JPS5926776B2 - Diesel engine intake system - Google Patents
Diesel engine intake systemInfo
- Publication number
- JPS5926776B2 JPS5926776B2 JP54016733A JP1673379A JPS5926776B2 JP S5926776 B2 JPS5926776 B2 JP S5926776B2 JP 54016733 A JP54016733 A JP 54016733A JP 1673379 A JP1673379 A JP 1673379A JP S5926776 B2 JPS5926776 B2 JP S5926776B2
- Authority
- JP
- Japan
- Prior art keywords
- flow
- intake
- swirl
- diesel engine
- main
- 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
Links
Classifications
-
- 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
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】
本発明はディーゼルエンジンの吸気流を干渉させ、もつ
て燃料と吸気との混合を向上させた吸気装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake system for a diesel engine that interferes with the intake air flow and thereby improves the mixing of fuel and intake air.
燃料を燃焼室内へ直接噴射する方式のディーゼルエンジ
ンでは、燃料と吸気との混合を向上させるために、吸気
ボートから吸入される吸気流にスワールを与えている。In diesel engines that inject fuel directly into the combustion chamber, a swirl is applied to the intake air flow taken in from the intake boat in order to improve the mixing of the fuel and intake air.
この方式の直接噴射式ディーゼルエンジンでは次のよう
な欠点があつた。すなわち、スワールによつて燃料の混
合を促進したとしても十分に均一な混合気を得ることが
できず、スモーク濃度の低下、燃料消費率の改善等燃焼
の全般に係わる改善は出来ない。排気中のＮｏｘ量を低
減するには、スワールを強くして、均一な混合気へ近づ
ければよいがというと、必らずしもそうではない。This type of direct injection diesel engine had the following drawbacks. That is, even if fuel mixing is promoted by swirl, a sufficiently uniform air-fuel mixture cannot be obtained, and overall improvements in combustion, such as a reduction in smoke concentration and an improvement in fuel consumption rate, cannot be achieved. In order to reduce the amount of NOx in the exhaust gas, it is sufficient to strengthen the swirl and bring the mixture closer to a homogeneous mixture, but this is not necessarily the case.
一般にはスワールを強くすると高速回転でオーバースワ
ールになり、高速での黒煙、燃費が悪化する。一方、ス
ワールが弱い場合には、一般には排気中のＮｏｘは低減
するがスモーク濃度は悪化する。そこで、比較的弱いス
ワールで燃料と空気の混合をよくすることが必要となる
。In general, when the swirl is strengthened, over-swirl occurs at high speeds, resulting in black smoke at high speeds and poor fuel efficiency. On the other hand, when the swirl is weak, NOx in the exhaust gas generally decreases, but the smoke concentration deteriorates. Therefore, it is necessary to improve the mixing of fuel and air with a relatively weak swirl.
燃料と空気の混合をよくするには、スワール中に多量の
小渦流を生じさせ、スワールを撹乱すると効果的である
ことが知られている。上記、多量の小渦流を含むスワー
ルを生じさせる公知技術として、シリンダ内へ吸入され
る吸気流をスワールに寄与する主流と、該主流に衝突す
る副流とに分けるものがある。In order to improve the mixing of fuel and air, it is known that it is effective to generate a large amount of small vortices in the swirl to disturb the swirl. As the above-mentioned known technology for generating a swirl containing a large amount of small eddies, there is a technique that divides the intake air flow taken into the cylinder into a main flow that contributes to the swirl and a side flow that collides with the main flow.
（例へば特公昭５１−２９２４１号公報、特公昭５２−
１２８４５号公報その他特開昭５０−３２３０９号公報
、特開昭５２−１０４６１２号公報、実公昭５］−１０
２４１号公報等）これらの公知技術は、単一の吸気ポー
トから吸入される吸気流を主流と副流の２流に分けてい
る。(For example, Tokuko No. 51-29241, Tokuko No. 52-
No. 12845, and other Japanese Patent Application Laid-open No. 1983-32309, Japanese Patent Application Laid-open No. 104612-1982, and Jikko No. 5]-10
No. 241, etc.) These known techniques divide the intake air flow taken in from a single intake port into two streams: a main stream and a side stream.
そのための構成として、吸気ポート付近の吸気通路にせ
り出し部を形成している。上記公知技術においても次の
ような欠点が生ずる。To this end, a protruding portion is formed in the intake passage near the intake port. The above-mentioned known technology also has the following drawbacks.
吸気ボートから吸入される主、副流だけではその衝突位
置を燃焼にとつて最適に設定することが非常に困難であ
るばかりではなく、シリンダ内で生ずる小渦流が末だ十
分に多量とはならない。本発明の目的は、上記吸気流を
主流と副流とに分けて吸入する方式の直接噴射式ディー
ゼルエンジンの欠点を改良し、シリンダ内に効果的に小
渦流を生じさせる吸気装置を提供するにある。以下、図
によつて詳しく説明する。第１，２図は、公知の主流、
副流を生起させる吸気装置の一例を示すもので、吸気ボ
ート１の渦巻部２付近にせり出し部３，３ａを一体ある
いは別体で形成し、吸気弁５を通つてシリンダ４内へ吸
入される吸気流を主としてスワールに寄与する主流と該
主流に衝突する副流に分けたものである。Not only is it extremely difficult to optimally set the collision position for combustion using only the main and side streams sucked in from the intake boat, but the small eddy currents generated within the cylinder are not large enough. . An object of the present invention is to improve the drawbacks of the direct injection diesel engine, which divides the intake air flow into a main flow and a side flow, and to provide an intake device that effectively generates a small vortex flow within a cylinder. be. This will be explained in detail below using figures. Figures 1 and 2 show the known mainstream,
This is an example of an intake device that generates a side flow, in which protruding portions 3 and 3a are formed integrally or separately near the swirl portion 2 of the intake boat 1, and the air is sucked into the cylinder 4 through the intake valve 5. The intake flow is divided into a main stream that mainly contributes to swirl and a side stream that collides with the main stream.
すなわち、せり出し部３は、渦巻部２の入口付近に設け
られ、従米の吸気通路壁（図の破線部分）と比べて吸気
通路１中へ突出しており、一方のせり出し壁３ａも同様
に渦巻部２の入口付近に設けられている。このため、吸
気流Ｐは渦巻部２の比較的中心付近を流れてスワールを
作る主流Ｐ１と、該主流Ｐ１に衝突する副流Ｐ２に分け
られる。この副流Ｐ２は渦倦部２の周壁に沿つて一回転
し、せリ出し部３ａに偏向されてシリンダ内へ吸入され
る流れであリ、せり出し部３は渦巻部２の周壁に沿う流
れを作リ易くするものである。この衝突により小渦流ｍ
が生じて主流が攪乱され、燃料の拡散と燃料と空気の混
合が良好となる。上記公知の吸気装置を補完し、かつ改
良した本発明の吸気装置を以下説明する。That is, the protruding part 3 is provided near the entrance of the spiral part 2 and protrudes into the intake passage 1 compared to the conventional intake passage wall (the broken line part in the figure), and one of the protruding walls 3a is also located near the spiral part 2. It is located near the entrance of 2. Therefore, the intake air flow P is divided into a main flow P1 that flows relatively near the center of the swirl portion 2 and creates a swirl, and a side flow P2 that collides with the main flow P1. This side flow P2 is a flow that rotates once along the circumferential wall of the vortex part 2, is deflected by the protruding part 3a, and is sucked into the cylinder; This makes it easier to create. This collision causes a small vortex m
occurs, the mainstream is disturbed, and the diffusion of fuel and the mixing of fuel and air are improved. The intake device of the present invention, which complements and improves the above-mentioned known intake device, will be described below.
第３，４，５図を参照して、吸気ボート１１は前述の主
流および副流を生じさせる公知の吸気ボートであリ、渦
巻部１２の入口付近には流れＱを渦巻部１２の比較的中
心付近を流れる主流ｑと渦巻部周壁に沿う流れＱ′７と
に分ける構造物（この図ではせり出し部Ｓｌ，Ｓ２とし
て示す）が設けられている。Referring to FIGS. 3, 4, and 5, the intake boat 11 is a known intake boat that generates the above-mentioned main stream and side flow, and a flow Q is provided near the inlet of the volute part 12 relative to the volute part 12. A structure (shown as protruding portions S1 and S2 in this figure) is provided to separate the main flow q flowing near the center and the flow Q'7 along the circumferential wall of the spiral portion.
以上のような、公知の吸気ボート構造に加え、本発明で
は渦巻部１２に偏向部材１３を形成する。In addition to the known intake boat structure as described above, in the present invention, a deflection member 13 is formed in the spiral portion 12.
偏向部材１３は、渦巻部１２の入口に対向する内壁に突
出して形成され、上面１３１と下面１３２とを有してお
リ、上面１３１は弁軸方向と略直交し、下面１３２は上
面１３１よりも弁軸方向へ傾いている。上面１３１及び
下面１３２は流れｑ′を渦巻部１２の壁面に沿つてせリ
出し部Ｓ２まで流れてシリンダ内に流入する流れＱ１と
、下向きに流入する流れＱ２とを作る役目を果たす。The deflection member 13 is formed to protrude from the inner wall facing the inlet of the spiral portion 12 and has an upper surface 131 and a lower surface 132. is also tilted toward the valve axis. The upper surface 131 and the lower surface 132 serve to create a flow Q1 that causes the flow q' to flow along the wall surface of the spiral portion 12 to the protruding portion S2 and into the cylinder, and a flow Q2 that flows downward.
これによつて主流ｑと渦巻部に沿つて流れる空気がせり
出し部Ｓ２に当つて生ずる副流Ｑ１がよリ効果的に衝突
するよう設定することができる，更に、偏向部材１３の
下面に当る吸人空気の流れＱ２が、第３の副流となり、
これがＱ，Ｑｌと衝突して、その位置で多量の小渦流ｍ
１を生じさせる。As a result, it is possible to set the main flow q and the side flow Q1 generated when the air flowing along the spiral portion hits the protruding portion S2 to collide more effectively. The flow of human air Q2 becomes the third substream,
This collides with Q and Ql, and a large amount of small eddy current m is generated at that position.
1.
この小渦流ｍ１はスワールに乗つて圧縮行程時、燃料が
噴射される時まで維持される。このため、燃料と空気の
ミキシングが一層向上するものとなる。又、ＱをＱ１と
合流させる際、Ｑ２の流量を制御することによリ、Ｑ′
＋Ｑ２（主流）とＱ１ （副流）の比率を容易に制御出
来、最良の燃焼状態にスワール及び小渦流を調整出来る
。This small vortex m1 rides on the swirl and is maintained during the compression stroke until the fuel is injected. Therefore, the mixing of fuel and air is further improved. Also, when Q merges with Q1, by controlling the flow rate of Q2, Q'
The ratio of +Q2 (main stream) and Q1 (side stream) can be easily controlled, and the swirl and small eddies can be adjusted for the best combustion condition.
以上のとおリ、本発明は吸気ボートの渦巻部を流れる吸
気流を横向きと下向きに分けることによリ、シリンダ内
で吸気流の衝突を確実かつ強力に行わせるものであり、
燃料噴射時のスワールの乱流状態を強力化して、燃料と
空気のミキシング又は燃料分布の均一化を一層良好とす
るものである。As described above, the present invention divides the intake air flow flowing through the volute part of the intake boat into horizontal and downward directions, so that the collision of the intake air flow within the cylinder is performed reliably and strongly.
The turbulent flow state of the swirl during fuel injection is strengthened to further improve the mixing of fuel and air or the uniformity of fuel distribution.
第１図は従来の単一吸気ボートによる吸気装置の一例を
示す略断面図、第２図は第１図の平面図第３図は本発明
の一実施例を示す略断面図、第４図は第３図の平面図、
第５図は第４図のＡ−Ａ矢視図である。FIG. 1 is a schematic sectional view showing an example of a conventional intake device using a single intake boat, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a schematic sectional view showing an embodiment of the present invention. is the plan view of Figure 3,
FIG. 5 is a view taken along the line A--A in FIG. 4.
Claims (1)
る副流とに分流させるため、吸気ボードの渦巻部人口付
近に吸気流を案内するせり出し構造をシリンダヘッドに
設け、吸気流を渦巻部の比較的中心付近を流れる主流と
渦巻部周壁に沿う流れに分け、シリンダに吸入される流
れを主流と副流とに分けたディーゼルエンジンの吸気装
置において、前記渦巻部の人口と対向する位置付近に偏
向部材を突設し、該偏向部材は前記渦巻部周壁に沿う流
れを下向きに偏向させる下面と、前記渦巻部周壁に沿う
流れを横向きに維持させる上面とを有し、前記上面は弁
軸と略直交し、前記下面は上面よりも弁軸方向へ傾斜し
ていることを特徴とするディーゼルエンジンの吸気装置
。1. In order to divide the intake air flow into a main flow that contributes to the swirl and a side flow that collides with the main flow, a protruding structure is provided on the cylinder head to guide the intake air flow near the swirl portion of the intake board, and the intake air flow is directed to the swirl portion of the intake board. In a diesel engine intake system that divides the flow taken into the cylinder into a main stream flowing relatively near the center and a flow along the circumferential wall of the volute part, the flow taken into the cylinder is divided into the main flow and the side flow. A deflection member is provided in a protruding manner, and the deflection member has a lower surface that deflects the flow downward along the circumferential wall of the spiral portion, and an upper surface that maintains the flow horizontally along the circumferential wall of the spiral portion, and the upper surface is connected to the valve shaft. An intake system for a diesel engine, wherein the lower surface is substantially perpendicular to the valve axis and the lower surface is inclined toward the valve axis direction than the upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54016733A JPS5926776B2 (en) | 1979-02-17 | 1979-02-17 | Diesel engine intake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54016733A JPS5926776B2 (en) | 1979-02-17 | 1979-02-17 | Diesel engine intake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55109724A JPS55109724A (en) | 1980-08-23 |
| JPS5926776B2 true JPS5926776B2 (en) | 1984-06-30 |
Family
ID=11924459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54016733A Expired JPS5926776B2 (en) | 1979-02-17 | 1979-02-17 | Diesel engine intake system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5926776B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6169574A (en) * | 1984-09-07 | 1986-04-10 | 日本水産株式会社 | Salmon roe packed food and manufacture thereof |
| JPH0211341Y2 (en) * | 1985-01-21 | 1990-03-20 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5950582A (en) * | 1998-06-08 | 1999-09-14 | Ford Global Technologies, Inc. | Internal combustion engine with variable camshaft timing and intake valve masking |
| US5957096A (en) * | 1998-06-09 | 1999-09-28 | Ford Global Technologies, Inc. | Internal combustion engine with variable camshaft timing, charge motion control valve, and variable air/fuel ratio |
| US5960755A (en) * | 1998-06-09 | 1999-10-05 | Ford Global Technologies, Inc. | Internal combustion engine with variable camshaft timing and variable duration exhaust event |
| KR20040035961A (en) * | 2002-10-14 | 2004-04-30 | 현대자동차주식회사 | Intake port apparatus for diesel engine |
-
1979
- 1979-02-17 JP JP54016733A patent/JPS5926776B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6169574A (en) * | 1984-09-07 | 1986-04-10 | 日本水産株式会社 | Salmon roe packed food and manufacture thereof |
| JPH0211341Y2 (en) * | 1985-01-21 | 1990-03-20 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55109724A (en) | 1980-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5950850B2 (en) | Internal combustion engine intake system | |
| JPH07119472A (en) | Intake device for engine | |
| US4098246A (en) | Internal combustion engine with an auxiliary combustion chamber | |
| JPS5926776B2 (en) | Diesel engine intake system | |
| JPS5840647B2 (en) | Internal combustion engine intake system | |
| JPH08200023A (en) | Cylinder head structure of internal combustion engine | |
| JP3559130B2 (en) | In-cylinder injection engine | |
| JPS5926777B2 (en) | Internal combustion engine intake passage | |
| KR200241942Y1 (en) | Gas Engine Air / Fuel Mixer | |
| JP3014802B2 (en) | Engine intake structure | |
| JPH06213081A (en) | Exhaust gas recirculation system of engine | |
| JPH0752336Y2 (en) | Diesel engine intake port shape | |
| JP3523498B2 (en) | Engine swirl intake port | |
| JP2000120440A (en) | Cylinder injection type spark ignition engine | |
| JP2533569Y2 (en) | Throttle body in fuel injector | |
| JP2921215B2 (en) | Intake device for internal combustion engine | |
| JP2003113719A (en) | Control device and swirl generator for internal combustion engine | |
| JP2521460Y2 (en) | Internal combustion engine intake port | |
| JPH0988607A (en) | Swirl chamber type combustion chamber for diesel engine | |
| KR880001726Y1 (en) | Air susction apparatus for fuel direct injection engine | |
| JPS633423Y2 (en) | ||
| JPH09177641A (en) | Intake device of internal combustion engine | |
| JP2777718B2 (en) | 4-stroke engine | |
| JPH09222063A (en) | Intake device for internal combustion engine | |
| JPH0231776B2 (en) |