Pulley With Belt-receiving Groove Formed By Drive Faces On Relatively Axially Movable Coaxial Confronting Members (e.g., Expansible Cone Pulley, Etc.) Patents (Class 474/8)
  • Patent number: 10309532
    Abstract: In a first process, a tangential friction coefficient of a non-slippage side pulley of a drive pulley and a driven pulley is estimated from a tangential friction coefficient and a winding diameter of a slippage side pulley. In a second process, torque transmitted by a metal belt is calculated from the tangential friction coefficient and the winding diameter. In a third process, a required axial thrust of the non-slippage side pulley is calculated from the torque and the winding diameter. In a fourth process, the gear ratio is changed by reducing a ratio holding axial thrust of the non-slippage side pulley toward the required axial thrust. Therefore, the gear shifting can be performed merely by reducing the axial thrust of the non-slippage side pulley, and thus it is possible to improve the durability of the pulleys or the metal belt and to reduce a load of a hydraulic pump.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: June 4, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventor: Toru Yagasaki
  • Patent number: 10066746
    Abstract: In a region in which a rate of change in slip ratio of a transmission belt with respect to a change in input torque exceeds a permissible slip ratio rate of change set in advance, a steep change in the slip ratio is suppressed by limiting the rate of change in the input torque.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: September 4, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Mitsuhiro Fukao, Hiroki Kondo, Akira Hino, Atsushi Ayabe, Daisuke Inoue, Akihide Ito
  • Patent number: 10060514
    Abstract: A continuously variable chain-belt transmission (chain-belt CVT) housed in a transmission casing formed by a transmission case and a side cover, has a pair of conical disk pairs, each pair of which is rotatably supported by disk supporting portions provided in the transmission case and the side cover; a chain wound around the pair of conical disk pairs; a chain guide attached to the chain to restrain movement of the chain and having an annular guide portion that encloses an entire circumference, in cross section, of the chain; and a chain guide supporting portion supporting the chain guide between the transmission case and the side cover. The chain guide supporting portion has a fixing side chain guide supporting portion fixed to the transmission case and a connecting side chain guide supporting portion connecting to the fixing side chain guide supporting portion.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: August 28, 2018
    Assignees: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Takayuki Nakamura, Hidekazu Yagi, Kazutaka Imai
  • Patent number: 9551403
    Abstract: A V-belt continuously variable transmission in which an actuator unit for driving a movable sheave is slidably supported by a transmission case that is formed by fastening a plurality of case members with a plurality of fastening members, for ensuring a sufficient space for slidably moving the actuator unit and enhancing workability of mounting and dismounting operation of the actuator unit. A flat mounting surface for mounting the actuator unit is formed on an outer surface of the transmission case. Also, a recessed portion recessed inwardly of the transmission case from the mounting surface is formed to have at an inner end thereof a fastening seat face for a specific fastening member out of the plurality of fastening members, the specific fastening member being disposed at a portion corresponding to the mounting surface. The whole specific fastening member is disposed inwardly of the transmission case relative to the mounting surface.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: January 24, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kenichiro Kakemizu, Go Morita, Hiroyasu Yoshizawa, Kohei Matsuura, Hirokazu Komuro
  • Patent number: 9334954
    Abstract: Disclosed herein is a method for controlling slip of a continuously variable transmission using a transmission control unit (TCU), comprising: receiving, by a transmission control unit, information related to determination of slip which occurs during vehicle's running; calculating a slip determining coefficient by the transmission control unit; determining, by the transmission control unit, whether the slip has occurred according to the slip determining information and a predefined slip determining algorithm; and selecting and switching to, by the transmission control unit, one of a plurality of preset slip modes based on the slip determining coefficient and a result obtained by determining whether the slip has occurred.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: May 10, 2016
    Assignee: HYUNDAI AUTRON CO., LTD.
    Inventors: Seo Yeon Cho, Jang Sun Sim, Gyeong Hwan Yoon, Hyoung Chang Hahm
  • Patent number: 9103407
    Abstract: The invention relates to a disk set arrangement with a driving disk set and a driven disk set for a chain-type CVT, wherein each disk set of said arrangement comprises two disks that are axially displaceable relative to one another on a shaft and a chain arrangement comprising thrust pieces that are active between said disks. The longitudinal axis of said thrust pieces runs parallel to the rotational axis of the shaft, and the frictional surfaces of the disks and the thrust pieces have a curvature determined by a radius and an eccentricity, wherein the eccentricity of the disk in the driving disk set is different to that of the driven disk set.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: August 11, 2015
    Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventors: Nicolas Rickling, Peter Schmid
  • Patent number: 9017193
    Abstract: A belt-type continuously variable transmission for a vehicle includes: a primary pulley including a first fixed sheave fixed to an input shaft, and a first movable sheave relatively non-rotatable and relatively movable in axial direction to the input shaft due to spline-fitting of a female spline formed on an inner circumferential portion thereof to a male spline formed on the input shaft; a secondary pulley including a second fixed sheave fixed to an output shaft in parallel with the input shaft, and a second movable sheave relatively non-rotatable and relatively movable in the axial direction to the output shaft due to spline-fitting of a female spline formed on an inner circumferential portion thereof to a male spline formed on the output shaft; and a transmission belt, the belt-type continuously variable transmission for a vehicle disposed with at least one of a first groove width defining portion disposed on the primary pulley for defining a maximum groove width of the first pulley groove and a second gr
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: April 28, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masanori Kadokawa
  • Publication number: 20150094176
    Abstract: A V-belt continuously variable transmission in which an actuator unit for driving a movable sheave is slidably supported by a transmission case that is formed by fastening a plurality of case members with a plurality of fastening members, for ensuring a sufficient space for slidably moving the actuator unit and enhancing workability of mounting and dismounting operation of the actuator unit. A flat mounting surface for mounting the actuator unit is formed on an outer surface of the transmission case. Also, a recessed portion recessed inwardly of the transmission case from the mounting surface is formed to have at an inner end thereof a fastening seat face for a specific fastening member out of the plurality of fastening members, the specific fastening member being disposed at a portion corresponding to the mounting surface. The whole specific fastening member is disposed inwardly of the transmission case relative to the mounting surface.
    Type: Application
    Filed: September 25, 2014
    Publication date: April 2, 2015
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Kenichiro KAKEMIZU, Go MORITA, Hiroyasu YOSHIZAWA, Kohei MATSUURA, Hirokazu KOMURO
  • Publication number: 20150087453
    Abstract: A belt tension adjustment apparatus for vehicles, including a rotational shaft of a rotor; a first coupling pin and a second coupling pin protruding in a direction perpendicular to the rotational shaft; an outer pulley penetrating the rotational shaft and having a first coupling part extending toward a front direction, the first coupling part enclosing the rotational shaft and having a first slit penetrating at a point corresponding to the first coupling pin, and the first slit having an arc shape convex in the front direction. An inner pulley is disposed between the rotor and the outer pulley, to penetrate the rotational shaft, and has a second coupling part extending in a rear direction. The second coupling part encloses the rotational shaft and has a second slit penetrating at a point corresponding to the second coupling pin. The second slit has an arc shape convex in the rear direction.
    Type: Application
    Filed: December 11, 2013
    Publication date: March 26, 2015
    Applicant: Hyundai Motor Company
    Inventor: Kum Lim CHOI
  • Publication number: 20150011344
    Abstract: A belt type continuously variable transmission device includes an actuator that moves a moveable sheave member of a drive pulley which is a one-side pulley in an axial direction. The actuator includes a moveable feed member, a gear case, and an electric motor. The moveable feed member includes an inner tube section in which a moveable-side feed screw is provided, an outer tube section in which an outer gear is provided, and a lid section. The gear case has a fixed tube section in which a fixed-side feed screw is provided, and an outer cover. The electric motor drives a motor-side gear that intermeshes with the outer gear. The outer cover has an opening into which the outer tube section is inserted and that proximately opposes an outer circumferential surface of the outer tube section.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: TOMOYUKI EBIHARA, Tatsuya Kamada, Michio Tsukamoto, Koji Iwaki
  • Patent number: 8915811
    Abstract: A continuously variable transmission includes a first shaft integrally rotatably coupled to a primary pulley, a second shaft integrally rotatably coupled to the secondary pulley, a first gear mounted on the first shaft and relatively rotatable with respect to the first shaft, a second gear fixed on the second shaft and engaged with the first gear, a forward clutch for coupling an engine and the first shaft, and a reverse clutch for coupling the engine and the first gear.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: December 23, 2014
    Assignee: Jatco Ltd
    Inventor: Teruyoshi Horiike
  • Patent number: 8888617
    Abstract: With respect to a belt type continuously variable transmission in which a belt is wound around between a primary pulley and a secondary pulley, each of which includes a stationary sheave and a movable sheave, and a transmission is carried out by forwardly and backwardly moving the movable sheave with respect to the stationary sheave, a boss portion that protrudes in an axial direction is integrally formed with the stationary sheave of the secondary pulley, and a parking gear is provided on the outer circumferential side of the boss portion. Further, the configuration to hold the bearing is achieved using the inner circumferential portion of the boss portion integrally formed with the stationary sheave, that is, the inner circumferential portion of the parking gear so as to shorten the axial length of the secondary shaft, whereby achieving cost reduction.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: November 18, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masanori Kadokawa
  • Publication number: 20140335981
    Abstract: A pulley mechanism of a vehicular belt-type continuously variable transmission that makes it possible to enhance the joint strength between a rotary shaft and a stationary sheave without increasing the axial length of the belt-type continuously variable transmission is provided. Since a first stationary portion and a second stationary portion are provided on both sides of a step portion respectively, a stationary sheave is fixed by this first stationary portion and this second stationary portion, and the joint strength between the stationary sheave and an output shaft increases. Besides, a belt reaction force during power transmission can be received by the first stationary portion and the second stationary portion.
    Type: Application
    Filed: October 21, 2011
    Publication date: November 13, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masanori Kadokawa, Yasuhiro Kawai, Hirofumi Nakada
  • Publication number: 20140329627
    Abstract: A speed control mechanism for controlling selective engagement of the self-propelled transmission assembly for a walk-behind lawn mower is provided. The speed control mechanism is also configured to control the relative output speed of the transmission assembly. The speed control mechanism includes a speed engagement assembly and a speed adjustment assembly, wherein the speed engagement assembly includes a pair of rotatable levers for causing the transmission assembly to actuate between a disengaged position and an engaged position and the speed adjustment assembly includes a rotatable knob for causing the relative output speed of the transmission assembly to the wheels of the lawn mower to increase or decrease.
    Type: Application
    Filed: July 15, 2014
    Publication date: November 6, 2014
    Inventors: Philip Helin, Rick Baehr
  • Patent number: 8864610
    Abstract: A belt type continuously variable transmission for a vehicle includes: an input shaft and an output shaft disposed in parallel with each other; a pair of groove width variable pulleys disposed on the outer circumferential sides of the input shaft and the output shaft; and a transmission belt wound around each of V-grooves of the pair of the groove width variable pulleys, the belt type continuously variable transmission for a vehicle changing a winding diameter of the transmission belt by changing the groove widths of the V-grooves so as to continuously vary a gear ratio, wherein the groove width variable pulley includes a fixed sheave fixed to an outer circumferential surface of one of the input shaft and the output shaft, and a movable sheave disposed relatively non-rotatably on the one shaft and relatively movably in the direction of the shaft center of the one shaft so as to form the V-groove with the fixed sheave, wherein the belt type continuously variable transmission for a vehicle is disposed with a pa
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: October 21, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masanori Kadokawa
  • Patent number: 8863368
    Abstract: [Problems] To provide power transmission chain manufacturing method and apparatus which can prevent a pin against damage when, by increasing a pre-tension, a more proper residual compression stress is applied to a link. [Means for Solving Problems] The manufacturing apparatus comprises a pre-tension applying apparatus 31 which includes a first pre-tension applying pulley 32 and a second pre-tension applying pulley 33 around which an endless shaped chain 1 can be wound. The mutually opposed sheave surfaces 32a and 33a of the pre-tension applying pulleys 32 and 33 are respectively formed to have a concave shape which corresponds to the convex curved portion 14a of the end face of a pin 14.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: October 21, 2014
    Assignee: Jtekt Corporation
    Inventors: Shinji Yasuhara, Shinji Yamane
  • Patent number: 8857594
    Abstract: A friction drive clutch includes a hub, a thrust plate that rotates with and is axially slidable on the hub, a first housing rotatable with respect to the hub and including at least two first ramped members each having a sloped face, a second housing rotatable with respect to the thrust plate and axially movable together with the thrust plate, the second housing including at least two second ramped members each having a sloped face, a third housing rotatable with respect to the hub, and a spring assembly biasing the thrust plate and second housing axially toward the first housing, wherein when the second housing is rotated in one direction, the sloped faces of the first and second members slide over each other to urge the second housing and thrust plate axially in opposition to the spring assembly to bring the thrust plate into frictional engagement with the third housing.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: October 14, 2014
    Assignee: The Hilliard Corporation
    Inventors: Robert A. Schlaufman, Brenton H. Barron
  • Publication number: 20140287854
    Abstract: A chain (endless flexible member) is looped over an input pulley and an output pulley. Each of the input pulley and the output pulley includes a pair of a fixed sheave and a movable sheave. The fixed sheave and the movable sheave have tapered faces that are opposed to each other to define a V-shaped groove. A vibration damping plate (vibration damping member) is fixed to each fixed sheave, and is in contact with the outer peripheral face of the fixed sheave. When the fixed sheave vibrates, the vibrations are damped by the friction between the outer peripheral face of the fixed shave and the vibration damping plate.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 25, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Shinji YAMANE, Keisuke MORI, Teruhiko NAKAZAWA, Haruhiro HATTORI
  • Publication number: 20140248981
    Abstract: In one example, a transmission is provided that includes a sheave of selectively variable configuration, a driven member configured to engage the sheave, and a plurality of drive members configured for radial movement to selectively engage the driven member. The transmission may be operable in one or more of the following modes: traction mode, integer mode, IN mode, and infinite mode.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 4, 2014
    Inventors: Gary Lee, Steven Aposhian, Eric Aston, Brian Barnum, Regis David, William Decker, Isaac Jones, Andrew Orme
  • Publication number: 20140235381
    Abstract: Among V-faces (48) of a pulley (15), a portion (48a) that is radially further inside than a predetermined position P1 is susceptible to slip against a metal belt (19), but making a shape of the generatrix of the portion (48a) on the radially inner side into a straight line enables a large coefficient of friction against the metal belt (19) to be ensured, thereby reliably preventing slip from occurring. Furthermore, by making, among the V-faces (48) of the pulley (15), a shape of the generatrix of a portion (48b) that is radially further outside than the predetermined position P1 into a curved line that curves in a direction that compensates for misalignment (C) of the metal belt (19) ensures that the metal belt (19) smoothly bites into the V-faces (48), thereby enabling the durability of the metal belt (19) or the pulley (15) to be enhanced.
    Type: Application
    Filed: September 28, 2011
    Publication date: August 21, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Toru Yagasaki
  • Patent number: 8795110
    Abstract: A disk set arrangement for a chain-CVT having a function-optimized disk set surface contour. The CVT includes a first drive disk set and a second driven disk set, wherein the disk sets of the disk set arrangement in each case include two disks mounted on respective shafts. One disk of each of the disk sets can be displaced axially relative to an opposed axially fixed disk. An endless chain arrangement with rocker pressure pieces is operative between the disk sets to transmit torque. The rocker pressure pieces have longitudinal axes that extend parallel to the rotational axes of the shafts, and include outer axial ends that contact the contoured disk surfaces.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: August 5, 2014
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Thomas Endler, Nicolas Rickling
  • Patent number: 8798877
    Abstract: A control device of a continuously variable transmission for a vehicle has a pair of variable pulleys and a transmission belt, and the control device respectively controls input-side and output-side thrust forces of input-side and output-side variable pulleys to set an actual gear ratio to a target gear ratio, prevents a slip of the transmission belt, and determines a lowest-speed-side gear ratio. When it is determined that a detection value of a rotation speed for calculating the actual gear ratio does not reflect an actual rotation speed, target input-side and output-side thrust forces are set to be target thrust forces for maintaining the lowest-speed-side gear ratio and preventing the slip of the transmission belt, and based on whether the actual gear ratio is already the lowest-speed-side gear ratio, values of the input-side and output-side thrust forces are changed for obtaining the target thrust forces.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: August 5, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Ayabe, Shinya Toyoda, Kunio Hattori
  • Publication number: 20140187366
    Abstract: In a V-belt type continuously variable transmission for utility vehicle, a transmission case assembly covering a drive pulley assembly and a driven pulley assembly is provided, the transmission case assembly includes a transmission case main body, and a transmission cover attached to a cover attachment surface of the transmission case main body, the cover attachment surface is inclined with respect to a vertical plane which is orthogonal to a crankshaft, and the transmission cover is attached to the cover attachment surface by a plurality of bolts removed and inserted in the direction orthogonal to the cover attachment surface.
    Type: Application
    Filed: December 28, 2012
    Publication date: July 3, 2014
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Yuji KOUMA, Seiji ITOO, Taisuke MORITA
  • Publication number: 20140187365
    Abstract: A V-belt type continuously variable transmission includes a drive shaft, a drive pulley assembly, a driven shaft, a driven pulley assembly, a V belt, and a transmission case assembly, the drive shaft is formed as a separate body from the crankshaft, one axial end of the drive shaft is spline-fitted to a shaft coupling portion provided in an end of the crankshaft, freely move in the axial direction within a predetermined distance, and be permitted to fall slightly, and the other axial end of the drive shaft is supported in the transmission case assembly or via a front bearing.
    Type: Application
    Filed: December 28, 2012
    Publication date: July 3, 2014
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Yuji KOUMA, Taisuke MORITA, Seiji ITOO
  • Patent number: 8738246
    Abstract: In an apparatus for controlling a CVT that transmits power of an engine to driven wheels with hydraulic clamping pressure supplied from a hydraulic mechanism to clamp the belt from laterally-sided pulleys, it is determined whether the ABS operation of the ABS mechanism (to reduce braking force to be applied to the driven wheels when the driven wheels are locked) is delayed, and set hydraulic clamping pressure is increased when the ABS operation is determined to be delayed, while the set clamping pressure is maintained as it is when the operation of the ABS mechanism is determined to be not delayed.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: May 27, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuichiro Takemori, Yuzo Okubo, Masatoshi Noguchi
  • Publication number: 20140128187
    Abstract: A control device for a vehicle continuously variable transmission that includes: an input-side variable pulley of which an effective diameter is variable; an output-side variable pulley of which an effective diameter is variable; a transmission belt that is wound between the input-side variable pulley and the output-side variable pulley; and a check valve that, on the basis of a first pressure that is one of an input-side pressure applied to the input-side variable pulley and an output-side pressure applied to the output-side variable pulley, regulates a second pressure that is the other one of the input-side pressure and the output-side pressure includes: a control unit that, when the second pressure is regulated by the check valve, controls the first pressure on the basis of a pressure required to suppress a slip of the transmission belt and a pressure required to achieve a target speed ratio.
    Type: Application
    Filed: May 25, 2012
    Publication date: May 8, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Taira Iraha
  • Patent number: 8696499
    Abstract: A belt-type continuously variable transmission includes a primary sheave including a pair of first clamp surfaces, a secondary sheave including a pair of second clamp surfaces, and a belt endlessly wound between both of the primary and secondary sheaves. The belt includes contact surfaces clamped between the first clamp surfaces and between the second clamp surfaces. Powder having infusibility as a friction enhancing material is held on at least one of the first clamp surfaces of the primary sheave, the second clamp surfaces of the secondary sheave, and the contact surfaces of the belt.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: April 15, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yousuke Ishida, Masaru Oosuga
  • Publication number: 20140066239
    Abstract: The V-belt continuously variable transmission comprises a driving pulley and a driven pulley mounted on shafts, each of which pulleys consists of two half pulleys movable in a horizontal plane and provided with radial longitudinal through slots for enabling the half pulleys to mate (penetrate) one another, and a drive belt. Furthermore, each half pulley is in the form of a single component consisting of three solids of revolution with a common axis, which are interconnected as a single unit, two of said solids of revolution being different-sized hollow truncated cones oriented in different directions and connected by their smaller bases, and the third being a hub that is connected to the corresponding shall in such a way as to be able to move along the latter. The technical result of the claimed utility model is enhanced reliability and increased service life.
    Type: Application
    Filed: February 10, 2012
    Publication date: March 6, 2014
    Inventor: Mikhail Urievich Artamonov
  • Publication number: 20140031154
    Abstract: A belt-driven continuously variable transmission adapted to prevent a tilting motion of a sheave under high temperature. The belt-driven continuously variable transmission is comprised of a pair of pulleys individually comprised of a fixed sheave rotated integrally with a rotary shaft and a movable sheave fitted onto the rotary shaft while being allowed to reciprocate thereon, and a driving belt applied to the pulleys to transmit power therebetween. a stopper member is disposed on an outer circumferential side and in a side where the driving belt is not contacted with the movable sheave so as to prevent the movable sheave from being tilted to widen a width between the fixed sheave and the movable sheave holding the driving belt by a load from the driving belt.
    Type: Application
    Filed: March 31, 2011
    Publication date: January 30, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Michio Yoshida, Yuji Hattori, Tomoaki Yanagida, Kazunori Harima
  • Patent number: 8600634
    Abstract: A method is provided for controlling a normal force in a frictional contact of a continuously variable transmission including an input pulley and an output pulley where between an endless transmission element is arranged that is held between and in frictional contact with two pulley discs of each respective pulley under the influence of a respective normal force, wherein, as part the control method, the normal force at one pulley is actively oscillated, wherein a resulting oscillation of one of, or a ratio or difference between both of, a rotational speed of the input pulley and a rotational speed of the output pulley is determined and wherein at least one normal force is controlled in dependency on a correlation between the active oscillation and the resulting oscillation. The method includes a calibration step wherein a phase difference between the active oscillation and the resulting oscillation is determined.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 3, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Francis Maria Antonius Van Der Sluid, Erik Van Der Noll, Antonius Adrianus Helena Maria Van Dongen, Robert Godefridus Matheus Verscheijden
  • Publication number: 20130303316
    Abstract: A belt-driven continuously variable transmission includes a drive pulley, a driven pulley and a driving belt. Each pulley is formed by a fixed sheave integrated with a rotary shaft and a movable sheave fitted onto the rotary shaft in a slidable manner. A belt groove holding a driving belt is formed individually between conical surfaces of the fixed sheave and the movable sheaves being opposed to each other. The belt-driven continuously variable transmission changes a speed ratio continuously by altering an effective diameter of the driving belt by varying the groove width. A non-metallic belt made of resin material is used as the driving belt, and a friction coefficient of a radially inner region of each conical surface of driven pulley is smaller than that in a radially outer region.
    Type: Application
    Filed: February 3, 2011
    Publication date: November 14, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshinari Sano, Akira Ijichi, Tatsuya Saito
  • Patent number: 8579745
    Abstract: A control device for a belt type continuously variable transmission of a vehicle such as a motorcycle includes a first storage section for storing in advance reference correlation between a position of a movable flange and a detection value of a flange position detection sensor. A first processing section moves the movable flange to a position where its movement is restricted by a restriction section. A detection value of the flange position detection sensor is stored in a second storage section. A second processing section derives correlation between the position of the movable flange and the detection value of the flange position detection sensor based on the detection value of the flange position detection sensor stored in the second storage section and the reference correlation between the position of the movable flange and the detection value of the flange position detection sensor stored in the first storage section. A detection value of the flange position detection sensor is thereby calibrated.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: November 12, 2013
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Masaya Sakaue
  • Patent number: 8540596
    Abstract: An incrementally variable transmission machine with an input drive and an output drive which are linked by a drive chain, and which includes an oscillating cam arrangement which, at each of two limiting positions, can act on an actuating mechanism to vary the speed of the output drive by an increment.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: September 24, 2013
    Assignee: Varibox IP (Pty) Ltd.
    Inventor: Johannes Jacobus Naude
  • Publication number: 20130244819
    Abstract: An automated manual transmission apparatus for a vehicle, may include a shifting unit equipped with a plurality of shifting mechanisms that implement different gear ratios between an input shaft and an output shaft, and a continuous transmission mechanism that may be disposed between the output shaft and a power supply, wherein the continuous transmission mechanism selectively supplies power to the input shaft of the shifting unit and selectively transmits power from the power supply to the output shaft with a continuous transmission gear ratio.
    Type: Application
    Filed: January 9, 2013
    Publication date: September 19, 2013
    Applicant: Hyundai Motor Company
    Inventors: Soon Ki EO, Dong Soo Lee, Jong Yun Park
  • Patent number: 8534413
    Abstract: A continuously variable transmission (CVT) is provided for use on a recreational or utility vehicle. The CVT is electronically controlled by a control unit of the vehicle. The CVT includes a primary clutch having a first sheave and a second sheave moveable relative to the first sheave. An actuator may be positioned between the primary and secondary clutches.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: September 17, 2013
    Assignee: Polaris Industries Inc.
    Inventors: Stephen L. Nelson, Brian R. Gillingham, Urs Wenger, Brian D. Krosschell, Beat Kohler, Ronald Zurbruegg, Donald E. Frost
  • Patent number: 8512181
    Abstract: A power unit including an internal combustion engine with a crankshaft and a power transmission system. The power transmission system being equipped with a belt-type continuously variable transmission having a drive shaft and a driven shaft. The belt-type continuously variable transmission being disposed below the axis of the crankshaft wherein the torque from the crankshaft is transmitted to the drive shaft for rotating the crankshaft and the drive shaft rotate in opposite directions. An output shaft, linked and interlocked with the driven shaft via a gear transmission system, is disposed above the continuously variable transmission. A gear transmission mechanism includes a single idle shaft, which has an axis parallel to the crankshaft, and being arranged between the driven shaft and the output shaft for rotating the driven shaft and the output shaft in the same direction.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 20, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Toshimasa Mitsubori, Erika Hara
  • Patent number: 8506432
    Abstract: A stationary pulley (66) includes a pressing pulley (68) having a stationary pulley surface (66a) and also includes a support pulley (70) having a rotating shaft (15) fixed to the center section of the support pulley. The support pulley (70) is placed so as to face a movable pulley surface (14a) across the pressing pulley (68) in the direction of the axis of the rotating shaft (15), and the support pulley (70) supports an outer peripheral section (68b) of the pressing pulley (68) so as to restrain axial movement of the outer peripheral section (68b). The pressing pulley (68) has an inner peripheral section (68c) axially movable relative to the rotating shaft (15) and can transmit torque to the rotating shaft (15).
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: August 13, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenichi Yamaguchi, Ichiro Aoto, Ichiro Tarutani
  • Patent number: 8491426
    Abstract: A continuously variable transmission for motor vehicles is provided with a driving pulley (1) and with a driven pulley (2) around which is arranged a drive belt (3) which, at least when the transmission is operating, is clamped between two substantially conical pulley sheaves (4, 5) of the two pulleys (1, 2). The cone surface (10) of the pulley sheaves (4, 5) of the driving pulley (1) in a cross-section including the central pulley axis (9) is provided with a convex curvature having a radius of curvature (R10) that decreases in radially outward direction and the cone surface (10) of the pulley sheaves (4, 5) of the driven pulley (2) in a cross-section including the central pulley axis (9) is provided with a convex curvature having a radius of curvature (R10) that increases in radially outward direction.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: July 23, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Arjan Van Der Leest
  • Publication number: 20130178316
    Abstract: A belt-type continuously variable transmission for a vehicle includes: a primary pulley including a first fixed sheave fixed to an input shaft, and a first movable sheave relatively non-rotatable and relatively movable in axial direction to the input shaft due to spline-fitting of a female spline formed on an inner circumferential portion thereof to a male spline formed on the input shaft; a secondary pulley including a second fixed sheave fixed to an output shaft in parallel with the input shaft, and a second movable sheave relatively non-rotatable and relatively movable in the axial direction to the output shaft due to spline-fitting of a female spline formed on an inner circumferential portion thereof to a male spline formed on the output shaft; and a transmission belt wound around a V-shaped first pulley groove formed between the first fixed sheave and the first movable sheave and a V-shaped second pulley groove formed between the second fixed sheave and the second movable sheave, the female spline formed
    Type: Application
    Filed: September 15, 2010
    Publication date: July 11, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masanori Kadokawa
  • Publication number: 20130157793
    Abstract: This disclosure generally includes description of a secondary driven clutch system for a continuously variable transmission. The secondary driven clutch system may be coupled adjacent a shaft that is rotatable about a longitudinal axis. The system may include a movable sheave including a slot, where the movable sheave may be movable closer to or further from a stationary sheave along the longitudinal axis. The slot may be generally at an angle from the longitudinal axis and configured to reduce the longitudinal force needed to move the moveable sheave along the shaft along the longitudinal axis, as compared to a slot generally parallel to the longitudinal axis.
    Type: Application
    Filed: December 16, 2011
    Publication date: June 20, 2013
    Inventor: Andrzej Dec
  • Publication number: 20130157794
    Abstract: This disclosure generally includes description of a clutch for a continuous variable transmission (CVT), more particularly to the drive clutch of a CVT for immovably coupling a spider portion to a CVT shaft during reverse rotation or acceleration or deceleration of the CVT shaft.
    Type: Application
    Filed: September 14, 2012
    Publication date: June 20, 2013
    Applicant: The Gates Corporation
    Inventors: Oliver Stegelmann, Barry James Jackson
  • Publication number: 20130150190
    Abstract: Four types of pulley sheaves are common with one another in that each includes a pulley forming body having a tubular portion inserted around the corresponding shaft and a main body portion extending radially outward from one side of the tubular portion in an axis line direction, the main body portion including a conical friction surface inclined to be positioned closer to the other side of the tubular portion in the axis line direction, from an inner side to an outer side in a radial direction. The tubular portion of the pulley forming bodies that forms the driving-side and driven-side fixed pulley sheaves includes a fixing hole, while the tubular portion of the pulley forming bodies that forms the driving-side and driven-side movable pulley sheaves includes a sliding slot that allows the tubular portion to move along the axis line of the corresponding shaft only within the predetermined distance.
    Type: Application
    Filed: July 11, 2012
    Publication date: June 13, 2013
    Inventors: Fumitoshi ISHINO, Shigeaki NAKAGAWA
  • Patent number: 8459397
    Abstract: A work vehicle having drive wheels includes: an engine having an output shaft oriented in a transverse direction of a vehicle body; a transmission having an input shaft oriented in the transverse direction, which includes a transmission case arranged next to the engine in a front-rear direction of the vehicle body; and a CVT which extends between a lateral side of the engine and a lateral side of the transmission case and is configured to transmit a driving force from the output shaft to the input shaft. A connecting plate is configured to connect an upper part of the engine and an upper part of the transmission case and has a cover part. An electric component is disposed in a space defined by the engine, the transmission case and the connecting plate and is covered by the cover part from above.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: June 11, 2013
    Assignee: Kubota Corporation
    Inventors: Hiroki Bessho, Shoichiro Kawamura, Koji Fujiwara, Masatake Murakawa
  • Publication number: 20130109515
    Abstract: A chain is formed by coupling chain elements including plate-shape links arranged in the width direction of the chain and pins (42) extending through the links in the width direction of the chain, in the circumferential direction of the chain. The pin (42) is clamped between two opposing substantially conical surfaces 24 and 26 of a pulley (12). The deformation ratio of the pin length when the pin is clamped by the pulley is set to be 1.3×10?6 (1/N) or greater. The deformation ratio of the pin length is represented by (deformation ratio)=?L/(F×L), wherein L indicates a length of the pin, F indicates a load applied to the pin, and ?L indicates a deformation quantity. Thus, noise of a chain-type continuously variable transmission in the frequency band of 3 to 5 kHz can be reduced.
    Type: Application
    Filed: October 30, 2012
    Publication date: May 2, 2013
    Applicant: JTEKT CORPORATION
    Inventor: JTEKT CORPORATION
  • Patent number: 8425355
    Abstract: A belt-type continuously variable transmission includes a primary sheave including a pair of first clamp surfaces, a secondary sheave including a pair of second clamp surfaces, and a belt endlessly wound between both of the primary and secondary sheaves. The belt includes contact surfaces clamped between the first clamp surfaces and between the second clamp surfaces. Powder having infusibility as a friction enhancing material is held on at least one of the first clamp surfaces of the primary sheave, the second clamp surfaces of the secondary sheave, and the contact surfaces of the belt.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: April 23, 2013
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yousuke Ishida, Masaru Oosuga
  • Patent number: 8425207
    Abstract: The present invention provides a motor driven air compressor and hydraulic pump module that makes it possible to adjust the operational speed of the air compressor in accordance with the operational conditions of the air compressor, prevent shock and water from being produced in an air pipe connected to the air compressor by preventing sudden connection/disconnection of torque transmitted from the motor to the air compressor, by using a continuously variable transmission, thereby improving durability of the motor and the air compressor.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: April 23, 2013
    Assignee: Hyundai Motor Company
    Inventor: Donggeun Lee
  • Publication number: 20130092468
    Abstract: A continuously variable transmission (CVT) is provided for use on a recreational or utility vehicle. The CVT is electronically controlled by a control unit of the vehicle. The CVT includes a primary clutch having a first sheave and a second sheave moveable relative to the first sheave. An actuator may be positioned between the primary and secondary clutches.
    Type: Application
    Filed: February 17, 2012
    Publication date: April 18, 2013
    Applicant: Polaris Industries Inc.
    Inventors: Stephen L. Nelson, Brian R. Gillingham, Urs Wenger, Brian D. Krosschell, Beat Kohler, Ronald Zurbruegg, Donald E. Frost
  • Publication number: 20130081500
    Abstract: A speed control mechanism for controlling selective engagement of the self-propelled transmission assembly for a walk-behind lawn mower is provided. The speed control mechanism is also configured to control the relative output speed of the transmission assembly. The speed control mechanism includes a speed engagement assembly and a speed adjustment assembly, wherein the speed engagement assembly includes a pair of rotatable levers for causing the transmission assembly to actuate between a disengaged position and an engaged position and the speed adjustment assembly includes a rotatable knob for causing the relative output speed of the transmission assembly to the wheels of the lawn mower to increase or decrease.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 4, 2013
    Applicant: MTD PRODUCTS INC.
    Inventors: Philip Helin, Rick Baehr
  • Publication number: 20130079182
    Abstract: A method of manufacturing a pulley system includes spin-forming metal to form an annular wall of a sheave, pressing powdered metal to form a hub of the sheave, and fastening together the annular wall and the hub.
    Type: Application
    Filed: September 21, 2012
    Publication date: March 28, 2013
    Applicant: Briggs & Stratton Corporation
    Inventor: Briggs & Stratton Corporation
  • Publication number: 20130079183
    Abstract: A power transmission chain includes a plurality of links respectively having front and rear insertion parts into which pins are inserted, a plurality of first pins and a plurality of second pins which are arranged in front and back for connecting the links A plurality of the links includes two types of the links having different pitch lengths, wherein provided that a radius of a pulley shaft is RA, a radius of curvature of a face of the link having a shorter pitch length at an inner diameter side of the chain is RS, and a radius of curvature of a face of the link having a longer pitch length at an inner diameter side of the chain is RL, relation is set to be RA?RS?1.5 RA, and RS<RL.
    Type: Application
    Filed: November 20, 2012
    Publication date: March 28, 2013
    Applicant: JTEKT Corporation
    Inventor: JTEKT Corporation