JPS5960126A - Glow plug - Google Patents
Glow plugInfo
- Publication number
- JPS5960126A JPS5960126A JP17001182A JP17001182A JPS5960126A JP S5960126 A JPS5960126 A JP S5960126A JP 17001182 A JP17001182 A JP 17001182A JP 17001182 A JP17001182 A JP 17001182A JP S5960126 A JPS5960126 A JP S5960126A
- Authority
- JP
- Japan
- Prior art keywords
- glow plug
- heat
- heat coil
- coil
- electrically
- 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
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)
Abstract
Description
【発明の詳細な説明】
［発明の技術分野］
本発明はジーゼルエンジンの予熱装置として使用される
グロープラグに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a glow plug used as a preheating device for a diesel engine.
［発明の技術的背景とその問題点］
従来より、ジーゼルエンジンの予熱装置とじてビー１〜
コイルを鞘状の保護金属管中に組込み、このヒートコイ
ルと保護金属管との間隙にＭｑＯ等の耐熱性の絶縁粉末
を充填して構成したグロープラグが使用されている。[Technical background of the invention and its problems] Conventionally, diesel engine preheating devices have been used as diesel engine preheating devices.
A glow plug is used in which a coil is assembled into a sheath-like protective metal tube, and a gap between the heating coil and the protective metal tube is filled with heat-resistant insulating powder such as MqO.
しかして、従来のグロープラグはヒートコイルの熱伝導
が悪く、通電してから赤熱状態に達する間での時間が長
くかかり過ぎるという欠点があり、また保護金属管が高
級耐熱鋼により構成されているため高価で、しかも耐久
性が十分でないという欠点があった。However, conventional glow plugs have the disadvantage that the heat conduction of the heating coil is poor and it takes too long to reach the red-hot state after electricity is applied, and the protective metal tube is made of high-grade heat-resistant steel. Therefore, it has the drawbacks of being expensive and not having sufficient durability.
また内部に充填されたＭｇＯが粉末状であるので、油や
水等が侵入するおそれがあり、そのシールについて極め
て慎重な対策を施す必要があった。Furthermore, since the MgO filled inside is in powder form, there is a risk that oil, water, etc. may infiltrate, and it is necessary to take extremely careful measures for sealing.
［発明の目的］
本発明はこのような問題を解消するためになされたもの
で、熱伝導性を高めて赤熱時間を短縮し、しかも耐久性
に富んだグロープラグを提供することを目的とする。[Object of the invention] The present invention was made to solve these problems, and an object of the present invention is to provide a glow plug that improves thermal conductivity, shortens the glow time, and is highly durable. .
［発明の概要］
すなわち本発明のグロープラグは、ヒートコイルの絶縁
部を△ｎＮ焼結体で形成してなることを特徴とする。[Summary of the Invention] That is, the glow plug of the present invention is characterized in that the insulating portion of the heating coil is formed of a ΔnN sintered body.
［発明の実施例コ 次に本発明の実施例について説明する。[Embodiments of the invention] Next, examples of the present invention will be described.
図面は本発明のグロープラグの一実施例を示す断面図で
ある。図において符号１はＷ −Ｍ ｏ合金等のヒート
コイル２の外周をＡＡＮ焼結体で絶縁３したセラミック
ヒータである。The drawing is a sectional view showing an embodiment of the glow plug of the present invention. In the figure, reference numeral 1 denotes a ceramic heater in which the outer periphery of a heating coil 2 made of W--Mo alloy or the like is insulated with an AAN sintered body.
ＡλＮ焼結体としては、特に５ＩＡＬＯＮ相を含まない
ものが熱伝導率が高いのでその使用が好ましい。As the AλN sintered body, it is particularly preferable to use one that does not contain the 5IALON phase because it has high thermal conductivity.
ヒートコイル２の一端は直線状となって絶縁部３を貫通
して内部保持部材４に接続されるとともに、他端はグロ
ープラグ本体５の内面に支持された接続リング６に連結
している。なお、内部保持部材４はグロープラグ本体５
の内側にシール部材７、絶縁円筒部材８等を介して取付
けられている。One end of the heating coil 2 is straight and passes through the insulating part 3 to be connected to the internal holding member 4, while the other end is connected to a connecting ring 6 supported on the inner surface of the glow plug body 5. Note that the internal holding member 4 is attached to the glow plug body 5.
It is attached to the inside of the housing via a sealing member 7, an insulating cylindrical member 8, etc.
本発明においては、セラミックヒータ１は例えばＡＡＮ
粉末を生別状の金型を使用して圧縮成形し、この半割材
の中心にＷ −Ｍ ｏ合金等からなるヒートコイルを埋
め込み、もう一方の半割材を重ねてホラ１〜プレス焼成
して製造される。In the present invention, the ceramic heater 1 is, for example, an AAN
The powder is compression molded using a mold shaped like a raw material, a heat coil made of W-Mo alloy etc. is embedded in the center of this half material, the other half material is overlapped, and press firing is performed. Manufactured by
［発明の効果］
このように構成されたグロープラグは、高い熱伝導率と
ヒートコイルとほぼ同じ熱膨張係数とを有する、高温で
の酸化安定性に優れたＡ Ｊ２Ｎ焼結体でヒートコイル
ロＳ゛絶縁されているので、耐久性に優れ、かつ赤熱時
間をより短縮することができる。[Effects of the Invention] The glow plug configured as described above is made of AJ2N sintered body having high thermal conductivity and almost the same coefficient of thermal expansion as the heating coil, and excellent oxidation stability at high temperatures. Since it is insulated, it has excellent durability and can further shorten the red-hot time.
図面は本発明の一実施例を示す縦断面図である。
１・・・・・・・・・・・・セラミックヒータ２・・・
・・・・・・・・・ピー１〜コイル３・・・・・・・・
・・・・絶縁部
５・・・・・・・・・・・・グロープラグ本体代理人弁
理士 須 山 佐 −The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1... Ceramic heater 2...
・・・・・・・・・P1~Coil 3・・・・・・・・・
・・・Insulation part 5・・・・・・・・・Patent attorney representing glow plug body Sasu Suyama −
Claims (1)
なることを特徴とするグロープラグ。 （２）ＡｐＮ焼結体は５ＩＡＬＯＮ相を含まないもので
ある特許請求の範囲第１項記載のグロープラグ。 く３）ヒートコイルはＷ −Ｍ ｏ合金からなる特許請
求の範囲第１項または第２項記載のグロープラグ。 （４）ヒートコイルはＡβＮ焼結体中に埋め込まれてい
る特許請求の範囲第１項〜第３項のいずれか１項記載の
グロープラグ。[Scope of Claims] (1) A glow plug characterized in that the insulating part of the heating coil is formed of an AβN sintered body. (2) The glow plug according to claim 1, wherein the ApN sintered body does not contain a 5IALON phase. 3) The glow plug according to claim 1 or 2, wherein the heat coil is made of a W-Mo alloy. (4) The glow plug according to any one of claims 1 to 3, wherein the heating coil is embedded in the AβN sintered body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17001182A JPS5960126A (en) | 1982-09-29 | 1982-09-29 | Glow plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17001182A JPS5960126A (en) | 1982-09-29 | 1982-09-29 | Glow plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5960126A true JPS5960126A (en) | 1984-04-06 |
Family
ID=15896930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17001182A Pending JPS5960126A (en) | 1982-09-29 | 1982-09-29 | Glow plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5960126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2642116A1 (en) * | 1989-01-20 | 1990-07-27 | Bosch Gmbh Robert | HIGH TEMPERATURE HEATING ELEMENT, PARTICULARLY FOR STARTING A DIESEL ENGINE AND METHOD FOR THE PRODUCTION THEREOF |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54100410A (en) * | 1978-01-24 | 1979-08-08 | Tokyo Shibaura Electric Co | Ceramic heat conductor |
| JPS54102635A (en) * | 1978-01-30 | 1979-08-13 | Ngk Spark Plug Co Ltd | Production of rodlike heater |
| JPS5895122A (en) * | 1981-12-01 | 1983-06-06 | Ngk Spark Plug Co Ltd | Glow plug for high temperature |
| JPS58158425A (en) * | 1982-03-15 | 1983-09-20 | Ngk Spark Plug Co Ltd | Glow plug |
-
1982
- 1982-09-29 JP JP17001182A patent/JPS5960126A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54100410A (en) * | 1978-01-24 | 1979-08-08 | Tokyo Shibaura Electric Co | Ceramic heat conductor |
| JPS54102635A (en) * | 1978-01-30 | 1979-08-13 | Ngk Spark Plug Co Ltd | Production of rodlike heater |
| JPS5895122A (en) * | 1981-12-01 | 1983-06-06 | Ngk Spark Plug Co Ltd | Glow plug for high temperature |
| JPS58158425A (en) * | 1982-03-15 | 1983-09-20 | Ngk Spark Plug Co Ltd | Glow plug |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2642116A1 (en) * | 1989-01-20 | 1990-07-27 | Bosch Gmbh Robert | HIGH TEMPERATURE HEATING ELEMENT, PARTICULARLY FOR STARTING A DIESEL ENGINE AND METHOD FOR THE PRODUCTION THEREOF |
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