CN116395046A - Pneumatic automobile tire air guide device and control method thereof - Google Patents

Abstract

The invention relates to a pneumatic automobile tire air guide device and a control method thereof, belonging to the technical field of automobile aerodynamics.

Description

Pneumatic automobile tire air guide device and control method thereof

Technical Field

The invention relates to the technical field of automobile aerodynamics, in particular to a pneumatic automobile tire air guide device and a control method thereof.

Background

After the running speed of the automobile exceeds a certain value, the air resistance (wind resistance) becomes the running resistance with the largest proportion; the driving resistance directly affects the hundred kilometers of fuel consumption of the fuel vehicle, and affects the endurance mileage of the electric vehicle. It is calculated that the aerodynamic drag can be increased by about 1.5km duration per 1% decrease. Therefore, reducing the windage coefficient is an extremely important performance goal for vehicles.

The automobile running at high speed, the front incoming flow impacts on the tire and is rolled into the tire cavity, so that great tire resistance is formed. The tire resistance is a large part of the wind resistance of the whole vehicle, so that the wind resistance of the tire is reduced, the wind resistance of the whole vehicle can be effectively reduced, the oil consumption is reduced, and the energy consumption is saved.

The utility model discloses a collapsible car choke plate as publication No. CN107244357A, belongs to car choke plate technical field, fixed choke plate and move and be connected through flexible connecting band between the choke plate, fixed hole and the rotation axis of passive bevel gear lower extreme of fixed choke plate up end position cooperate, the connecting axle of initiative bevel gear is connected with the motor through the shaft coupling, is equipped with a connecting rod of horizontal direction between the lateral wall face of rotation axis and the fixed block, wherein the fixed block sets up in the slide at the choke plate up end middle part, fixed choke plate and the upper portion same position department of choke plate lee face be equipped with electro-magnet two and electro-magnet one. The choke plate is of a sheet structure, is vertically arranged in a telescopic mode, is complex in mechanism, is multiple in moving parts, is extremely easy to be blocked by dust, sludge and the like to cause failure, is very complex in maintenance and replacement, is high in cost, and cannot be applied on a large scale.

Disclosure of Invention

In order to solve the technical problems, the invention provides the pneumatic automobile tire air guide device which is simple in structure, low in manufacturing cost and convenient to maintain and replace, and the air guide plate is rotated, stretched and returned in an air charging and air extracting mode, so that the purposes of reducing the wind resistance of the tire and reducing the oil consumption are achieved.

In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the pneumatic automobile tire air guide device comprises an air guide plate rotatably arranged in front of and/or behind a tire, and a pneumatic component for driving the air guide plate to extend out in a rotating manner is connected between the air guide plate and an automobile body.

The air deflectors at the front and the rear of the tire are symmetrically arranged, and one end of each air deflector is connected with the vehicle body through a hinged frame.

The air guide device further comprises a fixed base fixed on the vehicle body, wherein the fixed base is located above the air guide plate, and the fixed base is connected with the air guide plate through the pneumatic component.

The fixed base and the air deflector are both arranged at the end part of the wheel cover.

The pneumatic component comprises an air bag connected between the fixed base and the air deflector and an air supply component arranged on the fixed base, and the air bag is connected with the air supply component which can be pumped and inflated through an air pipe.

The upper end face of the air deflector is provided with a containing groove for containing the air bag.

The air supply part comprises an air pump and an air pump, a control valve I and a pressure sensor I are arranged in an air pipe connected with the air pump, and the pressure sensor I and a speed sensor for detecting the speed of the vehicle are connected with the air pump and the control valve I through a control module; the air pipe connected with the inflator pump is internally provided with a control valve II and a pressure sensor II, and the pressure sensor II and a speed sensor for detecting the speed of the vehicle are connected with the inflator pump and the control valve II through a control module.

The pressure sensor I and the pressure sensor II are connected with the alarm unit through the control module.

The control method of the pneumatic automobile tire air guide device comprises the following steps:

step 1: judging whether the vehicle speed exceeds a set high-speed value;

step 2: if the vehicle speed exceeds a set high-speed value, the pneumatic component is inflated to enable the air deflector to rotate and stretch out until reaching the set air pressure value, and then maintaining the pressure;

step 3: if the speed of the vehicle does not exceed the set high speed value, the pneumatic component pumps air to enable the air deflector to rotate and retract until the set air pressure value is reached, and then pressure is maintained.

And (2) when the air deflector rotates to extend out to form an included angle of 20-45 degrees with the horizontal plane, starting pressure maintaining.

The beneficial effects of the invention are as follows:

1. the pneumatic automobile tire air guide device is designed, the air guide plate is rotatably arranged in front of and/or behind an automobile tire, the pneumatic component is connected between the air guide plate and the automobile body, the air guide plate can be driven to rotate and extend according to the requirement, the purposes of reducing the tire wind resistance and increasing the operation stability of the automobile are achieved, and the air guide device is simple in structure, free of complex movement mechanisms, convenient to maintain and replace, low in manufacturing cost and suitable for large-scale use.

2. According to the invention, the fixed base is arranged in front of and/or behind the vehicle body tire, the air bag is connected between the fixed base and the air deflector, and the air bag is driven to expand or contract through the air supply part, so that the air deflector is driven to extend or return in a rotating manner, a pneumatic driving mode can be realized slowly, the energy consumption is low, the impact of a slight object can be borne, the impact is not easy to damage, the buffering effect is realized, and the air bag can be repaired simply by means of glue and the like even if the air bag is damaged, and the maintenance cost is low.

Drawings

The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:

FIG. 1 is a schematic view of a tire air guide apparatus of the present invention mounted on a vehicle body;

FIG. 2 is an isometric view of a tire air guide of the present invention;

FIG. 3 is a state diagram of the tire air guide of the present invention when the bladder is inflated;

FIG. 4 is a state diagram of the tire air guiding device of the present invention when the air bag is deflated;

FIG. 5 is a cross-sectional view of the tire air guide of the present invention as the bladder is inflated;

FIG. 6 is a schematic view of the structure of the air supply unit of the present invention;

FIG. 7 is a control schematic diagram of the tire air guide of the present invention;

the labels in the above figures are: 1. the air deflector, 11, the accommodation groove, 2, the articulated frame, 3, the unable adjustment base, 4, the gasbag, 5, the air feed part, 51, the aspiration pump, 52, the pump, 53, control valve I, 54, pressure sensor I, 55, control valve II, 56, pressure sensor II, 6.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The specific embodiments of the invention are as follows: as shown in fig. 1 to 7, the invention provides a pneumatic automobile tire air guiding device, which comprises air guiding plates 1 rotatably arranged in front of and behind a tire, wherein the air guiding plates 1 in front of and behind the tire are symmetrically arranged, so that the air in front of and behind the tire can be guided to the ground, the air quantity entering the tire is reduced, and the air guiding plates 1 can be independently arranged in front of or behind the tire. The tires are not limited to the front wheels or the rear wheels, and may be arranged in the vicinity of 4 tires of the vehicle body at the same time, or may be arranged in the vicinity of two front-wheel tires of the vehicle body. The pneumatic component for driving the air deflector 1 to extend in a rotating way is connected between the air deflector 1 and the vehicle body, and the air deflector 1 can be driven to extend in a rotating way according to the requirement, so that the purposes of reducing the wind resistance of tires and increasing the operation stability of the vehicle are achieved.

Specifically, one end of the air deflector 1 is connected with the vehicle body through the hinge frame 2, so that the air deflector 1 can rotate along the hinge point of the hinge frame 2 to realize the expansion and contraction return of the air deflector.

Specifically, the wind guiding device further comprises a fixed base 3 fixed on the vehicle body in a welding or bolt connection mode, wherein the fixed base 3 is positioned above the wind guiding plate 1, and the fixed base 3 is connected with the wind guiding plate 1 through a pneumatic component. The fixed base 3 and the air deflector 1 are arranged at the end part of the wheel cover, the inner side of the air deflector 1 exceeds the inner edge of the tire, and the outer side of the air deflector 1 exceeds 2/3 of the width of the tire, so that the wind resistance is effectively reduced.

Specifically, the pneumatic components include an air bag 4 connected between the fixed base 3 and the air deflector 1 and an air supply component 5 provided on the fixed base 3, and the air bag 4 is connected with the air supply component 5 which can be both pumped and inflated through an air pipe 6. The air supply part 5 drives the air bag 4 to expand or contract, so that the air deflector 1 is driven to extend or return in a rotating way, and the pneumatic driving mode can be realized slowly, so that the energy consumption is low.

The fixed base 3 is made of PP and other materials, is in a sheet shape, is harder in material but has certain toughness, and can be bent along with the shape of the wheel cover. And the fixed base 3 is coated with a strong adhesive coating, so that the fixed base can be directly adhered above the air bag 4 without additional mounting points.

The whole length of the air bag 4 is 200 mm-300 mm, the upper part is sealed and adhered with the fixed base 3, and the lower part is sealed and adhered with the air deflector 1. The air bag 4 is made of rubber and can be inflated and deformed under the inflation condition. The gasbag 4 can bear the striking of slight object and not fragile, has played the cushioning effect moreover, even after gasbag 4 damages, can repair through modes such as glue simply, the maintenance cost is lower.

The upper end face of the air deflector 1 is provided with a containing groove 11 for containing the air bag 4, so that the positioning stability of the air bag 4 is ensured. The bottom end molded surface of the air deflector 1 is an arc-shaped surface under natural conditions, and can be set to be an inclined surface, the air deflector 1 is made of PP, ABS and other materials, the materials are hard but have certain toughness, the inner side is coated with a strong adhesive coating, the air deflector can be directly adhered to the lower part of the air bag 4, and the air deflector is opened downwards along with the inflation of the air bag 4 without additional mounting points.

The air supply part 5 comprises an air pump 51 and an air pump 52, a control valve I53 and a pressure sensor I54 are arranged in an air pipe 6 connected with the air pump 51, and the pressure sensor I54 and a speed sensor for detecting the speed of the vehicle are connected with the air pump 51 and the control valve I53 through a control module (whole vehicle controller); a control valve II 55 and a pressure sensor II 56 are arranged in an air pipe 6 connected with the inflator 52, and the pressure sensor II 56 and a speed sensor for detecting the speed of the vehicle are connected with the inflator 52 and the control valve II 55 through a control module (whole vehicle controller).

The speed sensor is used for detecting whether the vehicle speed exceeds a high speed value, when the vehicle speed exceeds the set high speed value, the control module (whole vehicle controller) controls the control valve II 55 to be opened, controls the inflator pump 52 to perform inflation, and fills air into the air bag 4 through the air pipe 6 to expand the air bag 4, and when the pressure sensor II 56 detects that the pressure in the air pipe 6 reaches the set pressure, the control module (whole vehicle controller) controls the control valve II 55 and the inflator pump 52 to be closed and then to maintain the pressure; when the pressure in the air pipe 6 reaches the set pressure, the control module (vehicle controller) controls the control valve I53 and the air pump 51 to be closed and then maintains the pressure.

In addition, the pressure sensor I54 and the pressure sensor II 56 are connected with the alarm unit through the control module. Pressure sensor I54 and pressure sensor II 56 are continuously monitoring the pressure conditions within balloon 4 and trachea 6, whether balloon 4 is in an inflated or deflated state. If the pressure changes rapidly, the air bag 4 or the pipeline is indicated to have leakage, and an alarm or a prompt can be sent out at the moment, so that the maintenance of the vehicle owner is facilitated. After the air bag 4 is disassembled, a leakage source can be found out for repairing in a similar tire repairing mode. Since the air bag 4 is pressed very low, the maintenance requirement is not high, and the problem can be solved even by a mode of sticking a strong adhesive tape. If the air bags 4 are seriously damaged, the air bags 4 can be directly replaced, and only the air bags 4 with the same length are selected to be re-adhered in the original position.

When the air guide device is installed, firstly, selecting an air bag 4 model with a proper size according to the actual length below a wheel cover of a vehicle; then, the vehicle wheel housing is fixed below by the fixing base 3, and an opening through which the air tube 6 passes is provided in the fixing base 3.

Because the air guide device has smaller volume, the air supply part 5 and the control module can be arranged at any position in the engine compartment of the vehicle, and can also be arranged and fixed in the wheel cover area. Then, the air pipe 6 with proper length is cut, one end of the air pipe 6 is connected and positioned on the fixed base 3, the other end of the air pipe is connected with the two branch air pipes 6 through a tee joint, and the two branch air pipes 6 are respectively connected with the air pump 51 and the air pump 52 of the air supply part 5. When in connection, a small amount of sealing glue can be smeared on the inner wall of the end part of the air pipe 6 to ensure gas sealing.

When the wind guiding device is required to be installed at the front and rear sides of 4 wheels of the automobile, an air supply part 5 and a control module CAN be installed near each wheel cover, and then the CAN buses are respectively connected, namely, 4 sets of wind guiding devices are installed in a distributed mode. The air deflector 1, the fixed base 3 and the air bag 4 can be only installed near 4 wheel covers, and the air pipe 6 is connected with one air supply part 5 after being gathered together through a plurality of three-way joints and is connected with only one control module, namely, the integrated installation.

The control method of the pneumatic automobile tire air guide device comprises the following steps:

step 1: it is determined whether the vehicle speed exceeds a set high speed value. The set high-speed value is generally 80kph, when the vehicle speed is higher than 80kph, the vehicle is in a running state with better road conditions at present, and the wind resistance proportion in the running resistance composition is far higher than the mechanical resistance; when the speed of the vehicle is lower than 80kph, the road condition of the vehicle is relatively poor, and the influence of wind resistance is negligible.

Step 2: if the vehicle speed exceeds a set high-speed value, the pneumatic component is inflated to enable the air deflector 1 to extend in a rotating mode until the set air pressure value is reached, and then pressure is maintained.

If the speed exceeds 80kph, the vehicle is in a running state with good road conditions, and the wind resistance proportion in the running resistance composition is far higher than the mechanical resistance at the moment, so that the wind guide device is necessary to be started. At this time, the control module gives an inflation instruction, all the air pumps 52 start to inflate the air bags 4, the air deflector 1 rotates to extend, when the pressure sensor II 56 detects that the pressure in the air pipe 6 reaches the set pressure (generally 0.3 bar), the air deflector 1 rotates to extend to an included angle of 20-45 degrees with the horizontal plane, the effect of reducing the wind resistance of the tire is better in this state, and the control module controls the control valve II 55 and the air pumps 52 to be closed, so that the existing pressure of the air bags 4 is maintained.

After all the air deflectors 1 rotate and stretch out, when part of air flows under the wheel cover, the air flows can be prevented from impacting the tire under the influence of the air deflectors 1, and the effect of reducing wind resistance is achieved. And according to simulation and test results, the device can reduce high-speed wind resistance by about 3%.

Step 3: if the speed of the vehicle does not exceed the set high speed value, the pneumatic component pumps air to enable the air deflector 1 to rotate and retract until the set air pressure value is reached, and then the pressure is maintained.

When the speed of the vehicle is lower than 80kph, the road condition of the vehicle is relatively poor, and the influence of wind resistance is negligible. At this time, the control module gives an air extraction instruction, all air extraction pumps 51 start to extract air, the air bag 4 is contracted, the air deflector 1 reversely rotates and returns, when the pressure sensor I54 detects that the pressure in the air pipe 6 reaches the set pressure (generally-0.05 bar), the air bag 4 is in a flat air extraction state, the air deflector 1 returns, and the control module controls the control valve I53 and the air extraction pumps 51 to be closed, so that the existing pressure of the air bag 4 is maintained.

The inflation or deflation process takes about 20 seconds, depending on the size of the air bag 4, and the larger the air bag 4, the longer the time it takes.

The airbag 4 device of the present invention is not only applicable to the front and rear of the vehicle wheel, but also effective in expanding to other areas. The vehicle speed 80kph and the air pressure in the present invention are only representative, and the vehicle speed and the air pressure can be adjusted according to regulations, road conditions and the size of the air bag 4.

The invention designs a pneumatic automobile tire air guide device, and the air bag 4 is connected with an air guide plate 1, so that the whole air guide device forms a three-dimensional air guide structure, and a wind tunnel test of 120kph is carried out on the three-dimensional air guide structure and a flat air guide structure, and the wind resistance coefficient of the three-dimensional air guide structure is 0.003 lower than that of the flat air baffle. Therefore, the air guide device can achieve the purposes of reducing the wind resistance of the tire and increasing the operation stability of the vehicle, has simple structure, no complex movement mechanism, convenient maintenance and replacement and low manufacturing cost, and is suitable for large-scale use.

According to the invention, the fixed base 3 is arranged in front of and/or behind the vehicle body tire, the air bag 4 is connected between the fixed base 3 and the air deflector 1, and the air supply part 5 drives the air bag 4 to expand or contract, so that the air deflector 1 is driven to extend or return in a rotating manner, a pneumatic driving mode can be realized slowly, the energy consumption is low, the impact of a slight object can be borne, the impact is not easy to damage, the buffering effect is realized, and the maintenance cost is low even if the air bag 4 is damaged, the air bag can be repaired simply by means of glue and the like.

In summary, the wind guiding device designed by the invention has simple structure, low manufacturing cost and convenient maintenance and replacement, realizes the rotation extension and return of the wind guiding plate by means of inflation and air extraction, and achieves the aims of reducing the wind resistance of the tire and reducing the oil consumption.

The foregoing is provided by way of illustration of the principles of the present invention, and is not intended to be limited to the specific constructions and applications illustrated herein, but rather to all modifications and equivalents which may be utilized as fall within the scope of the invention as defined in the claims.

Claims (10)

1. The pneumatic automobile tire air guide device is characterized by comprising an air guide plate rotatably arranged in front of and/or behind a tire, and a pneumatic component for driving the air guide plate to rotate and extend out is connected between the air guide plate and an automobile body.

2. A pneumatic car tire air guide apparatus as in claim 1, wherein: the air deflectors at the front and the rear of the tire are symmetrically arranged, and one end of each air deflector is connected with the vehicle body through a hinged frame.

3. A pneumatic car tire air guide apparatus as in claim 1, wherein: the air guide device further comprises a fixed base fixed on the vehicle body, wherein the fixed base is located above the air guide plate, and the fixed base is connected with the air guide plate through the pneumatic component.

4. A pneumatic car tire air guide according to claim 3, wherein: the fixed base and the air deflector are both arranged at the end part of the wheel cover.

5. A pneumatic car tire air guide according to claim 3, wherein: the pneumatic component comprises an air bag connected between the fixed base and the air deflector and an air supply component arranged on the fixed base, and the air bag is connected with the air supply component which can be pumped and inflated through an air pipe.

6. A pneumatic car tire air guide as in claim 5 wherein: the upper end face of the air deflector is provided with a containing groove for containing the air bag.

7. A pneumatic car tire air guide as in claim 5 wherein: the air supply part comprises an air pump and an air pump, a control valve I and a pressure sensor I are arranged in an air pipe connected with the air pump, and the pressure sensor I and a speed sensor for detecting the speed of the vehicle are connected with the air pump and the control valve I through a control module; the air pipe connected with the inflator pump is internally provided with a control valve II and a pressure sensor II, and the pressure sensor II and a speed sensor for detecting the speed of the vehicle are connected with the inflator pump and the control valve II through a control module.

8. The pneumatic car tire air guide device of claim 7, wherein: the pressure sensor I and the pressure sensor II are connected with the alarm unit through the control module.

9. A control method of a pneumatic car tire air guide device according to any one of claims 1 to 8, characterized by: the method comprises the following steps:

step 1: judging whether the vehicle speed exceeds a set high-speed value;

step 2: if the vehicle speed exceeds a set high-speed value, the pneumatic component is inflated to enable the air deflector to rotate and stretch out until reaching the set air pressure value, and then maintaining the pressure;

step 3: if the speed of the vehicle does not exceed the set high speed value, the pneumatic component pumps air to enable the air deflector to rotate and retract until the set air pressure value is reached, and then pressure is maintained.

10. The pneumatic car tire air guide device of claim 9, wherein: and (2) when the air deflector rotates to extend out to form an included angle of 20-45 degrees with the horizontal plane, starting pressure maintaining.

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