KR100916448B1 - device for improving aerodynamic performance of lower part of car - Google Patents

device for improving aerodynamic performance of lower part of car Download PDF

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Publication number
KR100916448B1
KR100916448B1 KR1020070131777A KR20070131777A KR100916448B1 KR 100916448 B1 KR100916448 B1 KR 100916448B1 KR 1020070131777 A KR1020070131777 A KR 1020070131777A KR 20070131777 A KR20070131777 A KR 20070131777A KR 100916448 B1 KR100916448 B1 KR 100916448B1
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South Korea
Prior art keywords
vehicle
flange
spare tire
present
tire well
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KR1020070131777A
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Korean (ko)
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KR20090064196A (en
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백승진
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현대자동차주식회사
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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
    • B62D25/20—Floors or bottom sub-units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D35/00—Vehicle bodies characterised by streamlining
    • B62D35/02—Streamlining the undersurfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D37/00—Stabilising vehicle bodies without controlling suspension arrangements
    • B62D37/02—Stabilising vehicle bodies without controlling suspension arrangements by aerodynamic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D43/00—Spare wheel stowing, holding, or mounting arrangements
    • B62D43/02—Spare wheel stowing, holding, or mounting arrangements external to the vehicle body
    • B62D43/04—Spare wheel stowing, holding, or mounting arrangements external to the vehicle body attached beneath the vehicle body
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S180/00—Motor vehicles
    • Y10S180/903—Airstream reactive vehicle or vehicle structure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

본 발명은 자동차 하부의 공력 성능 개선장치에 관한 것으로, 자동차의 후방 하부에 배치된 스페어타이어웰(4)의 표면에 직선형의 플랜지(7)를 차량 전후방향으로 설치한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for improving aerodynamic performance in a lower part of a vehicle, and installs a straight flange (7) in a front and rear direction on a surface of a spare tire well (4) disposed at a rear lower portion of a vehicle.

상기 플랜지(7)에 의해 차량 하부의 양력과 항력이 감소하여 주행 성능과 연비가 개선된다.The flange 7 reduces the lifting force and drag of the lower part of the vehicle, thereby improving driving performance and fuel economy.

차량 공력, 차량 양력, 차량 항력 Vehicle aerodynamic, vehicle lift, vehicle drag

Description

자동차 하부의 공력 성능 개선장치{device for improving aerodynamic performance of lower part of car}Device for improving aerodynamic performance of lower part of car}

본 발명은 자동차 주행 중 자동차 하부에 발생하는 공력 특성을 주행에 유리하도록 개선하는 자동차 하부의 공력 성능 개선장치에 관한 것이다.The present invention relates to an apparatus for improving aerodynamic performance of a vehicle undercarriage that improves aerodynamic characteristics occurring in the undercarriage while driving a vehicle to favor driving.

자동차의 하부에는 도 1 내지 도 3에 도시된 바와 같이, 플로어패널(1)의 하면으로 배기파이프(2), 머플러(3), 스페어타이어웰(4) 등이 설치되어 주행시 공기와 접촉하여 다양한 유동을 발생시킨다.As shown in FIGS. 1 to 3, an exhaust pipe 2, a muffler 3, a spare tire well 4, and the like are installed on a lower surface of the floor panel 1 to contact the air while driving. Generate flow.

특히 차량 후방에 위치한 스페어타이어웰(4)은 넓은 면적을 차지하고 있기 때문에 자동차 하부의 공력 특성에 큰 영향을 주는 구성요소이다.In particular, since the spare tire well 4 located in the rear of the vehicle occupies a large area, it is a component that greatly affects the aerodynamic characteristics of the underside of the vehicle.

상기 스페어타이어웰(4)의 하면은 기능 및 구조적 강성을 위해 소정 형상으로 포밍(forming)되어 있으나, 대체로 평평한 구조로 이루어져 있다.The bottom surface of the spare tire well 4 is formed into a predetermined shape for function and structural rigidity, but has a generally flat structure.

또한, 스페어타이어웰(4)과 리어범퍼(5) 사이에 존재하는 공간으로 인해 유동의 직진성이 저하되어 리어범퍼(5) 후방의 압력이 불안정하게 되어 주행에 악영향을 미치는 것을 해소하기 위하여 도 4와 같이 별도의 언더커버(6)를 장착하기도 한다.In addition, due to the space present between the spare tire well 4 and the rear bumper 5, the straightness of the flow is lowered, so that the pressure behind the rear bumper 5 becomes unstable, so as to eliminate adverse effects on running. Likewise, a separate undercover 6 may be mounted.

그런데, 상기 언더커버(6)는 넓은 면적을 커버하는 부품이므로 차량 중량과 원가 상승량이 증대되는 문제점이 있었다.However, since the undercover 6 is a part covering a large area, there is a problem in that the vehicle weight and the cost increase amount are increased.

이에 본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 언더커버를 설치하지 않고 차량 하부의 공력 특성을 개선하여 차량의 주행 성능을 향상시키고, 중량과 원가가 절감되며, 연비도 개선될 수 있도록 된 자동차 하부의 공력 성능 개선장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, improve the aerodynamic characteristics of the lower part of the vehicle without installing the undercover to improve the running performance of the vehicle, reduce weight and cost, and also improve fuel economy It is an object of the present invention to provide a device for improving aerodynamic performance under the vehicle.

상기와 같은 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,

스페어타이어웰이 차체의 후방 하면으로 노출된 자동차에 있어서,In a vehicle in which the spare tire well is exposed to the rear lower surface of the vehicle body,

상기 스페어타이어웰의 하면에 차량 전후 방향으로 직선형 플랜지가 장착된 것을 특징으로 한다.A straight flange is mounted on the lower surface of the spare tire well in the front-rear direction of the vehicle.

또한, 상기 플랜지는 일정 간격으로 복수 개 형성된 것을 특징으로 한다.In addition, the flange is characterized in that a plurality formed at a predetermined interval.

상기와 같은 구성의 본 발명에 따르면, 차량 하부의 양력과 항력이 감소하여 차량의 주행이 원활히 이루어지며, 그에 따라 연료 소비량도 감소하게 된다.According to the present invention having the configuration described above, the lift and drag of the lower portion of the vehicle is reduced to facilitate the running of the vehicle, thereby reducing the fuel consumption.

또한, 종래의 언더커버와 같은 중량 부품을 사용하지 않게 됨으로써 차중과 원가가 절감되는 효과가 있으며, 중량 감소에 의하여 연비 개선 효과는 배가된다.In addition, by not using a weight component such as the conventional undercover, there is an effect of reducing the weight and cost, and by the weight reduction, the fuel efficiency improvement effect is doubled.

이하, 본 발명을 첨부된 예시도면을 참조하여 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

도 5,6,7은 본 발명이 적용된 차량 후방 하면을 다양한 각도에서 도시한 것이다.5, 6, and 7 show the rear surface of the vehicle to which the present invention is applied from various angles.

도시된 바와 같이 본 발명은, 차량의 후방 하면의 중앙에 배치되고, 넓은 면적을 차지하는 스페어타이어웰(4)에 차량 전후 방향으로 플랜지(7)가 형성된 것을 특징으로 한다.As shown, the present invention is characterized in that the flange 7 is formed in the spare tire well 4 disposed in the center of the rear lower surface of the vehicle and occupies a large area.

상기 플랜지(7)는 직사각형 판재로서, 판재의 두께를 이루는 부분이 스페어타이어웰(4)에 장착된 구조로 장착된다.The flange 7 is a rectangular plate, and is mounted in a structure in which a portion constituting the thickness of the plate is mounted on the spare tire well 4.

예를 들어, 상기 플랜지(7)는 차량 전후 방향의 길이가 400mm이고, 좌우방향 길이 즉, 폭이 10mm이며, 상하방향 길이 즉, 높이가 50mm인 직사각형 판재이다.For example, the flange 7 is a rectangular plate having a length of 400 mm in the front and rear direction of the vehicle, a length of 10 mm in the horizontal direction, and a width of 10 mm, and a length of 50 mm in the vertical direction.

상기 플랜지(7)의 각 방향 치수는 차종에 따라 유동해석을 통해 최적화될 수 있다.Each directional dimension of the flange 7 can be optimized through flow analysis according to the vehicle model.

또한, 유동해석을 통해서 상기 플랜지(7)의 설치 개수와 설치 방향에 변화를 줄 수도 있다.In addition, the flow analysis may change the number of installation and the installation direction of the flange (7).

즉, 도면에 도시된 실시예는 상기 플랜지(7)가 소정 간격 이격되어 2개 설치된 것이나, 상기 플랜지(7)가 복수 개 배열될 수 있음은 물론이다.That is, the embodiment shown in the drawing is provided with two flanges 7 spaced apart from each other by a predetermined interval, but of course, a plurality of flanges 7 may be arranged.

이하, 종래기술과 플랜지(7)가 형성된 본 발명의 유동해석 결과를 비교하면서 본 발명의 효과를 확인해 본다.(도 8 내지 도 12에서 (a)는 종래기술의 유동해석 결과이고, (b)는 본 발명의 유동해석 결과이다.)Hereinafter, the effect of the present invention will be confirmed by comparing the flow analysis results of the present invention with the flange 7 having the prior art. (A) in FIGS. 8 to 12 are the flow analysis results of the prior art, and (b). Is the result of the flow analysis of the present invention.)

도 8은 스페어타이어웰(4)의 하면에 형성되는 압력분포를 나타낸 것으로, 청 색이 짙어질수록 낮은 압력상태임을 나타낸다.FIG. 8 shows the pressure distribution formed on the lower surface of the spare tire well 4, and the darker the blue color, the lower the pressure.

도시된 바와 같이 (a) 보다 (b)의 경우에 스페어타이어웰(4)의 외곽 부분에 보다 강하고 넓은 청색부분이 나타남을 확인할 수 있다. 즉, 종래기술보다 본 발명의 경우에 스페어타이어웰(4)의 하면에 압력이 보다 작은 값으로 형성됨을 알 수 있다.As shown in the case of (b) than in (a) it can be seen that a stronger and wider blue portion appears in the outer portion of the spare tire well (4). That is, in the case of the present invention than the prior art it can be seen that the pressure is formed to a lower value on the lower surface of the spare tire well (4).

또한, 도 9는 스페어타이어웰(4)의 표면 유선 분포를 도시한 것으로, 종래의 경우(a)에 비하여 본 발명의 경우(b)에는 상기 플랜지(7)의 주변에 3차원적 거동이 발생함을 알 수 있다.In addition, FIG. 9 shows the distribution of the surface streamline of the spare tire well 4, and in the case of the present invention (b) in comparison with the conventional case (a), three-dimensional behavior occurs around the flange 7. It can be seen that.

따라서, 종래의 경우보다 본 발명의 경우에는 유동에 하방으로 향하는 힘이 증가된 상태이다.Therefore, in the case of the present invention than the conventional case, the downward force in the flow is increased.

이는 와(vortex)도 분포를 나타낸 도 10에서 알 수 있는 바와 같이, 종래(a)에는 와도가 거의 나타나지 않으나 본 발명(b)에는 와도가 크게 발생하는 것으로부터도 확인할 수 있다.As can be seen from FIG. 10 showing the vortex degree distribution, the vortex is hardly seen in the conventional (a), but it can be confirmed from the fact that the vortex is largely generated in the present invention (b).

상기와 같이, 상기 플랜지(7)를 형성함으로써 자동차 하부의 압력이 감소하고, 아래쪽으로 향하는 힘이 증가하여, 양력이 감소함을 알 수 있다.As described above, it can be seen that by forming the flange 7 the pressure in the lower part of the vehicle is reduced, and the downward force is increased, so that the lifting force is reduced.

한편, 도 11은 상기 플랜지(7) 주변의 유선 분포도로서, 플랜지가 없는 종래의 경우(a)에는 차량의 후단에 이르러서 유동이 급격히 흐트러짐을 알 수 있으나, 플랜지가 형성된 본 발명의 경우(b)에는 플랜지(7)를 통과하면서 흐름이 한층 안정화되고 직선화되어 차량의 후단에 이르러서도 유동이 흐트러지지 않고 안정적인 직선형 흐름 상태를 유지함을 알 수 있다.On the other hand, Figure 11 is a distribution diagram of the streamline around the flange (7), in the conventional case without the flange (a) it can be seen that the flow is sharply disturbed to reach the rear end of the vehicle, but in the case of the present invention in which the flange is formed (b) It can be seen that the flow is further stabilized and straightened while passing through the flange 7 so that the flow is not disturbed even when reaching the rear end of the vehicle and the stable straight flow state is maintained.

이와 같이 플랜지(7)의 설치로 인하여 차량 하부 유동의 직진성이 향상되어 리어범퍼 후방의 압력 회복량이 좋아진다.In this way, the installation of the flange 7 improves the straightness of the lower flow of the vehicle, thereby improving the amount of pressure recovery behind the rear bumper.

도 12는 리어범퍼(5) 후방의 압력 분포도로서, 황색일수록 고압을 나타낸다.FIG. 12 is a pressure distribution diagram behind the rear bumper 5, and yellow indicates high pressure.

(a)의 경우와 (b)의 경우를 비교해 보면, (a)의 경우에 유동 교란으로 인해 리어범퍼(5) 후면에 고압이 형성됨을 알 수 있고, (b)의 경우에 푸른색으로 나타난 것으로 보아 상대적으로 저압이 형성되었음을 알 수 있다.Comparing the case of (a) with the case of (b), it can be seen that in the case of (a), a high pressure is formed on the rear of the rear bumper 5 due to the flow disturbance. It can be seen that a relatively low pressure is formed.

즉, 본 발명에 의해 유동의 직진성이 향상됨으로써 리어범퍼(5) 후면의 압력 회복량이 좋아짐으로써 항력이 감소함을 알 수 있다.In other words, it can be seen that the drag is reduced by improving the straightness of the flow according to the present invention, thereby improving the amount of pressure recovery on the rear of the rear bumper 5.

따라서 자동차의 주행 성능이 향상된다.Therefore, the driving performance of the car is improved.

이상 설명한 바와 같이 본 발명에 따르면, 스페어타이어웰(4)에 직선형의 플랜지(7)를 형성함으로써 차량 하부의 양력과 항력을 감소시킬 수 있게 되어 공력 성능 개선으로 차량의 주행 성능 및 연비를 개선할 수 있게 되는 효과가 있다.As described above, according to the present invention, by forming a straight flange (7) in the spare tire well (4) it is possible to reduce the lift and drag of the lower part of the vehicle to improve the running performance and fuel economy of the vehicle by improving the aerodynamic performance There is an effect that becomes possible.

도 1 내지 도 3은 종래 자동차의 후방 하면을 다양한 각도에서 도시한 도면,1 to 3 are views showing the rear lower surface of a conventional vehicle from various angles,

도 4는 자동차의 후방 하면에 언더커버가 설치된 상태를 도시한 도면,4 is a view showing a state in which the undercover is installed on the rear lower surface of the vehicle,

도 5 내지 도 7은 본 발명이 적용된 자동차의 후방 하면을 다양한 각도에서 도시한 도면,5 to 7 is a view showing the rear lower surface of the vehicle to which the present invention is applied from various angles,

도 8 내지 도 12는 종래기술(a)과 본 발명 기술(b)의 유동해석 결과를 비교한 것으로,8 to 12 is a comparison of the results of the flow analysis of the prior art (a) and the present technology (b),

도 8은 스페어타이어웰의 압력 분포 비교도,8 is a comparison diagram of the pressure distribution of the spare tire well,

도 9는 스페어타이어웰의 표면 유선 분포 비교도,9 is a comparison of the surface mammary gland distribution of the spare tire well,

도 10은 스페어타이어웰의 와도 분포 비교도,10 is a comparison diagram of the eddy distribution of the spare tire well,

도 11은 플랜지 주변의 유선 분포 비교도,11 is a comparison of streamline distribution around the flange,

도 12는 리어범퍼 후면의 압력 분포 비교도이다.12 is a comparison of pressure distribution on the rear of the rear bumper.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

1 : 플로어패널 2 : 배기파이프1: Floor panel 2: Exhaust pipe

3 : 머플러 4 : 스페어타이어웰3: muffler 4: spare tire well

5 : 리어범퍼 6 : 언더커버5: rear bumper 6: undercover

7 : 플랜지7: flange

Claims (2)

스페어타이어웰(4)이 차체의 후방 하면으로 노출된 자동차에 있어서,In an automobile in which the spare tire well 4 is exposed to the rear lower surface of the vehicle body, 상기 스페어타이어웰(4)의 하면에 직선형 플랜지(7)가 장착되는데, 상기 직선형 플랜지(7)는 양단이 차체의 전후방향을 향하도록 장착됨과 더불어, 상기 직선형 플랜지(7)는 차체의 좌우방향으로 일정 간격 떨어져서 장착되는 복수 개로 구성된 것을 특징으로 하는 자동차 하부의 공력 성능 개선장치.A straight flange 7 is mounted on a lower surface of the spare tire well 4, and the straight flange 7 is mounted so that both ends face the front and rear directions of the vehicle body, and the straight flange 7 is in the left and right directions of the vehicle body. Aerodynamic performance improvement apparatus of the lower part of the vehicle, characterized in that consisting of a plurality of mounted at a predetermined interval apart. 삭제delete
KR1020070131777A 2007-12-15 2007-12-15 device for improving aerodynamic performance of lower part of car KR100916448B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110831841B (en) * 2017-06-29 2022-06-07 本田技研工业株式会社 Vehicle body rear structure
KR20230088033A (en) 2021-12-10 2023-06-19 현대자동차주식회사 Side spoiler apparatus for mobility

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030023133A (en) * 2001-09-12 2003-03-19 현대자동차주식회사 The expansion structure of a fuel tank in vehicle
KR20040017668A (en) * 2002-08-23 2004-02-27 현대자동차주식회사 Vehicle for testing aerodynamic characteristics
JP2008247144A (en) * 2007-03-29 2008-10-16 Honda Motor Co Ltd Under floor structure of vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030023133A (en) * 2001-09-12 2003-03-19 현대자동차주식회사 The expansion structure of a fuel tank in vehicle
KR20040017668A (en) * 2002-08-23 2004-02-27 현대자동차주식회사 Vehicle for testing aerodynamic characteristics
JP2008247144A (en) * 2007-03-29 2008-10-16 Honda Motor Co Ltd Under floor structure of vehicle

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