Patents by Inventor Hiroki Fujii

Hiroki Fujii 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).

  • Publication number: 20220196750
    Abstract: A battery state estimation apparatus calculates a measured DC resistance value of a DC resistance based on a current change amount and a voltage change amount, which are calculated in a predetermined period using measured current value and voltage value. The battery state estimation apparatus further calculates (i) a non-temperature dependent constant and (ii) a constant of a temperature dependent function based on (i) an estimated DC resistance value and (ii) the measured DC resistance value. The estimated DC resistance value is an estimated value of the measured DC resistance value; the estimated DC resistance value is represented as a sum of (i) the non-temperature dependent constant Ra, which indicates a temperature independent component of the DC resistance of the secondary battery, and (ii) the temperature dependent function Rb, which indicates a temperature dependent component of the DC resistance of the secondary battery.
    Type: Application
    Filed: March 14, 2022
    Publication date: June 23, 2022
    Inventors: Yuri SANO, Hiroki FUJII, Koji OHIRA
  • Patent number: 11355981
    Abstract: A stator includes a stator core in which an annular back yoke is integrated with a plurality of teeth circumferentially arranged on the back yoke at intervals, and an insulator that sandwiches the stator core from axial sides of the stator core. The insulator is molded integrally with the stator core using resin molding such that the insulator covers an inner surface of a slot portion of the stator core. A motor includes a rotor and the stator radially facing the rotor. A compressor includes a hermetic container, a compression mechanism disposed in the hermetic container, the motor disposed in the hermetic container to drive the compression mechanism.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: June 7, 2022
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroki Shirasaka, Keiji Aota, Hideki Fujii, Shoujirou Naka, Yoshihiro Igarashi
  • Patent number: 11346343
    Abstract: A vane pump including a housing having a peripheral wall portion, a bottom wall portion, and a pump chamber; a rotor disposed in the pump chamber to be rotatable; a vane disposed to be slidable in the radial direction with respect to the rotor and partitioning the pump chamber into working chambers; and a reed valve that opens and closes a discharge hole of the bottom wall portion. A pressure relief groove is disposed in a portion of the bottom wall portion corresponding to the discharge section with a clearance secured between the peripheral wall portion and the pressure relief groove. When the vane overlaps the pressure relief groove, a pair of the working chambers on both sides of the vane in the rotational direction communicates with each other via the pressure relief groove.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: May 31, 2022
    Assignees: TAIHO KOGYO Co., Ltd., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji Suzuki, Akihiro Uto, Naoyuki Miyara, Hiroki Hara, Shinsuke Kiyomiya, Akira Fujii
  • Patent number: 11342769
    Abstract: A control device comprises an acquisition unit that acquires a current to or from the battery and a voltage of a battery, a calculation unit that calculates an internal resistance of the battery based on the current and the voltage when the regenerative power generation is performed by a rotary electric machine, and a permission determination unit that determines whether to permit an automatic stop of an engine depending on whether restarting of the engine is enabled based on power running drive of the rotary electric machine. The calculation unit calculates a value of the internal resistance each time the regenerative power generation or the power running drive is performed before the engine enters an automatic stop state. The permission determination unit determines whether to permit the automatic stop based on a latest value of the internal resistance among values of the internal resistance calculated by the calculation unit.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: May 24, 2022
    Assignee: DENSO CORPORATION
    Inventors: Tetsuya Watanabe, Yuki Tachibana, Hiroki Fujii
  • Patent number: 11332831
    Abstract: An insulating coating for an electrical steel sheet is provided that is formed on a surface of a base metal of the electrical steel sheet and that contains a polyvalent metal phosphate of one or more elements selected from Al, Zn, Mg and Ca, and has an enriched layer of a divalent metal at an interface with the surface of the base metal. An enrichment of the divalent metal contained in the enriched layer is 0.01 g/m2 or more and less than 0.2 g/m2.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: May 17, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Shuichi Yamazaki, Masaru Takahashi, Kazutoshi Takeda, Hiroyasu Fujii, Akira Akagi, Hiroki Hori
  • Publication number: 20220024286
    Abstract: A reinforcement sheet is stuck onto a metal panel. The reinforcement sheet includes a resin layer and a constraining layer disposed on one side of the resin layer in the thickness direction. The reinforcement sheet extends in a first direction and a second direction. An outer circumferential edge on one side of the reinforcement sheet in the first direction has a curved shape protruding toward the one side in the first direction.
    Type: Application
    Filed: December 2, 2019
    Publication date: January 27, 2022
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroki FUJII, Naoto KATO, Hideyuki SUZUKI
  • Publication number: 20220027070
    Abstract: Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.
    Type: Application
    Filed: October 7, 2021
    Publication date: January 27, 2022
    Applicant: HITACHI, LTD.
    Inventors: Hiroki FUJII, Yoshinori OHIRA, Takeru CHIBA, Yoshiaki DEGUCHI
  • Publication number: 20210382788
    Abstract: A storage system including a storage controller and a plurality of storage drives generates parity data from data. Data and parity data configure a stripe. A plurality of stripes configure a parity group allocated with a plurality of storage drives to store the parity group. A first parity group allows the number of storage drives allocated to the parity group to be equal to the number of data pieces configuring each stripe. A second parity group allows the number of storage drives allocated to the parity group to be larger than the number of data pieces configuring each stripe and allows data for each stripe to be distributed and stored in different combinations of storage drives. When the first parity group is converted to the second parity group, a storage drive is added so that it is allocated to the parity group. Data is moved to ensure a free area.
    Type: Application
    Filed: March 15, 2021
    Publication date: December 9, 2021
    Inventors: Takeru CHIBA, Hiroki FUJII, Yoshiaki DEGUCHI
  • Patent number: 11150820
    Abstract: Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: October 19, 2021
    Assignee: HITACHI, LTD.
    Inventors: Hiroki Fujii, Yoshinori Ohira, Takeru Chiba, Yoshiaki Deguchi
  • Publication number: 20210191828
    Abstract: A storage controller of a storage system performs, when failures occur in at least two drives, priority rebuilding and normal rebuilding in parallel, the priority rebuilding being performed so as to perform rebuilding using a reading drive for reading data for restoration of priority rebuild data to be preferentially rebuilt and a writing drive specified for writing the priority rebuild data restored, the normal rebuilding being performed so as to rebuilt normal rebuild data by using a specified reading drive and a specified writing drive.
    Type: Application
    Filed: September 23, 2020
    Publication date: June 24, 2021
    Inventors: Sho SAWADA, Hidenori SUZUKI, Eiju KATSURAGI, Shintarou INOUE, Hiroki FUJII
  • Publication number: 20210181958
    Abstract: Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.
    Type: Application
    Filed: September 16, 2020
    Publication date: June 17, 2021
    Applicant: HITACHI, LTD.
    Inventors: Hiroki FUJII, Yoshinori OHIRA, Takeru CHIBA, Yoshiaki DEGUCHI
  • Patent number: 10915401
    Abstract: A disclosed method includes selecting one or more regions having a predetermined size or more in a logical address space of a first memory drive when the first memory drive is partially failed, transferring data of the one or more selected regions to a second memory drive, reading data from another memory drive, which forms a RAID group with the first memory drive, to restore lost data caused by the partial failure, and writing the restored lost data to the first memory drive.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: February 9, 2021
    Assignee: HITACHI, LTD.
    Inventors: Hiroki Fujii, Hideyuki Koseki
  • Patent number: 10910492
    Abstract: A semiconductor device which can secure a high breakdown voltage and to which a simplified manufacturing process is applicable and a method for manufacturing the semiconductor device are provided. An n+ buried region has a floating potential. An n-type body region is located on a first surface side of the n+ buried region. A p+ source region is located in the first surface and forms a p-n junction with the n-type body region. A p+ drain region is located in the first surface spacedly from the p+ source region. A p-type impurity region PIR is located between the n+ buried region and the n-type body region and isolates the n+ buried region and the n-type body region from each other.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 2, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Hiroki Fujii, Atsushi Sakai, Takahiro Mori
  • Patent number: 10802958
    Abstract: A storage device determines whether or not reading target data subjected to a first conversion process is divided and stored into multiple pages. When the data subjected to the first conversion process is stored in one of a plurality of pages, the data is read from the page, and a second conversion process for returning the data to a state before the data is subjected to the first conversion process is executed to the data. When the reading target data is divided and stored into two or more of the plurality of pages, a portion of the data is read from each of the two or more pages in which the portion of the data is stored, the portion of the data is stored in the buffer memory, the data subjected to the first conversion process is restored, and the second conversion process is executed to the restored data.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: October 13, 2020
    Assignee: HITACHI, LTD.
    Inventors: Hiroki Fujii, Hideyuki Koseki, Atsushi Kawamura
  • Publication number: 20200285551
    Abstract: In an upper storage device, a BEPK and an MP are provided, each of a plurality of lower storage devices has a plurality of stripes configuring a plurality of stripe rows, each of the plurality of stripe rows is a row of two or more stripes which the plurality of lower storage devices have, respectively, when each of the plurality of stripe rows stores a plurality of data elements and a redundant code and a predetermined allowable number of lower storage devices fail, the data elements in the stripes can be restored and the MP controls a processing speed in restoration processing, on the basis of restoration priorities for the data elements or the redundant code of failed stripes in the failed lower storage devices.
    Type: Application
    Filed: September 3, 2019
    Publication date: September 10, 2020
    Applicant: HITACHI, LTD.
    Inventors: Hiroki FUJII, Yoshinori OHIRA
  • Publication number: 20200073586
    Abstract: An information processing apparatus includes a storage controller and a storage device. The storage controller manages a first address space in which data is recorded in a log-structured format in response to a write request from a host. The storage device manages a second address space in which data is recorded in a log-structured format in response to a write request from the storage controller. The storage controller sets a unit by which the storage controller performs garbage collection in the first address space to a multiple of a unit by which the storage device performs garbage collection in the second address space.
    Type: Application
    Filed: March 5, 2019
    Publication date: March 5, 2020
    Inventors: Naruki KURATA, Hiroki FUJII, Masahiro TSURUYA
  • Patent number: 10468523
    Abstract: A recessed portion is formed in a top surface of an isolation insulation film filling an isolation trench between a p+ source region and a p+ drain region. A p? drift region is located below the isolation trench and connected to the p+ drain region. A gate electrode fills the recessed portion. An n-type impurity region is located below the p? drift region and directly below the recessed portion.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: November 5, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Hiroki Fujii, Takahiro Mori
  • Publication number: 20190334371
    Abstract: A control device comprises an acquisition unit that acquires a current to or from the battery and a voltage of a battery, a calculation unit that calculates an internal resistance of the battery based on the current and the voltage when the regenerative power generation is performed by a rotary electric machine, and a permission determination unit that determines whether to permit an automatic stop of an engine depending on whether restarting of the engine is enabled based on power running drive of the rotary electric machine. The calculation unit calculates a value of the internal resistance each time the regenerative power generation or the power running drive is performed before the engine enters an automatic stop state. The permission determination unit determines whether to permit the automatic stop based on a latest value of the internal resistance among values of the internal resistance calculated by the calculation unit.
    Type: Application
    Filed: July 11, 2019
    Publication date: October 31, 2019
    Applicant: DENSO CORPORATION
    Inventors: Tetsuya WATANABE, Yuki TACHIBANA, Hiroki FUJII
  • Publication number: 20190220358
    Abstract: A disclosed method includes selecting one or more regions having a predetermined size or more in a logical address space of a first memory drive when the first memory drive is partially failed, transferring data of the one or more selected regions to a second memory drive, reading data from another memory drive, which forms a RAID group with the first memory drive, to restore lost data caused by the partial failure, and writing the restored lost data to the first memory drive.
    Type: Application
    Filed: February 6, 2017
    Publication date: July 18, 2019
    Applicant: Hitachi, Ltd.
    Inventors: Hiroki FUJII, Hideyuki KOSEKI
  • Patent number: 10229909
    Abstract: A semiconductor device includes a high voltage NMOS transistor formation region defined by an element isolation insulating film, a CMOS transistor formation region defined by an element isolation insulating film, and a substrate contact portion. The substrate contact portion is formed in a region of a semiconductor substrate that is positioned between the high voltage NMOS transistor formation region and the element isolation insulating film so as to reach from the main surface side to a position deeper than the bottom of the element isolation insulating film. The substrate contact portion is in contact with the semiconductor substrate from a depth over a depth.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: March 12, 2019
    Assignee: Renesas Electronics Corporation
    Inventors: Shigeo Tokumitsu, Hiroki Fujii