| 摘要 |
An upshift control system and method of an automatic transmission. The system includes a vehicle speed detector outputting a vehicle speed signal; a transmission control unit for receiving the signal, calculating a target hydraulic pressure based on a change of the vehicle speed, and outputting a control signal corresponding to the target hydraulic pressure; and an actuator for controlling an actual hydraulic pressure of an on-coming element based on the control signal. The method includes determining whether a vehicle speed changes during an upshift; calculating the change of the vehicle speed; calculating a target hydraulic pressure based on the change of the vehicle speed; and controlling an actual hydraulic pressure of an on-coming element based on the target hydraulic pressure. The target hydraulic pressure may be calculated by adding a modified hydraulic pressure, proportional to the rate of change of the vehicle speed, to a constant reference hydraulic pressure.
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