| 摘要 |
<p>An automatic transmission (20) changes a rotation speed of a main shaft (46), to which a torque from a power source (15) is transmitted via a clutch (45), and transmits the rotation of the changed rotation speed to a driveshaft (47). The automatic transmission (20) includes a drive dog (53, 54) provided on the main shaft (46) or on the driveshaft (47) so as to be in constant synchronous rotation with the main shaft (46), a driven dog (54, 53) provided on the main shaft (46) or on the driveshaft (47) so as to be in constant synchronous rotation with the driveshaft (47), a switching mechanism (50) for causing the drive dog (53, 54) and the driven dog (54, 53) to engage and disengage the drive dog (53, 54) and the drive dog (54, 53) to switch gears (Ma, Mb, Mc, Md, Me, Mf; Da, Db, Dc, Dd, De, and Df) transmitting a driving force between the main shaft (46) and the driveshaft (47), an actuator unit (51, 52) for actuating at least the switching mechanism (50) among the clutch (45) and switching mechanism (50), and a gear-change control means (80) for controlling a gear-change operation, including a dog engaging operation of making the actuator unit (51, 52) actuate to engage the drive dog (53, 54) and the driven dog (54, 53), based on a relative rotational position of the drive dog (53, 54) and the drive dog (54, 53) to be engaged.</p> |
