CN111828156A

CN111828156A - System and method for cooling engine and vehicle

Info

Publication number: CN111828156A
Application number: CN201910303200.7A
Authority: CN
Inventors: 陈祥斌; 武洁云; 卜令山; 李健; 杨立宏
Original assignee: Peugeot Citroen Automobiles SA
Current assignee: PSA Automobiles SA
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-10-27

Abstract

The invention relates to the technical field of vehicle parts, in particular to a system and a method for cooling an engine and a vehicle. The system comprises: a water pump; the water pump comprises a cylinder body, wherein a cylinder cover is arranged above the cylinder body, a water jacket communicated with a water pump fluid is arranged in the cylinder body, and a through hole communicated with the water jacket fluid is formed in the cylinder body; a turbocharger in fluid communication with the through bore; a water outlet chamber in fluid communication with the turbocharger and the cylinder head; the heat exchanger is communicated with the water outlet chamber and the water pump in a fluid mode, and the through hole is formed in the position, closest to the turbocharger, of the cylinder body; and the diameter of the through hole is 8mm-12 mm. The cooling path for cooling the turbocharger is simplified by the system, so that the cylinder body structure is simplified, the good cooling effect of the turbocharger can be guaranteed, and the system is economical.

Description

System and method for cooling engine and vehicle

Technical Field

The invention relates to the technical field of vehicle parts, in particular to a system and a method for cooling an engine and a vehicle.

Background

In a vehicle engine, a large amount of heat is generated due to a high-speed operation, and therefore, the engine needs to be cooled. In general, a plurality of complex water passages are cast in the cylinder block, and cooling water is used to cool the engine and its peripheral components and form a cooling circuit. The complex water channels formed by such casting not only complicate the cooling circuit and increase the casting cost of the cylinder block, but also increase the flow path of the cooling water to lower the cooling efficiency.

Disclosure of Invention

Technical problem to be solved

The first object of the present invention is: the system and the method for cooling the engine are simple in structure and good in cooling effect, and solve the problems that a cooling loop is complex, cooling efficiency is low, cylinder casting difficulty is high and manufacturing cost is high in the prior art.

The second object of the present invention is: the vehicle comprises a system for cooling the engine, which has a simple structure and a good cooling effect, and solves the problems of complex cooling circuit, low cooling efficiency, high cylinder casting difficulty and high manufacturing cost in the prior art.

(II) technical scheme

In order to solve the above technical problem, in one aspect, the present invention provides a system for cooling an engine, comprising: a water pump; the water pump comprises a cylinder body, wherein a cylinder cover is arranged above the cylinder body, a water jacket communicated with a water pump fluid is arranged in the cylinder body, and a through hole connected with the water jacket fluid is formed in the cylinder body; a turbocharger in fluid communication with the through bore; a water outlet chamber in fluid communication with the turbocharger and the cylinder head; the heat exchanger is communicated with the water outlet chamber and the water pump in a fluid mode, and the through hole is formed in the position, closest to the turbocharger, of the cylinder body; and the diameter of the through hole is 8mm-12 mm.

Preferably, the turbocharger is in fluid communication with the through bore via a first conduit.

Preferably, the water outlet chamber is in fluid communication with the turbocharger via a second conduit.

According to the scheme, when the turbocharger works, the system cools the turbocharger.

According to the scheme, when the turbocharger does not work, the system does not cool the turbocharger.

According to the above aspect, preferably, when the turbocharger is in operation, the cooling water from the water pump flows into the turbocharger through the water jacket, the through hole, and the first pipe to cool the turbocharger, and then flows from the turbocharger into the water chamber through the second pipe.

According to the above aspect, the cooling water from the water pump overflows into the cylinder head in the water jacket and then flows into the water chamber from the cylinder head.

According to the above scheme, the cooling water flowing into the water outlet chamber returns to the water pump again after being cooled by the heat exchanger, so as to realize the cooling circulation.

Another aspect of the invention provides a method of cooling an engine comprising cooling the engine using the system described above.

Yet another aspect of the invention provides a vehicle comprising the system described above.

(III) advantageous effects

The technical scheme of the invention has the following advantages:

one aspect of the present invention provides a system for cooling an engine, comprising: a water pump; the water pump comprises a cylinder body, wherein a cylinder cover is arranged above the cylinder body, a water jacket communicated with a water pump fluid is arranged in the cylinder body, and a through hole connected with the water jacket fluid is formed in the cylinder body; a turbocharger in fluid communication with the through bore; a water outlet chamber in fluid communication with the turbocharger and the cylinder head; the heat exchanger is communicated with the water outlet chamber and the water pump in a fluid mode, and the through hole is formed in the position, closest to the turbocharger, of the cylinder body; and the diameter of the through hole is 8mm-12 mm. Thus, the system according to the invention opens through holes with a diameter of 8mm-12mm from the first cylinder lower region of the cylinder block, and introduces the cooling water in the water jacket into the turbocharger directly through the first pipe to cool the turbocharger. The mode omits a plurality of unnecessary water channels, thereby simplifying the structure of the cylinder body, and the diameter of the through hole is smaller, so that the cylinder body can be formed by punching after casting and forming, thereby simplifying the casting model of the cylinder body compared with the water channel formed during casting, and further reducing the casting cost of the cylinder body. On the other hand, the system of the invention directly introduces the cooling water into the turbocharger when the turbocharger works, so that the process of cooling the oil by the cooling water through the oil cooler in the prior art is omitted, and the oil cooler is omitted in the system, thereby further simplifying the cylinder structure and the cooling loop, reducing the cooling energy loss and improving the cooling effect.

Drawings

FIG. 1 is a system for cooling an engine according to an embodiment of the present invention;

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

FIG. 3 is a view showing a cooling path formed by the cylinder block, the water jacket, the turbocharger, and the water outlet chamber according to the present invention;

FIG. 4 is a view showing a water jacket, a turbocharger, and a water outlet chamber forming a cooling path

In the figure: 10: a cylinder body; 20: a cylinder cover; 30: a turbocharger; 40: a water outlet chamber; 11: a water jacket; 11-1: a slot; 11-2: a first inlet; 22: a through hole; 10-1: a convex pipe; 110: a cylinder; 110-1: a first cylinder; 110-2: a second cylinder; 110-3: a third cylinder; 100: a first conduit; 200: a second conduit; 41: a second inlet; 42: and (7) an outlet.

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. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The turbocharger operates at high speed at engine start-up and generates high temperatures. In the prior art, when a turbocharger works, an electronic water pump does not work, and the turbocharger can only realize cooling through air cooling; when the turbocharger does not work, the turbocharger does not need oil lubrication any more, but loses air cooling after stopping, and cooling water in the water jacket needs to be pumped into the turbocharger through the electronic water pump so as to further cool the turbocharger. In such a cooling method for the turbocharger, since the cooling effect is poor when the turbocharger is operated, the turbocharger that is not operated needs to be further cooled by the electronic water pump when the turbocharger is stopped. And the cooling water is required to cool the lubricating oil through the oil cooler, so that the position of the oil cooler is required to be arranged on the cylinder body, and a plurality of water channels and oil channels which pass through the oil cooler are required to be cast on the cylinder body. Therefore, the cooling water from the water jacket to the turbocharger needs to pass through the oil cooler and the electronic water pump, the complexity of the cylinder body water supply channel is increased, the casting difficulty of the cylinder body is increased, the casting cost of the cylinder body is improved, and the cooling efficiency of the cooling water is reduced.

FIG. 1 is a system for cooling an engine according to an embodiment of the present invention, wherein a system for cooling an engine provided according to an embodiment of the present invention includes a water pump (not shown); a cylinder 10; the water pump comprises a cylinder body 10, wherein a cylinder cover 20 is arranged above the cylinder body 10, a water jacket 11 communicated with a water pump in a fluid mode is arranged in the cylinder body 10, and a through hole 22 connected with the water jacket 11 in the fluid mode is formed in the first cylinder of the cylinder body 10; a turbocharger 30 in fluid communication with the through bore 22; a water outlet chamber 40 in fluid communication with the turbocharger 30 and the cylinder head 20; and a heat exchanger (not shown) in fluid communication with the outlet chamber 40 and the water pump.

The water pump may provide power for the flow of cooling water in the engine cooling system and the engine. For example, the water pump may provide cooling water as a cooling source, pump the cooled cooling water into the water jacket 11 of the cylinder 10, and then flow along the path in the water jacket 11 to various water channels, water pipes and components to be cooled to achieve a cooling effect. On the other hand, the water pump may recover the cooled cooling water to provide the cooling water as a cooling source for the next cooling cycle. For example, the cooling water having the cooling effect is cooled by the heat exchanger, changed into cooling water that can be used as a cooling source again, and then recycled to the water pump for the next cooling cycle.

It is noted herein that fluid communication as described herein means that fluid can flow between two components, elements, etc., that is, fluid can flow from one of the elements to the other element, that two elements can be in direct communication such that fluid can flow from one of the elements directly to the other element, and that an intermediate element, such as a conduit, can exist between the two elements through which fluid can flow such that fluid can flow from one of the elements through the intermediate element to the other element.

FIG. 2 is a schematic view of a cylinder according to an embodiment of the present invention. Referring to fig. 2, the cylinder block 10 includes a plurality of cylindrical cylinders 110. In the embodiment shown in fig. 2, the cylinder block 10 includes three cylindrical cylinders 110. The present invention is not limited to the three cylinders shown. For convenience of description, a three-dimensional coordinate system shown in fig. 2 is defined, in which three cylinders are sequentially defined as a first cylinder 110-1, a second cylinder 110-2, and a third cylinder 110-3 in the-X direction. In addition, as can be seen in FIG. 2, the turbocharger 30 and the outlet chamber 40 are both located adjacent the first cylinder 110-1.

As can be seen from fig. 2, a water jacket 11 through which cooling water flows to cool the cylinder block 10 is provided inside the cylinder block 10. Specifically, for example, the water jacket 11 includes at least a slot 11-1 formed around the cylindrical outer surfaces of the three cylinders 110 and a first inlet 11-2 communicating with the water pump. Wherein the first inlet 11-2 is located at the position of the third cylinder 110-3 and opens in the Y-direction. A water pump is arranged in fluid communication with said first inlet 11-2. In this way, the cooling water from the water pump may flow into the water jacket 11 through the first inlet 11-2 and flow in the slot 11-1 of the water jacket 11, and the cylinder 110 may be cooled because the slot 11-1 surrounds the cylindrical outer surface of the cylinder 110.

Referring again to fig. 2, a through hole is opened in the cylinder block 10 in the vicinity of the closest distance from the turbocharger 30, that is, a through hole 22 is opened in the cylinder block 10 at the position of the first cylinder 110-1. The through-hole 22 may be formed in parallel to the first inlet 110-2 in the-Y direction. The through-hole 22 penetrates a side wall of the cylinder block 10 on the XZ plane and communicates with the slot 11-1 of the water jacket 11 formed outside the circumferential outer surface of the first cylinder 110-1, so that the cooling water in the slot 11-1 of the water jacket 11 can flow out of the cylinder block 10 through the through-hole 22, for example, into the turbocharger 30 through the first pipe 100 to cool the turbocharger 30.

Specifically, at the position of the through hole 22, a male pipe 10-1 for connecting and fixing the first pipe 100 is formed extending outward from the side wall of the cylinder body 10 in the XZ plane. The protruding pipe 10-1 has a hollow structure communicating with the through hole 22 to communicate with the through hole 22 and the water jacket 11. The boss 10-1 and the cylinder block 10 may be integrally formed, and in particular, the boss 10-1 may be integrally cast when the cylinder block 10 is cast. After entering the water jacket 11, the cooling water from the water pump flows out from the lower through hole 22 under its own weight, and flows into the turbocharger 30 through the convex pipe 10-1 and the first pipe 100 connected to the convex pipe 10-1 to cool the turbocharger 30. Since the through hole 22 directly communicates the water jacket 11 inside the cylinder block 10 with the outside of the cylinder block, that is, the water jacket 11 inside the cylinder block 10 and the turbocharger 30 are communicated through the first pipe 100. The cooling water directly enters the turbocharger 30 through the through-holes 22 to cool the turbocharger 30 when the turbocharger 30 is operated. Compared with the prior art, the cooling water cools the oil entering the turbocharger 30, on one hand, the direct cooling mode of the invention has higher cooling effect, and on the other hand, the water channels on the cylinder body are reduced, thereby simplifying the structure of the cylinder body. For the cylinder body provided with the complex water channel, the water channel is formed during the casting of the cylinder body, so that the casting process and the casting mold of the cylinder body can be simplified, the manufacturing process of the cylinder body is simplified, and the manufacturing cost of the cylinder body is reduced.

Wherein the diameter of the through hole 22 is 10mm or less. Preferably, the diameter of the through hole is 8mm or less. Since the through-hole has a small diameter, the through-hole 22 can be formed by a through-hole drilling operation after the cylinder block 10 is cast. Therefore, not only the path of the cooling water for cooling the turbocharger is shortened, but also a water passage for guiding the cooling water is not required to be formed on the cylinder block 10, as described above, and thus the casting process of the cylinder block can be simplified and the production cost of the cylinder block can be reduced.

FIG. 3 is a view showing a cooling path formed by the cylinder block, the water jacket, the turbocharger, and the water outlet chamber according to the present invention; fig. 4 is a view showing that the water jacket, the turbocharger, and the water outlet chamber form a cooling path, and arrows indicate a flow path of cooling water. Referring to fig. 3 and 4, one end of the first pipe 100 is connected and fixed to the cylinder block 10 from the boss pipe 10-1 on the outer wall of the cylinder block 10 communicating with the through hole 22 such that the first pipe 100 communicates with the hollow structure inside the boss pipe 10-1 and the through hole 22, thereby communicating with the water jacket 11. The other end of the first pipe 100 is connected and fixed to the turbocharger 30 so that the cooling water in the water jacket 11 can flow into the turbocharger through the through-hole 22, the boss pipe 10-1 and the first pipe 100 to cool the turbocharger. As can also be seen in fig. 3, the turbocharger 30 is also in fluid communication with the water outlet chamber 40 via a second conduit 200, such that cooling water that cools the turbocharger 30 flows into the water outlet chamber 40 via the second conduit 200.

The water flowing into and out of the water chamber 40 needs to be heat exchanged through the heat exchanger in the water circuit cycle to reprogram the cooler cooling water and be recycled back to the water pump for the next cooling cycle. Specifically, as shown in fig. 3 and 4, the water outlet chamber 40 includes a second inlet 41 and an outlet 42, and the cooling water flowing out of the cylinder head 20 and the second pipe 200 flows into the water outlet chamber 40 through the second inlet 41 and flows out of the water outlet chamber from the outlet 42.

In this manner, cooling water from the water pump enters the water jacket 11 through the first inlet 11-2 of the water jacket 11 and further enters the slot 11-1 of the water jacket 11. On the one hand, the cooling water introduced into the water jacket 11 continues to be introduced into the slots 11-1 in the water jacket 11, so that the cooling water in the slots 11-1 gradually increases and the water level gradually rises until it reaches the head 20 disposed above the cylinder block 10. A water passage through which cooling water flows is provided in the cylinder head 20, whereby the cooling water flowing into the cylinder head 20 gradually increases until it flows out through the cylinder head 20 into a water outlet chamber 40 that is in fluid communication with the cylinder head 20 to cool the cylinder head 40. Wherein the cooling water flowing into the water outlet chamber 40 is cooled by a heat exchanger (not shown) and is recovered to the water pump, thereby forming a cooling cycle. On the other hand, when the turbocharger is in operation, the cooling water introduced into the water jacket 11 flows out from the lower through hole 22 due to its own characteristics and the characteristics of the turbocharger 30 in operation, and flows into the turbocharger 30 through the boss pipe 10-1 and the first pipe 100 to directly cool the turbocharger 30 in operation. And after cooling the turbocharger 30, the cooling water flows into the outlet chamber 40 through the second pipe 200, and the cooling water flowing into the outlet chamber 40 is cooled by a heat exchanger (not shown) and is recovered to the water pump, thereby forming a cooling cycle, in the same manner as described above. When the turbocharger is not operating, the cooling water cannot enter the turbocharger 30 through the through-hole 22 and the first pipe 100, and therefore the turbocharger 30 is not cooled when the turbocharger is not operating. Since the cooling system of the present invention can directly cool the turbocharger 30 when the turbocharger 30 is operating, a good cooling effect is achieved, and thus, the temperature of the turbocharger 30 is not too high during operation and during non-operation of the turbocharger 30, and thus, the temperature of the turbocharger 30 can be prevented from being too high even if the turbocharger 30 is not cooled during non-operation of the turbocharger 30. Therefore, the cooling system according to the present invention simplifies the cooling path for cooling the turbocharger, thereby simplifying the cylinder structure, and at the same time, ensures a good cooling effect for the turbocharger 30, and is economical.

In another aspect, the present invention provides a method for cooling an engine using the system described above. The method comprises the following steps:

flowing cooling water from the first inlet 11-2 of the water jacket 11 into the slot 11-1 of the water jacket 11 by the water pump so that the cooling water flows around the outer surface of the cylinder 110 to carry heat on the outer surface of the cylinder 110 to cool the cylinder 110;

the cooling water flowing in the slots 11-1 gradually rises as the amount of the cooling water increases, on the one hand, until it overflows upward into the head 20 disposed above the cylinder block 10 to cool the head 20, and then flows out of the head 20 into the water outlet chamber 40; on the other hand, the property of the turbocharger 30 and the property of the cooling water flowing in the slot 11-1 during operation flow into the turbocharger 30 from the through hole 22 and through the convex tube 10-1 and the first pipe 100 to cool the turbocharger 30, and the cooling water after cooling the turbocharger 30 flows into the water chamber 40 through the second pipe 200;

the cooling water flowing into the water outlet chamber 40 exchanges heat through the heat exchanger in the water circuit cycle, i.e., cools down to re-form cold cooling water, and then is recycled to the water pump for the next cooling cycle.

Another aspect of the present invention also provides a vehicle including the above system for cooling an engine.

In summary, the present invention provides a system for cooling an engine, comprising: a water pump; the water pump comprises a cylinder body, wherein a cylinder cover is arranged above the cylinder body, a water jacket communicated with a water pump fluid is arranged in the cylinder body, and a through hole connected with the water jacket fluid is formed in the cylinder body; a turbocharger in fluid communication with the through bore; a water outlet chamber in fluid communication with the turbocharger and the cylinder head; and a heat exchanger in fluid communication with the water outlet chamber and the water pump, wherein the through hole opens in the vicinity of the cylinder block closest to the turbocharger, and the diameter of the through hole is 8mm to 12mm, preferably 10 mm. Thus, the system according to the invention opens a through-hole with a diameter of 10mm from the first cylinder lower region of the cylinder block, and the cooling water in the water jacket of the first pipe is directly introduced into the turbocharger to cool the turbocharger. The mode omits a plurality of unnecessary water channels, thereby simplifying the structure of the cylinder body, and the diameter of the through hole is smaller, so that the cylinder body can be formed by punching after casting and forming, thereby simplifying the casting model of the cylinder body compared with the water channel formed during casting, and further reducing the casting cost of the cylinder body. On the other hand, the system of the invention directly introduces the cooling water into the turbocharger when the turbocharger works, so that the process of cooling the oil by the cooling water through the oil cooler in the prior art is omitted, and the oil cooler is omitted in the system, thereby further simplifying the cylinder structure and the cooling loop, reducing the cooling energy loss and improving the cooling effect.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A system for cooling an engine, comprising:

a water pump;

the water pump comprises a cylinder body, a cylinder cover is arranged above the cylinder body, a water jacket communicated with the water pump in a fluid mode is arranged in the cylinder body, and a through hole communicated with the water jacket in the fluid mode is formed in the cylinder body;

a turbocharger in fluid communication with the through bore;

a water outlet chamber in fluid communication with the turbocharger and the cylinder head; and

a heat exchanger in fluid communication with the outlet chamber and the water pump,

wherein the through hole is opened at a position of a cylinder of the cylinder block closest to the turbocharger; and the diameter of the through hole is 8mm-12 mm.

2. The system of claim 1, wherein the turbocharger is in fluid communication with the throughbore via a first conduit.

3. The system of claim 1, wherein the outlet chamber is in fluid communication with the turbocharger via a second conduit.

4. The system of claim 1, wherein the system cools the turbocharger while the turbocharger is operating.

5. The system of claim 1, wherein the system does not cool the turbocharger when the turbocharger is not operating.

6. The system of claim 4, wherein when the turbocharger is operating, cooling water from the water pump flows into the turbocharger through the water jacket, the through-hole, and the first conduit to cool the turbocharger and then flows from the turbocharger through the second conduit into the water outlet chamber.

7. The system of claim 1, wherein cooling water from the water pump overflows up the water jacket into the cylinder head and then flows from the cylinder head into the outlet chamber.

8. The system of claim 6 or 7, wherein the cooling water flowing into the water outlet chamber is returned to the water pump again after being cooled by the heat exchanger, thereby realizing a cooling cycle.

9. A method of cooling an engine comprising employing a system according to any one of claims 1 to 8 to cool the engine.

10. A vehicle, characterized in that it comprises a system according to any one of claims 1-8.