CN114183308A - 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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- CN114183308A CN114183308A CN202111341908.5A CN202111341908A CN114183308A CN 114183308 A CN114183308 A CN 114183308A CN 202111341908 A CN202111341908 A CN 202111341908A CN 114183308 A CN114183308 A CN 114183308A
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- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000006835 compression Effects 0.000 claims abstract description 46
- 238000007906 compression Methods 0.000 claims abstract description 46
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 13
- 238000010248 power generation Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010276 construction 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
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- 238000004088 simulation Methods 0.000 description 1
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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 rear wheel energy recovery device of an electric automobile and a control method thereof, relating to the field of automobiles.A wind energy compression device is arranged in an air duct and is made of elastic materials; a wind turbine is installed in the wind energy compression device, and the speed of fluid entering the wind turbine is adjusted by adjusting the radial size 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 the airflow generated by the rotation of the wheels behind 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.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a rear wheel energy recovery device of an electric automobile and a control method thereof.
Background
In recent years, the conservation quantity of electric automobiles in China is increased year by year, but the defects of insufficient cruising ability and the like of the electric automobiles are increasingly highlighted. The endurance mileage of the electric automobile is improved, and the electric automobile becomes an important way for further popularization of the electric automobile. Air resistance is one of the main driving resistances during the 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 driving 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 endurance of the electric automobile.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an electric automobile rear wheel energy recovery device and a control method thereof, which are used for recovering the rear wheel energy of an automobile and converting the rear wheel energy into electric energy; meanwhile, 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-described object by the following technical means.
A rear wheel energy recovery device of an electric automobile comprises an air duct, a wind energy compression device and a wind machine; the wind energy compression device is arranged in the air duct and is made of elastic materials; a wind turbine is installed in the wind energy compression device, and the speed of fluid entering the wind turbine is adjusted by adjusting the radial size of the middle section of the wind energy compression device; the wind turbine recovers fluid energy.
Furthermore, a winding belt is wound on the outer side wall of the middle section of the wind energy compression device, and the electric retractor is tightened or loosened to adjust the radial size of the middle section of the wind energy compression device.
Furthermore, two ends of a rotating shaft of the wind turbine are respectively installed in the through hole A and the through hole B, the through hole A and the through hole B are formed in the wind energy compression device, blades are installed on the rotating shaft, the blades are driven by the fluid 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, the epaxial upper cover plate and the lower apron of installing of pivot, upper cover plate and lower apron are the cruciform 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 on the axis of rotation axial direction, and resistance type blade has two, sets up on 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.
Furthermore, the air outlet end of the air duct is provided with a rotating blade, and the rotating blade is rotated by a motor so as to change the flowing direction of the outlet fluid.
Furthermore, one end of the air duct is arranged behind 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 rear wheel energy recovery device comprises the following steps:
the rear wheel airflow generated by the rotation of the tire enters the air duct;
fluid energy is recovered by a wind turbine arranged in the wind energy compression device and then is discharged through an air outlet of the air duct.
Specifically, during the running of the automobile, the air flow behind the wheel generated by the rotation of the tire flows into the air duct through the air inlet, and the wind energy compression device is used for rectifying the air flow behind the wheel;
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 entering the wind energy compression device reaches the starting speed of the wind turbine or not according to the detection information: if the air flow rate does not reach the starting speed, the ECU controls a winding motor in the electric retractor to tighten a winding belt, so that the section of the wind energy compression device is reduced, the air flow rate is increased, 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 lifting force type blades A, the lifting force type blades B, the lifting force type blades C, the lifting force type blades D, the resistance type blades A and the resistance type blades B of the wind turbine drive the rotating shaft to rotate under the pushing of the airflow, and the rotating shaft drives the input shaft of the generator to rotate, so that the generator generates 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 passing through the wind turbine is increased, and the power generation efficiency of the wind turbine is improved;
the airflow flowing through the wind machine continuously flows backwards along the air duct, and the air flow sensor B detects the airflow flowing through the air outlet and transmits the detection information to the ECU;
the vehicle speed sensor detects the running speed of the vehicle and sends the detection information to the ECU;
the ECU controls the rotating speed and the rotating direction of the motor in real time according to the air flow passing 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:
on one hand, the invention provides a device for recovering energy at the rear of a wheel of an electric automobile, and on the other hand, the device utilizes the airflow at the rear of the wheel generated by the rotation of the wheel to drive a wind turbine to rotate so as to drive a generator to generate electric energy, and the electric energy is stored in a 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 structural view of an air duct;
FIG. 2 is a schematic view of a wind turbine;
FIG. 3 is a schematic structural diagram of a wind energy compressing device;
FIG. 4 is an assembly view of the wind tunnel, wind energy compressing device, and wind turbine;
FIG. 5 is a schematic view of an assembly of the wind tunnel, wind turbine and vehicle;
FIG. 6 is a schematic diagram of the flow direction of the head-on airflow when the rear airflow energy recovery device of the electric vehicle is not installed;
FIG. 7 is a schematic diagram of the flow direction of the head-on airflow when the airflow energy recovery device is installed behind the wheels of the electric vehicle;
FIG. 8 is a schematic structural view of the upper cover plate;
FIG. 9 is a schematic view of the construction of the vanes at the air outlet;
FIG. 10 is a schematic view of the connection of the belt retractor to the motorized retractor (the belt retractor is under tension);
fig. 11 is a schematic view of the connection of the belt retractor and the motorized retractor (the belt retractor in a relaxed state).
The reference numbers are as follows:
1-air duct, 2-air inlet, 3-air outlet, 4-wind energy compression device, 5-through hole A, 6-through hole B, 7-wind turbine, 8-rotating shaft, 9-lift type blade A, 10-lift type blade B, 11-lift type blade C, 12-lift type blade D, 13-resistance type blade A, 14-resistance type blade B, 15-upper cover plate, 16-lower cover plate, 17-generator, 181-gas flow sensor A, 182-gas flow sensor B, 19-ECU, 20-electric retractor, 201-retractor motor, 21-retractor belt, 22-rotating blade, 23-motor and 24-vehicle speed sensor.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 11, an electric vehicle rear wheel 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, an air flow sensor a181, an air flow sensor B182, an ECU19, an electric retractor 20, a retractor belt 21, a blade 22, a motor 23, and a vehicle speed sensor 24;
the air duct 1 is a hollow circular pipeline with a variable cross section, the 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 material and is a circular pipeline with large cross sections at two ends and small cross section at the middle. The electric retractor 20 is installed on the inner wall of the air duct 1, the belt retracting belt 21 is annular, one end of the belt retracting belt is fixedly connected with the outer shell of the electric retractor 20, and the other end of the belt retracting belt is connected with a retracting motor 201 in the electric retractor 20. The wind energy compressing device 4 is surrounded by the wind energy collecting belt 21 and is in contact with the wind energy compressing device. When the electric retractor 20 tightens or loosens the wind energy compression device 21, the exposed length of the wind energy compression device 21 outside the retractor 23 can be changed, so that the contact length of the wind energy compression device 4 and the wind energy compression device 21 is shortened or lengthened, and finally the variable cross section of the wind energy compression device 4 is realized.
The upper end and the lower end 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 includes 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, and a lower cover plate 16. The upper cover plate 15 and the lower cover plate 16 are identical in structure and are symmetrically arranged. The rotating shaft 8 is a circular shaft, and is inserted into the through hole a5 and the through hole B6 with clearance, and penetrates 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 drag type blade A13 and the drag type blade B14 are symmetrically arranged. The upper ends and the lower ends of the inner sides of the four lifting force type blades are respectively fixedly connected with an upper cover plate 15 and a lower cover plate 16. The inner sides of the two resistance type blades are fixedly connected with the rotating shaft 8.
The generator 17 is connected to a vehicle battery via a harness, so that the electric energy generated by the generator 17 is stored in the battery. A gas flow rate 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 ECU 19. A gas flow sensor B182 is mounted to the air outlet 3 for detecting the flow rate of air flowing through the air outlet 3 and transmitting the detection information to the ECU 19.
The ECU19 determines whether the flow rate of air entering the wind energy compressing 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 ECU19 controls the electric retractor 20 to tighten the wind-energy compressing device 4 to reduce the section of the wind-energy compressing device 21 so as to increase the air flow rate and further reach the starting speed of the wind turbine 7; when the airflow speed exceeds the starting speed, the ECU19 controls the electric retractor 20 to loosen the retracting belt 21, so that the section of the wind energy compressing device 4 is enlarged, the airflow 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 gas outlet 3 and are capable of rotating about the radial direction of the gas outlet 3. A motor 23 is connected to a rotation shaft of the blade 22 for rotating the blade 22. A through hole is opened at the rear side of the engine cover, and the air outlet 3 is positioned in the through hole.
In 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. The vehicle speed sensor 24 is mounted on the vehicle body for detecting the traveling speed of the vehicle and transmitting real-time vehicle speed information to the ECU 19.
Specifically, the opening of the air inlet 2 is large, and the opening of the air outlet 3 is small, so that the functions of compressing wind energy and rectifying 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 alternator with good speed matching performance.
Specifically, the blades of the wind turbine 7 are made of carbon fiber materials, and have high strength and light weight.
Specifically, according to the simulation result, when the inward normal direction of the intake port 2 is 120 ° from the forward traveling direction of the automobile, a large and stable air flow rate can be obtained.
In order to recover and store the energy of the airflow behind the wheels when the automobile runs; the air resistance is reduced; the control method of the invention has the following steps:
1) when the automobile runs, the air flow behind the wheel generated by the rotation of the tire flows into the air duct 1 through the air inlet 2, and the air flow behind the wheel is rectified by the wind energy compression device 4;
2) the air flow sensor a181 detects the air flow rate flowing into the air inlet 2 and transmits the detection information to the ECU19, and the ECU19 determines whether the flow rate of air entering the wind energy compressing device 4 reaches the start speed of the wind turbine 7 according to the detection information: if the air flow rate does not reach the starting speed, the ECU19 controls the winding motor 201 in the electric retractor 20 to tighten the winding belt 21, so that the section of the wind energy compression device 4 becomes smaller 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 push 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 airflow speed exceeds the starting speed of the wind turbine 7, the ECU19 controls the retraction motor 201 in the electric retractor 20 to loosen the retraction strap 21, so that the section of the wind energy compression device 4 is enlarged, the airflow 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 an automobile storage battery through a wire harness, and the generated energy of the generator 17 is stored in the storage battery to realize energy recovery;
6) the airflow flowing through the wind turbine 7 continues to flow backwards along the air duct 1, and the airflow sensor B182 detects the airflow flowing through the air outlet 3 and transmits the detection information to the ECU 19;
7) the vehicle speed sensor 24 detects the running speed of the vehicle and sends the detection information to the ECU 19;
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 to change the flow direction of the air flowing out of the air outlet 3;
9) as shown in fig. 6, during the driving of the automobile, the front air flow of the automobile flows to the front windshield of the automobile and contacts with the front windshield of the automobile, which causes a large air resistance; as shown in fig. 7, in front of the front windshield of the automobile, the air flow flowing out of the air outlet 3 of the air duct 1 intersects with the automobile head-on air flow, and at this time, the air flow flowing out of 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 cruising range of the automobile is increased, and the purposes of energy conservation and emission reduction are finally achieved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (10)
1. The device for recovering 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 machine (7); a wind energy compression device (4) is arranged in the air duct (1), and the wind energy compression device (4) is made of elastic materials; a wind turbine (7) is installed in the wind energy compression device (4), and the fluid entering the wind turbine (7) is adjusted by adjusting the radial size of the middle section of the wind energy compression device (4); the wind turbine (7) recovers fluid energy.
2. The electric automobile rear wheel energy recovery device according to claim 1, characterized in that a belt (21) is wound on the outer side wall of the middle section of the wind energy compression device (4), and the electric retractor (20) can tighten or loosen the belt (21) to adjust the radial dimension of the middle section of the wind energy compression device (4).
3. The electric automobile wheel rear energy recovery device according to claim 1, characterized in that both ends of the rotating shaft (8) of the wind turbine (7) are respectively installed in the through hole A (5) and the through hole B (6), the through hole A (5) and the through hole B (6) are opened on the wind energy compression device (4), the rotating shaft (8) is provided with blades, the blades are driven by fluid to rotate so as to drive the rotating shaft (8) to rotate, and the rotating shaft (8) is connected with the input shaft of the generator.
4. The rear wheel energy recovery device of an electric vehicle according to claim 3, 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) have a cross-shaped structure, and the blades include a lift type blade and a drag type blade, wherein the lift type blade has four pieces and is provided at an end portion between the upper cover plate (15) and the lower cover plate (16) in the axial direction of the rotating shaft (8), and the drag type blade has two pieces and is provided in the axial direction of the rotating shaft (8).
5. The electric vehicle rear-wheel energy recovery device according to claim 1, characterized in that a gas flow sensor A (181) and a gas flow sensor B (182) are provided in the air duct (1), the gas flow sensor A (181) is used for detecting the flow of gas into the air duct (1), the gas flow sensor B (182) is used for detecting the flow of gas out of the air duct (1), and the gas flow sensor A (181) and the gas flow sensor B (182) transmit information to the ECU (19).
6. Electric vehicle rear-wheel energy recovery device according to claim 1, characterized in that said air duct (1) is a tapered hollow duct.
7. The rear wheel energy recovery device of an electric vehicle according to claim 1, characterized in that the air outlet end of the air duct (1) is provided with a rotating blade (22), and the rotating blade (22) is rotated by a motor (23) to change the outlet fluid flow direction.
8. The rear wheel energy recovery device of an electric vehicle according to claim 1, wherein the air duct (1) is provided at one end at a position behind the front wheel and extends out of the front of the windshield at the other end.
9. The control method of an electric vehicle rear-wheel energy recovery apparatus according to any one of claims 1 to 8, characterized by comprising the steps of:
the air flow behind the wheel generated by the rotation of the tire enters the air duct (1);
fluid energy is recovered by a wind turbine (7) arranged in the wind energy compression device (4) and then is discharged from an air outlet of the air duct (1).
10. The control method of an electric vehicle rear-wheel energy recovery apparatus according to claim 9, characterized by comprising the steps of:
when the automobile runs, the air flow behind the wheel generated by the rotation of the tire 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 wheel;
the gas flow sensor A (181) detects the air flow flowing into the air inlet (2) and transmits the 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) or not 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 retractor (20) to tighten a winding belt (21) so that the 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 force type blade A (9), a lift force type blade B (10), a lift force type blade C (11), a lift force type blade D (12) and a resistance type blade A (13) of the wind turbine (7) drive a rotating shaft (8) to rotate under the pushing of the air flow, and the rotating shaft (8) drives an input shaft of a generator (17) to rotate, so that the generator (17) generates electric energy;
when the airflow speed 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 the winding belt (21), so that the section of the wind energy compression device (4) is enlarged, the airflow flowing through the wind turbine (7) is increased, and the power generation efficiency of the wind turbine (7) is improved;
the airflow flowing through the wind turbine (7) continuously flows backwards along the air duct (1), and the airflow sensor B (182) detects the airflow flowing through the air outlet (3) and transmits the detection information to the ECU (19);
a vehicle speed sensor (24) detects the running speed of the vehicle and sends the detection information to an ECU (19);
the ECU (19) controls the rotating speed and the rotating 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 flowing out of the air outlet (3) is changed.
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| KR102676564B1 (en) * | 2022-07-20 | 2024-06-19 | 주식회사 에스엘테크 | Wind Generator Module connected to ventilation pipe |
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| CN114183308B (en) | 2024-05-14 |
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