Volkswagen Ag

Volkswage Ag

Burkhard Kraft

Rolf Reinke

Liane Ludwig

A shut-off valve for a tank, including a filling tube with a filling-side valve seat and a tank-side valve seat. The seats being spaced apart from one another in a throughflow direction of the filling tube. A valve body with a sealing element is movable between the valve seats so as to butt against one of the valve seats depending on position of the valve body in the tube. A component is provided for prestressing the valve body toward the filling-side valve seat so as to seal the filling tube in relation to the filling-side valve seat in a rest position of the valve body, the prestressing component being configured so that the prestressing of the valve body can be overcome by flow pressure of a medium which is to be introduced toward the tank-side valve seat. A filling-level-controlled stop device is operatively arranged for stopping movement of the valve body in the direction of the tank-side valve seat in a position in which the sealing element is kept at a distance from the valve seats so that the medium which is to be introduced can flow around the valve body. The stop action of the stop device is eliminated when a predetermined filling level in the tank is reached.

Shut-off valve for a tank

To diminish the escape of fuel vapors from a fuel tank filling tube during filling of the tank, a valve is provided that is switched by insertion of a fuel pump nozzle into the filling pipe so that fuel vapors escaping upon filling of the fuel tank are transmitted with comparatively low flow resistance to an active carbon receptacle. When the fuel pump nozzle is removed from the filling tube, the valve is returned to its normal operating position in which venting of the tank takes place through an upper portion of the tank filling tube and through a gravity valve and a pressure holding valve.

Motor vehicle tank

In the particular embodiments described in the specification, a motor vehicle tank has a filling tube with a vent orifice connected to a device for adsorbing fuel vapors and a sealing arrangement including two annular lips spaced on opposite sides of the vent orifice and arranged to sealingly engage a filling pump nozzle to seal off the orifice from the fuel tank and from the atmosphere during filling of the tank.

Growing community of inventors

Isenbuttel, Germany

Burkhard Kraft