WO2024199191A1 - Vehicle rear spoiler and vehicle - Google Patents

Abstract

A vehicle rear spoiler and a vehicle. The vehicle rear spoiler comprises side supports (1) and a spoiler plate (2), wherein an upper surface (21) and a lower surface (22) of the spoiler plate (2) are both streamlined, and the thickness of the spoiler plate (2) is gradually increased and then gradually reduced; the upper surface (21) and the lower surface (22) intersect each other at a front end of the spoiler plate (2) and form an arc-shaped end face (23); the upper surface (21) and the lower surface (22) intersect each other at a rear end of the spoiler plate (2) and form an acute included angle (α); and the radius of the arc-shaped end face (23) is R, the maximum thickness of the spoiler plate (2) is D, and the central angle of the arc-shaped end face (23) ranges from 60° to 180°, where 1/6 ≤ R/D ≤ 1/4.

Description

Vehicle tail wing and vehicle

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application No. 202320647320.0 filed in China on March 28, 2023, the entire contents of which are incorporated herein by reference.

Technical Field

The present invention relates to the technical field of automobile rear spoiler parts, and in particular to a vehicle rear wing and a vehicle.

Background Art

Aerodynamics plays an important role in vehicle design. The aerodynamic drag coefficient directly affects the power consumption of the vehicle. When a car is driving at high speed, air resistance accounts for more than 70% of the total resistance of the vehicle. Reducing air resistance is an important means to increase the driving range. The air resistance at the rear of the car accounts for more than 30% of the total air resistance. Reducing the air resistance at the rear of the car is particularly important.

Vehicle models in the related art usually add a hollow rear wing at the rear of the vehicle to achieve the trend of pressing down the rear of the vehicle, so as to reduce the wind resistance at the rear of the vehicle and improve driving stability. However, the existing hollow rear wings mostly use a spoiler with a rectangular cross-section, whose upper and lower surfaces are flat, and whose front and rear ends are thicker. After the airflow encounters the front end surface of the spoiler, the vertical and flat front end surface will generate resistance, and the blocked airflow will generate backflow, resulting in large wind resistance. The airflow after being guided by the upper and lower surfaces of the spoiler is separated too much at the rear end surface of the spoiler, and most of the airflow flowing through the upper surface leaves the rear of the vehicle. The downforce generated by the air resistance is weak, and there is still room for improvement in increasing vehicle adhesion and reducing wind resistance.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the related art and provide a new type of vehicle rear wing and vehicle, wherein the upper and lower surfaces of the spoiler are streamlined, the front end of the spoiler is arc-shaped, and the rear end is pointed. The airflow can be smoothly divided to the upper and lower surfaces through the arc-shaped end surface at the front end of the spoiler, and then guided to the rear end of the spoiler, and then gathered to press down the rear end of the vehicle, thereby reducing the vehicle's wind resistance and improving the vehicle's adhesion.

A first aspect of the present disclosure provides a vehicle rear wing, comprising two side brackets and a spoiler connected between the two side brackets;

In the direction from front to rear, the upper surface and the lower surface of the spoiler are both streamlined, and the thickness of the spoiler first gradually becomes thicker and then gradually becomes thinner;

The upper surface and the lower surface intersect at the front end of the spoiler and form an arc-shaped end surface;

The upper surface and the lower surface intersect at the rear end of the spoiler and form an acute angle;

The radius of the arc-shaped end surface is R, and the maximum thickness of the spoiler is D, wherein the central angle of the arc-shaped end surface is between 60° and 180°, and 1/6≤R/D≤1/4.

In some embodiments, the spoiler gradually tilts downward in a direction from front to rear, and an inclination angle of the spoiler to the horizontal plane in a counterclockwise direction is between 20° and 30°.

In some embodiments, an angle between the upper surface and the lower surface at the rear end of the spoiler is less than or equal to 30°.

In some embodiments, the length of the spoiler along the front-to-back direction is L;

The distance between the position of the maximum thickness of the spoiler and the front end of the spoiler is 1/3L.

In some embodiments, the central angle of the arc-shaped end surface is between 90° and 120°.

In some embodiments, connecting plates are connected to both ends of the spoiler, and the connecting plates are detachably connected to the side brackets.

In some embodiments, the thickness of the connecting plate gradually increases along a direction from the spoiler to the side bracket.

In some embodiments, an arc-shaped transition piece is connected between the front side of the connecting plate and the side bracket.

In some embodiments, the connecting plate and the spoiler are integrally injection molded.

A second aspect of the present disclosure provides a vehicle, comprising the vehicle rear wing described in any one of the embodiments of the first aspect.

The above technical solution has the following beneficial effects:

The vehicle tail wing and vehicle provided by the present disclosure have the upper and lower surfaces of the spoiler both streamlined, the front end of the spoiler has an arc-shaped end face, and the rear end of the spoiler is an acute-angle tip. When the vehicle is traveling at high speed, the airflow first meets the arc-shaped end face of the spoiler, and can be smoothly diverted to the upper and lower surfaces of the spoiler along the arc-shaped end face, and then guided to the rear end of the spoiler through the upper and lower surfaces of the spoiler. Since the upper and lower surfaces of the spoiler intersect at an acute angle at the rear end, it is beneficial for the airflow guided from the upper and lower surfaces to converge again, and the airflow gathered at the rear end of the spoiler jointly presses down the rear end of the vehicle, thereby reducing the wind resistance of the vehicle and improving the adhesion of the vehicle on the ground.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure of the present disclosure will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. In the drawings:

FIG1 is a perspective view of a vehicle rear wing provided by an embodiment of the present disclosure;

FIG2 is a rear view of the rear wing of the vehicle shown in FIG1 ;

FIG3 is a top view of the rear wing of the vehicle shown in FIG1 ;

FIG4 is a cross-sectional view of the spoiler in FIG3 along the AA direction;

FIG5 is a schematic diagram of airflow flowing along the guide plate;

FIG. 6 is a schematic diagram showing the rear wing of a vehicle being located above the rear windshield.

DETAILED DESCRIPTION

The specific embodiments of the present disclosure are further described below in conjunction with the accompanying drawings. The same parts are represented by the same figure numbers. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

As shown in FIGS. 1-6 , the vehicle rear wing provided by the embodiment of the first aspect of the present disclosure includes two side brackets 1 and a spoiler 2 connected between the two side brackets 1 .

In the direction from front to rear, the upper surface 21 and the lower surface 22 of the spoiler 2 are both streamlined, and the thickness of the spoiler 2 gradually increases first and then gradually decreases.

The upper surface 21 and the lower surface 22 intersect at the front end of the spoiler 2 to form an arc-shaped end surface 23 .

The upper surface 21 and the lower surface 22 intersect at the rear end of the spoiler 2 and form an acute angle α.

The radius of the arc-shaped end surface 23 is R, and the maximum thickness of the spoiler 2 is D, wherein the central angle of the arc-shaped end surface 23 is between 60° and 180°, and 1/6≤R/D≤1/4.

The vehicle rear wing provided in the embodiment of the present disclosure is a hollow rear wing, which is installed on the roof of the vehicle and is located above the rear windshield 5. An air flow channel is formed between the rear windshield 5 and the spoiler 2 of the vehicle rear wing. The spoiler 2 divides the airflow coming from the front into two streams, the lower stream of air is guided through the lower surface 22 of the spoiler 2 and passes through the air flow channel, and the upper stream of air is guided through the upper surface of the spoiler 2, and finally converges at the rear end or tail end of the spoiler 2 to press down the rear end of the vehicle or the rear windshield 5.

Specifically, the vehicle rear wing provided by the embodiment of the present disclosure includes two side brackets 1 and a spoiler 2. The side bracket 1 is used to connect with the side of the vehicle roof. The side bracket 1 can be a sheet metal part or a plastic part, and the spoiler 2 is a plastic plate, which is connected between the two side brackets 1. The end of the spoiler 2 can be connected to the side bracket 1 by a buckle, a pin, etc.

The cross section of the spoiler 2 is not rectangular or circular, but has a special-shaped structure. Specifically, the upper surface 21 and the lower surface 22 of the spoiler 2 are both streamlined, that is, the upper surface 21 and the lower surface 22 are both smoothly transitioned curved surfaces. In the direction from front to back, the upper surface 21 first bulges upward and then bends downward, and the lower surface 22 first bulges downward and then bends upward, so that the thickness of the spoiler 2 gradually increases from front to back and then gradually decreases.

The upper surface 21 and the lower surface 22 are bent and intersected at the front end of the spoiler 2, and an arc-shaped end surface 23 is formed at the front end of the spoiler 2. The radius of the arc-shaped end surface 23 is R, and the central angle of the arc-shaped end surface 23 is between 60° and 180°, which is convenient for smoothly guiding the meeting airflow to the upper surface 21 and the lower surface 22, and can also avoid blocking the backflow of airflow, which is conducive to reducing resistance.

The upper surface 21 and the lower surface 22 intersect in a straight line at the rear end of the spoiler 2, and an acute angle α is formed between the two, which is conducive to the airflow guided from the upper surface 21 and the lower surface 22 to converge at the rear end of the spoiler 2 and then jointly press down the rear of the vehicle.

The maximum thickness of the spoiler 2 is D, where 1/6≤R/D≤1/4. That is, the maximum thickness D of the spoiler 2 is 2-3 times the maximum thickness of the arc-shaped end surface 23, so that the transition from the arc-shaped end surface 23 to the maximum thickness of the spoiler 2 is relatively smooth, which is conducive to guiding the airflow to flow backward.

As shown in Fig. 4, the spoiler 2 is one of the NACA airfoils. The NACA airfoil has a lower drag coefficient, and the spoiler 2 can be selected to be one of the NACA airfoils, for example, NACA2412 or other airfoils.

In summary, in the vehicle rear wing provided by the embodiment of the present disclosure, the upper surface 21 and the lower surface 22 of the spoiler 2 are both streamlined, the front end of the spoiler 2 has an arc-shaped end surface 23, and the rear end of the spoiler 2 is an acute-angle tip. When the vehicle is traveling at high speed, the airflow first meets the arc-shaped end surface 23 of the spoiler 2, and can be smoothly diverted to the upper surface 21 and the lower surface 22 of the spoiler along the arc-shaped end surface 23, and then guided to the rear end of the spoiler 2 through the upper and lower surfaces of the spoiler 2. Since the upper surface 21 and the lower surface 22 of the spoiler 2 intersect at an acute angle at the rear end, it is beneficial for the airflow guided from the upper surface 21 and the lower surface 22 to be gathered again, and the airflow gathered at the rear end of the spoiler 2 jointly presses down the rear of the vehicle, reducing the wind resistance of the vehicle and improving the adhesion of the vehicle.

In one embodiment, as shown in Fig. 4-5, the spoiler 2 gradually tilts downward from the front to the rear, and the tilt angle between the spoiler and the horizontal plane in the counterclockwise direction is between 20° and 30°. That is, the spoiler 2 is higher in the front and lower in the back, and the angle between the spoiler and the horizontal plane is between 20° and 30°, which is conducive to guiding the airflow to press down the rear end of the vehicle at the rear end of the spoiler 2, thereby improving the adhesion of the vehicle.

In one of the embodiments, as shown in Figures 4-5, the angle between the upper surface 21 and the lower surface 22 at the rear end of the spoiler 2 is less than or equal to 30°, which is conducive to guiding the airflow from the upper surface 21 and the lower surface 22 to converge at the rear end of the spoiler 2, so as to reduce the separation amount of the airflow at the rear end of the spoiler 2.

In one embodiment, as shown in FIG4 , the length of the spoiler 2 along the front-to-back direction is L, the distance between the position of the maximum thickness of the spoiler 2 and the front end of the spoiler 2 is 1/3L, and the distance between the rear end of the spoiler 2 and the position of the maximum thickness is 2/3L. Such an arrangement makes the distance between the rear end of the spoiler 2 and the position of the maximum thickness longer, and the upper surface 21 and the lower surface 22 gradually and slowly transition from the position of the maximum thickness to the rear end of the spoiler 2, which is conducive to guiding the airflow along the upper surface 21 and the lower surface 22 to converge at the rear end of the spoiler 2.

In one embodiment, the center angle of the arc-shaped end surface 23 is between 90° and 120°, and the cross section of the arc-shaped end surface 23 is a major arc. Compared with the arc-shaped end surface 23 with a center angle less than 90°, the arc-shaped end surface 23 with a center angle between 90° and 120° increases the contact surface with the airflow, so as to guide more airflow along the arc-shaped end surface 23 to the upper surface 21 and the lower surface 22. Compared with the arc-shaped end surface 23 with a center angle greater than 120°, the thickness of the arc-shaped end surface 23 with a center angle between 90° and 120° is relatively small, so as not to make the maximum thickness of the spoiler 2 too thick, and also facilitate the smooth transition connection between the maximum thickness of the spoiler 2 and the arc-shaped end surface 23.

In one of the embodiments, as shown in FIGS. 1-3 , connecting plates 3 are connected to both ends of the spoiler 2 , and the connecting plates 3 are detachably connected to the side bracket 1 .

In this embodiment, a connecting plate 3 is respectively disposed at both ends of the spoiler 2 , and the connecting plate 3 is connected to the side bracket 1 . The connecting plate 3 may be made of a plastic plate, which mainly serves as a connection and a transition between the spoiler 2 and the side bracket 1 .

In one of the embodiments, the thickness of the connecting plate 3 gradually increases along the direction from the spoiler 2 to the side bracket 1 to improve the structural strength of the connection with the side bracket 1 .

In one of the embodiments, as shown in Figures 1 and 3, an arc-shaped transition piece 4 is connected between the front side of the connecting plate 3 and the side bracket 1 to play a wind shielding role, which can reduce or avoid the airflow from the front side entering the gap between the connecting plate 3 and the side bracket 1 to produce abnormal noise, and is also used to guide the airflow to the middle spoiler 2, and mainly organize the airflow through the spoiler 2.

In one embodiment, the connecting plate 3 and the spoiler plate 2 are integrally injection molded, which is convenient for processing and molding and has high structural strength.

The second aspect of the present disclosure provides a vehicle, comprising the vehicle rear wing described in any of the embodiments of the first aspect. The vehicle rear wing is installed at the rear of the vehicle roof, the side bracket 1 is connected to the side of the vehicle roof, and the vehicle rear wing is above the rear windshield 5. An airflow channel is formed between the rear windshield 5 and the spoiler 2 of the vehicle rear wing, and the spoiler 2 divides the airflow coming from the front into two streams, the lower stream of air is guided through the lower surface 22 of the spoiler 2 and passes through the airflow channel, and the upper stream of air is guided through the upper surface of the spoiler 2, and finally converges at the rear end or tail end of the spoiler 2 to press down the rear of the vehicle or the rear windshield 5.

As needed, the above technical solutions can be combined to achieve the best technical effect.

The above description is only the principle and preferred embodiment of the present disclosure. It should be pointed out that for ordinary technicians in this field, on the basis of the principle of the present disclosure, several other modifications can be made, which should also be regarded as the protection scope of the present disclosure.

Claims (10)

A vehicle rear wing comprises two side brackets and a spoiler connected between the two side brackets; In the direction from front to rear, the upper surface and the lower surface of the spoiler are both streamlined, and the thickness of the spoiler first gradually becomes thicker and then gradually becomes thinner; The upper surface and the lower surface intersect at the front end of the spoiler and form an arc-shaped end surface; The upper surface and the lower surface intersect at the rear end of the spoiler and form an acute angle; The radius of the arc-shaped end surface is R, and the maximum thickness of the spoiler is D, wherein the central angle of the arc-shaped end surface is between 60° and 180°, and 1/6≤R/D≤1/4. The vehicle rear wing according to claim 1, wherein in the direction from front to rear, the spoiler has an inclination angle with respect to the horizontal plane in the counterclockwise direction of 20°-30°. The vehicle rear wing according to claim 1 or 2, wherein the angle between the upper surface and the lower surface at the rear end of the spoiler is less than or equal to 30°. The vehicle rear wing according to any one of claims 1 to 3, wherein the length of the spoiler along the front-to-rear direction is L; The distance between the position of the maximum thickness of the spoiler and the front end of the spoiler is 1/3L. The vehicle rear wing according to any one of claims 1 to 4, wherein the central angle of the arc-shaped end surface is between 90° and 120°. The vehicle rear wing according to any one of claims 1 to 5, wherein both ends of the spoiler are connected with connecting plates, and the connecting plates are detachably connected to the side bracket. The vehicle rear wing according to claim 6, wherein the thickness of the connecting plate gradually increases in a direction from the spoiler to the side bracket. The vehicle rear wing according to claim 6 or 7, wherein an arc-shaped transition piece is connected between the front side of the connecting plate and the side bracket. The vehicle rear wing according to any one of claims 6 to 8, wherein the connecting plate and the spoiler are integrally injection molded. A vehicle comprising the vehicle rear wing according to any one of claims 1 to 9.