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.
CN111186188AActive Publication Date: 2020-05-22DONGFENG MOTOR CORP HUBEI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
DONGFENG MOTOR CORP HUBEI
Publication Date
2020-05-22

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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.
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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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