A front wing air-blowing type active aerodynamic balance adjustment device

Abstract

The present invention discloses a front wing air-blowing type active aerodynamic balance adjustment device, which relates to the technical field of automobiles. The balance adjustment device includes a flow guiding device, a front wing, a vehicle body, an engine and an intake assembly. The front wing is arranged at the front end of the vehicle body, and a main wing, an inner flap and an outer flap are installed on the front wing. The engine and the intake assembly are arranged at the rear of the vehicle body and are used for discharging the gas generated when the racing car closes the throttle. The flow guiding device is arranged on the vehicle body and is connected to the engine and the intake assembly. The flow guiding device is used to direct a certain flow rate discharged by the engine and the intake assembly to the suction side of the inner flap of the front wing. The present invention utilizes the large-flow gas discharged by the engine supercharger, without adding an additional power source, has a simple structure and a low cost. The function exerted by the device is approximately positively correlated with the vehicle speed, and thus corresponds to the change of the negative lift of the front wing at each vehicle speed, realizing the sensitivity adjustment of the front wing at all vehicle speeds.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and specifically to a front wing air-blowing type active aerodynamic balance adjustment device. Background Art

[0002] Aerodynamics is one of the key technical issues in formula racing cars. The three most important indicators in aerodynamic research are the aerodynamic force level, the aerodynamic balance degree, and the aerodynamic sensitivity. Among them, aerodynamic sensitivity refers to the degree to which the aerodynamic force generation ability of aerodynamic components changes with the environment, which determines the stable performance of the dynamic performance of the racing car on the real track. Ensuring low aerodynamic sensitivity is very important for improving the high-speed stability of the racing car, especially for tracks with many curves.

[0003] When the racing car enters a curve at high speed, at this time the racing car will perform high-intensity braking, the body posture shows a forward tilt, the approach of the front wing to the ground and the increase of the angle of attack. Due to the ground effect, before the front wing stalls, the negative lift of the front wing will increase significantly.

[0004] That is, in the early stage of braking, it will be manifested as the center of wind pressure being too far forward;

[0005] In the late stage of braking, the front wing may stall, and the center of wind pressure will suddenly move backward.

[0006] The significant movement of the center of wind pressure position will trigger a change in the handling characteristics of the racing car, affect the handling stability of the racing car, and is not conducive to the driver's control of the racing car.

[0007] Currently, the difficulty in improving the aerodynamic stability of racing cars lies in that only by controlling the static parameters of the front wing, such as the distance between the main wing and the ground, the airfoil, the angle of attack, etc., the reduction of the front wing sensitivity is very limited. How to reasonably utilize the characteristics of the racing car to suppress the increase of the negative lift of the front wing caused by the ground effect in the early stage of high-speed braking to ensure a low aerodynamic sensitivity of the racing car is one of the key points in the aerodynamic design of racing cars. Summary of the Invention

[0008] The purpose of the present invention is to provide a front wing air-blowing type active aerodynamic balance adjustment device to solve the problems in the background art.

[0009] To achieve the above purpose, the present invention provides the following technical solutions:

[0010] A front wing air-blowing active aerodynamic balance adjustment device, comprising a flow guiding device, a front wing, a vehicle body, an engine and an air intake assembly. The front wing is arranged at the front end of the vehicle body. A main wing, an inner flap and an outer flap are installed on the front wing. The engine and the air intake assembly are arranged at the rear of the vehicle body and are used for discharging the gas generated when the racing car closes the throttle. The flow guiding device is arranged on the vehicle body and is connected to the engine and the air intake assembly. The flow guiding device is used to direct a certain flow rate discharged by the engine and the air intake assembly to the suction side of the inner flap of the front wing.

[0011] Based on the above technical solution, the present invention also provides the following optional technical solutions:

[0012] In an optional solution: A flow guiding strip, a fixing plate, inner end plates and outer end plates are also installed on the front wing. The fixing plate is connected to the inner flap and is used to fix the inner flap on the front wing. There are two inner end plates and two outer end plates, and both the inner end plates and the outer end plates are connected to the outer flap. The two inner end plates are symmetrically arranged, and the two outer end plates are symmetrically arranged. The flow guiding strip is arranged on the outer side wall of the outer end plate.

[0013] In an optional solution: The fixing plate is a carbon fiber-aluminum honeycomb composite plate; The main wing has a variable cross-section. The chord length of the main wing corresponding to the inner flap is 345 mm, and the angle of attack is 4°.

[0014] In an optional solution: The engine and the air intake assembly include an air filter, a restrictor, an engine supercharger, an intake pipeline, a pressure relief valve, an electronic throttle valve, and an engine. The engine is arranged on the vehicle body and its rotational speed matches the vehicle speed. The engine is connected to the flow guiding device. The intake pipeline is connected to the intake end of the electronic throttle valve. The electronic throttle valve is connected to the engine. The pressure relief valve is arranged on the intake pipeline and the pressure relief valve is connected to the flow guiding device. The air filter, the restrictor and the engine supercharger are arranged at the port of the intake pipeline. The engine supercharger is used to supply gas to the engine.

[0015] In an optional solution: The pressure relief valve includes a pressure relief valve base, a lower air chamber, an upper air chamber, a spring support, a spring and a piston. The pressure relief valve base is installed on the intake pipeline after the engine supercharger. One end of the spring is connected to the spring support, and the other end is connected to the piston. The piston is driven by the pressure difference between the upper air chamber and the lower air chamber to control the opening and closing of the pressure relief valve. The lower air chamber is connected to the pipeline after the engine supercharger, and the upper air chamber is connected to the rear side of the electronic throttle valve.

[0016] In an optional solution: The vehicle body includes a monocoque and a nose cone. The nose cone is arranged at the front end of the monocoque and is a conical structure. Among them, the front wing is arranged on the front compartment of the monocoque, and the engine and the air intake assembly are arranged on the monocoque.

[0017] In an alternative solution: The flow guiding device includes a pagoda head, a flow guiding hose, a hose clamp, a flow guiding rigid pipe, and a fixing ear piece; the two pagoda heads are connected to the air release holes on both sides of the pressure relief valve base; one side of the two flow guiding hoses is connected to the pagoda head, and the two are fastened with a pair of hose clamps and pass through the complex powertrain area, and the other side is connected to the flow guiding rigid pipe and fastened with a hose clamp; the air outlet end of the flow guiding rigid pipe extends to the inner flap.

[0018] In an alternative solution: The flow guiding rigid pipe fits the vehicle body side protection area, and the flow guiding rigid pipe is fixedly connected to the outer wall of the vehicle body by using the fixing ear piece, and the outlet end of the flow guiding rigid pipe is fixedly connected to the inner side of the fixing plate by using the fixing ear piece.

[0019] In an alternative solution: The connection between the pressure relief valve base and the pagoda head needs to be coated with sealant.

[0020] In an alternative solution: At the fixing point on the single shell corresponding to the fixing ear piece, an insert is buried in the carbon fiber sandwich.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The present invention utilizes the large-flow gas discharged from the engine supercharger, without the need to additionally add a power source, has a simple structure and low cost. The function exerted by the device is approximately positively correlated with the vehicle speed, and thus corresponds to the change in negative lift of the front wing at each vehicle speed, realizing the sensitivity adjustment of the front wing at all vehicle speeds.

[0023] Through the CFD analysis of the whole vehicle, it is proved that after installing the "air blowing device", the aerodynamic sensitivity of the whole vehicle is improved, and the change amount of negative lift during the braking process is reduced by 33%;

[0024] The parametric simulation results of the whole vehicle of the present invention show that the installation of the "air blowing device" improves the lap time by 1.63 s, proving that the installation of the "air blowing device", that is, good aerodynamic sensitivity helps to improve the lap time;

[0025] The present invention is installed on a real vehicle, and after the real vehicle runs, by comparing the pitch angle - longitudinal acceleration diagram of the real vehicle running, it is proved that the "air blowing device" helps to maintain the stability of the racing car posture. Description of the Drawings

[0026] Figure 1 It is the rear axonometric view of the front wing air blowing type active aerodynamic balance adjustment device described in the present invention;

[0027] Figure 2 It is the front wing - vehicle body front axonometric view of the front wing air blowing type active aerodynamic balance adjustment device described in the present invention

[0028] Figure 3A rear axonometric view of an engine and a power assembly of the front wing air-blowing active aerodynamic balance adjustment device according to the present invention;

[0029] Figure 4 A side view of the front wing air-blowing active pneumatic balance adjustment device of the present invention;

[0030] Figure 5 This is a cross-sectional view of the pressure relief valve of the front wing air-blowing active pneumatic balancing adjustment device described in the present invention.

[0031] Reference numerals: 100-flow guide device, 110-pagoda head, 120-flow guide hose, 130-throat clamp, 140-flow guide hard pipe, 150-fixing ear piece, 200-front wing, 210-flow guide strip, 220-inner flap, 230-fixing plate, 240-main wing, 250-inner end plate, 260-outer end plate, 270-outer flap, 300-car body, 310- Nose cone, 320-monocoque, 400-engine and its intake assembly, 410-air filter, 420-restrictor, 430-engine supercharger, 440-intake pipe, 450-pressure relief valve, 451-pressure relief valve base, 452-lower air chamber, 453-upper air chamber, 454-spring base, 455-spring, 456-piston, 460-electronic throttle, 470-engine. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; in the drawings or descriptions, similar or identical parts use the same reference numerals, and in practical applications, the shape, thickness or height of each component can be enlarged or reduced. The various embodiments listed in the present invention are only used to illustrate the present invention and are not used to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.

[0033] In one embodiment, Figures 1 - 5 As shown, a front wing air-blowing active aerodynamic balance adjustment device comprises a guide device 100, a front wing 200, a vehicle body 300 and an engine and air intake assembly 400, wherein the front wing 200 is arranged at the front end of the vehicle body 300, and the front wing 200 is equipped with a main wing 240, an inner flap 220 and an outer flap 270, and the engine and air intake assembly 400 is arranged at the rear of the vehicle body 300 and is used to discharge the gas generated when the racing car closes the throttle; the guide device 100 is arranged on the vehicle body 300 and connected to the engine and air intake assembly 400, and the guide device is used to guide a certain flow discharged by the engine and the air intake assembly 400 to the suction side of the inner flap 220 of the front wing 100;

[0034] In this embodiment, the low-pressure area on the suction side of the inner flap 220 is affected by the gas discharged from the flow guiding device 100, the pressure difference between the upper and lower surfaces of the wing surface decreases, and the negative lift of the front wing 200 during cornering braking decreases, suppressing the increase in negative lift caused by the reduction of the ground clearance of the main wing 240 of the front wing 200, thereby suppressing the excessive movement of the center of wind pressure and improving the handling stability of the racing car; at the same time, since the generation of the front wheel jet is largely due to the pressure on the suction side corresponding to the inner flap 220 being less than the pressure of the outer flap 270, there is an inward induction for the air flow, and the gas blown out by the flow guiding device increases the pressure on the suction side corresponding to the inner flap 220;

[0035] In one embodiment, as Figures 1 - 4 shown, the front wing 200 is further provided with a flow guiding strip 210, a fixing plate 230, an inner end plate 250 and an outer end plate 260. The fixing plate 230 is connected to the inner flap 220 and is used to fix the inner flap 220 on the front wing 200. Both the inner end plate 250 and the outer end plate 260 are two and are both connected to the outer flap 270. The two inner end plates 25 are symmetrically arranged, and the two outer end plates 260 are symmetrically arranged. The flow guiding strip 210 is arranged on the outer side wall of the outer end plate 260; in this embodiment, when the gas blown out by the flow guiding device 100 increases the pressure on the suction side corresponding to the inner flap 220, due to the presence of the inner end plate 250 and the outer end plate 260, the outer flap 270 is hardly affected, reducing the generation of jet, and the negative lift of the underbody and side kits is increased;

[0036] In one embodiment, as Figure 2 shown, the fixing plate 230 is a carbon fiber-aluminum honeycomb composite plate; the main wing 240 has a variable cross-section. The chord length of the cross-section of the main wing 240 corresponding to the inner flap 220 is 345 mm, the angle of attack is 4°, and the lowest point is 65 mm from the ground; the lowest point of the outer end plate 260 is 55 mm from the ground.

[0037] In one embodiment, as Figure 1 shown, the vehicle body 300 includes a monocoque 320 and a nose cone 310. The nose cone 310 is arranged at the front end of the monocoque 320 and is a conical structure. Among them, the front wing 200 is arranged on the front compartment of the monocoque 320, and the engine and intake assembly 400 are arranged on the monocoque 320; in one embodiment, as Figures 2 - 5As shown, the engine and intake assembly 400 includes an air filter 410, a restrictor 420, an engine supercharger 430, an intake pipe 440, a pressure relief valve 450, an electronic throttle valve 460, and an engine 470; the engine 470 is provided on the vehicle body 300 and its rotational speed matches the vehicle speed, and the engine 470 is connected to the flow guiding device 100; the intake pipe 440 is connected to the intake end of the electronic throttle valve 460, the electronic throttle valve 460 is connected to the engine 470, the pressure relief valve 450 is provided on the intake pipe 440 and the pressure relief valve 450 is connected to the flow guiding device 100, and the air filter 410, the restrictor 420, and the engine supercharger 430 are provided at the port of the intake pipe 440; the engine supercharger 430 is used to supply gas to the engine 470;

[0038] The pressure relief valve 450 includes a pressure relief valve base 451, a lower air chamber 452, an upper air chamber 453, a spring support 454, a spring 455, and a piston 456; the pressure relief valve base 451 is installed on the intake pipe 440 behind the engine supercharger 430; one end of the spring 455 is connected to the spring support 454, and the other end is connected to the piston 456. The piston 456 is driven by the pressure difference between the upper air chamber 453 and the lower air chamber 452, thereby controlling the opening and closing of the pressure relief valve 450; the lower air chamber 452 is connected to the pipeline behind the engine supercharger 430, and the upper air chamber 453 is connected to the rear side of the electronic throttle valve 460; when the target load is lower than 25%, both the positive and negative pipes are connected, a negative pressure is generated behind the throttle valve, sucking up the piston, reducing the wear of the engine supercharger 430, and the flow guiding device obtains the maximum gas supply; when the target load is greater than 25%, the positive pressure joint pain, the negative pressure pipe is closed, and as the target load increases, the opening degree of the positive pressure pipe gradually decreases, preventing sudden torque changes of the engine, and at the same time reducing the gas supply of the flow guiding device 100; when the target load reaches 100%, both the positive and negative pressure pipes are closed, the pressure relief valve 450 is completely closed, and the flow guiding device 100 has no gas supply;

[0039] When in a partial load condition, that is, when the throttle is closed to a certain extent, the engine 470 does not require all the gas provided by the engine supercharger 430. To prevent excessive pressure in the post-supercharger intake pipe 440 and damage to the pipe and the engine supercharger 430, the lower air chamber 452 is connected to the pipe after the engine supercharger 430. The high-pressure driving piston 456 moves upward, and the pressure relief valve 450 is partially opened, and the flow guiding device 100 receives gas supply; finally, when the throttle is nearly or fully closed, to reduce the power consumption of the engine supercharger 430, its boost ratio should be reduced. After connecting the upper air chamber 453 to the electronic throttle 460, negative pressure will suck up the piston. At this time, the boost ratio is very small, which is beneficial to improving the fuel economy of the engine 470; and the pulley of the engine supercharger 430 is connected to the engine. The higher the engine speed, the greater the amount of gas that the engine supercharger 430 can provide. When the gear is fixed, the engine speed corresponds to the vehicle speed. The higher the vehicle speed, the greater the forward tilt amplitude of the vehicle body during braking, and the greater the influence of the negative lift of the front wing 200 due to the ground effect. At this time, the greater the gas flow discharged by the flow guiding device 100, the more obvious the inhibitory effect on this influence

[0040] In one embodiment, as Figure 2 shown, the monocoque 310 is the main structure of the racing car. The racing car adopts a three-quarter monocoque 310 structure, that is, a subframe is connected to the rear of the monocoque 310, and some fixing points of the rear suspension and the engine are installed on the subframe;

[0041] In one embodiment, as Figure 3 and Figure 4 shown, the flow guiding device 100 includes a pagoda head 110, a flow guiding hose 120, a hose clamp 130, a flow guiding hard pipe 140, and a fixing ear 150; the two pagoda heads 110 are connected to the air release holes on both sides of the pressure relief valve base 451; one side of the two flow guiding hoses 120 is connected to the pagoda head 110, and the two are fastened by a pair of hose clamps 130 and pass through the complex powertrain area. The other side is connected to the flow guiding hard pipe 140 and fastened with a hose clamp 130; the outlet end of the flow guiding hard pipe 140 extends to the inner flap 220; among them, the connection between the pressure relief valve base 451 and the pagoda head 110 needs to be coated with sealant;

[0042] The flow guiding hard pipe 140 fits the side protection area of the vehicle body 300. The flow guiding hard pipe 140 is fixed to the outer wall of the vehicle body 300 by using the fixing ear 150, and the outlet end of the flow guiding hard pipe 140 is fixedly connected to the inner side of the fixing plate 230 by using the fixing ear 150; the flow guiding hose 120 can be made of silicone tube, pass through the complex powertrain area, and can withstand high temperature;

[0043] The inner diameter of the diversion hose 120 is 26 mm. The tower head 110 is inserted into the diversion hose 120. The size difference between the two and the fastening of the hose clamp 130 ensure the airtightness at this interface. The diversion hose 120 passes through the complex powertrain area and is connected to the diversion rigid pipe 140 on the other side. The insertion depth should not be less than 10 mm and is fastened with the hose clamp 130. The inner diameter of the diversion rigid pipe 140 is 25 mm and the outer diameter is 27 mm.

[0044] The inner diameter of the diversion rigid pipe 140 can be set to 25 mm, the blowing angle can be set to horizontal, and the height from the ground at the outlet can be set to 200 mm. The above data are for a specific front wing 200, and adjustments need to be made to the above data for different front wing settings.

[0045] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An active pneumatic balance adjustment device for a front wing with air blowing, characterized in that, It includes a flow guiding device, a front wing, a car body, an engine and an air intake assembly. The front wing is arranged at the front end of the car body. The main wing, the inner flap and the outer flap are installed on the front wing. The engine and the air intake assembly are arranged at the rear of the car body and are used for discharging the gas generated when the racing car closes the throttle. The flow guiding device is arranged on the car body and is connected to the engine and the air intake assembly. The flow guiding device is used to guide a certain flow of gas discharged by the engine and the air intake assembly to the suction side of the inner flap of the front wing.

2. The front wing air-blowing type active pneumatic balance adjustment device according to claim 1, characterized in that, The front wing is also equipped with a flow guiding strip, a fixing plate, inner end plates and outer end plates. The fixing plate is connected to the inner flap and is used to fix the inner flap on the front wing. There are two inner end plates and two outer end plates, and both are connected to the outer flap. The two inner end plates are symmetrically arranged, and the two outer end plates are symmetrically arranged. The flow guiding strip is arranged on the outer side wall of the outer end plate.

3. The front wing air-blowing type active aerodynamic balance adjustment device according to claim 2, characterized in that, The fixing plate is a carbon fiber-aluminum honeycomb composite plate. The main wing has a variable cross-section. The chord length of the main wing section corresponding to the inner flap is 345 mm, and the angle of attack is 4°.

4. The front wing air-blowing active aerodynamic balance adjustment device according to claim 1, characterized in that, The engine and the air intake assembly include an air filter, a restrictor, an engine supercharger, an intake pipeline, a pressure relief valve, an electronic throttle valve, and an engine. The engine is arranged on the car body and its rotation speed matches the vehicle speed. The engine is connected to the flow guiding device. The intake pipeline is connected to the intake end of the electronic throttle valve. The electronic throttle valve is connected to the engine. The pressure relief valve is arranged on the intake pipeline and is connected to the flow guiding device. The air filter, the restrictor and the engine supercharger are arranged at the port of the intake pipeline. The engine supercharger is used to supply gas to the engine.

5. The front wing air-blowing type active aerodynamic balance adjustment device according to claim 4, characterized in that The pressure relief valve includes a pressure relief valve base, a lower air chamber, an upper air chamber, a spring support, a spring and a piston. The pressure relief valve base is installed on the intake pipeline behind the engine supercharger. One end of the spring is connected to the spring support, and the other end is connected to the piston. The piston is driven by the pressure difference between the upper air chamber and the lower air chamber to control the opening and closing of the pressure relief valve. The lower air chamber is connected to the pipeline behind the engine supercharger, and the upper air chamber is connected to the rear side of the electronic throttle valve.

6. The front wing air-blowing type active pneumatic balance adjustment device according to claim 5, characterized in that, The car body includes a monocoque and a nose cone. The nose cone is arranged at the front end of the monocoque and is a conical structure. Among them, the front wing is arranged on the front cabin of the monocoque, and the engine and the air intake assembly are arranged on the monocoque.

7. The front wing air-blowing active aerodynamic balance adjustment device according to claim 6, characterized in that, The flow guiding device includes a pagoda head, a flow guiding hose, a hose clamp, a flow guiding hard pipe, and a fixing ear piece. The two pagoda heads are connected to the air holes on both sides of the pressure relief valve base. One side of the two flow guiding hoses is connected to the pagoda head, and the two are fastened with a pair of hose clamps and pass through the complex powertrain area. The other side is connected to the flow guiding hard pipe and fastened with a hose clamp. The outlet end of the flow guiding hard pipe extends to the inner flap.

8. The front wing air-blowing type active pneumatic balance adjustment device according to claim 7, characterized in that The flow guiding hard pipe fits the side protection area of the car body. The flow guiding hard pipe is fixed to the outer wall of the car body by using the fixing ear piece. The outlet end of the flow guiding hard pipe is fixedly connected to the inner side of the fixing plate by using the fixing ear piece.

9. The front wing air-blowing type active pneumatic balance adjustment device according to claim 7, wherein Sealant needs to be applied to the connection between the pressure relief valve base and the pagoda head.

10. The front wing air-blowing active aerodynamic balance adjustment device according to claim 7, characterized in that, Embedded parts are buried in the carbon fiber sandwich layer at the fixing points on the monocoque corresponding to the fixing ear pieces.

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