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US 9,869,372 B2Granted
Multi-speed transmission
AssigneeFord Global Technologies, LLC
InventorsGregory Daniel Goleski, Reid Alan Baldwin
Life of this patent
Estimating the term…
Abstract
A family of transmission gearing arrangements produces ten forward and one reverse speed ratios by selective engagement of various combinations of four shift elements. Each disclosed transmission includes four planetary gearsets and six shift elements.
Claims12
A transmission comprising:
- a housing;
- input, output, and intermediate shafts;
- a first planetary gearset having a first sun gear selectively coupled to the housing, a first ring gear, a first carrier fixedly coupled to the input shaft, and a set of planet gears in continuous meshing engagement with the first sun gear and the first ring gear;
- a second planetary gearset having a second sun gear selectively coupled to the input shaft and selectively coupled to the intermediate shaft, a second ring gear, a second carrier fixedly coupled to the output shaft, and a set of planet gears in continuous meshing engagement with the second sun gear and the second ring gear;
- a third planetary gearset having a third sun gear fixedly coupled to the first ring gear and selectively coupled to the intermediate shaft, a third ring gear selectively coupled to the intermediate shaft, a third carrier fixedly coupled to the second ring gear, and a set of planet gears in continuous meshing engagement with the third sun gear and the third ring gear;
- and
- a fourth planetary gearset having a fourth sun gear coupled to the first sun gear, a fourth ring gear coupled to the housing, a fourth carrier coupled to the second ring gear, and a set of planet gears in continuous meshing engagement with the fourth sun gear and the fourth ring gear.
4 more elements
A transmission comprising:
- a first planetary gearset having a first carrier fixedly coupled to an input, a first sun, and a first ring;
- a second planetary gearset having a second carrier fixedly coupled to an output, a second sun, and a second ring
- a third planetary gearset having a third carrier fixedly coupled to the second ring, a third sun selectively coupled to the first sun, and a third ring fixedly held against rotation;
- and
- a fourth planetary gearset having a fourth carrier coupled to the second ring and the third carrier, a fourth sun coupled to the first ring, and a fourth ring.
2 more elements
A transmission comprising:
- a housing;
- an input shaft;
- an output shaft;
- a first planetary gearset having a first sun gear selectively coupled to the housing, a first ring gear, a first carrier fixedly coupled to the input shaft, and a set of planet gears in continuous meshing engagement with the first sun gear and the first ring gear;
- a second planetary gearset having a second sun gear selectively coupled to the input shaft, a second ring gear, a second carrier fixedly coupled to the output shaft, and a set of planet gears in continuous meshing engagement with the second sun gear and the second ring gear;
- a third planetary gearset having a third sun gear coupled to the first ring gear, a third ring gear, a third carrier coupled to the second ring gear, and a set of planet gears in continuous meshing engagement with the third sun gear and the third ring gear;
- and
- a fourth planetary gearset having a fourth sun gear selectively coupled to the first sun gear, a fourth ring gear fixedly coupled to the housing, a fourth carrier fixedly coupled to the second ring gear, and a set of planet gears in continuous meshing engagement with the fourth sun gear and the fourth ring gear.
5 more elements
Dependencies are inferred from the claim text.