Engine cooling system and vehicle

Abstract

According to the engine cooling system and the vehicle, the engine cooling liquid channel, the cooler assembly, the integrated channel and the main electronic water pump form the cooling liquid circulation pipeline, cooling of an engine is achieved, in addition, due to the fact that cooling liquid circulation can be achieved through the integrated channel directly arranged on the engine, the cooling efficiency is improved, and the service life is prolonged. Compared with the prior art that cooling liquid circulation needs to be achieved through pipelines arranged in the space outside the engine, the number of pipeline components in the engine cooling system can be reduced, the complexity of arrangement of the pipeline components can be reduced, and space is provided for arrangement of other parts.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an engine cooling system and a vehicle. Background Technology

[0002] Car engines generate a lot of heat during operation, so they need to be cooled to ensure they are kept within a suitable operating temperature range. This is crucial for improving fuel efficiency, reducing emissions, and extending engine life. Therefore, how to cool engines has become a pressing technical problem that needs to be solved. Utility Model Content

[0003] The purpose of this application is to provide an engine cooling system and a vehicle to solve the above-mentioned technical problems.

[0004] On the one hand, an engine cooling system is provided, comprising:

[0005] The system includes a main electric water pump, an engine coolant passage for cooling the engine, an integrated passage on the engine, and a cooler assembly. The cooler assembly includes an oil cooler and an EGR cooler connected in series. The outlet of the engine coolant passage is connected to the inlet of the cooler assembly. The outlet of the cooler assembly is connected to the integrated passage and then to the inlet of the main electric water pump. The outlet of the main electric water pump is connected to the inlet of the engine coolant passage.

[0006] In one embodiment, the engine coolant passage includes a cylinder block coolant passage and a cylinder head coolant passage that are connected to each other. The integrated passage is disposed on the cylinder block of the engine. The outlet of the cylinder block coolant passage is connected to the inlet of the cooler assembly. The outlet of the main electric water pump is connected to the inlet of the cylinder block coolant passage, and the outlet of the cylinder head coolant passage is connected to the integrated passage.

[0007] In one embodiment, the engine cooling system further includes a turbocharger cooling pipe for cooling the turbocharger, wherein the outlet of the cylinder block coolant passage is connected to the inlet of the turbocharger cooling pipe, and the outlet of the turbocharger cooling pipe is connected to the integrated channel.

[0008] In one embodiment, the engine cooling system further includes a thermostat, the inlet of which is connected to the outlet of the cylinder head coolant passage, and the outlet of which is connected to a waste heat recovery pipeline and a radiator.

[0009] In one embodiment, the engine cooling system further includes a radiator, the inlet of which is connected to the outlet of the thermostat, and the outlet of which is connected to the main electric water pump.

[0010] In one embodiment, the waste heat recovery pipeline includes: a first three-way pipe, a secondary electric water pump, a heater, a warm air core, and a three-way valve;

[0011] The outlet of the first three-way pipe is connected to the inlet of the three-way valve through the auxiliary electronic water pump, the heater, and the warm air core; the first inlet of the first three-way pipe is connected to the outlet of the thermostat; the second inlet of the first three-way pipe is connected to the first outlet of the three-way valve; and the second outlet of the three-way valve is connected to the main electronic water pump.

[0012] In one embodiment, the engine cooling system further includes an expansion tank, the outlet of the heater core is connected to the inlet of the expansion tank, and the outlet of the expansion tank is connected to the main electric water pump.

[0013] In one embodiment, the waste heat recovery pipeline further includes a second three-way pipe, the outlet of the heater core is connected to the inlet of the second three-way pipe, the first outlet of the second three-way pipe is connected to the inlet of the three-way valve, and the second outlet of the second three-way pipe is connected to the inlet of the expansion tank.

[0014] In one embodiment, the outlet of the cylinder head coolant passage is connected to the inlet of the expansion tank, and the outlet of the radiator is connected to the inlet of the expansion tank.

[0015] On the other hand, a vehicle is also provided, including any of the engine cooling systems described above.

[0016] The engine cooling system and vehicle provided in this application achieve engine cooling by forming a coolant circulation pipeline through an engine coolant passage, a cooler assembly, an integrated channel, and a main electric water pump. In addition, since coolant circulation can be achieved through an integrated channel directly installed on the engine, compared with related technologies that require coolant circulation through pipelines installed in a space outside the engine, the number of pipeline components in the engine cooling system can be reduced, the complexity of pipeline component layout can be reduced, and space can be provided for the layout of other components.

[0017] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The purposes and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to limit this disclosure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the engine cooling system provided in an embodiment of this application;

[0020] Explanation of reference numerals in the attached diagram: 1. Main electric water pump; 2. Integrated channel; 3. Oil cooler; 4. EGR cooler; 5. Cylinder head water jacket; 6. Cylinder block water jacket; 7. Thermostat; 8. Radiator; 9. Expansion tank; 10. First tee pipe; 11. Auxiliary electric water pump; 12. Heater; 13. Heater core; 14. Three-way valve; 15. Second tee pipe; 16. Temperature sensor; 17. Third tee pipe; 18. Fourth four-way pipe; 19. Four-way pipe; 20. Turbocharger cooling line. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] This application provides an engine cooling system; please refer to [link / reference]. Figure 1 As shown, it includes: a main electric water pump 1, an engine coolant passage for cooling the engine, an integrated passage 2 installed on the engine, and a cooler assembly. The cooler assembly includes an oil cooler 3 and an EGR (Exhaust Gas Recirculation) cooler 4 connected in series. The outlet of the engine coolant passage is connected to the inlet of the cooler assembly. The outlet of the cooler assembly is connected to the integrated passage 2 and then to the inlet of the main electric water pump 1. That is, the outlet of the cooler assembly is connected to the inlet of the integrated passage 2, the outlet of the integrated passage 2 is connected to the inlet of the main electric water pump 1, and the outlet of the main electric water pump 1 is connected to the inlet of the engine coolant passage.

[0023] In one embodiment, the outlet of the engine coolant passage is connected to the oil cooler 3, the outlet of the oil cooler 3 is connected to the inlet of the EGR cooler 4, and the outlet of the EGR cooler 4 is connected to the integrated passage 2.

[0024] In another embodiment, the outlet of the engine coolant passage is connected to the EGR cooler 4, the outlet of the EGR cooler 4 is connected to the inlet of the oil cooler 3, and the outlet of the oil cooler 3 is connected to the integrated passage 2.

[0025] It should be noted that the oil cooler 3 in this embodiment is used to cool the engine oil, and the EGR cooler 4 is used to reduce the temperature inside the engine combustion chamber.

[0026] Engine coolant passages are pipes installed on the engine for circulating coolant and facilitating heat exchange, thereby cooling the engine. Integrated passage 2 is a pipe installed on the engine for circulating coolant and transporting it. Typically, engine coolant passages and integrated passage 2 are located in different parts of the engine.

[0027] In one embodiment, the engine coolant passage includes a cylinder block coolant passage and a cylinder head coolant passage that are connected to each other. An integrated passage 2 is disposed on the engine block. The outlet of the cylinder block coolant passage is connected to the inlet of the cooler assembly. The outlet of the main electric water pump 1 is connected to the inlet of the cylinder block coolant passage. The outlet of the cylinder head coolant passage is connected to the integrated passage 2.

[0028] For example, the cylinder block coolant channel is the cylinder block water jacket 5, the cylinder head coolant channel is the cylinder head water jacket 6, the integrated channel 2 is the cylinder block integrated water channel, and the coolant is composed of water and various additives used to achieve the cooling effect.

[0029] It is understood that, in this embodiment of the application, the outlet of the integrated channel 2 can be connected to the main electric water pump 1 through a transition joint.

[0030] In one embodiment, the engine cooling system further includes a turbocharger cooling pipe 20 for cooling the turbocharger, the outlet of the cylinder block coolant passage is connected to the inlet of the turbocharger cooling pipe 6, and the outlet of the turbocharger cooling pipe 20 is connected to the inlet of the integrated channel 2.

[0031] In one embodiment, the engine cooling system further includes a thermostat 7, the inlet of which is connected to the outlet of the cylinder head coolant passage, and the outlet of the thermostat 7 is connected to the waste heat recovery pipeline and the radiator 8 respectively.

[0032] The thermostat 7 includes a thermostat 7 chamber and a thermostat 7 temperature sensor. The thermostat 7 chamber includes an inlet and an outlet. The thermostat 7 monitors and controls the coolant temperature through the thermostat 7 temperature sensor to ensure that the engine cooling system operates as needed. The radiator 8 is used to dissipate heat from the engine. Specifically, the thermostat 7 can control the flow rate of coolant entering the radiator 8 to ensure that the engine operates at a suitable temperature. The flow path of the coolant is controlled by the thermal expansion and contraction of the temperature sensing component. At low temperatures, the coolant undergoes a small circulation and does not need to flow through the radiator 8 for heat dissipation; at high temperatures, the coolant undergoes a large circulation and flows through the radiator 8 for heat dissipation.

[0033] In one embodiment, the engine cooling system further includes a radiator 8, the inlet of which is connected to the outlet of the thermostat 7, and the outlet of the radiator 8 is connected to the main electric water pump 1.

[0034] The waste heat recovery pipeline in this embodiment is used to recover heat from the coolant to heat the cabin space. For example, the waste heat recovery pipeline includes: a first three-way pipe 10, an auxiliary electric water pump 11, a heater 12, a heater core 13, and a three-way valve 14; wherein, the outlet of the first three-way pipe 10 is connected to the inlet of the three-way valve 14 through the auxiliary electric water pump 11, the heater 12, and the heater core 13; the first inlet of the first three-way pipe 10 is connected to the outlet of the thermostat 7; the second inlet of the first three-way pipe 10 is connected to the first outlet of the three-way valve 14; and the second outlet of the three-way valve 14 is connected to the main electric water pump 1.

[0035] In one embodiment, when waste heat recovery is required through the waste heat recovery pipeline, such as when the ambient temperature is determined to be less than a preset first temperature threshold, or when the cabin heating function is determined to be turned on, the coolant flow rate supplied to the waste heat recovery pipeline and the coolant flow rate supplied to the branch pipeline where the heater core 13 is located can be distributed through the three-way valve 14 according to the engine outlet water temperature.

[0036] In one embodiment, when waste heat recovery is not required through the waste heat recovery pipeline, such as when the ambient temperature is determined to be greater than a preset second temperature threshold, or when the cabin cooling function is determined to be activated, the coolant circuit on the high-temperature side of the engine can be closed by the three-way valve 14. For example, the inlet of the three-way valve 14 can be closed to prevent the flow of high-temperature coolant from affecting the cooling of the cabin and battery. This condition can also ensure that the coolant flow of the waste heat recovery pipeline enters the radiator 8, increasing the coolant flow through the radiator 8, thereby improving the heat dissipation capacity of the radiator 8 and preventing the engine coolant temperature from exceeding the standard.

[0037] In one embodiment, a temperature sensor 16 can be installed between the outlet of the thermostat 7 and the inlet of the waste heat recovery pipeline to detect the temperature of the coolant flowing out of the thermostat 7, and to control the three-way valve 14 based on this temperature. For example, the engine cooling system includes a controller for controlling the three-way valve 14. For instance, the three-way valve 14 can be controlled based on the temperature detected by the temperature sensor 16, which can be considered the engine's outlet water temperature. When this temperature exceeds a preset third temperature threshold, it indicates that the engine temperature is high. In this case, the inlet of the three-way valve 14 can be closed to ensure that the coolant flow from the waste heat recovery pipeline enters the radiator 8, increasing the coolant flow through the radiator 8, thereby improving the radiator 8's heat dissipation capacity and better reducing the engine temperature.

[0038] In one embodiment, the engine cooling system also includes an expansion tank 9, with the outlet of the heater core 13 connected to the inlet of the expansion tank 9, and the outlet of the expansion tank 9 connected to the main electric water pump 1. When the engine is running, the coolant temperature rises, causing it to expand in volume. The expansion tank 9 provides an additional space to accommodate this increased coolant, preventing excessive pressure inside the cooling system. Conversely, after the engine cools down, the coolant contracts, and the expansion tank 9 can replenish the stored coolant into the system, preventing air from entering the engine cooling system and forming bubbles.

[0039] In one embodiment, the waste heat recovery pipeline further includes a second three-way pipe 15, the outlet of the warm air core 13 is connected to the inlet of the second three-way pipe 15, the first outlet of the second three-way pipe 15 is connected to the inlet of the three-way valve 14, and the second outlet of the second three-way pipe 15 is connected to the inlet of the expansion tank 9.

[0040] In one embodiment, the outlet of the cylinder head coolant passage is connected to the inlet of the expansion tank 9, and the outlet of the radiator 8 is connected to the inlet of the expansion tank 9.

[0041] In one embodiment, a third three-way pipe 17 is also provided between the temperature sensor 16 and the first three-way pipe 10. The input end of the third three-way pipe 17 is connected to the temperature sensor 16, the first outlet of the third three-way pipe 17 is connected to the first inlet of the first three-way pipe 10, and the second outlet of the third three-way pipe 17 is connected to the inlet of the integrated channel 2. The pipeline between the second outlet of the third three-way pipe 17 and the inlet of the integrated channel 2 is also called a small circulation pipeline.

[0042] In one embodiment, the transition connector is a fourth three-way pipe 18, the outlet of the integrated channel 2 is connected to the first inlet of the fourth three-way pipe 18, the outlet of the expansion tank 9 is connected to the second inlet of the fourth three-way pipe 18, and the outlet of the fourth three-way pipe 18 is connected to the inlet of the main electric water pump 1.

[0043] In one embodiment, the engine cooling system further includes a four-way pipe 19, the outlet of the radiator 8 is connected to the first inlet of the four-way pipe 19, the second outlet of the three-way valve 14 is connected to the second inlet of the four-way pipe 19, the outlet of the expansion tank 9 is connected to the third inlet of the four-way pipe 19, and the outlet of the four-way pipe 19 is connected to the second inlet of the fourth three-way pipe 18.

[0044] In this embodiment of the application, the coolant circulation route under small-circulation conditions includes the following route:

[0045] Main electronic water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Thermostat 7 chamber → Thermostat 7 temperature sensor → Temperature sensor 16 → Heater core 13 → Main electronic water pump 1.

[0046] Main electronic water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Thermostat 7 chamber → Thermostat 7 temperature sensor → Temperature sensor 16 → Heater core 13 → Degassing pipe → Throttling orifice → Expansion tank 9 → Main electronic water pump 1.

[0047] Main electronic water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Thermostat 7 chamber → Thermostat 7 temperature sensor → Temperature sensor 16 → Throttling orifice → Small circulation pipeline → Integrated channel 2 → Transition joint → Main electronic water pump 1.

[0048] Main electric water pump 1 → Cylinder block water jacket 6 → Oil cooler 3 → EGR cooler 4 → Main electric water pump 1.

[0049] Main electric water pump 1 → Cylinder block water jacket 6 → Turbocharger cooling pipe → Main electric water pump 1.

[0050] Main electric water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Cylinder head degassing pipe → Check valve → Throttle orifice → Expansion tank 9 → Main electric water pump 1.

[0051] In this embodiment of the application, the coolant circulation route under large-circulation operating conditions includes the following route:

[0052] Main electronic water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Thermostat 7 chamber → Thermostat 7 temperature sensor → Temperature sensor 16 → Heater core 13 → Main electronic water pump 1.

[0053] Main electronic water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Thermostat 7 chamber → Thermostat 7 temperature sensor → Temperature sensor 16 → Heater core 13 → Degassing pipe → Throttling orifice → Expansion tank 9 → Main electronic water pump 1.

[0054] Main electronic water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Thermostat 7 chamber → Thermostat 7 temperature sensor → Temperature sensor 16 → Throttling orifice → Small circulation pipeline → Integrated channel 2 → Transition joint → Main electronic water pump 1.

[0055] Main electric water pump 1 → Cylinder block water jacket 6 → Oil cooler 3 → EGR cooler 4 → Main electric water pump 1.

[0056] Main electric water pump 1 → Cylinder block water jacket 6 → Turbocharger cooling pipe 20 → Main electric water pump 1.

[0057] Main electric water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Cylinder head degassing pipe → Check valve → Throttle orifice → Expansion tank 9 → Main electric water pump 1.

[0058] Main electric water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Thermostat 7 chamber → Temperature sensor 16 → Radiator 8 → Main electric water pump 1.

[0059] Main electric water pump 1 → Cylinder block water jacket 6 → Cylinder head water jacket 5 → Thermostat 7 chamber → Thermostat 7 temperature sensor → Radiator 8 → Degassing pipe → Throttling orifice → Expansion tank 9 → Main electric water pump 1.

[0060] Furthermore, embodiments of this application also provide a vehicle including any of the above-described engine cooling systems.

[0061] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this application. Therefore, the drawings only show components relevant to this application and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex. The structures, proportions, sizes, etc., shown in the accompanying drawings are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0062] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the document does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0063] The definitions used herein, such as the terms “having,” “may have,” “comprising,” or “may include,” indicate the presence of the corresponding function, operation, element, etc., and do not limit the presence of one or more other functions, operations, elements, etc. Furthermore, it should be understood that the terms “comprising” or “having” as used herein indicate the presence of the features, figures, steps, operations, elements, components, or combinations thereof described in the specification, without excluding the presence or addition of one or more other features, figures, steps, operations, elements, components, or combinations thereof.

[0064] The prefixes such as "first" and "second" used in this application embodiment are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this application embodiment does not constitute a limitation on the described objects. For statements regarding the described objects, please refer to the claims or the context of the embodiments. The use of such prefixes should not constitute unnecessary limitations. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An engine cooling system, characterized in that, include: The system includes a main electric water pump, an engine coolant passage for cooling the engine, an integrated passage on the engine, and a cooler assembly. The cooler assembly includes an oil cooler and an EGR cooler connected in series. The outlet of the engine coolant passage is connected to the inlet of the cooler assembly. The outlet of the cooler assembly is connected to the integrated passage and then to the inlet of the main electric water pump. The outlet of the main electric water pump is connected to the inlet of the engine coolant passage.

2. The engine cooling system as described in claim 1, characterized in that, The engine coolant passage includes a connected cylinder block coolant passage and a cylinder head coolant passage. The integrated passage is located on the engine block. The outlet of the cylinder block coolant passage is connected to the inlet of the cooler assembly. The outlet of the main electric water pump is connected to the inlet of the cylinder block coolant passage, and the outlet of the cylinder head coolant passage is connected to the integrated passage.

3. The engine cooling system as described in claim 2, characterized in that, The engine cooling system also includes a turbocharger cooling pipe for cooling the turbocharger, the outlet of the cylinder block coolant passage is connected to the inlet of the turbocharger cooling pipe, and the outlet of the turbocharger cooling pipe is connected to the integrated channel.

4. The engine cooling system as described in claim 2, characterized in that, The engine cooling system also includes a thermostat, the inlet of which is connected to the outlet of the cylinder head coolant passage, and the outlet of which is connected to the waste heat recovery pipeline and the radiator.

5. The engine cooling system as described in claim 4, characterized in that, The engine cooling system also includes a radiator, the inlet of which is connected to the outlet of the thermostat, and the outlet of which is connected to the main electric water pump.

6. The engine cooling system as described in claim 4, characterized in that, The waste heat recovery pipeline includes: a first three-way pipe, a secondary electronic water pump, a heater, a warm air core, and a three-way valve; The outlet of the first three-way pipe is connected to the inlet of the three-way valve through the auxiliary electronic water pump, the heater, and the warm air core; the first inlet of the first three-way pipe is connected to the outlet of the thermostat; the second inlet of the first three-way pipe is connected to the first outlet of the three-way valve; and the second outlet of the three-way valve is connected to the main electronic water pump.

7. The engine cooling system as described in claim 6, characterized in that, The engine cooling system also includes an expansion tank, the outlet of the heater core is connected to the inlet of the expansion tank, and the outlet of the expansion tank is connected to the main electric water pump.

8. The engine cooling system as described in claim 7, characterized in that, The waste heat recovery pipeline also includes a second three-way pipe, the outlet of the heater core is connected to the inlet of the second three-way pipe, the first outlet of the second three-way pipe is connected to the inlet of the three-way valve, and the second outlet of the second three-way pipe is connected to the inlet of the expansion tank.

9. The engine cooling system as described in claim 7, characterized in that, The outlet of the cylinder head coolant passage is connected to the inlet of the expansion tank, and the outlet of the radiator is connected to the inlet of the expansion tank.

10. A vehicle, characterized in that, Includes the engine cooling system as described in any one of claims 1-9.

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