Patents by Inventor Kazuki Yoshimura

Kazuki Yoshimura 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: 20210190025
    Abstract: The conventional penetration control has a problem that the penetrations of all the injection holes change. An object of the invention is to provide a fuel injection valve having a simple structure and capable of selectively controlling a penetration force of spray injected in a piston direction by a lift amount. In order to solve the above problem, the fuel injection valve of the invention is a fuel injection valve for injecting fuel to a combustion chamber of an internal combustion engine, which includes a valve body that is lifted by any one of a first lift amount of a maximum valve body lift amount and a second lift amount smaller than the first lift amount.
    Type: Application
    Filed: November 13, 2018
    Publication date: June 24, 2021
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Tomoyuki HOSAKA, Eiji ISHII, Kazuki YOSHIMURA, Noriyuki MAEKAWA
  • Patent number: 11016359
    Abstract: In one aspect of the present invention, a hydrogen occlusion body includes: a hydrogen occlusion layer containing a material whose optical property reversibly changes upon hydrogenation and dehydrogenation; and a catalyst layer containing a palladium-ruthenium alloy.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: May 25, 2021
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Yasusei Yamada, Kazuki Yoshimura
  • Publication number: 20210131372
    Abstract: An object of the present invention is to provide a control device of an injector capable of suppressing the influence of pressure reduction boiling even if pressure in a combustion chamber is low. In a case where the temperature of fuel injected from a fuel injection valve is within a set high temperature region and the pressure of the combustion chamber is within a set low pressure region, the control device of an in-cylinder direct injection-type injector according to the present invention controls to increase a lift amount of the injector as compared to the case of a low temperature region or a high pressure region.
    Type: Application
    Filed: February 5, 2018
    Publication date: May 6, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomoyuki HOSAKA, Taisuke SUGII, Eiji ISHII, Kazuki YOSHIMURA, Yoshihiro SUKEGAWA, Masayuki SARUWATARI
  • Patent number: 10995655
    Abstract: A fuel injection device including a valve body having an injection hole-formed part having a plurality of injection holes on the leading end side of the valve body. An injection hole comprises a crossing angle, ?1, between a central axis of the injection hole-formed part and an injection hole axis, and another injection hole comprises a crossing angle, ?2, between the central axis and another injection hole axis. ?2 is larger than ?1. The injection holes are formed such that a distance between the central axis and an inlet surface center of the injection hole is longer than a distance between the central axis and another inlet surface center of the another injection hole. A straight line beyond an outlet surface in the injection hole axis does not intersect with another straight line beyond another outlet surface in the another injection hole axis.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: May 4, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akira Iizuka, Tohru Ishikawa, Takao Miyake, Kazuki Yoshimura
  • Patent number: 10907601
    Abstract: A fuel injection valve includes a valve seat, a valve element, and a plurality of swirl fuel injection passages. The plurality of swirl fuel injection passages are divided into a first swirl fuel injection passage group that forms a first spray and a second swirl fuel injection passage group that forms a second spray that is oriented in a direction different from a first direction.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: February 2, 2021
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Mitsuhiro Matsuzawa, Kazuki Yoshimura, Eiji Ishii, Akihiro Yamazaki, Takahiro Saito, Nobuaki Kobayashi
  • Patent number: 10876508
    Abstract: Provided is a fuel injection valve which can be easily processed and can realize sufficient atomization while suppressing spreading of spray.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: December 29, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Mitsuhiro Matsuzawa, Kazuki Yoshimura, Eiji Ishii, Akihiro Yamazaki, Takahiro Saito, Nobuaki Kobayashi
  • Publication number: 20200400112
    Abstract: An object of the present invention is to provide a fuel injection valve that realizes atomization while suppressing spread of a spray. A fuel injection valve includes: a valve body and a valve seat that cooperate to open and close a fuel passage; a swirl imparting chamber that is arranged on a downstream side of an opening and closing portion of the fuel passage by the valve body and the valve seat, and imparts a swirling velocity to fuel; a communication passage arranged on an upstream side of the swirl imparting chamber and connected to the swirl imparting chamber; and fuel injection holes and that are open at a bottom surface of the swirl imparting chamber and injects fuel imparted with the swirling velocity in a swirl passage to an outside, the fuel injection holes and configured such that cross-sectional areas of the fuel injection holes and increase from the inlet to the outlet.
    Type: Application
    Filed: September 25, 2018
    Publication date: December 24, 2020
    Inventors: Hiroshi MUKAI, Mitsuhiro MATSUZAWA, Akihiro YAMAZAKI, Masaki NAGAOKA, Takahiro SAITO, Eiji ISHII, Taisuke SUGII, Kazuki YOSHIMURA
  • Patent number: 10815949
    Abstract: Provided is a structure capable of reducing dribbling of fuel generated when a valve body is closed. In order to achieve the above object, a fuel injection device includes: a valve body; and a seat member having a seat portion on which the valve body is seated and having a fuel injection hole formed on a downstream side of the seat portion. The seat member is formed such that a gap between the seat member and the opposing valve body in the whole region on the downstream side of the fuel injection hole is smaller than a diameter of the fuel injection hole.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: October 27, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshihito Yasukawa, Kiyotaka Ogura, Takao Miyake, Akira Iizuka, Kazuki Yoshimura, Akiyasu Miyamoto
  • Patent number: 10718304
    Abstract: It is prevented that residual fuel left in the vicinity of an injection nozzle outlet is carbonized to cause adherence of the carbonized fuel as deposit and changing of a spray pattern or an injection flow rate. A fuel injection valve includes a seat portion on which a valve body is seated and a seat portion in which an injection hole for injecting fuel downstream from the seat portion is formed, in which a concave surface denting in a direction opposite to a fuel injecting direction is formed on an outer peripheral side away from the injection hole at an end face located downstream of the seat member, and the concave surface is formed such that a material surface in an outer peripheral region has a larger wettability for the fuel than in an inner peripheral region.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: July 21, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Eiji Ishii, Kazuki Yoshimura, Taisuke Sugii
  • Publication number: 20200182212
    Abstract: Provided is a fuel injection valve which can be easily processed and can realize sufficient atomization while suppressing spreading of spray.
    Type: Application
    Filed: September 1, 2017
    Publication date: June 11, 2020
    Inventors: Mitsuhiro MATSUZAWA, Kazuki YOSHIMURA, Eiji ISHII, Akihiro YAMAZAKI, Takahiro SAITO, Nobuaki KOBAYASHI
  • Patent number: 10677208
    Abstract: Provided is a fuel injector that is capable of reducing penetration. The fuel injector of the present invention includes a valve body having a valve body side seat surface, a valve seat side seat surface that abuts on the valve body side seat surface, and an injection hole that is provided downstream of a position at which the valve body side seat surface abuts on the valve seat side seat surface. The valve body has a projection that is formed from the valve body side seat surface toward the injection hole, and the projection is formed to be smaller in a direction of fuel flow between seats than a radius of an upstream opening surface of the injection hole.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: June 9, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomoyuki Hosaka, Eiji Ishii, Yoshihiro Sukegawa, Taisuke Sugii, Kazuki Yoshimura, Kazuhiro Oryoji, Masayuki Saruwatari
  • Publication number: 20200032755
    Abstract: Movement of a valve body in an unspecified direction due to a minute clearance existing between a valve body and a guide changes the flow of fuel flowing into injection holes every injection, thereby leading to variation in respective beams of spray from the injection holes and the flow rate of injection between the injection holes. Provided are a valve body that sits on or separates from a seat; a plurality of guides that slidably guide the valve body; and a plurality of flow channel portions each formed between each guide adjacent circumferentially. Then, among the plurality of flow channel portions, the cross-sectional area of the first flow channel portion on a horizontal plane orthogonal to the central axis of the valve body is smaller than each of the cross-sectional areas of the remaining flow channel portions on the horizontal plane.
    Type: Application
    Filed: January 30, 2018
    Publication date: January 30, 2020
    Applicant: HITACHI, LTD.
    Inventors: Eiji ISHII, Kazuki YOSHIMURA, Yoshihito YASUKAWA
  • Publication number: 20190360445
    Abstract: It is possible to prevent a change in the spray pattern and injection flow rate and an increase of particulate matters in the exhaust gas due to residual fuel left in the vicinity of an injection hole outlet carbonized and adhered as deposit. A fuel injection valve includes a displaceable valve body, a valve seat surface that touches the valve body, and an injection hole cup including at least one injection hole formed on the valve body's tip end side and beyond where the valve seat surface touches the valve body. The injection hole cup includes a low lipophilic portion and a lipophilic portion formed on the injection hole cup's surface, the lipophilic portion is formed inside at least a part of a range in which the low lipophilic portion is formed, and at least one portion of the low lipophilic portion is connected to the injection hole's end portion.
    Type: Application
    Filed: November 24, 2017
    Publication date: November 28, 2019
    Applicant: HITACHI, LTD.
    Inventors: Taisuke SUGII, Eiji ISHII, Kazuki YOSHIMURA, Tomoyuki HOSAKA
  • Publication number: 20190257264
    Abstract: A fuel injection device including a valve body having an injection hole-formed part having a plurality of injection holes on the leading end side of the valve body. An injection hole comprises a crossing angle, ?1, between a central axis of the injection hole-formed part and an injection hole axis, and another injection hole comprises a crossing angle, ?2, between the central axis and another injection hole axis. ?2 is larger than ?1. The injection holes are formed such that a distance between the central axis and an inlet surface center of the injection hole is longer than a distance between the central axis and another inlet surface center of the another injection hole. A straight line beyond an outlet surface in the injection hole axis does not intersect with another straight line beyond another outlet surface in the another injection hole axis.
    Type: Application
    Filed: November 21, 2017
    Publication date: August 22, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akira IIZUKA, Tohru ISHIKAWA, Takao MIYAKE, Kazuki YOSHIMURA
  • Publication number: 20190250483
    Abstract: In one aspect of the present invention, a hydrogen occlusion body includes: a hydrogen occlusion layer containing a material whose optical property reversibly changes upon hydrogenation and dehydrogenation; and a catalyst layer containing a palladium-ruthenium alloy.
    Type: Application
    Filed: August 10, 2017
    Publication date: August 15, 2019
    Applicant: National Institute of Advanced Industrial Science and Technology
    Inventors: Yasusei YAMADA, Kazuki YOSHIMURA
  • Publication number: 20190211791
    Abstract: Provided is a structure capable of reducing dribbling of fuel generated when a valve body is closed. In order to achieve the above object, a fuel injection device includes: a valve body; and a seat member having a seat portion on which the valve body is seated and having a fuel injection hole formed on a downstream side of the seat portion. The seat member is formed such that a gap between the seat member and the opposing valve body in the whole region on the downstream side of the fuel injection hole is smaller than a diameter of the fuel injection hole.
    Type: Application
    Filed: April 13, 2017
    Publication date: July 11, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshihito YASUKAWA, Kiyotaka OGURA, Takao MIYAKE, Akira IIZUKA, Kazuki YOSHIMURA, Akiyasu MIYAMOTO
  • Patent number: 10344726
    Abstract: The purpose of the present invention is to provide a fuel injection valve that can achieve sufficient atomization even if the spray angle is narrow.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: July 9, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kazuki Yoshimura, Mitsuhiro Matsuzawa, Eiji Ishii, Akihiro Yamazaki, Takahiro Saito, Nobuaki Kobayashi
  • Publication number: 20190170102
    Abstract: An object of the invention is to achieve sufficient atomization, while preventing a spray from spreading. A fuel injection valve includes a plurality of swirl fuel injection passages. Each of the swirl fuel injection passages includes a swirl chamber, a swirl chamber introduction passage, and an orifice and imparts a swirling force to fuel to thereby inject the fuel outside. A rectangular coordinate system is imagined on an imaginary plane. The rectangular coordinate system has a center of an inlet opening surface of the orifice as an origin and has an X-axis extending in parallel with a centerline of the swirl chamber introduction passage and being positive in a direction from an upstream side toward a downstream side of the swirl chamber introduction passage and a Y-axis extending perpendicularly to the X-axis and being positive in a direction away from the centerline.
    Type: Application
    Filed: January 20, 2017
    Publication date: June 6, 2019
    Inventors: Mitsuhiro MATSUZAWA, Kazuki YOSHIMURA, Eiji ISHll, Akihiro YAMAZAKI, Takahiro SAITO, Nobuaki KOBAYASHI
  • Publication number: 20190063392
    Abstract: It is prevented that residual fuel left in the vicinity of an injection nozzle outlet is carbonized to cause adherence of the carbonized fuel as deposit and changing of a spray pattern or an injection flow rate. A fuel injection valve includes a seat portion on which a valve body is seated and a seat portion in which an injection hole for injecting fuel downstream from the seat portion is formed, in which a concave surface denting in a direction opposite to a fuel injecting direction is formed on an outer peripheral side away from the injection hole at an end face located downstream of the seat member, and the concave surface is formed such that a material surface in an outer peripheral region has a larger wettability for the fuel than in an inner peripheral region.
    Type: Application
    Filed: December 16, 2016
    Publication date: February 28, 2019
    Inventors: Eiji ISHII, Kazuki YOSHIMURA, Taisuke SUGII
  • Publication number: 20190033503
    Abstract: An object of the present invention is to provide a light-modulating member which restrains incidence of sunlight into a room in summer and does not restrain incidence of sunlight into a room in winter, and is also easily used as a member for window. The present invention relates to a light-modulating member produced by arranging one or a plurality of shaped resin sheets having projections on one surface, wherein the projection has a height of 1 ?m or more and 1 cm or less and a pitch interval of 10 ?m or more and 10 cm or less.
    Type: Application
    Filed: October 5, 2018
    Publication date: January 31, 2019
    Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takayuki MINO, Katsumi AKADA, Yoshinobu NOZUE, Kazuki YOSHIMURA