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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)

  1. Remove the exhaust manifold.

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

Installation

  1. 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

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    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

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    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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    Remove the cylinder head. (Refer to Cylinder Head Assembly - "Cylinder Head") Remove the RH water jacket insert and LH water jacket insert (A). WARNING When removing the water jacket insert, Be careful not to damage the

     Outside rear view mirror

    Component Location Outside rear view mirror Replacement WARNING When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components. Put on gloves to prevent hand injuries

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