Hyundai Ioniq: Exhaust Emission Control System / Description and operation

Hyundai Ioniq (AE) 2017-2025 Service Manual / Engine Electrical 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 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.

Exhaust Emission Control System

Catalytic Converter. Description and operation

DescriptionThe 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:

Hyundai Ioniq (AE) 2017-2025 Service Manual: Electric Parking Brake (EPB). Description and operation

DescriptionThe EPB is an electronic parking brake. The EPB is different from existing parking systems which operated with the brake pedal or the lever type. The EPB system sends the signal to the ECU when a driver operates the EPB switch. The ECU operates the EPB actuator composed with motor gears...

Hyundai Ioniq (AE) 2017-2025 Service Manual: Blower Unit. Components and components location

Component Location1. Blower unit assembly Components1. Duct Seal2. Intake duct case3. Air intake door assembly4. Intake door5. Seal6. Intake duct case (A)7. Air filter cover (A)8. Intake actuator9. Air filter cover10. Air filter 11. Blower unit pad12...