Patents by Inventor Shinicihi Takeshima

Shinicihi Takeshima 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).

  • Exhaust purification method and exhaust purification apparatus of internal combustion engine
    Patent number: 7520126
    Abstract: In an internal combustion engine, an exhaust passage is provided with a NOx storing and decomposing catalyst (20). When burning fuel under a lean air-fuel ratio, the nitrogen monoxide is adsorbed by the NOx storing and decomposing catalyst (20) and disassociated. At this time, the disassociated oxygen is held in the form of oxygen ions O? on the NOx storing and decomposing catalyst (20). By making the air-fuel ratio rich and purging part of these oxygen ions O?, the remaining oxygen ions O? are also purged. Due to this, the NOx purification performance of the NOx storing and decomposing catalyst (20) is restored.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: April 21, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinicihi Takeshima, Toshiaki Tanaka, Tetsuya Yamashita
  • EXHAUST PURIFICATION METHOD AND EXHAUST PURIFICATION APPARATUS OF INTERNAL COMBUSTION ENGINE
    Publication number: 20060137328
    Abstract: In an internal combustion engine, an exhaust passage is provided with a NOx storing and decomposing catalyst (20). When burning fuel under a lean air-fuel ratio, the nitrogen monoxide is adsorbed by the NOx storing and decomposing catalyst (20) and disassociated. At this time, the disassociated oxygen is held in the form of oxygen ions O? on the NOx storing and decomposing catalyst (20). By making the air-fuel ratio rich and purging part of these oxygen ions O?, the remaining oxygen ions O? are also purged. Due to this, the NOx purification performance of the NOx storing and decomposing catalyst (20) is restored.
    Type: Application
    Filed: February 12, 2004
    Publication date: June 29, 2006
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinicihi Takeshima, Toshiaki Tanaka, Tetsuya Yamashita