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US 2016/0298734 A9Published application
Seven speed dual clutch transmission
AssigneeGM Global Technology Operations LLC
InventorsMikael B. Mohlin, Tejinder Singh, Patrick S. Portell, David M. Zini
Life of this patent
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Abstract
A transmission includes an input member, an output member, first and second interconnecting members, first and second countershaft members, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.
Claims38
A transmission comprising:
- an input member;
- an output member;
- a plurality of gear sets, wherein each gear set has a first gear in mesh with a second gear;
- a plurality of interconnecting members, wherein each of the first gears of each of the plurality of gear sets are fixed for common rotation to one of the plurality of interconnecting members and each of the plurality of interconnecting members are selectively connected to the input member by one of a plurality of torque transmitting mechanisms;
- a plurality of countershafts, wherein each of the second gears of the plurality of gear sets are selectively connected for common rotation to one of the plurality of countershafts;
- and
- a plurality of synchronizer assemblies each selectively coupling one of a pair of the second gears of the plurality of gear sets to one of the plurality of countershafts, and
- wherein the selective engagement of one of a plurality of torque transmitting mechanisms and one of the plurality of synchronizer assemblies establishes one of a plurality of forward speed ratios between the input member and the output member.
5 more elements
A transmission comprising:
- an input member;
- an output member;
- a plurality of gear sets, wherein each gear set has a first gear in mesh with a second gear;
- a plurality of interconnecting members, wherein each of the first gears of each of the plurality of gear sets are fixed for common rotation to one of the plurality of interconnecting members and each of the plurality of interconnecting members are selectively connected to the input member by one of a plurality of torque transmitting mechanisms;
- a plurality of countershafts, wherein each of the second gears of the plurality of gear sets are selectively connected for common rotation to one of the plurality of countershafts;
- a differential assembly having an output gear, and wherein the plurality of countershafts each include a transfer gear in constant mesh with the output gear of the differential assembly;
- a park gear and a park transfer gear, wherein the park gear is rotatably supported by one of the plurality of countershafts and rotatably connected to a park transfer gear which is in constant mesh with the output gear of the differential assembly;
- a plurality of synchronizer assemblies each selectively coupling one of a pair of the second gears of the plurality of gear sets to one of the plurality of countershafts, and
- wherein the selective engagement of one of a plurality of torque transmitting mechanisms and one of the plurality of synchronizer assemblies establishes one of a plurality of forward speed ratios between the input member and the output member.
6 more elements
Dependencies are inferred from the claim text.