JPS6366431A - Apparatus for detecting combustion state of engine - Google Patents

Apparatus for detecting combustion state of engine

Info

Publication number
JPS6366431A
JPS6366431A JP21196286A JP21196286A JPS6366431A JP S6366431 A JPS6366431 A JP S6366431A JP 21196286 A JP21196286 A JP 21196286A JP 21196286 A JP21196286 A JP 21196286A JP S6366431 A JPS6366431 A JP S6366431A
Authority
JP
Japan
Prior art keywords
combustion state
cylinder head
electrode
engine
gap sensor
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
JP21196286A
Other languages
Japanese (ja)
Inventor
Noboru Hashimoto
昇 橋本
Tadashi Nakagawa
正 中川
Akio Nagao
長尾 彰士
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
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 Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP21196286A priority Critical patent/JPS6366431A/en
Publication of JPS6366431A publication Critical patent/JPS6366431A/en
Pending legal-status Critical Current

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  • Measuring Fluid Pressure (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To detect the combustion state of a required area with high accuracy without imparting restriction to the arrangement position of a sensor, by arranging the ion gap sensor adjacent to a combustion chamber to the matching surface of a cylinder head and a cylinder block in an insulating manner. CONSTITUTION:A cylinder head 4 is mounted to the upper end of a cylinder block earthed through two gaskets 2, 3 and a combustion chamber 6 is formed between the upper part of a piston 5 and the lower surface of a cylinder head 4. The electrode 8 of an ion gap sensor 7 is arranged so as to be held between two gaskets 2, 3 of the matching surface of the cylinder head 4 and the cylinder block 1. The electrode 8 is covered with an insulating seal material 9, for example, composed of a tetrafluoroethylene resin or silicone rubber. By this constitution, the electrode 8 can be simply arranged, for example, to the required area of an end gas zone or a bore entire periphery.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、燃焼室で点火燃焼した高温イオン化ガスに
電圧を印加することで、燃焼状態に対応したイオン電流
を1ηるようなイオンギャップセンサを備えたエンジン
の燃焼状態検知装置に関する。
Detailed Description of the Invention (Field of Industrial Application) This invention provides an ion gap sensor that increases the ion current corresponding to the combustion state by 1η by applying a voltage to the high temperature ionized gas ignited and burned in the combustion chamber. The present invention relates to a combustion state detection device for an engine.

(従来技術) 従来、上述例のイオンギャップセンサを備えた装置とし
ては、例えば特開昭49−19211公報に記載の装置
がある。
(Prior Art) As a conventional device equipped with the ion gap sensor of the above-mentioned example, there is, for example, a device described in Japanese Patent Application Laid-Open No. 49-19211.

すなわち、排気通路内にイオンギャップセンサを臨設し
て、このセンサでミスフフイ17(失火、不点火のこと
)を検出するように構成した装置であるが、この装置は
燃焼後の状態を検出するもので、実際の燃焼室内での燃
焼状態を検出することは困難である。
In other words, this device is configured to have an ion gap sensor installed in the exhaust passage and use this sensor to detect misfire 17 (misfire, misfire), but this device detects the state after combustion. Therefore, it is difficult to detect the actual combustion state inside the combustion chamber.

そこで、上述の燃焼室内での燃焼状態を直接検出するた
めには、シリンダヘッドに上述のイオンギャップセンサ
を取付けることが考えられるが、このようにシリンダヘ
ッドにイオンギャップセンサを取付けると、同ヘッドに
は冷却水通路、オイル通路等が高占右率で存在する関係
上、イオンギャップセンサの取付構造が複雑化するばか
りでなく、同センサの配設位置が大幅にai+1約され
るので、要求部位の燃焼状態を高精度に検出することが
比較的困難な問題点を有していた。
Therefore, in order to directly detect the combustion state in the combustion chamber, it is possible to attach the above-mentioned ion gap sensor to the cylinder head, but if the ion gap sensor is attached to the cylinder head in this way, Because cooling water passages, oil passages, etc. occupy a high proportion, not only does the installation structure of the ion gap sensor become complicated, but the sensor's installation position is significantly reduced by ai+1, so the required location is The problem was that it was relatively difficult to detect the combustion state of the fuel with high precision.

(発明の目的) この発明は、イオンギャップを特異な部位に配設するこ
とで、このセンサの配設位置に制約を受けることがなく
、要求部位の燃焼状態を高精度に検出することができる
エンジンの燃焼状態検知装置の提供を目的とする。
(Purpose of the Invention) By arranging the ion gap at a specific location, the present invention is able to detect the combustion state of the required location with high precision without being restricted by the location of the sensor. The purpose is to provide an engine combustion state detection device.

(発明の構成) この発明は、燃焼室に臨設するイオンギャップセンサの
少なくとも一方を、シリンダヘッドとシリンダブロック
との合せ面に絶縁配設したエンジンの燃焼状態検知装置
であることを特徴とする。
(Structure of the Invention) The present invention is characterized in that it is an engine combustion state detection device in which at least one of the ion gap sensors installed in the combustion chamber is insulated and disposed on the mating surface of the cylinder head and the cylinder block.

(発明の効果) この発明によれば、冷却水通路やオイル通路等の占有率
の低い上述の合せ面にイオンギャップセンサを配設した
ので、このイオンギャップセンサの配設位置に制約を受
けることがなく、例えばエンドガスゾーンおよびボア全
周等の要求部位に配置することができ、この結果、斯る
要求部位の燃焼状態を高精度に検出することができる効
果がある。
(Effects of the Invention) According to the present invention, since the ion gap sensor is arranged on the above-mentioned mating surface where the occupancy rate of the cooling water passage, oil passage, etc. is low, there is no restriction on the arrangement position of the ion gap sensor. It can be placed at required locations such as the end gas zone and the entire circumference of the bore, and as a result, the combustion state in such required locations can be detected with high precision.

(実施例) この発明の一実施例を以下図面に基づいて詳述する。(Example) An embodiment of the present invention will be described in detail below based on the drawings.

図面はエンジンの燃焼状態検知装置を示し、第1図にお
いて、アース接地されたシリンダブロック1の上端には
2枚のガスケット2.3を介してシリンダヘッド4を取
付け、ピストン5上部とシリンダヘッド4下面との間に
燃焼室6を形成している。
The drawing shows a combustion state detection device for an engine. In FIG. 1, a cylinder head 4 is attached to the upper end of a grounded cylinder block 1 via two gaskets 2. A combustion chamber 6 is formed between the lower surface and the lower surface.

そして上述のシリンダヘッド4とシリンダブロック1と
の合せ面、具体的には上述の2枚のガスケット2.3間
にはイオンギャップセンサ7の電極8・・・を挟持状に
配設している。
Electrodes 8 of the ion gap sensor 7 are sandwiched between the mating surfaces of the cylinder head 4 and the cylinder block 1, specifically between the two gaskets 2.3. .

上述の電極8は絶縁性シール材9で第3図に示す如く被
覆している。このシール材9としては、例えば4弗化エ
チレン樹脂コート、ポリイミドフィルム、シリコンゴム
等を用いる。
The above-mentioned electrode 8 is covered with an insulating sealant 9 as shown in FIG. As this sealing material 9, for example, a tetrafluoroethylene resin coat, a polyimide film, silicone rubber, etc. are used.

ところで、前述の2枚のガスケット2.3は第2図乃至
第4図に示す如くアルミニウム製芯材10をアスベスト
11でサンドイッチ状に挟持して構成したもので、これ
ら上下のガスケット2.3を保護環としてのグロメット
12で一体化している。
By the way, the two gaskets 2.3 mentioned above are constructed by sandwiching an aluminum core material 10 with asbestos 11 as shown in FIGS. 2 to 4, and these upper and lower gaskets 2.3 are It is integrated with a grommet 12 as a protective ring.

そして、このグロメット12に第2図、第3図に示すよ
うなスリット状の開口部13もしくは第4図に示すよう
な丸孔状の開口部14を形成し、上述の開口部13もし
くは14を介して前述の電極8の先端を燃焼室6内に臨
設している。
Then, a slit-shaped opening 13 as shown in FIGS. 2 and 3 or a round-hole-shaped opening 14 as shown in FIG. The tip of the aforementioned electrode 8 is provided in the combustion chamber 6 via the combustion chamber 6.

上述のイオンギャップセンサ7は、この電極8と、接地
電極としてのシリンダヘッド4、シリンダブロック1も
しくはグロメット12との両者によりイオンギャップ機
能を発揮し、直接エンジンの燃焼状態を検知すると共に
、燃焼状態に対応した出力を発生するセンサである。
The above-mentioned ion gap sensor 7 exhibits an ion gap function by both this electrode 8 and the cylinder head 4, cylinder block 1, or grommet 12 as a ground electrode, and directly detects the combustion state of the engine. This is a sensor that generates an output corresponding to the

このように上述のイオンギャップセンサ7、詳しくは同
センサ7の検出部としての電極8を、シリンダヘッド4
とシリンダブロック1との合せ面に配設している。この
合せ面は冷却水通路やオイル通路等がせばまって、その
占有率が低いので、電極8の配設位置に制約を受けるこ
とがなく、第2図に示すようにエンドガスゾーンおよび
ボア全周などの要求部位に簡単に配置することができる
ので、このような要求部位の燃焼状態を高精度に検出す
ることができる。
In this way, the above-mentioned ion gap sensor 7, more specifically, the electrode 8 as the detection part of the sensor 7, is connected to the cylinder head 4.
and the cylinder block 1. Since this mating surface has a narrow cooling water passage, an oil passage, etc., and its occupancy rate is low, there is no restriction on the placement position of the electrode 8, and the end gas zone and bore as shown in FIG. Since it can be easily placed at required locations such as all around the circumference, the combustion state of such required locations can be detected with high accuracy.

第5図は上述のイオンギャップセンサ7をノックセンサ
として用いる場合の制御回路ブロック図で、CPU20
はイオンギャップセンサ7からのイオン信号および点火
信号の各出力に基づいて、ROM15に格納されたプロ
グラムに沿って点火時期制tlII装置16を駆動制御
し、またRAM17はそれぞれの負荷状態に対応した火
炎到達時間などの必要なデータを記憶する。
FIG. 5 is a control circuit block diagram when the above-mentioned ion gap sensor 7 is used as a knock sensor.
Based on the ion signal and ignition signal output from the ion gap sensor 7, the ignition timing control tlII device 16 is driven and controlled according to the program stored in the ROM 15, and the RAM 17 controls the flame timing control device 16 according to the program stored in the ROM 15. Stores necessary data such as arrival time.

このように構成した燃焼状態検知装置の動作を第6図の
フローチャートを参照して説明する。
The operation of the combustion state detection device configured as described above will be explained with reference to the flowchart shown in FIG.

第1ステツプ21で、CPU20は点火信号を検出し、
次の第2ステツプ22で、CPU20はイオンギャップ
センサ7からのイオン信号を検出する。
In a first step 21, the CPU 20 detects an ignition signal,
In the next second step 22, the CPU 20 detects the ion signal from the ion gap sensor 7.

次に第3ステツプ23で、CPU20はイオン信号検出
時点から点火信号検出時点を減障して火炎到達時間へt
を演算する。
Next, in a third step 23, the CPU 20 reduces the ignition signal detection time from the ion signal detection time to the flame arrival time t.
Calculate.

次に、第4ステツプ24で、CP U 20は上述の火
炎到達時間△tが第7図に示す負荷pbと進角■qとの
関係f(Pb、Ig)よりも小さいか否か、つまり△t
<f (Pb、IQ)か否かを判定する。
Next, in a fourth step 24, the CPU 20 determines whether the above-mentioned flame arrival time Δt is smaller than the relationship f(Pb, Ig) between the load pb and the advance angle ■q shown in FIG. △t
Determine whether <f (Pb, IQ).

ここで、正常時には第7図に実線で示す如く火炎到達時
間T=f (Pb、Ig)となるが、点火1期が早過ぎ
る場合には同図に点線で示ず如くΔt<f (Pb、I
Q)となる。
Here, under normal conditions, the flame arrival time T=f (Pb, Ig) as shown by the solid line in FIG. 7, but if the first ignition stage is too early, Δt<f (Pb , I
Q).

このため火炎到達時間△tがf (Pb、Ig)より小
の場合には、次の第5ステツプ25でノックが発生する
ので、さらに次の第6ステツプ26でCPU20は点火
時期制御装置16を駆動制御して点火時期をリタード(
retard、遅くすること)させ、ノッキングの発生
を防止するようにコントロールした後、次のナイクルへ
移行する。
Therefore, if the flame arrival time Δt is smaller than f (Pb, Ig), a knock occurs in the next fifth step 25, and the CPU 20 then controls the ignition timing control device 16 in the next sixth step 26. Drive control to retard ignition timing (
After the engine is controlled to prevent knocking, the engine moves to the next cycle.

このように上述のイオンギャップセンサ7を例えばノッ
クセンサとして用いた場合には、点火時期を制御するこ
とで、ノッキングの発生を防止することができる。
In this way, when the above-described ion gap sensor 7 is used, for example, as a knock sensor, the occurrence of knocking can be prevented by controlling the ignition timing.

以上要するに、冷却水通路やオイル通路等の占有率の低
い合せ面、具体的にはガスケット2.3間に上述のイオ
ンギャップセンサ7の電極8を配設しているので、この
イオンギャップセンサ7の電極8の配設位置に制約を受
けることがなく、該電極8を例えばエンドガスゾーンお
よびボア全周などの要求部位に適切に配置することがで
き、この結果、斯る要求部位の燃焼状態を高精度に検出
することができる効果がある。
In short, since the electrode 8 of the above-mentioned ion gap sensor 7 is disposed between the mating surfaces with a low occupation rate such as cooling water passages and oil passages, specifically between the gaskets 2 and 3, this ion gap sensor 7 There are no restrictions on the location of the electrode 8, and the electrode 8 can be appropriately placed at required locations such as the end gas zone and the entire circumference of the bore. This has the effect of being able to detect with high precision.

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

図面はこの発明の一実施例を示し、 第1図はエンジンの燃焼状態検知装置を示す断面図、 第2図は第1図の1[−n線矢視断面図、第3図は第2
図の■−■線に沿う要部拡大断面図、第4図はグロメッ
トに形成する開口の他の実筋例を示す断面図、 ′PX5図はイオンギャップセンサをノックセンサとし
て用いる例を示す制御回路ブロック図、第6図は点火時
期制御を示す70−ブヤート、第7図は進角に対する火
炎到達時間の関係を示す特性図である。 1・・・シリンダブロック 4・・・シリンダヘッド6
・・・燃焼室 7・・・イオンギャップセンサ ト・ン′ル・り′70ツク 7・・イオンキ゛Vう7ゼン“ワ゛ 第1図 6・・・脚蛙i 第2ス 第3図 1・・・シリンダ”70ツク 4・・・シリングヘット。
The drawings show one embodiment of the present invention, FIG. 1 is a sectional view showing a combustion state detection device for an engine, FIG. 2 is a sectional view taken along the line 1[-n in FIG. 1, and FIG.
Figure 4 is an enlarged cross-sectional view of the main part along the line ■-■ in the figure, Figure 4 is a cross-sectional view showing another example of a real reinforcement of the opening formed in the grommet, and Figure 'PX5 is a control diagram showing an example of using an ion gap sensor as a knock sensor. 6 is a circuit block diagram showing ignition timing control, and FIG. 7 is a characteristic diagram showing the relationship between flame arrival time and advance angle. 1... Cylinder block 4... Cylinder head 6
... Combustion chamber 7 ... Ion gap sensor valve 70 Tsukku 7 ... Ion key valve 7 sensor (Fig. 1) 6 ... Legged frog i 2nd stage Fig. 3 1. ...Cylinder"70tsuku4...Shilling head.

Claims (1)

【特許請求の範囲】[Claims] 1.燃焼室に臨設され、直接エンジンの燃焼状態を検知
すると共に、燃焼状態に対応した出力を発生するイオン
ギャップセンサを備えたエンジンの燃焼状態検知装置で
あって、上記イオンギャップセンサの少なくとも一方を
シリンダヘッドとシリンダブロックとの合せ面に絶縁配
設したエンジンの燃焼状態検知装置。
1. An engine combustion state detection device equipped with an ion gap sensor installed in a combustion chamber to directly detect the combustion state of the engine and generate an output corresponding to the combustion state, wherein at least one of the ion gap sensors is connected to a cylinder. An engine combustion state detection device installed insulated on the mating surface of the head and cylinder block.
JP21196286A 1986-09-08 1986-09-08 Apparatus for detecting combustion state of engine Pending JPS6366431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21196286A JPS6366431A (en) 1986-09-08 1986-09-08 Apparatus for detecting combustion state of engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21196286A JPS6366431A (en) 1986-09-08 1986-09-08 Apparatus for detecting combustion state of engine

Publications (1)

Publication Number Publication Date
JPS6366431A true JPS6366431A (en) 1988-03-25

Family

ID=16614585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21196286A Pending JPS6366431A (en) 1986-09-08 1986-09-08 Apparatus for detecting combustion state of engine

Country Status (1)

Country Link
JP (1) JPS6366431A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004308761A (en) * 2003-04-07 2004-11-04 Uchiyama Mfg Corp Multifunction gasket
WO2006104144A1 (en) * 2005-03-28 2006-10-05 National University Corporation Okayama University Ion sensor, internal combustion engine control system using that ion sensor and control method of internal combustion engine
DE102004045143B4 (en) * 2003-09-19 2008-08-07 Uchiyama Manufacturing Corp. Multifunctional seal

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61175252A (en) * 1985-01-30 1986-08-06 Mazda Motor Corp Combustion controller for engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61175252A (en) * 1985-01-30 1986-08-06 Mazda Motor Corp Combustion controller for engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004308761A (en) * 2003-04-07 2004-11-04 Uchiyama Mfg Corp Multifunction gasket
DE102004045143B4 (en) * 2003-09-19 2008-08-07 Uchiyama Manufacturing Corp. Multifunctional seal
WO2006104144A1 (en) * 2005-03-28 2006-10-05 National University Corporation Okayama University Ion sensor, internal combustion engine control system using that ion sensor and control method of internal combustion engine
JP4834843B2 (en) * 2005-03-28 2011-12-14 国立大学法人 岡山大学 Ion sensor, internal combustion engine control system using this ion sensor, and control method for internal combustion engine

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