WO2022234872A1 - Sodium-sealed cylinder head - Google Patents

Sodium-sealed cylinder head Download PDF

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Publication number
WO2022234872A1
WO2022234872A1 PCT/KR2021/005674 KR2021005674W WO2022234872A1 WO 2022234872 A1 WO2022234872 A1 WO 2022234872A1 KR 2021005674 W KR2021005674 W KR 2021005674W WO 2022234872 A1 WO2022234872 A1 WO 2022234872A1
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Prior art keywords
sodium
spark plug
cylinder head
engine
insertion hole
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PCT/KR2021/005674
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French (fr)
Korean (ko)
Inventor
한명훈
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주식회사 블루플래닛
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Publication of WO2022234872A1 publication Critical patent/WO2022234872A1/en

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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
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—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
    • 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
    • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
    • 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 

Definitions

  • the present invention relates to a cylinder head structure that prevents knocking of an engine by partially encapsulating sodium around a spark plug of a cylinder head constituting a combustion chamber of a spark ignition (SI) engine.
  • SI spark ignition
  • FIG. 1 is a diagram schematically showing the structure of a conventional cylinder head in which a spark plug 200 is installed
  • FIG. 2 is an enlarged view of the spark plug 200 of the cylinder head of FIG. 1 and a surrounding area thereof.
  • a coolant passage (water jacket) 101 is formed inside the cylinder block and cylinder head to prevent the temperature from rising above an allowable value, and the coolant is circulated through the coolant passage 101 to the engine. Prevents temperature rise.
  • An object of the present disclosure is to reduce the knocking phenomenon of the engine by encapsulating sodium in an optimal position for preventing the knocking phenomenon of the engine in order to compensate for the problems of the prior art.
  • the present disclosure provides a cylinder head of an engine that forms a combustion chamber together with a cylinder block, a spark plug insertion hole into which a spark plug is inserted, and a spark plug insertion hole formed adjacent to the spark plug insertion hole and provided with a coolant therein.
  • a cylinder head body having a flowing coolant passage and a sodium sealing hole formed between the spark plug insertion hole and the coolant passage, a spark plug inserted into the spark plug insertion hole so that one end protrudes into the combustion chamber; It is possible to provide a cylinder head of an engine comprising metallic sodium encapsulated in a ball.
  • the sodium may be positioned 1.5-2.5 mm apart from the spark plug.
  • the sodium may be a sodium rod extending along a length direction of the spark plug.
  • the sodium rod may be 2.5-3.5 mm in diameter.
  • the sodium inclusion pore includes 8-12 sodium filling pore
  • the sodium includes 8-12 sodium filling in each of the 8-12 sodium filling pore
  • the sodium filling pore includes may be arranged at equal intervals along a circumferential direction with respect to the spark plug as a center.
  • the present disclosure encapsulates sodium between the spark plug and the water jacket, which is an optimal position for preventing engine knocking, so that the high heat around the spark plug is absorbed by the sodium, and the absorption thereof By allowing the generated heat to be transferred back to the coolant of the water jacket, it is possible to reduce the knocking phenomenon of the engine.
  • FIG. 1 is a view schematically showing the structure of a conventional cylinder head in which a spark plug is installed.
  • FIG. 2 is an enlarged view of a spark plug of the cylinder head of FIG. 1 and a surrounding area thereof;
  • FIG. 3 is an enlarged view of a spark plug of a cylinder head and a peripheral area thereof according to an embodiment of the present disclosure
  • FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 .
  • the optimum point at which temperature control is required in order to prevent engine knocking is the location between the spark plug 200 and the water jacket, and encapsulates the sodium 300 at the optimum location for the engine It is characterized by minimizing knocking of
  • FIG. 3 is an enlarged view of the spark plug 200 of the cylinder head and a peripheral area thereof according to an embodiment of the present disclosure
  • FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 .
  • the cylinder head may include a cylinder head body 100 .
  • the cylinder head body 100 may form the combustion chamber 1 together with the cylinder block body.
  • the cylinder head body 100 has a spark plug insertion hole 103 into which the spark plug 200 is inserted, and a coolant passage (water jacket) 101 formed adjacent to the spark plug insertion hole 103 and through which coolant flows therein. ) and a sodium sealing hole 105 formed between the spark plug insertion hole 103 and the coolant passage 101 may be formed.
  • the spark plug 200 may be inserted and installed into the spark plug insertion hole 103 so that one end protrudes into the combustion chamber 1 .
  • the spark plug 200 causes a spark to ignite the fuel mixed with the compressed air to cause the mixer to explode.
  • the engine may include a radiator (not shown) that radiates heat energy of the coolant to the outside and a water pump (not shown) that forcibly circulates the coolant in order to circulate the coolant through the coolant passage 101 .
  • Metal sodium 300 may be encapsulated in the sodium encapsulation hole 105 .
  • the metallic sodium 300 may be encapsulated to occupy about 60 to 70% of the sodium encapsulation hole 105 in consideration of volume expansion during liquefaction.
  • the sodium may be a sodium rod that is formed to extend along the length direction of the spark plug.
  • the sodium may be positioned 1.5-2.5 mm from the spark plug. In some of these embodiments, the sodium may be positioned 2 mm away from the spark plug.
  • the sodium rod may be 2.5-3.5 mm in diameter. In some of these embodiments, the sodium rod may be 3 mm in diameter.
  • the sodium inclusion hole may include a plurality of sodium inclusion holes, and the sodium may include a plurality of sodium inclusion holes each being encapsulated in the plurality of sodium inclusion holes.
  • the sodium inclusion pore may include 8-12 sodium inclusion pore, and the sodium may include 8-12 sodium inclusion in each of the 8-12 sodium inclusion pore.
  • the sodium filling holes may be arranged at equal intervals along a circumferential direction with respect to (a center line of the spark plug).
  • the sodium is sealed at an optimal position between the spark plug and the water jacket, the separation distance between the spark plug and the sodium is optimized, and the shape, size, number and arrangement of the sodium are controlled at the same time. By optimizing, it was confirmed that the knocking phenomenon of the engine could be significantly reduced.
  • the engine controller When the engine is operated, the engine controller (ECU) gives a signal to the ignition device in an optimal state, so that ignition occurs and combustion proceeds.
  • the temperature of the combustion chamber 1 and the spark plug 200 rises, and when the temperature rises above the reference value, abnormal combustion (knocking) may occur due to hot spots around the spark plug 200 before the ignition signal of the ECU. have.
  • the conventional cylinder head there is a limit to lowering the temperature of the hot spot around the spark plug 200 that causes the knocking phenomenon of the engine only with the water jacket, and thus there is a limit that there is a possibility that the knocking phenomenon due to high heat is caused.
  • Even an engine having a structure in which sodium is sealed in a position other than the optimal position proposed by the present disclosure, such as the inside of the cylinder block or the inside of the exhaust valve has a limit in preventing the knocking phenomenon of the engine.
  • metallic sodium 300 is encapsulated around the spark plug 200 of the cylinder head of the spark ignition engine, and when the temperature around the spark plug 200 is about 97 ° C. or higher, metallic sodium ( As the liquid 300 is liquefied, the temperature around the spark plug 200 is lowered by absorbing heat around the spark plug 200 . The heat absorbed by the sodium 300 is again transferred to the cooling water inside the water jacket, and the cooling water may radiate heat through the radiator while circulating the cooling water passage 101 . When the sodium 300 is sealed, the temperature around the spark plug 200 can be lowered by up to 100° C. compared to the existing temperature, and accordingly, abnormal combustion of the engine can be reduced, so that the performance and fuel efficiency of the engine can be expected to be improved.

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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

An engine cylinder head forming a combustion chamber (1) together with a cylinder block may comprise: a cylinder head body (100) having an ignition plug insertion hole (103) into which an ignition plug (200) is inserted, a cooling water passage (101), in which cooling water flows, formed adjacently to the ignition plug insertion hole (103), and a sodium-sealed hole (105) formed between the ignition plug insertion hole (103) and the cooling water passage (101); the ignition plug (200) inserted into the ignition plug insertion hole (103) such that one end thereof protrudes into the combustion chamber (1); and sodium metal (300) sealed in the sodium-sealed hole (105). The sodium can be located at a position spaced 1.5-2.5 mm from the ignition plug. The sodium can be a sodium rod extending in the longitudinal direction of the ignition plug. The diameter of the sodium rod can be 2.5-3.5 mm. The sodium-sealed hole includes 8-12 sodium-sealed holes, the sodium includes 8-12 sodium pieces sealed in the 8-12 sodium-sealed holes, respectively, and the sodium-sealed holes can be arranged at equal intervals in the circumferential direction around the ignition plug.

Description

나트륨 봉입 실린더 헤드Sodium filled cylinder head
본 발명은 불꽃점화(SI, Spark Ignition) 엔진의 연소실을 구성하는 실린더헤드의 점화 플러그 주변에 나트륨을 일부 봉입하여 엔진의 노킹 현상을 방지하는 실린더 헤드 구조에 관한 것이다.The present invention relates to a cylinder head structure that prevents knocking of an engine by partially encapsulating sodium around a spark plug of a cylinder head constituting a combustion chamber of a spark ignition (SI) engine.
도 1은 점화 플러그(200)가 설치된 종래의 실린더 헤드의 구조를 개략적으로 보여주는 도면이고, 도 2는 도 1의 실린더 헤드의 점화 플러그(200) 및 그 주변 영역을 확대한 도면이다.FIG. 1 is a diagram schematically showing the structure of a conventional cylinder head in which a spark plug 200 is installed, and FIG. 2 is an enlarged view of the spark plug 200 of the cylinder head of FIG. 1 and a surrounding area thereof.
불꽃점화 엔진의 작동이 시작되면 연료의 연소열로 인하여 연소실(1)을 둘러싸는 실린더 블럭 및 실린더 헤드의 온도가 급격하게 상승하게 된다. 종래의 엔진에서는 온도가 허용치 이상으로 상승하는 것을 방지하기 위하여 실린더 블럭 및 실린더 헤드의 내부에 냉각수 통로(워터 자켓)(101)을 형성하고, 냉각수를 그 냉각수 통로(101)를 통하여 순환시킴으로써 엔진의 온도 상승을 방지하고 있다.When the operation of the spark ignition engine is started, the temperature of the cylinder block and the cylinder head surrounding the combustion chamber 1 is rapidly increased due to the combustion heat of the fuel. In a conventional engine, a coolant passage (water jacket) 101 is formed inside the cylinder block and cylinder head to prevent the temperature from rising above an allowable value, and the coolant is circulated through the coolant passage 101 to the engine. Prevents temperature rise.
또한, 워터 자켓만으로 충분한 냉각 효과를 얻는데 부족함이 있어, 워터 자켓에 더하여, 실린더 블록이나 배기 밸브의 내부에 나트륨을 봉입하여 실린더 블록이나 배기 밸브의 온도를 낮추고자 하는 시도가 있어 왔다.In addition, since there is a lack of sufficient cooling effect with only the water jacket, there have been attempts to lower the temperature of the cylinder block or the exhaust valve by sealing sodium in the cylinder block or the exhaust valve in addition to the water jacket.
그러나, 이러한 종래의 엔진 구조로는 엔진의 노킹 현상을 효과적으로 방지할 수 없는 문제점이 있었다. However, there is a problem that the knocking phenomenon of the engine cannot be effectively prevented with such a conventional engine structure.
본 개시물은 종래 기술의 문제점을 보완하기 위하여 엔진의 노킹 현상을 방지하기 위한 최적의 위치에 나트륨을 봉입하여 엔진의 노킹 현상을 줄이는데 그 목적이 있다.An object of the present disclosure is to reduce the knocking phenomenon of the engine by encapsulating sodium in an optimal position for preventing the knocking phenomenon of the engine in order to compensate for the problems of the prior art.
상기한 목적을 달성하기 위하여, 본 개시물은, 실린더 블록과 함께 연소실을 형성하는 엔진의 실린더 헤드로서, 점화 플러그가 삽입되는 점화 플러그 삽입공과, 상기 점화 플러그 삽입공과 인접하게 형성되고 내부에 냉각수가 흐르는 냉각수 통로와 상기 점화 플러그 삽입공과 상기 냉각수 통로의 사이에 형성되는 나트륨 봉입공을 갖는 실린더 헤드 바디와, 일단이 상기 연소실 내부로 돌출되게 상기 점화 플러그 삽입공에 삽입되는 점화 플러그와, 상기 나트륨 봉입공에 봉입되는 금속 나트륨을, 포함하는, 엔진의 실린더 헤드를 제공할 수 있다.In order to achieve the above object, the present disclosure provides a cylinder head of an engine that forms a combustion chamber together with a cylinder block, a spark plug insertion hole into which a spark plug is inserted, and a spark plug insertion hole formed adjacent to the spark plug insertion hole and provided with a coolant therein. A cylinder head body having a flowing coolant passage and a sodium sealing hole formed between the spark plug insertion hole and the coolant passage, a spark plug inserted into the spark plug insertion hole so that one end protrudes into the combustion chamber; It is possible to provide a cylinder head of an engine comprising metallic sodium encapsulated in a ball.
어떠한 실시예들에서, 상기 점화 플러그로부터 1.5~2.5 mm 이격된 위치에 상기 나트륨이 위치될 수 있다. In some embodiments, the sodium may be positioned 1.5-2.5 mm apart from the spark plug.
어떠한 실시예들에서, 상기 나트륨은 상기 점화 플러그의 길이 방향을 따라 연장되게 형성되는 나트륨 봉일 수 있다. In some embodiments, the sodium may be a sodium rod extending along a length direction of the spark plug.
어떠한 실시예들에서, 상기 나트륨 봉은 직경이 2.5~3.5 mm일 수 있다. In some embodiments, the sodium rod may be 2.5-3.5 mm in diameter.
어떠한 실시예들에서, 상기 나트륨 봉입공은 8~12 개의 나트륨 봉입공을 포함하고, 상기 나트륨은 상기 8~12 개의 나트륨 봉입공에 각각 봉입되는 8~12 개의 나트륨을 포함하고, 상기 나트륨 봉입공은 상기 점화 플러그를 중심으로 하는 원주 방향을 따라 등간격으로 배치될 수 있다.In some embodiments, the sodium inclusion pore includes 8-12 sodium filling pore, the sodium includes 8-12 sodium filling in each of the 8-12 sodium filling pore, and the sodium filling pore includes may be arranged at equal intervals along a circumferential direction with respect to the spark plug as a center.
상기한 구성에 따르면, 본 개시물은 엔진의 노킹 현상을 방지하기 위한 최적의 위치인 점화 플러그와 워터 자켓의 사이에 나트륨을 봉입하여, 점화 플러그의 주변의 고열을 나트륨이 흡수하도록 하고, 그 흡수된 열은 다시 워터 자켓의 냉각수에 전달되도록 함으로써, 엔진의 노킹 현상을 줄일 수 있는 효과가 있다. According to the above configuration, the present disclosure encapsulates sodium between the spark plug and the water jacket, which is an optimal position for preventing engine knocking, so that the high heat around the spark plug is absorbed by the sodium, and the absorption thereof By allowing the generated heat to be transferred back to the coolant of the water jacket, it is possible to reduce the knocking phenomenon of the engine.
도 1은 점화 플러그가 설치된 종래의 실린더 헤드의 구조를 개략적으로 보여주는 도면이다. 1 is a view schematically showing the structure of a conventional cylinder head in which a spark plug is installed.
도 2는 도 1의 실린더 헤드의 점화 플러그 및 그 주변 영역을 확대한 도면이다.FIG. 2 is an enlarged view of a spark plug of the cylinder head of FIG. 1 and a surrounding area thereof;
도 3은 본 개시물의 일 실시예에 따른 실린더 헤드의 점화 플러그 및 그 주변 영역을 확대한 도면이다. 3 is an enlarged view of a spark plug of a cylinder head and a peripheral area thereof according to an embodiment of the present disclosure;
도 4는 도 3의 A-A 단면도이다.FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 .
이하, 첨부 도면을 참조하여 본 개시물의 실시예를 상세히 설명한다.Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
본 개시물은 엔진의 노킹 현상을 방지하기 위하여 온도 컨트롤이 요구되는 최적의 지점이 점화 플러그(200)와 워터 자켓의 사이의 위치임을 알아내고, 그 최적의 위치에 나트륨(300)을 봉입하여 엔진의 노킹을 최소화할 수 있도록 한 것에 특징이 있다. The present disclosure finds out that the optimum point at which temperature control is required in order to prevent engine knocking is the location between the spark plug 200 and the water jacket, and encapsulates the sodium 300 at the optimum location for the engine It is characterized by minimizing knocking of
도 3은 본 개시물의 일 실시예에 따른 실린더 헤드의 점화 플러그(200) 및 그 주변 영역을 확대한 도면이고, 도 4는 도 3의 A-A 단면도이다. 3 is an enlarged view of the spark plug 200 of the cylinder head and a peripheral area thereof according to an embodiment of the present disclosure, and FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 .
어떠한 실시예들에서, 실린더 헤드는 실린더 헤드 바디(100)를 포함할 수 있다. 실린더 헤드 바디(100)는 실린더 블록 바디와 함께 연소실(1)을 형성할 수 있다. 실린더 헤드 바디(100)에는 점화 플러그(200)가 삽입되는 점화 플러그 삽입공(103)과, 상기 점화 플러그 삽입공(103)과 인접하게 형성되고 내부에 냉각수가 흐르는 냉각수 통로(워터 자켓)(101)와 상기 점화 플러그 삽입공(103)과 상기 냉각수 통로(101)의 사이에 형성되는 나트륨 봉입공(105)이 형성될 수 있다. In some embodiments, the cylinder head may include a cylinder head body 100 . The cylinder head body 100 may form the combustion chamber 1 together with the cylinder block body. The cylinder head body 100 has a spark plug insertion hole 103 into which the spark plug 200 is inserted, and a coolant passage (water jacket) 101 formed adjacent to the spark plug insertion hole 103 and through which coolant flows therein. ) and a sodium sealing hole 105 formed between the spark plug insertion hole 103 and the coolant passage 101 may be formed.
점화 플러그(200)는, 일단이 연소실(1) 내부로 돌출되도록 점화 플러그 삽입공(103)에 삽입 설치될 수 있다. 점화 플러그(200)는 스파크를 일으켜 압축된 공기와 혼합된 연료를 점화시켜 혼합기가 폭발하도록 한다. The spark plug 200 may be inserted and installed into the spark plug insertion hole 103 so that one end protrudes into the combustion chamber 1 . The spark plug 200 causes a spark to ignite the fuel mixed with the compressed air to cause the mixer to explode.
엔진은, 냉각수 통로(101)를 통하여 냉각수를 순환시키기 위하여, 냉각수의 열에너지를 외부로 방열하는 라디에이터(미도시)와 냉각수를 강제로 순환시키는 워터 펌프(미도시)를 포함할 수 있다.The engine may include a radiator (not shown) that radiates heat energy of the coolant to the outside and a water pump (not shown) that forcibly circulates the coolant in order to circulate the coolant through the coolant passage 101 .
나트륨 봉입공(105)에는 금속 나트륨(300)이 봉입될 수 있다. 어떠한 실시예들에서, 금속 나트륨(300)은, 액화 시 부피 팽창을 고려하여, 나트륨 봉입공(105)의 약 60~70%를 차지하도록 봉입될 수 있다. Metal sodium 300 may be encapsulated in the sodium encapsulation hole 105 . In some embodiments, the metallic sodium 300 may be encapsulated to occupy about 60 to 70% of the sodium encapsulation hole 105 in consideration of volume expansion during liquefaction.
어떠한 실시예들에서, 나트륨은 점화 플러그의 길이 방향을 따라 연장되게 형성되는 나트륨 봉일 수 있다.In some embodiments, the sodium may be a sodium rod that is formed to extend along the length direction of the spark plug.
어떠한 실시예들에서, 점화 플러그로부터 1.5~2.5 mm 이격된 위치에 나트륨이 위치될 수 있다. 이러한 실시예들 중 어떠한 실시예들에서, 점화 플러그로부터 2 mm 이격된 위치에 나트륨이 위치될 수 있다.In some embodiments, the sodium may be positioned 1.5-2.5 mm from the spark plug. In some of these embodiments, the sodium may be positioned 2 mm away from the spark plug.
어떠한 실시예들에서, 나트륨 봉은 직경이 2.5~3.5 mm일 수 있다. 이러한 실시예들 중 어떠한 실시예들에서, 나트륨 봉은 직경이 3 mm일 수 있다.In some embodiments, the sodium rod may be 2.5-3.5 mm in diameter. In some of these embodiments, the sodium rod may be 3 mm in diameter.
어떠한 실시예들에서, 나트륨 봉입공은 복수 개의 나트륨 봉입공을 포함하고, 나트륨은 복수 개의 나트륨 봉입공에 각각 봉입되는 복수 개의 나트륨을 포함할 수 있다. 이러한 실시예들 중 어떠한 실시예들에서, 나트륨 봉입공은 8~12 개의 나트륨 봉입공을 포함하고, 나트륨은 8~12 개의 나트륨 봉입공에 각각 봉입되는 8~12 개의 나트륨을 포함할 수 있다. In some embodiments, the sodium inclusion hole may include a plurality of sodium inclusion holes, and the sodium may include a plurality of sodium inclusion holes each being encapsulated in the plurality of sodium inclusion holes. In some of these embodiments, the sodium inclusion pore may include 8-12 sodium inclusion pore, and the sodium may include 8-12 sodium inclusion in each of the 8-12 sodium inclusion pore.
나트륨 봉입공은 점화 플러그(의 중심선)를 중심으로 하는 원주 방향을 따라 등간격으로 배치될 수 있다.The sodium filling holes may be arranged at equal intervals along a circumferential direction with respect to (a center line of the spark plug).
이와 같이, 본 개시물에서는, 점화 플러그와 워터 자켓의 사이의 최적의 위치에 나트륨을 봉입함과 아울러, 점화 플러그와 나트륨 사이의 이격 거리를 최적화하고, 동시에 나트륨의 형상, 사이즈, 개수 및 배치를 최적화함으로써, 엔진의 노킹 현상을 현저히 낮출 수 있음을 확인하였다. As such, in the present disclosure, the sodium is sealed at an optimal position between the spark plug and the water jacket, the separation distance between the spark plug and the sodium is optimized, and the shape, size, number and arrangement of the sodium are controlled at the same time. By optimizing, it was confirmed that the knocking phenomenon of the engine could be significantly reduced.
엔진이 작동되면 엔진 제어기(ECU)에서 최적의 상태에 점화장치에 신호를 주어 점화가 일어나고 연소가 진행된다. 연소가 진행되면 연소실(1) 및 점화플러그(200)의 온도가 올라가게 되고, 기준치 이상으로 온도가 올라가면 ECU의 점화 신호 전에 점화 플러그(200) 주변의 열점에 의해 이상 연소(Knocking)가 발생할 수 있다. 종래의 실린더 헤드에서는, 워터 자켓만으로, 엔진의 노킹 현상을 유발하는 점화 플러그(200) 주변의 열점의 온도를 낮추는데는 한계가 있으며, 따라서 고열에 의한 노킹 현상을 초래할 소지가 다분하다는 한계를 가지고 있었다. 실린더 블록 내부나 배기 밸브 내부 등 본 개시물에서 제안하는 최적의 위치 이외의 위치에 나트륨을 봉입한 구조의 엔진도 엔진의 노킹 현상을 방지하는데 한계가 있었다. When the engine is operated, the engine controller (ECU) gives a signal to the ignition device in an optimal state, so that ignition occurs and combustion proceeds. As combustion proceeds, the temperature of the combustion chamber 1 and the spark plug 200 rises, and when the temperature rises above the reference value, abnormal combustion (knocking) may occur due to hot spots around the spark plug 200 before the ignition signal of the ECU. have. In the conventional cylinder head, there is a limit to lowering the temperature of the hot spot around the spark plug 200 that causes the knocking phenomenon of the engine only with the water jacket, and thus there is a limit that there is a possibility that the knocking phenomenon due to high heat is caused. . Even an engine having a structure in which sodium is sealed in a position other than the optimal position proposed by the present disclosure, such as the inside of the cylinder block or the inside of the exhaust valve, has a limit in preventing the knocking phenomenon of the engine.
본 개시물의 일 실시예에 따르면, 불꽃 점화 엔진의 실린더 헤드의 점화 플러그(200) 주변에 금속 나트륨(300)을 봉입하고, 점화 플러그(200) 주변의 온도가 약 97℃ 이상이 되면 금속 나트륨(300)이 액화되면서 점화 플러그(200) 주변의 열을 흡수하여 점화 플러그(200) 주변의 온도를 낮추게 된다. 나트륨(300)에 흡수된 열은 다시 워터 자켓 내부의 냉각수에 전달되고, 냉각수는 냉각수 통로(101)를 순환하면서 열을 라디에이터를 통하여 방열할 수 있다. 나트륨(300) 봉입 시 점화 플러그(200) 주변 온도를 기존 온도 대비 최대 100℃ 정도를 낮출 수 있을 것으로 보이며 이에 따라 엔진의 이상연소를 줄일 수 있어서 엔진의 성능 및 연비 향상을 기대할 수 있다.According to one embodiment of the present disclosure, metallic sodium 300 is encapsulated around the spark plug 200 of the cylinder head of the spark ignition engine, and when the temperature around the spark plug 200 is about 97 ° C. or higher, metallic sodium ( As the liquid 300 is liquefied, the temperature around the spark plug 200 is lowered by absorbing heat around the spark plug 200 . The heat absorbed by the sodium 300 is again transferred to the cooling water inside the water jacket, and the cooling water may radiate heat through the radiator while circulating the cooling water passage 101 . When the sodium 300 is sealed, the temperature around the spark plug 200 can be lowered by up to 100° C. compared to the existing temperature, and accordingly, abnormal combustion of the engine can be reduced, so that the performance and fuel efficiency of the engine can be expected to be improved.
또한, 냉각 효율을 높여 고열에 의한 열융착 등에 의한 점화 플러그의 손상을 방지할 수 있는 부차적인 효과도 기대할 수 있다.In addition, a secondary effect of increasing the cooling efficiency to prevent damage to the spark plug due to thermal fusion due to high heat can be expected.

Claims (5)

  1. 실린더 블록과 함께 연소실을 형성하는 엔진의 실린더 헤드로서, A cylinder head of an engine forming a combustion chamber together with a cylinder block, comprising:
    점화 플러그가 삽입되는 점화 플러그 삽입공과, 상기 점화 플러그 삽입공과 인접하게 형성되고 내부에 냉각수가 흐르는 냉각수 통로와 상기 점화 플러그 삽입공과 상기 냉각수 통로의 사이에 형성되는 나트륨 봉입공을 갖는 실린더 헤드 바디와,A cylinder head body having a spark plug insertion hole into which the spark plug is inserted, a coolant passage formed adjacent to the spark plug insertion hole and through which coolant flows, and a sodium filling hole formed between the spark plug insertion hole and the coolant passage;
    일단이 상기 연소실 내부로 돌출되게 상기 점화 플러그 삽입공에 삽입되는 점화 플러그와, a spark plug inserted into the spark plug insertion hole so that one end protrudes into the combustion chamber;
    상기 나트륨 봉입공에 봉입되는 나트륨을, 포함하는, Containing sodium, which is enclosed in the sodium sealing hole,
    엔진의 실린더 헤드. the cylinder head of the engine.
  2. 제1 항에 있어서,The method of claim 1,
    상기 점화 플러그로부터 1.5~2.5 mm 이격된 위치에 상기 나트륨이 위치되는,The sodium is located at a position spaced 1.5 to 2.5 mm from the spark plug,
    엔진의 실린더 헤드. the cylinder head of the engine.
  3. 제1 항에 있어서,The method of claim 1,
    상기 나트륨은 상기 점화 플러그의 길이 방향을 따라 연장되게 형성되는 나트륨 봉인, The sodium is a sodium seal formed to extend along the longitudinal direction of the spark plug,
    엔진의 실린더 헤드. the cylinder head of the engine.
  4. 제3 항에 있어서,4. The method of claim 3,
    상기 나트륨 봉은 직경이 2.5~3.5 mm인,The sodium rod has a diameter of 2.5 to 3.5 mm,
    엔진의 실린더 헤드.the cylinder head of the engine.
  5. 제1 항에 있어서,The method of claim 1,
    상기 나트륨 봉입공은 8~12 개의 나트륨 봉입공을 포함하고, The sodium inclusion hole includes 8 to 12 sodium inclusion holes,
    상기 나트륨은 상기 8~12 개의 나트륨 봉입공에 각각 봉입되는 8~12 개의 나트륨을 포함하고,The sodium contains 8-12 sodium that is respectively enclosed in the 8-12 sodium sealing hole,
    상기 나트륨 봉입공은 상기 점화 플러그를 중심으로 하는 원주 방향을 따라 등간격으로 배치되는, The sodium sealing holes are arranged at equal intervals along the circumferential direction with respect to the spark plug,
    엔진의 실린더 헤드. the cylinder head of the engine.
PCT/KR2021/005674 2021-05-06 2021-05-06 Sodium-sealed cylinder head WO2022234872A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR980002681A (en) * 1996-06-29 1998-03-30 양재신 Anti knocking device for automobiles
KR19980029077A (en) * 1996-10-25 1998-07-15 박병재 Cylinder block chiller using sodium rod
KR19980030554U (en) * 1996-11-29 1998-08-17 양재신 Cylinder head of internal combustion engine with improved cooling performance
KR19980040952U (en) * 1996-12-23 1998-09-15 박병재 Cooling structure of cylinder head
KR19980054591U (en) * 1996-12-31 1998-10-07 박병재 Cooling structure of cylinder block

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR980002681A (en) * 1996-06-29 1998-03-30 양재신 Anti knocking device for automobiles
KR19980029077A (en) * 1996-10-25 1998-07-15 박병재 Cylinder block chiller using sodium rod
KR19980030554U (en) * 1996-11-29 1998-08-17 양재신 Cylinder head of internal combustion engine with improved cooling performance
KR19980040952U (en) * 1996-12-23 1998-09-15 박병재 Cooling structure of cylinder head
KR19980054591U (en) * 1996-12-31 1998-10-07 박병재 Cooling structure of cylinder block

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