Including Fluid Drive Patents (Class 477/52)
  • Patent number: 11326324
    Abstract: The controller determines whether the vehicle is in a shuttle motion from the operating position of the forward/reverse travel operating member and the actual traveling direction of the vehicle. The controller determines a target braking force when the vehicle is in the shuttle motion. The controller determines at least one of a target displacement of the travel pump and a target displacement of the travel motor based on the target braking force.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: May 10, 2022
    Assignee: KOMATSU LTD.
    Inventor: Takahisa Oasa
  • Patent number: 11293164
    Abstract: A wheel loader includes a boom, a forward clutch, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for bringing the forward clutch into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the forward clutch on condition that the wheel loader advances while raising the boom in at least a loaded state.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 5, 2022
    Assignee: KOMATSU LTD.
    Inventors: Ryota Enomoto, Masanori Ikari, Kentaro Yajima, Takuma Nishimura
  • Patent number: 11143118
    Abstract: To provide a control device for a vehicle capable of controlling the torque of a drive source so as to appropriately balance the suppression of body vibrations and the securing of a transient response during acceleration or deceleration. This control device for a vehicle includes an accelerator position sensor that detects the accelerator opening, a torque adjustment mechanism such as a throttle valve that adjusts the torque of an engine as the drive source of the vehicle, and a powertrain control module (PCM) that controls the torque adjustment mechanism based on the accelerator opening. The PCM sets the target acceleration of the vehicle based on the accelerator opening, sets the target torsion angle of the drive shaft based on the target acceleration, sets the target torque of the engine based on the target torsion, and controls the torque adjustment mechanism based on the target torque.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: October 12, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Yuichiro Yamane, Akira Tsuda, Yuki Ishiyama, Takefumi Takada, Yuto Sakasegawa, Kazuki Kawamoto, Jumpei Takeda, Hiroyuki Morioka, Shin Kato, Masahiro Nagoshi, Atsushi Yamasaki
  • Patent number: 11124948
    Abstract: A working machine includes a traveling motor having a first speed and a second speed, an operation detector device to detect an operation extent of a traveling operation member, a controller device having an automatic decelerator portion to perform an automatic deceleration for reducing a revolving speeds of the traveling motor, and a storage device storing first control information representing a relation between a first-speed regulating revolving speed corresponding to the operation extent at the first speed and a second-speed regulating revolving speed corresponding to the operation extent at the second speed. The automatic decelerator portion obtains the first-speed regulating revolving speed based on the first control information and the operation extent when the traveling motor is at the second speed, and performs the automatic deceleration when the motor revolving speed is equal to or less than the first-speed regulating revolving speed.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: September 21, 2021
    Assignee: KUBOTA CORPORATION
    Inventor: Yuji Fukuda
  • Patent number: 11035462
    Abstract: When the vehicle speed increases and reaches a predetermined switching threshold, the controller reduces the displacement of the first travel motor and controls the flow rate control device to offset a flow rate excess in the hydraulic circuit in accordance with the reduction in the displacement of the first travel motor. After the vehicle speed has reached the switching threshold, the controller executes switching control to switch the clutch from an engaged state to a disengaged state.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: June 15, 2021
    Assignee: KOMATSU LTD.
    Inventor: Takahisa Oasa
  • Patent number: 10006447
    Abstract: An oil-pressure driving system includes a variable displacement oil-pressure pump, a tilting angle adjuster, an electric motor, and a control device. In the control device, a target assist torque calculating portion calculates a target assist torque, a first torque limiting portion limits the target assist torque to an output value that is a virtual limit value or less, and a drive control portion controls the electric motor such that the electric motor outputs a command torque corresponding to the output value. Further, in the control device, a torque deficiency calculating portion calculates a torque deficiency by subtracting the output value from the target assist torque, a tilting angle calculating portion calculates a tilting angle command value by which the output torque of the oil-pressure pump is reduced by the torque deficiency, and a tilting angle control portion outputs a tilt signal corresponding to the tilting angle command value to the tilting angle adjuster.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: June 26, 2018
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Hirohide Matsushima, Takashi Okashiro, Hideyasu Muraoka, Yoji Yudate, Kazuya Iwabe
  • Patent number: 9896108
    Abstract: In a 2H mode of two-wheel drive and a 4H mode of four-wheel drive, a driver does not put much importance on traveling performance on a rough road. Therefore, implementation of both of idling-stop control and neutral control is permitted. Compared with the 4H mode, in a 4HLc mode for limiting differential motions of a center differential gear and a rear differential gear, it can be regarded that the driver puts importance on the traveling performance on the rough road. Therefore, the implementation of the idling-stop control is prohibited and the implementation of the neutral control is permitted. In a 4LLc mode for switching a sub-reduction gear to a low gear side compared with the 4HLc mode, since it can be regarded that the driver puts more importance on the traveling performance on the rough road, both of the implementation of the idling stop control and the implementation of the neutral control are prohibited.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: February 20, 2018
    Assignee: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventor: Tomo Kato
  • Patent number: 9242631
    Abstract: A control method for a vehicle, which is equipped with a drive unit configured to drive a driving wheel and a controller configured to control the drive unit and receive an activation command for the drive unit from a user, includes determining whether the vehicle carries out coasting with the drive unit unactivated, determining whether the activation command has been received during the coasting, and limiting an actual braking force generated by the drive unit if the controller has received the activation command during the coasting, compared to a case where the vehicle runs in a state other than the coasting.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: January 26, 2016
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.
    Inventors: Nobuyuki Tanaka, Masahiro Naito
  • Patent number: 9028354
    Abstract: A hydraulic motor/pump regenerator system for recovering energy from the moving vehicle having high efficiency and precise control, thereby allowing the maximum amount of energy to be recovered and reused, is described. Three, fixed-displacement pump/motors are used to enable the system to recover and reapply energy at efficiencies expected to be above 70% in most circumstances. The invention is not limited to the use of three fixed displacement hydraulic units since using more units may in some drive cycles further improve efficiency. By selecting an appropriate combination of pump/motor units for providing the driveshaft torque required by the driver, embodiments of the present invention generate high recovery efficiency at any speed.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: May 12, 2015
    Assignee: Lighting Hybrids
    Inventors: Daniel S. Johnson, D. Jude Hueber, Jr., Jonathan L. Reynolds
  • Patent number: 9014934
    Abstract: A method of controlling a pump for a hybrid transmission includes commanding a first line pressure of the transmission and deriving a first torque value—an open-loop torque value—from the first line pressure command, and commanding the pump to operate at the first torque value. The method monitors actual speed of the pump and derives a second torque value—a closed-loop torque value—therefrom. A third torque value is derived from the first and second torque values, and the pump commanded to operate at the third torque value. A first speed value may be derived from the first line pressure command, and the second torque value derived from the difference between the monitored and the first speed values. Deriving the third torque value may include a substantially-linear combination of the first and second torque values.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 21, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Jy-Jen F. Sah
  • Publication number: 20150057899
    Abstract: Method for engaging and disengaging a hydraulic motor which is adjustable in its displacement from and to a hydrostatic drive train of a hydromechanical transmission with a closed hydraulic fluid circuit. Two adjustable hydraulic motors and a hydraulic pump are arranged in parallel in the hydrostatic drive train and connected to a mechanical drive on the output side. At least one of the two hydraulic motors is connected to the mechanical drive via an assigned clutch. As appropriate to the driving situation, during operation of the other hydraulic motor and the hydraulic pump at least one of the hydraulic motors is engaged via the assigned clutch with the hydromechanical transmission from which the hydraulic motor was previously disengaged, likewise as appropriate to the driving situation.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 26, 2015
    Inventor: Torsten Kohmaescher
  • Patent number: 8936118
    Abstract: The present disclosure relates to an emergency drive for a construction machine, comprising a hydraulic motor which is connectable with a pump transfer gearbox of a drive of the construction machine via a first mechanical shaft and a port provided for this purpose.
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: January 20, 2015
    Assignee: Liebherr-Werk Ehingen GmbH
    Inventor: Joerg Gebele
  • Patent number: 8888658
    Abstract: A control system (100) for an all-wheel-drive torque transfer case (102) coupling of a motor vehicle (104) including a power unit (130) having a centrifugally governed fluid pump (132) and a flow valve (134) movable between recirculation and diverter positions (134a, 134b). A control valve (136) located between the fluid pump (132), the all-wheel-drive clutch assembly (112), and the range shift assembly (120). The control valve (136) operable between a first position (136a) allowing fluid flow between the pump (132) and the clutch assembly (112), and a second position (136b) allowing fluid flow between the pump (132) and the range shift assembly (120). At least one range shift valve (138; 152, 154) located between the control valve (136) and the range shift assembly (120).
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: November 18, 2014
    Assignee: BorgWarner, Inc.
    Inventor: Larry A. Pritchard
  • Publication number: 20140336002
    Abstract: An industrial vehicle that includes an engine, a hydraulic actuator, a hydraulic pump, and an instruction member operated to instruct operation of the hydraulic actuator. A supply passage supplies hydraulic oil to the hydraulic actuator. A return passage returns return the hydraulic oil to an oil tank. A controller compares an engine speed and a predetermined comparison threshold value. When the engine speed is less than the comparison threshold value, the controller opens the return passage. The comparison threshold value includes a first threshold value and a second threshold value that is lower than the first threshold value. In response to the operation of the instruction member, the controller opens the return passage, performs revving control to increase the engine speed, and changes the comparison threshold value from the first threshold value to the second threshold value.
    Type: Application
    Filed: May 7, 2014
    Publication date: November 13, 2014
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Norihiko KATO, Yukikazu KOIDE
  • Publication number: 20140323268
    Abstract: To rapidly stop an upperstructure even though relief pressure is lowered due to an abnormality in a hydraulic device included in a swing motor driving circuit while intending to stop the upperstructure when a predetermined delay time has passed since a swing operation tool is brought back to a neutral position, provided are: a first choke for controlling a parking brake to apply a braking force to a swing motor when a predetermined delay time has passed since the tool is brought back to a neutral position in a state where the tool is connected to a pilot pump; and an on-off valve and a second choke for controlling the parking brake to apply a braking force to the motor when a delay time shorter than the predetermined delay time has passed since the tool is brought back to the neutral position and disconnected from the pilot pump.
    Type: Application
    Filed: March 28, 2012
    Publication date: October 30, 2014
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Kouji Ishikawa, Hidetoshi Satake, Shinji Nishikawa, Takatoshi Ooki
  • Patent number: 8845489
    Abstract: A powerplant (8) is provided with a drive shaft (4) and at least one engine (1) having an outlet shaft (2) that is necessarily set into rotation during starting of the engine (1), the drive shaft (4) being suitable for setting a mechanical system (7) into motion. The powerplant (8) includes a link member (3) having a clutch (15) and a declutchable freewheel (25) for mechanically linking the outlet shaft (2) to the drive shaft (4).
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: September 30, 2014
    Assignee: Airbus Helicopters
    Inventor: Michel Vialle
  • Publication number: 20140214295
    Abstract: A manner of managing operation of a machine is described for preventing damage/wear to movable machine components arising from operation of the machine/parts at excessive speed while the machine is traveling down a steep incline. The managing of the machine operation includes determining a downhill slope value in a machine direction of travel and then establishing a maximum commanded transmission output speed in accordance with the determined downhill slope value. Thereafter a maximum commanded gear ratio is established, for a transmission having a variable gear ratio, based upon the maximum commanded transmission output speed and a current engine speed. A controller compares the maximum commanded variable gear ratio to an operator requested gear ratio, and a target gear ratio is established for the variable gear ratio of the transmission based upon a minimum of the compared commanded variable gear ratio and the operator requested gear ratio.
    Type: Application
    Filed: January 31, 2013
    Publication date: July 31, 2014
    Applicant: CATERPILLAR INC.
    Inventor: Christopher Elliott
  • Patent number: 8758199
    Abstract: A load control system for a work vehicle including set rotation speed detection means for detecting a set rotation speed of an engine of the work vehicle, actual rotation speed detection means that senses an actual rotation speed of the engine, a continuously variable speed change device that receives power from the engine of the work vehicle, speed change position detecting means for detecting a speed change operating position of the continuously variable speed change device, operating means for speed-shifting the continuously variable speed change device, and control means for controlling the operation of the operating means.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: June 24, 2014
    Assignee: Kubota Corporation
    Inventors: Eiji Nishi, Atsushi Shinkai, Keishiro Nishi, Yasunobu Nakatani
  • Patent number: 8758195
    Abstract: A traveling speed control system for a work vehicle comprises an engine having a variable throttle opening; a hydrostatic transmission driven by the engine, the hydrostatic transmission having a variable output/input speed ratio; a travel mode selecting manipulator for selecting either a work travel mode or a normal travel mode; and an acceleration manipulator for setting a traveling speed of the work vehicle. Increase of the throttle opening during idling, of the engine is prior to increase of the output/input speed ratio for increasing the traveling speed of the work vehicle when the work travel mode is selected, and the increase of the throttle opening prior to the increase of the output/input speed ratio is canceled when the normal travel mode is selected.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: June 24, 2014
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventor: Koji Iwaki
  • Publication number: 20140141933
    Abstract: A drive system and method includes a gearbox system, a first hydraulic motor driving a first input shaft, a second hydraulic motor driving a second input shaft, a drive pump driving the first and second hydraulic motors, and a system control for controlling the drive pump, the clutch assembly, and the first and second hydraulic motors. The gearbox system includes the first input shaft having a first input gear driving a first output gear on an output shaft, the second input shaft having a second input gear driving a second output gear disengageable from the output shaft, and a clutch assembly for engaging the second output gear with the output shaft. The clutch assembly includes a clutch to engage the second output gear with the output shaft, and a fluid access channel through a rotary manifold to provide pressurized fluid to activate the clutch.
    Type: Application
    Filed: November 19, 2012
    Publication date: May 22, 2014
    Applicant: TIGERCAT INDUSTRIES INC.
    Inventors: Shawn Thomas PETTE, Kevin Ronald HENSON, Kenneth Roger SHANTZ
  • Patent number: 8702562
    Abstract: A system and method for controlling automatic stop-start of a motor vehicle is provided. The system and method is configured to disable an automatic stop-start mode of operation based on accumulator pressure conditions.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: April 22, 2014
    Assignee: GM Global Technology Operations
    Inventors: Zhen J. Zhang, Casie M. Bockenstette, Paul G. Otanez, Shushan Bai
  • Publication number: 20140100079
    Abstract: A method for starting up a vehicle includes driving a first wheel with an internal combustion engine vehicle drive and driving a second wheel with a hydrostatic additional drive. The hydrostatic additional drive has an adjustable hydraulic pump driven by the internal combustion engine, and at least one hydraulic motor coupled hydraulically thereto. The method further includes increasing and regulating a supply pressure of the at least one hydraulic motor in dependence on an accelerator pedal; determining a non-zero rotational speed of the first wheel; and synchronizing a rotational speed of the second wheel with the determined rotational speed of the first wheel. The method further includes increasing and regulating a supply pressure of the at least one hydraulic motor in dependence on an accelerator pedal; determining a non-zero speed of the vehicle; and adapting a rotational speed of the second wheel to the determined speed.
    Type: Application
    Filed: February 10, 2012
    Publication date: April 10, 2014
    Applicant: Robert Bosch GmbH
    Inventor: Peter Schubert
  • Publication number: 20140045650
    Abstract: Methods and systems are provided for reducing audible clunks and objectionable drive feel in vehicles including start/stop systems. In one example, a vehicle engine is shutdown during vehicle coasting. The vehicle engine is then restarted, while the vehicle is moving with a torque converter clutch disengaged. A transmission clutch pressure is then adjusted during the restart based on a torque converter output speed relative to a torque converter input speed.
    Type: Application
    Filed: October 21, 2013
    Publication date: February 13, 2014
    Applicant: Ford Global Technologies, LLC
    Inventors: Felix Nedorezov, Hong Jiang, Davor David Hrovat, Alex O'Connor Gibson
  • Patent number: 8600632
    Abstract: A vehicle control apparatus (100) for controlling a vehicle (10) provided, as a drive system, with: an internal combustion engine (200) in which a compression ratio is variable; and a transmission (500) which has a torque converter (300) and a lockup mechanism (400) between an input shaft and an engine output shaft (205) of the internal combustion engine and which can change a ratio between a rotational speed of the input shaft and a rotational speed (Nout) of an output shaft coupled with an axle, is provided with: a first controlling device for changing an operating state of the lockup mechanism in accordance with an operating condition of the vehicle; and a second controlling device for changing the compression ratio in at least one portion of a case where the operating state is changed.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: December 3, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tadayuki Nagai
  • Patent number: 8596294
    Abstract: A hydraulic control system for a vehicle powertrain with an engine capable of being selectively turned on and turned off includes an accumulator, a plurality of fluid passages through which a fluid flows between the accumulator and a transmission associated with the powertrain, and a smart memory alloy (SMA) valve in fluid communication with at least one of the fluid passages. The SMA valve has a transition temperature. When the temperature of the fluid is less than or about equal to the transition temperature, the SMA valve closes, and when the temperature of the fluid exceeds the transition temperature, the SMA valve opens. When the SMA valve is closed, the accumulator cannot be charged with fluid, that is, the accumulator, does not fill with fluid, and when the SMA valve is open, the accumulator charges with fluid passively.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: December 3, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Paul G. Otanez, Casie M. Bockenstette, Carlos E. Marin
  • Publication number: 20130316872
    Abstract: A powertrain system includes an internal combustion engine configured to execute autostop and autostart operations, and a multi-mode transmission with an electrically-powered hydraulic pump configured to provide pressurized hydraulic fluid to a hydraulic circuit. A Method for controlling operation of the hydraulic pump includes operating the hydraulic pump in a low power mode only when the engine is in an engine-off state, operator inputs to a brake pedal, an accelerator pedal, and a transmission range selector are within allowable states, temperatures of select transmission components are within respective predetermined temperature ranges, and transmission output torque is less than a threshold torque request.
    Type: Application
    Filed: May 24, 2012
    Publication date: November 28, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Poh Fong CHIN, Jean Marie MILLER, Allen J. LEHMEN, Valerie Zelko BYRD
  • Patent number: 8585156
    Abstract: A travel control device for a work vehicle includes: a hydraulic pump; a plurality of hydraulic motors connected to the hydraulic pump in parallel through a closed-circuit connection, that drive different wheels with pressure oil delivered from the hydraulic pump; a slip detection device that detects a slip occurring at each of the wheels; and a flow control device that reduces, upon detection of a slip occurring at any of the wheels by the slip detection device, a quantity of pressure oil supplied to a hydraulic motor for driving the wheel at which the slip has been detected, among the plurality of hydraulic motors.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: November 19, 2013
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tsutomu Udagawa, Eiji Egawa, Tsukasa Toyooka, Makoto Sugaya, Hideo Sorata, Tsuyoshi Nakamura, Akira Nakayama, Kazuo Takiguchi, Kensuke Satou
  • Publication number: 20130282243
    Abstract: A method of controlling thermal loading in a multi-speed dual-clutch transmission (DCT) that is paired with an internal combustion engine in a vehicle is provided. The method includes detecting operation of the vehicle and ascertaining a degree of thermal loading on the DCT. The method also includes selecting a remedial action corresponding to the ascertained degree of thermal loading. Additionally, the method includes activating the selected remedial action such that the thermal loading on the DCT is reduced. A vehicle having a DCT, an internal combustion engine, and a controller configured to control thermal loading in the DCT is also disclosed.
    Type: Application
    Filed: April 20, 2012
    Publication date: October 24, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Xuefeng Tim Tao, John William Boughner, Alfonso G. Hysko, Jonathan P. Kish, Matthew D. Whitton, Fei An, Steven P. Moorman
  • Patent number: 8540048
    Abstract: A system for controlling a transmission including a fluid pump and a fluid motor operably coupled to one another in a fluid circuit is disclosed. The system includes a controller configured to receive signals indicative of operator inputs, and determine a variable pressure limit in the fluid circuit based on the signals indicative of operator inputs. The controller is further configured to control displacement of at least one of the fluid pump and the fluid motor based on the variable pressure limit, such that a pressure level in the fluid circuit is maintained below the variable pressure limit.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: September 24, 2013
    Assignee: Caterpillar Inc.
    Inventors: Bradley J. Will, Randall T. Anderson
  • Patent number: 8529402
    Abstract: A pump arrangement for fluid in an automotive transmission system includes, but is not limited to a first, low-pressure pump stage and a second, high-pressure pump stage, the first pump stage supplying low-pressure fluid to a lubrication/cooling system and to the inlet of second pump stage, which supplies high pressure fluid to a hydraulic control system. Fluid from both systems is returned via a reservoir and filter to the first pump stage.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: September 10, 2013
    Assignee: GM Global Technology Operations LLC
    Inventor: Eckhard Kirchner
  • Publication number: 20130225364
    Abstract: A work vehicle includes a target rotational speed calculation section for obtaining a target rotational speed of an engine corresponding to an operation of an accelerator, a high-speed-rotation rotational speed setting section for the engine rotational speed, an engine rotational speed control section for controlling the engine rotational speed, and a high-speed-rotation instruction operation section for providing a high-speed-rotation instruction for the engine rotational speed. The engine section effects an accelerator control for controlling the engine rotational speed to the target rotational speed when the high-speed-rotation instruction operation section does not so provide. The engine rotational speed control section effects a high-speed-rotation control for controlling the engine rotational speed to the higher of the target rotational speed and the high-speed-rotation rotational speed when the rotational speed instruction operation section provides the high-speed-rotation instruction.
    Type: Application
    Filed: August 27, 2012
    Publication date: August 29, 2013
    Applicant: KUBOTA CORPORATION
    Inventors: Yoshihiko Kuroshita, Issei Tanimura, Akiyoshi Ono, Atsushi Shinkai
  • Publication number: 20130217539
    Abstract: A control apparatus for a vehicular drive system provided with an automatic transmission constituting a part of a power transmitting path between an electric motor and drive wheels, and a fluid-operated power transmitting device provided between the electric motor and the automatic transmission and having an input rotary element connected to said electric motor, and an output rotary element connected to said automatic transmission, includes a warm-up control implementing portion configured to implement a stall control of said fluid-operated power transmitting device wherein the input rotary element of said fluid-operated power transmitting device is rotated by said electric motor while the fluid-operated power transmitting device is placed in a stalling state.
    Type: Application
    Filed: October 22, 2010
    Publication date: August 22, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroshi Natsume
  • Patent number: 8506453
    Abstract: A method for operating a torque-transmitting system, which is coupled on the input side to an output shaft of a drive assembly and on the output side to an input shaft of a transmission. A torque flux from the drive assembly to the transmission passes via the torque-transmitting system. The torque-transmitting system includes a hydrodynamic torque converter via which a hydraulic path of the torque flux passes, a converter lockup clutch which is arranged functionally in parallel with the torque converter and via which a mechanical path of the torque flux passes, and a control unit which controls distribution of the torque flux between the hydraulic and mechanical paths in such a way that a predetermined overall torque profile is established at the input shaft of the transmission.
    Type: Grant
    Filed: May 30, 2009
    Date of Patent: August 13, 2013
    Assignee: Volkswagen Aktiengesellschaft
    Inventors: Jörg Rieling, Guido Wachsmuth, Dennis König
  • Patent number: 8447480
    Abstract: A transmission control method for a continuously variable transmission for enhancing the response of a change in engine speed to a driver's accelerating/decelerating operation. In a hydraulic type continuously variable transmission, when a sport operating mode is being selected (step S1: SPORT OPERATING MODE), a target engine speed T_NE (rpm) is calculated from the vehicle velocity V (km/hr) and the position ? (degrees) of a throttle valve 60 (step S4). Further, a target angle T_A (degrees) for a motor swash plate is calculated from the vehicle velocity and the target engine speed T_NE (step S5). The motor swash plate is moved according to the difference between the actual angle A of the motor swash plate 46 and the target angle T_A.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: May 21, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventor: Yasutaka Usukura
  • Publication number: 20130109531
    Abstract: There is provided a control device for a vehicle that includes: a driving force source; a hydraulic transmission; and an interrupting mechanism that is able to interrupt power transmission from the driving force source to a drive wheel. The control device includes a controller that is configured to, after the driving force source is stopped while the vehicle is travelling, on the condition that a hydraulic pressure applied to the transmission has decreased, execute control for setting a speed ratio of the transmission to a predetermined low speed ratio, such as a high-speed gear in the case where a low-speed gear and the high-speed gear are provided, while the vehicle is travelling.
    Type: Application
    Filed: October 26, 2012
    Publication date: May 2, 2013
    Inventor: Takeshi Hoshiba
  • Patent number: 8414454
    Abstract: A load control system for a work vehicle including set rotation speed detection means for detecting a set rotation speed of an engine of the work vehicle, actual rotation speed detection means that senses an actual rotation speed of the engine, a continuously variable speed change device that receives power from the engine of the work vehicle, speed change position detecting means for detecting a speed change operating position of the continuously variable speed change device, operating means for speed-shifting the continuously variable speed change device, and control means for controlling the operation of the operating means.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: April 9, 2013
    Assignee: Kubota Corporation
    Inventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
  • Patent number: 8403790
    Abstract: A motor transmission apparatus is provided between a transmission output shaft coupled to a drive wheel and a motor shaft coupled to a motor/generator. The motor transmission apparatus includes a first power transmission path that is switched to a power transmission condition by a high clutch having a clutch oil chamber, and a second power transmission path that is switched to a power transmission condition by a low brake having a brake oil chamber. Working oil discharged from an oil pump is guided to an oil passage switching valve via an output control valve. The working oil is distributed to one of the clutch oil chamber and the brake oil chamber by the oil passage switching valve, and therefore interlocking, in which the high clutch and the low brake are engaged simultaneously, can be avoided.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: March 26, 2013
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Takenori Hashimoto, Atsushi Namba
  • Patent number: 8276439
    Abstract: A system for calibrating a transmission includes a slip generation module, a volume determination module, and a calibration control module. The slip generation module generates transmission slip. The volume determination module, after the transmission slip has been generated, applies a torque converter clutch (TCC) and determines a volume of the TCC based on a period for the TCC to fill with hydraulic fluid. The calibration control module generates a calibrated volume based on the determined volume and calibrates a control module based on the calibrated volume, wherein the control module controls the transmission.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: October 2, 2012
    Inventor: Andrew L. Mitchell
  • Patent number: 8210976
    Abstract: A hydraulic control system for a automatic transmission includes a plurality of solenoids and valves in fluid communication with a plurality of shift actuators. The shift actuators are operable to actuate a plurality of torque transmitting devices. Selective activation of combinations of the solenoids allows for a pressurized fluid to activate at least one of the shift actuators. The solenoids are configured to provide a forward gear ratio and a reverse gear ratio when the solenoids are deengerized.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: July 3, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Zhe Xie, Bret M. Olson, Robert L. Moses, Vijay A. Neelakantan
  • Patent number: 8202197
    Abstract: A hydraulic pressure control apparatus includes a primary regulator valve that regulates a pressure discharged from an oil pump to form a line pressure that is used as an original pressure for a hydraulic pressure that is supplied to each element, and a secondary regulator valve that regulates a hydraulic pressure downstream of the primary regulator valve to form a secondary pressure. Two pilot pressures (first modulator hydraulic pressure, control hydraulic pressure from a duty solenoid) are supplied to the secondary regulator valve. The secondary regulator valve is configured in such a manner that when one of the pilot pressures changes, a change in the one of the pilot pressures is absorbed by the other pilot pressure.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: June 19, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yusuke Ogata, Toshihiro Aoyama
  • Patent number: 8187147
    Abstract: A hydraulic control system for distributing pressurized fluid to a multi-mode hybrid-type power transmission is provided, as well as a method for regulating the same. The hydraulic control system includes an engine-driven main pump in fluid communication with a main regulator valve, and an electrically-driven auxiliary pump in fluid communication with an auxiliary regulator valve. One pressure control solenoid provides feedback (boost) pressure to both regulator valves, and thereby modify output of the main and auxiliary pumps. A controller selectively modifies distribution of boost pressure to ensure a continuous and controllable feed of hydraulic pressure to the transmission during all vehicle operations.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: May 29, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Eric S. Tryon, Michael D. Foster
  • Patent number: 8185279
    Abstract: A control system (100) for traction transmission has at least two multi capacity motors (M1, M2), which are adapted to rotate a vehicle's wheels (J1, J2) and which multi capacity motor (M1) is arranged to rotate a traction wheel (J2), and the multi capacity motor (M2) is arranged to rotate another traction wheel (J1), whereby motor parts (M1a and M2a) of partial rotational volumes of the multi capacity motors (M1, M2) can be connected in series, whereby the anti-slip is on.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: May 22, 2012
    Assignee: Sampo-Hydraulics Oy
    Inventor: Roni Ryyppö
  • Publication number: 20120088630
    Abstract: A system and method for controlling automatic stop-start of a motor vehicle is provided. The system and method is configured to enable an automatic stop-start mode of operation based on vehicle conditions. In addition, the system and method is configured to selectively actuate an accumulator to prime the transmission for a smooth restart.
    Type: Application
    Filed: September 8, 2011
    Publication date: April 12, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Zhen J. Zhang, Casie M. Bockenstette, Paul G. Otanez
  • Publication number: 20120088631
    Abstract: A system and method for controlling automatic stop-start of a motor vehicle is provided. The system and method is configured to disable an automatic stop-start mode of operation based on accumulator pressure conditions.
    Type: Application
    Filed: September 9, 2011
    Publication date: April 12, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Zhen J. Zhang, Casie M. Bockenstette, Paul G. Otanez, Shushan Bai
  • Publication number: 20120088632
    Abstract: A system and method for controlling automatic stop-start of a motor vehicle is provided. The system and method is configured to enable an automatic stop-start mode of operation that minimizes clutch fill during engine restart.
    Type: Application
    Filed: September 9, 2011
    Publication date: April 12, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Zhen J. Zhang, Casie M. Bockenstette, Paul G. Otanez
  • Publication number: 20120010044
    Abstract: A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one embodiment, the method adjusts a transmission tie-up force in response to engine starting. The method may improve vehicle launch for stop/start vehicles.
    Type: Application
    Filed: July 9, 2010
    Publication date: January 12, 2012
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Alex O'Connor Gibson, Hong Jiang, Roger Lyle Huffmaster, Felix Nedorezov, Seung-Hoon Lee, Yuji Fujii
  • Patent number: 8057355
    Abstract: A hydraulic control system for a multi-mode hybrid-type power transmission is provided, including an engine-driven main pump in fluid communication with a main regulator valve, and an electrically driven auxiliary pump in fluid communication with an auxiliary regulator valve. A first pressure control solenoid is configured to provide boost pressure to the main regulator valve and thereby boost output of the main pump. A second pressure control solenoid is configured to provide boost pressure to the auxiliary regulator valve and thereby boost output of the auxiliary pump. The distribution of boost pressure from the pressure control solenoids is selectively modified such that at least one of the flows of pressurized fluid from the pumps is equal to the current line pressure requirements of the transmission during engine auto-start and auto-stop, and transitions thereto. An improved method for regulating the hydraulic control system is also provided.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: November 15, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Eric S. Tryon, Michael D. Foster
  • Patent number: 7987941
    Abstract: A construction vehicle includes an engine, a hydraulic pump driven by the engine, a travel hydraulic motor driven by pressure oil discharged from the hydraulic pump, travel wheels driven by the drive force of the travel hydraulic motor, and a controller. The controller is configured to control an engine speed, displacement of the hydraulic pump, and displacement of the travel hydraulic motor in order to control a vehicle speed and traction force. The controller is further configured to increase a maximum displacement of the travel hydraulic motor as the vehicle speed decreases within a low speed range in which the vehicle speed is equal to or less than a predetermined threshold.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: August 2, 2011
    Assignee: Komatsu Ltd.
    Inventors: Atsushi Shirao, Minoru Wada, Yuuya Kusumoto
  • Patent number: 7867136
    Abstract: A method is provided for limiting a torque output associated with a power conversion unit. The method may include receiving data related to a pressure associated with an implement system hydraulic cylinder, determining, based on the data, a preferred torque value, wherein the preferred torque value is below a predetermined threshold value associated with one or more drive train components, and modifying a torque output associated with a power conversion unit to approximate the preferred torque value.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: January 11, 2011
    Assignee: Caterpillar Inc
    Inventor: Andrew N. Schifferer
  • Patent number: 7860631
    Abstract: A method of operating a transmission of a vehicle. The method includes determining an open loop ratio percentage from an engine RPM input signal and a brake input signal using a first algorithm. Determining a closed loop ratio percentage from the engine RPM input signal, a vehicle RPM input signal and a throttle input signal using a second algorithm. Summing the open loop percentage and closed loop ratio percentage to calculate a ratio command percentage that is used to sum with a swashplate input to actuate a swashplate positioner and operate the transmission.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: December 28, 2010
    Assignee: Sauer-Danfoss, Inc.
    Inventor: Keith R. Williams