Kia Optima: 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 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. |
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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See also:
Removal
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Take care not to scratch
the center fascia panel and related parts.
•
Eject all the ...
Owner Maintenance Schedule
The owner or a qualified service technician should perform these vehicle inspections
at the indicated intervals to ensure safe and dependable operation.
Bring any problem to the attention of an aut ...
Removing the Spare Tire
Turn the tire hold-down wing bolt counterclockwise. Store the tire in the reverse
order of removal.
To prevent the jack, jack handle, and tool bag from “rattling” while the vehicle
is in motion ...