| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control device that stably learns lock-up clutch pressure in a startup lock-up slip control even at vehicle startup. <P>SOLUTION: When a maximum-time actual engine rotational speed N<SB POS="POST">E</SB>max at a maximum differential rotational speed N<SB POS="POST">S</SB>of a lock-up clutch 34 during a startup slip control is lower than a maximum-time target engine rotational speed N<SB POS="POST">E</SB>*max that increases in accordance with a maximum-time estimated engine torque T<SB POS="POST">E</SB>'max at the maximum differential rotational speed N<SB POS="POST">S</SB>, the control device determines that a lock-up clutch torque T<SB POS="POST">LU</SB>is excessive, and corrects a lock-up clutch pressure P<SB POS="POST">LU</SB>in the startup slip control to a low pressure side by learning. Thereby, the control device can stably detect fluctuations in the lock-up clutch torque T<SB POS="POST">LU</SB>during startup transition of the vehicle. By using the engine torque T<SB POS="POST">E</SB>and the engine rotational speed N<SB POS="POST">E</SB>at the maximum differential rotational speed N<SB POS="POST">S</SB>, the control device can stably learn even during a startup transition period of the vehicle when many fluctuation factors depending on hardware exist. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
