Patents by Inventor Ryo KUSAKABE
Ryo KUSAKABE 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).
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Patent number: 9726127Abstract: A fuel injection valve includes a valve body, a coil, an inner fixed iron core that is arranged on an inner peripheral side of the coil, and an outer fixed iron core that is arranged on an outer peripheral side of the coil. The fuel injection valve also includes a movable element that is configured to be attracted to the inner fixed iron core and the outer fixed iron core, wherein the movable element is configured to be separable from the valve body and is configured to move the valve body.Type: GrantFiled: November 30, 2016Date of Patent: August 8, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yoshihito Yasukawa, Hideharu Ehara, Tohru Ishikawa, Motoyuki Abe, Ryo Kusakabe
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Publication number: 20170218876Abstract: A method for detecting variations between the quantities of fuel injected into cylinders by fuel injection devices and correcting the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor includes a drive device for fuel injection control, wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.Type: ApplicationFiled: April 22, 2015Publication date: August 3, 2017Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Ryo KUSAKABE, Motoyuki ABE, Toshihiro AONO, Takashi OKAMOTO
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Patent number: 9714626Abstract: An object of this disclosure is to provide a fuel injection device that can reliably detect an operation timing of a valve body, that is, a valve opening timing with high accuracy. The current of an electromagnetic valve reaches I2 at time t3, an FET 201 and an FET 221 are turned on, and a battery voltage VB is applied to the electromagnetic valve until time t5 is reached. The amount of displacement of the valve body reaches a target amount of control lift at time t4 between time t3 and time t5, that is, a movable core 304 comes into contact with a fixed core 301. The detection of the valve opening timing is performed during the period from time t3 to time t5.Type: GrantFiled: January 24, 2014Date of Patent: July 25, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Ayumu Hatanaka, Ryo Kusakabe, Motoyuki Abe, Toshihiro Aono, Teppei Hirotsu, Hideyuki Sakamoto, Takao Fukuda, Hideharu Ehara, Masahiro Toyohara, Akira Nishioka, Toshio Hori, Kiyoshi Aiki
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Publication number: 20170152803Abstract: In a drive unit of a fuel injection device, an electric current is supplied to the fuel injection device by applying a high voltage to the fuel injection device from a high voltage source whose voltage is boosted to a voltage higher than a battery voltage at the time of opening a valve of the fuel injection device. Thereafter, the electric current supplied to the fuel injection device is lowered to a current value at which a valve element cannot be held in a valve open state by stopping the applying of the high voltage from the high voltage source. Thereafter, in a stage where a supply current is switched to a hold current, another high voltage is applied to the fuel injection device from the high voltage source.Type: ApplicationFiled: February 13, 2017Publication date: June 1, 2017Applicant: Hitachi Automotive Systems, Ltd.Inventors: RYO KUSAKABE, Motoyuki Abe, Hideharu Ehara, Tohru Ishikawa, Takuya Mayuzumi, Kenji Hiraku
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Publication number: 20170082078Abstract: A fuel injection valve includes a valve body, a coil, an inner fixed iron core that is arranged on an inner peripheral side of the coil, and an outer fixed iron core that is arranged on an outer peripheral side of the coil. The fuel injection valve also includes a movable element that is configured to be attracted to the inner fixed iron core and the outer fixed iron core, wherein the movable element is configured to be separable from the valve body and is configured to move the valve body.Type: ApplicationFiled: November 30, 2016Publication date: March 23, 2017Inventors: Yoshihito YASUKAWA, Hideharu EHARA, Tohru ISHIKAWA, Motoyuki ABE, Ryo KUSAKABE
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Patent number: 9593657Abstract: In a drive unit of a fuel injection device, an electric current is supplied to the fuel injection device by applying a high voltage to the fuel injection device from a high voltage source whose voltage is boosted to a voltage higher than a battery voltage at the time of opening a valve of the fuel injection device. Thereafter, the electric current supplied to the fuel injection device is lowered to a current value at which a valve element cannot be held in a valve open state by stopping the applying of the high voltage from the high voltage source. Thereafter, in a stage where a supply current is switched to a hold current, another high voltage is applied to the fuel injection device from the high voltage source.Type: GrantFiled: August 8, 2011Date of Patent: March 14, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Ryo Kusakabe, Motoyuki Abe, Hideharu Ehara, Tohru Ishikawa, Takuya Mayuzumi, Kenji Hiraku
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Publication number: 20170067430Abstract: An electromagnetic fuel injection valve includes a valve element, a movable element, a magnetic core, and a coil. The movable element includes an inner movable element that faces a radially inner part of the magnetic attractive surface of the magnetic core in a moving direction of the valve element. The inner movable element is biased in a valve closing direction by a first spring. The movable element also includes an outer movable element that faces a radially outer part of the magnetic attractive surface of the magnetic core in the moving direction of the valve element. The outer movable element biased in a valve opening direction by a second spring.Type: ApplicationFiled: November 18, 2016Publication date: March 9, 2017Inventors: Motoyuki ABE, Ryo KUSAKABE, Hideharu EHARA, Yoshihito YASUKAWA
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Patent number: 9541046Abstract: A fuel injection valve having a variable stroke mechanism is constructed. A valve body provided to be slidable; a first movable element for cooperating with the valve body; an inner fixed iron core provided at a position to oppose a second movable element; an outer fixed iron core; and a coil are included. A lift amount of the second movable element is set larger than a lift amount of the first movable element, and a portion of the second movable element is projected into the first movable element. In this way, large and small lifts are constituted by using a difference between magnetic attractive forces that are generated in the first movable element and the second movable element by a current supplied to the coil.Type: GrantFiled: January 10, 2014Date of Patent: January 10, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yoshihito Yasukawa, Hideharu Ehara, Tohru Ishikawa, Motoyuki Abe, Ryo Kusakabe
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Patent number: 9528482Abstract: Provided is an electromagnetic fuel injection valve in which in both operations of opening and closing a valve, a movable element is made to free run before a valve element starts to operate, and bounding motion of the movable element occurring at the time of the valve opening operation is reduced, thereby balancing improvement of responsiveness and improvement of stability of operation. There are equipped with: a first movable element 105, which is biased by a first spring 106 biasing in a valve closing direction, as a movable element which opens and closes a valve when being attracted by a magnetic core 109 of the electromagnetic fuel injection valve; and a second movable element 104 biased toward the magnetic core 109 by a second spring 112 biasing in a valve opening direction.Type: GrantFiled: June 19, 2013Date of Patent: December 27, 2016Assignee: Hitachi Automotive Systems, Ltd.Inventors: Motoyuki Abe, Ryo Kusakabe, Hideharu Ehara, Yoshihito Yasukawa
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Publication number: 20160237937Abstract: An object of the invention is to provide a drive device of a fuel injection device which can increase the accuracy in an injected fuel injection amount by combining the fuel injections from a plurality of injection pulse widths. In the drive device of the fuel injection device which has a function of driving the fuel injection device such that the fuel injection is performed plural times in one combustion cycle, the fuel injection device is driven such that a fuel injection at a target opening level in which a valve element or a movable element of the fuel injection device reaches a regulation member and a fuel injection at an intermediate opening level in which the valve element does not reach the regulation member are included in the plural times of division injections performed in one combustion cycle.Type: ApplicationFiled: June 16, 2014Publication date: August 18, 2016Inventors: Ryo KUSAKABE, Toshihiro AONO, Motoyuki ABE, Takuya MAYUZUMI, Masahiro TOYOHARA, Takashi OKAMOTO, Osamu MUKAIHARA, Shinji NAKAGAWA, Yusuke KIHARA
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Publication number: 20160230722Abstract: A method of controlling a fuel injection device that can control a small amount of injection is provided. A fuel injection device for use in an internal combustion engine, includes: a valve body that can open and close a fuel passage, a needle that transfers a force with the valve body, and executes valve opening/closing operation, and an electromagnet that includes a coil and a magnetic core provided as a driver for driving the needle, and a cylindrical nozzle holder disposed on an outer periphery of the magnetic core and the needle, in which a current is supplied to the coil to exert a magnetic attractive force between the magnetic core and the needle to open the valve body.Type: ApplicationFiled: April 21, 2016Publication date: August 11, 2016Inventors: Ryo KUSAKABE, Motoyuki ABE, Yoshihito YASUKAWA, Noriyuki MAEKAWA, Takuya MAYUZUMI, Tohru ISHIKAWA
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Publication number: 20160177855Abstract: A drive device capable of detecting individual variations of an injection quantity of a fuel injection device of each cylinder and adjusting a current waveform provided to an injection pulse width and a solenoid such that the individual variations of the fuel injection devices are reduced. The fuel injection device in the present invention includes a valve body that closes a fuel passage by coming into contact with a valve seat and opens the fuel passage by separating from the valve seat and a magnetic circuit constructed of a solenoid, a fixed core, a nozzle holder, a housing, and a needle and when a current is supplied to the solenoid, a magnetic suction force acts on the needle and the needle has a function to open the valve body by colliding against the valve body after performing a free running operation and changes of acceleration of the needle due to collision of the needle against the valve body are detected by a current flowing through the solenoid.Type: ApplicationFiled: July 29, 2013Publication date: June 23, 2016Inventors: Ryo KUSAKABE, Motoyuki ABE, Ayumu HATANAKA, Toshihiro AONO, Teppei HIROTSU, Hideyuki SAKAMOTO, Masahiro TOYOHARA, Osamu MUKAIHARA, Takao FUKUDA, Yoshihito YASUKAWA, Akiyasu MIYAMOTO
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Patent number: 9347393Abstract: A method of controlling a fuel injection device that can control a small amount of injection is provided. A fuel injection device for use in an internal combustion engine, includes: a valve body that can open and close a fuel passage, a needle that transfers a force with the valve body, and executes valve opening/closing operation, and an electromagnet that includes a coil and a magnetic core provided as a driver for driving the needle, and a cylindrical nozzle holder disposed on an outer periphery of the magnetic core and the needle, in which a current is supplied to the coil to exert a magnetic attractive force between the magnetic core and the needle to open the valve body.Type: GrantFiled: June 19, 2012Date of Patent: May 24, 2016Assignee: Hitachi Automotive Systems, Ltd.Inventors: Ryo Kusakabe, Motoyuki Abe, Yoshihito Yasukawa, Noriyuki Maekawa, Takuya Mayuzumi, Tohru Ishikawa
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Publication number: 20160076498Abstract: Provided are an electromagnetic valve control unit and a fuel injection control device using the same that can precisely detect a change of an operating state of an electromagnetic valve, that is, a valve opening time or a valve closing time of the electromagnetic valve, precisely correct a drive voltage or a drive current applied to the electromagnetic valve, and appropriately control opening/closing of the electromagnetic valve, with a simple configuration. In an electromagnetic valve control unit for controlling opening/closing of an electromagnetic valve by a drive voltage and a drive current to be applied, the drive voltage and the drive current applied to the electromagnetic valve are corrected on the basis of a detection time of an inflection point from time series data of the drive voltage and the drive current when the electromagnetic valve is opened/closed.Type: ApplicationFiled: March 7, 2014Publication date: March 17, 2016Inventors: Toshihiro AONO, Motoyuki ABE, Ryo KUSAKABE, Teppei HIROTSU, Ayumu HATANAKA, Hideyuki SAKAMOTO, Takao FUKUDA, Masahiro TOYOHARA, Osamu MUKAIHARA
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Publication number: 20160025052Abstract: In an electromagnetic fuel injection which is structured such that both end surfaces of an inner circumferential iron core portion and an outer circumferential iron core portion face a movable iron core, and a non-magnetic portion made of a metal material is provided between both end surfaces, an object of the present invention is to realize a structure of the electromagnetic fuel injector in which a surface of a target object is unlikely to be affected by a heat treatment with the surface facing the movable iron core.Type: ApplicationFiled: January 27, 2014Publication date: January 28, 2016Inventors: Yoshihito YASUKAWA, Hideharu EHARA, Tohru ISHIKAWA, Kiyotaka OGURA, Motoyuki ABE, Ryo KUSAKABE, Akiyasu MIYAMOTO
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Publication number: 20150377176Abstract: An object of this disclosure is to provide a fuel injection device that can reliably detect an operation timing of a valve body, that is, a valve opening timing with high accuracy. The current of an electromagnetic valve reaches I2 at time t3, an FET 201 and an FET 221 are turned on, and a battery voltage VB is applied to the electromagnetic valve until time t5 is reached. The amount of displacement of the valve body reaches a target amount of control lift at time t4 between time t3 and time t5, that is, a movable core 304 comes into contact with a fixed core 301. The detection of the valve opening timing is performed during the period from time t3 to time t5.Type: ApplicationFiled: January 24, 2014Publication date: December 31, 2015Inventors: Ayumu HATANAKA, Ryo KUSAKABE, Motoyuki ABE, Toshihiro AONO, Teppei HIROTSU, Hideyuki SAKAMOTO, Takao FUKUDA, Hideharu EHARA, Masahiro TOYOHARA, Akira NISHIOKA, Toshio HORI, Kiyoshi AIKI
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Publication number: 20150354515Abstract: A fuel injection valve having a variable stroke mechanism is constructed. A valve body provided to be slidable; a first movable element for cooperating with the valve body; an inner fixed iron core provided at a position to oppose a second movable element; an outer fixed iron core; and a coil are included. A lift amount of the second movable element is set larger than a lift amount of the first movable element, and a portion of the second movable element is projected into the first movable element. In this way, large and small lifts are constituted by using a difference between magnetic attractive forces that are generated in the first movable element and the second movable element by a current supplied to the coil.Type: ApplicationFiled: January 10, 2014Publication date: December 10, 2015Inventors: Yoshihito YASUKAWA, Hideharu EHARA, Tohru ISHIKAWA, Motoyuki ABE, Ryo KUSAKABE
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Publication number: 20150267665Abstract: Provided is an electromagnetic fuel injection valve in which in both operations of opening and closing a valve, a movable element is made to free run before a valve element starts to operate, and bounding motion of the movable element occurring at the time of the valve opening operation is reduced, thereby balancing improvement of responsiveness and improvement of stability of operation. There are equipped with: a first movable element 105, which is biased by a first spring 106 biasing in a valve closing direction, as a movable element which opens and closes a valve when being attracted by a magnetic core 109 of the electromagnetic fuel injection valve; and a second movable element 104 biased toward the magnetic core 109 by a second spring 112 biasing in a valve opening direction.Type: ApplicationFiled: June 19, 2013Publication date: September 24, 2015Inventors: Motoyuki Abe, Ryo Kusakabe, Hideharu Ehara, Yoshihito Yasukawa
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Patent number: 8960157Abstract: The drive device is configured to, during a time interval between an earlier fuel injection (first fuel injection) and a later fuel injection (second fuel injection), supply an electromagnetic coil with an intermediate current at a voltage with a level of not opening the valve. Further, the drive device sets a voltage application for supplying the intermediate current to initiate before a valve closing in the earlier fuel injection and terminate before half a period of time between a first instant when the valve is closed in the earlier fuel injection and a second instant when a supply of a drive current for opening the valve is initiated in the later fuel injection.Type: GrantFiled: February 23, 2012Date of Patent: February 24, 2015Assignee: Hitachi Automotive Systems, Ltd.Inventors: Ryo Kusakabe, Motoyuki Abe, Hideharu Ehara, Tohru Ishikawa, Noriyuki Maekawa, Takuya Mayuzumi
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Publication number: 20130139791Abstract: In a drive unit of a fuel injection device, an electric current is supplied to the fuel injection device by applying a high voltage to the fuel injection device from a high voltage source whose voltage is boosted to a voltage higher than a battery voltage at the time of opening a valve of the fuel injection device. Thereafter, the electric current supplied to the fuel injection device is lowered to a current value at which a valve element cannot be held in a valve open state by stopping the applying of the high voltage from the high voltage source. Thereafter, in a stage where a supply current is switched to a hold current, another high voltage is applied to the fuel injection device from the high voltage source.Type: ApplicationFiled: August 8, 2011Publication date: June 6, 2013Inventors: Ryo Kusakabe, Motoyuki Abe, Hideharu Ehara, Tohru Ishikawa, Takuya Mayuzumi, Kenji Hiraku