| 摘要 |
PURPOSE: A shift control method of an automatic transmission is provided to prevent shift shock by braking after run-up with increasing a high duty control signal through learning the duty control signal, and by learning the low duty valve in not forming run-up again. CONSTITUTION: A control unit performs the kick down learning module in kick down shifting, and decides to satisfy the learning condition(S100). Transmission stored in a memory is set in satisfying the learning condition, and the range is set according to RPM(Revolution Per Minute) of a turbine(S110). The accumulated counter is decided to be 3 more than the reference value in generating run-up again by kick down shifting(S130). The control unit outputs a duty control signal to a driving unit for braking by high hydraulic pressure with learning the high duty control signal(S140). The duty control value is learned with detecting the duty in the release part. Shift shock is prevented with learning the low duty value in not continuously generating run-up from high hydraulic pressure.
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