阅读说明：本技术 发动机冷却系统和汽车 (Engine cooling system and automobile ) 是由 张会文 冯仰利 骆富贵 杨立坤 梁彦勇 陈伟健 石晋 杨文乐 于 2020-08-24 设计创作，主要内容包括：本发明提供了一种发动机冷却系统和汽车,涉及汽车发动机技术领域。发动机冷却系统,包括水泵、缸盖水套和缸体水套,缸盖水套设置有相互连通的第一冷却液入口和第一冷却液出口,第一冷却液入口与水泵连通,缸体水套设置有与第一冷却液出口连通的第二冷却液入口,缸体水套设置有第二冷却液出口,第二冷却液出口与水泵连通,以使来自水泵的冷却液能先进入缸盖水套对缸盖进行冷却后,再流入缸体水套以对发动机缸体进行冷却后回至水泵。汽车包括上述发动机冷却系统。发动机冷却系统有利于提高冷却液的冷量利用效益,降低对发动机性能的影响。(The invention provides an engine cooling system and an automobile, and relates to the technical field of automobile engines. The engine cooling system comprises a water pump, a cylinder cover water jacket and a cylinder body water jacket, wherein the cylinder cover water jacket is provided with a first cooling liquid inlet and a first cooling liquid outlet which are communicated with each other, the first cooling liquid inlet is communicated with the water pump, the cylinder body water jacket is provided with a second cooling liquid inlet communicated with the first cooling liquid outlet, the cylinder body water jacket is provided with a second cooling liquid outlet, and the second cooling liquid outlet is communicated with the water pump, so that cooling liquid from the water pump can firstly enter the cylinder cover water jacket to cool a cylinder cover and then flows into the cylinder body water jacket to cool an engine cylinder body and then returns to the water pump. The automobile comprises the engine cooling system. The engine cooling system is beneficial to improving the utilization benefit of the cooling capacity of the cooling liquid and reducing the influence on the performance of the engine.)

1. The utility model provides an engine cooling system, its characterized in that, includes water pump, cylinder cap water jacket and cylinder body water jacket, the cylinder cap water jacket is provided with first coolant liquid entry and the first coolant liquid export of intercommunication each other, first coolant liquid entry with the water pump intercommunication, the cylinder body water jacket be provided with the second coolant liquid entry of first coolant liquid export intercommunication, the cylinder body water jacket is provided with the second coolant liquid export, the second coolant liquid export with the water pump intercommunication, so that come from the coolant liquid of water pump can get into earlier the cylinder cap water jacket cools off the cylinder cap after, flow in the cylinder body water jacket returns after cooling engine cylinder body to the water pump.

2. The engine cooling system of claim 1, wherein the cylinder head water jacket comprises a cylinder head upper water jacket and a cylinder head lower water jacket, the cylinder head upper water jacket is disposed above the cylinder head lower water jacket, and the first coolant inlet and the first coolant outlet are both disposed in the cylinder head lower water jacket.

3. The engine cooling system according to claim 2, wherein the first coolant inlet is provided on a side of the cylinder head water jacket close to an exhaust side of the engine, and the first coolant outlet is provided on a side of the cylinder head water jacket close to an intake side of the engine.

4. The engine cooling system of claim 2, wherein the head jacket is provided with a third coolant inlet, the head jacket is provided with an interface in communication with the first coolant inlet, and the third coolant inlet is in communication with the interface to allow a portion of the coolant entering the head jacket to enter the head jacket.

5. The engine cooling system according to claim 4, wherein the cylinder head jacket is provided with a third coolant outlet which is communicated with the third coolant inlet and the water pump at the same time, and the third coolant outlet is positioned on one side of the cylinder head jacket close to the exhaust side of the engine.

6. Engine cooling system according to claim 5, characterized in that the third coolant outlet and the second coolant outlet are in communication before being in communication with the water pump.

7. The engine cooling system according to claim 1, characterized in that the engine cooling system includes an oil cooler provided with a fourth coolant inlet and a fourth coolant outlet that communicate with each other, the fourth coolant inlet communicating with the block water jacket, the fourth coolant outlet communicating with the second coolant outlet.

8. Engine cooling system according to claim 1, characterized in that the water pump comprises an electric water pump, which is connected to the first coolant inlet.

9. The engine cooling system of claim 1, comprising a warm air core and an exhaust gas recirculation cooler, an inlet of the warm air core being in communication with the second coolant outlet, an outlet of the warm air core being in communication with an inlet of the exhaust gas recirculation cooler, and an outlet of the exhaust gas recirculation cooler being in communication with the water pump.

10. A vehicle comprising an engine cooling system according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of automobile engines, in particular to an engine cooling system and an automobile.

Background

The engine cooling system has two functions, on one hand, the redundant heat generated when the engine normally works is taken away in time to avoid various adverse phenomena; on the other hand, when the engine is started in a cold state, the engine reaches normal working temperature (quickly warmed up) as soon as possible so as to reduce the friction work of the engine and improve the fuel economy of the engine.

However, in the existing engine cooling system, the coolant directly divides into two parts after flowing out from the water pump, one part flows into the cylinder water jacket, and the other part flows into the cylinder cover water jacket, and the flowing mode is not beneficial to improving the cooling capacity utilization benefit of the coolant and influencing the engine performance.

Disclosure of Invention

The invention aims to provide an engine cooling system and an automobile, which are beneficial to improving the cooling capacity utilization benefit of cooling liquid and reducing the influence on the performance of an engine.

Embodiments of the invention may be implemented as follows:

in a first aspect, an embodiment of the present invention provides an engine cooling system, including a water pump, a cylinder head water jacket and a cylinder body water jacket, where the cylinder head water jacket is provided with a first coolant inlet and a first coolant outlet that are communicated with each other, the first coolant inlet is communicated with the water pump, the cylinder body water jacket is provided with a second coolant inlet that is communicated with the first coolant outlet, the cylinder body water jacket is provided with a second coolant outlet, and the second coolant outlet is communicated with the water pump, so that coolant from the water pump can first enter the cylinder head water jacket to cool a cylinder head, and then flow into the cylinder body water jacket to cool an engine cylinder and then return to the water pump.

In an alternative embodiment, the cylinder head water jacket includes a cylinder head upper water jacket and a cylinder head lower water jacket, the cylinder head upper water jacket is disposed above the cylinder head lower water jacket, and the first coolant inlet and the first coolant outlet are both disposed in the cylinder head lower water jacket.

In an alternative embodiment, the first coolant inlet is provided on the side of the cylinder head water jacket close to the exhaust side of the engine, and the first coolant outlet is provided on the side of the cylinder head water jacket close to the intake side of the engine.

In an alternative embodiment, the cylinder head upper water jacket is provided with a third coolant inlet, the cylinder head lower water jacket is provided with a port communicated with the first coolant inlet, and the third coolant inlet is communicated with the port, so that a part of the coolant entering the cylinder head lower water jacket can enter the cylinder head upper water jacket.

In an alternative embodiment, the water jacket on the cylinder head is provided with a third coolant outlet, the third coolant outlet is communicated with a third coolant inlet and the water pump at the same time, and the third coolant outlet is positioned on one side of the water jacket on the cylinder head, which is close to the exhaust side of the engine.

In an alternative embodiment, the third cooling liquid outlet is communicated with the second cooling liquid outlet and then communicated with the water pump.

In an alternative embodiment, the engine cooling system includes an oil cooler provided with a fourth coolant inlet and a fourth coolant outlet in communication with each other, the fourth coolant inlet being in communication with the block jacket, and the fourth coolant outlet being in communication with the second coolant outlet.

In an alternative embodiment, the water pump comprises an electric water pump connected to the first coolant inlet.

In an alternative embodiment, the engine cooling system comprises a warm air core and an exhaust gas recirculation cooler, wherein an inlet of the warm air core is communicated with the second cooling liquid outlet, an outlet of the warm air core is communicated with an inlet of the exhaust gas recirculation cooler, and an outlet of the exhaust gas recirculation cooler is communicated with the water pump.

In a second aspect, an embodiment of the invention provides an automobile comprising the engine cooling system of any one of the preceding embodiments.

The embodiment of the invention has the beneficial effects that:

the engine cooling system comprises a water pump, a cylinder cover water jacket and a cylinder body water jacket. The cooling liquid carries sufficient cold volume when flowing out from the water pump to can cool off the cylinder cap as far as possible when the cooling liquid flows into the cylinder cap water jacket earlier, thereby take away the heat near the cylinder cap as far as possible. Then, the cooling liquid flowing out of the cylinder cover water jacket enters the cylinder body water jacket to cool the cylinder body, the cooling capacity carried by the cooling liquid is reduced, the heat is increased, and the temperature of the cylinder body is not too low when the cylinder body is cooled, so that the friction between the engine piston and the cylinder barrel is reduced, and the performance of the engine is improved. The cooling liquid in the engine cooling system flows to ensure that the cooling capacity distribution is more reasonable, a better cooling effect can be obtained by using smaller cooling liquid flow, the cooling capacity utilization benefit of the cooling liquid is favorably improved, and meanwhile, the influence on the performance of the engine can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a cylinder block water jacket and a cylinder head water jacket in an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a cylinder head according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the engine cooling system according to an embodiment of the present invention;

fig. 4 is a flow path diagram of the cooling liquid in the cylinder head water jacket and the cylinder block water jacket in the embodiment of the invention.

Icon: 100-an engine cooling system; 110-a water pump; 120-cylinder cover water jacket; 121-first coolant inlet; 122 — first coolant outlet; 123-water jacket on the cylinder cover; 124-cylinder cover lower water jacket; 125-a third coolant inlet; 126-a third coolant outlet; 127-an interface; 140-cylinder jacket; 141-a second coolant inlet; 142-a second coolant outlet; 144-a manifold; 150-oil cooler; 151-fourth coolant inlet; 152-a fourth coolant outlet; 160-warm air core body; 170-exhaust gas recirculation cooler; 175-a supercharger; 180-thermostat; 181-a radiator; 182-an expansion tank; 184-bypass line.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

In an engine cooling system in an existing automobile, coolant carrying a large amount of cold energy directly divides into two paths after flowing out of a water pump, one path of coolant flows through a cylinder cover water jacket to cool a cylinder cover, the other path of coolant passes through a cylinder body water jacket to cool a cylinder body, and the coolant absorbing heat can return to the water pump after releasing heat so as to realize circulation of the coolant. The cylinder cover water jacket and the cylinder body water jacket are cooling liquid flowing channels in the cylinder cover or the cylinder body. However, the cooling requirements of the engine cylinder block and the cooling requirements of the cylinder head are not completely the same, the reduction of the temperature of the cylinder head is beneficial to accelerating the cooling of the engine, and the cylinder block is easy to influence the viscosity of oil if being cooled excessively, so that the friction between the engine piston and the cylinder barrel is improved. Therefore, in the conventional engine cooling system, the cooling capacity utilization efficiency of the coolant is low.

To solve the above problem, referring to fig. 1, fig. 2 and fig. 3, the present embodiment provides an automobile, which includes an engine cooling system 100, wherein the engine cooling system 100 takes away the excessive heat generated during the normal operation of the engine in time to avoid various undesirable phenomena.

Engine cooling system 100 includes a water pump 110, a head jacket 120, and a block jacket 140. The head water jacket 120 is provided with a first coolant inlet 121 and a first coolant outlet 122 that communicate with each other, and the first coolant inlet 121 communicates with the water pump 110. The block water jacket 140 is provided with a second coolant inlet 141 communicated with the first coolant outlet 122, the block water jacket 140 is provided with a second coolant outlet 142, and the second coolant outlet 142 is communicated with the water pump 110, so that the coolant from the water pump 110 can firstly enter the head water jacket 120 to cool the head, and then flow into the block water jacket 140 to cool the engine block and then return to the water pump 110.

In this embodiment, since engine cooling system 100 has a low performance requirement on water pump 110, water pump 110 includes an electric water pump connected to first coolant inlet 121. Specifically, an outlet of the water pump 110 is connected to the first coolant inlet 121, so that the coolant flowing out of the water pump 110 can enter the head water jacket 120. In other embodiments, the water pump 110 may also be a mechanical water pump 110.

In the present embodiment, the head water jacket 120 includes a head upper water jacket 123 and a head lower water jacket 124. The cylinder head upper water jacket 123 is provided above the cylinder head lower water jacket 124, and the first coolant inlet 121 and the first coolant outlet 122 are both provided in the cylinder head lower water jacket 124. Specifically, in order to further achieve the heat dissipation effect, the cylinder head lower water jacket 124 is located between the cylinder block water jacket 140 and the cylinder head upper water jacket 123, the first coolant inlet 121 is disposed on the side of the cylinder head lower water jacket 124 close to the exhaust side of the engine, and the first coolant outlet 122 is disposed on the side of the cylinder head lower water jacket 124 close to the intake side of the engine. Thereby, the coolant flows from the exhaust side to the intake side. The hottest region of the engine is an integrated exhaust manifold and a combustion chamber, so that the exhaust side has more waste heat, if the cooling liquid flows from the air inlet side to the exhaust side, the cooling liquid can firstly absorb the waste heat of the air inlet side and then cools the exhaust side, the heat exchange between the hottest region and the maximum cooling capacity of the cooling liquid cannot be realized, and the heat dissipation effect of the engine is influenced.

It is understood that in other embodiments, the cylinder head water jacket 120 may not be divided into the cylinder head upper water jacket 123 and the cylinder head lower water jacket 124, and only needs to be arranged according to actual needs.

Meanwhile, the head upper water jacket 123 is provided with a third coolant inlet 125 and a third coolant outlet 126. The head lower water jacket 124 is provided with a port 127 communicating with the first coolant inlet 121, the port 127 being located between the first coolant inlet 121 and the first coolant outlet 122. The third coolant inlet 125 communicates with the interface 127 to allow a portion of the coolant entering the under head jacket 124 to enter the on head jacket 123. Referring to fig. 4, that is, in the present embodiment, when the coolant flows through the cylinder head lower water jacket 124, a part of the coolant flows into the cylinder head water jacket 140 from the first coolant outlet 122, and another part of the coolant enters the cylinder head upper water jacket 123 from the interface 127, so that the cooling of the entire cylinder head is completed. The third coolant outlet 126 is communicated with the third coolant inlet 125 and the water pump 110 at the same time, and the third coolant outlet 126 is positioned on the side of the water jacket 123 on the cylinder head close to the exhaust side of the engine. That is, the coolant flowing out of the head upper water jacket 123 is eventually returned to the water pump 110. The flow distribution of the coolant entering the cylinder head jacket 123 and the coolant entering the cylinder block jacket 140 can be adjusted by setting the size of the interface 127, and in this embodiment, to achieve a better cooling effect, the coolant entering the cylinder head jacket 123 accounts for 70%, and the coolant entering the cylinder block jacket 140 accounts for 30%.

In this embodiment, to save space, the third coolant outlet 126 and the second coolant outlet 142 are connected to the water pump 110. Specifically, the third coolant outlet 126 and the second coolant outlet 142 each communicate with a manifold 144, and the manifold 144 communicates with an inlet of the water pump 110. Therefore, the coolant flowing out of the head water jacket 123 and the coolant flowing out of the block water jacket 140 are merged together and finally returned to the water pump 110. It is understood that in other embodiments, the third coolant outlet 126 and the second coolant outlet 142 may not be communicated with each other, so that the coolant flowing out of the head water jacket 123 and the coolant flowing out of the block water jacket 140 may be respectively returned to the water pump 110.

The block water jacket 140 is located below the head water jacket 120. Coolant enters the block jacket 140 from a second coolant inlet 141 and exits the block jacket 140 from a second coolant outlet 142. In the present embodiment, the engine cooling system 100 further includes an oil cooler 150, the oil cooler 150 is provided with a fourth coolant inlet 151 and a fourth coolant outlet 152 which are communicated with each other, the fourth coolant inlet 151 is communicated with the block water jacket 140, and the fourth coolant outlet 152 is communicated with the second coolant outlet 142. Thus, a part of the coolant entering the cylinder water jacket 140 can enter the oil cooler 150 through the fourth coolant inlet 151 to cool the oil, another part passes through the cylinder water jacket 140 to cool the cylinder, and the coolant flowing out through the oil cooler 150 can join the coolant passing through the cylinder water jacket 140 and finally return to the water pump 110. That is, in the present embodiment, the parallel relationship between the oil cooler 150 and the block water jacket 140 is similar, which can effectively reduce the performance requirement for the water pump 110. It is understood that in other embodiments, the fourth cooling liquid outlet 152 may be connected to the water pump 110 instead of the second cooling liquid outlet 142, and only needs to be set according to actual needs.

In the present embodiment, the engine cooling system 100 includes a warm air core 160 and an exhaust gas recirculation cooler 170. The inlet of the warm air core 160 is communicated with the second cooling liquid outlet 142, in detail, the inlet of the warm air core 160 is communicated with the collecting pipe 144, the outlet of the warm air core 160 is communicated with the inlet of the egr cooler 170, and the outlet of the egr cooler 170 is communicated with the water pump 110. Because the coolant liquid that flows out from cylinder cap upper water jacket 123, cylinder body water jacket 140 converges together and has carried certain heat, thereby this part heat can be by reutilization in warm braw core 160, because the coolant liquid absorbs thermal effect better when upstream, thereby can carry out more efficient heat transfer in warm braw core 160, can provide more heat for warm braw core 160, so that warm braw core 160 can produce more warm braws, not only be favorable to energy-conservation but also be favorable to the cooling of coolant liquid. The cooling liquid passing through the warm air core 160 carries the cold energy again and enters the exhaust gas recirculation cooler 170, and a part of the exhaust gas discharged by the automobile is cooled to facilitate subsequent recycling, so that the environment friendliness is improved, and the energy conservation and emission reduction are better realized. The outlet of the egr cooler 170 communicates with the inlet of the water pump 110, and the coolant flowing out of the egr cooler 170 finally flows back to the water pump 110 to perform a new cooling cycle.

In addition, since the coolant flowing out of the head water jacket 120 and the block water jacket 140 still carries some cooling energy, in this embodiment, the manifold 144 is also connected to the inlet of the supercharger 175, so that the coolant flowing out of the head water jacket 120 and the block water jacket 140 can further cool the supercharger 175. The outlet of the booster 175 is connected to the inlet of the water pump 110.

In addition, in the present embodiment, the engine system further includes a thermostat 180, a radiator 181, and an expansion tank 182. Thermostat 180 has a first joint, a second joint, and a third joint. The first joint communicates with the manifold 144, the second joint communicates with the radiator 181, and the third joint communicates with the inlet of the water pump 110 through a bypass line 184. When the temperature of the coolant in the manifold 144 is too high, the first joint communicates with the second joint, so that the coolant enters the radiator 181 for heat dissipation. When the temperature is not too high, the first joint is communicated with the third joint, and the cooling liquid passes through the bypass line 184 and returns to the water pump 110. The thermostat 180 automatically adjusts the amount of water entering the radiator 181 according to the temperature of the cooling water, and changes the circulation range of the water to adjust the heat dissipation capacity of the cooling system, thereby ensuring that the engine works in a proper temperature range. Thermostat 180 must maintain good state of the art or otherwise severely affect the proper operation of the engine.

The inlet of the expansion tank 182 communicates with the manifold 144 and the outlet of the expansion tank 182 communicates with the inlet of the water pump 110. The radiator 181 communicates not only with the water pump 110 but also with the inlet of the expansion tank 182. The expansion tank 182 is used for exhausting gas generated by the expansion and contraction of the coolant to maintain the normal circulation of the coolant throughout the engine cooling system 100.

The operating principle and operation of the engine cooling system 100 are as follows:

the coolant enters the cylinder head lower water jacket 124 from the first coolant inlet 121 under the driving of the water pump 110, 70% of the coolant enters the cylinder head upper water jacket 123 through the interface 127, and 30% of the coolant enters the cylinder head water jacket 140 through the first coolant outlet 122. After entering the head water jacket 123, the coolant flows out from the third coolant outlet 126 to the manifold 144, thereby cooling the head.

After the coolant enters the block water jacket 140, a part of the coolant enters the oil cooler 150 through the fourth coolant inlet 151, so that the oil cooler 150 cools the oil. The coolant passing through the oil cooler 150 flows out to the manifold 144 from the fourth coolant outlet 152. Therefore, all the coolant passing through the head water jacket 120 and the block water jacket 140 flows out together.

A part of the cooling liquid flowing through the collecting pipe 144 can be used for cooling the supercharger 175, and a part of the cooling liquid can be used for cooling the exhaust gas recirculation cooler 170 after supplying heat to the warm air core 160, so that the energy utilization rate is effectively improved, and energy conservation and emission reduction are facilitated. Meanwhile, the radiator 181 can dissipate the heat of the cooling liquid in time, and the expansion tank 182 can exhaust the gas generated by expansion with heat and contraction with cold in time, so as to maintain the normal circulation of the cooling system. Eventually all of the coolant flows back to the inlet of the water pump 110 for the next cycle.

The engine cooling system 100 can enable cooling liquid to flow through the cylinder cover water jacket 120 and then flow through the cylinder body water jacket 140, cool the cylinder cover when the cooling liquid carries the most cooling capacity, and then cool the cylinder body with lower cooling requirement, so that the cooling capacity can be utilized to the maximum while the better cooling effect is obtained, the performance of the engine can be improved, and the better energy-saving effect can be realized.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.