| abstract |
A fuel tank system for motor vehicles comprises a fuel tank (1) having a filler pipe (20), a ventilation line (3) connected to an activated carbon filter (2) and a valve arrangement that connects the ventilation line (3) to the activated carbon filter in a first switching position (I) (2) blocked off and released in a second switching position (II). In order to prevent pressure build-up in the tank, for example in the case of a nozzle that does not switch off, the valve arrangement is designed such that, in the first switching position (I), it sub-section (3a) of the ventilation line (3) arranged between it and the tank (1) Atmosphere connects. |