HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic control device for an automatic transmission for a vehicle capable of favorably restricting undershooting of engine rotation speed or speed change shock caused by that even when engine output torque fluctuation factors are generated in power-off upshifting.

SOLUTION: When it is determined that prescribed control for upshifting is started as an accelerator pedal 50 is not operated by a power-off upshifting control start determining means 102, in a case where it is determined that such factors as to fluctuate input torque TINin the automatic transmission 14 are generated by an input torque fluctuation factor generation determining means 104, engagement pressure of a prescribed hydraulic friction engagement device is corrected by correction quantity in accordance with the factors to fluctuate the input torque TINby a hydraulic pressure correction control means 114. Even when the output torque fluctuating factors for the engine 10 are generated, undershooting of the engine rotation speed NEor speed change shock caused by that is thus favorably restricted.

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