Multi-layer oil tube for coextrusion vehicle

A co-extrusion, automotive pipeline technology, applied in the direction of pipes, rigid pipes, layered products, etc., can solve problems such as decreased fuel leakage performance, unfavorable to reduce hydrocarbon emissions, etc.

Inactive Publication Date: 2008-01-23
CHERY AUTOMOBILE CO LTD
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Problems solved by technology

[0002] With the promotion and use of ethanol fuel in the country, the trial of methanol fuel and the advent of renewable fuels, compared with the use of standard fuel oil (fuel C), traditional single-layer polyamide 11 (or 12) or double-layer polyamide 11 (or 12) The fuel leakage performance of the pipeline is greatly reduced, which is not conducive to reducing hydrocarbon emissions (see Figure 2)

Method used

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  • Multi-layer oil tube for coextrusion vehicle

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Embodiment Construction

[0009] The application will be further described below in conjunction with the accompanying drawings.

[0010] Figure 1 shows a cross-sectional schematic diagram of an automobile pipeline made by co-extrusion, in which polyamide 612 is used for the outer layer, its long-term working temperature can reach 150 ° C, and the peak temperature can reach 180 ° C, which can be applied to the engine compartment and other high temperature environment areas. The use of polyvinylidene fluoride in the inner layer can effectively inhibit the leakage of hydrocarbons from the molecular gap and reduce the emission of hydrocarbons; compared with polyamide as the inner layer, it is not easy to use polyvinylidene fluoride in the inner layer Polar components (alcohols) react and are more suitable for alcohol-containing fuels. An intermediate layer of adhesive bonds the inner and outer layers together.

[0011] The total wall thickness of the automobile pipeline is 0.9-1.1mm, preferably 1.0mm. W...

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Abstract

A co-extruded multi-layer oil pipe for automobiles is provided, which comprises an outer layer (1) of Polyamide (PA) 612, an intermediate layer (2) of adhesive and an inner layer (3) of Polyvinylidene Fluoride (PVDF). The pipe is resistant to high temperature; the inner layer that is resistant to seepage of hydrocarbon is applicable for fuel oil with 15% below alcohol.

Description

technical field [0001] The invention relates to an automobile oil pipe, in particular to a multi-layer oil pipe for automobiles through co-extrusion. Background technique [0002] With the promotion and use of ethanol fuel in the country, the trial of methanol fuel and the advent of renewable fuels, compared with the use of standard fuel oil (fuel C), traditional single-layer polyamide 11 (or 12) or double-layer polyamide 11 (or 12) The fuel leakage performance of the pipeline is greatly reduced, which is not conducive to reducing hydrocarbon emissions (see Figure 2). At the same time, as the design of modern vehicles becomes more and more compact, the gaps between various parts are getting smaller and smaller, especially in the engine compartment, the heat radiation is getting bigger and bigger, and the requirements for the heat resistance of the fuel system are getting higher and higher. All these changes present new challenges to the materials and structures used in fuel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/12B32B1/08
Inventor 黄波张建波高必勇王三省
Owner CHERY AUTOMOBILE CO LTD
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