Sandwich type motor vehicle oil tank with barrier film and injected tank inner wall and tank outer wall

Abstract

The invention relates to a fuel tank for a motor vehicle, comprising a first and a second tank shell, between which at least one section of a tank volume of the fuel tank is defined and which has an edge region with a joining flange, the first and the second tank shell being joined to each other via a common joining surface in a cohesive manner at the joining flange thereof, the first and second tank shells are multi-component tank shells and have a barrier film and, at least in the edge regions thereof, inner wall sections / outer wall sections which are injected onto the inner side / outer side of the barrier film facing / facing away from the tank volume by means of an injection molding technique, the barrier film of each tank shell is shaped such that it extends away from the tank volume and towards the outside of the tank in the region of the joining flange when approaching the common joining surface, such that a cohesive joining connection of the tank shells is formed by a first joining region near the tank volume and a second joining region away from the tank volume, the injected tank inner wall sections of the two tank shells are joined to each other in a first joining region, and the barrier films of the two tank shells are joined to each other in a second joining region.

Description

technical field [0001] The invention relates to a motor vehicle fuel tank comprising a first tank shell and a second tank shell, wherein the first tank shell and the second tank shell define between them at least a section of the tank volume of the motor vehicle fuel tank, wherein the first A housing shell and a second housing shell each have an edge region with a joint flange, wherein the first housing shell and the second housing shell are bonded to one another at their joint flanges via a common joint surface in a material-fit manner , wherein the first tank shell and the second tank shell are respectively multi-component tank shells having a barrier film and at least in their edge regions an inner side facing the tank volume injected onto the barrier film with injection molding technology The inner wall section on the top and the outer wall section are injection-molded onto the outer side of the barrier membrane facing away from the tank volume. Background technique [...

AI Technical Summary

Problems solved by technology

[0005] The multi-component injection molding method for forming the barrier layer between the injection-molded inner and outer layers is difficult to implement with regard to the layer thicknesses to be followed and the distribution of the layer thicknesses along the surface of the tank shell

[0006] Enclosures with fully exposed barrier membranes increase the risk of barrier membrane damage

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