Clutch, Engine, And Transmission Controlled Patents (Class 477/77)
  • Patent number: 10589744
    Abstract: A shifting control method for a vehicle with a dual clutch transmission (DCT), the shifting control method may include controlling engine torque to be increased according to reserve demand torque by giving the reserve demand torque of an engine to be increased to a predetermined value or more when if a controller determines that the vehicle enters a manual power off and downshift shifting; controlling, by the controller, a release side clutch to be released; controlling, by the controller, an engine torque to perform a control so that engine speed follows coupling side input shaft speed; and completing the shifting by performing a control so that a coupling side clutch is coupled when it is determined that the actual shift is completed.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: March 17, 2020
    Assignees: Hyundai Motor Compnay, Kia Motors Corp.
    Inventor: Sung Hyun Cho
  • Patent number: 10343687
    Abstract: A vehicle includes a transmission having input and output shafts and clutches engageable in combinations to create power-flow paths between the input and output shafts. The vehicle further includes wheels driven by the output shaft and a controller. The controller is programmed to engage one of the combinations, and, responsive to the wheels slipping and a desired engine torque reduction exceeding a threshold, command capacity to an additional one of the clutches to reduce torque of the output shaft.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: July 9, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Thomas G. Leone, Zhengyu Dai, Jianbo Lu, Kenneth James Miller
  • Patent number: 10077813
    Abstract: A shift control method for a DCT vehicle, which adjusts a time required to shift gears through clutch control in a DCT. The shift control method includes controlling a release-side clutch such that the release-side clutch is partially disengaged by a controller when gear shifting is initiated in a state in which an accelerator pedal is not pressed, performing synchronization control by partially applying an apply-side clutch torque in an initial stage of synchronization such that an engine rotational speed follows and synchronizes an apply-side input shaft speed, and partially applying a release-side clutch torque in a last stage of synchronization by the controller, and performing torque hand-over control such that an apply-side clutch is engaged while the release-side clutch is disengaged by the controller, after performing the synchronization control.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: September 18, 2018
    Assignee: HYUNDAI MOTOR COMPANY
    Inventor: Sung Hyun Cho
  • Patent number: 10046642
    Abstract: A control method of a dual clutch transmission for a hybrid electric vehicle includes: determining, by a transmission controller, whether a vehicle has entered a power-off down-shift state; determining, by the transmission controller, whether a transmission including a first input shaft, a second input shaft, and an output shaft has entered a torque phase, when the first determining step determines that the vehicle has entered the power-off down-shift state; calculating a compensatory torque for compensating for a change in a regenerative braking force according to a change of a gear ratio in accordance with a completion percentage of the torque phase, when it is determined that a transmission has entered the torque phase; and compensating for regenerative torque of a motor by applying the compensatory torque.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: August 14, 2018
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Sung Hyun Cho, Young Jun Lee
  • Patent number: 10011283
    Abstract: Methods and systems for driving vehicle accessories of a vehicle that includes an automatic transmission are presented. In one non-limiting example, the vehicle accessories are driven via a vehicle's kinetic energy while an engine of the vehicle has stopped rotating. Vehicle accessories are driven from a location of a driveline downstream of a torque converter impeller.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: July 3, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Ross Dykstra Pursifull, Ralph Wayne Cunningham, Michael E. Reibling, Steven Michael Cyr, Ray C. Siciak
  • Patent number: 9926988
    Abstract: A starting clutch control device for an automatic transmission has a starting clutch controller. The starting control device controls a transmission torque capacity of a starting clutch interposed in a transmission path in which rotation of the power source is transmitted to wheels while shifting is underway by the automatic transmission. The starting clutch controller controls the transmission torque capacity of the starting clutch such that a rotation trajectory of the power source develops as desired in a low rotation speed range in which the transmission torque capacity control of the starting clutch is necessary. The starting clutch controller causes the transmission torque capacity of the starting clutch to change, when a shift of the automatic transmission occurs during the transmission torque capacity control by the starting clutch controller, in a direction in which the change in the rotation trajectory will occur corresponding to the shift.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: March 27, 2018
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Yoshinobu Kawamoto
  • Patent number: 9841070
    Abstract: A saddle-riding type vehicle includes an automatic clutch mechanism configured to be activated by an actuator which enables a push start to be executed, so that even when a charged capacity of a battery is reduced, an engine can be started. A control unit of the vehicle proceeds to a push start control mode when an engine stopped state detection portion detects a stopped state of an engine, a vehicle stopped state detection portion detects a stopped state of the saddle-riding type vehicle, and a gear selected state detection portion detects a state in which any one of gears of a transmission is selected. In the push start control mode, the control unit applies a clutch to start the engine when a vehicle speed detection portion detects a predetermined vehicle speed or faster, and a cutoff switch state detection portion detects a change in state of a cutoff switch.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: December 12, 2017
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kosuke Tsunashima, Hiroyuki Kojima, Junya Ono, Tatsuya Ryuzaki
  • Patent number: 9791043
    Abstract: A control device of a powertrain with a centrifugal pendulum damper is provided comprising a power transmission shaft which transmits power between a drive source and an automatic transmission, and a centrifugal pendulum damper which is coupled to the power transmission shaft and a connection/disconnection mechanism. The automatic transmission has a transmission mechanism of a hydraulic pressure control type, which includes a transmission control module which performs a control to supply transmission hydraulic pressure to the transmission mechanism. The transmission control module includes a transmission characteristic changing module which changes a control characteristic of transmission hydraulic pressure according to an engagement degree of the connection/disconnection mechanism.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: October 17, 2017
    Assignee: Mazda Motor Corporation
    Inventors: Kyosei Nakashima, Yasunari Nakayama, Tadashi Saito, Masaru Nakagishi, Narifumi Domen, Narihito Hongawara
  • Patent number: 9701301
    Abstract: A method for operating a dual-clutch transmission of a vehicle having partial transmissions with respective transmission input shafts. Two friction clutches can couple a corresponding input shaft of the partial transmissions to a drive shaft. Both partial transmissions drive a common output shaft. During a rocking free operation for rocking the vehicle free, a gear in each respective partial transmission is engaged for driving in opposed primary and secondary directions as specified by the driver. The clutches are alternately engaged and disengaged. For rocking the vehicle free, the clutch of the partial transmission having the gear for driving in the primary direction when engaged, is engaged based on accelerator pedal actuation, and in contrast the clutch of the partial transmission having the gear for driving in the secondary direction when engaged, is automatically engaged if neither of the accelerator or brake pedals has been actuated.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: July 11, 2017
    Assignee: ZF Friedrichshafen AG
    Inventor: Roland Mair
  • Patent number: 9598081
    Abstract: A method of operating a dual-clutch transmission of a vehicle having partial transmissions with respective transmission input shafts. Two friction clutches can couple a corresponding input shaft of the partial transmissions to a drive shaft. Both partial transmissions drive a common output shaft. In a process for starting the motor vehicle, a gear in each of the two partial transmissions is engaged and, if the starting speed of the vehicle in a primary direction is lower than a limit value, the gears in the two partial transmissions are kept engaged. If, however, the starting speed is higher than the limit value, the gear for the travel in an opposite direction in the partial transmission, not involved in the starting process, is disengaged and a follow-up gear, for the gear in the partial transmission involved in the starting process, is engaged.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: March 21, 2017
    Assignee: ZF Friedrichshafen AG
    Inventor: Roland Mair
  • Patent number: 9440654
    Abstract: A method of controlling a hybrid vehicle having a hybrid powertrain with an engine and a motor/generator includes receiving data indicative of anticipated future vehicle operating conditions, and determining via a controller optimal operating parameters for the engine and for the motor/generator based at least partially on the data. A controller then commands a powertrain operating strategy for the engine and the motor/generator based on the determined optimal operating parameters. The data received can be from active onboard sensing systems and from vehicle telematics systems.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: September 13, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Venkata Prasad Atluri, Matias Garibaldi, Chandra S. Namuduri
  • Patent number: 9216726
    Abstract: An ECU executes a program including the steps of: executing fuel-cut control when an IG OFF operation has been performed and when a vehicle is traveling; executing deceleration control when vehicle speed is equal to or higher than a threshold value; ending the deceleration control and permitting restart of an engine when the vehicle speed has become lower than the threshold value; and controlling a first MG and the engine when an IG ON operation has been performed.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: December 22, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki Yaguchi, Takeshi Hoshiba, Akihiro Kimura, Masahiro Naito
  • Patent number: 9187076
    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: Grant
    Filed: October 21, 2013
    Date of Patent: November 17, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Felix Nedorezov, Hong Jiang, Davor David Hrovat, Alex O'Connor Gibson
  • Patent number: 9175658
    Abstract: Methods and systems are provided for controlling a vehicle engine coupled to a stepped-gear-ratio transmission. One example method comprises, in response to a first vehicle moving condition, shutting down the engine and at least partially disengaging the transmission while the vehicle is moving; and during a subsequent restart, while the vehicle is moving, starting the engine using starter motor assistance and adjusting a degree of engagement of a transmission clutch to adjust a torque transmitted to a wheel of the vehicle.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: November 3, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Alex O'Connor Gibson, Ross Dykstra Pursifull, Gopichandra Surnilla, Joseph Norman Ulrey, Roger Lyle Huffmaster, Peter John Grutter, Yuji Fujii, Gregory Michael Pietron, Seung-Hoon Lee
  • Patent number: 9020710
    Abstract: A method of controlling a vehicle, where the vehicle includes an internal combustion engine and a transmission having a neutral state and an engaged state, includes setting the state of the transmission. The state of the transmission is set as the neutral state or the engaged state based on a restart condition, where the restart condition is one of: (i) a no wheel torque restart condition, and (ii) a wheel torque restart condition. The method additionally includes starting the engine.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: April 28, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Ryan Abraham McGee, Ihab S. Soliman, Xiaoyong Wang
  • Patent number: 9020718
    Abstract: A torque converter (1) connecting an engine (14) and a transmission (15) of a vehicle is provided with a lockup clutch (2), and a controller (5) is programmed to increase an engagement force of a lockup clutch (2) under open loop control before shifting to feedback control of the engaging force using a target slip rotation speed. When an engine output torque rapidly decreases during open loop control (S59, S60), the controller (5) decreases the engaging force according to a variation amount of the engine output torque (S61, S65), thereby preventing an unintentional sudden engagement of the lockup clutch (2) due to decrease in the engine output torque.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: April 28, 2015
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yuji Katsumata, Satoshi Segawa
  • Patent number: 9008929
    Abstract: A method for controlling a powertrain includes the following steps: (a) determining whether a vehicle is coasting to a stop based on an accelerator pedal position; (b) determining whether an automatic transmission is in first gear; (c) shifting an input clutch from an engaged state to a disengaged state in order to operatively disconnect the automatic transmission from an internal combustion engine if the vehicle is coasting to a stop and the automatic transmission is not in first gear; and (d) shifting the automatic transmission to the first gear in order to allow the internal combustion engine to be shut down while the vehicle is coasting to a stop.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: April 14, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Martin Gentile, Armin Mueller
  • Patent number: 8997916
    Abstract: A clutch actuator and a speed change actuator are disposed so as to be adjacent to each other on one side of an engine main body along the axis of a crankshaft. The clutch actuator is provided with a manual clutch operating part capable of being manually operated. The speed change actuator is provided with a manual speed change operating part capable of being manually operated.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: April 7, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazuhiro Norita, Toshimasa Mitsubori
  • Patent number: 8996266
    Abstract: A vehicle includes an engine, an engine control module (ECM), and a dual clutch transmission (DCT) assembly. The DCT assembly has first and second input clutches, first and second gear sets selectively connected to the engine via the respective first and second input clutches, and a transmission control module (TCM). In executing a launch control method, the TCM receives a launch request, receives an actual engine torque, and determines the inertia and acceleration of the engine. The TCM then calculates a clutch torque for the particular input clutch used for vehicle launch as a function of the actual engine torque and the product of the inertia and the acceleration, compares the calculated clutch torque to the commanded clutch torque, modifies a torque-to-position (TTP) table depending on the comparison result, and transmits a clutch position signal to the designated input clutch to command an apply position extracted from the TTP table.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: March 31, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Colin Hultengren, Craig J. Hawkins, Matthew D. Whitton, Crystal Nassouri, Jonathan P. Kish
  • Publication number: 20150080176
    Abstract: An industrial vehicle includes an accelerator, an accelerator opening sensor which detects an opening of the accelerator, a loading unit, an engine and a torque restriction releasing unit. When the torque restriction releasing unit is set in an Eco-mode in which torque of the engine is restricted, if the opening of the accelerator detected by the accelerator opening sensor is a first predetermined value or greater and at least one of conditions that a speed of the vehicle is a second predetermined value or greater and that the loading unit is in a lifting operation, is satisfied and such conditions of the accelerator and the vehicle speed and/or lifting operation are continued for a predetermined period of time, the torque restriction releasing unit releases the torque restriction.
    Type: Application
    Filed: September 16, 2014
    Publication date: March 19, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yukikazu KOIDE, Norihiko KATO
  • Publication number: 20150046049
    Abstract: A method of controlling a launch clutch during an engine restart event commands a positive torque capacity before the engine reaches idle speed. Early application of the launch clutch reduces the time delay between brake pedal release and vehicle acceleration. To avoid excessive drag on the engine during the restart event, the torque capacity is adjusted using closed loop control. A controller calculates a maximum rate of change of torque capacity based on measured engine speed and an engine acceleration and does not increase the commanded torque capacity faster than the calculated rate. In some circumstances the maximum rate of change may be negative, resulting in a reduction in commanded torque capacity.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 12, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Matthew John Shelton, Hong Jiang, Felix Nedorezov, Roger Lyle Huffmaster
  • Publication number: 20150039182
    Abstract: A method of decoupling a power take-off drive of a motor vehicle transmission during travel of a motor vehicle in which a form-locking shift element of the power take-off drive is controlled for disengaging the power take-off drive. To implement reliable decoupling without interrupting travel of the motor vehicle, if disengagement of the shift element initially did not occur, control of the shift element is immediately implemented the next time a separating clutch, placed between the motor vehicle transmission and a drive engine of the motor vehicle, is actuated and/or a connection of the shift element toward an output side of the motor vehicle transmission is interrupted, over the course of a subsequent gear shift in the motor vehicle transmission. A drive train of a motor vehicle, a computer program product, and a data carrier having the computer program product.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 5, 2015
    Inventors: Ingo SAUTER, Thomas HAFEN, Melchor MORO-OLIVEROS
  • Publication number: 20150038293
    Abstract: A powertrain architecture includes an engine and a transmission coupled through a launch device that is configured to be selectively mechanically coupled to the engine and to the transmission. A ring gear is positioned at least partially around the launch device. An engine lock up clutch mechanically couples the engine to the ring gear. A turbine lock up clutch mechanically couples the launch device to the ring gear. Ancillary devices are provided to receive power from or transmit power to the ring gear. The engine lock up clutch and the turbine lock up clutch selectively engage the ring gear to power at least one ancillary device.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 5, 2015
    Applicant: Allison Transmission, Inc.
    Inventor: Jonathan Kellerman
  • Publication number: 20150024905
    Abstract: A method of controlling a dual clutch transmission power on up shift including an on-coming clutch and an off-going clutch. The method includes implementing a prep phase comprised of decreasing torque on the off-going clutch, monitoring the off-going clutch speed to determine a slip point, and adding a bump torque to the off-going clutch when the off-going clutch reaches the slip point. The method implements a torque phase transferring torque from the off-going clutch to the on-coming clutch by increasing torque on the on-coming clutch towards an engine torque, decreasing torque on the off-going clutch, and simultaneously keeping the combination of torques greater than the slip point.
    Type: Application
    Filed: July 16, 2014
    Publication date: January 22, 2015
    Inventors: Jeffrey S. Dunfee, II, Andrew Hart, Simon Fitzgerald, Michael Gallion
  • Publication number: 20140365094
    Abstract: Methods and systems for providing vacuum to a vehicle are described. In one example, a method adjusts an application force of a transmission clutch in response to a request for additional vacuum.
    Type: Application
    Filed: June 7, 2013
    Publication date: December 11, 2014
    Inventors: Ralph Wayne Cunningham, Ross Dykstra Pursifull
  • Patent number: 8909447
    Abstract: A method of controlling shifts in a vehicle transmission, for example a utility vehicle, having a transmission or partial transmission designed as a dual-clutch transmission that shifts as a without traction force interruption. The transmission comprises a dual clutch having a first clutch and a second clutch that are functionally connected to a drive engine, and a transmission or partial transmission comprises a main transmission that shifts with traction force interruption and is connected to a drive-train downstream from the dual-clutch transmission. During shifts in the main transmission that is connected downstream from the dual-clutch transmission, the dual clutch is operated, by pre-loading the two clutches, as a transmission brake and/or an engine brake for adapting the speed of components to be shifted so as to enable short shifting times and ensure comfortable and reliable driving operation.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: December 9, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Florian Schneider, Roland Mair
  • Patent number: 8900095
    Abstract: A method of commanding a synchronous gear shift begins by receiving a request to shift from a third gear to a first gear, and skipping a second gear having a gear ratio between the gear ratio of the first gear and the gear ratio of the third gear. Subsequently the method includes: reducing a torque command to a predetermined value; opening a clutch disposed on the input shaft of the transmission to decouple the transmission from the engine; transitioning the engine from a torque-control mode into a speed-control mode; commanding the engine to rotate at a speed dictated by the motion of the vehicle and the gear ratio of the first gear; closing the clutch to couple the transmission and the engine; and transitioning the engine back into the torque-control mode.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: December 2, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Christopher E. Whitney, Christopher Harold Knieper, Ronald W. Van Diepen, Ning Jin, Matthew D. Whitton
  • Publication number: 20140349814
    Abstract: In a drive control device in a drive system including a four joint link mechanism type continuously variable transmission having a one-way clutch (OWC) which can transmit only power from a power source to driving wheels, the drive control device is configured to limit a transmission ratio or an output of the power source when an output speed of the continuously variable transmission is lower than a threshold value. The threshold value is represented as an output speed of the continuously variable transmission at an intersection point of a line that represents an output torque where a maximum driving force is achieved and a line that represents a torque outputted when a swing angle of an input member of the OWC which converts rotational power from the power source into swing power becomes a maximum torsion angle.
    Type: Application
    Filed: September 13, 2012
    Publication date: November 27, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Kazuki Ichikawa, Mitsuhiro Iwadare
  • Patent number: 8892323
    Abstract: A control device controls a transmission mechanism which includes a first clutch to be engaged at startup and a second clutch, and is interlocked when hydraulic pressure is supplied to the first and second clutches and when the first and second clutches are completely engaged. The control device includes a hydraulic pressure control unit controlling hydraulic pressure supplied to the transmission mechanism so that the first clutch is set in a completely engaged state and the second clutch is set in a slip interlock state where the second clutch is not completely engaged in the case of a return from an idle stop control in which an engine is automatically stopped. The hydraulic pressure control unit starts reducing hydraulic pressure supplied to the second clutch when an increased amount of an engine rotation speed per unit time becomes smaller than a predetermined value.
    Type: Grant
    Filed: January 17, 2011
    Date of Patent: November 18, 2014
    Assignees: Jatco Ltd, Nissan Motor Co., Ltd.
    Inventors: Hideshi Wakayama, Keichi Tatewaki, Hiroshi Sekiya, Koutarou Tagami, Seiichiro Takahashi, Yuzuru Tohta, Takashi Matsuda, Daisuke Matsumoto
  • Patent number: 8880303
    Abstract: A vehicle control unit and a vehicle equipped with the vehicle control unit are provided, the vehicle control unit being capable of preventing a shift change from being permitted in a direction opposite to a vehicle traveling direction caused by an erroneous operation of a shift lever during a traveling mode.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: November 4, 2014
    Assignee: Mitsubishi Nichiyu Forklift Co., Ltd.
    Inventors: Naoki Ishikawa, Katsumi Ueda, Masanobu Seki
  • Patent number: 8876655
    Abstract: A control strategy for launching a motor vehicle includes using an electric motor to provide high torque at low speeds during synchronization of launch clutches. An internal combustion engine is started and connected with the electric motor to provide additional torque capacity. Selective engagement and disengagement of an engine disconnect clutch prevents the engine start from interfering with the motor vehicle launch.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: November 4, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventors: Norman Schoenek, Min-Joong Kim, Hong Yang
  • Patent number: 8870712
    Abstract: A method of controlling a shift of an automated group gearbox having a multi-step main transmission and a trailing two-step range group. An input shaft of the main transmission is driven by a drive device. The main transmission and a range group have synchronization devices with shift clutches. Each synchronization device, for the main transmission, has two shift positions for respective gear ratio steps and a neutral position and the range group synchronization device has only two shift positions to shift between two gear ratios steps. To accelerate range shifts, when synchronizing the range group, the main transmission input shaft is synchronized by controlling external synchronization aids to a target rotational speed at which either after the synchronization and shifting of the gear ratio step of the range group or independently from the current synchronization condition of the range group, the target gear ratio is engaged in the main transmission.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: October 28, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Mario Steinborn, Roland Mair, Florian Schneider, Jochen Breuer
  • Patent number: 8862348
    Abstract: A method is described for operating a vehicle fitted with a continuously variable transmission (CVT) and having a lever for varying the transmission ratio of the CVT to permit the vehicle operator to vary the vehicle wheel speed. In the invention, the transmission ratio of the CVT is limited to a value dependent upon at least one of the prevailing engine speed and the rate of change of the engine speed.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: October 14, 2014
    Assignee: CNH Industrial America LLC
    Inventors: Riccardo Morselli, Massimo Baroni, Francesco Roli
  • Publication number: 20140296029
    Abstract: A power unit for a motorcycle includes an internal combustion engine with a transmission having an input shaft and an output shaft. A clutch with a hydraulic cylinder is provided for changing over the connection/disconnection of power transmission between a crankshaft and the input shaft. A cylinder support member, mounted on the engine body, includes a cylindrical case portion where a portion of the hydraulic cylinder is housed. The power unit can be miniaturized by suppressing the projection of the hydraulic cylinder from the engine body in the axial direction. A cover member is mounted on the engine body for covering and surrounding a projecting end portion of an output shaft from an engine body. A cylinder support member is mounted on the engine body such that a portion of a case portion is arranged in an opening portion formed by cutting away a portion of the cover member.
    Type: Application
    Filed: January 17, 2014
    Publication date: October 2, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Hodaka MUKOUHARA
  • Publication number: 20140296030
    Abstract: A transmission partly overlapping clutches as viewed from an axial direction of a crankshaft is disposed below an inclined cylinder axis of an engine main body. A speed change actuator is disposed in a position such that the transmission is interposed between the speed change actuator and the crankshaft. An exhaust pipe connected to a lower side wall of a cylinder head is extended so as to pass above the transmission and partly overlap an upper portion of the speed change actuator as viewed from the axial direction of the crankshaft.
    Type: Application
    Filed: March 11, 2014
    Publication date: October 2, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiro NORITA, Toshimasa MITSUBORI
  • Patent number: 8840525
    Abstract: Provided is a control apparatus for an internal combustion engine, which quietly restarts the engine with a reduced torque shock when a re-acceleration request is made by a driver.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: September 23, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Keiichi Enoki
  • Publication number: 20140274554
    Abstract: A method of carrying out coasting downshifts that involve an interlocking shifting element in an automatic transmission having a torque converter lockup clutch. At the beginning of the coasting downshift, positive action is taken on the torque. The method including the steps of, at the beginning of the coasting downshift, the torque converter lockup clutch is fully or partially disengaged so that the drive-train is fully or partially decoupled from the drive aggregate, and action upon the torque is carried out in such manner that the engine rotational speed only falls below the turbine rotational speed once the synchronous point for the interlocking shifting element is reached.
    Type: Application
    Filed: February 13, 2014
    Publication date: September 18, 2014
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventor: Christoph HESS
  • Publication number: 20140256507
    Abstract: A transmission control system can include a main transmission. The transmission control system can also include a sub transmission that has two forward transmission gears mechanically shiftable in response to a shift operation. The transmission control system can further include a controller that shifts the transmission gears of the main transmission by activating a shift control motor, and control the clutches configured to enable and disable transmission of a rotational driving force of an engine. When one forward transmission gear of the sub transmission is shifted to the other forward transmission gear in response to the shift operation, the controller can relax engagement of the clutch if an engine speed exceeds a clutch release speed.
    Type: Application
    Filed: February 21, 2014
    Publication date: September 11, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Naoki SAKAMOTO
  • Publication number: 20140235405
    Abstract: A vehicle drive system includes a transmission, a clutch, and a shift execution portion. The shift execution portion operates the shift actuator to control the connecting portion in an engaged state engaged with the idler gear of a present gear stage to disengage from the idler gear of the present gear stage while gradually decreasing the engine torque while the clutch is still engaged, when a shift operation from the present gear stage to a subsequent gear stage is executed.
    Type: Application
    Filed: February 20, 2014
    Publication date: August 21, 2014
    Applicant: Aisin Seiki Kabushiki Kaisha
    Inventors: Kyosuke MORI, Yasuhisa Iwasaki, Yoshihiro Murakami, Shinya Harada
  • Publication number: 20140228171
    Abstract: The present invention has an object to provide a vehicle control device which does not require a complicated operation to start an engine even if an idle-stop function has been executed. Thus, the present invention includes a mechanical automatic transmission, an idle-stop device (1) for stopping the engine when the vehicle is stopped, a slope detection device (2) for detecting a slope of a road, and a control unit (10), and is characterized in that the control unit (10) has a function for disengaging a clutch and selecting a gear appropriate for the detected slope, when the slope detected by the slope detection device (2) is at or above a threshold value and an operation of the idle-stop device (1) has been requested.
    Type: Application
    Filed: August 13, 2012
    Publication date: August 14, 2014
    Applicant: UD TRUCKS CORPORATION
    Inventor: Kunihiro Kaneko
  • Patent number: 8790218
    Abstract: Before the termination of the fuel-cut control, the vehicle control system reduces a pumping loss by increasing an air intake and a load torque of an auxiliary device thereby preventing the vehicle to be decelerated excessively, and after the termination of the fuel-cut control, the vehicle control system increases the load torque of the auxiliary device thereby preventing the vehicle to be accelerated abruptly. Therefore, the vehicle speed will not be lowered unnecessarily before the termination of the fuel-cut control so that an execution time of the fuel-cut control can be extended. Moreover, driving comfort can be improved by thus reducing a change in acceleration.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: July 29, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Junichi Morimura, Shinya Kodama, Satoru Niwa
  • Patent number: 8777808
    Abstract: A working vehicle control apparatus includes: a selection device that selects a power mode or an economy mode; a determination device that determines whether or not a speed restriction condition and a load pressure have been established; an engine rotational speed restriction device that restricts a maximum rotational speed of the motor upon selection of the economy mode to a lower speed side than a maximum rotational speed of the motor upon selection of the power mode when it is determined that the speed restriction condition has been established; and a vehicle speed restriction device that restricts a maximum vehicle speed upon selection of the economy mode to a lower speed side than a maximum vehicle speed upon selection of the power mode when it is determined that a speed restriction condition has not been established.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: July 15, 2014
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Koji Hyodo, Hiroki Nakazono, Hirofumi Oouchi, Atsushi Shimazu
  • Publication number: 20140187380
    Abstract: The torque assist system of the present invention includes a torque assist shaft having a first terminating part connected to the input shaft, an outer shaft and an inner shaft rotating independently from the outer shaft; a planetary gear set mounted on the inner shaft exposed to a second terminating part of the torque assist shaft; a clutch being disposed adjacent to the planetary gear set and operated by an external force; and an input gear mounted on the exposed inner shaft of the torque assist shaft and connected to the planetary gear set by the clutch to transmit power to an output gear mounted on the output shaft of the vehicle transmission.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 3, 2014
    Applicant: HYUNDAI WIA CORPORATION
    Inventors: Min Sik Choi, Jae Sik Park, Jae Woon Shin
  • Patent number: 8764606
    Abstract: An engine control module includes a deceleration fuel cutoff (DFCO) module, an actuator control module, and a rolling neutral (RN) module. The DFCO module determines whether to disable provision of fuel to an engine when a vehicle speed is greater than zero and selectively generates a DFCO signal based on the determination. The actuator control module disables the provision of fuel to the engine when the DFCO signal is generated. The RN module selectively generates an RN mode signal in response to a determination that the DFCO module is not generating the DFCO signal. The actuator control module controls the provision of fuel to the engine based on a desired engine speed when the RN mode signal is generated. A transmission control module disengages first and second input clutches of a dual clutch transmission (DCT) to decouple the DCT from the engine when the RN mode signal is generated.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: July 1, 2014
    Inventors: Richard A. Weaver, Kenneth K. Lang
  • Patent number: 8758197
    Abstract: A vehicle idle stop system is disclosed. The idle stop system comprises an engine, an automatic transmission, a first oil pump driven by said engine and generating hydraulic pressure which is supplied to a friction element of said automatic transmission, a second oil pump capable of operating and generating hydraulic pressure which is supplied to a friction element of said automatic transmission during an engine stop, and a controller. The controller is configured to control the engine to stop when a predetermined engine stop condition is satisfied, and to control the second oil pump to supply hydraulic pressure to a predetermined friction element coupled to a forward starting gear of the automatic transmission, the hydraulic pressure supplied to couple the predetermined friction element when the engine is automatically stopped and when a gear range of the automatic transmission is in a neutral range.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: June 24, 2014
    Assignee: Mazda Motor Corporation
    Inventors: Shinya Kamada, Motomi Kobayashi, Koshiro Saji
  • Patent number: 8744698
    Abstract: A vehicle includes an internal combustion engine, a transmission having a neutral state and an engaged state, and a controller. The controller is configured to determine a restart condition for the engine; and to classify the restart condition as one of: (i) a no wheel torque restart condition, and (ii) a wheel torque restart condition. The state of the transmission is set based on the restart condition classification, and the engine is started.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: June 3, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Ryan Abraham McGee, Ihab S. Soliman, Xiaoyong Wang
  • Patent number: 8725372
    Abstract: A method for adjusting the point of engagement of a friction clutch of a step-variable transmission for a motor vehicle, in particular a friction clutch of a dual clutch transmission. The friction clutch is controllably actuated by means of a clutch actuator and at least one synchronizer shifting clutch is controllably actuated by means of a shift actuator for the engagement and disengagement of a gear ratio of the spur-gear transmission. A set-point of the clutch actuator for the point of engagement of the friction clutch is adjusted as a function of a speed gradient value, which ensues from a transitional state with the friction clutch actuated and the shifting clutch actuated, once the shifting clutch is opened. The transitional state is established by setting the clutch actuator and the shift actuator to a respective transitional value substantially at the same time or, at least in sections, in parallel.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: May 13, 2014
    Assignees: GETRAG Getriebe-und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG, Bayerische Motoren Werke Aktiengesellschaft, Conti Temic microelectronic GmbH
    Inventors: Rainer Rinck, Markus Schuerlein, Tobias Soller
  • Publication number: 20140106931
    Abstract: Disclosed is a controller of a stepped automatic transmission. The stepped automatic transmission has a plurality of lock-up elements and performs downshift during coasting while an engine has a fuel cut-off state by changing over a pair of lock-up elements including an open side lock-up element and a lock-up side lock-up element. Downshift operation includes torque phase control and inertia phase control. The controller includes: a fuel cut-off recovery executing unit that is configured to perform recovery from the fuel cut-off state for an inertia phase control period; and a cylinder number restricting unit that is configured to restrict a count of cylinders recovered from the fuel cut-off state.
    Type: Application
    Filed: February 16, 2012
    Publication date: April 17, 2014
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tomoaki Honma, Masahiro Iriyama
  • Patent number: 8690728
    Abstract: A method for controlling a vehicle powertrain during launch includes controlling slip across a first clutch that transmits engine torque through the first clutch and the current gear while a transmission operates in a current gear other than a launch gear, disengaging the first clutch, engaging the launch gear, and controlling slip across a second clutch that transmits engine torque through the second clutch and the launch gear.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: April 8, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Chad E. Griffin, Bradley D. Riedle, Jeffrey M. Jarvi, James B. Keyse, Daniel T. Lin
  • Patent number: 8682535
    Abstract: A vehicle speed estimator includes a unit that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit includes: a variable filter processor that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor having a variable time constant; and a time constant changer that changes the time constant of the variable filter processor in accordance with travel conditions of the construction vehicle.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: March 25, 2014
    Assignee: Komatsu Ltd.
    Inventors: Koji Uematsu, Kazuhiro Hatake, Azumi Nomura