CN107956590B - Engine cooling system and cooling method thereof - Google Patents
Engine cooling system and cooling method thereof Download PDFInfo
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- CN107956590B CN107956590B CN201711216908.6A CN201711216908A CN107956590B CN 107956590 B CN107956590 B CN 107956590B CN 201711216908 A CN201711216908 A CN 201711216908A CN 107956590 B CN107956590 B CN 107956590B
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- water
- collecting cavity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The cooling method of the system is that the cooling liquid flows into the cylinder head water jacket from the first water collecting cavity to cool the cylinder head, then flows into the second water collecting cavity to be split, one part flows to the radiator through the third water collecting cavity, and the other part flows into the radiator through the split outlet. The design ensures that the high heat load area of the cylinder cover and the cylinder body is effectively cooled, and simultaneously improves the heat efficiency and the economy of the engine.
Description
Technical Field
The invention belongs to the technical field of automobile engines, and particularly relates to an engine cooling system and a cooling method thereof, which are suitable for improving the heat efficiency and the economy of an engine and ensuring the effective cooling of a high heat load area of a cylinder.
Background
As an important component of an automobile engine, an engine cooling system generally adopts a bottom-up cooling mode, namely, cooling liquid firstly flows into a cylinder head water jacket through a cylinder head, then flows into a radiator through a total water outlet of the engine. Since the coolant preferentially cools the cylinder block, the cooling capacity of the nose bridge region of the cylinder head is weak. Aiming at the problems, chinese patent: the invention patent with application publication number of CN106988851A and application publication date of 2017, 7 and 28 discloses a reverse surrounding type cooling structure and a cooling mode of an engine, wherein cooling liquid is firstly sent into a cylinder body to perform primary cooling, then flows into a cylinder cover from the cylinder body, passes through the upper part of a nose bridge area, then flows back into the cylinder body from the cooling liquid flowing through the cylinder cover, flows in the cylinder body and finally is discharged out of the engine. Although this system is capable of preferentially cooling a high temperature region of an engine, the cooling heat dissipation is good, but the following drawbacks still exist:
1. the cooling strength required by the cylinder cover is far higher than that of the cylinder body, and the cooling structure ensures that all cooling liquid for cooling the cylinder cover enters the cylinder body, so that on one hand, under the condition of ensuring the cooling of the cylinder cover, the cylinder body is excessively strong in cooling and takes away excessive heat, thereby influencing the heat efficiency, and on the other hand, the excessive cooling liquid enters the cylinder body to cause the excessively high flow rate in the water jacket of the cylinder body, the flow resistance is excessively high, the power consumption of a water pump is increased, and the economy of an engine is influenced;
2. in the above structure, the connecting holes of the water collecting cavities on both sides of the cylinder liner are arranged at the bottom of the cylinder liner, and the arrangement mode can guide the coolant to flow to the bottom of the cylinder liner, so that the cooling strength of the bottom of the cylinder liner is higher than that of the top of the cylinder liner, and in fact, the heat load of the top of the cylinder liner is far higher than that of the bottom, therefore, the high heat load area of the cylinder liner cannot be effectively cooled.
Disclosure of Invention
The invention aims to solve the problems that the heat efficiency and the engine economy are poor and a high heat load area of a cylinder cannot be effectively cooled in the prior art, and provides an engine cooling system and a cooling method thereof, wherein the heat efficiency and the engine economy can be improved, and the high heat load area of the cylinder can be effectively cooled.
In order to achieve the above object, the technical scheme of the present invention is as follows:
an engine cooling system comprises a cylinder cover and a cylinder body, wherein a cylinder cover water jacket is arranged in the cylinder cover, and a first water collecting cavity, a second water collecting cavity and a third water collecting cavity are arranged on the outer side of the cylinder body;
the first water collecting cavity is communicated with the third water collecting cavity sequentially through the cylinder cover water jacket and the second water collecting cavity, and a split outlet communicated with the radiator is formed in the second water collecting cavity.
The second water collecting cavity and the third water collecting cavity are respectively positioned on two sides of the top of the cylinder body, the second water collecting cavity is communicated with the third water collecting cavity sequentially through a first connecting channel, a cylinder jacket water jacket and a second connecting channel, the first connecting channel and the second connecting channel are all arranged near the top of the cylinder jacket water jacket, and the second water collecting cavity and the third water collecting cavity are higher than the cylinder jacket water jacket.
The cylinder head water jacket comprises an upper water jacket layer and a lower water jacket layer, a water inlet of the upper water jacket layer is communicated with the first water collecting cavity through a third water flow channel, and a water outlet of the upper water jacket layer is communicated with the second water collecting cavity through a fourth water flow channel, a lower water jacket layer and a first water flow channel in sequence.
And a water outlet of the lower water jacket is communicated with the third water collecting cavity through a second water flow channel.
The first water collecting cavity is located below the second water collecting cavity or the third water collecting cavity, the diversion outlet is located on the side face or the end face of the second water collecting cavity, the first water flow channel is a main water flow channel and is arranged near the exhaust side, the cross section area of the first water flow channel is larger than that of the second water flow channel, and the fourth water flow channel is arranged near the mounting hole of the cylinder cover fuel injector and the exhaust valve.
When the total number of the air cylinders is greater than 1, the number of the third water flow channels is the total number of the air cylinders minus one and is positioned between two adjacent air cylinders, the number of the lower water jackets is the total number of the air cylinders, and the air cylinders of the lower water jackets are independently arranged.
A method of cooling an engine cooling system, comprising the steps of, in order:
1. firstly, cooling liquid is sent into a first water collecting cavity, and then the cooling liquid flows into a water jacket of the cylinder cover from the first water collecting cavity to cool the cylinder cover;
2. after the cylinder cover is cooled, cooling liquid flows into the second water collecting cavity through the water outlet of the water jacket of the cylinder cover, then is split, one part flows to the radiator through the third water collecting cavity, and the other part enters the radiator through the split outlet.
The cylinder head water jacket comprises an upper water jacket layer and a lower water jacket layer, a water inlet of the upper water jacket layer is communicated with the first water collecting cavity through a third water flow channel, and a water outlet of the upper water jacket layer is communicated with the third water collecting cavity through a fourth water flow channel, the lower water jacket layer, a first water flow channel, the second water collecting cavity and the cylinder jacket layer;
in the first step, the cooling liquid flowing out of the first water collecting cavity flows into the lower water jacket through the third water flow channel, the upper water jacket and the fourth water flow channel in sequence;
in the second step, the cooling liquid flowing out of the lower water jacket sequentially passes through the first water flow channel, the second water collecting cavity and the cylinder jacket water jacket and enters the third water collecting cavity.
The water outlet of the lower water jacket is communicated with a third water collecting cavity through a second water flow channel;
in the second step, a part of cooling liquid in the lower water jacket flows into the third water collecting cavity through the first water flow channel, the second water collecting cavity and the cylinder jacket water jacket in sequence, and the other part directly enters the third water collecting cavity through the second water flow channel.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the engine cooling system, the second water collecting cavity is provided with the split flow outlet communicated with the radiator, cooling liquid can be split after entering the second water collecting cavity, one part of cooling liquid flows to the radiator through the third water collecting cavity, and the other part of cooling liquid directly enters the radiator through the split flow outlet. Thus, the present invention improves thermal efficiency and economy of the engine.
2. According to the engine cooling system, the second water collecting cavity and the third water collecting cavity are respectively arranged on two sides of the top of the cylinder block, and the first connecting channel and the second connecting channel are arranged near the top of the cylinder sleeve water jacket. Thus, the present invention enhances cooling of the high thermal load region of the cylinder.
3. According to the engine cooling system, the number of water flow channels between the first water collecting cavity and the upper water jacket of the cylinder cover is one less than the total number of cylinders and is positioned between two adjacent cylinders, the arrangement can realize flow division, reduce flow resistance and ensure cooling uniformity of each cylinder. Therefore, the invention ensures the cooling uniformity, stability and independence of each cylinder.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view A-A of fig. 1.
Fig. 3 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure: the cylinder head 1, the cylinder head water jacket 11, the upper water jacket 111, the lower water jacket 112, the cylinder block 2, the first water collecting cavity 21, the second water collecting cavity 22, the split outlet 221, the third water collecting cavity 23, the cylinder jacket 24, the first water flow channel 3, the second water flow channel 4, the third water flow channel 5, the fourth water flow channel 6, the first connecting channel 7 and the second connecting channel 8;
the direction indicated by the arrow is the flow direction of the cooling liquid.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 4, an engine cooling system comprises a cylinder head 1 and a cylinder block 2, wherein a cylinder head water jacket 11 is arranged in the cylinder head 1, and a first water collecting cavity 21, a second water collecting cavity 22 and a third water collecting cavity 23 are arranged on the outer side of the cylinder block 2;
the first water collecting cavity 21 is communicated with the third water collecting cavity 23 sequentially through the cylinder cover water jacket 11 and the second water collecting cavity 22, and a split outlet 221 communicated with the radiator is formed in the second water collecting cavity 22.
The second water collecting cavity 22 and the third water collecting cavity 23 are respectively located at two sides of the top of the cylinder block 2, the second water collecting cavity 22 is communicated with the third water collecting cavity 23 sequentially through a first connecting channel 7, a cylinder liner water jacket 24 and a second connecting channel 8, the first connecting channel 7 and the second connecting channel 8 are both arranged near the top of the cylinder liner water jacket 24, and the second water collecting cavity 22 and the third water collecting cavity 23 are higher than the cylinder liner water jacket 24 in height.
The cylinder head water jacket 11 comprises an upper water jacket 111 and a lower water jacket 112, a water inlet of the upper water jacket 111 is communicated with the first water collecting cavity 21 through a third water flow channel 5, and a water outlet of the upper water jacket 111 is communicated with the second water collecting cavity 22 through a fourth water flow channel 6, a lower water jacket 112 and a first water flow channel 3 in sequence.
The water outlet of the lower water jacket 112 is communicated with the third water collecting cavity 23 through the second water flow channel 4.
The first water collecting cavity 21 is located below the second water collecting cavity 22 or the third water collecting cavity 23, the split outlet 221 is located on the side face or the end face of the second water collecting cavity 22, the first water flow channel 3 is a main water flow channel and is arranged on the near exhaust side, the cross section area of the first water flow channel 3 is larger than that of the second water flow channel 4, and the fourth water flow channel 6 is arranged near the cylinder head fuel injector mounting hole and the exhaust valve.
When the total number of the cylinders is greater than 1, the number of the third water flow channels 5 is one less than the total number of the cylinders and is positioned between two adjacent cylinders, the number of the lower water jackets 112 is the total number of the cylinders, and the cylinders of the lower water jackets 112 are independently arranged.
A method of cooling an engine cooling system, comprising the steps of, in order:
1. firstly, cooling liquid is fed into a first water collecting cavity 21, and then the cooling liquid flows into a cylinder head water jacket 11 from the first water collecting cavity 21 to cool the cylinder head 1;
2. after the cylinder head 1 is cooled, the cooling liquid flows into the second water collecting cavity 22 through the water outlet of the cylinder head water jacket 11, then is split, one part flows to the radiator through the third water collecting cavity 23, and the other part enters the radiator through the split outlet 221.
The cylinder head water jacket 11 comprises an upper water jacket 111 and a lower water jacket 112, wherein a water inlet of the upper water jacket 111 is communicated with the first water collecting cavity 21 through a third water flow channel 5, and a water outlet of the upper water jacket 111 is communicated with the third water collecting cavity 23 through a fourth water flow channel 6, a lower water jacket 112, a first water flow channel 3, a second water collecting cavity 22 and a cylinder sleeve water jacket 24;
in the first step, the cooling liquid flowing out of the first water collecting cavity 21 flows into the lower water jacket 112 through the third water flow channel 5, the upper water jacket 111 and the fourth water flow channel 6 in sequence;
in the second step, the cooling liquid flowing out of the lower water jacket 112 sequentially passes through the first water flow channel 3, the second water collecting cavity 22 and the cylinder jacket 24 to enter the third water collecting cavity 23.
The water outlet of the lower water jacket 112 is communicated with the third water collecting cavity 23 through a second water flow channel 4;
in the second step, a part of the cooling liquid in the lower water jacket 112 flows into the third water collecting cavity 23 through the first water flow channel 3, the second water collecting cavity 22 and the cylinder jacket 24 in sequence, and the other part directly enters the third water collecting cavity 23 through the second water flow channel 4.
The principle of the invention is explained as follows:
first water collection chamber 21: according to the invention, the first water collecting cavity 21 is arranged below the second water collecting cavity 22 or the third water collecting cavity 23, so that the problem of overlarge width of the engine caused by the arrangement of the first water collecting cavity outside the second water collecting cavity 22 or the third water collecting cavity 23 can be avoided.
In the present invention, the number of the first water flow channel 3, the second water flow channel 4 and the fourth water flow channel 6 may be plural. The number of the upper water jacket 111, the first water collecting chamber 21, the second water collecting chamber 22, and the third water collecting chamber 23 is 1 in consideration of the production manufacturability and the flow stability.
Example 1:
referring to fig. 1 to 3, an engine cooling system comprises a cylinder head 1 and a cylinder block 2, a cylinder head water jacket 11 in the cylinder head 1 comprises an upper water jacket 111 and a lower water jacket 112, a first water collecting cavity 21, a second water collecting cavity 22 and a third water collecting cavity 23 are arranged on the outer side of the cylinder block 2, a cylinder liner water jacket 24 is arranged in the cylinder block 2, the number of the lower water jackets 112 is the total number of cylinders, the cylinders of the lower water jackets 112 are independently arranged, the first water collecting cavity 21 is positioned below the second water collecting cavity 22, the second water collecting cavity 22 and the third water collecting cavity 23 are respectively positioned on two sides of the top of the cylinder block 2, the tops of the second water collecting cavity 22 and the third water collecting cavity 23 are positioned on the same horizontal plane, the first water collecting cavity 7 and the second water collecting cavity 22 are communicated with the third water collecting cavity 23 sequentially through a first connecting channel 7, a cylinder liner water jacket 24 and a second connecting channel 8, the first connecting channel 7 and the second connecting channel 8 are all arranged near the top of the cylinder liner water jacket 24, the height of the second water collecting cavity 22 and the third water collecting cavity 23 is larger than that of the cylinder jacket water jacket 24, the water inlet of the upper water jacket 111 is communicated with the first water collecting cavity 21 through a third water flow channel 5, the water outlet of the upper water jacket 111 is communicated with a radiator through a fourth water flow channel 6, a lower water jacket 112, a first water flow channel 3, the second water collecting cavity 22, the cylinder jacket water jacket 24 and the third water collecting cavity 23 in sequence, the water outlet of the lower water jacket 112 is communicated with the third water collecting cavity 23 through a second water flow channel 4, the side surface of the second water collecting cavity 22 is provided with a split outlet 221 communicated with the radiator, the first water flow channel 3 is a main water flow channel, the near exhaust side is provided, the cross section area of the first water flow channel 3 is larger than that of the second water flow channel 4, the fourth water flow channel 6 is provided near the cylinder head fuel injector mounting hole and the exhaust valve, the number of the third water flow channels 5 is the total number of the cylinders minus one, and the third water flow channels are positioned between two adjacent cylinders.
The cooling method of the engine cooling system sequentially comprises the following steps:
1. firstly, cooling liquid is fed into the first water collecting cavity 21, and then flows into the lower water jacket 112 through the third water jacket 5, the upper water jacket 111 and the fourth water jacket 6 in sequence;
2. a part of the cooling liquid flowing out of the lower water jacket 112 from the lower water jacket 112 flows into the second water collecting cavity 22 through the first water flow channel 3, the other part directly flows into the radiator through the second water flow channel 4 and the third water collecting cavity 23, then the cooling liquid in the second water collecting cavity 22 is split, the part flows into the radiator through the cylinder jacket 24 and the third water collecting cavity 23 in sequence, and the other part directly enters the radiator through the split outlet 221.
Example 2:
referring to fig. 1, 2 and 4, the method is the same as embodiment 1, and the structure is different from embodiment 1 in that:
the first water collecting chamber 21 is located below the third water collecting chamber 23.
Claims (2)
1. The utility model provides an engine cooling system, includes cylinder head (1), cylinder block (2), be provided with cylinder head water jacket (11) in cylinder head (1), the outside of cylinder block (2) is provided with first water collecting cavity (21), second water collecting cavity (22), third water collecting cavity (23), its characterized in that:
the first water collecting cavity (21) is communicated with the third water collecting cavity (23) sequentially through the cylinder cover water jacket (11) and the second water collecting cavity (22), a split outlet (221) communicated with the radiator is formed in the second water collecting cavity (22), the second water collecting cavity (22) and the third water collecting cavity (23) are respectively located at two sides of the top of the cylinder body (2), the second water collecting cavity (22) is communicated with the third water collecting cavity (23) sequentially through a first connecting channel (7), a cylinder jacket water jacket (24) and a second connecting channel (8), the first connecting channel (7) and the second connecting channel (8) are both arranged near the top of the cylinder jacket water jacket (24), and the heights of the second water collecting cavity (22) and the third water collecting cavity (23) are larger than that of the cylinder jacket water jacket (24);
the cylinder head water jacket (11) comprises an upper water jacket (111) and a lower water jacket (112), wherein a water inlet of the upper water jacket (111) is communicated with the first water collecting cavity (21) through a third water flow channel (5), a water outlet of the upper water jacket (111) is communicated with the second water collecting cavity (22) through a fourth water flow channel (6), the lower water jacket (112) and a first water flow channel (3) in sequence, and a water outlet of the lower water jacket (112) is communicated with the third water collecting cavity (23) through a second water flow channel (4);
when the total number of the cylinders is greater than 1, the number of the third water flow channels (5) is one less than the total number of the cylinders and is positioned between two adjacent cylinders, the number of the lower water jackets (112) is the total number of the cylinders, and the cylinders of the lower water jackets (112) are independently arranged.
2. An engine cooling system according to claim 1, wherein: the first water collecting cavity (21) is located below the second water collecting cavity (22) or the third water collecting cavity (23), the split-flow outlet (221) is located on the side face or the end face of the second water collecting cavity (22), the first water flow channel (3) is a main water flow channel and is arranged on the near exhaust side, the cross section area of the first water flow channel (3) is larger than that of the second water flow channel (4), and the fourth water flow channel (6) is arranged near a cylinder cover fuel injector mounting hole and an exhaust valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711216908.6A CN107956590B (en) | 2017-11-28 | 2017-11-28 | Engine cooling system and cooling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711216908.6A CN107956590B (en) | 2017-11-28 | 2017-11-28 | Engine cooling system and cooling method thereof |
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| CN107956590A CN107956590A (en) | 2018-04-24 |
| CN107956590B true CN107956590B (en) | 2023-07-11 |
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| CN201711216908.6A Active CN107956590B (en) | 2017-11-28 | 2017-11-28 | Engine cooling system and cooling method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018116973A1 (en) * | 2018-07-13 | 2020-01-16 | Man Truck & Bus Se | Cylinder head and crankcase for an internal combustion engine |
| CN108894887A (en) * | 2018-09-06 | 2018-11-27 | 广西玉柴机器股份有限公司 | the water jacket of engine |
| CN109184935A (en) * | 2018-10-09 | 2019-01-11 | 广西玉柴机器股份有限公司 | The high-order cooling water jacket structure of Combined cylinder lid |
| CN109931143A (en) * | 2019-04-19 | 2019-06-25 | 安徽华菱汽车有限公司 | A kind of engine and its engine cooling apparatus |
| CN111692005A (en) * | 2020-07-07 | 2020-09-22 | 天津特瑞捷动力科技有限公司 | Longitudinal and transverse mixed flow double-loop engine cooling system |
| CN111894754B (en) * | 2020-07-20 | 2021-07-06 | 东风商用车有限公司 | Cooling device of counter-flow diesel engine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0932633A (en) * | 1995-07-12 | 1997-02-04 | Fuji Heavy Ind Ltd | Cooling water passage of water cooled horizontal opposed type multi-cylinder engine |
| JP4552884B2 (en) * | 2006-04-24 | 2010-09-29 | マツダ株式会社 | Engine cooling system |
| CN201339502Y (en) * | 2008-11-12 | 2009-11-04 | 广西玉柴机器股份有限公司 | Engine cooling system |
| JP5711715B2 (en) * | 2012-10-19 | 2015-05-07 | 本田技研工業株式会社 | Cylinder head coolant passage structure |
| CN103615333B (en) * | 2013-12-10 | 2017-01-25 | 安徽江淮汽车股份有限公司 | Engine cylinder block water jacket |
| CN203906107U (en) * | 2014-05-07 | 2014-10-29 | 广西玉柴机器股份有限公司 | Combined type air cylinder cover and internal combustion engine body |
| CN105697180A (en) * | 2016-04-11 | 2016-06-22 | 广西玉柴机器股份有限公司 | Layered-cooled cylinder cover |
| CN207634197U (en) * | 2017-11-28 | 2018-07-20 | 东风商用车有限公司 | A kind of engine-cooling system |
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