Absorber

Operating principle

Above the surface of fuel in the tank depending on the pressure and the ambient temperature are formed to a greater or lesser degree of fuel vapor.

System Activated charcoal filter prevents ingress data hydrocarbon vapors into the atmosphere.

Fuel vapor passes from the highest point in the tank through the relief valve in dependence from throttling in activated charcoal filter.

The activated carbon absorbs the gases such as sponge.

When driving and active lambda control (engine warm), engine control unit opens the solenoid valve 1 is activated charcoal canister (also regenerating valve) depending on the load and speed. Opening depends on the incoming signals.

During the cleaning process (regeneration of activated carbon) by vacuum in the intake manifold through the vent pipe absorber absorbed fresh air. Contained in the activated carbon at a particular time a pair of fuel and clean air are metered, and then burned in the engine.

Pressure relief valve prevents the suction of fuel vapors from the tank with the open solenoid valve activated charcoal canister and the intake manifold vacuum. Thus, it provides a pre-emptive evacuation absorber.

In the absence of power supply (eg. A break in the electrical circuit), the solenoid valve is closed. In this case, the absorber is not emptied.