Engine cooling system and vehicle

Abstract

The application belongs to the technical field of engine cooling systems, and particularly relates to an engine cooling system and an automobile. The engine cooling system comprises a first cylinder block water jacket, a second cylinder block water jacket, a cylinder head water jacket and a driving element. The engine cooling system of the application delivers the cooling liquid to the first cylinder block water jacket and the cylinder head water jacket through the driving element. The cooling liquid enters the first cylinder block water jacket at a lower temperature to directly cool the upper part of the cylinder block, and the cooling liquid enters the cylinder head water jacket to cool the cylinder head. The cooling liquid that has absorbed heat in the cylinder head water jacket enters the second cylinder block water jacket to exchange heat with the lower part of the cylinder block, thereby shortening the warm-up time of the lower part of the cylinder block. Through this zoned cooling method, the temperature gradient of the upper part and the lower part of the cylinder block is significantly reduced, thereby ensuring the stable operation of the engine under the condition of uniform temperature distribution.

Description

Technical Field

[0001] This application belongs to the technical field of engine cooling systems, specifically relating to engine cooling systems and automobiles. Background Technology

[0002] During engine operation, friction between the piston rings and cylinder bores, as well as fuel combustion, generate a significant amount of heat. Although coolant and air cool the cylinder periphery, and engine oil carries away some heat, the temperature inside the cylinder bore remains high. The upper part of the cylinder wall may exceed 370°C, while the lower part may be below 150°C. This temperature gradient results in a significant temperature difference within the cylinder block, affecting the effective dissipation of internal heat. Simultaneously, the high-temperature environment promotes lubricant oxidation and carbon deposit formation, potentially leading to abnormal combustion and causing problems such as cylinder block deformation, cylinder head gasket damage, and component wear. Summary of the Invention

[0003] One objective of this application is to provide an engine cooling system that enables the upper and lower parts of the engine cylinder block to be cooled at a uniform temperature, thereby reducing the temperature gradient within the cylinder block and ensuring stable engine operation.

[0004] Another objective of this application is to provide an automobile that includes the aforementioned engine cooling system.

[0005] According to embodiments of this application, a first aspect provides an engine cooling system, the engine cooling system comprising:

[0006] A first cylinder block water jacket is disposed on the upper part of the cylinder block, and the coolant in the first cylinder block water jacket is used to cool the upper part of the cylinder block.

[0007] A second cylinder block water jacket is disposed on the lower part of the cylinder block, and the coolant in the second cylinder block water jacket is used to cool the lower part of the cylinder block;

[0008] A cylinder head water jacket is provided on the cylinder head, and the coolant in the cylinder head water jacket is used to cool the cylinder head. The outlet of the cylinder head water jacket is connected to the second cylinder block water jacket.

[0009] A drive element is used to deliver coolant to the first cylinder block water jacket and the cylinder head water jacket respectively, and the coolant discharged from the first cylinder block water jacket and the second cylinder head water jacket is circulated to the drive element.

[0010] In one embodiment, the engine cooling system further includes a thermostat module and a flow regulating valve. The thermostat module is used to detect the engine temperature, and the flow regulating valve is connected to the drive element, the first cylinder block water jacket, and the cylinder head water jacket. The flow regulating valve adjusts the flow ratio of coolant to the first cylinder block water jacket and the cylinder head water jacket according to the engine temperature detected by the thermostat module.

[0011] In one embodiment, a first throttle valve is provided at the outlet of the first cylinder block water jacket. The first throttle valve is electrically connected to the thermostat module, and the first throttle valve adjusts the flow rate of coolant flowing out of the first cylinder block water jacket according to the temperature value of the thermostat module.

[0012] In one embodiment, the engine cooling system further includes a bypass channel that communicates with the outlet of the cylinder head water jacket and is used to deliver coolant to the heater core for heat exchange.

[0013] In one embodiment, the outlet of the bypass channel is further provided with a second throttle valve, which is electrically connected to the thermostat module. The second throttle valve adjusts the flow rate of the coolant from the bypass channel to the heater core according to the temperature value of the thermostat module.

[0014] In one embodiment, the engine cooling system further includes a radiator in communication with the drive element for reducing the temperature of the coolant.

[0015] In one embodiment, the outlet of the cylinder head water jacket is also connected to an oil cooler for heat exchange between the coolant discharged from the cylinder head water jacket and the engine oil.

[0016] In one embodiment, the cylinder head water jacket and the oil cooler are also connected to the turbocharger through a parallel pipeline. Part of the coolant discharged from the cylinder head water jacket flows through the turbocharger and merges with the coolant flowing directly from the cylinder head water jacket before flowing into the oil cooler.

[0017] In one embodiment, the cylinder head water jacket is also connected to an exhaust gas recirculation cooler for heat exchange between the coolant discharged from the cylinder head water jacket and the exhaust gas recirculation cooler.

[0018] According to an embodiment of this application, a second aspect provides an automobile that includes the aforementioned engine cooling system.

[0019] The engine cooling system of this application delivers coolant to the first cylinder block water jacket and the cylinder head water jacket via a drive element. The coolant enters the first cylinder block water jacket at a lower temperature, directly cooling the upper part of the cylinder block. Simultaneously, the coolant enters the cylinder head water jacket to cool the cylinder head. After absorbing heat in the cylinder head water jacket, the coolant enters the second cylinder block water jacket, further exchanging heat with the lower part of the cylinder block, thus shortening the warm-up time for the lower part of the cylinder block. This zoned cooling method significantly reduces the temperature gradient between the upper and lower parts of the cylinder block, thereby ensuring stable engine operation under conditions of uniform temperature distribution. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the engine cooling system in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the engine cooling system module in another embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the engine cooling system in another embodiment of this application.

[0023] Explanation of the attached drawing numbers:

[0024] 110. First cylinder block water jacket; 120. Second cylinder block water jacket; 130. Cylinder head water jacket;

[0025] 140. Bypass channel; 200. Drive element; 300. Temperature controller module;

[0026] 410. Flow regulating valve; 420. First throttle valve; 430. Second throttle valve;

[0027] 510. Heater core; 520. Radiator; 530. Oil cooler; 540. Turbocharger;

[0028] 550. Exhaust gas recirculation cooler. Detailed Implementation

[0029] 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.

[0030] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention.

[0031] The structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0032] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "lateral," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They 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, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] As mentioned in the background, during engine operation, friction between the piston rings and cylinder bores, as well as fuel combustion, generate a significant amount of heat. Although coolant and air cool the cylinder periphery, and engine oil carries away some heat, the temperature of the cylinder bore inner wall remains high. The upper part of the cylinder inner wall may exceed 370°C, while the lower part may be below 150°C. This temperature gradient results in a significant temperature difference within the cylinder block, affecting the effective dissipation of internal heat. Simultaneously, the high-temperature environment promotes lubricant oxidation and carbon deposit formation, potentially leading to abnormal combustion, cylinder block deformation, cylinder head gasket damage, and component wear. To better address this issue, researchers have proposed an engine cooling system. This system ensures a more uniform cooling temperature between the upper and lower parts of the cylinder block, thereby reducing the temperature gradient within the cylinder and ensuring stable engine operation.

[0034] like Figure 1 As shown, Figure 1 This is a schematic diagram of an engine cooling system according to one embodiment of this application. The engine cooling system includes: a first cylinder block water jacket 110, a second cylinder block water jacket 120, a cylinder head water jacket 130, and a drive element 200. The coolant entering the first cylinder block water jacket 110 is used to cool the upper part of the cylinder block, the coolant entering the second cylinder block water jacket 120 is used to cool the lower part of the cylinder block, and the coolant entering the cylinder head water jacket 130 is used to cool the cylinder head. The researchers intend to significantly reduce the temperature gradient between the upper and lower parts of the cylinder block through the proposed engine cooling system, thereby enabling the engine to operate stably under conditions of uniform temperature distribution.

[0035] Specifically, the first cylinder block water jacket 110 is disposed on the upper part of the cylinder block, and the coolant in the first cylinder block water jacket 110 is used to cool the upper part of the cylinder block; the second cylinder block water jacket 120 is disposed on the lower part of the cylinder block, and the coolant in the second cylinder block water jacket 120 is used to cool the lower part of the cylinder block; the cylinder head water jacket 130 is disposed on the cylinder head, and the coolant in the cylinder head water jacket 130 is used to cool the cylinder head, and the outlet of the cylinder head water jacket 130 is connected to the second cylinder block water jacket 120; the drive element 200 is used to deliver coolant to the first cylinder block water jacket 110 and the cylinder head water jacket 130 respectively, and the coolant discharged from the first cylinder block water jacket 110 and the second cylinder block water jacket 120 is circulated and delivered to the drive element 200, which can be a water pump.

[0036] In this embodiment, when the engine is running, the drive element 200 delivers coolant to the first cylinder block water jacket 110 and the cylinder head water jacket 130, respectively. After flowing out of the drive element 200, the coolant enters the first cylinder block water jacket 110 and the cylinder head water jacket 130, respectively. After entering the first cylinder block water jacket 110, the coolant exchanges heat with the upper part of the cylinder block, thereby reducing the temperature of the upper part of the cylinder block; at the same time, the coolant enters the cylinder head water jacket 130, exchanges heat with the cylinder head, reduces the cylinder head temperature, and prevents the cylinder head from overheating. The coolant, after absorbing heat, flows out of the cylinder head water jacket 130 and enters the second cylinder block water jacket 120, where it exchanges heat with the lower part of the cylinder block to increase the temperature of the lower part of the cylinder block, reduce the temperature difference between the upper and lower parts of the cylinder block, and shorten the warm-up time of the lower part of the cylinder block. By implementing partitioned cooling of the cylinder block through the first cylinder block water jacket 110 and the second cylinder block water jacket 120 in the engine cooling system of this embodiment, the temperature gradient between the upper and lower parts of the cylinder block is significantly reduced, effectively avoiding problems such as cylinder block deformation, cylinder head gasket damage and component wear, and ensuring stable engine operation.

[0037] Another function of this embodiment is that in existing engine cooling systems, the coolant typically flows from the cylinder block water jacket to the cylinder head water jacket 130, and must pass through small holes in the cylinder head gasket. However, the flow resistance of these small holes in the cylinder head gasket can restrict coolant flow, thus affecting cooling efficiency. In this embodiment, the coolant is directly delivered to the first cylinder block water jacket 110 and the cylinder head water jacket 130 via the drive element 200, and further delivered to the second cylinder block water jacket 120 after heat absorption via the cylinder head water jacket 130. This effectively avoids the flow resistance problem caused by the small holes in the cylinder head gasket in traditional solutions, optimizing the coolant flow path.

[0038] In one embodiment, see Figure 2As shown, the engine cooling system also includes a thermostat module 300 and a flow regulating valve 410. The thermostat module 300 is used to detect the engine temperature. The flow regulating valve 410 is connected to the drive element 200, the first cylinder block water jacket 110 and the cylinder head water jacket 130. The flow regulating valve 410 adjusts the flow ratio of coolant to the first cylinder block water jacket 110 and the cylinder head water jacket 130 according to the engine temperature detected by the thermostat module 300.

[0039] In this embodiment, the thermostat module 300 can monitor the engine temperature in real time and transmit the temperature data to the flow regulating valve 410. Based on the temperature information transmitted by the thermostat module 300, the flow regulating valve 410 dynamically adjusts the flow distribution ratio of coolant between the first cylinder block water jacket 110 and the cylinder head water jacket 130. When the temperature of the upper part of the cylinder block is high, the flow regulating valve 410 increases the proportion of coolant flowing to the first cylinder block water jacket 110, allowing more coolant to flow through the first cylinder block water jacket 110 and exchange heat with the upper part of the cylinder block, thereby effectively reducing the temperature of the upper part of the cylinder block. When the cylinder head temperature is high, the flow regulating valve 410 increases the proportion of coolant flowing to the cylinder head water jacket 130, allowing more coolant to flow through the cylinder head water jacket 130 and exchange heat with the cylinder head, thereby reducing the temperature of the cylinder head.

[0040] The flow rate of the coolant is dynamically adjusted by the thermostat module 300 and the flow regulating valve 410 in this embodiment, so that the coolant can be precisely controlled according to the actual temperature distribution of the cylinder block and cylinder head in the engine, thereby ensuring a more uniform temperature in the upper part of the cylinder block, the lower part of the cylinder block and the cylinder head.

[0041] In one embodiment, see Figure 2 As shown, a first throttle valve 420 is provided at the outlet of the first cylinder block water jacket 110. The first throttle valve 420 is electrically connected to the thermostat module 300. The first throttle valve 420 adjusts the flow rate of coolant out of the first cylinder block water jacket 110 according to the temperature value of the thermostat module 300.

[0042] In this embodiment, when the engine is initially started, the thermostat module 300 detects that the temperature of the upper part of the cylinder block is low. At this time, the flow rate of the coolant is controlled to preheat the cylinder block and shorten the warm-up time. Specifically, the thermostat module 300 controls the opening of the first throttle valve 420 according to the detected temperature signal. When the coolant flows out of the first cylinder block water jacket 110 too quickly, which may prolong the warm-up time of the cylinder block, the first throttle valve 420 reduces the flow rate according to the temperature signal from the thermostat module 300, thereby increasing the residence time of the coolant in the first cylinder block water jacket 110, allowing the cylinder block to complete the warm-up process more efficiently. When the temperature of the upper part of the cylinder block is high, the thermostat module 300 sends an adjustment signal to the first throttle valve 420, and the first throttle valve 420 increases the flow rate of the coolant, thereby increasing the flow rate of the coolant in the first cylinder block water jacket 110, accelerating the heat exchange process of the upper part of the cylinder block, and achieving rapid cooling. By setting a first throttle valve 420 at the outlet of the first cylinder block water jacket 110, dynamic control of the coolant flow rate at the outlet of the first cylinder block water jacket 110 is achieved, thereby effectively shortening the warm-up time when the engine starts and dynamically adjusting the cooling rate of the upper part of the cylinder block during engine operation, thus significantly reducing the temperature gradient of the cylinder block, ensuring uniform heat distribution, and improving the overall stability of engine operation.

[0043] In one embodiment, see Figure 2 As shown, the engine cooling system also includes a bypass passage 140, which is connected to the outlet of the cylinder head water jacket 130 and is used to deliver coolant to the heater core 510 for heat exchange.

[0044] In this embodiment, the bypass passage 140 in the engine cooling system is connected to the outlet of the cylinder head water jacket 130. After the coolant absorbs heat from the cylinder head water jacket 130, the bypass passage 140 guides the coolant to the heater core 510 for heat exchange. By introducing the coolant that has absorbed heat from the cylinder head into the heater core 510 through the bypass passage 140, the heater core 510 can utilize the heat carried by the coolant, thus achieving secondary utilization of heat. By introducing heat from the cylinder head water jacket 130 to the heater core 510 through the bypass passage 140 in this embodiment, the heat energy in the coolant is effectively recovered, improving energy utilization efficiency.

[0045] In one embodiment, see Figure 2 As shown, the outlet of the bypass channel 140 is also provided with a second throttle valve 430. The second throttle valve 430 is electrically connected to the thermostat module 300. The second throttle valve 430 adjusts the flow rate of the coolant in the bypass channel 140 to the heater core 510 according to the temperature value of the thermostat module 300.

[0046] In this embodiment, when the engine is initially started, the thermostat module 300 detects that the cylinder head temperature is low. At this time, it is necessary to reduce the transfer of coolant to the heater core 510 to avoid excessive heat loss. To this end, the second throttle valve 430 adjusts its opening according to the temperature signal from the thermostat module 300, reducing the flow of coolant into the heater core 510 through the bypass channel 140, thereby maintaining the heat concentration in the cylinder head and shortening the engine warm-up time. When the cylinder head temperature is high, the thermostat module 300 sends an adjustment signal to the second throttle valve 430, which increases its opening, allowing more coolant to enter the heater core 510 through the bypass channel 140, fully exchanging heat with the heater core 510 and improving the thermal efficiency of the heater core 510. By setting a second throttle valve 430 at the outlet of the bypass channel 140, and combining it with the real-time monitoring and control of the thermostat module 300, the flow rate of coolant entering the heater core 510 is dynamically adjusted, which not only meets the cooling requirements of the engine under different operating conditions, but also realizes the effective reuse of coolant heat energy.

[0047] In one embodiment, see Figure 2 As shown, the engine cooling system also includes a radiator 520, which is connected to the drive element 200 and is used to reduce the temperature of the coolant.

[0048] In this embodiment, the radiator 520 is connected to the drive element 200. When the coolant absorbs heat from the engine cooling system and flows through the radiator 520, the radiator 520 exchanges heat with the outside air, reducing the temperature of the coolant. After being cooled by the radiator 520, the coolant re-enters the drive element 200 and is delivered to the first cylinder block water jacket 110 and the cylinder head water jacket 130, further cooling the upper part of the cylinder block and the cylinder head. By installing the radiator 520 in the engine cooling system, effective temperature control during the coolant circulation process is achieved, preventing the coolant temperature from becoming too high and affecting the cooling effect.

[0049] In one embodiment, see Figure 3 As shown, the outlet of the cylinder head water jacket 130 is also connected to the oil cooler 530, which is used to exchange heat between the coolant discharged from the cylinder head water jacket 130 and the engine oil.

[0050] In this embodiment, the outlet of the cylinder head water jacket 130 is connected to the oil cooler 530. Coolant discharged from the cylinder head water jacket 130 can enter the oil cooler 530 and exchange heat with the engine oil. The coolant absorbs heat from the engine oil in the oil cooler 530, thereby lowering the oil temperature and preventing problems such as decreased lubrication performance and accelerated oxidation caused by overheating. By connecting the cylinder head water jacket 130 to the oil cooler 530, the heat of the coolant is reused, further enhancing the overall heat dissipation capacity of the engine cooling system and the temperature control effect of the engine oil.

[0051] In one embodiment, see Figure 3 As shown, the cylinder head water jacket 130 and the oil cooler 530 are also connected to the turbocharger 540 through a parallel pipeline. Part of the coolant discharged from the cylinder head water jacket 130 flows through the turbocharger 540 and merges with the coolant flowing directly from the cylinder head water jacket 130 before flowing into the oil cooler 530.

[0052] In this embodiment, the cylinder head water jacket 130 and the oil cooler 530 are connected to the turbocharger 540 via a parallel pipeline. Part of the coolant discharged from the cylinder head water jacket 130 flows through the turbocharger 540, exchanging heat with the turbine and related high-temperature components in the turbocharger 540, thereby reducing the turbine's operating temperature and improving the turbocharger 540's heat dissipation capacity. After heat exchange in the turbocharger 540, the coolant merges with the coolant flowing directly from the cylinder head water jacket 130 and flows together into the oil cooler 530, where it further exchanges heat with the engine oil, achieving precise control of the engine oil temperature. By setting a parallel pipeline between the cylinder head water jacket 130 and the oil cooler 530 and connecting it to the turbocharger 540, the coolant simultaneously cools the turbine components and engine oil of the turbocharger 540 during circulation, thereby enhancing the overall thermal management capability of the cooling system.

[0053] In one embodiment, see Figure 3 As shown, the cylinder head water jacket 130 is also connected to the exhaust gas recirculation cooler 550, which is used to exchange heat between the coolant discharged from the cylinder head water jacket 130 and the exhaust gas recirculation cooler 550.

[0054] In this embodiment, the cylinder head water jacket 130 is connected to the exhaust gas recirculation (EGR) cooler 550. Coolant discharged from the cylinder head water jacket 130 flows into the EGR cooler 550, exchanging heat with the exhaust gas and reducing its temperature. By transferring the heat absorbed in the cylinder head water jacket 130 to the EGR cooler 550, the thermal load on components caused by high temperatures during exhaust gas recirculation can be effectively reduced, while simultaneously lowering the exhaust gas recirculation temperature and improving the efficiency of exhaust gas recirculation.

[0055] This application also proposes a vehicle that includes the aforementioned engine cooling system.

[0056] In this embodiment, by using the engine cooling system described above in the automobile, the upper and lower parts of the cylinder block are cooled in separate zones, which effectively reduces the temperature gradient inside the cylinder block and avoids problems such as cylinder block deformation, cylinder head gasket damage and component wear caused by temperature differences, thereby ensuring the stable operation of the engine.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above embodiments merely illustrate 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 the invention 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, The engine cooling system includes: A first cylinder block water jacket (110) is provided on the upper part of the cylinder block, and the coolant in the first cylinder block water jacket (110) is used to cool the upper part of the cylinder block. A second cylinder block water jacket (120) is provided on the lower part of the cylinder block, and the coolant in the second cylinder block water jacket (120) is used to cool the lower part of the cylinder block. A cylinder head water jacket (130) is provided on the cylinder head. The coolant in the cylinder head water jacket (130) is used to cool the cylinder head. The outlet of the cylinder head water jacket (130) is connected to the inlet of the second cylinder block water jacket (120) in the first cylinder block water jacket (110) and the second cylinder block water jacket (120). The coolant that has absorbed heat flowing out of the cylinder head water jacket (130) enters the second cylinder block water jacket (120) and exchanges heat with the lower part of the cylinder block. A drive element (200) is used to deliver coolant to the first cylinder block water jacket (110) and the cylinder head water jacket (130) respectively. The outlet of the first cylinder block water jacket (110) and the outlet of the second cylinder block water jacket (120) are connected to the drive element. The coolant discharged from the first cylinder block water jacket (110) and the second cylinder block water jacket (120) is circulated and delivered to the drive element (200). A thermostat module (300) and a flow regulating valve (410) are provided. The thermostat module (300) is used to detect the engine temperature. The flow regulating valve (410) is connected to the drive element (200), the first cylinder block water jacket (110), and the cylinder head water jacket (130). The flow regulating valve (410) adjusts the flow ratio of coolant to the first cylinder block water jacket (110) and the cylinder head water jacket (130) according to the engine temperature detected by the thermostat module (300).

2. The engine cooling system according to claim 1, characterized in that: A first throttle valve (420) is provided at the outlet of the first cylinder block water jacket (110). The first throttle valve (420) is electrically connected to the thermostat module (300). The first throttle valve (420) adjusts the flow rate of coolant out of the first cylinder block water jacket (110) according to the temperature value of the thermostat module (300).

3. The engine cooling system according to claim 1, characterized in that: The engine cooling system also includes a bypass channel (140) which is connected to the outlet of the cylinder head water jacket (130) and is used to deliver coolant to the heater core (510) for heat exchange.

4. The engine cooling system according to claim 3, characterized in that: The outlet of the bypass channel (140) is also provided with a second throttle valve (430), which is electrically connected to the thermostat module (300). The second throttle valve (430) adjusts the flow rate of the coolant in the bypass channel (140) to the heater core (510) according to the temperature value of the thermostat module (300).

5. The engine cooling system according to claim 1, characterized in that: The engine cooling system also includes a radiator (520) which is connected to the drive element (200) and is used to reduce the temperature of the coolant.

6. The engine cooling system according to claim 1, characterized in that: The outlet of the cylinder head water jacket (130) is also connected to the oil cooler (530) for heat exchange between the coolant discharged from the cylinder head water jacket (130) and the oil.

7. The engine cooling system according to claim 6, characterized in that: The cylinder head water jacket (130) and the oil cooler (530) are also connected to the turbocharger (540) through a parallel pipeline. Part of the coolant discharged from the cylinder head water jacket (130) flows through the turbocharger (540) and merges with the coolant flowing directly from the cylinder head water jacket (130) before flowing into the oil cooler (530).

8. The engine cooling system according to claim 1, characterized in that: The cylinder head water jacket (130) is also connected to the exhaust gas recirculation cooler (550) for heat exchange between the coolant discharged from the cylinder head water jacket (130) and the exhaust gas recirculation cooler (550).

9. A car, characterized in that: The vehicle includes the engine cooling system as described in any one of claims 1 to 8.

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