| 摘要 |
PROBLEM TO BE SOLVED: To generate an initial differential pressure at lock up time in a large value of limit without a shock, by eliminating an influence by dispersion of a lock up clutch connection differential pressure control system. SOLUTION: A lock up clutch connection differential pressure PL/ S(new) for starting a fine slip in the preceding time updated by learning is read (S71), this read PL/ S(new) , coefficient Sa and surplus differential pressureΔPL according to throttle opening are used, a lock up initial differential pressure PLS is calculated by PLS=PLS(new)×Sa -ΔPL, and this corresponding duty D is output to a lock up solenoid (S72). In this way, a lock up clutch connection differential pressure PL is increased at a stroke to the initial differential pressure PLS at instantaneous time t1 of lock up command, a lock up response delay is eliminated, and thereafter, the lock up clutch connection differential pressure PL is gradually increased (S73). In PL/ S(new) , by taking into consideration dispersion by a solid difference of a differential pressure control system, the initial differential pressure PLS is prevented from receiving an influence of dispersion.
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