Patents Assigned to Keihin Corporation
  • Patent number: 9752527
    Abstract: A fuel injection device includes: a current control section which turns off a current which is applied by a current output section such that a timing at which fuel injection of a fuel injection section is ended becomes a timing coinciding with a timing at which fuel injection is ended in a case where a current is turned off from a predetermined current amount at which continuation of the fuel injection of the fuel injection section becomes possible, in a case where a fuel injection ending request timing of the fuel injection section is in a time domain in which a current which is applied by the current output section changes transiently.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: September 5, 2017
    Assignee: KEIHIN CORPORATION
    Inventor: Takayuki Shimatsu
  • Publication number: 20170244259
    Abstract: A voltage detecting device includes a plurality of batteries, a plurality of filters each including a resistor and a capacitor, a plurality of discharge circuits each including a resistor, a switch, and a capacitor connected in parallel to the switch, a first voltage detecting circuit that includes a first filter among the plurality of filters and a first discharge circuit among the plurality of discharge circuits and detects voltage of a first battery among the plurality of batteries, a second voltage detecting circuit that includes a second filter among the plurality of filters and a second discharge circuit among the plurality of discharge circuits and detects voltage of a second battery among the plurality of batteries, and a detecting unit that controls the switch and detects disconnection between the battery and the discharge circuit based on outputs of the first and second voltage detecting circuits.
    Type: Application
    Filed: January 26, 2017
    Publication date: August 24, 2017
    Applicant: KEIHIN CORPORATION
    Inventors: Shingo Tsuchiya, Seiji Kamata
  • Publication number: 20170234918
    Abstract: A ground fault detecting device includes a signal generating unit that generates a signal for ground fault detection, a signal supply unit that supplies the signal for ground fault detection to an object of ground fault detection a signal processing unit that executes signal processing of a detection-target signal including at least the signal for ground fault detection obtained from the object of ground fault detection a signal separating unit that extracts the signal for ground fault detection from an output signal of the signal processing unit, and a ground fault detecting unit that detects occurrence of a ground fault in the object of ground fault detection based on the signal for ground fault detection output from the signal separating unit. The signal supply unit and the signal separating unit are configured by passive elements. The signal generating unit and the signal processing unit are configured as active circuits.
    Type: Application
    Filed: November 28, 2016
    Publication date: August 17, 2017
    Applicant: Keihin Corporation
    Inventors: Shingo Tsuchiya, Seiji Kamata, Takashi Ikeda
  • Patent number: 9707619
    Abstract: A squeeze pin circuit is installed to a direction switching valve. The direction switching valve is configured to switch a direction of hydraulic pressure to a core cylinder. The squeeze pin circuit is configured to drive a squeeze pin. The squeeze pin is configured to partially pressurize molten metal filled in a cavity. The squeeze pin circuit includes a squeeze pin cylinder and a flow rate adjusting unit. The squeeze pin cylinder is coupled to the direction switching valve to drive the squeeze pin. The flow rate adjusting unit is installed on a hydraulic pressure path. The hydraulic pressure path couples the direction switching valve to a head side of the squeeze pin cylinder. The flow rate adjusting unit is configured to ensure pressure compensation and temperature compensation.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: July 18, 2017
    Assignee: KEIHIN CORPORATION
    Inventors: Norihiro Iwamoto, Fumihiro Sakuma, Tetsuya Uehara
  • Patent number: 9713260
    Abstract: An electronic circuit device which forms a parting line preventing the penetration of moisture into a connector and a manufacturing method thereof are provided. The electronic, circuit device (1) includes resin sealing members (6, 7) that seal a circuit substrate (2) having electronic components (4) mounted and a terminal section (5) formed at one end portion. The resin sealing member (6) includes a parting line (9) formed extending around an axis of an insertion direction of the terminal section (5). The electronic circuit device (1) is manufactured using a metal mold apparatus (21) formed by an upper die (22) including a first hollow portion (24) having a shape following the external appearance of a half part (6) of the resin sealing member and a lower die (23) including a second hollow portion (27) having a shape following the external appearance of a half part (7) of the resin sealing member.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: July 18, 2017
    Assignee: Keihin Corporation
    Inventors: Tadao Kuboki, Satoshi Sakai
  • Patent number: 9702787
    Abstract: An in-cylinder pressure detecting apparatus for an internal combustion engine, for detecting an in-cylinder pressure which is a pressure in a combustion chamber of the engine. The in-cylinder pressure is detected by an in-cylinder pressure detecting block, and a motoring pressure corresponding to an in-cylinder pressure when no combustion is performed in the combustion chamber, is estimated. A peak value of the detected in-cylinder pressure is obtained as a detected pressure peak value in a predetermined operating condition of the engine. An estimated motoring pressure peak value which is a peak value of the estimated motoring pressure and corresponds to the detected pressure peak value, is calculated. The detected pressure peak value is compared with the estimated motoring pressure peak value, and sensitivity correction of the in-cylinder pressure detecting block is performed based on a result of the comparison.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: July 11, 2017
    Assignees: HONDA MOTOR CO., LTD., KEIHIN CORPORATION
    Inventors: Shusuke Akazaki, Shunichi Saito
  • Patent number: 9702684
    Abstract: Provided is a rotation angle detection device, having a magnet installed on a valve shaft, which magnetically detects a rotation angle of a valve shaft, the device being configured to include a plate member having a predetermined thickness which is fastened and fixed to one end of the valve shaft, wherein the magnet is molded to the plate member into a cylindrical shape having a height larger than the predetermined thickness.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: July 11, 2017
    Assignee: KEIHIN CORPORATION
    Inventors: Kiyoshi Kaneko, Michio Onuma, Ryuichi Yaegashi
  • Patent number: 9695791
    Abstract: A fuel supply device for an engine is provided in which a throttle body is provided with an electrically operated fuel pump, wherein a base member integrally having a base portion that extends in the vertical direction on one side of the throttle body and a housing tube portion that is formed into a bottomed tube shape having an end wall communicating with the base portion is linked integrally to a body, a pump housing case that forms a fuel storage chamber is formed from the housing tube portion and a bottomed tubular housing cover joined to the housing tube portion via a seal member and is disposed beneath the body, and a vapor discharge path for discharging vapor generated in a fuel storage chamber is formed in the base portion so as to extend in the vertical direction and communicate with the fuel storage chamber.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: July 4, 2017
    Assignee: Keihin Corporation
    Inventors: Motoki Akimoto, Kuniaki Takahashi, Tatsuya Miura, Satoshi Tanaka
  • Patent number: 9693476
    Abstract: A power conversion apparatus has a configuration in which plate-like bus-bars are laminated via an insulating material to define a pair of bus-bars. A laminated bus-bar, in which the pair of bus-bars is disposed vertically so that a width direction thereof is in a vertical direction, includes a pair of voltage measuring terminals that is correspondingly branched from a part of the pair of bus-bars to extend toward a circuit board. The pair of voltage measuring terminals is arranged symmetrically with respect to the pair of bus-bars to extend upward toward the circuit board, while extending in an intersecting direction intersecting with the pair of bus-bars, to be electrically connected to the circuit board.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: June 27, 2017
    Assignee: KEIHIN CORPORATION
    Inventors: Kazuya Nagasawa, Hiroaki Iida, Morifumi Shigemasa, Yasuhiro Maeda, Masami Ogura, Hitoshi Nishio
  • Patent number: 9689362
    Abstract: A fuel injection valve equipped with an in-cylinder pressure sensor is provided, in which the fuel injection valve is fitted into an injection valve mounting hole provided in an engine, the in-cylinder pressure sensor is attached to a valve housing part of the fuel injection valve, the in-cylinder pressure sensor having a front end facing the combustion chamber and detecting a pressure of the combustion chamber, and a signal transmission device is connected to the in-cylinder pressure sensor, the signal transmission device transmitting an output signal thereof to an outside. The signal transmission device is disposed on the valve housing part and covered together with a part of the valve housing part by an insulating layer. In such arrangement, the signal transmission device is protected by the insulating layer, and a contact between the signal transmission device and an inner face of the injection valve mounting hole is prevented.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: June 27, 2017
    Assignee: Keihin Corporation
    Inventors: Gaku Sato, Yuki Kojima, Nakaya Nakamura
  • Patent number: 9673641
    Abstract: A voltage detecting device includes a plurality of voltage detecting circuits provided for battery modules of a battery, the battery being formed by connecting, in series with each other, the battery modules each formed by connecting battery cells in series with each other, the plurality of voltage detecting circuits being configured to detect voltage of each of the battery cells; a plurality of voltage detecting lines connecting the battery cells to the voltage detecting circuits; and a control device controlling charge and discharge of the battery cells on a basis of detection information obtained from the voltage detecting circuits, a voltage detecting line having a lowest potential being connected to one of the voltage detecting circuits and a voltage detecting line having a highest potential being connected to the other of the voltage detecting circuits, being adjacent and connected to each other via a first capacitor.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: June 6, 2017
    Assignee: KEIHIN CORPORATION
    Inventor: Kazuya Miyajima
  • Patent number: 9657661
    Abstract: An engine control system is a system configured to selectively switch between first fuel and second fuel and perform an operation control of a single engine, including: a sensor configured to detect an oxygen concentration of an exhaust gas that is exhausted from the engine; and a control device configured to perform an air-fuel ratio feedback control such that an air-fuel ratio becomes a target air-fuel ratio based on an output signal of the sensor, wherein the control device calculates a correction coefficient of an air-fuel ratio feedback control during an operation with the second fuel, and further stores a fuel composition correction coefficient that is a value in a predetermined range and corrects a difference between the calculated correction coefficient and a targeted correction coefficient arising from a change in composition of the second fuel.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: May 23, 2017
    Assignee: KEIHIN CORPORATION
    Inventors: Takashi Hibira, Shinji Yokoyama, Masaya Ootsuka, Makoto Haruta, Noriaki Sumisya
  • Patent number: 9638134
    Abstract: A carburetor comprises a rotation-typed control valve which opens or closes a second bleed air passage according to an opening degree of the throttle valve. The control valve includes an upper end portion of a valve stem, and in a projection plane orthogonal to an axis of an aspirating channel, a first bleed air passage is arranged on one side of the valve stem, an upstream-side passage portion starting from the control valve of the second bleed air passage is arranged on an upper side of the aspirating channel, a downstream-side passage portion starting from the control valve of the second bleed air passage is arranged on the one side of the valve stem, and a downstream end of the downstream-side passage portion is connected to a midway portion of the first bleed air passage.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: May 2, 2017
    Assignee: KEIHIN CORPORATION
    Inventors: Kazuki Kaneda, Koji Matsuno
  • Patent number: 9634500
    Abstract: The storage battery system includes a storage battery comprising a plurality of battery modules; a plurality of voltage monitoring circuits for monitoring a voltage of the battery module; and a control device that controls charging and discharging of the storage battery on the basis of monitoring information that is obtained by carrying out communication with the voltage monitoring circuits, wherein the control device comprises a determination unit that calculates an estimated output voltage of the storage battery by using the monitoring information that is obtained from any one of the voltage monitoring circuits before occurrence of a communication failure in a case where the communication failure with any one of the voltage monitoring circuits occurs, and compares the estimated output voltage and an output voltage of the storage battery after occurrence of the communication failure to determine an abnormal site of the communication failure.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: April 25, 2017
    Assignee: KEIHIN CORPORATION
    Inventors: Seiji Kamata, Satomu Sasaki
  • Patent number: 9624960
    Abstract: A first member having a first lock groove and a second member having a connection hole for insertion of the first member and a second lock groove opened to an inner periphery of the hole, are connected via a lock ring having a circular section and engaging with the grooves. An outer diameter of the ring under a load-free condition is set not less than a diameter of a groove bottom surface of the second lock groove. A reduced-diameter guide hole portion for guiding the ring to the second lock groove while reducing a diameter of the ring, is adjacently disposed short of the second lock groove in an insertion direction of the first member. A depth from an inner peripheral surface of the guide hole portion to a groove bottom surface of the second lock groove is set less than a radius of the circular section of the ring.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: April 18, 2017
    Assignee: Keihin Corporation
    Inventor: Kei Ishihara
  • Patent number: 9616729
    Abstract: In an air conditioner casing of a vehicular air conditioner, an evaporator is arranged in a cold air passage, and a heater core is arranged in a warm air passage downstream from the cold air passage. A first air mixing damper is disposed in a warm air opening between the cold air passage and the warm air passage, and a second air mixing damper disposed in a cold air opening between the cold air passage and a bypass passage. Switching from a cooling mode to a heating mode, the first air mixing damper is opened at a constant speed proportional to the driving angle of a drive unit, and the second air mixing damper is initially rotated at a high speed by a predetermined angle immediately after the start of the closing operation, and thereafter is rotated at a low speed.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: April 11, 2017
    Assignee: KEIHIN CORPORATION
    Inventors: Shinya Chiba, Minoru Kitagawa
  • Publication number: 20170072771
    Abstract: An automobile air conditioner allows two types of heating devices for air heating (a heater core 14 and a PTC heater 15) to be selectively mounted therein. A housing 2 of a HVAC unit 1 defines therein an air feed passage 3. Either of the heater core 14 and the PTC heater 15 is selectively mounted in the housing 2 through an insertion/ejection slot 32, which formed in a side surface the housing 2. The insertion/ejection slot 32 is formed so as to fit the heater core 14. The PTC heater 15 is housed in a frame 33 having an external dimension to fit into the insertion/ejection slot 32, and mounted in the housing 2 with the frame 33 interposed therebetween. The frame 33 has temperature sensor holders 34.
    Type: Application
    Filed: February 6, 2015
    Publication date: March 16, 2017
    Applicants: Sanden Holdings Corporation, Keihin Corporation
    Inventors: Masao WATANABE, Takahiro SETO
  • Patent number: 9593738
    Abstract: An active vibration isolation device includes: a housing fixed to a vibration isolation target; a movable shaft elastically supported by the housing displaceably in an axial direction; a yoke having an umbrella-shaped part provided consecutively and coaxially with the movable shaft and a circular cylindrical part provided consecutively with an outer circumference of the umbrella-shaped part and coaxially with the movable shaft; a ring-shaped coil fixed between the movable shaft and the cylindrical part; and first and second permanent magnets in a ring shape attached to the yoke. The first permanent magnet is smaller in diameter than the coil and is disposed inside the coil in a radial direction of the coil. The second permanent magnet is larger in diameter than the coil and is disposed outside the coil in the radial direction so that part thereof is made to face an inside of the yoke.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: March 14, 2017
    Assignee: KEIHIN CORPORATION
    Inventor: Yuji Ito
  • Patent number: 9587612
    Abstract: An in-cylinder pressure detecting device of a direct injection type internal combustion engine is provided in which a ring-shaped pressure detection element (34) surrounding a fuel injection hole (33b) is provided in the vicinity of an extremity of an injector (20) that injects fuel into a combustion chamber. Since the pressure detection element is provided on the injector, not only is it unnecessary to change the shape or structure of the cylinder head or the combustion chamber in order to provide the pressure detection element, but it is also possible to cool the pressure detection element (34) by fuel passing through the inside of the injector to thus enhance the precision of pressure detection and the durability.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: March 7, 2017
    Assignees: HONDA MOTOR CO., LTD., KEIHIN CORPORATION
    Inventors: Shusuke Akazaki, Yuji Yamamoto, Toshitaka Hachiro, Gaku Sato
  • Patent number: 9583958
    Abstract: A voltage detecting device includes a voltage detecting circuit configured to detect voltages of a plurality of battery cells constituting a battery; a plurality of voltage detecting lines connecting the respective battery cells to the voltage detecting circuit; discharging circuits connecting the respective voltage detecting lines to a ground, and discharging the battery cells in an overcharged state; a power adjusting section adjusting power of the battery, and supplying the voltage detecting circuit with the adjusted power as driving power; the voltage detecting circuit detecting the voltages of the respective battery cells via the voltage detecting lines; and an overvoltage protecting circuit protecting the voltage detecting circuit from voltage equal to or higher than a predetermined threshold value, the voltage being generated in the voltage detecting lines, the discharging circuits, and the power adjusting section.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: February 28, 2017
    Assignee: KEIHIN CORPORATION
    Inventor: Kazuya Miyajima