CN108528546B - Drag reduction and lift reduction two-compartment car spoiler and two-compartment car with same - Google Patents

Abstract

The invention discloses a drag-reducing and lift-reducing hatchback spoiler and a hatchback vehicle with the spoiler. The hatchback spoiler includes a spoiler body, the spoiler body is from the front edge to the rear The edge is divided into an attachment area, a delayed separation area, a separation area and a re-attachment area in turn; the hatchback includes a hatchback body, and the rear top of the hatchback body has an original attachment area and an original separation area. The attachment area of the spoiler body is connected with the top of the rear of the hatchback body, and the front edge of the upper surface of the spoiler body is located between the front edge of the original attachment area and the highest position of the hatchback body, and the upper surface of the delayed separation area is located between the front edge of the original attachment area and the highest position of the hatchback body. The trailing edge of the surface is located behind the original separation area; the leading edge of the upper surface of the reattachment area is located behind the rearmost position of the hatchback body. The invention can simultaneously reduce the resistance and the lift force during the running of the vehicle, thereby effectively reducing the energy consumption of the vehicle and improving the steering stability.

Description

A drag-reducing and lift-reducing hatchback spoiler and a hatchback with the spoiler

technical field

The invention relates to the field of auto parts, in particular to a drag-reducing and lift-reducing hatchback spoiler and a hatchback having the spoiler.

Background technique

At present, the air guide components installed at the rear of the car mainly include spoilers, tail wings, etc. Among them, the main function of the spoiler is to reduce the resistance of the body and improve the fuel economy during the driving process of the car; Downforce reduces the air lift experienced by the car and improves the handling stability of the car. However, when the spoiler reduces the drag, it will lead to an increase in lift, and when the rear wing reduces the lift, it will increase the drag of the whole vehicle; therefore, the traditional guide components cannot improve the fuel economy and the vehicle's fuel economy at the same time. Handling stability.

Therefore, how to provide a flow guide member capable of reducing drag and lift at the same time has become an urgent technical problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

In view of the above deficiencies in the prior art, the purpose of the present invention is to solve the problem of how to reduce air resistance and air lift at the same time, and to provide a drag-reducing and lift-reducing hatchback spoiler and a hatchback with the spoiler , which can reduce the resistance and lift force of the vehicle at the same time, thereby effectively reducing the energy consumption of the vehicle and improving the handling stability.

In order to solve the above technical problems, the technical solution adopted in the present invention is as follows: a drag-reducing and lift-reducing hatchback spoiler is characterized by comprising a spoiler body, and the spoiler body extends from the leading edge to the trailing edge It is divided into an attachment area, a delayed separation area, a separation area and a re-attachment area in turn; the upper surface of the attachment area is gradually inclined downward from the front edge of the spoiler body, and the upper surface of the delayed separation area is inclined downward from the upper surface of the attachment area. The trailing edge bends and extends downward, the upper surface of the separation zone extends downward from the trailing edge of the upper surface of the delay separation zone and then reversely bends, and the upper surface of the reattachment zone extends downward from the trailing edge of the upper surface of the separation zone until the spoiler The rear edge of the plate body; wherein, the upper edge of the longitudinal section of the spoiler body along the front-rear direction satisfies the B-spline curve:

In the formula, the B-spline basis function N _i,k (u) in i represents the serial number of the B-spline, k represents the power of the B-spline, and its value is the order of the basis function minus 1; u represents the B-spline nodes on a curve.

The above B-spline curve is determined by 12 control points A, B, C, D, E, F, G, H, I, J, K, L, the control points A-J along the spoiler body from the leading edge to the trailing edge distribution, where A-D is the attachment zone, D-F is the delayed separation zone, F-J is the separation zone, and J-L is the reattachment zone;

The X-Z rectangular coordinate system is established with the front and rear directions and height directions of the spoiler body. The value of A-L in the X direction gradually increases, and the difference between two adjacent control points is equal; the value of A-J in the Z direction gradually decreases. small, where the difference between two adjacent control points between A-D is equal, the difference between two adjacent control points between D-J is equal, and the difference between two adjacent control points between J-L is equal, and The difference between two adjacent control points between A-D is smaller than the difference between two adjacent control points between D-J, and the difference between two adjacent control points between J-L is smaller than the difference between two adjacent control points between A-D.

Further, the difference between the two adjacent control points of A-L in the X direction is 68mm to 98mm; the difference between the two adjacent control points of A-D in the Z direction is 6mm to 15mm, and the difference between D-J in the Z direction is 6mm to 15mm. The difference between two adjacent control points is 30mm to 48mm, and the difference between J-L in the Z direction between two adjacent control points is 0 to 10mm.

Further, the lower surface of the attachment zone is gradually inclined downward from the front edge of the spoiler body, the lower surface of the delayed separation zone is bent and extended downward from the rear edge of the lower surface of the attachment zone, and the lower surface of the delayed separation zone is The radius of curvature of the lower surface of the separation zone is smaller than that of its upper surface, the lower surface of the separation zone extends downward from the trailing edge of the lower surface of the retardation separation zone and then reversely bends, and the radius of curvature of the lower surface of the separation zone is also smaller than that of its upper surface, The lower surface of the reattachment zone extends downwardly from the trailing edge of the lower surface of the separation zone to the trailing edge of the spoiler body.

A hatchback vehicle having the above-mentioned drag-reducing and lift-reducing hatchback spoiler includes a hatchback vehicle body, and a rear top of the hatchback vehicle body has an original attachment area and an original separation area, characterized in that: the spoiler The attachment area of the fluid plate body is connected with the top of the rear of the hatchback body, and the rear end of the attachment area is located behind the original attachment area;

Taking the horizontal line where the highest position of the hatchback body is located as the X axis, and the vertical line where the rearmost position of the hatchback body is located as the Z axis, an X-Z Cartesian coordinate system is established; the front edge of the upper surface of the spoiler body is the control point A is located between the front edge of the original attachment area and the highest position of the hatchback body, the rear edge of the upper surface of the delayed separation area is located behind the original separation area; the front edge of the upper surface of the reattachment area is located at the rearmost position of the hatchback body the rear.

Further, the front edge of the upper surface of the spoiler body, that is, the control point A, is located in the middle of the front edge of the original attachment area and the highest position of the hatchback body.

Compared with the prior art, the present invention has the following advantages:

1. By improving the shape of the upper surface of the spoiler body, the resistance and lift force during the driving process of the vehicle can be reduced at the same time, thereby greatly reducing the energy consumption of the vehicle, improving the fuel economy of the vehicle, and improving the handling stability of the vehicle.

2. After the spoiler is installed on the hatchback, the resistance of the whole vehicle can be reduced by 4.8%, and the lift of the whole vehicle can be reduced by 9.3%.

Description of drawings

FIG. 1 is a cross-sectional view of the spoiler disclosed in the present invention.

FIG. 2 is a schematic diagram of the distribution of the upper control points.

FIG. 3 is a schematic structural diagram of a hatchback body after a spoiler is installed.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Example: Referring to Figures 1 and 2, a drag-reducing and lift-reducing hatchback spoiler includes a spoiler body, which is divided into an attachment area, a delay separation area, a Separation zone and re-attachment zone The upper surface of the attachment zone is gradually inclined downward from the front edge of the spoiler body, and the upper surface of the delayed separation zone is bent and extended downward from the rear edge of the upper surface of the attachment zone. The upper surface extends downwards from the rear edge of the upper surface of the delay separation zone and then reversely bends, and the upper surface of the reattachment zone extends downward from the rear edge of the upper surface of the separation zone to the rear edge of the spoiler body. The lower surface of the attachment zone is gradually inclined downward from the front edge of the spoiler body, the lower surface of the retardation separation zone is bent and extended downward from the rear edge of the lower surface of the attachment zone, and the radius of curvature of the lower surface of the retardation separation zone is It is smaller than the curvature radius of its upper surface, the lower surface of the separation zone extends downward from the trailing edge of the lower surface of the retardation separation zone and then reversely bends, and the curvature radius of the lower surface of the separation zone is also smaller than the curvature radius of its upper surface, and the reattachment zone The lower surface of the separator extends downwardly from the trailing edge of the lower surface of the separation zone to the trailing edge of the spoiler body. Among them, the upper edge of the longitudinal section of the spoiler body along the front-rear direction satisfies the B-spline curve:

In the formula, the B-spline basis function N _i,k (u) in i represents the serial number of the B-spline, k represents the power of the B-spline, and its value is the order of the basis function minus 1; u represents the B-spline nodes on a curve.

The above B-spline curve is determined by 12 control points A, B, C, D, E, F, G, H, I, J, K, L, the control points A-J along the spoiler body from the leading edge to the trailing edge distribution, where A-D is the attachment zone, D-F is the delayed separation zone, F-J is the separation zone, and J-L is the reattachment zone.

The X-Z rectangular coordinate system is established with the front and rear directions and height directions of the spoiler body. The value of A-L in the X direction gradually increases, and the difference between two adjacent control points is equal; the value of A-J in the Z direction gradually decreases. small, where the difference between two adjacent control points between A-D is equal, the difference between two adjacent control points between D-J is equal, and the difference between two adjacent control points between J-L is equal, and The difference between two adjacent control points between A-D is smaller than the difference between two adjacent control points between D-J, and the difference between two adjacent control points between J-L is smaller than the difference between two adjacent control points between A-D. In specific implementation, the difference between two adjacent control points of A-L in the X direction is 68mm~98mm; the difference between two adjacent control points of A-D in the Z direction is 6mm~15mm, and the difference between D-J in the Z direction is 6mm~15mm. The difference between the two adjacent control points above is 30mm to 48mm, and the difference between the two adjacent control points of J-L in the Z direction is 0 to 10mm.

As a specific implementation manner, the values of each upper control point are as follows:

Control point coordinates

Referring to FIG. 3 , a hatchback vehicle with the aforementioned drag-reducing and lift-reducing hatchback spoiler includes a hatchback body 2, and the top of the rear of the hatchback body 2 has an original attachment area and an original separation area, so The attachment area of the spoiler 1 is connected to the top of the rear of the hatchback body 2, and the rear end of the attachment area is located behind the original attachment area.

Taking the horizontal line where the highest position of the hatchback body 2 is located as the X axis, and the vertical line where the rearmost position of the hatchback body 2 is located is the Z axis to establish an X-Z Cartesian coordinate system; the front edge of the upper surface of the spoiler 1 body, That is to say, the control point A is located between the front edge of the original attachment area and the highest position of the hatchback body 2. In the specific implementation, the front edge of the upper surface of the spoiler 1 body, that is, the control point A is located between the front edge of the original attachment area and the uppermost position of the hatchback body 2. The middle of the highest position of the hatchback body 2. The trailing edge of the upper surface of the delayed separation area is located behind the original separation area; the leading edge of the upper surface of the reattachment area is located behind the rearmost position of the hatchback body 2 .

The incoming flow from the front flows along the upper surface of the spoiler, and a separation vortex is formed after the airflow separation occurs in the middle of the spoiler, and then the airflow is attached to the rear of the spoiler again. The flow mechanism of drag reduction and lift reduction of the spoiler is as follows: the attachment length of the airflow on the roof increases, and the separated airflow is reattached at the rear of the spoiler, and the reattachment of the airflow effectively improves the aerodynamic performance of the vehicle; the C of the vehicle The column vortex disappears, and new vortex pairs are generated on both sides of the spoiler (where the original C-pillar vortex is generated) with a lower intensity than the original C-pillar vortex; the trailing drag vortex is generated later and its intensity decreases. The reduction in vortex strength results in less energy being consumed by the engine. Therefore, after the spoiler is installed, the resistance and lift force during the running of the vehicle can be simultaneously reduced, thereby greatly reducing the energy consumption of the vehicle, improving the fuel economy of the vehicle, and improving the handling stability of the vehicle.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that those technical solutions of the present invention are modified or equivalently replaced without departing from the present technology. The purpose and scope of the solution should be included in the scope of the claims of the present invention.

Claims (5)

1. The utility model provides a two-compartment car spoiler that drag reduction rises which characterized in that: the device comprises a spoiler body, wherein the spoiler body is sequentially divided into an attachment area, a delay separation area, a separation area and a reattachment area from a front edge to a rear edge; the upper surface of the attachment area is gradually inclined downwards from the front edge of the spoiler body backwards, the upper surface of the delay separation area is bent downwards and extends from the rear edge of the upper surface of the attachment area, the upper surface of the separation area is bent backwards after being extended downwards from the rear edge of the upper surface of the delay separation area, and then the upper surface of the attachment area is extended downwards from the rear edge of the upper surface of the separation area to the rear edge of the spoiler body; wherein, spoiler body satisfies B spline curve along the upper edge of fore-and-aft direction's longitudinal profile:

in the formula, B spline basis function N_i,kIn (u), i represents the serial number of the B spline, k represents the power of the B spline, and the value is the subtraction of 1 from the order of the basis function; u is represented as a node on the B-spline curve;

the B spline curve is determined by 12 control points A, B, C, D, E, F, G, H, I, J, K, L, the control points A-J are distributed from the front edge to the rear edge of the spoiler body, wherein A-D is an attachment area, D-F is a delay separation area, F-J is a separation area, and J-L is a reattachment area;

establishing an X-Z rectangular coordinate system according to the front-back direction and the height direction of the spoiler body, wherein the values of A-L in the X direction are gradually increased, and the difference values between two adjacent control points are equal; and the values of A and J in the Z direction are gradually reduced, wherein the difference between two adjacent control points between A and D is equal, the difference between two adjacent control points between D and J is equal, the difference between two adjacent control points between J and L is equal, the difference between two adjacent control points between A and D is smaller than the difference between two adjacent control points between D and J, and the difference between two adjacent control points between J and L is smaller than the difference between two adjacent control points between A and D.

2. The drag reducing and lift reducing spoiler for two-compartment vehicles according to claim 1, wherein: the difference value between two adjacent control points of A-L in the X direction is 68-98 mm; the difference value between two adjacent control points of the A-D in the Z direction is 6-15 mm, the difference value between two adjacent control points of the D-J in the Z direction is 30-48 mm, and the difference value between two adjacent control points of the J-L in the Z direction is 0-10 mm.

3. The drag reducing and lift reducing spoiler for two-compartment vehicles according to claim 1, wherein: the lower surface of the attachment area is gradually inclined downwards from the front edge of the spoiler body backwards, the lower surface of the delay separation area is bent downwards and extends from the rear edge of the lower surface of the attachment area, the curvature radius of the lower surface of the delay separation area is smaller than that of the upper surface of the delay separation area, the lower surface of the separation area is bent backwards after extending downwards from the rear edge of the lower surface of the delay separation area, the curvature radius of the lower surface of the separation area is also smaller than that of the upper surface of the separation area, and the lower surface of the attachment area extends downwards from the rear edge of the lower surface.

4. A two-compartment vehicle with the drag-reducing and lift-reducing two-compartment vehicle spoiler of any one of the preceding claims, comprising a two-compartment vehicle body, wherein the top of the tail of the two-compartment vehicle body is provided with an original attachment area and an original separation area, and the two-compartment vehicle body is characterized in that: the attachment area of the spoiler body is connected with the top of the tail of the two-compartment car body, and the rear end of the attachment area is positioned behind the original attachment area;

establishing an X-Z rectangular coordinate system by taking a horizontal straight line where the highest position of the carriage body is located as an X axis and a vertical straight line where the rearmost position of the carriage body is located as a Z axis; the front edge of the upper surface of the spoiler plate, namely a control point A, is positioned between the front edge of the original attachment area and the highest position of the two-carriage vehicle body, and the rear edge of the upper surface of the delayed separation area is positioned behind the original separation area; the front edge of the upper surface of the reattachment area is positioned behind the rearmost position of the body of the two-compartment car.

5. The two-compartment vehicle according to claim 4, wherein: the front edge of the upper surface of the spoiler body, namely the control point A, is positioned between the front edge of the original attachment area and the highest position of the two-compartment car body.

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