JPH0291476A - Temperature measuring device for spark plug - Google Patents

Temperature measuring device for spark plug

Info

Publication number
JPH0291476A
JPH0291476A JP24158188A JP24158188A JPH0291476A JP H0291476 A JPH0291476 A JP H0291476A JP 24158188 A JP24158188 A JP 24158188A JP 24158188 A JP24158188 A JP 24158188A JP H0291476 A JPH0291476 A JP H0291476A
Authority
JP
Japan
Prior art keywords
case
shield
connector
plug
spark plug
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
Application number
JP24158188A
Other languages
Japanese (ja)
Other versions
JP2516246B2 (en
Inventor
Yoshihiro Matsubara
佳弘 松原
Shuzo Matsumura
松村 修造
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Priority to JP63241581A priority Critical patent/JP2516246B2/en
Priority to US07/378,711 priority patent/US5024534A/en
Publication of JPH0291476A publication Critical patent/JPH0291476A/en
Application granted granted Critical
Publication of JP2516246B2 publication Critical patent/JP2516246B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To provide a temperature measuring device which is good in connection with plural kinds of spark plugs and excellent in maintenance by placing an inner conductive case in an outer shield case in such a manner as to be freely drawn out, fitting a connector to a contacting tap, and detachably connecting a shield shell to a flange packing. CONSTITUTION:A temperature measuring device A is constructed so that an inner conductive case 2 accomodating a signal conversion portion is removably disposed in an outer shield case 1, a contacting tap 3 is disposed in the inner conductive case 2, a flange packing 4 is disposed in the outer shield case 1, and a female connector 6 and a shield shell 7 are fitted thereto. By this arrangement, the inner conductive case 2 can be freely taken out so as to require not so much labor for changing of batteries and inspection. Further, the signal conversion portion is used even if a plug is changed, and only parts positioned in front of the shield shell 7 and the female connector 6 may be corresponded to the plug, so that correspondence to many kinds of ignition plugs is good.

Description

【発明の詳細な説明】 「産業上の利用分野] 本発明は、エンジンの運転中における点火プラグの先端
部の温度測定装置に係わり、特に、多種類の温度測定用
の点火プラグへの接続および保守性の向上を図った測定
装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for measuring the temperature at the tip of a spark plug during operation of an engine, and particularly relates to a device for measuring the temperature at the tip of a spark plug for measuring various types of temperatures. This invention relates to a measuring device with improved maintainability.

[従来の技術] 点火プラグの温度測定は、エンジンの混合気、シリンダ
温度、吸気温度、点火時期、回転数、吸気圧、排気圧な
どを変え、燃焼状態や点火プラグの適応性を決めるため
に行う。
[Prior art] Spark plug temperature measurement is used to determine combustion conditions and spark plug adaptability by changing engine mixture, cylinder temperature, intake air temperature, ignition timing, rotation speed, intake pressure, exhaust pressure, etc. conduct.

この点火プラグの温度測定装置として、この出願人は、
つぎに述べる実開昭63−67835号公報に記載の考
案を提案している。
As this spark plug temperature measuring device, the applicant has
The following device has been proposed in Japanese Utility Model Application Publication No. 63-67835.

この装置は、点火プラグの先端部に埋設された熱電対と
、該熱電対の起電力をデジタル信号に変換するとともに
、該デジタル信号を光信号に変換して出力する信号変換
部とを備えた点火プラグの温度測定装置において、前記
信号変換部を導電体製容器内に収容するとともに、該容
器と熱電対の一端とを接続している。
This device includes a thermocouple embedded in the tip of a spark plug, and a signal converter that converts the electromotive force of the thermocouple into a digital signal, and converts the digital signal into an optical signal and outputs it. In the spark plug temperature measuring device, the signal converter is housed in a conductive container, and the container is connected to one end of a thermocouple.

[発明が解決しようとする問題点] しかるに、上記点火プラグの温度測定装置ではつぎのよ
うな欠点があった。
[Problems to be Solved by the Invention] However, the spark plug temperature measuring device described above has the following drawbacks.

(あ)温度測定用の点火プラグへ接続するケーブルは、
信号変換部に固着されているので、点火プラグの種類毎
に適合するケーブル付きの信号変換部を用意しなければ
ならない。
(A) The cable that connects to the spark plug for temperature measurement is
Since it is fixed to the signal converter, a signal converter with a cable suitable for each type of spark plug must be prepared.

(い)熱電対からのケーブルが点火用の高電圧ラインと
電気的に接続されており、このケーブルの一端と導電体
製容器が接続されているので容器は高電位となる。また
、信号変換部のアース側から容器は浮き、信号変換部は
容器により静電遮蔽されている。このため、スイッチや
ランプの容器への取付けが困難であり電池の切り忘れが
起き易く、また、容器から信号変換部が外せないので信
号変換部の点検や電池の交換がし難い、よって装置は保
守性に劣る。
(b) The cable from the thermocouple is electrically connected to the high voltage line for ignition, and one end of this cable is connected to the conductive container, so the container is at a high potential. Further, the container floats from the ground side of the signal converter, and the signal converter is electrostatically shielded by the container. This makes it difficult to attach switches and lamps to the container, making it easy to forget to turn off the battery.Also, since the signal converter cannot be removed from the container, it is difficult to inspect the signal converter or replace the battery, making it difficult to maintain the device. inferior to sex.

本発明の目的は、多種類の温度測定用の点火プラグへの
接続および保守性に優れた点火プラグの温度測定装置の
提供にある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a spark plug temperature measuring device that can be connected to spark plugs for measuring a wide variety of temperatures and is easy to maintain.

[問題点を解決するための手段] 上記目的達成のため、本発明の点火プラグの温度測定装
置は、[I]点火プラグの先端部に埋設された熱電対と
、該熱電対の起電力をデジタル信号に変換するとともに
、該デジタル信号を光信号に変換して出力する信号変換
部とを備えた点火プラグの温度測定装置において、(ア
)前記信号変換部を内部導体製ケース内に収容し、(イ
)内部導体製ケースを蓋付の外部シールドケース内に、
絶縁して出し入れ自在に載置し、(つ)シールド被覆内
に・一対の被覆導線を配してなるシールド線の、各被覆
導線の一端を前記熱電対のリード線と接続し、(1)前
記各被覆導線の他端を、外周にシールド筒が外嵌された
絶縁体製コネクタのコンタクトに接続し、且つ、シール
ド被覆の他端を前記シールド筒に接続し、(オ)前記信
号変換部に接続されている接続ビンを配設した接栓を、
前記内部導体製ケースの壁に配設し、(力)外部シール
ドケースの側壁の前記接栓に対応する位置に設けられた
穴に、フランジパツキンを周設し、(キ)前記コネクタ
は、フランジパツキンに挿脱して前記接栓に嵌まり合い
、(り)前記シールド筒は、フランジパツキンに脱着自
在に連結される構成、および、[I]前述の[I]の構
成を有し、且つ、(ケ)前記コネクタは、被覆導線が各
々接続されている2つのコンタクト以外にさらに他の2
つのコンタクトを有し、該他の2つのコンタクトがコネ
クタ側で接続されている4Pタイプとなっているか、ま
たは、前記接栓が、コネクタの挿入により信号変換部に
通電するためのスイッチが作動するようになっている構
成を採用した。
[Means for Solving the Problems] In order to achieve the above object, the spark plug temperature measuring device of the present invention includes [I] a thermocouple embedded in the tip of the spark plug, and an electromotive force of the thermocouple. In a spark plug temperature measuring device that includes a signal converter that converts the digital signal into a digital signal and outputs the digital signal by converting the digital signal into an optical signal, (a) the signal converter is housed in a case made of an internal conductor. (a) Place the internal conductor case inside the external shield case with a lid,
Connecting one end of each coated conductor to the lead wire of the thermocouple of a shield wire which is insulated and placed in such a way that it can be freely taken out and taken out, and (a) has a pair of coated conductors disposed within the shield sheath; (1) The other end of each coated conductor wire is connected to a contact of an insulator connector having a shield tube fitted around the outer periphery, and the other end of the shield coating is connected to the shield tube, and (e) the signal conversion section A faucet with a connecting bin connected to the
(g) a flange packing is provided around a hole provided on the wall of the inner conductor case, and (g) a flange packing is provided in a hole provided on a side wall of the outer shield case at a position corresponding to the plug; The shield tube is inserted into and removed from the packing and fitted into the plug, and (i) the shield tube has a configuration in which it is detachably connected to the flange packing, and [I] has the configuration of the above-mentioned [I], and (k) In addition to the two contacts to which each covered conductor is connected, the connector has two other contacts.
Either the connector is a 4P type having one contact and the other two contacts are connected on the connector side, or the connector is a switch that operates to energize the signal converter when the connector is inserted. We adopted a configuration that looks like this.

[作用および発明の効果] 本発明の点火プラグの温度測定装置は、つぎの作用およ
び効果を奏する。
[Actions and Effects of the Invention] The spark plug temperature measuring device of the present invention has the following actions and effects.

く請求項1について〉 ■信号変換部を内部導体製ケース内に収容し、該内部ケ
ースを外部ケースと絶縁して、出し入れ自在に載置して
いる。このため、信号変換部の点検が容易である。
Regarding Claim 1> (1) The signal converting section is housed in a case made of an internal conductor, and the internal case is insulated from the external case and placed in such a way that it can be taken in and taken out. Therefore, inspection of the signal conversion section is easy.

■シールド線が、シールド筒とコネクタに接続され、こ
のシールド筒、コネクタが、それぞれ、フランジパツキ
ン、接栓と取り外し自在となっている。このため、信号
変換部はプラグを変えても同一のものが使用でき、シー
ルド筒およびコネクタから先をプラグと対応させるだけ
で良い、よって、多種類の温度測定用の点火プラグへの
接続性に優れる。
■The shield wire is connected to the shield tube and connector, and the shield tube and connector can be detached from the flange packing and plug, respectively. Therefore, the same signal converter can be used even if the plug is changed, and it is only necessary to match the end of the shield tube and connector with the plug.This makes it easy to connect to many types of spark plugs for temperature measurement. Excellent.

く請求項2について〉 ■コネクタは、被覆導線が各々接続されている2つのコ
ンタクト以外にさらに他の2つのコンタクトを有し、該
他の2つのコンタクトがコネクタ側で接続されている4
Pタイプとなっているか、または、前記接栓が、コネク
タの挿入により信号変換部に通電するためのスイッチが
作動するようになっている。このため、測定の際、コネ
クタを接栓に挿すだけで信号変換部の作動が行える。
Regarding claim 2> ■ The connector has two other contacts in addition to the two contacts to which each covered conductor is connected, and the other two contacts are connected on the connector side.
The connector may be of the P type, or the connector may be configured such that a switch for energizing the signal converter is activated by insertion of the connector. Therefore, during measurement, the signal converter can be activated simply by inserting the connector into the plug.

[実施例] 次に本発明を第1図および第2図に示す一実施例に基づ
き説明する。
[Example] Next, the present invention will be explained based on an example shown in FIGS. 1 and 2.

点火プラグの温度測定装置Aは、蓋付の外部シールドケ
ース1内に、信号変換部(図示せず)を収容した内部導
体製ケース2内に取り出し自在に配設している。また、
内部導体製ケース2には、接栓3が、外部シールドケー
ス1には、フランジパツキン4が配設され、シールド線
5の他端に接続されているメスコネクタ6およびシール
ドシェルフが、それぞれ嵌め込まれる。
The spark plug temperature measuring device A is removably disposed within an external shield case 1 with a lid and an internal conductor case 2 that accommodates a signal converter (not shown). Also,
The internal conductor case 2 is provided with a plug 3, the external shield case 1 is provided with a flange packing 4, and a female connector 6 connected to the other end of the shielded wire 5 and a shield shelf are respectively fitted. .

外部シールドケース1は、静電遮蔽効果に優れたアルミ
で形成された中空の直方体の箱(y4行60mm、高さ
60mm、横85mm)で、蓋8をケース本体9の上面
開口91に外嵌している。蓋8は、下面にスポンジ81
を、さらにその下にシリコンゴムシート82をそれぞれ
貼着している。
The external shield case 1 is a hollow rectangular parallelepiped box (60 mm in 4 rows, 60 mm in height, 85 mm in width) made of aluminum with excellent electrostatic shielding effect, and the lid 8 is externally fitted into the upper opening 91 of the case body 9. are doing. The lid 8 has a sponge 81 on the bottom surface.
, and a silicone rubber sheet 82 is attached below each of them.

また、内部導体製ケース2を加圧するためのスポンジ8
3が前記シリコンゴムシート82の中央部に接着されて
いる。ケース本体9は、内壁にシリコンゴムモールド9
2が、さらにその内側には樹脂ケース(硬質塩ビ)93
がそれぞれ配置(両方で3mm〜10mmの厚さ)され
ている、この樹脂ケース93の」−両開口91側は該開
口91の中心方向に延出している。ケース本体9の一方
側面には、光ケーブル(図示せず)を通す穴94が、他
方側面にはフランジパツキン4を配設するための穴95
がそれぞれ穿設されている。また、内側底面には、受は
台96が固着されている。
Also, a sponge 8 for pressurizing the internal conductor case 2 is provided.
3 is adhered to the center of the silicone rubber sheet 82. The case body 9 has a silicone rubber mold 9 on the inner wall.
2, and inside it is a resin case (hard PVC) 93
The two openings 91 sides of this resin case 93, in which the openings 91 are respectively arranged (both have a thickness of 3 mm to 10 mm), extend toward the center of the openings 91. One side of the case body 9 has a hole 94 for passing an optical cable (not shown), and the other side has a hole 95 for installing the flange packing 4.
are drilled in each. Further, a support stand 96 is fixed to the inner bottom surface.

内部導体製ケース2は、外部シールドケースlと同様に
アルミで形成された中空の直方体の箱で、−側面には光
ファイバー(図示せず)を接続するコネクタ21が配設
され、他側面の近傍には前記信号変換部の入力端に繋る
抵抗のリード線22.23および電池の正極からのリー
ド線24、信号変換部の正極ラインからのリード112
5が配設されている。またこのケース2は、外部シール
ドケース1との間に5mm〜15mmの間隙26を設け
るとともに受は台96上に小面積で取り出し自在に配設
されている。
The internal conductor case 2 is a hollow rectangular parallelepiped box made of aluminum like the external shield case 1, and a connector 21 for connecting an optical fiber (not shown) is provided on one side, and a connector 21 for connecting an optical fiber (not shown) is provided near the other side. There are resistor lead wires 22 and 23 connected to the input end of the signal converter, a lead wire 24 from the positive electrode of the battery, and a lead 112 from the positive electrode line of the signal converter.
5 are arranged. Further, this case 2 is provided with a gap 26 of 5 mm to 15 mm between it and the external shield case 1, and the receiver is disposed on a stand 96 in a small area and can be taken out at will.

接栓3は、内部導体製ケース2の他側面に配設され、前
記リート線22.23.24.25が繋がる接続ピン(
図示せず)を配設している。ここでリード線23は内部
導体製ケース2に接続されている。
The plug 3 is arranged on the other side of the case 2 made of internal conductor, and the connecting pin (
(not shown) are installed. Here, the lead wire 23 is connected to the case 2 made of an internal conductor.

フランジパツキン4は、前記穴95にケース本体9の内
側から挿嵌される樹脂筒41と、六95との貫通部位に
、樹脂筒41の内周に配設される0リングゴム42と、
前記樹脂筒41のケース本体9の外側に出ている部分を
外嵌しケース本体9に固定し、且つ、前記シールドシェ
ルフを螺合するための外周ねじが形成された金属製のレ
セプタクル43とからなる。
The flange packing 4 includes a resin cylinder 41 that is inserted into the hole 95 from the inside of the case body 9, and an O-ring rubber 42 that is disposed on the inner periphery of the resin cylinder 41 at a penetrating portion between the six 95 and the resin cylinder 41.
A metal receptacle 43 in which a portion of the resin cylinder 41 protruding outside the case body 9 is fitted onto the case body 9 and is fixed to the case body 9, and is formed with an outer circumferential thread for screwing the shield shelf. Become.

シールド線5は、内部に1対の被覆導線51.52が洞
貫され、外周がメツシュ状のシールド被覆53で被包さ
れた絶縁耐圧50kVのCAケーブルである。シールド
被FW53の端部は、前記シールドシェルフの先端の挟
持部71で、ねじ72により圧着され、前記外部シール
ドケース1と電気的に導通が図られている。
The shielded wire 5 is a CA cable with a dielectric strength voltage of 50 kV, in which a pair of coated conductive wires 51 and 52 are penetrated, and the outer periphery is covered with a mesh-like shield coating 53. The end portion of the shielded FW 53 is crimped with a screw 72 at a clamping portion 71 at the tip of the shield shelf, and is electrically connected to the external shield case 1.

メスコネクタ6は、プラスチック等の絶縁体で形成され
、シールドシェルフに挿脱自在に嵌め込まれている、こ
の内部を前記被覆導線51.52が通り、先端部に固設
されたコンタクト61.62に接続されている。また、
コンタクト63.64は、メスコネクタ6内で接続され
ている。
The female connector 6 is made of an insulator such as plastic, and is removably fitted into the shield shelf.The coated conductive wire 51.52 passes through the inside of the female connector 6, and is connected to a contact 61.62 fixed at the tip. It is connected. Also,
Contacts 63 , 64 are connected within female connector 6 .

シールドシェルフは、導電性の金属で形成され、締付環
73を前記レセプタクル43の外周ねじと螺合させ、締
付環73が係止M74に係止されることによりレセプタ
クル43に固着している。
The shield shelf is made of conductive metal, and is fixed to the receptacle 43 by screwing a tightening ring 73 with the outer peripheral screw of the receptacle 43 and locking the tightening ring 73 with a lock M74. .

本発明の点火プラグの温度測定装fiAは、次の作用お
よび効果を奏する。
The spark plug temperature measuring device fiA of the present invention has the following functions and effects.

(か)信号変換部を内部導体製ケース2内に収容し、該
内部導体製ケース2を外部シールドケース1と絶縁して
、取り出し自在に載置している。このため、内部導体製
ケース2を外部シールドケース1から自由に取り出せる
ので電池の交換や点検などに手間がかからない。
(f) The signal converter is housed in an internal conductor case 2, and the internal conductor case 2 is insulated from the external shield case 1 and placed so as to be removable. Therefore, since the internal conductor case 2 can be freely taken out from the external shield case 1, it does not take much time to replace or inspect the battery.

(き)シールド線5の、シールド被覆53がシールドシ
ェルフに接続され、被覆導線51.52がメスコネクタ
6のコンタクト61.62と接続され、締付環73がレ
セプタクル43に螺!#され、メスコネクタ6が挿脱自
在に接栓3に嵌め込まれる。このため、信号変換部は、
プラグを変えても同一のものが使用でき、シールドシェ
ルフおよびメスコネクタ6から先をプラグと対応させる
だけで良い、よって、多種類の温度測定用の点火プラグ
への対応性が良い。
(i) The shield sheath 53 of the shield wire 5 is connected to the shield shelf, the sheathed conductors 51 and 52 are connected to the contacts 61 and 62 of the female connector 6, and the tightening ring 73 is screwed into the receptacle 43! #, and the female connector 6 is removably fitted into the connector 3. For this reason, the signal converter
Even if the plug is changed, the same one can be used, and it is only necessary to match the plug from the shield shelf and the female connector 6. Therefore, it is highly compatible with many types of spark plugs for temperature measurement.

(<)メスコネクタ6は、被覆導線51.52が各々接
続されている2つのコンタクト61.62以外にさらに
他の2つのコンタクト63.64を有し、該他の2つの
コンタクト63.64がメスコネクタ6側で接続されて
いる4Pタイプである。
(<) The female connector 6 has two contacts 63.64 other than the two contacts 61.62 to which the covered conductor wires 51.52 are respectively connected, and the other two contacts 63.64 are It is a 4P type connected on the female connector 6 side.

このため、測定の際、熱電対からのシールド線5と接続
されるメスコネクタ6を接栓3に嵌めるだけで、リード
線24.25が導通して信号変換部が作動する。
Therefore, during measurement, simply by fitting the female connector 6 connected to the shield wire 5 from the thermocouple into the connector 3, the lead wires 24 and 25 are brought into conduction and the signal converter is activated.

(け)信号変換部を内部導体製ケース2内に収容し、内
部導体製ケース2を外部シールドケース1内に絶縁して
配置している。さらに、リード線23が内部導体製ケー
ス2に接続されている。このため外部シールドケース1
は、点火プラグに印加される高電圧が内部導体製ケース
2に誘導されても電位が上り難く、載置される場所の影
響を内部導体製ケース2に与え難い、よって外部シール
ドケース1に触れても感電の心配が無いので安全性が高
い。
(k) The signal converter is housed in an inner conductor case 2, and the inner conductor case 2 is insulated and placed inside the outer shield case 1. Further, a lead wire 23 is connected to the internal conductor case 2. For this reason, external shield case 1
Even if the high voltage applied to the spark plug is induced into the internal conductor case 2, the potential does not rise easily, and the location where the spark plug is placed does not easily affect the internal conductor case 2. It is very safe as there is no fear of electric shock.

(こ)内部導体製ケース2と外部シールドケース1との
間の浮遊容量により保有される電荷がプラグの容量放電
時に、内部導体製ケース2に接続される抵抗のリード線
23を介してプラグに放出されるため内部導体製ケース
2内の回路の破壊が起き難い。
(This) When the charge held by the stray capacitance between the internal conductor case 2 and the external shield case 1 is discharged, the charge is transferred to the plug via the resistor lead wire 23 connected to the internal conductor case 2. Since it is emitted, the circuit inside the internal conductor case 2 is unlikely to be destroyed.

(さ)シールド線5の被覆導線51.52は、シールド
被覆53によって被覆され、この端部は挟持部71に接
続されている。このため点火プラグに印加される高電圧
中に重畳しているノイズはシールド線5のシールド被覆
53に捕捉され外部に漏れ難い。
(S) The covered conducting wires 51 and 52 of the shielded wire 5 are covered with a shielding covering 53, and the ends thereof are connected to the clamping part 71. Therefore, the noise superimposed on the high voltage applied to the spark plug is captured by the shield coating 53 of the shield wire 5 and is unlikely to leak to the outside.

(シ)樹脂ケース93の上面開口91側は該開口91の
中心方向に延出している。このため、内部導体製ケース
2と外部シールドケース1との絶縁性が向上する。
(b) The upper opening 91 side of the resin case 93 extends toward the center of the opening 91. Therefore, the insulation between the internal conductor case 2 and the external shield case 1 is improved.

(す)ケース2は、外部シールドケース1との間に5m
m〜15mmの間隙26が設けられている。
(S) The distance between case 2 and external shield case 1 is 5 m.
A gap 26 of m to 15 mm is provided.

このため、イグニッションコイルの二次側の高電圧ライ
ンの浮遊容量を著しく増加させない、よって、高電圧発
生回路の効率の低下や信号変換部の回路素子の破壊を招
き難い。
Therefore, the stray capacitance of the high voltage line on the secondary side of the ignition coil is not significantly increased, and therefore, the efficiency of the high voltage generation circuit is not reduced and the circuit elements of the signal conversion section are not likely to be damaged.

(せ)内部導体製ケース2は受は台96に小面積で当接
している。このため、ケース2とケース1との絶縁性に
優れる。
(S) The receiver of the case 2 made of internal conductor is in contact with the stand 96 over a small area. Therefore, the insulation between the case 2 and the case 1 is excellent.

本発明は、上記実施例以外につぎの実施悪様を含む。In addition to the embodiments described above, the present invention includes the following implementation modes.

a、絶縁体製コネクタやそのコンタクト、および接栓や
その接続ビンは、互いに異なれば嵌まり合う組合せに関
し、オス、メスの選択は自由で良い。
a. The connectors made of insulators, their contacts, and the plugs and connection bottles thereof may be freely selected as male or female in terms of fitting combinations if they are different from each other.

b、シールド筒とフランジパツキンとの連結は、螺着以
外に、脱着自在であれば圧着、嵌合なとでも良い。
b. The shield cylinder and the flange packing may be connected by crimping or fitting in addition to screwing, as long as they are detachable.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の点火プラグの温度測定装置を正面から
見た一部断面図、第2図はその組付は図である。 図中 1・・・外部シールドケース 2・・・内部導体
製ケース 3・・・接栓 4・・・フランジパツキン 
5・・・シールド線 6・・・メスコネクタ(絶縁体製
コネクタ) 7・・・シールドシェル(シールド筒) 
8・・・蓋 9・・・ケース本体 51.52・・・被
覆導線53・・・シールド被覆 61.62.63.6
4・・・コンタクト 95・・・穴 A・・・点火プラ
グの温度測定装置
FIG. 1 is a partial sectional view of the spark plug temperature measuring device of the present invention seen from the front, and FIG. 2 is a diagram showing its assembly. In the diagram 1... External shield case 2... Inner conductor case 3... Connector 4... Flange packing
5... Shield wire 6... Female connector (insulator connector) 7... Shield shell (shield tube)
8... Lid 9... Case body 51.52... Covered conductor 53... Shield coating 61.62.63.6
4... Contact 95... Hole A... Spark plug temperature measuring device

Claims (1)

【特許請求の範囲】 1)点火プラグの先端部に埋設された熱電対と、該熱電
対の起電力をデジタル信号に変換するとともに、該デジ
タル信号を光信号に変換して出力する信号変換部とを備
えた点火プラグの温度測定装置において、 (ア)前記信号変換部を内部導体製ケース内に収容し、 (イ)内部導体製ケースを蓋付の外部シールドケース内
に、絶縁して出し入れ自在に載置し、 (ウ)シールド被覆内に一対の被覆導線を配してなるシ
ールド線の、各被覆導線の一端を前記熱電対のリード線
と接続し、 (エ)前記各被覆導線の他端を、外周にシールド筒が外
嵌された絶縁体製コネクタのコンタクトに接続し、且つ
、シールド被覆の他端を前記シールド筒に接続し、 (オ)前記信号変換部に接続されている接続ピンを配設
した接栓を、前記内部導体製ケースの壁に配設し、 (カ)外部シールドケースの側壁の前記接栓に対応する
位置に設けられた穴に、フランジパッキンを周設し、 (キ)前記コネクタは、フランジパッキンに挿脱して前
記接栓に嵌まり合い、 (ク)前記シールド筒は、フランジパッキンに脱着自在
に連結されることを特徴とする点火プラグの温度測定装
置。 2)(ケ)前記コネクタは、被覆導線が各々接続されて
いる2つのコンタクト以外にさらに他の2つのコンタク
トを有し、該他の2つのコンタクトがコネクタ側で接続
されている4Pタイプとなっているか、または、 前記接栓が、コネクタの挿入により信号変換部に通電す
るためのスイッチが作動するようになつている、請求項
1記載の点火プラグの温度測定装置。
[Claims] 1) A thermocouple embedded in the tip of a spark plug, and a signal conversion unit that converts the electromotive force of the thermocouple into a digital signal, and converts the digital signal into an optical signal and outputs it. (a) the signal converter is housed in a case made of an internal conductor, and (b) the case made of an internal conductor is insulated and inserted into and taken out of an external shield case with a lid. (c) connect one end of each covered conductor of a shielded wire consisting of a pair of covered conductors arranged within a shield sheath to the lead wire of the thermocouple; (d) connect each of the covered conductors to the thermocouple lead wire; The other end is connected to a contact of an insulator connector having a shield tube fitted around the outer periphery, and the other end of the shield coating is connected to the shield tube, and (e) connected to the signal converter. A plug equipped with a connecting pin is installed on the wall of the internal conductor case, and (f) a flange packing is installed around the hole provided in the side wall of the external shield case at a position corresponding to the plug. (g) The connector is inserted into and removed from the flange packing and fitted into the plug, and (h) The shield cylinder is detachably connected to the flange packing. Device. 2) (ke) In addition to the two contacts to which each covered conductor is connected, the connector has two other contacts, and the other two contacts are connected on the connector side, making it a 4P type. 2. The spark plug temperature measuring device according to claim 1, wherein the plug is configured to actuate a switch for energizing the signal conversion section upon insertion of the connector.
JP63241581A 1988-09-27 1988-09-27 Spark plug temperature measurement device Expired - Lifetime JP2516246B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP63241581A JP2516246B2 (en) 1988-09-27 1988-09-27 Spark plug temperature measurement device
US07/378,711 US5024534A (en) 1988-09-27 1989-07-12 Temperature sensor for use in a spark plug of an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63241581A JP2516246B2 (en) 1988-09-27 1988-09-27 Spark plug temperature measurement device

Publications (2)

Publication Number Publication Date
JPH0291476A true JPH0291476A (en) 1990-03-30
JP2516246B2 JP2516246B2 (en) 1996-07-24

Family

ID=17076444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63241581A Expired - Lifetime JP2516246B2 (en) 1988-09-27 1988-09-27 Spark plug temperature measurement device

Country Status (1)

Country Link
JP (1) JP2516246B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104897305A (en) * 2015-05-12 2015-09-09 清华大学 Electric spark ignition energy calibration system under high pressure and method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56150011U (en) * 1980-04-11 1981-11-11
JPS5740812A (en) * 1980-08-25 1982-03-06 Ngk Spark Plug Co Noise suppressing wire wound resistance wire
JPS6042411U (en) * 1983-08-26 1985-03-26 株式会社 網野鉄工所 Opposing hydraulic forming device
JPS6367835U (en) * 1986-10-18 1988-05-07

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56150011U (en) * 1980-04-11 1981-11-11
JPS5740812A (en) * 1980-08-25 1982-03-06 Ngk Spark Plug Co Noise suppressing wire wound resistance wire
JPS6042411U (en) * 1983-08-26 1985-03-26 株式会社 網野鉄工所 Opposing hydraulic forming device
JPS6367835U (en) * 1986-10-18 1988-05-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104897305A (en) * 2015-05-12 2015-09-09 清华大学 Electric spark ignition energy calibration system under high pressure and method thereof

Also Published As

Publication number Publication date
JP2516246B2 (en) 1996-07-24

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