ABS Hyundai Accent 2006 Owner's Guide

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 con-trol 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 thevehicle is inspected and maintained by an authorized Hyundai dealer in accordance with the maintenanceschedule 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 gases being emitted from the crankcase byintroducing fresh air to the crankcase through the air cleaner where this mixes with blow-by gases and thenpasses through the PCV valve into the intake manifold from where it sub- sequently enters the combustionchamber and is burned.
SH010C1-E
2. Evaporative Emission
Control System
The Evaporative Emission Control
System is designed to prevent fuel vapours from escaping into the atmo- sphere through the fuel tank ventila-tion system. Canister
Fuel vapours generated inside the
fuel tank are absorbed and stored ina charcoal canister. When the engineis started, the vapours stored in the canister are drawn into the induction system through the purge control so-lenoid valve and are subsequently burned. Purge Control Solenoid Valve
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 valve is closed and fuel vapours re- main stored in the canister. Undernormal running conditions when the engine is warm, the valve opens and the vapours are drawn into the inlettract and subsequently burned in the combustion chamber.