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Hyundai Tucson: Exhaust Emission Control System - Description

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Emission Control Syste / Exhaust Emission Control System / Exhaust Emission Control System - 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 consist 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.

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).

WCC

Removal and

Removal and Installation

Catalytic Converter (WCC)

Remove the exhaust manifold.

(Refer to Engine Mechanical System - "Exhaust Manifold")

Installation

Install in the reverse order of removal.

Description

The Gasoline Particulate Filter (GPF) system prevents Particulate Matter (PM) from being discharged to the atmosphere and consists of a filter assembly, two Exhaust Gas Temperature Sensors (EGTS).

The filter is integrated in the catalytic converter assembly and has honeycomb cell structure which can filter the PM in the exhaust gas. While the exhaust gas passes the GPF, This gathered PM in GPF is called "soot".

GPF Regeneration

This procedures is to forcibly regenerate the GPF with scan tool when the GPF doesn't have been regenerated during driving. For example, if the vehicle has repeated "Low speed driving" or "Short distance driving", the GPF

GPF Regeneration - Removal

Removal Turn the ignition switch OFF and disconnect the battery negative (-) cable. Lift up the vehicle. Remove the floor under cover front RH. Disconnect the Exhaust Gas Temperature Sensor (EGTS) Front (A) and Rear (B). Rem

GPF Regeneration- Description

Description Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine speed and load. By controlling CVVT, th

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Inhibitor switch/ Manual control lever- Removal

Turn ignition switch OFF and disconnect the batteiy negative (-) terminal. Make sure vehicle does not roll before setting shift lever to "N" position. Remove the air cleaner assembly and air duct. (Refer to Engine Mechanical

Monitor cover

Remove the front monitor lower cover after disconnecting the mood lamp connector Remove front monitor side cover (A) and (B). Remove the front monitor assembly (A). Remove the front monitor assembly (A) aft