Multi-speed transmission
First Claim
1. A multi-speed automatic transmission of a planetary design for a motor vehicle, the transmission comprising:
- an input shaft (1) and an output shaft (2) arranged in a housing (G);
first, second, third, and fourth planetary gear sets (P1, P2, P3, P4), and each of the first, the second, the third, and the fourth planetary gear sets (P1, P2, P3, P4) comprising a sun gear, a carrier and a ring gear;
at least third, fourth, fifth, sixth and seventh rotatable shafts (3, 4, 5, 6, 7) as well as at least six shifting elements (03, 04, 05, 14, 16, 26, 46, 57), comprising first, second, and third brakes (03, 04, 05) and first, second, and third, clutches (14, 16, 26, 48, 57), whose selective engagement creates different gear ratios between the input shaft (1) and the output shaft (2) so that at least nine forward gears and one reverse gear can be implemented;
wherein the input shaft (1) is permanently connected to the sun gear of the second planetary gear set (P2) and the sun gear of the third planetary gear set (P3);
the third shaft (3) is permanently connected to the carrier of the second planetary gear set (P2) and the ring gear of the first planetary gear set (P1), and is detachably connected, via the first brake (03), to the housing (G);
the fourth shaft (4) is permanently connected to the ring gear of the third planetary gear set (P3) and the carrier of the fourth planetary gear set (P4), and is detachably connected, via the second brake (04), to the housing (G);
the fifth shaft (5) is permanently connected to the sun gear of the fourth planetary gear set (P4) and the ring gear of the second planetary gear set (P2), and is detachably connected, via the third brake (05), to the housing (G), and, via the third clutch (57), to the seventh shaft (7);
the seventh shaft (7) is permanently connected to the carrier of the first planetary gear set (P1);
the sixth shaft (6) is permanently connected to the carrier of the third planetary gear set (P3) and detachably connected to the output shaft (2);
the output shaft (2) is permanently connected to the ring gear of the fourth planetary gear set (P4);
the sun gear of the first planetary gear set (P1) is fixed to the housing (G); and
one of;
the input shaft (1) is detachably connected, via the first clutch (14), to the fourth shaft (4);
the input shaft (1) is detachably connected, via the first clutch (16), to the sixth shaft (6); and
the fourth shaft (4) is detachably connected, via the first clutch (46), to the sixth shaft (6).
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-speed transmission with nine forward gears and one reverse gear, four planetary gear sets, seven shafts and six shifting elements. The input shaft is coupled to gear sets (P2, P3); shaft (3) is coupled to the carrier of gear set (P2) and the ring of gear set (P1) and is coupleable to the housing (G); shaft (4) is coupled to the ring of gear set (P3), the carrier of gear set (P4) and is coupleable to the housing; shaft (5) couples with gear set (P4) and the ring of gear set (P2) couples the housing (G), and via clutch (57) to shaft (7), which is coupled to the carrier of gear set (P1); shaft (6) is coupled to the carrier of gear set (P3) and coupleable via clutch (26) to output shaft which couples the ring of gear set (P4); the sun of gear set (P1) couples the housing.
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Citations
21 Claims
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1. A multi-speed automatic transmission of a planetary design for a motor vehicle, the transmission comprising:
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an input shaft (1) and an output shaft (2) arranged in a housing (G); first, second, third, and fourth planetary gear sets (P1, P2, P3, P4), and each of the first, the second, the third, and the fourth planetary gear sets (P1, P2, P3, P4) comprising a sun gear, a carrier and a ring gear; at least third, fourth, fifth, sixth and seventh rotatable shafts (3, 4, 5, 6, 7) as well as at least six shifting elements (03, 04, 05, 14, 16, 26, 46, 57), comprising first, second, and third brakes (03, 04, 05) and first, second, and third, clutches (14, 16, 26, 48, 57), whose selective engagement creates different gear ratios between the input shaft (1) and the output shaft (2) so that at least nine forward gears and one reverse gear can be implemented; wherein the input shaft (1) is permanently connected to the sun gear of the second planetary gear set (P2) and the sun gear of the third planetary gear set (P3); the third shaft (3) is permanently connected to the carrier of the second planetary gear set (P2) and the ring gear of the first planetary gear set (P1), and is detachably connected, via the first brake (03), to the housing (G); the fourth shaft (4) is permanently connected to the ring gear of the third planetary gear set (P3) and the carrier of the fourth planetary gear set (P4), and is detachably connected, via the second brake (04), to the housing (G); the fifth shaft (5) is permanently connected to the sun gear of the fourth planetary gear set (P4) and the ring gear of the second planetary gear set (P2), and is detachably connected, via the third brake (05), to the housing (G), and, via the third clutch (57), to the seventh shaft (7); the seventh shaft (7) is permanently connected to the carrier of the first planetary gear set (P1); the sixth shaft (6) is permanently connected to the carrier of the third planetary gear set (P3) and detachably connected to the output shaft (2); the output shaft (2) is permanently connected to the ring gear of the fourth planetary gear set (P4); the sun gear of the first planetary gear set (P1) is fixed to the housing (G); and one of; the input shaft (1) is detachably connected, via the first clutch (14), to the fourth shaft (4); the input shaft (1) is detachably connected, via the first clutch (16), to the sixth shaft (6); and the fourth shaft (4) is detachably connected, via the first clutch (46), to the sixth shaft (6). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification