Patents by Inventor Kenrou Nakashima

Kenrou Nakashima 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).

  • Gas engine with pre-combustion chamber
    Patent number: 6073605
    Abstract: This gas engine with pre-combustion chambers. effectively uses ejection energy of flames and air-fuel mixtures ejected from the pre-combustion chambers into the main combustion chambers to shorten the combustion duration and thereby enhance performance. Installed in the cylinder head at the central part of the cylinders are pre-combustion chamber structures. that form pre-combustion chambers; Combustion chamber structures are formed with communication port that communicate the pre-combustion chambers with the main combustion chambers. Control valves are provided to open and close the communication ports. The communication ports comprise main communication ports and sub-communication ports formed around the main communication ports. The sub-communication ports are formed in the combustion chamber structures so that they extend radially toward the cylinder periphery.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: June 13, 2000
    Assignee: Isuzu Ceramics Research Institute Co.
    Inventors: Hiroshi Matsuoka, Hideo Kawamura, Kenrou Nakashima
  • Gas engine with pre-combustion chamber
    Patent number: 5950593
    Abstract: This gas engine with pre-combustion chambers effectively uses ejection energy of flames and air-fuel mixtures ejected from the pre-combustion chambers into the main combustion chambers to shorten the combustion duration and thereby enhance performance. Installed in the cylinder head at the central part of the cylinders are pre-combustion chamber structures that form pre-combustion chambers. Combustion chamber structures are formed with communication port that communicate the pre-combustion chambers with the main combustion chambers. Control valves are provided to open and close the communication ports. The communication ports comprise main communication ports and sub-communication ports formed around the main communication ports. The sub-communication ports are formed in the combustion chamber structures so that they extend radially toward the cylinder periphery.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: September 14, 1999
    Assignee: Isuzu Ceramics Research Institute Co., Ltd.
    Inventors: Hiroshi Matsuoka, Hideo Kawamura, Kenrou Nakashima