EMISSION CONTROL SYSTEM


  1. OUTLINE


    1. Exhaust Emission Control System


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

      2. The exhaust manifold converter sub-assembly is positioned directly below the turbocharger sub-assembly to enhance TWC warm-up performance.

      3. Precise air fuel ratio control is made possible by positioning the air fuel ratio sensor upstream of the TWC of the exhaust manifold converter sub-assembly, and positioning the heated oxygen sensor in the center exhaust pipe assembly.

      4. Based on the signals from the air fuel ratio sensor and heated oxygen sensor, the ECM controls the fuel injection volume in order to optimize exhaust gas 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 canister stores the fuel vapor that has been created in the fuel tank assembly.

      3. This system consists of a purge VSV, canister and ECM.

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

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

      6. A check valve is used between the purge VSV and intake port to prevent intake air from flowing back toward the canister due to the turbo pressure.