Patents by Inventor Shigemasa Shimojo

Shigemasa Shimojo 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).

  • Purification apparatus of engine exhaust gas and method for purification of exhaust gas
    Patent number: 9334822
    Abstract: The first target A/F directing toward a richer side from the initial target A/F to the theoretical A/F is calculated; and the first estimated catalyst's oxygen amount is calculated based on the detected A/F and the theoretical A/F. Until the first estimated catalyst's oxygen amount reaches the first target catalyst's oxygen amount, calculations of the first target A/F and of the first estimated catalyst's oxygen amount continue. After the first estimated catalyst's oxygen amount reaches the first target catalyst's oxygen amount, the second target A/F directing toward a richer side from the theoretical A/F to the final target A/F is calculated; and the second estimated catalyst's oxygen amount is calculated based on the detected A/F and the final target A/F. Until the second estimated catalyst's oxygen amount reaches the second target catalyst's oxygen amount, calculations of the second target A/F and of the second estimated catalyst's oxygen amount continue.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: May 10, 2016
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Shigemasa Shimojo, Masayuki Tani
  • PURIFICATION APPARATUS OF ENGINE EXHAUST GAS AND METHOD FOR PURIFICATION OF EXHAUST GAS
    Publication number: 20150204260
    Abstract: The first target A/F directing toward a richer side from the initial target A/F to the theoretical A/F is calculated; and the first estimated catalyst's oxygen amount is calculated based on the detected A/F and the theoretical A/F. Until the first estimated catalyst's oxygen amount reaches the first target catalyst's oxygen amount, calculations of the first target A/F and of the first estimated catalyst's oxygen amount continue. After the first estimated catalyst's oxygen amount reaches the first target catalyst's oxygen amount, the second target A/F directing toward a richer side from the theoretical A/F to the final target A/F is calculated; and the second estimated catalyst's oxygen amount is calculated based on the detected A/F and the final target A/F. Until the second estimated catalyst's oxygen amount reaches the second target catalyst's oxygen amount, calculations of the second target A/F and of the second estimated catalyst's oxygen amount continue.
    Type: Application
    Filed: April 26, 2013
    Publication date: July 23, 2015
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Shigemasa Shimojo, Masayuki Tani