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US 2006/0052212 A1Published application
Six-speed powertrain of an automatic transmission
AssigneeHyundai Motor Company
InventorJong Sool Park
Life of this patent
Estimating the term…
Abstract
Durability and power transmission efficiency are enhanced in a six-speed powertrain of an automatic transmission by a scheme that includes first to forth planetary gearsets. The first planetary gearset includes a first sun gear, first ring gear, and first carrier. The second planetary gearset includes a second sun gear, a second ring gear, and a second carrier. The third planetary gearset includes operational elements of a third sun gear, a third ring gear, and a third carrier. The fourth planetary gearset includes a fourth sun gear, a fourth ring gear, and a fourth carrier. The powertrain also includes an input shaft, an output gear, and a transmission case.
Claims24
A six-speed powertrain of an automatic transmission, comprising:
- a first planetary gearset having operational elements of a first sun gear, a first ring gear, and a first carrier;
- a second planetary gearset having operational elements of a second sun gear, a second ring gear, and a second carrier;
- a third planetary gearset having operational elements of a third sun gear, a third ring gear, and a third carrier;
- a fourth planetary gearset having operational elements of a fourth sun gear, a fourth ring gear, and a fourth carrier;
- an input shaft;
- an output gear;
- and
- a transmission case,
- wherein:
- the first ring gear is fixedly connected to the third carrier and the fourth ring gear;
- the first carrier is fixedly connected to the fourth carrier;
- the first sun gear is fixedly connected to the second sun gear;
- the second ring gear is always stationary by being fixedly connected to the transmission case;
- the third sun gear always acts as an input element by being fixedly connected to the input shaft;
- the third carrier always acts as an output element by being fixedly connected to the output gear;
- the fourth sun gear is variably connected to the input shaft via a first clutch;
- at least one of the fixedly connected first and fourth carriers is variably connected to the input shaft via a second clutch;
- the second carrier is variably connected to the third ring gear via a third clutch;
- at least one of the fixedly connected first and fourth carriers is variably connected to the transmission case via a first brake and is subject to a stopping operation of the first brake;
- and
- the second carrier is variably connected to the transmission case via a second brake and is subject to a stopping operation of the second brake.
18 more elements
A six-speed powertrain of an automatic transmission, comprising:
- a first planetary gearset having first, second, and third operational elements that occupy sequential positions in a lever diagram;
- a second planetary gearset having fourth, fifth, and sixth operational elements that occupy sequential positions in a lever diagram;
- a third planetary gearset having seventh, eighth, and ninth operational elements that occupy sequential positions in a lever diagram;
- a fourth planetary gearset having tenth, eleventh, and twelfth operational elements that occupy sequential positions in a lever diagram;
- an input shaft;
- an output shaft;
- and
- a transmission case,
- wherein:
- the first operational element is fixedly connected to the eighth operational element and the tenth operational element;
- the second operational element is fixedly connected to the eleventh operational element;
- the third operational element is fixedly connected to the sixth operational element;
- the fourth operational element is always stationary by being fixedly connected to the transmission case;
- the seventh operational element always acts as an input element by being fixedly connected to the input shaft;
- the eighth operational element always acts as an output element by being fixedly connected to the output gear;
- the twelfth operational element is variably connected to the input shaft via a first clutch;
- at least one of the fixedly connected second and eleventh operational elements is variably connected to the input shaft via a second clutch;
- the fifth operational element is variably connected to the ninth operational element via a third clutch;
- at least one of the fixedly connected second and eleventh operational elements is variably connected to the transmission case via a first brake and is subject to a stopping operation of the first brake;
- and
- the fifth operational element is variably connected to the transmission case via a second brake and is subject to a stopping operation of the second brake.
18 more elements
Dependencies are inferred from the claim text.