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    • 1. 发明专利
    • Control device for an automatic transmission
    • JP4731153B2
    • 2011-07-20
    • JP2004320797
    • 2004-11-04
    • ジヤトコ株式会社日産自動車株式会社
    • 達也 今村興治 土肥哲 瀬川寛 関谷孝治 齊藤
    • F16H61/14F16H59/18F16H59/46
    • F16H61/143F16H2061/145Y10T477/70Y10T477/75Y10T477/755
    • A control device of a lock-up clutch of a torque converter interposed between a transmission and engine used with a vehicle, is disclosed. The control device has a sensor which detects an input rotation speed to the torque converter, a sensor which detects an output rotation speed from the torque converter, a differential pressure control device which controls the differential pressure applied to the lock-up clutch, and a controller which sets a target slip rotation speed of the torque converter; calculates a real slip rotation speed which is a difference between the detected input rotation speed and the detected output rotation speed; and performs feedback control to determine the differential pressure applied to the lock-up clutch so that the real slip rotation speed coincides with the target slip rotation speed. The controller is programmed to: set the target slip rotation speed to a first target slip rotation speed determined from a vehicle running parameter; perform feedback control so that the real slip rotation speed coincides with the first target slip rotation speed; change over the first target slip rotation speed to a second target slip rotation speed according to an error between the first target slip rotation speed and the real slip rotation speed; after changing over, and perform feedback control so that the real slip rotation speed coincides with the second target slip rotation speed; wherein the first and second target slip rotation speeds are different functions of time.