JPS5862362A - Suction device for internal-combustion engine - Google Patents
Suction device for internal-combustion engineInfo
- Publication number
- JPS5862362A JPS5862362A JP56161246A JP16124681A JPS5862362A JP S5862362 A JPS5862362 A JP S5862362A JP 56161246 A JP56161246 A JP 56161246A JP 16124681 A JP16124681 A JP 16124681A JP S5862362 A JPS5862362 A JP S5862362A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- chamber
- blown
- wall
- fed
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
- F02B31/04—Modifying induction systems for imparting a rotation to the charge in the cylinder by means within the induction channel, e.g. deflectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はヘリカル型吸気ボートを備えた内燃機関の吸気
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake system for an internal combustion engine equipped with a helical intake boat.
一般に、ヘリーカル型吸気ボートを備えた内燃機関の吸
気装置は、低温時でエンジンが冷機状態の下では吸気ボ
ートの温度が低いために、燃料噴射弁から吸気ボート内
に噴射される燃料が微粒化されないでシリンダ内の燃焼
室に吸収され易い。また、エンジンに高負荷がかかって
燃料の供給量が多い場合に、吸気バルブの背面に向け燃
料噴射弁の燃料噴射部が指向されている―係で、吸気バ
ルブの背面に燃料が噴出されるが、その際燃料の気化熱
によりヘリカル型吸気ボート内の温度が低下して効率よ
く均一に微粒化された燃料を含む混合気をシリンダ内の
燃焼室に供給する妨げとなっていた。In general, in the intake system of an internal combustion engine equipped with a helical type intake boat, when the engine is cold and the temperature of the intake boat is low, the fuel injected from the fuel injection valve into the intake boat becomes atomized. It is easily absorbed into the combustion chamber in the cylinder without being absorbed. Also, when the engine is under high load and a large amount of fuel is supplied, the fuel injection part of the fuel injector is directed toward the back of the intake valve, and fuel is injected to the back of the intake valve. However, at this time, the temperature inside the helical intake boat decreased due to the heat of vaporization of the fuel, which hindered the efficient and uniform supply of an air-fuel mixture containing atomized fuel to the combustion chamber within the cylinder.
従って、シリンダ内の燃焼室の内壁に粒状または液状に
燃料が付着して成層化され、その分だけ点火プラグ付近
の燃料が希薄となって失火の原因となりたり、車を加速
する時の息つきの原因となったｂする。Therefore, fuel adheres to the inner wall of the combustion chamber in the cylinder in granular or liquid form and becomes stratified, which dilutes the fuel near the spark plug and causes misfires, or reduces the breath when accelerating the car. caused b.
この対策としては燃料を燃料噴射弁から余計にシリンダ
内の燃焼室に噴出させて失火等を防止する方法もあるが
、その場合には燃費効率を悪化させるばかりでなくより
一層の大粒または液状の燃料が燃焼室の内壁に付着し、
その付着した燃料が完全に燃焼されずにＨＣ，ＣＯを大
量に含んだ状態で排気ガスとして排出されることになる
という問題がある。As a countermeasure to this problem, there is a method to prevent misfires by injecting extra fuel from the fuel injection valve into the combustion chamber in the cylinder, but in that case, not only will fuel efficiency deteriorate, but also larger droplets or liquid particles will be generated. Fuel adheres to the inner wall of the combustion chamber,
There is a problem in that the adhering fuel is not completely combusted and is emitted as exhaust gas containing a large amount of HC and CO.
本発明は上述した問題を解消するためのもので、ヘリカ
ル型吸気ボートである渦巻室の終端部に突出部を設け、
前記ヘリカル型吸気ポートの渦巻室内の外周壁下部へ向
けて燃料噴射弁の中心軸を指向させて構成することによ
り、ヘリカル型吸気ボートの渦巻室内の外周壁に粒状あ
るいは液状に付着した燃料を前記突出部の終端部から飛
散させて微粒化し、かつ、その際燃料の気化熱により生
ずるヘリカル型吸気ポート内の温度低下を防ぎ、均一［
１％粒化した燃料をスムーズに燃焼室へ供給できるよう
にしたことを特徴とする。The present invention is intended to solve the above-mentioned problems, and includes a protrusion provided at the end of the volute chamber, which is a helical intake boat.
By configuring the central axis of the fuel injection valve to be directed toward the lower part of the outer circumferential wall in the volute chamber of the helical intake port, the fuel attached in granular or liquid form to the outer circumferential wall in the volute chamber of the helical intake port can be removed from the The particles are dispersed from the end of the protruding part and atomized, and at the same time, the temperature inside the helical intake port, which is caused by the heat of vaporization of the fuel, is prevented from decreasing, and the temperature is uniformly [
It is characterized by being able to smoothly supply 1% granulated fuel to the combustion chamber.
以下、本発明の一実施例を図面に基づいて説明する。Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図および第２図において、１はシリンダヘッドで、
シリンダヘッド１にはその出口側が渦巻室とされたヘリ
カル型吸気ボート３が形成さねでいる。ヘリカル型吸気
ボート３の入口側ＶＣ，ｉｄ’ 、入口通路部４が形成
されており、渦巻室２ど入口通路部４の境界あたりには
最小紋り部６ａが設けられている。その最小紋り部３ａ
け第３図および第４図に示すように点り、 Ｍ、 Ｎ、
０で囲まれる平面、即ち台形状の空洞で形成されてい
る。また、ヘリカル型吸気ボート３である渦巻室２の終
端部には、第２図に示すように先端縁Ｒが鋭角にて形成
された突出部５が突設されている。更に、第２図に示す
ように、前記ヘリカル型吸気ボート３の最小紋妙部３ａ
を通り渦巻室２内の外周壁下部２ａに向けて燃料噴射弁
９の中心軸Ｗを指向させ、燃料噴射弁９から噴出される
燃料を、その中心軸Ｗの延長線上にあるヘリカル型吸気
ボート３の最小紋り部３ａのり、 Ｍ、 Ｎ、 ０で画
成される平面内のＷｌを通り渦巻室２内の外周壁下部２
ａに向けて噴出するように設定されている。第１図中６
は、渦巻室２内のほぼ中心に上下方向に摺動可能に設け
られたバルブステムで、その下端には吸気バルブ７が一
体に取付けられている。そして、渦巻室２内において、
燃料及び空気はバルブステム７を中心とした渦流状とな
って流れるようになっている。In Figures 1 and 2, 1 is a cylinder head;
A helical intake boat 3 whose outlet side is a swirl chamber is formed in the cylinder head 1. An inlet side VC, id' of the helical intake boat 3 and an inlet passage portion 4 are formed, and a minimum ridge portion 6a is provided near the boundary between the swirl chamber 2 and the inlet passage portion 4. The smallest crest part 3a
As shown in Figures 3 and 4, the lights are on, M, N,
It is formed by a plane surrounded by 0, that is, a trapezoidal cavity. Further, at the terminal end of the spiral chamber 2, which is the helical intake boat 3, a protruding portion 5 having a tip edge R formed at an acute angle is provided in a protruding manner, as shown in FIG. Furthermore, as shown in FIG.
The central axis W of the fuel injection valve 9 is directed toward the lower part 2a of the outer circumferential wall inside the volute chamber 2, and the fuel injected from the fuel injection valve 9 is directed to a helical intake boat located on an extension of the central axis W. The smallest ridge part 3a of 3 passes through Wl in the plane defined by M, N, 0 and connects to the lower part 2 of the outer peripheral wall inside the spiral chamber 2.
It is set to eject toward a. 6 in Figure 1
1 is a valve stem which is provided substantially in the center of the swirl chamber 2 so as to be slidable in the vertical direction, and an intake valve 7 is integrally attached to the lower end of the valve stem. Then, inside the spiral chamber 2,
The fuel and air flow in a swirl around the valve stem 7.
なお、突出部５の終端部にの先端縁Ｒの曲率半径は２ｍ
１以下に形成することが、後述する燃料のはく離（飛散
）を効率よく行う上で望ましい。また、第５図および第
４図に示したｈは、ヘリカル型吸気ボート３の最小紋り
部３ａの底辺からの高さを示しており、この高さｈけ、
中心軸Ｗの延長線が渦巻室２内の外周壁下部２ａに当接
する点の、バルブステム７軸心方向の位置を示している
。The radius of curvature of the tip edge R at the end of the protrusion 5 is 2 m.
It is desirable to form the number of particles to be 1 or less in order to efficiently perform the peeling (scattering) of fuel, which will be described later. In addition, h shown in FIGS. 5 and 4 indicates the height from the bottom of the minimum ridge 3a of the helical intake boat 3, and this height h,
It shows the position of the point where the extension of the central axis W contacts the lower part 2a of the outer circumferential wall in the swirl chamber 2 in the axial direction of the valve stem 7.
上述した構成より、本発明は次のように作用する。まず
、低温時でエンジンが冷機状態にある場合に、燃焼室８
へ混合気を供給するにあたって入口通路部４とシリンダ
の燃焼室８との間に設けられているヘリカル型吸気ボー
ト６の最小紋り部３ａのＷｌに向は燃料噴射弁９から燃
料が噴射されることになる。その噴射された燃料は、入
口通路部４方向より吹き付けられる空気により混合気と
なって渦巻室２内の外周壁下部。With the above-described configuration, the present invention operates as follows. First, when the engine is in a cold state at low temperatures, the combustion chamber 8
In order to supply the air-fuel mixture to the cylinder, fuel is injected from the fuel injection valve 9 toward Wl of the smallest ridge 3a of the helical intake boat 6 provided between the inlet passage 4 and the combustion chamber 8 of the cylinder. That will happen. The injected fuel becomes a mixture by the air blown from the inlet passage 4 direction, and reaches the lower part of the outer circumferential wall in the swirl chamber 2.
２ａに沿って燃焼室８内に流入していくことになる。そ
の際、ヘリカル型吸気ポート３内の温度が低いので、燃
料の一部が第２図に示すようにヘリカル型吸気ボート３
の渦巻終端部３ｂ近傍、すなわち、渦巻室２内の外周壁
下部２ａに液状に付着することになる。そうして、渦巻
室２内の外周壁下部２ａに付着した燃料は、ヘリカル型
吸気ポート３内に吹き込まれる混合気の風圧で、ヘリカ
ル型吸気ポート３内の突出部５の先端縁Ｒ側に吹き寄せ
られ、その吹き寄せられた燃料に向は更に空気流が吹き
付けられると、突出部５の先端縁Ｒが鋭角に形成されて
いるので、液状化した燃料が突出部５の先端縁Ｒよりは
く離現象を起こして飛散することにより微粒化されて、
吸気バルブ７の側端局部を通り均一に微粒化された燃料
を含んだ混合気が燃焼室８内に供給されることになる。It flows into the combustion chamber 8 along 2a. At that time, since the temperature inside the helical intake port 3 is low, a portion of the fuel is absorbed into the helical intake port 3 as shown in FIG.
The liquid adheres to the vicinity of the spiral terminal end 3b, that is, to the lower part 2a of the outer circumferential wall inside the spiral chamber 2. Then, the fuel adhering to the lower part 2a of the outer circumferential wall in the swirl chamber 2 is moved to the tip edge R side of the protrusion 5 in the helical intake port 3 due to the wind pressure of the air-fuel mixture blown into the helical intake port 3. When the blown fuel is further blown in the direction of the air flow, the liquefied fuel peels off from the tip edge R of the protrusion 5 because the tip edge R of the protrusion 5 is formed at an acute angle. It is atomized by causing and scattering,
The air-fuel mixture containing uniformly atomized fuel is supplied into the combustion chamber 8 through the local side end of the intake valve 7 .
次に、エンジンに高負荷がかかった場合には、大量の燃
料を燃焼＾に供給することになるが、その際にも前述し
たのと同様な作用により均一に微粒化された燃料を含む
混合気を供給することになる。その際、ヘリカル型吸気
ボート３の最小紋り部３ａのり、 Ｍ、 Ｎ、 Ｏで画
成される平面内のＷｌを通り渦巻室２内の外周壁下部２
ａに向は燃料噴射弁９の中心軸Ｗを指向させたので、燃
料の気化熱により生ずるヘリカル型吸気ボートｓ内の温
度低下を防止し７、しかも、混合気が渦巻室２内の外周
壁下部２ａに沿って流れるので、燃料がヘリカル型吸気
ボート３から燃料室８へ至る区間、十なわち、蒸発期間
を充分にとｉすることになり〕一層燃料の微粒化が促進
されて吸気バルブ７の側端周部より燃焼室８内へ均一に
微粒化された大量の燃料を含んだ混合気が効率良く供給
されることになる。Next, when a high load is applied to the engine, a large amount of fuel will be supplied for combustion, and in this case, a mixture containing uniformly atomized fuel will be produced by the same action as described above. It will supply energy. At that time, the smallest ridge 3a of the helical intake boat 3 passes through Wl in the plane defined by M, N, and O, and reaches the lower part 2 of the outer circumferential wall in the swirl chamber 2.
Since the central axis W of the fuel injection valve 9 is oriented in the direction a, a temperature drop inside the helical intake boat s caused by the heat of vaporization of the fuel is prevented 7, and the air-fuel mixture is prevented from flowing against the outer circumferential wall inside the swirl chamber 2. Since the fuel flows along the lower part 2a, the section from the helical intake boat 3 to the fuel chamber 8, that is, the evaporation period, is sufficiently long, and the atomization of the fuel is further promoted. The air-fuel mixture containing a large amount of uniformly atomized fuel is efficiently supplied into the combustion chamber 8 from the periphery of the side end of the combustion chamber 7 .
本発明は上述してきたことから明らかな如く、−、リカ
ル型吸気ボートである渦巻室の終端部に突出部を設け、
前記ヘリカル型吸気ポートの渦巻室内の外周壁下部に向
けて灯料噴射弁の中心４ｑｌＩを指向させて構成するこ
とにより、ヘリカル型吸気ポートの渦巻室内の外周壁下
部に粒状あるいけ液状に付着した燃料を前記突出部の終
端部から飛散させて微粒化し、かつ、その際燃料の気化
熱によるヘリカル型吸気ボート内の温度低下を防いで、
均一に微粒化した燃料をスムーズに燃焼室へ供給１７、
不完全燃焼を防止するとともに燃費を向上させる等の効
果を奏する。As is clear from the foregoing, the present invention has the following features: - Providing a protrusion at the end of the volute chamber, which is a recal-type intake boat;
By configuring the center 4qlI of the lamp injection valve to be directed toward the lower part of the outer circumferential wall in the volute chamber of the helical-type intake port, it is possible to prevent particles or liquid from adhering to the lower part of the outer circumferential wall in the volute chamber of the helical-type intake port. Atomizing the fuel by scattering it from the terminal end of the protrusion, and at the same time, preventing a temperature drop in the helical intake boat due to the heat of vaporization of the fuel,
Smoothly supplying uniformly atomized fuel to the combustion chamber 17,
This has effects such as preventing incomplete combustion and improving fuel efficiency.
第１図は本発明の一実施例を示す縦断面図、第２図は第
１図の１−■線に沿う断面図、第５図は本発明のヘリカ
ル型吸気ポートの概略斜視図、第４図は第１図の■−Ｉ
Ｖ線に沿う断面図である１、
２・・・渦巻室 ２ａ・・・外周壁３・・・ヘリ
カル型吸気ポートFIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line 1-■ in FIG. 1, and FIG. Figure 4 shows ■-I in Figure 1.
1, which is a cross-sectional view along the V line 2... Volute chamber 2a... Outer peripheral wall 3... Helical intake port
Claims (1)
置において、ヘリカル型吸気ポートの渦巻室の終端部に
突出部を設け、前記ヘリカル型吸気ポートの渦巻室の外
周壁下部に向けて燃料噴射弁の中心軸を指向させたこと
を特徴とする内燃機関の吸気装置。(1) In an intake system for an internal combustion engine equipped with a helical intake port, a protrusion is provided at the terminal end of the spiral chamber of the helical intake port, and fuel is injected toward the lower part of the outer peripheral wall of the spiral chamber of the helical intake port. An intake device for an internal combustion engine, characterized in that the central axis of the valve is oriented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56161246A JPS5862362A (en) | 1981-10-09 | 1981-10-09 | Suction device for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56161246A JPS5862362A (en) | 1981-10-09 | 1981-10-09 | Suction device for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5862362A true JPS5862362A (en) | 1983-04-13 |
Family
ID=15731424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56161246A Pending JPS5862362A (en) | 1981-10-09 | 1981-10-09 | Suction device for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5862362A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539954A (en) * | 1984-10-29 | 1985-09-10 | General Motors Corporation | Selective asymmetric swirl intake port |
-
1981
- 1981-10-09 JP JP56161246A patent/JPS5862362A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539954A (en) * | 1984-10-29 | 1985-09-10 | General Motors Corporation | Selective asymmetric swirl intake port |
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