JP2013052762A - Side skirt structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side skirt structure for a vehicle which can straighten a flow of air behind the vehicle to suppress the generation of air vortexes caused by the separation of the air, and also can reduce a negative pressure region in a pressure distribution on a vehicle rear surface to reduce air resistance.SOLUTION: In the side skirt structure for a vehicle, a side surface straightening auxiliary part 4b that is bent so as to be flush with a side surface straightening part 3b to form a plane continued downwardly from the side surface straightening part thereto is formed at a rear end of a side skirt 4 covering a lower side of a vehicle 1.

Description

  The present invention relates to a side skirt structure of a vehicle.

  In general, in the case of a vehicle 1 such as a large truck as shown in FIG. 7, by providing a side skirt 4 so as to cover the lower side of the loading platform 3 pulled by the cab 2 of the vehicle 1, There are products that have improved characteristics and improved fuel economy to improve economy.

  Further, an upper surface rectifying portion 3a that forms an inclined surface having a downward slope from the ceiling surface of the loading platform 3 to the rear of the vehicle 1 is formed at the upper rear end of the loading platform 3 of the vehicle 1 and the rear end of the loading platform 3 of the vehicle 1 Side rectification portions 3b that are inclined surfaces in a direction in which the width dimension narrows from both side surfaces of the cargo bed 3 toward the rear of the vehicle 1 are formed on both side portions, and the vehicle 1 runs backward along the outer surface of the cargo bed 3 when the vehicle 1 travels. The flowing air is gently guided to the rear of the cargo bed 3 by the upper surface rectifying unit 3a and the side rectifying unit 3b to reduce the range of vortices behind the vehicle 1 and reduce the air resistance due to the vortices. is there.

  For example, Patent Document 1 shows a general technical level related to the vehicle side skirt structure as described above.

JP-A-9-109826

  However, the conventional side skirt 4 is simply a flat plate, and the overhang portion behind the rear wheel 5 of the vehicle 1 ensures a departure angle by increasing the ground height toward the rear end. Therefore, the rear portion of the side skirt 4 provided behind the rear wheel 5 must be formed with a notch 4a. As a result, the air flow on the side surface of the side skirt 4 is Although it flows from the front side of the vehicle 1 to the rear side of the vehicle 1 along the side skirt 4, as shown in FIG. Could not be obtained sufficiently.

  Further, regarding the pressure distribution on the rear surface of the vehicle 1, as shown in FIG. 5A, the negative pressure region becomes large, the air resistance is not sufficiently reduced, and improvement has been desired. FIG. 5 shows that the pressure is lower as the part is black, and the pressure is higher as the part is white.

  In view of such circumstances, the present invention can suppress the generation of vortices due to separation by rectifying the flow of air behind the vehicle and reduce the pressure distribution on the rear surface of the vehicle so that the negative pressure region is reduced. An object of the present invention is to provide a vehicle side skirt structure that can be reduced.

According to the present invention, an upper surface rectifying portion that is an inclined surface having a downward slope from the ceiling surface of the loading platform toward the rear of the vehicle is formed at the upper rear end portion of the loading platform, and the loading platform is disposed on both sides of the loading platform rear end. A side skirt structure of a vehicle in which a side rectifying portion that is an inclined surface in a direction in which a width dimension is reduced from the both side surfaces of the vehicle toward the rear of the vehicle, and a side skirt is provided so as to cover a side of the lower part of the loading platform of the vehicle,
The side skirt for a vehicle is characterized in that a side rectification assisting portion is formed at the rear end portion of the side skirt that covers the lower side of the vehicle, and is bent downwardly from the side rectification portion so as to be flush with the same plane. It depends on the structure.

  According to the above means, the following operation can be obtained.

  As described above, when the side rectification auxiliary portion is formed at the rear end portion of the side skirt by bending downward from the side rectification portion so as to be flush with the same plane, the side skirt is different from the conventional flat side skirt. At the rear end of the skirt as well, the air flow from the front of the vehicle toward the rear of the vehicle along the outer surface of the side skirt is gently guided to the rear of the vehicle by the side rectification assisting unit. It becomes difficult to generate turbulence and it becomes difficult to disturb the air resistance due to the vortex.

  In the vehicle side skirt structure, a notch for securing a departure angle is formed at the rear part of the side skirt so that the ground height increases toward the rear end, and the notch part is supplemented. A movable skirt that is movable up and down between a deployed position that projects downward and a retracted position that is stored upward so that the cutout portion appears is disposed, and the side of the movable skirt at the deployed position is disposed at the side of the movable skirt. It is possible to form a side rectification assist movable portion that extends downward from the side rectification assist portion of the skirt. In this way, if the movable skirt is raised and stored in the storage position, the notch portion appears and the detent portion appears. While it is possible to secure a aperture angle, if the movable skirt is projected downward from the retracted position and lowered to the deployed position, the movable skirt Since the notch portion of the side skirt is supplemented and the side rectification assist movable portion of the movable skirt is connected downward from the side rectification assist portion of the side skirt, the vehicle skirt extends from the front of the vehicle along the outer surface of the side skirt to the rear of the vehicle. In addition to the side rectification assisting part, it is possible to gently guide the air flow toward the rear of the vehicle by the movable skirt and the side rectification assisting movable part. It is possible to suppress the air resistance caused by the vortex more reliably.

Further, in the side skirt structure of the vehicle, elevating drive means for elevating the movable skirt,
When it is detected that the vehicle is traveling at a speed lower than the set speed, a control signal for raising the movable skirt to the retracted position is output to the elevating drive means, while the vehicle is traveling at a speed higher than the set speed. And a control means for outputting a control signal for lowering the movable skirt to the deployed position to the elevating drive means.

  According to the vehicle side skirt structure of the present invention, the flow of air behind the vehicle can be rectified to suppress the generation of vortices due to separation, and the pressure distribution on the rear surface of the vehicle can be reduced in the negative pressure region. An excellent effect of reducing air resistance can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a rear side view which shows the 1st Example of the side skirt structure of the vehicle of this invention, Comprising: (a) is a side view which shows the state which stored the movable skirt upward, (b) is protruding the movable skirt below. It is a side view which shows the state made to do. It is rear part sectional drawing which shows the 1st Example of the side skirt structure of the vehicle of this invention, Comprising: (a) is the IIa-IIa arrow equivalent view of Fig.1 (a) which shows the state which stored the movable skirt upwards, (B) is the IIb-IIb arrow equivalent view of FIG.1 (b) which shows the state which protruded the movable skirt below. 1 is a rear perspective view showing a first embodiment of a vehicle side skirt structure according to the present invention. (A) is a streamline distribution diagram showing an air flow in an example of a conventional side skirt structure of a vehicle, and (b) is a streamline distribution showing an air flow in a first embodiment of the vehicle side skirt structure of the present invention. FIG. (A) is a pressure distribution diagram of the vehicle rear surface in an example of the conventional side skirt structure of the vehicle, and (b) is a pressure distribution diagram of the vehicle rear surface in the first embodiment of the vehicle side skirt structure of the present invention. It is a whole side view which shows the 2nd Example of the side skirt structure of the vehicle of this invention. It is a whole side view which shows an example of the side skirt structure of the conventional vehicle.

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

  1 to 5 show a vehicle side skirt structure according to a first embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 7 is similar to the conventional one shown in FIG. 7, but the feature of the first embodiment is that, as shown in FIG. 1, a side rectifier is provided at the rear end of the side skirt 4 covering the lower side of the vehicle 1. The side rectification assisting part 4b is formed so as to be continuously bent downward from 3b so as to be in the same plane.

  In the case of the first embodiment, a notch portion 4a for securing a departure angle is formed at the rear portion of the side skirt 4 so as to increase the ground height toward the rear end, and the notch portion 4a is A movable skirt 6 that can freely move up and down between an unfolding position (see FIG. 1 (b)) that projects downward to compensate and a storage position (see FIG. 1 (a)) that is stored upward so that the notch 4a appears. A side rectification assisting movable portion 6a that extends downward from the side rectification assisting portion 4b of the side skirt 4 at the deployed position is formed at the rear end of the movable skirt 6.

  The inclination angle θ of the side rectification assisting part 4b and the side rectification auxiliary movable part 6a is equal to the inclination angle θ of the side rectification part 3b with respect to the side surface of the loading platform 3 as shown in FIG. The inclination angle θ of the portion 3a with respect to the upper surface of the cargo bed 3 is also set to 10 to 15 °.

  As shown in FIGS. 1 and 2, the movable skirt 6 is provided between a side plate 3 c and a side skirt 4 of the loading platform 3 and a guide plate 4 c provided at a predetermined interval on the inner surface side of the side plate and the side skirt 4. The movable skirt 6 is arranged so as to be slidable in the vertical direction and is suspended by a wire 7c which is drawn out from the electric winch 7a and is wound around the sheave 7b. The movable skirt 6 is formed by the electric winch 7a, the sheave 7b and the wire 7c. Ascending / descending drive means 7 for ascending and descending is configured. Needless to say, the elevating drive means 7 is not limited to the structure shown in FIGS. 1 and 2, but may be constructed such that the movable skirt 6 is raised and lowered via a link mechanism by a motor or a fluid pressure cylinder. .

  Further, when it is detected that the vehicle 1 is traveling at a speed lower than a set speed (for example, 50 [km / h]), a control signal for raising the movable skirt 6 to the retracted position is sent to the electric drive for the lifting drive means 7. While outputting to the winch 7a, when detecting that the vehicle 1 is traveling at a set speed or higher, a control signal for lowering the movable skirt 6 to the unfolded position is output to the electric winch 7a of the elevating drive means 7. Control means 8 is provided.

  The control means 8 detects whether or not the vehicle 1 is traveling on the highway by a signal received when passing through an ETC (Electronic Toll Collection System) gate. A sensor 8a, a speed sensor 8b for detecting the traveling speed of the vehicle 1, and a control device 8c for outputting a control signal to the electric winch 7a of the elevating drive means 7 based on signals detected by the ETC sensor 8a and the speed sensor 8b. It is composed of.

  Next, the operation of the first embodiment will be described.

  As described above, when the side rectification assisting portion 4b is formed at the rear end portion of the side skirt 4 by bending downward from the side rectification portion 3b so as to be in the same plane, the simple flat plate-shaped side skirt 4 is defined as follows. On the other hand, also at the rear end of the side skirt 4, the air flow from the front of the vehicle 1 toward the rear of the vehicle 1 along the outer surface of the side skirt 4 is gently guided to the rear of the vehicle 1 by the side rectification assisting portion 4b. 1 The flow of air does not separate at the rear, making it difficult to generate vortices and less turbulence, and the air resistance due to the vortices can be reliably reduced.

  In addition, in the case of the first embodiment, based on the signals detected by the ETC sensor 8a and the speed sensor 8b, a place where the vehicle 1 is not a highway is less than a set speed (for example, 50 [km / h]). When it is detected that the vehicle is running or stopped, a control signal for raising the movable skirt 6 to the retracted position is output from the control device 8c of the control means 8 to the electric winch 7a of the elevating drive means 7, and the electric winch. Since the wire 7c is wound around the wire 7a and the movable skirt 6 is raised and held in the retracted position, the notch 4a appears as shown in FIG. It can be secured.

  On the other hand, when it is detected based on the signals detected by the ETC sensor 8a and the speed sensor 8b that the vehicle 1 is traveling on a highway at a set speed (for example, 50 [km / h]) or more, A control signal for lowering the movable skirt 6 to the unfolded position is output from the control device 8c of the control means 8 to the electric winch 7a of the elevating drive means 7, and the wire 7c is fed out from the electric winch 7a. As shown in FIG. 1 (b), the cutout 4 a of the side skirt 4 is supplemented by the movable skirt 6, and the side skirt 4 is supplemented by the movable skirt 6. The side rectification auxiliary movable portion 6a of the movable skirt 6 is connected downward from the side rectification auxiliary portion 4b of the skirt 4 and extends along the outer surface of the side skirt 4 from the front of the vehicle 1. The flow of air toward the rear of the vehicle 1 can be gently guided to the rear of the vehicle 1 by the movable skirt 6 and the side rectification assist movable portion 6a in addition to the side rectification assist portion 4b, as shown in FIG. Thus, separation of the air flow and the generation of vortices behind the vehicle 1 can be suppressed, and the air resistance due to the vortices can be more reliably reduced.

  Further, with respect to the pressure distribution on the rear surface of the vehicle 1, as shown in FIG. 5 (b), it can be seen that the negative pressure region becomes smaller and the air resistance is sufficiently reduced and improved as compared with the conventional case.

  The ETC sensor 8a is not necessarily provided, and it is not determined whether or not the vehicle 1 is traveling on the highway, and only from the control device 8c based on the signal detected by the speed sensor 8b. Needless to say, a control signal may be output to the electric winch 7a of the elevating drive means 7.

  Thus, the flow of air behind the vehicle 1 can be rectified to suppress the generation of vortices due to separation, and the pressure distribution on the rear surface of the vehicle 1 can be made smaller in the negative pressure region, thereby reducing air resistance.

  FIG. 6 shows a second embodiment of the side skirt structure for a vehicle according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to FIG. 5, but the feature of the second embodiment is that the top surface of the cargo bed 3 is smoothly curved from the front to the rear as shown in FIG. And a side skirt 4 having a side rectification assisting portion 4b formed at the rear end and a side rectification assist at the rear end of the vehicle 1 having the upper surface rectification portion 3a and the side rectification portion 3b formed at the rear end of the loading platform 3. The movable skirt 6 is provided with a movable portion 6a.

  When configured as in the second embodiment, the flow of air from the front of the vehicle 1 toward the rear of the vehicle 1 along the teardrop-shaped upper surface of the loading platform 3 is smoothly guided to the upper surface rectifying unit 3a and the vehicle 1 The flow of air from the front toward the rear of the vehicle 1 along the outer surface of the side skirt 4 is gently guided to the rear of the vehicle 1 by the movable skirt 6 and the side rectification assist movable portion 6a in addition to the side rectification assist portion 4b. 1 It is possible to suppress the separation of air flow and the generation of vortices at the rear, and to more reliably reduce the air resistance due to the vortices.

  Thus, in the second embodiment shown in FIG. 6 as well, in the same way as in the first embodiment shown in FIGS. 1 to 5, the flow of air behind the vehicle 1 is rectified to suppress the generation of vortices due to separation and the vehicle. 1 The pressure distribution on the rear surface can be reduced in the negative pressure region, and air resistance can be reduced.

  Note that the side skirt structure of the vehicle of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Loading platform 3a Upper surface rectification part 3b Side rectification part 4 Side skirt 4a Notch part 4b Side rectification auxiliary part 6 Movable skirt 6a Side rectification auxiliary movable part 7 Lift drive means 8 Control means

Claims (3)

An upper surface rectifying portion that forms an inclined surface that slopes downward from the ceiling surface of the loading platform toward the rear of the vehicle is formed at the upper rear end portion of the loading platform of the vehicle, and the both sides of the loading platform rear end are respectively formed on both sides of the loading platform. A side skirt structure of a vehicle in which a side rectifying portion that is an inclined surface in a direction in which a width dimension is reduced toward the rear of the vehicle is formed, and a side skirt is provided so as to cover a side of the lower part of the loading platform of the vehicle,
The side skirt for a vehicle is characterized in that a side rectification assisting portion is formed at the rear end portion of the side skirt that covers the lower side of the vehicle, and is bent downwardly from the side rectification portion so as to be flush with the same plane. Construction.   A notch for securing a departure angle is formed at the rear part of the side skirt so as to increase the ground height toward the rear end, and the unfolded position and the notch projecting downward to compensate for the notch. A movable skirt that is movable up and down between the retracted position stored above is disposed so that the portion appears, and the rear end portion of the movable skirt is moved downward from the side straightening assisting portion of the side skirt at the deployed position. The side skirt structure for a vehicle according to claim 1, wherein a side rectification assist movable portion is formed. Elevating drive means for elevating the movable skirt;
When it is detected that the vehicle is traveling at a speed lower than the set speed, a control signal for raising the movable skirt to the retracted position is output to the elevating drive means, while the vehicle is traveling at a speed higher than the set speed. The vehicle side skirt structure according to claim 2, further comprising: a control unit that outputs a control signal for lowering the movable skirt to the unfolded position when the movement is detected.

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