Patents by Inventor Hitoshi Takikawa

Hitoshi Takikawa 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).

  • Engine system and method for controlling same
    Patent number: 10648401
    Abstract: In an engine system 10 having a high-pressure stage turbocharger 11 and a low-pressure stage turbocharger 12 provided in series, a control device 40 is configured to perform control such that when switching from multi-stage supercharging Cm to single-stage supercharging Cs, after only the exhaust bypass valve 23 is opened, and thereafter, an intake bypass valve 21 is opened later than at a timing at which the exhaust bypass valve 23 is opened.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: May 12, 2020
    Assignee: ISUZU MOTORS LIMITED
    Inventors: Motoki Mitsuyama, Hirofumi Hashimoto, Hotaka Saitou, Hitoshi Takikawa
  • ENGINE SYSTEM AND METHOD FOR CONTROLLING SAME
    Publication number: 20190048788
    Abstract: In an engine system 10 having a high-pressure stage turbocharger 11 and a low-pressure stage turbocharger 12 provided in series, a control device 40 is configured to perform control such that when switching from multi-stage supercharging Cm to single-stage supercharging Cs, after only the exhaust bypass valve 23 is opened, and thereafter, an intake bypass valve 21 is opened later than at a timing at which the exhaust bypass valve 23 is opened.
    Type: Application
    Filed: February 2, 2017
    Publication date: February 14, 2019
    Inventors: Motoki MITSUYAMA, Hirofumi HASHIMOTO, Hotaka SAITOU, Hitoshi TAKIKAWA
  • Secondary air supply system and vehicle
    Patent number: 8014931
    Abstract: A secondary air supply system includes a CPU, a first air supply pipe, a second air supply pipe, a first shut-off valve, and a second shut-off valve. First ends of the first air supply pipe and the second air supply pipe are connected to an air cleaner box and the other ends thereof are connected to an exhaust port. The CPU controls opening/closing of the first shut-off valve and the second shut-off valve based on a state of an engine. The first shut-off valve and the second shut-off valve are selectively opened by the CPU, so that air in the air cleaner box is supplied to the exhaust port through the first air supply pipe and/or the second air supply pipe.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: September 6, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yuuji Araki, Masaki Torigoshi, Hiroki Tanabe, Hitoshi Takikawa
  • SECONDARY AIR SUPPLY SYSTEM AND VEHICLE
    Publication number: 20090171551
    Abstract: A secondary air supply system includes a CPU, a first air supply pipe, a second air supply pipe, a first shut-off valve, and a second shut-off valve. First ends of the first air supply pipe and the second air supply pipe are connected to an air cleaner box and the other ends thereof are connected to an exhaust port. The CPU controls opening/closing of the first shut-off valve and the second shut-off valve based on a state of an engine. The first shut-off valve and the second shut-off valve are selectively opened by the CPU, so that air in the air cleaner box is supplied to the exhaust port through the first air supply pipe and/or the second air supply pipe.
    Type: Application
    Filed: November 21, 2008
    Publication date: July 2, 2009
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Yuuji ARAKI, Masaki TORIGOSHI, Hiroki TANABE, Hitoshi TAKIKAWA