EMISSION CONTROL SYSTEMS 7
3
DH010B1-A
1.
ZH010C1-E
2. Evaporative Emission
Control System
JH010D1-E
3. Exhaust Emission Control
System
Crankcase Emission Control
System
The positive crankcase ventilation
system is employed to prevent air
pollution caused by blow-by gases
being emitted from the crankcase.
This system supplies fresh air to the
crankcase through the air cleaner.
Inside the crankcase, the fresh air
mixes with blow-by gases, then
passes through the PCV valve into
the intake system.
The Evaporative Emission Control
System is designed to prevent fuel
vapors from escaping into the atmo-
sphere.
This system helps control oxides of
nitrogen by recirculating a portion of
the exhaust gases into the intake
manifold, thereby reducing cylinder
combustion temperatures.
Canister
While the engine is inoperative, fuel
vapors generated inside the fuel tank
are absorbed and stored in the canis-
ter. When the engine is running, the
fuel vapors absorbed in the canister
are drawn into the induction system
through the purge control solenoid
valve.
Purge Control Solenoid Valve
The purge control solenoid valve is
controlled by the ECU; when the en-
gine coolant temperature is low, and
during idling, it closes, so that evapo-
rated fuel is not taken into the surge
tank. After engine warm-up, during
ordinary driving, it opens to introduce
evaporated fuel to the surge tank.
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5/31/04, 4:44 PM
| Categories | Hyundai Manuals, Hyundai Tucson Manuals |
|---|---|
| Download File |
|
| Document Type | Owners Manual |
| Language | English |
| Product Brand | Hyundai, Tucson |
| Document File Type | |
| Copyright | Attribution Non-commercial |
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