JPS6184538A - Detector of combustion pressure of engine - Google Patents
Detector of combustion pressure of engineInfo
- Publication number
- JPS6184538A JPS6184538A JP20557284A JP20557284A JPS6184538A JP S6184538 A JPS6184538 A JP S6184538A JP 20557284 A JP20557284 A JP 20557284A JP 20557284 A JP20557284 A JP 20557284A JP S6184538 A JPS6184538 A JP S6184538A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- combustion
- detector
- engine
- combustion pressure
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 53
- 230000037431 insertion Effects 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000203 mixture Substances 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Testing Of Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
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燃焼圧力またはノッキングの検出器
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an engine combustion pressure or knock detector.
（従来技術及びその問題点）
従来、エンジンの燃焼圧力の発生に伴なうシリンダヘッ
ド及びシリンダブロックの機械的応力変化を受圧してこ
れを電気信号に変えて出力し、前記燃焼圧力を検知する
単一の検呂器本体をケースに内蔵して成る燃焼圧力検出
器は公知である。このような燃焼圧力検出器を１個用い
て、互いに隣接する燃焼室の燃焼圧力を検知する場合、
一般には該検出器を互いに隣接する燃焼室相互間に位置
して、該検出器とシリンダヘッドに対しては遊嵌状態で
シリンダブロックに対してのみ螺合されるボルトにより
シリンダヘッド上面に取付けていた。(Prior art and its problems) Conventionally, the combustion pressure is detected by receiving mechanical stress changes in the cylinder head and cylinder block due to the generation of engine combustion pressure, converting this into an electrical signal and outputting it. 2. Description of the Related Art Combustion pressure detectors having a single pressure detector body built into a case are known. When detecting the combustion pressures of adjacent combustion chambers using one such combustion pressure detector,
Generally, the detector is located between adjacent combustion chambers, and is attached to the upper surface of the cylinder head with a bolt that is loosely fitted between the detector and the cylinder head and is screwed only into the cylinder block. Ta.
ところで、燃焼室の燃焼圧力はシリンダヘッドの押上げ
力として作用し、該押上げ力は前記ボルトがシリンダブ
ロックに螺合固定されていることにより該検出器に対し
て圧縮力として作用するので、これを該検出器が受圧し
て電気信号に変換して出力することにより当該燃焼圧力
を検出するようになされているが、シリンダヘッドは複
数本のボルトによりシリンダブロックに固定されている
ため、燃焼圧力により前記検出器に作用する圧縮力はそ
の取付ボルトの軸心を介した一側と他側では均等に伝達
されずに差異が生ずる。By the way, the combustion pressure in the combustion chamber acts as a pushing force on the cylinder head, and this pushing force acts as a compressive force on the detector due to the bolt being screwed and fixed to the cylinder block. The detector receives this pressure, converts it into an electrical signal, and outputs it to detect the combustion pressure, but since the cylinder head is fixed to the cylinder block with multiple bolts, the combustion pressure The compressive force that acts on the detector due to pressure is not transmitted equally between one side and the other side via the axis of the mounting bolt, resulting in a difference.
従って上記単一の圧力検出体をケースに内蔵して成る従
来の燃焼圧力検出器においては、高精度でエンジンの燃
焼圧力を検出することが困段であるという不具合があっ
た。Therefore, in the conventional combustion pressure detector in which the single pressure detecting element is built into the case, there is a problem in that it is difficult to detect the combustion pressure of the engine with high accuracy.
（発明の目的）
本発明は上記事情に鑑みてなされたもので、エンジンの
燃焼圧力をより精度の高い状態で検出することを目的と
している。(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to detect combustion pressure of an engine with higher accuracy.
（問題点を解決するための手段）
上記目的を達成するために本発明においては、中央に取
付ボルトの挿通孔を有し、圧力検出体を内蔵する検出器
を前記挿通孔を挿通する取付ボルトにてエンジンに締結
するエンジンの燃焼圧力検出器において、前記圧力検出
体を複数個の独立した検出体で構成したことを特徴とす
るエンジンの燃焼圧力検出器を提供するものである。(Means for Solving the Problems) In order to achieve the above object, the present invention has an insertion hole for a mounting bolt in the center, and a mounting bolt for inserting a detector having a built-in pressure sensor into the insertion hole. The present invention provides a combustion pressure detector for an engine, which is connected to an engine in a combustion engine, characterized in that the pressure detector is constituted by a plurality of independent detectors.
（発明の実施例）
以下１本発明の一実施例を添付図面に基づいて説明する
。(Embodiments of the Invention) An embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図中１，２はシリンダ、３ａ、３ｂはピストン、４
ａ、４ｂは燃焼室、５はシリンダヘッド、６はシリンダ
ブロックであり、シリンダヘッド５は図示しない複数本
のシリンダヘッドボルトによって前記シリンダブロック
６に固着されている。In Fig. 1, 1 and 2 are cylinders, 3a and 3b are pistons, and 4
a, 4b are combustion chambers, 5 is a cylinder head, and 6 is a cylinder block, and the cylinder head 5 is fixed to the cylinder block 6 by a plurality of cylinder head bolts (not shown).
該シリンダヘッド５の幅方向−側上面には、互いに隣り
合うシリンダ１と２の略中間位置にこれらシリンダ１と
２に可能な限り近接させて取付けられているボルト７に
より、燃焼室４ａと４ｂの燃焼圧力を検出する本発明の
ワッシャ型の燃焼圧力検出器８が金属製ワッシャ９を介
して取付けられている。前記ボルト７は金属製ワッシャ
９、燃焼圧力検出器８．シリンダヘッド５に対して遊嵌
状態にあり、シリンダブロック６に対してのみ螺合して
いる。Combustion chambers 4a and 4b are attached to the upper surface of the cylinder head 5 on the widthwise side by means of bolts 7 which are installed at approximately midpoint between the adjacent cylinders 1 and 2 and as close as possible to these cylinders 1 and 2. A washer-type combustion pressure detector 8 of the present invention is attached via a metal washer 9 for detecting the combustion pressure. The bolt 7 has a metal washer 9 and a combustion pressure detector 8. It is loosely fitted into the cylinder head 5 and is threaded only into the cylinder block 6.
前記燃焼圧力検出器８は燃焼室４ａと４ｂの燃焼圧力が
シリンダヘッド５及びシリンダブロック６に機械的応力
振動として伝達されるのでその応力振動を感知し、それ
を電気信号として出力するようになされていて、第２図
及び第３図に示すように互いに独立する平面略１／２円
弧状の圧力検出体Ａ、Ｂと、これら圧力検出体Ａ、Ｂを
収容する平面円形状の金属製のケース１０とから成る。The combustion pressure detector 8 senses the stress vibrations as the combustion pressures in the combustion chambers 4a and 4b are transmitted to the cylinder head 5 and the cylinder block 6 as mechanical stress vibrations, and outputs them as electrical signals. As shown in FIGS. 2 and 3, there are pressure sensing bodies A and B that are approximately 1/2 circular arc in plan and independent of each other, and a metal metal body that is circular in plan and accommodates these pressure sensing bodies A and B. It consists of case 10.
前記圧力検出体Ａ、Ｂは互いに同一構成であるから、一
方の圧力検出体Ａについてのみ説明し、他方の圧力検出
体Ｂについては図面の同一部分に同一符号を付してその
説明を省略する。Since the pressure detecting bodies A and B have the same configuration, only one pressure detecting body A will be explained, and the same reference numerals will be given to the same parts in the drawings of the other pressure detecting body B, and the explanation thereof will be omitted. .
圧力検出体Ａは、電極板１１の上下面に圧電体１２．１
２’を添装し、これら電極板１１と圧電体１２．１２’
の周側面全体に亘って電気絶縁部材１３を添装し、更に
、前記上部圧電体１２の上面及び下部圧電体１２′の下
面に受圧板１４及び１４′を夫々添装し、更に前記電極
板１１から電気信号を搬送するリード線１５を延出せし
めて構成されている。The pressure sensing body A has piezoelectric bodies 12.1 on the upper and lower surfaces of the electrode plate 11.
2' and these electrode plates 11 and piezoelectric bodies 12 and 12'
An electrical insulating member 13 is attached to the entire circumferential side of the electrode plate, and pressure receiving plates 14 and 14' are attached to the upper surface of the upper piezoelectric body 12 and the lower surface of the lower piezoelectric body 12', respectively. A lead wire 15 for transmitting an electric signal extends from the lead wire 11.
前記ケース１０は大径環状の外側ケース部材１０ａと前
記取付ボルト７の軸部７ａが嵌挿される挿通孔１６を有
する小径環状の内側ケース部材１０ｂとから成り、外側
ケース部材１０ａが前記爾圧力検出体Ａ、Ｂの外周に嵌
合され、且つ内側ケース部材１０ｂが前記同圧力検出体
Ａ、Ｂの内周部へ嵌合されている。前記外側ケース部材
１０ａ及び内側ケース部材１０ｂの各上端縁部を同圧力
検出体Ａ、Ｂの上部受圧板１４の上面に折曲係止させ、
且つ前記外側ケース部材１０ａ及び内側ケース部材ＬＯ
ｂの各下端縁部を同圧力検出体Ａ、Ｂの下部受圧板１４
′の下面に折曲係止させることにより、同圧力検出体Ａ
、Ｂ及び内、外側ケース部材１０ｂ、１０ａが互いに一
体化されている。この状態においては同圧力検出体Ａ、
Ｂは内側ケース部材１０ｂの軸心、即ちボルト７の軸心
を中心にその両側に等配してケース１０に内蔵されてい
る。The case 10 is composed of a large-diameter annular outer case member 10a and a small-diameter annular inner case member 10b having an insertion hole 16 into which the shaft portion 7a of the mounting bolt 7 is inserted, and the outer case member 10a is used for detecting the pressure. The inner case member 10b is fitted onto the inner periphery of the pressure detecting bodies A and B. The upper end edges of the outer case member 10a and the inner case member 10b are bent and locked to the upper surface of the upper pressure receiving plate 14 of the pressure detecting bodies A and B,
and the outer case member 10a and the inner case member LO
The lower edge of each pressure sensor b is attached to the lower pressure receiving plate 14 of the same pressure detecting body A, B.
By bending and locking the lower surface of the pressure sensor A
, B and the inner and outer case members 10b and 10a are integrated with each other. In this state, the same pressure detector A,
B are housed in the case 10 so as to be equally spaced on both sides of the axis of the inner case member 10b, that is, the axis of the bolt 7.
前記外側ケース部材１０ａの外周面所定箇所には導出パ
イプ１０Ｃが突設されており、前記同圧力検出体Ａ、Ｂ
から延出するリード線１５．１５が夫々前記導出パイプ
ｌｏｃ内を通ってケース１０の外方へ導出されてエンジ
ン外部の電気検出回路（図示省略）に接続される。A lead-out pipe 10C is protruded from a predetermined location on the outer circumferential surface of the outer case member 10a, and the pressure detectors A and B
Lead wires 15 and 15 extending from the lead wires 15 and 15 are led out of the case 10 through the lead-out pipes loc, respectively, and connected to an electric detection circuit (not shown) outside the engine.
（作用）
次に上記構成の本発明の燃焼圧力検出器による検出作用
を簡単に説明する。(Function) Next, the detection function of the combustion pressure detector of the present invention having the above configuration will be briefly explained.
燃焼室４ａ、４ｂ内の混合気が図示しない点火プラグに
よって点火され、燃焼（爆発）が生じると、この燃焼圧
力が圧力波となって燃焼室４ａ。When the air-fuel mixture in the combustion chambers 4a, 4b is ignited by a spark plug (not shown) and combustion (explosion) occurs, this combustion pressure becomes a pressure wave and causes the combustion chamber 4a.
４ｂを覆うシリンダヘッド５とシリンダブロック６とに
機械的応力振動を生ゼしぬ、この振動によりボルト７の
締付トルクの変化とシリンダヘッド５とシリンダブロッ
ク６との間の接合圧力の変化とが生じ、これらの振動及
び圧力変化によってボルト７に取付けられた本発明の検
出器８が燃焼室４ａ、４ｂの燃焼圧力を検出するわけで
あるが、ここで、・前述のように該検出器８は単一のケ
ース１０に互いに独立する二分割構造の圧力検出体Ａ。This vibration causes changes in the tightening torque of the bolts 7 and changes in the joint pressure between the cylinder head 5 and the cylinder block 6. occurs, and these vibrations and pressure changes cause the detector 8 of the present invention attached to the bolt 7 to detect the combustion pressure in the combustion chambers 4a, 4b. 8 is a pressure sensing body A having a two-part structure that is independent of each other in a single case 10;
Ｂをボルト７の軸心を中心にその両側に等配して内蔵さ
れているため、第４図に示すように該圧力検出体Ａ、Ｂ
のうち各々に近い位置にある燃焼室、即ち第４図中矢印
で示す如く一方の圧力検出体Ａで一方の燃焼室４ａの燃
焼圧力を、他方の圧力検出体Ｂで他方の燃焼室４ｂの燃
焼圧力が夫々検出されるものである。Since the pressure sensing elements A and B are built in and are equally spaced on both sides of the bolt 7, as shown in FIG.
In other words, as shown by the arrows in FIG. 4, one pressure sensor A measures the combustion pressure in one combustion chamber 4a, and the other pressure sensor B measures the combustion pressure in the other combustion chamber 4b. The combustion pressure is detected respectively.
なお、上記実施例においては受圧板１４．１４’と外側
ケース部材１０ａ及び内側ケース部材１０ｂとを別体に
構成した場合について説明したが、これに限られること
なく、これらを一体構成として受圧板１４．１４’が内
、外側ケース部材１０ｂ。In the above embodiment, the case where the pressure receiving plate 14, 14', the outer case member 10a, and the inner case member 10b are constructed separately is explained, but the present invention is not limited to this, and the pressure receiving plate can be constructed by integrally constructing these. 14. 14' are the inner and outer case members 10b.
１０ａをも兼ねるようにしてもよい。10a may also be used.
また、本実施例では燃焼圧力検出器に２個の圧力検出体
を内蔵した場合について述べたが、これに限られず、３
個以上の複数個の圧力検出体を内蔵しても実施できるこ
とは言うまでもない。Further, in this embodiment, a case has been described in which two pressure detecting bodies are built into the combustion pressure detector, but the present invention is not limited to this.
Needless to say, the present invention can be implemented even if a plurality of pressure sensing bodies are built in.
（発明の効果）
以上詳述した如く本発明によれば、中央に取付ボルトの
挿通孔を有し、圧力検出体を内蔵する検出器を前記挿通
孔を挿通する取付ボルトにてエンジンに締結するエンジ
ンの燃焼圧力検出器において、前記圧力検出体を複数個
の独立した検出体で構成したことを特徴とするので、従
来の如く単一ケースに圧力検出体を１個内蔵した場合に
比べ、取付ボルトの軸心を介した一側と他側の圧力検出
体にて各々に近い位置にある燃焼室の燃焼圧力を夫々独
自に検出するため、従来に比して燃焼圧力の検出精度が
高くなるという効果がある。(Effects of the Invention) As detailed above, according to the present invention, a detector having a mounting bolt insertion hole in the center and containing a pressure detecting element is fastened to the engine with a mounting bolt inserted through the insertion hole. The engine combustion pressure detector is characterized in that the pressure detector is composed of a plurality of independent detectors, so it is easier to install than when one pressure detector is built into a single case as in the past. Since the pressure detectors on one side and the other side of the bolt axis independently detect the combustion pressure in the combustion chambers located close to each side, the detection accuracy of combustion pressure is higher than before. There is an effect.
第１図乃至第４図は本発明の一実施例を示し。
第１図は本発明に係る燃焼圧力検出器を取付けたエンジ
ンの縦断面図、第２図は同燃焼圧力検出器の縦断面図、
第３図は同燃焼圧力検出器の一部切欠平面図、第４図は
同燃焼圧力検出器の検出分担を示すエンジンの平面図で
ある。1 to 4 show one embodiment of the present invention. FIG. 1 is a longitudinal sectional view of an engine equipped with a combustion pressure detector according to the present invention, and FIG. 2 is a longitudinal sectional view of the same combustion pressure detector.
FIG. 3 is a partially cutaway plan view of the combustion pressure detector, and FIG. 4 is a plan view of the engine showing the detection portion of the combustion pressure detector.
Claims (1)
蔵する検出器を前記挿通孔を挿通する取付ボルトにてエ
ンジンに締結するエンジンの燃焼圧力検出器において、
前記圧力検出体を複数個の独立した検出体で構成したこ
とを特徴とするエンジンの燃焼圧力検出器。1. In a combustion pressure detector for an engine, which has a mounting bolt insertion hole in the center and has a built-in pressure detector and is fastened to the engine with a mounting bolt inserted through the insertion hole,
A combustion pressure detector for an engine, characterized in that the pressure detector is composed of a plurality of independent detectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20557284A JPS6184538A (en) | 1984-10-02 | 1984-10-02 | Detector of combustion pressure of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20557284A JPS6184538A (en) | 1984-10-02 | 1984-10-02 | Detector of combustion pressure of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6184538A true JPS6184538A (en) | 1986-04-30 |
| JPH0354771B2 JPH0354771B2 (en) | 1991-08-21 |
Family
ID=16509108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20557284A Granted JPS6184538A (en) | 1984-10-02 | 1984-10-02 | Detector of combustion pressure of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6184538A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179857A (en) * | 1990-05-31 | 1993-01-19 | Kistler Instrumente Ag | Monitoring system for cyclically operating machines |
| US5440933A (en) * | 1993-04-10 | 1995-08-15 | Robert Bosch Gmbh | Pressure sleeve |
| EP1713134A1 (en) * | 2005-04-14 | 2006-10-18 | Delphi Technologies, Inc. | Vibration sensor and method for its production |
| JP2009535628A (en) * | 2006-05-04 | 2009-10-01 | キストラー ホールディング アクチエンゲゼルシャフト | Piezoelectric measuring element with lateral effect and sensor including said measuring element |
| JP2012507694A (en) * | 2008-11-04 | 2012-03-29 | ピエツォクリスト・アドヴァンスト・ゼンゾリクス・ゲー・エム・ベー・ハー | Force measuring ring with annular housing |
| CN112067268A (en) * | 2020-08-31 | 2020-12-11 | 南京航空航天大学 | Aircraft engine high pressure rotor simulation tester who contains a plurality of tang bolted connection faces |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57151838A (en) * | 1981-03-16 | 1982-09-20 | Nippon Soken Inc | Knocking detector for internal-combustion engine |
-
1984
- 1984-10-02 JP JP20557284A patent/JPS6184538A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57151838A (en) * | 1981-03-16 | 1982-09-20 | Nippon Soken Inc | Knocking detector for internal-combustion engine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179857A (en) * | 1990-05-31 | 1993-01-19 | Kistler Instrumente Ag | Monitoring system for cyclically operating machines |
| US5440933A (en) * | 1993-04-10 | 1995-08-15 | Robert Bosch Gmbh | Pressure sleeve |
| EP1713134A1 (en) * | 2005-04-14 | 2006-10-18 | Delphi Technologies, Inc. | Vibration sensor and method for its production |
| JP2009535628A (en) * | 2006-05-04 | 2009-10-01 | キストラー ホールディング アクチエンゲゼルシャフト | Piezoelectric measuring element with lateral effect and sensor including said measuring element |
| JP2012507694A (en) * | 2008-11-04 | 2012-03-29 | ピエツォクリスト・アドヴァンスト・ゼンゾリクス・ゲー・エム・ベー・ハー | Force measuring ring with annular housing |
| CN112067268A (en) * | 2020-08-31 | 2020-12-11 | 南京航空航天大学 | Aircraft engine high pressure rotor simulation tester who contains a plurality of tang bolted connection faces |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0354771B2 (en) | 1991-08-21 |
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