SFI SYSTEM


  1. CONSTRUCTION


    1. A planar type air fuel ratio sensor is used.

    2. The planar type air fuel ratio sensor uses alumina, which excels in heat conductivity and electrical insulation, to integrate a sensor element with a heater, thus improving the warm-up performance of the sensor.

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      *1 Alumina *2 Platinum Electrode
      *3 Sensor Element (Zirconia) *4 Heater
      *5 Atmosphere - -

    3. As illustrated below, a conventional heated oxygen sensor is characterized by a sudden change in its output voltage at the threshold of the stoichiometric air fuel ratio (14.7:1). In contrast, the air fuel ratio sensor data is approximately proportionate to the existing air fuel ratio. The air fuel ratio sensor converts the oxygen density into a voltage signal and sends it to the ECM. As a result, the detection precision of the air fuel ratio has been improved. Air fuel ratio sensor data can be viewed using the Global TechStream (GTS).

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