CN109519296B - Engine cylinder cover integrated with thermostat mounting base - Google Patents
Engine cylinder cover integrated with thermostat mounting base Download PDFInfo
- Publication number
- CN109519296B CN109519296B CN201811197336.6A CN201811197336A CN109519296B CN 109519296 B CN109519296 B CN 109519296B CN 201811197336 A CN201811197336 A CN 201811197336A CN 109519296 B CN109519296 B CN 109519296B
- Authority
- CN
- China
- Prior art keywords
- water jacket
- thermostat
- mounting base
- cylinder cover
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 134
- 238000005192 partition Methods 0.000 claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 20
- 239000000446 fuel Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 2
- 239000000110 cooling liquid Substances 0.000 description 16
- 238000009434 installation Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 210000000476 body water Anatomy 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- 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
- F02F1/242—Arrangement of spark plugs or injectors
-
- 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
-
- 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
Landscapes
- 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
An engine cylinder head incorporating a thermostat mounting base, comprising: the device comprises an air inlet side surface, an air outlet side surface, a top surface, a thermostat mounting base, an integral upper water jacket, an independent lower water jacket, a water outlet channel, a thermostat small circulation water return hole, an upper water jacket partition plate casting hole, a lower water jacket partition plate casting hole and a fuel injector bushing; the bottom surface of the cylinder cover is cast with an upper water hole, the upper water hole is communicated with an independent lower water jacket of each cylinder, and the independent lower water jacket is communicated with a cavity around the fuel injector bushing through an upper water jacket partition plate casting hole and a lower water jacket partition plate casting hole; a thermostat base is cast on the top surface of the cylinder cover, which is close to the exhaust side surface, and the thermostat base is communicated with a water outlet channel of the water jacket on the whole cylinder cover. The thermostat mounting base is integrated on the cylinder cover, so that the whole diesel engine is compact in structure and convenient to mount, leakage risks are reduced, and reliability and suitability of the diesel engine are improved. The double-layer water jacket design and the independent water jacket arrangement are adopted, so that each high heat load area at the bottom plate of the cylinder cover is uniformly and efficiently cooled, the heat load of the cylinder cover is reduced, and meanwhile, the rigidity of the cylinder cover is improved.
Description
Technical Field
The invention belongs to the field of internal combustion engines, and relates to an engine cylinder cover integrated with a thermostat mounting base.
Background
As is well known, off-road diesel engines generally employ a forced coolant circulation system to ensure that the engine operates at a relatively stable temperature. The cooling liquid of the engine is pumped into the cylinder body water jacket after being pressurized by the water pump, all parts of the cylinder body are cooled, then flows into the cylinder cover water jacket upwards, flows out of the engine from the upper part of the cylinder cover after cooling high-temperature parts such as a bottom plate, an oil sprayer and the like, enters the water pump to be pressurized again to start the next cycle, or enters the water pump after being cooled by the radiator. At present, most of cooling water jackets of engine cylinder covers are of single-layer structures, which is not beneficial to cooling of high-temperature areas of the cylinder covers, and rigidity of the cylinder covers is low, which is not beneficial to power improvement of the engine.
According to the temperature of the cooling liquid flowing out of the cylinder cover, the forced circulation of the cooling liquid is divided into large circulation and small circulation, wherein the small circulation means that when the water temperature of the engine is low, the main valve of the thermostat is closed, the auxiliary valve is opened, the cooling liquid directly enters the water pump, and after being pressurized, the cooling liquid sequentially flows through the cylinder body water jacket and the cylinder cover water jacket, so that the cooling circulation of the engine is completed; when the temperature of the cooling liquid flowing out of the engine exceeds the limit value of the opening of the thermostat, the main valve of the thermostat is opened, the auxiliary valve is closed, and the cooling liquid flowing out of the water jacket of the cylinder cover enters the radiator through the thermostat to be cooled and then returns to the water pump.
The thermostat assembly is used as a switching mechanism of the large and small circulation of an engine cooling system, an independent shell is generally arranged on or near a water outlet of a cylinder cover at the front end surface of the engine at present and is used as an installation framework of the thermostat, and corresponding water inlet and outlet pipelines are installed to complete the circulation of the whole system; the manufacturing cost is increased due to the need of a separate shell and a pipeline; the external pipeline connection increases the installation workload and has leakage risk; meanwhile, the structure needs larger installation space, and the arrangement of accessories at the front end of the whole engine is difficult.
Disclosure of Invention
The invention aims to provide a double-layer water jacket cylinder cover which is compact in arrangement, simple in structure and provided with a thermostat mounting base, so that the defects in the prior art are overcome.
The technical scheme of the invention is as follows: an engine cylinder head incorporating a thermostat mounting base, comprising: the air inlet side surface 1, the air outlet side surface 2, the top surface 3, the thermostat mounting base 4, the bolt hole 5, the integral upper water jacket 6, the independent lower water jacket 7, the water outlet channel 8, the thermostat small circulation water return hole 9, the upper water hole 10, the upper water jacket partition plate casting hole 11 and the lower water jacket partition plate casting hole 11 and the injector bushing 12; the method is characterized in that: the bottom surface of the cylinder cover is cast with an upper water hole 10, the upper water hole 10 is communicated with an independent lower water jacket 7 of each cylinder, the independent lower water jacket 7 is communicated with an integral upper water jacket 6 through an upper water jacket partition plate casting hole 11 and a lower water jacket partition plate casting hole 11 and a cavity around an injector bushing 12, and the integral upper water jacket 6 is arranged close to the exhaust side surface 2; a thermostat mounting base 4 is cast on the top surface 3 of the cylinder cover, which is close to the exhaust side surface 2, and the thermostat mounting base 4 is communicated with a water outlet channel 8 of a water jacket 6 on the whole cylinder cover.
Bolt holes 5 are distributed around the thermostat mounting base 4, and a thermostat small circulation water return hole 9 is cast at the bottom and communicated with a low-pressure water inlet cavity of the water pump.
The water supply holes 10 are arranged in four cylinders, two are close to the air inlet side surface 1, two are close to the air outlet side surface 2, and are approximately symmetrically arranged relative to the center of the cylinders.
The upper and lower water jacket partition plate casting holes 11 are cast along with the shape of the air inlet and outlet channels.
The height L1 of the lower water jacket is as follows: 15-25 mm.
The height L2 of the upper water jacket is as follows: 55-65 mm.
The distance H1 between the thermostat mounting base and the center of the cylinder is as follows: 125-135 mm; h2 is: 60-65 mm.
The diameter D of the upper and lower water jacket partition plate casting holes 11 is as follows: ∅ 32 to 34 mm.
By adopting the technical scheme, the invention can achieve the following beneficial effects: the cylinder cover adopting the design of the upper water jacket and the lower water jacket is provided with the partition plate between the two cylinders to form an independent water inlet cavity structure of each cylinder, so that the cooling liquid is effectively guided to flow from the periphery of the cylinder cover to the high-temperature part of the central area; the partition plate between the upper water jacket and the lower water jacket forces the cooling liquid to flow close to the bottom plate, thereby effectively ensuring the cooling of the bottom plate and improving the overall rigidity of the cylinder cover body; the casting holes of the upper water jacket partition plate and the lower water jacket partition plate and the cavity around the oil sprayer bushing are used as the only channels between the upper water jacket and the lower water jacket, so that the periphery of the oil sprayer is ensured to have enough cooling liquid to pass through, and the cooling effect of the oil sprayer is ensured; the integrated thermostat mounting base design is adopted, and a complex shell and an external pipeline are not required to be manufactured. The cost can be reduced, the pipeline connection is omitted, the installation of the thermostat assembly is simplified, the working reliability is higher, meanwhile, the thermostat is installed inside the cylinder cover, the installation space is saved, and the installation arrangement of front-end accessories is facilitated.
Drawings
FIG. 1 is a schematic diagram of a thermostat small circulation water return hole of an engine cylinder head integrated with a thermostat mounting base relative to the center position of the cylinder;
FIG. 2 is a schematic view of an integrated thermostat mounting base for an engine cylinder head incorporating the thermostat mounting base of the present invention;
FIG. 3 is a schematic view of the cylinder head upper and lower water jackets of an engine cylinder head incorporating a thermostat mounting base of the present invention;
FIG. 4 is a perspective view of a cylinder head of an engine with an integrated thermostat mounting base in accordance with the present invention;
FIG. 5 is a schematic view of a cylinder head upper and lower water jacket spacer bores and injector liner configuration of an engine cylinder head incorporating a thermostat mounting base of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 to 5, a cylinder head incorporating a thermostat mounting base includes: the air inlet side surface 1, the air outlet side surface 2, the top surface 3, the thermostat mounting base 4, the bolt holes 5, the integral upper water jacket 6, the independent lower water jacket 7, the water outlet channel 8, the thermostat small circulation water return hole 9, the upper water hole 10, the upper water jacket partition plate casting hole 11 and the lower water jacket partition plate casting hole 11 and the injector bushing 12. The bottom surface of the cylinder cover is cast with water feeding holes 10, four water feeding holes are arranged in each cylinder, two water feeding holes are close to the air inlet side surface 1, two water discharging holes are close to the air outlet side surface 2, and the water feeding holes are approximately symmetrically arranged relative to the center of the cylinder. The upper water hole 10 is communicated with the independent lower water jacket 7 of each cylinder, the independent lower water jacket 7 is communicated with the integral upper water jacket 6 through the upper water jacket partition plate casting holes 11 and the cavity around the fuel injector bushing 12, and the upper water jacket partition plate casting holes 11 are cast along with the shape of the air inlet and the air outlet; the water jacket 6 is arranged close to the exhaust side 2 as a whole; a thermostat mounting base 4 is cast on the top surface 3 of the cylinder cover near the exhaust side surface 2 and is communicated with a water outlet channel 8 of a water jacket 6 on the whole cylinder cover. Bolt holes 5 are distributed around the thermostat mounting base 4, and a thermostat small circulation water return hole 9 is cast at the bottom and communicated with a low-pressure water inlet cavity of the water pump.
The height L1 of the independent lower water jacket 7 is: 15-25 mm.
The height L2 of the water jacket 6 as a whole is: 55-65 mm.
The distance H1 between the thermostat mounting base and the center of the cylinder is as follows: 125-135 mm; h2 is: 60-65 mm.
The diameter D of the upper and lower water jacket partition plate casting holes 11 is as follows: ∅ 32 to ∅ mm.
When the engine runs, cooling liquid enters the independent lower water jacket 7 from the periphery of each cylinder through the cylinder cover upper water holes 10 from the cylinder body, then flows to the high temperature part in the central area, cools the high temperature 'four corner area' between the air valve and the oil injector, then the cooling liquid of each cylinder respectively passes through the upper water jacket baffle cast holes 11 of the corresponding cylinder and the cavities around the oil injector bushing 12, enters the integral upper water jacket 6, flows towards the front end in a diffusion mode, and enters the water cavity near the installation base 4 of the thermostat through the water outlet channel 8. When the temperature of the cooling liquid is lower than the opening temperature of the main valve, the main valve of the thermostat is closed, the auxiliary valve is opened, the upward passage is cut off, the downward passage is opened, water flow directly enters the low-pressure cavity of the water pump through the small circulation water return hole 9 of the thermostat cast at the bottom hole of the mounting base 4 of the thermostat, and engine cooling liquid is subjected to small circulation; when the temperature of the cooling liquid exceeds the opening temperature of the main valve, the main valve of the thermostat is opened, the auxiliary valve is closed, the downward passage is blocked, the upward passage is opened, the cooling water flows upwards through the mounting base 4 of the thermostat, flows to the external radiator for cooling, then flows back to the low-pressure cavity of the water pump, and the engine cooling liquid is subjected to large circulation.
The double-layer water jacket cylinder cover with the integrated thermostat mounting base is adopted, and the independent lower water jacket design of each cylinder improves the rigidity of the whole cylinder cover and ensures that the cooling water flow and the flow velocity of each cylinder on the bottom plate of the cylinder cover are uniform. Meanwhile, as the oil sprayer is positioned at the center of the cylinder and is perpendicular to the bottom surface of the cylinder, a through hole is cast at the same position of the upper water jacket partition plate and the lower water jacket partition plate of each cylinder of the cylinder cover, cooling water flow of the lower water jacket can flow to the upper water jacket through the hole in a forced way, the cooling of the oil sprayer is facilitated, and the use reliability of the oil sprayer is improved. The integrated thermostat mounting base is designed, a complex shell and an external connecting pipeline are not needed, the installation of the thermostat assembly is simplified, the installation space is saved, and the installation arrangement of front-end accessories is facilitated.
Because the installation base of the thermostat is integrated on the cylinder cover, the whole diesel engine has compact structure, saves space, is convenient to install, reduces leakage risk and improves the reliability and suitability of the diesel engine. The double-layer water jacket design and the independent water jacket arrangement are adopted, so that each high heat load area at the bottom plate of the cylinder cover is uniformly and efficiently cooled, the heat load of the cylinder cover is reduced, and meanwhile, the rigidity of the cylinder cover is improved.
The foregoing detailed description will be given for the purpose of illustrating the general principles and features of the present invention, and are not meant to limit the scope of the invention in any way, but rather to limit the scope of the invention. Modifications, equivalents, and the like, which are all intended to be included within the spirit and scope of the present invention, are intended to be included within the scope of the present invention.
Claims (2)
1. An engine cylinder head incorporating a thermostat mounting base, comprising: the thermostat comprises an air inlet side surface (1), an air outlet side surface (2), a top surface (3), a thermostat mounting base (4), bolt holes (5), an integral upper water jacket (6), an independent lower water jacket (7), a water outlet channel (8), a thermostat small circulation water return hole (9), an upper water hole (10), an upper water jacket partition plate casting hole (11) and a fuel injector bushing (12); the method is characterized in that: the bottom surface of the cylinder cover is cast with an upper water hole (10), the upper water hole (10) is communicated with an independent lower water jacket (7) of each cylinder, the independent lower water jacket (7) is communicated with an integral upper water jacket (6) through an upper water jacket partition plate casting hole (11) and a cavity around an oil injector bushing (12), and the integral upper water jacket (6) is arranged close to the exhaust side surface (2); a thermostat mounting base (4) is cast on the top surface (3) of the cylinder cover, which is close to the exhaust side surface (2), and the thermostat mounting base (4) is communicated with a water outlet channel (8) of a water jacket (6) on the whole cylinder cover; bolt holes (5) are distributed around the thermostat mounting base (4), and a thermostat small circulation backwater hole (9) is cast at the bottom and communicated with a low-pressure water inlet cavity of the water pump; four water supply holes (10) are formed in each cylinder, two water supply holes are close to the air inlet side surface (1), two water supply holes are close to the air outlet side surface (2), and the water supply holes are approximately symmetrically arranged relative to the center of the cylinder; the upper and lower water jacket partition plate casting holes (11) are cast along with the shape of the air inlet and outlet channels.
2. An engine cylinder head incorporating a thermostat mounting base as set forth in claim 1 wherein: the height L1 of the independent lower water jacket (7) is as follows: 15-25 mm; the height L2 of the water jacket (6) is as a whole: 55-65 mm; the distance H1 between the thermostat mounting base (4) and the center of the cylinder is as follows: 125-135 mm; h2 is: 60-65 mm; the diameter D of the upper water jacket partition plate casting hole (11) is as follows: ∅ 32 to 34mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197336.6A CN109519296B (en) | 2018-10-15 | 2018-10-15 | Engine cylinder cover integrated with thermostat mounting base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197336.6A CN109519296B (en) | 2018-10-15 | 2018-10-15 | Engine cylinder cover integrated with thermostat mounting base |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109519296A CN109519296A (en) | 2019-03-26 |
| CN109519296B true CN109519296B (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811197336.6A Active CN109519296B (en) | 2018-10-15 | 2018-10-15 | Engine cylinder cover integrated with thermostat mounting base |
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| Country | Link |
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| CN (1) | CN109519296B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852682B (en) * | 2020-06-04 | 2022-04-05 | 浙江义利汽车零部件有限公司 | Engine cooling water jacket system, engine cooling method and vehicle |
| CN114837844A (en) * | 2022-06-01 | 2022-08-02 | 江苏常发农业装备股份有限公司 | Cylinder cover and engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010003356A1 (en) * | 2008-07-07 | 2010-01-14 | 奇瑞汽车股份有限公司 | A v-type engine and a cooling system thereof |
| CN202789169U (en) * | 2012-08-14 | 2013-03-13 | 北京长源朗弘科技有限公司 | Cylinder cover with thermostat installing hole |
| CN105298675A (en) * | 2015-12-07 | 2016-02-03 | 潍柴动力股份有限公司 | Engine and cylinder cover thereof |
| CN207178048U (en) * | 2017-09-05 | 2018-04-03 | 广西玉柴机器股份有限公司 | A kind of cylinder cover for diesel engine |
| CN209100149U (en) * | 2018-10-15 | 2019-07-12 | 第一拖拉机股份有限公司 | A kind of engine cylinder cap of integrated thermostat mounting seat |
-
2018
- 2018-10-15 CN CN201811197336.6A patent/CN109519296B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010003356A1 (en) * | 2008-07-07 | 2010-01-14 | 奇瑞汽车股份有限公司 | A v-type engine and a cooling system thereof |
| CN202789169U (en) * | 2012-08-14 | 2013-03-13 | 北京长源朗弘科技有限公司 | Cylinder cover with thermostat installing hole |
| CN105298675A (en) * | 2015-12-07 | 2016-02-03 | 潍柴动力股份有限公司 | Engine and cylinder cover thereof |
| CN207178048U (en) * | 2017-09-05 | 2018-04-03 | 广西玉柴机器股份有限公司 | A kind of cylinder cover for diesel engine |
| CN209100149U (en) * | 2018-10-15 | 2019-07-12 | 第一拖拉机股份有限公司 | A kind of engine cylinder cap of integrated thermostat mounting seat |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109519296A (en) | 2019-03-26 |
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| CB03 | Change of inventor or designer information |
Inventor after: Shang Tansu Inventor after: Liu Shiqian Inventor after: Wang Bin Inventor after: Wang Yanyan Inventor after: Zhang Weixun Inventor after: Wei Minghui Inventor after: Dong Wei Inventor after: Zhou Haisong Inventor after: Zhou Kun Inventor after: Li Zhenyong Inventor after: Wei Mingliang Inventor after: Du Xiaohui Inventor after: Qi Yulong Inventor before: Wei Minghui Inventor before: Liu Shiqian Inventor before: Wang Bin Inventor before: Wang Yanyan Inventor before: Zhang Weixun Inventor before: Dong Wei Inventor before: Shang Tansu Inventor before: Zhou Haisong Inventor before: Zhou Kun Inventor before: Li Zhenyong Inventor before: Wei Mingliang Inventor before: Du Xiaohui Inventor before: Qi Yulong |
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