JPS6221233B2 - - Google Patents
Info
- Publication number
- JPS6221233B2 JPS6221233B2 JP9190880A JP9190880A JPS6221233B2 JP S6221233 B2 JPS6221233 B2 JP S6221233B2 JP 9190880 A JP9190880 A JP 9190880A JP 9190880 A JP9190880 A JP 9190880A JP S6221233 B2 JPS6221233 B2 JP S6221233B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- spark plug
- convex portion
- center electrode
- conductive glass
- 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.)
- Expired
Links
- 239000011521 glass Substances 0.000 claims description 28
- 239000012212 insulator Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 230000002265 prevention Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Spark Plugs (AREA)
Description
【発明の詳細な説明】
この発明は、抵抗入り点火プラグに関し、雑音
電波障害の防止効果をより有効に改善したこの種
の点火プラグに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a resistor-containing spark plug, and relates to a spark plug of this type that more effectively improves the effect of preventing noise radio wave interference.
従来より点火プラグから発生する雑音電波を防
止するため、点火プラグの絶縁碍子の中空孔に導
電性ガラスを両端に介在して抵抗体を封着する、
いわゆるモノシリツクタイプの抵抗入り点火プラ
グが実用されている。 Conventionally, in order to prevent noise radio waves generated from a spark plug, conductive glass is interposed at both ends of the hollow hole of the insulator of the spark plug, and a resistor is sealed.
So-called monolithic type resistor-containing spark plugs are in practical use.
しかしながら、この種のモノシリツクタイプの
抵抗入り点火プラグは雑音防止効果が十分でない
ことが判つた。 However, it has been found that this type of monolithic resistor-containing spark plug does not have a sufficient noise prevention effect.
即ち、この点火プラグは第１図ａおよびｂに示
すように絶縁碍子１の中空孔１ａ内に鍔付き中心
電極２を挿入載置し、その鍔部の端面２ｃに形成
された凹部２ｄまたは凸部２d′が導電性ガラス３
と接し、その上に重ねて抵抗体４および導電性ガ
ラス３′が充填された後、加熱されてガラス質が
溶融軟化され端子電極５が加圧挿入されることに
より、前記中心電極と前記端子電極との間に導電
性ガラスを介して抵抗体がサンドイツチに封着さ
れている。 That is, as shown in FIGS. 1a and 1b, this spark plug has a flanged center electrode 2 inserted and placed in a hollow hole 1a of an insulator 1, and a concave portion 2d or a convex portion formed on an end surface 2c of the flanged portion. The portion 2d' is the conductive glass 3
After the resistor 4 and the conductive glass 3' are filled on top of the resistor 4 and conductive glass 3' are heated to melt and soften the glass and the terminal electrode 5 is inserted under pressure, the center electrode and the terminal A resistor is sealed to the sandwich gate with conductive glass interposed between it and the electrode.
ところが、このモノシリツクタイプの絶縁碍子
を切断して抵抗体部分の封着状態を調べてみる
と、抵抗体の上下に位置する導電性ガラスとの境
界面が放物線状に湾曲しており、この境界面の湾
曲することによつて抵抗体の実効長（実質的な長
さ）ｌが著しく短くなる。従つて上記のように抵
抗体の実効長が短縮されると抵抗体の実質的抵抗
値が減少し、特に雑音電波の発生源である容量放
電々流は周波数が高くなるに従つて電流密度が平
等とならず、表皮効果によりその電流の大部分が
抵抗体の絶縁碍子の中空孔内壁面に流れ易くなる
ため、雑音防止効果は十分に満足すべきものでは
なかつたのである。 However, when we cut this monolithic type insulator and examined the sealing condition of the resistor part, we found that the interface with the conductive glass located above and below the resistor was curved in a parabolic shape. Due to the curvature of the boundary surface, the effective length (substantive length) l of the resistor is significantly shortened. Therefore, as mentioned above, when the effective length of the resistor is shortened, the effective resistance value of the resistor decreases, and in particular, the current density of the capacitive discharge stream, which is the source of noise radio waves, increases as the frequency increases. Because the current is not equalized and most of the current tends to flow to the inner wall surface of the hollow hole of the insulator of the resistor due to the skin effect, the noise prevention effect was not fully satisfactory.
また、この抵抗体の湾曲化する要因としては絶
縁碍子１の中空孔１ａの内壁面における流動抵抗
が大きく、かつ中空孔の下部には中心電極２が嵌
合されていることから加圧方向に圧力が抜けきら
ないために球面状に凹むのである。 Also, the reason why this resistor is curved is that the flow resistance on the inner wall surface of the hollow hole 1a of the insulator 1 is large, and since the center electrode 2 is fitted in the lower part of the hollow hole, Because the pressure cannot be released completely, it becomes concave in a spherical shape.
本発明は上記の諸点に鑑み、抵抗体の実効長を
長めるように抵抗体と導電性ガラスとの境界面を
可及的にフラツトに形成し、雑音防止効果のより
大きい抵抗入り点火プラグの提供を目的とする。 In view of the above-mentioned points, the present invention forms the interface between the resistor and conductive glass as flat as possible so as to increase the effective length of the resistor, thereby creating a resistor-containing spark plug with greater noise prevention effect. For the purpose of providing.
即ち本発明は、中心電極の導電性ガラスに接す
る側の端面の中央に凸部を形成し、この凸部の頂
面が少なくとも抵抗体内に突出するように埋設し
たことを特徴とする抵抗入り点火プラグである。 That is, the present invention provides a resistor-containing ignition device, characterized in that a convex portion is formed at the center of the end surface of the center electrode in contact with the conductive glass, and the convex portion is buried so that at least the top surface of the convex portion projects inside the resistor. It's a plug.
以下本発明を図に示す実施例について説明す
る。第２図において、１は高アルミナ磁器から成
る絶縁碍子で、この絶縁碍子の中空孔１ａ（4.6
mmφ）の下部には中心電極１２を挿入するための
段座１ｂで区分された径小孔１ｃ（2.6mmφ）を
備えている。中心電極１２は絶縁碍子１の中空孔
１ａとその段差１ｂによつて係止される鍔１２ａ
と前記径小孔１ｃ内に挿通して突出する放電部１
２ｂとを備え、さらにこの鍔部１２ａの端面１２
ｃにはその中央に長められた凸部１２ｄが形成さ
れている。 The present invention will be described below with reference to embodiments shown in the drawings. In Fig. 2, 1 is an insulator made of high alumina porcelain, and the hollow hole 1a (4.6
mmφ) is provided with a small diameter hole 1c (2.6 mmφ) divided by a stepped seat 1b into which the center electrode 12 is inserted. The center electrode 12 has a flange 12a that is locked by the hollow hole 1a of the insulator 1 and its step 1b.
and a discharge portion 1 inserted into and projected into the small diameter hole 1c.
2b, and further includes an end surface 12 of this collar portion 12a.
c has an elongated convex portion 12d formed at its center.
３，３′は金属粉末とガラス粉末またはこれに
金属酸化物および金属炭化物を加えた導電性ガラ
スシール材であり、例えばCu40重量％、FeB10
重量％とガラス50重量％の混合したシール粉末で
ある。４はガラス質抵抗体で、例えば先に出願し
た特開昭53−107695の組成物であるガラス粉末30
〜70重量％と残りアルミナ、ジルコン、ムライト
および粘土等の骨材の混合粉末100重量部に対し
て、この骨材含有量のうち少なくとも0.1重量％
をSi3N4、AlN、BN等の非酸化物で置換し、これ
にメチルセルローズ、グリセリン等の水溶性炭質
物質の炭化後の炭素量0.5〜７重量部と、抵抗値
安定成分としてTiO2、NbO5、Ta2O5、ThO2およ
びLa2O3等の酸化物またはTiC、NbC、TaC、
WC、B4C、SiC等の炭化物のうち少なくとも１
種以上を０〜20重量部とを配合した抵抗体材料を
有利に用いることができる。 3 and 3' are conductive glass sealing materials made by adding metal powder and glass powder, or metal oxides and metal carbides; for example, Cu40% by weight, FeB10
It is a sealing powder that is a mixture of 50% by weight and 50% by weight of glass. 4 is a glass resistor, for example, glass powder 30, which is a composition disclosed in Japanese Patent Application Laid-Open No. 53-107695, which was previously filed.
~70% by weight and the remainder at least 0.1% by weight of this aggregate content for 100 parts by weight of mixed powder of aggregates such as alumina, zircon, mullite and clay.
is replaced with a non-oxide such as Si 3 N 4 , AlN, or BN, and added with 0.5 to 7 parts by weight of carbonized water-soluble carbonaceous material such as methyl cellulose or glycerin, and TiO 2 as a resistance value stabilizing component. , NbO 5 , Ta 2 O 5 , ThO 2 and La 2 O 3 etc. or TiC, NbC, TaC,
At least one of carbides such as WC, B 4 C, SiC, etc.
It is possible to advantageously use a resistor material containing 0 to 20 parts by weight of at least one of the following.
この抵抗体材料は上記導電性ガラス３に重ねて
充填され、同時に上記中心電極１２の凸部１２ｄ
の頂面１２ｅがこの抵抗体材料内に埋設されてい
る。３′は上記導電性ガラスと同じ材料で抵抗体
４上に充填されている。５は端子電極で導電性ガ
ラス３′に接する周部には簡単なねじ切りなどに
よつて回り止めが形成されている。 This resistor material is filled over the conductive glass 3, and at the same time the convex portion 12d of the center electrode 12 is filled.
The top surface 12e of is embedded within this resistor material. The resistor 4 is filled with the same material as the conductive glass 3'. Reference numeral 5 denotes a terminal electrode, and a rotation stopper is formed on the periphery of the terminal electrode in contact with the conductive glass 3' by simple thread cutting or the like.
本発明の抵抗入り点火プラグは絶縁碍子１の中
空孔１ａ内に中心電極１２を挿入すると共に導電
性ガラス粉末約0.2ｇを絶縁碍子の中空孔１ａ内
の中心電極上に約2000Kg／cm2の圧力で充填し、こ
の上に抵抗体粉末約0.35ｇとさらに導電性ガラス
粉末約0.2ｇを同様な圧力で充填したのち端子電
極５を挿入し、次に900〜1000℃の加熱下に端子
電極を直立荷重15Kg程度を加えて軟化状態にある
粉末材料中へ圧入することによつて両電極間に導
電封着される。この絶縁碍子は取付ねじを備えた
主体金具６に公知の仕様で組付け固定されて抵抗
入り点火プラグを得る。 In the resistor-containing spark plug of the present invention, the center electrode 12 is inserted into the hollow hole 1a of the insulator 1, and about 0.2 g of conductive glass powder is poured onto the center electrode in the hollow hole 1a of the insulator at a rate of about 2000 kg/cm 2 . After filling with pressure, about 0.35 g of resistor powder and about 0.2 g of conductive glass powder were filled with the same pressure, then the terminal electrode 5 was inserted, and then the terminal electrode was heated to 900 to 1000°C. By applying an upright load of about 15 kg and press-fitting it into the softened powder material, conductive sealing is achieved between both electrodes. This insulator is assembled and fixed to a metal shell 6 equipped with mounting screws according to known specifications to obtain a resistor-containing spark plug.
絶縁碍子１の中空孔１ａ内で導電性ガラスおよ
び抵抗体材料が加熱下において端子電極を介して
加圧されると、これら材料は軟化流動しつつ圧縮
される。しかし、絶縁碍子１の中空孔１ａの内壁
面は流動抵抗が大きく、これら材料の中心部分の
方が圧縮されることになる。また絶縁碍子１の中
空孔１ａの下部には中心電極１２が嵌合されてい
るため加圧方向に圧力が抜けず、従つてこれら材
料の中心部分の圧縮による体積変化分だけ絶縁碍
子１の中空孔１ａの内壁面に沿つて加圧方向と反
対方向にこれら材料を押し上げようとする。しか
し、本発明は中心電極１２の導電性ガラス３と接
する鍔部の端面１２ｃの中央には抵抗体４の内部
まで達する長さの凸部１２ｄが形成されており、
この中央が山形の凸部１２ｄが抵抗体内に突出す
ることにより、上記材料の中心部分の圧縮が少な
く、そのために体積変化も少なくなつて加圧方向
と反対方向に上記材料を押し上げようとする力は
減少する。従つて抵抗体と導電性ガラスとの境界
面における湾曲化は阻止され、比較的フラツトに
近い状態を有利に形成することができる。 When the conductive glass and the resistor material are heated and pressurized through the terminal electrodes within the hollow hole 1a of the insulator 1, these materials are compressed while softening and flowing. However, the inner wall surface of the hollow hole 1a of the insulator 1 has a large flow resistance, and the central portion of these materials is compressed. In addition, since the center electrode 12 is fitted in the lower part of the hollow hole 1a of the insulator 1, the pressure will not be released in the pressurizing direction, and therefore the hollow of the insulator 1 will be reduced by the volume change due to the compression of the central part of these materials. These materials try to be pushed up along the inner wall surface of the hole 1a in a direction opposite to the direction of pressurization. However, in the present invention, a convex portion 12d having a length reaching the inside of the resistor 4 is formed at the center of the end surface 12c of the flange portion of the center electrode 12 that is in contact with the conductive glass 3.
By protruding the convex portion 12d having a chevron-shaped center into the resistor, the central portion of the material is less compressed, and therefore the volume change is also reduced, resulting in a force that tries to push the material up in the opposite direction to the pressurizing direction. decreases. Therefore, curvature at the interface between the resistor and the conductive glass is prevented, and a relatively flat state can be advantageously formed.
こゝで中心電極１２の凸部１２ｄとしては、例
えば銅芯入りのニツケル合金外被から成る鍔部の
中央を延長して一体に形成することができまた鍔
部の端面１２ｃに耐熱性および熱伝導性良好な金
属材料を溶接、圧入等によつて接合したものでも
よい。さらに中心電極の凸部は抵抗体内部に深く
突出すると実効長が損われて雑音防止効果が悪く
なるので、この凸部のみ第４図に示すようにアル
ミナ、ムライト、シリカ等の電気絶縁性を有する
セラミツクまたはSiCなどの抵抗を有する材料、
さらには磁性材のフエライト等が使用され、これ
ら棒状材２２ｄを中心電極２２の鍔部２２ａの端
面２２ｃの凹部２２ｆに圧入等によつて接続され
たものでもよい。 Here, the convex portion 12d of the center electrode 12 can be integrally formed by extending the center of a flange made of a nickel alloy jacket with a copper core, and the end surface 12c of the flange can be formed with heat resistance and heat resistance. A metal material with good conductivity may be joined by welding, press-fitting, or the like. Furthermore, if the convex part of the center electrode protrudes deeply into the resistor, the effective length will be lost and the noise prevention effect will be impaired. materials with resistance, such as ceramics or SiC,
Furthermore, a magnetic material such as ferrite may be used, and the rod-shaped members 22d may be connected to the recessed portion 22f of the end surface 22c of the flange portion 22a of the center electrode 22 by press-fitting or the like.
なお、本発明の凸部の直径は絶縁碍子１の中空
孔１ａの直径の断面積の５〜75％程度であること
が湾曲化を阻止する上で望ましい。この範囲を外
れるものは凸部を抵抗体内まで延長しても湾曲化
は有効に阻止されず、雑音防止効果も劣る。 The diameter of the convex portion of the present invention is preferably about 5 to 75% of the cross-sectional area of the diameter of the hollow hole 1a of the insulator 1 in order to prevent bending. If it is outside this range, even if the convex portion is extended into the resistor body, curving will not be effectively prevented, and the noise prevention effect will be poor.
次に、本発明の抵抗入り点火プラグと第１図ｂ
に示すように凸部が極めて短い従来の抵抗入り点
火プラグとをSAEの規格に基づく雑音電界強度
の測定結果を第５図に示す。こゝで本発明抵抗入
り点火プラグＡは絶縁碍子の中空孔4.6mmφに対
して凸部の直径2.7mmφ×長さ６mmの第３図に示
すものであり、また本発明抵抗入り点火プラグＢ
は凸部にアルミナ磁器棒の直径2.7mmφ×長さ10
mmを有する第４図に示すものである。従来抵抗入
り点火プラグＣは凸部の直径2.7mmφ×長さ2.5mm
ものを用いた。この結果、本発明抵抗入り点火プ
ラグＡ、Ｂの両者は従来抵抗入り点火プラグと比
較して周波数全域にわたつて雑音レベルが低くな
つた。 Next, the resistor-containing spark plug of the present invention and FIG.
Figure 5 shows the measurement results of the noise field strength based on SAE standards for a conventional resistor-containing spark plug with an extremely short protrusion as shown in Figure 5. Here, the spark plug A containing a resistor of the present invention is shown in FIG. 3 with a convex portion having a diameter of 2.7 mmφ and a length of 6 mm with respect to the hollow hole of the insulator of 4.6 mmφ, and the spark plug B containing a resistor of the present invention is the one shown in FIG.
The convex part is alumina porcelain rod diameter 2.7mmφ x length 10
It is shown in FIG. 4 with mm. Conventional resistor-containing spark plug C has a convex diameter of 2.7 mmφ x length of 2.5 mm.
I used something. As a result, both the resistor-containing spark plugs A and B of the present invention had lower noise levels over the entire frequency range than the conventional resistor-containing spark plugs.
以上述べたように本発明は中心電極の端面の中
央に、抵抗体内に突出するように長められた凸部
を形成したことによつて、抵抗体と導電性ガラス
との境界面の湾曲化が阻止されてすぐれた雑音防
止効果を奏することができる。さらに抵抗体部分
の断面積が減少することから比抵抗の比較的小さ
い材料が使用でき、このため自己シール性を有す
る比抵抗の小さい低抵抗ガラスによる一体シール
を可能とし、製造が大巾に簡略して安価となる効
果を有する。 As described above, the present invention forms an elongated convex portion at the center of the end face of the center electrode so as to protrude into the resistor, thereby reducing the curvature of the interface between the resistor and the conductive glass. This can provide an excellent noise prevention effect. Furthermore, since the cross-sectional area of the resistor part is reduced, materials with relatively low resistivity can be used, making it possible to create an integral seal with low-resistivity glass that has a self-sealing property and greatly simplifies manufacturing. This has the effect of making it cheaper.
第１図ａ，ｂは従来抵抗入り点火プラグの要部
拡大断面図、第２図は本発明の一実施例を示す抵
抗入り点火プラグの正面断面図、第３図は第２図
の要部拡大断面図、第４図は本発明の他の実施例
を示す要部拡大断面図であり、第５図は雑音電界
強度の比較測定を示すグラフである。
１……絶縁碍子、１ａ……中空孔、２，１２，
２２……中心電極、１２ｃ，２２ｃ……端面、１
２ｄ，２２ｄ……凸部、１２ｅ……頂面、３，
３′……導電性ガラス、４……抵抗体。
1a and 1b are enlarged sectional views of main parts of a conventional resistor-containing spark plug, FIG. 2 is a front sectional view of a resistor-containing spark plug showing an embodiment of the present invention, and FIG. 3 is a main part of FIG. 2. FIG. 4 is an enlarged sectional view of a main part showing another embodiment of the present invention, and FIG. 5 is a graph showing comparative measurement of noise electric field strength. 1... Insulator, 1a... Hollow hole, 2, 12,
22... Center electrode, 12c, 22c... End surface, 1
2d, 22d...Protrusion, 12e...Top surface, 3,
3'... Conductive glass, 4... Resistor.
Claims (1)
との間に導電性ガラスを両端に配して抵抗体を封
着した抵抗入り点火プラグにおいて、前記中心電
極の前記導電性ガラスに接する側の端面の中央に
凸部を形成し、この凸部の頂面が少なくとも前記
抵抗体内に突出するように埋設したことを特徴と
する抵抗入り点火プラグ。 ２ 上記凸部が中心電極と同材または異種の金属
から成ることを特徴とする特許請求の範囲第１項
記載の抵抗入り点火プラグ。 ３ 上記凸部が電気絶縁性を有するセラミツクス
はフエライトを中心電極の端面に嵌合して成るこ
とを特徴とする特許請求の範囲第１項記載の抵抗
入り点火プラグ。[Scope of Claims] 1. A resistor-containing spark plug in which a resistor is sealed with conductive glass disposed at both ends between a center electrode and a terminal electrode inside a hollow hole of an insulator, wherein the conductive glass of the center electrode 1. A resistor-containing spark plug, characterized in that a convex portion is formed at the center of an end surface in contact with the glass, and the resistor-containing spark plug is embedded so that at least the top surface of the convex portion protrudes into the resistor body. 2. The resistor-containing spark plug according to claim 1, wherein the convex portion is made of the same material as the center electrode or a different metal. 3. The resistor-containing spark plug according to claim 1, wherein the convex portion is made of electrically insulating ceramic made by fitting ferrite into the end face of the center electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9190880A JPS5717587A (en) | 1980-07-04 | 1980-07-04 | Resistor filled ignition plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9190880A JPS5717587A (en) | 1980-07-04 | 1980-07-04 | Resistor filled ignition plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5717587A JPS5717587A (en) | 1982-01-29 |
| JPS6221233B2 true JPS6221233B2 (en) | 1987-05-12 |
Family
ID=14039672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9190880A Granted JPS5717587A (en) | 1980-07-04 | 1980-07-04 | Resistor filled ignition plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5717587A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2800279B2 (en) * | 1988-07-06 | 1998-09-21 | 株式会社デンソー | Spark plug |
| JP4922980B2 (en) * | 2008-03-31 | 2012-04-25 | 日本特殊陶業株式会社 | Spark plug |
| JP6043261B2 (en) * | 2013-09-24 | 2016-12-14 | 日本特殊陶業株式会社 | Spark plug |
| JP6309035B2 (en) * | 2016-02-16 | 2018-04-11 | 日本特殊陶業株式会社 | Spark plug |
| JP6855330B2 (en) * | 2017-06-06 | 2021-04-07 | 日本特殊陶業株式会社 | Spark plug |
-
1980
- 1980-07-04 JP JP9190880A patent/JPS5717587A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5717587A (en) | 1982-01-29 |
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