Action principle

Over a fuel surface in a tank depending on pressure and surrounding temperature pairs of fuel are formed to a greater or lesser extent.

The absorber system with absorbent carbon does not allow hit of these hydrocarbonic evaporations in the atmosphere.

Pairs of fuel get from the highest point of a fuel tank (at a jellied mouth) through a broad tank to an absorber with absorbent carbon.

Absorbent carbon absorbs these gases like a sponge.

During movement at active a lambda regulation (the heated-up engine) the electromagnetic valve of 1 absorber and the electromagnetic valve 2 absorbers with N115 absorbent carbon cope with N80 absorbent carbon depending on loading and number of turns the engine control unit. Time of opening depends on arriving signals.

During cleaning process (absorbent carbon regeneration) at the expense of a razryazheniye in an inlet collector through a ventilating branch pipe of an absorber clean air is soaked up. Containing in absorbent carbon for a certain moment of time of pair of fuel and clean air are dosed out and then burn down in the engine.

In the absence of power supply (e.g. a gap in an electrochain) electromagnetic valves of system of an absorber are closed. In that case the absorber is not emptied.

Descriptions of a principle of action of system of diagnostics of tightness

The absorber system (including a fuel tank) is equipped with system of diagnostics of tightness which distinguishes leaks in system.

Diagnostics is based on a principle of superfluous pressure and should specify not tight places, which diameter more than 1 mm.

During diagnostics via the diagnostic pump of fuel system V144 in system of an absorber superfluous pressure about 30 Mbar is created. When the set pressure is reached, the pump is disconnected. If pressure falls below a certain value, the pump turns on again. The system of self-diagnostics supervises periodicity of turning on of the pump and at too short intervals keeps in memory of malfunctions a mistake.