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US 2015/0087464 A1Published application
Two mode continuously variable transmission
AssigneeGM Global Technology Operations LLC
InventorsEdward W. Mellet, James M. Hart
Life of this patent
Estimating the term…
Abstract
A two mode CVT is provided for a motor vehicle. The CVT includes a speed change device connected to a pulley and belt assembly. The pulley and belt assembly is connected to a planetary gear set arrangement. The planetary gear set arrangement generally includes two planetary gear sets, one brake and two clutches. The planetary gear set arrangement is connected to a final drive unit.
Claims19
A transmission for a motor vehicle comprising:
- a transmission input member;
- a transmission output member;
- a continuously variable unit having a first pulley in communication with the input member, a second pulley and an endless member wrapped around the first pulley and the second pulley;
- a planetary gear set assembly having first, second, third and fourth members;
- a first clutch for selectively connecting the second pulley to the first member of the planetary gear set assembly;
- a second clutch for selectively connecting the second pulley to the fourth member of the planetary gear set assembly;
- a brake for selectively connecting the third member of the planetary gear set assembly to a stationary member;
- and
- wherein torque is transferred from the input member to the output member through selective engagement of one of the first clutch and the second clutch thereby selectively connecting the second pulley to the planetary gear set assembly.
6 more elements
A transmission for a motor vehicle comprising:
- a transmission input member;
- a transmission output member;
- a continuously variable unit having a first pulley, a second pulley and an endless member wrapped around the first pulley and the second pulley;
- a first transfer gear connected for common rotation with the input member;
- a second transfer gear in mesh with the first transfer gear and connected for common rotation with the first pulley of the continuously variable unit;
- a planetary gear set assembly having first, second, third and fourth members;
- a first clutch for selectively connecting the second pulley to the first member of the planetary gear set assembly;
- a second clutch for selectively connecting the second pulley to the fourth member of the planetary gear set assembly;
- a brake for selectively connecting the third member of the planetary gear set assembly to a stationary member;
- and
- wherein torque is transferred from the input member to the output member through selective engagement of one of the first clutch and the second clutch thereby selectively connecting the second pulley to the planetary gear set assembly.
8 more elements
A transmission for a motor vehicle comprising:
- a transmission input member;
- a transmission output member;
- a continuously variable unit having a first pulley, a second pulley and an endless member wrapped around the first pulley and the second pulley;
- a first transfer gear connected for common rotation with the input member;
- a second transfer gear in mesh with the first transfer gear and connected for common rotation with the first pulley of the continuously variable unit;
- a planetary gear set assembly having a first sun gear, a second sun gear, a first carrier member, a second carrier member, a first ring gear and a second ring gear, wherein the first sun gear is connected for common rotation with the second sun gear and the first carrier member is connected for common rotation with the second ring gear and the output member;
- a first clutch for selectively connecting the second pulley to the first sun gear of the planetary gear set assembly;
- a second clutch for selectively connecting the second pulley to the second sun gear of the planetary gear set assembly;
- a brake for selectively connecting the second carrier member of the planetary gear set assembly to a stationary member;
- and
- wherein torque is transferred from the input member to the output member through selective engagement of one of the first clutch and the second clutch thereby selectively connecting the second pulley to the planetary gear set assembly.
8 more elements
Dependencies are inferred from the claim text.