Patents by Inventor Toyohei Nakajima

Toyohei Nakajima 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 gas recirculation control system having variable valve lift correcting speed for exhaust gas recirculation valve
    Patent number: 4448177
    Abstract: An exhaust gas recirculation control system which is adapted to control the valve opening of the exhaust gas recirculation valve so as to minimize the difference between a detected value of the valve opening of the above value and a command value determined as a function of operating conditions of the engine. The valve opening is corrected at a higher speed when the above difference has a larger absolute value, and at a lower speed when the difference has a smaller absolute value, to ensure prompt and accurate control of the exhaust gas recirculation quantity.
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: May 15, 1984
    Assignee: Honda Motor Co., Ltd.
    Inventors: Shumpei Hasegawa, Takashi Koumura, Toyohei Nakajima, Junichi Miyake, Junichi Kimura