Electrical Control Patents (Class 475/123)
  • Patent number: 11047474
    Abstract: An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: June 29, 2021
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Eric Tryon, Charles F. Long, Bryan Hagelskamp
  • Patent number: 10767712
    Abstract: A system and method for determining filling parameters of a wet clutch system used with a transmission is provided. The method comprises the steps of collecting information about the torque output of the torque converter of the transmission during a filling process associated with the wet clutch system, analyzing the signal associated with the torque output of the torque converter within a time period of the filling process associated with the wet clutch system, and identifying when the signal associated with the torque output of the torque converter changes with respect to the time period of the filling process of the piston to determine a filling parameter associated with the wet clutch system. The system and method eliminates a need for recalibrating the transmission and accommodates production variances for components and assembly of systems using wet clutch systems.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: September 8, 2020
    Assignee: Dana Belgium N.V.
    Inventors: Mark M. A. Maessen, Keivan Shariatmadar, Mark R. J. Versteyhe
  • Patent number: 10690103
    Abstract: In some embodiments of the present disclosure, sensors mounted on a vehicle can allow opportunities for coasting to be predicted based on environmental conditions, route planning information, and/or vehicle-to-vehicle or vehicle-to-infrastructure signaling. In some embodiments of the present disclosure, these sensors can also predict a need for power and/or an end of a coast opportunity. These predictions can allow the vehicle to automatically enter a coasting state, and can predictively re-engage the engine and/or powertrain in order to make power available with no delay when desired by the operator.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: June 23, 2020
    Assignee: PACCAR INC
    Inventors: Uday Vadlamani, Carl Anders Hergart, Michael D. Gerty
  • Patent number: 10550928
    Abstract: A thermal management system includes a transmission, a heat exchanger, and a transmission control unit. The transmission includes: a transmission housing; a transmission pan housed within the transmission housing; transmission fluid contained within the transmission pan; and a transmission fluid conduit configured to circulate the transmission fluid between the transmission pan and within the transmission housing. The heat exchanger is disposed within the transmission housing and has a first surface positioned on the transmission pan and a second surface. The transmission control unit is disposed on and supported by the second surface of the heat exchanger such that the heat exchanger controls the temperature of the transmission control unit.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: February 4, 2020
    Assignee: Vitesco Technologies USA, LLC
    Inventors: James J Paris, James D Baer, Dan Finch
  • Patent number: 10520065
    Abstract: A planetary gear train of an automatic transmission for a vehicle includes input and output shafts, and first, second, third, fourth, and fifth planetary gear sets, each including three rotational elements. The gear train also includes nine shafts for selectively connecting the planetary gear sets, the input and output shafts, and a transmission housing in various configurations to achieve at least ten forward speeds and at least one reverse speed.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: December 31, 2019
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Jin Ho Kim, Jae Joon Lee, Jong Sool Park, Kyeong Hun Lee, Jong Soo Kim
  • Patent number: 10465777
    Abstract: A vehicle power transmission device includes a forward first clutch between an engine and an input shaft of a continuously variable transmission, and a second clutch between an output shaft of the continuously variable transmission and driving wheels. When the hydraulic fluid of the hydraulic pump is not supplied to the first disconnection device and the second disconnection device, a dragging torque generated in the second disconnection device is larger than a dragging torque generated in the first disconnection device.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: November 5, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryuji Chida, Hideaki Takahara
  • Patent number: 10161510
    Abstract: When there is a request for a skip downshift that transitionally establishes an intermediate speed position, a surge hydraulic pressure at the start of a torque phase during shift control toward the intermediate speed position is set so as to be lower than a surge hydraulic pressure at the start of a torque phase during shift control toward a required speed position.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: December 25, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Keisuke Ota, Norihiro Tsukamoto, Tomohiro Chimbe, Ayumu Sagawa, Hiromasa Takai, Masataka Hirano
  • Patent number: 10072753
    Abstract: A method for automatically controlling a shift stage may include a shift stage check operation of detecting a position of the shift stage of a vehicle, a driving and stopping sensing operation, of detecting driving state information of the vehicle to determine whether the vehicle is in a driving or a stopping condition, a learning preparing operation, of identifying whether the shift stage is shifted from a D stage to an N stage when it is determined that the shift stage enters the stopping condition at the D stage, a learning operation, of measuring a shifting time from when the shift stage enters the stopping condition at the D stage to when the shift stage is shifted to the N stage, and a learning execution operation, of automatically shifting the shift stage from the D stage to the N stage in the stored shifting time.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: September 11, 2018
    Assignee: Hyundai Motor Company
    Inventor: Han Gil Park
  • Patent number: 10036436
    Abstract: A method of learning a clutch touch point for a DCT vehicle, and he method is performed to learn a touch point of an apply-side clutch in a torque phase process during gear shifting. The method includes: controlling an amount of slip of a release-side clutch in an allowable range by a controller, when gear shifting is initiated; performing torque crossing control by releasing a release-side clutch torque to a certain level while applying a clutch torque to an apply-side clutch to the same level as the release-side clutch torque by the controller, after the controlling an amount of slip of a release-side clutch; and performing learning determination so as to learn a touch point of the apply-side clutch by the controller, when the amount of slip of the release-side clutch is beyond the allowable range in the performing torque crossing control.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: July 31, 2018
    Assignee: HYUNDAI MOTOR COMPANY
    Inventor: Sung Hyun Cho
  • Patent number: 9897201
    Abstract: A control for a multi-speed automatic vehicle transmission includes electrical and hydraulic components, such as pressure control valve systems in fluid communication with shift valves and electrohydraulic actuators. The control includes electrohydraulic features configured to enable the transmission to respond to an electrical failure whether the transmission is in neutral, a reverse range, or one of a plurality of forward ranges.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: February 20, 2018
    Assignee: Allison Transmission, Inc.
    Inventor: Bryan Hagelskamp
  • Patent number: 9822853
    Abstract: A planetary gear train of claim of an automatic transmission for a vehicle may include an input shaft, an output shaft, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, six control elements for selectively interconnecting rotation elements of the planetary gear sets and a transmission housing, a first connecting member directly connected to the transmission housing, a second connecting member selectively connected to the transmission housing, a third connecting member, a fourth connecting member selectively connected to the input shaft, a fifth connecting member directly connected to the input shaft, and selectively connected to the third connecting member, a sixth connecting member selectively connected to the transmission housing, a seventh connecting selectively connected the fifth connecting member, and selectively connected to the transmission housing, and an eighth connecting member directly connected to the output shaft.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: November 21, 2017
    Assignee: Hyundai Motor Company
    Inventors: Wonmin Cho, Jae Chang Kook, Hyun Sik Kwon, Seongwook Ji, Wookjin Jang, Seong Wook Hwang
  • Patent number: 9745722
    Abstract: A power transmission includes first and second clutches for switching a transmission path for a driving force. A work vehicle includes a clutch controlling unit and an engine controlling unit. The clutch controlling unit is configured to determine which of first and second modes the transmission path is switched into based on which of a range of greater than or equal to a mode switching threshold and a range of less than or equal to the mode switching threshold a speed ratio parameter falls into, and is configured to output a clutch command signal causing one of the first and second clutches to be engaged corresponding to the determined mode. The engine controlling unit is configured to apply an offset to a rotational speed of an input shaft such that after switching into the determined mode, the speed ratio parameter deviates from the mode switching threshold in the switched mode.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: August 29, 2017
    Assignee: KOMATSU LTD.
    Inventors: Hiroshi Monden, Tatsuro Nohara, Shogo Miyazaki
  • Patent number: 9702454
    Abstract: A fluid powered circuit for a gearbox and a method for protecting a gearbox are disclosed. The fluid powered circuit includes a control circuit operatively connected to a clutch engagement circuit. The fluid powered circuit is selectively operable to either flow a fluid from a fluid supply source to the clutch or vent the fluid to the atmosphere. The method for protecting the gearbox includes flowing the fluid from the fluid supply source to the fluid powered circuit, measuring the speed of the shaft, measuring the pressure of the fluid entering the clutch engagement circuit, and flowing the fluid from the fluid powered circuit to the clutch upon detecting one or more conditions.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: July 11, 2017
    Assignee: Penny Technologies S.À.R.L.
    Inventors: Benjamin Lyle Raguse, Daniel Brooks Schmidt, Ronald Mark Sherwood
  • Patent number: 9689434
    Abstract: A hydraulic controller for an automatic transmission of a motor vehicle includes at least one gear shift piston-cylinder unit having a gear shift piston for actuating a shifting element in the form of a multi-plate clutch, and a gear shift pressure chamber in which an actuating pressure may be built up by supplying operating fluid. The gear shift piston-cylinder unit has a centrifugal oil chamber that is separated from the gear shift pressure chamber by a gear shift piston. Operating fluid may be supplied to the centrifugal oil chamber via a centrifugal oil line supplied by a first supply line. The hydraulic controller has a second supply line for supplying operating fluid to the centrifugal oil line. The second supply line may be closed and opened by a centrifugal oil valve.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: June 27, 2017
    Assignee: Daimler AG
    Inventors: Michael Baraga, Markus Brandenburg, Henrik Kalczynski, Thomas Kull
  • Patent number: 9334628
    Abstract: A motor grader is provided with an engine, front and rear travel wheels, a transmission, a work implement, a control unit, and a vehicle speed adjusting knob. The transmission has hydraulic clutches for switching between forward and reverse travel and for switching between speed stages. The transmission changes the speed of power from the engine, and transmits the power to either the front travel wheels and/or to the rear travel wheels. The work implement includes a blade for grading. During travel at a forward first speed, the control unit causes one of the hydraulic clutches of the transmission to operate as a braking clutch such that the motor grader travels at a very low speed. The vehicle speed adjusting knob is a member for setting the vehicle speed during very low-speed travel to an arbitrary speed.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 10, 2016
    Assignee: KOMATSU LTD.
    Inventors: Tomonao Nagamura, Tetsuya Morimoto, Michihiro Aida
  • Patent number: 9168910
    Abstract: A control apparatus controls a vehicle provided with an internal combustion engine, an oil pump actuated by the engine for pressurizing operation oil, and a belt-type continuously variable transmission to which the pressurized operation oil is supplied. An automatic stop of the engine is performed when a predetermined condition is satisfied. A transmission ratio of the continuously variable transmission is detected, and a continuable time period of the automatic stop of the engine is set according to the detected transmission ratio upon automatically stopping the engine. The automatic stop is controlled to end when a continuation time period of the automatic stop of the engine expires. Good vehicle start performance can be obtained when restarting the engine after the automatic stop, regardless of the brake operation manner and the like upon stopping the vehicle.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: October 27, 2015
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Takayuki Onodera, Kohei Sakai
  • Patent number: 9162680
    Abstract: A method of controlling a transmission and engine during a coasting downshift is particularly suited to transmission arrangements exhibiting strong inertia coupling. During the inertia phase of the downshift, a third clutch such as a torque converter bypass clutch is modulated to control output torque. Simultaneously, engine torque is modulated to control engine speed. The resulting control scheme is only semi-coupled.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: October 20, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Hongtei Eric Tseng, Christopher John Teslak, Bradley Dean Riedle, Jeffrey Allen Doering, Tobias John Pallett
  • Patent number: 9009941
    Abstract: It is intended to make it possible to, even in a situation where a program and/or data to be written to a memory device of an electronic control unit provided in an automatic transmission become different in content, depending on a specification of a vehicle to be mounted with the automatic transmission, manage the electronic control unit while distinguishing only by a difference in hardware configurations thereof.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: April 21, 2015
    Assignee: Mazda Motor Corporation
    Inventors: Akihiro Mitani, Keiichiro Sueshige, Tsuyoshi Kiyooka
  • Patent number: 9001516
    Abstract: Provided is an electronic circuit unit to be mounted within a casing of an automatic transmission for a vehicle. An electronic circuit body including circuit-side terminals protruding in an outward direction from a main-body, connectors to be connected to the electronic circuit body, a cover, and a base member having a placing face on which the cover, the electronic circuit body and the connectors are placed. The cover is provided with a main-body covering part, fitting-portion covering parts and which cover a fitting-portion of the circuit-side terminals and fitting parts of the wire-side terminals from a side opposing to the placing face, and a restricting part for regulating the detachment of the connectors from the fitting position to the detached position.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: April 7, 2015
    Assignees: Autonetworks Technologies Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Osamu Nakayama, Kouichi Matsumoto
  • Patent number: 8747270
    Abstract: A vehicle includes an engine, torque converter assembly, and transmission. The torque converter assembly includes a torque converter clutch (TCC). The transmission is connected to the engine via the torque converter assembly, and includes rotating and braking clutches, a pump, and a valve body assembly (VBA). The VBA includes Micro Electro Mechanical Systems (MEMS) pressure sensors and high-flow, hybrid MEMS flow control valves. Each MEMS pressure sensor and each MEMS control valve is in fluid communication with a corresponding one of the TCC, the rotating, and the braking clutches. The VBA includes first and second low-flow, fully MEMS valves which control line pressure to the VBA and fluid pressure to the TCC, respectively. The VBA delivers fluid pressure to the clutches, alone or in different combinations, to establish at least six different forward drive states of the transmission.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: June 10, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Farzad Samie, Andrew L. Bartos, Dongxu Li, Chunhao J. Lee, Kumaraswamy V. Hebbale, Xingyong Song
  • Patent number: 8688336
    Abstract: A system for controlling power downshifts of a transmission includes a flare generation module, a flare control module, and a shift control module. The flare generation module generates turbine speed flare by decreasing pressure applied to an off-going clutch of the transmission. The flare control module decreases the turbine speed flare by increasing the pressure applied to the off-going clutch of the transmission. The shift control module increases a pressure applied to an on-coming clutch of the transmission when the turbine speed flare is less than a predetermined amount from a desired turbine speed flare.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: April 1, 2014
    Inventor: Todd J. Thor
  • Patent number: 8591364
    Abstract: A transmission system is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members a plurality of torque transmitting devices, a launch clutch, and a hydraulic circuit. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: November 26, 2013
    Assignee: GM Global Technology Operations LLC
    Inventor: James M. Hart
  • Patent number: 8543299
    Abstract: An exemplary control device includes an input torque detection unit that detects an input torque input to the input shaft; and a controller that: determines torque distribution of two of the friction engagement elements that form the shift speeds; and calculates a transmission torque of the two friction engagement elements based on the input torque and the torque distribution and sets the engagement pressure to obtain a torque capacity that can transmit the transmission torque, wherein the controller sets the engagement pressure such that slippage does not occur in the two friction engagement elements in a state where engagement of the two friction engagement elements forms the shift speeds and such that, even if an additional friction engagement element engages based on the line pressure while the two friction engagement elements are engaged, one of the three friction engagement elements is caused to slip.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: September 24, 2013
    Assignee: Aisin AW Co., Ltd.
    Inventors: Tetsuya Shimizu, Masamichi Yamaguchi, Satoshi Nishio, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Shin-ichirou Murakami
  • Patent number: 8417411
    Abstract: A control system may include a polarity determination module, a torque variation module, and a torque sensor diagnostic module. The polarity determination module determines a first polarity of a torque signal that indicates a transmission torque. The torque sensor diagnostic module diagnoses an error of a torque sensor when an detected polarity of the torque signal is opposite from the first polarity. A control system may include a torque variation module and a torque sensor diagnostic module. The torque variation module determines a maximum torque variation during a predetermined diagnostic period based on the torque signal. The torque sensor diagnostic module diagnoses an error of a torque sensor when the maximum torque variation is outside of a torque variation range. The torque variation range is defined by a minimum torque variation threshold and a maximum torque variation threshold.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: April 9, 2013
    Inventor: Randall B. Dlugoss
  • Patent number: 8403791
    Abstract: A manual valve control for a multi-speed vehicle transmission is provided. Electronic and hydraulic components are provided, including trim valve systems that are multiplexed by a shift valve and a manual valve. The trim valves and shift valve are self-diagnosing via a plurality of multiplexed pressure switches. The control enables single and double range shifts among the multiple forward speed ratios, including shifts to and from sixth and higher forward ratios, reverse and neutral. The control also includes a reduced engine load at stop feature. In addition, a power off/limp home feature provides a plurality of failure modes, including a failure mode for sixth and higher forward speed ratios.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: March 26, 2013
    Assignee: Allison Transmission, Inc.
    Inventors: Charles F. Long, Charles T. Taylor
  • Patent number: 8301347
    Abstract: A method for managing torque transmitting mechanism actuator output pressure under low supply pressure conditions is provided. The method is executable to control engagement of a torque transmitting mechanism during such conditions.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: October 30, 2012
    Assignee: Allison Transmission, Inc.
    Inventors: Jeff Shultz, Peter Swingler
  • Patent number: 8290670
    Abstract: A clutch control device includes: a plurality of hydraulic clutches built into a transmission; a clutch switching pattern storage device in which a plurality of clutch switching patterns, each defining engage/release changeover timing with which the plurality of hydraulic clutches are engaged/released are stored in correspondence to individual speed change patterns adopted by the transmission; a clutch switching pattern selection device that selects a clutch switching pattern stored in the clutch switching pattern storage device in correspondence to a speed change pattern for the transmission at a time of speed change; and a hydraulic control device that executes hydraulic control for the plurality of hydraulic clutches in correspondence to the clutch switching pattern selected by the clutch switching pattern selection device.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: October 16, 2012
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tetsuji Tanaka, Masami Higaki, Hideo Nakayama, Eiichi Sakai, Hidenobu Tsukada
  • Patent number: 8255128
    Abstract: An exemplary control device includes an input torque detection unit that detects an input torque input to the input shaft; and a controller that: determines torque distribution of two of the friction engagement elements that form the shift speeds; and calculates a transmission torque of the two friction engagement elements based on the input torque and the torque distribution and sets the engagement pressure to obtain a torque capacity that can transmit the transmission torque, wherein the controller sets the engagement pressure such that slippage does not occur in the two friction engagement elements in a state where engagement of the two friction engagement elements forms the shift speeds and such that, even if an additional friction engagement element engages based on the line pressure while the two friction engagement elements are engaged, one of the three friction engagement elements is caused to slip.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: August 28, 2012
    Assignee: Aisin AW Co., Ltd.
    Inventors: Tetsuya Shimizu, Masamichi Yamaguchi, Satoshi Nishio, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Shin-ichirou Murakami
  • Patent number: 8235855
    Abstract: A hydraulic control apparatus for an automatic transmission includes linear solenoid valves each configured to control a line pressure in accordance with an electromagnetic force of a solenoid. The linear solenoid valves each include a spool and are controlled under a normal hydraulic control mode or a current consumption decrease mode. The spool is actuated in accordance with the electromagnetic force. An output fluid pressure is controlled to be a maximum output fluid pressure from a minimum output fluid pressure with the spool at a balanced position under the normal hydraulic control mode. A current consumption for generating the electromagnetic force is decreased to make the fluid pressure equal to or lower than the minimum output fluid pressure under the normal hydraulic control mode and to hold the fluid pressure within a range corresponding to the balanced position under the current consumption decrease mode.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: August 7, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Teruyuki Deishi, Shunji Kamo, Shinya Abe
  • Patent number: 8100803
    Abstract: An electrically variable transmission (EVT) selectively establishes various EVT modes and a neutral mode. The EVT includes a source of pressurized fluid, fluid-actuated clutches, various solenoid-actuated valves including trim valves and blocking valves adapted to control a flow of pressurized fluid to the clutches to establish the transmission operating modes, and an electronic control unit (ECU). The ECU actuates different combinations of the solenoid-actuated valves to establish the different transmission modes. The solenoid-actuated valves are configured in such a manner as to provide the EVT with one or more default operating modes in the event the ECU temporarily loses electrical power. Depending on the particular configuration, the default modes can be the neutral mode alone, or the neutral mode combined with one or more of the EVT modes, with the EVT modes enabled by providing one or both of the blocking valves with a latching feature.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: January 24, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael D. Foster, Jy-Jen F. Sah, Peter E. Wu
  • Patent number: 8052563
    Abstract: An electro-hydraulic control system is provided for a transmission with a torque-transmitting mechanism that has a dual area piston. When pressurized fluid is provided to a first of the two piston areas, the position of a spring-biased shift valve controls whether pressurized fluid communicates with the second piston area. A solenoid valve in fluid communication with the shift valve is energizable to direct pressurized fluid to the shift valve to urge the shift valve to the unstroked position to which the spring also urges. The shift valve may also be urged by pressurized fluid to the stroked position, but only when the solenoid valve is not energized. The spring maintains the shift valve in the unstroked position when pressurized fluid is directed to the shift valve to act both against and with the spring.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: November 8, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Jason L. Ellis, Darren J. Weber, Charles F. Long
  • Patent number: 8046144
    Abstract: The present disclosure utilizes Non-linear Proportional and Derivative (NLPD) control on a duty cycle of an applying clutch for stationary and rolling vehicle garage shifts. The applying clutch can be engaged by as electrically activated solenoid valve, and the present disclosure utilizes NLPD control to adjust the duty cycle of the solenoid to provide a smooth vehicle garage shift engagement. The present disclosure utilizes a control algorithm based on turbine speed, turbine acceleration, and output speed. The present disclosure can utilize an existing vehicle control unit, such as an engine control unit (ECU), transmission control unit (TCU), or the like, to receive turbine speed measurements, to calculate the solenoid duty cycle using NLPD control on the turbine speed acceleration error, and to adjust the solenoid driver on the solenoid valve.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: October 25, 2011
    Assignee: Chrysler Group LLC
    Inventors: Gary Lowe, Libo Fan
  • Patent number: 7985153
    Abstract: A hydraulic control system of an eight-speed automatic transmission includes a first clutch/second clutch control portion controlled by a first proportional control solenoid valve and selectively supplying hydraulic pressure of a first pressure control valve to the first clutch or the second clutch; a third clutch control portion controlled by a second proportional control solenoid valve and supplying hydraulic pressure of a second pressure control valve to the third clutch; a fourth clutch/first brake control portion controlled by a third proportional control solenoid valve and selectively supplying hydraulic pressure of a third pressure control valve to the fourth clutch or the first brake, the fourth clutch/first brake control portion supplying reverse range pressure to the first brake at the reverse speed; and a second brake control portion controlled by a fourth proportional control solenoid valve and directly supplying hydraulic pressure of a fourth pressure control valve to the second brake.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: July 26, 2011
    Assignee: Hyundai Motor Company
    Inventors: Hyun Goo Kang, Jin Soo Lee
  • Patent number: 7946943
    Abstract: The invention relates to a method and a device for controlling an automatic transmission, the automatic transmission (100) comprising a single-stage planetary gear train (110) in combination with a two-stage planetary gear train (120), and provision being made for a brake band (B1) assigned to the large sun gear of the two-stage planetary gear train (110) and a brake coupling (B2) assigned to the planet carrier of the two-stage planetary gear train (120). In order to reduce idling vibrations, the brake band (B1) and the brake coupling (B2) are actuated simultaneously for at least some of the time during an operating state in which the internal combustion engine is idling.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: May 24, 2011
    Assignee: Ford Global Technologies, LLC
    Inventor: Martin Bastiaan Taal
  • Patent number: 7925407
    Abstract: The adjustment method includes an estimation step in which valve characteristics of the linear solenoid valves fitted to the hydraulic control circuit are measured, and estimated linear valve characteristics of the linear solenoid valves in isolation state are estimated based on the measured valve characteristics using predetermined correlations; and a correction value output step in which estimated linear piston-end pressures of the hydraulically-driven friction engagement elements immediately before the hydraulically-driven friction engagement elements are engaged are calculated based on the estimated linear valve characteristics, and the correction values that are applied to the control command values to adjust the drive currents supplied from the valve control unit to the linear solenoid valves are calculated based on differences between the estimated linear piston-end pressures and nominal piston-end pressures, and then output.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: April 12, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masami Kondo, Masaharu Tanaka, Takayuki Kawakami, Naoto Moriya
  • Patent number: 7896769
    Abstract: A manual valve control for a multi-speed vehicle transmission is provided. Electronic and hydraulic components are provided, including trim valve systems that are multiplexed by a shift valve and a manual valve. The trim valves and shift valve are self-diagnosing via a plurality of multiplexed pressure switches. The control enables single and double range shifts among the multiple forward speed ratios, including shifts to and from sixth and higher forward ratios, reverse and neutral. The control also includes a reduced engine load at stop feature. In addition, a power off/limp home feature provides a plurality of failure modes, including a failure mode for sixth and higher forward speed ratios.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: March 1, 2011
    Assignee: Allison Transmission, Inc.
    Inventors: Charles F. Long, Charles T. Taylor
  • Patent number: 7894965
    Abstract: A transmission for a vehicle includes a first gear set and a second gear set. A first plurality of elements are operable in an applied state and a released state and a second plurality of elements are operable in an applied state and a released state. A controller toggles the first and second plurality of elements between the applied state and the released state to achieve a desired gear ratio. The controller times entry of at least one of the first and second plurality of elements into the released state with entry of at least another of the first and second plurality of elements into the applied state by controlling a hold pressure applied to the at least one element entering the released state. The controller determines the hold pressure by referencing current operating conditions of the transmission in a lookup table stored in a memory of the controller.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: February 22, 2011
    Assignee: Chrysler Group LLC
    Inventors: Hussein A. Dourra, Ali M. Mourtada, David L. Kwapis
  • Patent number: 7886416
    Abstract: A replacement accumulator plate for use in CHRYSLER 45RFE and CHRYSLER 5-45RFE transmission valve bodies is redesigned to increase the service longevity of the original equipment manufacture accumulator assemblies disposed in the valve body including the low/reverse clutch accumulator, the 2nd clutch accumulator, the 4th clutch accumulator, the underdrive clutch accumulator, and the overdrive clutch accumulator. The present replacement accumulator plate includes a plurality of stress reduction zones, which are integrated into the replacement accumulator plate to reduce flexion imparted to the plate in operation.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: February 15, 2011
    Assignee: Sonnax Industries, Inc.
    Inventor: Brandon W. Greene
  • Patent number: 7824291
    Abstract: When a determination for a second shift is made during a first shift process, if the turbine speed is the variety of the synchronous rotational speed for the speed to which the automatic transmission is to be shifted in the second shift and the hydraulic pressure command value for the first brake, which is engaged in the second shift, is equal to or larger than a predetermined value, the multiple shift portion immediately switches the shift control from the first shift control to the second shift control so that the hydraulic pressure command value for the first brake, which is engaged in the second shift, increase at a specific rate and the hydraulic pressure command value for the third brake, which is released in the second shift, decreases at a specific rate.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: November 2, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takaaki Tokura, Toshio Sugimura, Tomohiro Asami, Nobufusa Kobayashi, Yoshio Hasegawa
  • Patent number: 7789785
    Abstract: A shift control method of an automatic transmission according to this invention controls a shift from an N speed achieved by engagement of first and second frictional elements to an N?3 speed achieved by engagement of third and fourth frictional elements, wherein release of the second frictional element begins after release of the first frictional element begins and engagement of the fourth frictional element begins after engagement of the third frictional element begins, and wherein the engagement of the third frictional element is completed substantially at the same time that the release of the second frictional element is completed.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: September 7, 2010
    Assignee: Hyundai Motor Company
    Inventor: Byeong Wook Jeon
  • Patent number: 7682276
    Abstract: A hydraulic control system that includes a solenoid valve for supplying a prescribed fluid pressure; and a relay valve for selectively switching a destination of the prescribed fluid pressure between a first destination part and a second destination part. The relay valve has an input port supplied with a normally produced fluid pressure and an output port that selectively communicates with the input port. The hydraulic control system further includes a fluid pressure switch, provided in the output port of the relay valve, that is activated when the input port communicates with the output port to allow the normally produced fluid pressure to be supplied to the output port.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: March 23, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazutoshi Nozaki, Hirofumi Ota, Atsushi Honda
  • Patent number: 7651427
    Abstract: An electro-hydraulic control system is provided with a diagnostic system that uses extensive multiplexing of pressure switches to reduce the number of required components. The control system includes a controller with a pressure switch diagnostic system having first, second, third and fourth pressure switches each having a high and a low logic state, first and second logic valves each movable between a respective first position and second position, and first, second, third and fourth trim valves each movable between a respective first position and second position. The pressure switches are multiplexed to report one of the high and low logic state to the controller in accordance with a relatively high and low fluid pressure, respectively, at different ones of the trim valves and logic valves, thereby enabling a determination of a change in or failure to change position of the respective the trim valves or logic valves.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: January 26, 2010
    Assignee: GM Global Trechnology Operations, Inc.
    Inventors: Charles F. Long, Bryan H. Hagelskamp
  • Patent number: 7628729
    Abstract: A hydraulic control apparatus, provided with a manual shift valve that outputs a forward range pressure and a reverse range pressure, and a linear solenoid valve that outputs an engagement pressure to the hydraulic servo that engages during reverse travel when energized, includes a fourth clutch relay valve that is interposed between the linear solenoid valve and the hydraulic servo. The fourth clutch relay valve communicates an engagement pressure of the linear solenoid valve to the hydraulic servo by locking in the normal position when a signal pressure of the solenoid valve is input, and communicates a reverse range pressure to the hydraulic servo by being switched to a fail position by the reverse range pressure during a failure in which the fourth clutch relay valve is de-energized. Thereby, it is possible to establish a reverse speed during a failure in which the solenoid valve is de-energized.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: December 8, 2009
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Nobuhiro Sato, Tetsuya Yamaguchi, Kazuyuki Noda, Akira Fukatsu, Mikio Iwase, Kazutoshi Nozaki, Atsushi Honda
  • Patent number: 7621836
    Abstract: A hydraulic control system applicable to a power train of a seven-speed automatic transmission for a vehicle having six friction members. Enhanced overall performance is achieved by minimization of shift shock and an enhancement of fuel consumption as a consequence of achieving precise and effective control.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: November 24, 2009
    Assignee: Hyundai Motor Company
    Inventor: Ki Been Lim
  • Publication number: 20090280945
    Abstract: A transmission apparatus is disclosed for transmitting power from a motor for driving an airport ground support tractor. The transmission apparatus includes a housing which has an input end and an output end, the housing defining a transmission enclosure. A torque converter is disposed within the housing, the torque converter having an input driven by the motor and an output for transmitting torque from the motor. An input shaft is rotatably supported within the housing, the input shaft having a first and a second extremity. The first extremity of the input shaft is driven by the output from the torque converter. A planetary gear train intermeshes with the input shaft, the gear train being disposed between the first and second extremities of the input shaft. A planetary gear train support is provided for rotatably supporting the planetary gear train.
    Type: Application
    Filed: May 7, 2008
    Publication date: November 12, 2009
    Inventors: Robert L. Brandemuehl, Jack L. Peckham
  • Patent number: 7556579
    Abstract: A transmission shift system includes a first control path having a first electrically actuated valve system, and is configured to selectively direct hydraulic pressure to a first plurality of clutches for selecting only an output speed. A second control path independent of the first control path includes a second electrically actuated valve system, and is configured to selectively direct hydraulic pressure to a second plurality of clutches for selecting only an output direction. A shifter has a plurality of switches, each switch being in direct electrical connection with a corresponding of the first electrically actuated valve system and the second electrically actuated valve system for operating the first control path and the second control path controllerlessly, wherein the plurality of switches are operated manually using the shifter.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: July 7, 2009
    Assignee: Deere & Company
    Inventors: Jeffrey David Miller, Steve Gary Fleischmann, Timothy Bernard French
  • Publication number: 20090111636
    Abstract: An electrohydraulic control device (1) of an 8-speed transmission having several electrically controllable pressure control valves (6-12) for hydraulically actuating five switching elements (A-E) and an electric gear control unit via which different operating states of the transmission may be adjusted. Three of the switching elements are connected in the force flow of the transmission for representing a gear ratio (“1” to “R”) of the transmission. When the gear control unit is de-activated and the power supply to the solenoid valve and pressure control valves is interrupted, and when the transmission is in the operating state, in which a gear ratio (“1”; “2”; “3”; “4”; “5”; “6”; “7”; “8”; “R”) is engaged, a predefined emergency transmission (“6”; “R”) is represented by three simultaneously hydraulically connected switching elements (C, D, E, A, B, D).
    Type: Application
    Filed: October 24, 2008
    Publication date: April 30, 2009
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Georg GIERER, Thilo SCHMIDT
  • Publication number: 20090088281
    Abstract: An automatic transmission is provided. One embodiment of the automatic transmission may include a valve body including control valves for hydraulically controlling a friction engaging element provided within said transmission. The automatic transmission may further include an electric control unit located on said valve body for controlling gear shifting of said automatic transmission. The automatic transmission may further include a transmission case having a peripheral wall for at least partially enclosing a gear shift mechanism and an outer wall provided adjacent to said peripheral wall, wherein said electric control unit is located within a containing space surrounded by said peripheral wall, said outer wall and said valve body.
    Type: Application
    Filed: August 27, 2008
    Publication date: April 2, 2009
    Applicant: Mazda Motor Corporation
    Inventors: Tatsutoshi Mizobe, Junichi Doi, Shinya Kamada, Keiichiro Sueshige, Akihiro Mitani
  • Patent number: 7510496
    Abstract: An electro-hydraulic control system for a transmission is provided having first, second, and third selectively engageable torque transmitting mechanisms. The control system includes a main source of fluid pressure and first, second, and third trim valves operable to effect the engagement of respective first, second, and third torque transmitting mechanisms. A latch valve is in fluid communication with the first torque transmitting mechanism and an interlock valve is in selective fluid communication with the latch valve. The first trim valve, latch valve, and interlock valve are in fluid communication with the main source of fluid pressure. The first trim valve operates selectively communicate fluid pressure to the latch valve to effect engagement of the first torque transmitting mechanism, while the interlock valve is operable to selectively communicate fluid pressure to one of the second and third trim valve to effect engagement of the respective second and third torque transmitting mechanisms.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: March 31, 2009
    Assignee: General Motors Corporation
    Inventors: Charles F. Long, Clifford H. Oehme
  • Patent number: 7500932
    Abstract: A shift control apparatus includes an automatic transmission provided with a first friction-engagement element and a second friction-engagement element; and a friction-engagement element control section configured to control the first and second friction-engagement elements. The friction-engagement element control section includes a target-value setting section configured to set a first target differential speed; a first control section configured to bring a rotational speed difference of the first friction-engagement element gradually close to the first target differential speed; and a second control section. The second control section includes a torque-capacity calculating section configured to calculate a total transfer-torque capacity, and a distribution ratio setting section configured to set a distribution ratio between transfer-torque capacities of the first and second friction-engagement elements.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: March 10, 2009
    Assignee: Jatco Ltd
    Inventors: Shusaku Katakura, Masaaki Uchida, Yoshinobu Kawamoto, Tomoaki Honma