JPH01114622A - Self-controlling type ceramic glow plug - Google Patents
Self-controlling type ceramic glow plugInfo
- Publication number
- JPH01114622A JPH01114622A JP27284187A JP27284187A JPH01114622A JP H01114622 A JPH01114622 A JP H01114622A JP 27284187 A JP27284187 A JP 27284187A JP 27284187 A JP27284187 A JP 27284187A JP H01114622 A JPH01114622 A JP H01114622A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- self
- glow plug
- heating element
- heater rod
- 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 48
- 238000010438 heat treatment Methods 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 238000013021 overheating Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はディーゼルエンジンの始動補助装置として用い
るセラミック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 ceramic glow plug used as a starting aid for a diesel engine.
一般にディーゼルエンジンは低温時の始動性が悪い為に
副燃焼室または燃焼室内にグロープラグを装着し、これ
に電流を流して発熱させることにより、室内に噴射され
る燃料を一部仮燃焼させたり、室内を加熱してエンジン
の始動性を向上させる方法が用いられている。Diesel engines generally have poor starting performance at low temperatures, so a glow plug is installed in the auxiliary combustion chamber or combustion chamber, and by passing an electric current through it and generating heat, a portion of the fuel injected into the interior is temporarily combusted. , a method is used to improve engine startability by heating the interior of the vehicle.
このグロープラグとしては、従来のシーズ型のものに代
えて、耐熱衝撃性の大きな窒化珪素やサイアロンなどの
セラミック体中に発熱体としてタングステン、モリブデ
ンなどのワイヤを埋設しておき、該ワイヤに外部端子よ
り大電流を流し、高温となるようにしたセラミックグロ
ープラグが多用されている。Instead of the conventional seeded type glow plug, a wire made of tungsten, molybdenum, etc. is embedded as a heating element in a ceramic body such as silicon nitride or sialon, which has high thermal shock resistance, and the wire is connected to the outside. Ceramic glow plugs, which allow a large current to flow through the terminals and reach high temperatures, are often used.
また、グロープラグの特性としては急速に９００℃程度
まで昇温し、かつ発熱体などが溶断しないように最高温
度が１２００℃以下に制御されることが求められている
。そのため、特開昭６０−２１８号公報に示されている
ように発熱体と電流制御用抵抗を直列に接続してセラミ
ック体中に埋設してなる自己制御型セラミックグロープ
ラグが開発されてきた。これは昇温に伴って電流制御用
抵抗の抵抗値が増大することを利用して電流量を抑制し
、グロープラグの過加熱を防止するようにしたものであ
る。In addition, the characteristics of glow plugs are such that the temperature rises rapidly to about 900° C., and the maximum temperature is required to be controlled to 1200° C. or less so that the heating element etc. do not melt. Therefore, as shown in Japanese Patent Application Laid-open No. 60-218, a self-controlling ceramic glow plug has been developed in which a heating element and a current control resistor are connected in series and embedded in a ceramic body. This utilizes the fact that the resistance value of the current control resistor increases as the temperature rises to suppress the amount of current and prevent overheating of the glow plug.
ところが、このような従来の自己制御型セラミックグロ
ープラグは、電流制御用抵抗がセラミックヒータ棒を支
持する金属パイプの内側にあったため、金属パイプの冷
却作用により電流量制御用抵抗の温度が上がりにくく、
前記したような過加熱を防止する効果が少なかった。し
たがってセラミックヒータ棒が１２００℃以上の高温に
なり易くその結果、クラックが発生したり、発熱体の溶
断などの恐れがあった。However, in such conventional self-control ceramic glow plugs, the current control resistor was located inside the metal pipe that supported the ceramic heater rod, so the temperature of the current control resistor was difficult to rise due to the cooling effect of the metal pipe. ,
The effect of preventing overheating as described above was small. Therefore, the ceramic heater rod tends to reach a high temperature of 1,200° C. or higher, and as a result, there is a risk that cracks may occur or the heating element may melt.
上記に鑑みて本発明は、自己制御型セラミックグロープ
ラグにおいて、セラミックヒータ棒に埋設した発熱体、
制御抵抗の双方を金属パイプ先端より２１１Ｉ１１以上
離れたところに配置したものである。In view of the above, the present invention provides a self-regulating ceramic glow plug that includes a heating element embedded in a ceramic heater rod,
Both control resistors are placed at a distance of 211I11 or more from the tip of the metal pipe.
さらに、前記発熱体、抵抗体間の接続部の長さｊｌｌ
と、セラミックヒータ棒の突出部分の長さｌとの比を０
．２≦１．／Ｉｔ≦０．５とすることによって９００℃
までの昇温時間が５秒以下で、かつ１２００℃以上には
過加熱されないセラミックグロープラグとすることがで
きる。Furthermore, the length of the connection between the heating element and the resistor is jll
and the length l of the protruding part of the ceramic heater rod is 0.
．． 2≦1. /It≦0.5 to 900℃
It is possible to provide a ceramic glow plug that takes 5 seconds or less to heat up and does not overheat to 1200° C. or higher.
以下、本発明実施例を図によって説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図において１は発熱体となるセラミックヒータ棒で
あり、その先端には０字状に屈曲されたコイル状の発熱
体２が埋設され、該発熱体２の両端にはそれぞれ接続部
３を介してコイル状の制御抵抗４が接続され、さらに制
御抵抗４と同一線でピッチを１．５倍以上に粗くした接
続線５を介して電極取り出し線６ａ、６ｂに接続されて
いる。In FIG. 1, numeral 1 is a ceramic heater rod that serves as a heating element, and a coil-shaped heating element 2 bent in a 0-shape is embedded in the tip of the rod, and a connecting part 3 is connected to each end of the heating element 2. A coil-shaped control resistor 4 is connected thereto, and is further connected to electrode lead lines 6a, 6b via a connecting line 5 which is the same line as the control resistor 4 and whose pitch is 1.5 times or more coarser.
このセラミックヒータ棒１はメタライズ層を介し金属パ
イプ７とろう付けされ、また後端部はメタライズ層を介
しターミナルキャップ８にろう付けされている。電極取
出線６ａとろう付けされた金属パイプ７は取付金具９の
先端部内腔にろう付けされて陰極を構成し、一方電極取
り出し線６ｂとろう付けされたターミナルキャップ８は
リード棒１０にろう付けされ、さらにこのリード棒１０
が中軸１１に溶接されて陽極となっている。This ceramic heater rod 1 is brazed to a metal pipe 7 through a metallized layer, and its rear end is brazed to a terminal cap 8 through a metallized layer. The metal pipe 7 to which the electrode lead wire 6a is brazed is brazed to the inner cavity of the tip end of the mounting bracket 9 to constitute a cathode, while the terminal cap 8 to which the electrode lead wire 6b is brazed is brazed to the lead rod 10. In addition, this lead rod 10
is welded to the center shaft 11 and serves as an anode.
また、発熱体２は−ＲｅＪ−ＣｏｓＷ−Ｍｏ＋Ｗ−Ｚｒ
等の高融点で抵抗温度係数の小さなタングステン（−）
合金を用い、制御抵抗４は純−など高融点を有し、発熱
体２よりも抵抗温度係数の高いものを用いる。Moreover, the heating element 2 is -ReJ-CosW-Mo+W-Zr
Tungsten (-) with a high melting point and a small temperature coefficient of resistance, such as
The control resistor 4 is made of an alloy that has a high melting point, such as pure metal, and has a higher temperature coefficient of resistance than the heating element 2.
接続部３は−または導電セラミックから成る円筒体であ
り、両端面から発熱体２と抵抗体４を挿入して接続を行
っている。The connecting portion 3 is a cylindrical body made of conductive ceramic, and the heating element 2 and the resistor 4 are inserted from both end faces for connection.
これらを窒化珪素などのセラミック粉末中に埋設し、楕
円状に予備成型を行ったのち、ホットブー レス法でセ
ラミックを焼結させ一体成型することによってセラミッ
クヒータ棒１が形成されるが、接続線５がコイル状にな
っているため、焼成後の冷却時でも焼膨張差による断線
の恐れがない。After embedding these in ceramic powder such as silicon nitride and preforming them into an elliptical shape, the ceramic heater rod 1 is formed by sintering the ceramic and integrally molding it using the hot bures method. Since it is coiled, there is no risk of wire breakage due to differences in sintering expansion even when cooling after sintering.
上記本発明実施例に係る自己制御型セラミックグロープ
ラグを用いれば、通電初期には急速に昇温し、かつ制御
抵抗４が金属パイプ７よりも離れた部分にあることから
セラミックヒータ棒ｌの昇温に伴って制御抵抗４も昇温
し、適切な電流量制御が行えるため、過加熱を防止する
ことができる。If the self-regulating ceramic glow plug according to the embodiment of the present invention is used, the temperature rises rapidly at the initial stage of energization, and since the control resistor 4 is located further away from the metal pipe 7, the temperature of the ceramic heater rod 1 increases. As the temperature increases, the temperature of the control resistor 4 also increases, and the amount of current can be controlled appropriately, so overheating can be prevented.
また第２図に他の実施例を示すように発熱体２、制御抵
抗４、接続線５は波状として、接続部３は発熱体２と制
御抵抗４を拡散接合などにより直接接続したものであっ
てもよい０発熱体２、制御抵抗４の形状はこの他のさま
ざまなものとすることができ、接続部３も捲回接続させ
るなどさまざまな構造とすることができる。Further, as shown in another embodiment in FIG. 2, the heating element 2, the control resistor 4, and the connecting wire 5 are wavy, and the connecting portion 3 is a structure in which the heating element 2 and the control resistor 4 are directly connected by diffusion bonding or the like. The heating element 2 and the control resistor 4 may have various other shapes, and the connecting portion 3 may also have various structures such as a winding connection.
さらに、図示していないが、発熱体２、接続部３、制御
抵抗４、接続線５をいずれもプリント印刷によって形成
し、線幅あるいはプリント材料を変化させて抵抗値を調
整するようにしてもよい。Furthermore, although not shown, the heating element 2, the connecting portion 3, the control resistor 4, and the connecting wire 5 may all be formed by printing, and the resistance value may be adjusted by changing the line width or printing material. good.
大致皿」
次に第１図に示した自己制御型グロープラグについて、
制御抵抗４と金属パイプ７との距離ｄをさまざまに変化
させたものを試作し、それぞれ昇温特性を調べる実験を
行った。用いるグローブラグはセラミックヒータ棒１断
面の長径が４．４ｍｍ、短径が３．５１で、突出部の長
さ２が１４ｍｎ＋のものとし１１ｖの電圧を加えたとき
の昇温特性は第３図（ａ）〜（ｅ）に示す通りである。Next, regarding the self-regulating glow plug shown in Figure 1,
Prototypes were manufactured with various distances d between the control resistor 4 and the metal pipe 7, and experiments were conducted to investigate the temperature rise characteristics of each. The globe lug to be used has a ceramic heater rod 1 cross section with a major axis of 4.4 mm, a minor axis of 3.51 mm, and a protrusion length 2 of 14 mm+, and the temperature rise characteristics when a voltage of 11 V is applied are shown in Figure 3. As shown in (a) to (e).
第３図（ａ）は制御抵抗４が金属パイプ７の内側にある
場合であり、第３図（ｂ）〜（ｅ）は制御抵抗４と金属
パイプ７との距［ｄがθ〜３１ＩＩ１１の場合をそれぞ
れ示している。3(a) shows the case where the control resistor 4 is located inside the metal pipe 7, and FIGS. 3(b) to (e) show the case where the distance between the control resistor 4 and the metal pipe 7 [d is θ~31II11 Each case is shown.
ここで、自己制御型グロープラグに求められる特性は最
高温度が１２００℃以下であり、９００℃の到達時間が
５秒以下となることであるが、第３図（ｄ）（ｅ）に示
すように制御抵抗４と金属パイプ７との距離ｄが２ ｍ
ｍ以上であれば前記要求特性を満たしていることがわか
る。Here, the characteristics required for a self-regulating glow plug are that the maximum temperature is 1200°C or less and the time to reach 900°C is 5 seconds or less, but as shown in Figure 3 (d) and (e), The distance d between the control resistor 4 and the metal pipe 7 is 2 m.
It can be seen that if it is greater than or equal to m, the above-mentioned required characteristics are satisfied.
スｌ材岨λ
次に第１図に示した自己制御型グロープラグにおいて、
セラミックヒータ棒１の突出部分の長さｉと接続部３の
長さ１１をさまざまに変化させ、それぞれ９００℃にな
るまでの時間を測定した。なお、制御抵抗４と金属パイ
プ７の距離ｄは３ｍ１ｌｌとし、他は実験例１と同じ条
件にした。結果は第１表の通りである。Next, in the self-regulating glow plug shown in Fig. 1,
The length i of the protruding portion of the ceramic heater rod 1 and the length 11 of the connecting portion 3 were varied, and the time required to reach 900° C. was measured for each. Note that the distance d between the control resistor 4 and the metal pipe 7 was 3 ml, and the other conditions were the same as in Experimental Example 1. The results are shown in Table 1.
前記したように、グロープラグの要求特性は９００℃に
達するまでの時間が５秒以下となることであるが、第１
表から１，７Ｎが０．２以上の場合はほぼ前記要求を満
たしていることがわかる。１１／ｌが０．２より小さい
場合は発熱体２と制御抵抗４が近すぎるため、発熱体２
の発する熱により制御抵抗４が昇温しやすく、発熱体２
の温度が上昇しきらないうちに過加熱防止効果が働き、
急速昇温性が得られないものである。As mentioned above, the required characteristic of a glow plug is that the time to reach 900°C is 5 seconds or less, but the first characteristic is
From the table, it can be seen that when 1,7N is 0.2 or more, the above requirements are almost satisfied. If 11/l is smaller than 0.2, the heating element 2 and the control resistor 4 are too close;
The temperature of the control resistor 4 tends to rise due to the heat generated by the heating element 2.
The overheating prevention effect works before the temperature reaches its peak.
Rapid temperature rise cannot be achieved.
また、逆に１１／１が大きすぎると、その分売熱体２や
制御抵抗４の占める割合が小さくなり優れた特性が得ら
れなくなるため、１．／（ｌは０．５以下のものが良か
った。On the other hand, if 11/1 is too large, the ratio occupied by the heat dissipating element 2 and the control resistor 4 will become smaller, making it impossible to obtain excellent characteristics. /(l was preferably 0.5 or less.
以上の実験例をまとめると、第１図に示す自己制御型セ
ラミックグロープラグにおいて、制御抵抗４と金属パイ
プ７との距離ｄは２ＩＩＩＩ１１以上とし、接続部３の
長さβ１とセラミックヒータ棒１の突出部の長さｌとの
比は０．２≦β＋／ｌ≦０．５とすれば、要求特性を満
たし優れたグロープラグとできることが判る。To summarize the above experimental examples, in the self-control ceramic glow plug shown in FIG. It can be seen that if the ratio of the length of the protrusion to l is 0.2≦β+/l≦0.5, an excellent glow plug that satisfies the required characteristics can be obtained.
また、発熱体２の長さＲい接続部３の長さβ３、制′４
Ｂ抵抗４の長さＲ２の比は種々実験の結果Ｒ１：＃１：
Ｒｚ・１：０．５〜１．５：Ｑ、５〜１．５としたもの
が優れており、特にＲ１： ｅ ＋：Ｒｚ＝１：１：
１としたものが最も優れていた。In addition, the length of the heating element 2 is R, the length of the connecting part 3 is β3, and the limit is 4.
As a result of various experiments, the ratio of the length R2 of the B resistor 4 is R1:#1:
Rz・1:0.5~1.5:Q, 5~1.5 is excellent, especially R1: e +: Rz=1:1:
The one rated 1 was the best.
以上の実施例は第１図に示した自己制御型セラミックグ
ロープラグについてのみ述べたが、第２図に示したよう
なものであっても同様であった。Although the above embodiments have been described only with respect to the self-regulating ceramic glow plug shown in FIG. 1, the same applies to the self-regulating ceramic glow plug shown in FIG.
また、制御抵抗４を発熱体２の陰極側、陽極側に２個備
えたもののみを示したが、いずれか一方のみのものであ
っても同様である。Further, although only a configuration in which two control resistors 4 are provided on the cathode side and an anode side of the heating element 2 is shown, the same applies even if only one of them is provided.
以上のように本発明によれば、自己制御型セラミックグ
ロープラグにおいてセラミックヒータ棒に埋設した発熱
体、制御抵抗の双方を金属パイプ先端より２ ｍｍ以上
離れたところに配置したことによって、９００℃までの
昇温時間が５秒以下と急速昇温でき、かつ１２００℃以
上に過加熱されることを防止できるため、セラミックヒ
ータ棒にクランクが生じたり、発熱体が溶断する恐れが
ないなどの特長を有する高性能の自己制御型セラミック
グロープラグを提供することができる。As described above, according to the present invention, in a self-regulating ceramic glow plug, both the heating element embedded in the ceramic heater rod and the control resistor are placed at least 2 mm away from the tip of the metal pipe. The temperature can be raised quickly, taking less than 5 seconds, and it can prevent overheating to over 1200℃, so there is no risk of the ceramic heater rod cranking or the heating element melting. A high performance self-regulating ceramic glow plug can be provided.
第１図は本発明実施例に係る自己制御型セラミックグロ
ープラグを示す断面図、第２図は本発明の他の実施例に
係る自己制御型セラミックグロープラグを構成するセラ
ミックヒータ棒のみを示す断面図である。
第３図（ａ）〜（ｅ）はそれぞれ自己制御型セラミック
グロープラグの昇温特性を示すグラフである。
１：セラミックヒータ棒
２：発熱体
３：接続部
４：制御抵抗
、５：接続線
６ａ、６ｂ ：電極取出線
７：金属パイプFIG. 1 is a cross-sectional view showing a self-regulating ceramic glow plug according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing only a ceramic heater rod constituting a self-regulating ceramic glow plug according to another embodiment of the present invention. It is a diagram. FIGS. 3(a) to 3(e) are graphs showing the temperature increase characteristics of self-regulating ceramic glow plugs. 1: Ceramic heater rod 2: Heating element 3: Connection part 4: Control resistor, 5: Connection wires 6a, 6b: Electrode lead wire 7: Metal pipe
Claims (1)
を有し、これら発熱体、制御抵抗を埋設したセラミック
ヒータ棒を金属パイプで保持してなる自己制御型セラミ
ックグロープラグにおいて、前記発熱体および制御抵抗
をセラミックヒータ棒の金属パイプ先端より２ｍｍ以上
離れた部位に配置せしめたことを特徴とする自己制御型
セラミックグロープラグ。（２）前記発熱体、制御抵抗
間の接続部の長さｌ＿１と、前記セラミックヒータ棒の
金属パイプより突出した部分の長さｌの比を０．２≦ｌ
＿１／ｌ≦０．５としたことを特徴とする特許請求の範
囲第１項記載の自己制御型セラミックグロープラグ。(1) A self-controlling ceramic glow plug that has a heating element and a control resistor connected in series to the heating element, and a ceramic heater rod in which the heating element and the control resistor are embedded is held by a metal pipe, A self-controlling ceramic glow plug characterized in that the heating element and the control resistor are arranged at a distance of 2 mm or more from the tip of the metal pipe of the ceramic heater rod. (2) The ratio of the length l_1 of the connection part between the heating element and the control resistor to the length l of the part of the ceramic heater rod protruding from the metal pipe is 0.2≦l
A self-regulating ceramic glow plug according to claim 1, characterized in that _1/l≦0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62272841A JP2720033B2 (en) | 1987-10-28 | 1987-10-28 | Self-control ceramic glow plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62272841A JP2720033B2 (en) | 1987-10-28 | 1987-10-28 | Self-control ceramic glow plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01114622A true JPH01114622A (en) | 1989-05-08 |
| JP2720033B2 JP2720033B2 (en) | 1998-02-25 |
Family
ID=17519519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62272841A Expired - Lifetime JP2720033B2 (en) | 1987-10-28 | 1987-10-28 | Self-control ceramic glow plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2720033B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5362944A (en) * | 1991-02-06 | 1994-11-08 | Jidosha Kiki Co., Ltd. | Glow plug with dual, dissimilar resistive heating elements in ceramic heater |
| EP0650020A2 (en) * | 1993-10-20 | 1995-04-26 | Isuzu Ceramics Research Institute Co., Ltd. | A ceramic heater and a method of manufacture thereof |
| WO2016080105A1 (en) * | 2014-11-21 | 2016-05-26 | ボッシュ株式会社 | Method for manufacturing ceramic heater-type glow plug and ceramic heater-type glow plug |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5960125A (en) * | 1982-09-28 | 1984-04-06 | Jidosha Kiki Co Ltd | Glow-plug for diesel engine |
| JPS628555U (en) * | 1985-06-26 | 1987-01-19 |
-
1987
- 1987-10-28 JP JP62272841A patent/JP2720033B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5960125A (en) * | 1982-09-28 | 1984-04-06 | Jidosha Kiki Co Ltd | Glow-plug for diesel engine |
| JPS628555U (en) * | 1985-06-26 | 1987-01-19 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5362944A (en) * | 1991-02-06 | 1994-11-08 | Jidosha Kiki Co., Ltd. | Glow plug with dual, dissimilar resistive heating elements in ceramic heater |
| EP0650020A2 (en) * | 1993-10-20 | 1995-04-26 | Isuzu Ceramics Research Institute Co., Ltd. | A ceramic heater and a method of manufacture thereof |
| WO2016080105A1 (en) * | 2014-11-21 | 2016-05-26 | ボッシュ株式会社 | Method for manufacturing ceramic heater-type glow plug and ceramic heater-type glow plug |
| JPWO2016080105A1 (en) * | 2014-11-21 | 2017-06-29 | ボッシュ株式会社 | Manufacturing method of ceramic heater type glow plug and ceramic heater type glow plug |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2720033B2 (en) | 1998-02-25 |
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