Patents Assigned to Mitsubishi Denki Kabushiki Kaisha and NGK Spark Plug Co., Ltd.
  • Method of sensing air-to-fuel ratio sensor of an engine
    Patent number: 4657640
    Abstract: A method to accurately sense the stoichiometric air-to-fuel (A/F) ratio by aintaining the electromotive force of an oxygen sensor at a predetermined value of about 100 mV and using an oxygen concentration measuring device of the solid electrolyte oxygen pumping type.
    Type: Grant
    Filed: August 28, 1985
    Date of Patent: April 14, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha and NGK Spark Plug Co., Ltd.
    Inventors: Yoshiaki Asayama, Seiya Kominami