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KR20070071989A - Dash panel with absorbing and excluding function of sounds - Google Patents

Dash panel with absorbing and excluding function of sounds Download PDF

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Publication number
KR20070071989A
KR20070071989A KR1020050135887A KR20050135887A KR20070071989A KR 20070071989 A KR20070071989 A KR 20070071989A KR 1020050135887 A KR1020050135887 A KR 1020050135887A KR 20050135887 A KR20050135887 A KR 20050135887A KR 20070071989 A KR20070071989 A KR 20070071989A
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South Korea
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sound absorbing
dash panel
engine room
insulating
absorbing
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KR1020050135887A
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Korean (ko)
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KR100765842B1 (en
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이문용
김은석
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주식회사 성우하이텍
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Priority to KR1020050135887A priority Critical patent/KR100765842B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/082—Engine compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/14—Dashboards as superstructure sub-units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/09—Reducing noise

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

A dash panel with a sound absorbing and shielding function is provided to absorb and shield noise and vibration having high frequency band by using an absorbing and shielding unit while a vehicle is driving. A dash panel comprises an absorbing and shielding unit(3) using a foamed aluminum foam is provided at one side of an engine room of a dash panel(1) that separates the engine room from a vehicle interior. The absorbing and shielding unit(3) comprises an absorbing and shielding member(7) formed by simply compressing the foamed aluminum foam having a plurality of pores(5), and a cover(9) fixes the absorbing and shielding member(7) to one side of the engine room of the dash panel(1) while exposing the absorbing and excluding member(7) inside the engine room.

Description

흡차음 기능을 갖는 대쉬패널{Dash Panel with Absorbing and Excluding Function of Sounds}Dash Panel with Absorbing and Excluding Function of Sounds

도 1은 본 발명의 실시예에 따른 흡차음 기능을 갖는 대쉬패널의 분해 사시도이다. 1 is an exploded perspective view of a dash panel having a sound absorbing and insulating function according to an embodiment of the present invention.

도 2는 본 발명에 적용되는 흡차음 유닛의 분해 사시도이다. 2 is an exploded perspective view of a sound absorbing and insulating unit applied to the present invention.

도 3은 본 발명의 실시예에 따른 흡차음 기능을 갖는 대쉬패널의 측 단면도이다. Figure 3 is a side cross-sectional view of the dash panel having a sound absorbing and insulating function according to an embodiment of the present invention.

도 4는 본 발명에 적용되는 흡차음 유닛의 흡차음 성능 그래프이다. 4 is a sound absorbing and insulating performance graph of the sound absorbing and insulating unit applied to the present invention.

본 발명은 흡차음 기능을 갖는 대쉬패널에 관한 것으로, 보다 상세하게는 차량의 엔진룸과 차실을 구획하는 대쉬패널의 엔진룸 측 일측에 발포 알루미늄 폼을 이용한 흡차음 유닛을 구성하여 차량 주행상태에서의 소음원인 엔진으로부터 발생되는 고주파 영역(약 350Hz 이상)의 소음 및 진동을 흡수 차단할 수 있도록 하는 흡차음 기능을 갖는 대쉬패널에 관한 것이다. The present invention relates to a dash panel having a sound absorbing and insulating function. More specifically, a sound absorbing and insulating unit using foamed aluminum foam is formed on one side of an engine room of a dash panel that divides an engine room and a vehicle compartment of a vehicle in a driving state. The present invention relates to a dash panel having a sound absorbing and insulating function for absorbing and blocking noise and vibration in a high frequency region (about 350 Hz or more) generated from an engine.

일반적으로 차량용 대쉬패널(dash panel)은 엔진룸과 차실을 구분하는 패널 로서, 조향장치, 페달류의 케이블 및 공조기의 덕트 등이 통과하도록 형성되며, 공조 유닛, 페달류 및 크래쉬 패드 등이 이에 조립된다.In general, a dash panel for a vehicle is a panel that separates the engine room from the cabin. The steering panel, the cables of the pedals, the ducts of the air conditioner, and the like are passed through, and the air conditioning unit, the pedals, and the crash pad are assembled there. do.

또한, 상기 대쉬패널은 엔진룸에서 발생하는 소음이 차실로 전달되지 않도록 차단하는 역할을 하기 때문에, 강성은 물론 음향학적 차음성능이 매우 중요하게 고려된다.In addition, since the dash panel serves to block the noise generated in the engine room from being transmitted to the vehicle compartment, the acoustic sound insulation performance is very important as well as the rigidity.

이를 위하여, 대쉬패널의 차실 측에는, 엔진 투과음을 저감시키기 위한 흡음재가 부착되거나, 차음성능을 높이기 위하여 흡음재의 표면에 차음재를 부착하기도 한다. To this end, a sound absorbing material for reducing the engine transmission sound is attached to the vehicle compartment side of the dash panel, or a sound insulating material is attached to the surface of the sound absorbing material in order to increase the sound insulating performance.

이와 같이 흡음재와 차음재를 함께 사용함으로써 차음성능의 효율을 높일 수 있으며, 상기 흡음재로는 폴리우레탄(polyurethane) 발포체 또는 섬유질 펠트(felt)가 사용되고 있으며, 특히 최근에는 흡음성능 및 단열성능의 향상을 위하여 폴리에틸렌테레프탈레이트(polyethylene terephatalate, 이하 PET라 함) 섬유가 사용되기도 한다.As such, the sound absorbing material and the sound absorbing material may be used together to increase the efficiency of the sound insulating material. As the sound absorbing material, polyurethane foam or fibrous felt is used. In particular, in recent years, in order to improve sound absorbing performance and heat insulating performance, Polyethylene terephatalate (PET) fibers are also used.

상기 차음재는 헤비 레이어(heavy layer)라고도 하며, 일반적으로 폴리비닐클로라이드(poly vinyl cholide, PVC), 고무(rubber) 또는 에틸렌비닐아세테이트(ethylene vinyl acetate, EVA)에 CaCO 3 및 BaSO 4 와 같은 무기질을 첨가한 재료가 사용되고 있다.The sound insulation material is also referred to as a heavy layer, and generally, inorganic materials such as CaCO 3 and BaSO 4 may be added to polyvinyl chloride (PVC), rubber, or ethylene vinyl acetate (EVA). The added material is used.

그러나, 상기와 같이 구성되는 대쉬패널의 흡차음 구조에서는 다음과 같은 문제점이 있다.However, the sound absorbing and insulating structure of the dash panel configured as described above has the following problems.

1) 투과손실을 증대시키기 위하여 적용되는 차음재 때문에 전체적인 차음구 조의 무게가 무겁다. 투과손실(TL:Transmission Loss)이란 음파가 투과되면서 발생되는 에너지 손실로서, 투과손실이 클수록 차음효과가 크게 나타난다. 즉, 일반적으로 투과손실을 크게 하려면 밀도가 크고 중량이 큰 재질을 사용하여야 하므로 성능증대를 위한 차음재를 설치하는 경우, 중량 증대가 불가피하다는 문제점이 있다.1) The overall sound insulation structure is heavy because of the sound insulation material applied to increase the transmission loss. Transmission Loss (TL) is an energy loss generated by the transmission of sound waves, and the larger the transmission loss, the larger the sound insulation effect. In other words, in order to increase the transmission loss in general, a material having a high density and a large weight should be used, so when installing a sound insulation material for increasing performance, there is a problem in that weight increase is inevitable.

2) 또한, 일치효과 때문에 고주파 대역에서의 투과손실이 떨어진다. 일치효과(Coincidence Effect)는 차음재의 벤딩 웨이브 스피드(bending wave speed)와 일치하는 주파수에서 투과손실이 저하되는 현상으로서, 높은 입사음압에 의해 차음재가 진동되면서 소음이 전달되므로 차음성능을 떨어뜨리는 원인이 된다.2) Also, due to the coincidence effect, the transmission loss in the high frequency band is reduced. Coincidence Effect is a phenomenon in which transmission loss decreases at a frequency coinciding with the bending wave speed of the sound insulation material. As the sound insulation material is vibrated by the high incident sound pressure, noise is transmitted, causing a decrease in sound insulation performance. do.

따라서 본 발명은 상기한 바와 같은 문제점을 해소하기 위하여 창출된 것으로써, 본 발명의 목적은 무게가 가벼우면서 고주파 영역(약 350Hz 이상)의 흡차음 성능이 우수한 발포 알루미늄 폼을 이용한 흡차음 유닛을 대쉬패널의 엔진룸 측 일측에 구성하여 차량 주행상태에서 엔진으로부터 발생되는 고주파 영역의 소음 및 진동을 흡수 차단할 수 있도록 하는 흡차음 기능을 갖는 대쉬패널을 제공하는 것이다.Therefore, the present invention was created in order to solve the above problems, and an object of the present invention is to dash the sound absorbing and insulating unit using foamed aluminum foam which is light in weight and excellent in sound absorbing and insulating performance in the high frequency region (about 350 Hz or more). It is provided on the side of the engine room side of the panel to provide a dash panel having a sound absorbing and insulating function to block the noise and vibration of the high frequency region generated from the engine in the vehicle running state.

상기한 바와 같은 목적을 달성하기 위한 본 발명에 따른 흡차음 기능을 갖는 대쉬패널은 차량의 엔진룸과 차실을 구획하는 대쉬패널의 엔진룸 측 일측에 발포 알루미늄 폼을 이용한 흡차음 유닛을 장착하여 이루어진다.The dash panel having a sound absorbing and insulating function according to the present invention for achieving the object as described above is made by mounting a sound absorbing and insulating unit using foamed aluminum foam on one side of the engine room side partitioning the engine room and the vehicle compartment of the vehicle. .

상기 흡차음 유닛은 다수개의 기공들을 갖는 발포 알루미늄 폼을 단순 압착 하여 구성되는 흡차음재; 상기 흡차음재를 엔진룸 내부로 노출시키면서 상기 대쉬패널의 엔진룸 측 일측에 고정하는 커버;로 이루어지는 것을 특징으로 한다.The sound absorbing and insulating unit comprises: a sound absorbing and insulating material configured by simply compressing a foamed aluminum foam having a plurality of pores; And a cover fixed to one side of the engine room side of the dash panel while exposing the sound absorbing and insulating material to the inside of the engine room.

상기 흡차음재는 그 외형이 사각단면의 육면체로 이루어지되, 대쉬패널에 대응하는 일면을 제외한 나머지면은 엔진룸에 누출된 상태로 내측으로 사각뿔 형상의 각진 홈을 형성하여 이루어지는 것을 특징으로 한다.The sound absorbing and insulating material is made of a hexahedron of the rectangular cross-section, the other surface except for one surface corresponding to the dash panel is characterized in that formed in the square pyramid-shaped angled groove inward in the state leaked in the engine room.

상기 흡차음재는 다수개의 기공들을 갖는 발포 알루미늄 폼을 단순 압착하여 구성하되, 상기 기공을 이루는 연결벽이 압착에 의해 찢어져서 형성되는 균열을 포함하는 것을 특징으로 한다.The sound absorbing and insulating material is configured by simply compressing the foamed aluminum foam having a plurality of pores, characterized in that it comprises a crack formed by the connection wall constituting the pores torn by compression.

상기 커버는 상기 흡차음재의 모서리부을 지지하도록 상기 모서리부를 따라 지지프레임을 서로 연결하여 형성되며, 대쉬패널에 대응하는 양측에는 용접을 위한 용접 플랜지를 형성하는 것을 특징으로 한다.The cover is formed by connecting the support frame to each other along the corner portion to support the corner portion of the sound absorbing and insulating material, characterized in that to form a welding flange for welding on both sides corresponding to the dash panel.

이하 본 발명의 바람직한 구성 및 작용을 첨부한 도면에 의거하여 보다 상세하게 설명하면 다음과 같다.Hereinafter, the preferred configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 흡차음 기능을 갖는 대쉬패널의 분해 사시도이고, 도 2는 본 발명에 적용되는 흡차음 유닛의 분해 사시도이며, 도 3은 본 발명의 실시예에 따른 흡차음 기능을 갖는 대쉬패널의 측 단면도이다. 1 is an exploded perspective view of a dash panel having a sound absorbing and insulating function according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a sound absorbing and insulating unit applied to the present invention, Figure 3 is a sound absorbing and insulating sound according to an embodiment of the present invention Side sectional drawing of the dash panel which has a function.

도 1에서와 같이, 본 발명의 실시예에 따른 흡차음 기능을 갖는 대쉬패널(1)은 차량의 엔진룸과 차실을 구획하는 대쉬패널(1)의 엔진룸 측 일측에 발포 알루미늄 폼을 이용한 흡차음 유닛(3)을 장착하여 이루어진다. As shown in FIG. 1, a dash panel 1 having a sound absorbing and insulating function according to an exemplary embodiment of the present invention uses a foamed aluminum foam on one side of an engine room side of a dash panel 1 partitioning an engine room and a vehicle compartment of a vehicle. It is made by mounting the sound insulation unit (3).

상기 흡차음 유닛(3)은, 도 3에서 도시한 바와 같이, 다수개의 기공(5)들을 갖는 발포 알루미늄 폼을 단순 압착하여 구성되는 흡차음재(7)와 상기 흡차음재(7)를 엔진룸 내부로 노출시키면서 상기 대쉬패널(1)의 엔진룸 측 일측에 고정하는 커버(9)로 구성된다. As illustrated in FIG. 3, the sound absorbing and insulating unit 3 includes a sound absorbing and insulating material 7 and a sound absorbing and insulating material 7 formed by simply compressing a foamed aluminum foam having a plurality of pores 5. The cover 9 is fixed to one side of the engine room side of the dash panel 1 while being exposed to.

여기서 상기 흡차음재(7)는, 도 2에서 도시한 바와 같이, 그 외형이 사각단면의 육면체로 이루어지는데, 대쉬패널(1)에 대응하는 일면을 제외한 나머지면은 엔진룸에 노출된 상태로 내측으로 사각뿔 형상의 각진 홈(13)을 형성하여 흡음면적을 최대화하는 구조로 형성되는 것이 바람직하다.Here, the sound absorbing and insulating material 7, as shown in Figure 2, the outer shape is made of a hexahedral of the rectangular cross-section, except for one surface corresponding to the dash panel 1, the remaining surface is exposed to the engine room inside It is preferable to form a square pyramid shaped groove 13 to have a structure to maximize the sound absorption area.

또한, 상기 흡차음재(7)는, 도 3에서 도시한 바와 같이, 다수개의 기공(5)들을 갖는 발포 알루미늄 폼을 단순 압착하여 구성하되, 상기 기공(5)을 이루는 연결벽이 압착에 의해 찢어져서 형성되는 균열(15)을 포함하는 구조를 갖는다.In addition, the sound absorbing and insulating material 7, as shown in Figure 3, is configured by simply compressing a foamed aluminum foam having a plurality of pores (5), the connection wall forming the pores (5) is torn by compression It has a structure including the crack 15 to be formed.

즉, 상기 흡차음재(7)에 형성되는 미세한 균열(15)은 소음의 흡음성을 더욱 높이는 효과를 갖는다.That is, the minute crack 15 formed in the sound absorbing and insulating material 7 has an effect of further improving sound absorption of noise.

그리고 상기 커버(9)는 상기 도 2에서 도시한 바와 같이, 상기 흡차음재(7)의 각 모서리부을 지지하도록 상기 모서리부를 따라 지지프레임을 서로 연결하여 형성되며, 상기 대쉬패널(1)에 대응하는 양측에는 용접을 위한 용접 플랜지(11)를 별도로 형성하여 구성된다. And the cover 9 is formed by connecting the support frame to each other along the corner portion to support each corner portion of the sound absorbing and insulating material (7), as shown in Figure 2, corresponding to the dash panel (1) Both sides are formed by separately forming a welding flange 11 for welding.

따라서, 상기한 바와 같은 구성을 갖는 흡차음 기능을 갖는 대쉬패널(1)은 상기 흡차음 유닛(3)의 흡차음 기능에 의해, 도 4에서 도시한 바와 같은 흡차음 성능을 나타내게 된다. Accordingly, the dashed panel 1 having the sound absorbing and insulating function having the above configuration exhibits the sound absorbing and insulating performance as shown in FIG. 4 by the sound absorbing and insulating function of the sound absorbing and insulating unit 3.

즉, 엔진의 주행 중에 발생하는 고주파 영역(약 350Hz 이상)에서 흡음률이 우수하며, 특히, 초기 가속시에 발생되는 약 250Hz ~ 500Hz 주파수대에서 최대의 흡음률을 나타내게 된다.That is, the sound absorption rate is excellent in the high frequency region (about 350 Hz or more) generated while the engine is running, and in particular, the maximum sound absorption rate is exhibited in the frequency band of about 250 Hz to 500 Hz generated during initial acceleration.

여기서 상기 도 4의 그래프에서 Air; 50, Air; 80이 나타내는 의미에 대하여 간단하게 언급하면, 흡차음 시험 시, 음원에 대응하여 시편을 위치시키고, 상기 음원의 반대측 시편의 배면에는 일정간격 이격되어 격벽을 구성하는데, 이때, 상기 격벽과 시편간의 공간부를 공기층이라 하고, 이 공기층의 폭을 mm 단위로 표시한 것으로, 이 공기층의 폭에 따라서도 다른 흡차음성을 나타내는 것을 알 수 있다. Where Air in the graph of FIG. 4; 50, Air; Briefly referring to the meaning of 80, in the sound absorbing and sound-proof test, the specimen is positioned corresponding to the sound source, and a partition is formed on the back side of the specimen opposite to the sound source at a predetermined interval, wherein the space between the partition and the specimen The part is called an air layer, and the width of the air layer is expressed in units of mm, and it can be seen that the sound absorbing and insulating sound performance is different depending on the width of the air layer.

또한, 상기한 흡차음 기능을 갖는 대쉬패널(1)은 그 흡차음재(7)가 발포 알루미늄 폼을 압착하여 구성함으로 무게가 현저하게 가벼우며, 이에 따른 일반적인 차음재와 같이, 중량을 고려해야 하는 단점을 해소할 수 있게 된다. In addition, the dash panel (1) having a sound absorbing and insulating function is characterized in that the weight of the sound absorbing and insulating material 7 is formed by compressing the foamed aluminum foam is significantly lighter, as in the general sound insulating material accordingly, the weight must be considered It can be solved.

상기한 바와 같은 본 발명의 흡차음 기능을 갖는 대쉬패널에 의하면, 고주파 영역(약 350Hz 이상)의 흡차음 성능이 우수한 발포 알루미늄 폼을 이용한 흡차음 유닛을 대쉬패널의 엔진룸 측 일측에 구성하여 차량 주행상태에서 엔진으로부터 발생되는 고주파 영역의 소음 및 진동을 흡수 차단할 수 있는 효과가 있다.According to the dashed panel having the sound absorbing and insulating function of the present invention as described above, the sound absorbing and sounding unit using the foamed aluminum foam having excellent sound absorbing and insulating performance in the high frequency region (about 350 Hz or more) is configured on one side of the engine room side of the dash panel. There is an effect that can absorb and block the noise and vibration in the high frequency region generated from the engine in the driving state.

또한, 무게가 가벼운 발포 알루미늄 폼을 이용하여 흡차음재를 구성함으로써 중량을 고려할 필요가 없다는 이점도 있다. In addition, by using a light weight foam aluminum foam to configure the sound absorbing and insulating material there is an advantage that does not need to consider the weight.

Claims (5)

차량의 엔진룸과 차실을 구획하는 대쉬패널의 엔진룸 측 일측에 발포 알루미늄 폼을 이용한 흡차음 유닛을 장착하여 이루어지는 흡차음 기능을 갖는 대쉬패널.A dash panel having a sound absorbing and insulating function formed by attaching a sound absorbing and insulating unit using foamed aluminum foam to one side of an engine room of a dash panel partitioning an engine room and a vehicle compartment of a vehicle. 제1항에 있어서, The method of claim 1, 상기 흡차음 유닛은 The sound absorbing and insulating unit 다수개의 기공들을 갖는 발포 알루미늄 폼을 단순 압착하여 구성되는 흡차음재;Sound absorbing and insulating material configured by simply pressing a foamed aluminum foam having a plurality of pores; 상기 흡차음재를 엔진룸 내부로 노출시키면서 상기 대쉬패널의 엔진룸 측 일측에 고정하는 커버;로 이루어지는 것을 특징으로 하는 흡차음 기능을 갖는 대쉬패널.And a cover fixed to one side of the engine room side of the dash panel while exposing the sound absorbing and insulating material to the inside of the engine room. 제2항에 있어서, The method of claim 2, 상기 흡차음재는 그 외형이 사각단면의 육면체로 이루어지되, 대쉬패널에 대응하는 일면을 제외한 나머지면은 엔진룸에 누출된 상태로 내측으로 사각뿔 형상의 각진 홈을 형성하여 이루어지는 것을 특징으로 하는 흡차음 기능을 갖는 대쉬패널.The sound absorbing and insulating material is made of a hexahedron with a rectangular cross-section, except for one surface corresponding to the dash panel, the remaining surface is formed by forming an angled groove in the shape of a square pyramid inward in the state leaked in the engine room. Dashboard with functions. 제2항에 있어서, The method of claim 2, 상기 흡차음재는 다수개의 기공들을 갖는 발포 알루미늄 폼을 단순 압착하여 구성하되, 상기 기공을 이루는 연결벽이 압착에 의해 찢어져서 형성되는 균열을 포함하는 것을 특징으로 하는 흡차음 기능을 갖는 대쉬패널.The sound absorbing and insulating material is configured by simply compressing a foamed aluminum foam having a plurality of pores, the connection wall constituting the pores comprises a crack formed by tearing by compression. 제2항에 있어서, The method of claim 2, 상기 커버는 상기 흡차음재의 모서리부을 지지하도록 상기 모서리부를 따라 지지프레임을 서로 연결하여 형성되며, 대쉬패널에 대응하는 양측에는 용접을 위한 용접 플랜지를 형성하는 것을 특징으로 하는 흡차음 기능을 갖는 대쉬패널.The cover is formed by connecting the support frame to each other along the corner portion to support the corner portion of the sound absorbing and insulating material, the dash panel having a sound absorbing and insulating function, characterized in that forming a welding flange for welding on both sides corresponding to the dash panel. .
KR1020050135887A 2005-12-30 2005-12-30 Dash Panel with Absorbing and Excluding Function of Sounds KR100765842B1 (en)

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KR980009005A (en) * 1998-02-28 1998-04-30 백중기 Sound absorbing and insulating sheet for automobile engine hood
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