TANK VENTILATION DEVICE FOR A MOTOR VEHICLE

摘要

The invention relates to a tank ventilation device (10) for a motor vehicle. A fuel tank (12) can be filled with fuel via a filler pipe (14). A ventilation line (20) is connected at one side to the filler pipe (14) and at the other side to an activated carbon filter (26). To carry out a leak test of the tank ventilation device (10), the ventilation line (20) can be pressurized by means of a device (36) when the filler pipe (14) is closed by means of a tank cover. In the region of a connection (18) of the ventilation line (20) to the filler pipe (14) there is provided a float body by means of which an ingress of liquid fuel into the ventilation line (20) can be prevented. In this way, a hydraulic closure of the ventilation line (20) can be prevented if said ventilation line has a siphon (22).