Oil-cooled engine

Abstract

This invention relates to an oil-cooled engine, comprising an engine block and a cylinder head cover. The engine block has an oil cooling chamber, and the cylinder head cover, mounted on the engine block, has a temperature sensing actuator and a cooling component, and includes a fuel injector. The oil-cooled engine includes a cooling oil passage, which can be switched via the temperature sensing actuator to a first cooling passage or a second cooling passage. In the first cooling passage, oil flows from the oil cooling chamber through the temperature sensing actuator and is directly sprayed into the engine block through the fuel injector. In the second cooling passage, oil flows from the oil cooling chamber through the temperature sensing actuator, is first guided to the cooling component, and then sprayed into the engine block through the fuel injector. Thus, this invention integrates the oil cooling chamber and the cooling component into the oil-cooled engine, allowing the flow of oil through the oil cooling chamber to lower the metal temperature after combustion. Depending on the oil temperature, if the oil temperature reaches a target temperature, the oil can be guided to the cooling component for cooling, thereby improving heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to an oil-cooled engine, and more particularly to an oil-cooled engine suitable for gasoline-powered vehicles. Prior Technology

[0002] In conventional technology, oil-cooled engines typically have the engine and cooling components installed separately on the vehicle. The engine oil is cooled separately and then sent into the engine through the cooling oil circuit to lower the temperature of the metal after combustion. However, this structural design takes up too much space and cannot meet the requirements of miniaturization.

[0003] In addition, after the engine oil flows through the engine block and absorbs the heat energy from the engine combustion, the oil temperature will rise, and it will lose its cooling function for subsequent engine parts. Therefore, additional cooling components need to be installed in the oil circuit, otherwise there will be concerns about overheating.

[0004] Driven by this, and in the spirit of active invention, the inventor was eager to find an oil-cooled engine that could solve the above problems. After several research and experiments, he finally completed this invention. Summary of the Invention

[0005] The main objective of this invention is to provide an oil-cooled engine that integrates an oil cooling chamber and cooling components on the oil-cooled engine, so that the temperature of the metal after combustion of the engine can be reduced by the flow of engine oil through the oil cooling chamber, and the engine oil can be guided to the cooling components for cooling and cooling when the engine oil temperature reaches the target temperature, thereby improving heat dissipation efficiency.

[0006] To achieve the above objectives, the present invention provides an oil-cooled engine, including an engine body and a cylinder head cover. The engine body has an oil cooling chamber, through which engine oil flows to carry away the heat energy from combustion in the oil-cooled engine, thus lowering the metal temperature. The cylinder head cover is disposed on the engine body and has a temperature sensing actuator and a cooling component, and has an injection port. The oil-cooled engine includes a cooling oil passage, which can be switched to a first cooling passage or a second cooling passage via the temperature sensing actuator. In the first cooling passage, engine oil flows from the oil cooling chamber through the temperature sensing actuator and is directly sprayed into the engine body through the injection port; in the second cooling passage, engine oil flows from the oil cooling chamber through the temperature sensing actuator, is first guided to the cooling component, and then sprayed into the engine body through the injection port.

[0007] The aforementioned cooling oil circuit can be switched to the first cooling path or the second cooling path via a temperature sensing actuator according to the different oil temperatures. When the oil temperature has not yet reached a target temperature, it switches to the first cooling path, and when the oil temperature reaches the target temperature, it switches to the second cooling path.

[0008] The target temperature mentioned above can be 120°C.

[0009] The aforementioned oil-cooled engine may further include a crankcase, which has an oil pan and an oil pump.

[0010] When the engine oil in the first or second cooling passage is sprayed into the engine block from the fuel injector, it will slowly accumulate in the oil pan and then be pumped to the oil cooler by the oil pump.

[0011] The above-mentioned oil spray nozzle can spray engine oil with a single nozzle.

[0012] The aforementioned cooling component can be a heat dissipation fin.

[0013] The aforementioned engine body may include a cylinder head and a cylinder.

[0014] The above overview and the following detailed description are illustrative in nature and are intended to further illustrate the scope of the invention. Other objects and advantages of the invention will be explained in the subsequent description and illustrations. Simple Explanation of the Diagram

[0015] Figure 1 is a system architecture diagram of the first cooling passage of an oil-cooled engine according to a preferred embodiment of the present invention. Figure 2 is a schematic diagram of the oil flowing through the cylinder head cover in the first cooling passage of a preferred embodiment of the present invention. Figure 3 is a system architecture diagram of the second cooling passage of an oil-cooled engine according to a preferred embodiment of the present invention. Figure 4 is a schematic diagram of the oil flowing through the cylinder head cover in the second cooling passage of a preferred embodiment of the present invention. Implementation

[0016] Please refer to Figures 1 and 2, which are respectively a system architecture diagram of the first cooling passage of an oil-cooled engine according to a preferred embodiment of the present invention and a schematic diagram of the oil flowing through the cylinder head cover in the first cooling passage. The figures show an oil-cooled engine 1, including an engine body 2, a cylinder head cover 3, and a crankcase 4. The engine body 2 has an oil cooling chamber 21. When the oil S flows through the oil cooling chamber 21, it can carry away the heat energy from combustion in the oil-cooled engine 1, causing the metal temperature to drop. The engine body 2 includes a cylinder head (not shown) and a cylinder (not shown). The cylinder head cover 3 is disposed on the cylinder head of the engine body 2 and has a temperature sensing actuator 31 and a cooling component 32, and has an oil injection port 33. The number of oil injection ports 33 is not limited to one and can also be other values. The temperature sensing actuator 31 can be used to switch the route of the cooling oil circuit. In this embodiment, the cooling component 32 is a heat dissipation fin and is an integral structure with the cylinder head cover 3, but it is not limited to this and the cooling component 32 and the cylinder head cover 3 can also be a combined structure. The oil injection port 33 sprays engine oil S through a nozzle 331. The crankcase 4 has an oil pan 41 and an oil pump 42.

[0017] The oil-cooled engine 1 includes a cooling oil circuit, which can be switched to a first cooling path or a second cooling path via a temperature sensing driver 31 according to the different temperatures of the engine oil S.

[0018] As shown in Figures 1 and 2, when the oil temperature S has not yet reached a target temperature, the system switches to the first cooling path. The oil S in the first cooling path flows from the oil cooler 21 through the temperature sensing actuator 31 and is directly sprayed from the fuel injector 33 into the engine block 2. This simultaneously lubricates the components inside the cylinder head and slowly accumulates in the oil pan 41. The oil is then pumped back to the oil cooler 21 by the oil pump 42, completing the oil circulation of the cooling oil path. In this embodiment, the target temperature is 120°C, but this value is not a limitation. Depending on the specifications of the temperature sensing actuator 31, it can be set to any value between 60°C and 120°C, but the target temperature must not exceed 120°C.

[0019] As shown in Figures 3 and 4, when the oil S temperature reaches the target temperature, it switches to the second cooling path. The oil S in the second cooling path flows from the oil cooling chamber 21 through the temperature sensing actuator 31, and is first guided to the cooling component 32 for cooling. Then it is sprayed into the engine body 2 through the oil injector 33, which can simultaneously lubricate the parts in the cylinder head and slowly accumulate in the oil pan 41. Then it is pumped to the oil cooling chamber 21 by the oil pump 42 to complete the oil circulation of the cooling oil path.

[0020] With the above design, the present invention integrates the oil cooling chamber 21 and the cooling component 32 into the oil-cooled engine 1, so that the metal temperature after combustion of the oil-cooled engine 1 can be reduced by the flow of engine oil S through the oil cooling chamber 21. Depending on the temperature of the engine oil S, if the temperature of the engine oil S reaches the target temperature, the engine oil S can be guided to the cooling component 32 for cooling and temperature reduction, thereby improving heat dissipation efficiency.

[0021] The above embodiments are merely examples for the purpose of illustration. The scope of the claims made in this invention should be determined by the claims of the patent application, and not limited to the above embodiments.

[0022] 1: Oil-cooled engine 2: Engine body 21: Oil cooling chamber 3: Cylinder head cover 31: Temperature sensing actuator 32: Cooling components 33: Fuel Injector 331: Nozzle 4: Crankcase 41: Oil pan 42: Oil pump S: Engine oil

Claims

1. An oil-cooled engine, comprising: an engine body having an oil cooling chamber; and a cylinder head cover disposed on the engine body, having a temperature sensing actuator and a cooling component, and having an oil injection port; wherein, The oil-cooled engine includes a cooling oil passage, which can be switched to a first cooling passage or a second cooling passage via the temperature sensing actuator. In the first cooling passage, the oil flows from the oil cooler chamber through the temperature sensing actuator and is then sprayed directly into the engine body through the fuel injector. In the second cooling passage, the oil flows from the oil cooler chamber through the temperature sensing actuator, is first guided to the cooling component, and then sprayed into the engine body through the fuel injector.

2. The oil-cooled engine as described in claim 1, wherein, The cooling oil circuit can be switched to the first cooling path or the second cooling path via the temperature sensing driver according to the different oil temperatures. When the oil temperature has not yet reached a target temperature, it switches to the first cooling path, and when the oil temperature reaches the target temperature, it switches to the second cooling path.

3. The oil-cooled engine as described in claim 2, wherein, The target temperature is 120°C.

4. The oil-cooled engine as described in claim 1, further comprising a crankcase having an oil pan and an oil pump.

5. The oil-cooled engine as described in claim 4, wherein, When the engine oil in the first or second cooling passage is sprayed into the engine body through the fuel injector, it will slowly accumulate in the oil pan and then be pumped to the oil cooler by the oil pump.

6. The oil-cooled engine as described in claim 1, wherein, The oil injector is a nozzle that sprays engine oil.

7. The oil-cooled engine as described in claim 1, wherein, The cooling component is a heat dissipation fin.

8. The oil-cooled engine as described in claim 1, wherein, The engine body consists of a cylinder head and a cylinder.

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