| 摘要 |
PURPOSE: A manual shift control method of an automatic transmission is provided to improve travel experience by enhancing shifting performance with reduced shift shock occurring at the final stage of shifting. CONSTITUTION: With an input of a shifting signal from fourth level to second level, a first shift control solenoid valve is turned off upon shift start detection while a second shift control solenoid valve is turned on from an off state for certain time after shift start. A third shift control solenoid valve is sustained in an on state. First and second pressure control solenoid valves(PSCV-A,B) are duty-controlled. Thus, down skip from fourth to second is performed. In a manual shift condition, power condition is decided in a first power condition decision map. In a power on condition, the first and second pressure control solenoid valves perform power on manual shift from fourth to second. In a power off condition, the first and second pressure control solenoid valves perform power off manual shift from fourth to second. Thereby, shift is completed.
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