Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Koji Kawasaki0
Takenori Matsue0
Date of Patent
January 17, 2017
0Patent Application Number
145234140
Date Filed
October 24, 2014
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A power transmission apparatus for a vehicle is provided which is equipped with a power split device and a speed variator. The power transmission device is designed to set a speed ratio of speed of rotation of an output of a power source to speed of rotation of a driven wheel in a power circulation mode of a power split device to lie within one of a positive range in which a sign of the speed ratio is positive and a negative range in which a sign of the speed ratio is negative. This results in a decrease in degree of torque acting on the speed variator such as a continuously variable transmission, thus permitting a required degree of durability of the speed variator to be reduced.
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