CN114183308B - Electric automobile rear-wheel energy recovery device and control method thereof - Google Patents
Electric automobile rear-wheel energy recovery device and control method thereof Download PDFInfo
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- CN114183308B CN114183308B CN202111341908.5A CN202111341908A CN114183308B CN 114183308 B CN114183308 B CN 114183308B CN 202111341908 A CN202111341908 A CN 202111341908A CN 114183308 B CN114183308 B CN 114183308B
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- 238000011084 recovery Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000006835 compression Effects 0.000 claims abstract description 48
- 238000007906 compression Methods 0.000 claims abstract description 48
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 13
- 238000010248 power generation Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/30—Wind motors specially adapted for installation in particular locations
- F03D9/32—Wind motors specially adapted for installation in particular locations on moving objects, e.g. vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/04—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor having stationary wind-guiding means, e.g. with shrouds or channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/06—Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a device for recovering energy behind an electric automobile wheel and a control method thereof, which relate to the field of automobiles, wherein a wind energy compression device is arranged in an air duct and is prepared from elastic materials; the wind energy compression device is internally provided with a wind turbine, and the speed of fluid entering the wind turbine is adjusted by adjusting the radial dimension of the middle section of the wind energy compression device; the wind turbine recovers fluid energy. On one hand, the wind turbine is driven to rotate by utilizing the air flow behind the wheel generated by the rotation of the wheel, so that the generator is driven to generate electric energy, and the electric energy is stored in the storage battery to realize energy recovery; on the other hand, the air flow flowing out of the air duct is utilized to lift the automobile head-on air flow, so that the contact area between the automobile head-on air flow and the front windshield is reduced, and the air resistance is reduced; finally, the endurance mileage of the automobile is improved, and the purposes of energy conservation and emission reduction are achieved.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a device for recovering energy behind an electric automobile wheel and a control method thereof.
Background
In the years, the conservation amount of electric vehicles in China rises year by year, but the defects of insufficient endurance and the like of the electric vehicles are increasingly prominent. The continuous voyage mileage of the electric automobile is improved, and the electric automobile becomes an important way for further popularization. Air resistance is one of the main driving resistances during driving of an automobile. Experiments show that when the vehicle speed exceeds 80km/h, the air resistance accounts for more than 50% of the total running resistance; when the vehicle speed exceeds 120km/h, the air resistance accounts for more than 80% of the total running resistance. Therefore, how to reduce the air resistance is a key factor for improving the cruising ability of the electric vehicle.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a device for recovering energy behind an electric automobile wheel and a control method thereof, which are used for recovering the energy behind the automobile wheel and converting the energy into electric energy; simultaneously, the air resistance is reduced; finally, the endurance mileage of the electric automobile is improved, and the purposes of energy conservation and emission reduction are achieved.
The present invention achieves the above technical object by the following means.
The electric automobile wheel rear energy recovery device comprises an air duct, a wind energy compression device and a wind turbine; the wind channel is internally provided with a wind energy compression device which is made of elastic materials; the wind energy compression device is internally provided with a wind turbine, and the speed of fluid entering the wind turbine is adjusted by adjusting the radial dimension of the middle section of the wind energy compression device; the wind turbine recovers fluid energy.
Furthermore, the outer side wall of the middle section of the wind energy compression device is surrounded with a wrapping band, and the electric winding device can tighten or loosen the wrapping band to adjust the radial size of the middle section of the wind energy compression device.
Further, two ends of a rotating shaft of the wind turbine are respectively arranged in the through hole A and the through hole B, the through hole A and the through hole B are arranged on the wind energy compression device, blades are arranged on the rotating shaft, the fluid drives the blades to rotate so as to drive the rotating shaft to rotate, and the rotating shaft is connected with an input shaft of the generator.
Further, install upper cover plate and lower apron on the pivot axle, upper cover plate and lower apron are cross structure, the blade includes lift type blade and resistance type blade, and wherein, lift type blade has four, sets up the tip between upper cover plate and lower apron along the axis of rotation axial direction, and resistance type blade has two, sets up in the axial direction of axis of rotation.
Further, a gas flow sensor A and a gas flow sensor B are arranged in the air duct, the gas flow sensor A is used for detecting the gas flow entering the air duct, the gas flow sensor B is used for detecting the gas flow flowing out of the air duct, and the gas flow sensor A and the gas flow sensor B transmit information to the ECU.
Further, the air duct is a tapered hollow pipeline.
Further, the air outlet end of the air duct is provided with a rotary blade, and the rotary blade is rotated by a motor so as to change the flowing direction of the outlet fluid.
Further, one end of the air duct is arranged at the rear position of the front wheel, and the other end of the air duct extends out of the front of the windshield.
The control method of the electric automobile wheel rear energy recovery device comprises the following steps:
the air flow behind the wheel generated by the rotation of the tire enters the air duct;
The wind turbine in the wind energy compression device recovers the energy of the fluid and then discharges the fluid through the air outlet of the air duct.
Specifically, during running of the automobile, the air flow behind the wheels generated by the rotation of the tires flows into the air duct through the air inlet, and the wind energy compression device is used for rectifying the air flow behind the wheels;
The air flow sensor A detects the air flow flowing into the air inlet and transmits detection information to the ECU, and the ECU judges whether the air flow rate entering the wind energy compression device reaches the starting speed of the wind turbine according to the detection information: if the air flow rate does not reach the starting speed, the ECU controls a furling motor in the electric furling device to tighten the furling belt, so that the cross section of the wind energy compression device is reduced to increase the air flow rate, and the air flow rate reaches the starting speed of the wind turbine;
when the air flow rate entering the wind energy compression device reaches the starting speed of the wind turbine, the lift type blade A, the lift type blade B, the lift type blade C, the lift type blade D, the resistance type blade A and the resistance type blade B of the wind turbine are driven to rotate by the air flow, and the rotating shaft drives the input shaft of the generator to rotate, so that the generator can generate electric energy;
when the air flow rate exceeds the starting speed of the wind turbine, the ECU controls a winding motor in the electric winding device to loosen the winding belt, so that the section of the wind energy compression device is enlarged, the air flow rate flowing through the wind turbine is increased, and the power generation efficiency of the wind turbine is improved;
The air flow flowing through the wind turbine continuously flows backwards along the air duct, and the air flow sensor B detects the air flow flowing through the air outlet and transmits detection information to the ECU;
The vehicle speed sensor detects the running speed of the vehicle and sends detection information to the ECU;
The ECU controls the rotation speed and the rotation direction of the motor in real time according to the air flow flowing through the air outlet and the real-time running speed of the automobile, so that the motor drives the blades to rotate clockwise or anticlockwise, and the air flowing out of the air outlet is changed.
The invention has the beneficial effects that:
According to the device for recovering the energy behind the wheels of the electric automobile, on one hand, the wind turbine is driven to rotate by utilizing the air flow behind the wheels generated by rotation of the wheels, so that the generator is driven to generate electric energy, and the electric energy is stored in the storage battery to realize energy recovery; on the other hand, the air flow flowing out of the air duct is utilized to lift the automobile head-on air flow, so that the contact area between the automobile head-on air flow and the front windshield is reduced, and the air resistance is reduced; finally, the endurance mileage of the automobile is improved, and the purposes of energy conservation and emission reduction are achieved.
Drawings
FIG. 1 is a schematic diagram of a wind tunnel;
FIG. 2 is a schematic structural view of a wind turbine;
FIG. 3 is a schematic view of a wind energy compression device;
FIG. 4 is a schematic diagram of an assembly of an air duct, a wind energy compression device, a wind turbine;
FIG. 5 is a schematic diagram of an assembly of an air duct, a wind turbine, and a vehicle;
FIG. 6 is a schematic diagram of the oncoming airflow flow direction without an electric vehicle wheel rear airflow energy recovery device installed;
FIG. 7 is a schematic diagram of the oncoming airflow flow direction when the airflow energy recovery device is installed after the electric vehicle wheels;
FIG. 8 is a schematic view of the structure of the upper cover plate;
FIG. 9 is a schematic view of a vane configuration at the outlet;
FIG. 10 is a schematic illustration of the connection of the retractor belt to the motorized retractor (the retractor belt is in tension);
fig. 11 is a schematic diagram of the connection of the retractor to the motorized retractor (the retractor is in a relaxed state).
The reference numerals are as follows:
The wind turbine comprises a 1-wind channel, a 2-air inlet, a 3-air outlet, a 4-wind energy compression device, a 5-through hole A, a 6-through hole B, a 7-wind turbine, an 8-rotating shaft, a 9-lifting type blade A, a 10-lifting type blade B, an 11-lifting type blade C, a 12-lifting type blade D, a 13-resistance type blade A, a 14-resistance type blade B, a 15-upper cover plate, a 16-lower cover plate, a 17-generator, a 181-gas flow sensor A, a 182-gas flow sensor B, a 19-ECU, a 20-electric retractor, a 201-retractor motor, a 21-retractor belt, a 22-rotating blade, a 23-motor and a 24-vehicle speed sensor.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 11, an electric vehicle wheel rear energy recovery device includes an air duct 1, an air inlet 2, an air outlet 3, a wind energy compression device 4, a through hole A5, a through hole B6, a wind turbine 7, a rotating shaft 8, a lift type blade A9, a lift type blade B10, a lift type blade C11, a lift type blade D12, a drag type blade a13, a drag type blade B14, an upper cover plate 15, a lower cover plate 16, a generator 17, a gas flow sensor a181, a gas flow sensor B182, an ECU19, an electric retractor 20, a retraction belt 21, a blade 22, a motor 23 and a vehicle speed sensor 24;
The air duct 1 is a variable-section hollow circular pipeline, two ends of the air duct are respectively provided with an air inlet 2 and an air outlet 3, the opening of the air inlet 2 is larger, and the opening of the air outlet 3 is smaller. The wind energy compression device 4 is positioned in the air duct 1 and is fixedly connected with the air duct 1. The wind energy compression device 4 is made of elastic materials and is a circular pipeline with large cross section at two ends and small cross section in the middle. The electric retractor 20 is installed on the inner wall of the air duct 1, the retraction belt 21 is annular, one end of the retraction belt is fixedly connected with the shell of the electric retractor 20, and the other end of the retraction belt is connected with the retraction motor 201 in the electric retractor 20. The wrapping band 21 surrounds and is in contact with the middle part of the wind energy compressing device 4. When the electric retractor 20 tightens or loosens the retractor 21, the length of the exposed length of the retractor 21 outside the retractor 20 can be changed, so that the length of the retractor 21 in contact with the wind energy compression device 4 is shortened or lengthened, and finally the section of the wind energy compression device 4 is variable.
The upper and lower ends of the wind energy compression device 4 are provided with a through hole A5 and a through hole B6. The wind turbine 7 is installed in the wind energy compression device 4, and comprises a rotating shaft 8, a lifting blade A9, a lifting blade B10, a lifting blade C11, a lifting blade D12, a resistance blade A13, a resistance blade B14, an upper cover plate 15 and a lower cover plate 16. The upper cover plate 15 and the lower cover plate 16 are identical in structure and symmetrically arranged. The rotating shaft 8 is a circular shaft, and is inserted into the through holes A5 and B6 in a clearance manner, and penetrates through the upper cover plate 15 and the lower cover plate 16. The rotating shaft 8 of the wind turbine is fixedly connected with the input shaft of the generator 17. The lift type blade A9 and the lift type blade C11 are symmetrically arranged, the lift type blade B10 and the lift type blade D12 are symmetrically arranged, and the resistance type blade A13 and the resistance type blade B14 are symmetrically arranged. The upper ends and the lower ends of the inner sides of the four lifting blades are fixedly connected with an upper cover plate 15 and a lower cover plate 16 respectively. The inner sides of the two resistance type blades are fixedly connected with the rotating shaft 8.
The generator 17 is connected to the vehicle battery through a wire harness, so that the power generated by the generator 17 is stored in the battery. The gas flow sensor a181 is mounted to the intake port 2 for detecting the flow rate of air flowing into the intake port 2 and transmitting the detection information to the ECU19. The gas flow sensor B182 is mounted to the gas outlet 3 for detecting the flow rate of the air flowing through the gas outlet 3 and transmitting the detection information to the ECU19.
The ECU19 judges whether the flow rate of the air entering the wind energy compressing device 4 reaches the start-up speed of the wind turbine 7 based on the detection information: if the air flow rate does not reach the starting speed, the ECU19 controls the electric retractor 20 to tighten the retraction belt 21, so that the cross section of the wind energy compression device 4 is reduced to increase the air flow rate, and the starting speed of the wind turbine 7 is reached; when the air flow rate exceeds the starting speed, the ECU19 controls the electric retractor 20 to loosen the retraction belt 21, so that the cross section of the wind energy compression device 4 is enlarged, the air flow rate flowing through the wind turbine 7 is increased, and the power generation efficiency of the wind turbine 7 is improved. The vanes 22 are located at the air outlet 3 and are rotatable radially around the air outlet 3. A motor 23 is connected to the rotation shaft of the blade 22 for rotating the blade 22. The rear side of the engine cover is provided with a through hole, and the air outlet 3 is positioned in the through hole.
During the running process of the automobile, the air outlet 3 discharges the air flowing through the air duct 1, the wind energy compression device 4 and the wind turbine 7 out of the automobile. A vehicle speed sensor 24 is mounted on the vehicle body for detecting the running speed of the vehicle and transmitting real-time vehicle speed information to the ECU19.
Specifically, the opening of the air inlet 2 is larger, and the opening of the air outlet 3 is smaller, so that the compressed wind energy and rectification function can be achieved.
Specifically, the wind turbine 7 is a lift-drag combined wind turbine, and has good starting performance and power generation efficiency.
Specifically, the generator 17 is a small permanent magnet alternating current generator, and the rotating speed matching performance is good.
Specifically, the blade of the wind turbine 7 is made of carbon fiber material, and has higher strength and lighter weight.
Specifically, according to the simulation result, when the inward normal direction of the intake port 2 is 120 ° from the forward running direction of the automobile, a large and stable air flow rate can be obtained.
In order to recover and store energy of airflow behind wheels in the running process of the automobile; reducing air resistance; the control method of the invention aims at improving the cruising ability of the automobile and comprises the following steps:
1) During running of the automobile, the air flow behind the wheels generated by the rotation of the tires flows into the air duct 1 through the air inlet 2, and the wind energy compression device 4 rectifies the air flow behind the wheels;
2) The air flow sensor a181 detects the air flow rate flowing into the air inlet 2 and transmits the detected information to the ECU19, and the ECU19 judges whether the air flow rate entering the wind energy compression device 4 reaches the start-up speed of the wind turbine 7 based on the detected information: if the air flow rate does not reach the starting speed, the ECU19 controls the winding motor 201 in the electric winding device 20 to tension the winding belt 21, so that the cross section of the wind energy compression device 4 is reduced to increase the air flow rate, and the air flow rate reaches the starting speed of the wind turbine 7;
3) When the air flow rate entering the wind energy compression device 4 reaches the starting speed of the wind turbine, the lift type blade A9, the lift type blade B10, the lift type blade C11, the lift type blade D12, the resistance type blade A13 and the resistance type blade B14 of the wind turbine 7 drive the rotating shaft 8 to rotate under the pushing of the air flow, and the rotating shaft 8 drives the input shaft of the generator 17 to rotate, so that the generator 17 generates electric energy;
4) When the air flow rate exceeds the starting speed of the wind turbine 7, the ECU19 controls the winding motor 201 in the electric winding device 20 to loosen the winding belt 21, so that the section of the wind energy compression device 4 is enlarged, the air flow rate flowing through the wind turbine 7 is increased, and the power generation efficiency of the wind turbine 7 is improved;
5) The generator 17 is connected with the automobile storage battery through a wire harness, and the power generated by the generator 17 is stored in the storage battery to realize energy recovery;
6) The air flow flowing through the wind turbine 7 continues to flow backwards along the air duct 1, and the air flow sensor B182 detects the air flow flowing through the air outlet 3 and transmits detection information to the ECU19;
7) The vehicle speed sensor 24 detects the running speed of the vehicle and sends detection information to the ECU19;
8) The ECU19 controls the rotation speed and the rotation direction of the motor 23 in real time according to the air flow passing through the air outlet 3 and the real-time running speed of the automobile, so that the motor drives the blades 22 to rotate clockwise or anticlockwise, and the air flow direction flowing out of the air outlet 3 is changed;
9) As shown in fig. 6, during the running process of the automobile, the head-on airflow of the automobile flows to the front windshield and contacts with the front windshield, so that larger air resistance is caused; as shown in fig. 7, in front of the front windshield of the automobile, the air flow flowing out from the air outlet 3 of the air duct 1 intersects with the head-on air flow of the automobile, and at this time, the air flow flowing out from the air outlet 3 lifts the head-on air flow, so that the contact area between the head-on air flow and the front windshield is reduced, the air resistance generated by the head-on air flow is reduced, the endurance mileage of the automobile is improved, and finally the purposes of energy conservation and emission reduction are achieved.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (6)
1. The device for recovering the energy behind the wheels of the electric automobile is characterized by comprising an air duct (1), a wind energy compression device (4) and a wind turbine (7); the wind channel (1) is internally provided with a wind energy compression device (4), and the wind energy compression device (4) is made of elastic materials; a wind turbine (7) is arranged in the wind energy compression device (4), and the speed of fluid entering the wind turbine (7) is adjusted by adjusting the radial dimension of the middle section of the wind energy compression device (4); the wind turbine (7) recovers fluid energy; the outer side wall of the middle section of the wind energy compression device (4) is surrounded by a binding belt (21), and the electric retractor (20) can tighten or loosen the binding belt (21) to adjust the radial size of the middle section of the wind energy compression device (4); a gas flow sensor A (181) and a gas flow sensor B (182) are arranged in the air duct (1), the gas flow sensor A (181) is used for detecting the gas flow entering the air duct (1), the gas flow sensor B (182) is used for detecting the gas flow exiting the air duct (1), and the gas flow sensor A (181) and the gas flow sensor B (182) transmit information to the ECU (19); the air outlet end of the air duct (1) is provided with a rotary blade (22), and the rotary blade (22) is rotated by a motor (23) so as to change the flow direction of outlet fluid; one end of the air duct (1) is arranged at the rear position of the front wheel, and the other end extends out of the front of the windshield.
2. The device for recovering energy behind an electric automobile wheel according to claim 1, wherein two ends of a rotating shaft (8) of the wind turbine (7) are respectively arranged in a through hole A (5) and a through hole B (6), the through hole A (5) and the through hole B (6) are arranged on the wind energy compression device (4), blades are arranged on the rotating shaft (8), the fluid drives the blades to rotate so as to drive the rotating shaft (8) to rotate, and the rotating shaft (8) is connected with an input shaft of a generator.
3. The electric vehicle wheel rear energy recovery device according to claim 2, wherein the rotating shaft (8) is provided with an upper cover plate (15) and a lower cover plate (16), the upper cover plate (15) and the lower cover plate (16) are in a cross-shaped structure, the blades include lift type blades and resistance type blades, wherein the lift type blades have four blades, the end portions of the lift type blades, which are arranged between the upper cover plate (15) and the lower cover plate (16) in the axial direction of the rotating shaft (8), are provided with two blades, and the resistance type blades are arranged in the axial direction of the rotating shaft (8).
4. The electric vehicle after-wheel energy recovery device according to claim 1, characterized in that the air duct (1) is a tapered hollow duct.
5. The control method of the electric-vehicle after-wheel energy recovery device according to any one of claims 1 to 4, characterized by comprising the steps of: the air flow behind the wheel generated by the rotation of the tire enters the air duct (1); the wind turbine (7) arranged in the wind energy compression device (4) is used for recovering the energy of the fluid and then discharging the fluid through the air outlet of the air duct (1).
6. The control method of the electric-automobile rear-wheel energy recovery apparatus according to claim 5, characterized by comprising the steps of:
During running of the automobile, the air flow behind the wheels generated by the rotation of the tires flows into the air duct (1) through the air inlet (2), and the wind energy compression device (4) is used for rectifying the air flow behind the wheels;
The air flow sensor A (181) detects the air flow flowing into the air inlet (2) and transmits detection information to the ECU (19), and the ECU (19) judges whether the air flow rate entering the wind energy compression device (4) reaches the starting speed of the wind turbine (7) according to the detection information: if the air flow rate does not reach the starting speed, the ECU (19) controls a winding motor (201) in the electric winding device (20) to tighten a winding belt (21) so that the cross section of the wind energy compression device (4) is reduced to increase the air flow rate, and the air flow rate reaches the starting speed of the wind turbine (7);
When the air flow rate entering the wind energy compression device (4) reaches the starting speed of the wind turbine, a lift type blade A (9), a lift type blade B (10), a lift type blade C (11), a lift type blade D (12), a resistance type blade A (13) and a resistance type blade B (14) of the wind turbine (7) are driven by airflow to rotate, and the rotating shaft (8) drives an input shaft of a generator (17) to rotate, so that the generator (17) can generate electric energy;
When the air flow rate exceeds the starting speed of the wind turbine (7), the ECU (19) controls a winding motor (201) in the electric winding device (20) to loosen a winding belt (21) so that the section of the wind energy compression device (4) is enlarged, and therefore the air flow rate flowing through the wind turbine (7) is increased, and the power generation efficiency of the wind turbine (7) is improved;
The air flow flowing through the wind turbine (7) continues to flow backwards along the air duct (1), the air flow sensor B (182) detects the air flow flowing through the air outlet (3) and transmits detection information to the ECU (19);
a vehicle speed sensor (24) detects the running speed of the vehicle and sends detection information to the ECU (19);
The ECU (19) controls the rotation speed and the rotation direction of the motor (23) in real time according to the air flow flowing through the air outlet (3) and the real-time running speed of the automobile, so that the motor drives the rotary blade (22) to rotate clockwise or anticlockwise, and the air flowing out of the air outlet (3) is changed.
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| CN114183308A (en) | 2022-03-15 |
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