Tank purge is regulated by the engine control unit (ECM) when the engine is running for a certain period of time. Air is introduced into the tank and mixed with vapors. After that, the air-fuel mixture enters the intake manifold.
The ECM closes the power circuit to the EVAP exhaust purge solenoid valve. This valve has pulse width modulation (PWM), i.e. turns on and off several times a second. The EVAP canister purge PWM sleep mode varies depending on operating conditions determined by airflow mass, fuel trim, and intake air temperature.
Unsatisfactory idling, jamming and poor handling may occur under the following conditions:
- EVAP reservoir purge solenoid valve inoperable;
- tank damage;
- rupture, cracks in hoses, incorrect connection of tubes.
Evaporative Emission System Capacity
Exhaust Evaporation Tank (EVAP) is an exhaust control device, with the inclusion of charcoal pellets. The EVAP exhaust evaporator tank is used to store fuel vapor from the fuel tank. Upon receiving the necessary conditions, the engine control unit activates the EVAP reservoir purge solenoid, which allows fuel vapor to be directed into the engine cylinders and burned.
Removal of elements of system of catching of steams of fuel
Attention: the elements of the system may contain hot vapours. Avoid open flames and do not smoke nearby.
1. Remove the evaporator hoses from the exhaust evaporator.
2. Remove the bolt securing the EVAP reservoir flange to the vehicle.
3. Remove the EVAP evaporator.
Installation of elements of the fuel vapor recovery system
1. Place the can of the evaporative emission system in the slide, install it in place and tighten the flange mounting bolt to 20 Nm.
2. Connect the hoses.