Kia Optima Hybrid: Exhaust Emission Control System / 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.
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. |
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). ...
Other information:
Description The STPS operates via a non-contacting magnetic proximity sensing device combined with a simple electronic circuit resulting in the ability of producing two separate and distinct logic level signals. The STPS output signal is altered by the proximity of a separate ferro-magnetic shunt, which ...
Replacement Seat Assembly Replacement 1. Remove the rear seat cushion (A). 2. Disconnect the rear seat heater connectors (A). 3. After loosening the mounting bolts, then remove the rear seat back (A). Tightening torque : 16.7 ~ 25.5N.m (1.7 ~ 2.6kgf.m, 12.3~18.8lb-ft) 4. Installation is the reverse of ...
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