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US 2016/0258513 A1Published application
Multi-stage transmission for vehicle
AssigneeHyundai Motor Company
InventorsWon Min CHO, Jae Chang KOOK, Myeong Hoon NOH, Seong Wook JI, Kang Soo SEO, Seong Wook HWANG
Life of this patent
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Abstract
A multi-stage transmission for a vehicle may include an input shaft, an output shaft, first, second, third, and fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first, second, third, and fourth planetary gear devices having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices.
Claims7
A multi-stage transmission for a vehicle comprising:
- an input shaft;
- an output shaft;
- first, second, third, and fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first, second, third, and fourth planetary gear devices having three rotary elements;
- and
- at least six shifting elements connected to the rotary elements of the planetary gear devices,
- wherein a first rotary element of the first planetary gear device is disposed to be fixable by one shifting element of the at least six shifting elements, a second rotary element of the first planetary gear device is continuously connected to a second rotary element of the third planetary gear device and a third rotary element of the fourth planetary device, and a third rotary element of the first planetary gear device is continuously connected to a first rotary element of the second planetary gear device and a third rotary element of the third planetary gear device,
- wherein a second rotary element of the second planetary gear device is continuously connected to the input shaft, and a third rotary element of the second planetary gear device is selectively connected to a first rotary element and the second rotary element of the third planetary gear device, wherein the first rotary element of the third planetary gear device is selectively connected to a first rotary element and a second rotary element of the fourth planetary gear device, respectively, and
- wherein the first rotary element of the fourth planetary gear device is disposed to be fixable by another shifting element of the at least six shifting elements, and the second rotary element of the fourth planetary gear device is continuously connected to the output shaft.
5 more elements
A multi-stage transmission for a vehicle comprising:
- first, second, third and fourth planetary gear devices each having three rotary elements;
- six shifting elements configured to selectively provide frictional force;
- and
- first, second, third, fourth, fifth, sixth, seventh, and eighth rotary shafts connected to the rotary elements of the first, second, third and fourth planetary gear devices,
- wherein the first rotary shaft is an input shaft directly connected to a second rotary element of the second planetary gear device, the second rotary shaft is directly connected to a first rotary element of the first planetary gear device, the third rotary shaft is directly connected to a second rotary element of the first planetary gear device, a second rotary element of the third planetary gear device and a third rotary element of the fourth planetary gear device, the fourth rotary shaft is directly connected to a third rotary element of the first planetary gear device, a first rotary element of the second planetary gear device and a third rotary element of the third planetary gear device, the fifth rotary shaft is directly connected to a third rotary element of the second planetary gear device, the sixth rotary shaft is directly connected to a first rotary element of the third planetary gear device, the seventh rotary shaft is directly connected to a first rotary element of the fourth planetary gear device, the eighth rotary shaft is an output shaft directly connected to a second rotary element of the fourth planetary gear device, and
- wherein the six shifting elements include first, second, third, fourth, fifth, and sixth clutches, the first clutch is disposed between the sixth rotary shaft and the eighth rotary shaft, the second clutch is disposed between the second rotary shaft and a transmission case, the third clutch is disposed between the third rotary shaft and the transmission case, the fourth clutch is disposed between the fifth rotary shaft and the sixth rotary shaft, the fifth clutch is disposed between the sixth rotary shaft and the seventh rotary shaft, and the sixth clutch is disposed between the third rotary shaft and the fifth rotary shaft.
3 more elements
Dependencies are inferred from the claim text.