Class / Patent application number | Description | Number of patent applications / Date published |
074330000 | Multiple concentric clutch shafts | 69 |
20080271555 | Bearing Arrangement of the Transmission Shafts of a Twin-Clutch Transmission - The invention relates to a bearing arrangement of the transmission shafts of a twin-clutch transmission ( | 11-06-2008 |
20090078069 | TWIN CLUTCH TYPE SPEED CHANGE CONTROL SYSTEM - In a twin clutch type speed change control system in which changeover of gear position is carried out by switching between a pair of clutches, to suppress the noises of clutch being in the disengaged condition during a normal operation with a fixed gear position. In the twin clutch type speed change control system, changeover of gear position between an odd-ordinal gear position and an even-ordinal gear position is effected by disengaging an engaged clutch and engaging a disengaged clutch. During the normal operation with a fixed gear position, the clutch being in the disengaged condition is supplied with a minute oil pressure toward the clutch engaging side, whereby the clutch is moved by a minute amount toward the clutch engaging side. | 03-26-2009 |
20090084209 | TWIN CLUTCH TYPE SPEED-CHANGE APPARATUS - A twin clutch type speed-change apparatus applies a dog clutch to speed-change gears slid on a main shaft and a counter shaft for changing the number of speed-change steps. A twin clutch type speed-change apparatus includes a transmission having a plurality of gear pairs between a main shaft and a countershaft and a twin clutch. The rotational drive force of the engine is connected/disconnected between the transmission and the engine by the twin clutch. A dog clutch with dog teeth and a dog hole is applied between an axially slidably attached slidable gear and an axially non-slidably attached non-slidable gear to select an on gear pair for transmitting the rotational drive gear, from a plurality of gear pairs in the transmission. Rotational drive force is transmitted between the slidable gear slid by a shift fork and the coaxially adjacent non-slidable gear by engagement of the dog clutch. | 04-02-2009 |
20090084210 | TWIN CLUTCH SPEED-CHANGE APPARATUS - A twin clutch speed-change apparatus that can reduce shift shock includes a transmission with multiple gear pairs disposed between a main shaft and a countershaft. A twin clutch is provided on the main shaft, a rotational drive force from an engine being connected/disconnected between the transmission and the engine, a dog clutch is provided between an axially slidably attached slidable gear and an axially non-slidably attached non-slidable gear to select a gear pair, for transmitting a rotational drive force, from the multiple gear pairs. Dog teeth of the dog clutch include steps different in axial height from each other between a portion abutted against a lateral wall surface of a dog hole when the rotational drive force is transmitted by the dog clutch, and a portion abutted against a lateral wall surface of the dog hole when the rotational drive force is not transmitted by the dog clutch. | 04-02-2009 |
20090120221 | DUAL CLUTCH TRANSMISSION WITH MODIFIABLE GEAR SPEEDS AND USE OF THE TRANSMISSION FOR AT LEAST TWO TRANSMISSION VARIATIONS - A modifiable dual clutch transmission is suggested allowing to be manufactured as two transmission variations having an interdependence of fixed wheels and loose wheels that remains at the same position for both variations while the loose wheels belonging to this interdependence are provided with different diameters for providing different transmission ratios. At least one of the loose wheels in that interdependence is correlated to a different forward gear in one transmission variation compared to the other transmission variation. In both transmission variations the loose wheels relating to the respective interdependences are correlated only to even numbered forward gears or to odd numbered forward gears, preserving the advantage of the dual clutch transmission to shift between two adjacent forward gears without interruption in the tractive power. | 05-14-2009 |
20100126291 | DOUBLE-CLUTCH GEARBOX - A double-clutch gearbox includes two primary shafts and at least one secondary shaft. Each of a plurality of gear pairs mechanically couples the primary shaft to the secondary shaft and defines a respective gear. Each gear pair includes a primary gear mounted to the primary shaft and a secondary gear, which is mounted to the secondary shaft and permanently meshes with the primary gear. Synchronizers coaxially mounted to a shaft are coupled to a gear of at least one gear pair and adapted to be actuated to engage the gear with the shaft. Forks that actuate the synchronizers are movably mounted and have corresponding catches. A single control shaft is rotationally mounted about and can be slid axially along a longitudinal axis. A single gear actuator is connected to the control shaft to rotate the control shaft about and axially displace the control shaft along the longitudinal axis. | 05-27-2010 |
20100162840 | Double clutch gear change transmission - In a gear wheel speed change transmission with at least two power shift clutches, with gear wheels arranged in different gear wheel planes and with an input shaft and an output shaft, which can be actively interconnected by way of the gear wheels arranged in the gear wheel planes, which include at least six forward gears that can be shifted under power, all of the six forward gears, which are sequentially power-shiftable, and two reverse gears are formed by exactly six gear wheel planes and exactly three shift units with shift collars, which all have engagement positions at both sides of their neutral center position. | 07-01-2010 |
20100192717 | Variable-speed gear wheel transmission - In a gear shift transmission comprising at least two input shafts, which can be connected to a drive shaft via at least two power shift clutches and a plurality of gear wheels disposed in gear wheel planes and comprising an output shaft, which can be operatively connected to the input shafts, the transmission includes at least two sequentially shiftable forward gears and a shifting device, which is provided for shifting one of the gear wheel planes as an input constant for forming at least one gear and as a gear wheel pair for forming a further gear and the gear wheel plane comprises an idler wheel which is connectable to one of the input shafts in a torque proof manner. | 08-05-2010 |
20100199792 | DRIVE TRAIN - A drive train, which has an internal combustion engine with a crankshaft and a parallel shift transmission with two part drive trains, which each have one transmission input shaft. One shaft is formed as a hollow shaft around the other shaft, and a dual clutch, which is received rotatably on the hollow shaft, is connected to the crankshaft and has two friction clutches and two clutch plates each assigned to one clutch and are each connected to one transmission input shaft. Each clutch plate has a torsional vibration damper with a working range which is smaller than a maximum torque of the engine. A build-up of a combined vibration which has an axial vibration of the dual clutch and a rotational vibration of the drive train during an overlap shift operation is prevented by the design of the torsional vibration dampers for a smaller torque. | 08-12-2010 |
20100212440 | INTEGRATED CONTROL FOR DOUBLE CLUTCH - Transmission including a dual clutch transferring the torque of an engine to two input primary shafts of a gearbox, each clutch including one disk connected in rotation to one of the primary shafts, that can be tightened between plates of which one is axially mobile thanks to a control mechanism, one of these control mechanisms including a piston guided by a cylindrical surface integrated into an axial housing of a primary shaft, characterised in that the guiding cylindrical surface is located as close as possible to the shaft's housing, this surface being directly made inside the shaft's housing or inside a body inserted into the housing which end is connected to the casing of the gearbox via a fastening shifted outside the housing. | 08-26-2010 |
20100242646 | DUAL CLUTCH TRANSMISSION - A double clutch transmission with two clutches that have inputs connected to a drive shaft and outputs which are each connected to one of first and second transmission input shafts. Fixed gears are coupled to the input shafts and engage idler gears. Several coupling devices connect the idler gears to a respective countershaft which have an output gear that couples with an output shaft such that forward and reverse gears can be shifted. First and second dual gear planes each comprise two idler gears supported by a respective countershaft, and one fixed gear. In each of the first and the second gear planes, at least one idler gear is used for two gears. First and second single gear planes each comprise an idler gear and a fixed gear such that at least one winding-path gear can be shifted via at least one, non-engaged coupling device, assigned to one of the output gear. | 09-30-2010 |
20100251840 | SEVEN SPEED DUAL CLUTCH TRANSMISSION - 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. | 10-07-2010 |
20100251841 | FIVE SPEED DUAL CLUTCH TRANSMISSION - A transmission includes an input member, an output member, first and second 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 a plurality of forward speed ratios between the input member and the output member. | 10-07-2010 |
20100257954 | DUAL CLUTCH TRANSMISSION - A transmission includes an input member, an output member, first and second shafts, a countershaft, a reverse shaft, 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. | 10-14-2010 |
20100257955 | DOUBLE CLUTCH TRANSMISSION - A double clutch transmission with two clutches having input sides connected to a drive shaft and the output sides connected to one of two transmission input shafts which are coaxially arranged, at least two countershafts on which toothed idler gearwheels are supported, toothed fixed gearwheels are arranged in a rotationally fixed manner on both of the transmission input shafts and mesh with at least one of the idler gearwheels. A plurality of coupling devices, each connecting one idler gearwheels to a countershaft in a rotationally fixed manner, and one power take-off gear provided on each of the two countershafts, each of which gearwheels is coupled with gearing of an output shaft, such that a plurality of power shift forward gears and at least one reverse gear can be shifted. | 10-14-2010 |
20100257956 | DOUBLE CLUTCH TRANSMISSION - A double clutch transmission comprising two clutches each having an input side connected to a drive shaft and an output side connected to one of two transmission input shafts coaxially arranged with respect to one another. At least two countershafts, on which toothed idler gearwheels are pivotally supported and toothed fixed gearwheels are disposed on both transmission input shafts in a rotationally fixed manner and mesh with at least some of the idler gearwheels. A plurality of coupling devices connect an idler gearwheel to a countershaft in a rotationally fixed manner. One output gear is provided on both countershafts which is coupled to gearing of an output shaft. At least one first shift element connects two toothed gearwheels in a rotationally fixed manner such that a plurality of power shifting forward gears and at least one reverse gear can be shifted. | 10-14-2010 |
20100257957 | DOUBLE CLUTCH TRANSMISSION - A double clutch transmission comprising two clutches, the input sides of which are connected to a drive shaft and the output sides of which are connected to one of two transmission input shafts coaxially arranged with respect to each other. At least two countershafts are provided on which toothed gearwheels, embodied as idler gearwheels, are supported. Toothed gearwheels, embodied as fixed gearwheels, are provided on both transmission input shafts in a rotationally fixed manner. At least one shift element is provided for connecting two toothed gearwheels in a rotationally fixed manner and at least a plurality of power shifting forward gears and/or at least one reverse gear may be shifted. Six gear planes are provided such that at least one power shifting winding path gear may be shifted via at least the shift element. | 10-14-2010 |
20100257958 | DOUBLE CLUTCH TRANSMISSION - A double clutch transmission with two clutches with input sides connected to a drive shaft and output sides each respectively connected to one of two transmission input shafts disposed coaxially to one another. At least two countershafts are provided upon which toothed idler gearwheels are mounted in a rotatable manner and toothed fixed gearwheels are disposed on the two transmission input shafts in a rotationally fixed manner. At least one shift element is provided for connecting two idler gearwheels in a rotationally fixed manner such that at least several power shiftable forwards gears and/or at least one reverse gear can be shifted. A maximum of six gear planes are provided so that at least one power shiftable winding path gear can be shifted using the at least one shift element. | 10-14-2010 |
20100257959 | DOUBLE CLUTCH TRANSMISSION - A double clutch transmission comprising two clutches (K | 10-14-2010 |
20100257960 | DOUBLE CLUTCH TRANSMISSION - A double clutch transmission with first and second clutches (K | 10-14-2010 |
20100269606 | DUAL CLUTCH TRANSMISSION - A transmission includes an input member, an output member, first and second 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 a plurality of forward speed ratios between the input member and the output member. | 10-28-2010 |
20100269607 | DUAL CLUTCH TRANSMISSION - A transmission includes an input member, an output member, first and second 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 a plurality of forward speed ratios between the input member and the output member. | 10-28-2010 |
20100269608 | DUAL CLUTCH TRANSMISSION - A transmission is connectable to an input member and includes an output member, first and second 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 a plurality of forward speed ratios between the input member and the output member. | 10-28-2010 |
20100269609 | DUAL CLUTCH TRANSMISSION - A transmission includes an input member, an output member, first and second 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 a plurality of forward speed ratios between the input member and the output member. | 10-28-2010 |
20100269610 | DUAL CLUTCH TRANSMISSION - A transmission includes an input member, an output member, first and second 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 a plurality of forward speed ratios between the input member and the output member. | 10-28-2010 |
20100288064 | SEVEN SPEED DUAL CLUTCH TRANSMISSION - A transmission includes an input member, an output transfer gear, first and second shaft 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. | 11-18-2010 |
20100294057 | SEVEN SPEED DUAL CLUTCH TRANSMISSION - A transmission is connectable to an input member and includes an output transfer gear, first and second shaft 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 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. | 11-25-2010 |
20100294058 | SEVEN SPEED DUAL CLUTCH TRANSMISSION WITH FOUR AXES OF ROTATION - A transmission connectable to an input member and has an output member, first and second transmission input shaft members, first and second countershaft members, a reverse shaft, 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 transmission input members and the output member. | 11-25-2010 |
20100294059 | SEVEN SPEED DUAL CLUTCH TRANSMISSION - A transmission connectable to an input member and having an output transfer gear, first and second transmission input shaft 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 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. | 11-25-2010 |
20110023638 | GEAR ARRANGEMENTS FOR 7-SPEED DUAL CLUTCH TRANSMISSION - Double-clutch transmission (DCT) includes, but is not limited to two input shafts that are connected to two clutch discs respectively. The DCT further includes, but is not limited to gearwheels on layshafts and the input shafts. The gearwheels include, but are not limited to six gearwheel groups for providing six gears respectively. Each of the gearwheel groups include, but are not limited to a fixed gearwheel on one of the input shafts, meshing with an idler gearwheel on one of the layshafts. A third fixed gearwheel meshes with the third gear idler gearwheel and the fifth gear idler gearwheel. Additionally, the DCT device further includes, but is not limited to a seventh gearwheel group for providing a seventh gear. The seventh gearwheel group includes, but is not limited to a seventh fixed gearwheel, meshing with a seventh gear idler gearwheel. The DCT further includes, but is not limited to a reverse gear idler shaft and one reverse gearwheel on the reverse gear idler shaft for providing a reverse gear. | 02-03-2011 |
20110067512 | COAXIAL MULTI-CLUTCH TRANSMISSION - Disclosed herein is a coaxial multi-clutch transmission which can enhance fuel efficiency. The transmission includes a main input shaft, a first input shaft, a second input shaft, a first clutch, a second clutch, a power transmitting gear unit, an output shaft, drive gears and driven gears. The first and second input shafts have a coaxial structure and are power-connected to the main input shaft. The first clutch is provided on the first input shaft to control power connection between the main input shaft and the first input shaft. The second clutch is provided on the second input shaft to control power connection between the main input shaft and the second input shaft. The power transmitting gear unit functions to transmit power to the first clutch and the second clutch. | 03-24-2011 |
20110107860 | DUAL CLUTCH MULTI-SPEED TRANSMISSION - A transmission includes an input member, an output transfer gear, first and second shaft members, a countershaft or layshaft, a reverse shaft member, 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 transfer gear. | 05-12-2011 |
20120103116 | DRIVE ASSEMBLY COMPRISING TWO CLUTCHES AT THE INPUT END, AND METHOD FOR THE OPERATION THEREOF - A drive assembly for a motor vehicle with a transmission that can be powershifted and comprises splitter and main transmissions, input and output shafts, loose and fixed gearwheels which form transmission gears, and shifting devices for coupling the loose gearwheels to at least one of the transmission shafts. The splitter transmission has first and second gear constants, and the inputs of the first and second gear constants can be driven by the outputs of two clutches whose inputs can be driven by a motor. One of the clutches is a frictional starting and shifting clutch and the other is a claw clutch, the inputs of the first and second gear constants can be driven alternatively by the output of the starting and shifting clutch, and that by way of the output of the claw clutch the input of only one of the gear constants can be driven. | 05-03-2012 |
20120160044 | MULTIPLE CLUTCH TRANSMISSION AND VEHICLES AND APPARATUS INCLUDING A MULTIPLE CLUTCH TRANSMISSION - 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. | 06-28-2012 |
20120234119 | GEAR CHANGE DEVICE FOR A MOTOR VEHICLE - A gear change device for a motor vehicle includes a first and a second primary shaft coaxial with respect to each other, selectively connectable to the driving shaft of the motor vehicle, and a first and a second secondary shaft, whose axes are parallel and spaced from the common axis of said primary shafts. A fifth shaft is parallel and spaced with respect to the common axis of the two primary shafts and with respect to the axes of the two secondary shafts. A parking gear wheel is connected in rotation with the further pinion and cooperates with a locking device in. a parking condition. The parking gear wheel is mounted freely rotatable around the axis of the fifth shaft. The parking gear wheel extends radially towards the first secondary shaft within the space between the first reverse gear wheel and a rolling bearing which rotatably supports the first secondary shaft. The bearing is axially interposed between the first reverse gear wheel and the output pinion of the first secondary shaft. | 09-20-2012 |
20120240699 | Drive arrangement for a motor vehicle - A drive arrangement for a motor vehicle includes two driven axles, wherein at least one of the axles can be connected and disconnected, with a variable speed transmission having at least one input shaft, two driven shafts, each driven shaft driving a respective axle, and several forward gears and optionally one reverse gear which can be switched via gear wheels and synchronous couplings. The drive arrangement can be easily switched between different drive modes by dividing the variable speed transmission into two sub-transmissions, of which one sub-transmission drives exclusively a first axle via a portion of the forward gears and the one driven shaft and the second sub-transmission drives both driven shafts via the remaining portion of the forward gears and optionally the reverse gear. | 09-27-2012 |
20120240700 | DOUBLE CLUTCH TRANSMISSION OF A MOTOR VEHICLE - A double clutch transmission of a motor vehicle with a first input shaft (W | 09-27-2012 |
20130031989 | SEVEN SPEED DUAL CLUTCH TRANSMISSION - 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. | 02-07-2013 |
20130031990 | EIGHT SPEED DUAL CLUTCH TRANSMISSION - 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. | 02-07-2013 |
20130031991 | EIGHT SPEED DUAL CLUTCH TRANSMISSION - 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. | 02-07-2013 |
20130031992 | SEVEN SPEED DUAL CLUTCH TRANSMISSION - 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. | 02-07-2013 |
20130031993 | EIGHT SPEED DUAL CLUTCH TRANSMISSION - 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. | 02-07-2013 |
20130061701 | TRANSMISSION FOR A VEHICLE - A dual clutch transmission for a motor vehicle which comprises at least two part-transmissions each of which has at least one input shaft and an output shaft arranged as the drive output shaft of both part-transmissions. The at least one input shaft and the output shaft are arranged on a main axis and/or a secondary axis and at least one intermediate transmission with at least one countershaft is provided, the at least one countershaft is designed as the secondary axis relative to the main axis, and at least one of the input shafts can be connected to the output shaft by at least two gearwheel planes and/or by way of at least one shifting element. A plurality of shifting elements N in number are provided with N being an integer larger than or equal to two such that N-1 shifting elements are arranged on the main axis. | 03-14-2013 |
20130133450 | MULTI-CLUTCH TRANSMISSION FOR A MOTOR VEHICLE - A multi-clutch power shift transmission for a motor vehicle with at least one prime mover is provided, where a shaft brake unit is arranged to reduce the rotational speed of one of two input shafts, and a central synchronizing unit is arranged to make a first of the input shafts rotate faster or slower than a second of the input shafts. The shaft brake unit and the central synchronizing unit are arranged to be simultaneously activated in order to reduce rotating speeds prior to the engagement of tooth clutches when the output shaft is not rotating. The input shaft brake unit is arranged to be used when performing a multi-step power shift. | 05-30-2013 |
20130167676 | DUAL CLUTCH TRANSMISSION DESIGNED AS REDUCTION GEARING - A dual clutch transmission designed as a reduction gearing which has concentric central and hollow transmission shafts, exactly one layshaft, and two power shift elements. A hollow shaft is provided coaxially on the layshaft, which can be rotatably fixed to the layshaft, via one shift device, and to which at least two gears of the gear stages are rotatably fixed. A further hollow shaft is provided coaxially on either the central or the hollow transmission shaft, which can be connected, via one of the shift devices, with the central or the hollow transmission shaft and to which at least two further gears of the gear stages are rotatably fixed. At least three transmission ratios are obtainable as a result of engaging the shift element into the power flow in three of the gear stages, by which one transmission ratio results from engaging only one shift element into the power flow. | 07-04-2013 |
20130180351 | DUAL CLUTCH TRANSMISSION - A dual clutch transmission is provided in which since at a time of pre-shifting when, while running, via one driving force transmission path of first and second driving force transmission paths extending from a first and second input shafts ( | 07-18-2013 |
20140109704 | CLUTCH FOR TRANSMISSION - A clutch for a transmission is provided in which a transmission case includes a first wall portion and a second wall portion that define a clutch housing chamber for housing a clutch outer, a clutch inner, a friction member, and an extension portion of a first gear shaft that extends from a shaft end portion of a second gear shaft, the clutch outer is supported on the first wall portion via a first bearing, and the clutch inner is supported on the through hole of the second wall portion, through which the first gear shaft extends, via a second bearing, and therefore, it is possible to enhance the coaxiality of the clutch outer and the clutch inner by supporting them on the transmission case independently from the first and second gear shafts, prevent the torque transmission capacity of the clutch from decreasing, and avoid the occurrence of judder. | 04-24-2014 |
20140116169 | TRANSMISSION - A first synchronizing sleeve ( | 05-01-2014 |
20140150583 | DUAL CLUTCH TRANSMISSION CONTROL METHOD, DUAL CLUTCH TRANSMISSION, AND VEHICLE MOUNTED THEREWITH - A method of controlling a dual clutch transmission, a dual clutch transmission, and a vehicle equipped with the same which can reduce the load on a clutch on a start gear side to reduce the wear thereof and therefore make the clutch replacement interval longer. There are a first input shaft to be connected to a first clutch and a second input shaft to be connected to a second clutch. A set of odd-numbered gears and a set of even-numbered gears are arranged respectively across the first input shaft and second input shaft and and an output shaft. When a vehicle starts, a start gear and a support gear are synchronously engaged to the second input shaft and the first input shaft, respectively, and simultaneously connecting the first clutch and the second clutch partially (half clutch state) to the first input shaft and the second input shaft, respectively, the support gear having a gear ratio smaller than that of the start gear by one speed or higher. | 06-05-2014 |
20140150584 | CONTROL METHOD FOR DUAL CLUTCH TRANSMISSION, DUAL CLUTCH TRANSMISSION, AND VEHICLE LOADED WITH SAME - A method for controlling a dual clutch transmission, a dual clutch transmission, and a vehicle equipped with the same. A first input shaft is connected to a first clutch and a second input shaft is connected to a second clutch. A set of odd-numbered gears and a set of even-numbered gears are arranged respectively across the first input shaft and second input shaft and an output shaft. Two of the gears are set as a start gear and a support gear, respectively. A one-way clutch is provided between the support gear and the first input shaft to let the support gear freewheel when a vehicle is started by synchronously engaging the start gear and the support gear to the second input shaft and the first input shaft, respectively, and simultaneously bringing each of the first clutch and the second clutch into a connected state. A third clutch connects the first input shaft and the second input shaft and rotates them together when the vehicle is started. | 06-05-2014 |
20140157923 | DOUBLE CLUTCH TRANSMISSION - A double clutch transmission includes a variable connector including a first clutch and a second clutch and outputting engine torque through the first and second clutches. An input driver includes a first input shaft connected to the engine with a plurality of input gears disposed on an exterior circumference thereof. A second input shaft is connected to the engine with a plurality of input gears disposed on an exterior circumference thereof. A speed output driver includes a first output shaft disposed in parallel with the input shafts, a first speed output disposed on the first output shaft with first and second synchronizers, a second output shaft disposed in parallel with the first and second input shafts, and a second speed output disposed on the second output shaft with third and fourth synchronizers. A reverse speed/motor driver is disposed between the input device and the speed output device. | 06-12-2014 |
20140157924 | MOTOR VEHICLE TRANSMISSION - A motor vehicle transmission having two partial transmissions with coaxial input shafts which can connect to an output shaft. The inputs of the first and second partial transmissions are a central shaft and a hollow shaft, respectively, that are coaxial with the output shaft. A countershaft assembly is parallel to the input and output shafts, to transmit rotation from the drive input to the output via a variety of gears. Gear stages ( | 06-12-2014 |
20140165755 | DUAL CLUTCH POWERSHIFTING TRANSMISSION - A dual clutch transmission is provided with first and second coaxial input shafts, at least one mainshaft, and an output shaft that are coaxial with one another. The transmission has a countershaft offset from the first input shaft that supports seven countershaft gear elements drivably connected to respective gear elements on the first and second input shafts and the at least one mainshaft thereby forming seven forward gear meshes for the transmission. The seven forward gear meshes provide at least nine forward gear ratios for the transmission. The transmission is powershiftable between consecutive gear ratios of the at least nine gear ratios such that no torque interrupt occurs during sequential shifts. | 06-19-2014 |
20140174228 | Automated Manual Transmission - The present invention pertains to an automated manual transmission, and particularly to an automated manual transmission which can implement 7 forward gear changes and 1 reverse gear change. The present invention provides an automated manual transmission, which comprises: a first input shaft to which the power of an engine is transmitted; a second input shaft to which the power of an engine is transmitted; a driving gear section mounted to the first and second input shafts; a clutch section for transmitting or blocking the power of the engine with respect to the first input shaft or the second input shaft; a first output shaft to which the power is transmitted from the first input shaft or the second input shaft; a second output shaft to which the power is transmitted from the first input shaft or the second input shaft, and having a plurality of shaft portions which are disposed on a same axis; a driven gear section including a plurality of driven gears which are mounted on the first output shaft and the second output shaft; and a synchronization section for connecting or disconnecting the first output shaft and the second output shaft with respect to the driven gear section so as to implement multiple gear changes. The clutch section includes a first clutch which is mounted to the first input shaft so as to transmit or block the power of the engine and a second clutch which is mounted to the second input shaft so as to transmit or block the power of the engine. | 06-26-2014 |
20140260738 | ELEVEN SPEED DUAL CLUTCH TRANSMISSION - A transmission is connectable to an input member and includes an output transfer gear, first and second shaft 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 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. | 09-18-2014 |
20140366665 | ENHANCED DUAL CLUTCH TRANSMISSION - A dual clutch transmission (DCT) with double-range change. In one embodiment, the dual clutch transmission includes odd and even lay shafts and a separate range change shaft for each, thereby providing a range change for both the odd and even gear sets. The input shaft may include an extension gear that can be selectively driven by the inner input shaft or the outer input shaft to provide additional gear pairings. The extension gear may include a synchronizer on each face to allow it to be coupled to either the outer or inner input shaft. The transmission may include a reverse shaft coupled with the even lay shaft. The transmission may include a dual half synchronizer having a single hub and a split sleeve. The parts of the split sleeve are separately movable to allow independent synchronization of two pairs of rotating components. | 12-18-2014 |
20150020624 | MULTI-CLUTCH TRANSMISSION FOR A HEAVY DUTY VEHICLE - A multi-clutch transmission is provided with a first and a second input frictional clutch, an input arrangement for establishing a driving connection of a prime mover and the first and second frictional clutches, and a main transmission. The main transmission has a first and a second rotational axis about which a main shaft and a countershaft is arranged respectively, an output shall and connection means for establishing a driving connection between the main shaft and the output shaft, and least two input shafts, which are connected to the first and second input frictional clutch, and a reverse shaft provided with a first reverse gear wheel. A reverse gear is achieved by transferring power over the reverse shaft to the output shaft. | 01-22-2015 |
20150027252 | POWER TRANSMITTING APPARATUS FOR VEHICLE - A power transmitting apparatus may include first and second input shafts selectively receiving torque of a power source through first and second clutches, first and second output shafts disposed in parallel with the first and second input shafts, a plurality of input gears disposed on the first and second input shafts, and at least five speed gears selectively connected to the first and second output shafts through a plurality of synchronizer modules. | 01-29-2015 |
20150040705 | TRIPLE INPUT CLUTCH TRANSMISSION - A transmission has a three input torque-transmitting mechanism, such as friction clutches, to achieve torque flow through a countershaft gearing arrangement. The transmission includes an input member, an output member, an input clutch assembly having three input clutches and a countershaft gearing arrangement. The countershaft gearing arrangement is operatively connected with the input clutch assembly and includes: co-planar intermeshing gear sets, first and second countershafts, first, second and third intermediate input shafts. | 02-12-2015 |
20150059504 | POWER TRANSMITTING APPARATUS FOR VEHICLE - A power transmitting apparatus for a vehicle may include a variable connecting device including a first clutch and a second clutch and selectively outputting torque of an engine through the first clutch and/or the second clutch, an input device including first and second input shafts selectively connected to the engine through the first and second clutches, and a speed output device including a first output shaft, a first speed output unit with first and second synchronizer modules, a second output shaft, and a second speed output unit with third, fourth, and fifth synchronizer modules. In the power transmitting apparatus, one seventh speed gear engaged with any one input gear on the first input shaft and another seventh speed gear engaged with any one input gear on the second input shaft are disposed on the first or second output shaft. | 03-05-2015 |
20150068336 | DUAL CLUTCH TRANSMISSION - A dual clutch transmission includes a first and second concentric input shafts, a dual clutch assembly, a mainshaft coaxial with the first input shaft, a first countershaft, a second countershaft, and planetary range gearing with high and low ratios. The dual clutch transmission has six forward gear meshes and the high and low range ratios of the range gearing to provide ten forward gear ratios for the transmission. The transmission is powershiftable between consecutive gear ratios of the ten forward gear ratios such that no torque interrupt occurs during sequential shifts. | 03-12-2015 |
20150096393 | POWER TRANSMITTING APPARATUS FOR VEHICLE - A power transmitting apparatus may selectively transmit torque of power source to two input shafts through two clutches and may output changed torque through two output shafts after the torque selectively transmitted to the two input shafts is changed. The two input shafts may respectively have a plurality of input gears fixed thereon, the two output shafts may respectively have a plurality of speed gears rotatable on the output shafts and a plurality of synchronizers operably connecting each speed gear to any one of the output shafts, and each input gear may be engaged with at least one speed gear. | 04-09-2015 |
20150101430 | POWER TRANSMITTING APPARATUS FOR VEHICLE - A power transmitting apparatus may selectively transmit torque of power source to two input shafts through two clutches and may output changed torque through two output shafts after the torque selectively transmitted to the two input shafts is changed, wherein the two input shafts may respectively have a plurality of input gears fixed thereon, the two output shafts may respectively have a plurality of speed gears rotatable on the output shafts and a plurality of synchronizers operably connecting each speed gear to any one of the output shafts, and each input gear may be engaged with at least one speed gear. | 04-16-2015 |
20150114152 | POWER TRANSMITTING APPARATUS FOR VEHICLE - A power transmitting apparatus for a vehicle may include first and second input shafts selectively receiving torque of a power source through first and second clutches, first and second output shafts disposed in parallel with the first and second input shafts, a plurality of input gears disposed on the first and second input shafts, and at least six speed gears selectively connected to the first and second output shafts through a plurality of synchronizer modules. | 04-30-2015 |
20150128736 | DUAL CLUTCH TRANSMISSION - A dual clutch transmission includes a first and a second input shaft provided with a first and second input arrangement, respectively, a centre shaft, a countershaft, and a first and a second primary gear step. The first and second input shaft are coaxially arranged with the centre shaft and can transfer torque from the first and second input means to the countershaft via the first and the second primary gear step. The first primary gear step including a first input gearwheel and a first driven gearwheel. The first input gearwheel is rotationally fixed with the first input shaft. The first input gearwheel is arranged upon the centre shaft. | 05-14-2015 |
20160010725 | MULTI-SPEED DUAL CLUTCH TRANSMISSION | 01-14-2016 |
20160084351 | POWER TRANSMISSION APPARATUS FOR VEHICLE - A power transmission apparatus may include a first input shaft having at least one input gear and selectively connected to a power source through a first clutch, a second input shaft having at least one input gear and selectively connected to the power source through a second clutch, a first speed output unit including a first output shaft and at least one speed gear engaged with the at least one input gear on the first and second input shafts, a second speed output unit including a second output shaft and at least one speed gear engaged with the at least one input gear on the first and second input shafts and rotatably disposed on the second output shaft, and an idle module including at least two idle gears on an idle shaft. | 03-24-2016 |
20160116035 | DUAL CLUTCH TRANSMISSION FOR A MOTOR VEHICLE - The invention relates to a dual clutch transmission ( | 04-28-2016 |
20180023670 | DUAL CLUTCH TRANSMISSION FOR A MOTOR VEHICLE | 01-25-2018 |