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Sound-absorbing and heat-insulating pad of automobile engine compartment

An engine compartment and heat insulation pad technology, which is applied in the field of auto parts, can solve the problems of carbonization of sound-absorbing materials and reduce sound-absorbing performance, and achieve the effects of enhancing sound-absorbing effect, reducing noise and increasing effective sound-absorbing area.

Active Publication Date: 2020-05-22
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The structure of this patent is relatively simple, but the sound-absorbing pad is covered with aluminum foil, which improves the heat insulation performance, but greatly reduces its sound absorption performance. Aluminum foil is a good anti-heat material and also a good heat-conducting material. , easy to carbonize the sound-absorbing material on the cold side of the aluminum foil

Method used

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  • Sound-absorbing and heat-insulating pad of automobile engine compartment
  • Sound-absorbing and heat-insulating pad of automobile engine compartment
  • Sound-absorbing and heat-insulating pad of automobile engine compartment

Examples

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Embodiment 1

[0030] see figure 1 with figure 2 As shown, the embodiment of the present invention provides a sound-absorbing and heat-insulating pad for an automobile engine compartment, which includes a sound-absorbing pad body 1 and an aluminum heat-insulating layer 2. The position on the body 1 corresponds to the position of the heat source in the engine compartment. One side of the sound-absorbing pad body 1 is connected to the sheet metal of the cover of the engine compartment, and the near heat source area 10 on the other side faces the heat source in the engine compartment. The aluminum heat insulation layer 2 is located in the heat source area 10, which plays a role of heat insulation for the heat source in the engine compartment, preventing the heat generated by the heat source from damaging the sound-absorbing pad body 1 and affecting the sound-absorbing effect of the sound-absorbing pad body 1. Embodiment 1 of the present invention adopts the material composition of the existin...

Embodiment 2

[0044] The basic content of embodiment 2 of the present invention is the same as embodiment 1, and difference is:

[0045] The two side edges of the aluminum material heat insulation layer 2 of the embodiment 2 of the present invention are divided into the first part 20, and the two end edges of the aluminum material heat insulation layer 2 are divided into the second part 21, because the sound source in the engine compartment mainly concentrates on the aluminum Therefore, the two ends of the aluminum heat insulation layer 2 are used as the sound wave inlet 4, and the sound waves generated by the sound source are concentrated for sound absorption.

Embodiment 3

[0047] The basic content of embodiment 3 of the present invention is the same as embodiment 2, and difference is:

[0048] The cross-section of the aluminum heat insulation layer 2 in Example 3 of the present invention is trapezoidal, and the lower bottom of the trapezoid is close to the sound-absorbing pad body 1, that is, the diameter of the echo cavity 3 is from close to the sound-absorbing pad body 1 to away from the sound-absorbing pad body 1 The direction gradually decreases, so that the sound wave enters the echo cavity 3 from both ends of the aluminum heat insulation layer 2, and the sound wave with a small frequency has low energy, and it is reflected at the edge of the trapezoidal echo cavity 3 and the energy of the sound wave is further Reduced, the sound wave with reduced energy is reflected to the sound-absorbing pad body 1 to be absorbed; the sound wave with high frequency has high energy, propagates to the middle position of the trapezoidal echo chamber 3 and is ...

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Abstract

The invention discloses a sound-absorbing and heat-insulating pad of an automobile engine compartment, belonging to the technical field of automobile parts. The sound-absorbing and heat-insulating padcomprises: a sound-absorbing pad body having a near-heat-source area; and an aluminum heat-insulating layer, which is located in the near-heat-source area, wherein the edge of the aluminum heat-insulating layer is divided into a first part and a second part, the first part is connected with the sound-absorbing pad body so as to allow an echo cavity to be formed between the aluminum heat-insulating layer and the sound-absorbing pad body, and a sound wave inlet allowing sound waves to enter the echo cavity is formed between the second part and the sound-absorbing pad body and communicates withthe echo cavity. The sound-absorbing and heat-insulating pad utilizthese a conventional sound-absorbing pad and a conventional aluminum heat-insulating pad, the echo cavity is formed between the aluminum heat-insulating pad and the sound-absorbing pad only by allowing the aluminum heat-insulating pad to be arched, so cost is saved, the back-and-forth reflection energy of sound waves in the echo cavity is weakened, and meanwhile, the effects of heat insulation and sound absorption are achieved.

Description

technical field [0001] The invention relates to the technical field of automobile parts, in particular to a sound-absorbing and heat-insulating pad for an automobile engine compartment. Background technique [0002] With the development of high-performance automobiles, low emissions and low fuel consumption, the use of turbochargers is becoming more and more popular. Many models place turbochargers near the cockpit, and due to the layout space, the overhead air filter , causing the heat source and sound source of the engine to be closer to the cockpit, and the flow field is poor, and the heat and noise radiated from the front wall are relatively high. In order to improve driving comfort, it is required to reduce the influence of heat and noise on the environment inside the vehicle. [0003] Chinese Patent Publication No. CN201390215Y discloses a heat-insulating and sound-absorbing pad for automobiles, which mainly consists of a pad body, an aluminum foil layer arranged on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/02B32B27/36B32B27/42B32B27/12B32B27/08B32B5/02B32B7/12B32B15/20B32B15/14B32B5/06B32B3/28B32B33/00B32B37/06B32B38/00
CPCB32B3/28B32B5/022B32B5/06B32B5/26B32B7/12B32B15/14B32B15/20B32B33/00B32B37/06B32B38/00B32B2038/0096B32B2262/02B32B2262/0284B32B2307/10B32B2307/304B60R13/0838
Inventor 梁海明袁沐王月孔祥志李鑫
Owner DONGFENG MOTOR CORP HUBEI
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