| 摘要 |
An automatic transmission has concentric first and second input shafts, and a parallel output shaft. A plurality of transmission gear trains are provided between the input shafts and the output shaft. An input switching shaft is arranged in parallel with the input shafts and the output shaft, and is provided with a first friction clutch switch switches into a power transmission state and a disconnection state with respect to the first input shaft, and a second friction clutch which switches into a power transmission state and a disconnection state with respect to the second input shaft. Engine power is bypassed to the input switching shaft so as to be transmitted to the output shaft via the first friction clutch or the second friction clutch and to effectively shorten the entire length of the transmission.
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