DE102024205832B3 - Aerodynamic rear carrier system for a vehicle and vehicle - Google Patents

Abstract

The invention relates to an aerodynamic rear carrier system (10) for a vehicle (50) having a substructure (12), a roof element (14), and two side elements (16), which is detachably arranged on a vehicle (50) in order to improve its airflow resistance and also to be able to transport additional luggage or bicycles (56). The roof element (14) is suspended from the upper edge of the tailgate (52) of the vehicle (50), and the substructure (12) is held on a vehicle-specific support system (54). The side elements (16) are each detachably connected to the roof element (14) and the substructure (12). The invention further relates to a vehicle (50) having such a rear carrier system (10).

Description

The invention relates to an aerodynamic rear carrier system for a vehicle, comprising a substructure, a roof element, and two side elements. The system is detachably mounted on a vehicle to improve its airflow resistance and also to transport additional luggage or bicycles. The roof element is suspended from the upper edge of the vehicle's tailgate, and the substructure is held on a vehicle-specific support system. The side elements are each detachably connected to the roof element and the substructure. The invention also relates to a vehicle with such a rear carrier system.

As is well known, the transport volume of a vehicle is limited. If additional loads such as luggage or even bicycles are to be transported, attachments or superstructures must be provided on the vehicle. These can be bicycle racks and/or transport boxes mounted on the vehicle or at its rear. However, these have a negative impact on the vehicle's drag. However, attachments on the rear of the vehicle are easier to reach and use than those on the roof.

Another question is whether the attachments should be removed when not in use or left on the vehicle. Due to their space requirements and weight, they negatively impact the vehicle's airflow resistance and thus its energy consumption.

Therefore, attempts have already been made to provide solutions that address the desire for higher transport volumes and, at the same time, lower vehicle consumption. DE 10 2010 052 407 A1 A solution with a foldable rear module designed to influence the vehicle's drag. The rear module is folded out into its operational position for use.

A similar system shows the DE 10 2010 021 905 A1 , which features a rear module with a tub- or plate-like base body with hinged wall elements and a retractable roof structure, whereby the rear module can be used as an open loading area or as a closed loading space. The rear module is mounted, for example, on the trailer coupling.

The invention is based on the object of proposing a solution for a rear attachment of a vehicle which optimizes the flow resistance of the vehicle and, in the best case, can be left unchanged on the vehicle, even when it is not in use.

The object of the invention is achieved by the subject matter of the independent claims. Further preferred embodiments of the invention emerge from the remaining features mentioned in the subclaims.

• • das Heckträgersystem lösbar mit dem Fahrzeug verbunden ist,
• • das Heckträgersystem eine aerodynamische Formgebung aufweist, und
• • der Unterbau auf einem fahrzeugeigenen Tragsystem anzuordnen ist, und ist dadurch gekennzeichnet, dass
• • das Dachelement um eine y-Achse schwenkbar ist, und
• • das Dachelement mittels gepolsterter Träger an einer Kante der Heckklappe des Fahrzeugs einzuhängen ist.

An aerodynamic rear carrier system for a vehicle is formed with a substructure, a roof element and two side elements, each of which is detachably connected to the substructure and the roof element, wherein

• • the rear carrier system is detachably connected to the vehicle,
• • the rear carrier system has an aerodynamic shape, and
• • the substructure is to be arranged on a vehicle's own support system and is characterized in that
• • the roof element can be pivoted around a y-axis, and
• • the roof element is to be hung on an edge of the vehicle's tailgate using padded supports.

The aerodynamic rear carrier system according to the invention is therefore essentially formed with four main components, namely the substructure, the roof element, and the two side panels. The rear carrier system is thus closed off to the outside on four of its sides (top, bottom, and sides). The resulting outer contour of the rear carrier system should have an aerodynamic shape, i.e., a shape that optimizes or reduces the vehicle's flow resistance. This can, for example, include continuing the contours of the vehicle, so that the outer shape of the rear carrier system forms an extension or continuation of the vehicle's shape. For example, edges of the vehicle can determine the position and orientation of the edges of the rear carrier system. Above all, the cross-sectional area of the outer contour of the rear carrier system should be continuously reduced through the shape, for example, by indenting the outer surfaces by 5° to 20° relative to the vehicle's longitudinal axis (x-axis).

The entire rear carrier system is detachably connected to the vehicle, meaning it can be attached and removed.

The roof element of the rear carrier element should be a predominantly flat element, which is attached to a The opening direction of the tailgate is irrelevant, as long as the padded supports can be hooked onto an upper edge when the tailgate is open. It is therefore irrelevant whether the tailgate swings upwards about a horizontal axis when opened or swings sideways about a vertical axis. At least two padded supports are provided to ensure secure hold. These are shaped like a hook and grip behind the edge of the tailgate to hold the roof element. The roof element can have areas shaped downwards on the sides to stabilize its shape.

The roof element should be able to pivot upwards around an axis parallel to the vehicle's y-axis to facilitate access to the interior of the rear carrier system for loading or unloading bicycles or luggage. For this purpose, joints in the supports or bearings between the supports and the roof element can be provided to allow this rotation around the horizontal axis of rotation. Preferably, such joints or bearings should have multiple locking points to allow for the targeted adjustment and stopping of the upward and downward movement, so that the roof element, for example, does not hit the ceiling of a pet garage when opened upwards.

The roof element acts as a roof, protecting the cargo underneath from rain, for example. It also acts as a spoiler, influencing the airflow around the vehicle. To achieve this, it preferably extends the roof surface rearward, particularly by embracing and continuing the orientation and/or curvature of the vehicle roof.

The roof element can be made of plastic or fiber-reinforced plastic. It can also have internal metal reinforcements to ensure stability.

The substructure can be seen as the counterpart to the roof element. It is intended to optimize the flow properties on the underside of the rear carrier system and is therefore ideally designed as a shell whose shape specifications correspond analogously to those of the roof element. The substructure is arranged, i.e., positioned, and secured on the vehicle's own support system. The vehicle's own support system can be a trailer hitch or a support system provided by the manufacturer that is installed in or on the vehicle, such as extendable support elements. However, the substructure can also comprise a transport box, also called a rear box, and/or a bicycle rack, as explained below with reference to optional embodiments of the invention.

Due to the high loads the substructure is subjected to, it should be made of metallic materials or fiber-reinforced plastics. However, it can also be constructed with a plastic shell with metal inserts.

Now that the roof element and substructure are in place on the vehicle, the two side elements can be installed. These can be flexible, primarily textile, side elements, or rigid elements such as fiber-reinforced plastic panels. They are connected to the roof element at the top and to the substructure at the bottom. Common fastening systems are suitable for this.

For dismantling, the components described above are dismantled in reverse order.

The rear carrier system described above can reduce the drag of a vehicle carrying additional loads such as luggage or bicycles at its rear. The system is quick and easy to install and remove. However, it doesn't need to be removed when not in use, as it doesn't have a negative impact on the airflow around the vehicle; in fact, it can even reduce fuel consumption.

Since the side elements are attached separately, they can optionally be omitted if, for example, bicycles need to be transported without removing their front wheels, which would otherwise be too wide for the rear carrier system. The remaining roof element and substructure nevertheless have a positive effect on airflow resistance.

According to a first embodiment of the rear carrier system, the substructure comprises a bicycle carrier, a bicycle carrier with a transport box or a transport box, in particular an extendable transport box or a transport box that can be folded to the side.

One transport task for which the rear carrier system is particularly suitable is the transport of bicycles, since by enclosing the bicycles with the rear carrier system, the flow resistance of the vehicle can be significantly reduced compared to transporting bicycles without the rear carrier system.

Accordingly, the substructure can include a bicycle rack, so that it is formed by a lower shell and the bicycle carrier. The bicycle rack can optionally have a load-bearing function, and the lower shell a flow-influencing function. The bicycle rack can be designed to accommodate one or more bicycles, as permitted by the permissible loads of the vehicle's own support system.

The substructure can also include a transport box. This can be a transport box that can be extended or folded to the side to provide access to the vehicle's trunk. Such transport boxes are already known, but their aerodynamically effective design or integration into a system such as the rear carrier system according to the invention are not known.

Optionally, the transport box or its underside can form the lower shell, so that the transport box forms the base. The transport box can also be combined with a bike rack, with holders for one or more bikes provided on its top.

A second embodiment of the rear carrier system according to the invention consists in that the roof element has at least one support on the rear window of the vehicle or on a frame of the vehicle's tailgate. Depending on its specific design, the roof element can be quite large, making it correspondingly heavy. Furthermore, it is exposed to the prevailing flow conditions. Therefore, at least one support should be provided to maintain the position of the roof element.

Preferably, at least two supports are provided, each arranged near the side edges of the roof element. At least one support can rest on the rear window of the vehicle and be secured in position there, for example, using a suction cup. If two supports are provided, they can each rest laterally on the frame of the tailgate or, similar to the roof element's supports, can grip around a side edge of the tailgate, thus securing the position of the roof element.

A particularly preferred embodiment of the rear carrier system provides for the side elements to be constructed as textile side elements. The term "textile" is understood to mean that the side element is made of a fabric made of natural and/or synthetic fibers, which is preferably impregnated to resist water absorption and dirt. Possible materials include PVC-coated fabric (colloquially known as "truck tarpaulin"), sailcloth, nylon, Cordura, and the like. In addition to being lightweight compared to rigid side elements, textile side elements offer flexible design. When not in use, they can be folded and stowed away with minimal space requirements.

The textile side elements can be attached to the substructure and roof element using hook-and-loop fasteners, eyelets, hooks, magnets, or toggles. The corresponding counterparts for the aforementioned fastening methods must, of course, be provided on the roof element and substructure.

Many of these fastening options allow not only simple fastening but also re-tensioning of the side elements if they have expanded due to use or temperature.

To optimize the flow of the side elements to the vehicle, front connection strips are proposed. These are arranged or formed on the side elements on their edge facing the vehicle. These front connection strips are intended to largely close the gap between the rear carrier system or its sides and the vehicle. They can be provided as vehicle-specific preformed connection strips or as adaptable connection strips that are customized to the vehicle by the user. Adaptation is achieved, for example, by two- or three-dimensionally molding the front connection strips to the vehicle by bending them.

The front connecting strips can be arranged on the side elements, i.e. they can be subsequently attached there, or they can be formed on the edges facing the vehicle, i.e. they can already be provided during production, particularly in the case of fixed side elements.

Optionally, foam elements can be provided at least in some areas on the front connecting strips, the compression of which allows further adaptation to the specific vehicle and thus further closing of the gap between the vehicle and the rear carrier system.

A vertical end strip can be arranged or formed on the rear-facing edge of the side elements of the rear carrier system, i.e. the edge facing away from the vehicle. This forms a defined rear End caps for the side elements, which improve the stability of the side elements and have a flow-calming effect on flexible side elements. This can reduce or prevent fluttering of such side elements. When the side elements are designed as textile side elements, this also provides an additional edge for tight tensioning, depending on the fastening method.

As already explained with reference to the front connection strips, the vertical end strips can also be formed directly on the side elements or attached there later.

The rear carrier system can be further developed so that the roof element and/or the substructure are adjustable in width. The goal is to adapt the roof element and/or the substructure to different vehicle widths, allowing the rear carrier system to be used more flexibly, for example, for multiple vehicles in one household.

The desired width adjustment can be achieved, for example, by forming the roof element and/or substructure with at least two parts that can be pushed together and apart in the width direction. Once the desired width is achieved, the position of the at least two parts relative to each other can be fixed, for example, by locking systems on the inside of the roof element and/or substructure, by fixing fasteners in elongated holes, or the like. To prevent jamming when pushing the at least two parts of the roof element apart and together, guides can be provided on the inside along which the sliding movement is guided.

A variant with three sections forming the roof element is preferable, allowing for width adjustment. This allows for a symmetrical roof element to be created with two side sections and a central section. The central section can be inexpensively manufactured as a simple panel and provided with connection options for the side sections and reinforcements.

It may be desirable to provide additional enclosed storage space within the rear carrier system. Therefore, the roof element can be designed as an additional transport box. If the substructure is not designed as a transport box, the roof element is the only transport box. The design of the outward-facing shape is governed by the above. Extending into the interior, the roof element designed as a transport box can be configured in any way dictated by the space available and the permissible loads of the vehicle. This design is preferable for taller vehicles, as the rear carrier system has sufficient height to accommodate the additional transport box.

To protect the objects stored in the rear carrier system (luggage, bicycles) from the elements and dirt, as well as from theft and as a privacy screen, the rear of the rear carrier system can be closed with a flexible cover. A flexible cover refers to textile-based elements, such as the textile side panels described above, which correspond in shape and size to the rear-facing opening of the rear carrier system. As with the textile side panels, they can be attached using hook-and-loop fasteners, toggles, magnets, eyelets, hooks, and the like. The cover is preferably attached all the way around the roof element, the side elements, and the substructure.

Optionally, a fastening system that allows for securing with a lock is available. This could, for example, be a circumferential wire rope that is threaded through eyelets in the cover and the rest of the rear carrier system, with its ends secured with a lock to prevent unauthorized removal.

A further embodiment of the rear carrier system according to the invention takes into account that it may limit the lighting and assistance systems. Therefore, at least one rear light, a third brake light, a sensor for a parking aid, at least one camera, and/or a holder for a repeat license plate are to be arranged on the rear of the rear carrier system.

Each of the aforementioned devices can be obscured in a rear carrier system that occupies the entire rear of the vehicle, thus failing to fulfill its intended purpose. One possible solution is to adapt the rear carrier system and thus reduce its size so that this does not occur. However, the necessary beam angles, especially for lighting devices, must be taken into account, which severely limits the space gained by the rear carrier system. Therefore, it is more advantageous to provide the necessary devices on the rear carrier system and thus (to put it simply) repeat them.

Accordingly, the rear of the rear carrier system in the area of the roof element can have a A third brake light should be provided, which is designed with a suitable connection to the vehicle so that it can indicate braking. At least one rear light and/or a holder for a repeating license plate could be arranged in the underbody area.

To facilitate parking or maneuvering with a vehicle with a rear carrier system, it may be advisable to replace the concealed parking aid sensors and/or one or more concealed cameras with corresponding counterparts on the rear carrier system. These should be positioned at corresponding locations on the rear carrier system to facilitate familiarization and use for the vehicle driver.

For vehicle users who already have a cargo box for their vehicle and/or a bike rack, the rear carrier system can be provided as a retrofit system to improve the vehicle's airflow when the bike rack or cargo box is attached. For this purpose, the user's own bike rack and/or cargo box acts as the base.

The roof element and the side elements are provided as usual, tailored to the vehicle. The user's own bike rack and/or transport box can then form the substructure of the rear carrier system, which is connected to the side elements. However, the user's own bike rack and/or transport box can also form only part of the substructure if a (suitable) lower shell or tensioning system made of textile material is also provided, which provides downward protection and optimizes airflow along the underside of the vehicle and the rear carrier system.

The invention also claims a vehicle with such a rear carrier system according to the invention. The vehicle can be any passenger car, but also a mobile home, a fast transporter, a delivery van, or the like, provided it has a tailgate to which the roof element can be attached. It can prove advantageous, particularly in large mobile homes, if the roof element can be pivoted downwards around the y-axis to shorten the vehicle when the rear carrier system is not in use.

Some motorhomes have wing doors instead of a tailgate, which pivot around a vertical axis when opened. In this case, it is helpful if the roof element is divisible. The roof element should be at least two-part and held together with a detachable, preferably easily detachable, connection that can be released when a vehicle user wishes to access the rear storage space of the motorhome. If the rear of such a motorhome is to be opened, this detachable connection of the roof element is released, and if necessary, the side elements as well. The motorhome's wing doors can then be opened. Optionally, the divisibility of the roof element can be combined with the width adjustment of the roof element.

If a motorhome doesn't have the option of attaching the roof element to an edge using brackets, it must be attached to the motorhome structure using other methods. This may involve screwing or gluing large attachment points.

The rear carrier system according to the invention now proposes a solution for increasing the transport volume of a vehicle while simultaneously improving the vehicle's airflow. The proposed system can remain on the vehicle even when unloaded, as it does not negatively impact fuel consumption. Thanks to its design with removable side elements, the rear carrier system can be adapted, especially for narrow vehicles, to still transport bicycles, for example.

• 1 eine Ansicht eines Fahrzeugs mit einer beispielhaften Ausführungsform des erfindungsgemäßen aerodynamischen Heckträgersystems,
• 2 eine beispielhafte Ausgestaltung des Heckträgersystems im Detail,
• 3 eine Prinzipskizze eines Heckträgersystems in einer Draufsicht, und
• 4a, 4b die Rückansicht eines Wohnmobils mit zwei beispielhaften Ausführungen des Heckträgersystems.

The invention is explained below in exemplary embodiments with reference to the accompanying drawings. They show:

• 1 a view of a vehicle with an exemplary embodiment of the aerodynamic rear carrier system according to the invention,
• 2 an exemplary design of the rear carrier system in detail,
• 3 a schematic diagram of a rear carrier system in a plan view, and
• 4a , 4b the rear view of a motorhome with two example versions of the rear carrier system.

In 1 a vehicle 50 is shown in a side view, in which an exemplary configuration of the rear carrier system 10 according to the invention is detachably mounted. The details are described with reference to 2 explained. For comparison purposes, however, the substructure 12 and the transport box 22 provided therein are marked, on which a piece of luggage 23 is also placed.

2 The rear carrier system 10 is now taken up in detail. It consists of a roof element 14, a substructure 12, and two side elements 16.

The roof element 14 is suspended from the upper edge of the tailgate 52 of the vehicle 50 by padded supports 18 and is also supported on its sides by two supports 24, at the ends of which suction cups are provided for securing it to the rear window. Alternatively, two supports 24 could be provided, which engage laterally behind the tailgate 52 in the area shown and secure the support 24. To stabilize the roof element 14, metal inserts 26 are installed in the roof element 14.

The roof element 14 can be rotated upwards around an axis in the y-direction. This is made possible by an articulated mounting 15 of the roof element 14 on the supports 18. This mounting 15 also has notches so that the roof element 14 can rotate upwards in stages and be held in various positions. This also makes it possible to leave the roof element 14 slightly rotated upwards in order to transport a larger piece of luggage or bicycle that would otherwise be too high. Basically, however, the upward rotation of the roof element 14 serves to improve accessibility when loading and unloading the rear carrier system 10 and accessing the tailgate 52.

The substructure 12 is mounted on a trailer coupling 54 (cf. 3 ) and fixed. The substructure 12 has a bicycle carrier 20 on which two bicycles 56 and their detached front wheels 56a are arranged. The saddles of the bicycles 56 are lowered or removed so that the bicycles 56 fit into the rear carrier system 10.

Textile side elements 16 are stretched between the roof element 14 and the substructure 12 on both sides of the rear carrier system 10 and are secured with hook-and-loop fasteners 46. The textile side elements 16 are made of a PVC-coated fabric ("truck tarpaulin").

The outer shape of the rear carrier system 10, formed by the roof element 14, the substructure 12, and the side elements 16, continues the lines of the vehicle 50, for example, the position and orientation of edges and surfaces. It thus picks up on and incorporates the aerodynamic design of the vehicle 50, so that the rear carrier system 10 itself has a positive aerodynamic effect on the loaded vehicle 50.

In order to close the gap between the side elements 16 and the vehicle 50, front connecting strips 28 are provided, which are 2 are already adapted to the shape of the vehicle 50. The rear end is formed by the vertical end strips 30, to which the rear flexible cover 34 can also be attached. This is also made of the aforementioned textile material and closes off the rear carrier system 10 to the rear. Optionally, the attachment of the rear cover 34 can be secured with a lock 48.

Since the rear carrier system 10 conceals the rear lights of the vehicle 50, the license plate, as well as the camera and sensors for the parking aid of the vehicle 50, a holder 38 for a repeat license plate, as well as a rear light 36, as well as a camera 40 and a sensor 42 for the parking aid are arranged on the rear of the substructure 12 and are communicatively connected to the vehicle 50 via cables. For the third brake light 44 of the vehicle 50, a recess in the roof element 14 can be provided, taking into account the required beam angle, or a separate additional third brake light 44 can be arranged on the roof element 14 (not shown).

As already seen, the rear carrier system 10 is installed by attaching the substructure 12 and roof element 14, and then attaching the side elements 16 and the rear cover 34. Disassembly is carried out in the reverse order.

If a vehicle user wishes to open his tailgate 52, he loosens the fastenings of the side elements 16, folds the roof element 14 upwards and, if the substructure with its engagement with the vehicle's own support system 54 is designed accordingly, the substructure 12 downwards or to the side so that the tailgate 52 can be opened.

3 shows a top view of the rear of a vehicle 50 with a rear carrier system 10. As can be seen here, the transported bicycles 56 are wider than the vehicle 50. Therefore, the side elements 16 can be removed, leaving the rest of the rear carrier system 10 on the vehicle and used. To adapt the substructure 12 and the roof element 14 to the narrow vehicle 50, they are each formed with three parts that can be moved relative to each other in the y-direction, so that their width can be adjusted and fixed.

In the 4a and 4b It is shown how the rear carrier system 10 according to the invention can be attached to a motor home 50. The structure of the rear carrier system 10 is similar to that of a passenger car as in the previous figures, therefore only the differences are highlighted. The embodiment shown assumes that the motorhome's tailgate opens upwards.

In 4a The rear carrier system 10 occupies the entire rear of the motorhome 50. The roof element 14 is shaped and attached in such a way that the visibility of the third brake light 44 is not impaired. In addition, the roof element 14 is shaped such that it extends downwards at the sides to provide the connection area for the side elements 16. This can result in an aerodynamic optimization and also better accessibility for the vehicle user to attach the side elements 16. Bicycles 56 or other luggage can be easily transported in the rear carrier system 10. However, since it can obscure the license plate of the motorhome 50, a holder 38 for a repeat license plate is provided on the substructure 12, as well as a rear light 36.

In 4b The rear carrier system 10 is designed with a lower height and is oriented toward the upper edge of the motorhome 50. This allows the vehicle's own rear light to remain visible. Below this, a rear drawer (not marked) is shown, independent of the rear carrier system 10, which a vehicle user can optionally use to transport additional luggage or the like.

List of reference symbols

10

Rear carrier system

12

Substructure

14

roof element

15

rotatable bearing

16

Page element

18

carrier

20

bike rack

22

Transport box

23

piece of luggage

24

Support

26

metallic insert

28

front terminal block

30

vertical finishing strip

32

additional transport box

34

flexible cover

36

rear light

38

Holder for repeat license plates

40

camera

42

Sensors for parking assistance

44

third brake light

46

Velcro fastener

48

Lock

50

vehicle

52

tailgate

54

Vehicle support system

56

Bicycle

56a

Front wheel of the bicycle

Claims (13)

Rear carrier system (10) for a vehicle (50) with a substructure (12), a roof element (14) and two side elements (16), each of which is detachably connected to the substructure (12) and the roof element (14), wherein • the rear carrier system (10) is detachably connected to the vehicle (50), • the rear carrier system (10) has an aerodynamic shape, and • the substructure (12) is to be arranged on a vehicle-specific support system (54), characterized in that • the roof element is pivotable about a y-axis, and • the roof element (14) is to be suspended from an edge of the tailgate (52) of the vehicle (50) by means of padded supports (18), Rear carrier system (10) according to Claim 1 , characterized in that the substructure (12) comprises a bicycle carrier (20), a bicycle carrier (20) with a transport box (22) or a transport box (22), in particular an extendable transport box (22) or a transport box (22) that can be folded to the side. Rear carrier system (10) according to Claim 1 or 2 , characterized in that the roof element (14) has at least one support (24) on the rear window of the vehicle (50) or on a frame of the tailgate (52) of the vehicle (50). Rear carrier system (10) according to one of the preceding claims, characterized in that the side elements (16) are designed as textile side elements which are to be fastened to the substructure and to the roof element (14) in particular by means of Velcro fasteners, eyelets, hooks, magnets or toggles. Rear carrier system (10) according to one of the preceding claims, characterized in that on the side elements (16) on their a front connecting strip (28) is arranged or formed on each edge facing the vehicle (50). Rear carrier system (10) according to one of the preceding claims, characterized in that a vertical end strip (30) is arranged or formed on the side elements (16) on their edge facing away from the vehicle (50). Rear carrier system (10) according to one of the preceding claims, characterized in that the roof element (14) and/or the substructure (12) is adjustable in its width. Rear carrier system (10) according to one of the preceding claims, characterized in that the roof element (14) is designed as a further transport box (32). Rear carrier system (10) according to one of the preceding claims, characterized in that the rear side can be closed by means of a flexible cover (34). Rear carrier system (10) according to one of the preceding claims, characterized in that at least one rear light (36), a third brake light (44), a sensor system (42) for a parking aid, at least one camera (40) and/or a holder (38) for a repeat license plate is arranged on the rear side. Rear carrier system (10) according to one of the preceding claims, characterized in that it is provided as a retrofit system in which a user-owned bicycle carrier (20) and/or a user-owned transport box (22) acts as a substructure (12). Rear carrier system (10) according to one of the preceding claims, characterized in that the roof element (14) is divisible. Vehicle (50) with an aerodynamic rear carrier system (10) according to one of the preceding claims.