the lock-up on state of the lock-up clutch, the pressure difference between the second and third oil paths communicating to the operation side chamber is made larger more than in the lock-up on state to circulate the fluid in a lock-up slip condition. <P>COPYRIGHT: (C)2013,JPO&INPIT |
