motor vehicle, in particular motor car

Abstract

Motor vehicle, with at least one air inlet (3) through which air can be introduced into a flow channel (6) of the motor vehicle when the motor vehicle is moving forward, and with at least one wind turbine (9) arranged in the flow channel (6), which has at least one wind wheel (12) driven by the air introduced into the flow channel (6) via the air inlet (3) and flowing through the flow channel (6), and a generator (13) driven by the wind wheel (12), by means of which electrical energy can be provided by driving the generator (13), characterized by: - at least one blower wheel (14) arranged in the flow channel (6) downstream of the wind turbine (12), by means of which the air flowing through the flow channel (6) is to be conveyed to at least one axial compressor (15) arranged downstream of the blower wheel (14) by driving the blower wheel (14), by means of which the air is to be compressed by driving the axial compressor (15), and - at least one additional electric machine (16) provided in addition to the generator (13), common to the blower wheel (14) and the axial compressor (15), by means of which the blower wheel (14) and the axial compressor (15) can be driven, and - a turbine (18) arranged outside the flow channel (6) and provided in addition to the wind turbine (9), - a branch line (19) by means of which a portion of the air introduced into the flow channel (6) via the air inlet (3) can be diverted from the flow channel (6) downstream of the wind turbine (12) and upstream of the blower wheel (14) and directed to the turbine (18), which can be driven by means of the diverted portion of the air, and - a second generator (20) arranged outside the flow channel (6), provided in addition to the generator (13) and in addition to the electric machine (16), and driven by the turbine (18), by means of which electrical energy can be provided by driving the second generator (20), and a return line (22) by means of which the diverted part of the air can be discharged from the turbine (18) and introduced into the flow channel (6), and wherein at least one Venturi nozzle (23) is arranged in the flow channel (6) downstream of the axial compressor (15), which can be flowed through at least by the air compressed by means of the axial compressor (15), and wherein the Venturi nozzle (23) can be supplied with the part of the air flowing through the return line (22) via the return line (22) and is thus permeable to that part of the air.

Description

[0001] The invention relates to a motor vehicle, in particular a motor car, according to the preamble of claim 1.

[0002] A known electromechanical charger for a motor vehicle can be found in the generic German patent DE 10 2017 010 596 A1. Furthermore, US patent 5 280 827 A discloses a vehicle powered by an electric motor, which has a wind turbine arranged at the rear of the vehicle. Additionally, WO 2017 / 099 914 A1 discloses a system for a vehicle comprising an inlet structure, a tunnel structure, and a power generation device.

[0003] DE 10 2010 005 407 A1 describes the use of an engine cooler fan of a motor vehicle for energy recuperation during braking and / or deceleration.

[0004] DE 20 2007 010 984 U1 discloses an energy generation device, that is, a device for generating energy in objects, such as buildings and motor vehicles, by means of a flowing compressible medium, such as air.

[0005] The object of the present invention is to create a motor vehicle with an energy system with improved flow characteristics for operating generators.

[0006] This problem is solved according to the invention by a motor vehicle with the features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

[0007] The motor vehicle according to the invention, preferably designed as a motor vehicle and most preferably as a passenger vehicle, has at least one air intake arranged at its front, through which air can be introduced into a flow channel of the motor vehicle when the motor vehicle is moving forward. The air that can be introduced or is introduced into the flow channel via the air intake during forward movement constitutes, for example, the airflow. In other words, when the motor vehicle is moving forward, the airflow resulting from the forward movement, and thus the air that constitutes the airflow, can flow through the air intake and thus enter the flow channel via the air intake and subsequently flow through the flow channel.

[0008] The motor vehicle further comprises at least one wind turbine arranged in the flow channel, which has at least one impeller driven by the air introduced into the flow channel via the air intake and flowing through the channel. The wind turbine also includes a generator driven by the impeller, which is also referred to as the first generator. Electrical energy can be provided by driving the generator. In other words, by driving the impeller with the air flowing through the flow channel, the impeller can provide mechanical energy, particularly via a drive shaft, which can then drive the generator. In other words, the mechanical energy provided by the impeller can be supplied to the generator.The generator converts the mechanical energy supplied to it into electrical energy, which the generator can then provide. This electrical energy can be used, for example, to operate at least one electrical consumer, particularly directly, i.e., without intermediate storage in an energy storage device, or it can be stored in an electrical energy storage device. Preferably, the motor vehicle includes an electrical energy storage device. Preferably, the electrical energy storage device is a high-voltage component with an electrical voltage, particularly an operating and nominal voltage, preferably greater than 50 volts, more preferably greater than 60 volts, and most preferably several hundred volts.In particular, the electrical energy storage device can be a battery, especially a high-voltage battery (HV battery). The motor vehicle is preferably an electric vehicle, especially a battery-electric vehicle.

[0009] According to the invention, the motor vehicle has at least one blower wheel arranged in the flow channel downstream of the wind turbine, which is also referred to as a blower or is a component of a blower. By driving the blower wheel, the air flowing through the flow channel is conveyed to at least one axial compressor arranged downstream of the blower wheel. In other words, when the blower wheel is driven, the air flowing through the flow channel is conveyed by the blower wheel to the axial compressor located at least downstream of the blower wheel, thereby supplying the axial compressor with the air conveyed by the blower wheel. By driving the axial compressor, the air conveyed to the axial compressor by the blower wheel, with which the axial compressor is supplied, can be compressed.

[0010] Furthermore, the vehicle has at least one additional electric machine, provided alongside the generator, which is shared by the fan wheel and the axial compressor. This means that the electric machine and the generator are separate components, with the electric machine located outside the generator, or vice versa. The electric machine can drive the fan wheel and the axial compressor, particularly simultaneously. The air intake, the flow channel, the wind turbine, the fan wheel, the axial compressor, and the electric machine form an energy system or are components of an energy system that can be operated with particular effectiveness and efficiency.The energy system allows for the particularly advantageous, efficient, and effective generation or harvesting of electrical energy from the air, specifically from the airflow generated by the vehicle, thus enabling highly energy-efficient operation of the motor vehicle. The electrical energy generated by the energy system—that is, provided or made available by the energy system—can be used to power the vehicle. The energy system can be particularly advantageously integrated into a vehicle body, such as a self-supporting structure, whose interior, also known as the passenger compartment or passenger cell, is defined by the body structure. This integration is especially beneficial in such a way that existing or conventional body designs do not require excessive modification to accommodate the energy system.In particular, the invention makes it possible to utilize the installation space freed up in vehicles designed as electric vehicles, for example, compared to conventional vehicles with combustion engines, especially in the respective engine compartment, to arrange the energy system there, at least partially, and in particular at least predominantly, thus at least more than half or even completely. This allows the energy system to be installed in a space-saving manner. In particular, the energy system makes it possible to store the electrical energy that it can provide or that it provides in the aforementioned electrical energy storage device. In this respect, the invention particularly enables the generation of electrical energy from the airflow generated by the vehicle and atmospheric pressure.

[0011] In order to achieve a particularly efficient operation of the energy system and thus a long range of the motor vehicle, one embodiment of the invention provides that the electric machine is arranged outside the flow channel.

[0012] The invention is characterized in that the motor vehicle has a turbine arranged outside the flow channel and provided in addition to the wind turbine, which is also referred to as the second turbine. The wind turbine is, for example, referred to as the first turbine. For example, the second turbine is or comprises at least one turbine wheel.

[0013] According to the invention, the motor vehicle also has a branch line by means of which a portion of the air introduced into the flow channel via the air inlet and subsequently flowing at least partially through the flow channel can be diverted from the flow channel downstream of the wind turbine and upstream of the fan wheel and directed to the second turbine. In other words, by means of the branch line, a portion of the air introduced into the flow channel via the air inlet can be diverted from the flow channel and directed into the branch line at at least one branch point arranged in the direction of airflow downstream of the wind turbine and upstream of the fan wheel. The diverted portion of air, thus directed into the branch line, can then be directed to the second turbine, which can be driven by the diverted portion of air flowing through the branch line.

[0014] According to the invention, the motor vehicle also has a second generator arranged outside the flow channel, in addition to the first generator and the electric machine, which can be driven by the second turbine. Electrical energy can be provided by driving the second generator. In other words, the second turbine can provide mechanical energy, driven in particular via a second output shaft, which can be supplied to the second generator. The mechanical energy supplied to the second generator can then be converted into electrical energy.The electrical energy supplied by the second generator can, for example, power and operate the aforementioned consumer and / or another consumer, and / or the electrical energy supplied by the second generator can be stored in the aforementioned energy storage system. The second turbine, the branch line, and the second generator are further components of the energy system, which can thus be operated particularly effectively and efficiently.

[0015] To enable particularly advantageous driving of the second generator, thus allowing it to operate with high efficiency, a gearbox is provided in a further embodiment of the invention, through which the second generator can be driven by the turbine. It is preferably provided that the gearbox, particularly with respect to a torque and / or force transmission from the second turbine to the second generator, through which a torque and / or force can be transmitted from the turbine to the second generator and thereby drive it, has a gear ratio other than one. This allows the turbine and the second generator, in particular a rotor of the second generator, to rotate at different speeds, so that both the second turbine and the second generator can be operated with optimal bending coefficients.

[0016] The invention is characterized by a return line by means of which the diverted portion of the air from the second turbine can be discharged and introduced into the flow channel. This enables particularly efficient operation of the energy system.

[0017] In the invention, at least one Venturi nozzle is arranged in the flow channel downstream of the axial compressor, through which air compressed by the axial compressor can flow. The Venturi nozzle is, for example, a component of an ejector, which is arranged downstream of the axial compressor and through which air compressed by the axial compressor can flow. This means that the air compressed by the axial compressor can flow at least partially through the Venturi nozzle or the ejector. The Venturi nozzle or the ejector can provide particularly advantageous guidance and / or control of the air, thus enabling particularly efficient operation of the energy system. In particular, the energy system then also includes the Venturi nozzle or the ejector.

[0018] To achieve particularly efficient and effective operation of the energy system, the invention provides that the Venturi nozzle, in particular the ejector, can be supplied with the portion of air flowing through the return line via the return line and thus be permeated by this portion of air. The Venturi nozzle, in particular the ejector, can, for example, function as a pump, in particular a jet pump, or be designed by means of which, for example, the diverted portion of air can be advantageously conveyed, in particular drawn, through the return line and via this through the second turbine. This enables particularly efficient and effective operation of the second turbine, allowing the energy system to provide a particularly high amount of electrical energy in a short time.

[0019] To supply the Venturi nozzle with the portion of air flowing into the second turbine and the return line, the return line opens into the Venturi nozzle, for example, or the return line opens into the flow channel at an outlet point, wherein the outlet point is arranged, for example, upstream of the Venturi nozzle and preferably downstream of the axial compressor, wherein the Venturi nozzle can be supplied with the portion of air flowing through the return line via the outlet point.

[0020] In order to advantageously influence the air flowing through the flow channel, and in particular its flow, and consequently to ensure particularly efficient and effective operation, a further embodiment of the invention provides that the motor vehicle, in particular the energy system, has a diffuser arranged in the flow channel downstream of the Venturi nozzle and through which the air flowing through the Venturi nozzle can flow. The diffuser is designed for a lower Mach number than one, i.e., a lower flow velocity of the air flowing through the flow channel than the speed of sound, so that the diffuser has a flow cross-section, also referred to as the flow cross-section, through which the air can flow, and which widens in a funnel shape in the direction of airflow through the flow channel and thus the diffuser.

[0021] In order to supply the air to the blower in a particularly advantageous manner after it has driven the wind turbine, and thus to achieve particularly efficient operation, a further embodiment of the invention provides that at least one longitudinal section of the flow channel is funnel-shaped and thereby extends from the wind turbine towards the blower wheel. considered, in particular at least substantially continuously tapered, wherein the blower wheel is arranged in the length range or downstream of the length range.

[0022] The wind turbine is, for example, located upstream of the main section and thus within a second section of the flow channel, also located upstream of the main section. This second section, viewed from the wind turbine towards the fan wheel, has a constant inner circumference, particularly an inner diameter. This allows the air to be guided in a particularly streamlined manner, enabling the air to drive the wind turbine with exceptional efficiency.

[0023] Finally, it has proven particularly advantageous if the motor vehicle, especially the energy system, has an adjustment device by means of which the cross-sectional area through which the air flows, and thus the volume flow rate of the air flowing through the flow channel, can be adjusted. The adjustment device can be arranged in the flow channel, and in particular upstream of the wind turbine, so that the adjustable cross-sectional area is located in the flow channel and preferably upstream of the wind turbine. Furthermore, it is conceivable that the adjustment device, and thus the adjustable cross-sectional area, is arranged in the air inlet. It is also conceivable that the adjustment device is arranged upstream of the air inlet.The adjustment device allows the volume flow of the air flowing through the flow channel to be set as needed, so that the volume flow can be adjusted to different operating states and / or environmental conditions. This ensures particularly efficient operation of the energy system.

[0024] Further details of the invention will become apparent from the following description of a preferred embodiment with the accompanying drawings. These show: Fig. 1 a schematic sectional view of an energy system of a motor vehicle; Fig. 2. A schematic cross-sectional view of the energy system; Fig. 3. A further schematic sectional view of the energy system; and Fig. 4. A further schematic sectional view of the energy system.

[0025] In the figures, identical or functionally equivalent elements are provided with the same reference symbols.

[0026] Fig. Figure 1 shows a schematic sectional view of an energy system 1 of a motor vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, has the energy system 1 in its fully manufactured state. Furthermore, the motor vehicle has, for example, a body, which is preferably designed as a self-supporting body. The interior of the motor vehicle, also referred to as the passenger compartment or passenger cell, is bounded by the body. For example, the body also bounds an engine compartment, which is located, in particular, at the front of the motor vehicle and thus front-mounted, but which could alternatively be located at the rear of the motor vehicle and thus rear-mounted.In the engine compartment, for example, a first electric machine of the motor vehicle, also referred to as a traction machine, is arranged. The vehicle can be driven, for example, purely electrically by means of the traction machine. Thus, the motor vehicle is preferably an electric vehicle. The traction machine is preferably a high-voltage component whose electrical voltage, in particular its operating and nominal voltage, is preferably greater than 50 volts, particularly greater than 60 volts, and most preferably several hundred volts. The motor vehicle also includes an electrical energy storage device, not shown in the figures, which is preferably a battery. Preferably, the electrical energy storage device is a high-voltage component whose electrical voltage, in particular its operating or nominal voltage, is preferably greater than 50 volts, particularly greater than 60 volts, and most preferably several hundred volts.Electrical energy can be stored using an electrical energy storage device. The traction machine can be powered by the electrical energy stored in the energy storage device, thus enabling the traction machine to be operated as an electric motor, particularly for purely electric propulsion of the vehicle. Therefore, the electric machine is, for example, an electrical consumer that can be powered and operated by the electrical energy stored in the energy storage device.

[0027] Compared to conventionally powered vehicles with internal combustion engines, some components in the engine compartment can be omitted, thus freeing up space, i.e., additional installation space. In this respect, the energy system 1 can be located at least partially, and in particular, at least predominantly or even completely, in the aforementioned freed-up installation space, and thus in the engine compartment. As will be explained in more detail below, air, which typically slows the vehicle down due to air resistance during forward travel (also known as driving), can be channeled through the engine compartment, specifically through the described freed-up installation space, and through a tunnel of the vehicle. The tunnel could, for example, be a central tunnel.For example, the tunnel is formed by a floor of the structure, the floor of which at least partially, and in particular at least predominantly and thus at least more than half or even completely, limits the interior space downwards in the vehicle's vertical direction. By specifically utilizing flow effects and atmospheric pressure, electrical energy or electric current can be generated, i.e., provided, by means of energy system 1, whereby the electrical energy provided by energy system 1 can, for example, be used directly, i.e., without intermediate storage in a storage device, to operate the traction motor and / or be stored in the energy storage device. For this purpose, energy system 1, and thus the motor vehicle, exhibits [features / characteristics] at its [location / position]. Fig. 1 with 2, the front has at least one air inlet 3, which, when the motor vehicle is moving forward, can be permeated by the airflow and thus by the air forming the airflow. The airflow passing through the air inlet 3, and thus the air forming the airflow and passing through the air inlet 3, are in Fig. 1 illustrated by arrows 4.

[0028] During or while the motor vehicle is moving forward, the motor vehicle moves forward and thus into a Fig. 1. Forward direction of travel, illustrated by an arrow 5 or simply referred to as the direction of travel. During forward travel of the motor vehicle, the air forming the airflow can be introduced via the air intake 3 into a flow channel 6 of the energy system 1, and thus of the motor vehicle, such that the air introduced into the flow channel 6 via the air intake 3 at least partially flows through the flow channel 6. The flow channel 6, also referred to as the air duct, is bounded by a conduit 7, for example, designed as a solid body, in particular by an inner circumferential surface 8 of the conduit 7, especially directly.In particular, it is conceivable that the conduit assembly 7 is designed in multiple parts and thus has several conduit parts that are designed separately from one another and, in particular, can be detached without destruction, are connected to each other, each of which partially limits the flow channel 6, in particular directly.

[0029] In particular, arrows 4 illustrate a flow direction in which, or along which, the air introduced into the air duct (flow channel 6) via the air inlet 3 flows at least partially through the flow channel 6. Specifically, the flow direction is opposite to the forward direction of travel.

[0030] The energy system 1, and thus the motor vehicle, has two wind turbines 9 and 10 arranged in the flow channel 6, which run along a path perpendicular to the flow direction and in Fig. The wind turbines 9 and 10 are arranged side by side in the direction illustrated by a double arrow 11. In particular, the wind turbines 9 and 10 can each be arranged at least partially within the air inlet 3. Each wind turbine 9 or 10 has a wind wheel 12, which can be driven by the air introduced via the air inlet 3 and thus flowing at least partially through the flow channel 6, and is therefore rotatable about a respective wind wheel axis relative to the ducting device 7. Furthermore, each wind turbine 9 or 10 has a respective generator 13, which can be driven by the respective wind wheel 12 of the respective wind turbine 9 or 10 and is also referred to as the first generator.By driving the respective generator 13, each generator 13 can provide electrical energy, which can be supplied, for example, to the traction motor and / or the energy storage device and thus stored in the energy storage device. The generators 13 can therefore utilize the energy contained in the air flowing through the flow channel 6 and provide electrical energy that is available or is provided by the generators 13. The air flowing through the flow channel 6, or introduced into the flow channel 6 via the air inlet 3, is also referred to as the aforementioned driving air. The traction motor is an additional, external electrical machine provided with respect to the generators 13.

[0031] In order to achieve a long electric range, over which the vehicle can be temporarily driven electrically by the traction motor without the need to charge the energy storage device using an external energy source, the energy system 1, and thus the vehicle, has a fan wheel 14 arranged in the flow channel 6 downstream of the wind turbines 9 and 10, and thus downstream of the wind wheels 12. Fig. Figure 1 shows that the wind turbines 12 are arranged in the flow channel 6. The generators 13 can also be arranged in the flow channel 6 and thus in the ductwork 7. The fan wheel 14 is also referred to as a blower or as a component of a blower, and is arranged in the flow channel 6 and thus in the ductwork 7. In the direction of the airflow through the flow channel 6, i.e., the air flowing through the flow channel 6, the fan wheel 14 is arranged downstream of the wind turbines 12.

[0032] The energy system 1 also includes an axial compressor 15 arranged in the flow channel 6 downstream of the fan wheel 14. By driving the fan wheel 14, the air flowing into the flow channel 6 via the air inlet 3 and at least partially flowing through the flow channel 6 can be conveyed by the fan wheel 14, in particular towards the axial compressor 15, thereby supplying the axial compressor 15 with the air conveyed by the fan wheel 14. The axial compressor 15 can compress the air conveyed by the fan wheel 14, with which the axial compressor 15 is supplied.

[0033] The energy system 1 also includes an electric machine 16, provided in addition to the generators 13 and the traction machine, which is common to the blower wheel 14 and the axial compressor 15 and by means of which the blower wheel 14 and the axial compressor 15 can be driven, in particular simultaneously. By driving the blower wheel 14, it is rotated about a blower wheel axis of rotation relative to the line assembly 7, and by driving the axial compressor 15, it is rotated about an axial compressor axis of rotation relative to the line assembly 7. In the case of the Fig. In the embodiment shown in Figure 1, the fan wheel 14 and the axial compressor 15 are arranged coaxially to each other, such that the axis of rotation of the fan wheel coincides with the axis of rotation of the axial compressor, and vice versa. A shaft 17 is provided, common to both the fan wheel 14 and the axial compressor 15, via which the fan wheel 14 and the axial compressor 15 can be driven by the electric machine 16. For example, the fan wheel 14 and / or the axial compressor 15 are connected to the shaft 17 in a rotationally fixed manner.

[0034] The electric machine 16 can be operated in motor mode, thus functioning as an electric motor, which drives the blower wheel 14 and the axial compressor 15, particularly via the shaft 17. To operate the electric machine 16 in motor mode, it is supplied with electrical energy, for example, from the energy storage device. The electric machine 16 is provided in addition to the generators 13 and the traction motor. The blower wheel 14 and the axial compressor 15 differ from each other primarily in that the air conveyed by the blower wheel 14 is not compressed, or only slightly compressed, by the blower wheel 14 compared to the axial compressor 15. In other words, the air is compressed significantly more by the axial compressor 15 than by the blower wheel 14.Thus, the blower wheel 14 functions in particular as a fan, for example to convey the air through the flow channel 6 and especially to the axial compressor 15. Fig. 1 can be seen that the electric machine 16 is arranged outside the flow channel 6, which allows the air to flow through the flow channel 6 in a particularly streamlined manner.

[0035] The energy system 1 also includes a turbine 18, also referred to as a second turbine, which is arranged outside the flow channel 6 and thus outside the ducting system 7, in addition to the wind turbines 9 and 10. Furthermore, the energy system 1 includes a branch line 19, by means of which a portion of the air introduced into the flow channel 6 via the air inlet 3 and subsequently flowing at least partially through the flow channel 6 can be diverted from the flow channel 6 and introduced into the branch line 19 at a branch point A arranged in the direction of airflow through the flow channel 6 downstream of the wind turbines 12 and upstream of the fan wheel 14. The diverted portion of air, introduced into the branch line 19, can subsequently flow through the branch line 19 and is guided to the turbine 18 via the branch line 19, which can thus be supplied with the diverted portion of air.This means that the turbine 18 can be driven by the portion of air diverted via the branch line 19 and flowing through the branch line 19. Furthermore, the energy system 1 includes a second generator 20, located outside the flow channel 6 and thus outside the ducting system 7, in addition to the generators 13, the electric machine 16, and the traction machine. This second generator 20 can be driven by the second turbine 18. By driving the generator 20, it can provide electrical energy, which can be stored, for example, in the energy storage device. A gearbox 21 is provided through which the turbine 18 can drive the generator 20.

[0036] Energy system 1 also includes a return line 22, by means of which the diverted portion of air from the second turbine 18 can be discharged and introduced into the flow channel 6. This means that the diverted portion of air, after driving the turbine 18, can flow through the return line 22 and thus be guided back into the flow channel 6 via the return line 22.

[0037] Turbine 18 is an expansion turbine, by means of which the portion of air flowing through turbine 18 is expanded, i.e., decompressed. Turbine 18 is driven by a suction effect, the generation of which will be explained in more detail below.

[0038] In the flow channel 6, and thus in the ductwork 7, an ejector 23 of the energy system 1 is arranged downstream of the axial compressor 15. The ejector 23 comprises at least one Venturi nozzle, which is not visible in the figures. The air compressed by the axial compressor 15 can flow through the ejector 23 and thus through the Venturi nozzle after it has been compressed by the axial compressor 15. The return line 22 opens into the flow channel 6 in such a way that the ejector 23, and in particular the Venturi nozzle, can be supplied with the portion of air flowing through the return line 22 and is thus permeable to this portion of air. The aforementioned suction effect is generated, for example, by means of the ejector 23 and / or the Venturi nozzle. For this purpose, the ejector 23 or the Venturi nozzle functions, for example, as a jet pump. In other words, the ejector 23 or the Venturi nozzle can be designed as a jet pump.The jet pump uses the air flowing through the ejector 23, compressed and conveyed by the axial compressor 15, as a motive medium to draw in the portion of air flowing through the branch line 19, the turbine 18, and the return line 22 as a suction medium and thereby convey it through the branch line 19, the turbine 18, and the return line 22. In other words, the ejector 23, particularly using the air compressed and conveyed by the axial compressor 15 as its motive medium, generates the suction effect by which the portion of air is conveyed, or rather, drawn, through the branch line 19, the turbine 18, and the return line 22. This allows the turbine 18, designed as an expansion turbine, to be driven particularly effectively and efficiently, which in turn allows the generator 20 to be operated effectively and efficiently, particularly via the gearbox 21.

[0039] The energy system 1 also features a diffuser 24 located in the flow channel 6 and downstream of the ejector 23 and thus the Venturi nozzle. The diffuser 24 is open to air flowing through the Venturi nozzle or ejector 23, and its cross-sectional area increases (i.e., widens) in the direction of air flow through the diffuser 24 and thus the flow channel 6. The diffuser 24 can be used as a silencer to prevent excessive noise.

[0040] In particular, the axial compressor 15 can be connected to the ejector 23 and thus to the Venturi nozzle, so that, for example, all the air compressed by the axial compressor 15 flows through the ejector 23. It is conceivable that the ejector 23 has exactly one Venturi nozzle, particularly in the form of the aforementioned Venturi nozzle, or that the ejector 23 has several Venturi nozzles through which the air flows, which, for example, are arranged one after the other, thus sequentially in the direction of airflow through the ejector 23. The Venturi nozzle, and thus the ejector 23, can generate a negative pressure and thus the aforementioned suction effect, by means of which the diverted portion of the air is drawn in and thereby conveyed through the branch line 19, the turbine 18, and the return line 22.

[0041] At the in Fig. In the embodiment shown in Figure 1, the fan wheel 14 and the axial compressor 15 can be driven by the electric machine 16 via a common gearbox 25 of the energy system 1. In particular, the shaft 17 can be driven by the electric machine 16 via the gearbox 25. It is particularly conceivable that the fan wheel 14 and the axial compressor 15 are connected to each other via the common gearbox 25 for torque transmission. In particular, the gearbox 25 can be driven by the electric machine 16 via a further shaft 26, whereby the fan wheel 14 and the axial compressor 15 can be driven, in particular simultaneously, by driving the gearbox 25. The fan (fan wheel 14) accelerates the air coming from the wind turbines 12 and flowing towards the fan wheel 14 in the flow channel 6 and thereby supplies the axial compressor 15 with air.

[0042] Furthermore, it is from Fig. It is evident that at least one longitudinal region L of the flow channel 6, and thus of the ducting device 7, is designed as a funnel 27, wherein the funnel-shaped longitudinal region L, or the funnel 27, tapers from the respective wind turbine 12 towards the fan wheel 14. This means that a flow cross-section, bounded by the funnel 27, in particular by an inner circumferential surface 28 of the funnel 27, and through which the air flowing through the flow channel 6 can flow, tapers in the direction of the air flowing through the flow channel 6, and thus from the respective wind turbine 12 towards the fan wheel 14, in particular at least substantially continuously. The funnel 27 is a funnel-shaped device by means of which the air coming from the wind turbines 12 is directed in a controlled and advantageous manner to the fan wheel 14.The ducting system 7, and thus the flow channel 6, is at least partially located in the aforementioned engine compartment, in particular such that, for example, at least the wind turbines 12 and the air inlet 3 are located in the engine compartment. This allows the air that initially flows into the engine compartment to flow from the engine compartment into the flow channel 6 via the air inlet 3.

[0043] Out of Fig. 1. It is apparent that in the Fig. In the embodiment shown in Figure 1, the air inlet 3 is divided into two partial inlets 30 and 31 by means of a partition element 29. The partial inlets 30 and 31 are arranged, for example, side by side along the direction illustrated by the double arrow 11, so that the partition element 29 is arranged between the partial inlets 30 and 31, particularly along the direction illustrated by the double arrow 11. The partition element 29 is a divider or is also referred to as a partition. It is specifically provided that the partition element 29 is arranged between the wind turbines 12 along the direction illustrated by the double arrow 11, so that each wind turbine 12 is at least predominantly, and in particular completely, overlapped or covered by the partition element 29 with respect to the other wind turbine 12. This allows unfavorable air turbulence to be avoided or at least minimized.

[0044] Advantageously, energy system 1 has a Fig. Figure 1 shows a particularly schematically illustrated adjustment device 32, by means of which at least one flow cross-section Q through which the air flowing through the flow channel 6 can be adjusted and thereby changed. By adjusting or changing the flow cross-section Q, a volume flow of the air flowing through the flow channel 6 can be set, i.e., changed. This allows, for example, the regulation of the air supply to the wind turbines 12 at different speeds at which the vehicle is driven forward. For example, the adjustment device 32 is designed as a controllable or adjustable louver system. Alternatively or additionally, the adjustment device 32 can have at least one or more controllable or adjustable ventilation rosettes. In the case of the Fig. In the embodiment shown in Figure 1, the adjusting device 32 is arranged upstream of the air inlet 3 and thus upstream of the partial inlets 30 and 31 in the direction of air flow through the air inlet 3.

[0045] Since a dynamic pressure can form in the funnel-shaped length section L and thus in the funnel 27 (funnel-shaped device), which could potentially bring the wind turbines 9 and 10, i.e., their wind turbines 12, to a standstill if no appropriate countermeasures are taken, such a dynamic pressure that may form in the length section L is prevented or at least advantageously kept low by diverting the aforementioned portion of the air from the flow channel 6 and directing it to the turbine 18 by means of the branch line 19. For this purpose, the branch line 19 comprises, for example, at least one branch element 33 arranged at the branch point A, which is thus arranged in the flow channel 6, i.e., in the ducting device 7. The branch element 33 has, for example, at least one branch opening 34 arranged in the flow channel 6 at the branch point A.In other words, for example, the branch opening 34 is bounded by the branch element 33, in particular completely around its circumference. The aforementioned portion of the air flowing from the wind turbines 12 towards the branch element 33 through the flow channel 6 can flow through the branch opening 34 and thus into the branch element 33 and thereby into the branch line 19, thereby diverting the portion from the flow channel 6.

[0046] The portion of air diverted from the flow channel 6 via the branch line 19 is also referred to as the first portion. The air that is not diverted from the flow channel via the branch line 19, but instead flows past the branch element 33 and towards the blower wheel 14, is also referred to as the second portion. It is particularly conceivable that the ejector 23 and the axial compressor 15 form a unit, which may also include the diffuser 24, wherein a first subset of the second portion of the air flowing into or introduced into the flow channel 6 via the air inlet 3 is compressed and conveyed by the axial compressor 15, and wherein the first subset, compressed and conveyed by the axial compressor 15, flows through the ejector 23 and then through the diffuser 24.A second subset of the second part can, for example, flow around the aforementioned system, particularly in the manner of a jacketed turbine, in such a way that the second subset is not compressed by the axial compressor 15, does not flow through the ejector 23, and does not flow through the diffuser 24. This allows for the saving of electrical energy. The flow channel 6 or the ducting device 7 terminates, for example, like an exhaust system at the rear end, i.e., at the rear of the vehicle, so that, for example, all of the air introduced into the flow channel 6 via the air inlet 3 is released back into the open air, i.e., into the environment surrounding the vehicle, at the rear of the vehicle or behind the vehicle.

[0047] The return line 22 is also referred to as the vacuum line, via which the turbine 18 can be connected to the ejector 23, particularly fluidically. For example, the turbine 18, located outside the flow channel 6, is connected to the flow channel 6, particularly fluidically, via the branch line 19, also referred to as the pressure line, especially at the branch point A. Fig. As can be seen in Figure 1, the branch element 33, and thus the branch point A, is arranged in the funnel 27. The fan wheel 14 is arranged downstream of the funnel 27, and the wind turbines 12, and in this case also the generators 13, are arranged upstream of the funnel 27. The wind turbines 12, and in this case also the generators 13, are arranged upstream of the length section L and thus in a second length section L2 of the flow channel 6, and thus of the conduit assembly 7, which is also arranged upstream of the length section L. The second length section L2 has a constant inner circumference, in particular inner diameter, viewed from the respective wind turbine 12 towards the fan wheel 14.In other words, the inner circumferential surface 8 has a constant inner circumference, in particular a constant inner diameter, in the length range L2, and in the length range L the inner circumferential surface 8 tapers in the direction of flow of the air flowing through the flow channel 6 and thus viewed from the respective wind turbine 12 towards the blower wheel 14.

[0048] Fig. Figure 2 shows a partial schematic sectional view of energy system 1. In particular, the following are especially well illustrated: Fig. 2. The wind turbines 9 and 10 are identifiable. The wind turbines 9 and 10 are, for example, small wind turbines or small wind power plants, for example, either in a vertical, horizontal, or diagonal design and / or installation. Preferably, the wind turbines 12 have opposite directions of rotation. In other words, it is intended that during operation of the energy system 1, the wind turbines 12 rotate in opposite directions to each other. This allows any vibrations that may occur to be compensated for. The separating element 29 between the wind turbines 12, also referred to as a partition or designed as a partition, can separate excessive air turbulence that may occur at the tips of the rotor blades of the wind turbines 12 in order to avoid imbalances.

[0049] Furthermore, it looks particularly good Fig. 2. It is evident that an air filter 35, for example designed as an air filter plate, is arranged in the flow channel 6, downstream of the wind turbines 12 and, in particular, upstream of the fan wheel 14, especially upstream of the branch point A. The air flowing through the flow channel 6 can flow through this air filter 35. The air flowing through the flow channel 6 can be filtered by means of the air filter 35. Furthermore, at least one cooler 40 is arranged in the flow channel 6 downstream of the wind turbines 12, especially downstream of the air filter 35, and upstream of the fan wheel 14, especially upstream of the branch point A. The cooler 40 can be flowed through, for example, a medium, particularly a liquid, and can be surrounded by the air flowing through the flow channel. Heat can be transferred from the medium flowing through the cooler 40 to the air flowing around the cooler 40 and through the flow channel 6, thereby cooling the medium.The medium is, for example, a coolant for cooling the electrical energy storage device. Alternatively or additionally, the medium can be a refrigerant from, for example, a vehicle air conditioning system designed as a compression refrigeration unit, whereby the refrigerant can be cooled by means of the cooler 40. In this context, it is particularly conceivable that the cooler 40 functions or is designed as a condenser by means of which the medium, especially the refrigerant, can be condensed.

[0050] Fig. Figure 3 shows a schematic sectional view from above, partially depicting energy system 1. In particular, it is evident from Fig. 3 The branching element 33 is particularly easy to see. In Fig. Arrows 36 illustrate the air flowing through the flow channel 6, particularly downstream of the branching element 33. Specifically, arrows 36 illustrate a flow direction in which the air flows through the flow channel 6 downstream of the branching element 33. Most specifically, arrows 36 illustrate the second part, and in particular the flow of the second part, which remains in the flow channel 6 and is not diverted from the flow channel 6 by means of the branching element 33.

[0051] Finally, it shows Fig. 4. The energy system 1 is shown in a schematic and cutaway side view. Particularly good from Fig. 4 The branching element 33 and its branching opening 34 are recognizable. Fig.Figure 4 illustrates the first part, which flows through the branch opening 34 into the branch element 33 and thus into the branch line 19, and is therefore diverted from the flow channel 6 by means of the branch line 19. A wall section 38 of the branch element 33, and thus of the branch line 19, located in the flow channel 6, forms a wind guard, specifically such that the wall section 38 projects into the flow channel 6 from the inner circumferential surface 8 of the conduit assembly 7, which directly borders the flow channel 6. In this way, the wind guard (wall section 38) effectively captures the first part and diverts it from the second part, i.e., from the flow channel 6. Specifically, the branch line 19 acts as an intake line to direct the diverted first part to the turbine 18, which is designed as an expansion turbine.Arrows 39 illustrate the first part of the air flowing through the branch line 19 and towards the turbine 18.

[0052] The branch opening 34, also referred to as an air opening, or the branch line 19, by diverting the first portion of air from the flow channel 6, and the fan wheel 14, prevent excessive stagnation pressure in the flow channel 6, and in particular in the funnel 27. This allows the wind turbines 9 and 10, located upstream of the funnel 27 and upstream of the branch point A, to operate advantageously. An upper part of the funnel 27, for example, in the installed position of the energy system 1, is advantageously designed as a removable cover. In other words, it is conceivable that the funnel 27 is formed by at least two funnel parts, which are designed separately from one another and connected to each other, particularly in a way that allows for non-destructive detachment.One of the funnel parts is the aforementioned cover, which is preferably arranged above the other funnel part in the vehicle's vertical direction when the energy system 1 is installed. The energy system 1 assumes its installation position when the vehicle is fully assembled. If the cover is removed from the other, lower funnel part, the flow channel 6 is accessible at least along its length L, thus providing access to the branch element 33.

[0053] For example, if the initially deactivated motor vehicle is started, the electric machine 16 is supplied with electrical energy or current from the energy storage device, and is thereby started and operated. After the electric machine 16 has started, the supply of electrical energy from the energy storage device to the electric machine 16 can be stopped, and the electric machine 16 can be temporarily supplied partially with electrical energy provided by at least one of the generators 13 and / or by the generator 20.

[0054] Turbine 18 is operated by a pressure differential between the previously described vacuum generated by the ejector 23 or the Venturi nozzle and the atmospheric pressure, increased by the airflow (air resistance), which prevails, for example, at the branch point. The gearbox 21 between turbine 18 and generator 20 allows the speed range of generator 20 to be adjusted, in particular to a speed range or speed of turbine 18.

[0055] Energy system 1 is started using electrical energy from the energy storage device, in particular by starting the electric machine 16 as described above. Afterwards, energy system 1 can partially generate or provide the electrical energy used to operate the electric machine 16 and thus drive the axial compressor 15 and the fan wheel 14, in particular via the turbine 18 and the generator 20. Excess electrical energy provided by energy system 1 that is not used to operate the electric machine 16 can, for example, be stored in the energy storage device and / or used to operate an additional load provided for the electric machine 16, separate from the electric machine itself.Overall, it is evident that energy system 1 has at least or exactly three generators 13 and 20, which can generate and supply electricity, i.e., electrical energy. Furthermore, energy system 1 has at least or exactly one electric motor in the form of the electric machine 16, which consumes electrical energy. The electrical energy consumed by the electric machine 16 during its operation is part of the energy system 1's own energy needs, which it can partially meet, for example, by means of generator 20 and / or by means of at least one of the generators 13. Another advantage of energy system 1 is that a management system can be created between electricity generation, electricity consumers, and the energy storage system, thereby optimizing the size of the energy storage system and the weight of the vehicle compared to conventional solutions. Reference symbol list 1 Energy system 2 Front 3 Air intake 4 arrows 5 Arrow 6 Flow channel 7. Management equipment 8 inner circumferential surface 9 wind turbines 10 wind turbines 11 Double Arrow 12 Wind turbines 13 Generator 14 Blower wheel 15 axial compressors 16 electric machine 17th wave 18 Turbine 19 branch line 20 second generator 21 gearboxes 22 Return line 23 Ejector 24 Diffuser 25 gearboxes 26 more waves 27 funnels 28 inner circumferential surface 29 Separating element 30 partial intake 31 Partial Intake 32 Adjustment device 33 Branch element 34 Branch opening 35 air filters 36 arrows 37 Arrow 38 Wall area 39 Arrow 40 coolers A junction L Length range L2 length range Q Flow cross-section

Claims

[1] Motor vehicle, with at least one air inlet (3) through which air can be introduced into a flow channel (6) of the motor vehicle when the motor vehicle is moving forward, and with at least one wind turbine (9) arranged in the flow channel (6), which has at least one wind wheel (12) driven by the air introduced into the flow channel (6) via the air inlet (3) and flowing through the flow channel (6) and a generator (13) driven by the wind wheel (12), by means of which electrical energy can be provided by driving the generator (13), characterized by : - at least one blower wheel (14) arranged in the flow channel (6) downstream of the wind turbine (12), by means of which the air flowing through the flow channel (6) is to be conveyed to at least one axial compressor (15) arranged downstream of the blower wheel (14) by driving the blower wheel (14), by means of which the air is to be compressed by driving the axial compressor (15), and - at least one additional electric machine (16) provided in addition to the generator (13), common to the blower wheel (14) and the axial compressor (15), by means of which the blower wheel (14) and the axial compressor (15) can be driven, and - a turbine (18) arranged outside the flow channel (6) and provided in addition to the wind turbine (9), - a branch line (19) by means of which a portion of the air introduced into the flow channel (6) via the air inlet (3) can be diverted from the flow channel (6) downstream of the wind turbine (12) and upstream of the blower wheel (14) and directed to the turbine (18), which can be driven by means of the diverted portion of the air, and - a second generator (20) arranged outside the flow channel (6), provided in addition to the generator (13) and in addition to the electric machine (16), and driven by the turbine (18), by means of which electrical energy can be provided by driving the second generator (20), and a return line (22) by means of which the diverted part of the air can be discharged from the turbine (18) and introduced into the flow channel (6), and wherein at least one Venturi nozzle (23) is arranged in the flow channel (6) downstream of the axial compressor (15), which can be flowed through at least by the air compressed by means of the axial compressor (15), and wherein the Venturi nozzle (23) can be supplied with the part of the air flowing through the return line (22) via the return line (22) and can therefore be flowed through by that part of the air. [2] Motor vehicle according to claim 1, characterized by , that the electric machine (16) is arranged outside the flow channel (6). [3] Motor vehicle according to one of claims 1 or 2, characterized by a gearbox (21) via which the second generator (20) can be driven by the turbine (18). [4] Motor vehicle according to any one of claims 1 to 3, characterized by a diffuser (24) arranged in the flow channel (6) downstream of the venturi nozzle (23) and through which the air flowing through the venturi nozzle (23) can flow. [5] Motor vehicle according to any one of the preceding claims, characterized by , that at least one length section (L) of the flow channel (6) is funnel-shaped and thus tapers from the wind turbine (12) towards the blower wheel (14), which is located in the length section (L) or downstream of the length section (L). [6] Motor vehicle according to any one of the preceding claims, characterized by an adjustment device (32) by means of which at least one flow cross-section (Q) through which the air can flow and thereby a volume flow of the air flowing through the flow channel (6) can be adjusted.

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