| 摘要 |
AUTOMATIC TRANSMISSION An automatic transmission (100) which includes a number of gear trains equal to the number of speeds between a primary shaft (SP) and a countershaft (SC) and performs 5 connection and disconnection of rotational driving force between the crankshaft (SI) and a gearbox by means of twin hydraulic clutches including first and second clutches (CLI and CL2). The first and second clutches are disposed on the axis of the primary shaft (SP) back to back with a primary gear (GP) interposed therebetween. Oil passages (4 and 5) can be therefore formed into a more simple shape than those formed by a method to in which twin clutches are accommodated in a single case and can be configured to have a same total length. The first and second clutches are of a same component. The first clutch (CL1) performs connection and disconnection for first and third speeds, and the second clutch (CL2) performs connection and disconnection for second and fourth speeds. |
