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Automobile engine compartment internal fuel pump cover and manufacturing method thereof

An engine compartment, internal fuel pump technology, applied to engine components, machines/engines, liquid fuel engines, etc., to achieve the effect of simple assembly

Inactive Publication Date: 2019-05-31
SHANGHAI XINAN CAR DEADENING FELT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN102529839A discloses a multi-layer sound-insulating and heat-insulating mat for an automobile engine compartment and a manufacturing method thereof. The sound-insulating and heat-insulating mat has a three-layer structure, and the upper surface layer and the lower surface layer have a density of 100 g / cm 2 non-woven fabric, the middle layer is a density of 13 ~ 18kg / m 3 The flame retardant polyurethane layer is obtained by mixing graphite powder, polyether and isocyanate into pieces to obtain a flame retardant polyurethane foam layer, and then the polyurethane foam layer and non-woven fabric are arranged in a molding mold, and the multilayer structure of the automobile engine is obtained by pressing. Cabin sound insulation pads, but this product is used for cabin cover sound insulation pads and front wall outer firewalls, molded parts, which are completely different from the composite foam parts of this application, and cannot solve the problem of high-pressure oil pumps and oil rails in this application. Design and development of noise source components, and the technical issues of wrapping the noise source

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A fuel pump cover in the engine compartment of an automobile, which matches the shape of the fuel pump in the engine compartment. The cover directly wraps engine components, especially engine components such as high-pressure fuel pumps and high-pressure fuel rails, without the need for a separate cover cover. The fuel pump cover is a multi-component polyurethane foam structure, including an outer layer, an inner layer and an intermediate layer between the outer layer and the inner layer. The outer layer is a hard crust, the inner layer is a soft crust, and the middle layer The layer is an open cell soft foam material layer. The thickness of the hard crust is 3mm, the thickness of the soft crust is 0.5mm, and the density of the open-cell soft foam material layer is 120kg / m 3 .

[0049]The preparation method of the fuel pump cover in the engine compartment of the automobile needs two pairs of molding dies and two-step molding: the method includes the following steps:

...

Embodiment 2

[0073] A fuel pump cover in the engine compartment of an automobile, which matches the shape of the fuel pump in the engine compartment. The cover directly wraps engine components, especially engine components such as high-pressure fuel pumps and high-pressure fuel rails, without the need for a separate cover cover. The fuel pump cover is a multi-component polyurethane foam structure, including an outer layer, an inner layer and an intermediate layer between the outer layer and the inner layer. The outer layer is a hard crust, the inner layer is a soft crust, and the middle layer The layer is an open cell soft foam material layer. The thickness of the hard crust is 2mm, the thickness of the soft crust is 0.3mm, and the density of the open-cell soft foam material layer is 160kg / m 3 .

[0074] The preparation method of the fuel pump cover in the engine compartment of the automobile needs two pairs of molding dies and two-step molding: the method includes the following steps: ...

Embodiment 3

[0098] A fuel pump cover in the engine compartment of an automobile, which matches the shape of the fuel pump in the engine compartment. The cover directly wraps engine components, especially engine components such as high-pressure fuel pumps and high-pressure fuel rails, without the need for a separate cover cover. The fuel pump cover is a multi-component polyurethane foam structure, including an outer layer, an inner layer and an intermediate layer between the outer layer and the inner layer. The outer layer is a hard crust, the inner layer is a soft crust, and the middle layer The layer is an open-cell soft foam material layer. The thickness of the hard crust is 1.5mm, the thickness of the soft crust is 0.35mm, and the density of the open-cell soft foam material layer is 180kg / m 3 .

[0099] The preparation method of the fuel pump cover in the engine compartment of the automobile needs two pairs of molding dies and two-step molding: the method includes the following steps...

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Abstract

The invention relates to an automobile engine compartment internal fuel pump cover and a manufacturing method thereof. The cover is matched with a fuel pump in shape. The cover is characterized in that the fuel pump cover is of a double-layer structure, the outer layer is a hard crust, the inner layer comprises an inner surface layer of a soft crust and a middle layer which is between and connectsthe outer layer and the inner surface layer, and two-step molding is carried out through two molds. Compared with the prior art, the outer layer hard crust has the sound insulation property, the inner layer has the sound absorption function, and meanwhile has the characteristics of high temperature resistance, aging resistance and flame retardancy, and the fuel pump cover can achieve the effect of reducing noise.

Description

technical field [0001] The invention relates to a sound-absorbing and shock-absorbing part for automobiles, in particular to a fuel pump cover in an automobile engine compartment and a manufacturing method thereof. Background technique [0002] NVH (Noise, Vibration and Harshness) is a comprehensive issue to measure the quality of automobile manufacturing, and it gives the most direct feeling to automobile users. The NVH problem of vehicles is one of the concerns of major vehicle manufacturers and parts companies in the international automobile industry. Engine compartment noise is one of the main noise sources of automobile noise. If you want to reduce the noise of the whole vehicle, it is necessary to reduce the noise in the engine compartment. However, the fuel pump in the engine compartment of the automotive industry is generally exposed, and the working noise of the fuel pump It is one of the main noise sources in the engine compartment, and the shape of the matching a...

Claims

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Application Information

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IPC IPC(8): F04B53/16F02B77/13B29C44/08B29C44/60B29K71/00
Inventor 颜慧慧
Owner SHANGHAI XINAN CAR DEADENING FELT
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