CN109795565A - A kind of automobile and its drop windage device - Google Patents

Abstract

The present invention discloses a kind of automobile and its drop windage device, wherein, the drop windage device includes air supply part and runner, and the entrance of the runner is connected with the air outlet of air supply part, and the gas of the outlet discharge of runner can form air curtain compatible with the shell of automobile in the outside of the wheel；It further include controller, controller is connect with air supply part signal, and can change the output power of air supply part according to the travel speed of automobile.The drop windage device of automobile provided by the present invention is formed by air curtain for the primary air attachment in front of car body, primary air is avoided to disperse；Flow-disturbing, wheel hub flow-disturbing in encircleing can also be isolated in the air curtain, to reduce the two to interference caused by the primary air for flowing through vehicle body, vehicle body side flow field is kept to stablize；Controller can adjust the output power of air supply part according to the travel speed of automobile, generate the air curtain with proper strength, to realize the purpose for actively reducing windage according to different driving cycles.

Description

A kind of automobile and its drop windage device

Technical field

The present invention relates to automotive aerodynamics technical field more particularly to a kind of automobile and its drop windage devices.

Background technique

In vehicle aerodynamic design field, the design of contour of the vehicle and lower body turbulator member at present more at It is ripe, by continuing to optimize to contour of the vehicle and lower body turbulator member, vehicle can be made to obtain preferable vehicle air dynamic Mechanical property, and then reduce the resistance in vehicle travel process.

However, the improvement of above-mentioned contour of the vehicle, lower body turbulator member belongs to the improvement of passive type, vehicle can not be made During actual travel, active accommodation is carried out for different driving cycles, dynamically to improve the aerodynamic characteristic of vehicle.

For above situation, a kind of active air-inlet grille that can actively reduce windage exists in the prior art, is set to hair The front in motivation cabin is mainly used for the air inlet and heat dissipation of engine.When car speed higher (it is generally necessary to reaching 60km/h), And engine it is cooling without additional air when, which can be closed, to reduce the air resistance coefficient of vehicle, then be mentioned Rise the stability and fuel economy of vehicle.

But in fact, vehicle is in the process of running, the temperature in enging cabin is usually relatively high, especially in sweltering heat Summer, above-mentioned active air-inlet grille are constantly in full-gear substantially, that is to say, that the active air-inlet grille is in the most of the time It can not all play the role of reducing windage.

Therefore, how a kind of device that can actively reduce windage according to different driving cycles is provided, is still the skill of this field Art personnel technical problem urgently to be resolved.

Summary of the invention

The object of the present invention is to provide a kind of automobile and its drop windage devices, which can be according to different driving works Condition actively reduces windage.

In order to solve the above technical problems, the present invention provides a kind of drop windage device of automobile, including air supply part and runner, The entrance of the runner is connected with the air outlet of the air supply part, and the gas of the outlet discharge of the runner can be in the wheel Outside forms air curtain compatible with the shell of the automobile；It further include controller, the controller and the air supply part are believed Number connection, and can change the output power of the air supply part according to the travel speed of the automobile.

The drop windage device of automobile provided by the present invention, is matched by proprietary air supply part, runner, so that vehicle The outside of wheel can form air curtain compatible with automobile case, flow to the arch between wheel and wheel cover when air-flow attaches automobile case When region, air-flow will not disperse because fixed wall attachment is lacked, and be attached to the air curtain and gradually move to car body rear It is dynamic.

In this way, the air-flow stagnation pressure of vehicle body side is able to maintain at one during the entire process of air-flow flows through vehicle body side Higher level, and close to far field stagnation pressure, the static pressure of tail of the body can also obtain a degree of promotion, and then substantially subtract Resistance in small vehicle travel process.

In addition, the air curtain can carry out wheel hub flow-disturbing caused by flow-disturbing in the arch between wheel and wheel cover, hub for vehicle wheel Isolation allows the flow field of vehicle body side more stable to reduce the two to interference caused by the primary air for flowing through vehicle body, It is more advantageous to the reduction of automobile running resistance.

More importantly drop windage device provided by the present invention also has controller, which can be according to automobile Travel speed adjust air supply part output power, generate have proper strength air curtain, be preferably isolated encircle in flow-disturbing, The influence of wheel hub flow-disturbing, and then realize the purpose that windage is actively reduced according to different driving cycles.

Optionally, the outlet is set to the outer end of the wheel cover of the wheel, and is located at the front of the wheel.

Optionally, the outlet is that slit-shaped exports, and the width of slit-shaped outlet is 5-10mm.

Optionally, further include drainage plate, the drainage plate is provided close to the shell of the automobile of the wheel, and with institute It states shell and is enclosed drainage lumens；Drainage lumens described in the outlet enter the drainage from the gas of the outlet discharge Chamber, and be discharged by the drainage lumens, to form the air curtain.

Optionally, the interior walls be smooth transition of the runner.

Optionally, several flow distribution plates along the runner extending direction are equipped in the runner.

Optionally, the air inlet of the air supply part is equipped with switch valve block；It further include driving part, the driving part It is electrically connected with the switch valve block, and the switch valve plate movement can be driven, to adjust the aperture of the air inlet.

Optionally, the air inlet is additionally provided with filter element, to filter the gas for entering the air supply part.

Optionally, the air supply part is centrifugal fan.

The present invention also provides a kind of automobiles, the drop windage device including above-mentioned automobile.

Since the drop windage device of above-mentioned automobile has had technical effect as above, then, there is the drop windage device Automobile also when having similar technical effect, therefore this will not be repeated here.

Detailed description of the invention

Fig. 1 is the Flow Field Distribution schematic diagram near the wheel of automobile in the prior art；

Fig. 2 is a kind of structural schematic diagram of specific embodiment of the drop windage device of automobile provided by the present invention；

Fig. 3 is the Flow Field Distribution schematic diagram used near a kind of wheel of automobile for dropping windage device provided by the present invention；

Fig. 4 is the setting structure schematic diagram that the runner exit of windage device is dropped in Fig. 3；

Fig. 5 is the Flow Field Distribution signal near the wheel using the automobile of another drop windage device provided by the present invention Figure；

Fig. 6 is the flow of the air supply part of drop windage device provided by the present invention and the relational graph of automobile driving speed；

Fig. 7 is that drop windage device provided by the present invention implements the air resistance coefficient variation of front and back vehicle and power is saved situation and shown It is intended to.

The reference numerals are as follows in Fig. 1-7:

1 air supply part, 11 air inlets, 2 runners, 21 outlets, 3 wheels, 4 wheel covers, 5 switch valve blocks, 6 filter elements, outside 7 Shell, 8 drainage plates；

A air curtain, B drainage lumens, M mainstream, X encircle interior flow-disturbing, Y wheel hub flow-disturbing.

Specific embodiment

It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution of the present invention Applying example, the present invention is described in further detail.

It is described herein it is " several " be that exponential quantity is uncertain multiple, it is usually more than two.

Referring to FIG. 1, Fig. 1 is the Flow Field Distribution schematic diagram near the wheel of automobile in the prior art.

As shown in Figure 1, the arch area in vehicle operation, due to the high speed rotation of wheel 3, between wheel 3 and wheel cover 4 High velocity turbulent flow state can be presented in interior air-flow (flow-disturbing X in hereinafter referred to as encircleing)；And the air-flow for vehicle, in front of car body (hereinafter referred to as mainstream M) is then to be attached at the shell 7 of car body gradually to the flowing of car body rear.

By taking the flow field of near front wheels as an example, mainstream M is attached at front bumper, preceding guarantor's covering first, then arrives at the arch Region, due to not having wall surface attachment, mainstream M can be considered as high-speed jet, and in the lateral surface of wheel 3, mainstream M can be with flow-disturbing in arch X generates collision, friction, and then momentum transmitting occurs, and leads to total drops of mainstream M, and flow-disturbing X is due to for turbulence-like in encircleing State can be dissipated to quickly from mainstream M momentum obtained.

In this way, the fluid stagnation pressure when mainstream M reaches vehicle body side shell 7 by the arch area, near vehicle body Decline larger, the level of far field stagnation pressure is much not achieved, the static pressure that finally will affect tail of the body restores, and leads to vehicle driving Resistance in the process is larger.

Simultaneously as the wheel rim of wheel 3 is usually the aluminium alloy spoke with certain moulding and aperture, substantially it is rendered as The pyramidal structure that ecto-entad radial dimension is gradually reduced, when rotating at high speed, wheel rim can also generate the air-flow of surrounding certain Driving force, formed and with mainstream M flow to substantially vertical wheel hub flow-disturbing Y, this largely can also destroy mainstream M and flow Directionality so that near vehicle body side air-flow flowing become more disorder, be unfavorable for the decline of running resistance.

For this purpose, the embodiment of the present invention provides a kind of drop windage device of automobile, it can be outside the formation of the outside of wheel 3 and car body The compatible air curtain A of shell 7, and then completely cut off and encircle interior flow-disturbing X, influence of the wheel hub flow-disturbing Y to mainstream M.

Fig. 2-6 is specifically please referred to, Fig. 2 is a kind of specific embodiment of the drop windage device of automobile provided by the present invention Structural schematic diagram, Fig. 3 are the Flow Field Distribution signal used near a kind of wheel of automobile for dropping windage device provided by the present invention Figure, Fig. 4 are the setting structure schematic diagram that the runner exit of windage device is dropped in Fig. 3, and Fig. 5 is to use another kind provided by the present invention Flow Field Distribution schematic diagram near the wheel of the automobile of windage device drops, and Fig. 6 is the gas supply of drop windage device provided by the present invention The flow of component and the relational graph of automobile driving speed.

As shown in Fig. 2, the present invention provides a kind of drop windage device of automobile, including air supply part 1 and runner 2, the runner 2 Entrance be connected with the air outlet of air supply part 1, the outlet 21 of runner 2 is set near the wheel 3 of automobile, and from 21 discharge of outlet Gas can form air curtain A compatible with the shell 7 of automobile in the outside of the wheel 3.

It is to be appreciated that the outside of above-mentioned wheel 3 refers to side of the wheel 3 far from vehicle body, it is reflected in attached drawing 2 and is Refer to the downside of wheel 3；Using Fig. 3 as visual angle, the shell 7 of automobile usually there will be arc notch at wheel 3, and above-mentioned air curtain A is real It being equivalent to be the gaseous state shell being arranged at the arc notch on border, the junction of the gaseous state shell and shell 7 seamlessly transits, And it is moulded consistent with vehicle body, so that the mainstream M in front of car body is attached at shell 7 to the movement of vehicle body rear When, can successfully achieve and be attached at air curtain A, it is then gradually mobile to vehicle body rear, this be also exactly " above-mentioned air curtain A with Shell 7 is adapted " real meaning.

By taking front-wheel as an example, and Fig. 3 is referred to, using the above structure, when mainstream M is attached at front bumper, preceding guarantor's covering, flowing When to arch area between wheel 3 and wheel cover 4, above-mentioned air curtain A can be used as the attachment wall surface of mainstream M, and mainstream M will not be because lacking Lack wall surface attachment and disperse, but is attached at air curtain A and is gradually moved to vehicle body rear.

In this way, the air-flow stagnation pressure of vehicle body side is able to maintain higher at one during the entire process of mainstream M flows through vehicle body Level, and close to far field stagnation pressure, the static pressure of tail of the body can also obtain a degree of promotion, and then substantially reduce vehicle Resistance in driving process.

Mainstream M and flow-disturbing X, wheel hub flow-disturbing Y in arch can also be isolated by above-mentioned air curtain A, so that flow-disturbing X, wheel hub in encircleing Flow-disturbing Y cannot have an impact the flow direction of mainstream M, and the flow field of vehicle body side can be more stable, be more advantageous to garage Sail the reduction of resistance.

But it should know, in the actual moving process of automobile, with the variation of travel speed, flow-disturbing X, wheel in above-mentioned arch The state of hub flow-disturbing Y, intensity also can difference, correspondingly, for be isolated encircle in flow-disturbing X, wheel hub flow-disturbing Y air curtain A it is strong Degree is also required to different.

In view of this, the drop windage device of the provided automobile of the embodiment of the present invention further includes controller (not shown), it should Controller is connect with 1 signal of air supply part, and can change the output power of air supply part 1 according to the travel speed of vehicle, raw At the air curtain A with proper strength, encircle interior flow-disturbing X, influence of the wheel hub flow-disturbing Y to mainstream M to be preferably isolated, to realize root The purpose of windage is actively reduced according to different driving cycles.

Meanwhile can also optimize the output power of air supply part 1 by the controller, unnecessary power dissipation is avoided, into And substantially save the power energy consumption of air supply part 1.

It may be noted that the corresponding relationship between 1 output power of air supply part and travel speed will receive the vehicle of automobile, stream The influence of the flow resistance, the setting many factors such as position and size of outlet 21 in road 2, so, the embodiment of the present invention is not right It does specific restriction；When implementing, those skilled in the art can comprehensively consider actual conditions and above-mentioned various influence factors Deng, selection setting 1 output power of air supply part and travel speed between accurate corresponding relationship.

Generally speaking, the travel speed of automobile is faster, encircles interior flow-disturbing X and gets over disorder, the impact force of wheel hub flow-disturbing Y is also got over By force, correspondingly, air curtain A also just needs higher intensity, i.e. air supply part 1 also just needs higher output power, can specifically join Examine Fig. 6.

The air supply part 1 is specifically as follows air pump, or centrifugal fan, regardless of using the gas supply of which kind of form Component 1, as long as being capable of forming the above-mentioned air curtain A with proper strength；Above controller is specifically as follows PWM (Pulse Width Modulation, i.e. pulse width modulation) controller or other forms controller.

As shown in figure 3, above-mentioned outlet 21 can be set to the outer end of the wheel cover 4 of wheel 3 in the first specific embodiment Portion, and it is located at the front of wheel 3.It is appreciated that the outer end of above-mentioned wheel cover 4 refers to wheel cover 4 far from the part in the middle part of car body.

Specifically, can refer to Fig. 4, which can export for slit-shaped, can cover wheel 3 preferably to be formed The air curtain A in outside.

The slit-shaped is exported, the installation parameters such as length, width and specific setting position can be to the formation of air curtain A It impacts, when implementing, according to the difference of the practical situations such as automotive type, those skilled in the art can be by optimizing mould It is quasi- to calculate to be adjusted to above-mentioned each installation parameter, here, the embodiment of the present invention and not doing specific restriction to it.

But overall, the setting of the outlet 21 should to be formed by air curtain A covers wheel 3 as much as possible Arch area and corresponding wheel hub between wheel cover 4, so that more effectively interior flow-disturbing X, wheel hub flow-disturbing Y are encircleed in isolation, That is the length of above-mentioned slit-shaped outlet is unsuitable too short.

Meanwhile the width of slit-shaped outlet is also unsuitable narrow, to avoid causing 21 resistances of the outlet of runner 2 excessive, generates The excessive situation of 1 power of air supply part needed for identical air curtain A；And the width of slit-shaped outlet also should not be too large, to avoid going out Air-flow caused by mouth 21 directly impacts the tire tread of wheel 3, the situation for causing automobile windage to increase instead.Based on this, and tie Unify fixed Optimum Experiment, the width of the preferred slit-shaped outlet of the embodiment of the present invention can be 5-10mm.

As shown in figure 5, drainage can be equipped on the shell 7 of the automobile of wheel 3 in second of specific embodiment Plate 8, the drainage plate 8 can be enclosed drainage lumens B with shell 7, and the outlet 21 of runner 2 can be connected to drainage lumens B；From outlet 21 The gas of discharge can enter in drainage lumens B, and be discharged by drainage lumens B, to form above-mentioned air curtain A.

So set, the outlet of drainage lumens B is actually equivalent to the outlet of runner 2 in the first specific embodiment 21, and can also easily change the width that drainage lumens B is exported by adjusting the setting angle of drainage plate 8 and shell 7；Equally The width on ground, the above-mentioned outlet drainage lumens B can also be preferably 5-10mm.

Comparatively, above-mentioned second of specific embodiment is lower to the shape need of the outlet of runner 2 21, that is to say, that The structure of runner 2 can be relatively simple, and processing cost is lower, and still, since drainage plate 8 is set to shell 7, needs are made with vehicle Type carries out co-development, to avoid the streamline performance for influencing vehicle；And the first specific embodiment then may be directly applied to now In some vehicle moulding, it is more convenient for promoting the use of.

For the respective embodiments described above, can also further Optimal improvements be carried out to the structure of runner 2.

In detail, the inner wall of the runner 2 can seamlessly transit, to reduce resistance of the gas in 2 internal flow of runner；Stream Several flow distribution plates along 2 extending direction of runner are also provided in road 2, each flow distribution plate can divide the cross section of runner 2 It cuts, when largely avoiding 2 cross sectional dimensions of runner larger, because of gas on 2 section of runner caused by gas wall attachment effect The situation that body is unevenly distributed.

With continued reference to FIG. 2, above-mentioned air supply part 1 can also include air inlet 11, switch can be equipped at air inlet 11 Valve block 5, to adjust the aperture of air inlet 11, and then the intake of changeable air supply part 1.Specifically, the switch valve block 5 can Think venetian blind type structure, or other structures.

It further, can also include driving part, driving part can be electrically connected with above-mentioned switch valve block 5, and can Switch valve block 5 is driven to move, easily to adjust the aperture of air inlet 11.

Above-mentioned driving part can also be connect with controller above-mentioned (or other control units) signal, in use, by Controller sends driving signal to driving part, and driving part can receive and respond the driving signal, to drive switch valve block 5 Movement and then the aperture for adjusting air inlet 11, in this way, being more advantageous to being precisely controlled for switch valve block 5.

Further, it is also provided with filter element 6 at air inlet 11, the gas for entering air supply part 1 can be carried out Filtering influences the performance of air supply part 1 to prevent automobile dust, winged insect etc. in high-speed cruising from entering air supply part 1；Meanwhile Enter runner 2 prevented also from above-mentioned dust, winged insect etc., the situation for causing runner 2 to block.

After tested, after drop windage device is provided using the embodiment of the present invention, air resistance coefficient (Cd, i.e. Drag of automobile Coefficient it) can be greatly reduced, the power energy consumption in vehicle traveling process can also be greatly decreased.Specifically refer to Fig. 7, Fig. 7 Implement the air resistance coefficient variation of front and back vehicle for drop windage device provided by the present invention and power saves situation schematic diagram.

As shown in fig. 7, the embodiment of the present invention is provided after drop windage device implemented, no matter running car is in low-speed stage, Or high speed stage, the air resistance coefficient of vehicle can reduce by 4.2% or so, and then save the power of automobile in the process of moving The saving effect of consumption, and being continuously increased with automobile driving speed, power of vehicle consumption is further obvious.

The present invention also provides a kind of automobiles, including the drop windage device in the respective embodiments described above.

Since above-mentioned drop windage device has had technical effect as above, then, the automobile with the drop windage device Also when having similar technical effect, therefore this will not be repeated here.

The above is only the preferred embodiment of the present invention, it is noted that those skilled in the art are come It says, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as Protection scope of the present invention.

Claims (10)

1. a kind of drop windage device of automobile, which is characterized in that including air supply part (1) and runner (2), which enters Mouth is connected with the air outlet of the air supply part (1), and the gas of outlet (21) discharge of the runner (2) can be in the wheel (3) outside forms the compatible air curtain (A) of shell (7) with the automobile；

It further include controller, the controller is connect with the air supply part (1) signal, and can be according to the traveling of the automobile Speed changes the output power of the air supply part (1).

2. the drop windage device of automobile according to claim 1, which is characterized in that the outlet (21) is set to the wheel (3) Wheel cover (4) outer end, and be located at the wheel (3) front.

3. the drop windage device of automobile according to claim 2, which is characterized in that the outlet (21) is slit-shaped outlet, And the width of slit-shaped outlet is 5-10mm.

4. the drop windage device of automobile according to claim 1, which is characterized in that further include drainage plate (8), the drainage plate (8) it is provided close to the shell (7) of the automobile of the wheel (3), and is enclosed drainage lumens (B) with the shell (7)；

The outlet (21) is connected to the drainage lumens (B), enters the drainage lumens (B) from the gas of outlet (21) discharge, And be discharged by the drainage lumens (B), to form the air curtain (A).

5. the drop windage device of automobile described in any one of -4 according to claim 1, which is characterized in that the runner (2) it is interior Wall smooth transition.

6. the drop windage device of automobile according to claim 5, which is characterized in that be equipped in the runner (2) along the runner (2) several flow distribution plates of extending direction.

7. the drop windage device of automobile according to claim 5, which is characterized in that the air inlet of the air supply part (1) (11) switch valve block (5) is equipped at；

It further include driving part, the driving part is electrically connected with the switch valve block (5), and can drive the switch valve block (5) it moves, to adjust the aperture of the air inlet (11).

8. the drop windage device of automobile according to claim 7, which is characterized in that be additionally provided with filtering at the air inlet (11) Component (6), to filter the gas for entering the air supply part (1).

9. the drop windage device of automobile according to claim 5, which is characterized in that the air supply part (1) is centrifugal wind Machine.

10. a kind of automobile, which is characterized in that the drop windage device including automobile as claimed in any one of claims 1-9 wherein.