JPH0311508B2 - - Google Patents
Info
- Publication number
- JPH0311508B2 JPH0311508B2 JP60212989A JP21298985A JPH0311508B2 JP H0311508 B2 JPH0311508 B2 JP H0311508B2 JP 60212989 A JP60212989 A JP 60212989A JP 21298985 A JP21298985 A JP 21298985A JP H0311508 B2 JPH0311508 B2 JP H0311508B2
- Authority
- JP
- Japan
- Prior art keywords
- mixed gas
- cylinder
- combustion
- flame
- fuel
- 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.)
- Expired - Lifetime
Links
- 239000007789 gas Substances 0.000 claims description 83
- 238000002485 combustion reaction Methods 0.000 claims description 46
- 239000000446 fuel Substances 0.000 claims description 38
- 239000000567 combustion gas Substances 0.000 claims description 11
- 238000009841 combustion method Methods 0.000 claims description 7
- 238000007906 compression Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P9/00—Electric spark ignition control, not otherwise provided for
- F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Spark Plugs (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は点火栓のスパークにより点火してシリ
ンダ内の混合ガスを燃焼させる内燃機関の混合ガ
ス燃焼方法に関する。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a mixed gas combustion method for an internal combustion engine in which mixed gas in a cylinder is ignited by a spark from an ignition plug to burn the mixed gas.
「従来の技術」
従来の基本的な点火方法は第１図に示す如く機
関のシリンダ上部に設けた点火栓の中心電極１の
一端と、金属製固定部３に溶着され、かつＬ字状
に折曲げた端面長方形の四角棒状の接地電極２の
一端とを対向するようにして、これら各一端間に
適当なプラグギヤツプＬ１（通常0.7mm）を設け、
機関の運転に際して適時中心電極１に陶磁製絶縁
体４を介して設けるターミナル５から通電するこ
とによりプラグギヤツプＬ１にスパークを発生せ
しめ、シリンダ内の混合ガスに点火爆発させてい
た。``Prior Art'' As shown in Fig. 1, the basic ignition method in the past is to weld an ignition plug to one end of the center electrode 1 of the ignition plug provided at the top of the cylinder of the engine and a metal fixing part 3, and to form an L-shape. A suitable plug gap L1 (usually 0.7 mm) is provided between each end of the ground electrode 2, which is a rectangular bar-shaped ground electrode 2 with a rectangular bent end face, facing each other.
When the engine is operated, a spark is generated in the plug gap L1 by energizing the center electrode 1 from a terminal 5 provided through a ceramic insulator 4 at appropriate times, causing the mixed gas in the cylinder to ignite and explode.
「発明が解決しようとする問題点」
このような点火方法において、従来は第２図及
び第３図に示す如く、Ｌ字状に折曲げた長方形の
接地電極１２はそれぞれ溶着された固定部１３か
ら中心電極１１に対向する先端までを連続した平
板で形成し、各電極１１，１２間のスパークによ
りスパーク発生位置１Ａの混合ガスを燃焼させ、
ピストン側１Ｂに延焼させていた。``Problems to be Solved by the Invention'' In such an ignition method, conventionally, as shown in FIGS. 2 and 3, the rectangular ground electrode 12 bent into an L-shape is attached to a welded fixed portion 13. A continuous flat plate is formed from to the tip facing the center electrode 11, and the mixed gas at the spark generation position 1A is combusted by the spark between each electrode 11 and 12.
The fire had spread to the piston side 1B.
前記従来技術では、点火直後の初期燃焼を除い
てシリンダ内混合ガスは乱流燃焼となり、火炎が
ある程度まで発達した後は延焼ガスの乱流に比例
して燃焼速度が加速されるが、点火直後の初期の
燃焼段階において、火炎の発達がある程度大きく
成長するまでの初期の燃焼速度が遅く、そのため
点火時期から燃焼終期に至る全体の燃焼時間の短
縮を容易に図り得ないもので、このことにより燃
焼速度を早めて機関効率を高め、燃費を向上させ
ることが難しい等の問題であつた。 In the above conventional technology, the mixed gas in the cylinder becomes turbulent combustion except for the initial combustion immediately after ignition, and after the flame has developed to a certain extent, the combustion speed is accelerated in proportion to the turbulence of the flame spread gas. In the initial combustion stage, the initial combustion speed is slow until the flame develops to a certain extent, and therefore it is not easy to shorten the overall combustion time from the ignition timing to the final combustion stage. Problems include the difficulty of increasing engine efficiency and fuel efficiency by increasing combustion speed.
また、米国特許第1537586号明細書に示す如く、
炭化物の附着などの防止を目的とし、接地電極の
スパーク発生側面を山形に突出させて傾斜面を形
成すべく、断面形状がＶ字形の屋根状に接地電極
を形成した技術があつたが、接地電極のピストン
側の面にＶ字形の溝が形成されるも、シリンダ内
部混合ガスの一部として、そのＶ字形の溝内部で
混合ガスが燃焼するだけであると共に、実開昭53
−87331号公報に示す如く、接地電極の周囲から、
またガス孔を通じて、接地電極のシリンダ側の混
合ガスを燃焼させる技術もあつたが、接地電極の
スパーク発生側におけるガス孔の開口縁を窪ませ
ているから、窪ませたスパーク発生側の面でプラ
グギヤツプの火炎核が反撥してガス孔と異なる方
向（中心電極方向）に伝播を促進するだけであ
り、プラグギヤツプの火炎がある程度大きく成長
するまでの初期の燃焼速度を早める作用が得られ
るものではないから、点火時期から燃焼終期に至
る全体の燃焼時間の短縮を容易に図り得ないもの
であつた。 Also, as shown in US Patent No. 1537586,
For the purpose of preventing carbide adhesion, there was a technique in which the ground electrode was formed into a roof-like V-shaped cross-sectional shape in order to make the spark-generating side of the ground electrode protrude in a chevron shape to form an inclined surface. Although a V-shaped groove is formed on the surface of the electrode on the piston side, the mixed gas is only burned inside the V-shaped groove as part of the mixed gas inside the cylinder.
As shown in Publication No.-87331, from around the ground electrode,
There is also a technique to burn the mixed gas on the cylinder side of the ground electrode through the gas hole, but since the opening edge of the gas hole on the spark generation side of the ground electrode is recessed, the recessed surface on the spark generation side The flame kernel in the plug gap is repelled and only promotes propagation in a direction different from the gas hole (towards the center electrode), and does not have the effect of accelerating the initial combustion speed until the flame in the plug gap grows to a certain degree. Therefore, it has not been possible to easily shorten the overall combustion time from the ignition timing to the final stage of combustion.
「問題点を解決するための手段」
然るに、本発明は、中心電極先端に接地電極を
対設させ、これらの間にスパークを発生させてシ
リンダ内混合ガスに点火する燃焼方法において、
プラグギヤツプとシリダの間にシリダよりも小容
積に形成していてプラグギヤツプに対し可及的に
短距離で連通させる形状であつて供給する混合ガ
スによつて残存する燃焼ガスが排出される形状の
燃焼集中部を設け、スパークの発生によりプラグ
ギヤツプに形成される火炎核を第１の種火とし、
前記燃料集中部の混合ガスを、前記第１の種火に
より、前記燃料集中部に比べて大容積のシリンダ
内の混合ガスよりも早期に燃焼させ、前記燃料集
中部にプラグギヤツプの火炎核よりも大きな火力
の第２の種火を形成し、該第２の種火によりシリ
ンダ内の混合ガスを速燃焼させることを特徴とす
るものである。"Means for Solving the Problems" However, the present invention provides a combustion method in which a ground electrode is disposed opposite to the tip of a center electrode, and a spark is generated between these to ignite a mixed gas in a cylinder.
A combustion method in which a volume smaller than that of the cylinder is formed between the plug gap and the cylinder, communicating with the plug gap over as short a distance as possible, and remaining combustion gas is exhausted by the supplied mixed gas. A concentrated part is provided, and the flame nucleus formed in the plug gap by the generation of spark is used as the first pilot flame,
The mixed gas in the fuel concentrated section is combusted by the first pilot flame earlier than the mixed gas in the cylinder, which has a larger volume compared to the fuel concentrated section, and the fuel concentrated section is burned earlier than the flame kernel in the plug gap. It is characterized in that a second pilot flame with a large thermal power is formed, and the mixed gas in the cylinder is rapidly combusted by the second pilot flame.
「作用」
従つて、スパーク発生から火炎が乱流により加
速膨張するまでの初期の燃焼時期において、シリ
ンダ内混合ガスに比して少量であるから速く燃焼
する燃料集中部の混合ガスを、火力の大きな第２
の種火として用いるから、シリンダ内における混
合ガスの初期燃焼の時間短縮を容易に図ることが
でき、ピストンの圧縮工程中における混合ガスの
燃焼時間を短縮し、圧縮工程におけるエネルギー
損失を減少させて内燃機関の効率を向上させ、燃
料費量を減少し得るに至つたものであり、前記各
電極間のスパークに比べて火力が強い燃料集中部
の燃焼ガスの膨出によい点火直後の初期の延焼速
度を著しく加速し得、従来に比べてシリンダ内混
合ガスの初期の燃焼時間を容易に短縮し得、シリ
ンダ内混合ガスを従来よりも速い延焼速度で燃焼
させて高い燃焼効率と極めて優れた燃費を得られ
るものである。``Effect'' Therefore, during the initial combustion period from the generation of sparks until the flame accelerates and expands due to turbulence, the mixed gas in the fuel concentrated part, which burns faster because it is smaller in amount than the mixed gas in the cylinder, is reduced by thermal power. big second
Since it is used as a pilot flame, it is possible to easily shorten the initial combustion time of the mixed gas in the cylinder, shorten the combustion time of the mixed gas during the compression process of the piston, and reduce energy loss during the compression process. This technology has improved the efficiency of internal combustion engines and reduced fuel costs, and is effective in the initial stage immediately after ignition, which is good for the expansion of combustion gas in the fuel concentration area, which has a stronger thermal power than the spark between the electrodes. The flame spread speed can be significantly accelerated, the initial combustion time of the mixed gas in the cylinder can be easily shortened compared to the conventional method, and the mixed gas in the cylinder can be combusted at a faster flame spread speed than the conventional method, resulting in high combustion efficiency and extremely excellent combustion efficiency. This means that you can get better fuel efficiency.
「実施例」
以下本発明の実施例を図面に基づき詳細に説明
する。第４図乃至第７図は本発明の一実施例を示
すものであり、Ｌ字状に折曲げた接地電極３２は
その一端を中心電極３１の一端に対向させ、これ
ら各一端間に適当なプラグギヤツプを形成する一
方、接地電極３２の他端を固定部３３に溶着固定
している。"Embodiments" Examples of the present invention will be described in detail below with reference to the drawings. 4 to 7 show an embodiment of the present invention, in which a ground electrode 32 bent into an L-shape has one end facing one end of the center electrode 31, and a suitable distance between each end. While forming a plug gap, the other end of the ground electrode 32 is welded and fixed to a fixing part 33.
この接地電極３２にはプラグギヤツプ近傍であ
るスパーク発生位置３Ａとピストン側３Ｂとを貫
通する複数のガス孔３６…を開設しており、また
接地電極３２はＬ字状の先端側において長手方向
両側をピストン側３Ｂへ夫々折曲部３７，３７を
形成し、前記複製のガス孔３６…のピストン側３
Ｂ開口部側に、ガス孔３６…に連通してピストン
側３Ｂへ開放する燃料集中部３９を設ける一方、
前記接地電極３２の両側折曲部３７，３７のスパ
ーク発生位置３Ａ側とピストン側３Ｂとに、下
（ピストン側）へ傾斜するテーパ面３８，３８を
夫々形成しているもので、前記中心電極３１の軸
方向に対して直交させる接地電極３２の幅をこの
厚みより大きく形成し、前記中心電極３１の軸方
向に貫通させるガス孔３６を中心電極３１に対設
させる接地電３２面の短手方向略中央に設けると
共に、前記中心電極３１に対設する接地電極３２
の長手方向両側縁をピストン側３Ｂに折曲げて折
曲部３７，３７を形成し、前記中心電極３１に対
向する接地電極３２面を台形凸状に、またそれと
反対側の接地電極３２面を台形凹状に、接地電極
３２長手方向に連続して夫々形成し、前記接地電
極３２の台形凹状面で囲むピストン側３Ｂの燃料
集中部３９を前記ガス孔３６によりスパーク発生
側３Ａに連通させる一方、前記接地電極３２の台
形凸状面の平坦部幅よりもガス孔３６の内径を小
さく形成したものである。 This ground electrode 32 has a plurality of gas holes 36 that pass through the spark generation position 3A near the plug gap and the piston side 3B, and the ground electrode 32 has both longitudinal sides on the L-shaped tip side. Bent portions 37, 37 are formed on the piston side 3B, respectively, and the piston side 3 of the duplicate gas holes 36...
A fuel concentration part 39 is provided on the B opening side, which communicates with the gas holes 36 and opens to the piston side 3B.
Tapered surfaces 38, 38 which are inclined downward (toward the piston) are formed on the spark generation position 3A side and the piston side 3B of both side bent portions 37, 37 of the ground electrode 32, respectively, and the center electrode The width of the ground electrode 32 that is perpendicular to the axial direction of the center electrode 31 is formed to be larger than this thickness, and the gas hole 36 that penetrates the center electrode 31 in the axial direction is provided opposite to the center electrode 31 on the short side of the ground electrode 32 surface. A ground electrode 32 provided approximately at the center in the direction and opposite to the center electrode 31;
Both edges in the longitudinal direction are bent toward the piston side 3B to form bent portions 37, 37, and the surface of the ground electrode 32 facing the center electrode 31 is formed into a trapezoidal convex shape, and the surface of the ground electrode 32 on the opposite side is formed into a trapezoidal convex shape. The ground electrodes 32 are formed continuously in the longitudinal direction in a trapezoidal concave shape, and the fuel concentration part 39 on the piston side 3B surrounded by the trapezoidal concave surface of the ground electrode 32 is communicated with the spark generation side 3A through the gas hole 36, The inner diameter of the gas hole 36 is formed to be smaller than the width of the flat part of the trapezoidal convex surface of the ground electrode 32.
本実施例は上記の如く構成するもので、前記中
心電極３１と接地電極３２間のプラグギヤツプに
スパークを発生させることにより、そのプラグギ
ヤツプの混合ガスが燃焼し、接地電極３２のスパ
ーク発生側３Ａにおける燃焼ガスが台形凸状面で
ある折曲部３７のテーパ面３８に反発して乱流拡
散し、スパーク発生側３Ａにおける点火初期の燃
焼速度を加速すると共に、火力の小さな第１の種
火であるスパーク発生と殆んど同時に、ガス孔３
６を経て燃料集中部３９内の混合ガスを燃焼させ
る。 The present embodiment is constructed as described above, and by generating a spark in the plug gap between the center electrode 31 and the ground electrode 32, the mixed gas in the plug gap is combusted, and the spark generation side 3A of the ground electrode 32 is combusted. The gas is repelled by the tapered surface 38 of the bent portion 37, which is a trapezoidal convex surface, and diffuses in a turbulent flow, accelerating the combustion speed at the initial stage of ignition on the spark generation side 3A, and serves as a first pilot flame with low thermal power. Almost at the same time as spark generation, gas hole 3
6, the mixed gas in the fuel concentration section 39 is combusted.
前記集中部３９における混合ガスはシリンダ内
混合ガスに比して小容量であるから極めて短時間
に燃焼し、その燃焼の開始と共に、発生する膨張
した高圧の延焼ガスは、前記燃料集中部３９を形
成する接地電極３２の台形凹状の折曲部３７の底
面及びテーパー面３８に制限されて、これに反撥
し、高圧力は速さとなつて、ピストン側３Ｂとシ
リンダ内側面の方向に燃焼しつゝ強力な火力を有
する第２の種火となつて膨出延焼し、点火初期に
おける火炎伝搬速度を加速して混合ガスの初期燃
焼を早期に完了し、点火初期から燃焼終期に至る
全体の燃焼時間を短縮することができたものであ
る。 Since the mixed gas in the concentrated portion 39 has a small volume compared to the mixed gas in the cylinder, it is combusted in an extremely short time, and as soon as the combustion starts, the expanded high-pressure spread gas that is generated burns the fuel concentrated portion 39. Restricted by the bottom surface and tapered surface 38 of the trapezoidal concave bent portion 37 of the ground electrode 32 to be formed, the high pressure is repulsed, and the high pressure increases speed and burns in the direction of the piston side 3B and the inner surface of the cylinder. It acts as a second pilot flame with strong firepower, expands and spreads, accelerates the flame propagation speed at the initial stage of ignition, completes the initial combustion of the mixed gas early, and achieves overall combustion from the early stage of ignition to the final stage of combustion. It was possible to shorten the time.
上記のように、中心電極３１と接地電極３２の
間にスパークが発生して混合ガスに点火されたと
き、接地電極３２に設けた燃料集中部３９の混合
ガスにもスパーク発生と殆んど同時にガス孔３６
より点火されて燃焼が始まるもので、これをスロ
ーモーシヨンで述べるならば、燃焼開始の時点に
おいて、殆んど同時に混合ガスの延焼により燃料
集中部３９に膨張ガスが生じ、その膨張圧力は燃
料集中部３９の底面及び両側斜面に制限されて燃
焼ガスの膨出速度を加速することになり、開口さ
れたピストン側３Ｂ方向と接地電極３２の長手方
向の両側開口部方向に、燃料集中部３９の未燃焼
混合ガスと共にこれを燃焼し乍ら膨出して延焼す
る。 As described above, when a spark is generated between the center electrode 31 and the ground electrode 32 and the mixed gas is ignited, the mixed gas in the fuel concentration section 39 provided on the ground electrode 32 is also ignited almost simultaneously with the spark generation. Gas hole 36
To describe this in slow motion, at the start of combustion, expanding gas is generated in the fuel concentration part 39 due to the spread of the mixed gas, and the expansion pressure is equal to the fuel concentration. The expansion speed of combustion gas is accelerated by being restricted by the bottom surface and slopes on both sides of the portion 39, and the fuel concentrating portion 39 is While burning this together with the unburned mixed gas, it expands and spreads the fire.
即ち、スパーク発生が第１の種火とするなら
ば、この種火によつて点火された燃料集中部３９
の混合ガスはシリンダ内混合ガスに比して少量で
あるから燃焼も速くて燃焼ガスの膨張力で加速さ
れて膨出した強力な火力を有する第２の種火とな
つて延焼し、極めて素早くシリンダ内混合ガスを
速燃焼することができるもので、例えばライタの
火打石のスパークでは火力が弱いが、ライタのガ
スに火を移すことで火力を増すことができ、これ
と似て燃料集中部３９の機能も、火力に火炎伝搬
の加速力を加えるものであつて、これにより燃焼
室内の混合ガスを速燃焼するので、パワーアツプ
となつて効率を向上して省燃費を得ることができ
る。 That is, if the spark is generated by the first pilot flame, the fuel concentrated portion 39 ignited by this pilot flame
Because the mixed gas is small compared to the mixed gas in the cylinder, it burns quickly and is accelerated by the expansion force of the combustion gas, becoming a second pilot flame with strong firepower that spreads the fire extremely quickly. It is capable of quickly burning the mixed gas in the cylinder.For example, the spark from the flint of a lighter has weak firepower, but the firepower can be increased by transferring the fire to the lighter gas.Similar to this, the fuel concentration part 39 This function also adds an acceleration force for flame propagation to the thermal power, which causes the mixed gas in the combustion chamber to burn quickly, increasing power, improving efficiency, and saving fuel.
前記から明らかなように、中心電極３１先端に
接地電極３２を対設させ、これらの間にスパーク
を発生させてシリンダ内混合ガスに点火する燃焼
方法において、プラグギヤツプとシリンダの間に
シリンダよりも小容積に形成していてプラグギヤ
ツプに対し可及的に短距離で連通させる形状であ
つて供給する混合ガスによつて残存する燃焼ガス
が排出される形状の燃焼集中部３９を設け、スパ
ークの発生によりプラグギヤツプに形成される火
炎核を第１の種火とし、前記燃料集中部３９の混
合ガスを、前記第１の種火により、前記燃料集中
部３９に比べて大容積のシリンダ内の混合ガスよ
りも早期に燃焼させ、前記燃料集中部３９にプラ
グギヤツプの火炎核よりも大きな火力の第２の種
火を形成し、該第２の種火によりシリンダ内の混
合ガスを速燃焼させるものである。 As is clear from the above, in the combustion method in which the ground electrode 32 is disposed opposite to the tip of the center electrode 31 and a spark is generated between them to ignite the mixed gas in the cylinder, there is a space between the plug gap and the cylinder that is smaller than the cylinder. A combustion concentration part 39 is provided, which is formed in a volume and has a shape that communicates with the plug gap over a short distance as much as possible, and has a shape that allows residual combustion gas to be exhausted by the supplied mixed gas. The flame kernel formed in the plug gap is used as a first pilot flame, and the mixed gas in the fuel concentrating section 39 is controlled by the first pilot flame from the mixed gas in the cylinder whose volume is larger than that in the fuel concentrating section 39. A second pilot flame having a larger thermal power than the flame core of the plug gap is formed in the fuel concentrating portion 39, and the mixed gas in the cylinder is quickly combusted by the second pilot flame.
而してガソリン用往復内燃機関において、省燃
費効果を得るためにはシリンダ内混合ガスを速く
燃焼することが最良の手段の一つであり、その理
想は機関運転中、圧縮行程の終り、上死点の近く
において点火と同時に燃焼し燃焼ガスが最高圧と
なつて作用行程に移行することであるが、現時点
において如何に混合ガスの可燃性が優れていて
も、燃焼には若干の時間が必要であつて、それは
不可能であるから、現在のガソリン用内燃機関に
おいては、圧縮行程でピストンが上死点に到達す
る以前に点火時間を調整設定し、スパークが発生
して点火されてシリンダ内混合ガスの燃焼が始ま
り、圧縮行程でピストンが上死点に達した時に燃
焼ガスが最高圧になつて作用行程に移行するよう
に設定されているが、点火された時点から上死点
に至る間において混合ガスの燃焼によつて生じる
燃焼ガス膨張圧力に対抗してピストンが移動して
最高圧を得るから、その燃焼ガス圧力の抵抗に要
するエネルギーは内燃機関の出力損失となるもの
で、本発明の発想はこの出力損失を減少するため
に燃料集中部３９を設け、その機能によつて第２
の種火として延焼速度の加速力と、強力な火力を
有する延焼ガスを発生してシリンダ内混合ガスの
早期燃焼を可能にしたものであつて、このように
速燃作用を有する故に点火時期も従来の点火方法
に比して、それを遅らせる必要があり又可能であ
つて、また希薄混合ガスの使用も可能となり、こ
れらの機関の調整により、点火されてから上死点
の最高圧に至る間に燃焼し膨張するガス圧の抵抗
によるエネルギーの損失を減少させ、機関効率を
向上し省燃費を達成し得たものである。 In gasoline reciprocating internal combustion engines, one of the best ways to achieve fuel efficiency is to quickly burn the mixed gas in the cylinder, and ideally, during engine operation, at the end of the compression stroke, It burns at the same time as ignition near the dead center, and the combustion gas reaches the highest pressure and moves to the working stroke. However, no matter how good the flammability of the mixed gas is at present, it takes some time for combustion to occur. However, since this is impossible, in current gasoline internal combustion engines, the ignition time is adjusted and set before the piston reaches top dead center during the compression stroke, and a spark is generated and ignited to fire the cylinder. Combustion of the internal mixed gas begins, and when the piston reaches top dead center in the compression stroke, the combustion gas is set to reach the highest pressure and move to the working stroke. During this period, the piston moves against the combustion gas expansion pressure generated by the combustion of the mixed gas to obtain the highest pressure, so the energy required to resist the combustion gas pressure results in an output loss of the internal combustion engine. The idea of the present invention is to provide a fuel concentration section 39 in order to reduce this output loss, and by its function, a second fuel concentration section 39 is provided.
As a pilot flame, it generates flame spreading gas that accelerates the rate of fire spread and has strong firepower, enabling early combustion of the mixed gas in the cylinder.Because it has a fast combustion effect, the ignition timing is also Compared to conventional ignition methods, it is necessary and possible to delay the ignition, and it is also possible to use a lean mixture of gases, and by adjusting these engines, the maximum pressure at top dead center is reached after ignition. This reduces energy loss due to resistance to gas pressure during combustion and expansion, improves engine efficiency, and achieves fuel savings.
「発明の効果」
以上実施例から明らかなように本発明は、中心
電極３１先端に接地電極３２を対設させ、これら
の間にスパークを発生させてシリンダ内混合ガス
に点火する燃焼方法において、プラグギヤツプと
シリンダの間にシリンダよりも小容積に形成して
いてプラグギヤツプに対し可及的に短距離で連通
させる形状であつて供給する混合ガスによつて残
存する燃焼ガスが排出される形状の燃焼集中部３
９を設け、スパークの発生によりプラグギヤツプ
に形成される火炎核を第１の種火とし、前記燃料
集中部３９の混合ガスを、前記第１の種火によ
り、前記燃料集中部３９に比べて大容積のシリン
ダ内の混合ガスよりも早期に燃焼させ、前記燃料
集中部３９にプラグギヤツプの火炎核よりも大き
な火力の第２の種火を形成し、該第２の種火によ
りシリンダ内の混合ガスを速燃焼させるもので、
スパーク発生から火炎が乱流により加速膨張する
までの初期の燃焼時間において、シリンダ内混合
ガスに比して少量であるから速く燃焼する燃料集
中部３９の混合ガスを、火力の大きな第２の種火
として用いるから、シリンダ内における混合ガス
の初期燃焼の時間短縮を容易に図ることができ、
ピストンの圧縮工程中における混合ガスの燃焼時
間を短縮し、圧縮工程におけるエネルギー損失を
減少させて内燃機関の効率を向上させ、燃料消費
量を減少させることができたものであり、前記各
電極３１，３２間のスパークにより形成する第１
の種火に比べて火力が強い燃料集中部３９の第２
の種火の膨出により点火直後の初期の延焼速度を
著しく加速することができ、従来に比べてシリン
ダ内混合ガスの初期の燃焼時間を容易に短縮で
き、シリンダ内混合ガスを従来よりも速い延焼速
度で燃焼されることができて高い燃焼効率と極め
て優れた燃費を得ることができるものである。"Effects of the Invention" As is clear from the above embodiments, the present invention provides a combustion method in which a ground electrode 32 is disposed opposite to the tip of a center electrode 31, and a spark is generated between them to ignite a mixed gas in a cylinder. Combustion in which a volume smaller than that of the cylinder is formed between the plug gap and the cylinder, communicating with the plug gap over as short a distance as possible, and remaining combustion gas is exhausted by the supplied mixed gas. Concentration part 3
9 is provided, a flame kernel formed in the plug gap due to the generation of spark is used as a first pilot light, and the mixed gas in the fuel concentration section 39 is controlled by the first pilot light to be larger than that in the fuel concentration section 39. The mixed gas in the cylinder is combusted earlier than the mixed gas in the cylinder, and a second pilot flame with a larger firepower than the flame core of the plug gap is formed in the fuel concentration section 39, and the mixed gas in the cylinder is combusted by the second pilot flame. It burns quickly,
During the initial combustion time from the generation of sparks until the flame accelerates and expands due to turbulence, the mixed gas in the fuel concentrating section 39, which burns faster because it is a smaller amount than the mixed gas in the cylinder, is replaced by a second species with greater thermal power. Since it is used as a fire, it is possible to easily shorten the initial combustion time of the mixed gas in the cylinder.
It is possible to shorten the combustion time of the mixed gas during the piston compression process, reduce energy loss during the compression process, improve the efficiency of the internal combustion engine, and reduce fuel consumption. , 32 formed by the spark between
The second part of the fuel concentrating part 39 has a stronger firepower than the pilot fire of
The initial flame spread rate immediately after ignition can be significantly accelerated by the expansion of the pilot flame, and the initial combustion time of the mixed gas in the cylinder can be easily shortened compared to conventional methods. It can be combusted at a high rate of fire spread, resulting in high combustion efficiency and extremely excellent fuel efficiency.
以上の如く本発明は、点火の初期に燃焼して発
生する混合ガスの膨張力を制限し、これを延焼ガ
スの加速力として利用して、未燃焼のシリンダ内
混合ガスの方向に膨出させて、シリンダ内混合ガ
スを著しく速く燃焼する効果を有するものであ
る。 As described above, the present invention limits the expansion force of the mixed gas generated by combustion at the initial stage of ignition, and uses this as an accelerating force for the spread gas to expand in the direction of the unburned mixed gas in the cylinder. This has the effect of burning the mixed gas in the cylinder extremely quickly.
第１図は従来例を示す全体の断面図、第２図は
その要部の拡大断面図、第３図は第２図の底面視
図、第４図は本発明の一実施例を示す要部の拡大
断面図、第５図は第４図の底面視図、第６図は第
４図のＣ−Ｃ線視拡大図、第７図は第４図のＤ−
Ｄ線矢視断面図である。
３１……中心電極、３２……接地電極、３９…
…燃料集中部。
Fig. 1 is an overall cross-sectional view showing a conventional example, Fig. 2 is an enlarged cross-sectional view of the main part thereof, Fig. 3 is a bottom view of Fig. 2, and Fig. 4 is a schematic diagram showing an embodiment of the present invention. FIG. 5 is a bottom view of FIG. 4, FIG. 6 is an enlarged view taken along line C-C of FIG. 4, and FIG. 7 is an enlarged view taken along line D-
It is a sectional view taken along the line D. 31...center electrode, 32...ground electrode, 39...
...Fuel concentration section.
Claims (1)
せ、これらの間にスパークを発生させてシリンダ
内混合ガスに点火する燃焼方法において、プラグ
ギヤツプとシリンダの間にシリンダよりも小容積
に形成していてプラグギヤツプに対し可及的に短
距離で連通させる形状であつて供給する混合ガス
によつて残存する燃焼ガスが排出される形状の燃
料集中部３９を設け、スパークの発生によりプラ
グギヤツプに形成される火炎核を第１の種火と
し、前記燃料集中部３９の混合ガスを、前記第１
の種火により、前記燃料集中部３９に比べて大容
積のシリンダ内の混合ガスよりも早期に燃焼さ
せ、前記燃料集中部３９にプラグギヤツプの火炎
核よりも大きな火力の第２の種火を形成し、該第
２の種火によりシリンダ内の混合ガスを速燃焼さ
せることを特徴とする内燃機関の混合ガス燃焼方
法。1 In a combustion method in which a ground electrode 32 is disposed opposite to the tip of a center electrode 31 and a spark is generated between them to ignite the mixed gas in the cylinder, a space between the plug gap and the cylinder is formed to have a smaller volume than that of the cylinder. A fuel concentrating part 39 is provided, which is shaped to communicate with the plug gap over a short distance as possible, and has a shape that allows residual combustion gas to be discharged by the supplied mixed gas, thereby reducing the flame that is formed in the plug gap due to the generation of sparks. The core is used as a first pilot flame, and the mixed gas in the fuel concentration section 39 is
The pilot flame causes combustion to occur earlier than the mixed gas in the cylinder, which has a larger volume than the fuel concentrating part 39, and forms a second pilot flame in the fuel concentrating part 39 that has a larger firepower than the flame core of the plug gap. A mixed gas combustion method for an internal combustion engine, characterized in that the mixed gas in the cylinder is rapidly combusted by the second pilot flame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21298985A JPS61112726A (en) | 1985-09-25 | 1985-09-25 | Combustion method of air-fuel mixture in internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21298985A JPS61112726A (en) | 1985-09-25 | 1985-09-25 | Combustion method of air-fuel mixture in internal-combustion engine |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12110778A Division JPS5546481A (en) | 1977-12-28 | 1978-09-29 | Ignition plug |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4886789A Division JPH01290972A (en) | 1989-03-01 | 1989-03-01 | Mixture gas combusting method for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61112726A JPS61112726A (en) | 1986-05-30 |
| JPH0311508B2 true JPH0311508B2 (en) | 1991-02-18 |
Family
ID=16631619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21298985A Granted JPS61112726A (en) | 1985-09-25 | 1985-09-25 | Combustion method of air-fuel mixture in internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61112726A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04206488A (en) * | 1990-11-30 | 1992-07-28 | Ryohei Kashiwabara | Quick combustion device for ignition plug |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1537586A (en) * | 1922-10-28 | 1925-05-12 | Ac Spark Plug Co | Self-cleaning spark plug |
| JPS5148032A (en) * | 1974-10-17 | 1976-04-24 | Intai Tei | NAINENKIKANNOTENKASOCHI |
| JPS5344745A (en) * | 1976-10-02 | 1978-04-21 | Kazumi Miyawaki | Turbulence generating ignition plug |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5387331U (en) * | 1976-12-20 | 1978-07-18 |
-
1985
- 1985-09-25 JP JP21298985A patent/JPS61112726A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1537586A (en) * | 1922-10-28 | 1925-05-12 | Ac Spark Plug Co | Self-cleaning spark plug |
| JPS5148032A (en) * | 1974-10-17 | 1976-04-24 | Intai Tei | NAINENKIKANNOTENKASOCHI |
| JPS5344745A (en) * | 1976-10-02 | 1978-04-21 | Kazumi Miyawaki | Turbulence generating ignition plug |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61112726A (en) | 1986-05-30 |
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