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EMISSION CONTROL SYSTEMS
SOURCE OF EMISSIONS
The combustion process produces carbon monoxide (CO), oxides of nitrogen (NOx) and hydrocarbons (HC). The control of
hydrocarbons and oxides of nitrogen is very important because, under certain conditions, they react to form photochemical smog
when subject to sunlight. Carbon monoxide does not react in the same way, but it is toxic. Uncontrolled fuel evaporation also
releases hydrocarbons to the atmosphere.
Honda Motor Co., Ltd. utilizes various system to reduce carbon monoxide, hydrocarbons, and oxides of nitrogen.
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 throttle body.
FRESH AIR
BLOW-BY GAS
GENERAL INFORMATION
AIR CLEANER HOUSING
THROTTLE BODY
1-47
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