| 摘要 |
PROBLEM TO BE SOLVED: To secure the variable speed line following performance for the gear change ratio at the time of a regular gear change and the fixed gear change ratio setup while restricting the inertia torque generated on a transmission input shaft during speed change transition. SOLUTION: The upper and the lower limit values (S1-S4, S6-S8) of a target input numbers of rotation variation are set up from the throttle opening degree on the pressing amount of the vehicle accelerator pedal, the basic target input number of rotation which is set up from the vehicle speed and the actual output numbers of rotation etc. as the target change ratio after last correction. The upper and the lower limit values (S5, S9) of variation of the target gear change ratio are calculated from the target input numbers of rotation variation and the basic target change gear rate is made to be the target change gear ratio after correction when the change gear ratio deviation from the basic target change gear ratio to the one after last correction does not exceed the upper and the lower limit value of the target gear variation. When exceeded, the upper and the lower limit values of the target change gear ratio are added to the last target change gear ratio after correction so as to set a target change gear ratio after correction, which is output (S10), thus controlling the gear change ratio of the automatic transmission for the vehicle based on the target gear change ratio after correction, in the speed change control device of the automatic transmission for vehicle. COPYRIGHT: (C)2010,JPO&INPIT |
