KR20050081037A - Cross section of second spool for spark ignition coil - Google Patents
Cross section of second spool for spark ignition coil Download PDFInfo
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- KR20050081037A KR20050081037A KR1020040009270A KR20040009270A KR20050081037A KR 20050081037 A KR20050081037 A KR 20050081037A KR 1020040009270 A KR1020040009270 A KR 1020040009270A KR 20040009270 A KR20040009270 A KR 20040009270A KR 20050081037 A KR20050081037 A KR 20050081037A
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- spool
- coil
- secondary spool
- primary
- cross
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 239000004593 Epoxy Substances 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 10
- 230000035515 penetration Effects 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7401—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using panels without a frame or supporting posts, with or without upper or lower edge locating rails
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/72—Non-load-bearing walls of elements of relatively thin form with respect to the thickness of the wall
- E04B2/721—Non-load-bearing walls of elements of relatively thin form with respect to the thickness of the wall connections specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/82—Removable non-load-bearing partitions; Partitions with a free upper edge characterised by the manner in which edges are connected to the building; Means therefor; Special details of easily-removable partitions as far as related to the connection with other parts of the building
- E04B2/825—Removable non-load-bearing partitions; Partitions with a free upper edge characterised by the manner in which edges are connected to the building; Means therefor; Special details of easily-removable partitions as far as related to the connection with other parts of the building the connection between the floor and the ceiling being achieved without any restraining forces acting in the plane of the partition
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2002/749—Partitions with screw-type jacks
- E04B2002/7492—Partitions with screw-type jacks used in partitions extending from floor to ceiling
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
본 발명은 코어와 1,2차스풀 및 1,2차코일로 구성되어 스파크 플러그상에 불꽃방전을 일으켜 연소실내에서 압축된 혼합가스를 연소할 수 있는 고전압을 발생시켜주는 자동차 점화코일를 구성하면서 2차스풀의 외경에 2차코일을 권선하는데 있어서, 상기 2차스풀과 2차코일이 서로 밀접하게 접촉하면서 상기 2차스풀과 2차코일사이에 에폭시 절연수지 침투력을 증가시키기 위하여 상기 2차스풀의 외경에 다수개의 요철홈과 표면을 거칠게 하도록 하는 구성을 제공하는데 있다. The present invention is composed of the core, the first and second primary spool and the first and second coils to generate a spark discharge on the spark plug to generate a high voltage that can burn the compressed gas mixed in the combustion chamber 2 In winding the secondary coil to the outer diameter of the chaspool, the secondary spool and the secondary coil of the secondary spool to increase the penetration force of the epoxy insulating resin between the secondary spool and the secondary coil while in close contact with each other It is to provide a configuration to roughen a plurality of grooves and surfaces in the outer diameter.
이는 점화코일의 성능 및 내구성을 향상시키고자 2차스풀과 2차코일사이의 접촉력이 밀접하도록 2차스풀의 외경의 단면형상을 제공하는 것이다. This is to provide a cross-sectional shape of the outer diameter of the secondary spool so that the contact force between the secondary spool and the secondary coil is in close contact to improve the performance and durability of the ignition coil.
Description
본 발명은 코어와 1,2차스풀 및 1,2차코일로 구성되어 스파크 플러그상에 불꽃방전을 일으켜 연소실내에서 압축된 혼합가스를 연소할 수 있는 고전압을 발생시켜주는 자동차 점화코일을 구성하면서 2차스풀의 외경에 2차코일을 권선하는데 있어서, 상기 2차스풀과 2차코일이 서로 밀접하게 접촉하면서 상기 2차스풀과 2차코일사이에 침투력을 증가시키기 위하여 상기 2차스풀의 외경에 다수개의 요철홈형상을 제공하는데 있다. The present invention is composed of a core, a first and second primary spool and a primary and secondary coil to generate a spark discharge on the spark plug to generate a high voltage that can burn the compressed gas mixed in the combustion chamber while In winding the secondary coil to the outer diameter of the secondary spool, the secondary spool and the secondary coil in close contact with each other to increase the penetration force between the secondary spool and the secondary coil to the outer diameter of the secondary spool It is to provide a plurality of uneven groove shape.
일반적으로 열기관은 열에너지를 기계적인 일로 바꾸는 장치이며, 열에너지를 기계적인 일로 바꾸기 위해 사용되는 작동유체에 열에너지를 공급하는 방식에 따라 내연기관과 외연기관으로 크게 구별된다. 이 중 내연기관은 기관의 내부에서 연소가 이루어지며 가솔린등의 연료와 청정한 공기으 혼합체인 연료혼합기 자체가 보유하는 화학적 에너지를 연소에 의해 열에너지로 바꾸어 그 연소가스가 팽창할 때의 일을 직접 이용하는 기관이다. In general, a heat engine is a device that converts thermal energy into mechanical work, and is classified into an internal combustion engine and an external combustion engine according to a method of supplying thermal energy to a working fluid used to convert thermal energy into mechanical work. The internal combustion engine burns inside the engine and converts the chemical energy held by the fuel mixer itself, which is a mixture of fuel such as gasoline and clean air, into thermal energy by combustion to directly use the work when the combustion gas expands. It is an organ.
이러한 내연기관은 작동방식에 따라 4 사이클기관과 2 사이클가관으로 대별되며 4사이클기관의 경우 흡입,압축,연소,배기의 1사이클을 크랭크샤프트의 2회전 즉, 피스톤의 4행정으로 이루어지는 기관이다.These internal combustion engines are classified into four-cycle engines and two-cycle pipes according to the operating method. In the case of four-cycle engines, one cycle of suction, compression, combustion, and exhaust is composed of two rotations of the crankshaft, that is, four strokes of the piston.
이때에 전기점화식 내연기관의 상기 압축행정 후 연소행정에서 연료혼합기를 전기적 불꽃(SPARK)으로 착화, 연소시키기 위한 장치로써 점화플러그(SPARK PLUGS)가 이용되고 있다.At this time, spark plugs (SPARK PLUGS) are used as a device for igniting and combusting a fuel mixer with an electrical spark in a combustion stroke after the compression stroke of an electric ignition type internal combustion engine.
엔진의 전장품은 엔진을 시동하기 위한 시동장치, 점화플러그에 전기불꽃을 점화함과 동시에 엔진출력을 적절히 하기 위한 점화장치 및 배터리를 적절히 충전하기 위한 충전장치로 구성되어 있다. 이들 장치는 어느 것이나 엔진의 원활한 시동 및 회전에 필수구성장치이며, 또한 배기가스 정화장치의 정상적인 작동에도 밀접한 관계를 가지고 있다.The electrical equipment of the engine is composed of a starting device for starting the engine, an ignition device for igniting an electric flame on the spark plug, and a charging device for properly charging the battery. All of these devices are essential components for the smooth start and rotation of the engine and are closely related to the normal operation of the exhaust gas purification device.
자동차용 가솔린 엔진의 점화장치로서는 초기에 고속회전성능이 우수한 고압 마그네트방식이 채용되었으나, 그 후 시동능력이 양호한 배터리 점화장치을 사용하게 되었다. As a ignition device for a gasoline engine for automobiles, a high-pressure magnet method having excellent high-speed rotation performance was adopted at first, but a battery ignition device with good starting capability was used after that.
상기와 같은 점화장치의 구성요소를 살펴보면 점화플러그(ignition switch), 배전기(distribution)와 점화플러그(spark plug)로 구성되어 있다. 상기 점화스위치는 운전석에 부착되어 있으며, 점화장치 회로에 전류를 단속하여 엔진을 시동하거나 정지시킨다.Looking at the components of such an ignition device is composed of an ignition plug (ignition switch), a distribution (distribution) and a spark plug (spark plug). The ignition switch is attached to the driver's seat and starts or stops the engine by regulating a current in the ignition circuit.
상기 점화코일은 점화플러그의 불꽃간극에 강한 불꽃이 튀도록 배터리나 발전기의 저압을 고전압으로 변경시키는 유도코일이다.The ignition coil is an induction coil for changing a low voltage of a battery or a generator to a high voltage so that a strong flame splashes in a spark gap of a spark plug.
상기 배전기는 점화코일이 고전압을 적절한 시기에 발생하도록 1차회로의 전류를 단속하는 스위치의 기능과 발생한 고전압을 각 실린더의 점화플러그로 분배하는 작용을 한다.The distributor serves to distribute a high voltage to the spark plug of each cylinder and a function of a switch to control the current of the primary circuit so that the ignition coil generates a high voltage at an appropriate time.
상기 점화플러그는 연소실에 나사로 죄어 넣고 고전압이 가해 졌을때 불꽃에 불꽃을 튀겨 연소실내에 압축된 혼합가스를 점화시킨다.The spark plug is screwed into the combustion chamber, and when a high voltage is applied, the spark plug ignites the flame to ignite the compressed gas mixed in the combustion chamber.
상기 점화코일장치의 동작은 다음과 같다.The operation of the ignition coil device is as follows.
내연기관의 제어장치로부터의 점화제어신호는 IGBT의입력신호로서 베이스로부터 에미터로의 베이스전류를 단속하는 것으로 상기 베이스 전류의 출력으로서 콜렉터로부터 에미터로 전류를 흘리려면 , 즉 전원인 배터리로부터 점화코일의 1차코일에 전류를 흘려 자계를 발생시킨다. The ignition control signal from the control device of the internal combustion engine is an input signal of the IGBT that interrupts the base current from the base to the emitter, so that the current flows from the collector to the emitter as the output of the base current, that is, from the battery which is the power source. A magnetic field is generated by passing a current through the primary coil of the coil.
점화플러그의 점화에 있어서는 상기 제어장치로부터의 상기 IGBT로의 점화신호에 의해 상기 1차코일로의 전류를 끊음으로써 상기 1차코일의 자계를 0으로 하여 1차측에 큰 전압의 기전력을 발생시키고, 상기 기전력의 발생에 의에 상기 점화코일의 2차코일에 더욱 높은 전압을 발생시켜 점화플러그를 스파크시킨다. In the ignition of the spark plug, by cutting off the current to the primary coil by the ignition signal from the control device to the IGBT, the magnetic field of the primary coil is zero, and a large voltage electromotive force is generated on the primary side. By generating electromotive force, a higher voltage is generated on the secondary coil of the ignition coil to spark the spark plug.
도 1은 일반적인 점화코일의 단면을 나타낸 개략도로서, 코어(1)가 그 중심에 위치하며, 상기 코어의 외주에는 2차스풀(2)이 끼워지고, 상기 2차스풀(2)의 외주에는 에나멜선등으로 이루어지는 2차코일(3)이 권층되어 있다. 또한, 상기 2차스풀(2)의 외측에는 1차스풀(5)이 끼워지고, 상기 1차스풀(5)의 외주에는 1차코일(6)이 권층되어 있다. 1 is a schematic view showing a cross section of a general ignition coil, in which a core 1 is located at the center thereof, a secondary spool 2 is fitted to an outer circumference of the core, and an enamel is formed on an outer circumference of the secondary spool 2. The secondary coil 3 which consists of wires is wound. Further, the primary spool 5 is fitted to the outside of the secondary spool 2, and the primary coil 6 is wound around the outer circumference of the primary spool 5.
상기 2차코일(3)과 1차스풀(5)사이에는 레진(4)이 형성되어 2차코일(3)과 1차코일(6)은 서로 분리되어 있다. A resin 4 is formed between the secondary coil 3 and the primary spool 5 so that the secondary coil 3 and the primary coil 6 are separated from each other.
상기 점화코일에 대하여 상세하게 설명하면, 1차코일은 직경 0.4mm ~ 1.0mm의 전선을 200회정도 감아 놓았으며, 감기 시작은 +단자에, 감기 끝은 -단자에 연결되어 있다,In detail with respect to the ignition coil, the primary coil is wound around 200 times the wire of 0.4mm ~ 1.0mm diameter, the winding start is connected to the + terminal, the winding end is connected to the-terminal,
2차코일은 0.005mm~0,0008mm의 전선을 사용하여 코어상에 각 층마다 절연지를 넣어서 약 20,000회 감아 놓았으며 감기 시작은 1차코일의 감기 끝에 연결되어 1차코일에서 발생하는 자기유도전압을 2차전압에 가하도록 되어 있다. The secondary coil is wound around 20,000 times by inserting insulation paper on each core using the wire of 0.005mm ~ 0,0008mm, and the winding start is connected to the winding end of the primary coil and the magnetic induction voltage generated from the primary coil Is applied to the secondary voltage.
1차코일과 2차코일의 권선비는 60 ~ 100정도로 설계되어 있으며, 1차코일은 장기간 주행때 방열을 좋게 하기 위하여 2차코일의 바깥쪽에 감아 놓았다. 이들 2개의 코일은 철제의 케이스에 들어가 있으며, 코일과 케이스사이에 절연하기 위하여 절연수지가 채워져 있다. The winding ratio of the primary coil and the secondary coil is designed to be about 60 to 100, and the primary coil is wound on the outside of the secondary coil to improve heat dissipation when driving for a long time. These two coils are housed in an iron case and filled with insulating resin to insulate between the coil and the case.
이와 같이 상기 2차코일은 2차스풀의 외경에 20,000회 정도 권선되어 있으며, 권선 후에 상기 2차코일과 2차스풀이 서로 밀접하게 접촉되며, 2차코일이 다른 코일과의 절연을 유지하도록 에폭시를 침투시키고 있다. As described above, the secondary coil is wound about 20,000 times on the outer diameter of the secondary spool. After the winding, the secondary coil and the secondary spool are in close contact with each other, and the secondary coil is epoxy to maintain insulation from other coils. Is infiltrating.
도 2는 종래기술의 2차스풀의 단면을 나타낸 제1실시예로서, 2차스풀의 단면이 원형이면서 접촉면이 비록 거칠게 가공되어 있으나, 2차코일의 권선 후에 2차스풀과 2차코일사이에 에폭시를 침투하고자 할 때에 2차스풀의 깊숙한 내부까지 균일하게 침투하지 못하는 문제점을 안고 있다. Figure 2 is a first embodiment showing the cross-section of the secondary spool of the prior art, although the cross section of the secondary spool is circular and the contact surface is roughly processed, between the secondary spool and the secondary coil after the winding of the secondary coil When trying to penetrate the epoxy has a problem that does not evenly penetrate deep inside the secondary spool.
도 3은 종래기술의 2차스풀의 단면을 나타낸 제2실시예로서, 2차코일의 단면을 일정하게 각진 면을 형성하여 에폭시의 침투력을 증가시키도록 하였다. 이러한 경우에 도 2에 나타낸 실시예1 보다는 에폭시의 침투력이 향상되고 있으나, 2차스풀의 내부에 깊숙하게 균일한 에폭시의 침투력은 여전히 만족할 만한 효과를 보이지 않고 있는 실정이다. Figure 3 is a second embodiment showing the cross section of the secondary spool of the prior art, to form a constant angled cross section of the secondary coil to increase the penetration force of the epoxy. In this case, although the penetration force of the epoxy is improved compared to Example 1 shown in FIG. 2, the penetration force of the epoxy uniformly deep inside the secondary spool still does not show a satisfactory effect.
본 발명은 이러한 문제점을 해결하기 위하여 발명된 것으로서, 코어와 1,2차코일로 구성되어 스파크 플러그상에 불꽃방전을 일으켜 연소실내에서 압축된 혼합가스를 연소할 수 있는 고전압을 발생시켜주는 자동차 점화코일을 구성함에 있어서, 2차스풀의 외경에 2차코일을 권선 후에 에폭시를 2차스풀의 내부 깊숙이 균일하게 침투하도록 하는 2차스풀 외경의 단면형상을 제공하는데 있다. The present invention has been invented to solve this problem, the vehicle is composed of the core and the primary and secondary coils to generate a high voltage to burn the mixed gas compressed in the combustion chamber by generating a spark discharge on the spark plug In constructing the coil, after winding the secondary coil to the outer diameter of the secondary spool to provide a cross-sectional shape of the secondary spool outer diameter to allow the epoxy to penetrate uniformly deep inside the secondary spool.
이하 본 발명에 따른 점화코일용 2차스풀에 대하여 첨부된 도면을 참조하여 보다 상세히 설명하면 다음과 같다.Hereinafter, the secondary spool for the ignition coil according to the present invention will be described in detail with reference to the accompanying drawings.
도 4는 본 발명에 따른 2차스풀의 단면을 나타낸 개략도로서, 스파크플러그상에 불꽃방전을 일으켜 연소실내에서 압축된 혼합가스를 연소할 수 있는 고전압을 발생시켜주는 자동차 점화코일은 코어(1)가 그 중심에 위치하며, 상기 코어의 외주에는 2차스풀(2)이 끼워지고, 상기 2차스풀(2)의 외주에는 에나멜선등으로 이루어지는 2차코일(3)이 권층되어 있으며, 상기 2차스풀(2)의 외측에는 1차스풀(5)이 끼워지고, 상기 1차스풀(5)의 외주에는 1차코일(6)이 권층되도록 하되, 상기 2차스풀(2)의 외주면에 2차코일(3)이 다수회 권선 된 후에, 다른 코일과의 절연을 방지하기 위하여 에폭시를 내부 깊숙이 균일하게 침투시키기 위하여, 상기 2차스풀(2)의 외주면에 다수개의 요철홈을 형성하도록 하는 형상을 제공하는데 있다.4 is a schematic view showing a cross-section of a secondary spool according to the present invention, in which a spark discharge on a spark plug generates a high voltage capable of combusting a compressed gas mixed in a combustion chamber. Is located at the center thereof, the secondary spool (2) is fitted on the outer circumference of the core, the secondary coil (3) made of enameled wire or the like is wound on the outer circumference of the secondary spool (2). The primary spool 5 is fitted to the outside of the spool 2, and the primary coil 6 is wound around the outer circumference of the primary spool 5, but the secondary spool 2 is formed on the outer circumferential surface of the secondary spool 2. After the coil 3 has been wound a plurality of times, a shape of forming a plurality of uneven grooves on the outer circumferential surface of the secondary spool 2 to uniformly infiltrate the epoxy deep inside to prevent insulation from other coils. To provide.
즉, 본 발명은 2차스풀의 외주경에 다수개의 요철홈을 형성하도록 하여, 2차코일이 권선 된 후에, 에폭시를 침투하고자 할때에 상기 2차스풀의 내부 깊숙이 에폭시가 균일하게 침투하도록 하고자 하는 것이다.That is, the present invention is to form a plurality of grooves in the outer circumference of the secondary spool, so that when the secondary coil is wound, the epoxy deeply penetrates deeply inside the secondary spool to penetrate the epoxy. It is.
이상에서 설명한 바와 같이 본 발명에 따른 2차스풀의 단면형상은 2차코일이 권선 된 후에 에폭시와 같은 절연물질을 2차스풀의 외주면에 내부 깊숙이 균일하게 침투하도록 하여 다른 코일과의 접촉을 방지하여 완벽한 절연성능을 제공하는 것이다. As described above, the cross-sectional shape of the secondary spool according to the present invention allows the insulation material such as epoxy to penetrate deeply into the outer circumferential surface of the secondary spool after the secondary coil is wound, thereby preventing contact with other coils. It provides perfect insulation performance.
도 1은 일반적인 점화코일의 단면을 나타낸 개략도1 is a schematic view showing a cross section of a general ignition coil
도 2는 종래기술의 2차스풀의 단면을 나타낸 제1실시예.2 is a first embodiment showing a cross section of a secondary spool of the prior art;
도 3은 종래기술의 2차스풀의 단면을 나타낸 제2실시예.3 is a second embodiment showing a cross section of a secondary spool of the prior art;
도 4는 본 발명에 따른 2차스풀의 단면을 나타낸 개략도. Figure 4 is a schematic diagram showing a cross section of the secondary spool according to the present invention.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
1: 마그네트 코어 2: 2차스풀1: magnet core 2: secondary spool
3: 2차코일 4: 레진 3: secondary coil 4: resin
5: 1차스풀 6:1차코일5: Primary spool 6: Primary coil
10: 점화코일 10: Ignition Coil
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040009270A KR20050081037A (en) | 2004-02-12 | 2004-02-12 | Cross section of second spool for spark ignition coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040009270A KR20050081037A (en) | 2004-02-12 | 2004-02-12 | Cross section of second spool for spark ignition coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20050081037A true KR20050081037A (en) | 2005-08-18 |
Family
ID=37267735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020040009270A KR20050081037A (en) | 2004-02-12 | 2004-02-12 | Cross section of second spool for spark ignition coil |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20050081037A (en) |
-
2004
- 2004-02-12 KR KR1020040009270A patent/KR20050081037A/en not_active Application Discontinuation
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