Kia Rio: Emission Control System / Exhaust Emission Control System

Kia Rio 2017-2022 YB Service 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 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 2017-2022 YB Service Manual: Floor Carpet


Repair procedures Replacement    Put on gloves to protect your hands.    • Use a plastic panel removal tool to remov ...

Kia Rio 2017-2022 YB Service Manual: Evaporative Emission Control System


Description and operation Description Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor passes through vent hoses or tubes to the canister filled with charcoal and th ...

Copyright © www.krioyb.com 2017-2022