EMISSION CONTROL SYSTEM


  1. FUNCTION OF MAIN COMPONETS


    1. The main components of the exhaust emission control system are as follows:

      Component Function
      ECM Determines an optimal fuel injection volume based on the signals from various sensors.
      TWC

      Oxidizes CO and HC in the exhaust gas and deoxidizes NOx at the same time, to purify them into CO2, H2O and N2.
      Air Fuel Ratio Sensor

      These sensors detect the oxygen concentration in the exhaust emissions by measuring the electromotive force which is generated in the sensor itself. For details, see 3ZR-FE ENGINE CONTROL Section.

      [SFI SYSTEM > AIR FUEL RATIO SENSOR AND HEATED OXYGEN SENSOR Click here ]
      Oxygen Sensor