GENERAL INFORMATION (EVAPORATIVE EMISSION CONTROL
SYSTEM)
The evaporative
emission control system prevents fuel vapours generated in the fuel tank
from escaping into the atmosphere.
Fuel vapours from the fuel tank
flow through the fuel tank pressure control valve and vapour pipe/hose
to be stored temporarily in the canister.
When driving the vehicle,
fuel vapours stored in the canister flow through the purge control
solenoid valve and purge port and go into the intake manifold to be sent
to the combustion chamber.
When the engine coolant temperature is low
or when the intake air quantity is small (when the engine is at idle,
for example), the engine control unit turns the purge solenoid off to
shut off the fuel vapour flow to the intake manifold.
This does not
only insure the driveability when the engine is cold or running under
low load but also stabilize the emission level.
SYSTEM DIAGRAM
![](../../../img/17/AK302829AB00ENG.png)