JPH036868Y2 - - Google Patents
Info
- Publication number
- JPH036868Y2 JPH036868Y2 JP6572985U JP6572985U JPH036868Y2 JP H036868 Y2 JPH036868 Y2 JP H036868Y2 JP 6572985 U JP6572985 U JP 6572985U JP 6572985 U JP6572985 U JP 6572985U JP H036868 Y2 JPH036868 Y2 JP H036868Y2
- Authority
- JP
- Japan
- Prior art keywords
- center shaft
- temperature
- blind hole
- spark plug
- optical fiber
- 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
- 239000013307 optical fiber Substances 0.000 claims description 6
- 239000003779 heat-resistant material Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005383 fluoride glass Substances 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Landscapes
- Radiation Pyrometers (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Control Of Combustion (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
点火プラグ中軸の温度は、燃焼室の温度検出や
プラグの熱価を判定するのに必要であり、この検
出器はその点火プラグ中軸の温度を検出するのに
供される。[Detailed description of the invention] Industrial application field The temperature of the center shaft of the spark plug is necessary for detecting the temperature of the combustion chamber and determining the heat value of the plug, and this detector detects the temperature of the center shaft of the spark plug. provided for.
従来技術
この種のものには、点火プラグ中軸の内部にめ
くら孔を穿ち、そのめくら孔内に熱電対温度検出
器を挿入したものがある。Prior Art Some spark plugs of this type have a blind hole drilled inside the center shaft of the spark plug and a thermocouple temperature detector inserted into the blind hole.
考案が解決しようとする問題点
しかしながら、プラグ中軸には数万ボルトに達
するイグニツシヨンパルスが生じるためその絶縁
やノイズ対策が難しく、正確な温度の検出は困難
であつた。Problems that the invention aims to solve However, since ignition pulses reaching tens of thousands of volts are generated in the center shaft of the plug, insulation and noise countermeasures are difficult, and accurate temperature detection has been difficult.
問題点を解決するための手段
本考案は、上記問題点を解決するために光の利
用を考えたものであり、点火プラグ中軸の内部に
穿つためくら孔に耐熱性の高い材料よりなる光フ
アイバを挿入したことを特徴とするものである。Means for Solving the Problems The present invention considers the use of light in order to solve the above problems, and an optical fiber made of a highly heat-resistant material is installed in the blind hole drilled inside the center shaft of the spark plug. It is characterized by the insertion of.
作 用
以上のものにおいて、中軸の温度に応じてその
分光放射輝度が変化し、それが光フアイバを介し
て外部に取出される。以下、これを赤外線検出器
により電気信号に変換し、温度と輝度、波長の関
係に応じてその電気信号をリニアライズさせるこ
とにより中軸温度が測定される。尚、電気信号に
変換する代りに、直接輝度を基準の輝度と比較す
ることにより温度を求めるようにしてもよい。Function In the above system, the spectral radiance changes depending on the temperature of the central axis, and is extracted to the outside via an optical fiber. Thereafter, this is converted into an electric signal by an infrared detector, and the central axis temperature is measured by linearizing the electric signal according to the relationship between temperature, brightness, and wavelength. Note that instead of converting into an electrical signal, the temperature may be determined by directly comparing the brightness with a reference brightness.
実施例
第１図において、１０は点火プラグであり、そ
の中軸１１にはめくら孔１２が穿たれ、その内部
に耐熱性の高い材料、例えばフツ化ガラス系の光
フアイバ１３が挿入、固定され、中軸の温度によ
り輝度の変化する光を外部に取出している。Embodiment In FIG. 1, 10 is a spark plug, the center shaft 11 of which has a blind hole 12, into which an optical fiber 13 made of a highly heat-resistant material such as fluoride glass is inserted and fixed. Light whose brightness changes depending on the temperature of the central axis is extracted to the outside.
考案の効果
以上のとおりであり、本考案は高耐熱性材料よ
りなる光フアイバをプラグ中軸に挿入して温度を
光の利用により検出するので、耐圧力、耐ノイズ
および絶縁性の高い温度検出器となり、簡単、確
実に温度検出ができる。Effects of the invention As described above, the present invention detects the temperature by using light by inserting an optical fiber made of a highly heat-resistant material into the center shaft of the plug, so it is a temperature detector with high pressure resistance, noise resistance, and insulation. This allows for easy and reliable temperature detection.
第１図は、本考案の実施例を示す一部断面を有
する正面図である。
１１……中軸、１２……めくら孔、１３……光
フアイバ。
FIG. 1 is a partially sectional front view showing an embodiment of the present invention. 11...Center shaft, 12...Blind hole, 13...Optical fiber.
Claims (1)
めくら孔に耐熱性の高い材料よりなる光フアイバ
を挿入したところのプラグ中軸温度検出器。 A spark plug center shaft temperature detector is made by drilling a blind hole inside the spark plug center shaft and inserting an optical fiber made of a highly heat resistant material into the blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6572985U JPH036868Y2 (en) | 1985-05-01 | 1985-05-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6572985U JPH036868Y2 (en) | 1985-05-01 | 1985-05-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61181879U JPS61181879U (en) | 1986-11-13 |
| JPH036868Y2 true JPH036868Y2 (en) | 1991-02-20 |
Family
ID=30597988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6572985U Expired JPH036868Y2 (en) | 1985-05-01 | 1985-05-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH036868Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63144221A (en) * | 1986-12-06 | 1988-06-16 | Ngk Spark Plug Co Ltd | Temperature measurement type plug by infrared ray |
-
1985
- 1985-05-01 JP JP6572985U patent/JPH036868Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61181879U (en) | 1986-11-13 |
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