Honda Civic Hybrid Manual page 321

07/08/22 17:57:09 32SND620_321
Emissions Controls
For Korean model
The burning of petrol in your vehicle's
engine produces several byproducts.
Some of these are carbon monoxide
(CO), oxides of nitrogen (NOx), and
hydrocarbons (HC). Petrol
evaporating from the tank also
produces hydrocarbons. Controlling
the production of NOx, CO, and HC
is important to the environment.
Under certain conditions of sunlight
and climate, NOx and HC react to
form photochemical ''smog.'' Carbon
monoxide does not contribute to
smog creation, but it is a poisonous
gas.
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Technical Information
Crankcase Emissions Control
System
Your vehicle has a positive
crankcase ventilation system. This
keeps gasses that build up in the
engine's crankcase from going into
the atmosphere. The positive
crankcase ventilation valve routes
them from the crankcase back to the
intake manifold. They are then
drawn into the engine and burned.
Evaporative Emissions Control
System
As petrol evaporates in the fuel tank,
an evaporative emissions control
canister filled with charcoal adsorbs
the vapour. It is stored in this
canister while the engine is off. After
the engine is started and warmed up,
the vapour is drawn into the engine
and burned during driving.
Onboard Refueling Vapour
Recovery
The onboard refueling vapour
recovery (ORVR) system captures
the fuel vapours during refueling.
The vapours are adsorbed in a
canister filled with activated carbon.
While driving, the fuel vapours are
drawn into the engine and burned off.