Wind generator system for a vehicle trailer, vehicle trailer and method for operating the same

Abstract

The present invention relates to a wind generator system 1 for a vehicle trailer 100, a vehicle trailer 100, and a method 1000 for operating the same. The wind generator system comprises at least one rotor 10 and at least one generator 20, wherein the rotor 10 is at least partially arranged in a housing 30. The housing has a closable opening 32, which is configured to receive an air flow 60 and direct it to an upstream side 12 of the rotor 10. Furthermore, the wind generator system comprises a control device 40, which is configured to at least partially open or keep open the closable opening 32 when a power supply 210 of a towing vehicle 200 for the vehicle trailer 100 is interrupted or is to be interrupted.

Description

Field of the invention

[0001] The invention relates to a wind generator system for a vehicle trailer, a vehicle trailer and methods for operating the same. background

[0002] Today's towing vehicles must meet various emissions standards, such as the European EURO6 standard. It has been discovered that these towing vehicles automatically shut off the power supply to a trailer. This shutdown occurs even though the trailer requires electrical power and can lead to malfunctions in the trailer's electrical components, such as an electronic trailer stability system or a refrigerator.

[0003] Various systems are known for supplying vehicle trailers, such as camping trailers, with independent energy. For example, vehicle trailers that include a battery storage unit are known. When electrical energy is needed, it can be drawn from the battery storage unit. However, this requires that the battery storage unit is charged and sufficiently large.

[0004] It's also known to supply the trailer with power via a generator, such as a wind turbine. However, these systems are usually only usable when stationary and / or result in high, undesirable wind resistance. Summary

[0005] In light of the above, the object of the invention is to ensure a safe and permanent supply of electrical energy to a vehicle trailer.

[0006] The object is achieved by a wind generator system for a vehicle trailer according to claim 1, by a vehicle trailer according to claim 11, and by a method according to claim 15. Further aspects of the invention are specified in the subclaims and in the following description.

[0007] In particular, the object is achieved by a wind generator system for a vehicle trailer. The wind generator system comprises at least one rotor and at least one generator. The rotor is configured to be set into a rotational movement by an air flow. The generator is configured to convert the rotational movement of the at least one rotor into electrical energy. The air flow that the wind generator system uses to generate electrical energy is caused in particular by a driving movement of the vehicle trailer (headwind). Likewise, natural wind (in particular headwind and / or crosswind) can be converted into electrical energy - provided the rotor is appropriately oriented.

[0008] The rotor is at least partially arranged in a housing. If multiple rotors (at least two, or at least three, or at least four, or at least five, or at least six, or at least seven, or at least eight) are provided, each rotor can be arranged in its own housing or housing section. It is also possible for multiple rotors to be arranged in one housing.

[0009] The housing has at least one closable opening. If multiple rotors are provided, a separate closable opening can be assigned to each rotor, and / or a common closable opening can be assigned to multiple rotors.

[0010] The closable opening is designed to capture the airflow and direct it to the upstream side of the rotor. The airflow reaches the rotor via the closable opening, provided it is at least partially open. If the closable opening is closed, no airflow reaches the rotor, and no electrical energy is generated.

[0011] The wind generator system further comprises a control device. This control device is configured to at least partially open and / or keep the closable opening open when a power supply from a towing vehicle to the vehicle trailer is interrupted or is to be interrupted.

[0012] The control device can include sensors to detect whether a power supply from the towing vehicle to the vehicle trailer has been interrupted. For example, a voltage and / or current supplied by the towing vehicle to the vehicle trailer can be measured. If the voltage / current drops below a threshold or if no voltage / current can be measured, the control device can issue a command that causes the at least one closable opening to be opened (or kept open if already open) so that the wind generator system can generate electrical energy to supply the vehicle trailer.

[0013] Furthermore, the control device can be configured to receive data from the towing vehicle and / or to communicate with the towing vehicle via a data connection (wired or wireless). The data connection can be used to notify the control device that the power supply has already been interrupted or will (shortly) be interrupted. In response to such a notification, the control device can issue a command that causes the at least one closable opening to be opened (or kept open if already open) so that the wind generator system can generate electrical energy to supply the vehicle trailer.

[0014] Thus, the wind generator system allows the vehicle trailer to provide electrical energy when it is not supplied by the towing vehicle, thus preventing malfunctions of electrical components of the vehicle trailer, such as an electronic trailer stabilization system or a refrigerator.

[0015] If no electrical energy is to be generated by the wind generator system (for example, because the power supply is being taken over by the towing vehicle, or because the trailer does not currently require any electrical power), the control unit can issue a command to close the lockable opening or to remain closed. When the lockable opening is closed, the trailer's air resistance is reduced, thus saving energy (and especially fuel).

[0016] Furthermore, the control device can be configured to at least partially open the closable opening when the towing vehicle is decelerating, recuperating kinetic energy, or could recuperate it. This makes it possible to use excess kinetic energy to generate electrical energy using the wind generator system. If at least one closable opening is open when the towing vehicle is decelerating, recuperating kinetic energy, or could recuperate it, energy can be saved or recovered via the wind generator system. Thus, the efficiency of the vehicle combination (i.e., towing vehicle and trailer) can be further increased.

[0017] To detect whether the vehicle is decelerating, the control device can include an acceleration sensor. If this detects this, the control device can issue a command to close the lockable opening or to remain closed. To detect whether the vehicle could recuperate energy, the control device can use the acceleration sensor and / or include a sensor that detects a tilt of the vehicle's trailer. If it is detected that the vehicle's trailer is tilting forward, it can be concluded that the vehicle is traveling downhill, which would in principle allow recuperation. In this case, the control device can issue a command to close the lockable opening or to remain closed.

[0018] Furthermore, the control unit can be informed via the data connection whether the towing vehicle is decelerating, recuperating kinetic energy, or could recuperate. In response to such a notification, the control unit can issue a command so that the lockable opening is closed or remains closed.

[0019] The wind generator system may further comprise a charging device and optionally a battery. The charging device is electrically connected to the at least one generator. The charging device can convert the electrical energy generated by the generator (e.g., from AC to DC) and / or direct it to a storage device, such as a battery. Thus, the generated electrical energy can be stored for later use. The storage device can be part of the wind generator system, the vehicle trailer, and / or the towing vehicle.

[0020] Furthermore, the control device can be configured to open and / or close the closable opening depending on the charge level of the storage device. For example, if the charge level is very low (e.g., < 20%, < 10%, or < 5%), the closable opening can be opened.

[0021] However, if the storage device is fully charged (or at least 80%, or at least 90%, or at least 95%), the lockable opening can be closed. This is especially true if it is also determined that the vehicle trailer does not require electrical power at that time.

[0022] The at least one rotor can have a substantially vertical axis of rotation. For example, the rotor can be a Darrieus rotor or a Savonius rotor. A vertical axis of rotation enables the generation of electrical energy independent of the direction of the incoming airflow. This allows crosswinds to be utilized in addition to the airstream.

[0023] In another aspect, the at least one rotor has a substantially horizontal axis of rotation. The axis of rotation can point in the direction of travel of the vehicle trailer or be oriented transversely to the direction of travel when the wind generator system is properly mounted on a vehicle trailer.

[0024] In particular, the rotor can have adjustable rotor blades to adapt to different wind or travel speeds and thus optimize performance. For this purpose, the control device can be configured to detect the travel speed and / or receive a corresponding travel speed from the towing vehicle in order to optimize the position of the rotor blades accordingly.

[0025] Furthermore, the at least one rotor can have a diameter in the range of 5 cm to 50 cm, or in the range of 10 cm to 40 cm, or in the range of 25 cm to 35 cm.

[0026] In a further aspect, the wind generator system comprises at least one first air guiding structure. This can, for example, comprise an air duct. The first air guiding structure is configured to direct the air flow from the closable opening to the rotor (or rotors). This makes it possible to provide the closable opening at a distance from the rotor and / or in a different orientation than the rotor. For example, the closable opening can be arranged on the side of the vehicle trailer, in the area of the underbody, or in a roof area, while the rotor(s) are arranged at a different location. Furthermore, it is possible to assign several closable openings to a rotor via appropriate air guiding structures, so that the rotor is or can be supplied with different air flows.

[0027] The air guide structure can be shaped so that the air flow is accelerated towards the rotor (in this case, for example, the air guide structure tapers).

[0028] In a further aspect, the wind generator system comprises at least one second air guide structure (e.g., an air duct). The second air guide structure is arranged downstream of the rotor. The second air guide structure serves to direct the air flow away from the rotor. This can prevent disruptive turbulence and further increase efficiency. Optionally, the second air guide structure is configured to direct the air flow toward at least one wheel brake of the vehicle trailer. This allows the wheel brake to be cooled.

[0029] To open or close the lockable opening, the housing can be mounted on a movable base. This allows the housing to be extended or folded out when the opening needs to be opened.

[0030] In another aspect, at least one closing element is assigned to the closable opening. The closing element can be moved from a first position to a second position. If the closing element is in the first position, the closable opening is open. If the closing element is in the second position, the closable opening is closed. Furthermore, the at least one closing element can be moved rotationally and / or translationally from the first to the second position.

[0031] In one aspect, the closing element is a flap that is pivotably mounted on the closable opening. In another aspect, the closing element is a slider that is arranged on the closable opening for translational movement. Furthermore, the closing element can comprise an air guide louver or be designed as an air guide louver. A plurality of air guide louvers can be assigned to the closable opening, with the opening being open or closed depending on the (rotational position) of the air guide louvers.

[0032] In a further aspect, the closing element comprises a substantially air-impermeable material web (e.g., a (fabric) tarpaulin) or interconnected slats. The material web / slats can be guided in a guide so that they can be moved substantially translationally to open and / or close the closable opening.

[0033] In a further aspect, the at least one closing element can be moved from the second to the first position due to gravity and / or by means of an elastic element (for example a spring). The closing element can, for example, be held in the second position (closed position) by means of a holding element. The holding element can, for example, be magnetic (for example an electromagnet) and / or mechanical (for example a locking element such as a pin or a hook). If the holding element is released, the closing element is moved into the first position (open position) due to gravity or due to a preload. This allows for very rapid opening. Furthermore, opening is also possible when no or only little electrical energy is available.

[0034] If the holding element is an electromagnet, for example, if the power supply is interrupted, the electromagnet can no longer be supplied with power and the lockable opening is opened.

[0035] Furthermore, a drive, in particular an electric drive, can be assigned to the at least one locking element. This drive can be configured to move the at least one locking element from the first position to the second position and / or from the second position to the first position. For this purpose, the drive can be controlled directly or indirectly by the control device.

[0036] The object is further achieved by a vehicle trailer, in particular by a camping trailer. The vehicle trailer comprises a wind generator system as described above, as well as a chassis and, optionally, a body. The wind generator system is arranged on the chassis and / or the body. This allows the advantages described above to be achieved. In particular, the vehicle trailer can be supplied with electrical energy even while driving, if the towing vehicle interrupts the power supply to the vehicle trailer.

[0037] The at least one closable opening can point in the forward direction of travel of the vehicle trailer or in a direction perpendicular to the forward direction of travel of the vehicle trailer. Thus, airflow, in particular, can be used to generate electrical energy.

[0038] In a further aspect, the at least one closable opening is arranged in the region of a vehicle trailer underbody. The vehicle trailer underbody can, in particular, be lined, wherein the housing and / or the first air guiding structure and / or the second air guiding structure can be designed integrally with a vehicle trailer underbody cladding.

[0039] In a further aspect, the at least one closable opening is arranged laterally on the chassis or laterally on the body. In this case, an open closing element (e.g., a flap) can be oriented in the first position such that an airflow (in particular, airstream) is directed into the closable opening.

[0040] In a further aspect, the at least one closable opening is arranged in a roof area of the vehicle trailer. This is particularly advantageous for high bodies, since the closable opening can be exposed to airflow from the preceding towing vehicle without interference.

[0041] The vehicle trailer may further include a solar cell and / or a wheel-driven generator, wherein the solar cell and / or the wheel-driven generator are electrically connected to the wind generator system. Thus, the vehicle trailer has multiple energy supply options available.

[0042] The object is further achieved by a method for operating a wind generator system for a vehicle trailer as described above. The method comprises the following: - Detecting whether the power supply of a towing vehicle for a trailer is interrupted or should be interrupted. This can be done via at least one sensor and / or via a data connection. - at least partially opening or keeping open the closable opening of the wind generator system when it has been detected that the power supply is interrupted or is to be interrupted in order to supply an air flow to at least one rotor.

[0043] Furthermore, the method may optionally include detecting whether the towing vehicle or trailer is decelerating, or whether the towing vehicle is recuperating or could recuperate kinetic energy. If it is detected that the towing vehicle or trailer is decelerating, or if it is detected that the towing vehicle is recuperating or could recuperate kinetic energy, the method may include at least partially opening or keeping open the closable opening of the wind generator system. Short description of the characters

[0044] The invention is explained in more detail below with reference to the accompanying figures. They show: Fig. 1 a schematic representation of a wind generator system on a towed vehicle trailer; Fig. 2A is a perspective view of a first vehicle trailer; Fig. 2B a side view of the first vehicle trailer; Fig. 2C a front view of the first vehicle trailer; Fig. 3A is a side view of a second vehicle trailer; Fig. 3B a detailed view of the second vehicle trailer; Fig. 4 a bottom view of a third vehicle trailer; Fig. 5A is a bottom view of a fourth vehicle trailer; Fig. 5B another bottom view of the fourth vehicle trailer, and Fig. 6 a schematic flow diagram of a method for operating a wind generator system. Description of the characters

[0045] Fig. 1 shows a schematic representation of a wind generator system 1 on a towed vehicle trailer 100. The vehicle trailer 100 is coupled to a towing vehicle 200. The towing vehicle 200 can supply the vehicle trailer 100 with electrical energy via a power supply 210. Furthermore, the towing vehicle 200 is authorized to interrupt the power supply 210. Furthermore, a data connection 220 can be provided, via which the towing vehicle 200 can communicate with the vehicle trailer 100 and / or a control device 40 of the wind generator system 1.

[0046] The data connection 220 can be wired or wireless. Likewise, the data connection 220 can be unidirectional or bidirectional.

[0047] The vehicle trailer 100 comprises a chassis 110. At least two wheels 130 are arranged on the chassis, wherein each wheel can be assigned a wheel brake 132.

[0048] The chassis 110 supports a body 120. A camping body is shown here as an example. Other bodies, such as those for transporting horses, refrigerating transported goods, especially food, and / or the like, are also possible.

[0049] The wind generator system 1 comprises a rotor 10 and at least one generator 20 associated with the rotor 10. The generator 20 is driven by the rotor 10. Thus, it is possible to utilize an air flow 60 to generate electrical energy.

[0050] The rotor 10 is arranged here in a housing 30. The housing is arranged in the area of a vehicle trailer underbody 112 and can, in particular, be part of an underbody panel of the vehicle trailer 100. In another embodiment, the housing can be arranged in the roof area 122.

[0051] The housing 30 comprises at least one closable opening 32. This opening is open in the forward direction of travel A of the vehicle trailer 100, receives the air flow 60, and directs the air flow 60 to the rotor 10. The closable opening 32 can be closed or opened by means of a closing element 34, here a pivoting flap. Fig. The open position is shown in Figure 1. The closing element 34 can be opened, for example, by the action of gravity. Additionally, an elastic element (e.g., a spring) can urge the closing element 34 into the open position.

[0052] Furthermore, a drive (not shown) can be assigned to the closing element 34 in order to open and / or close the opening 32.

[0053] The wind generator system 1 further comprises a control device 40. The control device 40 is configured to at least partially open and / or keep open the closable opening 32, inter alia when the power supply 210 of the towing vehicle 200 for the vehicle trailer 100 is interrupted or is to be interrupted.

[0054] Furthermore, the wind generator system 1 may comprise a charging device 52 (e.g. comprising an inverter) and optionally a battery 50, wherein the charging device 52 is electrically connected to the at least one generator 20

[0055] The Fig. 2A to 2C show a first vehicle trailer 100a. In this case, the housing 30a is arranged in a roof area 122. The closable opening 32a can be closed by means of a closing element 34a (see Fig. 2A, Fig. 2B) and opened (see Fig. 2C). The closing element 34a can, as in Fig. 2B, indicated by the curved arrow, can be displaced relative to the housing. Five rotors 10a are arranged side by side in the housing 30a. The arrangement and number of rotors is only exemplary. Each rotor 10a is assigned a generator 20a, which converts the rotational movement of the respective rotor into electrical energy.

[0056] The Fig. 3A and Fig. 3B show a second vehicle trailer 100b. In this case, the housing 30b is arranged in the area of the underbody 112, i.e., essentially on the underside of the vehicle trailer 100b. The closable opening 32b can be closed by means of a closing element 34, for example in the form of a flap (not shown, but similar to Fig. 1) be closed and opened. How Fig. Figure 3B shows four rotors 10b arranged side by side in the housing 30b. The arrangement and number of rotors is only an example. Each rotor 10b is assigned a generator 20b, which converts the rotational movement of the respective rotor into electrical energy.

[0057] Fig. Figure 4 shows a bottom view of a third vehicle trailer 100c. This is a modification of the second vehicle trailer 100b, which is shown in the Fig. 3A and Fig. 3B. In this embodiment, four closable openings 32c are arranged laterally on the chassis 110. The closable openings 32c point in a direction oriented perpendicular to the forward direction of travel of the vehicle trailer 100c. Each closable opening is assigned a corresponding closing element 34c. The closing elements are provided here in the form of pivotable flaps. In the open position shown, the flaps 34c direct an air flow to the openings 32c.

[0058] In addition, four air ducts are provided, each of which functions as a first air guide structure 36. These air guide structures 36 direct an air flow from a closable opening to a corresponding rotor 10c. Here, four rotors 10c and correspondingly four generators 20c are provided in the housing 30c.

[0059] As in Fig. 4, an air duct connects a closable opening 32c with a rotor 10c.

[0060] In the Fig. 5A and Fig. In the embodiment of a fourth vehicle trailer 100d shown in FIG. 5B, the housing 30d is also arranged in the region of the underbody 112, i.e., essentially on the underside of the vehicle trailer 100d. In particular, the housing 30d is integrally formed with an underbody panel 114 of the vehicle trailer 100d.

[0061] In Fig. 5A, the closable openings 32d (here two adjacent openings facing in the forward direction of travel) are in an open state and in Fig. 5B in a closed state. To open and close the openings 32d, a common closing element 34d is provided, which is slidably arranged on the underbody. The closing element 34d can comprise a tarpaulin, an elastic element, or interconnected slats.

[0062] To direct an air flow from the respective opening 32d to the rotors arranged in the housing 30d, first air guiding structures 36d are provided. Each opening 32d is assigned a first air guiding structure (here, an air guiding channel) (see Fig. 5B). Furthermore, second air guide structures 38 are provided here, which are arranged downstream of the rotors (not shown). These second air guide structures are also designed as air guide channels and direct the air flow from the rotors to the wheels 130 or to their wheel brakes 132, 134.

[0063] Fig. 6 shows a schematic flow diagram of a method 1000 for operating the wind generator system 1. The method comprises - Detecting 1100 whether a power supply 210 of a towing vehicle 200 for a vehicle trailer 100 is interrupted or should be interrupted, as well as the - at least partially opening 1300 or keeping open the closable opening 32 of the wind generator system 1 when it has been detected that the power supply 210 is interrupted or is to be interrupted in order to supply an air flow 60 to the at least one rotor 10.

[0064] Furthermore, the method 1000 may optionally include detecting 1200 whether the towing vehicle 200 or the vehicle trailer 100 is decelerating, or whether the towing vehicle 200 is recuperating or could recuperate kinetic energy. If it has been detected that the towing vehicle 200 or the vehicle trailer 100 is decelerating, or if it has been detected that the towing vehicle 200 is recuperating or could recuperate kinetic energy, the method 1000 may include at least partially opening 1300 or keeping open the closable opening 32 of the wind generator system 1. List of reference symbols 1 wind generator system 10 Rotor 12 Inflow side 20 generators 30 housings 32 lockable opening 34 locking element 36 first air guidance structure 38 second air guidance structure 40 Control device 50 battery 52 Charging device 60 airflow 100 vehicle trailers 110 chassis 112 Vehicle trailer underbody 114 Underbody paneling 120 Structure 122 roof area 130 wheels 132 Wheel brake 134 Wheel brake 200 towing vehicle 210 Energy supply 220 data connection A Forward direction

Claims

[1] Wind generator system (1) for a vehicle trailer (100), the wind generator system comprising at least one rotor (10) and at least one generator (20), wherein the rotor (10) is designed to be set into a rotational movement by an air flow (60), and wherein the generator (20) is designed to convert the rotational movement of the at least one rotor (10) into electrical energy, wherein the rotor (10) is at least partially arranged in a housing (30), and wherein the housing (30) has at least one closable opening (32), which closable opening (32) is designed to receive the air flow (60) and to guide it to an inflow side (12) of the rotor (10), wherein the wind generator system (1) further comprises a control device (40), wherein the control device (40) is configured to at least partially open and / or keep open the closable opening (32) when a power supply (210) of a towing vehicle (200) for the vehicle trailer (100) is interrupted or is to be interrupted. [2] The wind generator system (1) according to claim 1, wherein the control device (40) is further configured to at least partially open the closable opening (32) when the towing vehicle (200) decelerates, recuperates or could recuperate kinetic energy. [3] The wind generator system (1) according to claim 1 or 2, wherein the wind generator system (1) further comprises a charging device (52) and optionally a battery (50), and wherein the charging device (52) is electrically connected to the at least one generator (20). [4] The wind generator system (1) according to one of the preceding claims, wherein the at least one rotor (10) has a substantially vertical axis of rotation, or wherein the at least one rotor (10) has a substantially horizontal axis of rotation, which can be arranged in or transversely to a direction of travel of the vehicle trailer (100). [5] The wind generator system (1) according to one of claims 1 to 4, wherein the at least one rotor (10) has a diameter in the range of 5 cm to 50 cm, or in the range of 10 cm to 40 cm, or in the range of 25 cm to 35 cm. [6] The wind generator system (1) according to one of the preceding claims, further comprising at least one first air guiding structure (36), wherein the first air guiding structure (36) is configured to guide the air flow (60) from the closable opening (32) to the rotor (10), wherein the first air guiding structure (36) is optionally an air guiding duct. [7] The wind generator system (1) according to one of the preceding claims, further comprising at least one second air guiding structure (38), wherein the second air guide structure (38) is arranged downstream of the rotor (10), and optionally is designed to direct the air flow (60) in the direction of at least one wheel brake (132, 134) of the vehicle trailer (100). [8] The wind generator system (1) according to one of the preceding claims, wherein the closable opening (32) is assigned at least one closing element (34) which can be transferred from a first position to a second position, wherein the closable opening (32) is open in the first position and closed in the second position, and wherein the at least one closing element (34) can be transferred rotationally and / or translationally from the first to the second position. [9] The wind generator system (1) according to claim 8, wherein the at least one closing element (34) can be transferred from the second to the first position due to gravity and / or by means of an elastic element. [10] The wind generator system (1) according to claim 8 or 9, wherein the at least one closing element (34) is assigned a drive, in particular an electric drive, in order to transfer the at least one closing element (34) from the first position to the second position and / or from the second position to the first position. [11] Vehicle trailer (100), in particular a camping trailer, wherein the vehicle trailer (100) a wind generator system (1) according to one of claims 1 to 10; a chassis (110), and optionally comprises a structure (120), and wherein the wind generator system (1) is arranged on the chassis (110) and / or on the structure (120). [12] Vehicle trailer (100) according to claim 11, wherein the at least one closable opening (32) points in the forward direction of travel (A) of the vehicle trailer (100), or in a direction perpendicular to the forward direction of travel of the vehicle trailer (100). [13] Vehicle trailer (100) according to claim 11 or 12, wherein the at least one closable opening (32) in the area of a vehicle trailer underbody (112), or on the side of the chassis (110), or on the side of the body (120), or is arranged in a roof area (122) of the vehicle trailer (100). [14] Vehicle trailer (100) according to one of claims 11 to 13, further comprising a solar cell and / or a wheel-driven generator, wherein the solar cell and / or the wheel-driven generator are electrically connected to the wind generator system (1). [15] A method (1000) for operating a wind generator system (1) for a vehicle trailer (100) according to any one of claims 1 to 10, the method comprising: Detecting (1100) whether a power supply (210) of a towing vehicle (200) for a vehicle trailer (100) is interrupted or is to be interrupted, and at least partially opening (1300) or keeping open the closable opening (32) of the wind generator system (1) when it has been detected that the power supply is interrupted or is to be interrupted in order to supply an air flow (60) to the at least one rotor (10), wherein the method optionally further comprises Detecting (1200) whether the towing vehicle (200) or the vehicle trailer (100) is decelerating, or detecting whether the towing vehicle is recuperating or could recuperate kinetic energy, and further optionally at least partially opening or keeping open the closable opening (32) of the wind generator system (1) when it has been detected that the towing vehicle (200) or the vehicle trailer (100) is decelerating, or when it has been detected that the towing vehicle is recuperating or could recuperate kinetic energy.

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