Emission Control System - Hyundai Matrix 2003 Owner's Manual

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 system
will comprise one or more of the following
emission 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 is
recommended that the vehicle is inspected and
maintained by an authorized Hyundai dealer in
accordance 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 gases being emitted from the crank-
case by introducing fresh air to the crankcase

EMISSION CONTROL SYSTEM

through the air cleaner where this mixes with
blow-by gases and then passes through the
PCV valve into the intake manifold from where
it subsequently enters the combustion cham-
ber and is burned.
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 tank
ventilation system.
Whilst the engine is not running, fuel vapours
generated inside the fuel tank are absorbed
and stored in a charcoal canister. When the
engine is started, the vapours stored in the
canister are drawn into the induction system
through the purge control solenoid valve and
are subsequently burned.
The purge control solenoid valve is controlled
by the ECU; when the engine coolant tempera-
ture is low or the engine is idling, the purge
control valve is closed and fuel vapours remain
stored in the canister. Under normal running
conditions when the engine is warm, the valve
opens and the vapours are drawn into the inlet
tract and subsequently burned in the combus-
tion chamber.
SH010D1-E
3. EXHAUST EMISSION CONTROL
SYSTEM
The exhaust emission control system is a highly
effective system which controls exhaust emis-
sion while maintaining good vehicle perfor-
mance.
SH020A1-E
Catalytic Convertor Operation
Precautions
; For a gasoline engine
Catalytic Converter
HFC5013
Hyundai Matrix models are fitted with catalytic
convertors which require special operating
considerations. The catalytic convertor serves
to oxidize certain noxious elements of the
exhaust gases leaving the engine to reduce the
level of pollutants emitted from the vehicle and,
provided that care is exercised to prevent dam-
age, the catalyst will operate efficiently for the
life of the vehicle.
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