EMISSION CONTROL SYSTEMS
7-1
7. EMISSION
CONTROL
SYSTEMS
H010A01A-GAT
EMISSION CONTROL SYSTEMS
(If installed)
Your Hyundai is equipped with an emission
control system to meet all requirements of the
Emission prohibition rules of your province.
There are three emission control systems which
are as follows.
(1) Crankcase emission control system
(For a Gasoline Engine)
(2) Evaporative emission control system
(For a Gasoline Engine)
(3) Exhaust emission control system
In order to assure the proper function of the
emission control systems, it is recommended
that you have your car inspected and main-
tained by an authorized Hyundai dealer in ac-
cordance with the maintenance schedule in this
manual.
H010C02Y-GAT
2. Evaporative Emission Control
System; For a Gasoline Engine
The Evaporative Emission Control System is
designed to prevent fuel vapors from escaping
into the atmosphere.
Canister
While the engine is inoperative, fuel vapors
generated inside the fuel tank are absorbed and
stored in the canister. When the engine is
running, the fuel vapors absorbed in the canis-
ter 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 ECM; when the engine coolant tempera-
ture is low, and during idling, it closes, so that
evaporated fuel is not taken into the surge tank.
After engine warm-up, during ordinary driving, it
opens so as to introduce evaporated fuel to the
surge tank.
H020A01A-AAT
CATALYTIC CONVERTER
; For a Gasoline Engine
H020A01HP
Catalytic Converter
All Hyundai vehicles are equipped with a mono-
lith type three-way catalytic converter to re-
duce the carbon monoxide, hydrocarbons and
nitrogen oxides contained in the exhaust gas.
Exhaust gases passing through the catalytic
converter may cause it to operate at a very high
temperature. The introduction of large amounts
of unburned gasoline into the exhaust may
cause the catalytic converter to overheat and
create a fire hazard. This risk may be reduced
by observing the following:
H010B01A-AAT
1. Crankcase Emission Control System
; For a Gasoline Engine
The Positive Crankcase Ventilation System is
employed to prevent air pollution caused by
blow-by gases being emitted from the crank-
case. This system supplies fresh filtered air to
the crankcase through the air intake hose.
Inside the crankcase, which the fresh air mixes
with blow-by gases, which then pass through
the PCV valve into the induction system.
7
H010D01A-AAT
3. Exhaust Emission Control System
The Exhaust Emission Control System is a
highly effective system which controls exhaust
emissions while maintaining good vehicle
performace.
