__..--. -._ _^__. __--- -._ _..EMISSION CONTROL SYSTEMS
- Evaporative Emission Control Svsvem25-l 1
,VAPORATlVE EMISSION CON-
TROL SYSTEMIn order to prevent the escape of fuel vapor from the
fuel system into the atmosphere. the evaporative
emission control system consists of a charcoal
canister, a purge control solenoid valve, etc.
When the fuel vapors generated inside the fuel tank
fill the tank, they press and open the overfill limiter’s
valve and pass to the canister, where they are
absorbed into and accumulated by the charcoal.
Because the purge control solenoid valve is ON
(open) when the engine is running, as a
conse-
Non-TurboAir cleaner
Fuel injector
Canister
Charcoal
/Purge control tsolenoid valve r
RZSGAAB
quence of the purge air being taken in from the
canister in accordance with the intake negative
pressure (vacuum), the fuel vapors accumulated in
the canister are taken from the charcoal and are alsotaken into the intake manifold.
Note that the purge control solenoid valve is OFF
(closed) when the engine is cold and during idling,
and so fuel vapors are not taken into the intake
manifold at that time.
Overfill
limiter(Two-way valve)
Fuel check valveFilter
- Fuel vapor
*---- Purge air
25-12EMISSION CONTROL SYSTEMS- Evaporative Emisson Control System-
TurboPurge control valve
/Air cleaner
Canister
-Charcoal-ITurbo-
chargerPurge control
solenoid valve
Fuel check valve
Thermal expansion
Fuel gauge unit
Filter
- Fuel vapor
- - - - Purge air
BEMO211
%-E?”solenoidvalve
Charcoal -fuel tank
CANISTERWhile the engine is inoperative, fuel vapors generated
insidEthe fuel tank are absorbed and stored in the canister.
When the engine is running, the fuel vapors absorbed in
thfcanister are drawn into the throttle body through the
purgecontrol solenoid valve.
Atmosphere
L- Filter03Roo3E
