A small-circulation water cooling system for an engine

Abstract

The present invention provides an engine small-circulation water cooling system, which belongs to the technical field of engines. It solves the problem that the existing engine water cooling system has poor cooling effect. The engine includes a cylinder body, and the small-circulation water cooling system includes a case water jacket, a cylinder head water jacket, a water inlet water jacket, a water outlet water jacket and a plurality of connecting water jackets located in the cylinder body. The case water jacket and the cylinder head water jacket are connected through connecting water jackets arranged at intervals. The case water jacket is in a flat ring shape, the water inlet water jacket is located in the middle of one side of the case water jacket, and the water outlet water jacket is connected to the center of the cylinder head water jacket. The engine small-circulation water cooling system has the advantage of good cooling effect.

Description

Technical Field

[0001] The invention belongs to the technical field of engines and relates to a small-circulation water cooling system for an engine. Background Art

[0002] The main function of the automobile engine cooling system is to dissipate part of the heat absorbed by the heated parts in time to ensure that the engine works at the most suitable temperature. The automobile engine cooling system uses water as the cooling medium, including a small circulation water cooling system and a large circulation water cooling system.

[0003] Existing small-circulation water cooling systems, for example, Chinese patent literature discloses an engine small-circulation cooling system [application number: 201720169132.6; authorization announcement number: CN206707840U], which includes an engine cylinder cooling water jacket, a small-circulation water outlet pipeline, a cylinder water cooling circulation water inlet and a thermostat, one end of the small-circulation water outlet pipeline is connected to the engine cylinder cooling water jacket near the cylinder water cooling circulation water inlet, the other end of the small-circulation water outlet pipeline is connected to the thermostat, and the small-circulation water outlet is arranged on the cooling water jacket around the first cylinder hole of the cylinder.

[0004] The small circulation cooling system of this structure shortens the small circulation water circuit and makes the water jacket layout compact. However, in the small circulation cooling system of this structure, the cylinder cooling water jacket surrounds the cylinder bore of the cylinder body, and the water inlet and the water outlet pipe are both connected to the side of the cylinder cooling water jacket. The water inlet is located at one end of the cylinder cooling water jacket, which makes the cooling water enter from the water inlet and circulate around the cylinder cooling water jacket for one cycle before flowing out from the water outlet pipe, that is, the cooling water passes through different cylinder bores in turn, and the temperature of the cooling water that just enters the cylinder cooling water jacket is the lowest. After passing through the first cylinder bore, the temperature of the cooling water rises due to heat exchange, and the temperature of the cooling water rises again after passing through the second cylinder bore, that is, the temperature of the cooling water passing through different cylinder bores is different, which leads to a certain difference in the temperature of the cylinder body at different cylinder bores, a high temperature difference, and a poor cooling effect. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art and to propose an engine small-circulation water cooling system, the technical problem to be solved is how to improve the cooling effect of the engine.

[0006] The object of the present invention can be achieved through the following technical solutions: an engine small-circulation water cooling system, the engine includes a cylinder block, the small-circulation water cooling system includes a case water jacket, a cylinder head water jacket, a water inlet water jacket, a water outlet water jacket and a plurality of connecting water jackets located in the cylinder block, characterized in that the case water jacket and the cylinder head water jacket are connected through the connecting water jackets arranged at intervals, the case water jacket is in a flat ring shape, the water inlet water jacket is located in the middle of one side of the case water jacket, and the water outlet water jacket is connected to the center of the cylinder head water jacket.

[0007] The casing water jacket is flat and annular, and the water inlet jacket is located in the middle of one side of the casing water jacket. The cooling water enters the casing water jacket from the water inlet jacket, and then flows in a semi-circular shape along the casing water jacket. The cooling water in the casing water jacket enters the cylinder head water jacket through the connecting jacket. The connecting jacket is set so that when the cooling water in the casing water jacket enters the cylinder head water jacket, the amount of cooling water at each edge of the cylinder head water jacket is as consistent as possible. The center of the cylinder head water jacket is connected with the water outlet jacket, so that the cooling water in the cylinder head water jacket flows from the edge to the center, and finally flows out from the water outlet jacket. The water inlet jacket is located in the middle of one side of the casing water jacket, and the center of the cylinder head water jacket is connected with the water outlet jacket, so that the flow rate and flow direction of the cooling water in the small circulation water cooling system are relatively symmetrical, the cooling water flow stroke is short, the cooling water cools the cylinder and the combustion chamber more evenly, so that the temperature difference between each part of the cylinder and the combustion chamber is small, the cooling effect of the engine is improved, the engine is balanced and stable when working, and the performance of the engine is improved.

[0008] In the above-mentioned engine small-circulation water cooling system, the cylinder head water jacket includes an annular outer water jacket and an inner water jacket located inside the outer water jacket, the outer water jacket is partially arranged along the casing water jacket and the outer water jacket is connected to the casing water jacket through a connecting water jacket, and the center of the inner water jacket is connected to the water outlet water jacket. The flat annular casing water jacket and the annular outer water jacket are designed to match the structure of the combustion chamber and play a role in better and uniformly cooling the combustion chamber; this structure of the cylinder head water jacket ensures that the cooling water flows from the edge to the center, making the cooling water flow as consistent as possible, making the cooling effect of the cooling water as uniform as possible, and improving the cooling effect of the engine.

[0009] In the above-mentioned engine small-circulation water cooling system, the case water jacket is symmetrically arranged with the center of the cylinder head water jacket as the center, the cylinder head water jacket is symmetrically arranged with the center of the cylinder head water jacket as the center, and all the connecting water jackets are symmetrically arranged with the center of the cylinder head water jacket as the center. The flow rate and flow direction of the cooling water in the case water jacket, the cylinder head water jacket and the connecting water jacket are as symmetrical as possible, which has a better cooling effect, reduces the temperature difference between various parts of the cylinder body and the combustion chamber, improves the cooling effect of the engine, makes the engine balanced and stable when working, and improves the performance of the engine.

[0010] In the above-mentioned engine small-circulation water cooling system, the cylinder body has an exhaust hole, and the water inlet jacket and the water outlet jacket both extend to the exhaust hole. The temperature of the gas discharged from the exhaust hole is relatively high, so that the temperature of the cylinder body at the exhaust hole is relatively high. The water inlet jacket and the water outlet jacket both extend to the exhaust hole to cool the exhaust hole, so that the temperature of each part of the cylinder body is as uniform as possible, thereby improving the cooling effect of the engine.

[0011] In the above-mentioned engine small-circulation water cooling system, the cylinder body has a plurality of cylinder holes, and the water jacket of the housing is concavely arranged and embedded between two adjacent cylinder holes, so as to reasonably utilize the space, increase the cooling area, and improve the cooling effect of the engine.

[0012] In the above-mentioned engine small-circulation water cooling system, the water inlet jacket includes a first branch water jacket and a second branch water jacket, the housing water jacket includes a section of annular water jacket in the shape of an open ring, the annular water jacket is embedded between two adjacent cylinder holes, and the first branch water jacket and the second branch water jacket are respectively connected to the two ends of the annular water jacket opening. The water inlet jacket is divided into a first branch water jacket and a second branch water jacket, and an annular water jacket is arranged between the first branch water jacket and the second branch water jacket, so that the cooling water can flow better to both sides, improve the stability of the cooling water flow rate and flow direction, thereby improving the cooling effect of the cooling water; at the same time, the annular water jacket is arranged to form an avoidance space, so that the shaft or other components inside the engine can be passed through, the space is reasonably used, the various components are arranged reasonably, and the engine structure is compact.

[0013] In the above-mentioned engine small-circulation water cooling system, the outlet water jacket has an escape channel, the outlet water jacket is divided into two parts at the escape channel, and the two separated parts are symmetrically arranged, and the escape channel is arranged opposite to the cavity inside the annular water jacket. The escape channel is used in conjunction with the annular water jacket so that the shaft or other parts inside the engine can be passed through, the space is reasonably used, the parts are reasonably arranged, and the engine structure is compact.

[0014] In the above-mentioned engine small-circulation water cooling system, a balance shaft is passed through the cylinder body, a water pump is provided on the side of the cylinder body, the balance shaft is connected to the water pump and the balance shaft can drive the water pump to rotate, the water outlet of the water pump is connected to the water inlet jacket, and the water inlet of the water pump is connected to the water outlet jacket. The water pump realizes the circulation of cooling water, and the water pump is directly driven to work by the balance shaft inside the engine, with high transmission efficiency and reliable stability.

[0015] In the above-mentioned engine small-circulation water cooling system, the sum of the depths of the cylinder head water jacket, the connecting water jacket and the tank water jacket is between 30-50 mm. The water jacket depth of the small-circulation water cooling system is relatively low, which is conducive to idling warm-up and emission.

[0016] In the above-mentioned engine small-circulation water cooling system, the depth of the box water jacket is greater than the depth of the cylinder head water jacket. This structure can better guide the flow of cooling water and improve the cooling effect of the engine.

[0017] Compared with the prior art, the engine small-circulation water cooling system provided by the present invention has the following advantages:

[0018] 1. The water jacket arrangement of this small-circulation water cooling system makes the flow rate and flow direction of the cooling water more symmetrical, and the cooling effect of the cooling water on each part of each cylinder hole is more consistent, so that the temperature difference at each cylinder hole is small, the cooling of the combustion chamber is good, the cooling effect of the engine is improved, the engine works evenly and stably, and the performance of the engine is improved.

[0019] 2. The water jacket of this small-circulation water cooling system makes reasonable use of space when arranged, occupies a small space and has a compact structure; at the same time, the depth of the water jacket is shallow, which is conducive to idling warm-up and discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the overall layout of the water jacket of the engine's small circulation water cooling system Figure 1 .

[0021] Figure 2 This is the overall layout of the water jacket of the engine's small circulation water cooling system Figure 2 .

[0022] Figure 3 It is a structural schematic diagram of the cylinder block of the small-circulation water-cooling system of this engine.

[0023] Figure 4 It is a schematic diagram of the structure of the water jacket of the small-circulation water cooling system of the engine.

[0024] Figure 5 It is a structural schematic diagram of the engine's small-circulation water cooling system connected to the water jacket.

[0025] Figure 6 This is the engine's small cycle water cooling system Figure 5 Section view along AA direction.

[0026] In the figure, 1, cylinder block; 2, case water jacket; 21, annular water jacket; 3, cylinder head water jacket; 31, external water jacket; 32, internal water jacket; 4, water inlet water jacket; 41, first branch water jacket; 42, second branch water jacket; 5, water outlet water jacket; 6, connecting water jacket; 7, exhaust hole; 8, cylinder hole; 9, avoidance channel; 10, balance shaft; 11, water pump. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, the engine includes a cylinder block 1, a balance shaft 10 and a water pump 11. The small circulation water cooling system is located in the cylinder block 1, and the small circulation water cooling system includes a box water jacket 2, a cylinder head water jacket 3, a water inlet water jacket 4, a water outlet water jacket 5 and a connecting water jacket 6.

[0029] The balancing shaft 10 is passed through the cylinder body 1, and the water pump 11 is fixedly connected to the side of the cylinder body 1. The balancing shaft 10 is connected to the water pump 11 and the balancing shaft 10 can drive the water pump 11 to rotate. The water outlet of the water pump 11 is connected to the water inlet jacket 4, and the water inlet of the water pump 11 is connected to the water outlet jacket 5.

[0030] like Figure 5 As shown, in this embodiment, the case water jacket 2 and the cylinder head water jacket 3 are connected through eleven spaced connecting water jackets 6. In actual production, the number of connecting water jackets 6 can be eight or fourteen. The cylinder head water jacket 3 includes an annular outer water jacket 31 and an inner water jacket 32 ​​located inside the outer water jacket 31. The outer water jacket 31 is partially arranged along the case water jacket 2 and the outer water jacket 31 is connected to the case water jacket 2 through the connecting water jacket 6. The center of the inner water jacket 32 ​​is connected to the water outlet water jacket 5. The case water jacket 2 is symmetrically arranged with the center of the cylinder head water jacket 3 as the center, the cylinder head water jacket 3 is symmetrically arranged with the center of the cylinder head water jacket 3 as the center, and all the connecting water jackets 6 are symmetrically arranged with the center of the cylinder head water jacket 3 as the center. The depth of the case water jacket 2 is greater than the depth of the cylinder head water jacket 3. In this embodiment, the sum of the depths of the cylinder head water jacket 3, the connecting water jacket 6 and the case water jacket 2 is 40 mm. In actual production, the sum of the depths of the cylinder head water jacket 3, the connecting water jacket 6 and the case water jacket 2 can be 30 mm or 50 mm.

[0031] like Figure 4 As shown, the casing water jacket 2 is in the shape of a flat ring, and the water inlet jacket 4 is located in the middle of one side of the casing water jacket 2. In this embodiment, the cylinder body 1 has two cylinder holes 8, and the casing water jacket 2 is partially concavely arranged and embedded between two adjacent cylinder holes 8. The water inlet jacket 4 includes a first branch water jacket 41 and a second branch water jacket 42. The casing water jacket 2 includes a section of an open ring-shaped annular water jacket 21, and the annular water jacket 21 is embedded between two adjacent cylinder holes 8. The first branch water jacket 41 and the second branch water jacket 42 are respectively connected to the two ends of the opening of the annular water jacket 21. In actual production, the number of cylinder holes 8 can be three or four. Figure 6 As shown, the water outlet jacket 5 is connected with the center of the cylinder head water jacket 3, and an avoidance channel 9 is provided in the water outlet jacket 5. The water outlet jacket 5 is divided into two parts at the avoidance channel 9 and the two separated parts are symmetrically arranged. The avoidance channel 9 is arranged opposite to the cavity inside the annular water jacket 21.

[0032] An exhaust hole 7 is provided in the cylinder body 1 , and the water inlet water jacket 4 and the water outlet water jacket 5 both extend to the exhaust hole 7 . In this embodiment, there are two exhaust holes 7 , and the water inlet water jacket 4 and the water outlet water jacket 5 are located between the two exhaust holes 7 .

[0033] During operation, the balance shaft 10 drives the water pump 11 to rotate, and the water pump 11 delivers cooling water into the case water jacket 2 through the water inlet jacket 4, and then the cooling water enters the edge of the cylinder head water jacket 3 through the connecting water jacket 6, and the cooling water then flows from the edge of the cylinder head water jacket 3 to the water outlet at the center of the cylinder head water jacket 3, and then flows to the water pump 11 through the water outlet jacket 5, realizing small circulation flow cooling of the cooling water.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although the terms such as cylinder block 1, housing water jacket 2, annular water jacket 21, cylinder head water jacket 3, external water jacket 31, internal water jacket 32, water inlet water jacket 4, first branch water jacket 41, second branch water jacket 42, water outlet water jacket 5, connecting water jacket 6, exhaust hole 7, cylinder hole 8, avoidance channel 9, balance shaft 10, water pump 11 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An engine small-circulation water cooling system, the engine comprising a cylinder block (1), the small-circulation water cooling system comprising a case water jacket (2), a cylinder head water jacket (3), a water inlet water jacket (4), a water outlet water jacket (5) and a plurality of connecting water jackets (6) located in the cylinder block (1), characterized in that The housing water jacket (2) and the cylinder head water jacket (3) are connected via the spaced-apart connecting water jacket (6); the housing water jacket (2) is in the shape of a flat ring; the water inlet water jacket (4) is located in the middle of one side of the housing water jacket (2); the water outlet water jacket (5) is connected to the center of the cylinder head water jacket (3); the cylinder body (1) has an exhaust hole (7); the water inlet water jacket (4) and the water outlet water jacket (5) both extend to the exhaust hole (7); the water inlet water jacket (4) includes a first branch water jacket (41) and a second branch water jacket (42); The housing water jacket (2) comprises a section of annular water jacket (21) in the form of an open ring. The annular water jacket (21) is embedded between two adjacent cylinder holes (8). The first branch water jacket (41) and the second branch water jacket (42) are respectively connected to two ends of the opening of the annular water jacket (21). The outlet water jacket (5) has an escape channel (9). The outlet water jacket (5) is divided into two parts at the escape channel (9). The two parts are symmetrically arranged. The escape channel (9) is arranged opposite to the cavity inside the annular water jacket (21).

2. The engine small-circulation water cooling system according to claim 1, characterized in that: The cylinder head water jacket (3) comprises an annular outer water jacket (31) and an inner water jacket (32) located inside the outer water jacket (31); the outer water jacket (31) is partially arranged along the casing water jacket (2) and the outer water jacket (31) is connected to the casing water jacket (2) via a connecting water jacket (6); the center of the inner water jacket (32) is connected to the water outlet water jacket (5).

3. The engine small-circulation water cooling system according to claim 1, characterized in that: The housing water jacket (2) is disposed symmetrically with the center of the cylinder head water jacket (3) as the center, the cylinder head water jacket (3) is disposed symmetrically with the center of the cylinder head water jacket (3) as the center, and all the connecting water jackets (6) are disposed symmetrically with the center of the cylinder head water jacket (3) as the center.

4. An engine small-circulation water cooling system according to claim 1, 2 or 3, characterized in that: The cylinder body (1) has a plurality of cylinder holes (8), and the water jacket (2) of the housing is partially concavely arranged and embedded between two adjacent cylinder holes (8).

5. An engine small-circulation water cooling system according to claim 1, 2 or 3, characterized in that: A balancing shaft (10) is passed through the cylinder body (1), a water pump (11) is provided on the side of the cylinder body (1), the balancing shaft (10) is connected to the water pump (11) and the balancing shaft (10) can drive the water pump (11) to rotate, a water outlet of the water pump (11) is connected to a water inlet jacket (4), and a water inlet of the water pump (11) is connected to a water outlet jacket (5).

6. An engine small-circulation water cooling system according to claim 1, 2 or 3, characterized in that: The sum of the depths of the cylinder head water jacket (3), the connecting water jacket (6) and the tank water jacket (2) is between 30 mm and 50 mm.

7. An engine small-circulation water cooling system according to claim 1, 2 or 3, characterized in that: The depth of the tank water jacket (2) is greater than the depth of the cylinder head water jacket (3).

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