Patent ID: 6860168

Claim:
An automatic transmission for a vehicle, comprising: a first input shaft provided with a plurality of drive gears; a second input shaft concentrically provided in said first input shaft so as to freely rotate and provided with a plurality of drive gears; an output shaft arranged in parallel with each of said input shafts and provided with the plurality of driven gears constantly engaging with said drive gears so as to respectively form transmission gear trains, a plurality of clutches for switching said plurality of transmission gear trains between a power transmission state and a disconnection state; an input switching shaft arranged in parallel with each of said input shafts and said output shaft; a first friction engagement element provided in said input switching shaft for switching between a state of transmitting the power to said first input shaft and the state of disconnecting the power; and a second friction engagement element provided to said input switching shaft and switching between a state of transmitting the power to said second input shaft and the state of disconnecting the power, wherein the engine power is bypassed to said input switching shaft such that the engine power is transmitted to said output shaft via said first friction engagement element or said second friction engagement element.