JPS6346662Y2 - - Google Patents
Info
- Publication number
- JPS6346662Y2 JPS6346662Y2 JP4323481U JP4323481U JPS6346662Y2 JP S6346662 Y2 JPS6346662 Y2 JP S6346662Y2 JP 4323481 U JP4323481 U JP 4323481U JP 4323481 U JP4323481 U JP 4323481U JP S6346662 Y2 JPS6346662 Y2 JP S6346662Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- wall
- flow
- swirl
- combustion chamber
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 27
- 238000010586 diagram Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】 本考案は吸気装置に関するものである。[Detailed explanation of the idea] The present invention relates to an intake device.
デイーゼルエンジンの吸気ポートは、第１図及
び第２図に示すように燃焼室内にスワールを生じ
るようにスパイラル形状になつている。 The intake port of a diesel engine has a spiral shape to create a swirl within the combustion chamber, as shown in FIGS. 1 and 2.
同吸気ポート２における吸気流れは、第１図に
示すように外側壁４に沿つた流れA1が燃焼室６
の内壁８に接するように流入して強力なスワール
を生じ、又、内側壁１０に沿つた流れA2が燃焼
室６の中心部近傍に指向して流入し抵抗少なく大
量に流入する。ここで、より強力なスワールを得
るためには、内側壁１０を外側壁４方向に突出さ
せ、流れA3によつて燃焼室６の内壁８に接する
ように流入させている。 As shown in FIG. 1, the intake flow at the intake port 2 is a flow A1 along the outer wall 4,
The flow A 2 flows in contact with the inner wall 8 of the combustion chamber 6 to generate a strong swirl, and the flow A 2 along the inner wall 10 flows toward the center of the combustion chamber 6 and flows in a large amount with little resistance. Here, in order to obtain a stronger swirl, the inner wall 10 is made to protrude in the direction of the outer wall 4, and the flow A3 is caused to flow into the combustion chamber 6 so as to be in contact with the inner wall 8.
又、第２図に示すように底壁１２に沿つた流れ
A4が燃焼室６に対し斜め方向に流入して強力な
るスワールを発生し、上壁１４に沿つた流れA5
は燃焼室６に対して中心方向に指向して流入し抵
抗少なく大量に流入する。 Also, as shown in FIG. 2, the flow along the bottom wall 12
A 4 flows obliquely into the combustion chamber 6, generating a strong swirl, and the flow A 5 flows along the upper wall 14.
The fuel flows into the combustion chamber 6 toward the center, and flows in a large amount with little resistance.
上記従来の吸気装置によれば、所定のエンジン
回転速度における吸気量及びスワール強さを設定
できるが、同回転速度以下ではスワールが弱くな
りすぎ、又、同回転速度以上ではスワールが強く
なりすぎそれぞれ燃焼が悪化するとともに、特に
最高回転速度近傍におけるスワールの過大な増加
によつて吸気量が低減し、最高回転速度及び出力
が制限される不具合があつた。 According to the above-mentioned conventional intake system, it is possible to set the intake air amount and swirl strength at a predetermined engine rotation speed, but below the same rotation speed, the swirl becomes too weak, and above the same rotation speed, the swirl becomes too strong. In addition to deteriorating combustion, there was a problem in that the amount of intake air was reduced due to an excessive increase in swirl especially near the maximum rotation speed, and the maximum rotation speed and output were limited.
又、スワール強さ（スワール回転速度／エンジ
ン回転速度）は燃焼のためには第３図に示すよう
に、低回転速度高トルク発生時に強く（高スワー
ル領域Ｈ）、中回転速度中〜高トルク発生時に中
程度（中スワール領域Ｍ）、低回転速度低トルク
発生時〜高回転速度時に弱くする（弱スワール領
域Ｌ）ことが好ましいが、上記従来の吸気装置に
よつては、スワール強さを制御できない不具合が
あり、又、機械的絞り弁によりスワール強さを制
御する改良された吸気装置が提案されているが、
耐久性、吸気通路抵抗の発生等の面から実用的で
ない不具合があつた。本考案は上記に鑑み提案さ
れたもので、エンジンの燃焼室に連通する吸気ポ
ート、同吸気ポートの一方の壁に形成されて下流
が拡大された段部、同段部下流に設けられた空気
噴出孔、同空気噴出孔に空気を供給する空気供給
装置を備え、空気噴出孔から空気を噴出させて吸
気ポート内の吸気流れを変化せしめるよう構成し
たことを特徴とする吸気装置を要旨とする。 In addition, the swirl strength (swirl rotational speed/engine rotational speed) is strong for combustion, as shown in Figure 3, it is strong when low rotational speed and high torque is generated (high swirl region H), and it is strong at medium rotational speed and medium to high torque. It is preferable that the swirl strength is moderate when generated (medium swirl region M) and weak at low rotational speeds and low torques to high rotational speeds (weak swirl region L). However, improved intake systems have been proposed that control the swirl strength using mechanical throttle valves.
There were some problems that made it impractical in terms of durability, intake passage resistance, etc. The present invention was proposed in view of the above, and consists of an intake port that communicates with the combustion chamber of the engine, a step formed on one wall of the intake port to enlarge the downstream side, and an air intake port provided downstream of the step. The gist of the invention is an intake device comprising a blowout hole and an air supply device that supplies air to the air blowout hole, and configured to blow out air from the air blowout hole to change the flow of intake air in the intake port. .
次に本考案の第１実施例を第４図に沿つて説明
する。以下第１図〜第２図に示した要素と同一要
素には同一符号を付して説明を省略する。 Next, a first embodiment of the present invention will be described with reference to FIG. Hereinafter, the same elements as those shown in FIGS. 1 and 2 will be denoted by the same reference numerals, and the description thereof will be omitted.
２０はスパイラル形状に形成された吸気ポート
２の外側壁４に突出形成された絞り部材で、最大
絞り部下流側を急激に外側壁４まで拡大して段部
を形成する。 Reference numeral 20 denotes a constriction member formed protruding from the outer wall 4 of the intake port 2 formed in a spiral shape, and the downstream side of the maximum constriction portion is suddenly expanded to the outer wall 4 to form a stepped portion.
２２は上記絞り部材２０の下流近傍に設けられ
た空気噴出孔で、制御装置２４を介してエアポン
プ２６に連通されている。 Reference numeral 22 denotes an air jet hole provided near the downstream side of the throttle member 20, which is communicated with an air pump 26 via a control device 24.
上記制御装置２４及びエアポンプ２６は、第３
図特性に沿うように作動し、すなわち、低回転速
度高負荷時には空気噴出を停止して以下説明する
ように燃焼室６内に強スワールを発生させ、中回
転速度中〜高負荷時には少量の空気を供給して以
下説明するように燃焼室６内に中スワールを発生
させ、低回転速度低負荷時〜高回転速時には多量
の空気を供給して以下説明するように燃焼室６内
に弱スワールを発生させる。 The control device 24 and the air pump 26 are connected to the third
In other words, at low rotation speeds and high loads, air injection is stopped and a strong swirl is generated in the combustion chamber 6 as explained below, and at medium rotation speeds and medium to high loads, a small amount of air is generated. is supplied to generate a medium swirl in the combustion chamber 6 as explained below, and at low rotation speeds and low loads to high rotation speeds, a large amount of air is supplied to generate a weak swirl in the combustion chamber 6 as explained below. to occur.
上記実施例における気流について以下説明す
る。 The airflow in the above embodiment will be explained below.
空気噴出孔２２から空気が供給されていないと
きには、吸気ポート２内側壁１０に沿つた流れ
B1、中央付近の流れB2、外側壁４に沿つた流れ
B3はそれぞれ実線に示すように流れ、流れB1は
内側壁１０に沿つて燃焼室６の中心近傍に抵抗少
なく流入し、流れB2は略直線的に流入し、流れ
B3は絞り部材２０の下流において外側壁４との
間に生じる渦により外側壁４に接するように偏向
され、外側壁４に沿つて流入して燃焼室６内にお
けるスワール成分を強化する。 When air is not supplied from the air outlet 22, the air flows along the inner wall 10 of the intake port 2.
B 1 , flow near the center B 2 , flow along the outer wall 4
B 3 flows as shown by the solid lines, flow B 1 flows along the inner wall 10 near the center of the combustion chamber 6 with little resistance, flow B 2 flows approximately linearly, and the flow
B 3 is deflected so as to come into contact with the outer wall 4 by a vortex generated between the throttle member 20 and the outer wall 4 downstream of the throttle member 20 and flows along the outer wall 4 to strengthen the swirl component within the combustion chamber 6 .
空気噴出孔２２から二重破線で示すように空気
が供給されると、該部分の渦が消えて正圧となる
ため、流れB3は絞り部材２０の下流側部が図示
破線で示すように剥離し、同様に流れB2にも影
響し、全体としての流れが内側壁１０方向に押圧
され、燃焼室６の中心近傍に抵抗少なく且つスワ
ールを弱めるように流入する。 When air is supplied from the air jet hole 22 as shown by the double broken line, the vortex in that part disappears and a positive pressure is created, so that the flow B 3 flows from the downstream side of the throttle member 20 as shown by the broken line in the figure. The separation also affects the flow B2 , and the entire flow is pushed toward the inner wall 10 and flows into the vicinity of the center of the combustion chamber 6 with less resistance and weakens the swirl.
従つて本実施例によれば、空気噴出孔２２から
空気を供給しないときには、吸気ポート２内の各
流れは、主に各側壁に沿つて流れ、主に外側壁４
に生じる渦によつて生じる負圧により吸引されて
同外側壁４に沿う流れB3によつて燃焼室６内の
スワールを強化し、又、空気噴出孔２２から空気
を供給したときには流れB3が外側壁４から剥離
して内側壁１０方向に押圧され、全体として燃焼
室６内のスワールを弱め抵抗少なく大量に供給さ
れ、エンジン回転速度、負荷等に応じた適切なス
ワールを得ることができる効果を奏する。 Therefore, according to this embodiment, when air is not supplied from the air outlet 22, each flow in the intake port 2 mainly flows along each side wall, and mainly flows along the outer wall 4.
The swirl inside the combustion chamber 6 is strengthened by the flow B 3 along the outer wall 4 which is attracted by the negative pressure generated by the vortex generated in the vortex, and when air is supplied from the air jet hole 22, the flow B 3 is separated from the outer wall 4 and pressed toward the inner wall 10, weakening the swirl in the combustion chamber 6 as a whole and being supplied in large quantities with less resistance, making it possible to obtain an appropriate swirl depending on the engine speed, load, etc. be effective.
第５図は本考案の第２実施例を示し、第１実施
例における吸気ポート２内に、仕切壁２８を設け
その上流端縁３０を、空気の供給によつて変化す
る流れB3の変化位置より下流側に位置せしめた
もので、流れB3の外側壁４からの剥離を確実な
らしめ、且つ、該剥離した流れB3の流れ方向を
任意に設定でき、自由度が増大する効果を奏す
る。 FIG. 5 shows a second embodiment of the present invention, in which a partition wall 28 is provided in the intake port 2 in the first embodiment, and the upstream edge 30 of the partition wall 28 is connected to the flow B 3 that changes depending on the supply of air. This is located downstream from the position, and ensures that the flow B 3 is separated from the outer wall 4, and the flow direction of the separated flow B 3 can be set arbitrarily, increasing the degree of freedom. play.
第６図は本考案の第３実施例を示し、絞り部材
２０を底壁１２に突出形成し吸気ポート２内に仕
切壁２８を設けたもので、空気噴出孔２２から空
気を供給しないときには各流れは図中実線で示す
ように、主に底壁１２に吸引されて同底壁１２に
沿つた流れC3によつて、燃焼室６内におけるス
ワールを強化し、上壁１４に沿つた流れC1によ
つて燃焼室６中央方向に抵抗少なく大量の吸気が
供給され、中央部分の流れC2によつて弱いスワ
ールを伴なつた吸気が供給される。 FIG. 6 shows a third embodiment of the present invention, in which a throttle member 20 is formed protruding from the bottom wall 12 and a partition wall 28 is provided inside the intake port 2. When air is not supplied from the air jet hole 22, each The flow, as shown by the solid line in the figure, is mainly caused by the flow C3 that is attracted to the bottom wall 12 and flows along the bottom wall 12, which strengthens the swirl in the combustion chamber 6 and causes the flow to flow along the top wall 14. C 1 supplies a large amount of intake air with little resistance toward the center of the combustion chamber 6, and the flow C 2 in the center supplies intake air with a weak swirl.
空気噴出孔２２から空気を供給したときには、
流れC3及びC2は、破線で示すように上壁１４方
向に押圧され、下壁１２に沿う成分が減少するた
めスワールを低減し且つ抵抗少なく大量の吸気が
供給される。 When air is supplied from the air outlet 22,
Flows C 3 and C 2 are pushed in the direction of the upper wall 14 as shown by the broken line, and the component along the lower wall 12 is reduced, thereby reducing swirl and supplying a large amount of intake air with less resistance.
従つて本実施例によつても上記第１実施例同様
の効果を奏する。又、上記第２実施例同様に仕切
壁２８を設けることによつて、第２実施例同様に
吸気流れの剥離及び流れ方向の設定が確実に行な
える効果を奏する。 Therefore, this embodiment also provides the same effects as the first embodiment. Further, by providing the partition wall 28 as in the second embodiment, it is possible to reliably separate the intake air flow and set the flow direction as in the second embodiment.
第７図は本考案の第４実施例を示しており、絞
り部材２０を吸気ポート２の内側壁１０に設けた
ものである。 FIG. 7 shows a fourth embodiment of the present invention, in which a throttle member 20 is provided on the inner wall 10 of the intake port 2.
本実施例によれば、空気噴出孔２２から空気が
噴出されないときには吸気ポート２内の各流れ
D1，D2，D3は実線で示すように主に内側壁１０
側に吸引偏向され、及び内側壁４に沿つて流れ、
空気噴出孔２２から空気が噴出されたときには流
れD1は破線で示すように内側壁１０から剥離し、
全体として外側壁４方向に押圧されて流れ、燃焼
室６内におけスワールは空気が噴出されないとき
よりも強化される。 According to this embodiment, when air is not ejected from the air ejection hole 22, each flow inside the intake port 2
D 1 , D 2 , and D 3 are mainly connected to the inner wall 10 as shown by the solid line.
is suction-deflected to the side and flows along the inner wall 4;
When air is ejected from the air ejection hole 22, the flow D1 separates from the inner wall 10 as shown by the broken line,
As a whole, the air flows while being pressed in the direction of the outer wall 4, and the swirl within the combustion chamber 6 is stronger than when no air is ejected.
従つて本実施例によつても空気噴出孔２２から
の空気を、制御装置２４及びエアポンプ２６によ
つて適宜制御することにより、エンジン回転速度
及び負荷に応じた適切なスワールを得ることがで
きる効果を奏する。 Therefore, in this embodiment as well, by appropriately controlling the air from the air jet holes 22 by the control device 24 and the air pump 26, it is possible to obtain an appropriate swirl according to the engine speed and load. play.
第８図は本考案の第５実施例を示しており、絞
り部材２０を吸気ポート２の上壁１４に設けたも
ので、本実施例によつても第４実施例同様の作用
効果を奏する。 FIG. 8 shows a fifth embodiment of the present invention, in which a throttle member 20 is provided on the upper wall 14 of the intake port 2, and this embodiment also achieves the same effects as the fourth embodiment. .
第９図は本考案の第６実施例を示し、吸気ポー
ト２の外側壁４に形成された絞り部材２０は最大
絞り以降徐々に拡大する翼型断面を成し、その後
急激に外側壁４まで拡大する段部３２を有してい
る。３４は空気噴出孔２２と並列に設けられた空
気噴出孔で、絞り部材２０の最大絞り近傍に開口
されている。３６は空気吸引孔で、エアポンプ２
６の吸入孔に連結されている。 FIG. 9 shows a sixth embodiment of the present invention, in which the throttle member 20 formed on the outer wall 4 of the intake port 2 forms an airfoil cross section that gradually expands after the maximum throttle, and then suddenly reaches the outer wall 4. It has an expanding step 32. Reference numeral 34 denotes an air ejection hole provided in parallel with the air ejection hole 22, and is opened near the maximum aperture of the aperture member 20. 36 is an air suction hole, air pump 2
It is connected to No. 6 suction hole.
上記構成により、各空気噴出孔２２，３４から
空気が噴出されないときには、内側壁１０に沿つ
た流れE1は燃焼室６の中心方向に指向して流入
し、外側壁４に沿つた流れE3は絞り部材２０に
沿つて流れ、段部３２の下流に生じる渦によつて
外側壁２０に吸引偏向されて同外側壁に沿い、燃
焼室６に流入してスワールを強化する。 With the above configuration, when air is not ejected from each air ejection hole 22, 34, the flow E1 along the inner wall 10 flows toward the center of the combustion chamber 6, and the flow E3 along the outer wall 4 flows toward the center of the combustion chamber 6. flows along the throttle member 20, is attracted to and deflected by the outer wall 20 by the vortex generated downstream of the step portion 32, flows along the outer wall, and flows into the combustion chamber 6 to strengthen the swirl.
又、空気噴出孔２２，３４から空気が噴出され
ると、流れE3は空気噴出孔３４から噴出される
空気によつて破線で示すように絞り部材２０表面
から剥離し、さらに空気噴出孔２２から噴出され
る空気によつて強制的に偏向され、且つ、空気吸
引孔３６によつて各流れE1，E2，E3が内側壁１
０方向に偏向されることにより、全体として流れ
は内側壁１０方向に押圧され、スワールが少なく
大量の吸気が燃焼室６に吸入される。 Furthermore, when air is ejected from the air ejection holes 22 and 34, the flow E 3 is separated from the surface of the throttle member 20 as shown by the broken line by the air ejected from the air ejection hole 34, and further flows through the air ejection hole 22. Each flow E 1 , E 2 , E 3 is forcibly deflected by the air ejected from the inner wall 1 by the air suction hole 36 .
By being deflected in the 0 direction, the flow as a whole is pushed toward the inner wall 10, and a large amount of intake air with little swirl is drawn into the combustion chamber 6.
従つて、本実施例によれば第１実施例同様の作
用効果を奏するとともに、空気噴出孔３４、空気
吸引３６によつて、より強力且つ確実に流れを偏
向せしめる作用効果を奏する。 Therefore, according to this embodiment, the same effects as those of the first embodiment can be achieved, and the air jet holes 34 and the air suction 36 can deflect the flow more strongly and reliably.
第１０図は本考案の第７実施例を示し、第６実
施例同様に段部３２を有した絞り部材２０を吸気
ポート２の底壁１２に形成したもので、第６実施
例同様の作用効果を奏する。 FIG. 10 shows a seventh embodiment of the present invention, in which a throttle member 20 having a stepped portion 32 is formed on the bottom wall 12 of the intake port 2 as in the sixth embodiment, and the function is similar to that in the sixth embodiment. be effective.
第１図は従来の吸気ポートを示す概略説明図、
第２図は第１図の−断面説明図、第３図は燃
焼室内スワール特性図、第４図は本考案の第１実
施例を示す概略説明図、第５図〜第１０図はそれ
ぞれ本考案の第２〜第７実施例を示す概略説明図
である。
２…吸気ポート、４…外側壁、６…燃焼室、１
０…内側壁、１２…底壁、１４…上壁、２０…絞
り部材、２２…空気噴出孔。
FIG. 1 is a schematic explanatory diagram showing a conventional intake port,
Fig. 2 is a cross-sectional explanatory diagram of Fig. 1, Fig. 3 is a combustion chamber swirl characteristic diagram, Fig. 4 is a schematic explanatory diagram showing the first embodiment of the present invention, and Figs. It is a schematic explanatory drawing which shows the 2nd - 7th Example of an invention. 2...Intake port, 4...Outside wall, 6...Combustion chamber, 1
0...Inner wall, 12...Bottom wall, 14...Upper wall, 20...Aperture member, 22...Air jet hole.
Claims (1)
気ポートの一方の壁に形成されて下流側が拡大さ
れた段部、同段部下流に設けられた空気噴出孔、
同空気噴出孔に空気を供給する空気供給装置を備
え、空気噴出孔から空気を噴出させて吸気ポート
内の吸気流れを変化せしめるよう構成したことを
特徴とする吸気装置。 An intake port that communicates with the combustion chamber of the engine, a step formed on one wall of the intake port and enlarged on the downstream side, an air jet hole provided downstream of the step,
What is claimed is: 1. An intake device comprising: an air supply device that supplies air to the air outlet, and configured to blow out air from the air outlet to change the flow of intake air in an intake port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4323481U JPS6346662Y2 (en) | 1981-03-26 | 1981-03-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4323481U JPS6346662Y2 (en) | 1981-03-26 | 1981-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57156025U JPS57156025U (en) | 1982-09-30 |
| JPS6346662Y2 true JPS6346662Y2 (en) | 1988-12-02 |
Family
ID=29840230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4323481U Expired JPS6346662Y2 (en) | 1981-03-26 | 1981-03-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6346662Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0450425Y2 (en) * | 1985-05-17 | 1992-11-27 |
-
1981
- 1981-03-26 JP JP4323481U patent/JPS6346662Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57156025U (en) | 1982-09-30 |
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