CN110435778A - Increase the vehicle of lower pressure - Google Patents
Increase the vehicle of lower pressure Download PDFInfo
- Publication number
- CN110435778A CN110435778A CN201910804542.7A CN201910804542A CN110435778A CN 110435778 A CN110435778 A CN 110435778A CN 201910804542 A CN201910804542 A CN 201910804542A CN 110435778 A CN110435778 A CN 110435778A
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- China
- Prior art keywords
- vehicle
- channel
- vehicle body
- pressure
- passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000883990 Flabellum Species 0.000 claims description 22
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 229910001069 Ti alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 241001075561 Fioria Species 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002365 multiple layer Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D37/00—Stabilising vehicle bodies without controlling suspension arrangements
- B62D37/02—Stabilising vehicle bodies without controlling suspension arrangements by aerodynamic means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of vehicle of pressure under increase, comprising: vehicle body；And pressure increase device；The pressure increase device includes: first passage, and one end of the first passage is arranged in the vehicle body bottom；Second channel, one end of the second channel connect the other end of the first passage；Third channel, one end of the third channel connects the other end of the second channel, and the top of the vehicle body is arranged in the other end of the third channel；When the vehicle moves forward, the air of the vehicle body bottom is drained to the top of the vehicle body by the first passage, the second channel and the third channel.The air of vehicle bottom is drained into the top of vehicle when vehicle is advanced forward by vehicle provided by the present application.While reducing the air pressure of vehicle bottom, the air pressure of vehicle roof is increased, to increase the draught head of vehicle roof and bottom, and then achievees the purpose that push on vehicle.
Description
Technical field
This application involves traffic and transport fields, and in particular to the vehicle of pressure under a kind of increase.
Background technique
Vehicle needs downward pressure in motion.Downward pressure, the frictional force between wheel and ground are caused using air-flow
Increase, stability gets a promotion.Under this state, vehicle turning when the centrifugal force upper limit also accordingly increase, excessively curved speed limit with
Promotion.However, the weight for relying solely on vehicle itself increases lower pressure, lower pressure ten increased in this way in existing vehicle
Divide limited.
Summary of the invention
The main purpose of the application is to provide a kind of vehicle of pressure under increase, comprising: vehicle body；And pressure increase
Device；The pressure increase device includes: first passage, and one end of the first passage is arranged in the vehicle body bottom；
Second channel, one end of the second channel connect the other end of the first passage；Third channel, the one of the third channel
End connects the other end of the second channel, and the top of the vehicle body is arranged in the other end of the third channel；When
When the vehicle moves forward, the air of the vehicle body bottom passes through the first passage, the second channel and described
Third channel is drained to the top of the vehicle body.
Optionally, the other end of the third channel is located at the tail portion of the vehicle body.
Optionally, the vehicle body is equipped with through-hole, and one end of the through-hole is located at the vehicle body bottom, described
The other end of through-hole is located at the top of the vehicle body, the first passage, the second channel and the third channel position
In in the through-hole.
Optionally, the pressure increase device further include:
Vane motor is located in the first passage, the second channel and the third channel.
Optionally, the vane motor includes:
Engine shaft；
Low pressure flabellum group is arranged on the engine shaft, and is located in the first passage；
High pressure flabellum group is arranged on the engine shaft, and is located in the second channel, and connects the low pressure fan
Leaf group；
Power blade group is arranged on the engine shaft, and is located in the third channel, and connects the high pressure fan
Leaf group；
It is equipped with combustion zone between the engine shaft and the inner wall of the through-hole, and on the inner wall of the through-hole, is located at
Position between the high pressure flabellum group and the power blade group is equipped with fuel nozzle and igniter.
Optionally, the pressure increase device further include: one end of the through-hole is arranged in filter device.
Optionally, the left side of the lower surface of the vehicle body and right side are with the central axis of the vehicle body at axis
Symmetrically.
Optionally, the through-hole and ground are at 30 degree of angles.
Optionally, the left and right side of the lower surface of the vehicle body is bonded with ground.
Optionally, the length of the first passage is 400 millimeters, and internal diameter is 302 millimeters；The length of the second channel is
600 millimeters, internal diameter is 202 millimeters；The length of the third channel is 600 millimeters, and internal diameter is 252 millimeters.
The air of vehicle bottom is drained into the top of vehicle when vehicle is advanced forward by vehicle provided by the present application.It reduces
While the air pressure of vehicle bottom, the air pressure of vehicle roof is increased, so that the draught head of vehicle roof and bottom is increased, into
And achieve the purpose that push on vehicle.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present application, so that the application's is other
Feature, objects and advantages become more apparent upon.The illustrative examples attached drawing and its explanation of the application is for explaining the application, not
Constitute the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the lateral parts schematic diagram of the vehicle of pressure under the increase according to one embodiment of the application；
Fig. 2 is the front schematic view of the vehicle of pressure under the increase according to one embodiment of the application.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
In addition, term " installation ", " setting ", " being equipped with ", " connection ", " connected ", " socket " shall be understood in a broad sense.For example,
It may be a fixed connection, be detachably connected or monolithic construction；It can be mechanical connection, or electrical connection；It can be direct phase
It even, or indirectly connected through an intermediary, or is two connections internal between device, element or component.
For those of ordinary skills, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, this application involves the vehicles of pressure under a kind of 1. increases, comprising: vehicle body 1 and pressure increase dress
It sets.The pressure increase device includes: first passage 2, second channel 3 and third channel 4.One end of the first passage 2 is set
It sets in 1 bottom of vehicle body；One end of second channel 3 connects the other end of the first passage 2；The one of third channel 4
End connects the other end of the second channel 3, and the top of the vehicle body 1 is arranged in the other end of the third channel 4.
When the vehicle moves forward, the air of the vehicle body bottom passes through the first passage, the second channel and institute
State the top that third channel is drained to the vehicle body.In the present embodiment, first passage 2, second channel 3 and third channel
4 can be setting except vehicle body, but be not limited thereto.Those skilled in the art can according to actual needs, by
One channel 2, second channel 3 and third channel 4 across a part of vehicle body or run through entire vehicle in whole or in part
Ontology belongs in the application range claimed.
By Bernoulli's theorem it is recognised that the faster pressure of fluid flow rate is smaller, therefore the method for reducing vehicle spirit pressure is to make
Air velocity is faster than the air velocity of vehicle upper area between vehicle and ground.
And to manufacture more downward power, it is necessary to the difference of the air pressure between the air pressure and vehicle and ground of vehicle upper area
It is big as far as possible.Air pressure is usually constant above vehicle, therefore keeps air pressure between vehicle and ground small as far as possible.Cause is thus between vehicle and ground
Air pressure is smaller, and the difference of the air pressure between the air pressure and vehicle and ground of vehicle upper area is bigger, and the downward power that vehicle is subject to is bigger.
In the application, when vehicle is advanced forward, the air of vehicle bottom is drained into the top of vehicle.Reduce vehicle bottom
Air pressure while, increase the air pressure of vehicle roof, to increase the draught head of vehicle roof and bottom, and then reach by
The purpose that vehicle pushes.
In one embodiment of the application, the other end of third channel 4 is located at the tail portion of the vehicle body.It can increase in this way
The lower pressure in tailing portion, while ensure that the smooth circulation of air-flow.
In one embodiment of the application, the vehicle body is equipped with through-hole 5, and one end of the through-hole 5 is located at the vehicle
1 bottom of ontology, the other end of the through-hole 5 are located at the top of the vehicle body 1, the first passage 2, described second logical
Road 3 and the third channel 4 are located in the through-hole.
Although the increase of frictional ground force keeps road holding stronger, this force of rolling friction belongs to resistance, then just anticipating
Taste there is the acting of more power to do work for offset resistance.And the air after accelerating will affect the air-flow in other paths, increase vehicle
Tail resistance.To control forever small as far as possible when resistance is Automobile Design, resistance means that more greatly total work is smaller, it is meant that power
Loss.Therefore, in one embodiment of the application, the pressure increase device further include: vane motor 6 is located at described the
In one channel 2, the second channel 3 and the third channel 4.There is dynamic property while being capable of increasing automobile downward power
Matter can provide the additional power in addition to engine in running for automobile and offset resistance caused by downward power.
In one embodiment of the application, the vane motor 6 includes: engine shaft 61, low pressure flabellum group 62, high pressure fan
Leaf group 63 and power blade group 64.Wherein, low pressure flabellum group 62 is arranged on the engine shaft 61, and it is logical to be located at described first
In road 2；High pressure flabellum group 63 is arranged on the engine shaft 61, and is located in the second channel 3, and connect the low pressure
Flabellum group 62；Power blade group 64 is arranged on the engine shaft 61, and is located in the third channel 4, and described in connection
63 flabellum group of high pressure.Combustion zone 65 is equipped between the engine shaft 61 and the inner wall of the through-hole 5, and in the through-hole 5
On inner wall, the position between the high pressure flabellum group 63 and the power blade group 64 is equipped with fuel nozzle 66 and igniter
67。
In the present embodiment, three flabellum groups are made of five 20 equal paddle flabellums respectively, pass through a connected pathways
Axis connection.Low pressure flabellum diameter 300mm, high pressure flabellum diameter 200mm, power blade diameter 250mm, flabellum thickness are
50mm.But it is not limited thereto, the quantity and diameter of flabellum group flabellum can be arranged in those skilled in the art according to actual needs.
When engine start, vehicle bottom air will be taken out by low pressure high pressure flabellum group and the air that pressurizes is supplied as oxidant
Burning, combustion zone spray ignited fuel.The power that burning generates will push the rotation of power blade group, and drive front end by axis
The rotation of low pressure high-pressure fan group, continues to be evacuated.According to the third law of Ethiopia gram newton, high temperature and high speed gas that channel sprays by
To thrust and automobile by thrust caused by this device be etc. big reversed.This -150 ° power is decomposed, according to flat
Row quadrilateral rule, when this power is decomposed into horizontal direction thrust and vertical direction downward power, horizontal thrust and numerical value are downward
The ratio of power is 3:1..Thus can reduce vehicle base pressure it is strong while the second power resources as automobile.
In the present embodiment, blade, axis material be nickel-base alloy.Because its physical property is prominent, temperature spectral limit is wide, and
With high-yield strength, highly anti-fatigue intensity and high limit tensile strength, corrosion-resistant resistance to oxidation can be kept in hot environment
Property.Such nickel-bass alloy material, Ni accounting 50%~75%, Cr accounting is 15%~25%, but is not limited thereto.
In the present embodiment, conduit wall, connector material be titanium alloy.Because of low heat transfer possessed by titanium alloy, resistance to height
Temperature equal more stable physical property and chemical property so that titanium alloy material have high strength-weight ratio, it is good it is resistance, every
Sound and outstanding corrosion resistance, and intensity is able to maintain constant under high temperature environment, is better than the ceramic material to become fragile under high temperature
Material is better than heat labile polymer material, is better than other metal materials.Such titanium alloy material, Ti accounting 93% to 95%, AL
Accounting 5% to 7%.But it is not limited thereto.
In one embodiment of the application, the cockpit inner surface of vehicle should be equipped with a kind of noise reduction layer.It is fabric, fabric
It is put into after drying in the NH4H2PO4 that concentration is 5% and continues 45min, be placed in preliminary oxidation in 250-350 DEG C of isoperibol, so
It is placed in 1000 DEG C of oxygen-free environments and is carbonized again afterwards, finally with cooling after steam activation 10min, such material is in high and low frequency ring
Border is preferable to wave absorption ability.
In one embodiment of the application, the pressure increase device further include: the one of the through-hole is arranged in filter device
End.It is pure that gas is able to maintain simultaneously in air inlet, filters sandstone.In the present embodiment, filter device includes that setting is logical first
The multiple filtration net of 2 front end of road, the active carbon layer composition for the stainless steel metal fabric web and multiple-layer stacked that hole successively reduces.
But it is not limited thereto.
Referring to figure 2., in one embodiment of the application, the left side 11 of the lower surface of the vehicle body 1 and right side
12 with the central axis 13 of the vehicle body at axial symmetry.
In one embodiment of the application, the through-hole and ground are at 30 degree of angles.
In one embodiment of the application, the left and right side of the lower surface of the vehicle body is bonded with ground.
Vehicle bottom and axis parallel direction are in symmetrical arc, and intermediate high two sides are low.Vehicle is less than at a distance from ground
100mm, or even be bonded with ground.It so can replace side skirt, achieve the effect that obstruct side air.
In one embodiment of the application, the length of the first passage is 400 millimeters, and internal diameter is 302 millimeters；Described second
The length in channel is 600 millimeters, and internal diameter is 202 millimeters；The length of the third channel is 600 millimeters, and internal diameter is 252 millimeters.
The air of vehicle bottom is drained into the top of vehicle when vehicle is advanced forward by vehicle provided by the present application.It reduces
While the air pressure of vehicle bottom, the air pressure of vehicle roof is increased, so that the draught head of vehicle roof and bottom is increased, into
And achieve the purpose that push on vehicle.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. the vehicle of pressure under a kind of increase characterized by comprising
Vehicle body；And
Pressure increase device；
The pressure increase device includes:
One end of first passage, the first passage is arranged in the vehicle body bottom；
Second channel, one end of the second channel connect the other end of the first passage；
Third channel, one end of the third channel connects the other end of the second channel, and the third channel is another
The top of the vehicle body is arranged in end；
When the vehicle moves forward, the air of the vehicle body bottom passes through the first passage, the second channel
And the third channel is drained to the top of the vehicle body.
2. the vehicle of pressure under increase according to claim 1, which is characterized in that the other end of the third channel is located at
The tail portion of the vehicle body.
3. the vehicle of pressure under increase according to claim 1, which is characterized in that the vehicle body is equipped with through-hole,
One end of the through-hole is located at the vehicle body bottom, and the other end of the through-hole is located at the top of the vehicle body, institute
First passage, the second channel and the third channel is stated to be located in the through-hole.
4. the vehicle of pressure under increase according to claim 1, which is characterized in that the pressure increase device further include:
Vane motor is located in the first passage, the second channel and the third channel.
5. the vehicle of pressure under increase according to claim 1, which is characterized in that the vane motor includes:
Engine shaft；
Low pressure flabellum group is arranged on the engine shaft, and is located in the first passage；
High pressure flabellum group is arranged on the engine shaft, and is located in the second channel, and connect the low pressure flabellum
Group；
Power blade group is arranged on the engine shaft, and is located in the third channel, and connect the high pressure flabellum
Group；
It is equipped with combustion zone between the engine shaft and the inner wall of the through-hole, and on the inner wall of the through-hole, is located at described
Position between high pressure flabellum group and the power blade group is equipped with fuel nozzle and igniter.
6. the vehicle of pressure under increase according to claim 1, which is characterized in that the pressure increase device further include:
One end of the through-hole is arranged in filter device.
7. the vehicle of pressure under increase according to claim 1, which is characterized in that a left side for the lower surface of the vehicle body
Half portion and right side are with the central axis of the vehicle body at axial symmetry.
8. the vehicle of pressure under increase according to claim 1, which is characterized in that the through-hole and ground are pressed from both sides at 30 degree
Angle.
9. the vehicle of pressure under increase according to claim 1, which is characterized in that a left side for the lower surface of the vehicle body
Side and right side are bonded with ground.
10. the vehicle of pressure under increase according to claim 1, which is characterized in that the length of the first passage is 400
Millimeter, internal diameter are 302 millimeters；The length of the second channel is 600 millimeters, and internal diameter is 202 millimeters；The length of the third channel
Degree is 600 millimeters, and internal diameter is 252 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910804542.7A CN110435778A (en) | 2019-08-28 | 2019-08-28 | Increase the vehicle of lower pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910804542.7A CN110435778A (en) | 2019-08-28 | 2019-08-28 | Increase the vehicle of lower pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110435778A true CN110435778A (en) | 2019-11-12 |
Family
ID=68438122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910804542.7A Pending CN110435778A (en) | 2019-08-28 | 2019-08-28 | Increase the vehicle of lower pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110435778A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113492936A (en) * | 2021-08-02 | 2021-10-12 | 天津大学 | Trolley with air injection auxiliary power mechanism and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9314583D0 (en) * | 1992-07-28 | 1993-08-25 | Meclaren Cars N V | Improvements in or relating to ground effect road vehicles |
| ATA143097A (en) * | 1992-06-11 | 1998-06-15 | Wolfgang Robert Lehner | FLOW-EFFICIENT VEHICLE |
| JP2005170304A (en) * | 2003-12-12 | 2005-06-30 | Toyota Motor Corp | Device for improving aerodynamic characteristics of vehicles |
| CN104477257A (en) * | 2014-12-11 | 2015-04-01 | 刘磊 | Automobile wind stabilizing device |
| CN108216393A (en) * | 2016-12-15 | 2018-06-29 | 通用汽车环球科技运作有限责任公司 | For the lower pressing creation pipeline of vehicle |
| CN211519691U (en) * | 2019-08-28 | 2020-09-18 | 皮宗麟 | Vehicle with increased down force |
-
2019
- 2019-08-28 CN CN201910804542.7A patent/CN110435778A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATA143097A (en) * | 1992-06-11 | 1998-06-15 | Wolfgang Robert Lehner | FLOW-EFFICIENT VEHICLE |
| GB9314583D0 (en) * | 1992-07-28 | 1993-08-25 | Meclaren Cars N V | Improvements in or relating to ground effect road vehicles |
| JP2005170304A (en) * | 2003-12-12 | 2005-06-30 | Toyota Motor Corp | Device for improving aerodynamic characteristics of vehicles |
| CN104477257A (en) * | 2014-12-11 | 2015-04-01 | 刘磊 | Automobile wind stabilizing device |
| CN108216393A (en) * | 2016-12-15 | 2018-06-29 | 通用汽车环球科技运作有限责任公司 | For the lower pressing creation pipeline of vehicle |
| CN211519691U (en) * | 2019-08-28 | 2020-09-18 | 皮宗麟 | Vehicle with increased down force |
Non-Patent Citations (1)
| Title |
|---|
| 贝尔尼·麦克艾萨克: "燃气涡轮推进系统", 31 December 2014, pages: 1 - 4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113492936A (en) * | 2021-08-02 | 2021-10-12 | 天津大学 | Trolley with air injection auxiliary power mechanism and control method thereof |
| CN113492936B (en) * | 2021-08-02 | 2023-03-14 | 天津大学 | Trolley with air injection auxiliary power mechanism and control method thereof |
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