Fuel tank with vapor trap connection to filler pipe

Claim 1

A fuel tank having a trapping device arranged in its filler pipe for trapping fuel vapors during refuelling, comprising: a fuel tank having a filter pipe and defining a space located above a maximum fuel filling level of the fuel tank and communicates with an activated carbon filter which is directly connected to an engine fuel filter intake pipe; a self-closing control valve normally closing off the communication between the fuel tank space and the activated carbon filter and operable to allow the communication therebetween; a closure flap located proximate in a guide channel to control the control valve into its open position, which guide channel is configured to seal the inside of the fuel filler intake pipe when a fuel dispenser filler nozzle is inserted into the guide channel; the closure flap working against a closing force; wherein the closure flap also forms a valve element of the control valve; the closure flap and the guide channel comprise a housing insertably arranged in a sealed fashion in a closable endpiece of the filler pipe; the housing further includes a shell opening arranged between the closure flap and the direct connection between the filler pipe and the activated carbon filter; the guide channel contains a seal for sealingly enclosing an inserted fuel dispsenser filler nozzle; an end wall of the housing is located at a distance from the seal and has an end wall circular opening aligned with the guide channel and closed by the closure flap; the diameter of the end wall circular opening is larger than an outside diameter of a fuel dispenser filler nozzle; a space between the seal and the end wall circular opening communicates with the shell opening of the housing; an additional end wall opening communicates with the space existing between the seal and the end wall circular opening, defining a valve seat, a safety valve in the housing adjacent the shell opening biased against said value seat; and the additional end wall opening is connected with the shell opening of the housing during an opened condition of the safety valve.