Automobile bottom guard plate capable of reducing wind resistance

Abstract

The invention discloses an automobile bottom protection plate capable of reducing wind resistance, and belongs to the technical field of automobile wind resistance reduction. The oil tank lower protection plate body comprises an oil tank protection area, a protection plate connecting area, a wind resistance optimizing area and a strength strengthening area. The wind resistance optimization area is located at the rear end of the oil tank lower protection plate body, and a turnup plate is arranged on the wind resistance optimization area and perpendicularly arranged along the edge of the rear end of the oil tank lower protection plate body. The flanged plate can effectively improve the whole vehicle wind resistance coefficient that a rear suspension protection plate cannot be additionally arranged below a rear suspension due to an exhaust pipe and the like, and tests prove that the optimization can reduce the wind resistance by 6 counts and increase the endurance by 1.2 km.

Description

Technical Field

[0001] This application belongs to the field of automotive wind resistance reduction technology, and specifically relates to an automotive underbody protection plate that can reduce wind resistance. Background Technology

[0002] When a vehicle is traveling at high speed, wind resistance accounts for a large proportion of the vehicle's energy consumption. To reduce the overall energy consumption of a vehicle, reducing wind resistance is an effective method.

[0003] Aerodynamic drag is primarily related to the vehicle's exterior styling. However, sacrificing styling to meet drag requirements can easily lead to vehicle homogenization, making it difficult to meet individual customer needs. Moreover, compromising on styling is not a practical solution in reality. Compared to pure electric vehicles, hybrid vehicles have chassis that are difficult to fully cover with underbody protection due to fuel tanks and exhaust cooling systems, resulting in a significant increase in bottom drag. Therefore, how to minimize aerodynamic drag in areas such as the chassis where styling is not a primary concern is a question worth considering for those skilled in the art. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a vehicle underbody protection plate that can reduce wind resistance.

[0005] A car underbody protection plate that can reduce wind resistance includes a fuel tank underbody protection plate body; the fuel tank underbody protection plate body includes a fuel tank protection area, a plate connection area, a wind resistance optimization area and a strength reinforcement area; the wind resistance optimization area is located at the rear end of the fuel tank underbody protection plate body, and a flange is provided on the wind resistance optimization area, the flange being vertically arranged along the rear end edge of the fuel tank underbody protection plate body.

[0006] Preferably, the vertical height of the flange is 30mm.

[0007] Preferably, the strength-enhancing zone is located between the edge of the flange plate and the lower guard plate of the fuel tank; a right-angled triangular block is provided on the strength-enhancing zone; one right-angled face of the right-angled triangular block is fixed to the inner wall of the flange plate, and the other right-angled face is fixed to the bottom end of the lower guard plate of the fuel tank; the flange plate, the right-angled triangular block and the lower guard plate of the fuel tank are integrally formed.

[0008] Preferably, it also includes a bottom battery pack, a fuel tank, and a rear subframe; the fuel tank protection area is located at the top center of the front of the fuel tank lower guard plate body; the fuel tank protection area is used to cover the fuel tank area, and the fuel tank protection area is located behind the bottom battery pack and in front of the rear subframe of the vehicle.

[0009] Preferably, the top surface of the fuel tank protection area is smooth and has several drainage holes.

[0010] Preferably, the guard plate connection area is located around the lower guard plate body of the fuel tank and is composed of a front end connection area, a rear end connection area, and a side connection area.

[0011] Preferably, it also includes a battery pack housing, a fuel tank bracket, and a vehicle frame; the front end connection area of ​​the guard plate connects the fuel tank lower guard plate body and the rear end of the battery pack housing through the front end mounting hole of the fuel tank lower guard plate connection area; the rear end connection area of ​​the guard plate connects the fuel tank lower guard plate body and the fuel tank bracket through the rear end mounting hole of the fuel tank lower guard plate connection area; the side connection area of ​​the guard plate connects the fuel tank lower guard plate body and the vehicle frame through the side mounting hole of the fuel tank lower guard plate connection area.

[0012] Preferably, the back of the fuel tank protection area is connected by three reinforcing ribs around the front mounting hole of the fuel tank lower guard plate connection area, the rear mounting hole of the fuel tank lower guard plate connection area, and the side mounting hole of the fuel tank lower guard plate connection area.

[0013] Preferably, the height of the reinforcing rib is 15mm.

[0014] Preferably, the length of the right-angled triangular block is 45mm; in a set of right-angled triangular blocks, the spacing between adjacent right-angled triangular blocks along the edge line of the flange is 96mm.

[0015] Compared with the prior art, this application has the following advantages: For range-extended vehicles, due to factors such as exhaust and tailpipes, the underbody protection plate cannot cover the entire bottom of the vehicle. This generally results in a 10-15 count deterioration of the chassis, which corresponds to a 2-2.5 km reduction in mileage. However, by adding a flap to the fuel tank underbody protection plate, the drag can be optimized by 6 counts, greatly reducing the impact of exhaust on the overall vehicle drag. Through comparative verification, the drag reduction effect is best when the vertical length of the flap is 30mm and the angle is perpendicular to the fuel tank underbody protection plate. In addition, this bottom area is not a critical area for styling, has the least impact on the overall vehicle style, and is very easy to implement.

[0016] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the front of the lower guard plate of the fuel tank is shown; Figure 2 A schematic diagram of the back of the lower guard plate of the fuel tank is shown; Figure 3 A schematic diagram of the cross-section of the wind resistance optimization zone is shown; Figure 4 A three-dimensional schematic diagram of the lower protective plate of the fuel tank is shown.

[0019] Legend: 1. Fuel tank lower guard plate body; 2. Fuel tank protection area; 21. Leakage hole; 22. Reinforcing rib; 3. Guard plate connection area; 31. Front end connection area of ​​guard plate; 32. Front end mounting hole of fuel tank lower guard plate connection area; 33. Rear end connection area of ​​guard plate; 34. Rear end mounting hole of fuel tank lower guard plate connection area; 35. Side connection area of ​​guard plate; 36. Side mounting hole of fuel tank lower guard plate connection area; 4. Wind resistance optimization area; 41. Flanged plate; 5. Strength reinforcement area; 51. Right-angled triangular block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] A wind-resistant underbody protection plate for automobiles includes a fuel tank underbody protection plate body 1. The fuel tank underbody protection plate body 1 includes a fuel tank protection area 2, a plate connection area 3, a wind resistance optimization area 4, and a strength reinforcement area 5. The wind resistance optimization area 4 is located at the rear end of the fuel tank underbody protection plate body 1, and a flange 41 is provided on the wind resistance optimization area 4. The flange 41 is vertically arranged along the rear edge of the fuel tank underbody protection plate body 1. The vertical height of the flange 41 is 30mm. The strength reinforcement area 5 is located between the flange 41 and the fuel tank underbody protection plate body. Between the edges; a right-angled triangular block 51 is provided on the strength enhancement area 5; one right-angled face of the right-angled triangular block 51 is fixed to the inner wall of the flange plate 41, and the other right-angled face is fixed to the bottom end of the fuel tank lower guard plate body 1; the flange plate 41, the right-angled triangular block 51 and the fuel tank lower guard plate body 1 are integrally set; the length of the right-angled triangular block 51 is 45mm; in a group of the right-angled triangular blocks 51, the interval distance between adjacent right-angled triangular blocks 51 along the edge line of the flange plate 41 is 96mm.

[0022] It also includes a bottom battery pack, a fuel tank, and a rear subframe; the fuel tank protection area 2 is located at the top center of the front of the fuel tank lower guard plate body 1; the fuel tank protection area 2 is used to cover the fuel tank area, and the fuel tank protection area 2 is located behind the battery pack and in front of the rear subframe at the bottom of the vehicle; the top surface of the fuel tank protection area 2 is generally smooth and has several drainage holes 21; the guard plate connecting area 3 is located around the fuel tank lower guard plate body 1, and is composed of the front end connecting area 31, the rear end connecting area 33, and the side connecting area 35; it also includes a battery pack housing, a fuel tank bracket, and a vehicle frame; the front end connecting area 31 of the guard plate passes through the front of the fuel tank lower guard plate connecting area. The end mounting hole 32 connects the fuel tank lower guard plate body 1 and the rear end of the battery pack housing; the rear end connection area 33 of the guard plate connects the fuel tank lower guard plate body 1 and the fuel tank bracket through the rear end mounting hole 34 of the fuel tank lower guard plate connection area; the side connection area 35 of the guard plate connects the fuel tank lower guard plate body 1 and the vehicle frame through the side mounting hole 36 of the fuel tank lower guard plate connection area; the back of the fuel tank protection area 2 is connected by three reinforcing ribs 22 around the front end mounting hole 32, the rear end mounting hole 34, and the side mounting hole 36 of the fuel tank lower guard plate connection area; the height of the reinforcing ribs 22 is 15mm.

[0023] like Figure 1 and Figure 2 As shown, the fuel tank protection area 2 is the middle area of ​​the fuel tank lower guard plate body 1. This area is relatively flat and its height is consistent with the battery pack shell. Airflow is more convenient here, and a water leakage hole 21 is provided in this area to prevent rainwater from accumulating here during rainy days and when wading through water. The front end connection area 31 of the guard plate connects the fuel tank lower guard plate body 1 and the rear end of the battery pack housing through the front end mounting hole 32 of the fuel tank lower guard plate connection area; the rear end connection area 33 of the guard plate connects the fuel tank lower guard plate body 1 and the fuel tank bracket through the rear end mounting hole 34 of the fuel tank lower guard plate connection area; the side connection area 35 of the guard plate connects the fuel tank lower guard plate body 1 and the vehicle frame through the side mounting hole 36 of the fuel tank lower guard plate connection area, thus fixing the fuel tank lower guard plate body 1 in three directions: front, rear, and side.

[0024] like Figure 3 and 4 As shown, the drag optimization zone 4 is a 30mm flange 41 extending from the rear edge of the fuel tank underbody 1. This flange 41 can effectively improve the overall vehicle drag coefficient in situations where a rear suspension underbody cannot be installed due to exhaust pipes or other reasons. Tests have verified that this optimization can reduce drag by 6 counts and increase range by 1.2km.

[0025] A right-angled triangular block 51 is added at the position of the flange plate 41 for support. The specific width of the right-angled triangular block 51 is 45mm, and the interval between adjacent right-angled triangular blocks 51 is 96mm. The reinforcing rib 22 is located on the side of the lower guard plate body 1 facing the oil tank. The reinforcing rib is specifically a group of 3 ribs with a height of 15mm, which is used to enhance the structural strength of the lower guard plate body 1.

[0026] For range-extended vehicles, due to factors such as exhaust and tailpipes, the underbody protection plate cannot cover the entire bottom of the vehicle, which generally results in a chassis deterioration of 10-15 counts, corresponding to a reduction in mileage of 2-2.5km. However, by adding a flange plate 41 to the fuel tank underbody plate 1, the wind resistance can be optimized by 6 counts, greatly reducing the impact of exhaust on the overall vehicle wind resistance. Through comparative verification, the vertical length of the flange plate 41 is 30mm, and the angle is perpendicular to the fuel tank underbody plate 1, which has the best wind resistance reduction effect. In addition, this bottom is a non-critical area for styling, with the least impact on the overall vehicle style, and is very easy to implement.

[0027] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A car underbody protection plate that reduces wind resistance, characterized in that: It includes a lower protective plate body (1) for the fuel tank; the lower protective plate body (1) includes a fuel tank protection area (2), a protective plate connection area (3), a wind resistance optimization area (4) and a strength enhancement area (5); the wind resistance optimization area (4) is located at the rear end of the lower protective plate body (1), and a flange (41) is provided on the wind resistance optimization area (4), and the flange (41) is vertically arranged along the rear edge of the lower protective plate body (1).

2. The wind-resistant car underbody protection plate according to claim 1, characterized in that: The vertical height of the flange (41) is 30mm.

3. The wind-resistant car underbody protection plate according to claim 2, characterized in that: The strength enhancement zone (5) is located between the edge of the flange plate (41) and the bottom guard plate body (1) of the fuel tank; a right-angled triangular block (51) is provided on the strength enhancement zone (5); one right-angled surface of the right-angled triangular block (51) is fixed to the inner wall of the flange plate (41), and the other right-angled surface is fixed to the bottom end of the bottom guard plate body (1) of the fuel tank; the flange plate (41), the right-angled triangular block (51) and the bottom guard plate body (1) of the fuel tank are integrated.

4. A wind-resistant car underbody protection plate according to claim 3, characterized in that: It also includes a bottom battery pack, a fuel tank and a rear subframe; the fuel tank protection area (2) is located at the top center of the front of the fuel tank lower guard plate body (1); the fuel tank protection area (2) is used to cover the fuel tank area, and the fuel tank protection area (2) is located behind the bottom battery pack and in front of the rear subframe of the vehicle.

5. A wind-resistant car underbody protection plate according to claim 4, characterized in that: The top surface of the oil tank protection area (2) is generally smooth and has several water leakage holes (21).

6. A wind-resistant car underbody protection plate according to claim 5, characterized in that: The guard plate connection area (3) is located around the lower guard plate body (1) of the oil tank and is composed of the front end connection area (31), the rear end connection area (33), and the side connection area (35).

7. A wind-resistant car underbody protection plate according to claim 6, characterized in that: It also includes a battery pack housing, a fuel tank bracket, and a vehicle frame; the front end connection area (31) of the guard plate connects the fuel tank lower guard plate body (1) and the rear end of the battery pack housing through the front end mounting hole (32) of the fuel tank lower guard plate connection area; the rear end connection area (33) of the guard plate connects the fuel tank lower guard plate body (1) and the fuel tank bracket through the rear end mounting hole (34) of the fuel tank lower guard plate connection area; the side connection area (35) of the guard plate connects the fuel tank lower guard plate body (1) and the vehicle frame through the side mounting hole (36) of the fuel tank lower guard plate connection area.

8. A wind-resistant car underbody protection plate according to claim 7, characterized in that: The back of the fuel tank protection area (2) is connected by three reinforcing ribs (22) around the front mounting hole (32) of the fuel tank lower guard plate connection area, the rear mounting hole (34) of the fuel tank lower guard plate connection area, and the side mounting hole (36) of the fuel tank lower guard plate connection area.

9. A wind-resistant car underbody protection plate according to claim 8, characterized in that: The height of the reinforcing rib (22) is 15mm.

10. A wind-resistant car underbody protection plate according to claim 9, characterized in that: The length of the right-angled triangular block (51) is 45mm; in a set of the right-angled triangular blocks (51), the interval between adjacent right-angled triangular blocks (51) along the edge line of the flange plate (41) is 96mm.

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