Brake For Sun, Carrier And Orbit Patents (Class 475/280)
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Patent number: 7846058Abstract: A power train of an automatic transmission attains eight forward speeds and one reverse speed. The power train includes first, second, and third planetary gear sets, four clutches, and two brakes. The first planetary gear set generates a reduced rotational speed, the second planetary gear set generates a reverse rotational speed, and the third planetary gear set generates the eight forward speeds and the one reverse speed by using the reduced rotational speed, the reverse rotational speed, and a rotational speed of an input shaft.Type: GrantFiled: November 20, 2007Date of Patent: December 7, 2010Assignee: Hyundai Motor CompanyInventor: Woo Yeol Kim
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Patent number: 7841960Abstract: A multiple speed power transmission comprising: four epicyclic gearing assemblies each having first, second, and third rotating elements with specified interconnections, an input shaft connected to one of the rotating elements, an output shaft, two rotating clutches releasably connecting the input shaft to rotating elements, and four brakes selectively holding rotating elements against rotation. Clutches and brakes are applied in combinations of two to produce eight forward ratios and one reverse ratio.Type: GrantFiled: March 18, 2008Date of Patent: November 30, 2010Assignee: Ford Global TechnologiesInventor: Reid Alan Baldwin
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Patent number: 7828690Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide at least ten forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets, six torque-transmitting devices, and two fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The six torque-transmitting devices provide interconnections between various gear members and the transmission housing, and are operated in combinations of three to establish at least ten forward speed ratios and one reverse speed ratio.Type: GrantFiled: March 4, 2009Date of Patent: November 9, 2010Assignee: GM Global Technology Operations, Inc.Inventors: Scott H. Wittkopp, Andrew W. Phillips, James M. Hart, Clinton E. Carey
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Patent number: 7785227Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes three planetary gear sets, six torque-transmitting devices, one fixed interconnection and a grounded member. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The six torque-transmitting devices provide interconnections between various gear members, and the transmission housing, and are operated in combinations of three to establish eight forward speed ratios and one reverse speed ratio.Type: GrantFiled: July 19, 2007Date of Patent: August 31, 2010Assignee: GM Global Technology Operations, Inc.Inventors: Scott H. Wittkopp, Clinton E. Carey, James M. Hart, Andrew W. Phillips, Madhusudan Raghavan
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Patent number: 7771306Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide nine forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets, six torque-transmitting devices, and four fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The six torque-transmitting devices provide interconnections between various gear members, and the transmission housing, and are operated in combinations of three to establish nine forward speed ratios and one reverse speed ratio.Type: GrantFiled: July 11, 2007Date of Patent: August 10, 2010Assignee: GM GLobal Technology Operations, Inc.Inventors: Andrew W. Phillips, Scott H. Wittkopp, James M. Hart, Clinton E. Carey
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Patent number: 7749128Abstract: There is provided an automatic transmission comprising a first shaft capable of receiving torque from an engine, and four planetary gear sets arranged coaxially on the first shaft and in series in an axial direction of the first shaft. Each of the four planetary gear sets has a single sun gear and a single ring gear. Further, the automatic transmission comprises an output wheel arranged coaxially on the first shaft, and capable of outputting torque transmitted from the engine through some of the four planetary gear sets. The output wheel is arranged between two of the four planetary gear sets. Accordingly, the noise or vibration from the planetary gear sets in the automatic transmission may be reduced, while the overall length of the first shaft may be made shorter, and the overall size of the automatic transmission may be made smaller.Type: GrantFiled: November 1, 2006Date of Patent: July 6, 2010Assignee: Mazda Motor CorporationInventors: Shinya Kamada, Takamichi Teraoka, Junichi Doi, Tokimori Saka, Tatsuhiko Iwasaki, Naohiro Sakaue, Tatsutoshi Mizobe, Yoshihiko Fujita, Norio Iwashita, Satoshi Komori, Kazuhiko Ueda, Seiji Esaki
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Publication number: 20100160108Abstract: A gear train includes a first planetary gear set including a first sun gear, a first ring gear, and a first carrier and a second planetary gear set including a second sun gear, a second ring gear, and second carrier. The gear train also includes a first clutch configured to selectively connect the first carrier with the second carrier and a second clutch configured to selectively connect the first sun gear with the second sun gear. The gear train also includes a first brake configured to selectively fix the first sun gear, a second brake configured to selectively fix the second sun gear, and a third brake configured to selectively fix the first carrier.Type: ApplicationFiled: December 19, 2008Publication date: June 24, 2010Inventors: Baojun Si, Barry Mei, William H. Lane, James Stephen Rice
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Patent number: 7736261Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and at least one reverse speed ratio. The transmission includes four planetary gear sets having five torque-transmitting devices, three fixed interconnections and a grounded member. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The five torque-transmitting devices provide interconnections between various gear members, and with a stationary member, and are operated in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio.Type: GrantFiled: October 5, 2007Date of Patent: June 15, 2010Assignee: GM Global Technology Operations, Inc.Inventors: Scott H. Wittkopp, James M. Hart, Clinton E. Carey, Andrew W. Phillips
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Patent number: 7695394Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.Type: GrantFiled: July 27, 2007Date of Patent: April 13, 2010Assignee: GM Global Technology Operations, Inc.Inventors: Andrew W. Phillips, Scott H. Wittkopp, James M. Hart, Clinton E. Carey
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Patent number: 7686730Abstract: A multiple speed transmission includes an input and output; a first, second, third and fourth planetary gear sets, each gear set including a sun gear, a ring gear, a carrier, and pinions supported on the carrier and meshing with the sun gear and the ring gear; a first epicyclic gearing assembly including the first gear set, the second gear set, a first clutch, a first brake, a second brake, and first, second, third and fourth rotating members, said first clutch being operable to couple said first rotating member to the input, said first brake being operable to hold said fourth rotating member against rotation, and said second brake being operable to hold said second rotating member against rotation; and a second epicyclic gearing assembly including the third gear set, the fourth gear set, a second clutch, a third clutch, a third brake, and fifth, sixth, seventh and eighth rotating members, the third rotating member being secured to the eighth rotating member, said second control clutch being operable to couplType: GrantFiled: November 9, 2006Date of Patent: March 30, 2010Assignee: Ford Global Technologies, LLCInventor: Reid A. Baldwin
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Patent number: 7678011Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and at least one reverse speed ratio. The transmission includes four planetary gear sets having five torque-transmitting devices and five fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The five torque-transmitting devices provide interconnections between various gear members, and with a stationary member, and are operated in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio.Type: GrantFiled: October 5, 2007Date of Patent: March 16, 2010Assignee: GM Global Technology Operations, Inc.Inventors: James M. Hart, Andrew W. Phillips, Clinton E. Carey, Scott H. Wittkopp
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Patent number: 7614975Abstract: A gear train of an automatic transmission for a vehicle includes first and second shifting sections and a plurality of friction members, wherein: the first shifting section includes first and second simple planetary gear sets forming a first input path for directly receiving an input shaft rotation speed and an intermediate output path for outputting a reduced speed of the first shifting section; and the second shifting section includes third and fourth simple planetary gear sets forming a first intermediate input path for variably receiving an input shaft rotation speed, a second intermediate input path for receiving the reduced speed of the first shifting section through the intermediate output path and also for variably receiving an input shaft rotation speed, and a final output path for outputting a modified speed of the second shifting section.Type: GrantFiled: November 20, 2006Date of Patent: November 10, 2009Assignee: Hyundai Motor CompanyInventor: Kang Soo Seo
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Patent number: 7614973Abstract: An infinitely-variable transmission with double mode power transmission for a motor vehicle, provided with a combustion engine, including a first power transmission path with a composite epicyclic gear train connecting the combustion engine to the vehicle wheels, a second power transmission path with a simple epicyclic gear train, two electric motors providing a continuous speed variator, a second simple epicyclic gear train for mode change, and an engagement/disengagement unit that can block or release a mode-changing body in the second epicyclic gear train, according to the operating mode. The engagement/disengagement body includes a sliding sleeve with a dog tooth, which can be displaced by a hydraulic actuator and with two sets of dog teeth fixed to a mode-changing body in the second epicyclic gear train.Type: GrantFiled: May 23, 2005Date of Patent: November 10, 2009Assignee: Renault S.A.S.Inventors: Jean-Pierre Parthuisot, Robert Casenaz
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Patent number: 7611439Abstract: A power train of an automatic transmission realizing seven forward speeds and three reverse speeds includes an input shaft, an output gear, a transmission case, a speed reduction unit, an output unit, a first clutch, a second clutch, a third clutch, a fourth clutch, a first brake, and a second brake. The output unit includes variable input members and variably stopped members. the variable input members and variably stopped members are controlled by the clutches to realize seven forward speed and three reverse speeds at the output unit.Type: GrantFiled: November 20, 2006Date of Patent: November 3, 2009Assignee: Hyundai Motor CompanyInventor: Hyu Tae Shim
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Patent number: 7604563Abstract: A multi-speed transmission includes multiple planetary gear sets having members representable by a three-node lever and a five-node lever, with each node representing at least one of the members of the planetary gear sets. The transmission includes seven torque-transmitting mechanisms including three rotating clutches selectively connecting nodes of the three-node lever to nodes of the five-node lever, one rotating clutch selectively connecting the input member with a node of the five-node lever and three brakes grounding selective nodes of the five-node lever to a stationary member. The torque-transmitting mechanisms are engagable in different combinations to provide at least eight forward speed ratios and a reverse speed ratio between an input member and an output member, and there are preferably five alternate forward speed ratios such that there are five different combinations of nine forward speed ratios operable in progression with single-transition shifts between each forward speed ratio.Type: GrantFiled: May 21, 2007Date of Patent: October 20, 2009Assignee: GM Global Technology Operations, Inc.Inventor: Andrew W. Phillips
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Patent number: 7604564Abstract: A multi-speed transmission is provided that includes three planetary gear sets and seven torque-transmitting mechanisms with various fixed interconnections to provide seven forward speed ratios and one reverse speed ratio. The first planetary gear set is a dual sun planetary and the torque-transmitting mechanism engagement schedule is designed so that, in the reverse speed ratio, a predetermined speed ratio is achieved at the second sun gear member in the dual sun planetary and the input member, and, in the first forward speed ratio, the same magnitude predetermined speed ratio is achieved between the second sun gear member and the input member, but with the second sun gear member rotating in an opposite direction as in the reverse speed ratio.Type: GrantFiled: June 6, 2007Date of Patent: October 20, 2009Assignee: GM Global Technology Operations, Inc.Inventor: Donald Klemen
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Patent number: 7585247Abstract: A six-speed automatic transmission for a vehicle includes a transmission housing, an input member, an output member, three planetary gearsets for changing a ratio of torque between the input member and the output member, clutch assemblies to selectively couple the input member to predetermined members of the planetary gearsets, and brake assemblies to selectively couple predetermined members of the planetary gearsets to the transmission housing. The transmission achieves an improved gear ratio spacing and, correlatively, enhanced vehicle drivability, performance, and fuel economy, by respectively permanently coupling the planetary carrier of the first gearset with the sun gear of the second gearset, the annulus gears of the first and third gearsets with the planetary carrier of the second gearset, and the output member with both the annulus gear of the second gearset and the planetary carrier of the third gearset.Type: GrantFiled: September 11, 2006Date of Patent: September 8, 2009Assignee: Chrysler Group LLCInventors: Mark R. Foeller, Steven R. Fliearman, Dustin B. Skavang
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Patent number: 7582039Abstract: An automatic transmission is provided comprising a transmission case, a first shaft housed in and rotationally supported by said transmission case, and capable of receiving torque from an engine, a first shifting gear mechanism arranged coaxially with the first shaft, and a second shifting gear mechanism including a second planetary gear set. The second planetary gear set is housed within the transmission case and arranged coaxially with the first shaft, one of its sun and ring gears is capable of rotating together with the input shaft, and the other of the sun and ring gears is fixed to the transmission case. The automatic transmission further comprises first and second frictional elements arranged at least partly overlapped with the second planetary gear set in the axial direction between the planetary gear set and the transmission case in the radial direction.Type: GrantFiled: November 1, 2006Date of Patent: September 1, 2009Assignee: Mazda Motor CorporationInventors: Tatsuhiko Iwasaki, Takamichi Teraoka, Tokimori Saka, Naohiro Sakaue, Yoshihiko Fujita
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Patent number: 7575533Abstract: 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.Type: GrantFiled: February 9, 2007Date of Patent: August 18, 2009Assignee: ZF Friedrichshafen AGInventor: Gerhard Gumpoltsberger
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Patent number: 7575532Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets having seven torque-transmitting mechanisms, four fixed interconnections, and a stationary (grounded) member. The powertrain includes an engine and torque converter that is selectively connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members and with the transmission housing, and are operated in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio.Type: GrantFiled: February 6, 2007Date of Patent: August 18, 2009Assignee: GM Global Technology Operations, Inc.Inventors: Madhusudan Raghavan, Joel M Maguire
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Patent number: 7566288Abstract: A control apparatus for a vehicular drive system including a continuously-variable transmission portion operable as an electrically controlled continuously variable transmission having a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, and a second electric motor disposed in a power transmitting path between the power transmitting member and a drive wheel of a vehicle.Type: GrantFiled: May 26, 2006Date of Patent: July 28, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventors: Atsushi Tabata, Yuji Inoue, Atsushi Kamada
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Patent number: 7566284Abstract: A multi-speed transmission with forward and reverse gears having input and output shafts, planetary gearsets, rotatable shafts and control elements. The input shaft can be detachably connected to shaft (6) by clutch (16); clutch (13) to shaft (3), and clutch (14) to shaft (4). The shaft (6) is permanently connected to the sun gear of the second planetary gearset and the sun gear of the third planetary gearset. Shaft (3) is permanently connected to the carrier of the second planetary gearset and the ring gear of the third planetary gearset; coupled to the housing via brake (03). Shaft (4) is permanently connected to the sun gear of the first planetary gearset and can be coupled to the housing via the brake (04).Type: GrantFiled: February 9, 2007Date of Patent: July 28, 2009Assignee: ZF Friedrichshafen AGInventor: Gerhard Gumpoltsberger
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Patent number: 7549942Abstract: The multi-speed transmission with nine forward gears and one reverse gear comprises four planetary gear sets (P1, P2, P3, P4), seven rotatable shafts (1, 2, 3, 4, 5, 6, 7), as well as six control elements (03, 04, 05, 15, 17, 36), wherein the input shaft (1) is connected to the carrier of the planetary gear set (P1) and can be connected via a clutch (15) to the shaft (5), which is connected to the carrier of the third planetary gear set (P3) and can be coupled to the housing (G), wherein the sun gear of the planetary gear set (P1) is connected to the housing (G), the shaft (4) is connected to the ring gear of the planetary gear set (P3) and to the sun gear of the planetary gear set (P4) and can be coupled to the housing (G), wherein the shaft (3) is connected to the ring gear of the planetary gear set (P2) and to the carrier of the planetary gear set (P4) and can be coupled to the housing (G), and the shaft (6) is permanently connected to the ring gear of the planetary gear set (P1) and to the sun gear of theType: GrantFiled: February 9, 2007Date of Patent: June 23, 2009Assignee: ZF Friedrichshafen AGInventor: Gerhard Gumpoltsberger
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Patent number: 7544145Abstract: A power train of an automatic transmission has eight forward gear stages and three reverse gear stages. The power train includes two composite planetary gear sets and seven engagement elements: two clutches and five brakes. Two of the engagement elements are engaged in each gear stage.Type: GrantFiled: October 17, 2006Date of Patent: June 9, 2009Assignee: Hyundai Motor CompanyInventor: Wook Jin Jang
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Publication number: 20090124449Abstract: A gear train of an automatic transmission for a vehicle according to an exemplary embodiment of the present invention includes a first planetary gear set, a second planetary gear set composed of two simple planetary gear sets, three clutches, and two brakes, and thus the gear train of an automatic transmission may realize six forward speeds and one reverse speed.Type: ApplicationFiled: October 31, 2008Publication date: May 14, 2009Applicants: Hyundai Motor Company, Kai Motors CorporationInventors: Kang Soo SEO, Hyu Tae Shim
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Patent number: 7530917Abstract: A multi-speed transmission has three planetary gear sets and six torque-transmitting mechanism packaged in various ones of five zones within a transmission cavity. Each planetary gear set has a ring gear member, a sun gear member and a carrier member that rotatably supports a plurality of pinion gears that intermesh with both the sun gear member and the ring gear member. Certain members are continuously connected for common rotation. Specifically, an interconnecting member continuously interconnects for common rotation the carrier member of the first planetary gear set, the sun gear member of the second planetary gear set and the ring gear member of the third planetary gear set. Additionally, the sun gear member of the first planetary gear set is grounded to the transmission casing via a radially-extending structural member.Type: GrantFiled: October 30, 2007Date of Patent: May 12, 2009Assignee: GM Global Technology Operations, Inc.Inventors: Scott H. Wittkopp, James M. Hart
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Patent number: 7503870Abstract: A control apparatus for a vehicular drive system including a continuously-variable transmission portion, and a step-variable transmission portion, the continuously variable transmission portion having a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, and a second electric motor disposed in a power transmitting path between the power transmitting member and a drive wheel of a vehicle, the step-variable transmission portion constituting a part of the power transmitting path, the control apparatus includes a differential-state limiting device provided in the differential mechanism for limiting an operation of the continuously-variable transmission portion, and an electric-motor control device to control a drive-force assisting operation to drive the vehicle during a shifting action of the step-variable transmission portion, differently depending upon whether the continuously-variable transmission portion is placed in a continuously-vType: GrantFiled: May 26, 2006Date of Patent: March 17, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventors: Atsushi Tabata, Yuji Inoue, Atsushi Kamada
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Publication number: 20090048061Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets, five torque-transmitting devices, three fixed interconnections and a grounded member. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The five torque-transmitting devices provide interconnections between various gear members, and the transmission housing, and are operated in combinations of two to establish eight forward speed ratios and one reverse speed ratio.Type: ApplicationFiled: August 17, 2007Publication date: February 19, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: James M. Hart, Andrew W. Phillips, Clinton E. Carey, Scott H. Wittkopp
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Patent number: 7481731Abstract: The electrically variable transmission (EVT) family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, three electric machines serving interchangeably as motors or generators and at least one brake. The three motor/generators are operable in a coordinated fashion to yield an EVT with a continuously variable range of speeds (including reverse). One of the brakes enables series hybrid operation.Type: GrantFiled: November 17, 2006Date of Patent: January 27, 2009Assignee: GM Global Technology Operations, Inc.Inventor: Patrick B. Usoro
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Patent number: 7479080Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, three electric machines serving interchangeably as motors or generators and up to three brakes. The three motor/generators are operable in a coordinated fashion to yield an EVT with a continuously variable range of speeds (including reverse). One of the brakes enables series hybrid operation.Type: GrantFiled: July 24, 2006Date of Patent: January 20, 2009Assignee: GM Global Technology Operations, Inc.Inventor: Patrick B. Usoro
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Publication number: 20080312026Abstract: A power train of an automatic transmission attains eight forward speeds and one reverse speed. The power train includes first, second, and third planetary gear sets, four clutches, and two brakes. The first planetary gear set generates a reduced rotational speed, the second planetary gear set generates a reverse rotational speed, and the third planetary gear set generates the eight forward speeds and the one reverse speed by using the reduced rotational speed, the reverse rotational speed, and a rotational speed of an input shaft.Type: ApplicationFiled: November 20, 2007Publication date: December 18, 2008Inventor: Woo Yeol Kim
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Patent number: 7455614Abstract: A power train of an automatic transmission that realizes seven forward speeds and two reverse speeds includes a first planetary gear set a second planetary gear set; a third planetary gear set an input shaft; an output gear; and a transmission case. A third planet carrier is fixedly connected to a first ring gear, a second ring gear is fixedly connected to the a planet carrier, a long-pinion-side ring gear acts as an input element by being fixedly connected to the input shaft, and a second planet carrier acts as an output element by being fixedly connected to the output gear. Also, a second ring gear is variably connected to the input shaft via a first clutch, a first sun gear is variably connected to the first planet carrier via a second clutch, the second sun gear is variably connected to the first sun gear via a third clutch, and the short-pinion-side ring gear is variably connected to the transmission case via a first brake.Type: GrantFiled: October 31, 2006Date of Patent: November 25, 2008Assignee: Hyundai Motor CompanyInventors: Kang Soo Seo, Hyu Tae Shim
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Publication number: 20080269003Abstract: An automatic transmission having input and output drive shafts (AN, AB), a planetary gearset (VS), a main planetary gearset (HS), with three uncoupled input elements and one output element, and shift elements (A, B, C, D, E, F). An input element of gearset (VS) couples with shaft (AN). An output element of gearset (VS) rotates slower than shaft (AN). An element of gearset (VS) is fixed to a transmission housing. The first input element of gearset (HS) is connected, via elements (B, C), to the output element of gearset (VS). The first input element of gearset (HS) is connectable, via element (F), with shaft (AN). The second input element of gearset (HS) is connectable, via element (A), with the output element of gearset (VS). The third input element of gearset (HS) is connectable, via elements (D, E), with shaft (AN). The output element of the gearset (HS) couples shaft (AB).Type: ApplicationFiled: August 8, 2005Publication date: October 30, 2008Applicant: ZF FRIEDRICHSHAFEN AGInventors: Gert Bauknecht, Peter Ziemer, Armin Gierling
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Publication number: 20080261766Abstract: A structure is given where the automatic transmission includes a planetary gear unit, a plurality of engagement elements to disconnect or fix elements of the planetary gear unit, a variable speed control that selects a low-speed forward gear as the vehicle first starts to move, a high-speed forward gear when the vehicle is moving forward, and a reverse gear when the vehicle is moving reverse by disconnecting or fixing the plurality of engagement elements. Embodiments may provide an advantage in layout by reducing a high-torque starting element and a forward/reverse shift element into a single planetary gear unit.Type: ApplicationFiled: November 1, 2005Publication date: October 23, 2008Applicant: Nissan Motor Co., Ltd.Inventors: Takao Koyama, Yukio Nagahori, Katsuya Tanoue, Yousuke Hori, Yusuke Miyamoto
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Patent number: 7438662Abstract: A six-speed power train of an automatic transmission for a vehicle includes: a first, double pinion planetary gear set including a first operational element always operating as an input element, a second operational element selectively operating as an output and a fixed element, and a third operational element selectively operating as an input element, an output element, and a fixed element; a second, Ravingneaux type planetary gear set including a first operational element selectively operating as an input element, a second operational element always operating as an output element, a third operational element selectively operating as an input element and a fixed element, and a fourth operational element selectively operating as a fixed element; a plurality of clutches disposed between and variably connecting operational elements of the first and second planetary gear sets; and a plurality of brakes variably connecting a transmission housing with one of the fixed elements.Type: GrantFiled: November 8, 2006Date of Patent: October 21, 2008Assignee: Hyundai Motor CompanyInventors: Hoon Chang, Wook Jin Jang
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Patent number: 7422535Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, four or five selectable torque-transmitting devices, and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and at least one mechanically fixed forward speed ratio. The torque transmitting devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.Type: GrantFiled: March 17, 2006Date of Patent: September 9, 2008Assignee: GM Global Technology Operations, Inc.Inventors: Madhusudan Raghavan, Norman K. Bucknor
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Patent number: 7387585Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to five selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.Type: GrantFiled: March 17, 2006Date of Patent: June 17, 2008Assignee: GM Global Technology Operations, Inc.Inventors: Norman K. Bucknor, Madhusudan Raghavan
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Publication number: 20080103015Abstract: A gear train of an automatic transmission for a vehicle includes first and second shifting sections and a plurality of friction members, wherein: the first shifting section includes first and second simple planetary gear sets forming a first input path for directly receiving an input shaft rotation speed and an intermediate output path for outputting a reduced speed of the first shifting section; and the second shifting section includes third and fourth simple planetary gear sets forming a first intermediate input path for variably receiving an input shaft rotation speed, a second intermediate input path for receiving the reduced speed of the first shifting section through the intermediate output path and also for variably receiving an input shaft rotation speed, and a final output path for outputting a modified speed of the second shifting section.Type: ApplicationFiled: November 20, 2006Publication date: May 1, 2008Inventor: Kang Soo Seo
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Patent number: 7364527Abstract: A multi-speed transmission that achieves nine forward speed ratios and a reverse speed ratio has two planetary gear sets and a plurality of intermeshing gear members which may consist of two additional planetary gear sets or gear members arranged in a countershaft design. A speed ratio of an equal value but with an opposite direction of rotation is achieved at one of the gear members connected with one of the planetary gear members in a reverse ratio as in a first forward speed ratio. Six torque-transmitting mechanisms are employed.Type: GrantFiled: September 23, 2005Date of Patent: April 29, 2008Assignee: General Motors CorporationInventor: Donald Klemen
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Publication number: 20080064557Abstract: A six-speed automatic transmission for a vehicle includes a transmission housing, an input member, an output member, three planetary gearsets for changing a ratio of torque between the input member and the output member, clutch assemblies to selectively couple the input member to predetermined members of the planetary gearsets, and brake assemblies to selectively couple predetermined members of the planetary gearsets to the transmission housing. The transmission achieves an improved gear ratio spacing and, correlatively, enhanced vehicle drivability, performance, and fuel economy, by respectively permanently coupling the planetary carrier of the first gearset with the sun gear of the second gearset, the annulus gears of the first and third gearsets with the planetary carrier of the second gearset, and the output member with both the annulus gear of the second gearset and the planetary carrier of the third gearset.Type: ApplicationFiled: September 11, 2006Publication date: March 13, 2008Inventors: Mark R. Foeller, Steven R. Fliearman, Dustin B. Skavang
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Publication number: 20080039266Abstract: A power train of an automatic transmission realizing seven forward speeds and three reverse speeds includes an input shaft, a transmission case, a speed reduction unit including an output unit, a first clutch, a second clutch, a second brake, a third brake, and a fourth brake. The output unit generates seven forward speeds and three reverse speeds at the shift speed output member by operations of the first and second variable input members and third and fourth variably stopped members in response to operation of the clutches and brakes.Type: ApplicationFiled: November 20, 2006Publication date: February 14, 2008Inventor: Hyu Tae Shim
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Publication number: 20080039267Abstract: A power train of an automatic transmission realizing seven forward speeds and three reverse speeds includes an input shaft, an output gear, a transmission case, a speed reduction unit, an output unit, a first clutch, a second clutch, a third clutch, a fourth clutch, a first brake, and a second brake. The output unit includes variable input members and variably stopped members. the variable input members and variably stopped members are controlled by the clutches to realize seven forward speed and three reverse speeds at the output unit.Type: ApplicationFiled: November 20, 2006Publication date: February 14, 2008Inventor: Hyu Tae Shim
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Publication number: 20080009383Abstract: A power train of an automatic transmission that realizes seven forward speeds and two reverse speeds includes a first planetary gear set a second planetary gear set; a third planetary gear set an input shaft; an output gear; and a transmission case. A third planet carrier is fixedly connected to a first ring gear, a second ring gear is fixedly connected to the a planet carrier, a long-pinion-side ring gear acts as an input element by being fixedly connected to the input shaft, and a second planet carrier acts as an output element by being fixedly connected to the output gear. Also, a second ring gear is variably connected to the input shaft via a first clutch, a first sun gear is variably connected to the first planet carrier via a second clutch, the second sun gear is variably connected to the first sun gear via a third clutch, and the short-pinion-side ring gear is variably connected to the transmission case via a first brake.Type: ApplicationFiled: October 31, 2006Publication date: January 10, 2008Inventors: Kang Soo Seo, Hyu Tae Shim
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Patent number: 7303500Abstract: A multiple speed transmission having an input and output includes a first and second planetary gearsets, each gearset including a sun gear, a ring gear surrounding the sun gear, a set of planet pinions meshing with the sun gear and the ring gear, and a carrier on which the planet pinions are rotatably supported, the carrier of the first gearset being driveably connected to the ring gear of the second gearset. A third gearset, driveably connected to the carrier of the second gearset and the ring gear of the first gearset, alternately drives the output at a predetermined lower speed relative to a speed of the carrier of the second gearset, and driving the output at substantially the speed of the ring gear of the first gearset. A first clutch connects and disconnects the input and the sun gear of the first gearset. A second clutch connects and disconnects the input and the sun gear of the second gearset. A third clutch alternately connects and disconnects the input and the carrier of the first gearset.Type: GrantFiled: December 16, 2005Date of Patent: December 4, 2007Assignee: Ford Global Technologies, LLCInventor: Reid Baldwin
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Patent number: 7297085Abstract: An automatic transmission providing modal speed ratios, single transition gear shifting, low internal speeds, and an output lock feature is provided. First, second and third modal torque-transmitting mechanisms are selectively engagable along with first and second input torque-transmitting mechanisms to effect power flow to first and second planetary gear set to cause the speed of a member of one of the gear sets to increase in the first mode (when the first and second input torque-transmitting mechanisms are engaged in successive order while the first modal torque-transmitting mechanism is engaged), decrease in the second mode (when the first and second input torque-transmitting mechanisms are engaged in reverse order while the second modal torque-transmitting mechanism is engaged) and increase in the third mode (when the first and second input torque-transmitting mechanisms are engaged in successive order while the third modal torque-transmitting mechanism is engaged).Type: GrantFiled: October 27, 2005Date of Patent: November 20, 2007Assignee: General Motors CorporationInventor: Donald Klemen
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Patent number: 7294087Abstract: An automatic transmission including a mechanical reduction gear connected to an input shaft that generates a decelerated rotation smaller than a rotation of the input shaft from a decelerated rotating member and a compound planetary gear for shifting with a first element, a second element, a third element, a fourth element, and a fifth element.Type: GrantFiled: August 2, 2004Date of Patent: November 13, 2007Assignee: Aisin AW Co., Ltd.Inventors: Masahiro Hayabuchi, Masaaki Nishida, Satoru Kasuya, Toshihiko Aoki
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Patent number: 7291085Abstract: Durability and power transmission efficiency are enhanced in a six-speed powertrain of an automatic transmission by a scheme that includes: a first planetary gear set having operational elements of a first sun gear, a first ring gear, and a first carrier; a second planetary gear set having operational elements of a second sun gear, a second ring gear, and a second carrier; a third planetary gear set having operational elements of a third sun gear, a third ring gear, and a third carrier; an input shaft; at least one output gear; and a transmission case. The first sun gear is fixedly connected to the second sun gear. The second carrier is fixedly connected to the third ring gear. The third sun gear always acts as an input element by being fixedly connected to the input shaft. At lease one operational element of the third carrier and the first ring gear always acts as an output element by being fixedly connected to the at least one output gear.Type: GrantFiled: September 1, 2005Date of Patent: November 6, 2007Assignee: Hyundai Motor CompanyInventor: Jong Sool Park
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Patent number: 7276011Abstract: An automatic transmission having first and second groups of successive forward-drive positions for outputting a rotary motion a speed of which is higher than the speed of a rotary motion received from an input member, the first group being established by an engaging action of a first input clutch while the second group being established by an engaging action of a second input clutch, or first and second groups of successive forward-drive positions for reducing the speed of the rotary motion received from the input member, the first and second groups being established by an engaging action of a first and second input clutches respectively. The successive operating positions of the first group have respective speed ratios different from those of the second group. The automatic transmission is shiftable to a selected one of the successive operating positions of a selected one of the first and second groups.Type: GrantFiled: July 19, 2004Date of Patent: October 2, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Atsushi Tabata, Akira Hoshino, Terufumi Miyazaki, Atsushi Honda, Akiharu Abe, Hirofumi Ota
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Publication number: 20070225109Abstract: A power train of an automatic transmission has eight forward gear stages and three reverse gear stages. The power train includes two composite planetary gear sets and seven engagement elements: two clutches and five brakes. Two of the engagement elements are engaged in each gear stage.Type: ApplicationFiled: October 17, 2006Publication date: September 27, 2007Inventor: Wook Jin Jang
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Publication number: 20070161453Abstract: An automatic transmission is provided comprising a transmission case, a first shaft housed in and rotationally supported by said transmission case, and capable of receiving torque from an engine, a first shifting gear mechanism arranged coaxially with the first shaft, and a second shifting gear mechanism including a second planetary gear set. The second planetary gear set is housed within the transmission case and arranged coaxially with the first shaft, one of its sun and ring gears is capable of rotating together with the input shaft, and the other of the sun and ring gears is fixed to the transmission case. The automatic transmission further comprises first and second frictional elements arranged at least partly overlapped with the second planetary gear set in the axial direction between the planetary gear set and the transmission case in the radial direction.Type: ApplicationFiled: November 1, 2006Publication date: July 12, 2007Applicant: Mazda Motor CorporationInventors: Tatsuhiko Iwasaki, Takamichi Teraoka, Tokimori Saka, Naohiro Sakaue, Yoshihiko Fujita