Ball type continuously variable transmission/infinitely variable transmission
AssigneeDana Corporation
InventorsMark R.J. Versteyhe, Matthias W.J. Byltiauw, James F. Ziech
Life of this patent
Estimating the term…
Abstract
A variable transmission includes an input shaft, a planetary gear set drivingly engaged with a variator comprising, a variator carrier assembly, a first ring assembly, and a second ring assembly; and the output shaft, arranged with various combinations of brakes and clutches to produce transmissions with continuously variable or infinitely variable torque output ratios.
Claims70
A variable transmission comprising:
- an input shaft;
- a planetary gear set drivingly engaged with the input shaft;
- a first brake mechanically coupled to an outer ring gear of the planetary gear set;
- a variator comprising a variator carrier assembly, a first ring assembly, and a second ring assembly, the variator mechanically coupled to a ring gear of the planetary gear set;
- and
- a second brake mechanically coupled to a sun gear of the planetary gear set and to a first ring assembly of the variator
- a second ring assembly of the variator drivingly engaged to an output of the variable transmission.
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A variable transmission comprising:
- an input shaft;
- a planetary gear set having a ring gear drivingly engaged with the input shaft;
- a variator comprising a variator carrier assembly, a first ring assembly, and a second ring assembly, the second ring assembly driving engaged to an output of the variable transmission;
- a planetary gear carrier coupled to a first brake and to the first ring assembly;
- and
- a sun gear coupled to a second brake and a variator carrier.
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A variable transmission comprising:
- an input shaft;
- a variator comprising a first ring assembly, a second ring assembly, and a carrier assembly, wherein the second ring assembly is drivingly engaged to an output of the variable transmission;
- a planetary gear set comprising a sun gear drivingly engaged with the input shaft, a ring gear drivingly engaged with a variator carrier of the carrier assembly, and one or more planet gears on a planet carrier, the planet gears disposed in mechanical engagement between the sun gear and the ring gear;
- a first brake coupled to the ring gear and configured to hold the ring gear fixed when the first brake is engaged;
- and
- a second brake coupled to the planet carrier and the first ring assembly, and configured to hold the planet carrier fixed when the second brake is engaged.
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A variable transmission comprising:
- an input shaft;
- a variator comprising a first ring assembly, a second ring assembly, and a carrier assembly, wherein the second ring assembly is drivingly engaged to the output of the variable transmission;
- a planetary gear set comprising a sun gear drivingly engaged with the input shaft, a ring gear drivingly engaged with the first ring assembly, and one or more planet gears on a planet carrier, the planet gears disposed in mechanical engagement between the sun gear and the ring gear;
- a first brake coupled to the first ring assembly and configured to hold the ring gear of the planetary gear set and the first ring assembly fixed when the first brake is engaged;
- and
- a second brake coupled to the planet carrier and a variator carrier of the carrier assembly, and configured to hold the planet carrier and the variator carrier fixed when the second brake is engaged.
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A variable transmission comprising:
- an input shaft;
- a clutch comprising a first clutch member coupled to the input shaft and a second clutch member;
- a variator comprising a first ring assembly having the second clutch member formed thereon, a second ring assembly drivingly engaged to an output of the variable transmission, and a carrier assembly;
- a planetary gear set comprising a sun gear drivingly engaged with the input shaft, one or more planet gears on a planet carrier that is drivingly engaged with a variator carrier of the carrier assembly, wherein a ring gear of the planetary gear set is held fixed;
- and
- a first brake coupled to the first ring assembly configured to hold the first ring assembly fixed when the first brake is engaged,
- wherein the first ring assembly is drivingly engaged with the input shaft when the first clutch member engages the second clutch member.
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Dependencies are inferred from the claim text.