Automatic transmission

Details Automatic transmission Automatic transmission

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 3/091 (2006.01) F16H 3/10 (2006.01)

Patent

CA 2537016

To provide an automatic transmission which includes oil passages with a simple structure provided for twin clutches and allows the number of production steps to be reduced. In an automatic transmission which includes a number of gear trains equal to the number of speeds between a primary shaft SP and a countershaft SC and performs 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 CL1 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 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.

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