Patents by Inventor Takuo Nishi

Takuo Nishi 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).

  • Device for purifying the exhaust gases of diesel engines
    Patent number: 7316107
    Abstract: In a diesel engine provided with a diesel particulate filter 81 and an exhaust throttle valve 9, noise is decreased that is produced when the exhaust throttle valve is returned back to the fully opened state after a diesel particulate filter 81 has been regenerated by oxidizing and removing the particulate matter deposited thereon. The exhaust system of the diesel engine is equipped with the diesel particulate filter 81 and a catalyst 82 on the upstream thereof, and is further equipped with the exhaust throttle valve 9 on the downstream. The diesel particulate filter 81 is regenerated by operating the diesel engine in a state where the exhaust throttle valve 9 is opened to a small degree. When the regeneration has finished, the diesel engine is run at a decreased rotational speed and, thereafter, the exhaust throttle valve 9 is returned back to the fully opened state.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: January 8, 2008
    Assignee: Isuzu Motors Limited
    Inventors: Yoshitaka Aratsuka, Hirofumi Hashimoto, Takuo Nishi
  • Device for purifying the exhaust gases of diesel engines
    Publication number: 20050217255
    Abstract: In a diesel engine provided with a diesel particulate filter 81 and an exhaust throttle valve 9, noise is decreased that is produced when the exhaust throttle valve is returned back to the fully opened state after a diesel particulate filter 81 has been regenerated by oxidizing and removing the particulate matter deposited thereon. The exhaust system of the diesel engine is equipped with the diesel particulate filter 81 and a catalyst 82 on the upstream thereof, and is further equipped with the exhaust throttle valve 9 on the downstream. The diesel particulate filter 81 is regenerated by operating the diesel engine in a state where the exhaust throttle valve 9 is opened to a small degree. When the regeneration has finished, the diesel engine is run at a decreased rotational speed and, thereafter, the exhaust throttle valve 9 is returned back to the fully opened state.
    Type: Application
    Filed: March 29, 2005
    Publication date: October 6, 2005
    Applicant: Isuzu Motors Limited
    Inventors: Yoshitaka Aratsuka, Hirofumi Hashimoto, Takuo Nishi