Patents Assigned to Keihin Corporation
  • Patent number: 10877102
    Abstract: A voltage detection device is provided which includes: a plurality of wires that are connected to a plurality of battery cells of a battery; a voltage detection circuit that operates with supply of electric power from the battery and detects voltages of the plurality of battery cells via the plurality of wires; an overvoltage protection circuit that electrically connects one or more wires of the plurality of wires to a minus terminal of the battery when the voltage of the one or more wires is higher than a predetermined threshold value; and a breaker circuit that irreversibly breaks electrical connection between the minus terminal and the voltage detection circuit using a current flowing from the one or more wires to the minus terminal.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: December 29, 2020
    Assignee: KEIHIN CORPORATION
    Inventors: Shingo Tsuchiya, Seiji Kamata, Atsushi Hirokawa, Seigo Imai
  • Patent number: 10877078
    Abstract: A voltage determination device includes: a printed wiring board on which first to third substrate terminals are arranged in substantially one line; first and second voltage determination circuits mounted on the printed wiring board and disposed on a first side of the printed wiring board divided by a line passing through the first to third substrate terminals; a first printed wiring connecting the first substrate terminal and the first voltage determination circuit; a second printed wiring connecting the second substrate terminal and the first voltage determination circuit; a third printed wiring connecting the third substrate terminal and the second voltage determination circuit; and a fourth printed wiring connecting the second substrate terminal and the second voltage determination circuit, in which the first to fourth printed wirings are provided without intersecting each other and without bypassing a second side of the printed wiring board divided by the first arrangement line.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: December 29, 2020
    Assignee: KEIHIN CORPORATION
    Inventor: Yuzuru Takashima
  • Patent number: 10865900
    Abstract: The present invention provides an inexpensive valve unit fixing structure that enables a valve unit to be easily fixed without the need for unitization in advance, and a fluid pump that enables a discharge valve and a relief valve to be incorporated in a compact manner. The valve unit fixing structure includes a main body (3), a discharge communication passage (9) provided inside the main body (3), a discharge valve unit (10) which is provided in the main body (3) and which opens/closes the discharge communication passage (9), and deformed fixing parts (35) which are formed by plastically deforming the main body (3) and which fix the discharge valve unit (10) to the main body (3).
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: December 15, 2020
    Assignee: Keihin Corporation
    Inventors: Yohei Kaneko, Yuya Ogane
  • Patent number: 10845420
    Abstract: A voltage detecting apparatus includes: a voltage detecting unit configured to detect a voltage of a battery supplying power to a load; a discharge circuit configured to discharge the battery; a protection circuit disposed between the voltage detecting unit and the battery and between the discharge circuit and the battery; and a determination unit configured to estimate an internal resistance of the protection circuit on the basis of a first voltage detected by the voltage detecting unit when the discharge circuit is in a non-operating state and a second voltage detected by the voltage detecting unit when the discharge circuit is in an operating state and determine a half-cut state of the protection circuit on the basis of a result of the estimation.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: November 24, 2020
    Assignee: KEIHIN CORPORATION
    Inventor: Seiji Kamata
  • Patent number: 10801494
    Abstract: A hydraulic control apparatus is provided including: an electromagnetic valve that has an input port communicating with a supply destination unit of oil and a control port that is switched between communication and disconnection by resultant force of a hydraulic pressure of the supply destination unit and electromagnetic force; a variable displacement pump which has a suction port communicating with a supply source of the oil, an ejection port communicating with the supply destination unit, and a control chamber communicating with the control port and rotates in accordance with drive of the supply destination unit, in which an amount of the oil ejected to the supply destination unit through the ejection port changes in accordance with a pressure in the control chamber; and a control unit that controls a value of a necessary current that is caused to flow through the electromagnetic valve.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: October 13, 2020
    Assignees: YAMADA MANUFACTURING CO., LTD., KEIHIN CORPORATION
    Inventors: Yuji Senbongi, Kenichi Fujiki, Toru Kobayashi, Ken Kaneko, Takahiro Satou, Haruyo Kobayashi, Yoshiharu Segawa, Naoki Oikawa, Syu Murayama, Kentaro Yamanaka, Yuhki Jyo
  • Patent number: 10791650
    Abstract: A cooling device includes a heat receiver that receives heat of an electronic component via a coolant, a heat discharger that discharges heat of the coolant from the heat receiver, and a circulation flow path through which the coolant flows from the heat receiver to the heat discharger and the coolant flows from the heat discharger to the heat receiver. The heat receiver is provided with an attachment surface to which a plurality of the electronic components are attached, a first flow path that communicates with the circulation flow path, and a plurality of surface area increasing members that communicate with the first flow path and that are provided on a rear surface of the attachment surface corresponding to the plurality of electronic components.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: September 29, 2020
    Assignees: KEIHIN CORPORATION, TOHOKU UNIVERSITY
    Inventors: Hajime Tsukui, Yusuke Nishimura, Takuya Ouchi, Shigenao Maruyama, Atsuki Komiya, Junnosuke Okajima
  • Patent number: 10741817
    Abstract: A battery connection module is adapted to connect a battery pack, the battery connection module comprises: a carrying tray; a plurality of busbars mounted on the carrying tray and adapted to electrically connect a plurality of batteries of the battery pack; a flexible circuit board mounted on the carrying tray and mechanically and electrically connected to the plurality of busbars, the flexible circuit board having a frame-shaped portion with an opening, a flexible mating portion being provided in the opening of the frame-shaped portion; and a battery management system mounted on the carrying tray, positioned above the flexible circuit board and comprising a flexible circuit board connector; the flexible mating portion extending into the opening and being reversely bent and mated with the flexible circuit board connector on the battery management system. These components are integrated to an integrated module that facilitates subsequent assembling and use.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: August 11, 2020
    Assignees: Molex, LLC, Keihin Corporation
    Inventors: Siow-Pheng Goh, Kian Heng Lim, Shingo Tsuchiya, Seiji Kamata
  • Patent number: 10731572
    Abstract: The intake control apparatus (1) includes a body (4) which integrally includes intake pipes (2a) and (2b). The body (4) includes a linear bypass passage (10a), which passes through thereinside, one end of which opens upstream of a valve body (5) of the intake pipe (2a), and the other end of which opens downstream of the valve body (5) of the intake pipe (2b).
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: August 4, 2020
    Assignee: Keihin Corporation
    Inventors: Masaki Yamase, Daisuke Shiraida
  • Patent number: 10715069
    Abstract: A discharge control device performs discharging of a capacitor, in a state in which a battery is not connected to an inverter that drives a motor, by causing electric charges accumulated in the capacitor connected to the inverter to be consumed by windings of the motor. The discharge control device performs the discharging of the capacitor by sequentially generating command values for voltages applied to a ? axis and a ? axis while causing a voltage phase in an ?? stationary coordinate system having a rotation axis of a rotor of the motor as an origin and defined by the ? axis and the ? axis orthogonal to each other to be inverted in a predefined period.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: July 14, 2020
    Assignee: KEIHIN CORPORATION
    Inventor: Nobukatsu Yamaguchi
  • Patent number: 10655636
    Abstract: A centrifugal air blower includes a lower case. The lower case includes a land part near a tongue part joining a discharge passage of a passage section and a spiral start position of a spiral passage. The land part protrudes toward an upper case. The height position of the land part is substantially the same as the height position of lower ends of blades. The land part includes a first wall which is vertically formed along an inner circumferential wall of the discharge passage, a second wall which is vertically formed on an outer circumferential side of an insertion hole and on a radially inward side of the first wall, and a ceiling covering upper ends of the first and second walls.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: May 19, 2020
    Assignee: KEIHIN CORPORATION
    Inventor: Masaatsu Iwasaki
  • Patent number: 10630136
    Abstract: An air-conditioning blower motor unit includes a brushless motor that is controlled by electronic parts arranged on a circuit board. A rotation shaft of the brushless motor that rotates a blower fan is rotatably held by bearing holders. The bearing holders and the circuit board are held by a support disk without overlapping each other. The support disk is held by the bearing holders via a vibration absorber.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: April 21, 2020
    Assignee: KEIHIN CORPORATION
    Inventor: Masaaki Ishizaki
  • Patent number: 10608535
    Abstract: A control device for a step-up converter which controls the step-up converter connected between a load and a DC power source, the control device includes a voltage control unit, a current command generation unit, a duty estimator, and a pole zero cancellation control unit. The voltage control unit performs a control arithmetic operation on the basis of a calculated value, obtained by performing a proportional arithmetic operation and an integration arithmetic operation on a difference between a voltage value on the load side and a voltage command value, and a value generated by the pole zero cancellation control unit. The current command generation unit generates a reactor current command value on the basis of an arithmetic result of the voltage control unit and a reciprocal of a duty estimation value.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: March 31, 2020
    Assignee: KEIHIN CORPORATION
    Inventor: Takami Suzuki
  • Patent number: 10567193
    Abstract: An in-vehicle control device connected to an in-vehicle LAN system conforming to a CAN protocol, when an output signal output from a second controller maintains a dominant level for a predetermined time, determines that there is an abnormality in the output signal output from the second controller, and converts the output signal output to a selection section from the second controller into a signal of a recessive level.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: February 18, 2020
    Assignee: KEIHIN CORPORATION
    Inventors: Yuta Nakamura, Yuzuru Takashima
  • Patent number: 10563660
    Abstract: A support plate is accommodated in the interior of a casing, the support plate having a bearing member that rotatably supports a rotating shaft of a brushless motor, together with supporting a circuit substrate on which a control circuit is provided. The casing is constituted by combining a lower side half body and an upper side half body. A second flow passage through which cooling air (air) is allowed to flow is formed in the lower side half body, and a protrusion is provided therein, which serves as a guide member for guiding the cooling air toward the side of (a first flow passage of) the upper side half body.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: February 18, 2020
    Assignee: KEIHIN CORPORATION
    Inventors: Masaaki Ishizaki, Masashi Ueda
  • Publication number: 20200048070
    Abstract: A pressure reducing valve for gas is provided in which a connecting passage providing a connection between a passage and a pressure action chamber is formed within a valve body, a guide hole guiding movement of the valve body between a spring chamber and a high pressure chamber is formed within a body, a spring linked to a piston and urging the valve body in an opening direction is provided within the spring chamber, and a seal member providing a seal between the high pressure chamber and the spring chamber is disposed between the guide hole and the valve body. This provides a pressure reducing valve for gas that can suppress problems based on a decrease in the temperature of a pressure reducing valve.
    Type: Application
    Filed: July 12, 2017
    Publication date: February 13, 2020
    Applicant: Keihin Corporation
    Inventors: Masayuki SUZUKI, Shigeto RYUEN
  • Patent number: 10544729
    Abstract: A valve control device controls a valve drive mechanism on the basis of a degree-of-opening signal for a valve and a startup signal for an engine, and includes: a drive signal generating unit that, when it is determined on the basis of the startup signal that the engine is stated, generates a test drive signal for test-driving the valve before the generation of a normal drive signal associated with normal driving of the valve; and an abnormality determining unit that, on the basis of the degree-of-opening signal during the test driving, determines whether or not an abnormality has occurred in the drive mechanism. The drive signal generating unit stops generating the test drive signal and the normal drive signal when the abnormality determining unit determines that the abnormality has occurred in the drive mechanism.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: January 28, 2020
    Assignees: KEIHIN CORPORATION, HONDA MOTOR CO., LTD.
    Inventors: Sachio Hojo, Youichiro Shikine, Tetsuo Yamashita, Shigeki Yoshitake, Kensuke Yamamoto, Akihito Inoue
  • Publication number: 20200001679
    Abstract: A door actuating device includes a plurality of doors disposed in a flow channel for adjusting a degree of opening of the flow channel defined in an air conditioner case, the doors having respective door drive shafts, and a link unit actuating at least two of the doors. The link unit includes an actuator, a plate-like base member having two surfaces, a link mechanism having a plurality of levers mounted on at least either one of the two surfaces of the base member, and a rack member movably disposed on the base member and movable by a drive force transmitted from the actuator.
    Type: Application
    Filed: June 18, 2019
    Publication date: January 2, 2020
    Applicant: Keihin Corporation
    Inventor: Shingo Akiyama
  • Patent number: 10480428
    Abstract: A valve control device performs feedback control of a drive mechanism for a wastegate valve provided for a supercharger of an engine on the basis of a sensor signal indicating a real degree of opening of the wastegate valve and a target degree of opening of the wastegate valve, and includes a gain setting unit configured to set different control gains when the wastegate valve is closed and when the wastegate valve is opened.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: November 19, 2019
    Assignees: KEIHIN CORPORATION, HONDA MOTOR CO., LTD.
    Inventors: Sachio Hojo, Masatomo Yoshida, Youichiro Shikine, Kensuke Yamamoto, Akihito Inoue
  • Patent number: 10476346
    Abstract: A stator of a brushless motor is provided with stator side terminal portions. A circuit board is provided with board side terminal portions. The stator side terminal portions are connected to adjacent two of U phase electromagnetic coils, V phase electromagnetic coils and W phase electromagnetic coils. The stator side terminal portions and the board side terminal portions are electrically connected via flexible wires.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: November 12, 2019
    Assignee: KEIHIN CORPORATION
    Inventor: Masashi Ueda
  • Patent number: 10461657
    Abstract: A power conversion device includes a first cooler configured to cool a power module, a second cooler configured to cool at least one electronic component, and a housing configured to house the first cooler and the second cooler. The power conversion device also includes a connecting coolant passage formed in an inner wall of the housing such that the connecting coolant passage connects the first cooler to the second cooler. The power conversion device can have the connecting coolant passage formed in the housing, without enlarging a size of the housing. The strength of a side wall of the housing is enhanced because the connecting coolant passage is formed in the inner wall of the housing.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: October 29, 2019
    Assignee: KEIHIN CORPORATION
    Inventors: Kazuki Nakamura, Kenichi Sasaki