# US 7,611,438 B2 · Multispeed transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,611,438 B2 - Document ID: US7611438B2 - Status: Granted - Kind: B2 - Application number: 11/660,416 - Filed: 2004-10-27 - Published: 2007-11-08 - Granted: 2009-11-03 - Earliest claimed: 2004-08-27 - Assignees: ZF Friedrichshafen AG - Inventors: Gabor Diosi; Josef Haupt; Gerhard Gumpoltsberger; Peter Ziemer; Martin Brehmer - Web page: https://patentgrep.com/patent/US7611438B2 ## CPC - F16H 3/66: composed of a number of gear trains without drive passing from one train to another - F16H 2200/006: the gear ratios comprising eight forward speeds - F16H 2200/201: with three sets of orbital gears - F16H: GEARING ## Abstract A transmission with forward and reverse gears includes a drive and an output shaft, planetary sets, shafts and shift elements. The drive shaft communicates with a sun gear of the second planetary set and a shaft which communicates with the carrier of the first planetary set, and to the housing and is connectable with another shaft, which communicates with the carrier of the second planetary set and communicates with a shaft. This shaft communicates with sun gear of the first planetary set and the ring gear of the third planetary set. A shaft communicates with the ring gear of the second planetary set and the carrier of the third planetary set and can couple to the housing. A shaft communicates with the sun gear of the third planetary set and to the housing. The output shaft communicates with the ring gear of the first planetary set. ## Claims ### Claim 1 A multispeed automatic transmission, of a planetary gear design, for a motor vehicle, the transmission comprising: a drive shaft (1) and an output shaft (2) located within a housing (G); first, second and third planetary gear sets (P1, P2, P3); at least additional third, fourth, fifth, sixth and seventh rotating shafts (3, 4, 5, 6, 7); a plurality of shift elements (03, 04, 05, 15, 57, 67), including first, second and third brakes (03, 04, 05) and first, second and third clutches (15, 57, 67), whose selective engagement results in a plurality transmission gear ratios between the drive shaft (1) and the output shaft (2) and achieves at least eight forward gears and at least one reverse gear; a sun gear of the second planetary gear set (P2) being fixed the drive shaft (1) and being detachably coupled, via the first clutch (15), with the fifth shaft (5); a carrier of the first planetary gear set (P1) being fixed to the fifth shaft (5) and being detachably coupled, via the third brake (05), to the housing (0), and being detachably coupled, via the second clutch (57), to the seventh shaft (7); a carrier of the second planetary gear set (P2) being fixed to the seventh shaft (7) and being detachably coupled, via the third clutch (67), to the sixth shaft (6); a sun gear of the first planetary gear set (P1) and a ring gear of the third planetary gear set (P3) being fixed to the sixth shaft (6); a ring gear of the second planetary gear set (P2) and a carrier of the third planetary gear set (P3) being fixed to the first shaft (3) and being detachably coupled, via the first brake (03), with the housing (G); a sun gear of the third planetary gear set (P3) being fixed to the fourth shaft (4) and being detachably coupled, via the second brake (04), with the housing (G); and a ring gear of the first planetary gear set (P1) being fixed to the output shaft (2). ### Claim 2 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the second planetary gear set (P2) is sequential located, in an axially direction of the transmission, behind the third planetary gear set (P3) and the first planetary gear set (P1) is sequential located behind the second planetary gear set (P2). ### Claim 3 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the first, the second and the third planetary gear sets (P1, P2, P3) are negative planetary gear sets. ### Claim 4 (depends on 1) The multispeed automatic transmission according to claim 1, wherein in an axial direction of the transmission the first, the second and the third clutches (15, 57, 67) are located between the second planetary gear set (P2) and the first planetary gear set (P1). ### Claim 5 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the third clutch (67), when viewed radially of the transmission, is located radially above the second clutch (57) and the first clutch (57, 15). ### Claim 6 (depends on 1) The multispeed automatic transmission according to claim 1, wherein an outer disc carrier of the third clutch (67), when viewed radially of the transmission, is located radially above the second clutch (57) and the first clutch (15). ### Claim 7 (depends on 1) The multispeed automatic transmission according to claim 1 wherein an outer disc carrier of the second clutch (57), when viewed radially of the transmission, is located radially above the first clutch (15). ### Claim 8 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the third clutch (67), when viewed axially of the transmission, is located between the second planetary gear set (P2) and the first planetary gear set (P1). ### Claim 9 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the third clutch (67), when viewed radially of the transmission, is located substantially at a radial height of the sun gear of the second planetary gear set (P2). ### Claim 10 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the first clutch (15), when viewed radially of the transmission, is located radially above the second clutch (57). ### Claim 11 (depends on 10) The multispeed automatic transmission according to claim 10, wherein the first clutch (15) and the second clutch (57) have a common interior disc carrier. ### Claim 12 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the first clutch (15) and the second clutch (57), when viewed axially in a power flow direction through the transmission, are located behind the first planetary set (P1). ### Claim 13 (depends on 1) The multispeed automatic transmission according to claim 1, wherein a first forward gear results from engagement of the second clutch (57), the second brake (04) and the third brake (05, 04), a second forward gear results from engagement of the first brake (03), the second brake (03, 04) and the second clutch (57), a third forward gear results from engagement of the second clutch (57), the third clutch (57, 67) and the second brake (04), a fourth forward gear results from engagement of the first clutch (15), the second clutch (57) and the second brake (04), a fifth forward gear results from engagement of the first clutch (15), the second clutch (57) and the third clutch (67), a sixth forward gear results from engagement of the first clutch (15), the third clutch (67) and the second brake (04), a seventh forward gear results from engagement of the first clutch (15), the third clutch (67) and the first brake (03) and an eighth forward gear results from engagement of the first clutch (15), the first brake (03) and the second brake (04). ### Claim 14 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the at least one reverse gear results from engagement of one of: the second brake (04), the third brake (05) and the third clutch (67), and the first brake (03), the third brake (05) and the third clutch (67). ### Claim 15 (depends on 1) The multispeed automatic transmission according to claim 1, wherein at least one additional override clutch is located at any suitable position within the transmission. ### Claim 16 (depends on 15) The multispeed automatic transmission according to claim 15, the at least one override clutch is located between one of the drive shaft (1), the output shaft (2), the third, the fourth, the fifth, the sixth and the seventh rotating shafts (3, 4, 5, 6, 7) and the housing (G). ### Claim 17 (depends on 1) The multispeed automatic transmission according to claim 1, wherein the drive shaft (1) and the output shaft (2) extend from a same side of the housing (G). ### Claim 18 (depends on 1) The multispeed automatic transmission according to claim 1, wherein at least one of an axial differential and a distributor differential is located on one of the drive shaft (1) and the output shaft (2). ### Claim 19 (depends on 1) The multispeed automatic transmission according to claim 1, wherein an additional clutch element separates the drive shaft (1) from a motor of the vehicle. ### Claim 20 (depends on 19) The multispeed automatic transmission according to claim 19, wherein the additional clutch element is one of a hydro-dynamic converter, a hydro-dynamic clutch, a dry starting clutch, a wet starting clutch, a magnetic powder clutch and a centrifugal force clutch. ### Claim 21 (depends on 1) The multispeed automatic transmission according to claim 1, wherein an external starting element is located, in a power flow direction, behind the transmission, and the drive shaft (1) is fixed to a crankshaft of a motor of the vehicle. ### Claim 22 (depends on 1) The multispeed automatic transmission according to claim 1, wherein driving movement of the vehicle is initiated by engagement of one of the second brake (04) and the third brake (05), and the drive shaft (1) constantly communicates with a crankshaft of a motor of the vehicle. ### Claim 23 (depends on 1) The multispeed automatic transmission according to claim 1, wherein a torsion oscillation dampener is located between a motor of the vehicle and the transmission. ### Claim 24 (depends on 1) The multispeed automatic transmission according to claim 1, wherein a wear-free brake is located on at least one of the drive shaft (1), the output shaft (2), the third rotating shaft (3), the fourth rotating shaft (4), the fifth rotating shaft (5), the sixth rotating shaft (6) and the seventh rotating shaft (7). ### Claim 25 (depends on 1) The multispeed automatic transmission according to claim 1, wherein a power take-off is located on at least one of the drive shaft (1), the output shaft (2), the third rotating shaft (3), the fourth rotating shaft (4), the fifth rotating shaft (5), the sixth rotating shaft (6) and the seventh rotating shaft (7) to provide power to an additional unit. ### Claim 26 (depends on 25) The multispeed automatic transmission according to claim 25, the power take-off is located on one of the drive shaft (1) and the output shaft (2). ### Claim 27 (depends on 1) The multispeed automatic transmission according to claim 1, wherein each of the plurality of shift elements (03, 04, 05, 15, 57, 67) is one of a power shift clutch and a power shift brake. ### Claim 28 (depends on 27) The multispeed automatic transmission according to claim 27, wherein each of the power shift clutches and the power shift brakes is one of a multiple disc clutch, a strap brake and a cone clutch. ### Claim 29 (depends on 1) The multispeed automatic transmission according to claim 1, wherein each of the plurality of shift elements (03, 04, 05, 15, 57, 67) is one of a frictional brake and a frictional clutch. ### Claim 30 (depends on 1) The multispeed automatic transmission according to claim 1, wherein at least one of a generator and an additional power machine is located on at least one of the drive shaft (1), the output shaft (2), the third rotating shaft (3), the fourth rotating shaft (4), the fifth rotating shaft (5), the sixth rotating shaft (6) and the seventh rotating shaft (7).