Control device for automatic transmission and control method for automatic transmission
AssigneesJATCO Ltd, Nissan Motor Co., Ltd.
InventorsMasahiro Hamano, Youji Itou, Haruka Kondo, Norihira Amano
Life of this patent
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Abstract
The present invention is a control device for an automatic transmission, the control device being adapted to control the automatic transmission including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein while a non-driving range of the automatic transmission is selected, determination on interlock in the stepped transmission mechanism is executed on the basis of deceleration of an output shaft of the stepped transmission mechanism and a change in the torque converter.
Claims7
A control device for an automatic transmission, the control device being adapted to control the automatic transmission included in a vehicle and including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein
- while a non-driving range of the automatic transmission is selected, and when deceleration of an output shaft of the stepped transmission mechanism is smaller than a predetermined negative value, determination on interlock in the stepped transmission mechanism is executed on the basis of a change in the torque converter, the deceleration of the output shaft of the stepped transmission mechanism is a negative value which reduces more as the vehicle is decelerating more.
A control method for an automatic transmission, the automatic transmission included in a vehicle and including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, the control method comprising:
- executing determination on interlock in the stepped transmission mechanism on the basis of a change in the torque converter while a non-driving range of the automatic transmission is selected, and when deceleration of an output shaft of the stepped transmission mechanism is smaller than a predetermined negative value, the deceleration of the output shaft of the stepped transmission mechanism is a negative value which reduces more as the vehicle is decelerating more.
A control device for an automatic transmission, the control device being adapted to control the automatic transmission included in a vehicle and including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein
- while a non-driving range of the automatic transmission is selected, and when deceleration of an output shaft of the stepped transmission mechanism is smaller than a predetermined negative value, determination on interlock in the stepped transmission mechanism is executed on the basis of a change in the torque converter, the deceleration of the output shaft of the stepped transmission mechanism is a negative value which reduces more as the vehicle is decelerating more.
Dependencies are inferred from the claim text.