JP2018020582A - Airflow control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airflow control device for a vehicle which can suppress a rise of a lift force acting on the vehicle while improving fuel economy.SOLUTION: In an airflow control device 1 for a vehicle having opening part opening/closing means 30 which is arranged at a wheel 20 for the vehicle, and can control movement to an opening position for opening a wheel opening part 24 by a control part 15, and a closing position for closing the wheel opening part, when the opening part opening/closing means is in the closing position, the opening part opening/closing means closes at least a part of the wheel opening part existing in either of a first region 61 located at a lower side from a prescribed height position of the wheel, and a second region 62 located at an upper part rather than the first region, and opens at least a part of the wheel opening part in the other region.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle airflow control device, and more particularly to a vehicle airflow control device provided with an opening / closing means provided on a vehicle wheel and capable of opening / closing a wheel opening.

  The airflow that flows through the vehicle during traveling includes an airflow that enters the engine room from the bumper side in front of the vehicle, passes through the wheel opening, and flows on the side surface of the vehicle. When running, this airflow provides brake cooling action, while at high speed running, this airflow interferes with the airflow that flows on the side of the vehicle outside the wheel, resulting in air resistance, leading to a reduction in fuel consumption. It is also known.

  In order to eliminate such fuel consumption degradation due to air resistance, Patent Document 1 discloses an open position provided on a vehicle wheel, which opens all wheel openings, and a closed position where all wheel openings are closed. And an air flow control device for a vehicle having an opening / closing means that is movable. In this apparatus, the air flow flowing out from the wheel opening to the outside of the vehicle is suppressed by moving the opening opening / closing means to the closed position and closing all the wheel openings during high-speed traveling.

JP 2006-327548 A

  In the vehicle airflow control device of Patent Document 1, the air resistance is reduced by blocking the airflow that passes through the wheel opening and suppressing the interference with the airflow that flows on the side surface of the vehicle when traveling at high speed. Low fuel consumption can be achieved.

  However, when all of the wheel openings are closed, the air pressure in the wheel house increases, which raises the problem that the lift acting on the vehicle body increases and the vehicle posture becomes unstable.

  The present invention has been made in view of the above problems, and an object of the present invention is to improve the fuel efficiency by suppressing the interference of the air flow, and to suppress the increase in lift acting on the vehicle. An object is to provide a control device.

  In order to achieve the above object, an airflow control device for a vehicle according to claim 1 is provided in a vehicle wheel, and an open position where the wheel opening is opened by the control unit, and the wheel opening is closed. In the vehicle airflow control device provided with the opening / closing means that can be controlled to move to and from the closed position, the opening / closing means is, when in the closed position, a lower side of the wheel from a predetermined height position. Of the one region and the second region located above the first region, at least a part of the wheel opening in one region is closed, and at least a part of the wheel opening in the other region is closed It is characterized by opening.

  According to this configuration, when the opening portion opening / closing means is in the closed position, the wheel opening portion flows out from the wheel opening portion by closing at least a part of the wheel opening portion in one of the first region and the second region. The air flow to be reduced can be reduced, and interference with the air flow passing through the side of the vehicle can be suppressed. Thereby, the improvement of the fuel consumption by suppressing generation | occurrence | production of air resistance is achieved. Further, the opening / closing means simultaneously opens at least a part of the wheel opening in the other region, so that the air in the wheel house can be discharged from the wheel opening in the open state. Thereby, the raise of the air pressure in a wheel house can be suppressed and the raise of the lift which acts on a vehicle can be suppressed.

  According to a second aspect of the present invention, in the vehicle airflow control device according to the first aspect, the predetermined height position is a lower end position of the vehicle body in front of the wheel, and the opening opening / closing means Is characterized by closing at least a part of the wheel opening in the first region in the closed position.

  According to this configuration, air easily flows out from the wheel opening located at a position lower than the lower end of the vehicle body. ), The effect of suppressing air resistance due to the airflow flowing out from the wheel opening can be enhanced.

  According to a third aspect of the present invention, in the vehicular airflow control device according to the first or second aspect, the projection projects downward from the lower surface of the vehicle body in front of the wheel house that houses the wheel, and the projecting dimension is reduced. A changeable flap is provided, and the control unit moves the opening opening / closing means to an open position or a closed position in accordance with a protruding dimension of the flap.

  According to this configuration, the flap disposed in front of the wheel house can improve the aerodynamic performance by rectifying the air flow generated on the lower side of the vehicle body, and the opening portion according to the projecting dimension of the flap. By controlling the opening / closing movement of the opening / closing means, the air flow rectification effect, that is, the effect of reducing the air resistance can be enhanced.

  According to a fourth aspect of the present invention, in the vehicle airflow control device according to the third aspect of the present invention, the wheel includes the flap between the first region and the second region and in the vertical direction. An intermediate opening opening / closing means capable of opening / closing the wheel opening in the third region is provided, and the control unit opens the intermediate opening opening / closing means according to a projecting dimension of the flap. It is moved to a closed position.

  According to this configuration, the aerodynamic performance can be improved by appropriately controlling the air flow generated in the third region by the flap and the intermediate opening opening / closing means.

  According to a fifth aspect of the present invention, in the vehicle airflow control device according to any one of the first to fourth aspects, the control unit opens the opening portion opening / closing means according to the speed of the vehicle. It is moved to a position or a closed position.

  According to this configuration, since the traveling wind acting on the vehicle body changes depending on the speed of the vehicle, good aerodynamic performance can be obtained during low-speed driving or high-speed driving by controlling the movement of the opening / closing means according to the speed. Can do.

  According to the vehicle airflow control device of the present invention, an increase in lift acting on the vehicle can be suppressed while improving fuel efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS Outline explanatory drawing of the airflow control apparatus for vehicles which is 1st Embodiment of this invention. The typical side view of the front part of a vehicle. It is the III-III sectional view taken on the line of FIG. 2, Comprising: The figure which shows the state which has a shutter in an open position. The principal part enlarged view of FIG. The flowchart figure which shows the process which a control unit performs. The figure similar to FIG. 3 which shows the modification 1 of a shutter. The figure similar to FIG. 3 which shows the modification 2 of a shutter. The side view similar to FIG. 2 which shows the airflow control apparatus for vehicles of 2nd Embodiment. FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8 and shows a state where the first shutter and the second shutter are in a closed position. The flowchart figure which shows the process which a control unit performs.

(First embodiment)
FIG. 1 is a schematic explanatory diagram of a vehicle airflow control device 1 according to a first embodiment of the present invention. The vehicle airflow control device 1 adjusts the airflow passing through the inside of the wheel house 3 and can open and close the vehicle wheel 20 disposed inside the wheelhouse 3 and the wheel opening 24. And a shutter (opening opening / closing means) 30. As shown in FIG. 2, a flap 40 protruding from the lower surface of the vehicle body is provided in front of the wheel house 3. The vehicle airflow control device 1 also includes a vehicle speed sensor 11 that detects the speed of the vehicle 2, a changeover switch 12, an open / close switch 13, a flap detection sensor 14, a control unit (control unit) 15, and a shutter 30. And a drive unit 33 that moves the motor.

  As shown in FIG. 2, the wheel 20 includes a wheel center portion 21, a rim portion 22 to which a tire 29 is mounted, and a plurality of spokes 23 that connect the wheel center portion 21 and the rim portion 22. As shown in FIGS. 1 and 3, the wheel center portion 21 is connected and fixed to a hub 52 connected to an end portion of the drive shaft 51. The plurality of spokes 23 extend radially from the wheel center portion 21, and the tip portions are connected to the inner peripheral surface of the rim portion 22.

  The power of the engine EG is transmitted to the drive shaft 51 via the transmission TM. In addition, a suspension device that supports wheels is connected to the hub 52 attached to the end of the drive shaft 51. The suspension device includes a housing 56 that rotatably supports the hub 52, a lower arm 57 and a strut (not shown) connected to the housing 56, and the like. The housing 56 is connected to a brake caliper that sandwiches the brake disk 53 and generates a braking force and a tie rod (not shown) of a steering system.

  As shown in FIG. 2, a flap 40 that protrudes downward from the lower surface of the vehicle body is disposed in front of the wheel house 3. The flap 40 constitutes a rectifying structure for preventing the air flow passing through the lower part of the vehicle body from being disturbed by the rotation of the front wheels from the traveling wind generated during traveling of the vehicle and increasing the air resistance. The flap 40 is a substantially rectangular plate-like member that extends in the width direction of the vehicle 2 so as to be wider than the tire 29, and has a downward projecting dimension L by a drive unit such as an electric motor (not shown). It is configured to be changeable. The flap 40 can be configured such that the protruding dimension L is changed according to the speed of the vehicle 2 by, for example, a flap control unit (not shown). As an example, the protruding dimension L can be increased when the speed of the vehicle 2 is equal to or higher than a predetermined threshold, and the protruding dimension L can be decreased when the speed is less than the predetermined threshold.

For the sake of convenience, in the installed state, the wheel 20 is located in a first region 61 located below a predetermined height and below the first region 61 and adjacent to the first region 61 (that is, above the first region 61). And the second region 62 (which is located in FIG. 1). In FIG. 2, the first region 61 is a region surrounded by a broken line denoted by reference numeral 31, and the second region 62 is a region surrounded by a two-dot chain line. In the present embodiment, the predetermined height position is the lower end position of the vehicle body in front of the wheel 20. Here, the lower end position of the vehicle body is the position of the lower end 40a of the flap 40 disposed in front of the wheel 20 when the vehicle is stopped. In the present embodiment, the protrusion dimension L of the flap 40 is particularly maximum. (hereinafter, the maximum that dimension L ₀₎ is the position of the lower end 40a of the vehicle body lower end position. When the vehicle 2 does not have the flap 40, the lower end position of the vehicle body can be the position of the lower surface 5 of the vehicle body in front of the wheel 20. A shutter 30 that can open and close the wheel opening 24 in the first region 61 is provided on the back side of the wheel 20 (inside the vehicle 2). In the side projection view shown in FIG. 2, the shutter 30 only needs to have a structure capable of closing the wheel opening 24. In the closed state, the shutter 30 has a gap between the wheel opening 24 and the shutter 30 in the vehicle width direction. May be formed.

  The shutter 30 is configured to be movable between an open position that opens the wheel opening 24 in the first region 61 and a closed position that substantially closes the wheel opening 24. As shown in FIGS. 3 and 4, the shutter 30 includes a shutter unit 31, a support unit 32, and a drive unit 33.

  The shutter portion 31 is configured by a plate-like member, and is formed in a substantially arc shape so that the entire wheel opening portion 24 in the first region 61 can be closed. The support portion 32 is a rod-like member that supports the shutter portion 31, and has a proximal end connected to the drive portion 33 and a distal end connected to the shutter portion 31.

  The drive unit 33 is attached to the housing 56 and drives the shutter unit 31 and the support unit 32 so that the shutter unit 31 and the support unit 32 can rotate in the circumferential direction of the wheel 20. For example, the drive unit 33 includes an electric motor or the like. can do. Further, the drive unit 33 itself may be configured to move around the outer periphery of the housing 56 in an arc shape. In the illustrated example, the drive unit 33 is attached to the outer peripheral portion of the housing 56, but the drive unit 33 is housed in the housing 56 and extends from the outer peripheral portion of the housing 56, and the support portion 32. It is good also as a structure which attaches to the shutter part 31 connected to 1 so that rotation is possible. In addition, the drive unit 33 is not limited to the housing 56, and can be installed in a component that is disposed inside the rim portion 22 of the wheel 20 and does not rotate during traveling, such as a brake caliper.

  As shown in FIG. 4, the shutter 30 is installed with the substantially arcuate plane of the shutter portion 31 facing the vehicle outer surface. As indicated by the arrows, the shutter portion 31 and the support portion 32 can be rotated in the circumferential direction of the wheel 20 by the drive portion 33. Specifically, the shutter portion 31 indicated by a broken line in FIG. It is possible to rotate between a closed position located at 61 and an open position where the shutter portion 31 is located in the second region 62, as indicated by a one-dot chain line in FIG. When the shutter 30 moves to the open position, the shutter 30 opens all of the wheel opening 24 in the first region 61 and part of the wheel opening 24 in the second region 62 and moves to the closed position. The wheel opening 24 in the first region 61 is substantially closed, and the wheel opening 24 in the second region is opened. Such a shutter 30 is provided on at least the left and right front wheels 20 and can also be provided on the left and right rear wheels 20.

  The changeover switch 12 is a switch for switching between a manual control mode for manually controlling the movement of the shutter 30 and an automatic control mode controlled by the control unit 15.

  The open / close switch 13 is a switch for selecting an open mode for opening the shutter 30 and a closed mode for closing the shutter 30 when the manual control mode is selected by the changeover switch 12.

  The flap detection sensor 14 detects the protruding dimension L of the flap 40 and is installed in the vicinity of the flap 40. The vehicle speed sensor 11, the changeover switch 12, the open / close switch 13, and the flap detection sensor 14 are each connected to the control unit 15.

The control unit 15 operates the drive unit 33 based on the vehicle speed detected by the vehicle speed sensor 11 in the automatic control mode and the protruding dimension of the flap 40 detected by the flap detection sensor 14. In the manual control mode, the drive unit 33 is operated based on a signal from the open / close switch 13. Specifically, the drive unit is configured to open the shutter 30 when the signal for selecting the open mode is received from the open / close switch 13 and to close the shutter 30 when the signal for selecting the close mode is received. 33 is activated. The control unit 15 is set with a speed threshold value _VA for determining whether or not the vehicle 2 is traveling at a high speed that is equal to or higher than a predetermined speed. The dimensional threshold L _A for projecting dimension of the flap 40 is equal to or more than a predetermined size are set. Here, the dimension threshold L _A is the maximum dimension L ₀ of the flap 40.

  Next, movement control of the shutter 30 by the control unit 15 will be described. FIG. 5 is a flowchart showing processing performed by the control unit 15.

  First, the control unit 15 determines whether the movement control of the shutter 30 is in the automatic control mode based on a signal from the changeover switch 12 (step S101).

When it is in the automatic control mode (step S101: Yes), the control unit 15 determines whether the vehicle speed V of the vehicle 2 is equal to or higher than the threshold value _VA based on the detection value of the vehicle speed sensor 11 (step S102).

When the vehicle speed V is lower than the threshold value _VA (step S102: No), the control unit 15 operates the drive unit 33 to move the shutter 30 to the open position (step S103). Thereafter, the process ends (returns).

Vehicle speed V is equal to or larger than the threshold value _{V A} (step S102: Yes), on the basis of the detection result of the flap detection sensor 14, the projecting dimension of the flap 40 is determined whether more than a predetermined size threshold _{L A} (step S104).

If the projecting dimension greater than the dimension threshold _{L A} (step S104: Yes), the control unit 15 actuates the driving unit 33 moves the shutter 30 in the closed position (step S105). Thereafter, the process ends (returns).

If the projecting dimension smaller dimensions threshold _{L A} (step S104: No), the control unit 15 actuates the driving unit 33 moves the shutter 30 in the open position (step S103). Thereafter, the process ends (returns).

  On the other hand, in step S101, when the selected mode is the manual control mode (step S101: No), the control unit 15 determines whether the signal from the open / close switch 13 is the open mode (step S106). When the signal is in the open mode (step S106: Yes), the drive unit 33 is operated to move the shutter 30 to the open position (step S103), and the process is terminated (returned). When the signal is in the closed mode (step S106: No), the drive unit 33 is operated to move the shutter 30 to the closed position (step S105), and the process is ended (returned).

  In the vehicle airflow control device 1 described above, the shutter 30 opens a part of the wheel opening 24 and closes a part of the wheel opening 24, whereby the airflow flowing out from the wheel opening 24 is Interference with the airflow passing through the side of the vehicle can be suppressed. When traveling, the wheel opening 24 (that is, the wheel in the first region 61) located at a position lower than the lower end of the vehicle body as compared to the wheel opening 24 on the upper side from the lower end of the vehicle body (that is, the wheel opening 24 in the second region 62). Air easily flows out from the opening 24). Therefore, the effect of suppressing the air resistance due to the airflow flowing out from the wheel opening 24 is enhanced by controlling the movement of the shutter 30 to the closed position and closing the wheel opening 24 in the first region 61 during high-speed traveling. Thus, fuel consumption can be improved. At this time, since the wheel opening 24 in the second region 62 is in an open state, it is possible to prevent air from accumulating in the wheel house 3 and increasing the air pressure. As a result, an increase in lift acting on the vehicle 2 is suppressed. On the other hand, when the vehicle is traveling at a low speed, the cooling action of the brake can be enhanced by opening the wheel opening 24 in the first region 61.

  Moreover, the effect of reducing the air resistance can be further enhanced by operating the shutter 30 in accordance with the protrusion dimension of the flap 40 having the air flow rectifying effect. Since the flap 40 is normally controlled so that the protrusion dimension L becomes large during high speed traveling, the fuel consumption can be greatly improved by closing the wheel opening 24 in the first region 61 at this time.

  In addition, when changing the protrusion dimension L of the flap 40 according to a vehicle speed, it is good also as a structure which carries out movement control of the shutter 30 only based on the detection result of the vehicle speed sensor 11, or only the detection result of the flap detection sensor 14. FIG.

(Modification 1)
FIG. 6 shows a first modification of the shutter 30 described above. In the shutter 30 of the first modification, the support portion 32 is bent, and the shutter portion 31 attached to the tip of the support portion 32 is located on the outer side in the vehicle width direction of the brake disc 53. The shutter unit 31 and the support unit 32 can be rotated by the drive unit 33, and move to a closed position where the shutter unit 31 is located in the first region 61 and an open position where the shutter unit 31 is located in the second region 62. Configured to be possible. In the first modification, the shutter portion 31 is arranged at a position closer to the wheel opening 24, thereby suppressing the air flow flowing out from the wheel opening 24 in the first region 61 when moved to the closed position. Can be increased.

(Modification 2)
FIG. 7 shows a second modification of the shutter 30 described above. The shutter 30 of the second modification is configured by the drive unit 33 so that the shutter unit 31 can move in the vehicle width direction. Specifically, the shutter portion 31 moves outward in the vehicle width direction to substantially close the wheel opening 24 in the first region 61 (the position indicated by the solid line in FIG. 7), and the shutter portion 31 It moves to the vehicle width direction inner side so that it may leave | separate from the wheel opening part 24, and it is in the open position (position shown with a dashed-two dotted line in FIG. 7) in which the wheel opening part 24 in the 1st area | region 61 and the 2nd area | region 62 was open | released. It is configured to be movable. In the shutter 30 according to the second modification, when the shutter 30 is moved to the open position, all the wheel openings 24 located in the first region 61 and the second region 62 can be opened, and the brake cooling effect can be enhanced.

(Second Embodiment)
FIG. 8 is a side view similar to FIG. 2 illustrating the vehicle airflow control device 1 according to the second embodiment, and FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. In the second embodiment described below, parts corresponding to those in the first embodiment are denoted by the same reference numerals, and details of the same configuration as in the first embodiment are omitted here. The vehicle airflow control device 1 according to the second embodiment includes two shutters that can open and close the wheel opening 24, that is, a shutter (opening opening / closing means) 30 that is a first shutter, and a second shutter. An intermediate shutter (intermediate opening opening / closing means) 35 is provided.

  In the present embodiment, in addition to the first region 61 and the second region 62, a third region 63 located between the first region 61 and the second region 62 is set in the wheel 20. The third area 63 is set at a position where the flap 40 is arranged in the vertical direction of the vehicle 2. In FIG. 8, the third area 63 is an area surrounded by a broken line denoted by reference numeral 36. In the present embodiment, the first region 61 is set in the same manner as in the first embodiment, and the second region 62 is a region that is adjacent to the third region 63 and located above the third region 63.

  The shutter 30 can open and close the wheel opening 24 in the first region 61 and has the same configuration as that of the first modification in the present embodiment.

  The intermediate shutter 35 includes a shutter unit 36, a support unit 37 that supports the shutter unit 36, and a drive unit 38. The shutter portion 36 is a plate-like member, and is formed in a shape capable of closing the wheel opening 24 in the third region 63 in plan view, as indicated by a broken line in FIG. In the intermediate shutter 35, the shutter unit 36 and the support unit 37 can be rotated in the circumferential direction of the wheel 20 by the driving force of the driving unit 38 attached to the housing 56, and the shutter unit 36 is positioned in the third region 63. Then, a closed position (a position indicated by a solid line in FIG. 9) that substantially closes the wheel opening 24 in the third region 63, and the shutter portion 36 moves to the first region 61 and the wheel opening in the third region 63. 24 is configured to be movable to an open position (a position indicated by an alternate long and short dash line in FIG. 9). The drive unit 38 is connected to the control unit 15, and moves the shutter unit 36 and the support unit 37 to the open position or the closed position according to an instruction from the control unit 15.

  Next, movement control of the shutter 30 and the intermediate shutter 35 by the control unit 15 will be described. FIG. 10 is a flowchart showing processing performed by the control unit 15.

  First, the control unit 15 determines whether the movement control of the shutter 30 is in the automatic control mode based on the signal from the changeover switch 12 (step S201).

When the automatic control mode is set (step S201: Yes), the control unit 15 determines whether the vehicle speed V of the vehicle 2 is equal to or higher than the threshold value _VA based on the detection value of the vehicle speed sensor 11 (step S202).

When the vehicle speed V is lower than the threshold _VA (step S202: No), the control unit 15 operates the drive units 33 and 38 to move the shutter 30 and the intermediate shutter 35 to the open position (step S203). Thereafter, the process ends (returns).

Vehicle speed V is equal to or larger than the threshold value _{V A} (step S202: Yes), on the basis of the detection result of the flap detection sensor 14, the projecting dimension of the flap 40 is determined whether more than a predetermined size threshold _{L A} (step S204).

If the projecting dimension greater than the dimension threshold _{L A} (step S204: Yes), the control unit 15 actuates the respective drivers 33, 38 to move the shutter 30 and the intermediate portion shutter 35 in the closed position (step S205). Thereafter, the process ends (returns).

If the projecting dimension smaller dimensions threshold L _A (step S204: No), the control unit 15 actuates the driving unit 33 to move the shutter 30 in the closed position, the intermediate portion shutter 35 actuates the driving unit 38 Move to the open position (step S206). Thereafter, the process ends (returns).

  On the other hand, if the selected mode is the manual control mode in step S201 (step S201: No), the control unit 15 determines whether the signal from the open / close switch 13 is the open mode (step S207). When the signal is in the open mode (step S207: Yes), the drive units 33 and 38 are operated to move the shutter 30 and the intermediate shutter 35 to the open position (step S203), and the processing is ended (returned). When the signal is in the closed mode (step S207: No), the drive units 33 and 38 are operated to move the shutter 30 and the intermediate shutter 35 to the closed position (step S205), and the process is ended (returned).

  The vehicle airflow control device 1 according to the present embodiment has the same effect as that of the first embodiment, and appropriately controls the turbulence of the airflow generated in the third region 63 by the flap 40 and the intermediate shutter 35. Thus, the aerodynamic performance can be further improved. Specifically, when the projecting dimension L of the flap 40 is reduced and the lower end position of the vehicle body is increased, the shutter 30 and the intermediate shutter 35 are closed, and the projecting dimension L of the flap 40 is increased. When the lower end position of the vehicle body is lowered, only the shutter 30 is set to the closed position, so that the lower side wheel opening 24 is appropriately closed from the lower end position of the vehicle body even when the lower end position of the vehicle body is changed. , Fuel efficiency can be improved.

  In addition, this invention is not limited to each embodiment mentioned above, A various change is possible in the range which does not deviate from the meaning of invention. For example, when the shutter 30 is in the closed position, at least a part of the wheel opening 24 in one of the first region 61 and the second region 62 is closed and the wheel opening 24 in the other region is closed. What is necessary is just to be able to open at least a part of. For example, when the shutter 30 is in the closed position, a part of the wheel opening 24 in the first region 61 is closed and a part of the wheel opening 24 in the second region 62 is closed (that is, a part is opened). And a configuration in which, when the shutter 30 is in the closed position, a part of the wheel opening 24 in the first region 61 is closed and the whole wheel opening 24 in the second region 62 is opened. can do. In this case, the shape of the shutter part 31 can be appropriately set according to the range to be closed.

  Further, the intermediate shutter 35 can change the arrangement position and the moving direction of the shutter 36 as in the shutters 30 of the first and second modifications. For example, as in the second modification, the wheel opening 24 in the third region 63 is opened by moving the shutter portion 36 inward in the vehicle width direction, and the third region 63 is moved out in the vehicle width direction. You may make it make the wheel opening part 24 in a closed state.

DESCRIPTION OF SYMBOLS 1 Vehicle airflow control apparatus 3 Wheelhouse 11 Vehicle speed sensor 12 Changeover switch 13 Open / close switch 14 Flap detection sensor 15 Control unit (control part)
20 Wheel 24 Wheel opening 30 Shutter (opening opening / closing means)
33, 38 Drive unit 35 Intermediate shutter (intermediate opening opening / closing means)
40 flaps

Claims (5)

In a vehicle airflow control device provided with an opening / closing means provided on a vehicle wheel and capable of being controlled to move between an open position where a wheel opening is opened by a control unit and a closed position where the wheel opening is closed ,
In the closed position, the opening opening / closing means is provided in one of the first region below the predetermined height position of the wheel and the second region located above the first region. An airflow control device for a vehicle, wherein at least a part of the wheel opening is closed and at least a part of the wheel opening in the other region is opened. The predetermined height position is a lower end position of the vehicle body in front of the wheel,
2. The vehicle airflow control device according to claim 1, wherein the opening portion opening / closing means closes at least a part of the wheel opening portion in the first region in the closed position. A protrusion that protrudes downward from the lower surface of the vehicle body in front of the wheel house that houses the wheel, and includes a flap that can change the protruding dimension,
The vehicle airflow control device according to claim 1, wherein the control unit moves the opening opening / closing means to an open position or a closed position in accordance with a projecting dimension of the flap. The wheel is provided with intermediate opening opening / closing means capable of opening and closing the wheel opening in a third region between the first region and the second region and in which the flap is disposed in the vertical direction. ,
4. The vehicle airflow control device according to claim 3, wherein the control unit moves the intermediate opening opening / closing means to an open position or a closed position in accordance with a projecting dimension of the flap.   The said control part moves the said opening part opening-closing means to an open position or a closed position according to the speed of a vehicle, The airflow control apparatus for vehicles of any one of Claims 1-4 characterized by the above-mentioned.

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