Speed Responsive Control Patents (Class 477/84)
  • Patent number: 9816608
    Abstract: A gear engagement method for a hybrid vehicle includes detecting whether or not baulking occurs when a controller attempts to engage a target gear via a synchronizer. The gear engagement method also includes checking, by the controller, for a stationary state of the vehicle if the result of the detecting shows that there is baulking. The gear engagement method also includes engaging, by the controller via the synchronizer, a different gear that shares a same input shaft with the target gear if the result of the checking shows that the vehicle is in a stationary state. The gear engagement method also includes reattempting an engagement with the target gear after disengaging the different gear. The disengaging and the reattempting are performed by the controller via the synchronizer after the engaging.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: November 14, 2017
    Assignee: Hyundai Motor Company
    Inventor: Jong Ho Lee
  • Patent number: 9440637
    Abstract: A transmission apparatus mounted on a vehicle has a front-wheel speed sensor for sensing a rotation speed of a front wheel. A control unit has a ratio-change correction part that determines a correction in transmission control of the transmission apparatus using the rotation speed of the front wheel sensed by a front-wheel speed sensor. The control unit limits execution of the correction under a condition that an external device is connected to a connector. Thereby, the execution of the correction based on the rotation speed of the front wheel without a worker's intention during driving on a chassis dynamo may be suppressed.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: September 13, 2016
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Tetsushi Saitoh
  • Patent number: 9057332
    Abstract: A start control system stores a map M1 that associates an accelerator position with an initial target speed of an engine and a map M2 that associates an accelerator position with a final target speed of the engine. If it is determined that a vehicle is in a start control period, a target speed of the engine is set to the initial target speed. When the engine speed reaches the initial target speed, the engine target speed is set to the final target speed. The initial target speed is set to a larger value than the final target speed for the same accelerator position.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: June 16, 2015
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Katsuhiro Arai
  • 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: 9005077
    Abstract: A hybrid transmission includes a transmission having a selectable clutch device effective when engaged to mechanically couple an internal combustion engine to a first axle at a fixed engine speed to axle speed ratio. A method for starting the engine includes executing an engine start event including spinning and fueling the engine such that an engine speed to axle speed ratio exceeds the fixed engine speed to axle speed ratio, and engaging said selectable clutch device after the engine speed to axle speed ratio exceeds the fixed engine speed to axle speed ratio.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: April 14, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Min-Joong Kim, Joseph M. Tolkacz, R Travis Schwenke, Randall B. Dlugoss
  • Patent number: 8968153
    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: Grant
    Filed: August 8, 2013
    Date of Patent: March 3, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Matthew John Shelton, Hong Jiang, Felix Nedorezov, Roger Lyle Huffmaster
  • Patent number: 8956265
    Abstract: A powertrain system includes an internal combustion engine, a multi-mode transmission and a driveline. A method for controlling the powertrain system in response to a command to execute an engine autostart operation during vehicle operation includes executing a clutch-driven engine autostart operation to start the engine upon determining that a present transmission output speed is greater than a minimum output speed for engine operation and upon determining that a selected clutch configured to effect a mechanical coupling between the engine and the driveline is activatable.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: February 17, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Poh Fong Chin, Jean Marie Miller, Allen J. Lehmen
  • Patent number: 8936532
    Abstract: A method and device for operating a dual clutch transmission connectable to an internal combustion engine provided in a vehicle includes providing a control unit for managing at least the internal combustion engine and the transmission, providing a prediction model including at least one simulated shift sequence for the transmission, predicting the time between a first power upshift/downshift and a second power upshift/downshift for the transmission by using the at least one prediction model, modifying at least one parameter for operating the transmission if the predicted time between the first power upshift/downshift and the second power upshift/downshift for the transmission is shorter than a predetermined time.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: January 20, 2015
    Assignee: Volvo Lastvagnar AB
    Inventors: Behrooz Razaznejad, Anders Eriksson, Johan Bjernetun
  • Patent number: 8880307
    Abstract: A coasting control device for avoiding dangerous modes such as tire lock up upon the end of coasting control. The device, which performs coasting control to disengage the clutch and to reduce the engine revolutions per minute (RPM), also prevents a gearshift operation during coasting control.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: November 4, 2014
    Assignees: Isuzu Motors Limited, Transtron Inc.
    Inventors: Nobuyuki Iwao, Yasushi Yamamoto, Kazuhiko Kobayashi, Hiroyuki Arai, Kouhei Takama
  • Patent number: 8870713
    Abstract: A driving force transmission apparatus includes a linkage mechanism that is able to carry out switchover between a connected state where a first intermediate shaft and a second intermediate shaft are connected to each other so as to be non-rotatable relative to each other to transmit torque output from an electric motor to a rear wheel, and a disconnected state where the first intermediate shaft and the second intermediate shaft are disconnected from each other. A control unit reduces the torque that is generated by the electric motor, after making a rotational speed of the first intermediate shaft higher than or equal to a rotational speed of the second intermediate shaft, and then switches the driving force transmission apparatus from the disconnected state to the connected state by controlling the linkage mechanism with the torque that is generated by the motor maintained at a reduced level.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: October 28, 2014
    Assignee: JTEKT Corporation
    Inventors: Kunihiko Suzuki, Keita Nomura
  • 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
  • Patent number: 8771143
    Abstract: In a hybrid power system, when a change-speed stage selected in one of gear-shift mechanisms for first and second drive trains is switched over to another change-speed stage in the other gear-shift mechanism, deceleration in rotation speed of an engine detected by a rotation speed sensor is compared with a preset upper limit. When the deceleration in rotation speed of the engine exceeds the upper limit, the motor-generator in drive connection with an input shaft of the second drive train is activated as an electric motor to cause load torque canceling or offsetting input torque applied to the input shaft of the other gear-shift mechanism from the engine, and engagement of the change-speed stage in the other gear-shift mechanism is released after the occurrence of the load torque.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: July 8, 2014
    Assignees: Aisin AI Co., Ltd., Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha
    Inventors: Toshio Tanba, Yuichi Fukuhara, Kan Sasaki, Sachio Toyora, Masahiro Omura
  • Publication number: 20140163827
    Abstract: A shift control method and system for a hybrid vehicle that may shorten shift-speed time and solve a problem in demand torque during shifting by performing pressure control, to perform connection synchronization control to a target shift-speed using speed control of a motor and to make at least one transmission clutch generate a driver's demand torque, while performing shift-control. The shift control method for a hybrid vehicle using power of an engine and/or power of a motor includes: controlling a pressure of at least one transmission clutch to shift to a target shift-speed; and controlling a speed of the motor for speeds at both ends of the at least one transmission clutch to be synchronized while being shifted to the target shift-speed.
    Type: Application
    Filed: August 22, 2013
    Publication date: June 12, 2014
    Applicants: KIA MOTORS CORPORATION, HYUNDAI MOTOR COMPANY
    Inventor: Sang Joon KIM
  • Patent number: 8721497
    Abstract: Disclosed therein is an automatic speed control system for a manual transmission. Clutch operating means using a combination of a motor and gears, transmission lever operating means using a combination of a motor and gears, and a control part, which check a driving state of a vehicle in real time and controls the motor if gear-shifting is needed, are additionally mounted to a general manual transmission, so that the general manual transmission can automatically shift the gear like an automatic transmission.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: May 13, 2014
    Assignee: Donghwan Ind. Corp.
    Inventor: Jung Ho Beak
  • 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
  • Patent number: 8696516
    Abstract: A control device for a vehicular drive system having (i) an engine, (ii) an electrically controlled differential portion operative to control an operating state of an electric motor connected to a rotary element of a differential mechanism for power-transmissive state for thereby controlling a differential state between a rotation speed of an input shaft connected to the engine, and a rotation speed of an output shaft, and (iii) a shifting portion forming a part of a power-transmitting mechanism between the electrically controlled differential portion and drive wheels, the control device including high-speed rotation preventing means for preventing high-speed rotations of each rotary elements of both the differential mechanism and the shifting portion, when a drop occurs or drop occurrence is predicted, in a supplied hydraulic pressure applied to a hydraulically operated frictional engaging device of the shifting portion, to a level less than a given value, wherein the high-speed rotation preventing means red
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: April 15, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Shibata, Tooru Matsubara, Atsushi Tabata, Masakazu Kaifuku, Hidenori Kato
  • Patent number: 8663067
    Abstract: A method of operating an automatic transmission of a motor vehicle. The automatic transmission, when the motor vehicle is driven with an actuated accelerator and an engaged starting clutch, and then coasts with the accelerator not actuated and the starting clutch engaged, during coasting with the engaged starting clutch the transmission remaining in the gear in which it was previously driven with the gas pedal actuated. When the transmission input speed of the automatic transmission drops below a limit value, during coasting, the starting clutch is disengaged. During coasting with a disengaged starting clutch in the automatic transmission, a gear is shifted that matches the current speed of the motor vehicle so that, when the starting clutch is subsequently engaged, a gear is available that matches the speed of the motor vehicle prevailing at the time the starting clutch is subsequently engaged.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: March 4, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Roland Mair, Florian Schneider
  • Patent number: 8657721
    Abstract: A powertrain system includes an engine control module that generates a negative torque transition signal based on a pending negative torque event of an engine. A transmission control module receives the negative torque transition signal from the engine control module. The transmission control module increases a slip speed of a torque converter clutch in preparation for the pending negative torque event by adjusting pressure in the torque converter clutch prior to the pending negative torque event. The transmission control module decreases the slip speed in the torque converter clutch based on completion of a transition at least one of to the pending negative torque event and from the pending negative torque event.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: February 25, 2014
    Inventors: Christopher E. Whitney, Jeremy V. Horgan, Scott A. Hearld, Lars Mikael Buur, Ryan Goode, Krishnendu Kar
  • Publication number: 20140031171
    Abstract: A powertrain system includes an internal combustion engine, a multi-mode transmission and a driveline. A method for controlling the powertrain system in response to a command to execute an engine autostart operation during vehicle operation includes executing a clutch-driven engine autostart operation to start the engine upon determining that a present transmission output speed is greater than a minimum output speed for engine operation and upon determining that a selected clutch configured to effect a mechanical coupling between the engine and the driveline is activatable.
    Type: Application
    Filed: July 25, 2012
    Publication date: January 30, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Poh Fong Chin, Jean Marie Miller, Allen J. Lehmen
  • Patent number: 8527175
    Abstract: A braking/driving control apparatus for a vehicle includes a basic control unit which calculates and outputs a target axle torque based on a target acceleration and a driving resistance of the vehicle and which determines an axle torque for a power train of the vehicle and an axle torque for a braking apparatus of the vehicle based on the calculated target axle torque, a sliding-down prediction determining unit which determines whether there is a possibility that the vehicle slides down rearwards on an uphill road, and a sliding-down preventing process executing unit which performs a process for reducing a possibility that the vehicle slides down, based on a determination result of the sliding-down prediction determining unit.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: September 3, 2013
    Assignees: Advics Co., Ltd., DENSO CORPORATION
    Inventors: Masayoshi Takeda, Masaki Maruyama, Yukio Mori, Kazuya Taniguchi, Daisuke Tokumochi
  • Patent number: 8494711
    Abstract: An automated start/stop system for a vehicle comprises an auto-stop module, a diagnostic module, and an auto-start module. The auto-stop module selectively initiates an auto-stop event and shuts down an engine while the vehicle is running. The diagnostic module selectively diagnoses a fault in a clutch pedal position sensor of the vehicle. The auto-start module, while the vehicle is running and the engine is shut down, selectively initiates an auto-start event after the fault has been diagnosed when current drawn by a starter motor is less than a predetermined maximum starting current.
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: July 23, 2013
    Inventors: Awadesh Tiwari, Vijay Shettigar, Amit Kumar, Srinivas B. Chande
  • Publication number: 20130116906
    Abstract: The invention relates to a method and a device for operating a motor vehicle with an internal combustion engine in a coasting operating mode in which the motor vehicle rolls essentially in a propulsionless fashion and essentially without a perceptible engine drag torque on an essentially level road if there is no propulsion request or braking request from a driver of the motor vehicle. According to the invention, the coasting operating mode is not brought about by automatically opening the drivetrain but rather is simulated with the clutch closed in that so much air/fuel mixture is fed to the internal combustion engine that the engine drag torque is largely but not completely compensated.
    Type: Application
    Filed: September 21, 2012
    Publication date: May 9, 2013
    Inventors: Urs Christen, Andreas R. Schamel, Goetz-Philipp Wegner, Uwe Gussen
  • Patent number: 8409054
    Abstract: An overspeed system for a vehicle is disclosed. The overspeed system may have a power source, a transmission unit, and a torque converter assembly operatively coupling the power source to the transmission unit. The overspeed system may also have a travel speed sensor configured to generate a signal indicative of a vehicle speed, and a controller in communication with the torque converter assembly and the travel speed sensor. The controller may be configured to prevent a decoupling of the torque converter assembly in response to the signal.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: April 2, 2013
    Assignee: Caterpillar Inc.
    Inventor: Hong-Chin Lin
  • Publication number: 20130072349
    Abstract: Disclosed therein is an automatic speed control system for a manual transmission. Clutch operating means using a combination of a motor and gears, transmission lever operating means using a combination of a motor and gears, and a control part, which check a driving state of a vehicle in real time and controls the motor if gear-shifting is needed, are additionally mounted to a general manual transmission, so that the general manual transmission can automatically shift the gear like an automatic transmission.
    Type: Application
    Filed: December 30, 2010
    Publication date: March 21, 2013
    Applicant: DONGHWAN IND. CORP.
    Inventor: Jung Ho Beak
  • Patent number: 8380403
    Abstract: A vehicle including an internal combustion engine and a stepped transmission including an input shaft and an output shaft, wherein the stepped transmission speed-changes power input to the input shaft while changing a shift speed and outputs the speed-changed power to the stepped transmission output shaft; a control unit that controls the engine and the stepped transmission in accordance with an output request from an operator. The vehicle also including input and output shaft rotation speed detecting units and an output limiting unit that limits the output of the engine by comparing the deviation of the input and output shaft rotation speed to a predetermined rotation speed relationship range. The vehicle also including an abnormality determining unit to determine that an abnormality has occurred in the stepped transmission when the rotation speed relationship exceeds the range of the predetermined rotation speed relationship for at least a first predetermined time period.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: February 19, 2013
    Assignee: Aisin AW Co., Ltd.
    Inventor: Hideaki Ogasawara
  • Patent number: 8352136
    Abstract: A vehicle control system for an engine-powered vehicle equipped with an engine and an automatic transmission with a clutch. When a given engine stop requirement is met during running of the engine, the system stops the engine automatically. When a given engine restart requirement is met after stop of the engine, the system restarts the engine and enters a clutch control mode to bring the clutch in the automatic transmission into a slippable state in which the clutch is permitted to slip based on the speed of the vehicle, thereby absorbing the acceleration shock which usually occurs upon engagement of the clutch to transmit engine torque to wheels of the vehicle when the engine is restarted, and the speed of the vehicle is relatively low.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: January 8, 2013
    Assignee: Denso Corporation
    Inventor: Tatsuya Saito
  • Publication number: 20130005531
    Abstract: A shift control system and method for a vehicle equipped with an automated manual transmission is disclosed herein. In the shift control system, upon determining that shifting has started and a clutch has been released, an engine speed is reduced by fully opening a valve of a hydraulic cooling unit when. The engine speed is then synchronized with an input shaft speed and the clutch is rejoined once the engine speed is synchronized with the input shaft speed.
    Type: Application
    Filed: November 18, 2011
    Publication date: January 3, 2013
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Byung Jun Sung, Sang Pil Jang
  • Patent number: 8306714
    Abstract: A start permission decision section issues a start permission when an engine speed and a throttle valve opening become higher than predetermined values. A clutch-torque capacity storage section stores a clutch-torque capacity reference map in which a clutch-torque capacity is set as a function of at least the engine speed or as a function of the engine speed and the throttle valve opening. A clutch-torque capacity correction section corrects the clutch-torque capacity reference map so that the clutch-torque capacity is proportionally reduced in response to the difference between the engine speed and a start permission speed when a start permission is issued. An oil pressure controlling section connects the clutch with the clutch-torque capacity obtained in accordance with the corrected clutch-torque capacity map to start the vehicle.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: November 6, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yoshiaki Nedachi, Hiroyuki Kojima, Kazuyuki Fukaya, Takashi Ozeki, Taito Kobayashi
  • Patent number: 8306711
    Abstract: A vehicle is provided with a shift control device including a rolling angular velocity sensor for detecting a rolling angular velocity of a component of the vehicle, and a steering-angle angular velocity sensor for detecting a steering-angle angular velocity of a handlebar of the vehicle. The shift control device is operable to inhibit shifting of a gear ratio of a continuously variable transmission during rolling operation of the vehicle when detection signals from the rolling angular velocity sensor and the steering-angle angular velocity sensor respectively are equal to or greater than predetermined reference values.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: November 6, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Osamu Suzuki, Kaoru Hatanaka, Syunichi Miyagishi
  • Patent number: 8301351
    Abstract: A parameter ?(OUT) having an accelerator pedal position, a vehicle speed and a drive force as components is set according to information representing a driver's operation and information representing running environment of a vehicle. A gear is set according to the parameter ?(OUT) and a map determining the gear based on the accelerator pedal position, the vehicle speed and the drive force. A gear shift line is defined such that a rate of increase of the drive force with respect to the vehicle speed is zero or more. A down-shift line is defined such that the drive force decreases with increase in accelerator pedal position. Down-shift after up-shift as well as the up-shift after the down-shift are inhibited when both a condition that an amount of change of the accelerator pedal position after last gear shift is larger than a threshold and a condition that an amount of change of the drive force after the last gear shift is larger than the threshold are satisfied.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: October 30, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa
  • Publication number: 20120238405
    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: Application
    Filed: May 30, 2012
    Publication date: September 20, 2012
    Applicant: 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
  • Publication number: 20120208673
    Abstract: A multi-ratio rotorcraft drive system and a method of changing gear ratios thereof are disclosed. According to one embodiment, the multi-ratio rotorcraft drive system comprises a rotor system comprising one or more rotors and one or more engines. Each engine of the one or more engines is coupled to the rotor system through a multi-ratio transmission. The multi-ratio transmission comprises an output shaft coupled to the rotor system, an input shaft coupled to a respective engine of the one or more engines, a high speed clutch integrated into a high speed gear train, and a low speed clutch integrated into a low speed gear train. The high speed clutch and the low speed clutch are freewheeling clutches without a friction plate and are capable of disconnecting the output shaft and the input shaft in an overrunning condition when the output shaft spins faster than the input shaft.
    Type: Application
    Filed: March 12, 2012
    Publication date: August 16, 2012
    Inventors: Ryan T. Ehinger, Carlos A. Fenny, Charles J. Kilmain, Eric A. Sinusas, Kevin Worrell
  • Patent number: 8165766
    Abstract: A method for controlling a vehicles drivetrain including an engine and automatic transmission, such that transmission ratios are shifted within a range of transmission ratios in a continuous and/or stepped manner as function of preset target speeds that are adjustable via a vehicle speed control and actual vehicle inclinations in relation to the vehicles longitudinal axis. When the actual speed of the vehicle differs from a preset threshold speed, a request to change an actual ratio of the transmission is generated, if it has been determined that the output torque is smaller than a threshold value or an output torque required to adjust the preset threshold speed of the vehicle. The ratio of the transmission is shifted so the torque applied to the output is modified toward the output torque required to adjust the threshold speed.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: April 24, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Norbert Müller, Franz-Josef Schuler, Clemens Kuhn
  • Patent number: 7953534
    Abstract: The invention relates to a vehicle integrated-control apparatus and method that sets a final control target by coordinating a control target primarily set based on an input of a driver with instruction values from the control systems; and that causes a drive control system to control a drive source and a stepped automatic transmission to achieve the final control target. With this apparatus and method, at least one of the control systems, which provide instruction values to be coordinated with the primarily set control target, is notified of a range of control targets that can be achieved at a current shift speed; a range of control targets that can be achieved by changing the current shift speed to a currently achievable shift speed; and a range of control targets that can be achieved without changing the current shift speed to another shift speed.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: May 31, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa
  • Publication number: 20100261577
    Abstract: A method for controlling a gear shift of a dual clutch transmission having an offgoing clutch and an oncoming clutch, includes using torque transmitted by the oncoming clutch to control torque at a transmission output, using a speed of a power source to control a transfer of torque between the offgoing clutch and the oncoming clutch, and varying said torque capacity to produce a target slip across the oncoming clutch when the shift is completed.
    Type: Application
    Filed: April 9, 2009
    Publication date: October 14, 2010
    Inventors: Kevin MacFarlane, Brian Keyse, Eileen A. Davidson, David Orton, Thomas R. Langeland
  • Publication number: 20100137101
    Abstract: A shift control method of an automatic transmission controls a skip shift from a first shift-speed achieved by engagements of first and second frictional elements to a second shift-speed achieved by engagements of third and fourth frictional elements, wherein the engagements of the third and fourth frictional elements is controlled after completion of releases of the first and second frictional elements.
    Type: Application
    Filed: July 20, 2009
    Publication date: June 3, 2010
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Byeong Wook JEON
  • Patent number: 7674204
    Abstract: A control device for an automatic gearbox, coupled to the engine or a motor vehicle, by a torque converter, including a locking device for a fixed connection of the output shaft of the engine to the input shaft of the automatic gearbox, to produce a lock-up and conversely to release the lock-up. The device further includes an engine control unit, for providing an order for the engine, such as a demand for torque, and a control unit for the gearbox for transmitting to the engine control unit an order such as a torque request. The gearbox control unit may transmit to the engine control unit a torque request as a function of slip and the torque value as demanded by the driver of the vehicle such that the speed of the engine may approach the speed of a turbine of the torque converter so that a lock-up or lock-up release can be carried out.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: March 9, 2010
    Assignee: Renault S.A.S.
    Inventors: Thomas Turpin, Laurent Caniez
  • Publication number: 20100023230
    Abstract: A transmission has an input member and an output member, first and second intermediate shafts having substantially identical gear sets with gears concentric with and selectively connectable for rotation with the first and second intermediate shafts, respectively. Output gears are concentric with and rotatable with the output member and mesh with the substantially identical gear sets. First and second torque-transmitting devices are operable for transmitting torque from the input member to the first and second intermediate shafts, respectively. Torque-transmitting mechanisms are mounted concentric with, rotatable about and selectively engagable with the gears mounted on the intermediate shafts. A controller is operatively connected to the torque-transmitting mechanisms and to at least one of the torque-transmitting devices.
    Type: Application
    Filed: July 28, 2008
    Publication date: January 28, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventor: Alan G. Holmes
  • Publication number: 20090227419
    Abstract: A transmission system including a selector assembly (27,29,31) arranged to select between gear ratios instantaneously without substantial power interruption, said selector assembly (27) including first and second sets of engagement members (35,36) and an actuator system (38) having a first actuator member (48) for moving the first set of engagement members (35), a second actuator member (58) for moving the second set of engagement members (36), a first actuator device (46) for actuating the first actuator member (48) and a second actuator device (64) for actuating the second actuator member (58) independently of the first actuator device (46).
    Type: Application
    Filed: May 11, 2007
    Publication date: September 10, 2009
    Applicant: ZEROSHIFT LIMITED
    Inventors: William Wesley Martin, Anthony Joseph Child
  • Patent number: 7529607
    Abstract: A method for controlling selection of an automatic transmission gear ratio with staged ratios or constant variation for a vehicle including a control for preventing/allowing extension of the gear ratio or for controlling a shortening the transmission gear ratio if, at a current engine speed, the power is insufficient for maintaining the vehicle speed. The method prevents extension of the transmission gear ratio if the power available after the extension is insufficient for maintaining the vehicle speed; otherwise allowing extension of the transmission gear ratio.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: May 5, 2009
    Assignee: Renault S.A.S.
    Inventor: Olivier Aubert
  • Patent number: 7470215
    Abstract: A drivetrain including a primary clutch and a secondary clutch is well-suited for use in a single-speed vehicle. The primary clutch may be automatically-engaging or manually-engaging. The secondary clutch, preferably, is normally engaged and is configured to disengage, or slip, at a threshold torque level. Desirably, the slip torque level of the secondary clutch is configured to be greater than the peak engine torque of the vehicle such that disengagement of the secondary clutch due to engine-supplied torque does not occur.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: December 30, 2008
    Assignee: Cobra Motorcycle Mfg., Inc.
    Inventors: Bud Maimone, Alexis Uspenski
  • Patent number: 7361120
    Abstract: A lock-up clutch control device which controls a lock-up clutch (6) provided in a torque converter (5) interposed between an engine (3) and a transmission (4) used with a vehicle, is disclosed. The lock-up clutch control device has a differential pressure generating device (7,8), a vehicle speed sensor (13), a throttle valve opening sensor (14), an transmission input shaft rotation speed sensor (16), engine torque detection means (2), and a controller (1). The controller (1) determines, based on the detected vehicle speed (VSP) and the detected throttle valve opening (TVO), whether or not a control region of a torque converter is a converter region wherein control is performed to disengage the lock-up clutch.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: April 22, 2008
    Assignee: Jatco Ltd
    Inventors: Toshiji Iida, Hiroshi Sekiya, Morimasa Yamawaki, Tatsuya Imamura, Koji Dohi, Kouji Saitou
  • Patent number: 7291092
    Abstract: In shift control apparatus and method for an automatic transmission in which an engine speed is inputted, and a shift change in a shift stage of the automatic transmission is performed to make a gear shift, a shift revolution synchronization control in synchronization with the engine speed is performed and, in a case where the gear shift is made under a driving state in which there is a possibility of an occurrence of a shift shock, an engagement section which performs a power transmission under a presently selected shift stage is gradually released and another engagement section which enables a power transmission through the next selection scheduled shift stage is gradually engaged without an execution of the shift revolution synchronization control.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: November 6, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yuzuru Tohta, Kenichiro Murakami
  • Patent number: 7282009
    Abstract: A lock-up clutch control device, which controls a lock-up clutch (6) installed in a torque converter (5) interposed between an engine (3) and a transmission (4) used with a vehicle, is disclosed. The lock-up clutch control device has a differential pressure generating device (7,8) which engages or disengages the lock-up clutch by adjusting a differential pressure supplied to the lock-up clutch, a sensor (13) which detects a vehicle speed, and a controller.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: October 16, 2007
    Assignee: Jatco Ltd
    Inventors: Hiroshi Sekiya, Tatsuya Imamura, Koji Dohi, Kouji Saitou
  • Patent number: 7252621
    Abstract: A transmission having plural clutches includes a first clutch for connecting and disconnecting transmission of driving force to a first input shaft including a driving gear configured to be engaged with a driven gear provided at an output shaft of the transmission driven by a driving force generating device, a second clutch operating independently from the first clutch for connecting and disconnecting transmission of driving force to a second input shaft including a driving gear configured to be engaged with a driven gear provided at the output shaft, a driving force detection device for detecting driving force, a slip detection device for detecting physical quantity related to a slip of a driving wheel, and a device for controlling the second clutch for importing the physical quantity related to the slip and the driving force and for controlling engagement ratio of the second clutch where the first clutch is engaged.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: August 7, 2007
    Assignee: Aisin Ai Co., Ltd.
    Inventors: Toshio Tanba, Shiro Ogami
  • Patent number: 7029422
    Abstract: This invention will therefore provide a tool to assist the rig operator in perfecting his/her rig operation skills. Disclosed herein is an apparatus and method for minimizing slippage on the drum clutch of a well service rig. A detector senses the motion of the compound when the clutch is initially engaged. If the momentum is above an acceptable level, an alarm sounds, notifying the operator to be smoother with the clutch. A tracking mechanism is disclosed so that a rig supervisor or safety person can critique the operator on the smoothness of the rig operation.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: April 18, 2006
    Assignee: Key Energy Services, Inc.
    Inventors: Frederic M. Newman, Kevin Northcutt
  • Patent number: 6939265
    Abstract: A method of controlling a motor vehicle with an automated clutch is provided and includes the steps of: (a) detecting the vehicle speed, (b) detecting if the brake and/or the gas pedal is actuated, (c) detecting whether or not the engine is running, (d) disengaging the clutch if the engine is found to be running while the vehicle is found to be moving faster than a threshold speed, and if at the same time neither the brake nor the gas pedal is found to be actuated, and (e) subsequently re-engaging the clutch if the brake and/or gas pedal is found to be actuated. Prior to re-engaging the clutch, a transmission input rpm-rate is determined, and an engine rpm-rate is controlled in such a manner that that the respective rpm-rates of the engine and the transmission are brought towards a closer agreement.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: September 6, 2005
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Carsten Rustige, Klaus Küpper, Martin Zimmermann, Martin Vornehm
  • Patent number: 6860834
    Abstract: A controller (12) controls the engaging force of a lockup clutch (2c) connecting an engine (1) and an automatic transmission (3) via an engaging force regulating mechanism (11, 13). The controller (12) sets a target relative rotation speed (?SLPT) according to a difference between a target engine rotation speed (TGT_EREV) and an input rotation speed (PriREV) of the automatic transmission (3). When an initial engine rotation speed (ST_EREV) is smaller than the target engine rotation speed (TGT_EREV), the controller (12) causes the target relative rotation speed (?SLPT) to gradually vary from an initial relative rotation speed (ST_SREV) to a predetermined target change-over relative rotation speed (CHG_REV). By controlling the engaging force regulating mechanism (11, 13) on the basis of the target relative rotation speed (?SLPT) set in this way, a prompt and appropriate lockup operation of the lockup clutch (2c) is realized in response to the vehicle conditions.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: March 1, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Satoshi Segawa, Kazutaka Adachi
  • Patent number: 6835161
    Abstract: A method for changing gear in an automated change-speed gearbox of a motor vehicle with an automated clutch arranged between an engine and the change-speed gearbox includes engaging the clutch up to a slip limit during a downshift from an original gear to a target gear to increase the rotational speed of an input shaft of the change-speed gearbox.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: December 28, 2004
    Assignee: DaimlerChrysler AG
    Inventors: Martin Grillenberger, Markus Heinzel, Michael Salecker, Friedo Tinschert, Dittmar Wieland
  • Publication number: 20040102287
    Abstract: A method of and an arrangement for preventing a shift of the reference position of a clutch which is operated by an actuator and is installed in the power train of a motor vehicle. Such shift of reference position can be caused in response to axial displacements between the input and output shafts of the clutch. The method includes the steps of routinely ascertaining the reference position, memorizing and thus actualizing the information pertaining to the ascertained reference position, ascertaining an operational parameter which is the cause of axial displacements between the input and output shafts of the clutch, and altering the routine determination and the memorizing of the reference position when the operational parameter exceeds a predetermined threshold value.
    Type: Application
    Filed: September 18, 2003
    Publication date: May 27, 2004
    Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KG.
    Inventors: Thomas Eggert, Jens Martin