Hyundai Accent Manuals

Hyundai Accent: Description and Operation - Exhaust Emission Control System - Emission Control System - Hyundai Accent 2010-2019 Service ManualHyundai Accent: Description and Operation

Description

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 [Gasoline Direct Injection (GDI) System]
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.
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.

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). ...

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Battery replacement
The transmitter uses a 3 volt lithium battery which will normally last for several years. When replacement is necessary, use the following procedure. 1. Insert a slim tool into the slot and gentl ...

Front Impact Sensor (FIS). Description and Operation
Description The front impact sensor (FIS) is installed in the front side member. They are remote sensors that detect acceleration due to a collision at its mounting location. The primary pur ...

Distributing the sealant
11. Immediately drive approximately 4~6miles (7~10km or, about 10min) to evenly distribute the sealant in the tire. Do not exceed a speed of 50 mph (80 km/h). If possible, do not fall below a speed ...

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