Hyundai Santa Fe: Description and Operation - Exhaust Emission Control System - Emission Control SystemHyundai Santa Fe: Description and Operation


Exhaust emissions (CO, HC, NOx) are controlled by a combination of engine modifications and the addition of special control components.
Modifications to the combustion chamber, intake manifold, camshaft and ignition system form the basic control system.
These items have been integrated into a highly effective system which controls exhaust emissions while maintaining good drivability and fuel economy.
Air/Fuel Mixture Control System [Multiport Fuel Injection (MFI) System]
The MFI system uses signals from the heated oxygen sensor to activate and control the injector installed in the manifold for each cylinder, thus precisely regulating the air/fuel mixture ratio and reducing emissions.
This in turn allows the engine to produce exhaust gas of the proper composition to permit the use of a three way catalyst. The three way catalyst is designed to convert the three pollutants [hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx)] into harmless substances. There are two operating modes in the MFI system.
Open Loop air/fuel ratio is controlled by information programmed into the ECM.
Closed Loop air/fuel ratio is adjusted by the ECM based on information supplied by the oxygen sensor.

Catalytic Converter. Description and Operation
Description The catalytic converter of the gasoline engine is a three way catalyst. It oxidizes carbon monoxide and hydrocarbons (HC), and separates oxygen from the oxides of nitrogen (NOx). [WCC] [UCC] ...

See also:

Adjusting tire pressure
Tire pressure decreases over time, which is normal. The tire pressure must therefore be adjusted to maintain the recommended tire pressure. Use the recommended inflation pressure for cold tires to help ...

Specifications Item Specification Power source DC 14.4V (-) ground Frequency range / Channel space FM : 87.5 ~ 107.9 MHz / 200 KHz AM : 530 ~ 1710 KHz / 10 KHz Tuning type PLL SYNTHESIZED TUNING Impedance ...

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 passes through vent hoses ...