Patents by Inventor Eiichi Koujina

Eiichi Koujina 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).

  • Ignition timing controller for spark-ignition internal combustion engine using estimated cylinder wall temperature
    Patent number: 5150300
    Abstract: An ignition timing controller is furnished for use in a spark-ignition internal combustion engine. The controller includes a device for setting the ignition timing of the engine in accordance with the state of operation of the engine and another device for actuating an ignition system on the basis of the ignition timing set by the ignition timing setting device. The ignition timing setting device is constructed of a device for estimating the wall temperature of a combustion chamber of the engine from a variable, which indicates the quantity of combustion energy of the engine, and another device for calculating the ignition timing from the wall temperature of the combustion chamber estimated by the wall temperature estimating device.
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: September 22, 1992
    Assignee: Mitsubishi Jidosha Kogyo K.K.
    Inventors: Yoshiaki Danno, Kazuhide Togai, Hiromitsu Ando, Jun Takemura, Eiichi Koujina, Ichiyo Kojima
  • Method for determining combustion condition in spark ignition internal combustion engine and combustion condition control device
    Patent number: 4976241
    Abstract: A method and device for determining and controlling the condition of a spark ignition internal combustion engine involves detecting a physical value of combustion varying in association with combustion in the combustion chamber, then calculating the heat evolution rate from the physical value, and then determining the adjusting the combustion condition in dependence on the falling area of the heat evolution rate.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: December 11, 1990
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tetsuro Ishida, Yoshiaki Danno, Kazuhide Togai, Hiromitsu Ando, Daisuke Sanbayashi, Masato Yoshida, Kazuhiro Shiraishi, Tokihiro Tsukamoto, Jun Takemura, Eiichi Koujina