Patents by Inventor Hiroshi Tamura

Hiroshi Tamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11027815
    Abstract: A navigation method for a ship which includes: a plurality of main generators that feed power to navigation equipment used in normal navigation and appliances for the living quarters provided within a ship body; and an emergency generator that feeds power to emergency equipment in case of fire or flood. The navigation method includes: an emergency power feeding step for feeding power to the emergency equipment using the emergency generator when at least one of the plurality of main generators is disabled due to fire or flood; and a return-to-port power feeding step for feeding power to return-to-port equipment, required for navigation for returning to port, using the main generators and the emergency generator after the fire or flood has subsided.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: June 8, 2021
    Assignee: MITSUBISHI SHIPBUILDING CO., LTD.
    Inventors: Yusuke Kuchiki, Shingen Takeda, Hiroshi Tamura, Masahiko Mino, Tatsuaki Kanaga, Yushi Ashizawa
  • Publication number: 20210159317
    Abstract: A p-type semiconductor region is formed in a front surface side of an n-type semiconductor substrate. An n-type field stop (FS) region including protons as a donor is formed in a rear surface side of the semiconductor substrate. A concentration distribution of the donors in the FS region include first, second, third and fourth peaks in order from a front surface to the rear surface. Each of the peaks has a peak maximum point, and peak end points formed at both sides of the peak maximum point. The peak maximum points of the first and second peaks are higher than the peak maximum point of the third peak. The peak maximum point of the third peak is lower than the peak maximum point of the fourth peak.
    Type: Application
    Filed: February 4, 2021
    Publication date: May 27, 2021
    Inventors: Hiroki WAKIMOTO, Hiroshi TAKISHITA, Takashi YOSHIMURA, Takahiro TAMURA, Yuichi ONOZAWA
  • Patent number: 11007870
    Abstract: A four-wheel drive vehicle comprises: main drive wheels and sub-drive wheels; a first input rotating member; a first output rotating member; a second input rotating member; a second output rotating member; a first dog clutch; a second dog clutch; a synchromesh mechanism. In the case of canceling a disconnect state in which the power transmitting member interrupts power transmission from the drive power source and the sub-drive wheels, the control device controls an engagement torque of the coupling to a preset first torque and operates the synchromesh mechanism to engage the first dog clutch when it is determined that the rotation speeds are synchronized between the second input rotating member and the second output rotating member, and controls the engagement torque of the coupling to a second torque smaller than the first torque to engage the second dog clutch when it is determined that the first dog clutch is engaged.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: May 18, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroshi Tamura
  • Patent number: 10968999
    Abstract: A differential device for a 4-wheel-drive vehicle wherein a portion of a drive power source drive force transmitted to left and right main drive wheels is transmitted to left and right auxiliary drive wheels through a propeller shaft which is disconnectable from a power transmitting path between the main drive wheels and drive power source, the differential device distributes the drive force from the propeller shaft to the auxiliary drive wheels, and selectively connects and disconnects the propeller and an output shaft to and from each other, the output shaft. The differential device includes a side oil seal between the output shaft and a casing, a side bearing adjacent to the seal in an output shaft axial direction such that the output shaft is rotatably supported by the casing via the bearing, and an oil slinger axially adjacent to the bearing so the slinger is rotated with the output shaft.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: April 6, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroshi Tamura
  • Patent number: 10924048
    Abstract: An inverter control device including at least first and second inverters includes: a current detector that detects a current flowing through a main circuit of the first inverter; a current controller that generates a voltage command value of the first inverter on the basis of a detected current and a current command; and a voltage command predictor that generates a voltage command value of the second inverter on the basis of a variation of the voltage command value of the first inverter.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: February 16, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroshi Tamura, Hiroshi Aoyagi, Tomishige Yatsugi, Shigehisa Aoyagi
  • Publication number: 20210001947
    Abstract: A straddle-type electric vehicle, comprising a pair of left and right main frames, a seat rail extending rearward from a rear portion of each of the main frames, a pivot frame extending downward from a rear portion of each of the main frames, a swing arm supported by the pivot frame, a battery arranged in a space between the main frames, a power unit arranged in the space, a wind guiding duct for guiding traveling wind to the space, and an air outlet port for emitting the traveling wind, the air outlet port being provided so as to be capable of emitting the traveling wind inside the wind guiding duct from a lower portion of a vehicle body to an area below the vehicle body.
    Type: Application
    Filed: September 23, 2020
    Publication date: January 7, 2021
    Inventors: Makoto FUJIKUBO, Katsuhiko SATO, Tsugio IKEDA, Ryo KUBOTA, Yudai HIROSE, Naoya ISHIMATSU, Hiroshi TAMURA
  • Publication number: 20200398922
    Abstract: A straddle-type electric vehicle including a main frame extending in a longitudinal direction of a vehicle body, a pivot frame extending downward from a rear portion of the main frame, and a swing arm which is supported by the pivot frame and by which a rear wheel is swingably supported, the straddle-type electric vehicle, further comprising a battery supported by the main frame, a motor unit configured to be coolable by circulation of a cooling medium, a control apparatus that controls the motor unit based on electric power of the battery, and a heat exchanger connected to the motor unit via a pipe that forms a flow path for the cooling medium, wherein the control apparatus and the heat exchanger are arranged anterior to the battery in alignment with each other.
    Type: Application
    Filed: September 4, 2020
    Publication date: December 24, 2020
    Inventors: Yudai HIROSE, Naoya ISHIMATSU, Hiroshi TAMURA, Ryo KUBOTA
  • Patent number: 10826410
    Abstract: An object of the present invention is to reduce output voltage errors of an inverter circuit and stably control a motor until the motor reaches high speed rotation. An inverter device includes a PWM controller that generates a PWM pulse for converting DC voltage to AC voltage in accordance with an output request of a motor, and an inverter circuit that converts the DC voltage to the AC voltage with the PWM pulse generated by the PWM controller and drives a motor. The PWM controller changes the pulse width of the PWM pulse at predetermined timing on the upper side of the trapezoidal wave when the trapezoidal wave modulation using the trapezoidal wave is performed in the overmodulation region.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: November 3, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Toshiyuki Ajima, Junki Isobe, Midori Takaoka, Akihiro Ashida, Hiroshi Tamura
  • Publication number: 20200280278
    Abstract: An inverter control device including at least first and second inverters includes: a current detector that detects a current flowing through a main circuit of the first inverter; a current controller that generates a voltage command value of the first inverter on the basis of a detected current and a current command; and a voltage command predictor that generates a voltage command value of the second inverter on the basis of a variation of the voltage command value of the first inverter.
    Type: Application
    Filed: November 22, 2016
    Publication date: September 3, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroshi TAMURA, Hiroshi AOYAGI, Tomishige YATSUGI, Shigehisa AOYAGI
  • Patent number: 10655852
    Abstract: This ship includes a ship body, a fuel tank chamber, a stern-side engine room, a bow-side engine room, a main fuel line and a sub-fuel line, and a pump mechanism. The main fuel line connects a fuel tank, a stern-side power generation unit, and a bow-side power generation unit through the bow-side engine room. The sub-fuel line connects at least the fuel tank and the stern-side power generation unit, and is disposed through a section different from the bow-side engine room through which the main fuel line passes. The pump mechanism selectively feeds fuel into the main fuel line or the sub-fuel line from the fuel tank.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: May 19, 2020
    Assignee: MITSUBISHI SHIPBUILDING CO., LTD.
    Inventors: Yusuke Kuchiki, Shingen Takeda, Hiroshi Tamura, Masahiko Mino, Koichi Okuda
  • Publication number: 20200094674
    Abstract: A four-wheel drive vehicle comprises: main drive wheels and sub-drive wheels; a first input rotating member; a first output rotating member; a second input rotating member; a second output rotating member; a first dog clutch; a second dog clutch; a synchromesh mechanism. In the case of canceling a disconnect state in which the power transmitting member interrupts power transmission from the drive power source and the sub-drive wheels, the control device controls an engagement torque of the coupling to a preset first torque and operates the synchromesh mechanism to engage the first dog clutch when it is determined that the rotation speeds are synchronized between the second input rotating member and the second output rotating member, and controls the engagement torque of the coupling to a second torque smaller than the first torque to engage the second dog clutch when it is determined that the first dog clutch is engaged.
    Type: Application
    Filed: September 23, 2019
    Publication date: March 26, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroshi TAMURA
  • Publication number: 20190363646
    Abstract: An object of the present invention is to reduce output voltage errors of an inverter circuit and stably control a motor until the motor reaches high speed rotation. An inverter device includes a PWM controller that generates a PWM pulse for converting DC voltage to AC voltage in accordance with an output request of a motor, and an inverter circuit that converts the DC voltage to the AC voltage with the PWM pulse generated by the PWM controller and drives a motor. The PWM controller changes the pulse width of the PWM pulse at predetermined timing on the upper side of the trapezoidal wave when the trapezoidal wave modulation using the trapezoidal wave is performed in the overmodulation region.
    Type: Application
    Filed: January 18, 2018
    Publication date: November 28, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Toshiyuki AJIMA, Junki ISOBE, Midori TAKAOKA, Akihiro ASHIDA, Hiroshi TAMURA
  • Publication number: 20190291841
    Abstract: A navigation method for a ship which includes: a plurality of main generators that feed power to navigation equipment used in normal navigation and appliances for the living quarters provided within a ship body; and an emergency generator that feeds power to emergency equipment in case of fire or flood. The navigation method includes: an emergency power feeding step for feeding power to the emergency equipment using the emergency generator when at least one of the plurality of main generators is disabled due to fire or flood; and a return-to-port power feeding step for feeding power to return-to-port equipment, required for navigation for returning to port, using the main generators and the emergency generator after the fire or flood has subsided.
    Type: Application
    Filed: July 3, 2017
    Publication date: September 26, 2019
    Inventors: Yusuke KUCHIKI, Shingen TAKEDA, Hiroshi TAMURA, Masahiko MINO, Tatsuaki KANAGA, Yushi ASHIZAWA
  • Publication number: 20190285273
    Abstract: This ship includes a ship body, a fuel tank chamber, a stern-side engine room, a bow-side engine room, a main fuel line and a sub-fuel line, and a pump mechanism. The main fuel line connects a fuel tank, a stern-side power generation unit, and a bow-side power generation unit through the bow-side engine room. The sub-fuel line connects at least the fuel tank and the stern-side power generation unit, and is disposed through a section different from the bow-side engine room through which the main fuel line passes. The pump mechanism selectively feeds fuel into the main fuel line or the sub-fuel line from the fuel tank.
    Type: Application
    Filed: June 14, 2017
    Publication date: September 19, 2019
    Inventors: Yusuke KUCHIKI, Shingen TAKEDA, Hiroshi TAMURA, Masahiko MINO, Koichi OKUDA
  • Patent number: 10355630
    Abstract: An object of the invention is to correct a variation of a gain of a current sensor without causing an increase in size and a high cost of an inverter control device. An inverter control device according to the invention includes a 3-phase/dq-axis conversion unit which converts the output current detected by a current sensor into a dq-axis current and a gain adjustment unit which adjusts a detection gain of the current sensor for each phase. In a case where a current value of a secondary harmonic component contained in the dq-axis current is equal to or more than a predetermined threshold, the gain adjustment unit corrects the gain of the current sensor such that the current value of the secondary harmonic component becomes less than the threshold.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: July 16, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hiroshi Tamura, Hiroyuki Yamada, Shigeyuki Nonomura, Hirokazu Matsui
  • Patent number: 10286665
    Abstract: A liquid ejection head includes a first channel member and a plurality of pressurizing parts. The first channel member includes a plurality of ejection holes, a common channel, a damper chamber, and a damper. The first channel member is configured by a plurality of flat plates including a first plate with the plurality of ejection holes and a second plate adjacent to this. The second plate includes a first part sandwiched between the damper chamber and the first plate. A covering layer is unevenly provided on the first surface of the first part.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: May 14, 2019
    Assignee: Kyocera Corporation
    Inventors: Kousei Horiuchi, Kouichi Maruta, Kazumasa Furuhashi, Yoshihiro Yuu, Ayumu Matsumoto, Hiroshi Tamura, Takayuki Yamamoto
  • Publication number: 20190001673
    Abstract: A liquid ejection head includes a first channel member and a plurality of pressurizing parts. The first channel member includes a plurality of ejection holes, a common channel, a damper chamber, and a damper. The first channel member is configured by a plurality of flat plates including a first plate with the plurality of ejection holes and a second plate adjacent to this. The second plate includes a first part sandwiched between the damper chamber and the first plate. A covering layer is unevenly provided on the first surface of the first part.
    Type: Application
    Filed: July 28, 2016
    Publication date: January 3, 2019
    Applicant: KYOCERA Corporation
    Inventors: Kousei HORIUCHI, Kouichi MARUTA, Kazumasa FURUHASHI, Yoshihiro YUU, Ayumu MATSUMOTO, Hiroshi TAMURA, Takayuki YAMAMOTO
  • Publication number: 20180223983
    Abstract: A differential device for a 4-wheel-drive vehicle wherein a portion of a drive power source drive force transmitted to left and right main drive wheels is transmitted to left and right auxiliary drive wheels through a propeller shaft which is disconnectable from a power transmitting path between the main drive wheels and drive power source, the differential device distributes the drive force from the propeller shaft to the auxiliary drive wheels, and selectively connects and disconnects the propeller and an output shaft to and from each other, the output shaft. The differential device includes a side oil seal between the output shaft and a casing, a side bearing adjacent to the seal in an output shaft axial direction such that the output shaft is rotatably supported by the casing via the bearing, and an oil slinger axially adjacent to the bearing so the slinger is rotated with the output shaft.
    Type: Application
    Filed: February 5, 2018
    Publication date: August 9, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroshi TAMURA
  • Patent number: 10023087
    Abstract: A vehicle seat (10) comprising a seat cushion frame (72) that configures a seat cushion (70); a seat back frame (14) that configures a seat back (12), the seat back frame (14) being formed in a panel shape and having, on a lower portion thereof on both sides in a seat width direction, coupling portions (46) that are coupled to the seat cushion frame (72); fixing portions (20) that are formed in an upper portion of the seat back frame (14) and fix a headrest (60); and load transmitting portions (40) that are disposed in the seat back frame (14), are each formed in a substantially L-shape opening toward the seat rear side and outward in the seat width direction, and couple together the fixing portions (20) and the coupling portions (46).
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: July 17, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Tamura, Akira Kaneko, Takuya Ishikawa
  • Publication number: 20180138845
    Abstract: An object of the invention is to correct a variation of a gain of a current sensor without causing an increase in size and a high cost of an inverter control device. An inverter control device according to the invention includes a 3-phase/dq-axis conversion unit which converts the output current detected by a current sensor into a dq-axis current and a gain adjustment unit which adjusts a detection gain of the current sensor for each phase. In a case where a current value of a secondary harmonic component contained in the dq-axis current is equal to or more than a predetermined threshold, the gain adjustment unit corrects the gain of the current sensor such that the current value of the secondary harmonic component becomes less than the threshold.
    Type: Application
    Filed: April 28, 2016
    Publication date: May 17, 2018
    Inventors: Hiroshi TAMURA, Hiroyuki YAMADA, Shigeyuki NONOMURA, Hirokazu MATSUI