JPS63301479A - Ignition plug - Google Patents
Ignition plugInfo
- Publication number
- JPS63301479A JPS63301479A JP13340087A JP13340087A JPS63301479A JP S63301479 A JPS63301479 A JP S63301479A JP 13340087 A JP13340087 A JP 13340087A JP 13340087 A JP13340087 A JP 13340087A JP S63301479 A JPS63301479 A JP S63301479A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- oxide
- film
- firing
- spark plug
- 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.)
- Pending
Links
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000919 ceramic Substances 0.000 claims abstract description 12
- 238000010304 firing Methods 0.000 claims abstract description 12
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000005751 Copper oxide Substances 0.000 claims abstract description 9
- 229910000431 copper oxide Inorganic materials 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims abstract description 7
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010409 thin film Substances 0.000 claims description 13
- 230000003197 catalytic effect Effects 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- -1 alkaline earth metal salt Chemical class 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910017610 Cu(NO3) Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 235000015393 sodium molybdate Nutrition 0.000 description 1
- 239000011684 sodium molybdate Substances 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Landscapes
- Spark Plugs (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は点火栓のくすぶりの原因となる、セラミック絶
縁体の発火部表面に付着した未燃焼カーボンの除去を目
的とした点火栓に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spark plug for the purpose of removing unburned carbon adhering to the surface of the firing part of a ceramic insulator, which causes the spark plug to smolder.
一般に点火栓のセラミック絶縁体の発火部の表面温度が
５５０℃以下の場合、カーボンを主とする堆積物が表面
に付着し、電極間の絶縁抵抗が大１１に低下して電極で
ない部分において飛火する、所謂奥飛等の現象が発生す
ることがあり、正常な火花放電を得ることはできなかっ
た。この現象は１０００−未満の走行距離を有する新車
に多くみられ、又、それ以外でも市内走行などの低速走
行時、あるいは冬期など外気が冷え込んだ時などにも発
生し易かった。Generally, if the surface temperature of the firing part of the ceramic insulator of a spark plug is 550°C or less, deposits mainly composed of carbon will adhere to the surface, and the insulation resistance between the electrodes will drop to 11 degrees, causing sparks to fly in parts that are not electrodes. Phenomena such as so-called back-flying may occur, making it impossible to obtain a normal spark discharge. This phenomenon is often seen in new cars with a mileage of less than 1,000 miles, and is also likely to occur when driving at low speeds such as city driving, or when the outside air is cold such as in winter.
−ａにこの付着したカーボンを除去するためには点火栓
をカーボンの焼却可能な温度（自己清浄温度）、即ち５
５０℃以上まで加熱すれば良い。しかしながらこれだけ
の温度を確保するには、自動車を時速８０〜１１００ｋ
の高速にしなければならず、今日の道路事情からみてほ
とんど不可能な状態にあった。これに対して例えば特公
昭５８−１１０７７号、特願昭６１−２７８７１１号等
において、発火部表面に形成されてカーボンと反応し、
それを活性化することでカーボン自体の清浄温度を大中
に低下する、即ち触媒作用を有する物質（アルカリ金属
、アルカリ土類金属塩、酸化セリウム、酸化銅）を点火
栓に備えることでその発火部表面に付着したカーボンが
低速走行あるいは冷間時速行でも容易に除去される、所
謂自己清浄性に優れた点火栓が提案されている。- In order to remove this carbon attached to
It may be heated to 50°C or higher. However, in order to maintain this level of temperature, it is necessary to drive a car at speeds of 80 to 1100 km/h.
This would have been almost impossible given today's road conditions. On the other hand, for example, in Japanese Patent Publication No. 58-11077 and Japanese Patent Application No. 61-278711, carbon is formed on the surface of the firing part and reacts with carbon.
By activating it, the cleaning temperature of the carbon itself is significantly lowered.In other words, by equipping the spark plug with a substance that has a catalytic action (alkali metal, alkaline earth metal salt, cerium oxide, copper oxide), the ignition occurs. Spark plugs have been proposed that have excellent so-called self-cleaning properties, in which carbon adhering to the surface of the spark plug is easily removed even when running at low or cold speeds.
本発明は係る現状に鑑み、上述した触媒作用を有する物
質よりも一層カーボンの焼却温度を低下せしめる自己清
浄性に優れた点火栓を提供することを目的とする。In view of the current situation, it is an object of the present invention to provide a spark plug with excellent self-cleaning properties that lowers the incineration temperature of carbon even more than the above-mentioned catalytic substances.
上記目的のため本発明によれば、中心電極を包囲するセ
ラミック絶縁体に発火部表面に、カーボンの清浄温度を
低下する触媒作用をもつ酸化銅と酸化モリブデンの薄膜
を具えた点火栓が提供される。For the above-mentioned purpose, the present invention provides a spark plug in which a ceramic insulator surrounding a center electrode is provided with a thin film of copper oxide and molybdenum oxide having a catalytic action to lower the cleaning temperature of carbon on the surface of the firing part. Ru.
既知の触媒物質の内、実験上量も清浄温度を低下させる
ことが認められる酸化銅薄膜に加え、さらにその酸化銅
の触媒作用を助ける酸化モリブデンを併用して上記薄膜
を複合化することにより既知の触媒物質よりも一層、触
媒作用が高められた点火栓を提供できることになる。Among the known catalytic substances, in addition to a copper oxide thin film, which has been experimentally confirmed to lower the cleaning temperature, the above thin film can be composited by using molybdenum oxide, which helps the catalytic action of the copper oxide. This means that it is possible to provide an ignition plug that has an even higher catalytic action than the catalytic materials used in this invention.
まず初めに本発明による点火栓構造について第１図を参
照して説明する。First, a spark plug structure according to the present invention will be explained with reference to FIG.
１は中心電極、２はセラミック絶縁体で中心電極を包囲
して固着し、発火部表面２ａに本発明薄膜３を形成する
。４は取付ネジを備えた主体金具で絶縁体を収納して封
塞固定し、下端面に接地電極５を接合して中心電極の放
電端との間に火花間隙６を形成している。1 is a center electrode, 2 is a ceramic insulator surrounding and fixing the center electrode, and a thin film 3 of the present invention is formed on the firing part surface 2a. Reference numeral 4 denotes a main metal fitting equipped with a mounting screw, which houses an insulator and seals and fixes it.A ground electrode 5 is joined to the lower end surface, and a spark gap 6 is formed between it and the discharge end of the center electrode.
以下、本発明による薄膜３の形成法について具体的に述
べる。The method for forming the thin film 3 according to the present invention will be specifically described below.
まず、銅元素を含んだ塩化銅（ＣｕＣＩ！ ｚ）、硫酸
銅（ＣＬＩＳＯ４）、硝酸銅（Ｃｕ（ＮＯ３） ｔ）等
のＣｕ塩の内、代表的な溶液を作り、これを中心電極を
包囲するセラミック絶縁体の発火部表面に帯状に直接塗
布するか、あるいは間接的にアルミナ（Ａ １２０３）
等の無機物を溶射した後、その上に上記溶液を帯状に塗
布する。このアルミナ等の無機物はＣｕ塩の高温におけ
る絶縁性及び耐熱性を高めるために使用されるものであ
って、かつ溶射等の手段によりＣｕ塩塗布部の表面積を
増加して上記塩とセラミック絶縁体との接着を強める効
果も有する。First, a typical solution of Cu salts containing the copper element, such as copper chloride (CuCI!z), copper sulfate (CLISO4), and copper nitrate (Cu(NO3)t), is prepared, and this solution is used to surround the center electrode. Apply alumina (A 1203) directly to the surface of the igniting part of the ceramic insulator, or indirectly apply alumina (A 1203).
After spraying an inorganic material such as, the above solution is applied in a band shape on top of the inorganic material. This inorganic substance such as alumina is used to improve the insulation and heat resistance of the Cu salt at high temperatures, and the surface area of the Cu salt coated area is increased by means such as thermal spraying, so that the salt and the ceramic insulator are It also has the effect of strengthening the adhesion with.
そしてこの塗布部を５０〜１００℃で乾燥し、次いで、
３００〜６００℃で焼成することにより厚さ約５μｍの
酸化銅薄膜を形成する。次にこの酸化銅薄膜が形成され
ている部分にモリブデン酸アンモニウム（（Ｎｌｌ＜）
ＪＯＪｚａ ’ ４１１ｔＯ） 、或いはモリブデン酸
ナトリウム（ＮａＺＭＯＯ４・２ＨｚＯ）の内、代表的
な溶液を塗布し、同様にこの塗布部を５０〜１００℃で
乾燥した後、３００〜６００℃で焼成することにより厚
さ約１μｍの酸化モリブデン薄膜を形成する。Then, this coated area is dried at 50 to 100°C, and then
By firing at 300 to 600°C, a copper oxide thin film with a thickness of about 5 μm is formed. Next, ammonium molybdate ((Nll<)
JOJza' 411tO) or sodium molybdate (NaZMOO4.2HzO), a typical solution is applied, the coated area is similarly dried at 50 to 100°C, and then baked at 300 to 600°C to increase the thickness. A molybdenum oxide thin film with a thickness of about 1 μm is formed.
本発明による薄膜の触媒効果を確認するため下記の要領
にて実験を行なった。In order to confirm the catalytic effect of the thin film according to the present invention, an experiment was conducted in the following manner.
（実 験）
上述した本発明による点火栓、即ちセラミック絶縁体の
発火部表面に所定の幅の酸化銅薄膜と酸化モリブデン薄
膜を有する点火栓を用意した。さらに比較用として通常
の点火栓（無塗布）及び、既に触媒として前述のアルカ
リ金属塩（Ｎａ２ＣＯ３） トアルカリ土類金属塩（Ｃ
ａＣＱ＋） 、及び酸化銅、夫々の薄膜を塗布した点火
栓を用意した。(Experiment) A spark plug according to the present invention as described above, that is, a spark plug having a copper oxide thin film and a molybdenum oxide thin film of a predetermined width on the firing part surface of a ceramic insulator was prepared. Furthermore, for comparison, we used a normal spark plug (uncoated) and the alkali metal salt (Na2CO3) and alkaline earth metal salt (C
Spark plugs coated with thin films of aCQ+) and copper oxide were prepared.
次にこれら点火栓試料全ての塗布側全面（無塗布試料は
相当部分）にローソクの炎でカーボンを付着させて実施
用試料とした。実験はこの試料を電気炉に配して加熱し
、２７０℃から２０℃毎に各々の雰囲気温度で試料を取
り出し、その時のカーボンの焼却状態を検査することに
より各試料の焼却温度を比較することで行なわれた。Next, carbon was attached to the entire surface of the coated side of all of these ignition plug samples (a considerable portion of the non-coated sample) using a candle flame to prepare test samples. In the experiment, this sample was placed in an electric furnace and heated, and the samples were taken out at each atmospheric temperature from 270℃ to 20℃, and the incineration temperature of each sample was compared by inspecting the state of carbon incineration at that time. It was held in
カーボン焼却温度の比較結果を以下、表１に示す。The comparison results of carbon incineration temperatures are shown in Table 1 below.
表 １
表１に示した様に従来の点火栓Ｅに比べて本発明の点火
栓Ａは約２６０℃程、焼却温度を低下する。Table 1 As shown in Table 1, compared to the conventional spark plug E, the spark plug A of the present invention lowers the incineration temperature by about 260°C.
又点火栓Ｂ、Ｃ，Ｄも従来より比較してその触媒効果が
確認されたが本発明はどの効果は認められなかった。In addition, the catalytic effects of spark plugs B, C, and D were confirmed in comparison with the conventional ones, but no effect was observed in the present invention.
〔効 果〕
以上述べた様に本発明点火栓は、カーボンの清浄温度を
従来及び公知のものに比べ大巾に低下することにより、
かなりの低速走行あるいは冷間時走行でも発火部に付着
した未燃カーボンを焼却除去することが可能であり、従
って点火栓くすぶり防止に効果がある。又、これに加え
て点火栓製造に関しては、水溶液を用いるため塗布又は
浸すだけの単純な作業で被着でき、量産可能である。[Effects] As described above, the spark plug of the present invention greatly reduces the cleaning temperature of carbon compared to conventional and known spark plugs, thereby achieving
It is possible to incinerate and remove unburned carbon adhering to the ignition part even when running at a considerably low speed or when the engine is cold, and is therefore effective in preventing the ignition plug from smoldering. In addition to this, with regard to the manufacture of spark plugs, since an aqueous solution is used, it can be applied by a simple operation of coating or dipping, and mass production is possible.
第１図は本発明点火栓を示す部分的断面を有する全体図
。
１・・・中心電極、 ２・・・セラミック絶縁体
、２ａ・・・発火部表面、 ３・・・薄膜。
第１図FIG. 1 is an overall view, partially in section, showing the ignition plug of the present invention. DESCRIPTION OF SYMBOLS 1... Center electrode, 2... Ceramic insulator, 2a... Ignition part surface, 3... Thin film. Figure 1
Claims (1)
に、カーボンの清浄温度を低下する触媒作用をもつ酸化
銅と酸化モリブデンの薄膜を具えた点火栓。1. A spark plug with a thin film of copper oxide and molybdenum oxide, which has a catalytic effect to lower the carbon cleaning temperature, on the surface of the firing part of the ceramic insulator surrounding the center electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13340087A JPS63301479A (en) | 1987-05-30 | 1987-05-30 | Ignition plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13340087A JPS63301479A (en) | 1987-05-30 | 1987-05-30 | Ignition plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63301479A true JPS63301479A (en) | 1988-12-08 |
Family
ID=15103860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13340087A Pending JPS63301479A (en) | 1987-05-30 | 1987-05-30 | Ignition plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63301479A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014517474A (en) * | 2011-05-26 | 2014-07-17 | フラム・グループ・アイピー・エルエルシー | Antifouling spark plug and manufacturing method |
| US9337627B2 (en) | 2011-05-26 | 2016-05-10 | Fram Group Ip Llc | Method of applying a coating to a spark plug insulator |
-
1987
- 1987-05-30 JP JP13340087A patent/JPS63301479A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014517474A (en) * | 2011-05-26 | 2014-07-17 | フラム・グループ・アイピー・エルエルシー | Antifouling spark plug and manufacturing method |
| US9337627B2 (en) | 2011-05-26 | 2016-05-10 | Fram Group Ip Llc | Method of applying a coating to a spark plug insulator |
| US9350143B2 (en) | 2011-05-26 | 2016-05-24 | Fram Group IP, LLC | Anti-fouling spark plug and method of making |
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