Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
January 13, 2009
Patent Application Number
11490014
Date Filed
July 21, 2006
Patent Primary Examiner
Patent abstract
An automatic transmission, wherein an electric motor is between a couple of clutch shafts of twin-clutch type automatic transmission. The torque and speed of the electric motor establishes a smooth and efficient gear shifting control, and enables a creep control, idling stop starting control, R-to-D, and D-to-R selecting control. As the friction control of the clutch is not performed, smooth gear shift work can be realized. The same control scheme allows creep control, idling stop starting control, R-to-D, and D-to-R selecting control to be enabled, which leads to such an effect that the life is extended without the clutch being worn away.
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