Ventilation unit for vehicle fuel tank; has directional control valve between ventilation line, operation ventilation unit and refuelling limiting valve and adsorption filter in ventilation line

摘要

The unit has a ventilation line (8) with an adsorption filter (9). An operation ventilation unit (5) and a refuelling limiting valve are (4) arranged in the fuel container (1). A 3/2 directional control valve (3) in the fuel tank can be connected on one side to the ventilation line and on the other side to either the operation ventilation unit or the refuelling limiting valve.