Fuel tank for a motor vehicle of thermoplastic material

Abstract

The invention relates to a thermoplastic fuel tank ( 1 ) for motor vehicles, with at least on stiffening element within the fuel tank ( 1 ), wherein the stiffening element extends between two opposite tank walls ( 4 ) in such a manner that it counteracts deformation caused by internal pressure of the fuel tank ( 1 ). According to the invention, two ends of the stiffening element arranged within the fuel tank ( 1 ) engage behind the tank wall ( 4 ) from the outside.

1 . Thermoplastic fuel tank for a motor vehicle, with at least one stiffening element within the fuel tank, wherein the stiffening element extends between two opposite tank walls in such a manner that it counteracts deformation caused by internal pressure of the fuel tank, characterized in that two ends of the stiffening element engage behind the tank wall from the outside. 
     
     
         2 . Fuel tank according to  claim 1 , characterized in that the stiffening element passes through two mutually aligned openings in regions of the tank wall lying opposite each other at a distance from each other. 
     
     
         3 . Fuel tank according to  claim 1 , characterized in that the connecting element is supported on both sides against the tank outer wall by a flange-like collar or fastening tongues. 
     
     
         4 . Fuel tank according to  claim 1 , characterized in that at least one end of the stiffening element is welded to the tank outer wall in a gastight and liquid tight manner. 
     
     
         5 . Fuel tank according to  claim 1 , characterized in that at least one end of the stiffening element is braced against the tank wall, with means for providing a seal preferably being arranged between the tank wall and the stiffening element in such a manner that the connection between the stiffening element and tank outer wall is gastight and liquid tight. 
     
     
         6 . Fuel tank according to  claim 1 , characterized in that at least one end of the stiffening element is connected to the tank outer wall by a rotary and latching connection, with the rotary and latching connection preferably comprising means for providing a seal such that the connection between the stiffening element and tank outer wall is gastight and liquid tight. 
     
     
         7 . Fuel tank according to  claim 1 , characterized in that the stiffening element is supported against the tank outer wall under prestress in such a manner that the prestress counteracts deformation of the fuel tank due to a rise in pressure within the fuel tank. 
     
     
         8 . Fuel tank according to  claim 1 , characterized in that the stiffening element comprises at least two parts. 
     
     
         9 . Fuel tank according to  claim 1 , characterized in that the parts of the stiffening element can be connected by means of a screw connection, bayonet connection, plug-in connection, snap-in connection or latching connection. 
     
     
         10 . Fuel tank according to  claim 1 , characterized in that the stiffening element is designed as a feed unit, with the feed unit being arranged between opposite aligned openings in the tank wall. 
     
     
         11 . Fuel tank according to  claim 1 , characterized in that the fuel tank is designed as an extrusion blow-molded tank.