# US 2014/0155216 A1 · Multi-speed automatic transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155216 A1 - Document ID: US20140155216A1 - Status: Published application - Kind: A1 - Application number: 13/693,101 - Filed: 2012-12-04 - Published: 2014-06-05 - Earliest claimed: 2012-12-04 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Donald E. Hoffman - Web page: https://patentgrep.com/patent/US20140155216A1 ## CPC - F16H 3/78: Special adaptation of synchronisation mechanisms to these gearings - F16H 3/663: {with conveying rotary motion between axially spaced orbital gears, e.g. a stepped orbital gear or Ravigneaux} - F16H 3/666: {with intermeshing orbital gears (F16H3/663 takes precedence)} - F16H 2003/445: {without permanent connection between the input and the set of orbital gears} - F16H 2200/006: the gear ratios comprising eight forward speeds - F16H 2200/2007: with two sets of orbital gears - F16H 2200/2023: using a Ravigneaux set with 4 connections - F16H 2200/2046: with six engaging means - F16H: GEARING ## Abstract A power transmission includes an input, output, a planetary gearset including a first sun gear, a first ring gear, a first carrier driveably connected to the input, first pinions supported on the first carrier and meshing with the first sun gear, and second pinions supported on the first carrier and meshing with the first ring gear and first pinions, and a second planetary gearset including a second sun gear, a third sun gear, a second ring gear driveably connected to the output, a second carrier, third pinions supported on the second carrier and meshing with the second sun gear and second ring gear, and fourth pinions supported on the second carrier and meshing with the third sun gear and the third pinions. ## Claims ### Claim 1 A power transmission (8), comprising: an input (10); an output (12); a planetary gearset including: a first sun gear (22); a first ring gear (24); a first carrier (26) driveably connected to the input (10) first pinions (28) supported on the first carrier and meshing with the first sun gear; second pinions (24) supported on the first carrier and meshing with the first ring gear and first pinions; a second planetary gearset including: a second sun gear (42); a third sun gear (44); a second ring gear (46) driveably connected to the output; a second carrier (48); third pinions (50) supported on the second carrier and meshing with the second sun gear and the second ring gear; fourth pinions (52) supported on the second carrier and meshing with the third sun gear and the third pinions. ### Claim 2 (depends on 1) The power transmission of claim 1, further comprising: a first clutch (56) for releasably connecting the first ring gear and the third sun gear (44); a second clutch (58) for releasably connecting the first ring gear and the second sun gear (42); a first brake (62) for releasably holding the second carrier (48) against rotation; a second brake (66) for releasably holding the first sun gear (22) against rotation; a third clutch (60) for releasably connecting the first sun gear (22) and the second sun gear (42); a fourth clutch (64) for releasably connecting the second carrier (48) and the input. ### Claim 3 (depends on 2) The power transmission of claim 2, wherein each forward gear and reverse gear produced by the transmission results from concurrent engagement of three of the clutches and brakes and concurrent disengagement of three of the clutches and brakes. ### Claim 4 A power transmission (70), comprising: an input (10); an output (12); a planetary gearset including: a first sun gear (22); a first ring gear (24) driveably connected to the input (10); a first carrier (74); first pinions (76) supported on the first carrier and meshing with the first sun gear and the first ring gear; a second planetary gearset including: a second sun gear (42); a third sun gear (44); a second ring gear (46) driveably connected to the output; a second carrier (48); second pinions (50) supported on the second carrier and meshing with the second sun gear and the second ring gear; third pinions (52) supported on the second carrier and meshing with the third sun gear and the second pinions. ### Claim 5 (depends on 4) The power transmission of claim 4, further comprising: a first clutch (56) for releasably connecting the first carrier and the third sun gear (44); a second clutch (58) for releasably connecting the first carrier and the second sun gear (42); a first brake (62) for releasably holding the second carrier (48) against rotation; a second brake (66) for releasably holding the first sun gear (22) against rotation; a third clutch (60) for releasably connecting the first sun gear (22) and the second sun gear (42); a fourth clutch (64) for releasably connecting the second carrier (48) and the input. ### Claim 6 (depends on 5) The power transmission of claim 5, wherein each forward gear and reverse gear produced by the transmission results from concurrent engagement of three of the clutches and brakes and concurrent disengagement of three of the clutches and brakes. ### Claim 7 A power transmission (80), comprising: an input (10); an output (12); a planetary gearset including: a first sun gear (22); a first ring gear (24); a first carrier (26) driveably connected to the input (10) first pinions (28) supported on the first carrier and meshing with the first sun gear; second pinions (29) supported on the first carrier and meshing with the first ring gear and first pinions; a second planetary gearset including: a second sun gear (84); a third sun gear (86); a second ring gear (88) driveably connected to the output; a second carrier (90); third pinions (92) supported on the second carrier and meshing with the third sun gear; fourth pinions (94) supported on the second carrier and meshing with the second sun gear, the third pinions and the second ring gear. ### Claim 8 (depends on 7) The power transmission of claim 7, further comprising: a first clutch (56) releasably connecting the first ring gear and the third sun gear (86); a second clutch (58) adjacent to the first clutch and releasably connecting the first ring gear and the second sun gear (84); a first brake (62) releasably holding the second carrier (90) against rotation; a second brake (66) releasably holding the first sun gear (22) against rotation; a third clutch (60) releasably connecting the first sun gear (22) and the second sun gear (84); a fourth clutch (64) releasably connecting the second carrier (90) and the input. ### Claim 9 (depends on 8) The power transmission of claim 8, wherein each forward gear and reverse gear produced by the transmission results from concurrent engagement of three of the clutches and brakes and concurrent disengagement of three of the clutches and brakes. ### Claim 10 A power transmission (100), comprising: an input (10); an output (12); a planetary gearset including: a first sun gear (102) driveably connected to the input (10); a first ring gear (104); a first carrier (106); first pinions (108) supported on the first carrier and meshing with the first sun gear; second pinions supported on the first carrier and meshing with the first ring gear and the first pinions; a second planetary gearset including: a second sun gear (84); a third sun gear (86); a second ring gear (88) driveably connected to the output; a second carrier (90); third pinions (92) supported on the second carrier and meshing with the third sun gear; fourth pinions (94) supported on the second carrier and meshing with the second sun gear, the third pinions and the second ring gear. ### Claim 11 (depends on 10) The power transmission of claim 10, further comprising: a first clutch (56) releasably connecting the first ring gear (104) and the third sun gear (86); a second clutch (58) adjacent to the first clutch and releasably connecting the first ring gear (104) and the second sun gear (84); a first brake (62) releasably holding the second carrier (90) against rotation; a second brake (66) releasably holding the first carrier (106) against rotation; a third clutch (60) releasably connecting the first carrier (106) to the second sun gear (84); a fourth clutch (64) releasably connecting the second carrier (90) and the input. ### Claim 12 (depends on 11) The power transmission of claim 11, wherein each forward gear and reverse gear produced by the transmission results from concurrent engagement of three of the clutches and brakes and concurrent disengagement of three of the clutches and brakes.