CN112297828A - Control system for reducing air resistance by using vehicle tail gas - Google Patents
Control system for reducing air resistance by using vehicle tail gas Download PDFInfo
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- CN112297828A CN112297828A CN201910682592.2A CN201910682592A CN112297828A CN 112297828 A CN112297828 A CN 112297828A CN 201910682592 A CN201910682592 A CN 201910682592A CN 112297828 A CN112297828 A CN 112297828A
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- pipeline
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- resistance
- drag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
Abstract
The invention relates to a control system for reducing air resistance by utilizing vehicle tail gas, which comprises a vehicle speed detection device, a vehicle speed detection device and a control device, wherein the vehicle speed detection device is used for measuring the speed of a vehicle in the advancing process; the anti-drag exhaust device comprises a first pipeline, a second pipeline, an anti-drag exhaust port structure, a valve assembly and an air pump assembly, wherein the side wall of the first pipeline is communicated with the second pipeline, one end of the first pipeline is communicated with the anti-drag exhaust port structure, the first pipeline is used for communicating vehicle exhaust, the valve assembly and the air pump assembly are arranged in the second pipeline at intervals, and the air pump assembly can exhaust the extracted outside air through the anti-drag exhaust port structure after passing through the second pipeline and the first pipeline; and the controller is respectively in electric signal connection with the vehicle speed detection device, the valve assembly and the air pump assembly and is used for controlling the opening and closing of the valve assembly and the air pump assembly according to the received speed. Automatic drag reduction control and full utilization of vehicle tail gas are realized.
Description
Technical Field
The invention relates to the technical field of automobile aerodynamics, in particular to a control system for reducing air resistance by utilizing vehicle tail gas.
Background
The air resistance refers to the resistance of air to a moving object, and is generated by the elastic force of air on the moving object. When automobiles, ships, railway locomotives and the like are operated, resistance is caused by the friction between the surfaces of both sides and the air due to the compression of the air in the front and the partial vacuum in the space behind the tail.
When present vehicle is gone at a high speed, can form very strong vortex of pulling in car back windshield both sides, also can form great separation vortex at the roof trailing edge, this will form very big air resistance, the air resistance is overcome to the vehicle in-process of traveling, increases the oil consumption of vehicle in-process of traveling, produces a large amount of tail gases, has very high heat energy and kinetic energy in these tail gases, and most energy is taken away by tail gas through exhaust duct, releases in the air, causes very big energy waste.
At present, drag reduction effect is realized by adding spoilers on the rear edge of the roof and two sides of a rear windshield to control drag vortex, but the spoilers are abrupt in shape and not attractive in appearance; the control method is fixed and inflexible, different controls cannot be provided according to the wind resistance, and the resistance reduction effect needs to be improved.
Disclosure of Invention
The invention aims to solve the technical problems that automatic drag reduction control cannot be realized and the tail gas of a vehicle cannot be fully utilized.
In order to solve the technical problem, the invention discloses a control system for reducing air resistance by utilizing vehicle tail gas, which comprises a vehicle speed detection device, a resistance-reducing exhaust device and a controller,
the vehicle speed detection device is used for measuring the speed of the vehicle in the process of running;
the anti-drag exhaust device comprises a first pipeline, a second pipeline, an anti-drag exhaust port structure, a valve assembly and an air pump assembly, wherein the side wall of the first pipeline is communicated with the second pipeline, one end of the first pipeline is communicated with the anti-drag exhaust port structure, the first pipeline is used for communicating tail gas of a vehicle, the valve assembly and the air pump assembly are arranged in the second pipeline at intervals, when the valve assembly is opened, a passage between the first pipeline and the second pipeline is communicated, when the valve assembly is closed, the passage between the first pipeline and the second pipeline is disconnected, and the air pump assembly can exhaust extracted outside air through the second pipeline and the first pipeline and then through the anti-drag exhaust port structure;
and the controller is respectively in electric signal connection with the vehicle speed detection device, the valve assembly and the air pump assembly, and is used for controlling the opening and closing of the valve assembly and the air pump assembly according to the received speed and the rotating speed of an air pump in the air pump assembly.
Preferably, a vehicle speed reference value is set in the controller, the vehicle speed detection device transmits the detected actual vehicle speed of the vehicle to the controller, and the controller judges the magnitude relation between the actual vehicle speed and the vehicle speed reference value to control the opening and closing of the valve assembly and the air pump assembly.
Preferably, at least two resistance-reducing exhaust port structures are arranged on the edge of the vehicle body around the rear windshield of the automobile.
Preferably, the drag reduction vent structure is elongate.
Preferably, a grille is arranged at each of the resistance-reducing air outlet structures.
Preferably, the inner wall of the air outlet of the anti-drag air outlet structure is a slope structure from inside to outside.
Preferably, the first pipeline comprises a tail gas exhaust pipeline and a public pipeline, a first end of the public pipeline is communicated with the anti-drag exhaust port structure, a second end of the public pipeline is communicated with the tail gas exhaust pipe, and a third end of the public pipeline is communicated with the second pipeline.
Preferably, the exhaust gas pipeline and the public pipeline are of an integrated structure.
Preferably, the exhaust gas pipeline and the public pipeline are of detachable structures.
Preferably, a buffering arc-shaped structure is arranged between the public pipeline and the drag reduction air outlet structure, and the arc-shaped structure is communicated with the public pipeline and the drag reduction air outlet structure.
By adopting the technical scheme, the invention has the following beneficial effects:
and the controller is respectively in electric signal connection with the vehicle speed detection device, the valve assembly and the air pump assembly, and is used for controlling the opening and closing of the valve assembly and the air pump assembly according to the received speed. The invention mixes the vehicle tail gas with the separated airflow and the dragging vortex at the tail vortex mainly through the vehicle tail gas and air, delays the airflow separation phenomenon and the dragging vortex low-pressure high-resistance phenomenon, and achieves the effect of automatically controlling and fully utilizing the vehicle tail gas by the controller.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a control system for reducing air resistance using vehicle exhaust according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of a drag reduction and venting apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the distribution of the structure of the drag reduction vent on the vehicle according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a drag reduction and exhaust device with a buffer structure according to an embodiment of the present invention;
the following is a supplementary description of the drawings:
1-vehicle speed detection means; 2-a controller; 3-a drag reduction exhaust apparatus; 31-a drag reducing vent structure; 32-a second pipeline; 33-a first pipeline; 34-a valve assembly; 35-an air pump assembly; 321-a common conduit; 322-exhaust of tail gas pipeline; 36-buffer structure.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. 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. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
A control system for reducing air resistance by using vehicle tail gas is characterized in that: comprises a vehicle speed detection device 1, a resistance-reducing exhaust device 3 and a controller 2,
the vehicle speed detection device 1 is used for measuring the speed of the vehicle in the process of running;
the anti-drag exhaust device 3 comprises a first pipeline 33, a second pipeline 32, an anti-drag exhaust port structure 31, a valve assembly 34 and an air pump assembly 35, wherein the side wall of the first pipeline 33 is communicated with the second pipeline 32, one end of the first pipeline 33 is communicated with the anti-drag exhaust port structure 31, the first pipeline 33 is used for communicating vehicle exhaust, the valve assembly 34 and the air pump assembly 35 are arranged in the second pipeline 32 at intervals, and when the valve assembly 34 is opened, the air pump assembly 35 can enable the extracted outside air to pass through the second pipeline 32 and the first pipeline 33 and then the anti-drag exhaust port structure 31 is exhausted.
The controller 2 is electrically connected with the vehicle speed detection device 1, the valve assembly 34 and the air pump assembly 35 respectively, and the controller 2 is used for controlling the opening and closing of the valve assembly 34 and the air pump assembly 35 according to the received speed and the rotating speed of an air pump in the air pump assembly 35;
when the valve assembly 34 and the air pump assembly 35 are opened, the tail gas is discharged from the anti-drag vent structure 31 through the first pipeline 33 by the kinetic energy of the tail gas, and simultaneously, the air pump assembly 35 discharges the sucked outside air from the anti-drag vent structure 31 through the second pipeline 32 and the first pipeline 33;
when the valve assembly 34 and the air pump assembly 35 are closed, the tail gas is discharged from the anti-drag exhaust port structure 31 through the first pipeline 33 by the kinetic energy of the tail gas.
The invention mixes the vehicle tail gas with the separated airflow and the dragging vortex at the tail vortex mainly through the vehicle tail gas and air, delays the airflow separation phenomenon, reduces the low-pressure high-resistance phenomenon of the dragging vortex, and achieves the effect of automatically controlling and fully utilizing the vehicle tail gas by the controller 2. Meanwhile, the tail gas and the air can be discharged through the resistance-reducing exhaust port structure 31, so that the lift force is reduced, the down force is increased, and the stability of vehicle operation is enhanced. The controller 2 is used for controlling the opening and closing of the valve assembly 34 and the air pump assembly 35 according to the received speed, and the rotating speed of an air pump in the air pump assembly 35 is controlled, so that different air exhaust speeds are realized; simulation verifies that when the wind resistance coefficient of the vehicle adopting the control system for reducing the air resistance by utilizing the vehicle exhaust is 0.624, when the vehicle runs at a speed V0 of 100kph, the width D of the resistance-reducing exhaust port structure 31 is 10mm, and the exhaust speed V is 15m/s, the wind resistance coefficient of the vehicle is reduced by 34 counts, 0.001 is 1 Count, the reduction amplitude is 10%, and the resistance-reducing effect is obvious.
In some embodiments, as shown in fig. 2, a control system for reducing air resistance using vehicle exhaust gas includes a vehicle speed detecting device 1, a faired exhaust 3 and a controller 2,
the vehicle speed detection device 1 is used for measuring the speed of the vehicle in the process of running;
the anti-drag exhaust device 3 comprises an exhaust gas pipeline 322, a second pipeline 32, a common pipeline 321, an anti-drag exhaust port structure 31, a valve assembly 34 and an air pump assembly 35,
a first end of the common pipeline 321 is communicated with the anti-drag exhaust port structure 31, a second end of the common pipeline 321 is communicated with the tail pipe, and a third end of the common pipeline 321 is communicated with the second pipeline 32; the exhaust gas pipeline 322 is communicated with an exhaust system of the vehicle, so that high-temperature gas generated by combustion of the automobile engine, namely exhaust gas, flows through the exhaust system and then flows through the exhaust gas pipeline 322; the common pipe 321 and the tail pipe are of an integrated structure or a detachable structure, but not limited thereto;
a first passage is formed among the exhaust gas pipeline 322, the common pipeline and the anti-drag exhaust port structure 31, and is used for discharging vehicle exhaust gas through the anti-drag exhaust port structure 31 through the first passage to destroy vortex so as to reduce the wind resistance of the automobile; high-temperature gas generated by combustion of an automobile engine, namely tail gas, flows through an exhaust system of an automobile and is exhausted from the resistance-reducing exhaust port structure 31, and after the tail gas is mixed with separated air flow at the tail vortex of the automobile, the phenomenon of air flow separation can be delayed, the strength and the size of the tail vortex of the automobile are reduced, so that pressure difference resistance is reduced, further pneumatic resistance of the automobile is reduced, and energy conservation and consumption reduction are realized.
A second passage is formed among the second pipeline 32, the common pipeline 321 and the anti-drag air vent structure 31, and is used for discharging the outside air pumped by the air pump assembly 35 through the anti-drag air vent structure 31 through the first passage.
A valve assembly 34 and an air pump assembly 35 are arranged in the air vent pipeline at intervals, and when the valve assembly 34 and the air pump assembly 35 are opened, air sucked by the air pump passes through the second pipeline 32 and the common pipeline and then is exhausted through the anti-drag air outlet structure 31; preferably, the valve assembly 34 is arranged at the junction of the second pipeline 32 and the common pipeline 321;
the controller 2 is electrically connected with the vehicle speed detection device 1, the valve assembly 34 and the air pump assembly 35 respectively, and the controller 2 is used for controlling the opening and closing of the valve assembly 34 and the air pump assembly 35 according to the received speed;
when the valve assembly 34 and the air pump assembly 35 are opened, the tail gas is discharged from the anti-drag vent structure 31 through the first pipeline 33 by the kinetic energy of the tail gas, and simultaneously, the air pump assembly 35 discharges the sucked outside air from the anti-drag vent structure 31 through the second pipeline 32 and the first pipeline 33;
when the valve assembly 34 and the air pump assembly 35 are closed, the tail gas is discharged from the anti-drag exhaust port structure 31 through the first pipeline 33 by the self kinetic energy;
data statistics in a simulation study show that as shown in table 1 below, the rear windshield and the rear tail are larger than the aerodynamic resistance of the front wheel and the rear wheel, and the entire tail resistance (the rear windshield, the rear tail and the departure angle) is almost 50% of the entire vehicle resistance, wherein the rear windshield resistance accounts for 25% of the entire vehicle resistance.
TABLE 1
Therefore, in some embodiments, at least two resistance-reducing exhaust port structures 31 are disposed at the vehicle body edges around the rear windshield of the vehicle, in one embodiment, as shown in fig. 2, the two resistance-reducing exhaust port structures 31 are respectively disposed at the left and right vehicle body edges of the rear windshield of the vehicle, and the resistance-reducing exhaust port structures 31 are elongated and extend along the length direction of the vehicle body edges, so that when the resistance-reducing exhaust port structures are disposed at the left and right vehicle body edges corresponding to the rear windshield of the vehicle, vehicle exhaust gas is mixed with dragging vortexes, thereby reducing the low-pressure high-resistance phenomenon of airflow dragging vortexes.
The aerodynamic resistance of each part of the tail part of the vehicle and the wheels under the optimal working condition is counted, and the aerodynamic resistance of each important part of the vehicle body under the working condition with the resistance-reducing exhaust device 3 is counted in a table 2.
TABLE 2
Compared with the original model, the air resistance of each part under the jet flow working condition is reduced. The change situation of the aerodynamic resistance is as follows: (1) the wind resistance of the rear wind window is reduced by 16N; (2) the wind resistance of the tail of the vehicle is reduced by 10N; (3) the wind resistance of the departure angle is reduced by 4N; (4) the wind resistance of the front wheel is reduced by 7N; (5) the wind resistance of the rear wheels is reduced by 6N. It can be seen that the air resistance at the rear louver decreases by a relatively large amount.
The resistance-reducing exhaust port structures 31 are arranged on the two sides of the rear windshield for blowing, the low-pressure high-resistance state of the original flow field can be effectively destroyed, the tail gas flow separation is reduced, the tail vortex is weakened, the negative pressure at the rear windshield is improved to a great extent (namely the negative pressure is increased), the pressure integral along the surface of the vehicle body is greatly reduced, and the pressure difference resistance is reduced.
In some embodiments, a grating is disposed at each of the resistance-reducing gas outlet structures 31, and the amount of gas discharged from each position can be different by designing gratings with different sizes, so as to achieve reasonable distribution of the gas discharge amount of the resistance-reducing gas outlet structures 31.
In some embodiments, the inner wall of the air outlet of the anti-drag air outlet structure 31 is a slope structure from inside to outside, so as to increase the diffusion area for exhausting air, so that the vehicle exhaust is rapidly mixed with the separated air flow and the dragging vortex at the wake vortex, thereby delaying the air flow separation phenomenon and reducing the low-pressure high-resistance phenomenon of the dragging vortex.
In some embodiments, referring to fig. 4, a buffer structure 36 is disposed between the common pipe 321 and the anti-drag gas vent structure 31, the arc structure communicates the common pipe 321 and the anti-drag gas vent structure 31, and the side surface of the buffer structure 36 may be arc.
In some embodiments, a vehicle speed reference value is set in the controller 2, the vehicle speed detection device 1 transmits the detected actual vehicle speed of the vehicle to the controller 2, the controller 2 determines a magnitude relationship between the actual vehicle speed and the vehicle speed reference value, when the actual vehicle speed is lower than the vehicle speed reference value, the first valve assembly 34 is closed, the exhaust gas in the exhaust gas discharge pipeline 322 enters the common pipeline 321 by self-kinetic energy, the exhaust gas is discharged through the drag reduction jet orifice, and when the actual vehicle speed is not lower than the vehicle speed reference value, the first valve assembly 34 is opened, on one hand, the exhaust gas in the exhaust gas discharge pipeline 322 enters the common pipeline 321 by self-kinetic energy, the exhaust gas is discharged through the drag reduction jet orifice, on the other hand, the air pump in the second pipeline 32 sucks outside air, enters the common pipeline 321 through the air pipeline, so that air is discharged out of the tail gas through the resistance-reducing jet ports; further, in an embodiment, the air pump assembly 35 includes an air pump and an air pump speed controller 2, and the air pump speed controller 2 can control the speed of sucking the outside air through the air pump air suction port, the speed of releasing the air through the air discharge port, and the frequency of sucking and discharging the air according to the vehicle speed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A control system for reducing air resistance by using vehicle tail gas is characterized in that: comprises a vehicle speed detection device, a resistance-reducing exhaust device and a controller,
the vehicle speed detection device is used for measuring the speed of the vehicle in the process of running;
the anti-drag exhaust device comprises a first pipeline, a second pipeline, an anti-drag exhaust port structure, a valve assembly and an air pump assembly, wherein the side wall of the first pipeline is communicated with the second pipeline, one end of the first pipeline is communicated with the anti-drag exhaust port structure, the first pipeline is used for communicating tail gas of a vehicle, the valve assembly and the air pump assembly are arranged in the second pipeline at intervals, when the valve assembly is opened, a passage between the first pipeline and the second pipeline is communicated, when the valve assembly is closed, the passage between the first pipeline and the second pipeline is disconnected, and the air pump assembly can exhaust extracted outside air through the second pipeline and the first pipeline and then through the anti-drag exhaust port structure;
and the controller is respectively in electric signal connection with the vehicle speed detection device, the valve assembly and the air pump assembly, and is used for controlling the opening and closing of the valve assembly and the air pump assembly and the rotating speed of an air pump in the air pump assembly according to the received speed.
2. The control system for reducing air resistance using vehicle exhaust according to claim 1, wherein: the controller is internally provided with a vehicle speed reference value, the vehicle speed detection device transmits the detected actual vehicle speed of the vehicle to the controller, and the controller judges the magnitude relation between the actual vehicle speed and the vehicle speed reference value to control the opening and closing of the valve assembly and the air pump assembly.
3. The control system for reducing air resistance using vehicle exhaust according to claim 1, wherein: at least two resistance-reducing exhaust port structures are arranged on the edge of the automobile body around the rear windshield of the automobile.
4. The control system for reducing air resistance using vehicle exhaust according to claim 1, wherein: the resistance-reducing exhaust port structure is long and narrow.
5. The control system for reducing air resistance using vehicle exhaust according to claim 4, wherein: and a grid is arranged at each resistance-reducing air outlet structure.
6. The control system for reducing air resistance using vehicle exhaust according to claim 4, wherein: the inner wall of the air outlet of the anti-drag air outlet structure is of an inclined surface structure from inside to outside.
7. The control system for reducing air resistance using vehicle exhaust according to claim 1, wherein: the first pipeline comprises a tail gas exhaust pipeline and a public pipeline, a first end of the public pipeline is communicated with the anti-drag exhaust port structure, a second end of the public pipeline is communicated with the tail gas exhaust pipe, and a third end of the public pipeline is communicated with the second pipeline.
8. The control system for reducing air resistance using vehicle exhaust according to claim 7, wherein: the exhaust gas pipeline and the public pipeline are of an integrated structure.
9. The control system for reducing air resistance using vehicle exhaust according to claim 7, wherein: the tail gas exhaust pipeline and the public pipeline are of detachable structures.
10. The control system for reducing air resistance using vehicle exhaust according to claim 7, wherein: the public pipeline with there is a buffer structure between the drag reduction gas vent structure, the arc structure intercommunication public pipeline with drag reduction gas vent structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910682592.2A CN112297828A (en) | 2019-07-26 | 2019-07-26 | Control system for reducing air resistance by using vehicle tail gas |
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| CN201910682592.2A CN112297828A (en) | 2019-07-26 | 2019-07-26 | Control system for reducing air resistance by using vehicle tail gas |
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| CN201910682592.2A Pending CN112297828A (en) | 2019-07-26 | 2019-07-26 | Control system for reducing air resistance by using vehicle tail gas |
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| US20030193216A1 (en) * | 2001-08-23 | 2003-10-16 | Fairburn Douglas S. | Air channeler for reducing wind resistance and method of use |
| CN1530250A (en) * | 2003-03-16 | 2004-09-22 | 骁 李 | Vehicle tail gas exhausting resistance reducting scheme |
| CN201276012Y (en) * | 2008-06-27 | 2009-07-22 | 任思春 | Air conduction type energy-saving device for reducing resistance and temperature of rear engine coach |
| CN107627835A (en) * | 2017-09-07 | 2018-01-26 | 清华大学苏州汽车研究院（相城） | A kind of method and gas emission device for reducing automobile resistance |
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2019
- 2019-07-26 CN CN201910682592.2A patent/CN112297828A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030193216A1 (en) * | 2001-08-23 | 2003-10-16 | Fairburn Douglas S. | Air channeler for reducing wind resistance and method of use |
| CN1530250A (en) * | 2003-03-16 | 2004-09-22 | 骁 李 | Vehicle tail gas exhausting resistance reducting scheme |
| CN201276012Y (en) * | 2008-06-27 | 2009-07-22 | 任思春 | Air conduction type energy-saving device for reducing resistance and temperature of rear engine coach |
| CN107627835A (en) * | 2017-09-07 | 2018-01-26 | 清华大学苏州汽车研究院（相城） | A kind of method and gas emission device for reducing automobile resistance |
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Application publication date: 20210202 |