- (1) Crankcase ventilation system
- (2) Evaporative Emission System
- (3) Engine exhaust aftertreatment system
To ensure the normal operation of the toxicity reduction systems, it is recommended that your vehicle be checked and maintained by an authorized Hyundai dealer within the time and scope specified in this Manual.
1. Crankcase ventilation system
The forced crankcase ventilation system serves to prevent air pollution by gases escaping from the cylinders into the crankcase. The system supplies fresh air to the crankcase through the air filter. In the crankcase, air is mixed with breakthrough gases, then this mixture is fed through the forced crankcase ventilation valve into the engine intake tract.
2. Evaporative Emission System
The fuel vapor recovery system is used to prevent fuel vapors from escaping into the atmosphere.
Adsorber
When the engine is not running, the fuel vapors formed in the tank are fed into the adsorber, which absorbs and retains them. After starting the engine, fuel vapors from the canister are fed into the engine intake tract through the canister purge solenoid valve.
Canister purge solenoid valve
The adsorber purge solenoid valve is controlled by commands from the engine control unit. When the coolant temperature is low when the engine is idling, the valve is closed and fuel vapors are not supplied to the engine. After the engine warms up while the car is moving, it opens and fuel vapors enter the engine intake tract receiver.
3. System of neutralization of the fulfilled gases
The exhaust gas aftertreatment system provides a highly effective reduction of exhaust gas toxicity while maintaining high driving performance of the car.