KR20000020721U - Diesel engine cooling device of liquid type cylinder liner - Google Patents
Diesel engine cooling device of liquid type cylinder liner Download PDFInfo
- Publication number
- KR20000020721U KR20000020721U KR2019990008097U KR19990008097U KR20000020721U KR 20000020721 U KR20000020721 U KR 20000020721U KR 2019990008097 U KR2019990008097 U KR 2019990008097U KR 19990008097 U KR19990008097 U KR 19990008097U KR 20000020721 U KR20000020721 U KR 20000020721U
- Authority
- KR
- South Korea
- Prior art keywords
- cylinder
- cylinder liner
- cylinder block
- cooling
- contact surface
- Prior art date
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 239000000498 cooling water Substances 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims abstract description 5
- 230000002265 prevention Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000002826 coolant Substances 0.000 description 5
- 238000013021 overheating Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
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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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/16—Cylinder liners of wet type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
-
- 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
- F02F11/00—Arrangements of sealings in combustion engines
- F02F11/005—Arrangements of sealings in combustion engines involving cylinder liners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/021—Cooling cylinders
-
- 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
- F02F1/004—Cylinder liners
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
본 고안의 목적은 냉각성이 나쁜 피스톤의 압축링부위의 냉각성을 크게 향상시킨 구조의 습식 실린더 라이너형 디젤엔진 냉각장치를 제공하는데 있다.It is an object of the present invention to provide a wet cylinder liner type diesel engine cooling apparatus having a structure which greatly improves the cooling performance of a compression ring portion of a piston having poor cooling ability.
본 고안은 상기한 목적을 달성하기 위하여The present invention to achieve the above object
실린더 블록과, 그 실린더 블록에 끼워지는 실린더 라이너와, 그 실린더 블록과 실린더 라이너 사이에 형성되는 워터재킷을 포함하며, 그 워터재킷 상부로 실린더 블록과 실린더 라이너의 접촉면이 형성되고, 그 접촉면에 누설방지를 위해 O-링이 삽입되며, 피스톤의 상사점 위치에서 압축링이 적어도 상기 접촉면상에 위치하거나 또는 그 상부측에 위치하게 되는 습식 실린더 라이너를 갖는 디젤 엔진에 있어서,A cylinder block, a cylinder liner fitted to the cylinder block, and a water jacket formed between the cylinder block and the cylinder liner, wherein a contact surface of the cylinder block and the cylinder liner is formed above the water jacket, and leaks on the contact surface. In a diesel engine having a wet cylinder liner in which an O-ring is inserted for prevention and a compression ring is located at least on or above the contact surface at the top dead center position of the piston,
상기 워터재킷의 상부로써 상기 접촉면에 접하는 위치인 상기 실린더 블록 상부측에 워터펌프에 의해 급송되는 냉각수가 흐르도록 주조시 냉각홀을 형성한 것을 특징으로 한다.Cooling hole is formed during casting so that the cooling water fed by the water pump flows to the upper side of the cylinder block which is a position in contact with the contact surface as the upper portion of the water jacket.
Description
본 고안은 습식 실린더 라이너형의 디젤엔진의 피스톤, 특히 압축링 부위의 피스톤 냉각을 위한 디젤엔진 냉각장치에 관한 것이다.The present invention relates to a diesel engine cooling device for cooling a piston of a diesel engine of a wet cylinder liner type, in particular a piston of a compression ring portion.
실린더에는 실린더 블록과 일체로 주조되어 있는 것과 실린더 라이너를 사용한 것이 있는 바, 디젤엔진에서는 통상 실린더 라이너를 사용하는 것이 많다.There are many cylinders that are integrally cast with cylinder blocks and cylinder liners. In diesel engines, cylinder liners are usually used.
실린더 라이너를 사용하는 이점은 주철재의 실린더 블록과는 별도의 재료나 주조방법을 사용하여 내마모성이 좋은 것을 사용할 수 있으며, 또한 정비가 편리한점 때문에 많이 사용되고 있다.The advantage of using a cylinder liner is that it is used because of its excellent wear resistance by using a material or casting method that is separate from the cylinder block of cast iron, and is also widely used because of the convenience of maintenance.
그런데 실린더내의 연소가스 온도가 2000℃ 이상에 달하고 이 열의 상당부분이 실린더, 실린더헤드, 피스톤 등에 전달되므로써 이들 부분의 온도가 과도하게 상승할 경우 실린더 변형의 원인이 되거나 실린더 벽의 유막을 파괴하여 윤활불량을 일으키게 되므로, 엔진의 과열에 의한 손상을 방지하기 위하여 엔진을 냉각시키게 되며, 다실린더 엔진의 경우 통상 냉각수를 엔진에 순환시켜 냉각시키고 있으며, 이를 위해 엔진에는 냉각수가 순환하는 워터재킷이 형성되어 있다.However, if the temperature of the combustion gas in the cylinder reaches 2000 ℃ or more and a large part of this heat is transmitted to the cylinder, cylinder head, piston, etc., if the temperature of these parts rises excessively, it may cause deformation of the cylinder or destroy the oil film on the cylinder wall. In order to prevent damage caused by overheating of the engine, the engine is cooled. In the case of a multicylinder engine, the cooling water is circulated in the engine to cool the engine. have.
실린더 라이너에는 라이너가 냉각수에 직접 접촉하지 아니하고 실린더 블록을 거쳐 냉각하는 건식라이너와 라이너의 바깥 주변이 워터재킷이 되어 직접 냉각수가 접촉하는 습식 라이너의 2종류가 있으며, 본 고안은 그 중 습식 라이너를 갖는 엔진의 냉각구조 개선에 대한 것이다.There are two types of cylinder liners: the dry liner where the liner is not in direct contact with the coolant but the cooler that the coolant contacts directly with the water jacket on the outer periphery of the liner. It is to improve the cooling structure of the engine having.
종래 습식 라이너 엔진의 구조를 도 2에 도시하였는 바, 실린더 블록(1)에는 원통형의 실린더 라이너(2a)(2b)가 끼워지며, 실린더 라이너(2a)(2b)의 상단부에는 플랜지(3a)(3b)가 형성되고, 그 플랜지(3a)(3b)가 실린더 블록(1)의 홈(4a)(4b)에 결합하여 위치 결정되며, 실린더 라이너(2a)(2b) 윗면이 실린더 블록(1)의 윗면보다 약간 상부로 튀어나와 있고 그 사이에 실린더 헤드 가스켓(5)이 위치하여 실린더 헤드와의 사이에 기밀 및 수밀을 유지하고 있다.The structure of the conventional wet liner engine is illustrated in FIG. 2, and the cylinder block 1 is fitted with cylindrical cylinder liners 2a and 2b, and the upper end of the cylinder liner 2a and 2b has a flange 3a ( 3b is formed, the flanges 3a and 3b are positioned in engagement with the grooves 4a and 4b of the cylinder block 1, and the upper surface of the cylinder liners 2a and 2b is the cylinder block 1 It protrudes slightly above the upper surface of the cylinder head, and the cylinder head gasket 5 is positioned therebetween to maintain the airtightness and watertight between the cylinder head.
그리고 실린더 블록(1)과 실린더 라이너(2a)(2b) 사이에 형성되는 공간은 워터재킷(6a)(6b)으로서 워터펌프에 의해 강제 급송되는 냉각수가 순환하게 된다.The space formed between the cylinder block 1 and the cylinder liners 2a and 2b is a water jacket 6a and 6b to circulate the cooling water forcedly fed by the water pump.
또 워터재킷(6a)(6b) 상부의 실린더 블록(1)과 실린더 라이너(2a)(2b)의 접촉면(7a)(7b)에는 냉각수의 누설을 방지하기 위하여 O-링(8a)(8b)이 삽입되어 있다.In addition, the contact surfaces 7a and 7b of the cylinder block 1 and the cylinder liners 2a and 2b above the water jackets 6a and 6b have O-rings 8a and 8b to prevent leakage of cooling water. Is inserted.
그러나 상기와 같은 습식 라이너를 갖는 대형 디젤엔진의 경우 피스톤 냉각과 관련하여 다음과 같은 문제점이 지적되고 있다.However, in the case of a large diesel engine having such a wet liner, the following problems have been pointed out with respect to the piston cooling.
피스톤(9)이 상사점 위치에 다다라 폭발이 일어나게 될 때 피스톤(9)과 압축링(10, Top ring)이 최대로 열부하를 받게 되는데, 이때 압축링(10) 위치가 워터재킷(6a)(6b)과는 벗어난 위치인 접촉면(7a)(7b)상에 위치하게 되어 냉각성이 크게 떨어지게 되므로써, 고출력 대형 디젤엔진의 경우 더더욱 압축링(10) 부품의 온도가 크게 상승하여 피스톤 파손의 원인이 되고 있다.When the piston (9) reaches the top dead center position, the piston (9) and the compression ring (10, Top ring) is subjected to the maximum heat load when the explosion occurs, wherein the position of the compression ring (10) is the water jacket (6a) (6b) Since it is located on the contact surface (7a) (7b) that is out of the position and the cooling performance is greatly reduced, in the case of a high-power large diesel engine, the temperature of the parts of the compression ring 10 is further increased, causing the piston to break.
이에 본 고안은 상기한 문제점을 감안하여 제안된 것으로서 그의 목적으로 하는 것은 냉각성이 나쁜 피스톤의 압축링부위의 냉각성을 크게 향상시킨 구조의 습식 실린더 라이너형 디젤엔진 냉각장치를 제공하는데 있다.The present invention has been proposed in view of the above problems, and its object is to provide a wet cylinder liner type diesel engine cooling apparatus having a structure which greatly improves the cooling property of a compression ring portion of a piston having poor cooling ability.
상기한 목적을 달성하기 위하여 본 고안은The present invention to achieve the above object is
실린더 블록과, 그 실린더 블록에 끼워지는 실린더 라이너와, 그 실린더 블록과 실린더 라이너 사이에 형성되는 워터재킷을 포함하며, 그 워터재킷 상부로 실린더 블록과 실린더 라이너의 접촉면이 형성되고, 그 접촉면에 누설방지를 위해 O-링이 삽입되며, 피스톤의 상사점 위치에서 압축링이 적어도 상기 접촉면상에 위치하거나 또는 그 상부측에 위치하게 되는 습식 실린더 라이너를 갖는 디젤 엔진에 있어서,A cylinder block, a cylinder liner fitted to the cylinder block, and a water jacket formed between the cylinder block and the cylinder liner, wherein a contact surface of the cylinder block and the cylinder liner is formed above the water jacket, and leaks on the contact surface. In a diesel engine having a wet cylinder liner in which an O-ring is inserted for prevention and a compression ring is located at least on or above the contact surface at the top dead center position of the piston,
상기 워터재킷의 상부로써 상기 접촉면에 접하는 위치인 상기 실린더 블록 상부측에 워터펌프에 의해 급송되는 냉각수가 흐르도록 주조시 냉각홀을 형성한 것을 특징으로 한다.Cooling hole is formed during casting so that the cooling water fed by the water pump flows to the upper side of the cylinder block which is a position in contact with the contact surface as the upper portion of the water jacket.
도 1은 본 고안에 의한 습식 실린더 라이너형의 디젤엔진 냉각장치1 is a diesel engine cooling apparatus of a wet cylinder liner type according to the present invention.
도 2는 종래기술2 is a prior art
※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing
1 : 실린더 블록 2a,2b : 실린더 라이너1: Cylinder Block 2a, 2b: Cylinder Liner
6a,6b : 워터재킷 7a,7b : 접촉면6a, 6b: Water jacket 7a, 7b: Contact surface
9 : 피스톤 10 : 압축링(Top ring)9: Piston 10: Compression ring (Top ring)
11 : 냉각홀 12 : 파이프11: cooling hole 12: pipe
이하 본 고안의 구성과 작용을 첨부한 도면을 참조하여 설명한다.Hereinafter, with reference to the accompanying drawings the configuration and operation of the present invention.
도 1은 본 고안에 의한 습식 실린더 라이너형 디젤엔진 냉각장치를 나타내는 도면으로 종래설명에서 상술한 부분들은 동일부호를 사용하여 설명하였으며, 중복된 상세한 설명은 생략하였다.1 is a view showing a wet cylinder liner-type diesel engine cooling apparatus according to the present invention, the above-mentioned parts in the prior description have been described using the same reference numerals, and detailed descriptions thereof will be omitted.
도면에 있어서 부호 1은 실린더 블록, 부호 2a,2b는 실린더 라이너, 부호 3a,3b는 플랜지, 부호 5는 실린더 헤드 가스켓, 그리고 부호 9는 피스톤이며, 부호 10은 압축링(Top ring)이고 부호 10a은 오일링이고, 부호 8a,8b는 O-링이다.In the drawings, reference numeral 1 denotes a cylinder block, numerals 2a and 2b denote cylinder liners, numerals 3a and 3b denote flanges, numeral 5 denotes a cylinder head gasket, numeral 9 denotes a piston, numeral 10 denotes a top ring, and numeral 10a denotes a Oil ring, and 8a and 8b are O-rings.
실린더 블록(1)과 실린더 라이너(2a)(2b) 사이에는 공간이 형성되어 있으며, 그 공간은 워터펌프로부터 급송되는 냉각수가 순환하는 워터재킷(6a)(6b)이다.A space is formed between the cylinder block 1 and the cylinder liners 2a and 2b, and the space is a water jacket 6a and 6b through which coolant supplied from the water pump circulates.
그 워터재킷(6a)(6b)의 상부로는 실린더 블록(1)과 실린더 라이너(2a)(2b)가 직접 맞대어 접촉하는 접촉면(7a)(7b)이 있으며, 이 접촉면(7a)(7b)의 틈새를 통하여 냉각수가 누설되는 것을 방지하기 위하여 상기 O-링(8a)(8b)이 개재되어 있다.Above the water jackets 6a and 6b, there are contact surfaces 7a and 7b in which the cylinder block 1 and the cylinder liner 2a and 2b are directly butted to contact each other, and the contact surfaces 7a and 7b. The O-rings 8a and 8b are interposed in order to prevent the coolant from leaking through the gap of the gap.
피스톤(9)이 상사점 근방위치에서 상기 압축링(10)은 접촉면(7a)(7b)과 동일 수평선상이거나 또는 그 상부측에 위치하게 되는데 이 때문에 워터재킷(6a)(6b)내의 냉각수의 영향이 미치지 아니하여 압축링(10) 부근의 피스톤(9)의 냉각성이 나빠지게 되는 것을 방지하고자 본 고안에서는 워터재킷(6a)(6b)의 상부로 살두께가 가장 큰 양측 접촉면(7a)(7b) 사이의 실린더 블록(1) 상부측(1a)에 주조시 원형의 냉각홀(11)을 뚫어 형성한 후 그 냉각홀(11)에는 워터펌프로부터 급송되는 냉각수가 순환하도록 하였다.When the piston 9 is located near the top dead center, the compression ring 10 is located on the same horizontal line as the contact surface 7a, 7b, or on the upper side thereof. Therefore, the influence of the cooling water in the water jackets 6a, 6b. In order to prevent the cooling of the piston 9 near the compression ring 10 from deteriorating, the present invention devises both contact surfaces 7a and 7b having the largest thickness at the top of the water jackets 6a and 6b. After the cylindrical cooling hole 11 was formed in the upper side 1a of the cylinder block 1 in between, the cooling water fed from the water pump was circulated in the cooling hole 11.
그리고 그 냉각홀(11)은 주조시 공간 형태로 두어도 무방하나 도시된 것과같이 파이프(12)를 삽입할 수도 있다.And the cooling hole 11 may be placed in the form of space during casting, but may insert the pipe 12 as shown.
이와같은 본 고안은 피스톤 압축이 끝나고 폭발시 최대의 열부하가 피스톤(9) 상부면과 압축링(10) 및 압축링(10)에 접한 접촉면(7a)(7b)에 걸리게 되는데 이때 접촉면(7a)(7b) 가까이의 냉각홀(11)을 순환하는 냉각수에 의해 즉시 냉각되므로써, 특히 고열에 취약한 압축링(10) 부품의 과열을 방지하게 되는 것이다.In the present invention, when the piston compression is completed, the maximum heat load at the time of explosion is applied to the upper surface of the piston (9) and the contact surface (7a) (7b) in contact with the compression ring (10) and the compression ring (10), wherein the contact surface (7a) (7b) By immediately cooling by the cooling water circulating near the cooling hole (11), it is possible to prevent overheating of the parts of the compression ring 10, which is particularly vulnerable to high heat.
이상과 같은 본 고안에 의하면 실린더 블록과 실린더 라이너 사이에 형성된 워터재킷의 영향을 적게받는 피스톤의 압축링 부위의 냉각성 향상을 위해 워터재킷의 상부로서 살두께가 두꺼운 실린더 블록 상부측에 냉각수가 순환하는 냉각홀을 형성하는 것에 의해서, 그 냉각홀을 흐르는 냉각수에 의해 피스톤의 압축링 부위가 신속히 냉각되어 과열에 의한 소착현상과 유막파괴 등을 방지하여 피스톤의 내구성을 향상하게 되는 효과가 있으며, 이로써 피스톤의 손상 걱정없이 엔진출력을 높일 수 있다.According to the present invention as described above, in order to improve the cooling performance of the compression ring portion of the piston which is less affected by the water jacket formed between the cylinder block and the cylinder liner, the cooling water circulates on the upper side of the thick thick cylinder block as the upper part of the water jacket. By forming the hole, the compression ring of the piston is rapidly cooled by the coolant flowing through the cooling hole, thereby preventing the sintering phenomenon and oil film breakdown due to overheating, thereby improving the durability of the piston, thereby damaging the piston. Engine power can be increased without worry.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019990008097U KR20000020721U (en) | 1999-05-13 | 1999-05-13 | Diesel engine cooling device of liquid type cylinder liner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019990008097U KR20000020721U (en) | 1999-05-13 | 1999-05-13 | Diesel engine cooling device of liquid type cylinder liner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20000020721U true KR20000020721U (en) | 2000-12-15 |
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ID=54762757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019990008097U KR20000020721U (en) | 1999-05-13 | 1999-05-13 | Diesel engine cooling device of liquid type cylinder liner |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20000020721U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100405781B1 (en) * | 2000-12-15 | 2003-11-15 | 기아자동차주식회사 | Cavitation reduction structure of engine having wet liner |
| CN111287857A (en) * | 2018-12-10 | 2020-06-16 | 通用汽车环球科技运作有限责任公司 | Method for manufacturing engine cylinder block |
-
1999
- 1999-05-13 KR KR2019990008097U patent/KR20000020721U/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100405781B1 (en) * | 2000-12-15 | 2003-11-15 | 기아자동차주식회사 | Cavitation reduction structure of engine having wet liner |
| CN111287857A (en) * | 2018-12-10 | 2020-06-16 | 通用汽车环球科技运作有限责任公司 | Method for manufacturing engine cylinder block |
| CN111287857B (en) * | 2018-12-10 | 2021-08-31 | 通用汽车环球科技运作有限责任公司 | Method for manufacturing engine cylinder block |
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