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US 7,115,063 B2Granted
Multiple gear stage automatic transmission
AssigneeZF Friedrichshafen AG
InventorsPeter Tiesler, Gerhard Gumpoltsberger
Life of this patent
Estimating the term…
Abstract
A multiple stage transmission of a planetary design having first, second and third planetary gear sets (P1, P2, P3), at least first, second, third, fourth, fifth sixth rotatable shafts (1, 2, 3, 4, 5, 6), first and second brakes (03, 04)and first, second, third and fourth clutches (14, 15, 36, 56). Selective engagement of the planetary gear sets (P1, P2, P3), the rotatable shafts (1, 2, 3, 4, 5, 6,), the brakes (03, 04) and the clutches (14, 15, 36, 56) produces different reduction ratios between the drive shaft and the driven shaft such that at least seven forward gears and at least one reverse gear are achieved.
Claims30
A multiple stage transmission of a planetary design for an automatic transmission of a motor vehicle, the multiple stage transmission comprising:
- a housing (G) accommodating:
- a drive shaft (1) and a driven shaft (2);
- a first planetary gear set (P1);
- a second planetary gear set (P2);
- a third planetary gear set (P3);
- at least third, fourth, fifth, and sixth rotatable shafts (3, 4, 5, 6) and a fixed shaft (0);
- at least first, second, third, fourth, fifth and sixth shifting elements (03, 04, 14, 15, 36, 56) including first and second brakes (03, 04) and first, second, third and fourth clutches (14, 15, 36, 56) which are selectively engageable to produce different gear ratios between the drive shaft (1) and the driven shaft (2) such that the transmission implements first, second, third, fourth, fifth, sixth and seventh forward gears and first and second reverse gears;
- the drive shaft (1) being permanently connectable with a ring gear of the first planetary gear set (P1) and, via the second clutch (15), with the fifth shaft (5) which is connected with a sun gear of the secondary planetary gear set (P2), and the fifth shaft (5) is connectable, via the fourth clutch (56), with the sixth shaft (6);
- the sixth shaft (6), adjacent a first side, being connected with a spider of the first planetary gear set (P1) and, adjacent a second side thereof, being releasably connectable, via the third clutch (36), with the third shaft (3) which is permanently connected with a spider of the second planetary gear set (P2) and with a spider of the third planetary gear set (P3), and the third shaft (3) being connectable, via the first brake (03), with the housing (G);
- the driven shaft (2) being connected with a ring gear of the third planetary gear set (P3) and a ring gear of the second planetary gear set (P2);
- the fourth shaft (4) being permanently connected with a sun gear of the third planetary gear set (P3), and the fourth shaft (4) being releasably connectable, via the first clutch (14), with the drive shaft (1) and being connectable, via the second brake (04), to the housing (G);
- and
- the fixed shaft (0) fixedly connecting a sun gear of the first planetary gear set (P1) with the housing (G).
10 more elements
A multiple stage transmission of a planetary design for an automatic transmission of a motor vehicle, the multiple stage transmission comprising:
- a housing (G) accommodating:
- a drive shaft (1) and a driven shaft (2);
- a first planetary gear set (P1);
- a second planetary gear set (P2);
- a third planetary gear set (P3);
- at least third, fourth, fifth, and sixth rotatable shafts (3, 4, 5, 6) and a fixed shaft (0);
- at least first, second, third, fourth, fifth and sixth shifting elements (03, 04, 14, 15, 36, 56) including first and second brakes (03, 04) and first, second, third and fourth clutches (14,15, 36, 56) which are selectively engageable to produce different gear ratios between the drive shaft (1) and the driven shaft (2) such that the transmission implements first, second, third, fourth, fifth, sixth, seventh and eighth forward gears and at least a first reverse gear;
- the drive shaft (1) being permanently connectable with a ring gear of the first planetary gear set (P1) and, via the second clutch (15), with the fifth shaft (5) which is connected with a sun gear of the secondary planetary gear set (P2), and the fifth shaft (5) is connectable, via the fourth clutch (56), with the sixth shaft (6);
- the sixth shaft (6), adjacent a first side, being connected with a spider of the first planetary gear set (P1) and, adjacent a second side thereof, being releasably connectable, via the third clutch (36), with the third shaft (3) which is permanently connected with a spider of the second planetary gear set (P2) and with a spider of the third planetary gear set (P3), and the third shaft (3) being connectable, via the first brake (03), with the housing (G);
- the driven shaft (2) being connected with a ring gear of the third planetary gear set (P3) and a ring gear of the second planetary gear set (P2);
- the fourth shaft (4) being permanently connected with a sun gear of the third planetary gear set (P3), and the fourth shaft (4) being releasably connectable, via the first clutch (14), with the drive shaft (1) and being connectable, via the second brake (04), to the housing (G);
- and
- the fixed shaft (0) fixedly connecting a sun gear of the first planetary gear set (P1) with the housing (G).
10 more elements
A multiple stage transmission of a planetary design for an automatic transmission of a motor vehicle, the multiple stage transmission comprising:
- a housing (G) accommodating:
- a drive shaft (1) and a driven shaft (2);
- a first planetary gear set (P1);
- a second planetary gear set (P2);
- a third planetary gear set (P3);
- at least third, fourth, fifth, and sixth rotatable shafts (3, 4, 5, 6) and a fixed shaft (0);
- at least first, second, third, fourth, fifth and sixth shifting elements (03, 04, 14, 15, 36, 56) including first and second brakes (03, 04) and first, second, third and fourth clutches (14, 15, 36, 56) which are selectively engageable to produce different gear ratios between the drive shaft (1) and the driven shaft (2) such that the transmission implements first, second, third, fourth, fifth, sixth, seventh and eighth forward gears and first and second reverse gears;
- the drive shaft (1) being permanently connectable with a ring gear of the first planetary gear set (P1) and, via the second clutch (15), with the fifth shaft (5) which is connected with a sun gear of the secondary planetary gear set (P2), and the fifth shaft (5) is connectable, via the fourth clutch (56), with the sixth shaft (6);
- the sixth shaft (6), adjacent a first side, being connected with a spider of the first planetary gear set (P1) and, adjacent a second side thereof, being releasably connectable, via the third clutch (36), with the third shaft (3) which is permanently connected with a spider of the second planetary gear set (P2) and with a spider of the third planetary gear set (P3), and the third shaft (3) being connectable, via the first brake (03), with the housing (G);
- the driven shaft (2) being connected with a ring gear of the third planetary gear set (P3) and a ring gear of the second planetary gear set (P2);
- the fourth shaft (4) being permanently connected with a sun gear of the third planetary gear set (P3), and the fourth shaft (4) being releasably connectable, via the first clutch (14), with the drive shaft (1) and being connectable, via the second brake (04), to the housing (G);
- and
- the fixed shaft (0) fixedly connecting a sun gear of the first planetary gear set (P1) with the housing (G).
10 more elements
Dependencies are inferred from the claim text.