Patents Assigned to Nippon Soken, Inc.
  • Patent number: 9583290
    Abstract: A solenoid device includes at least one electromagnetic coil for generating a magnetic flux when energized, a fixed core constituting part of a magnetic circuit through which the magnetic flux passes, and plungers constituting the magnetic circuit together with the fixed core and configured to advance to and retract from the fixed core depending on whether the magnetic coil is energized or de-energized. The magnetic circuit is provided with a magnetic resistance part as a resistance for the magnetic flux. The plungers are configured to be attracted to the fixed core by energizing the electromagnetic coil.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: February 28, 2017
    Assignees: NIPPON SOKEN, INC., ANDEN CO., LTD.
    Inventors: Masakatsu Horiguchi, Ken Tanaka, Tomoaki Tanaka, Takashi Ito
  • Patent number: 9577535
    Abstract: A power conversion apparatus includes a switch circuit which drives switching elements based on a control signal, a feedback section which performs feedback control, a signal output section which outputs the control signal based on a controlled variable of the feedback control, an output value detecting section which detects an output value outputted from the switch circuit, and an operation determining unit which has an operation stop determination section which determines whether to stop operation of the switching elements based on a rate of change of the output value, and an operation start determination section which determines whether to start operation of the switching elements based on the controlled variable.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: February 21, 2017
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Norihito Kimura, Kimikazu Nakamura, Yuji Hayashi
  • Patent number: 9570758
    Abstract: A method of manufacturing a fuel cell. An insulating member has a plurality of communication holes disposed on a side of a gas diffusion layer, which is formed by stacking a layer made of a carbon fiber and a water-repellent layer, where the water-repellent layer is provided. The gas diffusion layer and the insulating member are sandwiched by a pair of electrodes, and a pair of contact pressure plates are disposed on respective rear surfaces of the pair of electrodes so as to sandwich the pair of electrodes so that the gas diffusion layer is pressurized by the pair of contact pressure plates. When a voltage is applied to the pair of electrodes while maintaining the pressurized state, the protrusion portion of the carbon fiber is burned and removed by Joule heat.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: February 14, 2017
    Assignees: NIPPON SOKEN, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuichi Gomi, Katsuhide Kikuchi, Hiroshi Fujitani, Akito Kawasumi, Junji Nakanishi, Kenji Tsubosaka
  • Patent number: 9568380
    Abstract: A torque sensor includes: a base portion fixed to a metal shaft having a rod shape as a measurement object of strain; a strain detection element of a surface acoustic wave type which is arranged in the base portion, and detects the strain of the metal shaft (10) through the base portion; and a fixing portion that is arranged between the base portion and the strain detection element, and fixes the strain detection element to the base portion.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: February 14, 2017
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Shuntaro Yoshida, Takao Iwaki, Inao Toyoda, Takuya Ishikawa, Akira Okada, Kazumasa Ogino
  • Patent number: 9556759
    Abstract: A valve timing controller has a driving rotor, a driven rotor, and a planet gear engaged with the driving rotor and the driven rotor to control a rotation phase of the driven rotor relative to the driving rotor by carrying out planet movement. The driven rotor has a contact surface in contact with a tip end of a chamfering portion of a camshaft, and a feed port passing through the driven rotor in an axial direction to introduce lubricant supplied from the camshaft into the driving rotor. The feed port has an outer edge part located on a radially outer side. The outer edge part, on a side adjacent to the contact surface, is located on a radially outer side of the tip end of the chamfering portion and is located on a radially inner side of an outer circumference part of the journal portion.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: January 31, 2017
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Makoto Otsubo, Hiroki Takahashi, Masaya Misaki
  • Patent number: 9556869
    Abstract: A gear pump apparatus is equipped with a pump and a sealing mechanism which is made up of an outer member, an inner member, and a rubber member fit between the outer and inner members. The inner member has a pressure-exerted surface to which pressure, as produced by contact of the rubber member with the inner member arising from application of discharge pressure of the pump, is applied. The pressure-exerted surface has a flange which creates thrust to move the inner member away from the gear pump, thereby bringing the inner member against an inner wall of a pump casing to develop a hermetical seal between a high-pressure region and a low-pressure region within the pump casing. This eliminates the leakage of pressure and ensures torque required for a pumping operation of the pump.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: January 31, 2017
    Assignees: NIPPON SOKEN, INC., DENSO CORPORATION, ADVICS CO., LTD.
    Inventors: Takashi Hashiba, Naoki Hakamada, Kazunori Uchiyama, Takahiro Naganuma, Tomoaki Kawabata, Kunihito Ando
  • Patent number: 9545842
    Abstract: A power transmission apparatus for a vehicle is provided which is equipped with a power split device and a speed variator. The power transmission device is designed to set a speed ratio of speed of rotation of an output of a power source to speed of rotation of a driven wheel in a power circulation mode of a power split device to lie within one of a positive range in which a sign of the speed ratio is positive and a negative range in which a sign of the speed ratio is negative. This results in a decrease in degree of torque acting on the speed variator such as a continuously variable transmission, thus permitting a required degree of durability of the speed variator to be reduced.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: January 17, 2017
    Assignees: NIPPON SOKEN, INC., DENSO CORPORATION
    Inventors: Koji Kawasaki, Takenori Matsue
  • Patent number: 9546653
    Abstract: An electromagnetic body has a movable core reciprocatably movable within a movable core chamber. The movable core has through holes and a fitting hole that pass through the movable core in a direction of movement of the movable core. A stator core facing the movable core defines the movable core chamber together with the electromagnetic body. A valve stem is fixed into the fitting hole and has a fluid chamber recessed from a first end surface facing the stator core. Air bubbles generated in a gap can be guided into the fluid chamber and collapse by flow of the fuel flowing into the fluid chamber from the through holes through the gap.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: January 17, 2017
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Yasuhiro Sawada, Yutaka Miyamoto, Shinichiro Koshimoto
  • Patent number: 9534589
    Abstract: Between a movable core chamber and a fuel supply passage, a needle guide slidably supports a needle fixed to a movable core. The needle guide has a communication hole which fluidly connects the movable core chamber and the fuel supply passage. An opening sectional area of the communication hole is defined in such a manner that a fuel discharged amount decreases as an energization start time of a coil is delayed. In a suction stroke, it is restricted that the movable core and the needle bounce toward the fixed core after the needle biases a suction valve toward a stopper by means of a biasing force of a second spring. A relationship between the energization start time of the coil and the fuel discharged amount is properly maintained, so that the fuel discharged amount of the high-pressure pump can be controlled correctly.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: January 3, 2017
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Shinobu Oikawa, Hirokuni Tomita, Takehiko Kato
  • Patent number: 9528401
    Abstract: A planet bearing has a single row of spherical rolling elements between an outer wheel and an inner wheel. A planet gear is supported by the outer wheel from a radially inner side. A planet carrier supports the inner wheel from a radially inner side. An elastic component is interposed between the inner wheel and the planet carrier. A driving rotor or a driven rotor has a thrust bearing part that supports the planet gear from one side in the axial direction. The outer wheel is in contact with the spherical rolling element at a rolling contact point and defines a contact angle on the one side in the axial direction.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: December 27, 2016
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Makoto Otsubo, Taei Sugiura, Hiroki Takahashi
  • Patent number: 9523541
    Abstract: A cooling fin structure used in a cooler for an electric device includes a plurality of pin fins (71) arranged in a zigzag form in a coolant passage (80). Each of the pin fins (71) has a circular portion (72) having a circular cross-section, and irregularly shaped portions (73) provided contiguously on the upstream and downstream sides of the circular portion (72) as viewed in a direction of flow of the coolant. The irregularly shaped portions (73) have an outer peripheral surface (75) that is formed along a circumference (130) having a center at a center point (101) of the circular portion (72) of a pin fin (71, 71B) that is located adjacent to the pin fin (71, 71A) having the irregularly shaped portions (73), in an oblique direction relative to the direction of flow of the coolant.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: December 20, 2016
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON SOKEN, INC.
    Inventors: Masanori Kawaura, Hirohito Matsui, Tadafumi Yoshida
  • Patent number: 9518543
    Abstract: A fuel supply system for an internal combustion engine includes a heat exchanger that has a heat exchanging wall between a liquefied fuel passage and an engine coolant passage. Heated and vaporized fuel flowing out from the liquefied fuel passage of the heat exchanger is supplied to the internal combustion engine. A flow rate of liquefied fuel supplied to the liquefied fuel passage of the heat exchanger is set. A flow rate of engine coolant supplied to the engine coolant passage of the heat exchanger is determined on the basis of a temperature of the engine coolant supplied to the engine coolant passage of the heat exchanger such that nucleate boiling or transition boiling of the liquefied fuel in the set flow rate occurs near a boundary between nucleate boiling and transition boiling in the liquefied fuel passage.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: December 13, 2016
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON SOKEN, INC., AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Hideaki Kosuge, Susumu Kojima, Rio Shimizu, Tomojiro Sugimoto, Masayuki Akita, Jin Tanaka, Makoto Nakagawa, Masaki Ikeya
  • Patent number: 9499156
    Abstract: An on-board apparatus includes a measuring unit, a filtering unit, a predicting unit, an executing unit, a detecting unit, and an adjusting unit. The measuring unit periodically measures a state of an own vehicle. The filtering unit performs a low-pass filter process on measurement results from the measuring unit. The predicting unit predicts behavior of the own vehicle based on the measurement results on which the low-pass filter process has been performed. The executing unit performs processes based on the behavior of the own vehicle predicted by the predicting unit. The detecting unit detects a traveling environment of the own vehicle. The adjusting unit adjusts a time constant for the low-pass filter process based on the traveling environment detected by the detecting unit.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: November 22, 2016
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Taku Sakima, Yoshihisa Ogata
  • Publication number: 20160293368
    Abstract: A relay apparatus incorporates at least first and second relays having respective first and second electromagnetic coils, with a single yoke partially surrounding each of the coils. When current is passed through only the first electromagnetic coil, to activate the first relay, resultant magnetic flux acting on the armature of the second relay is attenuated by passing a current through the second electromagnetic coil to produce opposing-direction magnetic flux. When current is passed in the opposite direction through the second coil, to activate the second relay, the magnetic fluxes produced by the first and second electromagnetic coils become mutually reinforced, thereby reducing the power consumption required to activate both of the relays and to maintain that activated state.
    Type: Application
    Filed: March 31, 2016
    Publication date: October 6, 2016
    Applicants: NIPPON SOKEN, INC., DENSO CORPORATION, ANDEN CO., LTD.
    Inventors: Ken TANAKA, Shota IGUCHI
  • Publication number: 20160293365
    Abstract: A relay system includes a plurality of relays that is provided between a power supply unit supplying electric power and a load acting by receiving the electric power supplied from the power supply unit to switch between conduction and interruption of the electric power supplied from the power supply unit to the load, each of the relays having an exciting coil, a control unit that controls switching between application of current to the exciting coils and interruption of the current, first switches that separately excite the exciting coils, and a second switch that is connected between the exciting coils. The control unit controls turning on and off the first switches and the second switch to switch the exciting coils between parallel connection and series connection.
    Type: Application
    Filed: March 31, 2016
    Publication date: October 6, 2016
    Applicants: NIPPON SOKEN, INC., ANDEN CO., LTD.
    Inventors: Ken TANAKA, Shota IGUCHI
  • Publication number: 20160294222
    Abstract: An electric power receiving device has an electric power receiving unit that contactlessly receives electric power from an electric power transmission device, and the power receiving unit includes a first node, a second node, and a capacitor, a coil, a capacitor, a coil, and a capacitor, which are sequentially connected in series, between the first node and the second node.
    Type: Application
    Filed: March 30, 2016
    Publication date: October 6, 2016
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON SOKEN, INC.
    Inventors: Hiroaki YUASA, Ryohei NISHIZAKI, Norihito KIMURA
  • Patent number: 9447792
    Abstract: A centrifugal blower provided with a spiral shaped scroll chamber where a bottom part of the scroll chamber gradually expands downward in the axial direction of the fan well along with expansion of the spiral and where a flow area gradually expands toward an air outlet from a spiral start part of the casing, the centrifugal blower having an initial slant angle ?0 at the spiral start part of the bottom part of the scroll chamber of a range of angle of 5.2° to 27.5° or setting a backflow prevention rib at the fan outlet.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: September 20, 2016
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Yasushi Mitsuishi, Masaharu Sakai, Masanori Yasuda, Shouichi Imahigashi, Syunsuke Ishiguro
  • Patent number: 9444112
    Abstract: In a fuel cell monitoring device, a gas-diffusion resistance calculation section calculates a gas-diffusion resistance Rtotal indicating a difficulty of diffusing reaction gas to a catalyst layer in a fuel cell based on a gas reaction resistance Rct calculated by a resistance calculation section. A second diffusion resistance calculation section calculates a second diffusion resistance Rdry varying depending on a dried-up in the fuel cell based on a proton transfer resistance Rmem calculated by the resistance calculation section. A first diffusion resistance calculation section calculates a first diffusion resistance Rwet varying depending on a flooding in the fuel cell by subtracting the second diffusion resistance Rdry from the gas-diffusion resistance Rtotal. A water content calculation section calculates a water content of the fuel cell based on the first diffusion resistance. A recovery control section adjusts the water content in the fuel cell based on the calculated water content.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: September 13, 2016
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji Ishikawa, Ikuyasu Kato, Takashi Yamada, Yuichi Sakajo, Keigo Suematsu
  • Patent number: 9444246
    Abstract: In a power converter, a driver that drives, according to a control signal, a switching element of a switch circuit for converting input power to output power. The control signal represents how to drive the switching element. A controller outputs the control signal to the driver for controlling the driver. A measuring unit measures a value of input power input to the switch circuit. A protection determining unit determines, based on the measured value of the input power, whether there is a need to protect the power converter. The protection determining unit outputs a stop control signal to at least one of the driver and the controller based on a result of the determination of whether there is a need to protect the power converter. The stop control signal represents whether to forcibly stop drive of the switching element.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: September 13, 2016
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Kimikazu Nakamura, Yuji Hayashi
  • Patent number: 9444229
    Abstract: A spark plug for an internal combustion engine includes a ground electrode, an insulator held inside the ground electrode, and a center electrode held inside the insulator. When a segment of a line extending in a plug radial direction to connect an arbitrary start point on a surface of the ground electrode and an outer peripheral surface of the insulator is a line segment H, a point of intersection between the line segment H and the outer peripheral surface of the insulator is an intersection point K, a length of the line segment H is L1, and an axial distance between the intersection point K and the distal end of the insulator is L2, the ground electrode is provided on the surface thereof with a shortest discharge forming portion as the start point along a plug circumferential direction at which a value of (L1+L2) becomes minimum.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: September 13, 2016
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Shota Kinoshita, Shinichi Okabe, Akitmitsu Sugiura