ECU Hyundai Matrix 2003 Service Manual

EMISSION CONTROL SYSTEM 7-1
SH000A1-E
7. EMISSION
CONTROL SYSTEM
SH010A1-E EMISSION CONTROL SYSTEMS (Not all models) Depending upon the market for which the ve-hicle is destined, the emission control systemwill comprise one or more of the followingemission control devices. (1) Crankcase emission control system (2) Evaporative emission control system (3) Exhaust emission control system In order that the proper functioning of the emis- sion control systems may be ensured, it isrecommended that the vehicle is inspected andmaintained by an authorized Hyundai dealer inaccordance with the maintenance schedule inthis manual. SH010B1-E 1. CRANKCASE EMISSION CONTROL SYSTEM
The positive crankcase ventilation system is employed to prevent air pollution caused byblow-by gases being emitted from the crank-case by introducing fresh air to the crankcase through the air cleaner where this mixes withblow-by gases and then passes through thePCV valve into the intake manifold from whereit subsequently enters the combustion cham-ber and is burned.
SH010D1-E 3. EXHAUST EMISSION CONTROL SYSTEM The exhaust emission control system is a highlyeffective system which controls exhaust emis-sion while maintaining good vehicle perfor-mance.
SH010C1-E
2. EVAPORATIVE EMISSION
CONTROL SYSTEM
The Evaporative Emission Control System is designed to prevent fuel vapours from escap-ing into the atmosphere through the fuel tankventilation system.Whilst the engine is not running, fuel vapoursgenerated inside the fuel tank are absorbedand stored in a charcoal canister. When theengine is started, the vapours stored in thecanister are drawn into the induction systemthrough the purge control solenoid valve andare subsequently burned.The purge control solenoid valve is controlledby the ECU; when the engine coolant tempera-ture is low or the engine is idling, the purgecontrol valve is closed and fuel vapours remainstored in the canister. Under normal runningconditions when the engine is warm, the valveopens and the vapours are drawn into the inlettract and subsequently burned in the combus-tion chamber. SH020A1-E
Catalytic Convertor Operation Precautions; For a gasoline engine Hyundai Matrix models are fitted with catalytic convertors which require special operatingconsiderations. The catalytic convertor servesto oxidize certain noxious elements of theexhaust gases leaving the engine to reduce thelevel of pollutants emitted from the vehicle and,provided that care is exercised to prevent dam-age, the catalyst will operate efficiently for thelife of the vehicle.
7HFC5013
Catalytic Converter