Control Mechanism Patents (Class 74/335)
  • Patent number: 7694602
    Abstract: An automatic transmission apparatus (1) for a vehicle includes: a shift lever (11) for changing the range of an automatic transmission (50); a position gate (13) which restricts the position of the shift lever (11) and which releases the restriction to allow the position of the shift lever (11) to be changed when an operation button (14) provided on the shift lever (11) is pressed; a torque sensor (30) which detects an operation force of the shift lever (11); and a motor (M) for power-assisting the operation of the shift lever (11) based on a detected value of the torque sensor (30), wherein, when the shift lever (11) is operated and brought into contact with the position gate (13), and the detected value of the torque sensor (30) is reversed to any one of a positive value and a negative value, a driving force of the motor (M) is limited to prevent the shift lever (11) from being power-assisted in a reversed direction.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: April 13, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masaharu Nagano, Yuzou Shimamura, Yukitsugu Hirota, Hitoshi Kidokoro
  • Patent number: 7685900
    Abstract: A vehicle mounted with a continuous stepless transmission having a continuous stepless transmission and a controlling section for performing speed-changing operation of the continuous stepless transmission, the speed change ratio of the continuous stepless transmission being switchable by a speed change operation section, includes: a shift-mode-switching section which switches the mode of a speed change ratio switching, the speed change ratio switching being performed by the speed change operation section, between a first mode for switching the speed change ratio in stages among a plurality of preset speed change ratios and a second mode for switching the speed change ratio continuously or substantially continuously; in which the controlling section further includes a vehicle speed setting section which sets a target vehicle speed at least based on the speed change operation signal detected by operating the speed change operation section and a mode signal detected by switching the shift-mode-switching section
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: March 30, 2010
    Assignee: Komatsu Ltd.
    Inventors: Toshihiko Fukasawa, Eiji Ishibashi, Ikuzo Mochida, Hidehiro Hashimoto, Masato Oura
  • Publication number: 20100064831
    Abstract: Disclosed are systems, assemblies, and components that relate to power transfer. In particular, the disclosed systems includes a transmission that offers variable speeds and changes between different gear ratios while maintaining constant engagement. Constant engagement may be maintained by tooth-to-tooth contact to be scalable for a variety of applications. An example system includes a phase shifting mechanism. The phase shifting mechanism may include an eccentric gear that provides an oscillating output. The oscillating output creates an overall gear ratio change that slides between gear ratios, thereby allowing changes to occur in small, and possibly infinitely small increments. According to one example, an eccentric gear has a changing base radius and includes a tooth with a hybrid profile that has a base the width of an initial profile, and a width at a top of the tooth that is that of a final profile.
    Type: Application
    Filed: September 14, 2009
    Publication date: March 18, 2010
    Inventors: Gary D. Lee, William M. Decker, Brandon Levi Haupt, Isaac Reo Jones, Robert H. Todd, Carl D. Sorensen, Kenneth W. Chase
  • Patent number: 7673727
    Abstract: In a clutch engaging and disengaging operation at the time of a shift change, a state in which the clutch position of the clutch is at a specific value between a first clutch position at which a half clutch state finishes and a second clutch position at which the clutch is in a mechanical maximum disengaged state is maintained until completion of a gear change is detected by a gear position sensor. Therefore, even if a dog abutment state occurs between first gears with engaging projections and second gears with engaging recesses, the dog abutment can be resolved properly.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: March 9, 2010
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Tooru Zenno
  • Patent number: 7658123
    Abstract: A shift range switching apparatus includes an automatic transmission that includes a shift range switching device having a control rod for switching an actual shift range corresponding to rotation angle of the control rod. The shift range switching apparatus further includes an electric actuator that includes an output shaft connecting with the control rod. The electric actuator switches the actual shift range by rotating the control rod via the output shaft. The shift range switching apparatus further includes an assembly regulating device that allows the electric actuator to be detachable from and attachable to the automatic transmission when the actual shift range of the shift range switching device is set at a specific shift range.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: February 9, 2010
    Assignees: DENSO Corporation, Nippon Soken, Inc.
    Inventors: Masashi Hori, Kiyoshi Kimura, Shigeru Yoshiyama, Taku Itoh
  • Patent number: 7650807
    Abstract: A method for adjusting an automatic transmission ratio by a driver includes imposing a ratio change required by the driver to the transmission when first conditions are fulfilled, maintaining the ratio until second conditions for returning to operation in an automatic mode are fulfilled, and automatically restoring the automatic mode when the second conditions are fulfilled.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: January 26, 2010
    Assignee: Renault S.A.S.
    Inventors: Carine Poisson, Christian Taffin
  • Patent number: 7644638
    Abstract: An automatic transmission has a clutch mechanism, an oil pump, and a valve body that encloses a clutch hydraulic pressure control mechanism. The valve body is arranged axially adjacent to the clutch mechanism. The oil pump is offset from an input shaft of the transmission and arranged so as to overlap the valve body and/or the clutch mechanism when viewed from a direction perpendicular to the axial direction of the automatic transmission. This automatic transmission improves the control response of the clutch of the transmission while avoiding an increase in the size of the transmission.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: January 12, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Kazuhiro Taniai
  • Patent number: 7640819
    Abstract: An internal combustion engine including a transmission for transmitting power from a crankshaft to an output shaft through speed change, with the speed change in the transmission being performed by the driving of a speed change electric motor through a speed change drive mechanism, wherein power transmission control means for controlling the transmission of power from the crankshaft to the transmission is provided at one end of the crankshaft, and at least a part of the speed change electric motor and the speed change drive mechanism is disposed on the outside of the power transmission control means. This configuration of the internal combustion engine is reduced in size because of the layout of the speed change drive mechanism and the speed change electric motor.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: January 5, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hitoshi Yokotani, Hiroatsu Inui, Shinichiro Keyaki
  • Patent number: 7635057
    Abstract: A device for controlling a hydraulically operable switching element (2) of an automatic transmission of a vehicle with a position valve mechanism (3) having a main switch piston (6) which is spring biased into a first switch position and a second switch position with a pilot pressure (P_MV) which is adjustable through an electrically operated actuator (5). An additional switch piston (7) and the main switch piston (6) are axially actuated in a valve housing (8). Depending on the position of the pistons (6, 7), faces (6A, 7A) of the respective pistons are either spaced apart or adjacent. The additional switch piston (7) is adjustable depending on a pilot pressure (p_K) of a switching element which engages a gear for forward drive.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: December 22, 2009
    Assignee: ZF Friedrichshafen AG
    Inventors: Georg Gierer, Thilo Schmidt, Markus Herrmann
  • Patent number: 7635961
    Abstract: A reference position detecting apparatus includes an electric motor and a motor control unit. The electric motor includes a plurality of first coils and a plurality of second coils. The electric motor further includes a rotor that rotates when at least one of the plurality of first coils and the plurality of second coils is supplied with electricity. The motor control unit controls electricity supplied to either one of the plurality of first coils and the plurality of second coils to rotate the rotor to a limit position in a movable range of an object.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: December 22, 2009
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Kiyoshi Kimura, Taku Itoh, Shigeru Yoshiyama, Masashi Hori
  • Publication number: 20090308190
    Abstract: A power transmission apparatus for press machine according to the invention transmits rotational power from a drive shaft to a driven shaft. The apparatus has at least two drive gears arranged along an axial direction and substantially integrally attached to the drive shaft, a driven gear substantially integrally attached to the driven shaft, and an idle gear rotatably supported on an idle shaft and having a gear meshing with the driven gear and a plurality of gears corresponding respectively to the at least two drive gears. The idle gear can be displaced relative to the drive gear along the axial direction of the idle shaft to cause one of the at least two drive gears and corresponding one of the plurality of gears of the idle gear to mesh with each other selectively.
    Type: Application
    Filed: June 1, 2009
    Publication date: December 17, 2009
    Applicant: Aida Engineering, Ltd.
    Inventors: Kaoru Mizuno, Nobuyoshi Maeda
  • Publication number: 20090301242
    Abstract: Arrangement of a hydraulically actuated shift actuator, comprising a shift cylinder (3), arranged outside the hydraulic control unit of a transmission is proposed, in which the shift cylinder (3) of the shift actuator is fixed on a flat or circular machined area (2) on the inside of a housing, and the side of the housing (1) facing away from the shift cylinder (3) has a flat surface (4) on which the hydraulic control unit (5) is fixed in a hydraulically leak-proof manner.
    Type: Application
    Filed: June 29, 2007
    Publication date: December 10, 2009
    Applicant: ZF FRIENDRICHSHAFEN AG
    Inventor: Michael Drabek
  • Publication number: 20090301241
    Abstract: A transmission system including a gear train (7;9) and first and second instantaneous gear selector devices (29,31; 31,33), wherein the gear train is arranged to be selected by the first and second instantaneous gear selector devices (29,31; 31,33).
    Type: Application
    Filed: March 3, 2006
    Publication date: December 10, 2009
    Applicant: ZEROSHIFT LIMITED
    Inventors: William Wesley Martin, Richard John Evan Thompson
  • Patent number: 7628089
    Abstract: A transmission, includes: a shift member, adapted to be moved in a shifting direction and a selecting direction; a plurality of shift lugs, each of which has a pair of first claw portions spaced apart from each other in the shifting direction, and which are arranged in the selecting direction; and a plurality of shift forks, connected to the shift lugs via shift rails.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: December 8, 2009
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventor: Masanori Shintani
  • Patent number: 7624659
    Abstract: An automated manual transmission to which a shift position sensor of the present invention is practically applied has a hydraulic shift actuator that includes a cylinder and a piston that moves in the cylinder in accordance with a speed change operation of the transmission. The shift position sensor comprises a magnet mounted in the piston to move therewith, and a magnaflux detector mounted to a fixed member of the transmission near the hydraulic shift actuator to detect a magnaflux produced by the magnet. The cylinder is so constructed as to cover the magnet even when the piston is subjected to a stroke in the cylinder.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: December 1, 2009
    Assignees: Nissan Motor Co., Ltd., Aichi Machine Industry Co., Ltd.
    Inventors: Makoto Futamura, Masasumi Kitou
  • Patent number: 7624658
    Abstract: A transmission configuration includes an automated dual-clutch transmission having two transmission sections with respective input shafts, respective output shafts and respective motor clutches. The motor clutches are connected, on a motor side thereof, to a drive shaft and to a respective one of the input shafts on a transmission side thereof. A drive-side speed sensor unit is disposed at the drive shaft. An input-side speed sensor configuration includes sensor wheels connected, fixed against relative rotation, to respective ones of the input shafts, and pulse sensors disposed stationary with respect to a housing and within an effective range of the respective sensor wheels. The input-side speed sensor configuration is configured to detect a speed of the input shafts and a direction of rotation of at least one of the input shafts. A method for controlling an automated dual-clutch transmission is also provided.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: December 1, 2009
    Assignees: Volkswagen Aktiengesellschaft, GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG
    Inventors: Jörg Fähland, Bernd Cappelmann, Rainer Hofmann, Ansgar Damm, Günter Rühle, Martin Seufert, Matthias Beck, Josef Glatthaar, Lothar Herdle
  • Patent number: 7610827
    Abstract: An adjusting device for a transmission, such as a motor vehicle transmission is described. The transmission has at least one moveable adjusting element, at least two sensors for detecting a position of the at least one moveable adjusting element, and a code path of the at least one moveable adjusting element having sections of different heights which are provided to be scanned by the at least two sensors, the sections of the code path of different heights being arranged at least two-dimensionally. The at least two sensors are arranged parallel to one another.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: November 3, 2009
    Assignee: Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbH
    Inventors: Wolfgang Doerr, Zoltán Skriba
  • Publication number: 20090266192
    Abstract: A shift control device for a vehicle transmission is provided in which drive means for making a shift drum pivot is connected to the shift drum, wherein the drive means (112) includes a power source (113) disposed on at one end, in the axial direction, of the shift drum (104), and a transmission shaft (117) to which power from the power source (113) is transmitted at the one end, in the axial direction, of the shift drum (104), power from the transmission shaft (117) being transmitted to the other end, in the axial direction, of the shift drum (104). This enables an internal combustion engine to be made compact while avoiding a concentrated disposition of the drive means on one side, in the axial direction, of the shift drum.
    Type: Application
    Filed: August 23, 2007
    Publication date: October 29, 2009
    Inventors: Tomoo Shiozaki, Yoshihisa Kanno
  • Patent number: 7607367
    Abstract: A twin clutch gear transmission for a vehicle is provided for improving speed change control. The twin clutch gear transmission includes an even-numbered-gear-change gear transmission mechanism having a plurality of even-numbered gear-change gear trains which can be selectively established, and an odd-numbered-gear-change gear transmission mechanism having a plurality of odd-numbered gear-change gear trains which can be selectively established. The pair of clutches are capable of individually changing over the disconnection and the connection of power transmission between input shafts, which both gear transmission mechanisms include respectively, and a power source.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: October 27, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Toshimasa Mitsubori, Yoshiaki Tsukada, Masahiro Kuroki
  • Patent number: 7603923
    Abstract: Described herein is a hydraulic servo for a gear change provided with a control shaft; the servo has: a frame; a first hydraulic actuator, which is carried by the frame and has two first chambers, which are alternatively filled with a pressurized fluid for displacing the control shaft axially in the two directions; two first solenoid valves, which control filling of the two first chambers; a second hydraulic actuator, which is carried by the frame and has at least one second chamber that is filled with a pressurized fluid for rotating the control shaft about its central axis; a second solenoid valve, which controls filling of the second chamber; and a supporting body, which is fixed to the frame, houses the solenoid valves, and has inside it a series of hydraulic circuits, which connect the solenoid valves themselves both to the chambers of the actuators and to a supply of the pressurized fluid.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: October 20, 2009
    Assignee: Magneti Marelli Powertrain S.p.A.
    Inventors: Marcello Lorenzoni, Nerio Mengoli, Stefano Giorgini
  • Patent number: 7603922
    Abstract: A method of correcting shift position sensors of a vehicle, the sensors including an inhibitor switch and two or more analog sensors that detect angle displacement between a shift lever and a lever housing as a voltage change. The method includes determining a current condition of a transmission as a range P, when the inhibitor switch outputs signals corresponding to the range P; and inputting signals from the inhibitor switch and from the analog sensors, and determining the current condition of the transmission as a shift range that is indicated by a majority of the signals, when the inhibitor switch outputs signals corresponding to a range other than the range P.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: October 20, 2009
    Assignee: Hyundai Motor Company
    Inventor: Chang-Hyun Kim
  • Patent number: 7603924
    Abstract: A control device 5 for an automatic transmission apparatus 2 has an automatic gearshift mode in which the gear of the automatic transmission 2 is automatically controlled by setting the shift position of a shift device 3 in one of forward travel positions including a first and a second forward position. The control device 5 also has a manual gearshift mode changing the gear one step by one step by an operating unit 4 other than the shift device 3 while maintaining the shift position set in the forward position 33. The manual gearshift mode includes a first manual mode when the shift position of the shift device 3 is set in a first forward position, and a second manual mode when the shift position is set in a second forward position. A control pattern of the first manual mode differs from that in the second manual mode.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: October 20, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kiyohiro Mandou, Yoshinori Furusawa
  • Publication number: 20090255357
    Abstract: A transmission system including first and second shafts (4, 2; 104, 102), a plurality of gear trains arranged to transfer drive between the first and second shafts, an instantaneous selector mechanism (46; 146), and at least one non-instantaneous selector mechanism (40, 44; 140, 144, 153, 157), wherein the instantaneous selector mechanism (46; 146) and the or each non-instantaneous selector mechanism (40, 44; 140, 144, 153, 157) are arranged to create torque paths between the first and second shafts (4, 2; 104, 102) via the gear trains, wherein each gear train is selectable when one other gear train is transmitting torque.
    Type: Application
    Filed: May 18, 2006
    Publication date: October 15, 2009
    Applicant: Zeroshift Limited
    Inventors: William Wesley Martin, Richard John Evan Thompson
  • Patent number: 7597019
    Abstract: A transmission operating apparatus for a vehicle includes a shift lever manipulable by a driver, and at least one counterforce applying unit which electrically applies a counterforce counteracting a shifting operation of the shift lever to the shift lever corresponding to a respective position of the shift lever. The counterforce to be applied to the shift lever by the counterforce applying unit is changed when predetermined conditions are satisfied.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: October 6, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventor: Shinichi Yone
  • Patent number: 7591757
    Abstract: A shift lever device for transmission operation of a vehicle has a shift lever, a locking member, a withdrawing member and a biasing member. When force is applied to the shift lever due to transmission operation of the shift lever by a vehicle occupant, the withdrawing member is pushed, and, due to a component of force thereof, is withdrawn from a path of movement for transmission operation of the shift lever. When the locking member is set in a movement limited state due to operation of the vehicle occupant, the locking member impedes movement of the shift lever due to transmission operation. When the locking member is set in a movable state, the locking member as well is, by a torsion spring, interlocked with the withdrawing member and withdrawn from the path of movement of the shift lever.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: September 22, 2009
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventor: Naoki Otashiro
  • Patent number: 7591203
    Abstract: A vehicular control apparatus for a vehicle has a twin clutch type automatic transmission. The control apparatus comprises an external information acquisition apparatus for acquiring external information required for vehicular transmission control, an input section for taking in the external information from the external information acquisition apparatus; and a pre-shift gear selection section for selecting a predetermined gear train among plural gear trains of the transmission to execute a pre-shift in accordance with the external information.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: September 22, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuya Ochi, Takashi Okada, Hiroshi Sakamoto, Masato Imai, Tetsuo Matsumura
  • Publication number: 20090229393
    Abstract: A speed change control system capable of carrying out an entire speed change operation of a transmission in which speed change operations of first and second speed change units are carried out simultaneously in directions opposite to each other, without deteriorating shocks even in case a speed change operation of one of the speed change units is restricted. The speed change control system includes first and second speed change units, and in which a speed change ratio of the second speed change unit is changed in a direction opposite to a changing direction of a speed change ratio of the first speed change unit when changing the speed change ratio of the first speed change unit. A speed changing rate setting mechanism sets a speed changing rate of the second speed change unit in accordance with a progression of a speed change operation of the first speed change unit.
    Type: Application
    Filed: October 26, 2006
    Publication date: September 17, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Shibata, Tooru Matsubara, Atsushi Tabata
  • Patent number: 7584681
    Abstract: An automatic transmission control system equipped with a shift lever position sensor which includes a plurality of switches which output binary signals following a shifting motion of a gear shift lever. Patterns of combinations of the switch outputs are preselected so as to represent positions to which the gear shift lever is manually shiftable. The switches are broken down into two groups each of which produces a binary code carrying information about the position of the gear shift lever to monitor a failure in operation of the shift lever position sensor. The control system also works to perform a deemed D-position hydraulic transmission control to ensure the running of the vehicle even if the shift lever position sensor is failing.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: September 8, 2009
    Assignee: Denso Corporation
    Inventors: Tetsuji Kozaki, Takaji Murakawa
  • Patent number: 7585243
    Abstract: The present invention provides an automatic transmission having a main bearing disposed between the inner surface of a boss portion of a first drum and the outer surface of a cylindrical support, for rotatably supporting the first drum. An auxiliary bearing is press-fit into one end of the interior of the boss portion of the first drum and surrounds the cylindrical support with an annular gap therebetween. The auxiliary bearing contacts the cylindrical support only when the first drum tilts relative to the central axis of the transmission, and has a shorter axial length than that of the main bearing.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: September 8, 2009
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsuhisa Ishii, Minoru Todo, Mikio Iwase, Takuya Nakajima, Hirofumi Ota, Kazutoshi Nozaki, Atsushi Honda, Masafumi Kinoshita
  • Patent number: 7584680
    Abstract: A transmission comprises an input shaft, an output shaft assembly, cylinder arm assemblies; and a rod-translation system. The input shaft comprises opposing input shaft ends, a rotation transmissive portion, and an axis of rotation. The transmissive portion extends intermediate the input shaft ends for transferring engine-originated rotational motion to the transmission assembly. The arm assemblies are concentric about the axis of rotation and comprise opposing arm ends, and an inner arm diameter. First arm ends are each independently geared to the transmissive portion via the inner arm diameters. The output shaft assembly comprises a stepped ring and an output shaft. The rod-translation system functions to translate a series of rods intermediate an arm-engaged position and an arm-disengaged position. First rod ends engage an output arm end when in the arm-engaged position for imparting rotational movement from the output arm end to the output shaft via the stepped ring.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: September 8, 2009
    Inventors: Michael A Malpier, Don B. Blasing
  • Patent number: 7581462
    Abstract: A transmission includes: a shift member, adapted to be moved in a shifting direction and a selecting direction; a shift lug, having a pair of claw portions spaced apart from each other in the shifting direction; and a shift fork, connected to the shift lug via a shift rail. The shift member is moved by an actuator to push one of the claw portions in the shifting direction to thereby selectively move the shift lug in the shifting direction so as to cause the shift fork to perform a gear shift operation via the shift rail. The pair of claw portions are disposed so as to be offset from each other in the selecting direction.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: September 1, 2009
    Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Jidosha Engineering Kabushiki Kaisha
    Inventors: Masanori Shintani, Koji Kasuya
  • Publication number: 20090205450
    Abstract: In a group transmission having a number of countershafts, wherein three input constants are provided on a transmission input shaft for driving a countershaft such that the group transmission is of very short construction, the transmission input shaft is connectable to an intermediate shaft for direct power transmission, with the countershaft being disconnectable in the direct gear in order to avoid drag losses.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 20, 2009
    Inventor: Carsten Gitt
  • Patent number: 7571662
    Abstract: A rotatable selector mechanism for a motor vehicle transmission has a selector knob rotatable in a housing to select an operating mode of the transmission among a number of selector positions indicated by a label (P,R,N,D,M). The selector mechanism further includes a detent plate which cooperates with a detent pin for maintaining the selector knob in each of positions. The detent plate is connected to position sensors for generating selector signals to a transmission control unit which supplies control signals to an actuator for operate the transmission according to the operating mode selected. The detent plate is also associated to the selector knob and to a drive correction means by means of clutch devices respectively to engage the detent plate to one of the selector knob and the drive correction means.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: August 11, 2009
    Assignee: Jaguars Cars Limited
    Inventors: Carl Pickering, Alister Whelan, Mike Richardson, Rob Jerger, Peter Hudson
  • Patent number: 7572203
    Abstract: An SBW storage of an SBW controller stores a rotational angular position of an output shaft of an electric actuator. When the SBW controller is restarted due to instantaneous power interruption, the SBW controller maintains and uses the current angular position of the output shaft, which is stored in the SBW storage device, as a latest rotational angular position of the output shaft that is used to drive a shift range change mechanism upon satisfaction of the following conditions: the electric motor has not been driven before the instantaneous power interruption, and the current rotational angular position of the output shaft, which is stored in the SBW storage device, is not destroyed.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: August 11, 2009
    Assignee: DENSO Corporation
    Inventors: Tomoyuki Kashiwagi, Haruki Matsuzaki, Masashi Hori
  • Publication number: 20090193918
    Abstract: A twin clutch transmission for reducing the frequency of hit noise occurring in a dog clutch when shifting from neutral to a first speed. The twin clutch transmission includes a plurality of pairs of gears according to the number of speed stages between dual-structured main shafts and a countershaft. A twin clutch is disposed on the main shafts wherein a rotational drive force of an engine is transferred or blocked. A transmission between adjacent speed change gears on each shaft by a dog clutch occurs with a shift drum for switching between an engagement condition of the dog clutch by driving a shift fork. The patterns of guide grooves in the shift drum are formed wherein the dog clutches for a first speed gear and a second speed gear engage simultaneously when the shift drum is rotated by predetermined angles to shift from neutral to the first speed.
    Type: Application
    Filed: January 12, 2009
    Publication date: August 6, 2009
    Inventors: Yoshiaki TSUKADA, Takashi Ozeki, Hiroyuki Kojima, Yoshiaki Nedachi
  • Patent number: 7568402
    Abstract: A fault-tolerant gear selector lever position apparatus is described. Included is a first sensor operable to detect each position, and a second sensor operable to detect subsets of the positions. A first controller monitors the second sensor, and a second controller monitors the first sensor. The second controller identifies and communicates one of the positions to the first controller, and the first controller validates the position and communicates the position to a control system. The lever is applicable to a power transmission device. Each sensor preferably comprises digital encoding sensor; the first sensor generates a unique signal for each position, and the second sensor generates a unique signal for each subset of the positions, preferably a unique signal for each of Park, Reverse, Neutral, and Forward Drive. The controllers identify faults in the sensors, and communicate and act accordingly.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: August 4, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Richard E. Robinette, Peter E. Wu
  • Patent number: 7568403
    Abstract: A transmission configured to change a gear position by rotation of a shift drum operative in association with an operation of a change pedal, including a potentiometer configured to detect a rotational angle of the shift drum; and a determiner configured to determine a gear position based on whether or not a value of a signal output from the potentiometer falls within a determination band having a predetermined range.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: August 4, 2009
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Yoshimoto Matsuda, Takao Kaneko
  • Patent number: 7567051
    Abstract: A position shift control apparatus is provided which includes an electrical motor joined to an object through an output shaft and a torque transmission mechanism, a detent mechanism producing elastic pressure to hold the object at a target position, and a motor controller. When torque, which is created by the elastic pressure produced by the detent mechanism and acts on the output shaft during rotation of the motor, is opposite in orientation to that outputted by the motor, the motor controller determines the angular position of the motor, as sampled upon a change in an output from an output shaft position sensor, as a reference angular position of the motor for use in controlling the position of the motor, thereby resulting in a decrease in mechanical load on the detent mechanism and the torque transmission mechanism to ensure the durability and operation accuracy of the apparatus.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: July 28, 2009
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Masashi Hori, Haruki Matsuzaki, Tomoyuki Kashiwagi, Masaaki Shinojima
  • Patent number: 7559874
    Abstract: A shift mechanism for a transmission in a vehicle includes a housing, a shift lever, a key cylinder and an actuator. The actuator operably connects to the key cylinder and is capable of movement between a first position that prevents the shift lever from changing shift positions, and a second position that allows the shift lever to change shift positions.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: July 14, 2009
    Assignee: Chrysler LLC
    Inventors: Gregory F. Fischer, Donald J. Stewart, Scott Munro, Robert L. Brown, David P. Jacobs
  • Publication number: 20090165583
    Abstract: A shift drum drive system for a transmission includes a drive member and a power transmission device configured to transmit the rotational power of the drive member to a shift drum. The drive member and at least a part of the power transmission device being disposed on a lateral side of a crankcase on the side of one end in the axial direction of the shift drum, to reduce the area occupied by the shift drum drive system inclusive of the drive member on a lateral side of the crankcase on the side of one end in the axial direction of the shift drum, and thereby to contrive a reduction in engine size. The drive member and the shift drum are disposed so as to at least partly overlap with each other when viewed along the axial direction of the shift drum.
    Type: Application
    Filed: September 26, 2008
    Publication date: July 2, 2009
    Inventors: Atsushi OGASAWARA, Yasushi Fujimoto
  • Patent number: 7552659
    Abstract: A gearshift device includes a gearshift lever adapted to move a plurality of gear selection positions, and a gear selection position detecting unit which detects a gear selection position. The gear selection position detecting unit has a magnet plate disposed at a lower end portion of the gearshift lever and movable in accordance with a movement of the gearshift lever and primary magnetic sensors and at least one secondary magnetic sensor, which are disposed so as to oppose to the magnet plate in a non-contact fashion at predetermined positions based on the individual gear selection positions. The primary magnetic sensor detects magnetic flux density and outputs ON/OFF signals in accordance with intensity of the detected magnetic flux density The secondary magnetic sensor detects magnetic flux density and outputs an output value according to the detected magnitude of the magnetic flux density.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: June 30, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Atsushi Komatsu, Kotaro Hiramine, Yoshiharu Saito
  • Patent number: 7549351
    Abstract: A shift control system rotates an actuator to cause a wall of a detent plate to contact a roller of a detent spring, and detects the position of contact so as to detect the position of the wall of the detent plate. This wall position is set as a reference position of the actuator. Accordingly, the rotation of the actuator can appropriately be controlled even if an encoder which can only detect relative positional information is employed, and thus the shift range can appropriately be switched.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: June 23, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Sumiko Amamiya, Tatsuya Ozeki, Shigeru Kamio, Yasuhiro Nakai, Taku Itoh, Kazuo Kawaguchi, Yasuo Shimizu
  • Patent number: 7549352
    Abstract: A shift control system rotates an actuator to cause a wall of a detent plate to contact a roller of a detent spring, and detects the position of contact so as to detect the position of the wall of the detent plate. This wall position is set as a reference position of the actuator. Accordingly, the rotation of the actuator can appropriately be controlled even if an encoder which can only detect relative positional information is employed, and thus the shift range can appropriately be switched.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: June 23, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Sumiko Amamiya, Tatsuya Ozeki, Shigeru Kamio, Yasuhiro Nakai, Taku Itoh, Kazuo Kawaguchi, Yasuo Shimizu
  • Publication number: 20090151491
    Abstract: A power transmission apparatus for a vehicle includes: a first shift unit; a second shift unit; an electric motor connected to a rotating element of the first shift unit or the second shift unit so that the rotational speed changes in accordance with a gear-shift of the first shift unit or the second shift unit; and a control unit that controls at least one of start timings of inertia phases of the gear-shifts of the first and second shift units using the electric motor, when the gear-shifts of the first and second shift units are performed simultaneously and gear ratios of the first and second shift units are changed in opposite directions. With this control, in the simultaneous gear-shift, the gear-shift of one of the shift units is started and completed in a period from start of the gear-shift of the other shift unit until completion of this gear-shift.
    Type: Application
    Filed: December 8, 2008
    Publication date: June 18, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Kenta Kumazaki, Tooru Matsubara
  • Publication number: 20090145253
    Abstract: A shifting control system has two gear shift stage groups, two clutches, a clutch release detection section, a pre-shift controller, a clutch oil level detection section and a pre-shift inhibiting section. The clutches are alternately engaged to selectively transmit power from an engine to a wheel. The clutch release detection section detects a release-side clutch which corresponds to the clutch that is in a released state. The pre-shift controller operates a meshing mechanism of the gear shift stage group corresponding to the release-side clutch, so as to undergo pre-shifting when the other clutch is engaged as an engage-side clutch. The clutch oil level detection section determines whether an oil level in the release-side clutch is equal to or greater than a preset oil level. The pre-shift inhibiting section inhibits pre-shifting while the oil level in the release-side clutch is equal to or greater than a preset oil level.
    Type: Application
    Filed: November 18, 2008
    Publication date: June 11, 2009
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Shusaku KATAKURA, Sadamu FUJIWARA
  • Publication number: 20090150033
    Abstract: A shift position detecting device comprises a shift position sensor that continuously issues an output data that represents a shift position of the gear selection mechanism; and a control unit.
    Type: Application
    Filed: November 7, 2008
    Publication date: June 11, 2009
    Inventor: Yoshinobu KAWAMOTO
  • Patent number: 7543515
    Abstract: An adjusting device for a transmission is described. The device has at least one movable adjusting element, a plurality of sensors for detecting a position of the at least one movable adjusting element, which are arranged substantially parallel to one another, and a plurality of cam paths having sections of different heights, assigned to corresponding ones of the plurality of sensors. The device also includes a plurality of scanning elements coupled to the plurality of sensors for mechanically scanning the sections of different height, and at least one catch of each of the plurality of cam paths in which a latching element is engageable, wherein the plurality of sensors and the latching element are designed as a common component. The plurality of cam paths result in comparable stroke movements arising for each of the plurality of scanning elements.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: June 9, 2009
    Assignee: Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbH
    Inventors: Wolfgang Doerr, Zoltan Skriba
  • Publication number: 20090139355
    Abstract: A dual clutch transmission may include: a control bar including a hole; a first rail and a second rail that are respectively disposed along the control bar; first springs biasing the first rail and the second rail respectively; a first stopper and a second stopper that are mounted in respective inner grooves of the first rail and the second rail; second springs that elastically support the stoppers and insert the stoppers into the hole according to the movement of the rails; and a first release rug and a second release rug selectively holding the stoppers.
    Type: Application
    Filed: November 19, 2008
    Publication date: June 4, 2009
    Applicant: Hyundai Motor Company
    Inventor: Hang Cheol CHO
  • Patent number: 7540209
    Abstract: A vehicle transmission includes a plurality of shift shafts that cooperate with a common neutral switch to control when range shifts occur. In one example, the plurality of shift shafts includes a first shift shaft, a second shift shaft, and a third shift shaft that is positioned between the first and second shift shafts. A plunger actuates the neutral switch in response to movement of the third shift shaft along an axis. A first switch pin is positioned between the first shift shaft and the plunger and a second switch pin is positioned between the second shift shaft and the plunger. The first and second switch pins move the plunger to actuate the neutral switch in response to axial movement of a respective one of the first and second shift shafts. Thus, each of the first, second, and third shifts shafts can actuate a single neutral switch by cooperating with a common plunger.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: June 2, 2009
    Assignee: ArvinMeritor Technology, LLC
    Inventors: Patrick L. Scheib, Kenneth T. Picone
  • Patent number: 7540210
    Abstract: An electrical switch assembly is provided for an electronically controlled transmission that allows user selection between a plurality of shift schedules for the transmission. The switch assembly provides a signal for selecting among the plurality of shift schedules and has a housing. A first set of electrical contacts are positioned within the housing, and selectively closable to cause the input signal to be indicative of a selection of a first shift schedule. A second set of electrical contacts are positioned within the housing and are selectively closable to cause input signal to be indicative of a selection of a second shift schedule.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: June 2, 2009
    Assignee: Chrysler LLC
    Inventors: Michael Mashkevich, Jeffrey C Hendry, Laura Porrone