Hyundai Santa Fe (TM): Exhaust Emission Control System
Description and operation
Description |
1. |
Open Loop air/fuel ratio is controlled by information pre-programmed
into the ECM.
|
2. |
Closed Loop air/fuel ratio is constantly adjusted by the ECM based on
information supplied by the oxygen sensor.
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Catalytic Converter. Description and operation
Description |
Catalytic Converter. Repair procedures
Removal |
1. |
Remove the exhaust manifold.
(Refer to Engine Mechanical System - "Exhaust Manifold")
|
1. |
Remove the Center Muffler.
(Refer to Engine Mechanical System - "Center Muffler")
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Installation |
1. |
Install in the reverse order of removal.
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CVVT (Continuously Variable Valve Timing) System. Description and operation
Description |
– |
the CVVT Oil Control Valve (OCV) which supplies the engine oil to the
cam phaser or runs out the engine oil from the cam phaser in accordance
with the ECM PWM (Pulse With Modulation) control signal,
|
– |
the CVVT Oil Temperature Sensor (OTS) which measures the engine oil
temperature,
|
– |
and the Cam Phaser which varies the cam phase by using the hydraulic
force of the engine oil.
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Operation Principle |
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[CVVT System Mode] |
(1) Low Speed / Low Load |
(2) Part Load |
|
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(3) Low Speed / High Load |
(4) High Speed / High Load |
|
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Driving Condition |
Exhaust Valve |
Intake Valve |
||
Valve Timing |
Effect |
Valve Timing |
Effect |
|
(1) Low Speed /Low Load |
Completely Advance |
* Valve Under-lap * Improvement of combustion stability |
Completely Retard |
* Valve Under-lap * Improvement of combustion stability |
(2) Part Load |
Retard |
* Increase of expansion work * Reduction of pumping loss * Reduction of HC |
Retard |
* Reduction of pumping loss |
(3) Low Speed /High Load |
Retard |
* Increase of expansion work |
Advance |
* Prevention of intake back flow (Improvement of volumetric efficiency) |
(4) High Speed /High Load |
Advance |
* Reduction of pumping loss |
Retard |
* Improvement of volumetric efficiency |
Evaporative Emission Control System
Description and operation Description Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor ...See also:
TPMS Receiver. Description and Operation
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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. This system supplies fresh filtered air to the crankcase through ...
Fuel Additives
HYUNDAI recommends that you use good quality gasolines treated with detergent additives such as TOP TIER Detergent Gasoline, which help prevent deposit formation in the engine. These gasolines will help ...