Cooling circulation system for a positive three-wheeled motorcycle

Abstract

The utility model relates to a cooling circulation system for positive tricycle motorcycle, including engine, engine crane, frame, engine outlet pipe, three -way valve, radiator inlet pipe, radiator, radiator outlet pipe, auxiliary water tank and engine inlet pipe, one end of engine outlet pipe communicates with the water outlet of engine, and the other end communicates with the water inlet of three -way valve, one end of radiator inlet pipe communicates with the first water outlet of three -way valve, and the other end communicates with the water inlet of radiator, one end of radiator outlet pipe communicates with the water outlet of radiator, and the other end communicates with the water inlet of auxiliary water tank, one end of engine inlet pipe communicates with the water outlet of auxiliary water tank, and the other end communicates with the water inlet of engine, the utility model can promote engine heat dissipation efficiency, solve engine high temperature problem, can satisfy winter cab heating demand again, strengthens system stability simultaneously, prolongs the life and reduces user maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of cooling technology for power systems of three-wheeled motorcycles, and in particular to a cooling circulation system for three-wheeled motorcycles. Background Technology

[0002] Three-wheeled motorcycles are widely used in urban and rural logistics and short-distance delivery due to their strong carrying capacity and flexible maneuverability. The stability of the engine's operating temperature directly affects the vehicle's reliability, power efficiency, and service life. Long-term high engine temperature can lead to power loss, increased fuel consumption, and even cause failures such as piston ring wear and cylinder wall scoring, shortening the overhaul cycle and increasing usage and maintenance costs. Therefore, an efficient cooling circulation system is the key to ensuring its all-weather, high-load operation.

[0003] The cooling systems of existing three-wheeled motorcycles, especially cargo-type models with a cab, mostly consist of only a radiator and a heater, with a simplified structure and circulation logic. Due to space constraints, the radiator is often located inside the seat or at the front of the engine; the heater, to provide heating in winter, is installed below the dashboard. The water circulation uses a series design, with the circulation flow as follows: engine outlet → heater → radiator → engine inlet. The coolant must flow through both in sequence before returning.

[0004] This design has significant drawbacks during high-temperature seasons: First, the series path leads to delayed heat dissipation. The 90-100℃ high-temperature coolant discharged from the engine does not directly enter the radiator for cooling but must first flow through the heater. The heater's pipes lack heat dissipation design and have resistance, making it difficult for the coolant to release heat before entering the radiator. Furthermore, the increased flow distance between the heater and the radiator further reduces efficiency, resulting in the coolant returning at a high temperature and failing to effectively cool down. Second, the sudden change in water pipe diameter leads to insufficient circulation flow. The water pipe diameter at the engine is usually Ф23, but at the heater, it is reduced to Ф12 due to space constraints. The reduced pipe cross-sectional area leads to a sharp increase in flow resistance and a significant decrease in flow rate under the same pressure. When the engine generates more heat during high-temperature seasons, the coolant cannot heat up in time, exacerbating the high temperature and creating a vicious cycle.

[0005] In summary, existing systems suffer from low heat dissipation efficiency due to abrupt changes in series path and pipe diameter. This makes it difficult to control engine temperature during hot seasons, impacting vehicle performance and stability, shortening engine life, increasing maintenance costs and downtime risks, and failing to meet the demands of complex operating conditions. Therefore, designing a cooling circulation system that can balance high-temperature heat dissipation and winter heating, while adapting to spatial layouts, has become a pressing issue for the industry. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a cooling circulation system for three-wheeled motorcycles. By optimizing the radiator layout and adopting a seasonally adaptable water circuit and pipe diameter design controlled by a three-way valve, it can significantly improve the engine cooling efficiency of three-wheeled motorcycles in high-temperature seasons, solve the high-temperature problem, meet the heating needs of the cab in winter, enhance system stability, extend engine life, and reduce user maintenance costs, thus fully adapting to the complex operating conditions of three-wheeled motorcycles.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a cooling circulation system for a three-wheeled motorcycle, including an engine, an engine hanger, a frame, an engine water outlet pipe, a three-way valve, a radiator water inlet pipe, a radiator, a radiator water outlet pipe, an auxiliary water tank, and an engine water inlet pipe;

[0008] The engine is fixedly mounted on the engine mount, and the engine mount is fixedly connected to the vehicle frame by bolts; one end of the engine water outlet pipe is connected to the engine water outlet, and the other end is connected to the water inlet of the three-way valve; one end of the radiator water inlet pipe is connected to the first water outlet of the three-way valve, and the other end is connected to the water inlet of the radiator; the radiator is fixedly mounted on the side of the vehicle frame by bolts; one end of the radiator water outlet pipe is connected to the radiator water outlet, and the other end is connected to the water inlet of the auxiliary water tank; one end of the engine water inlet pipe is connected to the water outlet of the auxiliary water tank, and the other end is connected to the water inlet of the engine, so as to form a cooling circulation loop.

[0009] Furthermore, it also includes a heater, a heater inlet pipe, and a heater outlet pipe;

[0010] One end of the heater's inlet pipe is connected to the second outlet of the three-way valve, and the other end is connected to the heater's inlet; one end of the heater's outlet pipe is connected to the heater's outlet, and the other end is connected to the radiator's inlet.

[0011] Furthermore, the three-way valve can selectively switch the water circuit: when it is a high-temperature season, the three-way valve closes the second outlet connected to the heater inlet pipe, so that the coolant flows back to the engine in sequence through the engine outlet pipe, the three-way valve, the radiator inlet pipe, the radiator, the radiator outlet pipe, the auxiliary water tank and the engine inlet pipe;

[0012] When it is a cold season, the three-way valve opens the second outlet connected to the heater inlet pipe, so that the coolant flows back to the engine in sequence through the engine outlet pipe, the three-way valve, the heater inlet pipe, the heater, the heater outlet pipe, the radiator, the radiator outlet pipe, the auxiliary water tank and the engine inlet pipe.

[0013] Furthermore, the diameter of the engine water outlet pipe, radiator water inlet pipe, radiator water outlet pipe, and engine water inlet pipe is all Ф23, and the diameter of the heater water inlet pipe and heater water outlet pipe is all Ф12.

[0014] Furthermore, the front panel of the radiator is positioned facing outwards from the vehicle frame to increase the ventilation at the radiator.

[0015] Furthermore, the auxiliary water tank is fixedly installed inside the seat bucket and located at the front end of the engine.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model increases ventilation by arranging the radiator on the side of the vehicle frame and optimizing the windward angle, thereby improving the heat exchange efficiency of the radiator fins. The large circulation path with a full Ф23 diameter pipe in summer avoids the flow rate reduction caused by sudden changes in pipe diameter in the prior art, and increases the circulation flow rate per unit time, which can quickly remove the heat generated by the engine under high load, and control the maximum operating temperature of the engine below 90℃ in the high-temperature season, thus solving the problem of high engine temperature.

[0018] 2. This utility model uses a three-way valve to achieve selective switching of the water circuit. In summer, it uses a large circulation that does not pass through the heater to focus on heat dissipation, while in winter, it provides heating through the heater branch circuit. While meeting the heating needs of the cab in winter, it ensures stable engine operating temperature and can be adapted to all seasons without additional equipment.

[0019] 3. This utility model can replenish coolant loss in real time and balance system pressure by adding an auxiliary water tank, avoiding air lock phenomenon; the entire pipeline adopts high temperature resistant sealed connection, and there is no leakage during long-term operation, which significantly reduces the risk of water pump and pipeline failure. Attached Figure Description

[0020] Figure 1 This is a top view of the overall structure of this utility model.

[0021] Figure 2 This is a three-dimensional structural diagram of the overall structure of this utility model.

[0022] In the diagram: 1. Engine; 2. Engine mount; 3. Chassis; 4. Engine outlet pipe; 5. Three-way valve; 6. Radiator inlet pipe; 7. Radiator; 8. Radiator outlet pipe; 9. Engine inlet pipe; 10. Auxiliary water tank; 11. Heater inlet pipe; 12. Heater; 13. Heater outlet pipe. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] This utility model discloses a cooling circulation system for a three-wheeled motorcycle.

[0025] Reference Figure 1 and Figure 2 A cooling circulation system for a three-wheeled motorcycle includes an engine 1, an engine mount 2, a frame 3, an engine outlet pipe 4, a three-way valve 5, a radiator inlet pipe 6, a radiator 7, a radiator outlet pipe 8, an engine inlet pipe 9, an auxiliary water tank 10, a heater inlet pipe 11, a heater 12, and a heater outlet pipe 13. The installation and connection relationships of each component are as follows.

[0026] Engine 1 is fastened to the bearing surface of engine mount 2 by bolts. Engine mount 2 is fixedly connected to the longitudinal beam welding point of frame 3 by bolts, ensuring that engine 1 does not move during vehicle operation and ensuring the sealing of water interface.

[0027] The engine water outlet pipe 4 is made of EPDM rubber that can withstand high temperatures of 120℃. One end of it is sealed and connected to the water outlet flange of the engine 1 by a clamp, and the other end is fixedly connected to the water inlet of the three-way valve 5 by a clamp.

[0028] The radiator inlet pipe 6 is made of the same material as the engine outlet pipe 4. One end is connected to the first outlet of the three-way valve 5 through a clamp, and the other end is connected to the inlet of the radiator 7 through a clamp.

[0029] The radiator 7 is fixed to one side of the frame by angle iron and bolts, and the front panel of the radiator 7, i.e. the air-facing side of the heat dissipation fins, faces the outside of the frame 3 and is aligned with the vehicle's driving direction to ensure that natural wind can directly act on the heat dissipation fins during driving and maximize ventilation.

[0030] One end of the radiator outlet pipe 8 is connected to the outlet of the radiator 7 via a clamp, and the other end is connected to the inlet of the auxiliary water tank 10 via a clamp. The auxiliary water tank 10 is fixed inside the seat bucket by a plastic bracket and is located at the front of the engine 1. It can replenish the coolant in the circulation system in real time and balance the system pressure.

[0031] One end of the engine water inlet pipe 9 is connected to the outlet of the auxiliary water tank 10 via a clamp, and the other end is sealed to the inlet flange of the engine 1 via a clamp, forming a basic cooling circulation loop.

[0032] The heater 12 is fixed under the dashboard. One end of the heater inlet pipe 11 is connected to the second outlet of the three-way valve 5 through a clamp, and the other end is connected to the inlet of the heater 12 through a clamp. One end of the heater outlet pipe 13 is connected to the outlet of the heater 12 through a clamp, and the other end is connected to the end of the radiator inlet pipe 6 near the radiator 7 through a three-way connector, so as to avoid damaging the main passage of the radiator inlet pipe 6.

[0033] The inner diameters of engine water outlet pipe 4, radiator water inlet pipe 6, radiator water outlet pipe 8, and engine water inlet pipe 9 are all Ф23, which is suitable for the coolant displacement requirements of engine 1; the inner diameters of heater water inlet pipe 11 and heater water outlet pipe 13 are Ф12, which is suitable for the narrow installation space under the dashboard and can meet the heat exchange flow requirements of heater 12; since the engine heat production is lower in winter than in summer, the Ф12 pipe diameter can ensure the heat exchange efficiency of the heater and will not cause insufficient system flow.

[0034] This system can be manually switched via the three-way valve 5, or automatically switched via an electric valve. This embodiment uses manual switching as an example to achieve dual-condition adaptation for efficient heat dissipation in summer and heating and basic cooling in winter:

[0035] During the high temperatures of summer, operate the switching handle of the three-way valve 5 to close the second outlet connected to the heater inlet pipe 11, leaving only the first outlet connected to the radiator inlet pipe 6 open.

[0036] The coolant circulation path is as follows: Engine 1 outlet → Engine outlet pipe 4 → Three-way valve 5 → Radiator inlet pipe 6 → Radiator 7 → Radiator outlet pipe 8 → Auxiliary water tank 10 → Engine inlet pipe 9 → Engine 1 inlet.

[0037] In this path, the coolant does not need to flow through the heater 12, the heat dissipation path is shortened, and the inner diameter of all pipes is Ф23, resulting in a large circulation flow rate per unit time, which can quickly remove the heat generated by the engine 1 under high load and prevent the engine from overheating.

[0038] In winter when the temperature is low, operate the switching handle of the three-way valve 5 to open the second outlet that is connected to the water inlet pipe 11 of the heater, and close the first outlet.

[0039] The coolant circulation path is as follows: Engine 1 outlet → Engine outlet pipe 4 → Three-way valve 5 → Heater inlet pipe 11 → Heater 12 → Heater outlet pipe 13 → Radiator inlet pipe 6 → Radiator 7 → Radiator outlet pipe 8 → Auxiliary water tank 10 → Engine inlet pipe 9 → Engine 1 inlet.

[0040] In this process, the heater 12 can raise the cab temperature from 5°C to 18°C ​​within minutes to meet the heating requirements. At the same time, although the inner diameter of the heater inlet pipe 11 and the heater outlet pipe 13 is Ф12, the heat output of the engine 1 is reduced in winter, and it operates at low load for most of the time. In addition, the heat dissipation efficiency of the radiator 7 is increased due to the decrease in ambient temperature, and the coolant circulation flow rate can still be maintained at 5L / min, which is sufficient to ensure that the engine operating temperature is stable at around 85°C, without the risk of high temperature.

[0041] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cooling circulation system for a positive three-wheeled motorcycle, characterized by: Includes engine (1), engine mount (2), frame (3), engine outlet pipe (4), three-way valve (5), radiator inlet pipe (6), radiator (7), radiator outlet pipe (8), auxiliary water tank (10) and engine inlet pipe (9); The engine (1) is fixedly mounted on the engine mount (2), and the engine mount (2) is fixedly connected to the vehicle frame (3) by bolts; one end of the engine outlet pipe (4) is connected to the outlet of the engine (1), and the other end is connected to the inlet of the three-way valve (5); one end of the radiator inlet pipe (6) is connected to the first outlet of the three-way valve (5), and the other end is connected to the inlet of the radiator (7); the radiator (7) is fixedly mounted on the side of the vehicle frame (3) by bolts; one end of the radiator outlet pipe (8) is connected to the outlet of the radiator (7), and the other end is connected to the inlet of the auxiliary water tank (10); one end of the engine inlet pipe (9) is connected to the outlet of the auxiliary water tank (10), and the other end is connected to the inlet of the engine (1) to form a cooling circulation loop.

2. A cooling circulation system for a positive three-wheeled motorcycle according to claim 1, characterized in that: It also includes a heater (12), a heater inlet pipe (11) and a heater outlet pipe (13); One end of the heater inlet pipe (11) is connected to the second outlet of the three-way valve (5), and the other end is connected to the inlet of the heater (12); one end of the heater outlet pipe (13) is connected to the outlet of the heater (12), and the other end is connected to the inlet of the radiator (7).

3. A cooling circulation system for a three-wheeled motorcycle according to claim 2, characterized in that: The three-way valve (5) can selectively switch the water circuit: when it is in the high temperature season, the three-way valve (5) closes the second outlet connected to the heater inlet pipe (11), so that the coolant flows back to the engine (1) in sequence through the engine outlet pipe (4), the three-way valve (5), the radiator inlet pipe (6), the radiator (7), the radiator outlet pipe (8), the auxiliary water tank (10) and the engine inlet pipe (9); When it is a cold season, the three-way valve (5) opens the second outlet connected to the heater inlet pipe (11), so that the coolant flows back to the engine (1) in sequence through the engine outlet pipe (4), the three-way valve (5), the heater inlet pipe (11), the heater (12), the heater outlet pipe (13), the radiator (7), the radiator outlet pipe (8), the auxiliary water tank (10) and the engine inlet pipe (9).

4. A cooling circulation system for a three-wheeled motorcycle according to claim 2, characterized in that: The diameter of the engine water outlet pipe (4), radiator water inlet pipe (6), radiator water outlet pipe (8), and engine water inlet pipe (9) is Ф23, and the diameter of the heater water inlet pipe (11) and heater water outlet pipe (13) is Ф12.

5. A cooling circulation system for a positive three-wheeled motorcycle according to claim 1, characterized in that: The front panel of the radiator (7) is positioned facing outwards from the frame (3) to increase the ventilation at the radiator (7).

6. A cooling circulation system for a positive three-wheeled motorcycle according to claim 1, characterized in that: The auxiliary water tank (10) is fixedly installed inside the seat bucket and located at the front end of the engine (1).

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