Patents by Inventor Takao Miyake

Takao Miyake 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: 20200291910
    Abstract: Provided is a fuel injection valve capable of quickly stopping a position of a movable element at a predetermined position after closing a valve while reducing an impact force of a valve body. Therefore, a valve body 101 includes a sleeve 113. A first movable core 201 (first movable element) lifts the valve body 101 by the attractive force of a magnetic core 107. A second movable core 202 (second movable element) further lifts the valve body 101 by the attractive force of the magnetic core 107 after the first movable core 201 (first movable element) lifts the valve body 101. After the valve body 101 is seated on the seat member 102 and the second movable core 202 (second movable element) is separated from the sleeve 113, a bottom surface 201g of the first movable core 201 (first movable element) collides with a storage bottom surface 111b (collision receiving portion).
    Type: Application
    Filed: September 28, 2018
    Publication date: September 17, 2020
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Akiyasu MIYAMOTO, Yasuo NAMAIZAWA, Takao MIYAKE, Takuya WATAI
  • Publication number: 20200240380
    Abstract: Dispersibility of fuel in a combustion chamber is improved while adhesion of the fuel to a structure in the combustion chamber is suppressed, and a combustion state of the fuel in the combustion chamber is improved, thereby improving fuel efficiency and suppressing incomplete combustion. Therefore, in a fuel injection valve provided with the plurality of fuel injection holes surrounded by a seat portion, the fuel injection holes have different penetrations. At least one high-pressure fuel injection hole having the longest penetration and low-pressure fuel injection holes excluding the fuel injection hole are included. Among the inter-inlet distances of the adjacent fuel injection holes, an inter-inlet distance between the fuel injection hole and the fuel injection holes adjacent thereto is widest.
    Type: Application
    Filed: November 15, 2018
    Publication date: July 30, 2020
    Inventors: Takaki ITAYA, Noriyuki MAEKAWA, Takao MIYAKE
  • Publication number: 20200232433
    Abstract: For a fuel injection device, a configuration to improve fuel sealability when a valve is closed is provided. Therefore, the fuel injection device includes: a valve body that opens and closes a fuel flow path; a movable iron core in which a fuel passage hole communicating an upstream side and a downstream side is formed, and that operates the valve body toward the upstream side; a biasing spring whose one end contacts the movable iron core, and that biases the movable iron core in a valve opening direction; and a regulating unit that regulates movement of the one end of the biasing spring, in which the shortest distance between the one end of the biasing spring and the fuel passage hole is larger than a radial travel distance of the one end until radial movement of the one end is regulated by the regulating unit.
    Type: Application
    Filed: October 31, 2018
    Publication date: July 23, 2020
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Masashi SUGAYA, Takao MIYAKE, Yasuo NAMAIZAWA
  • Patent number: 10704486
    Abstract: The purpose of the present invention is to provide a drive device that improves the precision of injection quantities by stabilizing the behavior of a valve body 214 under the condition that a valve body reaches a height position lower than a maximum height position and making the injection pulse width and the injection quantity gradient small.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: July 7, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo Kusakabe, Takatoshi Iizuka, Takao Miyake, Masashi Sugaya, Kiyotaka Ogura, Shirou Yamaoka
  • Patent number: 10704518
    Abstract: A spark-ignition direct fuel injection valve includes, at least, a seat member provided with a fuel injection hole and a valve seat and a valve body which controls fuel injection from the injection hole by contacting and separating from the valve seat. In the spark-ignition direct fuel injection valve: the injection hole has an injection hole inlet which is open inwardly of the seat member and an injection hole outlet which is open outwardly of the seat member; an opening edge of the injection hole inlet has a first round-chamfered portion formed on an upstream side with respect to a fuel flow toward the injection hole inlet; and an extending length (L) of the injection hole does not exceed three times a hole diameter (D) of the injection hole.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: July 7, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshihito Yasukawa, Kiyotaka Ogura, Takao Miyake, Eiji Ishii, Motoyuki Abe, Tohru Ishikawa
  • Patent number: 10690097
    Abstract: Provided is an electromagnetic valve capable of stabilizing an injection amount even when injection is performed while an intermediate member continues to be displaced after valve closing and returns to a closed valve standby state. For that purpose, a valve body 303 opens or closes a flow path. A movable iron core 404 moves the valve body 303 in a valve opening direction using a magnetic attraction force. An intermediate member 414 forms a preliminary stroke gap (g1) between the movable iron core 404 and the valve body 303 in a closed valve state. A stopper portion 410c collides with the intermediate member 414 when the intermediate member 414 moves in a direction in which the preliminary stroke gap (g1) is reduced.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: June 23, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masashi Sugaya, Kiyotaka Ogura, Takao Miyake, Yoshihito Yasukawa
  • Publication number: 20200165998
    Abstract: Provided are a flow volume control device capable of securing a strength withstanding a high fuel pressure, and a method for manufacturing the flow volume control device. A fuel injection valve 1 includes a movable element 102 and a nozzle holder 101 that is positioned on the outer peripheral side of the movable element 102 and holds the movable element 102 inside in a radial direction. The nozzle holder 101 is molded using precipitation hardening stainless steel as a material. In addition, the manufacturing method includes forging and molding a material by forging using the precipitation hardening stainless steel as the nozzle holder 101, performing solution thermal treatment on the material after the forging and molding step, and performing precipitation hardening thermal treatment on the material after the solution thermal treatment, and finishing and molding the material after the precipitation hardening thermal treatment.
    Type: Application
    Filed: July 17, 2018
    Publication date: May 28, 2020
    Inventors: Takao MIYAKE, Masaru KAWAI, Masashi SUGAYA, Yasuo NAMAIZAWA
  • 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: 20190338740
    Abstract: The present invention is directed to achieving an appropriate L/D of each injection hole in a fuel injection device in which a plurality of injection holes is formed. To achieve the object, provided is a fuel injection device including a valve body and an injection hole forming portion in which a plurality of injection holes is formed on a more downstream side than a seat portion on which the valve body is seated, in which the injection hole forming portion is formed in a manner such that a valve body central axis and a central axis of the injection hole forming portion are horizontally deviated in a vertical cross-sectional surface passing through the valve body central axis.
    Type: Application
    Filed: January 30, 2018
    Publication date: November 7, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Kiyotaka Ogura, Takao Miyake, Atsushi Hohkita
  • Patent number: 10415527
    Abstract: Recent exhaust gas regulation requires reduction of an amount and quantity of particulate matter included in an exhaust gas, and a normal maximum fuel pressure may be increased to approximately 35 MP. When the normal maximum fuel pressure is 35 MPa, a fuel injection valve is required to work for example at a pressure up to 45 MPa. In such a condition, a fluid force may exceed a valve opening force depending on a seat diameter, and a needle valve cannot be kept open and closed, when opening thereof is required.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: September 17, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takao Miyake, Atsushi Nakai, Kiyotaka Ogura, Akira Iizuka
  • Publication number: 20190279815
    Abstract: A method of manufacturing a coil component includes a heating step of locally heating metal terminals while the metal terminals are supported by a pressing member having a contact surface capable of coming into contact with the metal terminals in a state where an adhesive is disposed between the metal terminals and a drum core.
    Type: Application
    Filed: March 4, 2019
    Publication date: September 12, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Takashi MURAKAMI, Akio IGARASHI, Takao MIYAMOTO, Kazuo MIYAKE
  • 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: 20190249631
    Abstract: Provided is a fuel injection valve capable of stroking a valve body in large and small two stages and capable of precisely controlling an injection flow rate at the stroke. Therefore, the fuel injection valve of the present invention is provided with a valve body for opening or closing a flow path, a movable element for driving the valve body in a valve opening direction, and a magnetic core for attracting the movable element, in which the movable element is separately configured from the valve body, and is configured by a first movable element having a first facing surface facing the magnetic core and having the first facing surface attracted by the magnetic core, and a second movable element separately configured from the first movable element, having a second facing surface facing the magnetic core, and having the second facing surface attracted by the magnetic core.
    Type: Application
    Filed: July 12, 2017
    Publication date: August 15, 2019
    Inventors: Akiyasu MIYAMOTO, Kiyotaka OGURA, Atsushi HOHKITA, Yuto ISHIZUKA, Takao MIYAKE
  • Patent number: 10378496
    Abstract: An object of the present invention is to provide a fuel injection valve configured to suppress bouncing of a valve element that is caused as a result of the valve element being rendered elastic when the valve element collides with a valve seat. The fuel injection valve of the present invention includes the valve element configured to come into contact with the valve seat for closing an injection hole and to separate from the valve seat for unclosing the injection hole, an elastic member urging the valve element toward the valve seat, a movable iron core disposed to be in and out of contact with the valve element, a fixed iron core disposed to be opposed to the movable iron core, and a coil configured to generate electromagnetic force for moving the movable iron core.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: August 13, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akiyasu Miyamoto, Motoyuki Abe, Yoshihito Yasukawa, Takao Miyake, Akira Iizuka, Kiyotaka Ogura
  • Publication number: 20190211767
    Abstract: An object is to suppress an inclination of a waveform indicating an injection quantity with respect to an injection pulse particularly when a lift amount of a valve body is small and an injection pulse width is short, thereby improving control accuracy of the injection quantity of a fuel injection device. Thus, a control device for controlling a fuel injection device, which includes a valve body, a solenoid, and a movable element to open the valve body, is provided with a control unit that controls a drive voltage or a drive current to be applied to the solenoid, in which the control unit controls the drive current such that the drive current to be supplied to the solenoid decreases from a maximum drive current after the maximum drive current is supplied to the solenoid and before the valve body starts to open.
    Type: Application
    Filed: July 7, 2017
    Publication date: July 11, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Takao MIYAKE, Akiyasu MIYAMOTO, Takatoshi IIZUKA, Kiyotaka OGURA
  • 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: 10280886
    Abstract: An object of the present invention is to provide a fuel injection valve which has a structure where failure hardly occurs in a valve member and a peripheral member thereof at the time of press-fitting of a fixed core. The present invention provides a fuel injection valve that includes: a valve member 114A; an anchor 102 which is relatively displaceable with respect to the valve member 114A; a fixed core 107 in which a through-hole 107A is formed; a gap forming member 133 which forms a gap between an engagement portion 129B on the valve member side and an engagement portion 102D on the anchor side; and a biasing spring 134 which biases the gap forming member 133 in a valve closing direction. The engagement portions 102D and 129B are provided in both the anchor 102 and the valve member 114A so as to be engaged with each other when the anchor 102 is displaced in a valve opening direction with respect to the valve member 114A, thereby regulating the displacement of the anchor 102 in the valve opening direction.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: May 7, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Masashi Sugaya, Kiyotaka Ogura, Takao Miyake, Yoshihito Yasukawa, Ryo Kusakabe, Atsushi Nakai
  • Patent number: 10267283
    Abstract: A solenoid valve provided with a valve element that abuts against and separates from a valve seat to seal fuel; a movable iron core capable of being separated from the valve element; and a fixed iron core arranged opposed to the movable iron core. The solenoid valve also includes: a first spring member that energizes the valve element toward a side of the valve seat; a second spring member that energizes the movable iron core toward the fixed iron core; and a stopper part disposed on the side of the valve seat with respect to the movable iron core, and arranged with the movable iron core via a gap in a displacement direction in a valve closed state. The gap is set so the movable iron core collides with the stopper part when being displaced in the valve closing direction after the valve element is opened.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: April 23, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshihito Yasukawa, Akiyasu Miyamoto, Takao Miyake, Takatoshi Iizuka, Masashi Sugaya, Kiyotaka Ogura, Motoyuki Abe
  • Publication number: 20190040827
    Abstract: Provided is a fuel injection device that can secure strength capable of withstanding high fuel pressure. In a fuel injection device in which a fuel boundary includes two or more components, two components are press-fitted with an inner diameter and an outer diameter and are brought into contact at a butting surface, abutting welding is performed from a direction nearly parallel to the butting surface, an inner diameter side corner portion of the butting surface of a component to be fitted and press-fitted on an inner diameter side is chamfered longer in a direction perpendicular to the butting surface to increase a welding coupling length than a butting length, welding coupling length is less than welding depth, weld penetration depth is not less than material thickness, and the center of the weld is on a base material side, the outer diameter of which is larger than a joining face.
    Type: Application
    Filed: January 19, 2017
    Publication date: February 7, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takao MIYAKE, Kiyotaka OGURA, Masashi SUGAYA, Takumi TAKAHASHI
  • Patent number: 10197028
    Abstract: A fuel injector is provided. A movable iron core is provided relatively displaceable to a valve body. A fixed iron core is opposed to the movable iron core. A first spring member energizes the valve body in a valve closing direction. A second spring member energizes the movable iron core in a valve closing direction. Contact portions are in contact with each other in a case where the movable iron core displaces in a valve opening direction with respect to the valve body. A gap is formed between the contact portions in a valve closing state. In a state in which the movable iron core and the valve body move in different directions after the movable iron core collides with the fixed iron core while a valve is opened, a spring force is not applied between the movable iron core and the valve body.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: February 5, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD
    Inventors: Yoshihito Yasukawa, Takao Miyake, Atsushi Nakai, Masashi Sugaya, Akiyasu Miyamoto, Kiyotaka Ogura, Motoyuki Abe