CONTINUOUSLY VARIABLE TRANSMISSION WITH CHAIN OUTPUT

摘要

A multi-mode continuously variable transmission in a powertrain of a motor vehicle includes a continuously variable unit connected to a planetary gear set arrangement. The planetary gear set arrangement generally includes two planetary gear sets, two brakes, and one clutch and provides multiple modes of ratio selection between the continuously variable unit and a transmission output member. The transmission output member is connected to a chain driven final having only three axes of rotation.

主权项

1. A powertrain for a motor vehicle comprising:
a transmission input member; a transmission output member; an intermediate member; a continuously variable unit having a first pulley pair connected for common rotation with the transmission input member, a second pulley pair connected for common rotation with the intermediate member, and an endless member wrapped around the first pulley pair and the second pulley pair; a first planetary gear set connected to the intermediate member; a second planetary gear set connected to the first planetary gear member and to the transmission output member; a plurality of torque transmitting mechanisms interconnected to the planetary gear arrangement; a chain drive connected for common rotation with the transmission output member; a transfer member connected for common rotation with the chain drive; and a final drive planetary gear set connected for common rotation with the transfer member, wherein selective engagement of the plurality of torque transmitting mechanisms and selective movement of the first pulley and second pulley provides two forward ranges of continuous gear ratios between the transmission input member and the transmission output member.