A mid-mounted rear-drive vehicle with an air guide device

Abstract

The present invention provides a mid-engine rear-drive vehicle with an air guide device, which relates to the technical field of mid-engine rear-drive vehicles, and includes an engine assembly, a heat sink, a chassis, and an air guide device, wherein the engine assembly is used to provide power to the mid-engine rear-drive vehicle, the heat sink is used to cool the engine assembly, the chassis includes a frame, the frame includes a lower curved beam located at the front end of the frame, the heat sink is fixedly connected to the lower curved beam, the engine assembly is fixedly connected to the frame, one side of the air guide device is fixedly connected to the lower curved beam, and the other side of the air guide device is fixedly connected to the engine assembly, so as to guide the first airflow blown out by the heat sink to the engine assembly. The present invention can effectively reduce the temperature of the engine by adding an air guide device.

Description

Technical Field

[0001] The present invention relates to the technical field of mid-mounted rear-wheel drive vehicles, and in particular to a mid-mounted rear-wheel drive vehicle with an air guide device. Background Art

[0002] In the existing mid-engine rear-wheel drive models, the lower cover is arranged under the engine, and its main function is to block mud and water and protect the engine gear train. In the low-speed idling condition of the mid-engine rear-wheel drive model, the airflow in the engine compartment is difficult to flow out, causing the overall temperature of the engine to be high, and the problem of heat damage is prominent. The new model has a larger vehicle mass and the engine temperature rises. Since the existing lower cover has no air guide function, it cannot meet the heat dissipation function. Summary of the invention

[0003] The object of the present invention is to provide a mid-mounted rear-wheel drive vehicle with an air guide device, which has an increased air guide function and can guide the cold air blown out by the heat dissipation device to the engine component, thereby reducing the temperature of the engine.

[0004] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0005] According to one aspect of the present invention, a mid-engine rear-wheel drive vehicle with an air guide device is provided, comprising an engine assembly, a heat sink, a chassis and an air guide device, wherein the engine assembly is used to provide power to the mid-engine rear-wheel drive vehicle, the heat sink is used to cool the engine assembly, the chassis comprises a frame, the frame comprises a lower curved beam located at the front end of the frame, the heat sink is fixedly connected to the lower curved beam, the engine assembly is fixedly connected to the frame, one side of the air guide device is fixedly connected to the lower curved beam, and the other side of the air guide device is fixedly connected to the engine assembly, so as to guide a first airflow blown out by the heat sink to the engine assembly.

[0006] According to one embodiment of the present invention, the guide device includes a guide plate for guiding flow, and both sides of the guide plate are bent upward to form flanges, so that the guide plate and the chassis form an air flow channel for gas flow.

[0007] According to an embodiment of the present invention, the flange is provided with a groove corresponding to the chassis to improve the sealing performance of the air flow channel.

[0008] According to an embodiment of the present invention, the engine assembly includes an engine and a lower cover plate, wherein the engine and the lower cover plate are respectively fixed to the vehicle frame, and the lower cover plate is arranged below the engine to protect the engine;

[0009] The guide plate includes an arc-shaped portion, a horizontal portion, and an inclined portion, wherein one side of the arc-shaped portion is fixedly connected to the lower portion of the lower curved beam to guide the first airflow to the airflow channel, one side of the horizontal portion is fixedly connected to the other side of the arc-shaped portion, the middle portion of the horizontal portion is fixedly connected to the chassis and is located between the engine assembly and the heat dissipation device for guiding airflow; one side of the inclined portion is fixedly connected to the other side of the horizontal portion, and the other side of the inclined portion is fixedly connected to the lower cover plate to guide the second airflow derived from the horizontal portion to the engine.

[0010] According to an embodiment of the present invention, the elevation angle formed by the front end of the arc-shaped portion and the horizontal portion is a, wherein 18°≤a≤28°, so as to reduce the wind resistance of the mid-engine rear-wheel drive vehicle.

[0011] According to an embodiment of the present invention, the horizontal portion is provided with a plurality of drainage holes to drain condensed water in the air flow channel.

[0012] According to one embodiment of the present invention, the horizontal portion includes a rectangular segment and a trapezoidal segment, wherein one side of the rectangular segment is fixed to the arcuate portion, the long side of the trapezoidal segment is fixed to the other side of the rectangular segment, and the short side of the trapezoidal segment is fixed to the inclined portion, so as to horizontally guide the second airflow.

[0013] According to one embodiment of the present invention, the trapezoidal segment is one of an isosceles trapezoid and a right-angled trapezoid, and the angle between the straight line where the long side of the trapezoidal segment is located and the hypotenuse of the trapezoidal segment is b, wherein 10°≤b≤15°, so as to accelerate the horizontal flow of the second airflow.

[0014] According to one embodiment of the present invention, the inclined portion is inclined upward, and the angle between the inclined portion and the plane where the horizontal portion is located is c, where 20°≤c≤30°, which is used to guide the second airflow in a vertical direction so as to guide the second airflow to the engine assembly.

[0015] According to one embodiment of the present invention, the horizontal portion is provided with a first reinforcing rib, and the arc portion and the inclined portion are both provided with a second reinforcing rib, the centerline extension direction of the first reinforcing rib is the same as the movement direction of the first airflow to reduce the wind resistance to the first airflow, and the centerline extension direction of the second reinforcing rib is the same as the movement direction of the second airflow to reduce the wind resistance to the second airflow.

[0016] An embodiment of the present invention has the following advantages or beneficial effects:

[0017] The present invention increases the wind guiding function by adding the wind guiding device, and can guide the cold air blown out by the heat dissipation device to the engine component, thereby solving the problem of airflow accumulation and difficulty in flowing in the engine compartment and reducing the temperature of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0019] Figure 1 is a schematic diagram showing the connection between an air guide device and a chassis according to an exemplary embodiment.

[0020] Figure 2 is a schematic diagram showing the connection between an engine component, a heat dissipation device and an air guide device according to an exemplary embodiment.

[0021] Figure 3 is a top view of an air guiding device according to an exemplary embodiment.

[0022] Figure 4 is a front view of an air guiding device according to an exemplary embodiment.

[0023] The reference numerals are described as follows:

[0024] 1. Engine assembly; 10. Engine; 11. Lower cover; 2. Heat dissipation device; 3. Chassis; 31. Frame; 311. Lower curved beam; 32. Suspension; 33. Front axle weldment; 4. Guide device; 41. Guide plate; 411. Arc-shaped portion; 412. Horizontal portion; 4120. Drain hole; 4121. Rectangular section; 4122. Trapezoidal section; 413. Inclined portion; 414. First reinforcing rib; 415. Second reinforcing rib; 42. Flanging; 421. Groove. DETAILED DESCRIPTION

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0026] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0027] like Figures 1 to 4 As shown, Figure 1 is a schematic diagram showing the connection between the air guide device 4 and the chassis 3 according to an exemplary embodiment. Figure 2 is a schematic diagram showing the connection between an engine assembly 1, a heat dissipation device 2 and an air guide device 4 according to an exemplary embodiment. Figure 3 is a top view of an air guiding device 4 according to an exemplary embodiment. Figure 4 is a front view of an air guiding device 4 according to an exemplary embodiment.

[0028] A mid-mounted rear-drive vehicle (such as Figure 1-2 ), comprises an engine assembly 1, a heat sink 2, a chassis 3 and a guide device 4, wherein the chassis 3 comprises a frame 31, wherein the frame 31 comprises a lower curved beam 311 located at the front end of the frame 31, the heat sink 2 is fixedly connected to the lower curved beam 311, the engine assembly 1 is fixedly connected to the frame 31, the engine assembly 1 is used to provide power to a mid-engine rear-wheel drive vehicle, the heat sink 2 is used to cool the engine assembly 1, one side of the guide device 4 is fixedly connected to the lower curved beam 311, and the other side of the guide device 4 is fixedly connected to the engine assembly 1, so as to guide the first airflow blown out of the heat sink 2 to the engine assembly 1.

[0029] Among them, the heat dissipation device 2 is a radiator and a fan assembly, which is installed above the lower curved beam 311 and is used to cool the engine assembly 1. The engine assembly 1 is installed on the frame 31 through the engine suspension. The chassis 3 is used to support and install the engine assembly 1 and its various components and assemblies to form the overall shape of the car, and to receive the power of the engine assembly 1, so that the car moves and ensures normal driving. In addition, the structures and connection methods of the above components are all prior art, and this embodiment will not be repeated one by one. In addition, the front section of the guide device 4 in the present invention is connected to the lower part of the lower curved beam 311, and the rear end of the guide device 4 is connected to the front end of the engine assembly 1, which can form an air flow channel for gas circulation with the chassis 3 to guide the cold air below the heat dissipation device 2 to the engine assembly 1, so that the air flow in the engine compartment forms a flow from front to back, taking away the heat generated by the engine 10, increasing the air guide function, and solving the problem of excessive temperature in the engine compartment under idling conditions. The present invention has a novel structure and can effectively improve the working efficiency of the engine 10, extend the life of the engine 10, and improve the overall performance of the vehicle. In this embodiment, the front end and the rear end both correspond to the front end and the rear end of the vehicle body, and the cold air blown out by the heat dissipation device 2 is called the first airflow.

[0030] In a preferred embodiment of the present invention, the flow guide device 4 includes a flow guide plate 41 for guiding flow, and both sides of the flow guide plate 41 are bent upward to form flanges 42, so that the flow guide plate 41 and the bottom plate 3 form an air flow channel for gas flow. The flange 42 is provided with a groove 421 corresponding to the bottom plate 3 to improve the sealing performance of the air flow channel.

[0031] like Figure 1-3 As shown, the guide device 4 includes a guide plate 41. The guide plate 41, the flange 42 and the chassis 3 can form an air flow channel for gas flow. The groove 421 matches the chassis 3 to prevent the gas from diffusing outward from the air flow channel, so that more gas flows to the engine assembly 1, effectively reducing the temperature of the engine 10.

[0032] In a preferred embodiment of the present invention, the engine assembly 1 includes an engine 10 and a lower cover plate 11, wherein the engine 10 and the lower cover plate 11 are respectively fixed to the vehicle frame 31, and the lower cover plate 11 is disposed below the engine 10 to protect the engine 10;

[0033] The guide plate 41 includes an arc portion 411, a horizontal portion 412, and an inclined portion 413, wherein one side of the arc portion 411 is fixed to the lower portion of the lower curved beam 311 to guide the first airflow to the airflow channel, the horizontal portion 412, one side of which is fixed to the other side of the arc portion 411, the middle part of which is fixed to the chassis 3 and is located between the engine assembly 1 and the heat sink 2 for guiding airflow; the inclined portion 413, one side of which is fixed to the other side of the horizontal portion 412, and the other side of which is fixed to the lower cover plate 11 to guide the second airflow guided by the horizontal portion 412 to the engine 10. The horizontal portion 412 is provided with a plurality of drainage holes 4120 to drain the condensed water in the airflow channel.

[0034] like Figure 2 The arc-shaped portion 411 at the front end of the guide plate 41 shown can guide the first airflow from the lower part of the heat sink 2 into the airflow channel, and the second airflow guided by the horizontal portion 412 is guided to the engine 10 through the upward inclined portion 413. Since the first airflow from the heat sink 2 is cold air, condensed water will form in the airflow channel as the first airflow moves toward the engine 10. The water hole 4120 can discharge the condensed water gathered in the horizontal portion 412 to prevent moisture from entering the engine compartment, thereby protecting the equipment in the engine compartment. Figure 1The chassis 3 shown also includes a suspension 32 and a front axle weldment 33. The front axle weldment 33 is located between the curved beam 311 and the suspension 32. The front end of the lower cover 11 is connected to the suspension 32, the rear end of the lower cover 11 is fixed to the frame 31, and the middle part of the guide plate 41 is connected to the front axle weldment 33. In this embodiment, the engine 10, the lower cover 11, the suspension 32, and the front axle weldment 33 are all prior arts, and their structures and connections are not described one by one again. In the present invention, the front end of the arc portion 411 and the lower portion of the lower curved beam 311 are both provided with a first through hole, which can be connected by bolts, the middle portion of the horizontal portion 412 and the front axle welded part 33 are both provided with a second through hole, which can be connected by bolts, the inclined portion 413 is bolted to the lower cover plate 11, and an ear plate is installed on the top of the flange 42 located on the side of the inclined portion 413, and a mounting hole is provided on the ear plate for bolting to the frame 31. Through the above structure and connection, the guide plate 41 and the chassis 3 can form a U-shaped airflow channel to guide more first airflow to the engine 10, enhance the gas flow in the engine compartment, take away the heat generated by the engine 10, and reduce the temperature in the engine compartment.

[0035] In a preferred embodiment of the present invention, the elevation angle formed by the front end of the arc-shaped portion 411 and the horizontal portion 412 is a, wherein 18°≤a≤28°, so as to reduce the wind resistance of the mid-engine rear-wheel drive vehicle.

[0036] like Figure 4 As shown, the right bottom of the arc-shaped portion 411 is connected to the horizontal portion 412, and the elevation angle between the front end of the arc-shaped portion 411 and the horizontal portion 412 is a, 18°≤a≤28°, preferably 23°. This structure can reduce the influence of the guide plate 41 on the vehicle speed, and can also effectively introduce the first airflow blown out by the heat dissipation device 2 into the airflow channel, thereby improving the gas flow inside the airflow channel, and thereby effectively improving the gas flow of the airflow around the engine 10.

[0037] In a preferred embodiment of the present invention, the horizontal portion 412 includes a rectangular section 4121 and a trapezoidal section 4122, one side of the rectangular section 4121 is fixed to the arcuate portion 411, the long side of the trapezoidal section 4122 is fixed to the other side of the rectangular section 4121, and the short side is fixed to the inclined portion 413, so as to guide the second airflow horizontally. The trapezoidal section 4122 is one of an isosceles trapezoid and a right-angled trapezoid, and the angle between the straight line where the long side of the trapezoidal section 4122 is located and the hypotenuse of the trapezoidal section 4122 is b, where 20°≤b≤30°, so as to accelerate the horizontal flow of the second airflow. The inclined portion 413 is arranged to be inclined upward, and the angle between the inclined portion 413 and the plane where the horizontal portion 412 is located is c, where 10°≤c≤15°, which is used to guide the second airflow in the vertical direction, so as to guide the second airflow to the engine 10.

[0038] The rear end of the horizontal portion 412 gathers the airflow horizontally, which can increase the airflow velocity. When the angle b is greater than 30°, although the gas velocity can be increased suddenly, it will interfere with the gas flow of the whole vehicle and reduce the vehicle speed. When the angle a is less than 20°, the gas speed is low, the gas velocity is small, and the temperature around the engine 10 is slow. In this embodiment, 20°≤b≤30°, preferably 25°, so that the gas velocity in the airflow channel is optimal.

[0039] The inclined portion 413 can reduce the outlet area of ​​the airflow channel to increase the gas flow rate, so that the gas is quickly guided to the engine 10, wherein 10°≤c≤15°, preferably 13°. When the angle c exceeds 15°, the gas flow rate increases, but it will interfere with the airflow of the entire vehicle, affect the vehicle speed, and reduce the performance of the vehicle; when the angle c is less than 10°, the gas growth rate is low, and the cooling effect on the engine 10 is poor.

[0040] In a preferred embodiment of the present invention, the horizontal portion 412 is provided with a first reinforcing rib 414, and the arc portion 411 and the inclined portion 413 are both provided with a second reinforcing rib 415. The centerline extension direction of the first reinforcing rib 414 is the same as the movement direction of the first airflow to reduce the wind resistance to the first airflow, and the centerline extension direction of the second reinforcing rib 415 is the same as the movement direction of the second airflow to reduce the wind resistance to the second airflow.

[0041] Among them, a vertical third reinforcing rib is also provided on the flange 42, and the first reinforcing rib 414 is connected to part of the second reinforcing rib 415. The first reinforcing rib 414, the second reinforcing rib 415 and the third reinforcing rib can effectively enhance the overall strength of the guide plate 41, and at the same time can reduce the resistance to the airflow, and the structural design is reasonable.

[0042] In order to compare the effect of the air guide device 4, the present invention tests the maximum temperature (°C) of some components in the engine compartment of a mid-engine rear-drive vehicle with an air guide device 4 and a mid-engine rear-drive vehicle without an air guide device after idling at a speed of 50 km and a slope of 7.2%. The results are shown in Table 1 below:

[0043] Table 1 Effect of air guide on engine compartment temperature

[0044] Differential pressure sensor PCV pipe Shift cable Fire coil Body wiring harness Passenger seat panel contrast 151℃ 176℃ 146℃ 161℃ 112℃ 69℃ The present invention 113℃ 124℃ 140℃ 118℃ 102℃ 59℃ Target temperature ≤150℃ ≤150℃ ≤160℃ ≤150℃ ≤125℃ ≤65℃

[0045] In the above table, the target temperature is the tolerance temperature required by each component of the engine compartment under idle conditions, wherein the temperature of the pressure difference sensor is measured at 2 minutes, the temperature of the PCV tube is measured at 4 minutes, the temperature of the shift cable is measured at any time, the temperature of the ignition coil is measured at 4 minutes, the temperature of the vehicle body wiring harness is measured at 3 minutes, and the temperature of the passenger seat board is measured at 13 minutes. It can be seen from the above table that by adding the air guide device 4, the temperature of the pressure difference sensor, PCV tube, shift cable, ignition coil, vehicle body wiring harness and passenger seat board can be effectively reduced, and the surface temperature of the pressure difference sensor, PCV tube and ignition coil in the engine compartment can be reduced by about 30%. Therefore, the present invention can solve the problem of airflow accumulation in the engine compartment under idle conditions and reduce the temperature of the engine compartment.

[0046] Specific implementation principle:

[0047] The engine assembly 1 and the heat sink 2 are respectively mounted on the frame 31 and the lower curved beam 311 on the chassis 3, and then the deflector 41 is assembled with the chassis 3. When the vehicle is in an idling condition, the first airflow blown out by the heat sink 2 can enter the deflection channel through the deflector 41, and the deflector 41 can guide the airflow in the horizontal and vertical directions to effectively guide the gas to the engine assembly 1. Since the front end of the deflector 41 is an arc-shaped portion 411, the wind resistance of the deflector 41 to the whole vehicle can be reduced. At the same time, the first reinforcing rib 414, the second reinforcing rib 415 and the third reinforcing rib can effectively enhance the overall strength of the deflector 41. The present invention can increase the wind guiding function, effectively solve the problem of airflow accumulation in the engine compartment under idling conditions, take away the heat of the engine 10, and reduce the problem of the engine compartment.

[0048] In the embodiments of the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0049] In the description of the embodiments of the present invention, it needs to be understood that the directions or positional relationships indicated by the terms "upper" and "lower" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

[0050] In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mid-mounted rear-drive vehicle with an air guide device, characterized in that: include: An engine assembly (1) for providing power to the mid-engine rear-wheel drive vehicle; A heat dissipation device (2) for cooling the engine component (1); A chassis (3) comprising a vehicle frame (31), wherein the vehicle frame (31) comprises a lower curved beam (311) located at the front end of the vehicle frame (31), the heat dissipation device (2) is fixedly connected to the lower curved beam (311), and the engine assembly (1) is fixedly connected to the vehicle frame (31); A flow guide device (4), one side of which is fixedly connected to the lower curved beam (311) and the other side of which is fixedly connected to the engine assembly (1), so as to guide the first airflow blown out by the heat dissipation device (2) to the engine assembly (1); The flow guide device (4) comprises a flow guide plate (41) for guiding flow, both sides of the flow guide plate (41) are bent upward to form flanges (42), so that the flow guide plate (41) and the chassis (3) form an air flow channel for gas flow; the first air flow blown out by the heat dissipation device (2) can enter the flow guide channel through the flow guide plate (41), and the flow guide plate (41) can guide the air flow in horizontal and vertical directions, so as to effectively guide the gas to the engine component (1); The engine assembly (1) comprises an engine (10) and a lower cover plate (11), and the guide plate (41) comprises: An arc-shaped portion (411), one side of which is fixedly connected to the lower portion of the lower curved beam (311) so as to guide the first airflow to the airflow channel; A horizontal portion (412), one side of which is fixedly connected to the other side of the arc-shaped portion (411), a middle portion of which is fixedly connected to the chassis (3), and is located between the engine assembly (1) and the heat dissipation device (2) for guiding air; An inclined portion (413) having one side fixedly connected to the other side of the horizontal portion (412) and the other side fixedly connected to the lower cover plate (11) so as to guide the second airflow derived from the horizontal portion (412) to the engine (10); The elevation angle formed by the front end of the arc-shaped portion (411) and the horizontal portion (412) is a, wherein 18°≤a≤28°, so as to reduce the wind resistance of the mid-engine rear-wheel drive vehicle; The rear end of the horizontal portion (412) gathers the airflow horizontally, and the horizontal portion (412) comprises: A rectangular section (4121), one side of which is fixedly connected to the arc-shaped portion (411); A trapezoidal segment (4122), the long side of which is fixedly connected to the other side of the rectangular segment (4121), and the short side of which is fixedly connected to the inclined portion (413), so as to horizontally guide the second airflow; The angle between the straight line perpendicular to the long side of the trapezoidal segment (4122) and the hypotenuse of the trapezoidal segment (4122) is b, wherein 10°≤b≤15°, so as to accelerate the horizontal flow of the second airflow; The inclined portion (413) is arranged to be inclined upward, and the angle between the inclined portion (413) and the plane where the horizontal portion (412) is located is c, wherein 20°≤c≤30°, and is used to guide the second airflow in a vertical direction, so as to guide the second airflow to the engine (10).

2. The mid-engine rear-drive vehicle with an air guide device according to claim 1, characterized in that: The flange (42) is provided with a groove (421) corresponding to the bottom plate (3) to improve the sealing performance of the air flow channel.

3. The mid-engine rear-drive vehicle with an air guide device according to claim 1, characterized in that: The horizontal portion (412) is provided with a plurality of drainage holes (4120) for draining condensed water in the air flow channel.

4. The mid-engine rear-drive vehicle with an air guide device according to claim 1, characterized in that: The horizontal portion (412) is provided with a first reinforcing rib (414), and the arc-shaped portion (411) and the inclined portion (413) are both provided with a second reinforcing rib (415); the extension direction of the centerline of the first reinforcing rib (414) is the same as the movement direction of the first airflow, so as to reduce the wind resistance to the first airflow; and the extension direction of the centerline of the second reinforcing rib (415) is the same as the movement direction of the second airflow, so as to reduce the wind resistance to the second airflow.

5. The mid-engine rear-drive vehicle with an air guide device according to claim 1, characterized in that: The engine (10) and the lower cover plate (11) are respectively fixed to the vehicle frame (31), and the lower cover plate (11) is arranged below the engine (10) to protect the engine (10).

6. The mid-engine rear-drive vehicle with an air guide device according to claim 1, characterized in that: The trapezoidal segment (4122) is one of an isosceles trapezoid and a right-angled trapezoid.

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