Hyundai Tucson: Crankcase Emission Control System

Description

1. Crankcase pressure regulating valve (PRV)
2. Breather hose
3. Air flow
4. Intake manifold
5. Cylinder block

1. Blow-by gas flow
2. Blow-by gas inflow to the cylinder head cover throungh the cylinder block & head & chain cover
3. -1 In the partial load area, blow-by gas inflow to the intake manifold through the PRV valve which in the head cover.

3. -2 In the full load area, blow-by gas inflow to the intake hose through the PRV valve which in the head cover.
4. Mix of intake hose and blow-by gas. Blow-by gas is circulated by the (3)-1, (3)-2 procedure.
5. Combustion the air-flow mixture.

Description

Pressure Regulating Valve (PRV) is installed to prevent the over pressure of combustion gas through the piston ring and onto the crankcase.

Operation Principle

Diaphragm component part

Removal

1. Remove the cylinder head cover.

(Refer to Engine Mechanical System - "Cylinder Head Cover")

Installation

1. Install in the reverse order of removal.

Description and Operation

Description

Emissions Control System consists of three major systems.

• Crankcase Emission Control System prevents blow-by gas from releasing into the atmosphere. This system recycles gas back into the intake manifold (Closed Crankcase Ventilation Type).
• Evaporative Emission Control System prevents evaporative gas from releasing into the atmosphere.

  This system burns gas at appropriate engine operating condition after gathering it in the canister.

• Exhaust Emission Control System converts the three pollutants hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx) into harmless substances by using the 3-way catalytic converter.

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