Transmission with mixed planetary layshaft structure

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United States of America Patent

PATENT NO 8439787
APP PUB NO 20110230298A1
SERIAL NO

12954931

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A transmission includes an input member, an output member, a first and a second intermediate member, and a planetary gear set, all of which are coaxial and define a first axis of rotation. A first and a second layshaft are arranged to define a second axis of rotation and a third axis of rotation, respectively. Each of five sets of intermeshing gears transfer torque from a respective one of the intermediate members to a respective one of the layshafts via engagement of different respective ones of nine torque-transmitting mechanisms. A set of transfer gears transfers torque from the layshafts to the output member. One of the torque-transmitting mechanisms grounds a member of the planetary gear set to a stationary member. The nine torque-transmitting mechanisms are engagable in different combinations to establish up to eight forward speed ratios and at least one reverse speed ratio.

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Patent Owner(s)

  • GM GLOBAL TECHNOLOGY OPERATIONS LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Oreshkin, Vadim Evgenievich Moscow, RU 1 15
Raghavan, Madhusudan West Bloomfield, US 295 3739
Salamandra, Konstantin Borisovich Moscow, RU 11 78

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