Automatic transmission apparatus with torque convertor planetary gear mechanism
AssigneeExedy Corporation
InventorMasahiro Ohkubo
Life of this patent
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Abstract
An automatic transmission apparatus has a transmission 3 having first and second input shafts 31 and 32 as well as a clutch or a brake, and also has a torque converter 2 having a main unit 10, a planetary gear train 11, lock-up clutch device 12 and a one-way clutch 35. The planetary gear train 11 has a ring gear r1 coupled to a turbine 16, planetary gears p1 meshing with the ring gear r1, a carrier 20 coupled to the first input shaft 31 of the transmission 3 and carrying the planetary gears p1, and a sun gear s1 coupled to a stator 17 and meshing with the planetary gears p1. The one-way clutch 35 transmits a power to the second input shaft 32 of the transmission 3 only when the stator 17 rotates reversely to the impeller 15 and turbine 16.
Claims15
An automatic transmission apparatus for selectively outputting power of an engine at a plurality of differing speeds, comprising:
- a transmission having first and second input portions configured to receive torque power, said transmission being configured for selectively transmitting the torque power at a plurality of differing speeds;
- and
- a torque converter disposed between the engine and said transmission, said torque converter having:
- an impeller, a turbine, a stator, a lock-up clutch device and a planetary gear train, said impeller being disposed on a first axial side of said turbine, said stator being disposed axially between said turbine and said impeller, said lock-up clutch and said planetary gear being disposed on a second axial side of said turbine,
- said planetary gear train comprising a ring gear connected to said turbine, a carrier coupled to said first input portion of said transmission carrying a planetary gear engaged with said ring gear, and a sun gear coupled to said stator and meshing with said planetary gear, and said planetary gear train being operable to supply output rotation of said torque converter from said carrier and said sun gear,
- said lock-up clutch device being configured for selectively directly transmitting torque from the engine to said carrier of said planetary gear train, and
- said stator being mounted on a one-way clutch, said one-way clutch being connected to said second input portion of said transmission for transmitting the torque to said second input portion of said transmission in response to rotation of said stator in a direction opposite a rotation direction of said impeller and said turbine.
Dependencies are inferred from the claim text.