Honda PCX125 2011, Owner'S Manual

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191
Emission Control Systems
Technical Information
Evaporative Emission Control System Three-Way Catalytic Converter
This scooter complies with the
requirements of the California Air
Resources Board (CARB) evaporative
emission regulations. Fuel vapor from the
fuel tank is directed into the charcoal
canister and air cleaner where it is
adsorbed and stored while the engine is
stopped. When the engine is running and
the purge control solenoid valve is open,
fuel vapor in the charcoal canister and air
cleaner is drawn into the engine through
the throttle body.
The three-way catalytic converter is in the
exhaust system. Through chemical
reactions, they convert HC, CO, and NOx
in the engine’s exhaust to carbon dioxide
(CO ), dinitrogen (N ), and water vapor.
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