Air curtain assembly integrated in headlight cavity and vehicle

Abstract

The invention provides an air curtain assembly integrated in a headlight cavity and a vehicle, an air guide channel penetrating through the middle of the headlight assembly is arranged in the headlight assembly, an annular lamp cavity is formed in the part, located on the outer side of the air guide channel, of the headlight assembly, an inlet of the air guide channel faces the advancing direction of the vehicle and is provided with a necking air induction face, and the air induction face is provided with an air outlet. An outlet of the air guide channel faces the front wheel, and the lower portion of the side wall of the outlet of the air guide channel abuts against a front wheel cover. A wind bearing face for guiding front airflow to a front wheel is arranged in the wind guiding channel, the front airflow flowing to the front wheel forms an air curtain on the outer side of the front wheel so as to isolate the front wheel from external airflow, and the vehicle comprises an air curtain assembly integrated in the headlight cavity. According to the air curtain assembly integrated in the headlight cavity and the vehicle, the air curtain mechanism is optimized, the design freedom degree of the headlight is increased, and the light source arrangement scheme is optimized.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an air curtain assembly integrated in a headlight cavity and a vehicle. Background Art

[0002] In the vehicle manufacturing industry, aerodynamics is an important research field. Aerodynamics focuses on the interaction between vehicles and air, and the impact of these interactions on vehicles. Among them, wind resistance will increase the fuel consumption and power consumption of the vehicle, reduce acceleration, and also affect the stability and handling of the vehicle. It is an important factor affecting the stability and handling of the vehicle. Therefore, arranging air curtains on both sides of the front bumper has become a solution chosen by many vehicles.

[0003] The traditional arrangement scheme is to arrange the air curtain structure outside the lamp cavity. Due to the limited area of ​​the front guard, the above scheme needs to be optimized and improved in terms of design freedom and light source arrangement space. Summary of the invention

[0004] The present application provides an air curtain assembly and a vehicle integrated in the headlight cavity, which optimizes the air curtain mechanism, increases the design freedom, and optimizes the light source arrangement scheme.

[0005] The present application provides an air curtain assembly integrated in a headlight cavity, comprising: a headlight assembly, wherein an air guide channel is provided in the headlight assembly and passes through the middle portion of the headlight assembly, a portion of the headlight assembly located outside the air guide channel forms an annular lamp cavity, an inlet of the air guide channel faces the forward direction of the vehicle and is provided with a necked air inlet surface, an outlet of the air guide channel faces the front wheels, and a front wheel cover is abutted below a side wall of the outlet of the air guide channel; a wind-bearing surface for guiding the front airflow to the front wheels is provided in the air guide channel, and the front airflow flowing to the front wheels forms an air curtain on the outside of the front wheels to isolate the front wheels from external airflow.

[0006] Optionally, along the flow direction of the front airflow, the longitudinal cross-section of the air guide channel is streamlined and tapered.

[0007] Optionally, the headlight assembly includes a headlight body and an outer lens located on the headlight body, the air induction surface is located on the outer lens, and the wind-bearing surface is located on the headlight body; along the flow direction of the front airflow, the tail of the air induction surface is sealed and connected with the head of the wind-bearing surface, the tail of the air induction surface is a plane, and the head of the wind-bearing surface is an inclined curved surface, and the inclination angle of the tail of the inclined curved surface is α, 15°≤α≤45°.

[0008] Optionally, the side wall of the wind-bearing surface is connected to the front wheel cover via a detachable clamping structure, and a sealing structure is provided at the connection.

[0009] Optionally, the wind-bearing surface is provided with guide fins extending in the longitudinal direction.

[0010] Optionally, the number of the guide fins is at least two, and the lateral spacing between adjacent guide fins decreases along the flow direction of the front airflow.

[0011] Optionally, a turbulence generator is provided on the inner wall of the air guide channel, and the turbulence generator includes periodically arranged hemispherical protrusions.

[0012] Optionally, the air guide channel is divided into a main airflow zone, a compound control zone and a stable zone along the flow direction of the front airflow; at least two guide fins are distributed in the main airflow zone; at least two guide fins arranged in the transverse direction and a hemispherical protrusion located between two adjacent guide fins are distributed in the compound control zone; at least two hemispherical protrusions are distributed in the stable zone.

[0013] Optionally, a piezoelectric sheet is provided at the bottom of the hemispherical protrusion, the piezoelectric sheet is electrically connected to a variable frequency voltage and vibrates under the action of the variable frequency voltage, and when the piezoelectric sheet vibrates, the hemispherical protrusion is driven to vibrate.

[0014] The present application also provides a vehicle, comprising any one of the air curtain assemblies integrated in the headlight cavity as described above, wherein the number of the air curtain assemblies integrated in the headlight cavity is two and they are respectively arranged on both sides of the vehicle in the lateral direction.

[0015] The above technical solution has the following beneficial effects:

[0016] The air curtain assembly and vehicle integrated in the headlight cavity provided by the present application are formed by providing an air guide channel in the headlight assembly, and guiding the front airflow to the outside of the front wheel through the air guide channel, covering the outside of the front wheel, isolating the front wheel from the external airflow, and reducing wind resistance; at the same time, the headlight assembly is divided into two relatively independent lamp cavities by the air guide channel, and light sources can be arranged in the lamp cavity, so that the two sides of the air guide channel become areas for expressing the shape of the light source, taking into account the freedom of design of the air curtain and the headlight assembly light source and the light source arrangement space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present application, wherein:

[0018] Figure 1 A schematic structural diagram of a headlight assembly provided for an optional embodiment of the present application.

[0019] Figure 2 for Figure 1 Cross-sectional view of AA.

[0020] Description of reference numerals:

[0021] 1-headlamp assembly, 10-wind guide channel, 100-wind guide surface, 101-wind receiving surface, 11-headlamp body, 12-headlamp outer light distribution mirror, 13-annular lamp cavity.

[0022] 2-Front wheel, 20-Front wheel cover.

[0023] 3- Gas flow path. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the respective drawings. The words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to their different locations and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0025] The air curtain assembly integrated into the headlight cavity provided in the present application includes: a headlight assembly 1.

[0026] Please refer to Figure 1 The headlight assembly 1 is provided with an air guide passage 10 penetrating the headlight assembly 1, and the portion of the headlight assembly 1 located outside the air guide passage 10 forms an annular lamp cavity 13. Figure 2 The inlet of the air guiding channel 10 faces the forward direction of the vehicle and is provided with a necked air inducing surface 100 , the outlet of the air guiding channel 10 faces the front wheel 2 , and the lower side wall of the outlet of the air guiding channel 10 abuts against the front wheel cover 20 .

[0027] On the basis of not changing the overall outer contour of the headlight assembly 1, the air guide channel 10 is arranged at the lower side of the outer side of the headlight assembly 1, such as Figure 1 Shown in the dotted area.

[0028] The required light source can be configured in the annular lamp cavity 13 as needed. The inner wall of the annular lamp cavity 13 is sealed with the air guide channel 10 through a sealing scheme of inner and outer double rubber grooves or is integrally formed. The annular lamp cavity is installed on the vehicle body through structures such as snap-on, connecting brackets, and bolt connections.

[0029] Figure 2 The direction of the middle arrow B is the flow direction of the front airflow. The air guide channel 10 is provided with a wind-bearing surface 101 which guides the front airflow entering from the wind-inducing surface 100 to the front wheel 2. The front airflow flowing to the front wheel 2 forms an air curtain 3 on the outside of the front wheel 2 to isolate the front wheel 2 from the external airflow.

[0030] The air curtain assembly integrated in the headlamp cavity provided by the present application is provided with an air guide channel 10 in the headlamp assembly 1, and the front airflow is guided to the outside of the front wheel 2 through the air guide channel 10 to form an air curtain 3, which covers the outside of the front wheel 2, isolates the front wheel 2 from the external airflow, and reduces wind resistance; at the same time, the headlamp assembly 1 is divided into an annular lamp cavity 13 by the air guide channel 10, and the light source can be arranged in the entire area of ​​the annular lamp cavity 13, so that the two sides of the air guide channel 10 become the areas for expressing the shape of the light source, taking into account the freedom of design of the air curtain 3 and the headlamp assembly 1 light source and the light source arrangement space.

[0031] In an optional embodiment, along the flow direction of the front airflow, the longitudinal cross-section of the air guide channel 10 is streamlined and tapered. That is, along the height direction of the vehicle body, the inner wall of the air guide channel 10 is a continuous and smooth arc-shaped wall surface that matches the flow direction of the front airflow, and the inner diameter of the air guide channel 10 gradually decreases along the flow direction of the front airflow. The embodiment of the present application can accelerate the front airflow in the air guide channel 10, thereby enhancing the momentum of the air curtain 3, effectively penetrating the turbulent zone caused by the front wheel 2 during the rotation process, and effectively isolating the front wheel 2 from the external airflow. At the same time, the streamlined tapered setting can also prevent the front airflow from forming a large vortex in the air guide channel 10 to reduce energy loss.

[0032] In an optional embodiment, the headlight assembly 1 includes a headlight body 11 and an outer headlight lens 12 located on the headlight body 11, the air inducing surface 100 is located on the outer headlight lens 12, and the wind-bearing surface 101 is located on the headlight body 11. Along the flow direction of the front airflow, the tail of the air inducing surface 100 is sealed and docked with the head of the wind-bearing surface 101. The tail of the air inducing surface 100 is a plane, and the head of the wind-bearing surface 101 is an inclined curved surface. Along the flow direction of the front airflow, the tail inclination angle of the inclined curved surface is α, 15°≤α≤45°. In the embodiment of the present application, the inclined curved surface structure of the wind-bearing surface 101 converts the flat jet at the entrance of the air guide channel 10 into a spatial spiral flow, and absorbs the surrounding airflow through the Coanda effect (the fluid will "stick" to the curved surface and will not rush out directly), thereby increasing the thickness of the air curtain 3. If °θ<15°, the front airflow is under-turned, causing the junction between the air guide channel 10 and the front wheel cover 20 to move backward, increasing the occupied space; when θ>45°, the front airflow has too much impact on the wind-bearing surface 101, resulting in excessive pressure drop loss of the front airflow, and the penetration of the air curtain 3 into the turbulent area is reduced, which is not conducive to the stability of the air curtain 3.

[0033] A flexible sealing layer is provided at the position where the tail of the wind-inducing surface 100 and the head of the wind-bearing surface 101 are connected to each other. The material of the flexible sealing layer is silicone rubber or thermoplastic elastomer.

[0034] In an optional embodiment, the side wall of the wind-bearing surface 101 is connected to the front wheel cover 20 through a detachable snap-fit ​​structure, and a sealing structure is provided at the connection. In the embodiment of the present application, the bottom of the side wall of the wind-bearing surface 101 and the top of the front wheel cover are respectively provided with matching buckles and snap-fit ​​interfaces for snap-fitting. Sealing structures such as sealing gaskets and sealing rings are provided at the snap-fitting points between the two to prevent the front airflow from flowing backward from the front wheel cover 20 and the joint between the front wheel cover 20 and the wind-bearing surface 101, thereby increasing the stability of the front airflow.

[0035] In an optional embodiment, the wind-bearing surface 101 is provided with guide fins extending in the longitudinal direction. In the embodiment of the present application, the guide fins can be a fish-fin-shaped structure installed on the wind-bearing surface 101 or a plate-shaped structure whose thickness gradually decreases in the height direction. The guide fins divide the front airflow into multiple parallel sub-flow channels, and suppress the lateral flow (along the lateral direction of the vehicle body, the lateral direction hereinafter is the same as this direction) of the front airflow through the shear force of the wall, thereby reducing the turbulent tendency of the front airflow. Moreover, the guide fins can reduce the momentum exchange between the front airflow and the surrounding environment, and reduce the flow velocity attenuation of the front airflow at the outlet.

[0036] Furthermore, the outer surface of the guide fin is provided with a groove extending in the longitudinal direction, which forces the airflow to flow along the groove to prevent the front airflow from running sideways, thereby delaying the separation of the front airflow to produce a large vortex, and making the front airflow into the air guide channel 10 more stable.

[0037] In an optional embodiment, the number of the guide fins is at least two, and the lateral spacing between adjacent guide fins decreases along the flow direction of the front airflow. The lateral spacing of the guide fins in the front is larger, which allows more front airflow to enter, reduces the local flow velocity gradient at the inlet, and reduces the risk of flow separation; the lateral spacing in the rear decreases to form a tapered flow channel, accelerates the front airflow to enhance the momentum of the air curtain 3. In addition, the decreasing lateral spacing of the guide fins can destroy the generation of large-scale vortices and force the airflow to adhere to the surface of the wind guide channel 10 and the guide fins, reducing the energy loss of the front airflow and increasing the stability of the front airflow.

[0038] In an optional embodiment, the inner wall of the air guide channel 10 is provided with a turbulence generator, and the turbulence generator includes periodically arranged hemispherical protrusions. The periodic arrangement means that the hemispherical protrusions are arranged in at least two rows along the flow direction of the front airflow in the air guide channel 10, and each row is arranged with at least two in the horizontal direction. During the flow process, the flow velocity of the part of the front airflow flowing close to the inner wall of the air guide channel 10 will slow down due to the friction with the inner wall, and the periodically arranged hemispherical protrusions can play a "stirring" role, stirring the slow airflow close to the inner wall of the air guide channel 10 to mix with the airflow in the middle to form micro-vortices, reduce the energy loss caused by friction, and make the overall flow of the front airflow more stable and uniform, so as to ensure the stability of the air curtain 3. Among them, the height of the hemispherical protrusion can be 1 / 5-1 / 3 of the vertical height of the air guide channel 10 at the location, so as to achieve a better "stirring" effect.

[0039] In an optional embodiment, the air guide channel 10 is divided into a main flow area, a composite control area and a stable area in sequence along the flow direction of the front airflow. The main flow area is provided with at least two transversely arranged guide fins to centrally guide the flow direction of the front airflow and establish a laminar basic flow field. The composite control area is provided with at least two transversely arranged guide fins and a hemispherical protrusion between two adjacent guide fins to achieve flow segmentation and micro-vortex coordination. The stable area is provided with at least two hemispherical protrusions, which are arranged transversely or along the flow direction of the front airflow to strengthen and stabilize the front airflow and suppress outlet turbulence.

[0040] In an optional embodiment, a piezoelectric sheet is provided at the bottom of the hemispherical protrusion, and the piezoelectric sheet is electrically connected to a variable frequency voltage and vibrates under the action of the variable frequency voltage, and the piezoelectric sheet drives the hemispherical protrusion to vibrate when it vibrates. In an embodiment of the present application, the piezoelectric sheet is made of a piezoelectric material, and a variable frequency mechanical deformation occurs when a variable frequency voltage is applied, thereby driving the hemispherical protrusion to vibrate. The piezoelectric sheet can be made of an inorganic piezoelectric material such as quartz, lithium niobate (LiNbO), lithium tantalate, or an organic piezoelectric material such as polyvinylidene fluoride, or a composite material of an inorganic piezoelectric material and an organic piezoelectric material.

[0041] Specifically, the piezoelectric sheet is arranged at the bottom of the hemispherical protrusion, and an adhesive layer is arranged around it and is bonded and connected to the bottom of the hemispherical protrusion through an adhesive layer with a certain elasticity such as epoxy resin. When the piezoelectric sheet is electrically connected to a variable frequency voltage, variable frequency vibration occurs under the action of the variable frequency voltage, thereby driving the hemispherical protrusion connected to it to vibrate.

[0042] Furthermore, the outer surface of the hemispherical protrusion may be provided with a groove, the depth of which may be 10-50 um. The groove cooperates with the piezoelectric sheet to transform the laminar airflow into directional small eddies, thereby reducing energy consumption and improving the boundary layer stability of the air curtain 3.

[0043] In an optional embodiment, the inner wall surface of the air guide channel 10 is covered with a hydrophobic coating, and the contact angle of the hydrophobic coating is greater than 120°, which is used to reduce the adhesion of pollutants in the front airflow to the air guide channel 10 and increase the stability of the air curtain 3.

[0044] The present application also provides a vehicle, comprising an air curtain assembly integrated in a headlight cavity as described in any one of the above embodiments, wherein the number of the air curtain assemblies integrated in the headlight cavity is two and they are respectively arranged on both sides of the vehicle in the lateral direction, and air curtains 3 are provided on the front of both sides of the vehicle to evenly reduce the wind resistance on both sides of the vehicle.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An air curtain assembly integrated in a headlight cavity, characterized in that: include: A headlight assembly, wherein an air guide passage penetrating the middle of the headlight assembly is provided in the headlight assembly, a portion of the headlight assembly located outside the air guide passage forms an annular lamp cavity, an inlet of the air guide passage faces the vehicle forward direction and is provided with a necked air guide surface, an outlet of the air guide passage faces the front wheel, and a front wheel cover is abutted below a side wall of the outlet of the air guide passage; The air guide channel is provided with a wind-bearing surface for guiding the front airflow to the front wheels. The front airflow flowing to the front wheels forms an air curtain on the outside of the front wheels to isolate the front wheels from the external airflow.

2. The air curtain assembly integrated into the headlight cavity according to claim 1, characterized in that: Along the flow direction of the front airflow, the longitudinal cross-section of the air guide channel is streamlined and tapered.

3. The air curtain assembly integrated into the headlight cavity according to claim 1, characterized in that: The headlamp assembly comprises a headlamp body and a headlamp outer light distribution mirror located on the headlamp body, the wind inducing surface is located on the headlamp outer light distribution mirror, and the wind receiving surface is located on the headlamp body; Along the flow direction of the front airflow, the tail of the wind-inducing surface is sealed and connected with the head of the wind-bearing surface. The tail of the wind-inducing surface is a plane, and the head of the wind-bearing surface is an inclined curved surface. The inclination angle of the tail of the inclined curved surface is α, 15°≤α≤45°.

4. The air curtain assembly integrated into the headlight cavity according to claim 1, characterized in that: The side wall of the wind-bearing surface is connected to the front wheel cover through a detachable clamping structure, and a sealing structure is provided at the connection.

5. The air curtain assembly integrated into the headlight cavity according to claim 1, characterized in that: The wind-bearing surface is provided with guide fins extending in the longitudinal direction.

6. The air curtain assembly integrated into the headlight cavity according to claim 5, characterized in that: The number of the guide fins is at least two, and the lateral spacing between adjacent guide fins decreases along the flow direction of the front airflow.

7. The air curtain assembly integrated into the headlight cavity according to claim 6, characterized in that: The inner wall of the air guide channel is provided with a turbulence generator, and the turbulence generator includes periodically arranged hemispherical protrusions.

8. The air curtain assembly integrated into the headlight cavity according to claim 7, characterized in that: The air guide channel is divided into a main flow area, a composite control area and a stable area in sequence along the flow direction of the front airflow; At least two guide fins are distributed in the main flow area; At least two guide fins arranged in the transverse direction and a hemispherical protrusion located between two adjacent guide fins are distributed in the composite control area; At least two hemispherical protrusions are distributed in the stabilizing area.

9. The air curtain assembly integrated into the headlight cavity according to claim 7, characterized in that: A piezoelectric sheet is provided at the bottom of the hemispherical protrusion. The piezoelectric sheet is electrically connected to a variable frequency voltage and vibrates under the action of the variable frequency voltage. When the piezoelectric sheet vibrates, the hemispherical protrusion is driven to vibrate.

10. A vehicle, characterized in that: It comprises the air curtain assembly integrated in the headlight cavity as described in any one of claims 1 to 9, wherein the number of the air curtain assemblies integrated in the headlight cavity is two and they are respectively arranged on both sides of the vehicle in the lateral direction.

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