Hyundai Tucson: Crankcase Emission Control System
Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Emission Control Syste / Crankcase Emission Control System
Description
- Crankcase pressure regulating valve (PRV)
- Breather hose
- Air flow
- Intake manifold
- Cylinder block
- Blow-by gas flow
- Blow-by gas inflow to the cylinder head cover throungh the cylinder block & head & chain cover
- -1 In the partial load area, blow-by gas inflow to the intake manifold through the PRV valve which in the head cover.
- -2 In the full load area, blow-by gas inflow to the intake hose through the PRV valve which in the head cover.
- Mix of intake hose and blow-by gas. Blow-by gas is circulated by the (3)-1, (3)-2 procedure.
- 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
- Remove the cylinder head cover.
(Refer to Engine Mechanical System - "Cylinder Head Cover")
Installation
- 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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Evaporative Emission Control System - Description
Description
The 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 a canister filled with
Evaporative Emission Control System - Removal
Removal
WARNING
Be careful not to damage the parts located under the vehicle (floor
under cover, canister, fuel tank)
when raising the vehicle using the lift.
(Refer to General Information - "Lift and Support Points")
Turn
SEE MORE:
Instrument cluster control
4.2-inch
10.25-inch
The actual cluster in the vehicle may differ from the illustration.
For more information, refer to "Gauges and meters" section in this chapter.
Tachometer
Speedometer
Engine coolant temperature gauge
Fuel
If you have a flat tire (equipped with spare tire)
WARNING
Changing a tire can be dangerous.
Follow the instructions in this section
when changing a tire to reduce the risk
of serious injury or death.
CAUTION
Be careful as you use the jack handle to
stay clear of the flat end. The flat end
Information
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- Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual
