Patents by Inventor Kentarou Shiga

Kentarou Shiga 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).

  • Direct injection engine
    Patent number: 6543410
    Abstract: In a direct injection engine capable of reducing an amount of NOx discharged as much as possible, realizing EGR in a large amount, and enlarging a stable burning limit, fuel injection valves for directly injecting fuel into combustion chambers are arranged, ignition plugs are provided in the combustion chambers to face the same, intake ports for generating a tumble gas flow in the combustion chambers are provided. The intake ports are compartmented by partitions into high velocity port portions having a high flow velocity of intake air and low velocity port portions having a low flow velocity of intake air, passage valves for opening and closing the port portions are arranged near upstream ends of the low velocity port portions, and an EGR passage for introducing an EGR gas is connected to the low velocity port portions.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: April 8, 2003
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Yoshiyuki Yoshida, Hidefumi Iwaki, Toshio Hori, Kentarou Shiga, Yoshikuni Kurashima
  • Direct injection engine
    Publication number: 20020011234
    Abstract: In a direct injection engine capable of reducing an amount of NOx discharged as much as possible, realizing EGR in a large amount, and enlarging a stable burning limit, fuel injection valves for directly injecting fuel into combustion chambers are arranged, ignition plugs are provided in the combustion chambers to face the same, intake ports for generating a tumble gas flow in the combustion chambers are provided. The intake ports are compartmented by partitions into high velocity port portions having a high flow velocity of intake air and low velocity port portions having a low flow velocity of intake air, passage valves for opening and closing the port portions are arranged near upstream ends of the low velocity port portions, and an EGR passage for introducing an EGR gas is connected to the low velocity port portions.
    Type: Application
    Filed: February 23, 2001
    Publication date: January 31, 2002
    Applicant: Hitachi, LTD. and Hitachi Car Engineering co., LTD
    Inventors: Yoshiyuki Yoshida, Hidefumi Iwaki, Toshio Hori, Kentarou Shiga, Yoshikuni Kurashima