JP4151750B2 - Car sunroof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sunroof for an automobile in which a sunroof opening is provided in a roof of the automobile and the opening is opened and closed by a sunroof panel or sunroof glass.
[0002]
[Prior art]
The sunroof panel or sunroof glass of the sunroof is removed from the opening of the roof so that the opening is open, and when the car runs at high speed, the airflow hits the rear edge of the opening, so it is called windslob An unpleasant sound is generated. In order to avoid this, a deflector is used.
[0003]
As this deflector, there is one having a guide surface formed so as to protrude upward from the opening when the sunroof panel or the sunroof glass is removed from the opening (Japanese Patent Laid-Open No. 7-285343). In this deflector, by increasing the angle of inclination formed by the guide surface and the roof or by increasing the amount of protrusion of the guide surface from the roof, the air flow flowing from the front along the roof is behind the opening. This prevents it from hitting the edge of the.
[0004]
[Problems to be solved by the invention]
When the air flow is blown upward by the deflector, the flow direction is changed. It is known that the wake after separation by the deflector, that is, the vortex flow increases as the curvature that changes the flow direction increases. On the other hand, the wind noise generated by the deflector increases in proportion to the sixth power of the flow velocity. Therefore, wind slobs decrease as the amount of protrusion of the deflector increases, so that the air flow does not hit the rear edge of the opening, whereas the wind noise increases as the amount of protrusion of the deflector increases. Will be. Thus, wind slob and wind noise are contradictory matters.
[0005]
By the way, conventionally, the direction of the air flow flowing from the front is changed upward by the deflector to prevent the air flow from hitting the rear edge of the opening, but the arrangement and shape of the deflector are variously changed. As a result of repeating the experiment, it was found that the same effect can be obtained even if the air flow existing behind the deflector is prevented from dropping downward.
[0006]
The present invention provides an automobile sunroof that can suppress the occurrence of wind slob and reduce wind noise based on the above-identified facts.
[0007]
[Means for Solving the Problems]
The present invention provides a sunroof for an automobile in which a sunroof opening is provided in a roof of the automobile, and the opening is opened and closed by a sunroof panel or sunroof glass, and includes a deflector and a current plate. When the opening is opened, the deflector protrudes upward from the front edge of the opening at a distance from the front edge of the opening, and the air flow from the front is directed upward to the air flow. The air is diverted to the downward air flow after passing through. The rectifying plate rectifies the downward air flow and flows it toward the opening.
[0008]
In a preferred embodiment, the sunroof includes a sunroof housing having a water channel extending in the width direction of the automobile for receiving rainwater dripping from a front edge of the opening and disposed below the opening. The rectifying plate is formed on the sunroof housing so as to continue to the rear of the water channel.
[0009]
[Action and effect]
When the sunroof panel or sunroof glass is removed from the opening, that is, moved or removed, and the opening is opened, the air flow from the front along the roof hits the deflector when the automobile moves forward, and the air flow upwards and below Is diverted to the air flow to.
[0010]
The air flow diverted by the deflector and flowing downward is rectified by the rectifying plate and reaches the opening. Since the air flow that has reached the opening can maintain the pressure relationship that supports the air flow that flows backward through the upper part of the deflector from below, the air flow that flows backward through the upper part of the deflector is less likely to bend downward. Can prevent reaching the edge. As a result, the occurrence of wind slop can be suppressed.
[0011]
The air flow flowing from the upper side to the rear side of the deflector generally inevitably bends toward the opening because the total pressure of the air flow is higher than the total pressure of the opening. However, in the present invention, the air flow flowing from the upper side to the rear side of the deflector is supported by the air flow reaching the opening from the lower side of the deflector, thereby suppressing the bending of the former air flow. Therefore, the amount of protrusion of the deflector can be made smaller than the amount of protrusion of the deflector when the air flow that is diverted by the deflector and flows from the upper side to the rear side of the deflector is not supported from the lower side. Thereby, the wind noise caused by the deflector can be kept low.
[0012]
According to the preferred embodiment, since the sunroof includes the sunroof housing and the baffle plate is formed in the sunroof housing, it is possible to cope with the sunroof housing by making a slight change without providing a baffle plate separately.
[0013]
The sunroof housing has a water channel that accepts rainwater dripping from the front edge of the opening. The water channel only needs to be located substantially below the distance between the front edge of the opening and the deflector. Since the rectifying plate that rectifies the air flow that flows below the deflector after the interval only needs to be positioned behind the interval, even if the water channel and the rectifying plate are provided in the sunroof housing, the air flow is transferred to the water in the water channel. There is no impact and the drainage function is not impaired.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1 showing a cross section and FIG. 2 showing a plan view, a sunroof of an automobile is provided with a sunroof opening 12 in a roof 10, and the opening 12 is opened and closed by a sunroof panel or sunroof glass 14. 16 and a current plate 18.
[0015]
When the opening 12 is opened, the deflector 16 protrudes from the front edge 13 of the opening 12 rearwardly with a distance 20 to the upper side of the front edge 13 as shown in FIG. The air stream 22 is split into an upward air stream 24 and a downward air stream 26 after a distance 20.
[0016]
In order to divert the air flow 22 from the front, the deflector 16 is preferably formed so that its front side surface 27 is positioned substantially vertically when protruding from the opening 12. Further, it is preferable that the entire upper surface 28 is curved in a convex shape with the upper surface 28 facing upward, and the lower surface 29 is curved in a convex shape with the lower surface 29 facing downward, or flat. The deflector 16 can be formed hollow as shown in FIG. The deflector 16 can be made by injection molding or extrusion molding of a hard resin, or by extrusion molding of aluminum, or by welding a bent iron plate. However, the deflector 16 needs to have the same cross-sectional shape over the entire width in the vehicle body width direction. Absent. That is, it is not necessary that the front side surface 27, the upper side surface 28, and the lower side surface 29 are continuous over the entire width in the vehicle body width direction, and the upper side surface or the lower side surface of another shape is divided into the divided portions. It can also be set as an arranged form.
[0017]
As shown in FIG. 2, the deflector 16 includes a warpage portion 32 and two arm portions 33 (only one arm portion 33 is shown in FIG. 2) disposed on both sides of the warpage portion 32. It can be formed so that the planar shape is substantially U-shaped and the cross section of the bent portion 32 gradually increases from the connecting portion with the arm portion 33 toward the center. In this case, the upper side surface 28 and the lower side surface are provided in the curving portion 32. The warped portion 32 and the two arm portions 33 can be formed by being integrally formed, or can be integrally formed by combining separately formed portions.
[0018]
In the deflector 16, for example, the arm portion 33 is swingably attached to the mounting plate 36 on the vehicle body side by a bolt 34, the arm portion 33 behind the bolt 34 is pulled by a tension spring (not shown), and the bent portion 32 is shown in FIG. It attaches near the edge part 13 ahead of the opening 12 so that it may be biased to the protrusion position shown with the continuous line.
[0019]
In the illustrated biased position, the deflector 16 protrudes upward from the front edge 13 by a predetermined protrusion amount h, and is positioned at a distance D from the front edge 13. Suitable values for the protrusion amount h, the distance D, the height and the front-rear length of the bent portion 32 in the maximum cross section, that is, the particularly effective dimension (mm) confirmed in the actual vehicle is as shown in FIG. Met.
[0020]
The rectifying plate 18 rectifies the downward air flow 26 that passes through the interval 20 and flows it toward the opening 12. In order to fulfill this function, at least the rectifying surface 19 of the rectifying plate 18 is convex downward as shown in the drawing, and is a curved surface that is smoothly curved as a whole or a flat surface. The curved surface or the flat surface is gradually lifted upward toward the rear. The rectifying plate 18 can be provided solely for rectification, but is preferably as described below.
[0021]
As shown in FIG. 1, the sunroof includes a sunroof housing 42 that has a water channel 40 that extends in the width direction of the automobile and receives rainwater dripping from the front edge 13 of the opening 12, and is disposed below the opening 12. . Therefore, the rectifying plate 18 is formed on the sunroof housing 42 so that the rectifying plate 18 continues to the rear of the water channel 40.
[0022]
As is known per se, the sunroof housing 42 supports a sunroof panel or sunroof glass so that it can be opened and closed. To make the sunroof 38 transparent, so-called moon roof, sunroof glass is used. The sunroof panel or sunroof glass 14 is a slide type or a detachable type that slides in the front-rear direction. When the sunroof panel or sunroof glass 14 is placed in a predetermined position as shown by the phantom line in FIG. 1 and the opening 12 is closed, the deflector 16 is pushed down to the vicinity of the sunroof housing 42, but when the opening 12 is opened, the deflector 16 is opened to the opening 12. Projects upward from the position of a solid line.
[0023]
Eventually, the sunroof housing only needs to support the sunroof panel or the sunroof glass and fulfill the function of housing the deflector. Conventionally, the sunroof housing 50 has a configuration in which a water passage 52 having a large cross-sectional shape is provided and a deflector 54 is accommodated in the water passage 52 as shown in FIG. Comparing the sunroof housing 50 with the sunroof housing 42 shown in FIG. 1, in the sunroof housing 42, the front-rear length L of the water channel 40 is shorter than the front-rear length of the water channel 52, and the height H of the rear wall 41 of the water channel 40 is The height of the wall 53 behind the water channel 52 is lower, and the rectifying plate 18 behind the water channel 40 also serves as a storage place for the deflector 16.
[0024]
The distance between the deflecting part 32 of the deflector and the edge 13 in front of the opening and the deflecting part 32 is set to the dimensions shown in FIG. 4, and the angle formed by the water channel depth H, the rectifying surface 19 and the horizontal plane at the site of the wall 41. As a result of experiment with various changes in θ and the length L of the water channel, the correlation shown in FIG. 5, FIG. 6, and FIG. 7 was obtained. 5 to 7, when the wind slob level is 100dB, the water channel depth is 3.9mm, the rectifying surface angle is 13.7 °, and the longitudinal length is 13.4mm, which is smaller than this. As a result, the wind slob level has dropped. Based on the allowable wind slob level, the dimensions of each part of the sunroof housing 42 can be determined with reference to FIGS.
[0025]
On the other hand, it is necessary to examine the channel depth from another viewpoint. For example, when the automobile is in a state where it rises forward and tilts by 11 °, the water depth is set so that water is poured into the water channel 40 and the water remaining in the water channel due to surface tension does not overflow from the water channel when suddenly accelerated. Determine. In the examination from this point, it was confirmed that the water would not overflow if the channel depth was 5 mm or more.
[0026]
The length of the rectifying plate 18 in the front-rear direction of the sunroof housing 42 is such that the space above the rectifying plate 18 accommodates the deflector 16, so that the deflector 16 is accommodated with a slight clearance from the rectifying surface 19. It is determined to be longer than the longitudinal length of the deflector 16 so that the deflector in the state does not interfere with the sunloud panel or the sunroof glass 14 whose opening is closed. Further, as shown in FIG. 4, the position of the rainwater drip line 46 and the water channel 40 is determined so that the drip line 46 comes to the position of approximately two-thirds of the longitudinal length from the front of the water channel 40. In this case, it is possible to prevent the splash of rainwater that has been dropped from reaching the rectifying plate 18.
[0027]
When the vehicle travels with the deflector 16 projecting upward from the opening 12, as shown in FIG. 3 schematically, the air flow 22 flowing along the roof 10 hits the deflector 16, while the upward air flow. 24, on the other hand, a downward air flow 26 through the interval 20.
[0028]
The air flow 24 directed from the upper side to the rear side of the deflector 16 flows along the upper side surface 28 of the deflector 16 to a certain extent and moves away from the upper side surface 28. The deflector 16 may cause the air flow 24 to fly upward to such an extent that the air flow 24 does not hit the rear edge 48 of the opening 12. On the other hand, the air flow 26 flowing below the deflector 16 is rectified by the rectifying surface 19 of the rectifying plate 18 and flows toward the opening 12. The air flow 26 that has reached the opening 12 maintains a pressure relationship that supports the air flow 24 from below, so that the air flow 24 is prevented from bending downward.
[0029]
In the conventional sunroof housing 50 shown in FIG. 8, even if the air flow 56 from the front is divided into two air flows 58 and 60 by the deflector 54, the sunroof housing 50 does not have any rectifying function. The air flow 60 that has flowed into the flow path is not rectified. As a result, the flow is disturbed at the confluence with the air flow 58, and the effect of suppressing the bending of the air flow 58 cannot be obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of an automobile sunroof according to the present invention, in which a deflector protrudes from a roof.
FIG. 2 is a half plan view showing an embodiment of a deflector used in a sunroof of an automobile according to the present invention.
FIG. 3 is a cross-sectional view schematically showing the operation of the deflector.
FIG. 4 is a cross-sectional view showing the dimensions for obtaining a preferable result of the deflector and the distance between the deflector and the front edge of the opening, and the dimension between the housed deflector and the current plate.
FIG. 5 is a graph showing the correlation between water channel depth and wind slob level.
FIG. 6 is a graph showing a correlation between a rectifying surface angle and a wind slob level.
FIG. 7 is a graph showing the correlation between the length of a water channel and the wind slob level.
FIG. 8 is a cross-sectional view showing a conventional sunroof housing, schematically showing air flow.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Roof 12 Opening 13 Front edge 14 Sunroof panel or sunroof glass 16,54 Deflector 18 Rectification plate 19 Rectification surface 20 Space | interval 22,24,26,56,58,60 Air flow 40,52 Waterway 42,50 Sunroof housing

Claims (2)

An automobile sunroof is provided with a sunroof opening in a roof of an automobile, and the opening is opened and closed by a sunroof panel or sunroof glass,
When the opening is opened, it protrudes upward from the front edge of the opening with a gap from the front edge of the opening, and the air flow from the front is directed upward and downward through the gap. A deflector that divides the air flow,
An automobile sunroof comprising: a rectifying plate that rectifies the air flow downward and flows the air flow toward the opening. The sunroof has a water channel extending in the width direction of the automobile that receives rainwater dripping from the front edge of the opening, and includes a sunroof housing disposed below the opening, and the rectifying plate is located behind the water channel The sunroof for an automobile according to claim 1, wherein the sunroof housing is formed to be continuous with the sunroof housing.

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