To provide a control device of an automatic transmission, which quickly turns on a lockup clutch without inducing a shock and prevents fuel consumption performance from being lowered and durability of the lockup clutch from being lowered.
The control device performs steps of: calculating the reduction amount of the rotation speed of an engine needed to absorb the target slip amount of the lockup clutch, calculating a target engagement time of the lockup clutch from the reduction amount and calculating transmission torque of the lockup clutch in such a manner that inertia torque of the engine or the like reaches the maximum in the middle of the calculated target engagement time (S14); calculating a main control amount based on the above calculation (S20); calculating a feedback control amount based on the deviation between the target slip amount and an actual slip amount (S30); calculating a learning correction amount from the calculated feedback control amount (S34); and controlling a supply oil pressure to the lockup clutch based on a value obtained by correcting the main control amount with the learning correction amount (S20).
INAGAWA YASUSHI
SAEKI ATSUHIRO
MATSUDA TAKAHIRO
| JP2004324893A | 2004-11-18 | |||
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| JP2008121750A | 2008-05-29 | |||
| JP2007231870A | 2007-09-13 | |||
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| JP2000145950A | 2000-05-26 | |||
| JP2008303958A | 2008-12-18 | |||
| JP2000240786A | 2000-09-05 |
| WO2010125672A1 | 2010-11-04 |