Abstract: Novel configuration preventing collision of data transmissions on data transmission paths. Repeated transmission attempts after said collisions thus become unnecessary. Transmission capacity of the data network can be used optimally resulting in considerably faster control.

Abstract: In a safety device of a fuel system for an internal combustion engine including a fuel filter with a venting nozzle adapted to prevent the discharge of fuel through the venting nozzle of the fuel filter which is connected to a pump line, the safety device which is mounted on the vent nozzle of the fuel filter includes in its housing a semi-permeable foil which is gas permeable but not liquid permeable. The semi-permeable foil extends across the vent nozzle passage and a non-return valve is disposed in the vent nozzle passage for closing the vent nozzle passage if the semi-permeable foil ruptures.

Abstract: A fuel tank having a trapping device arranged in its filler pipe for trapping fuel vapors during refuelling which has an internal closure flap which not only closes off an end of the filler pipe but also closes off connection to an activated carbon filter. Insertion of a fuel nozzle opens the flap valve.

Abstract: A device for trapping fuel vapors during the refuelling of a fuel tank having a vapor control valve and which during refuelling, is moved into an open position provided outside the tank filler pipe safety valve which closes under the influence of gravity due to certain inclined positions of the fuel tank is connected upstream of the control valve, so that no fuel can escape through the vapor vent line in the case of a crash, even if the control valve no longer closes.