Transmission Pressure Controlled Patents (Class 477/156)
  • Patent number: 11370413
    Abstract: A control system for a hybrid vehicle configured to limit a thermal damage to a starting clutch without generating a shock. The control system is applied to a vehicle in which a prime mover includes an engine, a first motor, and a second motor. In the vehicle, the first motor is connected to the engine, and a first clutch and a second clutch are disposed between the engine and drive wheels. A controller executes a transient slip control to cause the second clutch to slip while bringing the slipping first clutch into complete engagement if a temperature of the first clutch is high. If an engine speed is changed during execution of the transient slip control, the first motor generates a collection torque to suppress the change in the engine speed.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: June 28, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Junya Mizuno, Hideo Watanabe, Toshiyuki Tomita, Masami Kondo
  • Patent number: 11294656
    Abstract: The present disclosure discloses a system and a method for developing a third-party application. The system includes: a vehicle-mounted device and a developer platform communicating with each other. The vehicle-mounted device generates a corresponding API according to a protocol analysis mode of a vehicle signal and API specifications, adds the API to a software development kit SDK, and sends the API to the developer platform. The developer platform publishes the SDK so that a developer can develop a third-party application according to the API in the SDK.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: April 5, 2022
    Assignee: BYD Company Limited
    Inventors: Yang Liu, Hua Huang, Qun Liang, Chunfen Wu, Yilin Zhong
  • Patent number: 11097732
    Abstract: Systems and methods for operating a driveline of a hybrid vehicle are described. In one example, vehicle launch is controlled according to a linear quadratic regulator that provides feedback control according to torque converter slip error and vehicle speed error. The vehicle launch is also controlled according to feed forward control that is based on requested torque converter slip and requested vehicle speed.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: August 24, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Weitian Chen, Zhengyu Dai, Hong Jiang
  • Patent number: 10760680
    Abstract: In a hydraulic control device, a state determination unit of a control unit determines whether a second pump is in a boosting operation or in a transition state. If the state determination unit has determined that the second pump is in the boosting operation or in the transition state, a valve-opening detection unit determines whether a check valve is opened. If the valve-opening detection unit has determined that the check valve is opened, a controller stops the second pump or decreases the rotation number of the second pump.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: September 1, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Masamichi Harada, Makito Nakasone
  • Patent number: 10393232
    Abstract: A method of operating a motor vehicle transmission includes measuring an operating temperature of the transmission, the transmission having at least seven torque transmitting mechanisms and at least three planetary gear sets, each planetary gear set having three gear members; determining if the transmission is in a park mode; determining if the operating temperature is below a predetermined threshold; if the operating temperature is below the predetermined threshold and the transmission is the park mode, implementing a shift delay mitigation process that includes engaging a fourth torque transmitting mechanism and a firth torque transmitting mechanism of the at least seven torque transmitting mechanisms so that they are locked to a ground to prevent a first gear member of the first planetary gear set from moving, which, in turn, prevents an input torque being transferred to a park pawl.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: August 27, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David C. Webert, Todd R. Berger
  • Patent number: 10183674
    Abstract: A vehicle includes a step-ratio automatic transmission having clutches engageable to provide forward and reverse gears, an electric machine selectively coupled to the transmission, a main pump powered by the electric machine and supplying oil to actuate selected transmission clutches, a gear selector configured for selecting a transmission gear, and a controller configured to stop the electric machine when the gear selector selects park or neutral, to operate the electric machine in a speed control mode using a higher controller gain in response to the gear selector selecting forward or reverse while the electric machine is stopped until the electric machine and the main pump reach a first speed threshold to reduce engagement delay of at least one of the transmission clutches, and to operate the electric machine using a lower controller gain when the electric machine and the main pump exceed the first speed threshold.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: January 22, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Xiaoyong Wang, Rajit Johri, Mark Steven Yamazaki, Jeffrey Allen Doering, Ming Lang Kuang, Wei Liang
  • Patent number: 10174833
    Abstract: A transmission control system of a vehicle includes an estimated acceleration module and a pressure control module. The estimated acceleration module determines an estimated longitudinal acceleration of the vehicle based on a force at axles of the vehicle corresponding to engine torque, a braking force imposed by mechanical brakes of the vehicle, an aerodynamic drag force of the vehicle, and a road load force imposed on the vehicle by contact between tires of the vehicle and a road surface. The pressure control module, when a measured longitudinal acceleration of the vehicle is negative and the estimated longitudinal acceleration is greater than the measured longitudinal acceleration of the vehicle, adjusts transmission fluid pressure applied to one or more clutches of the transmission and shifts the transmission to neutral.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: January 8, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Greg J. Perantoni, Brian J. Pellerito
  • Patent number: 10012308
    Abstract: An apparatus for controlling an electric oil pump (EOP) includes a controller calculating first revolutions per minute (RPM), second RPM and third RPM, the first RPM being EOP RPM required for control of a brake in a transmission, the second RPM being EOP RPM required for cooling of a plurality of motors, and the third RPM being EOP RPM required for lubrication of the plurality of motors, the controller comparing the second RPM with the third RPM and driving the EOP at an RPM obtained by adding the first RPM to the greater of the second RPM and the third RPM.
    Type: Grant
    Filed: July 3, 2016
    Date of Patent: July 3, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sang Lok Song, June Ho Lee, Jong Hyun Kim, Young Chul Kim, Hak Sung Lee, Seung Jae Kang, Gyeong Cheol Kim, Kyoung Joo Kim, Yoh Han Kim
  • Patent number: 9969256
    Abstract: The invention relates to a hybrid module including a clutch, an electric machine, an internal combustion engine end, a transmission end, and a housing that includes a radially extending housing section located axially next to the electric machine at the internal combustion engine end as well as an axially extending housing section surrounding at least part of the hybrid module; the housing has two separate parts, the first one of which forms the radially extending housing section and the second one of which forms the axially extending housing section. The invention further relates to a method for manufacturing a hybrid module of this type.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: May 15, 2018
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Stefan Mackowiak, Matthias Eisele, Robert Maier
  • Patent number: 9933067
    Abstract: An automatic transmission fluid (ATF) warmer coolant circulation system may include an ATF warmer connected to an engine oil cooler, in which engine coolant is circulated to the ATF warmer to preheat automatic transmission fluid of a transmission below an operation temperature of the ATF warmer.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: April 3, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Chi-Weon Jeong, Hyo-Chan Bae, Young-Bae Yang, Young-Jin Choi, Joong-Su Yun, Ki-Lyong Jang, Seung-Ho Mok, Kwang-Weon Ahn
  • Patent number: 9845869
    Abstract: A mechanical oil pump, an electric oil pump, and a strainer are disposed inside a transmission case. As a suction oil passage that returns an excess hydraulic pressure in a hydraulic control device to the mechanical oil pump, a common oil passage extending from the hydraulic control device, a branch point, a first oil passage extending from the branch point to the mechanical oil pump, and a second oil passage extending from the branch point to the electric oil pump are formed in the transmission case. A meeting point where an inlet oil passage for suctioning oil via the strainer and the first oil passage of the suction oil passage meet is formed inside a pump body of the mechanical oil pump. Accordingly, the suction oil passage of the mechanical oil pump and an inlet oil passage of the electric oil pump have a portion in common.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: December 19, 2017
    Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Haruki Shirasaka, Yuji Iwatsuru, Tetsuya Maruyama, Kozo Yamamoto, Hirofumi Nakada
  • Patent number: 9829090
    Abstract: A regulator valve regulates pressure of transmission fluid applied to a clutch of a transmission and a flow rate of the transmission fluid from the regulator valve to a transmission fluid sump. A transmission fluid pump is driven by an engine of the vehicle. A control module, while an ignition system of the vehicle is ON, selectively shuts down the engine of the vehicle for an auto-stop event. A target pressure module, before an engine speed reaches zero for the auto-stop event, increases a target value of a pressure of the transmission fluid at an output of the transmission fluid pump. A regulator control module, before the engine speed reaches zero for the auto-stop event and based on the increase in the target value of the pressure, adjusts the regulator valve to increase the pressure of the transmission fluid at the output of the transmission fluid pump.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: November 28, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Randall B. Dlugoss, Karl Andrew Sime
  • Patent number: 9810318
    Abstract: A method for controlling an electric oil pump (EOP) of a torque assist automated manual transmission (AMT) using a multi-plate wet clutch and a dry clutch, may include correcting an EOP operating line on a shifting pattern graph such that the EOP operates prior to up-shifting from a first gear to a second gear while driving in the first gear.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: November 7, 2017
    Assignee: Hyundai Motor Company
    Inventor: Young Min Yoon
  • Patent number: 9784149
    Abstract: An oil strainer which sucks an oil is disposed within an oil pan connected to a lower portion of a combustion engine. The oil strainer includes a strainer main body, which accommodates a filter element and extends so as to be inclined relative to a horizontal line, a suction port formed in a lower portion of the strainer main body, and a discharge port formed in an upper portion of the strainer main body.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: October 10, 2017
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Yoshiharu Matsuda, Kazuki Arima, Yasushi Ishibashi, Shingo Tanimoto
  • Patent number: 9784367
    Abstract: While a vehicle is traveling in a state where any one of gear positions of a mechanical stepped transmission unit is established, until an estimated input torque that is obtained from the equation of motion for an electrical differential unit changes, a hydraulic pressure of a non-engaged intended hydraulic friction engagement device is increased, and a pack end pressure is learned on the basis of the hydraulic pressure at that time. Therefore, irrespective of feedback control, or the like, over motor generators of the electrical differential unit, it is possible to appropriately learn the pack end pressure, so it is possible to appropriately execute hydraulic control over the hydraulic friction engagement devices, that is, engaging and releasing control, or the like, at the time of shifting, irrespective of individual differences of the portions, aging of friction materials, or the like.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 10, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takaaki Tanaka, Nobufusa Kobayashi, Masato Yoshikawa
  • Patent number: 9168913
    Abstract: An oil pump system of a hybrid vehicle may include an electric oil pump which supplies operating hydraulic pressure to the transmission based on a speed command; a data detector which detects data for controlling the electric oil pump; and a controller which sets a driving mode of the electric oil pump based on the data detected by the data detector, determines a basic flow rate of the set driving mode, determines a final flow rate by compensating for the basic flow rate, and applies the speed command to the electric oil pump, in which the operating hydraulic pressure is supplied to the transmission only by the electric oil pump, and the speed command is determined based on target hydraulic pressure, an oil temperature, and the final flow rate.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: October 27, 2015
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Haksung Lee, SangLok Song, Ki Nam Kim, Seung Hyun Yang, Jong Ho Lee, Jong Hyun Kim, Jaeshin Yi, Jang Mi Lee
  • Patent number: 9091329
    Abstract: A method for controlling a transmission includes the following steps: applying a first assist clutch to interconnect a first stationary member to a first planetary gear set of the transmission; applying a second assist clutch to interconnect a second stationary member to a second planetary gear set of the transmission, wherein the second planetary gear set is coupled to the output member of the transmission; applying a primary clutch to interconnect the first planetary gear set to a third stationary member; reducing a first pressure applied to the first assist clutch of the transmission by a first pressure calibration value; determining whether a gear lash has occurred; and reducing a second pressure applied to the second assist clutch of the transmission.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: July 28, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Paul G. Otanez
  • Patent number: 9028355
    Abstract: A control apparatus for an automatic transmission including three frictional engagement elements is configured to set engagement pressures of first and second frictional engagement elements at the time when a predetermined shift speed is established such that a torque capacity of a third frictional engagement element becomes smaller than torque capacities of the first and second frictional engagement elements in the case where an engagement pressure is generated in the third frictional engagement element at the time when the predetermined shift speed is established.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: May 12, 2015
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.
    Inventors: Masakazu Owatari, Nobutada Saitou, Shinei Takata
  • Patent number: 8968154
    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: Grant
    Filed: May 24, 2012
    Date of Patent: March 3, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Poh Fong Chin, Jean Marie Miller, Allen J. Lehmen, Valerie Zelko Byrd
  • Patent number: 8948985
    Abstract: A shift control device for a motorcycle includes a transmission that allows switching between a neutral state and a number of engaged shift positions, a shift control section that controls a shift state of the transmission, and an N/D changeover switch that switches between the neutral state and a drive mode for executing automatic shift among the plural shift positions. The shift control device also includes a hand-operated shift switch that allows manual shifting among the plural shift positions, and a foot operated shift control unit that allows manual shifting among the plural shift positions during the drive mode according to an operation of a shift pedal. The N/D changeover switch and the hand-operated shift switch are arranged around a handlebar of the motorcycle. The shift control section is operable to switch between the neutral state and the drive mode by the foot operated shift control unit.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: February 3, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Naoki Sakamoto, Kenichi Machida, Makoto Tsuyuguchi, Satoru Okoshi
  • Patent number: 8938342
    Abstract: A vehicle includes torque sources, a transmission, and a controller programmed to execute a method. In executing the associated method, the controller determines whether continuous output torque is required through a torque exchange. When continuous output torque is required, the controller synchronizes and fills the oncoming clutch, estimates capacity of the oncoming clutch, and expands a short-term torque capacity of the oncoming clutch during the torque exchange, doing so in response to a control objective having a threshold priority. Onset of the torque exchange delays until the short-term torque capacity is sufficient for receiving all torque load from the offgoing clutch without affecting output torque.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: January 20, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Pinaki Gupta, Lawrence A. Kaminsky, Sean W. McGrogan
  • Patent number: 8918257
    Abstract: In a linear solenoid 107n, an electromagnetic coil 71n, a pressure sensor 72n, and label resistors 73n and 74n for correcting an inherent variation in a pressure detection characteristic are integrated; the standard characteristic of the pressure sensor 72n is stored in a control module 120M; when driving is started, the resistance values of the label resistors 73n and 74n are read, the pressure detection characteristic of the utilized pressure sensor 72n is corrected, and an excitation current for the electromagnetic coil 71n is controlled in such a way that a target adjusted hydraulic pressure is obtained. Even when due to a change in the oil temperature, the valve opening characteristic of the linear solenoid 107n changes, the adjusted hydraulic pressure is controlled to be constant.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: December 23, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shozo Kanzaki, Fumiaki Arimai, Hiroyoshi Nishizaki
  • Patent number: 8845491
    Abstract: An automated manual transmission includes a hydraulic device, a pilot valve, and a regulating valve. The pilot valve is operably connected to the hydraulic device and configured to actuate. The pilot valve includes at least one micro-electro-mechanical systems (MEMS) based device. The regulating valve is operably connected to the pilot valve and the hydraulic device. The regulating valve is configured to direct fluid to the hydraulic device based on the actuation of the pilot valve.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: September 30, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Dongxu Li, Farzad Samie, Chunhao J. Lee, Kumaraswamy V. Hebbale, Chi-Kuan Kao, Andrew L. Bartos, Kevin B. Rober, Bret M. Olson
  • Patent number: 8788159
    Abstract: A method for controlling pressure applied to a displaceable piston in a cylinder, piston displacement actuating a control element of an automatic transmission during a gearshift, includes determining whether piston displacement exceeds a free length of an isolation spring located between the piston and a friction plate of the control element; calculating the pressure using A the cross-sectional area of the piston; K a coefficient of a return spring extending between the piston and a reference position in the cylinder; x the piston displacement; F0 a pre-load of the return spring; xfree the free length of the isolation spring; and Kis a coefficient of the isolation spring; and applying the calculated pressure to the piston.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: July 22, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Gregory Michael Peitron, Sarah M. Thornton, Diana Yanakiev, James William Loch McCallum, Anuradha Annaswamy
  • Patent number: 8725371
    Abstract: A speed changing control apparatus for use in a vehicle includes: a driving power source configured to generate driving power for running; a transmission having a synchromesh mechanism configured to synchronize an input shaft revolution number with an output shaft revolution number and an actuator configured to automatically carry out a shift operation; and an automatic clutch disposed between the driving power source and the transmission. The speed changing control apparatus is configured to start a shift disengaging operation for the transmission after a speed change is requested and before the automatic clutch turns into a decoupled state, so as to suppress torsional vibration at the time of decoupling the automatic clutch. Such control enables the synchromesh mechanism to carry out revolution synchronization with the input shaft revolution number of the transmission in a lowered state, and diminishes a revolution difference subjected to synchronization.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: May 13, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masato Shimizu, Masato Tateno, Masayasu Mizobuchi
  • Patent number: 8696518
    Abstract: A method for controlling a transmission includes using signals of first solenoids to control first and second clutches, servos of first gears and servos of second gears, using signals of a second solenoid to establish a flow rate to cool the clutches and to actuate the servo that is associated with a selected gear, and using signals of a third solenoid to direct the flow rate to one of the clutches and to engage the selected gear.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: April 15, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Steven A. Frait, Steven G. Thomas
  • Patent number: 8690732
    Abstract: Various embodiments of methods, apparatus and systems that diagnose and/or detect faults of an electro-hydraulic control system for a transmission are presented. Some embodiments, adjust a main line pressure of the electro-hydraulic control system and detect faults based upon changes in a pressure switch resulting from such adjustments of the main line pressure. The pressure switch may be incorporated into a control main valve or a clutch trim valve of the electro-hydraulic control system.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: April 8, 2014
    Assignee: Allison Transmission, Inc.
    Inventor: Charles F. Long
  • Patent number: 8608620
    Abstract: A control method of an assist pump for automatic transmission of a vehicle is provided with an ISG system. The control method includes executing idle stop and go, detecting present transmission gear shift and operating an assist hydraulic pump at a predetermined standard RPM according to detected present transmission gear shift. The control method may reduce electric power consumption and enhance battery durability and fuel efficiency.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: December 17, 2013
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sejun Kim, Soon Ae Gwon, Jiyong Yu, Jung-hwan Bang
  • Patent number: 8538646
    Abstract: A control device for a vehicular automatic transmission is provided which can preferably execute backpressure control of accumulators and torque-up control so as to minimize the occurrence of interference between learning on these controls during a gearshift operation. With the control device for the vehicular automatic transmission including the accumulators (104, 106 and 108) operative to control a hydraulic pressure supplied to second and third clutches (C2 and C3) and a third brake (B3), the backpressure control is executed for controlling a backpressure of the accumulators (104, 106 and 108) during the gearshift operation while the torque-up control is executed for raising torque output from an engine (12). Completion of learning on the backpressure control is determined when no completion of learning on the backpressure control is determined, learning on the backpressure control is executed with no execution of the torque-up control.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: September 17, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuro Shibata, Hideaki Otsubo, Toshiya Oishi, Kiyoshi Kobayashi
  • Patent number: 8506454
    Abstract: A fluid pressure control device including a first pump actuated by power from a motor; a pressure regulator that regulates a discharge pressure from the first pump; a second pump actuated by electric power; a switcher opening a first path extending from the pressure regulator to a fluid pressure chamber of a friction engagement element, and blocking a second path extending from the second pump to the fluid pressure chamber of the friction engagement element, when the signal pressure is equal to or more than a set pressure, and the switcher blocking the first and opening the second paths when the signal pressure is less than the set pressure; and a control that controls the second pump and the fluid supply unit to supply the fluid regulated by the pressure regulator to a destination different from the fluid pressure chamber of the friction engagement element when the motor is stopped.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: August 13, 2013
    Assignee: Aisin AW Co., Ltd.
    Inventors: Tetsuya Shimizu, Tomoya Jinno, Masamichi Yamaguchi, Kenichi Tsuchida, Kazunori Ishikawa
  • Patent number: 8467947
    Abstract: A method for operating a hydraulic system of an automatic transmission, in particular in a hybrid drivetrain, in which the hydraulic system comprises a main pump that is powered by an internal combustion engine and/or an electric drive motor, an electric auxiliary pump and a system pressure valve for setting a system pressure, to ensure various operating functions. In addition to the main pump, the electric auxiliary pump also supplies the hydraulic system with a volume flow of an operating medium. The loading of the electric auxiliary pump is determined in an electronic control unit with regard to the value of the system pressure and the loading of the electric auxiliary pump is limited, by the electronic control unit, with regard to the selected operating function.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: June 18, 2013
    Assignee: ZF Friedrichshafen AG
    Inventors: Tobias Zollner, Bernd Allgaier, Christian Schwemer
  • Patent number: 8439804
    Abstract: A control for a multi-speed automatic vehicle transmission is provided. Electrical and hydraulic components are provided, including pressure control or “trim” valve systems in fluid communication with shift valves and electrohydraulic actuators to selectively engage and disengage the transmission clutches or other shift mechanisms. Pressure switches are provided for the trim valves and shift valves. The fluid connections between the trim valve systems and the shift valve systems are configured to reduce the total number of valves and fluid passages required and to reduce the size of at least one of the valves. Clutch blocking features are provided. Power off limp home and reduced engine load at stop features are provided in all forward ranges, and control of double transition shifts is also provided.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: May 14, 2013
    Assignee: Allison Transmission, Inc.
    Inventor: Bryan Hagelskamp
  • Patent number: 8392077
    Abstract: A linear solenoid is configured with an electromagnetic coil and a label resistor that are integrated with each other; the label resistor has a resistance value corresponding to a correction coefficient based on the difference between the actual characteristic of the supply current vs. adjusted hydraulic pressure output of the electromagnetic coil and a standard characteristic; and data for correcting a characteristic variation in the command current vs. output current characteristic of an electromagnetic coil is preliminarily stored in a control module by use of an adjustment tool. When the operation is started, the resistance value of the label resistor is read and an output current corresponding to a utilized linear solenoid is supplied, so that a target adjusted hydraulic pressure is obtained.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: March 5, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shozo Kanzaki, Fumiaki Arimai, Hiroyoshi Nishizaki
  • Patent number: 8382639
    Abstract: A hydraulic control system for a dual clutch transmission includes a plurality of solenoids and valves in fluid communication with a plurality of clutch actuators and with a plurality of synchronizer actuators. The clutch actuators are operable to actuate a plurality of torque transmitting devices and the synchronizer actuators are operable to actuate a plurality of synchronizer assemblies. Selective activation of combinations of the solenoids allows for a pressurized fluid to activate at least one of the clutch actuators and synchronizer actuators in order to shift the transmission into a desired gear ratio.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: February 26, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Robert L. Moses, Bret M. Olson, Philip C. Lundberg
  • Patent number: 8328689
    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: Grant
    Filed: July 20, 2009
    Date of Patent: December 11, 2012
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Byeong Wook Jeon
  • Patent number: 8306708
    Abstract: A control device for a vehicular automatic transmission which can realize a shifting with quickened response with suppressing a turbine blow-up during the shifting is provided. When a response in hydraulic pressure control by a hydraulic pressure control circuit 42 fails to satisfy a preset predetermined determining criterion, a shifting response is prevented from improving, in comparison to a case where the determining criterion is satisfied. Under a relatively low response of the hydraulic pressure control by the hydraulic pressure control circuit 42 due to air mixture to working oil, a control to inhibit a high-response shifting or the like is performed, so that a turbine blow-up caused by a delayed response of hydraulic pressure can be prevented. Thus, the control device for the vehicular automatic transmission can be provided, which can realize the shifting with quickened response, with suppressing the turbine blow-up during the shifting.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: November 6, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keisuke Ota, Hitoshi Matsunaga, Koji Oshima
  • Patent number: 8296034
    Abstract: To provide a vehicle speed limiting system that is capable of executing a maximum speed limiting control without influencing a driving feeling of a vehicle. A vehicle speed limiting system includes: a three-dimensional map 46a and a throttle valve driving unit 47. A first maximum speed limiter opening degree is calculated by adding a first predetermined opening degree, a second predetermined opening degree, and a current throttle valve opening degree, the first predetermined opening degree being calculated by multiplying a speed difference of the vehicle by a preset P-term coefficient, the second predetermined opening degree being calculated by multiplying an acceleration of the vehicle by a preset D-term coefficient. Once the calculated first maximum speed limiter opening degree falls below the target throttle valve opening degree ?B, the throttle valve motor 30 is driven on a basis of the first maximum speed limiter opening degree.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: October 23, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takashi Tetsuka, Kenichi Machida, Yukihiro Asada, Masanori Nakamura
  • Patent number: 8285463
    Abstract: A method and control system for operating a transmission includes a transmission control module determining a transmission sensor signal and a transmission pressure sensor offset prior to starting a vehicle engine and an engine start initiator starting the vehicle engine. The transmission control module controls a transmission function in response the transmission pressure sensor offset and the pressure sensor signal.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: October 9, 2012
    Inventors: Robert L. Moses, Ronald F. Lochocki, Jr.
  • Patent number: 8267836
    Abstract: A control system for an automatic transmission includes a downshift control section configured to increase an engaging capacity of an engaging-side engaging element to engage the engaging-side engaging element and decrease a first engaging capacity of a disengaging-side engaging element to disengage the disengaging-side engaging element when a parameter representing a progressing condition of the downshift reaches a value, thereby carrying out the downshift in a power-on condition. Additionally, the downshift control section is configured to decrease the engaging capacity of the disengaging-side engaging element to a second engaging capacity smaller than the first engaging capacity to continue the downshift which is currently progressing and to cause the engine control section to continue controlling the engine speed when a power-off condition is detected upon an accelerator pedal being returned to a position representing an operating amount during the downshift.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: September 18, 2012
    Assignee: JATCO Ltd
    Inventor: Masami Suzuki
  • Patent number: 8246514
    Abstract: A transmission device that is built into a power output device outputting power to a drive shaft in combination with a power source and that includes an automatic transmission that changes a shift speed by switching an engagement state of at least one friction engagement element and transmits power from the power source to the drive shaft, the transmission device includes an engagement pressure regulating device and a control unit.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: August 21, 2012
    Assignee: Aisin AW Co., Ltd.
    Inventor: Takafumi Hayashi
  • Patent number: 8221288
    Abstract: Various embodiments of methods, apparatus and systems that diagnose and/or detect faults of an electro-hydraulic control system for a transmission are presented. Some embodiments, adjust a main line pressure of the electro-hydraulic control system and detect faults based upon changes in a pressure switch resulting from such adjustments of the main line pressure. The pressure switch may be incorporated into a control main valve or a clutch trim valve of the electro-hydraulic control system.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: July 17, 2012
    Assignee: Allison Transmission, Inc.
    Inventor: Charles F. Long
  • Patent number: 8224537
    Abstract: A clutch temperature prediction module for a dual clutch transmission (DCT) includes at least one clutch slip power module that determines a first clutch slip power of a first clutch and a second clutch slip power of a second clutch. A temperature calculation module receives the first clutch slip power, the second clutch slip power, an ambient air temperature, an engine oil temperature, and a transmission oil temperature, and calculates at least one clutch plate temperature and a clutch housing temperature based on the first clutch slip power, the second clutch slip power, the ambient air temperature, the engine oil temperature, and the transmission oil temperature using a linear time-invariant (LTI) model.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: July 17, 2012
    Inventors: Markus Olsson, Ulf Gimbergsson
  • Patent number: 8216112
    Abstract: Systems and methods are provided for controlling a vehicle system including an engine that is selectively shut-down during engine idle-stop conditions, the system further including a hydraulic circuit comprising a hydraulically actuated transmission component, an accumulator, and an auxiliary transmission fluid pump. One example method comprises, during a first idle-stop engine shut-down condition, where the accumulator pressure is above a threshold, delivering pressurized transmission fluid to the hydraulic circuit from the accumulator, while disabling the auxiliary pump. The method further comprises, during a second idle-stop engine shut-down condition, where the accumulator pressure is below the threshold, operating the auxiliary pump and delivering at least some pressurized transmission fluid to the hydraulic circuit from the operating pump without travelling through the accumulator.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: July 10, 2012
    Assignee: Ford Global Technologies, LLC
    Inventors: Alex O'Connor Gibson, Gregory Michael Pietron, Seung-Hoon Lee, Yuji Fujii
  • 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: 8105204
    Abstract: A method and a device for controlling a fluid-actuated control system of an automatic or automated transmission of a motor vehicle, which has at least one pressure medium source, at least two control elements that are actuated by pressurized fluid and a control device for controlling the fluid-actuated control system. A further control module is used to reduce; the number and power consumption of valves that are actuated simultaneously to control the control elements; and the mechanical loading of the control elements (1, 2). The control module reads signals concerning at least one current control action and, in accordance with predetermined patterns, calculation rules and/or models, generates signals that cause non-switched control elements to be manipulated by pressurized working fluid.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: January 31, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Robert Ingenbleek, Markus Ulbricht, Mario Steinborn, Armin Brentel
  • Patent number: 8095284
    Abstract: An automatic transmission control unit determines whether or not a constantly open failure, in which a switch valve cannot switch a pressure regulating valve and a second hydraulic chamber to a non-communicative state, has occurred on the basis of a parameter (an inertia phase time, for example) representing a dynamic characteristic during a shift from a first gear position to a second gear position. The determination of the constantly open failure is begun after initial variation in the parameter representing the dynamic characteristic during the shift has been eliminated through learning control in which the dynamic characteristic during the shift is caused to approach a target dynamic characteristic.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: January 10, 2012
    Assignee: JATCO Ltd
    Inventors: Fumitaka Nagashima, Hajime Tasaka, Yoshihide Shinso
  • Patent number: 8088040
    Abstract: A process for actuating a transmission mechanism having hydraulic shifting elements for changing gear ratios by using electric actuators to adjust the actuating pressures of the shifting elements. Upon a request from an engine start/stop function for shutdown of an engine, the flow of electrical current to the actuators is changed from an operating level to a standby level depending upon the operating pressure of the shifting elements. Upon the request for startup of the engine, the flow or electrical current is changed from the standby level to the operating level. A system pressure in the hydraulic system is zero when the engine is shutdown, and the power consumption in the transmission mechanism is lower at the standby level than the operating level.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: January 3, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Peter Schiele, Klaus Steinhauser
  • 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: 8032288
    Abstract: An upshift control system and method of an automatic transmission. The system includes a vehicle speed detector outputting a vehicle speed signal; a transmission control unit for receiving the signal, calculating a target hydraulic pressure based on a change of the vehicle speed, and outputting a control signal corresponding to the target hydraulic pressure; and an actuator for controlling an actual hydraulic pressure of an on-coming element based on the control signal. The method includes determining whether a vehicle speed changes during an upshift; calculating the change of the vehicle speed; calculating a target hydraulic pressure based on the change of the vehicle speed; and controlling an actual hydraulic pressure of an on-coming element based on the target hydraulic pressure. The target hydraulic pressure may be calculated by adding a modified hydraulic pressure, proportional to the rate of change of the vehicle speed, to a constant reference hydraulic pressure.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: October 4, 2011
    Assignee: Hyundai Motor Company
    Inventor: Hoegab Kim