EMISSION CONTROL SYSTEM


  1. OUTLINE


    1. Exhaust Emission Control System


      1. A Three-Way Catalytic converter (TWC) is used in the front exhaust pipe assembly.

      2. The ECM performs the air fuel ratio feedback control based on signals from the oxygen sensor and the No. 2 oxygen sensor, and controls the fuel injection amount so that the air fuel ratio comes close to the stoichiometric air fuel ratio at which the highest purifying efficiency of CO, HC and NOx is obtained.

      3. The oxygen sensor heater control, which maintain the temperature of the respective sensors at an appropriate level, is used to improve the detection accuracy of oxygen concentration in exhaust gas.

    2. Blowby Gas Ventilation System


      1. A blowby gas ventilation system, which efficiently ventilates blowby gas containing HC from the crankcase, is used.

    3. Evaporative Emission Control System


      1. An evaporative emission control, which regulates the purge flow of evaporative emission (HC) into the charcoal canister in accordance with the engine conditions, is used.