CN216332315U

CN216332315U - Sound insulation engine hood, engine compartment assembly and vehicle

Info

Publication number: CN216332315U
Application number: CN202123212167.9U
Authority: CN
Inventors: 林世才; 王晨辉
Original assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-04-19
Anticipated expiration: 2031-12-17

Abstract

The application discloses engine hood, engine compartment assembly and vehicle give sound insulation, engine hood gives sound insulation includes: the engine hood and give sound insulation and fill up the body, the engine hood includes the internal surface towards the engine compartment, give sound insulation and fill up the body including the first face towards the engine compartment, and the second face towards the engine hood, the internal surface at the engine hood is connected in the laminating of second face, be provided with a plurality of archs on the first face, form the sunk space between two arbitrary adjacent archs, increase the area of contact in sound insulation pad body and engine compartment, increase the sound absorption performance of sound insulation pad body, thereby improve the sound absorption performance of the bonnet that gives sound insulation, increase the syllable-dividing effect of the bonnet that gives sound insulation.

Description

Sound insulation engine hood, engine compartment assembly and vehicle

Technical Field

The application relates to the technical field of automobiles, in particular to a soundproof engine hood, an engine compartment assembly and a vehicle.

Background

At present, the engine hood sound insulation pad is mainly made of phenolic resin felt, glass fiber felt and light PU (polyurethane) foam. The phenolic resin felt has general acoustic performance, high weight and poor VIAQ (air quality in a vehicle), does not meet the light-weight and environment-friendly green travel concept, and gradually quits practical application. The weight of the glass fiber felt is general, the influence on boiler equipment is large in actual production, the physical health of operators is threatened, and the glass fiber felt material cannot be recycled. Meanwhile, in practical application, the glass fiber material is easy to age, and dust pollution is easy to influence the health of the passenger compartment through an air inlet of the air conditioner. The mainstream material at present is light PU foaming material, which is light in weight, simple in forming and excellent in performance, and gradually becomes an industry trend.

The existing light PU foaming type is mainly finished by hot-pressing and compounding a light PU flat plate raw material and non-woven fabrics covered on the front and back sides, and the light PU flat plate raw material is mainly obtained by slicing PU box body bread. Because the light PU material has more fragile properties, the material cannot generate large profile stretching in the actual design process, the acoustic contact area is influenced, and the sound absorption performance of NVH (Noise, Vibration, Harshness, Noise, Vibration and Harshness) cannot be fully exerted.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a soundproof hood, an engine compartment assembly and a vehicle.

The application provides a sound insulating engine cover, includes:

a hood including an inner surface facing an engine compartment;

the sound insulation pad body comprises a first board surface facing an engine compartment and a second board surface facing the engine hood, and the second board surface is attached to the inner surface of the engine hood;

a plurality of bulges are arranged on the first plate surface, and a concave space is formed between any two adjacent bulges.

Optionally, the plurality of protrusions are uniformly arranged on the first plate surface at intervals and are arranged in a wave shape.

Optionally, the plurality of protrusions are distributed over the entire first plate surface.

Optionally, the outer diameter of each protrusion gradually decreases in a direction away from the first plate surface.

Optionally, an end surface of each protrusion facing away from the first plate surface is a convex arc surface.

Optionally, the fabric further comprises non-woven fabrics;

the non-woven fabric is attached to the wavy curved surface formed by the bulges and the sunken spaces, and/or attached to the second board surface.

Optionally, the heat insulation layer is further included;

the thermal-insulating layer is attached to the outer surface of the non-woven fabric.

Optionally, the paint also comprises a hydrophobic layer; the hydrophobic layer is attached to the outer surface of the heat insulation layer.

The present application further provides a nacelle assembly including a nacelle and further including a soundproof hood as described above, the soundproof hood being openably and closably mounted on the nacelle, the protrusion being provided toward the nacelle.

The present application further provides a vehicle comprising a body and further comprising an engine compartment assembly as described above, the engine compartment assembly being mounted on the body.

The beneficial effect of this application:

the application provides a bonnet that gives sound insulation, engine compartment assembly and vehicle, the bonnet that gives sound insulation includes: the engine hood and give sound insulation and fill up the body, the engine hood includes the internal surface towards the engine compartment, give sound insulation and fill up the body including the first face towards the engine compartment, and the second face towards the engine hood, the internal surface at the engine hood is connected in the laminating of second face, be provided with a plurality of archs on the first face, form the sunk space between two arbitrary adjacent archs, increase the area of contact in sound insulation pad body and engine compartment, increase the sound absorption performance of sound insulation pad body, thereby improve the sound absorption performance of the bonnet that gives sound insulation, increase the syllable-dividing effect of the bonnet that gives sound insulation.

Drawings

FIG. 1 is a schematic structural view of a soundproof hood according to an embodiment of the present application;

FIG. 2 is a schematic structural view of an acoustic insulator mat body according to an embodiment of the present application;

fig. 3 is a schematic view of the formation of the sound-insulating mat body according to the embodiment of the present application.

Detailed Description

The technical solutions of the present application are described in detail below with reference to the accompanying drawings and specific embodiments. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Fig. 1 is a schematic structural view of a soundproof hood according to an embodiment of the present application. As shown in fig. 1, the present application provides a soundproof hood comprising: a hood 10, the hood 10 including an inner surface facing an engine compartment, an acoustic insulating mat body 20, the acoustic insulating mat body 20 including a first panel surface 21 facing the engine compartment and a second panel surface 22 facing the hood 10, the second panel surface 22 being attached to the inner surface of the hood 10; the first plate surface 21 is provided with a plurality of protrusions 30, and a concave space 31 is formed between any two adjacent protrusions 30, so that the first plate surface 21 of the sound insulation pad body 20 is uneven, and the strength of the sound insulation pad body 20 can be increased.

Be provided with a plurality of archs 30 on the first face 21, protruding 30 increases the area of contact of sound insulation pad body 20 and engine compartment to improve the sound absorption performance of sound insulation pad body 20, increase the syllable-dividing effect of the hood that gives sound insulation.

In an optional embodiment of the present application, the sound insulation pad body 20 can be made of polyurethane foam or melamine foam, the protrusions 30 are solid, the strength and stretchability of the sound insulation pad body 20 are increased, the protrusions 30 with the same bulk density are produced by adopting the extrusion rolling foaming principle, and different from the traditional flat plate with the same surface density, the sound insulation pad has a larger sound absorption area.

The structure that arch 30 and sunken space 31 on the sound insulation pad body 20 formed can increase the refraction of sound wave, and the refraction in-process can absorb sound wave energy to a greater extent, reaches the purpose of decay sound wave, has realized better syllable-dividing effect.

The application provides a sound insulating engine cover, includes: the engine hood 10 and give sound insulation and fill up body 20, the engine hood 10 is including the internal surface towards the engine compartment, give sound insulation and fill up body 20 including the first face 21 towards the engine compartment and orientation the second face 22 of engine hood 10, the laminating of second face 22 is connected the internal surface of engine hood 10, be provided with a plurality of archs 30 on the first face 21, arbitrary adjacent two form concave space 31 between the arch 30, increase the area of contact of giving sound insulation and filling up body 20 and engine compartment, increase the sound absorption performance of giving sound insulation and filling up body 20 to improve the sound absorption performance of giving sound insulation the engine hood, increase the sound absorption effect that gives sound insulation the engine hood.

Optionally, a plurality of the protrusions 30 are uniformly arranged on the first plate surface 21 at intervals and are arranged in a wave shape, so that the strength of the sound insulation pad body 20 is increased, the sound insulation pad body 20 is uniformly stressed, and the service life is prolonged.

In an alternative embodiment of the present application, as shown in fig. 3, by adjusting the parameters of the roller on the foam extrusion device and designing reasonable values of the protrusions 30, the sound absorption performance of the acoustic pad body 20 is optimized, and at the same time, the air turbulence of the engine compartment is enhanced, and the air cooling efficiency is improved.

Optionally, it is a plurality of the arch 30 is covered with whole first face 21, increases the intensity of sound insulating pad body 20, further increases the area of contact of sound insulating pad body 20 and engine compartment, increases the sound absorption performance of sound insulating hood.

In an optional embodiment of the present application, the forming of the sound insulation pad body 20 is different from the previous flat-type foamed sound insulation pad that is formed by foaming the box body and then slicing the sound insulation pad in the thickness direction, the sound insulation pad body 20 is formed by extrusion and rolling, and then slicing in the length and width directions is performed according to actual needs, the thickness of each sound insulation pad body 20 is the same, and only the peripheral size needs to be cut according to needs, so that the efficiency is high, and the cost is low.

Optionally, the outer diameter of each protrusion 30 gradually decreases along a direction away from the first plate surface 21, so as to facilitate forming.

In an alternative embodiment of the present application, as shown in fig. 2 and 3, the contact surface of the protrusion 30 with the engine compartment is smooth, so that the force applied to the acoustic insulator mat body 20 is smooth.

Optionally, the end surface of each protrusion 30 facing away from the first plate surface 21 is a convex arc surface 32, so as to increase the contact area between the protrusion 30 and the engine compartment.

In an alternative embodiment of the present application, a cross section of the protrusion 30 perpendicular to the first plate surface 21 is substantially elliptical, and the surface of the protrusion 30 is flat, which facilitates processing and forming.

Optionally, the soundproof hood further includes a non-woven fabric 40, and the non-woven fabric 40 is attached to the wavy curved surface formed by the protrusion 30 and the concave space 31, and/or attached to the second panel 22, so as to increase the waterproof property of the hood.

In an alternative embodiment of the present application, the non-woven fabric 40 is two layers, and is selected to be black, and covers the surface of the soundproof pad body 20, so that the overall appearance of the soundproof hood is low.

Optionally, the soundproof hood further comprises a heat insulation layer 50, and the heat insulation layer 50 is attached to the outer surface of the non-woven fabric 40 to increase the heat insulation performance of the soundproof hood.

In an alternative embodiment of the present application, the thermal insulation layer 50 may be a micro-perforated aluminum foil, which is light and thin and has good thermal insulation.

The non-woven fabric 40 and the thermal insulation layer 50 are attached to the first plate surface 21 and the second plate surface 22 of the sound insulation pad body 20 by a hot press molding process after the sound insulation pad body 20 is roll-formed. Meanwhile, the problems of acoustic performance and thermodynamic heat dissipation of the automobile engine hood are solved, the structure is simple enough, and the forming is convenient.

Optionally, the soundproof engine cover further comprises a hydrophobic layer; the hydrophobic layer is attached to the outer surface of the heat insulation layer 50, and the waterproof performance of the soundproof engine cover is further improved.

In an alternative embodiment of the present application, the hydrophobic layer may be made of polyurethane material and is sprayed on the outer surface of the thermal insulation layer 50.

The application still provides an engine compartment assembly, including engine compartment, still include as above the engine hood gives sound insulation, the engine hood gives sound insulation installs openly the ground on the engine compartment, protruding 30 orientation the engine compartment sets up, increases the area of contact of engine hood and engine compartment gives sound insulation, increases the sound absorption performance of engine hood gives sound insulation.

The application still provides a vehicle, including the automobile body, still include as above engine compartment assembly, engine compartment assembly installs on the automobile body, increase the sound absorption performance of the bonnet that gives sound insulation to improve the sound absorption performance of whole car, improve personnel's in the car use and experience.

The utility model provides a vehicle including automobile body and engine compartment assembly, engine compartment assembly includes engine compartment and the engine hood that gives sound insulation, the engine hood that gives sound insulation includes engine hood 10 and sound insulation pad body 20, engine hood 10 includes the internal surface towards the engine compartment, sound insulation pad body 20 includes the first face 21 towards the engine compartment, and the second face 22 towards engine hood 10, the internal surface at engine hood 10 is connected in the laminating of second face 22, be provided with a plurality of archs 30 on the first face 21, form sunk space 31 between two arbitrary adjacent archs 30, increase the area of contact of sound insulation pad body 20 and engine compartment, increase the sound absorption performance of sound insulation pad body 20, thereby improve the sound absorption performance of sound insulation engine hood, increase the syllable-dividing effect of sound insulation engine hood.

The technical solutions of the present application are described in detail with reference to specific embodiments, which are used to help understand the ideas of the present application. The derivation and modification made by the person skilled in the art on the basis of the specific embodiment of the present application also belong to the protection scope of the present application.

Claims

1. An acoustic hood, comprising:

a hood including an inner surface facing an engine compartment;

2. A sound insulating hood as set forth in claim 1 wherein said plurality of protrusions are evenly spaced on said first panel and are arranged in an undulating pattern.

3. An acoustic hood as set forth in claim 2 wherein said plurality of said projections extend across said first panel surface.

4. A sound insulating hood as set forth in claim 3 wherein each of said projections has an outer diameter that decreases in a direction away from said first panel surface.

5. An acoustic hood as set forth in claim 4 wherein the end surface of each of said projections facing away from said first panel surface is a convexly curved surface.

6. A sound insulating hood as set forth in claim 5 further comprising a non-woven fabric;

7. An acoustic hood as set forth in claim 6 further comprising an insulating layer;

8. An acoustic hood as set forth in claim 7 further comprising a hydrophobic layer; the hydrophobic layer is attached to the outer surface of the heat insulation layer.

9. An engine compartment assembly comprising an engine compartment, further comprising a sound insulating hood as claimed in any one of claims 1 to 8 openably mounted on said engine compartment, said projection being disposed toward said engine compartment.

10. A vehicle comprising a body, further comprising the engine compartment assembly of claim 9 mounted to the body.