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Motor vehicle fuel tank

A technology for fuel tanks and automobiles, applied in the field of injection pipes, can solve the problem of no longer being able to ensure the sealing of connection points, and achieve the effect of lasting sealing and ensuring sealing

Inactive Publication Date: 2014-04-02
KAUTEX TEXTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this point it is no longer possible to ensure a complete seal of the connection point due to the high vapor pressure of ethanol-containing fuels

Method used

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  • Motor vehicle fuel tank
  • Motor vehicle fuel tank
  • Motor vehicle fuel tank

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] The fuel tank 1 according to the invention is blow-molded from thermoplastics in a known manner as a six-layer or seven-layer coextrusion. Fuel tank 1 is not fully shown for simplicity. Only the tank wall 2 is shown in the figures. The exact layer structure of the extrusion-blow-molded fuel tank 1 is also not shown, only a barrier layer 3 against liquid and / or gaseous hydrocarbons is shown in the figures.

[0022] The fuel tank can, for example, be extrusion blowmolded from a hose-shaped extrudate. Optionally, it is possible to form the fuel tank from the strip-shaped or sheet-shaped extrudate at a first high temperature. Finally, according to the invention, the fuel tank can also be obtained by thermoforming a plate-shaped semi-finished product.

[0023] To accommodate the filling tube 4 , which is also made of thermoplastic, the tank wall 2 is provided with a hole 5 , which is obtained, for example, by cutting out a circular hole.

[0024] The filler pipe 4 is sho...

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PUM

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Abstract

The invention relates to a motor vehicle fuel tank (1) of thermoplastics having at least one filler neck (4) not moulded on in one piece, the latter being connected in a fluid-tight manner to the fuel tank (4), wherein the filler neck (5) is inserted into an opening (5) in the fuel tank (1) and is sealed by sealing means (11) at its outer circumference relative to the fuel tank (1) in the opening (5). The filler neck (4) is clamped axially against the tank wall (2), with the seal acting radially.

Description

technical field [0001] The present invention relates to an automotive fuel tank made of thermoplastic comprising at least one non-integrally molded filler tube. Background technique [0002] A motor vehicle fuel tank made of thermoplastic has the advantage over comparable metal tanks that it can be produced in almost any desired configuration with relatively complex shapes. Such tanks are relatively durable, since mechanical actions from the outside (for example in the event of a crash) generally do not lead to permanent deformation of the plastic tank. Furthermore, such a vehicle fuel tank can be adapted to almost any arbitrary installation situation in a vehicle. In the known one-piece or one-piece fuel tanks made of plastic, the filler pipe and the filling and venting lines are at least partially integrally molded together. When producing such a tank by extrusion blow molding, one or more parallel pipes can be easily molded onto the tank in a relatively simple manner. ...

Claims

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Application Information

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IPC IPC(8): B60K15/03
CPCB60K15/04B60K15/03177B60K15/035B60K2015/03557B60K15/01B60K2015/03528Y10T137/86372B60K15/03
Inventor K·格贝特A·瓦格纳
Owner KAUTEX TEXTRON
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