7EMISSION CONTROL SYSTEMS
2EMISSION CONTROL SYSTEMS
SH010A1-E
(Not all models)
Depending upon the market for which
the vehicle is destined, the emission control system will comprise one or more of the following emission control devices.
(1) Crankcase emission control sys-
tem
(2) Evaporative emission control sys- tem
(3) Exhaust emission control system
In order that the proper functioning of
the emission control systems may be ensured, it is recommended that the vehicle is inspected and maintained by an Hyundai authorised repairer inaccordance with the maintenance schedule in this manual. SH010B1-E
1. Crankcase Emission Control
System
The positive crankcase ventilation
system is employed to prevent air pollution caused by blow-by gasesbeing emitted from the crankcase by introducing fresh air to the crankcase through the air cleaner where this mixeswith blow-by gases and then passes through the PCV valve into the intake manifold from where it subsequentlyenters the combustion chamber and is burned.
SH010C1-E
2. Evaporative Emission Control
System
The Evaporative Emission Control Sys-
tem is designed to prevent fuel vapours from escaping into the atmosphere through the fuel tank ventilation sys- tem. Whilst the engine is not running, fuel
vapours generated inside the fuel tankare absorbed and stored in a charcoal canister. When the engine is started, the vapours
stored in the canister are drawn intothe induction system through the purge control solenoid valve and are subse-quently burned. The purge control solenoid valve is
controlled by the ECU; when the en- gine coolant temperature is low or the engine is idling, the purge control valveis closed and fuel vapours remain stored in the canister. Under normal running conditions when the engine iswarm, the valve opens and the vapours are drawn into the inlet tract and sub- sequently burned in the combustionchamber.
SH010D1-E
3. Exhaust Emission Con Trol
System
The exhaust emission control system
is a highly effective system whichcontrols exhaust emission whilst main-taining good vehicle performance.
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