Control method for dual clutch transmission, dual clutch transmission, and vehicle loaded with same

A dual clutch transmission which includes at least a first input shaft configured to be connected to a first clutch and a second input shaft configured to be connected to a second clutch, and in which a set of odd-numbered gears and a set of even-numbered gears are arranged respectively across the first input shaft and an output shaft and across the second input shaft and the output shaft, and in a case of starting transmission of power from a power source to the output shaft, the transmission of the power is started by synchronously engaging a start gear being one of the gears for start to the second input shaft and connecting the second clutch to the second input shaft, the dual clutch transmission comprising:

• a support gear disposed on the first input shaft and having a gear ratio different from that of the start gear;
• and
• a rotation disconnecting mechanism between the support gear and the first input shaft, the rotation disconnecting mechanism being configured to let the support gear freewheel when the transmission of the power from the power source to the output shaft is started by synchronously engaging the start gear and the support gear to the second input shaft and the first input shaft, respectively, and simultaneously bringing each of the first clutch and the second clutch into a connected state.