# US 9,752,661 B1 · Planetary gear train of automatic transmission for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,661 B1 - Document ID: US9752661B1 - Status: Granted - Kind: B1 - Application number: 15/374,690 - Filed: 2016-12-09 - Granted: 2017-09-05 - Earliest claimed: 2016-09-13 - Assignees: Hyundai Motor Company - Applicants: Hyundai Motor Company - Inventors: Jae Chang Kook; Seongwook Ji; Woo Jin Chang; Wonmin Cho; Hyun Sik Kwon; Seong Wook Hwang; Ki Tae Kim - Web page: https://patentgrep.com/patent/US9752661B1 ## CPC - F16H 3/66: composed of a number of gear trains without drive passing from one train to another - F16H 2200/0069: the gear ratios comprising ten forward speeds - F16H 2200/2012: with four sets of orbital gears - F16H 2200/2046: with six engaging means - F16H: GEARING ## Abstract The present disclosure provides a planetary gear train of an automatic transmission for a vehicle including an input shaft, an output shaft, four planetary gear sets respectively having three rotational elements, and six control elements for selectively interconnecting the rotational elements and a transmission housing. ## Claims ### Claim 1 A planetary gear train of an automatic transmission for a vehicle, comprising: an input shaft configured to receive an engine torque; an output shaft configured to output a shifted torque; a first planetary gear set having a first, a second, and a third rotational elements; a second planetary gear set having a fourth, a fifth, and a sixth rotational elements; a third planetary gear set having a seventh, an eighth, and a ninth rotational elements; a fourth planetary gear set having a tenth; an eleventh, and a twelfth rotational elements; a first shaft connected to the first rotational element and the fourth rotational element; a second shaft connected to the second rotational element and connected to the input shaft; a third shaft connected to the third rotational element and the seventh rotational element; a fourth shaft connected to the fifth rotational element, the eighth rotational element; and the twelfth rotational element; a fifth shaft connected to the sixth rotational element; a sixth shaft connected to the ninth rotational element; a seventh shaft connected to the tenth rotational element, and selectively connected to the second shaft, the third shaft, and the sixth shaft respectively; and an eighth shaft connected to the eleventh rotational element, selectively connected to the sixth shaft, and connected to the output shaft. ### Claim 2 (depends on 1) The planetary gear train of claim 1, wherein the first shaft and the fifth shaft are selectively connected to a transmission housing respectively. ### Claim 3 (depends on 2) The planetary gear train of claim 2, further comprising: a first clutch selectively connecting the second shaft and the seventh shaft; a second clutch selectively connecting the third shaft and the seventh shaft; a third clutch selectively connecting the sixth shaft and the eighth shaft; a fourth clutch selectively connecting the sixth shaft and the seventh shaft; a first brake selectively connecting the first shaft and the transmission housing; and a second brake selectively connecting the fifth shaft and the transmission housing. ### Claim 4 (depends on 1) The planetary gear train of claim 1, wherein: the first, the second, and the third rotational elements of the first planetary gear set are respectively a first sun gear, a first planet carrier, and a first ring gear of the first planetary gear set; the fourth, the fifth, and the sixth rotational elements of the second planetary gear set are respectively a second sun gear, a second planet carrier, and a second ring gear of the second planetary gear set; the seventh, the eighth, and the ninth rotational elements of the third planetary gear set are respectively a third sun gear, a third planet carrier, and a third ring gear of the third planetary gear set; and the tenth, the eleventh, and the twelfth rotational elements of the fourth planetary gear set are respectively a fourth sun gear, a fourth planet carrier, and a fourth ring gear of the fourth planetary gear set. ### Claim 5 (depends on 1) The planetary gear train of claim 1, wherein the first, the second, the third, and the fourth planetary gear sets are arranged in an order of the first, the second, the third, and the fourth, respectively, from an engine side. ### Claim 6 A planetary gear train of an automatic transmission for a vehicle, comprising: an input shaft configured to receive an engine torque; an output shaft configured to output a shifted torque; a first planetary gear set having a first, a second, and a third rotational elements; a second planetary gear set having a fourth, a fifth, and a sixth rotational elements; a third planetary gear set having a seventh, an eighth, and a ninth rotational elements; and a fourth planetary gear set having a tenth, an eleventh, and a twelfth rotational elements, wherein the input shaft is connected to the second rotational element, the output shaft is connected to the eleventh rotational element, the first rotational element is connected to the fourth rotational element, the third rotational element is connected to the seventh rotational element, the fifth rotational element is connected to the eighth rotational element and the twelfth rotational element, the tenth rotational element is selectively connected to the second, the third, and the ninth rotational elements respectively, and the eleventh rotational element is selectively connected to the ninth rotational element. ### Claim 7 (depends on 6) The planetary gear train of claim 6, wherein the first rotational element and the sixth rotational element are selectively connected to a transmission housing, respectively. ### Claim 8 (depends on 7) The planetary gear train of claim 7, further comprising: a first clutch selectively connecting the second rotational element and the tenth rotational element; a second clutch selectively connecting the third rotational element and the tenth rotational element; a third clutch selectively connecting the ninth rotational element and the eleventh rotational element; a fourth clutch selectively connecting the ninth rotational element and the tenth rotational element; a first brake selectively connecting the first rotational element and the transmission housing; and a second brake selectively connecting the sixth rotational element and the transmission housing. ### Claim 9 (depends on 6) The planetary gear train of claim 6, wherein: the first, the second, and the third rotational elements of the first planetary gear set are respectively a first sun gear, a first planet carrier, and a first ring gear of the first planetary gear set; the fourth, the fifth, and the sixth rotational elements of the second planetary gear set are respectively a second sun gear, a second planet carrier, and a second ring gear of the second planetary gear set; the seventh, the eighth, and the ninth rotational elements of the third planetary gear set are respectively a third sun gear, a third planet carrier, and a third ring gear of the third planetary gear set; and the tenth, the eleventh, and the twelfth rotational elements of the fourth planetary gear set are respectively a fourth sun gear, a fourth planet carrier, and a fourth ring gear of the fourth planetary gear set. ### Claim 10 (depends on 6) The planetary gear train of claim 6, wherein the first, the second, the third, and the fourth planetary gear sets are arranged in an order of the first, the second, the third, and the fourth, respectively, from an engine side.