Emission Control System - Hyundai H-1 2003 Owner's Manual

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7. 7. 7. 7. 7. EMISSION CON- EMISSION CON- EMISSION CON- EMISSION CON- EMISSION CON-
TROL TROL SYSTEM SYSTEM
TROL TROL TROL SYSTEM SYSTEM SYSTEM
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EMISSION EMISSION EMISSION EMISSION EMISSION CONTROL CONTROL CONTROL CONTROL CONTROL SYSTEM SYSTEM SYSTEM SYSTEM SYSTEM
(Gasoline) (Gasoline) (Gasoline) (Gasoline) (Gasoline)
Your Hyundai is equipped with an emission
control system.
There are three emission control systems which
are as follows.
(1) Crankcase emission control system
(2) Evaporative emission control system
(3) Exhaust emission control system
In order to assure the proper function of the
emission control systems, it is recommended
that you have your vehicle inspected and main-
tained by an authorized Hyundai dealer in ac-
cordance with the maintenance schedule in
this manual.
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1. 1. 1. 1. 1. CRANKCASE CRANKCASE CRANKCASE CRANKCASE EMISSION EMISSION EMISSION
CRANKCASE EMISSION EMISSION
SYSTEM SYSTEM SYSTEM
SYSTEM SYSTEM
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 air to the
crankcase through the air cleaner. Inside the
crankcase, the fresh air mixes with blow-by
gases, then passes through the PCV valve into
the induction system.
EMISSION EMISSION EMISSION
EMISSION EMISSION
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PCV Valve PCV Valve PCV Valve
PCV Valve PCV Valve
The crankcase ventilation system must be kept
clean to maintain good engine performance.
Periodic servicing is required to remove com-
bustion products from the PCV valve.
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2. 2. 2. 2. 2. E E E E E VAPORATIVE VAPORATIVE VAPORATIVE VAPORATIVE
VAPORATIVE
TROL TROL TROL TROL TROL S S S S S YSTEM YSTEM ( ( ( ( ( E E E E E xcept canister) YSTEM YSTEM YSTEM
The Evaporative Emission Control System is
designed to prevent fuel vapors from escaping
into the atmosphere.
If the fuel-vapor vent line is clogged or dam-
aged, the fuel-vapor mixture will escape into
the atmosphere and cause insufficient emis-
sion control.
Disconnect the line at both ends, and blow it
clean with compressed air.
Remove the filler cap from the filler pipe, and
check to see if there is evidence that the
packing contact to the filler pipe is faulty. The
overfill limiter (2-way valve) installed on the
vapor line between the canister inlet and fuel
tank outlet must be checked for correct opera-
CONTROL CONTROL CONTROL
CONTROL CONTROL
tion.
CONTROL CONTROL CONTROL SYSTEM SYSTEM SYSTEM
CONTROL CONTROL SYSTEM SYSTEM
E E E E E MISSION MISSION MISSION MISSION CON- CON- CON-
MISSION CON- CON-
xcept canister) xcept canister) xcept canister) xcept canister)
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Canister Canister Canister Canister 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.
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Purge Control Solenoid Valve Purge Control Solenoid Valve Purge Control Solenoid Valve Purge Control Solenoid Valve Purge Control Solenoid Valve
The purge control solenoid valve is controlled
by the ECU; 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.
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3. 3. 3. 3. 3. EXHAUST EXHAUST EXHAUST EXHAUST EXHAUST EMISSION EMISSION EMISSION EMISSION EMISSION
SYSTEM SYSTEM SYSTEM SYSTEM SYSTEM
The Exhaust Emission Control System is a
highly effective system which controls exhaust
emission while maintaining good vehicle per-
formance.
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C C C C C atalytic Converter atalytic Converter atalytic Converter atalytic Converter atalytic 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.
CONTROL CONTROL CONTROL CONTROL CONTROL
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