| 摘要 |
PURPOSE: To reduce the extent of storage capacity as well as to make improvements in speed by detecting a deviation between a target gear ratio and the actual one, operating an extent of input torque, and when this input torque is larger than the threshold value, compensating the gear ratio of a gear ratio altering means according to the learning value of the deviation. CONSTITUTION: Supposing that torque inputted into this transmission is varied, a torque shift due to elastic deformation, lost motion and suchlike in the transmission is produced, whereby the actual gear ratio causes a deviation from a target gear ratio. At this time, if input torque Tin exceeds a threshold value Tih, a deviation in the gear ratio detected by a deviation detecting means 202 is learned by a learning control means 210, compensating the gear ratio of a gear ratio altering means 201, and thus any deviation in the gear ratio due to secular deterioration or the like is solvable. If a threshold value Tth is set in an input torque area where a variation in the gear ratio becomes minuteness in relation to the change of the input torque, a learning map having set the gear ratio alone to a parameter is usable, and a storage means storing this map is made into the promotion of low capacity, therefore control processing speed is thus improvable. |
