JPS59216028A - Pressure indicator for internal combustion engine - Google Patents
Pressure indicator for internal combustion engineInfo
- Publication number
- JPS59216028A JPS59216028A JP9002483A JP9002483A JPS59216028A JP S59216028 A JPS59216028 A JP S59216028A JP 9002483 A JP9002483 A JP 9002483A JP 9002483 A JP9002483 A JP 9002483A JP S59216028 A JPS59216028 A JP S59216028A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- sensor
- internal combustion
- receiving rod
- pressure receiving
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 13
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- 239000000567 combustion gas Substances 0.000 claims abstract description 9
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 5
- 229910052582 BN Inorganic materials 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
- G01L23/10—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by pressure-sensitive members of the piezoelectric type
Abstract
Description
【発明の詳細な説明】
本発明は内燃機関のガス圧力を測定する指圧器に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acupressure device for measuring gas pressure in an internal combustion engine.
従来の内燃機関用指圧器は、シリンダ内の燃焼ガス圧力
をピストンや、ダイヤフラム、又は板で受け、その変位
及び変形を機械的、光学的、或は電気的に伝達、拡大、
記録する方法がとられている。しかし、高温・高圧の燃
焼ガスにさらされ、長期に亘る使用に耐えて、現場用と
して実用に供されるものは少ない。この原因は受圧部の
焼損、及び未燃焼カーボンの堆積に起因し、時間経過と
ともに検出部の性能が劣化する等の欠点があった。Conventional acupressure instruments for internal combustion engines receive the pressure of combustion gas in a cylinder with a piston, diaphragm, or plate, and mechanically, optically, or electrically transmit, expand, and transmit the displacement and deformation.
A method of recording is being taken. However, there are few that can withstand exposure to high-temperature, high-pressure combustion gas, long-term use, and are put to practical use in the field. This was caused by burnout of the pressure receiving part and the accumulation of unburned carbon, which resulted in drawbacks such as deterioration of the performance of the detection part over time.
本発明は従来の欠点を解除するため、受圧に経時変化の
少ない耐熱性に優れたセラミックス棒を使用することに
よって、カーボンの堆積する空間を無くシ、燃焼ガスの
圧力波を受圧棒の先端で受け、他端に接続するセンサに
伝達し、圧力信号を電気信号に変換して取り出すことを
目的としている。In order to eliminate the conventional drawbacks, the present invention eliminates the space where carbon can accumulate by using a ceramic rod with excellent heat resistance that does not change over time for the pressure receiving rod, and the pressure waves of the combustion gas are transmitted at the tip of the pressure receiving rod. The purpose is to receive the pressure signal, transmit it to the sensor connected to the other end, and convert the pressure signal into an electrical signal for extraction.
本発明を内燃機関用指圧器として実施した実施例を図面
にもとついて説明すれば次の通りである。An embodiment in which the present invention is implemented as an acupressure device for an internal combustion engine will be described below with reference to the drawings.
第１図示のものは本発明を既設の指圧器弁に取り付けて
使用する実施態様の一例である。The first illustration is an example of an embodiment in which the present invention is attached to an existing acupressure valve.
外筐１の上部に上蓋２をネジ締結して筐体をＭＧ成し、
筐体の中心の上部にセッチングスクリュー３を、底部に
受圧＃５ｆ：設置し、判者間にセンサ６を保持する。セ
ンサ６はセッチングスクリュー３の締め方を調節するこ
とにより、予め一定の圧力下で支持されている。ナツト
４はセッチングスクリューの緩み止めである。A top cover 2 is screwed to the top of an outer casing 1 to form a MG casing.
A setting screw 3 is installed at the top of the center of the casing, and a pressure receiving #5f is installed at the bottom, and the sensor 6 is held between the readers. The sensor 6 is supported in advance under a constant pressure by adjusting how the setting screw 3 is tightened. Nut 4 is used to prevent the setting screw from loosening.
センサ６の構造は中央に半球状の突起をもつ凸形の六方
晶雪化硼素成形体の上部材７と、同じ材質形状の下部材
７′の間に、電極膜９．９′を密着させた圧電セラミッ
クス８を挟んで積層し、外部を四フッ化エチレン樹脂膜
の外被ＩＯで包装している。The structure of the sensor 6 is such that an electrode film 9,9' is placed in close contact between an upper member 7 of a convex hexagonal boron snowcide molded body having a hemispherical protrusion in the center and a lower member 7' of the same material shape. The piezoelectric ceramics 8 are laminated with the piezoelectric ceramics 8 sandwiched therebetween, and the outside is wrapped with an outer sheath IO made of a polytetrafluoroethylene resin film.
圧電セラミックス８はキュリ一点の高いジルコン酸チタ
ン酸鉛の焼結体で、分極処理が施しである。The piezoelectric ceramic 8 is a sintered body of lead zirconate titanate with a single Curie point, and has been subjected to polarization treatment.
受圧棒５は上部に鍔５′をもち、パツキンリング１３．
１３′を介して外筐ｌの下部と、ニップル１４の間に保
持され１いる。パツキンリング１３，１：￥は厚さｌｉ
ｎの銅を使用した。受圧棒５の材質は六方晶窒化硼素の
ホットプレス成型体を精密仕上げ加工して製作した。仕
上精度は０．０１ ｍ＋が可能である。成型体のバイン
ダーとして、Ｂ、０８、Ｓｉｎ、又はＭ！０．・Ｓｉｎ
。The pressure receiving rod 5 has a flange 5' at the top, and a packing ring 13.
It is held between the lower part of the outer casing 1 and the nipple 14 via 13'. Patsukin ring 13,1: ¥ is thickness li
n copper was used. The material of the pressure receiving rod 5 was manufactured by precision finishing a hot press molded body of hexagonal boron nitride. Finishing accuracy of 0.01 m+ is possible. As a binder for the molded body, B, 08, Sin, or M! 0.・Sin
.
などを適当な割合で使用したものはいずれも使用できる
。受圧４１！５とニップル１４のはめ合い部分の隙間は
０．０５ ｍ程度に加工したが、小さければ小さいほど
良い。はめ合い部に部分的な直接接触が生じても、窒化
硼素の潤滑性のため高温下でも焼き付くことはない。受
圧棒の熱膨張は鍔５′より下部が燃焼室側に伸び、上部
がセンサ側に伸びるので、筐体の熱膨張量と相殺するよ
うに受圧棒の上部高さを設計し、熱膨張の影響をゼロ圧
することができる。You can use any of the following in appropriate proportions. The gap between the fitting part of the pressure receiver 41!5 and the nipple 14 was machined to about 0.05 m, but the smaller the better. Even if there is partial direct contact between the fitting parts, boron nitride's lubricity prevents seizure even at high temperatures. Thermal expansion of the pressure receiving rod extends from the flange 5' to the combustion chamber side and the upper part to the sensor side, so the height of the upper part of the pressure receiving rod is designed to offset the amount of thermal expansion of the casing. The impact can be zero pressure.
燃焼ガスの圧力波は受圧棒５の先端から棒内を伝播して
、他端に接続したセンサ６に達し、圧電セラミックス８
に印加し、ピエゾ電気を発生させる。電荷は電極膜９．
９′に接続したリード線１１．１１’を通ってプラグ１
２のピン１３，１３’から外部に取り出される。The pressure waves of the combustion gas propagate inside the rod from the tip of the pressure receiving rod 5, reach the sensor 6 connected to the other end, and the piezoelectric ceramic 8
is applied to generate piezoelectricity. The charge is on the electrode film 9.
Plug 1 through lead wire 11 and 11' connected to 9'.
It is taken out from the second pin 13, 13'.
機関本体の指圧器弁への本指圧器の取り付けは、弁口部
（図示していない）にニップル１４を挿入し、袋ナツト
１５を回転させ装着する。袋ナツト１５はまわしやすく
するため数個の突起１６を外周に設けている。To attach this acupressure device to the acupressure device valve of the engine main body, insert the nipple 14 into the valve opening (not shown) and rotate the cap nut 15 to install it. The cap nut 15 is provided with several protrusions 16 on its outer periphery to make it easier to turn.
第２図示のものは本発明を機関本体に直接取り付ける他
の実施態様を示すもので、外筐ｌと上蓋２で構成される
筐体の中央にセツチングスクリュー３と受圧棒５でセン
サ６を保持し、外筐ｌを貫通するボルト１８で機関本体
１９に取り付けられている。１３．１３’は銅のパツキ
ンリングである。１２はプラグ、１０はリード線でおる
。受圧棒５の上部にコイル状の冷却管１７が埋め込まれ
、水冷却することにより燃焼室からの伝熱の影響を防ぐ
、受圧棒の熱膨張は燃焼室側に伸びるためセンサに影響
を及を丁さない。受圧棒の材質は金属材料ではフェライ
ト差支はオーステナイト系の耐熱鋼が、セラミックスで
は炭化珪素＜ ＳｔＣ）、窒化珪素（Ｓ３Ｎ４） 又
は窒化硼素（Ｂ Ｎ）等が使用できる。The second figure shows another embodiment in which the present invention is directly attached to the engine body, in which a sensor 6 is installed in the center of the casing consisting of an outer casing 1 and an upper lid 2 using a setting screw 3 and a pressure receiving rod 5. It is attached to the engine body 19 with a bolt 18 that passes through the outer casing 1. 13.13' is a copper packing ring. 12 is a plug, and 10 is a lead wire. A coiled cooling pipe 17 is embedded in the upper part of the pressure receiving rod 5, and water cooling prevents the influence of heat transfer from the combustion chamber.Thermal expansion of the pressure receiving rod extends toward the combustion chamber, so it does not affect the sensor. It doesn't work. As for the material of the pressure receiving rod, austenitic heat-resistant steel can be used for the ferrite support, and silicon carbide < StC), silicon nitride (S3N4), or boron nitride (BN) can be used for the ceramic material.
機関本体には運転中に様々な振動が発生伝達しておシ、
センサがノイズとしてそれらを拾い上げることを防ぎ、
高Ｓ／Ｎ比の信号をうるため筐体の材質を検討したとこ
ろ、Ｍｎ −Ｃｕ系及びＭｎ−Ｃｕ−ＡＬ系防振合金が
最も良い結果がえられ、次が１２Ｃｒ系フエライト鋼で
おった。Various vibrations are generated and transmitted to the engine body during operation.
Prevents the sensor from picking up them as noise,
When considering the material of the housing to obtain a signal with a high S/N ratio, we found that Mn-Cu and Mn-Cu-AL vibration damping alloys gave the best results, followed by 12Cr ferrite steel. .
なお、センサは外部よＱＤＣ５Ｖのバイアス電圧をチャ
ージアンプから印加され、発生信号を取り出し、オツシ
ロスコーブ、アナログデジタル変換器、プリンター等の
公知の技術により表示・記録することができる。Note that a QDC 5V bias voltage is externally applied to the sensor from a charge amplifier, and the generated signal can be extracted and displayed and recorded using known techniques such as an oscilloscope, an analog-to-digital converter, and a printer.
上記のように本発明はシリンダ内の燃焼ガス圧力を高Ｓ
／Ｎ比で電気信号として取り出すことができ、受圧棒に
セラミックスを使用しているため耐熱性に優れ、疲労や
焼損が少なく、耐久性がち９、固有振動数が高いため高
速現象に追随でき、高速内燃機関の燃焼ガス圧力ばかシ
でなく、ノッキング等の突発現象も観測できる特徴をも
っている。As described above, the present invention increases the combustion gas pressure in the cylinder to a high S.
/N ratio, it can be extracted as an electrical signal, and because the pressure receiving rod is made of ceramics, it has excellent heat resistance, less fatigue and burnout, and is highly durable9.It has a high natural frequency, so it can follow high-speed phenomena. It has the characteristic of being able to observe not only fluctuations in combustion gas pressure in high-speed internal combustion engines, but also sudden phenomena such as knocking.
第１図は本発明の第１実施９１１の断面図で、第２図は
第２実施例の断面図である。
図中、１は外筺、２は上蓋、３はセソチングスクリュー
、５は受圧棒、６はセンサ、１８はボルト、１９は機関
本体。
特許出願人 磯 山 醇 二
茅土の
第２■FIG. 1 is a sectional view of a first embodiment 911 of the present invention, and FIG. 2 is a sectional view of a second embodiment. In the figure, 1 is the outer casing, 2 is the top cover, 3 is the sesoching screw, 5 is the pressure receiving rod, 6 is the sensor, 18 is the bolt, and 19 is the engine body. Patent applicant: Isoyama No. 2
Claims (1)
圧器において、筐体の中央にセンサをセッチングスクリ
ューと受圧棒によって一定の予圧を与えて保持し、燃焼
ガス圧力を筐体に固定した受圧棒に受けて、センサに伝
達させることを特徴とする内燃機関用指圧器。 ２ 筐体の部材がＭｎ−Ｃｕ系、又はＭｎ −Ｃｕ −
ＡＬ系の防振合金であるところの特許請求の範囲第１項
記載の内燃機関用指圧器。 ＆ センサの構造が圧電セラミックスを六方晶窒化硼素
成型体の凸形状の上・下部材で挟んで、外被を四フッ化
エチレン樹脂膜で包んで構成したところの特許請求の範
囲第１項記載の内燃機関用指圧器。 ４、゛受圧棒の部材がセラミックス、とくに炭化珪素、
窒化珪素又は窒化硼素の成型体でおるところの特許請求
の範囲第１項記載の内燃機関用指圧器。[Claims] 1. In an internal combustion engine acupressure device that uses piezoelectric ceramics as a sensor, the sensor is held in the center of the housing by applying a constant pre-pressure using a setting screw and a pressure receiving rod, and the combustion gas pressure is controlled by the housing. An acupressure device for an internal combustion engine, characterized in that the pressure is received by a pressure receiving rod fixed to the body and transmitted to a sensor. 2 The housing member is Mn-Cu based or Mn-Cu-
The acupressure device for an internal combustion engine according to claim 1, which is made of an AL-based vibration-proofing alloy. & Claim 1, wherein the structure of the sensor is constituted by sandwiching a piezoelectric ceramic between convex upper and lower members of a hexagonal boron nitride molded body, and wrapping the outer cover with a polytetrafluoroethylene resin film. Acupressure device for internal combustion engines. 4. ``The pressure receiving rod member is made of ceramics, especially silicon carbide,
The acupressure device for an internal combustion engine according to claim 1, which is made of a molded body of silicon nitride or boron nitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9002483A JPS59216028A (en) | 1983-05-24 | 1983-05-24 | Pressure indicator for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9002483A JPS59216028A (en) | 1983-05-24 | 1983-05-24 | Pressure indicator for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59216028A true JPS59216028A (en) | 1984-12-06 |
Family
ID=13987116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9002483A Pending JPS59216028A (en) | 1983-05-24 | 1983-05-24 | Pressure indicator for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59216028A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118643U (en) * | 1991-04-04 | 1992-10-23 | 日本特殊陶業株式会社 | piezoelectric sensor |
| WO2005071379A1 (en) | 2004-01-21 | 2005-08-04 | Priamus System Technologies Ag | Sensor comprising a modular connection |
| WO2006032152A1 (en) * | 2004-09-22 | 2006-03-30 | Kistler Holding Ag | Pressure sensor |
| WO2019028488A1 (en) * | 2017-08-07 | 2019-02-14 | Piezocryst Advanced Sensorics Gmbh | Piezoelectric device having at least one piezoelectric element |
-
1983
- 1983-05-24 JP JP9002483A patent/JPS59216028A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118643U (en) * | 1991-04-04 | 1992-10-23 | 日本特殊陶業株式会社 | piezoelectric sensor |
| WO2005071379A1 (en) | 2004-01-21 | 2005-08-04 | Priamus System Technologies Ag | Sensor comprising a modular connection |
| EP1714127B1 (en) * | 2004-01-21 | 2012-06-06 | Priamus System Technologies AG | Sensor comprising a modular connection |
| WO2006032152A1 (en) * | 2004-09-22 | 2006-03-30 | Kistler Holding Ag | Pressure sensor |
| US7472600B2 (en) | 2004-09-22 | 2009-01-06 | Kistler Holding Ag | Pressure sensor |
| WO2019028488A1 (en) * | 2017-08-07 | 2019-02-14 | Piezocryst Advanced Sensorics Gmbh | Piezoelectric device having at least one piezoelectric element |
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