Emission Control Systems - Honda LEAD 110 2009 Service Manual

GENERAL INFORMATION

EMISSION CONTROL SYSTEMS

SOURCE OF EMISSIONS
The combustion process produces carbon monoxide, oxides of nitrogen and hydrocarbons. Control of hydrocarbons and
oxides of nitrogen is very important because, under certain conditions, they react to form photochemical smog when
subjected to sunlight. Carbon monoxide does not react in the same way, but it is toxic.
Honda Motor Co., Ltd. utilizes various systems to reduce carbon monoxide, oxides of nitrogen and hydrocarbons.
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 crankcase breather hose, air cleaner connecting hose and
throttle body.
THROTTLE BODY
1-30
CRANKCASE
BREATHER HOSES
PCV SOLENOID
VALVE
AIR CLEANER
CONNECTING HOSE
FRESH AIR
BLOW-BY GAS