Kia Optima: Emission Control System / Exhaust Emission Control System
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 [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.
| 1. |
Open Loop air/fuel ratio is controlled by information programmed into the ECM. |
| 2. |
Closed Loop air/fuel ratio is adjusted by the ECM based on information supplied by the oxygen sensor. |
Purge Control Solenoid Valve (PCSV)
Specifications
Specification
Item
Specification
Coil Resistance (Ω)
22.0 - 26.0 [20°C (68°F)]
Schematic diagrams
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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 fr ...
Other information:
Kia Optima DL3 2019-2023 Owner's Manual: If the engine overheats
If your temperature gauge indicates overheating, you experience a loss of power, or hear loud pinging or knocking, the engine will probably be too hot. If this happens, you should: 1.Pull off the road and stop as soon as it is safe to do so. 2.Place the shift lever in P (for Automatic transmis ...
Kia Optima DL3 2019-2023 Owner's Manual: Warning message and warning light
When the sensor is blocked with dirt, snow, or debris, the FCA system operation may stop temporarily. If this occurs, a warning message will appear on the LCD display. The system will operate normally when such dirt, snow or debris is removed. However, the FCA system may not properly operate ...
