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Sound-insulation structure of engine compartment

An engine and sound insulation technology, applied in the directions of transportation, packaging, vehicle parts, etc., can solve problems such as environmental noise pollution, and achieve the effects of reducing noise pollution, good sound insulation effect and low cost.

Inactive Publication Date: 2010-12-08
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that sound insulation materials are usually only installed on the cover plate and firewall side of the engine compartment, causing noise pollution to the environment, and to provide a sound insulation material on both sides and bottom of the engine compartment, which can ensure the sound quality of the engine compartment. Engine compartment sound insulation structure for compartment ventilation

Method used

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  • Sound-insulation structure of engine compartment

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: A sound insulation structure of an engine compartment, such as figure 1 , figure 2 , image 3 shown. The rear side of the engine compartment is a firewall 4, the upper side is a cover plate 1, the left and right sides are front wheel cover plates 2, the front side is a radiator, and the front side has an air inlet. The front side of the firewall 4, the lower side of the cover plate 1 and the inner side of the front wheel cover 2 are all provided with a sound insulation layer. The material layer is a glass fiber layer, and the sound-insulating material layer is a sound-insulating felt, and the above-mentioned sound-insulating layers are fixed by buckles. The lower side of the engine compartment has a sound insulation grille 3 arranged horizontally, and the sound insulation grille 3 has a structure such as figure 2 As shown, it includes a rectangular outer frame 32 and grid pages 31 installed on the outer frame 32. There are five grid pages 31 in total...

Embodiment 2

[0024] Embodiment 2, a sound insulation structure of the engine compartment, such as figure 1 , figure 2 , Figure 4 shown. In this embodiment, the grid leaf 31 of the sound insulation grid plate 3 has a double-layer structure. The lower side of the grid leaf 31 is a plastic skeleton layer 312, and the upper side is a sound insulation layer 311. The skeleton layer 312 and the sound insulation layer 311 are glued together. Sticking way is fixed together, and other structures are all the same as in embodiment 1.

[0025] Such as Figure 4 As shown, the noise is absorbed by the sound insulation layer 311 during the downward propagation process, which can effectively reduce the noise in this direction, and the sound insulation layer 311 can absorb and weaken the noise when the noise diffuses through the ventilation hole 33 .

Embodiment 3

[0026] Embodiment 3, a kind of sound insulation structure of engine compartment, such as figure 1 , figure 2 , Figure 5 shown. In this embodiment, the grid leaf 31 of the sound insulation grid plate 3 has a double-layer structure. The upper side of the grid leaf 31 is a plastic skeleton layer 312, and the lower side is a sound insulation layer 311. The skeleton layer 312 and the sound insulation layer 311 are glued together. Sticking way is fixed together, and other structures are all the same as in embodiment 1.

[0027] Such as Figure 5 As shown, in this example, the skeleton layer is located above the sound insulation layer, and the oil leaked from the engine will flow out along the ventilation holes after dripping, which will not cause corrosion to the sound insulation layer, and the sound insulation layer can also reduce noise.

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Abstract

The invention relates to a structure of an engine compartment, in particular to a sound-insulation structure of an engine compartment, which can effectively reduce noises and solves the problem that because only a cover plate and a fire division wall of the engine compartment are provided with sound-insulation materials, environmental noise pollution is caused. The sound-insulation structure comprises a fire division wall, front-wheel shield plates and a cover plate, wherein the fire division wall is positioned at the back side of the engine compartment, the front-wheel shield plates are positioned at the left side and the right side of the engine compartment, and the cover plate is positioned at the upper side of the engine compartment. The sound-insulation structure is characterized in that the front side of the fire division wall, the inner sides of the front-wheel shield plates and the lower side of the cover plate are all provided with sound-insulation layers, and the lower side of the engine compartment is also provided with a sound-insulation grid plate with a ventilating hole. Under the condition of not changing the structure of the traditional engine compartment, the sound-insulation structure realizes low cost and can effectively prevent the noises from spreading into the engine and ambient environment and ensure the ventilation and the heat dissipation of the engine compartment, and the sound-insulation grid plate can be also used as a collision-preventing plate at the bottom side of the engine compartment to prevent flying stones from colliding the engine compartment.

Description

technical field [0001] The invention relates to an engine compartment structure, in particular to an engine compartment sound insulation structure capable of effectively reducing noise. technical background [0002] Automobile noise control is one of the important contents of automobile performance development. The engine compartment is an area where noise sources are concentrated. The noise treatment structure of the engine compartment is closely related to the noise level of the vehicle. The usual practice is to install sound-absorbing and sound-insulating materials on the engine compartment cover and the firewall behind the engine compartment to reduce the noise level. However, the noise radiation in other directions of the engine compartment is often ignored, causing noise pollution to the surrounding environment. If sound insulation materials are installed in all directions of the engine compartment, then there will be problems with the ventilation of the engine compart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R13/08
Inventor 姚运仕冯忠绪李刚郭冬梅张庆军陈世荣孔令彬王海林刘强马芳武李书福杨健赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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