Air guiding device for a motor vehicle, in particular a passenger car, and motor vehicle

Abstract

The invention relates to an air guiding device (24) for a motor vehicle (10), comprising at least one wheel spoiler (26) which can be arranged in the longitudinal direction (30) of the vehicle in front of a corresponding wheel (16) of the motor vehicle (10), the wheel spoiler in its installed position protruding downwards in the vertical direction (34) of the vehicle relative to an adjacent underbody area (28) of the motor vehicle (10) and having an air guiding edge (36) on its downwardly pointing side (S), the air guiding edge having at least one straight first length extent (L1) and a straight first length extent (L2) which, in the installed position of the wheel spoiler (36), is directly connected to the straight first length extent (L1) in the transverse direction of the vehicle. The invention relates to a non-straight second length range (L2) surrounding a wheel spoiler (26), wherein the straight first length range (L1) is directly connected to the non-straight second length range (L2) from the inside in the vehicle transverse direction (32) at the installation position of the wheel spoiler (26), and the non-straight second length range is at least partially covered by the corresponding wheel (16) in its straight forward position in the vehicle longitudinal direction (30) at the installation position of the wheel spoiler (26), and the non-straight second length range (L2) has a plurality of protrusions (38) and depressions (40) arranged alternately in sequence in the vehicle transverse direction (32) at the installation position of the wheel spoiler (26).

Description

Technical Field

[0001] The invention relates to an air guiding device for a motor vehicle, in particular a passenger car, according to the preamble of claim 1. The invention also relates to a motor vehicle, in particular a passenger car, having at least one such air guiding device. Background Art

[0002] DE 10 2009 040 678 A1 discloses an air guiding device for a motor vehicle, comprising a wheel spoiler that can be arranged in an area in front of the respective wheel. The wheel spoiler, in its installed position, protrudes downward in the vertical direction of the vehicle relative to an adjacent underbody area of ​​the motor vehicle and has an air guiding edge on its downwardly directed side. The air guiding edge of the wheel spoiler is designed to be non-straight over a length and has projections and depressions. Summary of the Invention

[0003] The object of the present invention is to provide an air-guiding device for a motor vehicle, and a motor vehicle having such an air-guiding device, by means of which particularly advantageous aerodynamics of the motor vehicle can be achieved.

[0004] This object is achieved according to the invention by an air guiding device having the features of claim 1 and a motor vehicle having the features of claim 9. Advantageous embodiments of the invention are the subject matter of the dependent claims.

[0005] A first aspect of the present invention relates to an air guidance device for a motor vehicle, preferably designed as a passenger car. The air guidance device includes at least one wheel spoiler, which can be arranged in the longitudinal direction of the vehicle in front of a corresponding wheel of the motor vehicle, also referred to as a vehicle wheel. In its installed position, the wheel spoiler projects downwardly in the vertical direction of the vehicle relative to an adjacent underbody region of the motor vehicle. The wheel spoiler assumes its installed position in the fully manufactured state of the motor vehicle, and thus assumes its installed position while the wheel spoiler is attached to the motor vehicle or a component of the motor vehicle. In the installed position of the wheel spoiler, i.e., in the fully manufactured state of the motor vehicle, an underbody region is adjacent to the wheel spoiler, for example, in the transverse and / or longitudinal direction of the vehicle. In its installed position, the wheel spoiler projects downwardly from the underbody region in the vertical direction of the vehicle, and thus extends downwardly from the underbody region in the vertical direction of the vehicle. In its installed position, the side of the wheel spoiler that points downward in the vertical direction of the vehicle, also referred to as the lower side, has an air guidance edge, also referred to as the lower edge, that extends in the transverse direction of the vehicle. In this case, it is preferably provided that the wheel spoiler in its installed position, i.e. with respect to its installed position in the vertical direction of the vehicle, ends downwardly at the air guide edge. In particular, it can be provided that, in the installed position of the wheel spoiler, viewed downwardly in the vertical direction of the vehicle, the air guide edge is or forms the lowest point of the wheel spoiler.

[0006] The air-guiding edge has at least one straight first length range. The straight first length range is understood to mean that the air-guiding edge is formed or extends at least substantially straight or in a straight shape within the first length range, such that the air-guiding edge within the straight first length range does not have elevations and depressions that are arranged alternately in the vehicle transverse direction in the installed position of the wheel spoiler and extend in the vehicle vertical direction. Furthermore, the air-guiding edge has a non-straight second length range that directly connects to the straight first length range in the vehicle transverse direction in the installed position of the wheel spoiler. The second length range being directly connected to the first length range in the vehicle transverse direction in the installed position of the wheel spoiler is understood to mean that no other length range of the air-guiding edge is arranged between the first and second length ranges in the vehicle transverse direction relative to the installed position of the wheel spoiler. The second length range being non-straight is understood to mean that the non-straight second length range is formed or extends non-straight or in a non-straight shape, and therefore, does not extend straight or in a straight shape in the vehicle transverse direction relative to the installed position of the wheel spoiler, for example.

[0007] To achieve particularly favorable aerodynamics for a motor vehicle, the present invention provides that, in the installed position of the wheel spoiler, a straight first length extent of the air-guiding edge directly connects to a non-straight second length extent in the vehicle transverse direction from the inside. Conversely, in the installed position of the wheel spoiler, the non-straight second length extent of the air-guiding edge directly connects to the straight first length extent from the outside in the vehicle transverse direction. In other words, in the installed position of the wheel spoiler, the non-straight second length extent is arranged further outward in the vehicle transverse direction than the straight first length extent. Furthermore, according to the present invention, in the installed position of the wheel spoiler, the non-straight second length extent is at least partially covered in the vehicle longitudinal direction rearward by the corresponding wheel in a straight-ahead position. Conversely, according to the present invention, in the installed position of the wheel spoiler, i.e., in the fully manufactured state of the motor vehicle, the wheel is covered in the vehicle longitudinal direction forward by at least a portion of the non-straight second length extent. Thus, for example, compared to conventional solutions, an improved aerodynamics of the airflow around the wheel can be achieved when the motor vehicle is moving forward. Wheel flow refers to the flow of air around the wheels when the motor vehicle is moving forward, particularly from front to rear in the longitudinal direction of the vehicle. The non-straight second length range particularly favorably influences wheel flow or the air flowing around the wheels, causing the air to flow around the wheels in a particularly favorable manner. Overall, the air guidance device according to the present invention can reduce the air resistance of the motor vehicle compared to conventional solutions, enabling particularly energy-efficient operation of the motor vehicle, i.e., particularly fuel-efficient operation.

[0008] The straight-ahead position of a wheel is understood to mean a position of the wheel that enables or will enable the motor vehicle to travel straight ahead. The wheel may be a steerable or steerable wheel and, therefore, can pivot relative to the motor vehicle body, for example, a self-supporting vehicle body, about a steering axis, in particular extending at least substantially in the vertical direction of the vehicle, in order to cause the motor vehicle to turn and / or change direction, for example, during the aforementioned forward motion of the motor vehicle. Thus, for example, the wheel can pivot about the pivot axis to a plurality of different pivot positions. One of the pivot positions is the straight-ahead position, into which the wheel pivots to prevent the motor vehicle from changing lanes or direction, or to enable the motor vehicle to travel straight ahead, or the aforementioned straight ahead motion. In particular, the wheel may be a front wheel. However, it is also conceivable that the wheel may be a rear wheel, in particular in the case of rear-axle steering. Furthermore, it is conceivable that the wheel may be a non-steerable wheel, i.e., a non-steerable wheel, that is, one that cannot cause the motor vehicle to turn or change direction. Thus, the wheel is always in its straight-ahead position. A wheel, also called a vehicle wheel, is a ground-contacting element of a motor vehicle that, in its fully manufactured state, is supported or can be supported on the ground in the vertical direction of the vehicle by the wheel. The wheel, in particular the tire, directly contacts the ground. If the motor vehicle is traveling forward along the ground while the wheel is supported on the ground in the vertical direction of the vehicle, the wheel rolls along or on the ground. In this case, the wheel assumes its straight-ahead position, particularly when the motor vehicle, in its fully manufactured state, is supported on the ground in the vertical direction of the vehicle by the wheel and is stationary, and particularly when the steering device of the motor vehicle, which is designed to cause the motor vehicle to turn and change direction, is adjusted to produce straight-ahead travel or as described above.

[0009] The present invention is particularly based on the consideration that the air resistance of a motor vehicle plays a major role in range and fuel consumption, particularly at higher driving speeds. Therefore, the air flow around the wheels significantly contributes to the vehicle's overall air resistance. Wheel spoilers are arranged in front of the wheels in the longitudinal direction of the vehicle, i.e., upstream of the wheels in the direction of flow of air flowing around the wheels from front to rear in the longitudinal direction of the vehicle. Compared to embodiments in which the vehicle is not equipped with such wheel spoilers, such wheel spoilers can have a positive aerodynamic impact on the air flow around the wheels and lead to a significant reduction in overall air resistance. Compared to conventional wheel spoilers, the present invention can significantly further reduce air resistance, thereby enabling particularly efficient driving of the motor vehicle.

[0010] According to the invention, in order to achieve particularly advantageous airflow around the wheels and thus particularly advantageous aerodynamics of the motor vehicle, it is further provided that the non-straight second length range has, at the installation location of the wheel spoiler, a plurality of projections and depressions arranged alternately one after the other in the transverse direction of the vehicle.

[0011] In this case, it is particularly advantageous if the respective depression and / or respective projection, also referred to as a protrusion,—particularly in the installed position of the wheel spoiler—has a height that extends at least substantially in the vehicle vertical direction, i.e., at least substantially parallel to the vehicle vertical direction, or at an angle relative to the vehicle vertical direction, and a width that extends perpendicularly to the height, for example, at least substantially in the vehicle transverse direction, i.e., at least substantially parallel to the vehicle transverse direction, or at an angle relative to the vehicle transverse direction. In particular, the height extends in a first direction and the width extends in a second direction perpendicular to the first direction, wherein the first and second directions form a first plane, for example, parallel to or coinciding with a second plane formed by the vehicle transverse direction and the vehicle vertical direction in the installed position of the wheel spoiler. Alternatively or additionally, the vehicle longitudinal direction, relative to the installed position of the wheel spoiler, is perpendicular to the first plane formed by the first and second directions. In this regard, it has proven particularly advantageous if the quotient formed by the width as the dividend and the height as the divisor lies within a closed interval between 0.5 and 2. In other words, for example, if the width is denoted by λ and the height by l, then preferably:

[0012] 0.5≤λ / l≤2.

[0013] Another embodiment is characterized in that, in the installed position of the wheel spoiler, a first distance extending in the vehicle vertical direction between the first straight length extent and the ground on which the motor vehicle is standing is greater than a second distance extending in the vehicle vertical direction between the second non-straight length extent and the ground, the first distance also being referred to as a first ground clearance, and the second distance also being referred to as a second ground clearance, wherein the motor vehicle is supported downwardly on the ground in the vehicle vertical direction by the wheels. As a result, when the motor vehicle is traveling forward in the vehicle longitudinal direction, air flowing from the front to the rear toward the wheels can be particularly favorably influenced by the wheel spoiler, thereby enabling particularly good airflow around the wheels.

[0014] In order to particularly advantageously adjust or influence the airflow around the wheel, a further embodiment of the present invention provides that, in the installed position of the wheel spoiler, at least a major portion of the extension of the non-straight second length range, or in other words, the extension in the vehicle transverse direction, i.e., more than half, preferably only more than a quarter, and in particular only more than a third, of the extension of the non-straight second length range is covered in the vehicle longitudinal direction rearward by the corresponding wheel in the straight-ahead position. Conversely, in the installed position of the wheel spoiler, preferably, the wheel or at least a portion of the wheel is overlapped or covered in the vehicle longitudinal direction forward by more than half of the extension of the second length range, as viewed in the vehicle transverse direction, thereby achieving particularly advantageous aerodynamics. This major portion of the length of the second length range is also referred to as the first portion.

[0015] In another particularly advantageous embodiment of the invention, in the installed position of the wheel spoiler, a second portion of the length of the non-straight second length range is directly connected to the first portion from the inside in the vehicle transverse direction, the second portion being arranged offset / staggered inwardly relative to the wheel in the straight-ahead position in the vehicle transverse direction. This can particularly advantageously influence the airflow around the wheel.

[0016] To achieve particularly favorable aerodynamics, a further embodiment of the present invention provides that the non-straight second length range is formed in a sawtooth shape. Thus, the projections are sawteeth arranged sequentially in the vehicle transverse direction, thereby forming depressions (also referred to as recesses) arranged between each two adjacent sawteeth. Alternatively, the projections define the depressions outwardly on both sides in the vehicle transverse direction. This can particularly advantageously influence the airflow around the wheel.

[0017] It has proven advantageous for achieving particularly favorable wheel flow if, in the installed position of the wheel spoiler, the straight first length extent is arranged completely offset inward in the vehicle transverse direction relative to the wheel in the straight-ahead position. This means that, preferably, in the installed position of the wheel spoiler, the wheel is not covered forward in the vehicle longitudinal direction by the straight first length extent. Furthermore, it is conceivable that, in the installed position of the wheel spoiler, the wheel or a portion of the wheel is covered forward in the vehicle longitudinal direction by a straight third length extent.

[0018] Finally, it has proven particularly advantageous if, in the installed position of the wheel spoiler, the width of the wheel in the straight-ahead position extending in the transverse direction of the vehicle is at least largely, i.e. at least more than half, covered forward in the longitudinal direction of the vehicle by a second, non-straight length range, so that air flows around the wheel particularly advantageously when the motor vehicle is moving forward.

[0019] With the aid of the wheel spoiler, and in particular with the aid of the non-straight second length range, turbulence can be introduced into the air, in particular into the air flow, that flows around the wheel spoiler and the wheel from front to rear in the longitudinal direction of the vehicle when the motor vehicle is traveling forward. This turbulence provides energy for the boundary layer flow along the side of the wheel tire. The resulting more turbulent boundary layer flow, also known as tire boundary layer flow, can advantageously overcome large pressure increases, so that the boundary layer flow remains in contact with the wheel for a longer time. Compared to conventional solutions, this leads to an aerodynamically improved flow around the wheel and can reduce flow losses caused by detached flow compared to conventional solutions. Overall, this leads to a reduction in the total air resistance of the motor vehicle compared to conventional solutions. Unlike conventional solutions, in which the goal is to stabilize the shear layer closer to the inside, the present invention achieves targeted turbulence generation in the air flow around the wheel when traveling forward, thereby achieving particularly advantageous aerodynamics.

[0020] A second aspect of the present invention relates to a motor vehicle, preferably designed as a passenger car, having at least one air guiding device according to the first aspect of the present invention. Advantages and advantageous embodiments of the first aspect of the present invention are to be regarded as those of the second aspect of the present invention, and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Further advantages and details of the present invention can be obtained from the following description and the accompanying drawings. In the drawings:

[0022] Figure 1 shows a section of a schematic side view of a motor vehicle designed as a passenger car, comprising an air-guiding device with a wheel spoiler, the wheel spoiler comprising an air-guiding edge with a straight first length extent and a non-straight second length extent, the non-straight second length extent being directly connected to the first length extent from the outside in the vehicle transverse direction in the installed position of the wheel spoiler;

[0023] Figure 2 shows a schematic front view of an air guide arrangement; and

[0024] Figure 3 Shows the air guide device Figure 2 An enlarged view of the area indicated by reference symbol B in FIG.

[0025] In the figures, identical or functionally identical elements are denoted by the same reference numerals. DETAILED DESCRIPTION

[0026] Figure 1A section of a schematic side view of a motor vehicle designed as a passenger car 10 is shown, whose body designed as a self-supporting vehicle body is designated by reference numeral 12. The body 12 defines an interior space of the passenger car 10, also referred to as a cabin or passenger compartment, in which an occupant, such as the driver of the passenger car 10, can be accommodated during a journey of the passenger car 10. Figure 1 In the figure, the wheel arch 14 of the passenger car 10 can also be seen. In the wheel arch 14, a wheel 16 of the passenger car 10 is at least partially accommodated, in this case in the form of a front wheel, in particular a left front wheel, which is also called a vehicle wheel. The wheel 16 is a ground-contacting element, through which the ground-contacting element, such as Figure 2 As shown schematically in FIG, a passenger vehicle 10 can be supported or can be supported from below in a vertical vehicle direction on a preferably at least substantially horizontal ground surface 18. The wheel 16 includes a rim 20 and a tire 22 mounted on the rim 20, the tire directly contacting the ground surface 18. Figure 1 and Figure 2 The passenger vehicle 10 is shown in a stationary and fully constructed state. Furthermore, the steerable wheels 16 are in their straight-ahead position, which causes or can cause the passenger vehicle 10 to move forward, in particular when the passenger vehicle 10 is driven by at least one drive unit and thus moves forward along the ground 18. During this forward movement, the wheels 16, in particular the tires 22, roll directly on the ground 18.

[0027] As in Figure 2 and Figure 3 As can be seen particularly clearly in the combination of the passenger car 10, the passenger car 10 comprises an air guiding device 24 with at least one wheel spoiler 26, which is arranged in the vehicle longitudinal direction in front of the corresponding wheel 16 in the completely manufactured state of the passenger car 10. Figures 1 to 3 In the illustrated installed position, the wheel spoiler 26 protrudes downward in the vertical direction of the vehicle relative to an underbody region 28 of the passenger vehicle 10 adjacent to the wheel spoiler 26, wherein the wheel spoiler 26 assumes its installed position in the fully manufactured state of the passenger vehicle 10. While the vehicle longitudinal direction is indicated by a double arrow 30, the vehicle transverse direction is indicated by a double arrow 32, and the vehicle vertical direction is indicated by a double arrow 34. The vehicle longitudinal direction is also referred to as the x-direction, the vehicle transverse direction is also referred to as the y-direction, and the vehicle vertical direction is also referred to as the z-direction.

[0028] As from Figure 2As can be seen particularly clearly, the wheel spoiler 26 has an air-guiding edge 36 on its side S, which points downward or faces downward in the vertical direction of the vehicle when the wheel spoiler 26 is installed (this side is also referred to as the lower side). In the exemplary embodiment shown in the figures, the wheel spoiler 26 terminates downward in the vertical direction of the vehicle at the air-guiding edge 36, also referred to as the lower edge. The air-guiding edge 36 has a straight first length L1 and a non-straight second length L2, which directly connects to the straight first length in the vehicle transverse direction when the wheel spoiler 26 is installed. It can further be seen that the wheel 16 has a width B2 extending in the vehicle transverse direction, with more than half of the width B2 of the wheel 16 extending in the vehicle transverse direction being overlapped or covered forward in the vehicle longitudinal direction by the wheel spoiler 26.

[0029] To achieve particularly favorable airflow around the wheels and, therefore, particularly favorable aerodynamics for the passenger vehicle 10, the straight first length extent L1 is directly connected to the non-straight second length extent L2 from the inside in the vehicle transverse direction when the wheel spoiler 26 is installed, and therefore in the fully manufactured state of the passenger vehicle 10. Furthermore, in the installed position of the wheel spoiler 26, the second length extent L2 is at least partially, in particular, at least largely, and thus at least more than half, covered in the vehicle longitudinal direction rearward by the corresponding wheel 16 in the straight-ahead position. In the exemplary embodiment shown in the figures, at least more than half of the width B of the wheel 16 extending in the vehicle transverse direction is overlapped or covered in the vehicle longitudinal direction forward by the non-straight second length extent L2.

[0030] exist Figure 2 In the figure, a region of the air guiding device 24, in particular a region of the wheel spoiler 26, is indicated by the reference symbol B. Region B is as follows Figure 3 Shown enlarged. Figure 2 and Figure 3As can be seen particularly clearly in the figure, the non-straight second length range L2 comprises a plurality of projections 38 and depressions 40 arranged alternately in sequence in the vehicle transverse direction when the wheel spoiler 26 is installed. Each depression 40 is bounded on both sides outward in the vehicle transverse direction by exactly two adjacent projections 38 in the vehicle transverse direction. In other words, each depression 40 is arranged between two adjacent projections 38 in the vehicle transverse direction. The projections 38 taper downward in the vehicle vertical direction and terminate at a point, while the corresponding depressions 40 taper upward in the vehicle vertical direction and also taper at their upper ends in the vehicle vertical direction. Consequently, the length range L2 forms a zigzag or zigzag shape. This allows for particularly favorable wheel airflow. Wheel airflow refers to the flow of air around the wheels 16 when the passenger vehicle 10 is moving forward, particularly when the passenger vehicle 10 is moving forward. The air or air flow around the wheel 16 can be particularly advantageously influenced or regulated by the wheel spoiler 26 and in particular by the length range L2 , so that particularly advantageous aerodynamics can be achieved.

[0031] from Figure 3 It can be seen that the corresponding protrusion 38 and thus the corresponding recess 40 have a height l and a width λ. The height l extends along a first direction, and the width λ extends along a second direction extending perpendicular to the first direction. The first direction can extend parallel to the vertical direction of the vehicle or slightly inclined thereto. Alternatively or additionally, the second direction can extend parallel to the transverse direction of the vehicle or slightly inclined thereto. The first direction and the second direction form a first plane, which extends parallel to or coincides with a second plane, also referred to as the yz plane, wherein the second plane is formed by the transverse direction of the vehicle (y direction) and the vertical direction of the vehicle (z direction). Therefore, the longitudinal direction of the vehicle (x direction) is perpendicular to the first plane, and therefore perpendicular to the first direction and perpendicular to the second direction. In this case, it is preferably provided that the quotient of the width λ and the height l is within a closed interval of 0.5 to 2.

[0032] Furthermore, it can be seen that in the installed position of the wheel spoiler 26, a major first portion of the extension of the non-straight second length range L2 in the vehicle transverse direction or in the aforementioned first plane is covered in the vehicle longitudinal direction rearward by the corresponding wheel 16 in a straight forward position, and vice versa. Figure 2denoted by reference symbol T1. A second portion T2 of the length of the length range L2 directly connects from the inside in the vehicle transverse direction to the first portion T1 of the length range L2, wherein the second portion T2 is significantly smaller, and in particular, less than half, and in particular, less than one-third, of the first portion T1. It can be seen that the second portion T2 is arranged offset inwardly relative to the wheel 16 in the vehicle transverse direction, such that the wheel 16 is not overlapped or covered forwardly by the second portion T2 in the vehicle longitudinal direction. Furthermore, in the installed position of the wheel spoiler 26, the straight first length range L1, which directly and therefore non-indirectly connects from the inside in the vehicle transverse direction to the second portion T2, is arranged completely offset inwardly in the vehicle transverse direction relative to the wheel 16 in its straight-ahead position, such that the wheel 16 is not overlapped or covered forwardly in the vehicle longitudinal direction in its straight-ahead position by the length range L1.

[0033] Furthermore, it is assumed that in the installation position of the wheel spoiler 26 as shown in the figure, a first ground clearance BA1 extending in the vertical direction of the vehicle between a first straight length range L1 representing the straight bottom edge portion and the ground 18 is greater than a second ground clearance BA2 extending in the vertical direction of the vehicle between a second non-straight length range L2 representing the non-straight bottom edge portion and the ground 18. This can represent particularly advantageous aerodynamics.

Claims

1. An air guiding device (24) for a motor vehicle (10), comprising at least one wheel spoiler (26) which can be arranged in the longitudinal direction of the vehicle (30) in front of a corresponding wheel (16) of the motor vehicle (10), the wheel spoiler in its installed position protruding downwardly in the vehicle vertical direction (34) relative to an adjacent underbody area (28) of the motor vehicle (10) and having an air guiding edge (36) on its downwardly pointing side (S) extending in the vehicle transverse direction, the air guiding edge having at least one straight first length extent (L1) and a non-straight second length extent (L2), the non-straight second length extent being directly connected to the straight first length extent in the vehicle transverse direction (32) in the installed position of the wheel spoiler (26), It is characterized by: The straight first length range (L1) is directly connected from the inside in the vehicle transverse direction (32) to the non-straight second length range (L2) in the installation position of the wheel spoiler (26), and the non-straight second length range is at least partially covered by the corresponding wheel (16) in the straight forward position in the vehicle longitudinal direction (30) in the installation position of the wheel spoiler (26), and the non-straight second length range (L2) has a plurality of protrusions (38) and depressions (40) arranged alternately in succession in the vehicle transverse direction (32) in the installation position of the wheel spoiler (26), The non-straight second length range (L2) is formed in a zigzag shape. In the installed position of the wheel spoiler (26), the straight first length range (L1) is arranged completely offset inwardly in the vehicle transverse direction (32) relative to the wheel (16) in the straight-ahead position, In the installed position of the wheel spoiler (26), a width (B2) of the wheel (16) in the straight-ahead position extending in the vehicle transverse direction (32) is at least largely covered forward in the vehicle longitudinal direction (30) by a non-straight second length range (L2).

2. The air guiding device (24) according to claim 1, It is characterized by: The respective protrusion (38) and / or the respective depression (40) has a height (l) and a width (λ) extending perpendicular to the height, wherein the quotient of the width (λ) as dividend and the height (l) as divisor is within a closed interval of 0.5 to 2.

3. The air guiding device (24) according to any one of the preceding claims, It is characterized by: In the mounted position of the wheel spoiler (26), a first distance (BA1) extending in the vehicle vertical direction (34) between the straight first length range (L1) and the ground (18) on which the motor vehicle (10) is supported downwardly in the vehicle vertical direction (34) by the wheels (16) is greater than a second distance (BA2) extending in the vehicle vertical direction (34) between the non-straight second length range (L2) and the ground (18).

4. The air guiding device (24) according to any one of the preceding claims, It is characterized by: In the mounted position of the wheel spoiler (26), at least a major portion (T1) of the length of the non-straight second length range (L2) extending in the vehicle transverse direction (32) is covered rearwardly in the vehicle longitudinal direction (30) by the corresponding wheel (16) in the straight-ahead position.

5. The air guiding device (24) according to claim 4, It is characterized by: In the installed position of the wheel spoiler (26), a second portion (T2) of the non-straight second length range (L2) directly connected to the portion (T1) from the inside in the vehicle transverse direction is arranged offset inwardly in the vehicle transverse direction relative to the wheel (16) in the straight-ahead position.

6. A motor vehicle (10) having at least one air guiding device (24) according to any one of the preceding claims.

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