Kia Optima: Emission Control System / Exhaust Emission Control System

Kia Optima DL3 2019-2022 Service and Repair Manual / 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 ...

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 2019-2022 Service and Repair Manual: Battery


Repair procedures Inspection [NU 2.0 MPI] Battery Voltage and Status Check the battery voltage and status by using a battery tester. Battery Terminal 1. Move back and forth to check if the battery terminals (A) are loose or corroded. Clean any cor ...

Kia Optima DL3 2019-2022 Service and Repair Manual: Wireless Charging Indicator


Schematic diagrams Connector and Terminal function Pin Function 1 Ground 2 LED charging lamp (Green) 3 LED charging lamp (Amber) 4 - ...

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