Patents by Inventor Tomoyuki HOSAKA

Tomoyuki HOSAKA 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
  • 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: 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: 20200049118
    Abstract: An object of the present invention is to provide a fuel injection valve that can be used in a gasoline engine and can take fuel into an injection hole with a small pressure loss near a seat portion on which a valve is seated. Thus, the present invention provides a fuel injection valve for a gasoline engine which includes: a plurality of injection holes; and a seat portion that opens and closes a fuel passage to the plurality of injection holes in cooperation with a valve. At least one fuel injection hole among the plurality of injection holes is configured in a shape such that an injection hole inlet has a long axis and a short axis, and the long axis is directed in a direction in which an extension line intersects with the seat portion.
    Type: Application
    Filed: April 19, 2018
    Publication date: February 13, 2020
    Inventors: Takaki ITAYA, Tomoyuki HOSAKA, Noriyuki MAEKAWA, Takao MIYAKE
  • 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: 20190211763
    Abstract: Provided is a fuel injection device and a control unit therefor which enable reliable ignition even in a case where fuel pressure is low immediately after starting an engine. In the control unit for controlling an injector injecting fuel into an internal combustion engine, a plurality of injectors is provided in the internal combustion engine, a static flow rate of a first injector is configured to be smaller than a static flow rate of a second injector. In a case where a fuel pressure of fuel supplied by a pressurizing unit is lower than a set value set lower than a fuel pressure in warming up, an injection ratio of the first injector is controlled to increase according to a difference between a fuel pressure of fuel from the pressurizing unit and a fuel pressure in warming up.
    Type: Application
    Filed: August 2, 2017
    Publication date: July 11, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Tomoyuki HOSAKA, Taisuke SUGII, Eiji ISHII, Yoshihiro SUKEGAWA, Masayuki SARUWATARI
  • Publication number: 20190040814
    Abstract: A fuel injection valve capable of forming a homogeneous air-fuel mixture in homogeneous combustion at a low engine speed and a control device thereof are provided. According to the present invention, a fluid injection valve that is configured separately from a fuel injection valve and has a function of injecting a fluid is provided and a control device of the fuel injection valve includes a control unit that performs control such that fuel is injected from the fuel injection valve and then controls the fluid injection valve such that the fluid is injected from the fluid injection valve and the fuel injected from the fuel injection valve is stirred.
    Type: Application
    Filed: November 16, 2016
    Publication date: February 7, 2019
    Inventors: Tomoyuki HOSAKA, Taisuke SUGII, Eiji ISHII, Yoshihiro SUKEGAWA, Masayuki SARUWATARI, Kazuhiro ORYOJI
  • Publication number: 20180149127
    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: Application
    Filed: April 8, 2016
    Publication date: May 31, 2018
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Tomoyuki HOSAKA, Eiji ISHII, Yoshihiro SUKEGAWA, Taisuke SUGII, Kazuki YOSHIMURA, Kazuhiro ORYOJI, Masayuki SARUWATARI