External circulation cooling method for engine oil of general gasoline engine
By improving the crankcase structure and installing an oil pump, the external circulation cooling of the oil of the small gasoline engine is solved, and the problem of poor cooling effect in a small space is improved, durability and cooling effect are improved, and stable operation in a low-temperature environment is ensured.
Patent Information
- Application Number
- CN202411660549.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2024-12-20
AI Technical Summary
The existing small general-purpose gasoline engine has limited cooling effect in small and closed spaces, lacks an oil pump and external cooling interface, and cannot achieve external circulation cooling of the oil, resulting in poor cooling effect and insufficient lubrication.
By improving the crankcase structure, connecting the oil outlet pipe with oil drain holes, installing an oil pump and an electronic control speed control device, the external circulation and cooling of the oil are realized, and heat exchange is performed with the oil cooler and external low-temperature airflow to form a spray oil droplet to the moving parts Lubricate and cool.
It improves the durability and heat resistance of the gasoline engine, enhances the cooling effect, improves the lubrication conditions, improves the overall safety and performance stability of the use, especially in low-temperature environments, effectively avoids the risk of excessive pipeline pressure.
Smart Images
Figure CN119163490A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of gasoline engine cooling, and in particular to a method for external circulation cooling of engine oil of a general gasoline engine. Background Art
[0002] Existing small general-purpose gasoline engines usually adopt air cooling and generally need to be used in open areas. However, for some small and closed spaces, the cooling effect of simple air cooling is subject to certain limitations, and the gasoline engine needs to be further cooled. Existing small general-purpose gasoline engines are limited by spatial structure and cost. The internal lubrication of the engine body is only splash type, and there is no pressure lubrication. There is a lack of an oil pump to drive the engine oil, and there is no oil pump installation interface and power source. Therefore, it is impossible to output the engine oil to the outside for cooling. Summary of the invention
[0003] The purpose of the present invention is to provide a method for external circulation cooling of engine oil of a general gasoline engine. The method improves the crankcase of an existing general gasoline engine. The improved crankcase engine oil outlet hole directly utilizes the oil drain hole structure of the crankcase, cancels the oil drain screw plug, and is connected to the gasoline engine oil outlet pipe instead. The engine oil pumped out of the crankcase enters the external oil circuit system from here under the action of the oil pump. The gasoline engine adopts an electronically controlled speed regulating device, cancels the original speed regulating swing rod of the general gasoline engine on the market, and adjusts the crankcase swing rod hole to be the crankcase engine oil inlet hole. When in use, the camshaft gear rotates at high speed to stir the crankshaft The engine oil in the crankcase oil pool forms splashing oil droplets, which can lubricate and cool the moving parts in the crankcase, ensuring that the overall durability of the gasoline engine is stronger and has better heat resistance. The high-temperature oil is forced to be output from the engine body under the drive of the oil pump. After heat exchange and cooling with the external low-temperature airflow through the oil cooler, the low-temperature oil returns to the crankcase from the crankcase oil inlet hole to form spray oil droplets, which are sprayed onto the moving parts of the gasoline engine. The cooling effect is better, the lubrication conditions are greatly improved, the durability during use is stronger, the overall safety is higher, and the performance is more stable.
[0004] The technical solution of the present invention is as follows: An oil-cooled general-purpose gasoline engine, characterized in that it includes a gasoline engine main body, a temperature control switch is provided on the gasoline engine main body, a gasoline engine oil outlet pipe is provided below the gasoline engine main body, an oil filter is connected to the outer side of the gasoline engine oil outlet pipe, the oil filter is connected to the oil pump through an oil pump oil inlet pipe, the oil pump is connected to an oil cooler through an oil cooling oil inlet pipe, a gasoline engine oil inlet hole is provided at the upper end of the gasoline engine main body, the oil cooler is connected to the gasoline engine oil inlet hole through an oil cooler oil outlet pipe, a double-layer return cooling delivery pipe is provided on the oil cooler, the gasoline engine oil outlet pipe and the oil cooler oil outlet pipe are respectively connected to the crankcase oil outlet hole and the crankcase oil inlet hole on the crankcase inside the gasoline engine main body, and the gasoline engine oil inlet hole is connected to the crankcase oil inlet hole.
[0005] Furthermore, the gasoline engine oil outlet pipe is detachably connected to the gasoline engine oil outlet hole on the gasoline engine body.
[0006] Furthermore, the gasoline engine oil inlet hole is connected to the oil outlet pipe of the oil cooler through an oil pipe sealing gasket and a hollow bolt.
[0007] A method for external circulation cooling of engine oil in a general gasoline engine, characterized in that: the temperature control switch is fixed on the top of the crankcase, and the conduction temperature value is set to 90°C. When the gasoline engine body starts running, if the temperature of the top of the crankcase does not reach the conduction value, the oil pump will not work, and the lubrication depends entirely on the engine oil inside the crankcase; as the gasoline engine body runs with load, the crankcase temperature gradually increases until it reaches the conduction temperature of the temperature control switch, and the oil pump starts working to achieve external circulation cooling of the engine oil, the oil inlet pipe of the oil cooler is arranged below the oil cooler, and the oil outlet pipe of the oil cooler is arranged above the oil cooler, and their positions are higher than the crankcase oil pool. After the gasoline engine body stops running, the oil pump stops working, and the engine oil slowly flows back into the crankcase under the action of gravity.
[0008] Beneficial effects of the present invention: 1. The present invention improves the crankcase of the existing general gasoline engine. The improved crankcase oil outlet hole directly utilizes the oil drain hole structure of the crankcase, cancels the oil drain plug, and is connected to the gasoline engine oil outlet pipe instead. The oil pumped out of the crankcase enters the external oil system from here under the action of the oil pump. The gasoline engine adopts an electronically controlled speed regulating device, cancels the original speed regulating swing rod of the general gasoline engine on the market, and adjusts the crankcase swing rod hole to be a crankcase oil inlet hole. When in use, the camshaft gear rotates at a high speed to stir the oil in the crankcase oil pool to form splashing oil droplets, which can play a role in lubricating and cooling the moving parts in the crankcase.
[0009] 2. It ensures that the overall durability of the gasoline engine is stronger and has better heat resistance. The high-temperature oil is forced to be output from the engine body under the drive of the oil pump. After heat exchange and cooling with the external low-temperature airflow through the oil cooler, the low-temperature oil returns to the crankcase from the crankcase oil inlet hole to form spray oil droplets, which are sprayed onto the moving parts of the gasoline engine. The cooling effect is better, the lubrication conditions are greatly improved, the durability during use is stronger, the overall safety is higher, and the performance is more stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the gasoline engine main body of the present invention; In the figure: 1. gasoline engine body, 2. temperature control switch, 3. gasoline engine oil outlet pipe, 4. oil filter, 5. oil pump oil inlet pipe, 6. oil pump, 7. oil cooling oil inlet pipe, 8. oil cooler, 9. oil cooler oil outlet pipe, 11. gasoline engine oil outlet hole, 12. gasoline engine oil inlet hole. DETAILED DESCRIPTION
[0011] like Figure 1 and Figure 2 As shown, it includes a gasoline engine body 1, on which a temperature control switch 2 is provided, and a gasoline engine oil outlet pipe 3 is provided below the gasoline engine body 1, and an oil filter 4 is connected to the outer side of the gasoline engine oil outlet pipe 3, and the oil filter 4 is connected to the oil pump 6 through an oil pump inlet pipe 5, and the oil pump 6 is connected to an oil cooler 8 through an oil cooling inlet pipe 7, and a gasoline engine oil inlet hole 12 is provided at the upper end of the gasoline engine body 1, and the oil cooler 8 is connected to the gasoline engine oil inlet hole 12 through an oil cooler oil outlet pipe 9, and a double-layer return cooling delivery pipe is provided on the oil cooler 8, and the gasoline engine oil outlet pipe 3 and the oil cooler oil outlet pipe 9 are respectively connected to the crankcase oil outlet hole and the crankcase oil inlet hole on the crankcase inside the gasoline engine body 1, and the gasoline engine oil inlet hole 12 is connected to the crankcase oil inlet hole.
[0012] A method for external circulation cooling of engine oil of a general gasoline engine, characterized in that: the temperature control switch 2 is fixed on the top of the crankcase, and the conduction temperature value is set to 90°C. When the gasoline engine body 1 starts running, if the temperature of the top of the crankcase does not reach the conduction value, the oil pump 6 does not work, and the lubrication depends entirely on the engine oil inside the crankcase; as the gasoline engine body 1 runs with load, the crankcase temperature gradually increases until it reaches the conduction temperature of the temperature control switch 2, and the oil pump 6 starts working to achieve external circulation cooling of the engine oil, the oil cooler oil inlet pipe 7 is arranged below the oil cooler 8, and the oil cooler oil outlet pipe 9 is arranged above the oil cooler 8, and their positions are higher than the crankcase oil pool. After the gasoline engine body 1 stops running, the oil pump 6 stops working, and the engine oil slowly flows back to the crankcase under the action of gravity. The invention improves the crankcase of the existing general gasoline engine. The improved crankcase oil outlet hole directly utilizes the oil drain hole structure of the crankcase, cancels the oil drain plug, and connects to the gasoline engine oil outlet pipe. The oil pumped out of the crankcase enters the external oil system from here under the action of the oil pump. The gasoline engine adopts an electronically controlled speed regulating device, cancels the original speed regulating swing rod of the general gasoline engine on the market, and adjusts the crankcase swing rod hole to be the crankcase oil inlet hole. When in use, the camshaft gear rotates at high speed to stir the oil in the crankcase oil pool to form splash oil. The drops can lubricate and cool the moving parts in the crankcase, ensuring that the overall durability of the gasoline engine is stronger and has better heat resistance. The high-temperature oil is forced to be output from the engine body under the drive of the oil pump. After heat exchange and cooling with the external low-temperature airflow through the oil cooler, the low-temperature oil returns to the crankcase from the crankcase oil inlet hole to form spray oil droplets, which are sprayed onto the moving parts of the gasoline engine. The cooling effect is better, the lubrication conditions are greatly improved, the durability during use is stronger, the overall safety is higher, and the performance is more stable.
[0013] In the low temperature environment in winter, the engine oil has high viscosity and poor fluidity. If the oil is pumped directly, it is easy to cause excessive pressure in the pipeline and the oil cooler 8, which is easy to cause rupture and damage. The gasoline engine body 1 works in this low temperature environment. At the beginning, the pipeline and the oil cooler 8 are in an oil-free state. As the temperature of the crankcase 11 gradually increases until it reaches the conduction temperature of the temperature control switch 2, the oil pump 6 starts to work and pumps the high-temperature and low-viscosity engine oil in the oil pool of the crankcase 11 into the oil cooler 8. At this time, the risk of high pressure inside the pipeline is avoided, and external circulation cooling of the engine oil in the low temperature environment in winter is achieved.
[0014] Preferably, the isolation safety matching plate 4 is located at the center position of the main body matching mounting column 1 in the left and right directions, so that the overall structural support strength is better and the service life is longer during use.
[0015] Preferably, the gasoline engine oil outlet pipe 3 is connected to the gasoline engine oil outlet hole 11 on the gasoline engine body 1 in a detachable manner, which makes the combined operation more convenient during connection and maintenance more convenient.
[0016] Preferably, the gasoline engine oil inlet hole 12 is connected to the oil cooler oil outlet pipe 9 through an oil pipe sealing gasket and a hollow bolt, which can ensure better fluidity of the connection position during oil transportation and can meet the requirements of fast and smooth transportation when the pressure is relatively high or the temperature is relatively high.
[0017] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements or substitutions can be made without departing from the principles of the present invention. These improvements or substitutions should also be regarded as the scope of protection of the present invention.
Claims
1. An oil-cooled general-purpose gasoline engine, characterized in that: The invention comprises a gasoline engine body (1), wherein the gasoline engine body (1) is provided with a temperature control switch (2), a gasoline engine oil outlet pipe (3) is provided below the gasoline engine body (1), an oil filter (4) is connected to the outside of the gasoline engine oil outlet pipe (3), the oil filter (4) is connected to an oil pump (6) via an oil pump oil inlet pipe (5), the oil pump (6) is connected to an oil cooler (8) via an oil cooling oil inlet pipe (7), and a gasoline engine oil filter (4) is provided at the upper end of the gasoline engine body (1). The oil cooler (8) is connected to the gasoline engine oil inlet hole (12) through an oil cooler oil outlet pipe (9), the oil cooler (8) is provided with a double-layer return cooling delivery pipe, the gasoline engine oil outlet pipe (3) and the oil cooler oil outlet pipe (9) are respectively connected to the crankcase oil outlet hole and the crankcase oil inlet hole on the crankcase inside the gasoline engine body (1), and the gasoline engine oil inlet hole (12) is connected to the crankcase oil inlet hole.
2. The oil-cooled general-purpose gasoline engine according to claim 1, characterized in that: The gasoline engine oil outlet pipe (3) is detachably connected to the gasoline engine oil outlet hole (11) on the gasoline engine body (1).
3. The oil-cooled general-purpose gasoline engine according to claim 1, characterized in that: The gasoline engine oil inlet hole (12) is connected to the oil cooler oil outlet pipe (9) via an oil pipe sealing gasket and a hollow bolt.
4. A method for external circulation cooling of general gasoline engine oil according to claim 1, characterized in that: The temperature control switch (2) is fixed on the top of the crankcase, and the conduction temperature value is set to 90°C. When the gasoline engine body (1) starts running, if the temperature of the top of the crankcase does not reach the conduction value, the oil pump (6) will not work, and the lubrication will be completely dependent on the oil inside the crankcase. As the gasoline engine body (1) runs with load, the temperature of the crankcase gradually increases until it reaches the conduction temperature of the temperature control switch (2), and the oil pump (6) starts to work to achieve external circulation cooling of the oil. The oil cooler oil inlet pipe (7) is arranged below the oil cooler (8), and the oil cooler oil outlet pipe (9) is arranged above the oil cooler (8), and their positions are higher than the crankcase oil pool. After the gasoline engine body (1) stops running, the oil pump (6) stops working, and the oil slowly flows back into the crankcase under the action of gravity.