JPH0450487B2 - - Google Patents
Info
- Publication number
- JPH0450487B2 JPH0450487B2 JP3449185A JP3449185A JPH0450487B2 JP H0450487 B2 JPH0450487 B2 JP H0450487B2 JP 3449185 A JP3449185 A JP 3449185A JP 3449185 A JP3449185 A JP 3449185A JP H0450487 B2 JPH0450487 B2 JP H0450487B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- glow plug
- coil
- metal tube
- mounting bracket
- 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
- 238000010438 heat treatment Methods 0.000 claims description 33
- 239000000919 ceramic Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910001080 W alloy Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/001—Glowing plugs for internal-combustion engines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は主としてデイーゼルエンジンに装着さ
れ始動時に副燃焼室内等を予熱する急速加熱型グ
ロープラグに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rapid heating type glow plug that is mainly installed in a diesel engine and preheats the interior of a sub-combustion chamber and the like at the time of startup.
一般にデイーゼルエンジンは低温時における始
動性が悪い為に、エンジンヘツドに設けた副燃焼
室等にグロープラグを装着して、これに通電して
赤熱し室内に噴射される燃料の一部を燃焼させて
予熱する方法がとられており、始動時に急速な昇
温特性を持つことが要求されると共に、近時は始
動後に於ても燃焼安定化の為のアフターグローと
して長時間使用される傾向となつており、その性
能の向上が益々要望されてきている。
Diesel engines generally have poor starting performance at low temperatures, so a glow plug is attached to the auxiliary combustion chamber installed in the engine head, and when electricity is applied to the glow plug, it becomes red hot and burns part of the fuel injected into the engine. In addition to being required to have a rapid temperature rise characteristic at the time of starting, there is also a recent tendency for it to be used for a long time as an afterglow to stabilize combustion even after starting. There is an increasing demand for improved performance.
この目的に応ずる急速加熱型グロープラグとし
て、高融点金属の発熱線をセラミツク焼結体中に
埋設して成るセラミツクヒーターを発熱体とし、
さらに急速昇温時の加熱に起因する発熱線の溶断
あるいは熱衝撃によるセラミツク割れ等を防止す
る為、該発熱体に、発熱線に用いた線材より大き
い正の抵抗温度係数を有する線材から成る抵抗体
を直列に接続した構造をもち加熱電流を制御する
ようにした自己制御型セラミツクグロープラグが
知られている。 As a rapid heating type glow plug for this purpose, the heating element is a ceramic heater consisting of a heating wire of a high melting point metal embedded in a ceramic sintered body.
Furthermore, in order to prevent melting of the heating wire due to heating during rapid temperature rise or cracking of ceramic due to thermal shock, the heating element is equipped with a resistor made of a wire material having a positive temperature coefficient of resistance larger than that of the wire used for the heating wire. A self-controlling ceramic glow plug is known which has a structure in which bodies are connected in series and which controls the heating current.
第３図は、この種グロープラグの従来例の構造
を示す縦断面図で、発熱体となるセラミツクヒー
ター（以下単にヒーターと略称する）１は抵抗温
度係数の小さい線材例えばタングステンＷにレニ
ウムReを添加したＷ合金よりなる発熱線２をセ
ラミツク焼結体中に埋設してなり、金属外筒３の
内腔にろう接されると共に発熱線２の一端２ａが
電気的に接続され、金属外筒３は取付金具４の先
端部内腔にろう接されて側電極となり、一方発
熱線２の他端２ｂはヒーター１の後端部に嵌着さ
れた金属キヤツプ５に溶接されているリード電極
軸６を経て、抵抗温度係数の大きいニツケルNi
もしくは鉄Feを線材として用いた抵抗体コイル
７に電気的に接続され、抵抗体コイル７の他端は
中軸８の先端部に接続されている。 FIG. 3 is a vertical cross-sectional view showing the structure of a conventional example of this type of glow plug, in which a ceramic heater (hereinafter simply referred to as heater) 1 serving as a heating element is made of a wire material with a small resistance temperature coefficient, such as tungsten W, and rhenium Re. A heating wire 2 made of an added W alloy is embedded in a ceramic sintered body, and is brazed to the inner cavity of a metal outer cylinder 3, and one end 2a of the heating wire 2 is electrically connected to the metal outer cylinder. 3 is soldered to the inner cavity of the tip end of the mounting bracket 4 to serve as a side electrode, while the other end 2b of the heating wire 2 is a lead electrode shaft 6 welded to the metal cap 5 fitted to the rear end of the heater 1. Nickel Ni, which has a large temperature coefficient of resistance,
Alternatively, it is electrically connected to a resistor coil 7 using iron Fe as a wire, and the other end of the resistor coil 7 is connected to the tip of the center shaft 8 .
而して取付金具４の内腔内には、該内腔内にお
ける前記構成部分が埋設されるようにガラス粉末
９が充填され、中軸８は絶縁体１０を取付金具４
との間に介在させて丸ナツト１１で締付け固定さ
れ電極となるように構成されてなるものであ
る。 The inner cavity of the mounting bracket 4 is filled with glass powder 9 so that the above-mentioned components in the inner cavity are buried, and the center shaft 8 is used to attach the insulator 10 to the mounting bracket 4.
It is constructed so that it is interposed between the electrodes and is tightened and fixed with a round nut 11 to serve as an electrode.
又この種自己制御型セラミツクグロープラグに
おける他の従来例としては本出願人による第４図
（第３図と同一部分は同一符号で示す）に示す如
き構造を有する先願例（特願昭58−209992号）が
あり、図にみられるようにヒーター１の発熱線
（図示省略）に接続される抵抗体コイル７（発熱
線及び抵抗体コイルに用いる線材は前記従来例の
場合と同一）が耐熱絶縁材１３を充填した金属チ
ユーブ１２内に中軸８及びリード電極軸６との接
続部を含め埋設された組立体１４として形成さ
れ、この組立体１４が取付金具４の内腔にその胴
部の一部４ａが外周からかしめられ内壁に一部を
密接して収納されてなる先行技術がある。 Another conventional example of this type of self-regulating ceramic glow plug is a prior patent application filed by the present applicant (Japanese Patent Application No. 1983) having a structure as shown in FIG. 4 (the same parts as in FIG. -209992), and as shown in the figure, a resistor coil 7 (the wire used for the heat generating wire and the resistor coil is the same as in the conventional example) is connected to the heat generating wire (not shown) of the heater 1. It is formed as an assembly 14 that is embedded in a metal tube 12 filled with a heat-resistant insulating material 13, including the connection part with the center shaft 8 and the lead electrode shaft 6, and this assembly 14 is inserted into the inner cavity of the mounting bracket 4 with its body. There is a prior art technique in which a portion 4a of the holder is caulked from the outer periphery and is housed in close contact with the inner wall.
このような構造を有する従来の自己制御型セラ
ミツクグロープラグは、いずれも通電昇温時に抵
抗体コイル７の線材とヒーター１の発熱線の線材
との抵抗温度係数の差により抵抗体コイル７の温
度がヒーター１の発熱線より速かに増加し、これ
に伴なう抵抗値の増大によりヒーター１の加熱電
流を減少させ、その加熱を防止できるものであ
り、特に前記せる先行技術例（特願昭58−209992
号）によるものはヒーター１に直列に接続される
抵抗体コイル７が耐熱絶縁材１３を充填した金属
チユーブ１２内に中軸８及びリード電極軸６との
接続部を含め埋設され一体化したシース型抵抗体
構造をもつため、極めて強固なものとなるほか、
取付金具の一部４ａで外周からかしめられ、その
内腔に保持される構造となつている為、取付金具
の内壁と金属チユーブ外周との間隙の製造時にお
けるバラツキが吸収され通電昇温時における抵抗
体の放熱状態が一定化し安定した通電制御機能が
得られるものである。 In all of the conventional self-control ceramic glow plugs having such a structure, the temperature of the resistor coil 7 changes due to the difference in the temperature coefficient of resistance between the wire of the resistor coil 7 and the wire of the heating wire of the heater 1 when the current is applied and the temperature rises. increases faster than the heating wire of the heater 1, and the accompanying increase in resistance value reduces the heating current of the heater 1 and prevents the heating. Showa 58-209992
No.) is a sheath type in which a resistor coil 7 connected in series to a heater 1 is embedded and integrated in a metal tube 12 filled with a heat-resistant insulating material 13, including the connection part with a central shaft 8 and a lead electrode shaft 6. Because it has a resistor structure, it is extremely strong, and
Since the part 4a of the mounting bracket is caulked from the outer periphery and held in its inner cavity, variations in the gap between the inner wall of the mounting bracket and the outer periphery of the metal tube during manufacturing are absorbed, and when energization is applied and the temperature is increased. The heat dissipation state of the resistor becomes constant and a stable energization control function can be obtained.
しかし乍ら、上記せる如き従来の自己制御型セ
ラミツクグロープラグは、いずれもヒーターの発
熱線の線材としてＷにReを添加したＷ合金を用
い、これに直列に接続する抵抗体コイルの線材と
しては抵抗温度係数の極めて大きいNi又はFeを
用いている為、通電昇温時においてヒーターの発
熱に伴ない抵抗体コイルの抵抗値が急激に増大し
通電々流が減少し過ぎることにより、ヒーターの
所定温度に達する時間が遅れ急速昇温性能が阻害
される傾向のあることがその後判明した。
However, all of the conventional self-regulating ceramic glow plugs mentioned above use a W alloy in which Re is added to W as the heating wire of the heater, and the wire of the resistor coil connected in series to this alloy is Since Ni or Fe is used, which has an extremely large temperature coefficient of resistance, the resistance value of the resistor coil increases rapidly as the heater generates heat when energized and the temperature rises, and the energized current decreases too much. It was subsequently discovered that the time required to reach the temperature was delayed and the rapid heating performance tended to be inhibited.
本発明は上記せる問題点を解決するためになさ
れたもので、ヒーターの発熱線に直列に接続され
る抵抗体を、従来用いられていたNi又はFeを線
材とする第１の抵抗体コイルに、該コイルの線材
より抵抗温度係数の小さい線材からなる第２の抵
抗体コイルを組合せ直列に接続されてなるものと
することにより、通電昇温時におけるヒーターの
発熱による抵抗体の急激な抵抗増加を抑止して過
度の電流低減を緩和させ急速昇温性能を向上させ
た自己制御型グロープラグとするものである。
The present invention has been made in order to solve the above-mentioned problems, and the resistor connected in series to the heating wire of the heater is replaced with the first resistor coil whose wire is made of Ni or Fe, which has been conventionally used. By combining and connecting in series a second resistor coil made of a wire with a smaller temperature coefficient of resistance than the wire of the coil, a sudden increase in resistance of the resistor due to heat generated by the heater when energized and heated is prevented. This is a self-control glow plug that suppresses excessive current reduction and improves rapid temperature rise performance.
第１図は本発明自己制御型セラミツクグロープ
ラグの実施例を示す縦断面図で、第３図と同一部
分を同一符号で示したものである。
FIG. 1 is a longitudinal sectional view showing an embodiment of the self-regulating ceramic glow plug of the present invention, in which the same parts as in FIG. 3 are designated by the same reference numerals.
本実施例の自己制御型セラミツクグロープラグ
は、発熱体となるヒーター１の発熱線（図示省
略）の線材に前記従来例と同様抵抗温度係数の小
さいＷにReを添加したＷ合金を用いると共に、
リード電極軸６を経てこれに直列に接続される抵
抗体１７が抵抗温度係数の大きいNi又はFe又は
Ni−Fe合金（30Fe−Ni合金）の線材を用いた第
１の抵抗体コイル１７-1と、該コイルに用いた線
材より抵抗温度係数の小さいFe−Cr合金、Ni−
Cr合金よりなる線材を用いた第２の抵抗体コイ
ル１７-2を組合せ直列に接続してなるものとした
ものであつて、抵抗体１７の構成を除く他の部分
は第３図に示し説明せる従来例と同様の構造をも
つものである。 The self-regulating ceramic glow plug of this embodiment uses a W alloy in which Re is added to W, which has a small temperature coefficient of resistance, for the wire of the heating wire (not shown) of the heater 1 serving as the heating element, as in the conventional example.
The resistor 17 connected in series to the lead electrode shaft 6 is made of Ni or Fe, which has a large resistance temperature coefficient.
The first resistor coil 17 -1 is made of a Ni-Fe alloy (30Fe-Ni alloy) wire, and the first resistor coil 17 -1 is made of a Ni-Cr alloy, which has a smaller temperature coefficient of resistance than the wire used in the coil.
The second resistor coil 17-2 made of wire made of Cr alloy is connected in series, and the other parts except for the structure of the resistor 17 are shown and explained in FIG. It has the same structure as the conventional example.
第２図は本発明自己制御型セラミツクグロープ
ラグの他の実施例の縦断面図で、第４図と同一部
分を同一符号で示したものであり、本実施例にお
けるものは前記実施例に示したものと同様に構成
された第１の抵抗体コイル１７-1と第２の抵抗体
コイル１７-2よりなる抵抗体１７が、第４図とし
て示した前記他の従来例と同様に中軸８及びリー
ド電極軸６との接続部を含め金属チユーブ１２内
に充填された耐熱絶縁材１３中に埋設され一体化
した組立体１４として形成されてなるもので、そ
の他の構造は第４図に示した従来例と同一構造を
もつものである。 FIG. 2 is a longitudinal cross-sectional view of another embodiment of the self-regulating ceramic glow plug of the present invention, in which the same parts as in FIG. 4 are designated by the same reference numerals. A resistor 17 consisting of a first resistor coil 17-1 and a second resistor coil 17-2 , which are constructed in the same manner as the one shown in FIG. It is formed as an integrated assembly 14 embedded in a heat-resistant insulating material 13 filled in a metal tube 12, including the connection portion with the lead electrode shaft 6, and the other structure is shown in FIG. It has the same structure as the conventional example.
第５図は第３図に示した構造を有する従来のグ
ロープラグと、第１図に示した構造をもつ本発明
によるグロープラグにつき行なつた通電昇温特性
の比較テスト結果を示すグラフで、グラフ中Ａは
従来のグロープラグ、Ｂは本発明のグロープラグ
の通電昇温時における時間と発熱体温度との関係
を示したものである。 FIG. 5 is a graph showing the results of a comparison test of current heating characteristics of a conventional glow plug having the structure shown in FIG. 3 and a glow plug according to the present invention having the structure shown in FIG. In the graph, A indicates the conventional glow plug, and B indicates the relationship between the time during energization and heating of the glow plug of the present invention and the temperature of the heating element.
グラフで見られるように本発明によるグロープ
ラグは従来のグロープラグに比べ通電開始後の昇
温時において抵抗体の急激な抵抗増加が抑止され
これに伴つて通電々流の低減が極端に行なわれな
いため、ヒーターに必要とされる900℃に達する
時間が短縮され昇温性能が明らかに改善されてい
ることが理解されよう。 As can be seen in the graph, compared to conventional glow plugs, the glow plug according to the present invention suppresses the rapid increase in resistance of the resistor when the temperature rises after the start of energization, and as a result, the energizing current is extremely reduced. It can be seen that the time required for the heater to reach 900°C is shortened and the temperature increase performance is clearly improved.
以上説明せる如く本発明自己制御型セラミツク
グロープラグは、ヒーターの発熱線に直列に接続
する抵抗体として、従来用いていた抵抗温度係数
の大きい線材からなる抵抗体コイルのみでなく、
これに抵抗温度係数の小さい線材からなる第２の
抵抗体コイルを組合せ直列に接続してなるものと
したことにより通電昇温時における抵抗体の急激
な抵抗増加及びこれに伴なう通電々流の低減を抑
止する効果を生じヒーターの急速昇温性能が向上
されるもので、従来の問題点を解決した優れた昇
温特性を有する自己制御型セラミツクグロープラ
グを提供できるものである。
As explained above, the self-regulating ceramic glow plug of the present invention uses not only a resistor coil made of a wire material with a large temperature coefficient of resistance, but also a resistor coil made of a wire material with a large temperature coefficient of resistance, which has been conventionally used as a resistor connected in series to the heating wire of a heater.
By combining this with a second resistor coil made of a wire material with a small resistance temperature coefficient and connecting it in series, the resistance of the resistor increases rapidly when the current is applied and the temperature rises, and the accompanying current current flows. This has the effect of suppressing the reduction in temperature and improves the rapid heating performance of the heater, thereby making it possible to provide a self-regulating ceramic glow plug with excellent heating characteristics that solves the conventional problems.
第１図は本発明自己制御型セラミツクグロープ
ラグの実施例を示す縦断面図、第２図は本発明自
己制御型セラミツクグロープラグの他の実施例を
示す縦断面図、第３図及び第４図は自己制御型セ
ラミツクグロープラグの従来例を示す縦断面図で
ある。第５図はグロープラグの通電昇温特性の比
較テストのグラフである。
１……セラミツクヒーター、２……発熱線、４
……取付金具、６……リード電極軸、７，１７…
…抵抗体、７-1，７-2，１７-1，１７-2……抵抗
体コイル、９……ガラス粉体、１２……金属チユ
ーブ、１３……耐熱絶縁材、１４……組立体。
FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the self-regulating ceramic glow plug of the present invention, FIG. 2 is a longitudinal cross-sectional view showing another embodiment of the self-regulating ceramic glow plug of the present invention, and FIGS. The figure is a longitudinal sectional view showing a conventional example of a self-controlling ceramic glow plug. FIG. 5 is a graph of a comparison test of the energization temperature rise characteristics of glow plugs. 1...Ceramic heater, 2...Heating wire, 4
...Mounting bracket, 6...Lead electrode shaft, 7, 17...
... Resistor, 7 -1 , 7 -2 , 17 -1 , 17 -2 ... Resistor coil, 9 ... Glass powder, 12 ... Metal tube, 13 ... Heat-resistant insulating material, 14 ... Assembly .
Claims (1)
ラミツク焼結体中に発熱線を埋設したセラミツク
ヒーターを用いると共に、取付金具内腔内で前記
発熱体に抵抗体が直列に接続されて成る自己制御
型セラミツクグロープラグにおいて、前記取付金
具内腔における抵抗体が、正の抵抗温度係数の大
きい材料から成る第１の抵抗体コイルと、これよ
り抵抗温度係数の小さい材料から成る第２の抵抗
体コイルとが直列に接続され形成されてなること
を特徴とする自己制御型セラミツクグロープラ
グ。 ２ 上記第１のコイルにおける材料をNi又はFe
又はNi−Fe合金とし、第２のコイルにおける材
料をNi−Cr合金、Fe−Cr合金とした特許請求の
範囲第１項記載の自己制御型セラミツクグロープ
ラグ。 ３ 前記取付金具内腔における第１及び第２の抵
抗体コイルが両端を開放した金属チユーブ内に配
され、該金属チユーブの後端側から突出して端子
電極となる中軸にその一端が接続されると共に、
他端が発熱体に接続されるリード電極軸に接続さ
れ、金属チユーブ内における前記接続部分がその
内腔内に充填された耐熱絶縁材中に埋設され一体
化した組立体として形成され、該組立体の金属チ
ユーブが取付金具胴部の一部で外周から加締めら
れ取付金具の内腔にその外周を部分的に密接して
収納されてなる特許請求の範囲第１項記載のセラ
ミツクグロープラグ。[Scope of Claims] 1. A ceramic heater in which a heating wire is embedded in a ceramic sintered body is used as the heating element provided at the tip of the mounting bracket, and a resistor is connected in series with the heating element within the inner cavity of the mounting bracket. In the self-regulating ceramic glow plug, the resistor in the mounting bracket lumen is comprised of a first resistor coil made of a material with a large positive temperature coefficient of resistance and a material with a smaller temperature coefficient of resistance than the first resistor coil. A self-controlling ceramic glow plug characterized in that it is formed by being connected in series with a second resistor coil. 2 The material of the first coil is Ni or Fe.
The self-regulating ceramic glow plug according to claim 1, wherein the second coil is made of Ni--Cr alloy or Fe--Cr alloy. 3 The first and second resistor coils in the inner cavity of the mounting bracket are arranged in a metal tube with both ends open, and one end thereof is connected to a center shaft that protrudes from the rear end side of the metal tube and serves as a terminal electrode. With,
The other end is connected to a lead electrode shaft that is connected to a heating element, and the connecting portion in the metal tube is embedded in a heat-resistant insulating material filled in the inner cavity of the metal tube to form an integrated assembly. 2. A ceramic glow plug according to claim 1, wherein a three-dimensional metal tube is crimped from the outer periphery by a part of the body of the fitting and is housed in the inner cavity of the fitting with the outer periphery partially in close contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3449185A JPS61195213A (en) | 1985-02-25 | 1985-02-25 | Self-control type ceramic glow plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3449185A JPS61195213A (en) | 1985-02-25 | 1985-02-25 | Self-control type ceramic glow plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61195213A JPS61195213A (en) | 1986-08-29 |
| JPH0450487B2 true JPH0450487B2 (en) | 1992-08-14 |
Family
ID=12415711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3449185A Granted JPS61195213A (en) | 1985-02-25 | 1985-02-25 | Self-control type ceramic glow plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61195213A (en) |
-
1985
- 1985-02-25 JP JP3449185A patent/JPS61195213A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61195213A (en) | 1986-08-29 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |