All-terrain vehicle

Abstract

The invention provides an all-terrain vehicle which comprises a vehicle frame, a power system, a transmission system, a walking assembly, a cooling system and vehicle door assemblies, the cooling system is at least partially connected to the power system, and the vehicle door assemblies are arranged on the two sides of the all-terrain vehicle. The cooling system comprises a cooling module at least partially connected to the power system and a flow guide mechanism for guiding air for the cooling module, the flow guide mechanism comprises a flow guide shell and air inlet pieces arranged on the two sides of the flow guide shell, and a transverse plane perpendicular to the length direction of the all-terrain vehicle is defined. The projection of the air inlet pieces on the transverse plane in the length direction of the all-terrain vehicle is air inlet piece projection, the projection of the vehicle door assembly on the transverse plane in the length direction of the all-terrain vehicle is vehicle door projection, and the vehicle door projection is located between the two air inlet piece projections. The two air inlet pieces are arranged on the two sides of the vehicle door assembly, the vehicle door assembly can be used for guiding air for the air inlet pieces, the air amount entering the air inlet pieces is increased, and the cooling efficiency of the cooling system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, in particular to an all-terrain vehicle. Background Art

[0002] As a vehicle with strong passing performance and fun, all-terrain vehicles are becoming more and more popular among consumers. Among them, SSV (Side by Side Vehicle) and UTV (Utility Vehicle) are two types of all-terrain vehicles that mainly have semi-enclosed cabs.

[0003] The cooling system is an important part of the all-terrain vehicle. The cooling system can dissipate heat for the power system to ensure the operating stability of the power system. In existing all-terrain vehicles, the air intake of the cooling system is small, which leads to low cooling efficiency of the cooling system. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, an object of the present invention is to provide an all-terrain vehicle with a high air intake cooling system.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] The present invention provides an all-terrain vehicle, which includes a frame, a power system, a transmission system, a travel assembly, a cooling system and a door assembly. The frame includes a rear frame arranged at the rear of the all-terrain vehicle, the power system is arranged in the frame, the transmission system is at least partially connected to the power system, the travel assembly is at least partially connected to the transmission system, the cooling system is at least partially connected to the power system, the door assemblies are arranged on both sides of the all-terrain vehicle, the cooling system is arranged in the rear frame, the cooling system includes a cooling module at least partially connected to the power system and a guide mechanism for guiding air for the cooling module, the guide mechanism includes a guide housing and air inlet members arranged on both sides of the guide housing, defining a transverse plane perpendicular to the length direction of the all-terrain vehicle, the projection of the air inlet member on the transverse plane along the length direction of the all-terrain vehicle is the air inlet member projection, the projection of the door assembly on the transverse plane along the length direction of the all-terrain vehicle is the door projection, and the door projection is located between the two air inlet member projections.

[0007] Further, in the length direction of the all-terrain vehicle, the door assembly is located in front of the air inlet member.

[0008] Furthermore, the air inlet member includes an air inlet, an extension straight line of the air inlet is defined as an air inlet extension straight line, a longitudinal plane perpendicular to the width direction of the all-terrain vehicle is defined, a reference plane perpendicular to the height direction of the all-terrain vehicle is defined, an angle between the air inlet extension straight line and the longitudinal plane is greater than or equal to 30° and less than or equal to 70°, and an angle between the air inlet extension straight line and the reference plane is greater than or equal to 0° and less than or equal to 30°.

[0009] Furthermore, the air inlet includes an upper air inlet, which is arranged at the upper part of the air inlet. The transmission system also includes a transmission and a transmission air intake pipe, one end of the transmission air intake pipe is connected to the upper air inlet, and the other end of the transmission air intake pipe is connected to the transmission. The power system also includes an air filter and an air filter air intake pipe, one end of the air filter air intake pipe is connected to the upper air inlet, and the other end of the air filter air intake pipe is connected to the air filter.

[0010] Furthermore, the air inlet includes an upper air inlet, which is arranged at the upper part of the air inlet, and the cooling system also includes a cooling kettle, a part of the cooling kettle is connected to the power system, and another part of the cooling kettle is connected to the cooling module; in the length direction of the all-terrain vehicle, the cooling kettle is arranged behind an upper air inlet.

[0011] Furthermore, the transmission system also includes a transmission, and the transmission includes a transmission exhaust port, and the transmission exhaust port is arranged toward the rear in the length direction of the all-terrain vehicle.

[0012] Furthermore, the air guide mechanism also includes an auxiliary air inlet member, which is arranged at the front end of the air guide shell. The all-terrain vehicle also includes a seat assembly. The auxiliary air inlet member and the seat assembly partially overlap in the length direction of the all-terrain vehicle. The air guide shell, the air inlet member and the auxiliary air inlet member are integrally formed.

[0013] Furthermore, along the height direction of the all-terrain vehicle, the top of the seat assembly is set lower than the bottom of the auxiliary air inlet piece, or the top of the seat assembly is set higher than the bottom of the auxiliary air inlet piece and the top of the seat assembly is set lower than the top of the auxiliary air inlet piece.

[0014] Furthermore, a transverse plane perpendicular to the length direction of the all-terrain vehicle is defined, the projection of the air guide mechanism along the length direction of the all-terrain vehicle on the transverse plane is the projection of the air guide mechanism, the projection of the auxiliary air inlet piece along the length direction of the all-terrain vehicle on the transverse plane is the projection of the auxiliary air inlet piece, and the ratio of the dimension of the auxiliary air inlet piece projection along the width direction of the all-terrain vehicle to the dimension of the air guide mechanism projection along the width direction of the all-terrain vehicle is greater than or equal to 0.2 and less than or equal to 0.4.

[0015] Furthermore, the cooling system includes a cooling module, which is connected to the rear frame. The cooling module includes an intercooler, a radiator and a fan device. The fan device is arranged on one side of the radiator, and the intercooler is arranged on the other side of the radiator.

[0016] The present invention arranges two air inlet members on both sides of the vehicle door assembly, so that the vehicle door assembly can be used to guide air for the air inlet members, thereby increasing the amount of air entering the air inlet members and improving the cooling efficiency of the cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the all-terrain vehicle of this application.

[0018] Figure 2 A schematic diagram of the power system and transmission system of the all-terrain vehicle of the present application.

[0019] Figure 3 This is a schematic structural diagram of the cooling module and frame of the all-terrain vehicle of this application.

[0020] Figure 4 This is a side view schematic diagram of a cooling module of the all-terrain vehicle of the present application.

[0021] Figure 5 This is a schematic top view of a cooling module of the all-terrain vehicle of the present application.

[0022] Figure 6 This is a schematic diagram of the location of the cooling module of the all-terrain vehicle of this application.

[0023] Figure 7 It is a schematic top view of the flow guide mechanism of the all-terrain vehicle of the present application.

[0024] Figure 8 It is a side view schematic diagram of the air guide mechanism of the all-terrain vehicle of the present application.

[0025] Fig. 9 This is a front view schematic diagram of the flow guide mechanism of the all-terrain vehicle of the present application.

[0026] Fig.10 This is a schematic diagram of the fixed frame structure of the all-terrain vehicle cooling module of this application.

[0027] Fig.11 A schematic diagram of a fan control circuit for an all-terrain vehicle according to the present application.

[0028] Fig.12 This is a schematic diagram of the radiator structure of the all-terrain vehicle cooling module of this application.

[0029] Fig.13 This is a schematic diagram of the oil cooler and radiator structure of the all-terrain vehicle of this application.

[0030] Fig.14 This is a schematic diagram of the structure of the cooling kettle of the all-terrain vehicle of this application. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the specific implementation modes of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the implementation modes of the present invention.

[0032] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0033] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0034] In the description of the present application, it should be understood that the description “a component is located on the inner side of another component” means that one component is located on a side of the other component away from the body cover 12 or the outer surface of the all-terrain vehicle 100 .

[0035] This application provides Figure 1 The all-terrain vehicle 100 shown in the figure includes a frame 11, a body cover 12, a suspension assembly 13 and a running assembly 14. In order to clearly define the technical solution of the present application, the following are also defined: Figure 1 Front, back, left, right, top and bottom shown.

[0036] In the description of the present application, it should be understood that the term "length direction" refers to the front-to-rear direction of the vehicle parallel to the driver of the all-terrain vehicle 100 when the driver is in the driving state, the term "width direction" refers to the left-to-right direction of the vehicle parallel to the driver of the all-terrain vehicle 100 when the driver is in the driving state, and the term "height direction" refers to the up-and-down direction of the vehicle parallel to the driver of the all-terrain vehicle 100 when the driver is in the driving state.

[0037] like Figure 1 and Figure 2As shown, specifically, the all-terrain vehicle 100 further includes a power system 15 and a transmission system 16. The frame 11 is used to constitute the main frame of the all-terrain vehicle 100. The frame 11 is formed around a cockpit 101 for users to sit in, and other systems are directly or indirectly connected to the frame 11. The body cover 12 is arranged on the outside of the frame 11, and is used to cover most of the frame 11. The suspension assembly 13 is connected to the frame 11, and the suspension assembly 13 is used to connect the travel assembly 14 to the frame 11. The power system 15 is at least partially connected to the frame 11, and is used to provide driving force for the all-terrain vehicle 100. The transmission system 16 is in transmission connection with the power system 15, and the transmission system 16 receives the driving force output by the power system 15 and transmits the driving force to the travel assembly 14. The travel assembly 14 is at least partially arranged below the frame 11, and the travel assembly 14 directly or indirectly receives the driving force output by the transmission system 16 and drives the all-terrain vehicle 100 to travel. The travel assembly 14 includes a front wheel 141 disposed at the front of the all-terrain vehicle 100 and a rear wheel 142 disposed at the rear of the all-terrain vehicle 100. The all-terrain vehicle 100 in the embodiment of the present application can be various types of all-terrain vehicles 100 including SSV and UTV.

[0038] like Figure 3 and Figure 4 As shown, the all-terrain vehicle 100 includes a cooling system 27, which can assist the engine 151 in heat exchange, and the cooling system 27 can keep the engine 151 at a suitable operating temperature. The cooling system 27 includes a cooling module 271, which is connected to the rear frame 114. In the height direction of the all-terrain vehicle, the cooling module 271 is arranged above the engine 151 in the power system 15. The cooling module 271 is mainly used to dissipate heat for the engine 151. The arrangement of the cooling module 271 close to the engine 151 can improve the heat dissipation efficiency of the engine 151. The all-terrain vehicle 100 includes a body cover 12 and a seat assembly 23. The body cover 12 includes a cargo box 121 connected to the rear frame 114. In the length direction of the all-terrain vehicle 100, the cooling module 271 is arranged behind the seat assembly 23, and the cooling module 271 is arranged in front of the cargo box 121. The cooling module 271 is disposed between the seat assembly 23 and the cargo box 121, which can fully utilize the space in the frame 11 and improve the space utilization rate of the all-terrain vehicle 100. The cooling module 271 is disposed close to the power system 15, which can reduce the distance between the cooling module 271 and the engine 151, and also increase the heat dissipation efficiency. Figure 4As shown, the cooling module 271 includes an intercooler 2711, a radiator 2712 and a fan device 2713 which are integrated. The fan device 2713 is arranged on one side of the radiator 2712, and the intercooler 2711 is arranged on the other side of the radiator 2712. The intercooler 2711, the radiator 2712 and the fan device 2713 are integrated as a whole. The intercooler 2711 is used to reduce the intake temperature of the engine 151, improve the running stability of the engine 151, and improve the working efficiency of the engine 151. The radiator 2712 is connected to the engine 151. When the engine 151 is working, the high-temperature coolant generated by the engine 151 is discharged into the radiator 2712. The high-temperature coolant circulates in the radiator 2712 and cools down. The coolant after cooling down in the radiator 2712 enters the engine 151 again to cool the engine 151 and dissipate heat. The fan device 2713 drives the air flow at the positions of the intercooler 2711 and the radiator 2712, increases the air flow rate, and takes away the heat generated in the intercooler 2711 and the radiator 2712 through the air flow to achieve heat dissipation of the cooling module 271. In the embodiment of the present application, the intercooler 2711, the radiator 2712 and the fan device 2713 are integrated and installed as the cooling module 271, thereby reducing the space occupied by the intercooler 2711, the radiator 2712 and the fan device 2713, improving the space utilization rate of the all-terrain vehicle 100, and optimizing the layout space of the all-terrain vehicle 100. The integrated intercooler 2711 and the radiator 2712 share a fan device 2713 for heat dissipation, thereby improving the utilization rate of the fan device 2713 and reducing the energy consumption of the all-terrain vehicle 100.

[0039] like Figure 4 and Figure 5As shown, the extension plane of the cooling module 271 is defined as the cooling module plane 301, the axis of the fan 2713a is perpendicular to the cooling module plane 301, and the ratio of the dimension L1 of the cooling module 271 along the axis direction of the fan 2713a to the dimension L2 of the cooling module 271 along the width direction of the all-terrain vehicle is greater than or equal to 0.18 and less than or equal to 0.33. The dimension L1 of the cooling module 271 along the axis direction of the fan 2713a is the thickness of the cooling module 271, and the dimension L2 of the cooling module 271 along the width direction of the all-terrain vehicle is the length of the cooling module 271. When the ratio of the thickness to the length of the cooling module 271 is within the above range, the cooling module 271 has a larger fan device 2713, and the larger fan device 2713 can provide more cooling air volume, thereby improving the cooling effect of the cooling module 271. At the same time, the thickness of the cooling module 271 is small, which increases the degree of integration of the cooling module 271 and can reduce the space occupied by the cooling module 271 in the length direction of the all-terrain vehicle. Further, the ratio of the dimension L1 of the cooling module 271 along the axis direction of the fan 2713a to the dimension L2 of the cooling module 271 along the width direction of the all-terrain vehicle is greater than or equal to 0.2 and less than or equal to 0.3. Further, the ratio of the dimension L1 of the cooling module 271 along the axis direction of the fan device 2713 to the dimension L2 of the cooling module 271 along the width direction of the all-terrain vehicle is greater than or equal to 0.23 and less than or equal to 0.28. A transverse plane 302 perpendicular to the length direction of the all-terrain vehicle is defined, and the angle a1 between the cooling module plane 301 and the transverse plane 302 is greater than or equal to 5° and less than or equal to 30°. The cooling module 271 is tilted at a certain angle, which can make it easier for the fan device 2713 to drive the air circulation of the cooling module 271. The better the air circulation effect, the stronger the heat dissipation effect. Further, the angle a1 between the cooling module plane 301 and the transverse plane 302 is greater than or equal to 10° and less than or equal to 25°. Furthermore, the angle a1 between the cooling module plane 301 and the transverse plane 302 is greater than or equal to 15° and less than or equal to 20°. In addition, the fans 2713 a are distributed along the cooling module plane 301 .

[0040] like Figure 6As shown, a reference plane perpendicular to the height direction of the all-terrain vehicle is defined, the projection of the cooling module 271 on the reference plane along the height direction of the all-terrain vehicle is the cooling module projection, the projection of the axis of the front wheel 141 on the reference plane along the height direction of the all-terrain vehicle is the front wheel axis projection 303, the projection of the axis of the rear wheel 142 on the reference plane along the height direction of the all-terrain vehicle is the rear wheel axis projection 304, the distance from the front end of the cooling module projection to the front wheel axis projection 303 is defined as the cooling module front end distance L3, the distance from the front wheel axis projection 303 to the rear wheel axis projection 304 is defined as the drive shaft distance L4, and the ratio between the cooling module front end distance L3 and the drive shaft distance L4 is greater than or equal to 0.6 and less than or equal to 0.9. The cooling module 271 is arranged closer to the rear wheel 142, which can avoid the cooling module 271 from excessively occupying the front space of the all-terrain vehicle 100, and is beneficial to the weight distribution of the all-terrain vehicle 100, and avoids the arrangement of the cooling module 271 from increasing the front weight of the all-terrain vehicle 100. Further, the ratio between the front end distance L3 of the cooling module and the drive shaft distance L4 is greater than or equal to 0.65 and less than or equal to 0.85. Further, the ratio between the front end distance L3 of the cooling module and the drive shaft distance L4 is greater than or equal to 0.7 and less than or equal to 0.8. The projection of the rear wheel 142 on the reference plane along the height direction of the all-terrain vehicle is the rear wheel projection. In the width direction of the all-terrain vehicle, the ratio of the size L5 of the cooling module projection to the size L6 of the rear wheel projection is greater than or equal to 0.39 and less than or equal to 0.72. Controlling the size of the cooling module 271 in the width direction of the all-terrain vehicle can not only make the size of the cooling module 271 large enough to increase the cooling efficiency, but also avoid the cooling module 271 being too large and occupying the layout space of other components. Further, the ratio of the size L5 of the cooling module projection to the size L6 of the rear wheel projection is greater than or equal to 0.44 and less than or equal to 0.66. Furthermore, a ratio of a size L5 of the cooling module projection to a size L6 of the rear wheel projection is greater than or equal to 0.49 and less than or equal to 0.61.

[0041] As an embodiment, the cooling system 27 includes a guide mechanism 272 for guiding air for the cooling module 271, and the guide mechanism 272 extends substantially along the width direction of the all-terrain vehicle. Figure 7 and Figure 8As shown, the air guide mechanism 272 includes an air guide housing 2721 and an air inlet 2722 disposed at at least one end of the air guide housing 2721. The air guide housing 2721 encloses an air chamber, and the air inlet 2722 is connected to the air chamber. The air guide mechanism 272 is at least partially disposed on the vehicle frame 11, and the air guide mechanism 272 is disposed behind the seat. The air guide mechanism 272 guides air and dissipates heat for the cooling module 271, and at least a portion of the cooling module 271 is disposed in the air chamber enclosed by the air guide housing 2721. During the driving process of the all-terrain vehicle 100, the air guide mechanism 272 introduces the wind along the direction of the all-terrain vehicle 100 into the air chamber enclosed by the air guide housing 2721 through the air inlet 2722. The cooling module 271 disposed in the air chamber enclosed by the air guide housing 2721 takes away the heat generated by the air flow, thereby increasing the heat dissipation effect of the cooling module 271 of the all-terrain vehicle 100.

[0042] like Figure 7 and Figure 8As shown, the air inlet 2722 includes an air inlet 2722a, and the extension line of the air inlet 2722a is defined as the air inlet extension line 305, and a longitudinal plane 102 perpendicular to the width direction of the all-terrain vehicle is defined, and the angle a2 between the air inlet extension line 305 and the longitudinal plane 102 is greater than or equal to 30° and less than or equal to 70°. The direction of the air inlet 2722a has an important influence on the air intake volume. The direction of the air inlet 2722a is set within the above range. The air inlet 2722a can better utilize the wind guiding effect of the door assembly 29. At the same time, the direction of the air inlet 2722a also cooperates with the driving direction of the all-terrain vehicle to further increase the air intake volume. Further, the angle a2 between the first straight line and the longitudinal plane 102 is greater than or equal to 40° and less than or equal to 60°. Further, the angle a2 between the air inlet extension line 305 and the longitudinal plane 102 is greater than or equal to 45° and less than or equal to 65°. The angle a3 between the air inlet extension line 305 and the reference plane 103 is greater than or equal to 0° and less than or equal to 30°. Further, the angle a3 between the air inlet extension line 305 and the reference plane 103 is greater than or equal to 5° and less than or equal to 25°. Still further, the angle a3 between the air inlet extension line 305 and the reference plane 103 is greater than or equal to 10° and less than or equal to 20°. In the height direction of the all-terrain vehicle, the flow guide housing 2721 and the power system 15 at least partially overlap, and the overlapping arrangement improves and reduces the space utilization of the all-terrain vehicle 100. The ratio of the dimension L7 of the flow guide mechanism 272 along the width direction of the all-terrain vehicle to the dimension L8 of the flow guide housing 2721 along the width direction of the all-terrain vehicle is greater than or equal to 1.1 and less than or equal to 2.2. The air inlet members 2722 in the air guide mechanism 272 are arranged on both sides of the air guide housing 2721. The narrower the width of the air guide housing 2721, the smaller the size of the air guide housing 2721. The airflow introduced by the air inlet members 2722 can form a faster airflow in the air guide housing 2721, which is conducive to improving the heat dissipation efficiency. Further, the ratio of the dimension L7 of the air guide mechanism 272 along the width direction of the all-terrain vehicle to the dimension L8 of the air guide housing 2721 along the width direction of the all-terrain vehicle is greater than or equal to 1.3 and less than or equal to 2.1. Further, the ratio of the dimension L7 of the air guide mechanism 272 along the width direction of the all-terrain vehicle to the dimension L8 of the air guide housing 2721 along the width direction of the all-terrain vehicle is greater than or equal to 1.5 and less than or equal to 1.9. The projection of the air inlet 2722a along the length direction of the all-terrain vehicle on the transverse plane is the air inlet projection, and the area of ​​the air inlet projection is greater than or equal to 700 square centimeters and less than or equal to 1600 square centimeters. The air inlet projection refers to the projection formed on the transverse plane along the length direction of the all-terrain vehicle by the air inlets 2722a of all the air inlet members 2722 on the airflow guide mechanism 272. The size of the air inlet 2722a is set within the above range, which can not only meet the requirements of the heat dissipation air volume, but also avoid the problem of the all-terrain vehicle 100 being too wide due to the air inlet 2722a being too large.

[0043] like Figure 8 As shown, the bottom of the flow guide housing 2721 is tilted, and the space at the bottom of the flow guide housing 2721 can be used as a maintenance space for other components of the engine 151 at this position, thereby increasing the maintenance space of the all-terrain vehicle 100 for easy maintenance. The extension plane at the bottom of the flow guide housing 2721 is defined as the bottom extension surface 306, and the angle a4 between the bottom extension surface 306 and the reference plane 103 is greater than or equal to 10° and less than or equal to 30°. The bottom tilting setting of the flow guide housing 2721 can play a role in avoiding the power system 15, and at the same time, the bottom of the flow guide housing 2721 can also increase the airflow introduced into the power system 15 when the all-terrain vehicle 100 travels to it, thereby improving the passive heat dissipation efficiency of the power system 15. Further, the angle a4 between the bottom extension surface 306 and the reference plane 103 is greater than or equal to 15° and less than or equal to 25°. Further, the angle a4 between the bottom extension surface 306 and the reference plane 103 is greater than or equal to 17° and less than or equal to 22°. The air guide housing 2721 is also provided with a detachable cover. The detachable cover can increase the maintenance convenience of the components related to the power system 15 located below the air guide housing 2721. The air guide housing 2721 and the air inlet member 2722 are integrally formed, and the integrally formed setting can increase the strength. The air guide mechanism 272 can be made of plastic material. Plastic material has the characteristics of being light and portable. Using plastic material as the air guide mechanism 272 can reduce the weight of the vehicle body and improve the performance of the vehicle body.

[0044] like Figure 8As shown, the air inlet 2722a further includes an upper air inlet 2722b, and the upper air inlet 2722b is arranged at the upper part of the air inlet 2722a. The transmission system 16 includes a transmission 166 and a transmission air inlet pipe 1661, one end of the transmission air inlet pipe 1661 is connected to the upper air inlet 2722b, and the other end of the transmission air inlet pipe 1661 is connected to the transmission 166. The transmission air inlet pipe 1661 is connected between the upper air inlet 2722b and the transmission 166, and is used to provide cooling air for the transmission 166. The power system includes an air filter 153 and an air filter air inlet pipe 154, one end of the air filter air inlet pipe 154 is connected to the upper air inlet 2722b, and the other end of the air filter air inlet pipe 154 is connected to the air filter 153. The air filter 153 is used to provide a filtering effect for the intake of the engine 151 in the power system, reduce impurities in the intake air, and ensure the normal operation of the engine 151. The air filter intake pipe 154 is connected between the upper air inlet 2722b and the air filter 153, and can provide the required clean air for the air filter 153 and the engine 151. The transmission intake pipe 1661 and the air filter intake pipe 154 are connected to the same upper air inlet 2722b, which can reduce the layout length of the intake pipeline, and can also make the layout of the transmission intake pipe 1661 and the air filter intake pipe 154 more compact, which can save the rear space of the all-terrain vehicle 100. At the same time, the upper air inlet 2722b is located at a higher position in the all-terrain vehicle 100, so that the air intake position of the air filter 15 and the transmission 166 is also at a higher position, so that the air intake of the air filter 153 and the transmission 166 has better cleanliness, which can improve the operating stability of the transmission 166 and the engine 151.

[0045] like Figure 8 As shown, the transmission 166 also includes a transmission exhaust port 1662. In the length direction of the all-terrain vehicle, the transmission exhaust port 1662 is arranged toward the rear. After the transmission exhaust port 1662 is arranged toward the rear, the exhaust of the transmission 166 can be blown toward the exhaust of the engine 151. After such arrangement, the air flow at the rear of the engine 151 can be increased, and the exhaust of the engine 151 with a higher temperature can be diluted with the exhaust of the transmission 166 with a lower temperature, thereby reducing the exhaust temperature and improving the heat dissipation efficiency of the rear of the all-terrain vehicle 100.

[0046] like Fig. 9As shown, the all-terrain vehicle 100 includes a door assembly 29, which is arranged on both sides of the all-terrain vehicle 100. In the length direction of the all-terrain vehicle 100, the door assembly 29 is located in front of the air inlet member 2722. The door assembly 29 is located in front of the air inlet member 2722, which can ensure that the air inlet member 2722 will not interfere with the opening and closing of the door assembly 29. Define a transverse plane perpendicular to the length direction of the all-terrain vehicle, the projection of the air inlet member 2722 on the transverse plane along the length direction of the all-terrain vehicle 100 is the air inlet member projection, and the projection of the door assembly 29 on the transverse plane along the length direction of the all-terrain vehicle 100 is the door projection, and the door projection is located between the two air inlet member projections. Through the above arrangement, the air inlet member 2722 can be prevented from being blocked by the door assembly 29, and the door assembly 29 can also be used to guide the air for the air inlet member 2722, increase the air volume entering the air inlet member 2722, and improve the air intake efficiency of the air inlet member 2722. The air guide mechanism 272 also includes an auxiliary air inlet member 2723 disposed at the front end of the air guide housing 2721. The auxiliary air inlet member 2723 is disposed in the middle of the air guide mechanism 272 near the top. The auxiliary air inlet member 2723 has the function of assisting air intake, and simultaneously with the air inlet member 2722, air intake and air guide to the all-terrain vehicle 100. The auxiliary air inlet member 2722 can enhance the air guiding effect of the air guide mechanism 272 and enhance the heat dissipation capacity of the all-terrain vehicle 100. In the length direction of the all-terrain vehicle, the auxiliary air inlet member 2723 partially overlaps with the seat assembly 23, and the seat assembly 23 has little effect on the air intake of the partially overlapped auxiliary air inlet member 2723, while the remaining part can assist in air guiding and air intake to the maximum extent, and the partially overlapped arrangement can save space of the all-terrain vehicle 100 and enhance the space utilization rate of the all-terrain vehicle 100. The above arrangement enables the auxiliary air inlet member 2723 to be basically arranged above the seat, thereby reducing the influence of the seat on the auxiliary air inlet member 2723 in assisting air inlet and guiding air, and can enhance the auxiliary air inlet member 2723's role in assisting air inlet and guiding air. Along the height direction of the all-terrain vehicle 100, the top of the seat assembly 23 is arranged higher than the bottom of the auxiliary air inlet member 2723, and the top of the seat assembly 23 is arranged lower than the top of the auxiliary air inlet member 2723. The above arrangement enables the auxiliary air inlet member 2723 to be basically arranged above the seat, thereby reducing the influence of the seat on the auxiliary air inlet member 2723 in assisting air inlet and guiding air, and can enhance the auxiliary air inlet member 2723's role in assisting air inlet and guiding air. The auxiliary air inlet member 2723 and the seat assembly 23 partially overlap in the height direction of the all-terrain vehicle 100, which can further enhance the structural compactness of the air inlet member 2723 and the seat assembly 23. In the height direction of the all-terrain vehicle, a distance L9 between the topmost end of the air inlet member 2722 and the bottommost end of the air inlet member 2722 is greater than or equal to 650 mm and less than or equal to 1250 mm.The height dimension of the air inlet 2722 of the all-terrain vehicle is within the above range, and the air inlet 2722 can use the door assembly to increase the air intake of the air inlet 2722 as much as possible, while the arrangement of the cargo box 121 and other components will not be affected by the excessive size of the air inlet 2722. Further, the distance L9 between the top end of the air inlet 2722 and the bottom end of the air inlet 2722 is greater than or equal to 750 mm and less than or equal to 1150 mm. Furthermore, the distance L9 between the top end of the air inlet 2722 and the bottom end of the air inlet 2722 is greater than or equal to 850 mm and less than or equal to 1050 mm.

[0047] The projection of the air guide mechanism 272 on the transverse plane along the length direction of the all-terrain vehicle is defined as the air guide mechanism projection, and the projection of the auxiliary air inlet member 2723 on the transverse plane along the length direction of the all-terrain vehicle is defined as the auxiliary air inlet member projection. The auxiliary air inlet member 2723 occupies a certain proportion on the air guide mechanism 272 to better assist the air guide mechanism 272 in guiding the air. When the size of the auxiliary air inlet member 2723 on the air guide mechanism 272 accounts for less than 0.21, the size of the auxiliary air inlet member 2723 on the air guide mechanism 272 accounts for a small proportion, and the auxiliary air inlet member 2723 has a small effect of assisting the air intake and guiding the air, and has a small effect on assisting the air intake of the air guide mechanism 272. When the size of the auxiliary air inlet member 2723 on the air guide mechanism 272 accounts for more than 0.39, the size of the auxiliary air inlet member 2723 on the air guide mechanism 272 accounts for a large proportion, which affects the spatial structure of the air guide mechanism 272. In summary, the ratio of the size of the auxiliary air inlet projected along the width direction of the all-terrain vehicle to the size of the air guide mechanism projected along the width direction of the all-terrain vehicle is greater than or equal to 0.2 and less than or equal to 0.4. Further, the ratio of the size of the auxiliary air inlet projected along the width direction of the all-terrain vehicle to the size of the air guide mechanism projected along the width direction of the all-terrain vehicle is greater than or equal to 0.24 and less than or equal to 0.36. Further, the ratio of the size of the auxiliary air inlet projected along the width direction of the all-terrain vehicle to the size of the air guide mechanism projected along the width direction of the all-terrain vehicle is greater than or equal to 0.27 and less than or equal to 0.33.

[0048] like Figure 4 and Fig.10As shown, as an embodiment, the cooling module 271 also includes a fixed frame 2714, and the fixed frame 2714 is connected to the frame 11. The fixed frame 2714 includes a first mounting surface 2714a and a second mounting surface 2714b, the fan device 2713 is connected to the first mounting surface 2714a, the radiator 2712 is connected to the first mounting surface, the radiator 2712 is located between the fan device 2713 and the fixed frame 271, and the intercooler 2711 is connected to the second mounting surface. The fan device 2713, the radiator 2712 and the intercooler 2711 form a whole through the fixed frame 2714, so that the fan device 2713, the radiator 2712 and the intercooler 2711 are integrated, which saves the installation space of the all-terrain vehicle 100 and improves the space utilization rate of the all-terrain vehicle 100. At the same time, the integrated setting of the cooling module 271 can reduce the connection points of the frame 11, can reduce the installation brackets on the frame 11, and improve the assembly efficiency. When the all-terrain vehicle 100 is installed, the intercooler 2711, the radiator 2712 and the fan device 2713 can be first assembled to the fixed frame 2714, assembled to form the cooling module 271, and then installed as a whole on the frame 11, which saves the installation process and the assembly process. The extension plane of the fixed frame 2714 is defined as the fixed frame plane, and the fixed frame vertical line perpendicular to the fixed frame plane is defined. The ratio of the dimension L1 of the cooling module 271 along the fixed frame vertical line direction to the dimension L10 of the fixed frame 2714 along the width direction of the all-terrain vehicle is greater than or equal to 0.16 and less than or equal to 0.32. After the cooling module 271 is set in the above manner, the thickness of the cooling module 271 can be reduced. Furthermore, the ratio of the dimension L1 of the cooling module 271 along the fixed frame vertical line direction to the dimension L10 of the fixed frame 2714 along the width direction of the all-terrain vehicle is greater than or equal to 0.19 and less than or equal to 0.29. Furthermore, the ratio of the dimension L1 of the cooling module 271 along the vertical direction of the fixed frame to the dimension L10 of the fixed frame 2714 along the width direction of the all-terrain vehicle is greater than or equal to 0.21 and less than or equal to 0.27. In the width direction of the all-terrain vehicle, the radiator 2712 overlaps with the fixed frame 2714, and the radiator 2712 is arranged in the fixed frame 2714, so that the fixed frame 2714 can play a role in protecting the radiator 2712. The ratio of the dimension of the radiator 2712 along the vertical direction of the fixed frame to the dimension of the fixed frame 2714 along the vertical direction of the fixed frame is greater than or equal to 0.6 and less than or equal to 1.2. The thickness of the radiator 2712 is substantially the same as the thickness of the fixed frame 2714, and the radiator 2712 can be arranged in the fixed frame 2714, which can better protect the radiator 2712. Furthermore, a ratio of a dimension of the heat sink 2712 along a direction perpendicular to the fixing frame to a dimension of the fixing frame 2714 along a direction perpendicular to the fixing frame is greater than or equal to 0.7 and less than or equal to 1.1.Furthermore, the ratio of the dimension of the heat sink 2712 along the vertical direction of the fixing frame to the dimension of the fixing frame 2714 along the vertical direction of the fixing frame is greater than or equal to 0.8 and less than or equal to 1.0.

[0049] like Fig.10 As shown, at least three fan mounting seats 2714b for fixing the fan device 2713 are provided on the mounting surface 2714a, and at least three radiator mounting seats 2714c for fixing the radiator 2712 are provided on the mounting surface 2714a. The fan device 2713 and the radiator 2712 need to ensure the connection strength when they are installed on the fixed frame 2714. By respectively arranging the fan mounting seat 2714b and the radiator mounting seat 2714c on the fixed frame 2714, the connection strength of the fan device 2713 and the radiator 2712 on the fixed frame 2714 can be improved. In the vertical direction of the fixed frame, the distance between the fan mounting seat 2714b and the mounting surface 2714a is greater than or equal to the distance between the radiator mounting seat 2714c and the mounting surface 2714a. Through the above arrangement, the fan device 2713 is installed outside the radiator 2712, which is convenient for the fan device 2713 to dissipate heat from the radiator 2712. Specifically, at least two of the radiator mounting seats 2714c are plug holes and at least one is a fixing hole. The radiator 2712 is connected to the fixed frame 2714 through the plug holes and the fixing holes. The plug holes are provided to facilitate the installation of the radiator 2712 to the fixed frame 2711, reducing the difficulty of assembling the radiator 2712. The plug holes and the fixing holes cooperate with each other to improve the connection stability between the radiator 2712 and the fixed frame 2714. The fixed frame 2714 is provided with at least three connection seats 2714d for connecting the fixed frame 2714 to the frame 11. The connection seat 2714d on the fixed frame 2714 is provided as a connection structure between the cooling module 271 and the frame 11. At least three connection seats 2714d connected to the frame 11 are provided to ensure the connection reliability between the fixed frame 2714 and the frame 11, thereby improving the connection reliability between the cooling module 271 and the frame 11. The fixed frame 2714 may be made of plastic material, which is light and portable. Using plastic material as the fixed frame 2714 can reduce the weight of the vehicle body and improve the performance of the vehicle body. Plastic is a good insulator and is chemically stable. It has good corrosion resistance to chemical substances such as acid or alkali. Using plastic as the fixed frame 2714 can adapt to vehicle conditions under various conditions and extend the service life of the fixed frame 2714. The fixed frame plane is arranged parallel to the cooling module plane.

[0050] The all-terrain vehicle 100 includes a control system 26 disposed in the frame 11, and the control system 26 is at least partially connected to the fan device 2713. Fig.11As shown, the fan device 2713 includes a fan 2713a and a control circuit 2713b connected to the fan 2713a. The fan 2713a is used to generate airflow, and the flowing airflow can dissipate heat for the cooling module 271. The control circuit 2713b includes a high-speed circuit 2713c and a low-speed circuit 2713d connected in parallel. When the fan 2713a is connected to the high-speed circuit 2713c, the fan 2713a runs at a high speed. When the fan 2713a is connected to the low-speed circuit 2713d, the fan 2713a runs at a low speed. The all-terrain vehicle 100 can be set to adjust the speed of the fan 2713a according to the power of the engine 151 or according to the temperature control set in the engine 151 or the cooling module 271. When the fan device 2713 is connected to the low-speed circuit 2713d and runs at a low speed, it can reduce the energy consumption of the all-terrain vehicle 100 and increase the life of the fan device 2713. At the same time, when running at a low speed, the fan device 2713 is also quieter, which can improve the driving comfort. When the fan device 2713 is connected to the high speed circuit 2713c and runs at high speed, the heat dissipation effect of the all-terrain vehicle 100 under high temperature conditions can be improved. The control system 26 includes a vehicle controller 261 and a fan controller 262 electrically connected to the vehicle controller 261. The high speed circuit 2713c and the low speed circuit 2713d are connected in parallel to the fan controller 262. The vehicle controller 261 can output a speed control signal to control the fan controller 262 to turn on the low speed circuit 2713d or the high speed circuit 2713c. The fan controller 262 controls the fan 2713a to switch between the low speed circuit 2713d and the high speed circuit 2713c, which can improve the efficiency of the speed control of the fan 2713a. The fan controller 262 can control the fan 2713a to switch between the first fan state, the second fan state and the third fan state. When in the first fan state, the fan 2713a does not work, when in the second fan state, the fan 2713a works at a low speed, and when in the third fan state, the fan 2713a works at a high speed. The fan device 2713 includes at least two fans 2713a, and the fans 2713a are distributed along the width direction of the all-terrain vehicle 100. The plurality of fans 2713a provided in the fan device 2713 can improve the heat dissipation performance, can meet the heat dissipation requirements of the integrated cooling module 271, and can also meet the heat dissipation requirements of the high-power engine 151. The fan device 2713 includes two sets of independently provided control circuits 2713b, and the two fans 2713a are independently connected to the control circuits 2713b and can independently operate in the first fan state, the second fan state or the third fan state. The operating states of different fans 2713a are not affected by other fans 2713a, thereby improving the overall working efficiency of the fan device 2713. The cooling system 27 also includes a temperature sensor 273, which is also connected to the vehicle controller 261 to output a temperature signal to the vehicle controller 261.The temperature sensor 273 can feed back the temperature signal of the whole vehicle, so that the cooling system 27 can timely control the temperature and cool down the whole vehicle. The whole vehicle controller 261 receives the temperature signal given by the temperature sensor 273 and outputs a speed control signal to the fan controller 262 according to the temperature signal. The fan controller 262 switches between the high speed circuit 2713c and the low speed circuit 2713d according to the speed control signal. The speed of the fan 2713a can be controlled according to the temperature of the all-terrain vehicle 100. The temperature sensor 273 is arranged in the radiator 2712 or in the engine 151. The temperature sensor 273 is arranged in the radiator 2712 and the engine 151 to timely monitor the temperature of the all-terrain vehicle 100 when it is running, and feeds back to the cooling module 271 to timely cool down and dissipate heat of the all-terrain vehicle 100.

[0051] The control system 26 includes a power supply 263, and the fan controller 262 is also connected to the power supply 263. The power supply 263 supplies power to the fan controller 262, and the fan controller 262 connects the high speed circuit 2713c to the power supply 263 or connects the low speed circuit 2713d to the power supply 263 according to the speed control signal. After the fan controller 262 connects the high speed circuit to the power supply 263, the fan 2713a can run at a high speed to improve the cooling efficiency of the cooling module 271. After the fan controller 262 connects the low speed circuit to the power supply 263, the fan 2713a can run at a low speed, reducing energy consumption and noise while meeting the heat dissipation requirements. The control system 26 includes a fan fuse 264, which is arranged between the fan controller 262 and the power supply 263. The fan fuse 264 can cut off the circuit in time when an abnormality occurs in the circuit, thereby improving the safety of the operation of the all-terrain vehicle 100.

[0052] The cooling system 27 includes an oil cooler 274, which is used to cool the lubricating oil in the engine 151. Fig.12 and Fig.13As shown, the radiator 2712 includes at least one cooling chamber 2712a and a heat sink 2712b connected to the cooling chamber 2712a. The cooling chamber 2712a provides storage space for the coolant, and the heat sink 2712b cools the coolant. The heat sink 2712b can increase the contact area between the coolant and the air. The two ends of the radiator 2712 are connected to the engine 151, and the two ends of the oil cooler 274 are connected to the engine 151. The oil cooler 274 is arranged in the cooling chamber 2712a. The extension plane of the radiator 2712 is defined as the radiator plane, a radiator vertical line perpendicular to the radiator plane is defined, the projection of the oil cooler in the radiator plane along the radiator vertical line direction is defined as the oil cooler projection, the projection of the cooling chamber in the radiator plane along the radiator vertical line direction is defined as the cooling chamber projection, and the oil cooler projection is completely located in the cooling chamber projection. The oil cooler 274 is arranged in the radiator 2712. The oil cooler 274 can directly use the coolant in the radiator 2712 for cooling. Compared with the method of simply relying on air for cooling, the coolant cooling has a higher cooling efficiency. At the same time, the oil cooler 274 is arranged in the cooling chamber 2712a of the radiator 2712, which can also occupy less space and improve the space utilization. At the same time, the integrated radiator 2712 and the oil cooler 274 can also reduce the difficulty of assembly and improve the assembly efficiency of the all-terrain vehicle 100. The ratio of the projected area of ​​the oil cooler to the projected area of ​​the cooling chamber is greater than or equal to 0.31 and less than or equal to 0.59. Further, the ratio of the projected area of ​​the oil cooler to the projected area of ​​the cooling chamber is greater than or equal to 0.36 and less than or equal to 0.54. Further, the ratio of the projected area of ​​the oil cooler to the projected area of ​​the cooling chamber is greater than or equal to 0.4 and less than or equal to 0.5. The extension direction of the cooling chamber 2712a is defined as the extension direction of the cooling chamber, and the oil cooler 274 also extends along the extension direction of the cooling chamber. In the extension direction of the cooling chamber, the ratio of the size L11 of the oil cooler 274 to the size L12 of the cooling chamber 2712a is greater than or equal to 0.38 and less than or equal to 0.72. The ratio of the length of the oil cooler 274 to the cooling chamber 2712a is within the above range, which can not only improve the cooling effect of the oil cooler 274, but also ensure the accommodation space of the coolant in the cooling chamber 2712a. Further, in the extension direction of the cooling chamber, the ratio of the size L11 of the oil cooler 274 to the size L12 of the cooling chamber 2712a is greater than or equal to 0.44 and less than or equal to 0.66. Further, in the extension direction of the cooling chamber, the ratio of the size L11 of the oil cooler 274 to the size L12 of the cooling chamber 2712a is greater than or equal to 0.49 and less than or equal to 0.61. The oil cooler 274 includes an oil cooler inlet 2741 and an oil cooler outlet 2742, and the oil cooler inlet 2741 and the oil cooler outlet 2742 are respectively connected to the engine 151 through the cooling chamber. In the height direction of the all-terrain vehicle, the oil cooler inlet 2741 is located below the oil cooler outlet 2742.The high-temperature lubricating oil enters the oil cooler 274 from the oil cooler inlet 2741, and the low-temperature lubricating oil cooled in the oil cooler 274 is discharged from the oil cooler outlet 2742, thereby realizing the circulation cooling of the lubricating oil in the oil cooler 274. The oil cooler inlet 2741 is located below the oil cooler outlet 2742, and the high-temperature lubricating oil enters the oil cooler 274 from the oil cooler inlet 2741 and contacts the coolant with a lower temperature for heat exchange, thereby improving the heat exchange efficiency and reducing the cooling time of the lubricating oil.

[0053] The engine 151 includes an engine outlet (not shown) for discharging coolant and an engine inlet (not shown) for receiving coolant. The radiator 2712 includes a high temperature side cooling chamber 2712c connected to the coolant outlet and a low temperature side cooling chamber 2712d connected to the coolant inlet. The heat sink 2712b is arranged between the high temperature side cooling chamber 2712c and the low temperature side cooling chamber 2712d. The radiator inlet 2712e is arranged in the high temperature side cooling chamber 2712c, and the radiator outlet 2712f is arranged in the low temperature cooling chamber. The radiator 2712 also includes a radiator inlet 2712e arranged in the high temperature side cooling chamber 2712c and a radiator outlet 2712f arranged in the low temperature cooling chamber 2712d, the radiator inlet 2712e is connected to the engine outlet, and the radiator outlet 2712f is connected to the engine inlet. In the height direction of the all-terrain vehicle, the height of the radiator inlet 2712e is located above the radiator outlet 2712f. When the radiator 2712 is working, the high-temperature coolant first enters the high-temperature side cooling chamber 2712c of the radiator 2712 from the radiator inlet 2712e, and then enters the low-temperature side cooling chamber 1612d after being cooled by the heat sink 2712b that is set between the high-temperature side cooling chamber 2712c and the low-temperature side cooling chamber 2712d, and then is discharged from the radiator outlet 2712f after cooling the oil cooler 274, thus completing the heat dissipation. The radiator 2712 can be made of metal materials such as aluminum, copper, stainless steel or castings, and the oil cooler 274 can also be made of metal materials such as aluminum, copper, stainless steel or castings.

[0054] As an embodiment, the cooling system 27 also includes a cooling kettle 275, a part of the cooling kettle 275 is connected to the engine 151, and the other part of the cooling kettle 275 is connected to the radiator 2712. Furthermore, in the length direction of the all-terrain vehicle 100, the cooling kettle 275 is arranged behind an upper air inlet 2722b. The cooling kettle 275 is arranged behind the upper air inlet 2722b, and the air in the upper air inlet 2722b can be used to dissipate heat, thereby improving the overall heat dissipation efficiency of the cooling system 27. Specifically, the cooling kettle 275 is arranged on the side of the all-terrain vehicle 100 opposite to the transmission air duct 1661 and the air filter intake duct 154. The cooling kettle 275 and the transmission intake duct 1661 and the air filter intake duct 154 are arranged on both sides of the all-terrain vehicle 100, which can increase the space utilization on both sides of the all-terrain vehicle 100. Fig.14As shown, the cooling kettle 275 includes a kettle body 2751 and a pressure cap 2752 connected to the kettle body 2751. Specifically, the pressure cap 2752 includes a pressure valve capable of bidirectional communication. The pressure cap 2752 includes a closed state in which the kettle body 2751 is closed and a connected state in which the kettle body 2751 is connected to the air. When the pressure in the kettle body 2751 is greater than the first critical pressure and less than the second critical pressure, the pressure valve in the pressure cap 2752 is closed, so that the pressure cap 2752 is in a closed state. When the pressure in the kettle body 2751 is less than the first critical pressure or greater than the second critical pressure, the pressure valve in the pressure cap 2752 is opened, so that the pressure cap 2752 is in a connected state, and the first critical pressure is less than the second critical pressure. The cooling kettle 275 provided with the pressure cap 2752 is basically a fully enclosed environment. The closed cooling kettle 275 can reduce the loss of coolant and improve the operating stability of the cooling system 27. The cooling kettle 275 can balance the liquid level and pressure in the radiator 2712 and the engine 151, and the pressure cap 2752 can adjust the pressure of the cooling kettle 275. During the driving of the all-terrain vehicle 100, the temperature of the coolant in the engine 151 will gradually increase, and the pressure in the engine 151 will also increase. The high-temperature and high-pressure coolant in the engine 151 will affect the performance and service life of the engine 151, and there are steam bubbles in the high-temperature and high-pressure coolant. The steam bubbles will cause cavitation in the engine 151 and affect the running stability of the engine 151. After the all-terrain vehicle 100 is provided with the cooling kettle 275, the cooling kettle 275 and the engine 151 are connected, and the coolant can move in the engine 151 and the cooling kettle 275. When the pressure in the cooling kettle 275 is less than the first critical pressure, the pressure cap 2752 of the cooling kettle 275 is opened, and the air in the environment can enter the cooling kettle 275 to balance the pressure in the cooling kettle 275. When the pressure in the cooling kettle 275 is too high than the second critical pressure, the pressure cap 2752 of the cooling kettle 275 is opened, and the excess steam in the cooling kettle 275 can be discharged into the environment. By providing the cooling kettle 275 with a pressure cap 2752, it is possible to prevent the cooling system 27 from having too low or too high pressure, while ensuring that the pressure of the engine 151 is in a suitable range, thereby improving the reliability of the engine 151. Specifically, the first critical pressure is greater than or equal to -10kPa and less than or equal to 0kPa, and the second critical pressure is greater than or equal to 90kPa and less than or equal to 170kPa. Further, the first critical pressure is greater than or equal to -7kPa and less than or equal to -3kPa, and the second critical pressure is greater than or equal to 100kPa and less than or equal to 160kPa. Further, the first critical pressure is greater than or equal to -6kPa and less than or equal to -4kPa, and the second critical pressure is greater than or equal to 115kPa and less than or equal to 145kPa.

[0055] The cooling kettle 275 further includes a first degassing port 2753 for connecting to the engine 151, a second degassing port 2754 for connecting to the radiator 2712, and a water replenishing port 2755 for replenishing coolant into the radiator 2712. The first degassing port 2753 is connected to the engine 151 through a pipeline, and the pressure balance in the engine 151 can be ensured after the first degassing port 2753 and the engine 151 are connected. The second degassing port 2754 is connected to the radiator 2712 through a pipeline, and the pressure balance in the radiator 2712 can be ensured after the second degassing port 2754 and the radiator 2712 are connected. The water replenishing port 2755 is connected to the radiator 2712 through a pipeline, and the water replenishing port 2755 is used to replenish coolant into the radiator 2712, and the water replenishing port 2755 can ensure the liquid level balance in the cooling system 27. The diameter of the first degassing port 2753 is smaller than the diameter of the water replenishing port 2755, and the diameter of the second degassing port 2754 is smaller than the diameter of the water replenishing port 2755. The first degassing port 2753 and the second degassing port 2754 only need to meet the gas circulation, and the smaller diameter can also reduce the space they occupy. The radiator 2712 includes a radiator degassing port 2712g and a radiator water replenishing port 2712h. In the height direction of the all-terrain vehicle, the radiator degassing port 2712g is arranged above the radiator water replenishing port 2712h. The second degassing port 2754 in the cooling water bottle 275 is connected to the radiator 2712, and the high-temperature and high-pressure coolant and steam in the radiator 2712 are discharged into the cooling water bottle 275 through the second degassing port 2754 to reduce the air pressure in the radiator 2712 and prevent the radiator 2712 from being over-pressured. The cooling kettle 275 has a simple overall structure and a simple cooling process. The cooling kettle 275 can simultaneously satisfy the degassing functions at the engine 151 end and the radiator 2712 end.

[0056] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. An all-terrain vehicle comprising: A vehicle frame, the vehicle frame comprising a rear frame disposed at the rear of the all-terrain vehicle; a power system, the power system being supported by the vehicle frame; a transmission system at least partially connected to the power system; a travel assembly, the travel assembly being at least partially connected to the transmission system; a cooling system, the cooling system being at least partially connected to the power system; a vehicle door assembly, the vehicle door assembly being connected to the vehicle frame; Features: The cooling system is supported by the rear frame, and the cooling system includes a cooling module at least partially connected to the power system and a guide mechanism for guiding air for the cooling module, the guide mechanism includes a guide shell and air inlet pieces arranged on both sides of the guide shell; a transverse plane perpendicular to the length direction of the all-terrain vehicle is defined, the projection of the air inlet piece on the transverse plane along the length direction of the all-terrain vehicle is the air inlet piece projection, the projection of the door assembly on the transverse plane along the length direction of the all-terrain vehicle is the door projection, and the door projection is located between the two air inlet piece projections.

2. The all-terrain vehicle according to claim 1, characterized in that: In the length direction of the all-terrain vehicle, the door assembly is located in front of the air inlet member.

3. The all-terrain vehicle according to claim 1, characterized in that: The air inlet member includes an air inlet, an extension straight line of the air inlet is defined as an air inlet extension straight line, a longitudinal plane perpendicular to the width direction of the all-terrain vehicle is defined, a reference plane perpendicular to the height direction of the all-terrain vehicle is defined, an angle between the air inlet extension straight line and the longitudinal plane is greater than or equal to 30° and less than or equal to 70°, and an angle between the air inlet extension straight line and the reference plane is greater than or equal to 0° and less than or equal to 30°.

4. The all-terrain vehicle according to claim 3, characterized in that: The air inlet includes an upper air inlet, which is arranged at the upper part of the air inlet. The transmission system also includes a transmission and a transmission air intake pipe, one end of the transmission air intake pipe is connected to the upper air inlet, and the other end of the transmission air intake pipe is connected to the transmission. The power system also includes an air filter and an air filter air intake pipe, one end of the air filter air intake pipe is connected to the upper air inlet, and the other end of the air filter air intake pipe is connected to the air filter.

5. The all-terrain vehicle according to claim 3, characterized in that: The air inlet includes an upper air inlet, which is arranged at the upper part of the air inlet. The cooling system also includes a cooling kettle, a part of which is connected to the power system, and another part of which is connected to the cooling module. In the length direction of the all-terrain vehicle, the cooling kettle is arranged behind the upper air inlet.

6. The all-terrain vehicle according to claim 1, characterized in that: The transmission system further includes a transmission, and the transmission includes a transmission exhaust port. In the length direction of the all-terrain vehicle, the transmission exhaust port is arranged toward the rear.

7. The all-terrain vehicle according to claim 1, characterized in that: The air guide mechanism also includes an auxiliary air inlet member, which is arranged at the front end of the air guide shell. The all-terrain vehicle also includes a seat assembly. In the length direction of the all-terrain vehicle, the auxiliary air inlet member and the seat assembly partially overlap. The air guide shell, the air inlet member and the auxiliary air inlet member are integrally formed.

8. The all-terrain vehicle according to claim 7, characterized in that: Along the height direction of the all-terrain vehicle, the top end of the seat assembly is arranged lower than the bottom end of the auxiliary air inlet member, or The top end of the seat component is arranged higher than the bottom end of the auxiliary air inlet member, and the top end of the seat component is arranged lower than the top end of the auxiliary air inlet member.

9. The all-terrain vehicle according to claim 7, characterized in that: A transverse plane perpendicular to the length direction of the all-terrain vehicle is defined, the projection of the air guide mechanism along the length direction of the all-terrain vehicle on the transverse plane is the projection of the air guide mechanism, the projection of the auxiliary air inlet piece along the length direction of the all-terrain vehicle on the transverse plane is the projection of the auxiliary air inlet piece, and the ratio of the dimension of the auxiliary air inlet piece projection along the width direction of the all-terrain vehicle to the dimension of the air guide mechanism projection along the width direction of the all-terrain vehicle is greater than or equal to 0.2 and less than or equal to 0.

4.

10. The all-terrain vehicle according to claim 1, characterized in that: The cooling system comprises a cooling module, which is connected to the rear frame. The cooling module comprises an intercooler, a radiator and a fan device, wherein the fan device is arranged on one side of the radiator and the intercooler is arranged on the other side of the radiator.

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