Wind deflector system for a convertible vehicle and convertible vehicle

Abstract

The invention relates to a wind deflector system (10) for a convertible vehicle (100) having at least two rows of seats (110, 111), with at least one air duct (20), wherein the air duct (20) comprises at least one first air inlet (21), a second air inlet (22) and an air outlet (23), wherein the air inlets (21, 22) are designed such that an inlet airflow (EL) can be drawn in by means of at least one blower (30) and guided through the air duct (20), wherein the outlet (23) is arranged between the first air inlet (21) and the second air inlet (22) and is designed such that an outlet airflow (AL) can be conveyed from the air outlet (23), wherein a wind deflector can be generated by the outlet airflow (AL).

Description

[0001] The invention relates to a wind deflector system with the features of independent claim 1, a convertible vehicle with the features of independent claim 9, and a method for controlling a wind deflector system with the features of independent claim 12.

[0002] Wind deflector systems, especially in double-row convertibles, primarily serve to reduce air turbulence in the interior when the top is down. This significantly increases passenger comfort by minimizing disruptive air currents and noise. In a convertible with the roof open, the wind flows directly into the passenger compartment, resulting in various aerodynamic effects. One of the most significant and bothersome effects for the occupants is air turbulence. This turbulence arises from the complex interactions of the wind with the vehicle body and the open structure of the car.

[0003] To reduce these effects, wind deflectors are used. These are partitions behind the seats of an open vehicle that deflect the air turbulence created behind the windshield and flowing into the vehicle, keeping it away from the occupants. The principle of a wind deflector is therefore to redirect the airflow. Wind deflectors consist of a frame covered with a mesh fabric, or made of glass or acrylic glass.

[0004] Wind deflectors for convertibles are often multi-part and consist of a vertical wind deflector positioned behind the front seats – or, in vehicles with rear seats, a horizontal one – as well as a mesh-covered frame, panel, or tarpaulin mounted at the bottom. This lower part of the wind deflector prevents downward air currents from flowing forward between or beside the seats. A rear-seat wind deflector is typically mounted between the rear headrests.

[0005] Furthermore, other solutions are known from the prior art in which the airflow is actively redirected by means of a blower. DE 10 2020 101 563 A1 discloses a convertible vehicle with an air duct and a blower for actively extracting the airflow deflected by the windshield, thus reducing the suction effect of the airflow and the associated drafts. To extract an airflow that is deflected upwards by the windshield and directed over the passenger compartment to the rear area, at least one air duct is provided, which has at least one opening in the upper part of the rear area for air inflow and at least one opening in the lower part of the rear area for air exhaust. To minimize drafts when driving with the top down, a wind deflector is provided, preferably positioned between the roll bars behind the seats.

[0006] A disadvantage of this state of the art is that the blower is necessary in addition to the mechanical wind deflector to reduce drafts. Furthermore, the incoming air must be directed by the blower and ducts to the underside of the rear section in the area of ​​the two wheels. This necessitates a considerable amount of installation space and makes the design complex and therefore expensive.

[0007] It is therefore an object of the present invention to overcome at least one of the disadvantages described above, at least partially. In particular, it is an object of the invention to provide a compact wind deflector system that can reduce drafts.

[0008] The foregoing problem is solved by a wind deflector system with the features of independent claim 1, as well as by a convertible with the features of independent claim 9 and the method with the features of independent claim 12.

[0009] Further features and details of the invention will become apparent from the dependent claims, the description, and the drawings. Features and details described in connection with the wind deflector system according to the invention naturally also apply in connection with the convertible and method according to the invention, and vice versa, so that the disclosure of the individual aspects of the invention always refers, or can refer, to each other.

[0010] According to the invention, a wind deflector system for a convertible with at least one row of seats is provided, comprising at least one air duct, wherein the air duct includes at least a first air inlet, a second air inlet, and an air outlet, wherein the air inlets are designed such that an inlet airflow can be drawn in by means of at least one blower and guided through the air duct, wherein the outlet is arranged between the first air inlet and the second air inlet and is designed such that an outlet airflow can be conveyed from the outlet, and a (fluidic) wind deflector can be generated by the outlet airflow. This system is designed to generate a wind deflector effect by directing an airflow through the air duct and releasing it from the outlet.

[0011] The claimed wind deflector system for a convertible with at least one row of seats is a system for controlling airflow to increase occupant comfort by minimizing turbulence and unwanted air eddies in the vehicle interior. The wind deflector system comprises at least one air duct that performs various functions to control the airflow within the convertible. The air duct is the element through which the air flows to prevent disruptive turbulence inside the vehicle. It has at least two inlets and at least one outlet, enabling targeted control of the airflow.

[0012] The system is equipped with two air inlets: a first air inlet and a second air inlet. These inlets are positioned to draw air from different areas of the vehicle. The air inlets are preferably located on the sides of the vehicle. They are designed to draw air from the side of the convertible. This placement allows the wind deflector system to utilize the natural airflow along the sides of the vehicle. The first inlet is coupled to a blower that actively draws in air and directs it into the air duct. The second air inlet is strategically positioned to also draw air from the side of the vehicle, but from a different direction or from another side of the vehicle. The air outlet is preferably located in the center of the air duct, between the first and second air inlets.This central arrangement allows for effective airflow control, ensuring that the incoming airflow from both inlets is collected and combined before being directed through the outlet as the outgoing airflow. The air outlet is designed to precisely direct the outgoing airflow to create a wind deflector effect. It can be equipped with variable louvers or diffusers that homogenize the airflow and direct it as desired. The airflow from the outlet thus acts as a wind deflector. The airflow is directed from the outlet in such a way that it flows towards the headrests and any (potentially) open sunroof.

[0013] The air outlet is designed so that the combined airflow (outlet airflow) flows towards the rear of the vehicle at a specific speed and direction when the soft top is down. The airflow is directed rearward to meet the slower-moving air and the area of ​​high pressure (stagnation point), preventing the pressure difference that, among other things, causes air to flow back into the passenger compartment. This targeted control of the airflow from the outlet creates a wind deflector effect, eliminating the need for a conventional mesh wind deflector. This effect protects the occupants from disruptive wind noise and drafts by preventing backflow into the passenger compartment.

[0014] The wind deflector system functions by precisely directing the airflow through the air duct and its inlets and outlets. By drawing in air (inlet airflow) from the sides of the convertible and channeling it through the air duct, the outlet airflow is directed to minimize disruptive air turbulence in the interior. Air is drawn in from the side of the vehicle through the first air inlet, which is located on the side. A blower actively directs the airflow into the air duct. The blower generates the necessary pressure to propel the airflow through the air duct to the outlet.

[0015] The first and second air intakes serve to draw in air in order to enhance and / or stabilize the airflow. This dual air intake structure allows the system to vary the air pressure in the duct and optimize the flow.

[0016] The incoming airflow, guided through the air duct, exits through the air outlet as the outgoing airflow. The air outlet is located between the two air inlets, thus ensuring even air distribution.

[0017] The air outlet's design allows for a targeted airflow, minimizing the turbulence typically found in open-top vehicles. The outlet can also be equipped with movable flaps or louvers to precisely control the airflow and adapt it to specific conditions. Air is drawn in through the first and second air inlets by at least one blower. This blower actively directs the incoming airflow into the duct and releases it through the outlet as the exhaust airflow. The blower speed can be variably adjusted to adapt the airflow based on driving conditions, speed, and passenger comfort. The blower also maintains airflow at low speeds or when the vehicle is stationary, enhancing comfort in various driving situations.

[0018] By combining two air inlets and a precisely controlled air outlet, the wind deflector system optimally manages the airflow within the convertible's interior. This significantly reduces air turbulence and thus considerably increases passenger comfort. In addition to reducing turbulence, the system also contributes to a reduction in wind noise. The targeted airflow makes the vehicle's interior quieter, improving comfort, especially at higher speeds.

[0019] A fluidic wind deflector created in this way requires no physical structure, but works through targeted airflows. A controlled outflow of air is used to prevent air from flowing back into the vehicle interior due to pressure equalization and air turbulence. The generated airflows prevent the formation of a stagnation point behind the rear seat headrests and prevent air turbulence from being drawn back into the interior.

[0020] There is no mechanical structure that restricts the passengers' view or freedom of movement. The airflow can be adjusted to the driving conditions in real time, resulting in optimal reduction of air turbulence. The inventive (fluidic) wind deflectors function independently of seat occupancy and can achieve effective results even at varying driving speeds.

[0021] Within the scope of the invention, the term "interior" of a convertible vehicle is not to be understood as an enclosed space. Rather, the interior is to be understood as the area that, when the roof is closed, is bounded at the top by the roof itself and in which the occupants can sit. The interior of a convertible vehicle is thus defined as the entire area (passenger compartment) within the vehicle that is intended for the occupants or for storing objects. This does not include an enclosed trunk, frunk, or engine compartment.

[0022] Within the scope of the invention, the blower can be arranged between the first and second air inlets. This specific arrangement enables efficient airflow control through the air duct and maximizes the system's effectiveness. The blower is located within, i.e., along the air duct, between the first and second air inlets. This central position in the airflow allows air from both inlets to be efficiently drawn into the air duct. Because the blower is located between the two inlets, it can adjust the incoming airflow from both sources to the desired pressure and flow conditions before it is discharged through the air outlet.

[0023] The first air intake, preferably located on the side of the convertible, draws air from the vehicle's surroundings, particularly from the side airflow. The incoming airflow is then drawn through the blower, which is positioned between this first intake and the second intake in the air duct. Because the blower actively draws in the air, the volume and velocity of the incoming airflow can be precisely controlled. This allows the system to maintain a constant outgoing airflow even at low speeds or when the natural airflow along the sides of the vehicle is limited. This positioning offers the advantage of the blower acting as a central distribution unit between the two air intakes, ensuring that the air from both intakes is evenly distributed into the air duct. This prevents turbulence within the air duct and results in a smoother flow.The blower's primary function is to generate a controlled and consistent airflow through the air duct. Its placement between the two inlets allows it to draw in air from both inlets and deliver it into the duct.

[0024] Positioned between the air inlets, the blower acts not only as an air circulator but also as a flow stabilizer. It ensures that the air pressure in the air duct remains constant by drawing air from both the first and second air inlets. This uniform intake and distribution of air reduces turbulence within the air duct and ensures a stable and consistent airflow at the outlet. This automatic pressure adjustment helps maximize system efficiency and improve interior comfort. Because the blower is located between the two inlets, it can distribute the airflow evenly and minimize flow losses. A centrally positioned blower ensures that air is efficiently guided into the air duct without pressure drops or turbulence.A consistent airflow through the blower also reduces noise, as the system processes air in controlled quantities and with stable flow conditions. This helps to protect the vehicle's interior not only from turbulence but also from disruptive wind noise.

[0025] The blower can advantageously be designed as a radial fan. In the wind deflector system according to the invention, the blower is advantageously designed as a radial fan, which represents a special form of air conveyance and is characterized by high efficiency in generating radial airflows. A radial fan, also known as a centrifugal fan, uses an impeller with curved blades to move the air radially rather than axially. The air is drawn in radially and discharged axially through the outlet duct. This creates high static pressure and a strong airflow. The radial fan in the wind deflector system advantageously has an impeller with several curved blades. These blades are arranged so that the air is drawn in radially and discharged axially in a uniform manner. The positioning of the fan in the air duct between the two air inlets ensures that an incoming airflow is effectively drawn in from both sides of the vehicle.Each air intake (on one side of the vehicle, in the area of ​​the rear windows) directs air into the radial fan, which then efficiently directs the air axially through the air duct.

[0026] Air enters through the two laterally positioned inlets. The incoming airflow is drawn in by the rotation of the impeller and then forced axially outwards through the air outlet. This axial airflow generates a smooth and powerful outlet airflow, which helps reduce air turbulence inside the convertible. The combination of high flow rate and pressure build-up is ideal for directing the desired volume of air through the wind deflector system. The resulting outlet airflow thus acts as a (fluidic) wind deflector, eliminating the need for a separate mechanical / physical wind deflector.

[0027] Centrifugal fans are known for their high efficiency, especially in applications requiring high static pressure and precise airflow control. The lateral arrangement of the air inlets optimizes airflow, allowing the fan to propel air axially through the duct with minimal flow losses. Centrifugal fans generate higher static pressure than conventional axial fans, enabling them to better control airflow, even in the presence of duct obstructions. This ensures a consistent airflow, even at varying operating speeds. The centrifugal fan impeller is typically designed for high airflow capacity, with blades optimized for efficient air intake and axial discharge. This design minimizes turbulence and enhances airflow stability.

[0028] Radial fans are capable of moving large volumes of air with relatively little energy expenditure. This makes it possible to maintain airflow in the wind deflector system even at low driving speeds. Compared to other fan types, the radial fan generates a higher static pressure, which is particularly advantageous for controlling the airflow in the wind deflector system's ducts. The design of a radial fan also contributes to noise reduction, as the air is drawn in evenly and passed through without strong turbulence.

[0029] This efficient air distribution via the output airflow minimizes the formation of unwanted air turbulence in the vehicle's interior, significantly improving driving comfort for the occupants, especially in the second row of seats.

[0030] It is also conceivable that two radial fans are provided, arranged side by side. This arrangement offers particular advantages in terms of air distribution and system efficiency, especially regarding airflow control and turbulence reduction. The two radial fans are positioned parallel and side by side within the wind deflector system. This parallel arrangement allows for an even distribution of the incoming airflow from both sides of the vehicle into the air duct. Each fan draws in air through the respective side air inlets of the vehicle (in the area of ​​the rear windows) and directs it into the common air duct.

[0031] The side-by-side positioning ensures that the incoming airflow is distributed symmetrically and without significant disturbances. This improves the system's efficiency and ensures a uniform airflow from the air outlet. The two adjacent radial fans work synergistically to generate a constant, even outlet airflow. Both fans draw air from the respective sides of the vehicle and direct it into the air duct. This parallel operation results in an increased volume of air being conveyed through the system, thus achieving better control over the airflow.

[0032] The combined airflow of the two radial fans is particularly effective at higher driving speeds, as it ensures stable airflow inside the vehicle even under high external wind loads. The side-by-side positioning of the radial fans ensures that the incoming airflow is guided evenly and parallel through the system. This contributes to a symmetrical airflow distribution and prevents uneven flow within the air duct. Two radial fans offer a higher flow rate than a single fan. This allows more air to be fed into the system, resulting in improved control of the outgoing airflow. This increased performance reduces turbulence and ensures a stable outgoing airflow even at low speeds. Furthermore, the use of two radial fans, each delivering a specific volume of air, makes energy consumption more efficient.The fans can operate at lower speeds, which increases the system's energy efficiency while ensuring consistent airflow. Furthermore, the parallel operation of the two fans minimizes vibrations and resonances. The symmetrical arrangement and uniform airflow prevent unwanted vibrations in the vehicle.

[0033] Advantageously, the first radial fan can be fluidically connected to the first air intake, and the second radial fan to the second air intake. In the described wind deflector system, the two radial fans are fluidically connected to their respective air intakes, ensuring that air is drawn in efficiently and evenly from the sides of the vehicle and transported into the air duct. The fluidic connection between the two radial fans and their respective air intakes allows the incoming airflow to be efficiently directed into the air duct from both sides of the vehicle. The adjacent radial fans operate in parallel to distribute the outgoing airflow evenly, resulting in improved airflow and increased driving comfort in the convertible's interior.

[0034] The first radial fan is designed for the first air intake, which is preferably located on the first side of the vehicle in the area of ​​the rear window. This fluidic connection means that the airflow from the first air intake is directed straight into the first radial fan. The air intake is connected to the radial fan via a duct-like structure, allowing the air / intake airflow to be drawn in with minimal loss and in a controlled manner. The blades of the radial fan draw in the air radially and propel it axially into the air duct to expel it through the air outlet.

[0035] The second radial fan is fluidically connected to the second air intake, which is advantageously located on the opposite side of the vehicle. Here, too, there is a direct connection between the air intake and the radial fan to ensure an unobstructed airflow. The air drawn in through the second air intake enters the radial fan and is similarly conveyed axially into the air duct. This air duct structure, connecting the air intake and the fan, ensures that no significant flow losses occur and that maximum air delivery efficiency is achieved. Because the two radial fans are positioned side by side and each fluidically connected to its own air intake, they operate in parallel to draw in air from both sides of the vehicle. This separate intake ensures an even distribution of the airflow and prevents imbalances in the system.

[0036] The direct fluidic connection between the air inlets and the radial fans minimizes flow losses, as the air is transported directly from the air inlets to the fans and then into the air duct without detours or resistance. Thanks to this fluidic connection, each radial fan operates independently to draw air from its respective inlet, enabling precise control of the airflow. The parallel arrangement and fluidic connection allow the radial fan to optimally draw in and direct the incoming airflow, resulting in higher overall system performance. Both fans complement each other, ensuring a consistent and even outgoing airflow.

[0037] Within the scope of the invention, the air outlet can be fluidically connected to the first radial fan and the second radial fan. Advantageously, the air outlet is thus fluidically connected to both the first and the second radial fan, which enables efficient airflow. This fluidic connection ensures that the airflow drawn in by both fans is distributed in a targeted and central manner via the air outlet to reduce turbulence and improve driving comfort.

[0038] The air outlet is designed to collect the incoming airflows, which are driven by the two adjacent radial fans, and to distribute them evenly as an outlet airflow from the vehicle. The air outlet is directly connected fluidically to both the first and second radial fans via a duct system.

[0039] The incoming airflow generated by the first radial fan (connected to the first air intake on the front side of the vehicle) is directed through a specific channel to the air outlet. Similarly, the incoming airflow drawn in by the second radial fan (connected to the second air intake on the rear side of the vehicle) is guided through another channel to the same air outlet. The air outlet is designed so that the airflow from both fans merges in a common area. This fluidic connection ensures that the airflows from both radial fans are efficiently combined and directed through the air outlet.

[0040] The air outlet is centrally located between the two radial fans, ensuring that the incoming airflows from both sides of the vehicle are collected and evenly distributed. This design guarantees no airflow losses and minimizes resistance to the airflow. The fluidic connection between the air outlet and both radial fans ensures a uniform distribution of the output airflow. The combined output airflow from the first and second radial fans is directed centrally through the air outlet to the rear of the vehicle.

[0041] This uniform air distribution helps reduce turbulence in the interior. The airflow is directed from the radial fans to the air outlet without loss or resistance. This ensures maximum utilization of the fans' performance. Because the air outlet collects the air from both air inlets and fans and releases it centrally, local air turbulence is minimized.

[0042] It is also conceivable that the air outlet is located directly on the blower. In the advantageously designed wind deflector system, the air outlet is located directly on the blower – more precisely, on the two radial fans arranged side by side. This direct arrangement offers specific technical advantages for the efficiency of air delivery, the control of the airflow, and the reduction of turbulence in the convertible's interior. The air outlet is positioned directly and immediately on the two radial fans. This arrangement means that the air outlet is located directly behind or at the outlet side of the radial fans, so that the air drawn in and delivered by the fans is discharged directly into the rear of the vehicle.

[0043] The air outlet is located directly at the outlet opening of the two radial fans. This arrangement ensures that the incoming airflow, driven by the fans, can exit directly into the rear of the vehicle without detours or additional ducts. The air outlet is advantageously positioned so that it is mounted directly on the air outlet side of the fans, allowing the entire volume of air generated by the fans to be efficiently delivered to the rear. The close proximity of the air outlet to the radial fans minimizes the distance the air has to travel before reaching the rear of the vehicle. This reduces flow losses and increases the efficiency of the entire wind deflector system.

[0044] The radial fans are designed so that the incoming airflow is forced axially from the center of the fan to the rear. The direct placement of the air outlet at this point of exit allows for the direct channeling of the exhaust airflow. The air outlet itself is designed to distribute the airflow evenly and direct it at an optimal angle into the rear of the vehicle. This can be further enhanced, for example, by using louvers or diffusers in the air outlet, which homogenize the airflow and can direct it in specific directions.

[0045] By positioning the air outlet directly adjacent to the radial fans, the air path from the blower to the rear of the vehicle is significantly shortened. This reduces flow losses that could arise from friction and turbulence in long ducts. The direct connection also prevents the accumulation of dust, dirt, or moisture in long duct runs, improving the system's efficiency and lifespan. The immediate positioning of the air outlet maximizes the performance of the radial fans, as the pressure differential generated by the fans is directly used to direct the airflow to the rear of the vehicle. The fans do not have to overcome any additional resistance or ductwork, resulting in more efficient use of fan power.

[0046] The direct arrangement allows for an even distribution of the exhaust airflow in the rear of the vehicle. Because the air outlet is directly connected to the fans, the air is distributed without intermediate stages, contributing to a consistent and controlled exhaust airflow. This even distribution reduces the likelihood of local turbulence and improves ride comfort for all occupants, especially those in the second row. As a result, the system can operate with less energy, since the exhaust airflow is directed from the fan to the rear of the vehicle without the need for additional pressure build-up.

[0047] The close proximity of the air outlet to the radial fans also contributes to noise reduction. Because the air flows directly into the rear of the vehicle without detours or additional obstructions, there is less airflow noise and vibration. This increases acoustic comfort in the vehicle and prevents disturbing wind noise that could be caused by air turbulence in longer ducts or uneven airflow.

[0048] Advantageously, a control unit can be provided, allowing the blower to be controlled and / or regulated depending on the convertible's speed. The control unit influences the dynamic adjustment of the incoming and / or outgoing airflow to optimize occupant comfort and maximize system efficiency. The control unit is an electronic component that monitors and regulates the performance and operation of the radial fans in the wind deflector system. The control unit regulates the blower based on the convertible's speed.

[0049] At low speeds (e.g., city traffic, below 50 km / h), natural air turbulence in the interior is reduced. Therefore, the control unit reduces the fan power or switches it to a minimum setting to save energy and minimize noise.

[0050] At moderate speeds (e.g., on country roads, between 50 and 100 km / h), noticeable turbulence already occurs in the interior. The control unit moderately increases the blower output to generate sufficient airflow to compensate for the resulting turbulence. The speed of the radial fans is adjusted accordingly.

[0051] At high speeds (e.g., on the motorway, above 100 km / h), the wind resistance increases considerably, and air turbulence in the convertible's interior becomes more pronounced. In this case, the control unit increases the fan speed to a higher level or to maximum to generate a strong airflow that aids in equalizing air pressure and reducing turbulence.

[0052] The control unit is not only capable of controlling the fan speed based on predefined speed ranges, but can also regulate it dynamically. This real-time control is based on continuous feedback from the speed sensors. The control unit continuously receives data from the speed sensors. With every change in driving speed, the unit immediately calculates the new optimal fan speed. Based on the current speed, the control unit adjusts the voltage and current of the radial fan motors to regulate the fan speed in real time. This adjustment is achieved, for example, through digital control with a PID controller (proportional-integral-differential controller), which ensures precise control. By adjusting the fan speed to the current driving speed, energy consumption is optimized.The blowers operate only at the power necessary to achieve the desired airflow effects. The control unit ensures that the convertible's interior remains comfortable under all driving conditions. At high speeds, it provides maximum airflow to minimize turbulence, while at low speeds, it reduces fan noise and energy consumption. Because the control unit only increases the blower power when truly needed, unnecessary noise is avoided. This contributes to a quieter and more pleasant driving experience.

[0053] The above problem is further solved by a convertible vehicle according to the invention, comprising a front row of seats, a rear row of seats, and a wind deflector system according to the invention, wherein the wind deflector system is arranged at the rear of the rear row of seats. This results in the same advantages for a convertible according to the invention as have already been described for a wind deflector system according to the invention.

[0054] In the preferred embodiment, the blower, in particular the two radial fans, is located behind the rear row of seats in the vehicle. The airflows are advantageously controlled directly behind the passengers of the second row of seats and directed into the rear area.

[0055] The placement of the two radial fans behind the rear seats also contributes to reducing noise and vibrations in the interior. Because the fans are positioned behind the passengers, the seats act as a kind of sound insulation, dampening the noise generated by the fans.

[0056] It can be advantageous if the airflow from the rear seats is directed out of the convertible via the air outlet. Therefore, the outgoing airflow is designed to flow from the rear seats into the rear of the convertible and then out of the vehicle. This arrangement serves to precisely control the airflow, minimizing turbulence in the vehicle's interior and maximizing passenger comfort. The air outlet is strategically located behind the rear seats of the convertible.

[0057] The air outlet is arranged so that it is positioned as close as possible to the back of the seatbacks of the rear row of seats, allowing the airflow to be directed out of the vehicle.

[0058] The air outlet is designed to direct the exhaust airflow from the vehicle to the rear. This is achieved through a special shape and construction of the outlet, particularly the outlet opening, which controls the direction of the airflow.

[0059] The air outlet can be equipped with louvers or guide elements that precisely direct the outgoing airflow. These louvers can be angled to the horizontal so that the air is automatically directed rearward upon exiting the outlet. The louvers can be fixed or adjustable to adapt the airflow direction as needed. The air outlet is integrated into the vehicle in such a way as to create a transition between the interior and the exterior. This integration takes place in an area that allows a direct connection to the rear of the vehicle, enabling unobstructed airflow to the outside.

[0060] The two radial fans, located behind the rear seats, generate the necessary airflow. They draw in air from the sides of the vehicle and direct it into the air duct. The air duct carries the airflow directly to the air outlet, which is positioned so that the air is directed rearward by the orientation of the outlet opening.

[0061] As the air exits the radial fans, it flows directly into the air outlet, which directs the airflow out of the vehicle. By directing the airflow to the rear, the air is carried out of the vehicle, thus preventing air turbulence from being drawn back into the passenger compartment.

[0062] The air outlet allows for efficient airflow, as the generated airflow is directed straight outwards to the rear of the vehicle without any detours. This increases the efficiency of the wind deflector system, as no energy is lost routing the air through longer ducts. The immediate airflow also helps minimize the energy consumption of the radial fans, since the airflow can escape via the shortest possible path. The optional louvers or guide elements of the air outlet can be positioned at an optimal angle to the horizontal to promote vertical airflow. These louvers are made of a lightweight, robust material that directs the airflow without any adverse effects from resistance or deformation.

[0063] The air outlet can also be equipped with variable guide elements that allow the airflow direction to be dynamically adjusted as needed. These elements can be electronically controlled to optimize airflow depending on driving speed or external conditions.

[0064] In summary, the special design of the air outlet, with its louvers or guide elements, directs the airflow rearward to the stagnation point in the rear of the vehicle, thus minimizing turbulence in the interior and improving driving comfort. The immediate discharge of air to the outside ensures energy-efficient operation of the system and prevents disruptive backflow in the passenger compartment.

[0065] Advantageously, at least the first air intake can be located on a rear side window on the driver's side and the second air intake on a rear side window on the passenger side of the convertible. Consequently, the first and second air intakes are positioned so that they are located on the rear side windows of the vehicle – the first on the driver's side and the second on the passenger side. This technical configuration allows for a symmetrical and efficient intake of incoming airflow from both sides of the vehicle, minimizing air turbulence.

[0066] The first air intake is strategically positioned on the driver's side window of the convertible, preferably near the rear quarter panel or rear window. This placement allows for efficient intake of air from the vehicle's side airflow while the vehicle is in motion. Positioning the air intake near the side window ensures that ambient air is drawn in with minimal resistance. This location utilizes the natural airflow along the vehicle's body and promotes a consistent air intake.

[0067] The second air intake is located symmetrically to the first air intake on the passenger-side side window of the convertible. Here, too, the placement is preferably in the area of ​​the rear quarter panel or the rear windows. This positioning draws air from the side air intake on the right side of the vehicle. The symmetrical arrangement of the air intakes ensures a uniform air supply from both sides of the vehicle. The air intakes are advantageously designed to be seamlessly integrated into the convertible's window frames. This means that the intakes are recessed either into the upper or side window frames to minimize aerodynamic disturbances and avoid compromising the vehicle's appearance.

[0068] The design of the inlets is optimized to draw in air with minimal resistance. The inlets can be equipped with aerodynamic grilles or louvers that direct the airflow evenly into the inlet and prevent foreign matter or water from entering the system.

[0069] From the inlets, the incoming airflow is guided through the air duct to the radial fans located behind the rear row of seats. The duct is preferably designed to direct the airflow without unnecessary bends or constrictions in order to minimize flow losses.

[0070] The first air intake on the driver's side is fluidically connected directly to the first radial fan, while the second air intake on the passenger side is connected to the second radial fan. This direct connection ensures that the intake air reaches the fans efficiently and with minimal loss. As the convertible moves, an airflow is generated along the sides of the vehicle by the wind. The arrangement of the air intakes at the side windows utilizes this airflow to efficiently direct the air into the wind deflector system.

[0071] The first air intake on the driver's side and the second on the passenger side draw in the incoming airflow, with the radial fans providing the necessary suction. The symmetrical positioning of the air intakes at the two side windows ensures an even supply of air from both sides of the vehicle. By efficiently utilizing the natural airflow and the symmetrical arrangement of the intakes, the effectiveness of the wind deflector system is maximized, as the airflow is conveyed and distributed evenly. Positioning the air intakes at the side windows allows the vehicle's natural aerodynamics to be used to effectively draw in the airflow. This reduces the need to generate additional suction from the radial fans, thus lowering the system's energy consumption. The direct connection between the air intakes and the radial fans ensures efficient air distribution.The air is drawn in without detours or resistance and directed straight to the fans, minimizing flow losses.

[0072] In summary, the efficient intake and guidance of the airflow creates a wind deflector effect that protects the occupants from wind noise and drafts. Controlling the airflow through the air outlet allows for flexible adaptation to different driving conditions and maximizes driving comfort, while simultaneously ensuring the system's efficiency through optimized airflow and minimal energy consumption.

[0073] The above problem is further solved by a method according to the invention for controlling a wind deflector system according to the invention. This results in the same advantages with respect to a method according to the invention as have already been described with respect to a wind deflector system and a convertible vehicle according to the invention.

[0074] The described method for generating a wind deflector effect is based on controlling an airflow using a blower and an air duct, with the wind deflector being created as a non-physical barrier by the airflow. The method begins with the intake of the airflow by means of a blower. This blower generates the necessary negative pressure to draw air from the surroundings into the system. It can be a radial or axial blower that provides a high air flow rate and is capable of continuously generating the required airflow. The airflow is directed into the air duct, which comprises a first air inlet, a second air inlet, and an air outlet. The first air inlet is preferably located on the driver's side of the vehicle, while the second air inlet is preferably positioned on the passenger side.This symmetrical arrangement of the air intakes ensures an even intake of air on both sides of the vehicle.

[0075] The air outlet is designed to direct the airflow from the duct to create an outlet airflow. This outlet airflow is released from the air duct at a specific velocity and pressure. The precise alignment and control of this airflow prevent a stagnation point from forming in the rear of the vehicle, thus preventing backflow into the passenger compartment due to the avoided pressure differential. This outlet airflow replaces a physical wind deflector, which prevents turbulence and air eddies from entering the interior. A non-physical wind deflector consists of a continuous airflow that favorably alters the pressure and flow conditions in the rear of the vehicle.

[0076] Further advantages, features, and details of the invention will become apparent from the following description, in which a single embodiment of the invention is described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination. Fig. 1 schematically a section of a convertible vehicle according to the invention with a possible embodiment of a wind deflector system according to the invention and Fig. 2 the embodiment of Fig. 1. A different perspective on the convertible vehicle.

[0077] The figures use identical reference numerals for the same technical features, even for different embodiments or figures.

[0078] In the Fig. Figure 1 shows a rear view of a convertible vehicle 100 according to the invention, with a front row of seats 110 and a rear row of seats 111, wherein a wind deflector system 10 according to the invention is arranged on a rear side 112 of the rear row of seats 111. The wind deflector system 10 comprises an air duct 20 through which the inlet airflow EL flows in and the outlet airflow AL flows out. For this purpose, the air duct 20 has a first air inlet 21 and a second air inlet 22. In the rear view shown, the first air inlet 21 is arranged on a left side window 130 and the second air inlet 22 on a right side window 131. Thus, an inlet airflow EL is drawn in from both sides via the two (lateral) air inlets 21, 22 by means of the blower 30. For this purpose, the blower 30 has two radial fans arranged side by side.The radial fans of the blower 30 are fluidically connected to the air inlets 21, 22 and the outlet 23.

[0079] Furthermore, the outlet 23 is located directly adjacent to the blower 30. The air outlet 23 has a funnel-shaped outlet opening 23.1 through which the output airflow AL is directed out. It can be seen that the two air inlets 21, 22 extend laterally from the blower 30. Accordingly, a first duct section for the air inlet 21 extends from the first radial fan to an area at the side window 130, and a second duct section for the second air inlet 22 extends to an area of ​​the side window 131.

[0080] The air outlet 23 and the blower 30 are arranged centrally between the two air inlets 21 and 22. The air outlet 23 extends vertically from the blower 30. The outlet opening 23.1 of the air outlet 23 is positioned such that its upper end terminates in the area of ​​the rear seat row 111. At this point, the funnel-shaped outlet opening 23.1 has its widest section. This ensures optimal distribution of the output airflow AL.

[0081] In the configuration shown, the radial fans of the blower 30 are located behind the rear seat row 111 of the convertible vehicle 100. The airflow is advantageously controlled directly behind the passengers of the second seat row 111 and directed into the rear area 140. This arrangement also offers a good way to specifically regulate the airflow for the passengers of the second seat row 111 by reducing turbulence and increasing comfort.

[0082] The incoming airflow, which is drawn in by the two radial fans via the side air inlets 21, 22, is then directed into the rear area 140 located behind the rear seat row 111.

[0083] The placement of the two radial fans behind the rear seats also contributes to reducing noise and vibrations in the interior. Because the fans are positioned behind the passengers, the seats act as a kind of sound insulation, dampening the noise generated by the fans.

[0084] The air outlet 23 is centrally located between the two radial fans, so that the incoming airflows from both sides of the vehicle are collected and evenly distributed. This design ensures that no airflow losses occur and that the air is conveyed with minimal resistance. Through its fluidic connection with both radial fans, the air outlet 23 ensures an even distribution of the output airflow AL. The combined output airflow AL from the first and second radial fans is directed centrally through the air outlet opening 23.1 into the rear section 140 of the vehicle 100. The air duct 20 carries the incoming airflow EL directly to the blower 30 and from there to the air outlet 23, which is positioned and designed so that the air is directed rearward by the orientation of the outlet opening 23.1.

[0085] Control unit 40 influences the dynamic adjustment of the inlet and / or outlet airflow to optimize occupant comfort and maximize system efficiency. For this purpose, control unit 40 is connected to blower 30 and the vehicle control unit via signal transmission.

[0086] In the Fig. Figure 2 shows the convertible vehicle 100 with the wind deflector system 10 according to the invention from a different perspective. The wind deflector system 10 is designed for a convertible vehicle 100 with at least two rows of seats, wherein in Fig.Figure 2 shows only the rear seat row 111. It comprises at least one air duct 20 with a first air inlet 21, a second air inlet 22, and an air outlet 23. This system is designed to create a wind deflector effect by directing an inlet airflow EL through the air duct and releasing it as an outlet airflow from the outlet opening 23.1 of the air outlet 23 into the rear area 140 of the vehicle 100.

[0087] The air duct 20 is a central element of the wind deflector system 10, which directs the incoming airflows EL from the side area of ​​the convertible vehicle 100 to the rear area 140. It connects the air inlets 21, 22 with the air outlet 23 and enables the guidance and control of the airflows through the system.

[0088] The air duct 20 preferably comprises an aerodynamically optimized, flow-optimized pipe or duct system that minimizes flow losses and maximizes system efficiency. The duct material is lightweight and durable, often made of plastic and / or aluminum, to withstand stresses while keeping the vehicle weight low.

[0089] The air inlets 21 and 22 are designed to receive the incoming airflow EL. The inlets 21 and 22 can be equipped with aerodynamic grilles or louvers that direct the airflow evenly into the duct while simultaneously preventing foreign matter or water from entering the system.

[0090] The air outlet 23 is positioned centrally between the first and second air inlets 21, 22. This central arrangement enables effective control of the output airflow AL and ensures that the input airflows EL from both inlets 21, 22 are collected and combined before being directed through the outlet 23 into the rear area 140 of the convertible 100.

[0091] The air outlet 23, in particular the outlet opening 23.1, is designed to direct the outgoing airflow AL specifically towards the rear area 140 of the vehicle in order to create the wind deflector effect. It can be equipped with variable louvers or diffusers that homogenize the airflow AL and direct it in the desired direction.

[0092] The wind deflector system 10 uses at least one blower 30, which draws in the inlet airflow EL from the environment and directs it through the air inlets 21, 22 into the air duct 20. The blower 30 generates the necessary negative pressure to effectively draw the air into the system.

[0093] The airflow drawn in through the air inlets (inlet airflow) is directed into the air duct 20, where it is guided uniformly by the design of the duct 20, in particular the outlet opening 23.1, and the flow elements (such as louvers or grilles).

[0094] The air outlet 23, in particular the air outlet opening 23.1, is designed such that the combined airflow (outlet airflow AL) flows at a specific speed and direction. The outlet airflow AL is directed upwards or to the rear to create an air barrier that intercepts the airflow and thus prevents turbulence and air turbulence from occurring in the interior.

[0095] By selectively controlling the outflow airflow AL from the air outlet 23, in particular the outlet opening 23.1, a wind deflector effect is created. This effect protects the occupants from disturbing wind noise and drafts by preventing backflow of air into the interior through the avoidance of a stagnation point and thus the formation of a pressure difference.

Claims

[1] Wind deflector system (10) for a convertible vehicle (100) having at least one front and one rear row of seats (110, 111), with at least one air duct (20), wherein the air duct (20) comprises at least one first air inlet (21), one second air inlet (22) and one air outlet (23), wherein the air inlets (21, 22) are configured such that an inlet airflow (EL) can be drawn in by means of at least one blower (30) and guided through the air duct (20), wherein the outlet (23) is arranged between the first air inlet (21) and the second air inlet (22) and is configured such that an outlet airflow (AL) can be conveyed from the outlet (23), wherein a wind deflector can be generated by the outlet airflow (AL), wherein the wind deflector system (10) is attached to a rear side (112) of the can be arranged in the rear row of seats (111). [2] Windbreak system (10) according to claim 1, characterized by, that the blower (30) is arranged between the first air inlet (21) and the second air inlet (22). [3] Windbreak system (10) according to any one of the preceding claims, characterized by , that the blower (30) is designed as a radial fan. [4] Windbreak system (10) according to the preceding claim, characterized by that two radial fans are provided, with the radial fans arranged next to each other. [5] Windbreak system (10) according to the preceding claim, characterized by , that the first radial fan is fluidically connected to the first air inlet (21) and the second radial fan is fluidically connected to the second air inlet (22). [6] Wind deflector system (10) according to one of claims 4 or 5, characterized by , that the air outlet (23) is fluidically connected to the first radial fan and the second radial fan. [7] Windbreak system (10) according to one of the preceding claims, characterized by, that the air outlet (23) is located directly on the blower (30). [8] Windbreak system (10) according to the preceding claim, characterized by , that a control unit (40) is provided, wherein the blower (30) can be controlled and / or regulated by means of the control unit (40) depending on a speed of the convertible (100). [9] Convertible vehicle (100) with a front row of seats (110), a rear row of seats (111), and a wind deflector system (10) according to one of the preceding claims, wherein the wind deflector system (10) is arranged on a rear side (112) of the rear row of seats (111). [10] Convertible vehicle (100) according to claim 9, characterized by , that the output airflow (AL) can be directed out via the air outlet (23) from the rear row of seats into a rear area (140). [11] Convertible vehicle (100) according to claim 9 or 10, characterized by, that at least one first air intake (21) is located on a rear side window (130) on a driver's side and the second air intake (22) is located on a rear side window (131) on a passenger's side of the convertible. [12] Method for controlling a wind deflector system (10) according to one of claims 1-8 of a convertible vehicle (100) according to one of claims 9-11, wherein the method comprises at least the following steps: • Drawing an inlet airflow (EL) into the air duct (20) by means of a blower (30), and • Propelling an output airflow (AL) from the air outlet (23), wherein the air outlet (23) is arranged between the first air inlet (21) and the second air inlet (22) and is designed such that the output airflow (AL) is propelled from the air outlet (23) in such a way that a wind deflector is created by the output airflow (AL).

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