EMISSION CONTROL SYSTEM GENERAL


  1. OUTLINE


    1. Exhaust Emission Control System


      1. Three-Way Catalysts (TWCs) are used to reduce emissions in the exhaust gas.

      2. Based on the signals from the air fuel ratio sensor and oxygen sensor, the ECM controls the fuel injection volume in order to optimize the emissions in the exhaust gas.

    2. Evaporative Emission Control System


      1. On the models for Korea, the evaporative emission control system prevents the fuel vapors created in the fuel tank from being released directly into the atmosphere. This system has the following controls:


        • Purge flow control

        • Refueling vapor recovery

        • Evaporative emission (EVAP) leak check

      2. Except on the models for Korea, the ECM controls the purge flow of evaporative emissions (HC) in the charcoal canister assembly in accordance with engine conditions.