Fluid Pressure Actuator For Adjustment Of Member Patents (Class 474/28)
  • Patent number: 10830160
    Abstract: A device for controlling the compression rate of a variable compression ratio engine comprises: an actuating cylinder comprising a piston defining two chambers for receiving a pressure fluid, a pressure accumulator supplying the pressure fluid, a first fluid circuit connecting the upper chamber to the accumulator and comprising a first valve assembly for controlling the flow of the fluid in the first fluid circuit, and a second fluid circuit connecting the lower chamber to the accumulator and comprising a second valve assembly for controlling the flow of a fluid in the second fluid circuit. At least one of the fluid circuits comprises a bypass conduit arranged so as to connect one of the chambers to the accumulator. The bypass conduit comprises a non-return valve.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: November 10, 2020
    Assignee: MCE 5 Development
    Inventors: Sylvain Bigot, Benjamin Teyssier, François Besson
  • Patent number: 10767761
    Abstract: A control apparatus for a vehicle driving apparatus includes: a first-operating-state determining portion configured to determine whether the driving apparatus is in a first operating state, by determining (i) whether a first drive-force transmitting path is established to cause a drive force to be transmitted through a gear mechanism and (ii) whether there is a probability of generation of noises between an input shaft and an continuously-variable transmission; and a belt-clamping-force controlling portion configured to control a belt clamping force of the continuously-variable transmission, when it is determined that the driving apparatus is in the first operating state, to start execution of a belt-clamping-force increasing control for increasing the belt clamping force such that the belt clamping force is made larger when the driving apparatus is in the first operating state than when the driving apparatus is in an operating state that is different from the first operating state.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: September 8, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tomomatsu, Tomohiro Kondo, Kyohei Suzumura, Jun Hakamagi
  • Patent number: 10724619
    Abstract: The present invention relates to a transmission for a vehicle, and more particularly, to a compound transmission of combining a differential gear and a continuously variable transmission, which transmits power through the differential gear and a transmission gear at a low speed and transmits the power through the continuously variable transmission and the differential gear at a high speed. According to the present invention, the shifting is performed through the differential gear unit at a low stage requiring large torque and low rpm and performs the shifting through the continuously variable transmission at a high stage requiring relatively small torque and high rpm to provide optimum shifting efficiency by collecting only advantageous of the respective units.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: July 28, 2020
    Assignee: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES
    Inventors: Chol Woo Lee, Yong Chan Cho, Chan Hee Park
  • Patent number: 10690245
    Abstract: A control system and method for controlling a continuously variable transmission in a vehicle propulsion system includes measuring a speed ratio of the continuously variable transmission, determining whether the measured speed ratio is drifting away from a commanded speed ratio, and adjusting the commanded speed ratio to a value that is different than a desired speed ratio if the measured speed ratio is drifting away from the commanded speed ratio.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: June 23, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Hari C Perla, Joseph W Tatangelo, Paul G Otanez, Alexander J Severt, Virinchi Mallela
  • Patent number: 10661804
    Abstract: A propulsion system, control system, and method use model predictive control systems to generate a plurality of sets of possible command values and determine a cost for each set of possible command values. The set of possible command values that has the lowest cost is determined and defined as a selected set of command values. In some circumstances, the MPC-determined command value may be replaced by another transmission ratio command based on override inputs. Minimum and maximum transmission ratios are determined based on the override inputs, and a constrained (or arbitrated) transmission ratio is determined therefrom. The constrained or arbitrated transmission ratio is used to determine whether to apply an MPC-determined transmission ratio or a transmission ratio based on the arbitrated transmission ratio to determine an ultimate commanded transmission ratio. Pressure(s) are commanded to a transmission pulley assembly, which is configured to implement the ultimate commanded transmission ratio.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: May 26, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Paul G. Otanez, Michael Livshiz, Christopher J. Weingartz, Cole Reinhold, Michael T. Sarzynski, Mateusz M. Nowak, Bharath Pattipati
  • Patent number: 10626989
    Abstract: A hydraulic control device where the engagement pressure which is supplied from the first solenoid valve is supplied to the synchronization mechanism in the case where the signal pressure is not supplied to the switching valve, and the engagement pressure which is supplied from the first solenoid valve is supplied to the engagement element and the source pressure is supplied to the synchronization mechanism as the engagement pressure in the case where the signal pressure is supplied to the switching valve.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: April 21, 2020
    Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kenichi Tsuchida, Toshiaki Hayashi, Masafumi Takasu, Yuta Seriguchi, Masashi Takizawa, Syuji Moriyama, Takafumi Inagaki, Yoshinobu Soga, Yoshihiro Mizuno, Hiromitsu Nitani
  • Patent number: 10570998
    Abstract: A continuously variable transmission 1 includes: a primary pulley 20 including a nipping groove 22 receiving a V belt 12 wound across pulleys, the primary pulley 20 including a fixed half pulley 21 having a back side, opposite to the nipping groove 22, provided with a hollow part S; and a reinforcing member 41 having a center hole receiving a driving shaft 11 and tapering from an outer circumference side toward an inner circumference side to have an annular conical shape. The reinforcing member 41 has an outer circumference side end portion 41a brought into contact with and attached to an outer circumference side end surface Sa of the hollow part S and has an inner circumference side end portion 41b attached to an inner circumference side end surface Sb of the hollow part S via a holding member 42 having a wedge-shaped cross section.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: February 25, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Toshiki Miyajima
  • Patent number: 10550938
    Abstract: A hydraulic pressure controller includes belt sandwiching force increasing means. The belt sandwiching force increasing means increases a belt sandwiching force by a primary pulley and a secondary pulley on the basis of a braking force request from a driver, up to a predetermined value to prevent a belt from slipping due to a braking force. The belt sandwiching force increasing means increases the belt sandwiching force in a range of less than the predetermined value before the braking force request occurs.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: February 4, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Hiroki Iwasa, Hironori Miyaishi, Tetsuya Izumi
  • Patent number: 10364887
    Abstract: Control system for a Continuously Variable Transmission with two pairs of conical sheaves each with an adjustable running radius, the sheave of each pair being coupled to a hydraulic actuator and the inlet port of each actuator being connected with the hydraulic actuator setting means, fed from the outlet port of a hydraulic displacement pump, connected to a supply of hydraulic medium and coupled to an electric motor which is controlled by a controller which controls the speed of the electric motor with a first control signal which is generated as a function of the actual transmission ratio of the transmission on one hand and of the desired speed of change of this transmission ratio on the other hand, all this in such a way that the speed of this first motor increases with an increase of the transmission ratio of the transmission on one hand and an increase of the speed of change of the ratio on the other hand, while the outlet port of the displacement pump is connected to the inlet of an electronically contr
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: July 30, 2019
    Assignee: Punch Powertrain NV
    Inventors: Jacobus Hubertus Maria Van Rooij, Johan Francis Anne Jesse Thoolen
  • Patent number: 10352420
    Abstract: A continuously variable transmission is configured wherein an outer diameter of a first pulley 11 is smaller than an outer diameter of a second pulley 12, a first input shaft 1? and a second input shaft 2? have a parallel coaxial structure, the first input shaft 1? and a first output shaft 14 are linked via a LO clutch 3? and a first transmission gear assembly 8; and the second input shaft 2? and a second output shaft 15 are linked via a HI clutch 3? and a second transmission gear assembly 9. In-low-speed mode, a drive torque outputted from the second pulley 12 is transmitted to a differential via the second transmission gear assembly, a second low-speed gear 23, and a low final gear 16, whereas in high-speed mode, a drive torque outputted from the first pulley is transmitted to the differential via a high final gear 18.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: July 16, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Keisuke Hisada, Atsushi Kobayashi
  • Patent number: 10240672
    Abstract: When a switch condition where a shift of a continuously variable transmission is switched from a first shift that is any one of an upshift and a downshift to another second shift is satisfied, an integral term in the feedback control of the first shift is reduced to zero with a first predetermined gradient, an operation of an integral term in the feedback control of the second shift is started after the switch condition is satisfied and before the integral term in the feedback control of the first shift reaches zero, and the continuously variable transmission is shifted based on a sum of the integral term in the feedback control of the first shift and the integral term in the feedback control of the second shift.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: March 26, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Hiroki Iwasa, Ryu Sungpil, Hironori Miyaishi, Tetsuya Izumi
  • Patent number: 10197157
    Abstract: A continuously variable transmission (CVT) for a vehicle includes an input member, an output member and a variator assembly including a first pulley rotatably coupled to the input member and a second pulley rotatably coupled to the output. The first and second pulleys are rotatably coupled by a flexible continuous rotatable device. A control system is provided including an instruction set executable to determine an initial variator speed ratio of the variator assembly and detect an event causing a change in an operational state of the vehicle. The control system determines a compensation strategy to adjust the variator speed ratio in response to the change in the operational state of the vehicle and generates an adjusted variator speed ratio based upon the compensation strategy. The control system transmits the adjusted variator speed ratio to the variator assembly.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: February 5, 2019
    Assignee: GM Global Technology Operations LLC
    Inventors: Crystal J. Nassouri, Craig J. Hawkins, Alexander S. Barath
  • Patent number: 10167936
    Abstract: A CVT transmission including a start-up element, a variator, and a direct-shift stage for switching between a first operating range (low) and a second operating range (high). A maximum transmission ratio of the second operating range (high) corresponds to a minimum transmission ratio of the first operating range (low). The transmission ratio ranges are arranged so that the marginal variator transmission ratio ranges, which constitute low-efficiency ranges, are not used.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: January 1, 2019
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Bernhard Walter
  • Patent number: 10138986
    Abstract: Provided is a continuously variable transmission that uses friction clutches as power transmission switching mechanisms but without increasing the number of shafts and the overall length. The power transmission switching mechanisms are configured to switch between establishing and interrupting power transmission in the power transmission paths within the continuously variable transmission. A continuously variable transmission includes an input shaft, a first output shaft, a second output shaft, a continuously variable transmission device, and four friction clutches. The continuously variable transmission device includes, a first pulley, mounted to the first output shaft, a second pulley, mounted to the second output shaft, and an endless belt, looped around the first pulley and the second pulley. A first friction clutch and a second friction clutch are coaxial with the input shaft. A third friction clutch is coaxial with the second output shaft. A fourth friction clutch is coaxial with the first output shaft.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: November 27, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Satoshi Uchino
  • Patent number: 10125866
    Abstract: A transmission variator includes a first pulley rotatably attached to an intermediate member of a geartrain, and a second pulley rotatably attached to an output member that is rotatably coupled to the driveline. The geartrain includes an input member, a planetary gear set, a first clutch, a second clutch and an intermediate member. The second clutch is a low drag clutch. The input member rotatably couples to the prime mover. A controller includes an instruction set that is executable to activate only the first clutch in response to a request to operate the driveline in a forward direction, and activate only the second clutch in response to a request to operate the driveline in a reverse direction.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: November 13, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Chengwu Duan, Farzad Samie, Chunhao J. Lee, Jian Yao
  • Patent number: 10107394
    Abstract: A control device for a continuously variable transmission with an auxiliary transmission includes: a cooperative control section; and a depression shift control section, wherein when an actual transmission gear ratio of the variator at the judgment of the depression shift control is higher than a first transmission gear ratio set as a lowest value of a control of the transmission gear ratio, the depression shift control section configured to downshift the variator, and to set a target transmission gear ratio at the shift of the variator to a second transmission gear ratio which is a restriction value that is higher than the first transmission gear ratio.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: October 23, 2018
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Mamiko Inoue, Takuichiro Inoue, Hiroyasu Tanaka
  • Patent number: 10041509
    Abstract: A hydraulic device wherein an orifice is provided upstream of the discharge valve in an oil passage from the electric pump, a drain oil passage from the second hydraulic servo communicates between the orifice and the discharge valve in the oil passage from the electric pump, and an oil pressure in the oil passage upstream of the orifice is maintained at a predetermined pressure higher than the set pressure.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: August 7, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Nobuyuki Hirai, Masamichi Yamaguchi, Yoshimitsu Hyodo, Kenichi Tsuchida, Naoyuki Fukaya
  • Patent number: 10024427
    Abstract: A method and system for controlling a ratio of a continuously variable transmission coupling a prime mover to a driven member in a vehicle. The method includes determining a current ratio of the continuously variable transmission, determining a projected ratio from a first ratio path of a predetermined ratio map, calculating a gradient between the current ratio and the projected ratio, determining whether the calculated gradient satisfies a gradient constraint, setting a control ratio to the projected ratio if the calculated gradient satisfies the gradient constraint, setting a control ratio to a modified ratio if the calculated gradient does not satisfy the gradient constraint, the modified ratio being based upon a ratio that satisfies the gradient constraint, and controlling the ratio of the continuously variable transmission to the control ratio.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: July 17, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: James M Gessner, Christopher J Weingartz, John E Marano, Cole Reinhold
  • Patent number: 10006527
    Abstract: A variable transmission includes an input shaft, a planetary gear set drivingly engaged with a variator comprising, a variator carrier assembly, a first ring assembly, and a second ring assembly; and the output shaft, arranged with various combinations of brakes and clutches to produce transmissions with continuously variable or infinitely variable torque output ratios.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: June 26, 2018
    Assignee: Dana Limited
    Inventors: Mark R. J. Versteyhe, Matthias W. J. Byltiauw, James F. Ziech
  • Patent number: 9964207
    Abstract: A transmission controller increases hydraulic pressure supplied to a secondary pulley and decreases hydraulic pressure supplied to a primary pulley to shift a variator to a mechanical Low speed ratio during the hydraulic pressure supplied to the primary pulley and the secondary pulley vibrates. The mechanical Low speed ratio is a speed ratio where a groove width of the primary pulley has a maximum value possible to be employed in structure of the primary pulley.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: May 8, 2018
    Assignees: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Kunihiro Takahashi, Tetsuya Izumi, Masayuki Miyazono, Takuichiro Inoue, Masashi Suwabe, Makoto Komatsu, Yuji Okamoto
  • Patent number: 9890853
    Abstract: A hydraulic control device has: a modulator valve using oil pressure from a hydraulic source for adjusting a modulator pressure; driving and driven-side hydraulic actuator control valves controlling hydraulic oil from the source to driving and driven-side hydraulic actuators; a driving-side control oil pressure adjusting electromagnetic valve using the modulator pressure for outputting a control oil pressure controlling the driving-side control valve; and a driven-side control oil pressure adjusting electromagnetic valve for outputting a control oil pressure controlling the driven-side control valve, the hydraulic control device including a failsafe valve switched from a normal to a failure position based on a failure disabling electric control for the driving-side and driven-side electromagnetic valves, the modulator valve making the modulator pressure lower than a value at the normal position based on an output switching pressure generated due to switching the failsafe valve from the normal to the failure p
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: February 13, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shuji Moriyama, Yoshinobu Soga, Yoshihiro Mizuno, Hiromitsu Nitani, Takafumi Inagaki, Kenichi Tsuchida, Toshiaki Hayashi, Yuta Seriguchi, Masafumi Takasu, Yoichiro Kimura, Masashi Takizawa
  • Patent number: 9890857
    Abstract: A continuously variable transmission (CVT) includes an input member, an output member, a variator assembly having a primary variator pulley operable for receiving an input torque via the input member, a secondary variator pulley operable for transmitting an output torque via the output member, and an endless rotatable drive element in frictional engagement with the primary and secondary variator pulleys, first and second speed sensors operable for measuring a respective rotational speed of the primary and secondary variator pulleys, and a controller. The controller executes a method to detect gross slip of the endless rotatable drive element with respect to the primary and secondary variator pulleys using the measured rotational speeds, and in response to the detected gross slip, to request a reduction in the input torque by a calculated amount over a calibrated duration until a level of the detected gross slip reaches a calibrated slip level.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: February 13, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Bret M. Olson, Ronald W. VanDiepen, Paul G. Otanez
  • Patent number: 9874269
    Abstract: In a continuously variable transmission, driving force from a drive source is transmitted via the path: first input switching mechanism?first input path?first countershaft?first pulley?endless belt?second pulley?second countershaft?first output path?second input shaft?first output switching mechanism?output shaft to thus establish a LOW mode. A large torque that is transmitted in the LOW mode passes through the first output switching mechanism, but since the second input shaft is relatively rotatably disposed on the outer periphery of the first input shaft and the first output switching mechanism is disposed on the second input shaft, it is possible to enhance the rigidity of the input shaft due to the double tube structure formed from the first input shaft and the second input shaft and to support the first output switching mechanism with high rigidity without carrying out special reinforcement.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: January 23, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Satoshi Uchino, Atsushi Fujikawa
  • Patent number: 9851004
    Abstract: A method of controlling a variator that requires clamping pressure between a first component and a second component to transfer torque therebetween, such as a continuously variable transmission, includes calculating a theoretical clamping pressure, and multiplying the theoretical clamping pressure by a multiplier to define a commanded clamping pressure. The multiplier includes a value that is variable between a minimum multiplier value and a maximum multiplier value. The value of the multiplier is based on current operating conditions of the variator. The commanded clamping pressure is applied to the first component and the second component to generate friction and transfer torque between the first component and the second component.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: December 26, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Zhen J. Zhang, Jesse B. Bradley, Joseph B. Burtch, John E. Marano
  • Patent number: 9816610
    Abstract: Control system for a continuously variable transmission with a first and a second pair of conical sheaves each with adjustable running radius, in which of each pair at least one sheave (14a, 14b) is coupled to a first and a second hydraulic actuator (20a, 20b) respectively which sets the axial sheave position in dependence of the amount of hydraulic medium supplied thereto, in which the actuators are connected with means to supply and discharge thereto/therefrom respectively, hydraulic medium, and one actuator is connected to a source of hydraulic pressure medium, and in which furthermore the first and second actuator respectively is connected with a first and second control chamber (60, 124) respectively, filled with hydraulic medium and having a variable control volume, in such a way that an increase of the first control volume is coupled to a decrease of the second control volume, and vice versa.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: November 14, 2017
    Assignee: Punch Powertrain NV
    Inventors: Jacobus Hubertus Maria Van Rooij, Wilhelmus Petrus Maria Schaerlaeckens
  • Patent number: 9777815
    Abstract: A front wheel drive or rear wheel drive continuously variable transmission is provided having an input shaft, an output shaft, a continuously variable tilting ball planetary variator, a compound planetary gearset assembly having first, second, third, and fourth rotating elements, and a plurality of torque transmitting devices. The compound planetary gearset assembly has a simple single pinion gearset and a compound double pinion gearset, having fixedly connected planetary carriers and fixedly connected ring gears, creating a joint planetary gear carrier and joint ring gear. The outer planetary gears engage the ring gear which drives the output shaft. Selective torque transmitting devices include clutches and braking clutches.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: October 3, 2017
    Assignee: Dana Limited
    Inventor: Andrew W. Phillips
  • Patent number: 9777835
    Abstract: A system includes a continuously variable transmission having a primary pulley assembly configured to receive power and a primary oil chamber coupled to the primary pulley assembly such that a pressure of oil within the primary oil chamber is applied to the primary pulley assembly. The continuously variable transmission also includes a secondary pulley assembly and a drive belt configured to transfer power from the primary pulley assembly to the secondary pulley assembly. The system also includes a pressure sensor coupled to the primary oil chamber and configured to detect a pressure of the oil within the primary oil chamber. The system also includes an electronic control unit coupled to the pressure sensor and configured to determine whether the continuously variable transmission is set to the maximum gear ratio based on the detected pressure of the oil within the primary oil chamber.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: October 3, 2017
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventor: Andrew G. Sata
  • Patent number: 9664278
    Abstract: A control device for a vehicle includes a transmission mechanism capable of setting a fixed transmission gear ratio, a continuously variable transmission provided in parallel with the transmission mechanism, and a path switching mechanism for selectively blocking a torque transmission path that includes the transmission mechanism and that is configured to dampen vibration. The control device further includes a clutch mechanism where the continuously variable transmission and the transmission mechanism capable of setting constant transmission gear ratio are arranged in parallel between an input shaft and the output shaft, that selectively connects torque transmission path stretching from an internal combustion engine to drive wheels via transmission mechanism, and one clutch and other clutch are arranged in series, the other clutch is arranged on a relatively downstream side.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: May 30, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Mitsuhiro Toyoda, Hirofumi Nakada, Michio Yoshida, Daisuke Inoue, Atsushi Ayabe, Motonori Kimura, Akira Hino, Hiroki Kondo, Kenji Matsuo, Takuro Shimazu
  • Patent number: 9574654
    Abstract: A hydraulic control system for a CVT includes a pressure regulator subsystem, a ratio control subsystem, a torque converter control (TCC) subsystem, a clutch control subsystem, an electronic transmission range selection subsystem, and is enabled for automatic engine start/stop (ESS) functionality.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: February 21, 2017
    Assignee: GM Global Technology Operations, LLC
    Inventor: Philip C. Lundberg
  • Patent number: 9556956
    Abstract: A control unit comprises determining unit for determining whether or not a predetermined elapsed time condition is established after a shift has been performed to a specific gear position reached by engaging a specific frictional engagement element of a stepped transmission mechanism, and restricting unit for prohibiting the stepped transmission mechanism from performing a shift back to the specific gear position while allowing a continuously variable transmission mechanism to perform shifts so that an automatic transmission is controlled to a target speed ratio until the determining unit determines that the predetermined elapsed time condition is established.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: January 31, 2017
    Assignee: JATCO LTD
    Inventors: Mamiko Inoue, Hiroyasu Tanaka, Masato Mori
  • Patent number: 9541013
    Abstract: A method of limiting belt slip in a continuously variable transmission (CVT) of a vehicle. The CVT is operatively connected to an engine. The method includes determining a slip speed of a belt of the CVT, determining the accumulated energy based on the slip speed of the belt and an engine torque produced by the engine, and controlling the engine torque in an intervention mode when the accumulated energy is greater than a threshold energy. Controlling the engine torque in the intervention mode comprises controlling at least one of cycling the engine torque, and limiting the engine torque. Systems and vehicles for performing the method are also disclosed.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: January 10, 2017
    Assignee: BOMBARDIER RECREATIONAL PRODUCTS INC.
    Inventors: Jean-Philippe Gauthier, Roger Rioux, Maxime Desjardins-Goulet
  • Patent number: 9499350
    Abstract: A method operates a conveyor installation having a belt and at least one drive drum for driving the belt. The torque acting on the drive drum is controlled, in order to alter the speed of the belt, within a time window that is defined by a first rotational speed of the drive drum and a second rotational speed of the drive drum.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: November 22, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Wolf-Martin Rasenack
  • Patent number: 9441733
    Abstract: A transmission controller determines whether a shift is a kickdown, and when the shift is determined as the kickdown, the target line pressure is increased to a first target pressure corresponding to an input torque to a continuously variable transmission increased by the kickdown; the transmission controller then determines whether the line pressure has reached the first target pressure, and if determined that the line pressure has reached the first target pressure, the target line pressure is increased to a second target pressure higher than the first target pressure.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: September 13, 2016
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Tomoyuki Mizuochi, Hisao Nobu, Kenji Sakakibara, Takahiro Ikeda, Masayuki Shimizu
  • Patent number: 9334934
    Abstract: An input pulley, an output pulley, a belt wound across the pulleys, a hydraulic cylinder provided to the input pulley, and a hydraulic servo mechanism that controls an operation of the hydraulic cylinder are provided. The hydraulic servo mechanism includes: a valve chest facing an input side movable sheave; a servo spool slidably inserted in the valve chest, and switches an oil passage in communication with a hydraulic chamber of the hydraulic cylinder; and a feedback spool disposed in such a manner that one end comes into contact with the input side movable sheave a bearing disposed in between, and configured to switch the oil passage to maintain a slid position of the input side movable sheave at a position corresponding to a slid position of the servo spool.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: May 10, 2016
    Assignee: YANMAR CO., LTD.
    Inventors: Fumitoshi Ishino, Takeshi Ouchida, Terunobu Yoshioka, Koji Iwaki
  • Patent number: 9316239
    Abstract: A hydraulic control system in a continuously variable transmission (2) is provided with a pump (40) for supplying hydraulic fluid, a main line (41), a line pressure valve (V3), an auxiliary line (42) and a auxiliary pressure valve (V9). The line pressure valve (V3) being arranged to control a line pressure LP in the main line (41) by discharging a surplus of hydraulic fluid supplied by the pump (40) into the auxiliary line (42). The auxiliary pressure valve (V9) is arranged to variably control auxiliary pressure AP in the auxiliary line (41), preferably in dependence on the line pressure LP in the main line (41).
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: April 19, 2016
    Assignee: BOSCH TRANSMISSION TECHNOLOGY B.V.
    Inventor: Wilhelmus Johannes Maria Van Wijk
  • Patent number: 9212732
    Abstract: A target primary pressure and a target secondary pressure are set based on a speed ratio, a target line pressure as a target value of a line pressure is set to be a value obtained by adding an offset amount, as a positive value, to either one having a higher value out of the target primary pressure and the target secondary pressure, in at least a cross-point region as a region where an absolute value of a deviation, obtained by subtracting the target primary pressure from the target secondary pressure, is smaller than a predetermined deviation, and a primary pressure, a secondary pressure, and the line pressure are controlled to be the target primary pressure, the target secondary pressure, and the target line pressure, respectively.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: December 15, 2015
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Tomoyuki Mizuochi, Hisao Nobu, Kenji Sakakibara, Takahiro Ikeda, Masayuki Shimizu, Masami Sakai
  • Patent number: 9109694
    Abstract: A driving pulley for a CVT has a shaft, a fixed sheave mounted on the shaft, a first sleeve disposed around the shaft and being operatively connected to the shaft, a movable sheave mounted on the first sleeve, a second sleeve disposed around the first sleeve and being connected to the shaft, a spring biasing the movable sheave away from the fixed sheave, and a CVT chamber having an annular cross-section. The fixed and movable sheaves are adapted to receive a belt therebetween. The CVT chamber has at least one opening adapted for fluidly communicating the CVT chamber with a hydraulic fluid reservoir. Hydraulic pressure in the CVT chamber biases the movable sheave toward the fixed sheave. The CVT chamber has an inner wall formed by the first sleeve, an outer wall formed by the second sleeve, an outer end, and an inner end formed by the movable sheave.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: August 18, 2015
    Assignee: CONSORTIUM DE RECHERCHE BRP-UNIVERSITE DE SHERBROOKE S.E.N.C.
    Inventors: Eric Lafreniere, David Monfette, Roger Rioux
  • Patent number: 9046174
    Abstract: A coefficient of friction correction device for a belt-type continuously variable transmission is provided in which the coefficient of friction corrector calculates a coefficient of friction correction factor from the coefficient of friction calculated by the coefficient of friction calculator for a predetermined gear ratio and the default value of the coefficient of friction stored in the coefficient of friction map for the predetermined gear ratio, and uniformly corrects the default value of the coefficient of friction stored in the coefficient of friction map for each gear ratio using the coefficient of friction correction factor. This enables the default values of the coefficient of friction of all the coefficient of friction maps to be corrected by calculating just one coefficient of friction correction factor, and enables the reliability of the corrected default value of the coefficient of friction to be ensured.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: June 2, 2015
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Shigeru Kanehara, Atsushi Fujikawa
  • Publication number: 20150148158
    Abstract: A control device for an automatic transmission including a hydraulic actuator that is actuated on the basis of a hydraulic pressure supplied and a linear solenoid valve that controls the hydraulic pressure supplied to the hydraulic actuator on the basis of a driving current of a solenoid includes an ECU that executes current feedback control over a current value of the driving current that is flowed to the solenoid using at least a proportional term and an integral term on the basis of a deviation (?I) between a target current value (Itgt) and actual current value (Ir) of the solenoid such that the hydraulic pressure supplied to the hydraulic actuator becomes a target hydraulic pressure. The ECU increases a proportional gain (Kp) in the current feedback control as a fluid temperature (To) detected by a fluid temperature sensor increases.
    Type: Application
    Filed: July 25, 2013
    Publication date: May 28, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naofumi Nishida, Shinichi Ito
  • 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: 20150105194
    Abstract: An element for a metallic belt in a continuously variable transmission capable of reducing misalignment while ensuring friction force in a small diameter state is provided. An element 40 for a metallic belt in a belt-type continuously variable transmission has a structure in which a side edge of the element 40 of a metallic belt 7 that contacts a drive pulley 5 and a driven pulley 8 includes: a belt radial outer portion 46b that is located on a radial outer side of the metallic belt 7 and linearly shaped to follow a radial inner portion 11a as a constant-angle inclined generatrix portion; and a belt radial inner portion 46a that is located on a radial inner side of the metallic belt 7 and curved to taper inward in the belt radial direction to gradually increase an inclination angle.
    Type: Application
    Filed: July 6, 2012
    Publication date: April 16, 2015
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Soichiro Sumida, Toru Yagasaki
  • Patent number: 8998755
    Abstract: A vehicle powertrain has an engine, a driving shaft having a passage defined therein, a driven shaft, a pump, a hydraulic fluid reservoir, and a CVT. A driving pulley of the CVT includes a fixed sheave and a movable sheave disposed on the driving shaft for rotation therewith, a spring biasing a movable sheave away from the fixed sheave, and a CVT chamber fluidly communicating with the passage of the driving shaft. The pump supplies hydraulic fluid from the reservoir to the passage in the driving shaft. The hydraulic fluid flows from the passage to the CVT chamber to create a hydraulic pressure in the CVT chamber. The hydraulic pressure in the CVT chamber biases the movable sheave toward the fixed sheave.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: April 7, 2015
    Assignee: Consortium de Recherche BRP—Universite de Sherbrooke S.E.N.C.
    Inventors: David Monfette, Eric Lafreniere, Roger Rioux, Daniel Duceppe
  • Publication number: 20150080157
    Abstract: An element 40 for a metallic belt in a belt-type continuously variable transmission has a structure in which: a belt radial outer portion 46b of a metallic belt 7 is linearly shaped to come into line contact with a pulley radial inner portion 11a which is a constant-angle inclined generatrix portion of a pulley 5 or 8; a projecting portion 48 located below a locking edge portion 44a and extending inward in the belt radial direction is provided at each of the lower ends of both side edges of the element 40; and when the element 40 and a pulley radial outer portion 11b which is a curved generatrix portion of the pulley 5 or 8 contact each other, the projecting portion 48 bends inward in the axial direction of the pulley 5 or 8.
    Type: Application
    Filed: May 15, 2013
    Publication date: March 19, 2015
    Inventors: Soichiro Sumida, Toru Yagasaki
  • Publication number: 20140378251
    Abstract: An input pulley, an output pulley, a belt wound across the pulleys, a hydraulic cylinder provided to the input pulley, and a hydraulic servo mechanism that controls an operation of the hydraulic cylinder are provided. The hydraulic servo mechanism includes: a valve chest facing an input side movable sheave; a servo spool slidably inserted in the valve chest, and switches an oil passage in communication with a hydraulic chamber of the hydraulic cylinder; and a feedback spool disposed in such a manner that one end comes into contact with the input side movable sheave a bearing disposed in between, and configured to switch the oil passage to maintain a slid position of the input side movable sheave at a position corresponding to a slid position of the servo spool.
    Type: Application
    Filed: July 8, 2011
    Publication date: December 25, 2014
    Applicant: YANMAR CO., LTD.
    Inventors: Fumitoshi Ishino, Takeshi Ouchida, Terunobu Yoshioka, Koji Iwaki
  • Publication number: 20140371012
    Abstract: A hydraulic control device includes an electric pump configured to supply oil to a belt-type continuously variable transmission mechanism of a power transmission device through a hydraulic path based on driving of a motor, and an accumulator configured to accumulate oil inside by using the oil supplied by the electric pump and supplies the oil to a control system by discharging the accumulated oil through the hydraulic path. According to such a configuration, an increase in the sizes of the electric pump and the accumulator used for hydraulic control at the time of executing an idling stop function can be suppressed.
    Type: Application
    Filed: December 26, 2011
    Publication date: December 18, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shuji Moriyama, Takuro Morino, Yoshio Ito
  • Publication number: 20140357434
    Abstract: A hydraulic control system for a CVT includes a pressure regulator subsystem, a ratio control subsystem, a torque converter control (TCC) subsystem, a clutch control subsystem, and is enabled for automatic engine start/stop (ESS) functionality.
    Type: Application
    Filed: May 5, 2014
    Publication date: December 4, 2014
    Applicant: GM Global Technology Operations LLC
    Inventor: Philip C. Lundberg
  • Patent number: 8894521
    Abstract: A power transmission device includes a belt-type continuously variable transmission; a first fluid pressure cylinder; a second fluid pressure cylinder; a pressure-adjustment and pressure-feed device; a fluid outflow/inflow device; and a control unit that controls the pressure-adjustment and pressure-feed device based on a fluid pressure that is obtained from a thrust that is required for the second pulley in accordance with a driving state and that, by controlling the pressure-adjustment and pressure-feed device in this manner, controls the fluid outflow/inflow device such that a gear ratio is varied within a permitted gear ratio range in accordance with the fluid pressure that is pressure-fed from the pressure-adjustment and pressure-feed device in conjunction with the pressure adjustment.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: November 25, 2014
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazumichi Tsukuda, Syoichi Sayo, Ryoji Habuchi
  • Publication number: 20140342860
    Abstract: A continuously-variable transmission, which has a first pulley, which has a first fixed pulley and a first mobile pulley, a second pulley, which has a second fixed pulley and a second mobile pulley, and a drive force transmitting member, which is stretched between the first pulley and the second pulley, is provided, and this continuously-variable transmission has an indicated pressure calculation section, which calculates the indicated pressure of the first pulley, a stroke speed calculation section, which calculates the stroke speed of the first mobile pulley, and an oil pressure calculation section, which, when oil is discharged from an oil chamber, calculates the amount of increase of oil pressure in a first pulley oil chamber that increases compared to the indicated pressure due to the channel resistance of the discharge path, based on the channel resistance and the stroke speed, and a correction section, which, when oil is discharged from the first pulley oil chamber, subtracts the amount of increase of
    Type: Application
    Filed: November 12, 2012
    Publication date: November 20, 2014
    Inventors: Hideaki Suzuki, Yoshio Yasui, Yuuji Nagase, Fumito Shinohara
  • Publication number: 20140329628
    Abstract: A hydraulic control system for an automatic transmission, in which a belt is applied to at least one pair of pulleys, and in which widths of belt grooves of the pulleys, or pressures to clamp the belt by the pulleys are controlled by hydraulic pressures applied to hydraulic chambers of the pulleys. The hydraulic control system is comprised of: a control valve that controls a delivery and a drainage of hydraulic fluid to/from the hydraulic chamber; and a drive frequency setting means that determines a drive frequency of a drive signal for actuating the control valves in such a manner that a phase of a local maximum value of amplitude of the drive signal is shifted from a phase of a local maximum value of amplitude of vibrations resulting from rotating the pulleys.
    Type: Application
    Filed: December 13, 2011
    Publication date: November 6, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kenta Kimura, Yuji Hattori, Tomokazu Inagawa, Takafumi Inagaki, Yu Nagasato
  • 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