Heat dissipation structure of power device and dual-fuel motorcycle

Abstract

This utility model discloses a heat dissipation structure for a power unit and a dual-fuel motorcycle, relating to the field of dual-fuel motorcycle technology. It includes a frame, an engine, and an air tank. The frame includes a top beam and a bottom frame, which form a first mounting cavity. The engine and air tank are located within the first mounting cavity, which helps to concentrate the center of gravity of the vehicle. The air tank is mounted on the upper part of the engine, and its axial direction is inclined to the horizontal plane, increasing the frontal area of ​​the outer wall of the air tank when the vehicle is in motion. The axial direction of the cylinder is parallel to the axial direction of the air tank, leaving space between the cylinder and the air tank for installing a diffuser. The diffuser has a channel that allows airflow and an air outlet facing the bottom wall of the air tank, allowing more airflow to contact the air tank. The diffuser also blocks some of the engine's heat, reducing the temperature rise of the air tank. A heat insulation plate is provided between the air tank and the gearbox, further reducing heat transfer from the engine to the air tank.

Description

Technical Field

[0001] This utility model relates to the field of dual-fuel motorcycle technology, and in particular to a heat dissipation structure for a power unit and a dual-fuel motorcycle. Background Technology

[0002] With the continuous development of the energy-saving industry, hybrid or dual-fuel motorcycles are being put into use. Natural gas is a non-toxic, odorless, and colorless gas, free of carcinogenic substances such as benzene, lead, and sulfur, and is inexpensive. It is currently widely used as a vehicle fuel, and natural gas is stored in tanks installed on vehicles. Due to the compact structure of motorcycles, for dual-fuel motorcycles that use both gasoline and natural gas, the distance between the tank and the engine is small. During vehicle operation, heat from the engine can easily be transferred to the tank, causing the tank temperature to rise and the gas pressure to increase, posing a safety risk. On the other hand, the liquefied natural gas stored in the tank has a considerable weight. Placing the tank far from the engine can lead to an uneven center of gravity, and the liquid sloshing during dynamic driving can cause center of gravity drift, affecting cornering stability. Therefore, current dual-fuel motorcycles struggle to achieve a balance between heat dissipation and center of gravity distribution. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a heat dissipation structure for a power unit and a dual-fuel motorcycle, which reduces heat conduction while increasing the vehicle's center of gravity.

[0004] A heat dissipation structure for a power device according to a first aspect embodiment of the present invention includes:

[0005] The vehicle includes a frame, an engine, and an air tank. The frame comprises a top beam and a base frame, with the base frame located below the top beam. The top beam and base frame form a first mounting cavity. The engine and air tank are located within the first mounting cavity. The air tank is mounted on top of the engine, with its axis inclined to the horizontal plane. The engine includes cylinders and a gearbox, with the cylinder axis parallel to the air tank axis. A deflector is provided between the cylinder and the air tank, with a channel allowing airflow and an air outlet facing the bottom wall of the air tank. A heat insulation plate is provided between the air tank and the gearbox.

[0006] A heat dissipation structure for a power device according to a first aspect embodiment of the present invention has at least the following beneficial effects:

[0007] This embodiment includes a frame, an engine, and an air tank. The frame includes an upper beam and a base frame, which together form a first mounting cavity. The engine and air tank are located within this cavity, which helps to concentrate the vehicle's center of gravity and improves handling stability. The air tank is mounted on top of the engine, with its axis inclined to the horizontal plane, increasing the frontal area of ​​the tank's outer wall during vehicle operation. The cylinder's axis is parallel to the air tank's axis, allowing space between the cylinder and the tank for installing a diffuser. The diffuser has a channel allowing airflow and an outlet facing the bottom wall of the air tank, thus increasing airflow contact with the tank. The diffuser also blocks some of the engine's heat, reducing the air tank's temperature rise. A heat insulation plate between the air tank and the transmission further reduces heat transfer from the engine to the tank, ensuring stable tank temperature.

[0008] According to an embodiment of the first aspect of the present invention, the chassis includes a first side tube and a second side tube, and the cylinder extends from the first mounting cavity to the outside of the chassis and is located between the first side tube and the second side tube.

[0009] According to an embodiment of the first aspect of the present invention, the frame further includes a mid-frame, which includes a first side frame and a second side frame. The first side frame and the second side frame form a second mounting cavity, which communicates with the first mounting cavity. The gas tank passes through the first mounting cavity and the second mounting cavity.

[0010] According to an embodiment of the first aspect of the present invention, both the first side frame and the second side frame are provided with a first support frame, and a first mounting sleeve is provided between the two first support frames, the first mounting sleeve being wrapped around the outer periphery of the gas tank.

[0011] According to an embodiment of the first aspect of the present invention, a first connecting frame is provided between the first side frame and the second side frame, and the gearbox is fixedly installed at the end of the first connecting frame away from the middle frame.

[0012] According to an embodiment of the first aspect of the present invention, a second support frame is provided at the end of the first connecting frame connected to the engine, the second support frame is provided with a second mounting sleeve, the second mounting sleeve is wrapped around the outer periphery of the gas tank, and a heat insulation plate is installed on the second support frame.

[0013] According to an embodiment of the first aspect of the present invention, the heat insulation plate includes a wing and a base, the base being located at the bottom of the gas tank, and the wing extending upward from both sides of the base to both sides of the gas tank.

[0014] According to an embodiment of the first aspect of the present invention, the axial direction of the gas tank is inclined to the horizontal direction, and the angle between the axial direction of the gas tank and the horizontal direction is α, defined as: 10°≤α≤15°.

[0015] According to an embodiment of the first aspect of the present invention, the engine has an air intake port and an exhaust port, the air intake port being located on the side of the cylinder facing the air tank, and the exhaust port being located on the other side of the cylinder away from the air intake port.

[0016] According to an embodiment of the second aspect of the present invention, a dual-fuel motorcycle is provided, including the heat dissipation structure of the power unit described above.

[0017] The dual-fuel motorcycle according to the second aspect of the present invention has at least the following beneficial effects:

[0018] The dual-fuel motorcycle in this embodiment features a power unit cooling structure comprising a frame, an engine, and an air tank. The frame includes a top beam and a bottom frame, which together form a first mounting cavity. The engine and air tank are located within this cavity, which helps to concentrate the vehicle's center of gravity and improve handling stability. The air tank is mounted on top of the engine, with its axis inclined to the horizontal plane, increasing the frontal area of ​​the tank's outer wall during vehicle operation. The cylinder's axis is parallel to the air tank's axis, providing space between the cylinder and the tank for installing a diffuser. The diffuser has a channel allowing airflow and an outlet facing the bottom wall of the air tank, allowing more airflow to contact the tank. The diffuser also blocks some of the engine's heat, reducing the air tank's temperature rise. A heat insulation plate between the air tank and the gearbox further reduces heat transfer from the engine to the tank, ensuring stable tank temperature.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is an isometric view of a heat dissipation structure of a power device in an embodiment of this utility model;

[0022] Figure 2 This is a cross-sectional view of the heat dissipation structure of a power device in an embodiment of this utility model.

[0023] Figure label:

[0024] Frame 100; upper beam 101; middle frame 102; first side frame 103; second side frame 104; engine 105; gearbox 106; cylinder 107; air guide 108; channel 109; air inlet 110; air outlet 111; heat insulation plate 112; base 113; wing 114; underframe 115; first side tube 116; second side tube 117; first mounting cavity 118; second mounting cavity 119; first support frame 120; first mounting sleeve 121; second support frame 122; second mounting sleeve 123; first connecting frame 124; air tank 125; air inlet 126; exhaust outlet 127. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Reference Figure 1 and Figure 2A heat dissipation structure for a power unit according to an embodiment of the present invention includes a frame 100, an engine 105, and an air tank 125. The frame 100 includes an upper beam 101, a middle frame 102, and a base frame 115. The base frame 115 is located below the upper beam 101. The middle frame 102 is connected to one end of the upper beam 101. The two ends of the base frame 115 are respectively connected to the bottom of the middle frame 102 and the upper beam 101. Thus, the upper beam 101 and the base frame 115 form a first mounting cavity 118. The engine 105 and the air tank 125 are both installed in the first mounting cavity 118, which helps to concentrate the center of gravity of the vehicle body and improve the handling stability of the vehicle.

[0030] Understandably, the mid-frame 102 includes a first side frame 103 and a second side frame 104, which together form a second mounting cavity 119, creating a stable annular structure for the frame 100. Simultaneously, the first mounting cavity 118 and the second mounting cavity 119 are connected, and the gas tank 125 passes through both cavities, allowing the frame 100 to surround the gas tank 125. This ensures the smooth accommodation of the gas tank 125 while maintaining the rigidity and strength of the frame 100, thereby improving the vehicle's handling.

[0031] Furthermore, the engine 105 includes a cylinder 107 and a transmission 106. It is understood that the length direction of the cylinder 107 is parallel to the length direction of the air tank 125, leaving space between the cylinder 107 and the air tank 125 for installing a diffuser 108. The diffuser 108 has a passage 109 that allows airflow. It is understood that the diffuser 108 is disposed between the cylinder 107 and the air tank 125. The diffuser 108 has an air inlet 110 at one end facing away from the air tank 125, and an air outlet 111 near the bottom wall of the air tank 125 at the other end. During vehicle operation, airflow can enter the passage 109 from the air inlet 110 and exit from the air outlet 111. The airflow can also contact the outer peripheral wall of the air tank 125, reducing the temperature rise of the air tank 125. Simultaneously, the diffuser 108 can block some of the heat from the engine 105, preventing the heat from the engine 105 from being directly transferred to the air tank 125.

[0032] It is understood that the axial direction of the gas tank 125 is inclined to the horizontal plane, which increases the windward area of ​​the outer peripheral wall of the gas tank 125 when the vehicle is moving, thereby helping to reduce the temperature rise of the gas tank 125. It is also understood that the axial direction of the cylinder 107 is parallel to the axial direction of the gas tank 125, and the axial direction of the gas tank 125 is inclined to the horizontal direction, with the angle α between the axial direction of the gas tank 125 and the horizontal direction defined as 10°≤α≤15°. Furthermore, it is understood that the end of the gas tank 125 located in the first mounting cavity 118 is higher than the end located in the second mounting cavity 119. Specifically, when α < 10°, the mounting layout of the gas tank 125 within the frame 100 is close to the horizontal direction, which would result in the distance between the gas tank 125 and the engine 105 being too short. This would allow heat from the engine 105 to easily transfer to the gas tank 125, causing the gas tank 125 to overheat, posing a safety risk. When α > 15°, the tilt angle of the gas tank 125 is relatively large, causing it to occupy more vertical space within the frame 100. Furthermore, since the axis of the cylinder 107 is parallel to the axis of the gas tank 125, the airflow passing through the cylinder 107 during vehicle operation will have more contact with the gas tank 125, leading to increased heat transfer and a higher temperature in the gas tank 125. Therefore, only when α satisfies the condition 10° ≤ α ≤ 15° can the heat transfer from the engine 105 to the gas tank 125 be reduced while ensuring a compact layout.

[0033] Furthermore, a heat insulation plate 112 is provided between the gas tank 125 and the gearbox 106. The heat insulation plate 112 includes a base 113 and wings 114. The base 113 is located at the bottom of the gas tank 125, and there is a gap between the base 113 and the outer peripheral wall of the gas tank 125. The wings 114 extend upward from both sides of the base 113 to both sides of the gas tank 125, which can further reduce the heat transfer from the engine 105 to the gas tank 125. Furthermore, the heat insulation plate 112 is made of engineering plastic or carbon fiber, which can avoid radiative heat transfer and reduce the heat transfer from the engine 105 to the gas tank 125.

[0034] It is understood that the underframe 115 includes a first side tube 116 and a second side tube 117, which are respectively connected to the bottom sides of the center frame 102. Thus, the center frame 102 and the underframe 115 form an integral frame containing a first mounting cavity 118 and a second mounting cavity 119, giving the frame 100 a stable structure, which is beneficial to improving the rigidity of the frame 100 and enhancing the vehicle's handling.

[0035] Understandably, the engine 105 has an air intake 126 and an exhaust port 127. The air intake 126 is located on the side of the cylinder 107 facing the air tank 125, and the exhaust port 127 is located on the other side of the cylinder 107 away from the air intake 126. Understandably, the exhaust port 127 has an exhaust pipe (not shown in the figure). The cylinder 107 can release a large amount of heat when it is working. The exhaust pipe is located on the side away from the air tank 125, which helps to reduce the heat transfer from the engine 105 to the air tank 125 and improves safety. Furthermore, the cylinder 107 extends from the first mounting cavity 118 to the outside of the frame 100 and is located between the first side pipe 116 and the second side pipe 117. This can further lower the vehicle center of gravity, leaving more space for the air tank 125, which helps to reduce the installation height of the air tank 125 and thus helps to lower the vehicle's center of gravity.

[0036] It is understood that both the first side frame 103 and the second side frame 104 are provided with a first support frame 120, and a first mounting sleeve 121 is provided between the two first support frames 120. The first mounting sleeve 121 wraps around the outer periphery of the gas tank 125 to achieve the installation and fixation of the gas tank 125 in the second mounting cavity 119. Further, a first connecting frame 124 is provided between the first side frame 103 and the second side frame 104, and the gearbox 106 is fixedly installed on the end of the first connecting frame 124 away from the center frame 102. Further, a second support frame 122 is provided at the end of the first connecting frame 124 connected to the engine 105. The second support frame 122 is provided with a second mounting sleeve 123, which wraps around the outer periphery of the gas tank 125 to achieve the installation and fixation of the gas tank 125 in the first mounting cavity 118. It is understood that the base 113 of the heat insulation plate 112 is fixedly installed on the second support frame 122.

[0037] According to an embodiment of the second aspect of this utility model, a dual-fuel motorcycle is provided, including the aforementioned heat dissipation structure for a power unit. It is understood that the dual-fuel motorcycle incorporates all the technical features of a heat dissipation structure for a power unit, and therefore the dual-fuel motorcycle includes at least all the beneficial effects of such a structure.

[0038] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A heat dissipating structure of a power device, characterized by comprising: include: The vehicle includes a frame, an engine, and an air tank. The frame comprises a top beam and a bottom frame, the bottom frame being located below the top beam. The top beam and the bottom frame form a first mounting cavity. The engine and the air tank are located within the first mounting cavity. The air tank is mounted on the upper part of the engine, and the axial direction of the air tank is inclined to a horizontal plane. The engine includes a cylinder and a gearbox. The axial direction of the cylinder is parallel to the axial direction of the air tank. A deflector is provided between the cylinder and the air tank, the deflector having a channel that allows airflow, and the deflector having an air outlet facing the bottom wall of the air tank. A heat insulation plate is provided between the air tank and the gearbox.

2. The heat dissipating structure of a power device according to claim 1, wherein The chassis includes a first side tube and a second side tube, and the cylinder extends from the first mounting cavity to the outside of the chassis and is located between the first side tube and the second side tube.

3. The heat dissipating structure of a power device according to claim 1, wherein The vehicle frame also includes a mid-frame, which includes a first side frame and a second side frame. The first side frame and the second side frame form a second mounting cavity, which communicates with the first mounting cavity. The gas tank passes through the first mounting cavity and the second mounting cavity.

4. A heat dissipating structure for a power device according to claim 3, wherein Both the first side frame and the second side frame are provided with a first support frame, and a first mounting sleeve is provided between the two first support frames. The first mounting sleeve is wrapped around the outer periphery of the gas tank.

5. The heat dissipation structure of a power device according to claim 3, characterized in that, A first connecting frame is provided between the first side frame and the second side frame, and the gearbox is fixedly installed at the end of the first connecting frame away from the middle frame.

6. A heat dissipating structure of a power device according to claim 5, wherein The first connecting frame is provided with a second support frame at the end where it is connected to the engine. The second support frame is provided with a second mounting sleeve, which is wrapped around the outer periphery of the gas tank. The heat insulation plate is installed on the second support frame.

7. The heat dissipating structure of a power device according to claim 1, wherein The heat insulation plate includes wings and a base, the base being located at the bottom of the gas tank, and the wings extending upward from both sides of the base to both sides of the gas tank.

8. The heat dissipating structure of a power device according to claim 1, wherein The axis of the gas tank is inclined to the horizontal direction, and the angle between the axis of the gas tank and the horizontal direction is α, defined as: 10°≤α≤15°.

9. The heat dissipating structure of a power device according to claim 1, wherein The engine has an air intake and an exhaust port, the air intake being located on the side of the cylinder facing the air tank, and the exhaust port being located on the other side of the cylinder opposite to the air intake.

10. A dual-fuel motorcycle, characterized in that, It includes a heat dissipation structure for a power device as described in any one of claims 1 to 9.

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