Plurality Of Counter Shafts Patents (Class 74/331)
  • Patent number: 8973454
    Abstract: A power transmitting apparatus with improved power transmitting efficiency and reduced lag time for shifting speeds can comprise a starting clutch mechanism configured to selectively transmit and cut off driving power of engine to wheels of a vehicle, a plurality of gear-stage clutch devices operatively positioned to transmit power between the starting clutch mechanism and the wheels, an input and an output of the plurality of gear-stage clutch devices configured at predetermined gear ratios, and a gear-stage selecting device configured to select any one of the gear-stage clutch devices in accordance with a vehicle operating condition and selectively set a gear ratio for power transmission from the engine to the wheels. The gear-stage clutch devices can comprise alternately arranged driving clutch discs and driven clutch discs, and hydraulic pistons.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: March 10, 2015
    Assignee: Kabushiki Kaisha F.C.C.
    Inventors: Shouji Asatsuke, Akio Oishi, Tatsuyuki Ohashi, Jun Ishimura, Keiichi Ishikawa
  • Patent number: 8967008
    Abstract: A transmission includes a housing, an input member connectable to an engine output member, a sleeve member, and a launch clutch assembly connected to the input member and to the sleeve member, wherein the launch clutch is selectively engageable to transmit torque from the input member to the sleeve member. A first countershaft is rotatably supported within the transmission housing. A second countershaft is rotatably supported within the transmission housing. A plurality of co-planar gear sets are connected to the input member, sleeve member, and the countershafts. A plurality of torque transmitting mechanisms are provided for coupling various components of the co-planar gear sets to the input member, sleeve member, and countershafts. The selective engagement of the launch clutch assembly and the torque transmitting mechanisms establishes at least one of five forward speed ratios and a reverse speed ratio.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: March 3, 2015
    Assignee: GM Global Technology Operations, LLC
    Inventors: Bret M. Olson, Edward W. Mellet
  • Patent number: 8967009
    Abstract: A transmission includes a housing, an input member connectable to an engine output member, and a launch clutch assembly connected to the input member. A first and a second countershaft are rotatably supported within the transmission housing. A plurality of co-planar gear sets are connected to the input member and the first and second countershafts. A plurality of torque transmitting mechanisms are provided for coupling various components of the co-planar gear sets to the input member and countershafts. The selective engagement of the launch clutch assembly and the torque transmitting mechanisms establishes at least one of six forward speed ratios and a reverse speed ratio.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: March 3, 2015
    Assignee: GM Global Technology Operations, LLC
    Inventors: Edward W. Mellet, Bret M. Olson
  • Patent number: 8960033
    Abstract: A hybrid drive of a motor vehicle having an automated manual transmission with two coaxial input shafts and a common output shaft. The input shafts are respectively driven by an engine and an electric machine and can couple the output shaft via respective groups of gearwheel sets. Each gearwheel set comprises a gear fixed to the associated input shaft and an idler gear supported by respective countershafts. At least two idler gears disposed on one of the two countershafts of two gearwheel sets, within the transmission, assigned to two different input shafts, can be coupled via a winding-path shift element, and the two output constants are disposed in a common radial plane by using a common output gear disposed on the output shaft.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: February 24, 2015
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Matthias Reisch
  • Patent number: 8943918
    Abstract: A power unit for a vehicle includes a buffering device provided on a final shaft parallel to a countershaft of a speed change gear. The buffering device includes a damper gear wheel supported for relative rotation on the final shaft, a lifter coupled against relative rotation but for relative movement in an axial direction on the final shaft and engaged by a cam provided on one face of the damper gear wheel, a spring retainer supported at a position on the final shaft spaced apart from the lifter, and a coil spring provided between the lifter and the spring retainer for biasing the lifter toward the damper gear wheel. The buffering device is disposed on the final shaft and positioned between a pair of imaginary planes, the pair of imaginary planes extending perpendicularly to an axial line of the idle shaft and passing opposite ends of the idle shaft.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: February 3, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventor: Hiroshi Sotani
  • Patent number: 8936529
    Abstract: A transmission ratio step of a stepped transmission which can couple at least two parallel transmission shafts. Multiple transmission ratios can be implemented with the ratio steps. A planetary gear set, comprising three components, is located coaxial with a first shaft. A first component is connected to and driven by an input supplied along the first axis, and a second component meshes with at least one spur gear, each of which is placed on a further axis that is parallel to the first axis. A first transmission ratio can be engaged by fixing a third component of the planetary gear set, and a second transmission ratio can be implemented by connecting either the third or the second transmission component to the drive supplied along the first axis. At least one the transmission ratio steps is utilized in a stepped transmission of a motor vehicle transmission.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: January 20, 2015
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Eckhardt Luebke
  • Patent number: 8919216
    Abstract: A double clutch transmission of a motor vehicle with a first input shaft (W1) formed as a hollow shaft and a longer, second input shaft (W2) arranged coaxially inside the first input shaft (W1). Each of input shaft is in driving connection, by way of an associated input constant (EK1, EK2), with at least one countershaft (W3a, W3b) arranged axis-parallel to the first and the second input shafts (W1, W2). To avoid jamming of the gearteeth (4, 5a, 5b; 6, 7a, 7b) of the respective, non-load-transmitting input constant (EK1, EK2), the fixed wheel (6), arranged on the associated input shaft (W2) in at least one of the input constants, is arranged in a rotationally fixed manner by first carrier gearteeth (19) on a support sleeve (20) which, in turn, is connected in a rotationally fixed manner by second carrier gearteeth (21, 21?) to the input shaft (W2) concerned.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: December 30, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Bernard Hunold, Eckhardt Lubke, Stefan Renner
  • Patent number: 8899122
    Abstract: A transmission system has a clutch module which has a single input and two outputs, where clutch devices are located between the outputs and the input. The transmission system further includes a transmission module which has two inputs and a single output, the transmission module comprising at least two sub-transmissions where at least a single speed transforming gear or a single transmission clutch is located between an input and an output of each sub-transmission. The two outputs of the clutch module are connected here to both inputs of the transmission module.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: December 2, 2014
    Assignee: DTI Group, B.V.
    Inventors: Roell Marie Van Druten, Alexander Franciscus Anita Serrarens, Bas Gerard Vroemen
  • Patent number: 8887589
    Abstract: A twin clutch transmission for a large horsepower vehicle having a compact size and a high transmission efficiency is obtained. In a twin clutch transmission, there are provided an input shaft, an odd-numbered level speed change mechanism 30, an even-numbered level speed change mechanism 60, a synchronizing speed change mechanism 100, and an output mechanism 90. The speed change mechanisms 30 and 60 include transmission gear trains 32 and 62, main clutches 34 and 64 for selectively transmitting the powers of the transmission gear trains 32 and 62 to the transmission shafts 40 and 70. The synchronizing speed change mechanism 100 includes synchronizing gear trains 110 and 120 for coupling the rotation of the odd-numbered level transmission shaft 32 with the rotation of the even-numbered level transmission shaft 62, and synchronizing clutches 112 and 122 for selecting coupling by this synchronizing gear train.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: November 18, 2014
    Assignee: Hitachi Nico Transmission, Co., Ltd.
    Inventors: Masahiko Ibamoto, Hideki Nakamura, Daisuke Hagihara
  • Publication number: 20140326093
    Abstract: A transmission system including a first input shaft (1) that is arranged to receive drive directly from a drive source (80), and a second input shaft (3) that is arranged to receive drive from the drive source via a drive interruption means (86), such as a friction clutch device, a first gear element (15) rotatable relative to the first input shaft (1) and a selector assembly (29) for selectively locking the first gear element (15) for rotation with the first input shaft (1) from operational modes that include the following modes: lock the gear element for rotation with the first input shaft in forward and reverse torque directions, lock the gear element for rotation with the first input shaft in the forward torque direction and not lock in the reverse torque direction; and lock the gear element with rotation with the first input shaft in the reverse torque direction and not lock in the forward torque direction. A method of performing a power on down shift is also provided.
    Type: Application
    Filed: May 25, 2012
    Publication date: November 6, 2014
    Applicant: ZEROSHIFT TRANSMISSIONS LIMITED
    Inventors: William Wesley Martin, Richard Neil Quinn
  • Patent number: 8869653
    Abstract: Provided is a drive apparatus of a hybrid vehicle, configured in such a manner that the occurrence of a resonance phenomenon is minimized and that the efficiency of utilization of the space occupied by a torque limiter mechanism is improved. A drive apparatus for a hybrid vehicle is configured in such a manner that a torque limiter is provided in the path of power transmission between an inner shaft and a generator at a position between the generator and a motor. The torque limiter axially overlaps with at least a part of the stator of the generator and/or at least a part of the stator of the motor.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: October 28, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuhiro Fujita, Toru Takahashi, Tatsuya Noda
  • Publication number: 20140311266
    Abstract: There is provided a control device for a transmission for shifting a driving force of an engine. The transmission includes at least two input shafts configured to be driven by the driving force of the engine, intermediate shafts provided correspondingly to the at least two input shafts and configured such that driving forces of the input shafts are respectively transmitted thereto, and a clutch provided between the input shafts and the intermediate shafts and configured to transmit the driving forces from the input shafts to the intermediate shafts. A non-use shaft detection section is configured to detect a non-use state of the intermediate shafts based on a transmission state of the clutch.
    Type: Application
    Filed: April 17, 2014
    Publication date: October 23, 2014
    Applicant: SUZUKI MOTOR CORPORATION
    Inventors: Hideyuki NAKASHIMA, Hiroshi KAMATSUKE
  • Publication number: 20140305239
    Abstract: A transmission having two clutches connected between a drive and respective transmission input shafts, one being hollow which supports the other within. A hollow countershaft which supports another countershaft therein. A main shaft arranged coaxially between the inner input shaft and an output shaft. Shifting elements can engage a variety of transmission connections in which transmission elements of the main group couple transmission elements of the range group which can couple the output shaft. The hollow countershaft has three fixed wheels which engage respective loose wheels, and the countershafts are rigidly coupled by a shifting element. With respect to this shifting element: an adjacent loose wheel rotates on and can rigidly couple the main shaft; a remote loose wheel rotates on and can rigidly couple the inner input shaft; and a central loose wheel rotates on and can rigidly couple at least one of the inner input and main shafts.
    Type: Application
    Filed: November 15, 2012
    Publication date: October 16, 2014
    Inventors: Eckhardt Lubke, Johannes Kaltenbach, Bernard Hunold
  • Patent number: 8857285
    Abstract: A saddle type vehicle having mounted thereon a power unit is provided with a twin clutch type transmission including a pair of main shafts and a pair of clutches along different axes, to enable a compact layout of axes and a reduction in size of the unit and its surroundings. The axis center (first main axis) of a first main shaft is disposed rearwardly of the axis center (crank axis) of a crankshaft and forwardly of the axis center (counter axis) of a counter shaft, whereas the axis center (second main axis) of a second main shaft is disposed rearwardly of the axis center (counter axis) of the counter shaft and forwardly of the axis center (pivot axis) of a pivot shaft.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: October 14, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasushi Fujimoto, Kinya Mizuno, Yoshiaki Tsukada, Takashi Ozeki, Kazuhiko Nakamura, Mitsuo Nakagawa
  • Patent number: 8857284
    Abstract: A multi clutch transmission includes a first clutch plate mounted on a first input shaft, a second clutch plate mounted on a second input shaft arranged concentrically around the first input shaft, a third clutch plate mounted on a third input shaft arranged concentrically around the second input shaft, and a clutch housing comprising a plurality of reaction plates, the first, second, and third clutch plates being individually and selectively engageable and disengageable with reaction plates in the clutch housing. A multi clutch transmission can also include at least three countershafts arranged around the input shafts.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: October 14, 2014
    Assignee: Mack Trucks, Inc.
    Inventor: Michael E. Kahl
  • Patent number: 8850915
    Abstract: To achieve downsizing of a power unit and the vicinity thereof by permitting compact axial arrangement in a straddle-ride type vehicle on which the power unit having a twin-clutch type transmission is mounted. The transmission has a pair of main shafts with respective different axes and corresponding clutches. One of respective axial centers of the main shafts is disposed on one (above) of the sides with respect to a line and the other is disposed on the other side (below), the line connecting an axial center of the counter shaft with an axial center of a pivot shaft, as viewed in side elevation from the axial direction of the main shafts and counter shaft.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: October 7, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasushi Fujimoto, Kinya Mizuno, Yoshiaki Tsukada, Takashi Ozeki, Kazuhiko Nakamura, Mitsuo Nakagawa
  • Patent number: 8833191
    Abstract: In a control apparatus for an automatic transmission having multiple speeds constituted by four sets and speed selecting mechanisms corresponding to the four sets, assuming the speeds as seven among eight speeds of A to H in order of gear ratio, the four sets are constituted by a first set of A having a largest gear ratio and C that is next but one; a second set including at least H having a smallest gear ratio; a third set of B and D between two of the first set; and a fourth set including two of E, F and G between the second and third sets, and one of first and second pressure regulators selectively supplies hydraulic pressure to two of the mechanisms corresponding to the first and second sets, while the other thereof selectively supplies hydraulic pressure to two of the mechanisms corresponding to the third and fourth sets.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: September 16, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Noriyuki Yagi, Yasushi Inagawa, Shirou Godai, Hirotake Omoto
  • Publication number: 20140251046
    Abstract: A vehicle transmission includes first, second, third and fourth meshing gear-pinion pairs. The transmission produces a first speed ratio through a power path that includes first and second input shafts, a gear coupler and the first, second and third gear-pinion pairs. The transmission also produces a second speed ratio through a power path that includes the second input shaft, the gear coupler and the second, third and fourth gear-pinion pairs.
    Type: Application
    Filed: May 22, 2014
    Publication date: September 11, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventor: Steven G. Thomas
  • Patent number: 8827858
    Abstract: A multi-speed countershaft transmission for a vehicle is provided. The transmission includes a main shaft and countershaft gears that receive input directly from an input member. A plurality of torque transmitting mechanisms may be selectively applied to synchronize a range gear to a countershaft. The countershaft transfers torque to an output gear set, which may transfer torque to a planetary gear set. The available range gears include a plurality of forward speed ratios and at least one reverse speed ratio. One or more power take-off sections may also be provided. One or more other torque transmitting mechanisms may be selectively applied to bypass the countershaft and/or to couple the planet carrier of the planetary gear set to another component of the planetary gear set.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: September 9, 2014
    Assignee: Allison Transmission, Inc.
    Inventor: Dane L. Rodgers, II
  • Patent number: 8826758
    Abstract: A transmission includes an input member, an output member, first and second transmission input shafts, first and second countershafts, a plurality of co-planar gear sets and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and six forward speed ratios between the input member and the output member.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: September 9, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventors: Scott H. Wittkopp, Craig S. Ross
  • Patent number: 8794090
    Abstract: In a vehicle power unit including a twin clutch type transmission that includes a pair of main shafts and clutches mounted on mutually different shafts, to enable compact shaft arrangements and to achieve a reduction in the size of the unit and the surrounding areas. Axial centers of a shift drum and a countershaft are disposed across a line that connects axial centers of main shafts in a side view as viewed from a direction of an axis of each of the main shafts and the countershaft.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: August 5, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kinya Mizuno, Yoshiaki Tsukada, Takashi Ozeki, Kazuhiko Nakamura, Mitsuo Nakagawa, Yasushi Fujimoto
  • Patent number: 8794091
    Abstract: In a twin clutch transmission, a first main shaft transfers rotation power of a crankshaft that is provided in parallel, input via a first clutch, to a drive shaft via an odd-numbered transmission gear mechanism. A second main shaft transfers rotation power of the crankshaft that is provided in parallel, input via a second clutch, to the drive shaft via an even-numbered transmission gear mechanism. In a first power transfer path running from the crankshaft to the drive shaft via the first clutch and a second power transfer path running from the crankshaft to the drive shaft via the second clutch, back torque limiters are provided that, when reverse torque operates in a direction opposite the direction for acceleration of a rear wheel, limits transfer of the reverse torque.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: August 5, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Tetsushi Saitoh
  • Patent number: 8789433
    Abstract: A transmission capable of triple overdrive includes a main box section connected to a first input shaft. The main box section comprises clutch collars which are connected to the main shaft and axially movable by an operator to selectively couple one main shaft gear to a main shaft via a countershaft gear fixed on a countershaft. An auxiliary section is connected to the main box section and contains a splitter section and a range section. An output shaft is connected to the auxiliary section The transmission is selectively configured Io operate in a plurality of gear combinations. At least three of the gear combinations are configured for overdrive. The main box section is connected directly to the splitter section.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: July 29, 2014
    Assignee: Mack Trucks, Inc.
    Inventors: John Jerwick, Michael E. Kahl
  • Publication number: 20140202272
    Abstract: A multi-clutch transmission for a motor vehicle with a prime mover has a main transmission, a range section and an output shaft, the main transmission including one input shaft, a main shaft and a main countershaft, the main shaft being rotationally fixed with a range input shaft of the range section, the range section including a range main shaft that is rotationally fixed with the output shaft, a range countershaft, range gearwheels that can selectively transfer power from the range input member to the range countershaft and on to the range main shaft, and range clutches, the multi-clutch transmission including a by-passing torque path in which power can be transferred when the range section is shifted, and where the by-passing torque path includes a by-passing clutch that selectively can rotationally lock the main countershaft to the range countershaft.
    Type: Application
    Filed: August 30, 2011
    Publication date: July 24, 2014
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Anders Hedman, Daniel Stålberg
  • Publication number: 20140196556
    Abstract: A parallel shift transmission which comprises split and range groups, each of which is divided into two parallel transmission branches. One branch can be actuated by a load shift element to transfer rotation of a drive shaft, via a transmission ratio of the split group, and then to a countershaft of the associated branch. Subsequently rotation can be converted, via a range ratio of the range group, into rotation of an output drive shaft. The gear stages are alternately divided between the branches in the order of associated transmission ratios, while each of the range ratios is achieved by shifting one of the group stages of the range group. To drive a power take-off via the transmission, the load shift elements are individual clutches, each of which is arranged in the associated branch between an output-side counter shaft of the split group and a drive-side counter shaft of the range group.
    Type: Application
    Filed: March 20, 2012
    Publication date: July 17, 2014
    Applicant: ZF Friedrichshafen AG
    Inventors: Stefan Beck, Martin Fellmann, Matthias Reisch
  • Patent number: 8777789
    Abstract: A split-axis transmission hybrid system may include two planetary gear sets to provide two parallel torque paths from an input axis to an output axis. A secondary power source may be coupled to either the input axis or the output axis to provide torque to the system. Thus, the split-axis transmission hybrid system may provide the ratio preselection capability and the low power losses of a dual-clutch transmission and the ratio-changing control and smoothness of a traditional powershift automatic transmission, while also providing the improved efficiency and enhanced drivability of a hybrid power source arrangement.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: July 15, 2014
    Assignee: ZF Friedrichshafen AG
    Inventor: James Potter
  • Publication number: 20140190295
    Abstract: An oilfield pumping unit two-stage transmission gear reducer includes a low speed stage having a low speed shaft configured to receive motion from an intermediate shaft. A first gear pair includes a low speed shaft double circular arc gear mounted on the low speed shaft and configured to be driven by an intermediate shaft double circular arc gear mounted on the intermediate shaft. A high speed stage includes a high speed shaft configured to receive motion from an intermediate shaft. A second gear pair has a high speed shaft involute gear mounted on the high-speed shaft and configured to be driving an intermediate shaft involute gear mounted on the intermediate shaft.
    Type: Application
    Filed: March 7, 2013
    Publication date: July 10, 2014
    Inventors: Weidong Gao, Liu Qiang
  • Patent number: 8768588
    Abstract: A transmission includes a controller being provided with a change-speed stage anticipator. The controller adopts a time, which one of the transmission's gear-mechanism selectors requires in shifting a current change-speed stage to another change-speed stage, as a pre-shift time for selecting the latter change-speed stage. The change-speed stage anticipator operates the one of the gear-mechanism selectors while adopting a temporary change-speed stage as a subsequent change-speed stage when the temporary change-speed stage, which is estimated from a state of vehicle after the pre-shift time, the state of vehicle being relevant to each element of an anticipated change-speed stage group that is made up of one or more of the change-speed stages that can be selected by the one of the gear-mechanism selectors being set on one of the transmission's input shafts that is disconnected from a power source, coincides with an anticipated change-speed stage that corresponds to the pre-shift time.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 1, 2014
    Assignees: Aisin AI Co., Ltd., Aisin AW Co., Ltd.
    Inventors: Hiroki Hatori, Hiroshi Toyoda, Takeshige Miyazaki, Yoshiki Ito, Kiyoshi Nagami, Atsushi Takeuchi
  • Publication number: 20140174229
    Abstract: An automatic multi-speed gear system includes an input axle, a first arm coupled at one end with the input axle through bearings that allow for independent rotational movement of the input axle along its longitudinal axis. The first arm is also configured to rotate about the input axle as its pivot. The system also includes a first axle coupled with bearings at the opposing end of the first arm. A first set of gears coupled to the input axle and the first axle transfer the rotational motion of the input axle to the first axle. The system also includes a second arm coupled at one end with bearings to the first axle and at the opposing end to a second axle. The second axle is coupled through a one way bearing to an output axle. A second set of gears coupled to the first axle and the second axle transfer the rotational motion of the first axle to the second axle and a third set of gears coupled to the second axle and the output axle transfer the rotational motion of the second axle to the output axle.
    Type: Application
    Filed: February 19, 2014
    Publication date: June 26, 2014
    Inventor: Samir Moufawad
  • Patent number: 8757021
    Abstract: A transmission is connectable to an input member and includes an output transfer gear, first and second transmission input shaft members, first, second and third countershaft members, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of gears, synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: June 24, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventors: Tejinder Singh, Patrick S. Portell
  • Patent number: 8757020
    Abstract: A transmission is connectable to an input member and includes an output transfer gear, first and second shaft members, first, second and third countershaft members, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of gears, synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: June 24, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventors: Tejinder Singh, Patrick S. Portell
  • Patent number: 8747274
    Abstract: A transmission is disclosed having a planetary gear set with three input torque-transmitting mechanisms, such as friction clutches, to achieve torque flow through the planetary gear set to a countershaft gearing arrangement. The transmission includes an input member, an output member, a planetary gear set, an input clutch assembly having three input clutches and a countershaft gearing arrangement. The countershaft gearing arrangement is operatively connected with the planetary gear set and includes: a pair of co-planar intermeshing gears, first and second countershafts, a first intermediate shaft and a second intermediate shaft concentric with the first intermediate shaft.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: June 10, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventor: Andrew W. Phillips
  • Patent number: 8746099
    Abstract: A transmission control system to enable smooth engagement of meshing engagement device when establishing a forward gear position by engaging the meshing engagement device and a forward clutch while a vehicle is stationary. For example, when a synchro device is operated so as to establish a predetermined forward gear position, it becomes difficult to smoothly couple a first speed drive gear to the input shaft by the synchro device. However, temporarily engaging a reverse clutch during the process of operation of the synchro device allows a reverse torque to act on the first speed drive gear to apply torsion to a power transmission path between the first speed drive gear and a driven wheel. Furthermore, a repulsive force is applied and generates backlash between the synchro device and the first speed drive gear, thus enabling smooth operation of the synchro device.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: June 10, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventor: Ikuo Ohmori
  • Publication number: 20140144266
    Abstract: A power transmitting apparatus for a vehicle, includes a variable connecting device, an input device, a speed output device having first and second synchronizer modules, and a reverse speed device. An even-numbered highest speed gear is disposed at one of synchronizer modules related to even-numbered speeds among the synchronizer modules. An odd-numbered highest speed gear is disposed at one of synchronizer modules related to odd-numbered speeds among the synchronizer module.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 29, 2014
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Sueng Ho LEE, Chang Wook LEE, Jongsool PARK
  • Publication number: 20140144265
    Abstract: A power transmitting apparatus for a vehicle achieves seven forward speeds with a minimal number of input gears disposed on input shafts, since the second speed gear and the fourth speed gear are simultaneously engaged with the second input gear and the third speed gear and the seventh speed gear are simultaneously engaged with the third input gear, and distortion of step ratios at the high-speed region may be prevented.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 29, 2014
    Applicant: Hyundai Motor Company
    Inventors: Sueng Ho Lee, Chang Wook Lee, Jongsool Park
  • Patent number: 8733194
    Abstract: A transmission includes a transmission housing, a dual clutch assembly, a first through seven gear sets, a first transmission input shaft member rotatably supported in the transmission housing, a second transmission input shaft member rotatably supported in the transmission housing, a first countershaft rotatably supported within the transmission housing and spaced apart from and parallel with the first and second transmission input shaft members, a second countershaft rotatably supported within the transmission housing and spaced apart from and parallel with the first and second transmission input shaft members and five synchronizer assemblies each for selectively coupling at least one of the gears of the gear sets with at least one of the first countershaft and the second countershaft. The dual clutch assembly and the synchronizer assemblies are operable to achieve at least eight forward speed ratios and a reverse speed ratio between an input member and output member.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: May 27, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventors: Edward W. Mellet, Craig S. Ross, Scott H. Wittkopp
  • Patent number: 8733195
    Abstract: An actuating assembly for actuating synchronizing elements of a centrally synchronized dual-clutch transmission having at least a first part-transmission (6) and a second part-transmission (7) such that at least one synchronizing element is associated with each of the first and the second part-transmission (6, 7). A common actuator (1) is provided for actuating at least the synchronizing elements of the two part-transmissions.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: May 27, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Ralf Dreibholz, Eckhardt Luebke, Matthias Reisch, Juergen Wafzig
  • Patent number: 8725372
    Abstract: A method for adjusting the point of engagement of a friction clutch of a step-variable transmission for a motor vehicle, in particular a friction clutch of a dual clutch transmission. The friction clutch is controllably actuated by means of a clutch actuator and at least one synchronizer shifting clutch is controllably actuated by means of a shift actuator for the engagement and disengagement of a gear ratio of the spur-gear transmission. A set-point of the clutch actuator for the point of engagement of the friction clutch is adjusted as a function of a speed gradient value, which ensues from a transitional state with the friction clutch actuated and the shifting clutch actuated, once the shifting clutch is opened. The transitional state is established by setting the clutch actuator and the shift actuator to a respective transitional value substantially at the same time or, at least in sections, in parallel.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: May 13, 2014
    Assignees: GETRAG Getriebe-und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG, Bayerische Motoren Werke Aktiengesellschaft, Conti Temic microelectronic GmbH
    Inventors: Rainer Rinck, Markus Schuerlein, Tobias Soller
  • Patent number: 8720291
    Abstract: An automatic multi-speed gear system including an input axle, a first arm configured to couple with the input axle allowing for independent rotational movement of the input axle along the input axle axis, a first axle configured to couple with the first arm allowing for independent rotational movement of the first axle along a first axle axis, a second arm configured to couple with the first axle allowing for independent rotational movement of the first axle along the first axle axis, a second axle configured to couple with the second arm allowing for independent rotational movement of the second axle along a second axle axis, and an output axle. The first arm and the second arm are configured to move from a high-speed misalignment position to a low-speed alignment position where the second axle orbits the first axle.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: May 13, 2014
    Inventor: Samir Moufawad
  • Publication number: 20140123793
    Abstract: The present invention relates to a shifting device for a transmission unit of a vehicle, in particular a vehicle that is driven by muscle force. The transmission unit has a first shaft, which is formed as a hollow shaft, on which a plurality of free gears is mounted. The free gears are in engagement with a corresponding plurality of gearwheels, which are mounted on a second shaft, wherein the free gears are connectable to the first shaft by means of selecting devices. The selecting devices can be actuated by means of a camshaft arranged coaxially in the first shaft, wherein the camshaft is connected to a driving device in order to be rotated relative to the first shaft to actuate the selecting means.
    Type: Application
    Filed: January 13, 2014
    Publication date: May 8, 2014
    Inventors: Michael Schmitz, Christoph Lermen
  • Publication number: 20140123791
    Abstract: A transmission includes a housing, an input member connectable to an engine output member, and a launch clutch assembly connected to the input member. A first and a second countershaft are rotatably supported within the transmission housing. A plurality of co-planar gear sets are connected to the input member and the first and second countershafts. A plurality of torque transmitting mechanisms are provided for coupling various components of the co-planar gear sets to the input member and countershafts. The selective engagement of the launch clutch assembly and the torque transmitting mechanisms establishes at least one of six forward speed ratios and a reverse speed ratio.
    Type: Application
    Filed: November 6, 2012
    Publication date: May 8, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: Edward W. Mellet, Bret M. Olson
  • Publication number: 20140123792
    Abstract: A reverse arm is pivoted by a driving pin of a reverse fork inserted into a driven hole thereof, and the reverse arm thereby moves an idle gear in an axial direction, whereby the idle gear is engaged with and disengaged from a driving gear and a driven gear of a reverse gear train. The outside diameter of the driving pin is smaller than the width between opposed flat inner side surfaces of the driven hole of the reverse arm; thus, a gap is formed between the driving pin and the inner side surfaces. A jump-over mechanism JO is provided between the reverse arm and a transmission casing for elastically urging the reverse arm outward away from a predetermined intermediate position within the pivoting range of the reverse arm and brings the driving pin in contact with one of the inner side surfaces of the driven hole.
    Type: Application
    Filed: May 11, 2012
    Publication date: May 8, 2014
    Applicant: AISIN AI CO., LTD.
    Inventor: Atsushi Sakurai
  • Patent number: 8714040
    Abstract: A manual transmission for vehicles includes an input shaft on which a first synchronizer mechanism including first and second input gears, third, fourth, fifth, and sixth input gears are disposed, an output shaft on which a first output gear, first and second speed gears engaged respectively to the first and second input gears, a second synchronizer mechanism including third and fourth speed gears engaged respectively to the third and fourth input gears, and a third synchronizer mechanism including fifth and sixth speed gears engaged respectively to the fifth and sixth input gears, a reverse speed output shaft on which a second output gear and a fourth synchronizer mechanism including a reverse speed gear engaged to the third speed gear, and a driven gear engaged to the first and second output gears so as to receive torque, and delivering the torque to a differential.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: May 6, 2014
    Assignee: Hyundai Motor Company
    Inventors: Wan Soo Oh, Jae Woong Hwang, Haeng Woo Park
  • Patent number: 8707813
    Abstract: In a shiftable twin gear for a twin-clutch transmission and a twin-clutch transmission, to reduce the effort and costs involved in bearing-mounted idler gears, and in order to provide a simplified twin-clutch transmission a bearing sleeve which is non-rotatable with respect to a first gear body and which has a first bearing region for the bearing support of a second gear body is in the form of a separate component which is press-fitted to the first gear body.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: April 29, 2014
    Assignee: Daimler AG
    Inventors: Ingo Pfannkuchen, Harald Rüdle
  • Publication number: 20140109705
    Abstract: A parallel shift transmission of a motor vehicle comprising splitter and range groups. At least the splitter group is split into two parallel transmission branches having countershafts. One branch can be actuated by a power-shift element to transfer rotation of a drive shaft to a countershaft, via a stepped transmission ratio of the splitter group according to the actuation of one of the transmission branches and then converting and transmitting the rotation, via one of a plurality of range transmission ratios of the range group, to an output shaft. In order to reverse rotation, parallel countershafts can be coupled by individual gearwheel pairs by actuation of associated switching elements such that one countershaft, at the output side of the splitter group in the flow of power flow from the drive to the output shaft, is connected to the other countershaft at a drive side of the range group.
    Type: Application
    Filed: March 20, 2012
    Publication date: April 24, 2014
    Inventors: Matthias Reisch, Stefan Beck, Martin Fellmann
  • Patent number: 8689664
    Abstract: A backhoe loader includes a multi-axis transmission that includes: an input shaft to which power is inputted; a front output shaft coupled to a front wheel; a rear output shaft disposed in a position higher than that of the front output shaft and coupled to a rear wheel; an intermediate shaft disposed between the input shaft and the front output shaft; a first power transmission mechanism configured to transmit power from the input shaft to the intermediate shaft; and a second power transmission mechanism configured to transmit power from the intermediate shaft to the front output shaft and to transmit power from the front output shaft to the rear output shaft.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: April 8, 2014
    Assignee: Komatsu Ltd.
    Inventors: Hiroaki Takeshima, Yoshito Komatsu
  • Publication number: 20140090498
    Abstract: A gearbox includes a transmission mechanism and a clutch system including plural clutches. The gearbox has a gear change mechanism that is interlocked with a change pedal shaft to which rotational force by operation of a shift pedal is transmitted and arbitrarily selects a transmission gear of the transmission mechanism to perform gear shift. An ECU can electronically control connection/disconnection of the clutch system according to a shift position of the gear change mechanism.
    Type: Application
    Filed: September 13, 2013
    Publication date: April 3, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Hiroyuki KOJIMA, Yoshiaki TSUKADA, Yoshiaki NEDACHI, Kazuhiko NAKAMURA, Takashi OZEKI
  • Publication number: 20140080654
    Abstract: A transmission includes an input member, an output member, first and second interconnecting members, first and second countershaft members, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.
    Type: Application
    Filed: September 17, 2012
    Publication date: March 20, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Mikael B. Mohlin, Tejinder Singh, Patrick S. Portell, David M. Zini
  • Publication number: 20140069217
    Abstract: A transmission includes an input member, an output member, first and second transmission input shafts, first and second countershafts, a plurality of co-planar gear sets and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and six forward speed ratios between the input member and the output member.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 13, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: Scott H. Wittkopp, Craig S. Ross
  • Patent number: 8661941
    Abstract: A hybrid drive system with first drive 11—especially a combustion engine—and second drive 12—especially an electric machine—for driving a transmission output shaft 20 of a transmission 10 for a vehicle is provided. The transmission 10 can include a first shiftable partial transmission 15 with a first main shaft 17, which is connectable by a first group of shiftable gear pairs 41/51, 45/52, 43/53, 44/54 to an intermediate shaft 28, and the first drive 11 is connectable to the first main shaft 17 of the first shiftable partial transmission 15. In addition, a second shiftable partial transmission 16 with a second main shaft 18, which is connectable by a second group of shiftable gear pairs 45/51, 46/52, 47/53, 48/54 to the intermediate shaft 28, can be included.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: March 4, 2014
    Assignee: FEV Motorentechnik GmbH
    Inventors: Gereon Hellenbroich, Stefan Kohlhaas