JPS6046439A - Combustion monitoring device - Google Patents

Combustion monitoring device

Info

Publication number
JPS6046439A
JPS6046439A JP15305883A JP15305883A JPS6046439A JP S6046439 A JPS6046439 A JP S6046439A JP 15305883 A JP15305883 A JP 15305883A JP 15305883 A JP15305883 A JP 15305883A JP S6046439 A JPS6046439 A JP S6046439A
Authority
JP
Japan
Prior art keywords
sensor
retaining ring
cylinder
hole
cylinder 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.)
Pending
Application number
JP15305883A
Other languages
Japanese (ja)
Inventor
Kuniaki Sawamoto
沢本　国章
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP15305883A priority Critical patent/JPS6046439A/en
Publication of JPS6046439A publication Critical patent/JPS6046439A/en
Pending legal-status Critical Current

Links

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
    • G01L23/22—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 for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE:To hold an in-cylinder pressure monitoring sensor attached onto an engine wall regardless whether an ignition plug and a bolt are attached or not by fixing an in-cylinder pressure transmission member in a fitting hole while holding the in-cylinder pressure monitoring sensor between the bottom surface of a cylinder hole and the reverse surface of a retaining ring. CONSTITUTION:The fitting hole 6B screws the ignition plug 6 and the cylinder hole 11 is bored concentrically with the center line of the fitting hole 6B. The diameter of the cylinder 11 matches with the external diameter of a combustion monitoring sensor 1, and the reverse surface of the sensor 1 is held in contact with the bottom surface 11A of the cylinder hole 11. The retaining ring 12 has an abutment in a pistion ring shape. Then while the sensor 1 is held abutting on the bottom surface 11A of the cylinder hole, the retaining ring 12 is compressed and fitted in the cylinder hole 11 until the reverse surface of the retaining ring 12 contacts the top surface of the sensor 1, and the retaining ring 12 is expanded by elasticity to press the flank of the cylinder hole 11, thus holding the sensor 1.

Description

【発明の詳細な説明】 本発明は燃焼監視装置に関し、特に点火栓等の座金の位
置に取付けて機関の筒内圧を検知する燃焼監視装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion monitoring device, and more particularly to a combustion monitoring device that is attached to a washer of a spark plug or the like to detect the cylinder pressure of an engine.

気筒内における燃焼状態が直接反映される筒駕内圧を検
知することにより、エンジンの点火時期等の運転状態に
かかわる要素を制御することは広く知られており、この
種の燃焼監視装置として、圧！素子を組込み、点火栓の
座金位置等に取付けるようにしたｍ焼監視センサによる
ものがある。It is widely known that elements related to engine operating conditions, such as ignition timing, can be controlled by detecting the cylinder internal pressure, which directly reflects the combustion condition in the cylinder. ! There is a combustion monitoring sensor that incorporates an element and is attached to the washer position of the spark plug.

第１図（４）および第１図中）はこのような従来の燃焼
監視センサの一例（特公昭ダ／−５１５９号参照）を示
し、ここで、センサｌは環状に形成された圧電素子−と
圧電素子コの上下に配置された電極３とをモールド成形
により一体化した座金型に構成されており、その圧ｉｔ
＠子コの間に挾持された中央電極３Ａには電荷取出し用
の信号線グが設けられている。FIG. 1 (4) and FIG. and electrodes 3 placed above and below the piezoelectric element are integrated into a washer type by molding, and the pressure
The central electrode 3A held between the two electrodes is provided with a signal line for extracting charges.

更に、第一図はこのような燃焼監視センサｌがシリンダ
ヘッド、夕の頂部に装着された状態ご示し、センサ／は
点火栓６をシリンダヘッドＳに螺着す　′する際、ヘッ
ドタ側の取付座りＡと点火栓ｔの締着座６Ａとの間に介
装されるもので、点火栓６の螺着の際にセンサｌには初
期圧が加えられるが、このような状態にあって、筒内圧
が燃焼によって高められると、点火栓６が上方に押上げ
られることによって初期圧が低められる。Furthermore, Figure 1 shows such a combustion monitoring sensor l installed on the top of the cylinder head.When screwing the spark plug 6 onto the cylinder head S, the sensor must be installed on the head side. It is interposed between the seat A and the tightening seat 6A of the spark plug t, and when the spark plug 6 is screwed on, an initial pressure is applied to the sensor l. When the internal pressure is increased by combustion, the initial pressure is lowered by pushing the ignition plug 6 upward.

しかして、センサ／に発止する圧力変化はそのまま圧得
、笈子−に伝達され、圧積素子コでは圧力欽化に対応し
た電荷が発生するので、この電荷２信号４υダから取出
すことにより蛤焼状態の監視や割部を行うことができる
。Therefore, the pressure change that occurs in the sensor is directly transmitted to the pressure element, and a charge corresponding to the pressure change is generated in the pressure element, so by extracting this charge from the 2 signal 4υ It is possible to monitor the state of clam grilling and to cut the parts.

しかしながら、このような従来のｍ焼監視センサＧｊ１
点火栓６をシリンダヘッド５に螺着する際に、点火栓乙
とシリンダヘッド！との間に座金の場合と同様な享順で
取付１プられており、点火栓６を取外すたびごとにセン
・すｌもまた外されることになり、再装着に゛手間がか
がるのみならず、再装着の際にセンサｌの上下面におけ
る接触状態が異なってくるため＼センサ／から得られる
出力特性が変化してしまう。However, such a conventional m-burn monitoring sensor Gj1
When screwing the ignition plug 6 onto the cylinder head 5, connect the ignition plug B and the cylinder head! It is installed in the same way as the washer, and each time the spark plug 6 is removed, the sensor and slider must also be removed, making reinstallation time-consuming. In addition, since the contact state between the upper and lower surfaces of the sensor l changes when it is reattached, the output characteristics obtained from the sensor l change.

本発明の目的は、このような従来の問題点に着目し、点
火栓やボルトと共に装着するものにあって、これらの点
火栓やボルトの着脱にかかわりなくエンジン携に装着し
た状態が保持できる燃焼監視装置を提供することにある
〇 かかる目的を連成するために、本発明では、エンジン外
壁にお（プる燃焼監視センづ取付は位置に、センサの外
周部を底入させる円筒形の孔を分設してこの円筒孔の底
面にセンサの下面を陪座さゼるようになし、更にセンサ
を着Ｐ；４さぜた円筒孔に上方から止め輪を底入させて
この止め輪をそのばね力により円筒孔の側壁に圧着させ
ると共に止め幅）下’ｔｌをセンサの上面部に当接させ
て、以てセンサをその状態に保持させるようにする。The purpose of the present invention is to focus on these conventional problems, and to provide a combustion engine that is attached to the engine together with the spark plug and bolts, and which allows the spark plugs and bolts to remain attached to the engine regardless of whether they are attached or removed. To provide a monitoring device, the present invention provides a combustion monitoring sensor with a cylindrical hole in which the outer periphery of the sensor is inserted into the bottom. Separate the cylindrical hole so that the lower surface of the sensor is seated on the bottom surface of this cylindrical hole, and then attach the sensor. The spring force causes the sensor to be pressed against the side wall of the cylindrical hole, and the lower part of the stopper width ('tl) is brought into contact with the upper surface of the sensor, thereby holding the sensor in that state.

以下に、図、面に基づいて本発明の詳細な説明する０ 第３図（Ａ）および第３図（Ｂ）は本発明の一１！、垂
力を示す。本例は点火栓乙の取付位置に設ける場合を示
し〜ここで、６Ｂは点火栓ａｈｇ着する取付孔であり、
／／はこの取付孔６Ｂの中心線と同心に穿設した円筒孔
である。この円筒孔ｉｉの径を燃焼監視センサｌの外径
に合わせて形成し、更に、円筒孔１７の底面／／Ａにセ
ンサｌの下面が接触を保つようにする。Below, the present invention will be described in detail based on figures and surfaces. FIG. 3(A) and FIG. 3(B) are part of the present invention! , indicating normal force. This example shows the case where the ignition plug AHG is installed at the installation position ~ Here, 6B is the installation hole where the ignition plug AHG is installed
// is a cylindrical hole drilled concentrically with the center line of this attachment hole 6B. The diameter of this cylindrical hole ii is formed to match the outer diameter of the combustion monitoring sensor l, and the lower surface of the sensor l is kept in contact with the bottom surface //A of the cylindrical hole 17.

／−はピストンリング状の合口／、２Ｊを有する止め輪
であり、センサ／を図に示すように円筒孔底面／／Ａに
当接させた状態で、止め輪／−の径ご圧縮して円筒孔ｌ
／に嵌入れ、止め輪ｌａの下面をセンサ／の上面←当接
させると共に、止め輪／コをそのばね力により拡大させ
て円筒孔／／の側面にＦＦ、着させ、以てこの止め輪／
コによりセンサｌをこの状態に保持させることができる
。/- is a retaining ring with a piston ring-shaped abutment /, 2J, and with the sensor / in contact with the bottom surface of the cylindrical hole //A as shown in the figure, compress the diameter of the retaining ring /-. Cylindrical hole l
/, and bring the lower surface of the retaining ring la into contact with the upper surface of the sensor/, and at the same time, expand the retaining ring la by its spring force and attach it to the side of the cylindrical hole //, thereby tightening the retaining ring. /
The sensor 1 can be held in this state by .

なお、このように止め輪／、２を取付けた状態での止め
輪／、２の内径Ｄ／を、点火栓６の締着座６Ａの外径り
、２より大きくしておくことにより、センサ／の上面と
点火栓ｔの＃着ｍａＡとの間に十分な接触を保たせるよ
うにＴることができる。In addition, by making the inner diameter D/ of the retaining ring /, 2 with the retaining ring /, 2 attached in this way larger than the outer diameter 2 of the tightening seat 6A of the ignition plug 6, the sensor / T can be adjusted so as to maintain sufficient contact between the top surface of the spark plug t and the #maA of the spark plug t.

このように構成し７１：ｆ＃、焼監視装置にあっては、
センサ／が点火栓６の着脱とは係ゎｒ）なく、円筒孔／
／とこの円筒孔／／に嵌入させた止め＠７．２とによっ
て抑止された状態に保持されるので、点大栓乙３取外す
ことによってセンサ／が外れるようなことがなくなり、
更にこのために誘起されるようなセンサｌの特性変化を
防止することができる。In the thus configured 71:f# burn monitoring device,
The sensor / is not related to the attachment and detachment of the spark plug 6, and the cylindrical hole /
Since it is held in a restrained state by / and the stopper @7.2 fitted into this cylindrical hole //, the sensor / will not come off when the large point plug Otsu 3 is removed.
Furthermore, it is possible to prevent changes in the characteristics of the sensor l that would be caused by this.

第１図は、本発明の他の実施例を示す。本例は、シリン
ダヘッド５をシリンダブロック７に固着するシリンダヘ
ッドボルトｔにセン゛すｌを装着する場合を示し、ここ
で、コ／はボルト孔ＪＡの中心線と同心に穿設した円筒
孔である。FIG. 1 shows another embodiment of the invention. This example shows the case where a sensor l is attached to a cylinder head bolt t that fixes a cylinder head 5 to a cylinder block 7, where ko/ is a cylindrical hole drilled concentrically with the center line of the bolt hole JA. It is.

本例においても、第３図（ＡＪおよび第３図Ｃｌ５）の
場合と同様にして、この円筒孔コ／にセンサ／？底入れ
てから、止め輪工によってセン°すｌを円筒孔コ／の底
面、２／Ａに拘止させた状態に保持させることができる
。なお、ここで、センサ／の外径、円筒孔の径および止
め輪の内外の径を設定するにあたっては１ポル）ｆｆの
座面Ａ’Ｂが直接センサｌの上面に当接してボルト８に
かがる荷重の変化がセンサｌに伝達されるようにする。In this example, similarly to the case of FIG. 3 (AJ and FIG. 3 Cl5), the sensor/? After bottoming out, the center ring can be held in a locked state at the bottom surface of the cylindrical hole 2/A using a retaining ring. In addition, when setting the outer diameter of the sensor /, the diameter of the cylindrical hole, and the inner and outer diameters of the retaining ring, make sure that the bearing surface A'B of 1pol) ff is in direct contact with the top surface of the sensor l and the bolt 8 is The change in load caused by bending is transmitted to sensor l.

以上説明してきたように、不発ｔ１）Ｊによれば一、座
金型筒内圧監視センサを設けるエンジン外壁の位置に、
このセンサの夕１径に合わせた円筒孔を、筒内圧伝達部
材の取付孔の中心線と同心に設けて、この円筒孔によっ
て形成される底面にセンサの下面を着座させへこのセン
サの上面に、内僧石へ尼着させる止め輪の下面を当接さ
せて、以て、センサを円筒孔の底面と止め輪の下面との
間に拘持させ、更に、センツの上面に筒内圧伝達部材の
筒内圧伝達面２当接させるようにしたので、従来のよう
に、筒内圧伝達部材を取外子たびごとにセンサも夕（さ
れてしまいその再装備に手間のかかるようなことがなく
、特に再装備の際にセンサの接触状態が戊なってくるた
めにその出力特性が変化してしまうのを防止Ｔることか
できる。As explained above, according to misfire t1)J, the position on the outer wall of the engine where the washer type cylinder pressure monitoring sensor is installed
A cylindrical hole that matches the diameter of this sensor is provided concentrically with the center line of the mounting hole of the cylinder pressure transmitting member, and the lower surface of the sensor is seated on the bottom surface formed by this cylindrical hole, and the upper surface of this sensor is , the lower surface of the retaining ring to be attached to the inner stone is brought into contact with the sensor, and the sensor is held between the bottom surface of the cylindrical hole and the lower surface of the retaining ring. Since the cylinder pressure transmitting surface 2 is brought into contact with the cylinder pressure transmitting surface 2, there is no need to replace the sensor every time the cylinder pressure transmitting member is removed, which takes time and effort to reinstall. In particular, it is possible to prevent the output characteristics from changing due to the contact state of the sensor decreasing when the sensor is reinstalled.

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

第１図仏）および第１図串）は従来の座金型燃焼監視上
ンザのｆｌ′ｆｊ成の一例を示すそれぞれ平面図および
そのＴ−１線ｒｔｒｉｆｆｉｌｆｆｌ、第一図はその燃
焼監視センサを点火栓と共に装着した状態を示す断面図
、 第３回位）は本発明燃焼監視装置の構成の一例を示す断
面６カ、 第３図ＣＢ）は１ｌｉｌｌ、７図ｃＡ）ご矢印Ａの方向
から見た側面図、 第１図は本発明の他の実施例として、シリンダヘラ）’
ホ／ｌｚ）に適用した場合の例を示すＭｉＴｉｌｉＤで
ある。 ｌ・・・センサ、 コ・・・圧？Ｉ！、素子、 ３．３Ａ・・・環１萌、 り・・・信号線、 り・・・シリンダヘッド、 ｋＡ　・・・取イ柑　１４工、 ６・・・点火栓、 ＡＡ・・・篩着座、 ６Ｂ・・・取イ（）孔、 ７・・・シリンダブロック〜 ｔ・・・シリンダヘッドボルト、 ８人・・・ボルト孔、 εＢ・・中座面、 ／／、、２か・・円筒孔、 ／／Ａ、、２／Ａ・・・底面、 ／、２・・・止め輪、 ｌＡＡ・・・合口、 Ｄ／、Ｄコ・・・径。 第１図（Ａ） 第１図（Ｂ） Ａ ６Ｂ　＋１Ａ　５ 第３図（Ｂ）Figure 1) and Figure 1) are a plan view and T-1 line rtriffilffl of a conventional washer-type combustion monitoring sensor, respectively, and Figure 1 is a diagram showing an example of the configuration of a conventional washer-type combustion monitoring sensor. 3) is a sectional view showing an example of the configuration of the combustion monitoring device of the present invention; Figure 1 is a side view of a cylinder spatula as another embodiment of the present invention.
MiTiliD is an example of the case where it is applied to l...sensor, c...pressure? I! , Element, 3.3A...Ring 1 moe, Ri...Signal line, Ri...Cylinder head, kA...Torikan 14, 6...Spark plug, AA...Sieve seat , 6B...Take () hole, 7...Cylinder block ~ t...Cylinder head bolt, 8...Bolt hole, εB...Inner seating surface, //,, 2...Cylinder Hole, //A,, 2/A...Bottom surface, /, 2...Retaining ring, lAA...Abutment, D/, Dco...Diameter. Figure 1 (A) Figure 1 (B) A 6B +1A 5 Figure 3 (B)

Claims (1)

【特許請求の範囲】 筒内圧監視センサを配置するエンジン外壁に、該筒内圧
監視センサの外径に合わせた円筒孔を、筒内圧伝達部材
の取付孔と同心に設け、前記円筒孔の底面に前記筒内圧
監視センサの下面をＭＦｉＡさせて、該筒内圧監視セン
サの上面に、前記円筒孔に嵌着させた止め輪の下面を当
接させ、前記筒内圧監視センサを前記円筒孔の底面と前
記止め輪の下面との間に保持させた状態で前記筒内圧伝
達部材な前記取付孔に固着したこと【特徴とする燃焼監
視装置。[Scope of Claims] A cylindrical hole matching the outer diameter of the cylinder pressure monitoring sensor is provided on the outer wall of the engine where the cylinder pressure monitoring sensor is disposed, and is concentric with the mounting hole of the cylinder pressure transmission member, and the bottom surface of the cylindrical hole is provided with a cylindrical hole that matches the outer diameter of the cylinder pressure monitoring sensor. The lower surface of the cylinder pressure monitoring sensor is subjected to MFiA, and the lower surface of the retaining ring fitted in the cylindrical hole is brought into contact with the upper surface of the cylinder pressure monitoring sensor, so that the cylinder pressure monitoring sensor is connected to the bottom surface of the cylindrical hole. A combustion monitoring device characterized in that the retaining ring is fixed to the mounting hole of the cylinder pressure transmitting member while being held between the retaining ring and the lower surface of the retaining ring.
JP15305883A 1983-08-24 1983-08-24 Combustion monitoring device Pending JPS6046439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15305883A JPS6046439A (en) 1983-08-24 1983-08-24 Combustion monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15305883A JPS6046439A (en) 1983-08-24 1983-08-24 Combustion monitoring device

Publications (1)

Publication Number Publication Date
JPS6046439A true JPS6046439A (en) 1985-03-13

Family

ID=15554056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15305883A Pending JPS6046439A (en) 1983-08-24 1983-08-24 Combustion monitoring device

Country Status (1)

Country Link
JP (1) JPS6046439A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58161000A (en) * 1982-03-19 1983-09-24 三菱電機株式会社 Voice synthesizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58161000A (en) * 1982-03-19 1983-09-24 三菱電機株式会社 Voice synthesizer

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