Patents Assigned to JTEKT
  • Vehicle steering system
    Patent number: 9061699
    Abstract: In a vehicle steering system provided in a vehicle in which a high-voltage battery is provided, a clutch mechanism is mechanically disconnected and the intermediate shaft falls, after a collision of the vehicle is detected. An ECU detects the collision of the vehicle based on an acceleration that is input, and then detects contraction of the column shaft and disconnection of the clutch mechanism based on an ON signal of a microswitch. Thereafter, the ECU is able to continue to rotationally drive an electric motor based on a steering angle signal that is output from a steering angle sensor provided on the column shaft, and that is electrically insulated through a photo coupler, and thus the ECU causes the vehicle to travel and stop.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: June 23, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Shohei Ogi
  • ECCENTRIC YOKE WITH BACKLASH COMPENSATION FOR THE STEERING SYSTEM OF A MOTOR VEHICLE
    Publication number: 20150166096
    Abstract: The yoke device comprises a rotary pad (10), the inner periphery (11) of which is eccentric with respect to the outer periphery (12) and is applied against the back of the rack, which is thus pushed towards the teeth of the steering pinion. The rotary pad (10) is rotationally biased and positioned by a backlash compensation mechanism (17) with spring means. This mechanism comprises a rotating movable stop (21), including gearings (24, 25) having staggered teeth that engage with the notches (26, 27) of a push member (19). The staggered gear teeth comprise, on one sector, a pilot gearing (24) having planar teeth (28) provided with a protrusion (29) and, in another sector, at least one gearing (25) having planar teeth (30) with no protrusion.
    Type: Application
    Filed: April 23, 2013
    Publication date: June 18, 2015
    Applicant: JTEKT EUROPE
    Inventor: Patrice Brochot
  • LUBRICANT OIL, FRICTION MEMBER, AND GEAR-TYPE DIFFERENTIAL WITH DIFFERENTIAL LIMITING FUNCTION
    Publication number: 20150166925
    Abstract: A lubricating oil according to the present invention is a lubricating oil used in a friction-type driving force transmission apparatus, the lubricating oil including: at least one of two additives; a first additive selected from at least one of an aliphatic amine having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 1) and an aliphatic amine ethylene oxide adduct having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 2); and a second additive selected from at least one of a phosphorous acid diester having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 3) and a phosphorous acid monoester having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 4).
    Type: Application
    Filed: December 17, 2014
    Publication date: June 18, 2015
    Applicants: JTEKT Corporation, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hiroyuki ANDO, Junji Ando, Kazutaka Matsukawa, Toshimi Hara, Mototake Furuhashi, Mamoru Tohyama, Toshihide Ohmori, Yasuo Esaki, Chihiro Kanzawa, Keiko Fukumoto
  • Vehicle steering system
    Patent number: 9056625
    Abstract: There is provided a vehicle steering system that facilitates fine steering of a vehicle body regardless of the operated state of a steering wheel. The steering wheel is provided with a lever used to operate the steering wheel. A support mechanism supports and rotates the lever relative to the steering wheel such that the lever is tiltable in the rightward direction and the leftward direction relative to the vehicle body regardless of a turning angle of the steering wheel. The support mechanism includes a support member fixed to the steering wheel, a base disposed on the support member and rotatably supported by the support member, and a gear mechanism used to rotate the base as the steering wheel is turned.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: June 16, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Takashi Tashiro, Akihiro Takazato
  • Balancer shaft device
    Patent number: 9057418
    Abstract: A rolling bearing of a balancer shaft device is positioned on an imaginary circle concentric with an axis of a shaft portion of a balancer shaft as viewed in a radial cross-section, and includes a cylindrical portion which covers the shaft portion. An outer circumferential surface of the cylindrical portion defines an inner ring raceway surface of an inner ring member on which a rolling element of the rolling bearing rolls. A part of the shaft portion of the balancer shaft, at a position on which the rolling bearing is disposed, has a cutout formed at a portion which does not contribute to offsetting of rotational vibration of a crankshaft.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: June 16, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Yoshitaka Waseda, Kenichi Nakaoka, Motoichi Murakami, Kenichi Harada
  • Four-wheel drive vehicle
    Patent number: 9057430
    Abstract: A four-wheel drive vehicle includes: a driving force transmission system which transmits torque of a drive source to front wheels and rear wheels via gear mechanisms; a clutch provided in the driving force transmission system and capable of controlling an amount of the torque transmitted to the rear wheels; and a pressing mechanism which presses the clutch by transforming a part of the torque transmitted to the rear wheels into axial thrust. In the driving force transmission system, gear ratios of the gear mechanisms are set such that a direction of a differential rotation between a drive shaft connected to an input side of the clutch and a drive shaft connected to an output side of the clutch is not reversed even when a steered angle of the front wheels changes to a maximum value while the four-wheel drive vehicle is traveling forwards.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: June 16, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Masahiro Horaguchi, Akihiro Ohno, Hiroshi Takuno, Takashi Hosokawa
  • Torque detecting apparatus
    Patent number: 9057652
    Abstract: A torque detecting apparatus detects a torque applied to a first shaft, based on a relative rotational displacement between the first shaft and a second shaft caused by torsion in a coupling shaft which couples the first shaft and the second shaft. The torque detecting apparatus includes: first and second magnets which are coupled to the first shaft and the second shaft so as to rotate together with the first shaft and second shaft, respectively; and a plurality of magnetic sensors which are disposed between the first magnet and the second magnet and which detect a rotational angle of the first shaft and a rotational angle of the second shaft.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: June 16, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Yasunobu Tomizawa, Hideki Higashira, Seiji Uematsu, Takeshi Ueda, Yoshinobu Shimizu
  • Tapered roller bearing apparatus and hub unit
    Patent number: 9051964
    Abstract: A tapered roller bearing apparatus includes: an outer ring that includes an outer-ring raceway formed in an inner circumferential surface thereof; an inner ring which includes a large-diameter portion having a cylindrical portion with a substantially uniform outer diameter, a large rib portion having an outer circumferential surface and a guide surface continued to the outer circumferential surface, an inner-ring raceway, and a small-diameter cylindrical portion which are sequentially formed from one end to the other end, and are subjected to a heat treatment to have a surface-hardened layer; and a plurality of tapered rollers which are rollably disposed between the inner-ring raceway and the outer-ring raceway, a large-diameter end surface of the tapered roller being guided by the guide surface. An angle formed between the guide surface and the outer circumferential surface is obtuse.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: June 9, 2015
    Assignee: JTEKT Corporation
    Inventors: Kiichiro Yamashita, Masao Takimoto, Youichi Tsuzaki
  • Grinding method, grinding system and multifunction grinding machine
    Patent number: 9050701
    Abstract: A rough grinding process grinds the workpiece W supported by the supporting device by the rough grinding wheel until a preset stock amount for finish grinding remains, and then the finish grinding process finish grinds the stock amount while the workpiece W is continuously supported by the supporting device. The stock amount for finish grinding is set based on at least one of a thermal displacement of the multifunction grinding machine and a changing amount of grinding force of the rough grinding wheel. A profile remaining the stock amount for finish grinding is a profile not depending on a profile of the rough grinding wheel.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: June 9, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Satoshi Yamaguchi, Yoshihiro Mizutani
  • Electric power steering system
    Patent number: 9051004
    Abstract: A controller of an electric power steering system includes: a basic assist component computing unit (60) that computes a first assist component (Ta1*) based on a steering torque (Th); a steered angle command value computing unit (61) that computes a steered angle command value (?t*) based on the sum of the steering torque (Th) and the first assist component (Ta1*); and a steered angle feedback controller (62) that computes a second assist component (Ta2*) through feedback control on an actual steered angle (?t). The controller further includes: a correction component computing unit (65) that computes a correction component (Tc*) based on a steering angle (?s); and an assist command value computing unit (50) that computes an assist command value (Ta*) by subtracting the correction component (Tc*) from the sum of the first assist component (Ta1*) and the second assist component (Ta2*).
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: June 9, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Terutaka Tamaizumi, Masayuki Kita, Isao Namikawa, Hirozumi Eki
  • Assembly method and assembly equipment for power transmission chain
    Patent number: 9050649
    Abstract: Portions of a pair of first pin members, a pair of second pin members, and a pair of third pin members other than one end portions thereof are respectively inserted into and held in a pair of first holding holes, a pair of second holding holes and a pair of third holding holes that extend perpendicularly to reference surfaces that are top faces of first to third connected body assembly jigs. In this state, a single first link plate, a single second link plate and a third link plate are press-fitted onto the one end portions until the first to third link plates come into contact with the reference surfaces. In this way, first to third multiple connected bodies are assembled. Then, the first to third multiple connected bodies and multiple fourth link plates are assembled into a power transmission chain.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: June 9, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Yasushi Kadota, Shinji Yasuhara, Taizou Wakayama
  • Power generating apparatus
    Patent number: 9054560
    Abstract: A wind power generator includes: an input rotor provided so as to be rotatable together with an output shaft of a speed increaser; an output rotor provided so as to be rotatable together with a drive shaft of a generator; and a one-way clutch arranged between the input and output rotors. The one-way clutch connects the input rotor to the output rotor such that the input rotor and the output rotor are rotatable together with each other when a rotation speed of the input rotor exceeds a rotation speed of the output rotor, and that disconnects the input rotor from the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor. The one-way clutch has a rotation speed limiter that disconnects the input rotor from the output rotor when the rotation speed of the output shaft exceeds a predetermined value.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: June 9, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Hideki Fujiwara
  • Electromagnetic valve
    Patent number: 9046189
    Abstract: An electromagnetic valve includes: a valve main body including an inlet and an outlet of a fluid; a valve body to be seated on a valve seat provided between the inlet and the outlet; a movable iron core separating the valve body from the valve seat to communicate the inlet with the outlet; and a fixed iron core attracting the movable iron core by energization of a coil to axially drive the movable iron core. The valve main body includes an insertion hole into which a guide member is inserted and a stopper portion to stop the guide member biased by a pressure of the fluid. The guide member includes a sliding hole in which the movable iron core is axially movable, and is arranged in the insertion hole in a slidable manner with respect to the valve main body to be biased by the pressure of the fluid.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: June 2, 2015
    Assignees: TOYOOKI KOGYO CO., LTD, JTEKT CORPORATION
    Inventor: Noritaka Watanabe
  • Transmission driving device
    Patent number: 9046173
    Abstract: A transmission driving device that is capable of preventing displacement of a shift operation member or a select operation member in a case where there is reverse input in the shift operation member or the select operation member by inhibiting rotation of a rotation member which is released from an input shaft. When an input shaft and a first rotor are connected, the first electromagnetic coil is an excitation state and a second electromagnetic coil is in a non-excitation state. In this state, a second magnetic ring is not attracted to the side of the second electromagnetic coil, a seventh facing, which is fixed to the second magnetic ring, and an eighth facing are engaged with each other, and a second rotor and a casing are connected to each other. In a connection state of the second rotor and the casing, the second rotor cannot be rotated.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: June 2, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Hiroki Kagawa, Yasuhiro Yukitake
  • Torque sensor
    Patent number: 9046429
    Abstract: A torque sensor includes a first resolver that outputs a signal corresponding to a rotation angle of a first rotor fitted on an outer periphery of a first rotary shaft, and a second resolver that outputs a signal corresponding to a rotation angle of a second rotor fitted on an outer periphery of a second rotary shaft coupled to the first rotary shaft via a torsion bar. The torque sensor detects a torque exerted on the first rotary shaft or the second rotary shaft based on the signals output from the first resolver and the second resolver. A first junction between the first rotary shaft and the first rotor, and a second junction between the second rotary shaft and the second rotor are formed so as to have different shapes or different sizes.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: June 2, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Toshie Hibi, Osamu Takahashi
  • Electric power steering apparatus
    Patent number: 9045157
    Abstract: A zero point change model executes banked road correspondence control when a vehicle travels on a banked road. By this control, a target turning angle when the total torque is zero can be changed from a neutral turning angle to a lower side of an inclined road surface. Thus, a steering angle of a steering wheel according to a banked road can be realized even if the driver does not apply steering torque during traveling on a banked road. Accordingly, the driver can obtain a suitable steering feeling when traveling on a banked road while achieving the target turning angle according to the total torque.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: June 2, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Terutaka Tamaizumi, Hirozumi Eki, Masayuki Kita, Isao Namikawa
  • Electrical power steering apparatus
    Patent number: 9038764
    Abstract: A motor control circuit includes a power relay, a converter division, a smoothing condenser, a control circuit and a motor drive circuit, and is connected to a battery as high voltage power and to an electrical motor. The battery is connected with a driving battery having the high voltage such as 288V etc. A step down circuit reduces the high voltage to a low voltage such as 36V etc., charges a low voltage charge device and supplies drive power to the motor drive circuit. When the vehicle collision is occurred, the control circuit detects the collision by a value of detected acceleration, a power change relay is turned on to change to the power source from the low voltage charge device after voltage of the smoothing condenser is reduced, thereby connecting the low voltage to the motor drive circuit.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: May 26, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Motoo Nakai
  • Actuator control apparatus
    Patent number: 9043089
    Abstract: There is provided an actuator control apparatus configured such that even when an electronic device that generates an electric signal to be used to control an actuator is provided in the form of a duplexed system, an increase in the number of communication paths between the electronic device and a controller is suppressed. A torque sensor and a rotation angle sensor are each provided in the form of a duplexed system. Two sets of a torque sensor and a rotation angle sensor are connected to a microcomputer via a SPI communication line. The torque sensors and the rotation angle sensors are connected to the microcomputer via CS communication lines, respectively. By selecting a communication target via a corresponding one of the CS communication lines, the microcomputer is able to receive multiple kinds of electric signals via each one of the SPI communication lines.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: May 26, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Kazuya Sakai, Tsutomu Matsumoto, Atsuo Sakai, Kenichi Kozuka, Takehide Adachi
  • Vehicle steering system
    Patent number: 9043091
    Abstract: When a partial malfunction is detected, a sensor malfunction determination unit changes a control mode from a first control mode to a second control mode. When the control mode is changed from the first control mode to the second control mode, a steered system motor is rotated in a direction corresponding to a rotation direction of a steering wheel immediately before the partial malfunction occurs in the angle sensor. When the absolute value of a steering angular velocity of the steering wheel exceeds a threshold, it is determined that a driver has operated the steering wheel in a direction opposite to a current steered direction, and the rotation direction of the steered system motor is reversed.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: May 26, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Ryouhei Hayama
  • Cage and thrust roller bearing including cage
    Patent number: 9039290
    Abstract: A cage, which is annular, and is used in a thrust roller bearing, includes a plurality of cage segments arranged in a circumferential direction. Each of the cage segments includes an arc portion; and a bar portion that extends radially inward from the arc portion and that maintains a circumferential interval between rollers adjacent to each other. A groove portion extending along an axial direction is formed at each of end faces of the arc portions, the end faces facing each other in the circumferential direction. In the cage, elastic bodies are inserted into the groove portions and urge the arc portions in the circumferential direction, each of the elastic bodies is disposed between the end faces facing each other, and the cage segments are connected to each other by the elastic bodies.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: May 26, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Ryou Takahashi