Emission Control Systems - Honda GoldWing GL1500 2000 Owner's Manual

Emission Control Systems
Source of Emissions
The combustion process produces carbon monoxide and
hydrocarbons. Control of hydrocarbons is very important
because, under certain conditions, they react to fonn
photochemical smog when subjected to sunlight. Carbon
monoxide does not react in the same way, but it is toxic.
Honda Motor Co., Ltd. utilizes a secondary air supply system
to reduce carbon monoxide and hydrocarbons.
Exhaust Emission Contfol System (USA only)
The exhaust emission comrol system consists of a secondary
air supply system which introduces fthered air into the exhaust
gases in the exhaust
port.
No adjustments
10
this system should
be made although periodic inspection of the components is
recommended.
Air Supply System
A secondary air supply system helps improve emission
perfonnance.
Evaporative Emission Control System (California only)
This motorcycle complies with the requirements of the
California Air Resources Board (CARB) evaporative emission
regulations. Fuel vapor from the fuel tank and carburetor is
directed into the evap canister and evap storage element where
it is adsorbed and stored while the engine is stopped. When the
engine is running and the evap purge control valve is open,
fuel vapor in the evap canister and evap storage element is
drawn into the engine through the carburetor.
Crankcase Emission Control System
The engine is equipped with a closed crankcase system to
prevent discharging crankcase emissions into the atmosphere.
Blow-by gas is returned to the combustion chamber through
the air cleaner and the carburetor.
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