Kia Rio: 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 is a system which uses the 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 gases of the proper composition to permit the use of a three way catalyst. The three way catalyst is designed to convert the three pollutants (1) hydrocarbons (HC), (2) carbon monoxide (CO), and (3) 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. |
Fuel Filler Cap
Description and operation
Description
A ratchet tightening device on the threaded fuel filler cap reduces the chances
of incorrect installation, which would seal the fuel filler. After ...
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 Rio 2017-2020 YB Service Manual: Shift Lever
Components and components location Components 1. Shift lever knob & boots 2. Shift lever assembly 3. Shift cable assembly Repair procedures Removal 1. Shift the gear to "N". 2. ...
Kia Rio 2017-2020 YB Service Manual: Engine And Transaxle Assembly
Repair procedures Removal • Use fender covers to avoid damaging painted surfaces. • To avoid damage, unplug the wiring connectors carefully while ...