JP2006347465A - Sun roof device of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sun roof device equipped with a sun roof to open and shut a sun roof opening formed in a roof panel and a deflector suppressing generation of a wind slob owing to its configuration such that the upper part is positioned above the front edge of the sun roof opening to restrict the air stream when the opening is opened, capable of suppressing generation of a wind noise at the time of high speed running. <P>SOLUTION: The front part 9 of a sun roof housing 6 fixed to the roof panel 2 has a bottom wall 14 and a rear wall 16, and the deflector 8 positioned over the bottom wall 14 is furnished in its forefront lower part with a straightening plate 19 protruding forward, and the straightening plate 19 prevents the air stream from ahead from flowing to under the deflector 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an automobile sunroof device capable of opening and closing a sunroof opening formed in a roof panel of a vehicle body by the sunroof.

  A sunroof device of the above type is well known in the art. When an automobile equipped with such a sunroof device travels with the sunroof opening opened, there is a risk that an unpleasant pulsating sound called a wind slob may be generated in the passenger compartment. In such wind slobs, a periodic vortex is generated in the air flow separated from the roof panel surface located in front of the sunroof opening, and the vortex hits the rear edge of the sunroof opening, and the sound generated thereby is generated by the vehicle. It is thought to be generated by resonance in the room. Wind slobbing is likely to occur when an automobile is traveling at a relatively low speed of, for example, 50 to 60 km / h.

  In order to suppress the occurrence of the above-mentioned wind slob, when the sunroof opening formed in the roof panel of the vehicle body is opened, the upper part is located above the front edge part of the sunroof opening and includes a deflector that restricts the air flow. A sunroof device has been proposed (see Patent Documents 1 and 2). This deflector suppresses the occurrence of wind slob by directing the air flow separated from the roof panel surface in front of the sunroof opening upward and causing the air vortex to fly backward from the rear edge of the sunroof opening. . However, when such a deflector is provided, a loud wind noise is generated when the automobile is driven at a high speed. Providing a deflector can suppress the generation of wind slobes, but on the other hand, the generation of unpleasant wind noise becomes significant. This point will be clarified more specifically with reference to the drawings.

  FIG. 6 is a perspective view showing an upper part of an automobile provided with a conventional sunroof device. Reference numeral 2 in FIG. 6 indicates a roof panel of the vehicle body 1, and 3 indicates a front windshield glass. Further, the arrow Fr indicates the forward direction of the automobile, and the words “front” or “rear” used in the present specification mean front and rear with respect to the forward direction. The direction orthogonal to the front-rear direction is the vehicle width direction W.

  FIG. 7 is an enlarged sectional view taken along line VII-VII in FIG. 6. As shown in this figure and FIG. 6, a sunroof device 4 is provided on the upper portion of the vehicle body 1. The conventional sunroof device 4 shown here has a sunroof housing 6 extending in a substantially rectangular shape along the edge of a sunroof opening 5 formed in the roof panel 2 of the vehicle body 1, and a figure formed in the housing 6. It has a sunroof 7 that slides in the directions of arrows A and B while being guided by a non-guide rail, and a deflector 8 that is disposed in front of the sunroof opening 5. The deflector 8 extends substantially in the vehicle width direction W, and its cross-sectional shape is substantially constant. The sunroof 7 is made of, for example, transparent glass or transparent resin.

  The sunroof housing 6 is fixed to the roof panel 2, and the front portion 9 of the sunroof housing 6 is integrally connected to the bottom wall 14 and the front end of the bottom wall 14 as shown in FIG. And a rear wall 16 that is integrally connected to the rear end of the bottom wall 14 and rises upward, and a U-shaped rain gutter 11 is formed as a whole. The front wall 15 is integrally fixed to a flange portion of the roof panel 2 constituting the front edge portion 13 of the sunroof opening 5. Further, both side portions 10 of the sunroof housing 6 in the vehicle width direction W are also formed in a substantially U-groove shape like the front portion 9, thereby forming a rain gutter.

  FIG. 6 shows the state when the sunroof 7 occupies the open position. The sunroof opening 5 is closed by sliding the sunroof 7 forward as indicated by the arrow A and bringing it into the closed position. Can do. Again, the sunroof 7 can be slid back as indicated by arrow B to bring the sunroof 7 to the open position shown in FIG. Thus, the sunroof 7 serves to open and close the sunroof opening 5 formed in the roof panel 2 of the vehicle body 1. Instead of the slide-type sunroof 7, a sunroof that is detachably attached to the sunroof opening 5 can also be used.

  The deflector 8 is supported by the sunroof housing 6 or the vehicle body 1 via a link mechanism (not shown) so as to be movable between a use position indicated by a solid line and a storage position indicated by an imaginary line in FIG. Yes. When the sunroof 7 occupies the closed position, the deflector 8 is stored in the retracted position, and when the sunroof 7 moves to the open position, the deflector 8 rises to the use position. When the deflector 8 occupies the use position, the upper portion 12 of the deflector 8 is located above the front edge 13 of the sunroof opening 5. When the vehicle is run in this state, the deflector 8 regulates the air flow as will be described later, thereby suppressing the occurrence of wind slob. As described above, the deflector 8 of the sunroof device 4 has the upper portion 12 positioned above the front edge portion 13 of the sunroof opening 5 when the sunroof opening 5 formed in the roof panel 2 of the vehicle body 1 is opened. It is used to regulate this. Moreover, the deflector 8 is located above the bottom wall 14 of the sunroof housing 6 without contacting the roof panel 2. The deflector 8 is made of, for example, resin or metal.

  As shown in FIGS. 6 and 7, when the vehicle is run with the deflector 8 occupying the use position and the sunroof opening 5 is opened, the air flow separated from the roof panel upper surface 17 in front of the sunroof opening 5 is as shown in FIG. As shown by the arrow C in FIG. Therefore, the vortex generated periodically in the air flow separated from the upper surface 17 of the roof panel is blown behind the rear edge 18 of the sunroof opening 5 shown in FIG. Slobbing can be suppressed. If the deflector 8 shown in FIGS. 6 and 7 is not provided, the vortex periodically generated in the air flow separated from the upper surface 17 of the roof panel when the automobile is traveling at a low speed is the sunroof shown in FIG. A violent wind slob is generated by hitting the rear edge 18 of the opening 5 or the sunroof 7 whose open position is closed. By providing the deflector 8 shown in FIGS. 6 and 7, it is possible to prevent the occurrence of such intense wind slob.

  However, when the vehicle speed of the automobile is as high as about 100 km / h, for example, a large wind noise is generated instead of the wind slob. One of the causes is considered to be as follows. That is, when a vortex is formed in the air flow passing through the deflector 8, the pressure of the air in the vicinity of the deflector 8 is increased and the air is greatly compressed. However, if this vortex passes through the deflector 8, the pressure of the air in the vicinity of the deflector 8 suddenly decreases, and the air expands. Thus, every time a vortex is formed, the pressure of the air in the vicinity of the deflector 8 fluctuates greatly, thereby generating wind noise.

  However, according to a study by the present inventors, it has been clarified that wind noise is generated due to the following causes in addition to the above-described causes.

  First, as is generally known, in order to effectively suppress the occurrence of wind slob, it is preferable to increase the height of the deflector. However, when the height of the deflector increases, wind noise generated when the automobile travels at a high speed increases.

  As shown in FIG. 7, when the height from the sunroof upper surface 17 located in front of the sunroof opening 5 to the upper part 12 of the deflector 8 is H, the deflector height H is generated when the vehicle is driven. The relationship with the sound pressure level (dB) of noise is as shown in FIG. 8, for example. The solid line in FIG. 8 indicates the sound pressure level of the wind slob when the vehicle traveling speed is 50 km / h, and the broken line indicates the sound pressure level of the wind noise when the vehicle traveling speed is 100 km / h. ing. As can be seen from FIG. 8, when the deflector height H is high, the occurrence of the wind slob is low. In the example shown in FIG. 8, when the deflector height H is 22 mm, the occurrence of the wind slob is minimum. Yes. However, as the deflector height H increases, the generation of wind noise becomes remarkable. In the example shown in FIG. 8, when the deflector height H becomes 22 mm or more, the wind noise increases rapidly.

  The present inventor conducted the following experiment in order to clarify the cause of the sudden increase in wind noise as described above.

  A sunroof device 4 in which the height h of the rear wall 16 of the front portion 9 of the sunroof housing 6 shown in FIG. 7 is 30 mm was prepared and mounted on the upper portion of the vehicle body 1. The wind noise generated when the sunroof opening 5 of the sunroof device 4 is opened, the deflector 8 is raised to the use position, and the height H of the deflector is changed at various times to drive the vehicle at 100 km / h. Was measured. On the other hand, the sunroof device 4 having the sunroof housing 6 having no rear wall 16 and having a height h of zero is prepared, mounted on the vehicle body 1, and wind noise was measured in exactly the same manner as described above. . FIG. 9 is a graph showing the relationship between the noise level change (dB) obtained from the measurement result and the deflector height H. FIG.

  The solid line in FIG. 9 shows the change in the noise level when the height h of the rear wall 16 is 30 mm, and the broken line shows the change in the noise level when the height h of the rear wall 16 is zero, that is, when there is no rear wall 16. Show. As can be seen from FIG. 9, regardless of the presence or absence of the rear wall 16, the change in the noise level increases as the deflector height H increases. At that time, if the rear wall 16 is present, the noise level is rapidly increased as the deflector height H is increased. However, if the rear wall 16 is not present, even if the deflector height H is increased, The noise level does not increase rapidly. This is considered to indicate the following.

  As shown in FIG. 7, the deflector 8 is not in contact with the roof panel 2, and a gap G exists between them. For this reason, when the deflector height H is increased, the flow rate of air flowing under the deflector 8 through the gap G as shown by an arrow D in FIG. If the rear wall 16 is present at this time, the air flow D collides with the rear wall 16, thereby generating noise, that is, wind noise. It has also been confirmed that noise generation becomes particularly noticeable when the height H of the deflector increases and the entire deflector 8 is positioned above the upper surface 17 of the roof panel. On the contrary, when the rear wall 16 is not present, the deflector height H is increased, and even if the amount of the air flow D flowing below the deflector 8 is increased accordingly, the air flow D is changed to the rear wall 16. The noise does not increase suddenly. Therefore, if the sunroof housing 6 without the rear wall 16 is used, it is possible to suppress the generation of wind noise generated when the automobile is traveling at high speed. However, if the sunroof device 4 is configured in this way, the rain gutter 11 is eliminated, and thus there is an unavoidable risk of rainwater entering the vehicle interior. Therefore, the sunroof housing 6 without the rear wall 16 cannot be used, and the sunroof housing 6 with the rear wall 16 needs to be used.

Japanese Patent Laid-Open No. 2000-233643 JP-A 63-90433

  The present invention has been made on the basis of the above-described novel recognition, and the object of the present invention is to effectively generate wind noise generated during high-speed driving of an automobile even when a sunroof housing having a rear wall is used. An object of the present invention is to provide a sunroof device that can be suppressed.

  To achieve the above object, the present invention provides a sunroof that opens and closes a sunroof opening formed in a roof panel of a vehicle body, a sunroof housing that extends along an edge of the sunroof opening and is fixed to the roof panel, When the sunroof opening is opened, an upper portion is provided above the front edge of the sunroof opening and includes a deflector for restricting the air flow, and the front part of the sunroof housing has a bottom wall and the bottom wall. A rear wall that is integrally connected to the rear end of the vehicle and rises upward, and the deflector is located above the bottom wall without contacting the roof panel. The said deflector has the baffle plate which protrudes toward the front in the front-end lower part, and proposes the sunroof apparatus of the motor vehicle characterized by the above-mentioned (Claim 1). .

  The sunroof device for an automobile according to claim 1, wherein when the sunroof opening is opened, the lower surface of the rectifying plate is the same height as the upper surface of the roof panel positioned in front of the sunroof opening, or from the upper surface of the roof panel. It is also advantageous if it is located slightly below (claim 2).

  ADVANTAGE OF THE INVENTION According to this invention, although the sunroof housing has a rear wall, the sunroof apparatus of a motor vehicle which can suppress effectively the wind noise generated at the time of high speed driving | running | working of a motor vehicle can be provided.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a perspective view showing an upper portion of an automobile, and FIG. 2 is an enlarged sectional view taken along line II-II in FIG. The automobile shown here is also provided with a sunroof device 4 at the top of the vehicle body 1. The basic configuration of the sunroof device 4 shown in these drawings is the same as that of the sunroof device 4 shown in FIGS. 6 and 7. That is, the sunroof device 4 shown in FIGS. 1 and 2 also extends along the sunroof 7 that opens and closes the sunroof opening 5 formed in the roof panel 2 of the vehicle body 1, the edge of the sunroof opening 5, and the roof panel 2. A sunroof housing 6 fixed to the sunroof, and when the sunroof opening 5 is opened, the upper part 12 is located above the front edge 13 of the sunroof opening 5 and restricts the air flow. The front portion 9 includes a bottom wall 14 and a rear wall 16 that is integrally connected to the rear end portion of the bottom wall 14 and rises upward. The deflector 8 is not in contact with the roof panel 2. It is located above the bottom wall 14. Other basic configurations are the same as those shown in FIGS. Therefore, in FIG. 1 and FIG. 2, the same parts as those of the conventional sunroof device are denoted by the same reference numerals as those in FIG. 5 and FIG. To do.

  The difference from the prior art is that the deflector 8 has a rectifying plate 19 projecting forward at the lower part of the front end. The current plate 19 extends over the entire length of the deflector 8 in the vehicle width direction, and is integrally attached to a deflector portion other than the current plate. The current plate 19 also does not contact the roof panel 2. Therefore, the deflector 8 can be moved up and down without any trouble without interfering with the roof panel 2 between the use position indicated by the solid line and the storage position indicated by the virtual line in FIG.

  When the sunroof opening 5 is opened and the deflector 8 is raised to the use position shown by the solid line in FIG. 2, the rectifying plate 19 has a gap G between the conventional deflector 8 and the roof panel 2 shown in FIG. Located in the site. Therefore, when the automobile is driven at a high speed in this state, the air flow separated from the roof panel upper surface 17 located in front of the sunroof opening 5 is guided by the rectifying plate 19 and flows along the upper surface of the deflector 8. Unlike the prior art, a large amount of air does not flow under the deflector 8. Therefore, although the sunroof housing 6 is provided with the rear wall 16, a large amount of airflow does not collide with the rear wall 16, and the generation of wind noise during high speed running is effectively suppressed. can do. Thus, the extremely simple configuration of providing the rectifying plate 19 in the deflector 8 can suppress the generation of wind noise when the automobile is traveling at high speed.

  FIG. 4 shows the measurement of the change in the noise level generated when the sunroof opening 5 is opened, the deflector 8 is raised to the use position and the vehicle is driven at 100 km / h, with the deflector height H varied. It is a graph which shows an experimental result. The solid line in FIG. 4 shows the change in noise level when the protruding length L (see FIG. 2) of the rectifying plate 19 is 6 mm, and the broken line shows the change in noise level when the protruding length L is 4 mm. Yes. The alternate long and short dash line indicates a change in the noise level when the protruding length L is 2 mm, and the alternate long and two short dashes line indicates a change in the noise level when the sunroof housing 6 having no rectifying plate 19 is used. As can be seen from FIG. 4, the use of the deflector 8 having the rectifying plate 19 can effectively suppress the generation of wind noise when the automobile is traveling at high speed. In the experimental results shown in FIG. 4, when the deflector height H is 20 mm, when the deflector 8 having the rectifying plate 19 is used, the noise is about 1.2 dB more than when the deflector without the rectifying plate is used. Was able to be lowered.

  However, when the height H of the deflector is particularly high, and the height H is about 27 mm or more in the example of FIG. 4, the rectification without the rectifying plate is performed when the sunroof housing 6 having the rectifying plate 19 is used. The noise level may be higher than when a plate housing is used. As shown in FIG. 3, when the deflector height H is increased and the lower surface 20 of the rectifying plate 19 is positioned above the roof panel upper surface 17 positioned in front of the sunroof opening 5, the roof panel This is because a large gap g is formed between the upper surface 17 and the lower surface 20 of the rectifying plate 19, and a large amount of air flows below the deflector 8 through this and the air collides with the rear wall 16. Conceivable.

  Therefore, as shown in FIG. 2, when the sunroof opening 5 is opened, the lower surface 20 of the rectifying plate 19 of the deflector 8 in the use position is the same height as the roof panel upper surface 17 located in front of the sunroof opening 5, or It is preferable to set the height of the use position of the deflector 8 so that it is positioned slightly below the upper surface 17 of the roof panel. If comprised in this way, when the deflector 8 exists in a use position, the big clearance gap g (FIG. 3) will not be made between the roof panel upper surface 17 and the lower surface 20 of the baffle plate 19. FIG. For this reason, generation | occurrence | production of the wind noise at the time of high speed driving | running | working of a motor vehicle can be suppressed much more effectively.

  FIG. 5 shows an example in which the cross-sectional shape of the deflector 8 having the current plate 19 is different from that of the deflector 8 shown in FIG. As described above, various types of deflectors 8 can be employed.

It is a perspective view which shows the upper part of a motor vehicle. It is the II-II line expanded sectional view of FIG. FIG. 3 is a cross-sectional view similar to FIG. 2, illustrating a problem when the lower surface of the deflector illustrated in FIG. 2 is positioned above the inner panel upper surface. It is a graph which shows the relationship between deflector height and a noise level change. It is sectional drawing similar to FIG. 2 which shows the deflector of a form different from the form shown in FIG. It is a perspective view which shows the upper part of the motor vehicle which has the conventional sunroof apparatus. It is the VII-VII line expanded sectional view of FIG. It is a graph which shows an example of the relationship between deflector height and the sound pressure level of a wind slob and a wind noise. It is a graph which shows an example of the relationship between a deflector height and the change of a noise level.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Roof panel 4 Sunroof apparatus 5 Sunroof opening 6 Sunroof housing 7 Sunroof 8 Deflector 9 Front part 12 Upper part 13 Front edge part 14 Bottom wall 16 Rear wall 17 Roof panel upper surface 19 Current plate 20 Lower surface

Claims (2)

A sunroof that opens and closes a sunroof opening formed in a roof panel of a vehicle body, a sunroof housing that extends along an edge of the sunroof opening and is fixed to the roof panel, and an upper portion when the sunroof opening is opened, A deflector that is positioned above the front edge of the sunroof opening and restricts the air flow, and the front part of the sunroof housing is integrally connected to the bottom wall and the rear end of the bottom wall. In the sunroof device of the automobile, the deflector is located above the bottom wall without contacting the roof panel.
The sunroof device for an automobile, wherein the deflector has a rectifying plate protruding forward at a lower part of a front end thereof. The lower surface of the current plate is located at the same height as the upper surface of the roof panel located in front of the sun roof opening or slightly below the upper surface of the roof panel when the sun roof opening is opened. Automobile sunroof device.

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