Hyundai Accent: 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.

The GDI 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 GDI system.

Exhaust Emission Control System

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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). ...

See also:

In case of an emergency while driving
If the engine stalls at a crossroad or crossing If the engine stalls at a crossroad or crossing, set the shift lever in the N (Neutral) position and then push the vehicle to a safe place. If you h ...

Adjustment
Operate the horn, and adjust the tone to a suitable level by turning the adjusting screw. After adjustment, apply a small amo ...

Cleaning
1. Make sure the ignition switch and all accessories are in the OFF position. 2. Disconnect the battery cables (negative first). ...