Patents by Inventor Shirou Yamaoka

Shirou Yamaoka 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).

  • Patent number: 10774772
    Abstract: In view of the foregoing issues, an object of the present invention is to provide a vehicle control device that reduces the constraints of heat generation and charging time of a booster circuit, and decreases favorably the fuel consumption and exhaust emission of an engine. A vehicle control device installed in a vehicle, the device includes: a battery; a high-voltage battery that has a voltage higher than a voltage of the battery; and a fuel injection device that injects fuel into an internal combustion engine, wherein the vehicle control device includes a control unit that determines whether to supply a drive current to the fuel injection device by the battery or supply a drive current to the fuel injection device by the high-voltage battery, and controls the fuel injection device.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: September 15, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shirou Yamaoka, Ryo Kusakabe, Kiyotaka Ogura
  • 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: 10634083
    Abstract: The objective of the present invention is to correct deviation in the injection amount and changes in the injection timing when the voltage of a high-voltage source for a drive device decreases.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: April 28, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo Kusakabe, Tomoaki Horii, Shingo Kimura, Takaki Itaya, Mitsuru Nagase, Shirou Yamaoka
  • Patent number: 10450995
    Abstract: Provided is a control device for an internal combustion engine, the control device enabling the suppression of variations in the amount of fuel injected by injection while the boost voltage is charging, without offsetting the injection timing. A boost circuit (211) boosts a first voltage supplied from a battery (201), and supplies a boosted second voltage to a fuel injection device (214). Switches (212, 213) switch the second voltage supplied to the fuel injection device from the booster circuit on and off. Computation devices (204, 207) control the switches. Each computation device comprises: an estimation unit that, before the initial fuel injection in a combustion cycle, estimates the second voltage for all of the fuel injection times in the combustion cycle; and a correction unit that corrects the amount of fuel injected for each fuel injection time depending on the estimated second voltage.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: October 22, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shingo Kimura, Tomoaki Horii, Mitsuru Nagase, Shirou Yamaoka, Ryo Kusakabe, Takaki Itaya
  • Publication number: 20190085783
    Abstract: The objective of the present invention is to correct deviation in the injection amount and changes in the injection timing when the voltage of a high-voltage source for a drive device decreases.
    Type: Application
    Filed: November 20, 2018
    Publication date: March 21, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo KUSAKABE, Tomoaki HORII, Shingo KIMURA, Takaki ITAYA, Mitsuru NAGASE, Shirou YAMAOKA
  • Publication number: 20190040790
    Abstract: An object of the present invention is to provide a fuel injection device in which fuel sprays hardly adhere to an intake valve, a wall surface in an engine cylinder, or a piston.
    Type: Application
    Filed: January 10, 2017
    Publication date: February 7, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo KUSAKABE, Takuya WATAI, Shirou YAMAOKA, Kiyotaka OGURA
  • Patent number: 10161339
    Abstract: The objective of the present invention is to correct deviation in the injection amount and changes in the injection timing when the voltage of a high-voltage source for a drive device decreases.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: December 25, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo Kusakabe, Tomoaki Horii, Shingo Kimura, Takaki Itaya, Mitsuru Nagase, Shirou Yamaoka
  • Publication number: 20180306137
    Abstract: In view of the foregoing issues, an object of the present invention is to provide a vehicle control device that reduces the constraints of heat generation and charging time of a booster circuit, and decreases favorably the fuel consumption and exhaust emission of an engine. A vehicle control device installed in a vehicle, the device includes: a battery; a high-voltage battery that has a voltage higher than a voltage of the battery; and a fuel injection device that injects fuel into an internal combustion engine, wherein the vehicle control device includes a control unit that determines whether to supply a drive current to the fuel injection device by the battery or supply a drive current to the fuel injection device by the high-voltage battery, and controls the fuel injection device.
    Type: Application
    Filed: October 13, 2016
    Publication date: October 25, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shirou YAMAOKA, Ryo KUSAKABE, Kiyotaka OGURA
  • Publication number: 20180283306
    Abstract: The objective of the present invention is to correct deviation in the injection amount and changes in the injection timing when the voltage of a high-voltage source for a drive device decreases.
    Type: Application
    Filed: September 18, 2015
    Publication date: October 4, 2018
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo KUSAKABE, Tomoaki HORII, Shingo KIMURA, Takaki ITAYA, Mitsuru NAGASE, Shirou YAMAOKA
  • Publication number: 20180023503
    Abstract: Provided is a control device for an internal combustion engine, the control device enabling the suppression of variations in the amount of fuel injected by injection while the boost voltage is charging, without offsetting the injection timing. A boost circuit (211) boosts a first voltage supplied from a battery (201), and supplies a boosted second voltage to a fuel injection device (214). Switches (212, 213) switch the second voltage supplied to the fuel injection device from the booster circuit on and off. Computation devices (204, 207) control the switches. Each computation device comprises: an estimation unit that, before the initial fuel injection in a combustion cycle, estimates the second voltage for all of the fuel injection times in the combustion cycle; and a correction unit that corrects the amount of fuel injected for each fuel injection time depending on the estimated second voltage.
    Type: Application
    Filed: January 29, 2016
    Publication date: January 25, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shingo KIMURA, Tomoaki HORII, Mitsuru NAGASE, Shirou YAMAOKA, Ryo KUSAKABE, Takaki ITAYA
  • Publication number: 20180017005
    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: Application
    Filed: February 1, 2016
    Publication date: January 18, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo KUSAKABE, Takatoshi IIZUKA, Takao MIYAKE, Masashi SUGAYA, Kiyotaka OGURA, Shirou YAMAOKA
  • Publication number: 20180010547
    Abstract: The purpose of the present invention is to provide a control means which, with respect to injection control of a fuel injection valve, reduces deviation between an injection quantity of fuel injected by the fuel injection valve and a target value, the deviation being caused due to a pressure in a combustion chamber, as an injection timing in a compression stroke of an engine is retarded. The present invention pertains to a fuel injection valve that performs a plurality of injections in one engine cycle, and performs control in such a manner that injection pulse signals and are transmitted to a drive circuit, and from the drive circuit for the fuel injection valve that outputs drive current waveforms for fuel injection, the injection pulse signal in the compression stroke when the injection timing is retarded is shortened.
    Type: Application
    Filed: February 26, 2016
    Publication date: January 11, 2018
    Inventors: Takaki ITAYA, Ryo KUSAKABE, Shirou YAMAOKA, Kiyotaka OGURA
  • Patent number: 6880518
    Abstract: A first object of the invention is to reduce an exhaust gas in a lean burn area which is expanded by a supercharging, in a direct gasoline injection type internal combustion engine provided with a turbocharger. A second object of the invention is to prevent a knocking and a misfire at a time of self ignition combustion. The invention is used for the direct gasoline injection type internal combustion engine provided with the turbocharger. In order to achieve the first object, a combustion mode is switched from a stratified combustion mode to a self ignition combustion mode at a time when a suction pressure of the engine is equal to or more than an atmospheric pressure. Further, in order to achieve the second object, an ignition timing is set to a range between a top dead center and 10 degrees after the top dead center (0 to 10 (ATDC)) at a time of operating an engine in accordance with a self ignition combustion mode.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: April 19, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Takuya Shiraishi, Shirou Yamaoka, Noboru Tokuyasu, Minoru Ohsuga
  • Publication number: 20030217733
    Abstract: A first object of the invention is to reduce an exhaust gas in a lean burn area which is expanded by a supercharging, in a direct gasoline injection type internal combustion engine provided with a turbocharger. A second object of the invention is to prevent a knocking and a misfire at a time of self ignition combustion. The invention is used for the direct gasoline injection type internal combustion engine provided with the turbocharger. In order to achieve the first object, a combustion mode is switched from a stratified combustion mode to a self ignition combustion mode at a time when a suction pressure of the engine is equal to or more than an atmospheric pressure. Further, in order to achieve the second object, an ignition timing is set to a range between a top dead center and 10 degrees after the top dead center (0 to 10 (ATDC)) at a time of operating an engine in accordance with a self ignition combustion mode.
    Type: Application
    Filed: September 19, 2002
    Publication date: November 27, 2003
    Inventors: Takuya Shiraishi, Shirou Yamaoka, Noboru Tokuyasu, Minoru Ohsuga