The system uses a method of vapor absorption by a carbon adsorber. It is installed on the fuel tank and connected by steam pipes to the fuel tank and the inlet pipe.
On the bracket installed on the intake pipe there is an electromagnetic valve for purging the adsorber, which switches the operating modes of the system according to signals from the engine control unit.
Fuel vapors from the fuel tank are constantly removed through the vapor line and accumulate in an adsorber filled with activated carbon (adsorbent). Regeneration occurs when the engine is running (recovery) adsorbent by purging the adsorber with fresh air entering the system under the action of the vacuum transmitted through the steam line from the inlet pipe to the cavity of the adsorber when the valve opens. The magnitude of the valve opening, and therefore the intensity of the adsorber purge, depend on the angle of rotation of the throttle valve and are determined by the vacuum that occurs in the cavity of the inlet pipe of the running engine.
Fuel vapors from the adsorber enter the engine intake pipe through the vapor line and burn in the cylinders.
Malfunctions of the fuel vapor recovery system lead to unstable idle speed, engine stalling, increased toxicity of exhaust gases and deterioration of the vehicle's driving performance.