Simultaneously Operative Clutches Patents (Class 192/3.26)
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Patent number: 10465782Abstract: A torque converter comprising: a damper assembly including a spring retainer; and, a turbine assembly connected to the damper assembly, the turbine assembly including: a turbine shell including an axially movable turbine piston; a drive plate fixed to the turbine piston; and a diaphragm spring, the drive plate having openings for receiving the diaphragm spring; the diaphragm spring acting on the turbine piston with a preload force. In an example aspect, the diaphragm spring includes a plurality of radially inward tabs and the drive plate includes a plurality of openings for receiving the radially inward tabs.Type: GrantFiled: May 5, 2017Date of Patent: November 5, 2019Assignee: Schaeffler Technologies AG & Co. KGInventors: Jeremy Vanni, Matthew Payne, Markus Steinberger
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Patent number: 10458540Abstract: Methods of repairing a torque converter that enable the continued use of a torque converter and result in a repaired torque converter with a higher-strength and more durable construction. In some examples, a backing ring can be replaced with a replacement backing ring that includes a spline ring for replacing the function of a cover spline ring. In some examples, a method of repairing a torque converter can be improved by providing a replacement backing ring with a radial protrusion for locating the backing ring on the cover, and a method of determining an axial location of the radial protrusion.Type: GrantFiled: January 3, 2018Date of Patent: October 29, 2019Assignee: Sonnax Transmission CompanyInventor: Michael G. Morin
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Patent number: 10451158Abstract: A torque converter, including: a cover; a lock-up clutch with a piston plate; an output hub; a first hub including a through-bore; a chamber bounded by the turbine; an apply chamber bounded by the piston plate; a release chamber bounded by the cover, the first hub, and the piston plate; a first flow path; a through-bore through the first hub; and a second flow path. The second flow path: is sealed from the first chamber; passes through the through-bore; and includes a portion circumferentially aligned with the first flow path. A line in an axial direction passes through the through-bore without intersecting the first hub. For a lock-up mode, pressurized fluid in the apply chamber displaces the piston plate in a first axial direction. For a torque converter mode, pressurized fluid in the release chamber displaces the piston plate in a second axial direction.Type: GrantFiled: November 6, 2017Date of Patent: October 22, 2019Assignee: Schaeffler Technologies AG & Co. KGInventors: Jeremy Vanni, Drew Hilty, Justin Clark
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Patent number: 10131342Abstract: A hybrid powertrain includes an engine having a crankshaft and a throttle body, and an electric machine having a rotor selectively coupled to the crankshaft via a disconnect clutch. A transmission of the powertrain includes a torque converter having an impeller fixed to the rotor, a turbine disposed on an input shaft of the transmission, and a bypass clutch configured to selectively transmit torque from the impeller to the turbine. A vehicle controller is programmed to, in response to the bypass clutch being open or slipping and the disconnect clutch being closed, command a throttle position of the throttle body based on an error between measured and estimated speeds of the impeller.Type: GrantFiled: December 14, 2016Date of Patent: November 20, 2018Assignee: Ford Global Technologies, LLCInventors: Jason Meyer, Rajit Johri
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Patent number: 9709146Abstract: A lock-up device for a torque converter includes a piston, a clutch part, a first hydraulic chamber, a second hydraulic chamber, a first hydraulic port and a second hydraulic port. The first hydraulic chamber is formed on a piston side of the front cover. The second hydraulic chamber is formed independently from the first hydraulic chamber. The first hydraulic port is in communication with the first hydraulic chamber. The second hydraulic port is formed independently from the first hydraulic port, and a portion of the second hydraulic chamber is in communication with the second hydraulic port. The first hydraulic chamber is sealed with the exception of a portion of the first hydraulic chamber that is in communication with the first hydraulic port. The second hydraulic chamber is sealed with the exception of the portion of the second hydraulic chamber that is in communication with the second hydraulic port.Type: GrantFiled: August 6, 2015Date of Patent: July 18, 2017Assignee: EXEDY CorporationInventor: Yoshihiro Matsuoka
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Patent number: 9677654Abstract: A torque converter including: a cover arranged to receive torque from an engine; an impeller; a turbine; an output hub arranged to non-rotatably connect to an input shaft for a transmission; a lockup clutch including an axially displaceable piston plate and arranged to directly connect the cover to the output hub; and a seal system including a pilot portion including first and second channels and a secondary hub non-rotatably connected to the output hub and axially displaceable with respect to the output hub to control flow of pressurized fluid through the first and second channels, or non-rotatably connected to the pilot portion and axially displaceable with respect to the pilot portion to control flow of pressurized fluid through the first and second channels.Type: GrantFiled: July 24, 2015Date of Patent: June 13, 2017Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventor: Jeremy Jewell
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Patent number: 9599205Abstract: A torque converter for a motor vehicle drive train is provided. The torque converter includes a damper including a first cover plate and a drive flange; and a stator assembly. The first cover plate is sealingly rotatable with respect to the stator assembly at a sealed interface and the first cover plate and the drive flange form a fluid flow gap therebetween. Fluid flows through the fluid flow gap during operation of the torque converter. The sealed interface prevents the fluid from flowing therethrough. A method of forming a torque converter is also provided.Type: GrantFiled: October 27, 2014Date of Patent: March 21, 2017Assignee: Schaeffler Technologies AG & Co. KGInventor: Brian Zaugg
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Patent number: 9541181Abstract: A torque converter features an impeller including an impeller shell and impeller blades, a turbine-piston including a turbine-piston shell and turbine blades, and a restrictor. The turbine-piston shell is axially displaceable relative to the impeller shell to position the torque converter (or a hydrokinetic torque coupling device containing the torque converter) into and out of lockup mode. The restrictor positioned radially outward of the impeller blades and the turbine blades at an opening of a fluid passage connecting the torus chamber to an environment outside the torque converter.Type: GrantFiled: October 23, 2014Date of Patent: January 10, 2017Assignee: Valeo EmbrayagesInventor: Alexandre Depraete
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Patent number: 9163767Abstract: In one example embodiment, a fluid transfer coupling arrangement includes a hollow shaft that is arranged in a housing and rotatable about an axis. The hollow shaft is provided by a wall having radially spaced interior and exterior surfaces. A first passage extends through the wall and is configured to communicate fluid between the interior and exterior surfaces. A fluid coupling is located mid-shaft, sealed about the exterior surface, and aligns to the first passage. The fluid coupling provides a second passage that is in fluid communication with the first passage. The fluid coupling includes a locating feature configured to permit radial movement of the fluid coupling relative to the housing and allowing the fluid coupling to track subtle shaft movements.Type: GrantFiled: January 16, 2012Date of Patent: October 20, 2015Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Dean A. Norem, Timothy P. Walgren
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Patent number: 8997956Abstract: A rotary electric drive device for a vehicle configured to couple a combustion engine to a wheel. The drive device includes an engagement device selectively drivingly connecting the input member with the rotary electric machine and a fluid coupling. The engagement device includes a differential pressure generating chamber that receives oil supply so as to apply hydraulic pressure to a side of the pressing member opposite to a side to which hydraulic pressure for operation is applied. A body portion housing chamber housing a body portion of the fluid coupling and the differential pressure generating chamber are structured as oil chambers independent of each other. The drive device includes a coupling supply oil passage supplying oil to the body portion housing chamber and a differential pressure supply oil passage supplying the oil to the differential pressure generating chamber.Type: GrantFiled: November 18, 2010Date of Patent: April 7, 2015Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Mikio Iwase, Tomohide Suzuki, Naoya Jinnai, Tatsuya Okishima, Toshihiko Kamiya, Terufumi Miyazaki, Yukihiko Ideshio
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Patent number: 8991576Abstract: In a torque converter device for a motor vehicle having a single-piece housing element which, for drivingly interconnecting a torque converter and an internal combustion engine, wherein the housing element forms a disk carrier accommodating at least one disk of a separating clutch which is provided for mechanically connecting and disconnecting the internal combustion engine to and from the torque converter device, the housing element is provided with at least one actuating piston receptacle forming a pressure chamber with an actuating piston disposed therein for actuating the separating clutch.Type: GrantFiled: February 6, 2014Date of Patent: March 31, 2015Assignee: Daimler AGInventors: Stefan Sperrfechter, Tobias Haerter, Heinrich Straub, Bernhard Ziegler, Tobias Schuster
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Patent number: 8955658Abstract: It is provided a vehicle power transmission device having a torque converter and a power transmission mechanism in a power transmission path between an engine and drive wheels, the torque converter including an input-side rotating member disposed with a plurality of pump blades, an output-side rotating member disposed with a plurality of turbine blades receiving a fluid flow from the pump blades, and a stator disposed with a stator blade disposed between the pump blades and the turbine blades, the power transmission mechanism transmitting power input to an input shaft from the torque converter to a subsequent stage, within a circulation flow passage allowing circulation of fluid in the torque converter, a circulation outward passage allowing the fluid to flow toward the inside of the torque converter at the time of the circulation being made up of a gap between the input shaft of the power transmission mechanism and a tubular stator shaft coupled via a one way clutch to the stator, and the stator shaft beingType: GrantFiled: November 24, 2010Date of Patent: February 17, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yukihiko Ideshio, Terufumi Miyazaki, Toshihiko Kamiya, Shingo Eto, Hironori Asaoka, Yasuyuki Kato
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Patent number: 8640839Abstract: A control device for a vehicular power transmitting system including a torque converter (6) having a pump impeller (6p), a turbine wheel (6t), a stator wheel (6s) rotatably disposed between the turbine wheel and the pump impeller, and a lock-up clutch (L/U) includes a capacity coefficient control unit (126) that controls a capacity coefficient of the torque converter by controlling rotation of the stator wheel, and the capacity coefficient control unit increases the capacity coefficient of the torque converter based on an amount of heat generated during slip control of the lock-up clutch.Type: GrantFiled: November 12, 2009Date of Patent: February 4, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tsuyoshi Fujikane, Kazuyuki Shiiba, Hiromitsu Metsugi, Hiroki Takeda
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Patent number: 8631918Abstract: A torque transmission assembly is disposed between a power source and a vehicle transmission and includes an annular housing, a pump member of a fluid coupling, a turbine member of the fluid coupling, a lockup clutch, a first shaft, a first selectable clutch, a second shaft, and a second selectable clutch. The turbine member opposes the pump member and the lockup clutch is selectively engaged between the pump member and the turbine member. The first selectable clutch is selectively engaged between the turbine member and the first shaft. The second selectable clutch is selectively engaged between the turbine member and the second shaft.Type: GrantFiled: July 21, 2010Date of Patent: January 21, 2014Assignee: GM Global Technology Operations LLCInventors: Darrell Lee Robinette, Victor M. Roses
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Patent number: 8627934Abstract: A fluid transmission device includes a pre-damper (10) that transmits driving force received from a crankshaft (100) to a front cover (20) via first damper springs (14), a mechanism (30) that transmits the driving force transmitted to a pump (31) to a turbine (32) via hydraulic fluid, a piston member (40) that is disposed between the front cover (20) and the mechanism (30) and delivers the driving force to an output shaft (200), a dynamic damper (60) that connects the piston member (40) and the turbine (32) via second damper springs (63), a lock-up clutch (50) that enables the front cover (20) and the piston member (40) to engage with each other, a turbine clutch (70) that enables the turbine (32) and the piston member (40) to engage with each other, and a control device (80) that controls the lock-up clutch (50) and the turbine clutch (70).Type: GrantFiled: October 9, 2009Date of Patent: January 14, 2014Assignee: Toyta Jidosha Kabushiki KaishaInventors: Kiyohito Murata, Takuya Okada
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Patent number: 8545367Abstract: A hybrid system includes a hybrid module that is located between an engine and a transmission. The hybrid system includes an energy storage system for storing energy from and supplying energy to the hybrid module. An inverter transfers power between the energy storage system and the hybrid module. The hybrid system also includes a cooling system, a DC-DC converter, and a high voltage tap. The hybrid module is designed to recover energy, such as during braking, as well as power the vehicle. The hybrid module includes an electrical machine (eMachine) along with electrical and mechanical pumps for circulating fluid. A clutch provides the sole operative connection between the engine and the eMachine. The hybrid system further incorporates a power take off (PTO) unit that is configured to be powered by the engine and/or the eMachine.Type: GrantFiled: June 20, 2012Date of Patent: October 1, 2013Assignee: Allison Transmission, Inc.Inventors: James F. Hartz, Nayan V. Patel, Vernon D. Thompson, Paul A. Richardson, Christopher A. Baker, George S. Pelton
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Patent number: 8540602Abstract: A drive device for a hybrid vehicle is provided with an engine and a motor generator. A one-way clutch is provided between the engine and the motor generator. Power is transmitted from the engine to the motor generator, while power from the motor generator to the engine is blocked. As a result, the electric motor can be operated without operating the engine. Furthermore, a torque converter is connected to the motor generator, and the engine is connected to the torque converter via a starting clutch. As a result, if a one-way clutch is provided, the motor generator can serve as a starter motor.Type: GrantFiled: September 19, 2011Date of Patent: September 24, 2013Assignee: Fuji Jukogyo Kabushiki KaishaInventor: Masatoshi Ishikawa
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Patent number: 8327986Abstract: A force transmission device having a hydrodynamic component, disposed between an input and an output, comprising at least a pump shell and a turbine shell, forming an operating cavity in combination, with an actuatable clutch device for at least partially bridging the hydrodynamic component, comprising a clutch component for at least partially bridging the hydrodynamic component, comprising a first clutch component connected with the input and a second clutch component at least indirectly connected to the output, which can be brought into operative engagement with one another through an actuation device, with a vibration absorber disposed in the force flow at least subsequent to the actuatable clutch device, with a housing coupled with the input or with an element coupled non-rotatably to the input and coupled with the pump shell.Type: GrantFiled: September 3, 2009Date of Patent: December 11, 2012Assignee: Schaeffler Technologies AG & Co. KGInventors: Dominique Engelmann, Mario Degler, Bruno Mueller
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Patent number: 8245826Abstract: A power transmitting apparatus for transmitting power from a driving source of a vehicle to its wheels can be adapted to properly select transmitting or cutting-off of the driving force of the driving source to or from the wheels. The apparatus can comprise a torque converter having a torque amplifying function; a clutch mechanism including a first clutch device operable on advancement of the vehicle and adapted to transmit the driving force of the driving source to the wheels through a power transmitting system of the torque converter and a second clutch device adapted to transmit the driving force of the driving source to the wheels without the power transmitting system of the torque converter. A selecting device can be configured to operate the first clutch device and/or the second clutch device in accordance with operation modes of the vehicle, including starting.Type: GrantFiled: March 30, 2011Date of Patent: August 21, 2012Assignee: Kabushiki Kaisha F.C.C.Inventors: Tatsuyuki Ohashi, Shouji Asatsuke, Akio Oishi, Ryouhei Chiba, Jun Ishimura, Keiichi Ishikawa
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Patent number: 8235191Abstract: A force transfer device with an input and an output, a hydrodynamic component, disposed between input and output, comprising at least one pump shell and one turbine shell and a device for bridging the power transfer through the hydrodynamic component, and a device for damping vibrations. The invention further relates to a drive train with such force transfer device and to a process for controlling the operation of a force transfer device in a drive train, comprising a first drive engine and an electrical machine, which can be operated at least as a generator. The invention is characterized in that an actuatable clutch device is disposed between the turbine shell and the output for decoupling the turbine shell from the output, and said clutch device is disposed in parallel with the lockup clutch. During braking operations through the electrical machine the lockup clutch and the turbine clutch are being deactivated.Type: GrantFiled: December 7, 2007Date of Patent: August 7, 2012Assignee: Schaeffler Technologies AG & Co. KGInventor: Gregory Heeke
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Patent number: 8042665Abstract: A torque converter including an impeller clutch with a first portion connected to a cover for the torque converter and a second portion connected to an impeller; and a lever element in contact with the clutch and displaceable to multiply a first force applied to the lever element for operation of the clutch. In some aspects, the converter includes an impeller piston plate engaged with the lever element and displaceable to apply the force to the lever element. In some aspects, the torque converter includes a torus and a charge chamber for the impeller clutch, a second force is associated with a hydraulic pressure to prevent cavitation in the torus, a third force is required to operate the impeller clutch to transmit a desired torque across the impeller clutch, and the multiplied force is at least equal to a sum of the second force and a third forces.Type: GrantFiled: December 11, 2007Date of Patent: October 25, 2011Assignee: Schaeffler Technologies GmbH & Co. KGInventor: Todd J. Sturgin
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Publication number: 20110233019Abstract: A power transmitting apparatus for transmitting power from a driving source of a vehicle to its wheels can be adapted to properly select transmitting or cutting-off of the driving force of the driving source to or from the wheels. The apparatus can comprise a torque converter having a torque amplifying function; a clutch mechanism including a first clutch device operable on advancement of the vehicle and adapted to transmit the driving force of the driving source to the wheels through a power transmitting system of the torque converter and a second clutch device adapted to transmit the driving force of the driving source to the wheels without the power transmitting system of the torque converter. A selecting device can be configured to operate the first clutch device and/or the second clutch device in accordance with operation modes of the vehicle, including starting.Type: ApplicationFiled: March 30, 2011Publication date: September 29, 2011Applicant: KABUSHIKI KAISHA F.C.C.Inventors: Tatsuyuki Ohashi, Shouji Asatsuke, Akio Oishi, Ryouhei Chiba, Jun Ishimura, Keiichi Ishikawa
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Patent number: 7980992Abstract: A torque converter including a damper assembly connected to a hub for the torque converter; a turbine clutch connected to a turbine and the damper assembly; and a torque converter clutch connected to a cover for the torque converter and the damper assembly. In an idle mode, the turbine clutch and the torque converter clutch are disengaged and the torque converter cover is rotationally disconnected from the hub. In a torque converter mode, the turbine clutch is engaged, the torque converter clutch is disengaged, and the turbine clutch rotationally locks the turbine and the damper assembly. In a lock-up mode, the torque converter clutch is engaged and the torque converter clutch rotationally connects the torque converter cover and the damper assembly.Type: GrantFiled: December 7, 2007Date of Patent: July 19, 2011Assignee: Schaeffler Technologies GmbH & Co. KGInventor: Todd Sturgin
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Patent number: 7926635Abstract: A piston assembly for arrangement in a pressure cavity in a force transfer device for operating a first and a second actuatable clutch device, comprising a piston element associated respectively with an actuatable clutch device. The invention is characterized in that the piston element of the second clutch device is guided at the piston element of the first clutch device movable against a stop, forming an additional second cavity, loadable with pressure medium, wherein the first piston element is movable in an axial direction, relative to the piston element of the second clutch device.Type: GrantFiled: December 19, 2007Date of Patent: April 19, 2011Assignee: Schaeffler Technologies GmbH & Co. KGInventor: Eugen Kombowski
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Patent number: 7815026Abstract: A system for controlling a torque converter of an automatic transmission driven by a power source, the system including a torque converter an impeller, a turbine driveably connected to a transmission input and able to be driven hydrokinetically by the impeller, a stator, an impeller clutch for alternately engaging and disengaging a drive connection between the impeller and the power source, a source of converter charge pressure communicating with the impeller clutch, a source of converter discharge pressure communicating with the impeller clutch, a magnitude of differential force due to charge pressure and discharge pressure across the impeller clutch alternately producing operating multiple operating states of the impeller clutch, and a orifice having a variable fluid flow area for changing a magnitude of converter discharge pressure.Type: GrantFiled: March 15, 2007Date of Patent: October 19, 2010Assignee: Ford Global Technologies, LLCInventors: Jacob M. Povirk, William R. Simpson
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Patent number: 7717243Abstract: In one embodiment, a torque converter is provided with a fluid coupling and a viscous coupling. The viscous coupling includes a plurality of closely-spaced surfaces, wherein facing ones of the closely-spaced surfaces are alternately splined to rotate with driving or driven elements of the torque converter, and wherein the closely-spaced surfaces have an average spacing that causes ones of the surfaces rotating with the driving elements to exert a viscous pull on ones of the surfaces rotating with the driven elements when the torque converter is filled with a viscous fluid. A fluid receiving portion of the torque converter receives a viscous fluid into the torque converter, and a fluid return portion expels the viscous fluid from the torque converter.Type: GrantFiled: October 31, 2006Date of Patent: May 18, 2010Inventor: Clint D. Cannon
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Patent number: 7644812Abstract: A method for controlling an impeller clutch of a torque converter includes determining a function relating a K-factor of the torque, determining a current engine torque, determining a desired impeller clutch slip, using the function determine the actual impeller speed and thus actual clutch slip, and adjusting the operating state of the impeller clutch to produce the desired impeller clutch slip.Type: GrantFiled: May 1, 2007Date of Patent: January 12, 2010Assignee: Ford Global Technologies, LLCInventors: William R. Simpson, Jacob M. Povirk, Christopher G. Garbacz, David B. Plasencia
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Patent number: 7445099Abstract: A torque transmission device includes a torque converter, a pump impeller, a turbine wheel and optionally a stator. The device also includes a converter bypass coupling having a flange which is connected to the housing or the pump impeller in a force-locking manner. The flange is arranged between the pump impeller and the turbine wheel and can be connected to the turbine wheel in a frictionally engaged manner by means of a first coupling.Type: GrantFiled: June 25, 2003Date of Patent: November 4, 2008Assignee: Luk Lamellen und Kupplungsbau Beteiligungs KGInventors: Edmund Maucher, William Brees
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Publication number: 20080149442Abstract: A torque converter including an impeller clutch connected to an impeller; a torque converter clutch connected to an output hub for the torque converter; and a same plate included in the impeller clutch and in the torque converter clutch and at least indirectly connected to a cover for the torque converter. The impeller clutch includes a first portion exclusive of the same plate, the torque converter clutch includes a second portion exclusive of the same plate, and in some aspects, the same plate is axially disposed between the first and second portions. In some aspects, the torque converter includes a damper assembly rotationally connected to the same plate and the cover. In torque converter mode, an impeller clutch release chamber and the torus are hydraulically isolated.Type: ApplicationFiled: December 10, 2007Publication date: June 26, 2008Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KGInventor: Todd J. Sturgin
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Patent number: 7287629Abstract: A hydrodynamic actuating device has one prime mover, one torque converter and one rear-mounted transmission and is especially adequate for construction machines of wide range of motion such as wheel loaders. For limiting the maximum traction, one primary clutch (16) and one converter bridging clutch (WK) are both coordinated with the torque converter, which are disposed in series so as to be switchable via a single valve controlled by the transmission control with only a control pressure so that in all driving situations, first, the primary clutch (16) and thereafter the converter bridging clutch (WK) are closed.Type: GrantFiled: November 8, 2003Date of Patent: October 30, 2007Assignee: ZF Friedrichshafen AGInventor: Jürgen Legner
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Patent number: 7225907Abstract: A hydraulic pressure control system for an automatic transmission is comprised of an engagement element engaged when the vehicle runs and a first engagement control actuator controlling the engagement element by supplying the controlled hydraulic pressure to the engagement element when the vehicle starts running. An effective cross sectional area of the engagement element is set at a minimum area which has an engagement capacity capable of transmitting a maximum torque inputted from the engine when the engagement element receives a maximum pressure controlled by the first engagement control actuator.Type: GrantFiled: February 23, 2005Date of Patent: June 5, 2007Assignee: JATCO LtdInventors: Yoshiaki Katou, Isamu Ohtake
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Patent number: 7028820Abstract: A hydrodynamic clutch arrangement is provided with at least a pump wheel and a turbine wheel to form a hydrodynamic circuit in a clutch housing, the drive-side wall of the housing being connected on the side facing the drive unit, such as an internal combustion engine, to the drive unit, a clutch device being provided to bring the housing into or out of working connection with the pump wheel. The clutch device is located inside the clutch housing.Type: GrantFiled: March 29, 2004Date of Patent: April 18, 2006Assignee: ZF Friedrichshafen AGInventors: Herbert Johann, Herbert Schmid, Fritz Leber
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Patent number: 6889804Abstract: The present invention provides a clutch connection method which controls the disconnection/connection of a wet friction clutch on the basis of a duty pulse outputted from an electronic control unit. When the clutch is connected, the electronic control unit initially outputs a start duty (Dst) for largely connecting the clutch as far as the vicinity of a torque point, and, thereafter, outputs, at prescribed time intervals (?t), a gradual connection duty (Dk) for gradually connecting the clutch, and determines a gradual connection duty value on the basis of a clutch input/output side revolution difference ?N. Since the clutch is gradually connected while monitoring the clutch connection state, variations between connection times and connection shock, resulting from individual clutch differences or the like, can be eliminated, whereby it is possible to achieve a stable feel.Type: GrantFiled: June 25, 2002Date of Patent: May 10, 2005Assignee: Isuzu Motors LimitedInventors: Eiji Inoue, Takumi Shinojima
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Publication number: 20040216971Abstract: A hydrodynamic clutch arrangement is provided with at least a pump wheel and a turbine wheel to form a hydrodynamic circuit in a clutch housing, the drive-side wall of the housing being connected on the side facing the drive unit, such as an internal combustion engine, to the drive unit, a clutch device being provided to bring the housing into or out of working connection with the pump wheel. The clutch device is located inside the clutch housing.Type: ApplicationFiled: March 29, 2004Publication date: November 4, 2004Applicant: ZF Friedrichshafen AGInventors: Herbert Johann, Herbert Schmid, Fritz Leber
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Publication number: 20030000789Abstract: The present invention provides a clutch connection method which controls the disconnection/connection of a wet friction clutch on the basis of a duty pulse outputted from an electronic control unit. When the clutch is connected, the electronic control unit initially outputs a start duty (Dst) for largely connecting the clutch as far as the vicinity of a torque point, and, thereafter, outputs, at prescribed time intervals (&Dgr;t), a gradual connection duty (Dk) for gradually connecting the clutch, and determines a gradual connection duty value on the basis of a clutch input/output side revolution difference &Dgr;N. Since the clutch is gradually connected while monitoring the clutch connection state, variations between connection times and connection shock, resulting from individual clutch differences or the like, can be eliminated, whereby it is possible to achieve a stable feel.Type: ApplicationFiled: June 25, 2002Publication date: January 2, 2003Inventors: Eiji Inoue, Takumi Shinojima
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Patent number: 6405844Abstract: A working vehicle including a power transmission system capable of surely preventing a slip is provided. For this purpose, the working vehicle is a working vehicle having a modulating clutch (2) which flexibly changes traveling power transmitted from an engine (1) to a torque converter (3), and a controller (8) which controls a degree of engagement of the modulating clutch (2), characterized by including rotational frequency detectors (21, 21) which detect the rotational frequencies of right and left driving wheels (7, 7) of the vehicle, respectively, and characterized in that the controller (8) controls the degree of engagement of the modulating clutch (2) by detecting a sign of a wheel slip based on a difference in the rotational frequency between the right and left driving wheels (7, 7) detected by the rotational frequency detectors (21, 21), to prevent a slip.Type: GrantFiled: September 7, 2000Date of Patent: June 18, 2002Assignee: Komatsu Ltd.Inventor: Nobumasa Takamatsu
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Publication number: 20010025754Abstract: In a transmitting system for a small-sized vehicle in which a crankshaft of an engine and an input shaft of a multi-stage transmission are connected to each other through a fluid transmitting device, the fluid transmitting device and a shifting clutch being mounted on the crankshaft and connected in series to each other. One of the fluid transmitting device and the shifting clutch is connected to the crankshaft, and the other is connected to the input shaft of the multi-stage transmission through a primary reducing device. Thus, when the multi-stage transmission is to be shifted, the shifting operation of the multi-stage transmission can be carried out lightly, irrespective of a creep phenomenon of the fluid transmitting device, by bringing the shifting clutch into its OFF state. Moreover, the burden of torque by the fluid transmitting device and the shifting clutch mounted on the crankshaft which is rotated at a higher speed than that of the input shaft of the transmission is relatively small.Type: ApplicationFiled: November 12, 1999Publication date: October 4, 2001Applicant: ARENT FOX KINTNER PLOTKIN & KAHN, PLLCInventors: Tokuji Yoshimoto, Tadashi Nagao, Teruo Kihara
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Patent number: RE48872Abstract: The invention relates to a hydrodynamic torque converter having an impeller wheel, a turbine wheel and an oscillation damper which is accommodated in the converter housing, and a converter lockup clutch. Two damper stages are arranged here as a serial damper between the output hub of the torque converter and the converter lockup clutch, and a damper stage is arranged between the turbine wheel and the output hub. In order to improve the damping properties, a rotary oscillation absorber is additionally provided which is arranged between the dampers and is also connected to the turbine wheel in a rotationally fixed fashion.Type: GrantFiled: September 14, 2017Date of Patent: January 4, 2022Assignee: Schaeffler Technologies AG & Co. KGInventors: Heiko Magerkurth, Christian Huegel, Andreas Meissner