EMISSION CONTROL SYSTEM GENERAL


  1. OUTLINE


    1. Exhaust Emission Control System


      1. Three-Way Catalytic converters (TWCs) are used in order to reduce exhaust emissions.

      2. The ECM controls fuel injection volume based on the signals from the air-fuel ratio sensor and heated oxygen sensor, optimizing the exhaust emissions.

    2. Evaporative Emission Control System


      1. The evaporative emission control system prevents the fuel vapor that is created in the fuel tank assembly from being released directly into the atmosphere.

      2. The charcoal canister assembly stores the fuel vapor that has been created in the fuel tank assembly.

      3. This system consists of an purge VSV, charcoal canister assembly, refueling valve, and ECM.

      4. The ECM controls the EVAP valve in accordance with the driving conditions in order to direct the fuel vapor into the engine, where it is burned.

      5. An air filter is provided on the fresh air line. This air filter is maintenance-free.

  2. MAJOR DIFFERENCE


    1. The new models have been modified from the previous models as shown below:


      1. The catalyst volume, cell density, wall thickness and structure of the TWCs have been changed to conform to EURO V.