Multi-speed transmission having four planetary gear sets
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United States of America Patent
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Apr 30, 2013
Grant Date -
Feb 21, 2013
app pub date -
Aug 17, 2011
filing date -
Aug 17, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A transmission is provided having an input member, an output member, two planetary gear sets, another two planetary gear sets that may be stacked or nested to form a planetary gear set assembly, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The stacked or nested planetary gear set assembly has a carrier member for rotatably supporting a first plurality of pinion gears and a second plurality of pinion gears, a ring gear and a common member. Further, the two other planetary gear sets may be configured to form a Simpson gear train. The torque transmitting devices include clutches and brakes.
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