JPS6373023A - Self-controlling ceramic glow plug - Google Patents
Self-controlling ceramic glow plugInfo
- Publication number
- JPS6373023A JPS6373023A JP21886186A JP21886186A JPS6373023A JP S6373023 A JPS6373023 A JP S6373023A JP 21886186 A JP21886186 A JP 21886186A JP 21886186 A JP21886186 A JP 21886186A JP S6373023 A JPS6373023 A JP S6373023A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- resistor
- heat generating
- glow plug
- lead
- 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.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 238000005219 brazing Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241000252233 Cyprinus carpio Species 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野二本発明はディーゼル機関の副燃焼室
に装盾され始動時に該副燃焼室を予懇するために使用さ
れる急速加熱：ｐグロープラグに関するものである。[Detailed Description of the Invention] Industrial Application Field 2 The present invention relates to a rapid heating: p-glow plug that is installed in the auxiliary combustion chamber of a diesel engine and is used to preheat the auxiliary combustion chamber at the time of startup. be.
従来の技術ニ一般にディーゼ／Ｌ’機関は低温時におけ
る始動性が悪いためシリンダー内又は副燃焼室内にグロ
ープラグを装盾し、室内の温度を上昇させて機関の始動
特性を向上させる方法が行われおシ、始動時において急
速な昇温特性を持つことが要求される。Conventional technology Generally speaking, Diesel/L' engines have poor starting performance at low temperatures, so a method has been used in which a glow plug is installed inside the cylinder or in the auxiliary combustion chamber to raise the temperature inside the room and improve the starting performance of the engine. However, it is required to have rapid temperature rise characteristics at startup.
急速加熱型グロープラグとしては第３図に示すようにセ
ラミック発熱体に電流制御用の抵抗体を直列に接続した
溝造の自己制御型グロープラグが特開昭５９−１５７４
１８号公報に開示されている。第３図において１は取付
金具２はセラミック発熱体３は外筒４は抵抗体用コイル
１１は発熱線１２．１８はいずれも鑞付は接合部、１４
は充填粉末を示す。As a rapid heating type glow plug, as shown in Fig. 3, Mizozo's self-control type glow plug, which has a ceramic heating element connected in series with a resistor for current control, was published in Japanese Patent Application Laid-open No. 59-1574.
It is disclosed in Publication No. 18. In Fig. 3, 1 is the mounting bracket 2, the ceramic heating element 3 is the outer cylinder 4, the resistor coil 11 is the heating wire 12, 18 is the soldered joint, 14
indicates filled powder.
発明が解決しようとする問題点：セラミック発熱体と抵
抗体用コイ／Ｌ’を直接球付は接合した上記第３図に示
す自己制御型グロープラグでは使用中に抵抗体４の温度
が昇り鑞付部が溶解したり、接触抵抗の変化を句し、プ
ラグとしての温度特性の変化あるいは導通不良となる欠
点があった。またコイルをセラミック発熱体２と鑞付け
する場合に外筒３との場合にも同様であるが、Ｈ２又は
１十Ｎ２の高温還元性雰囲気での鑞付けが必要であるが
この槌付は中に抵抗体用コイルが高温で変形すること、
及びコイル材が高温での脆化を起して材料特性が著しく
悪化する不具合があり友。例えば結晶粒の成長を起して
粒界破断が生じ易くなる等の問題があった、
問題点を解決するための手段及実施例二本発明はこれら
の問題点を解決するための提案であって前記従来例の自
己制御型セラミックグロープラグにおいて、中軸７とセ
ラミック発熱体２の１１）ｊに介設した電流制御用抵抗
体用のコイ／Ｉ／４を二部分に分割して第１図及第２図
に示すように、その一方のセラミック発熱体側の部分は
発熱特性を低くする念め該抵抗体用のコイル４の線径よ
り太い線径の線材を用いてリードコイ／Ｉ１５とし、セ
ラミックと抵抗体用コイル３端を突合せアーク溶接、プ
ラズマ溶接、レーザー溶度等の手段で第２図に示す如く
接合する。６は溶接部を示す。この際太い線材のリード
コイルの巻き方向を抵抗体用コイルの巻き方向と反対に
しておけば両コイルの接合が比軟的容易であるう
次にこの組立体１５を取付金具１の内腔内に配して外ｎ
３と好ましくは上記１α材よ？）軟化点の低い線材を用
いて鑞付け１６し、取付金具１の上端開口部をガラス等
のシール材８で加熱封着し、更に絶縁体９を介して端子
ナラ）１０で固定してなるグロープラグである。Problem to be solved by the invention: In the self-regulating glow plug shown in Fig. 3 above, in which the ceramic heating element and the resistor coil/L' are directly connected with the bulb, the temperature of the resistor 4 rises during use, causing it to melt. There were drawbacks such as melting of the attached part, changes in contact resistance, changes in the temperature characteristics of the plug, and poor conductivity. Also, when brazing the coil with the ceramic heating element 2, the same applies to the case of the outer cylinder 3, but it is necessary to braze in a high-temperature reducing atmosphere of H2 or 10N2, but this hammering is not possible. The resistor coil is deformed at high temperatures,
Also, there is a problem that the coil material becomes brittle at high temperatures and the material properties deteriorate significantly. For example, there were problems such as crystal grains growing easily and causing grain boundary rupture. Means for Solving Problems and Example 2 The present invention is a proposal to solve these problems. In the conventional self-control ceramic glow plug, the current control resistor coil/I/4 interposed between the center shaft 7 and the ceramic heating element 2 (11)j is divided into two parts as shown in FIG. As shown in Fig. 2, one of the parts on the ceramic heating element side is made of lead coil/I15 using a wire rod with a wire diameter thicker than the wire diameter of the coil 4 for the resistor, in order to lower the heating characteristics. and the three ends of the resistor coil are joined by butt welding, plasma welding, laser welding, etc. as shown in FIG. 6 indicates a welded portion. At this time, if the winding direction of the thick wire lead coil is opposite to the winding direction of the resistor coil, joining of both coils will be relatively easy. Placed outside
3 and preferably the above 1α material. ) A wire rod with a low softening point is used for brazing 16 , the upper end opening of the mounting bracket 1 is heat-sealed with a sealing material 8 such as glass, and further fixed with a terminal hole ( ) 10 via an insulator 9 . It's a glow plug.
作用及び効果二本発明の自己制罪型セラミックグローブ
フグではセラミック発熱体と接合するリードコイルとし
て抵抗体用コイルに比し発熱特性の低い大径の線材を用
いたので、発熱体２とリードコイ／Ｉ１５の自材は接合
部１２において稙材が軟化溶融することが防止できるこ
とから、接触抵抗の変化に伴う温度特性の劣化あるいは
導通不良といったグロープラグとして致命的な問題が改
善される。また外筒とともにセラミック発熱体に接合す
る際高温の還元性雰囲気中の鑞付けでリードコイルは変
形することなく、且つ脆化を起して結晶粒成長による粒
界破断のような不具合の事態を生ずるおそれがない。Function and Effect 2 In the self-limiting ceramic globe puffer of the present invention, a large-diameter wire rod with lower heat generation characteristics than a resistor coil is used as the lead coil to be connected to the ceramic heating element, so the heating element 2 and the lead coil/ Since I15's own material can prevent the stem material from softening and melting at the joint portion 12, problems fatal to glow plugs such as deterioration of temperature characteristics or poor conduction due to changes in contact resistance are improved. Furthermore, when joining the outer cylinder to the ceramic heating element, the lead coil will not be deformed due to brazing in a high-temperature reducing atmosphere, and will not become brittle and cause problems such as grain boundary fracture due to grain growth. There is no risk of this occurring.
図、第３図は従来の仝型セラミックグロープラグの縦断
正面図である。
１・・・取付金具 ２・・・セラミック発熱体 ３・・
・外筒 ４・・・抵抗体用コイ／１１５−・・リードコ
イ／Ｌ／ ６・・・溶接部 ７・・・中軸 ８・・・
シール材 ９・・・絶縁材１０・・・ナツト １１・・
・発熱線コイ／Ｌ’ １２，１８．１６・・・油付は
接合部 １４・・・充填粉末 １５・・・組立体
特許出願人 日本特殊陶業株式会社
ｊｌ 、”−’ ：ｉ
第１図 第２図3 are longitudinal sectional front views of a conventional single-type ceramic glow plug. 1...Mounting bracket 2...Ceramic heating element 3...
・Outer cylinder 4... Resistor coil/115-... Lead coil/L/ 6... Welded part 7... Center shaft 8...
Seal material 9...Insulating material 10...Nut 11...
・Heating wire carp/L' 12, 18. 16... Oil attached is the joint part 14... Filled powder 15... Assembly patent applicant Nippon Spark Plug Co., Ltd. jl, "-': i Figure 1 Figure 2
Claims (1)
付金具の先端部に設けたセラミック発熱体に電流制御用
の抵抗体を直列に接続して成る自己制御型グロープラグ
において、前記抵抗体用コイルの前記セラミック発熱体
側の一部を抵抗体用コイルの線径より太い線径の線材で
リードコイルとして形成し、両コイルを接続して成る自
己制御型セラミックグロープラグ。In a self-control glow plug comprising a ceramic heating element provided at the tip of an engine mounting bracket and a resistor for current control connected in series to control the temperature of the heating element when the temperature rises due to energization, the resistor A self-controlling ceramic glow plug in which a part of the ceramic heating element side of the resistor coil is formed as a lead coil with a wire having a wire diameter larger than that of the resistor coil, and both coils are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21886186A JPS6373023A (en) | 1986-09-16 | 1986-09-16 | Self-controlling ceramic glow plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21886186A JPS6373023A (en) | 1986-09-16 | 1986-09-16 | Self-controlling ceramic glow plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6373023A true JPS6373023A (en) | 1988-04-02 |
| JPH0313486B2 JPH0313486B2 (en) | 1991-02-22 |
Family
ID=16726467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21886186A Granted JPS6373023A (en) | 1986-09-16 | 1986-09-16 | Self-controlling ceramic glow plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6373023A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002206739A (en) * | 2000-11-13 | 2002-07-26 | Bosch Automotive Systems Corp | Ceramic glow plug and method for manufacturing the same |
-
1986
- 1986-09-16 JP JP21886186A patent/JPS6373023A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002206739A (en) * | 2000-11-13 | 2002-07-26 | Bosch Automotive Systems Corp | Ceramic glow plug and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0313486B2 (en) | 1991-02-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |