JP2921215B2 - Intake device for internal combustion engine - Google Patents
Intake device for internal combustion engineInfo
- Publication number
- JP2921215B2 JP2921215B2 JP3278536A JP27853691A JP2921215B2 JP 2921215 B2 JP2921215 B2 JP 2921215B2 JP 3278536 A JP3278536 A JP 3278536A JP 27853691 A JP27853691 A JP 27853691A JP 2921215 B2 JP2921215 B2 JP 2921215B2
- Authority
- JP
- Japan
- Prior art keywords
- intake
- intake passage
- internal combustion
- combustion engine
- outlet
- 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 - Fee Related
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
- F02B31/08—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は内燃機関の吸気装置に
係り、特に内燃機関の低負荷運転域に縦方向スワールを
効果的に生起させるとともに、高負荷運転域に通気抵抗
を減少して機関出力を向上し得る内燃機関の吸気装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for an internal combustion engine, and more particularly, to an engine which effectively generates vertical swirl in a low load operation range of an internal combustion engine and reduces airflow resistance in a high load operation range. The present invention relates to an intake device for an internal combustion engine capable of improving output.
【０００２】[0002]
【従来の技術】内燃機関においては、燃料と空気との混
合を促進して燃焼室内での燃焼を良好にする必要があ
る。この燃焼改善の手段の一として、縦方向スワールの
燃焼システムがある。縦スワールを生起させる場合に、
例えば、吸気ポートを特異な形状とし、吸気弁の上側の
流れを強くさせている。2. Description of the Related Art In an internal combustion engine, it is necessary to promote the mixing of fuel and air to improve combustion in a combustion chamber. One means of improving combustion is a vertical swirl combustion system. When creating a vertical swirl,
For example, the intake port has a unique shape, and the flow above the intake valve is strengthened.
【０００３】このような吸気装置としては、例えば、特
公昭４９−４０８８４号公報、実開昭６３−１１０６３
１号公報、特公昭６０−１１２０５号公報に開示されて
いる。特公昭４９−４０８８４号公報に記載のものは、
吸気ポートから気化器よりの混合気をシリンダ内燃焼室
へ供給する系路と、気化器の側圧によって作動するコン
トロールバルブで流量制御される空気を燃焼室内に直接
供給する系路とを形成し、吸気ポート開口部の吸気弁座
に環状に配した複数の穴からコントロールバルブを通っ
た空気を吐出するようにし、空気を吸気弁座に案内させ
て燃焼室内に供給させ、燃焼性を改善するものである。
また、実開昭６３−１１０６３１号公報に記載のもの
は、ストレートポートからなる主吸気ポートを形成し、
燃焼室内に吸入される燃焼用混合気流中に水平軸線を中
心として旋回する縦方向スワール流を発生させ、燃焼性
を図るものである。更に、特公昭６０−１１２０５号公
報に記載のものは、２個の分岐吸気通路を備えた内燃機
関において、吸気の一部を燃焼室内へ斜めに噴出する副
吸気通路を備えると共に、副吸気通路の噴出口を、シリ
ンダ内壁面の分岐壁に対し略対称をなす位置を指向する
よう各分岐吸気通路に形成し、燃焼室内に強い渦流を生
起させるものである。[0003] Such an intake device is disclosed in, for example, Japanese Patent Publication No. 49-40884, and Japanese Utility Model Laid-Open Publication No. 63-11063.
No. 1 and Japanese Patent Publication No. Sho 60-11205. What is described in JP-B-49-40884 is
Forming a system for supplying air-fuel mixture from the carburetor from the intake port to the combustion chamber in the cylinder, and a system for directly supplying air whose flow rate is controlled by a control valve operated by the side pressure of the carburetor into the combustion chamber, Improves flammability by discharging air that has passed through a control valve from a plurality of holes arranged annularly in the intake valve seat at the intake port opening, guiding the air to the intake valve seat and supplying it to the combustion chamber, It is.
Further, the one described in Japanese Utility Model Laid-Open No. 63-110631 forms a main intake port composed of a straight port,
A vertical swirl flow swirling around a horizontal axis is generated in a combustion air-fuel mixture sucked into the combustion chamber, thereby achieving combustibility. Further, Japanese Patent Publication No. Sho 60-11205 discloses an internal combustion engine having two branch intake passages, in which an auxiliary intake passage for obliquely ejecting a part of intake air into a combustion chamber is provided. Is formed in each branch intake passage so as to point to a position substantially symmetrical with respect to the branch wall of the inner wall surface of the cylinder, thereby generating a strong vortex in the combustion chamber.
【０００４】[0004]
【発明が解決しようとする課題】ところが、従来におけ
る内燃機関の吸気系にあっては、副吸気通路の出口が主
吸気通路の吸気流に対して直角方向に指向して設けられ
ていたり、主吸気通路の内面形状が徒に変更されてしま
う等の理由で、内燃機関の全出力時に、副吸気通路から
の吸気によって吸気抵抗が増加し、機関出力が低下する
という不都合があった。However, in the conventional intake system of an internal combustion engine, the outlet of the sub intake passage is provided so as to be directed at right angles to the intake air flow of the main intake passage, For example, at the time of full output of the internal combustion engine, there is a disadvantage that intake air from the auxiliary intake passage increases intake resistance and decreases engine output because the internal shape of the intake passage is suddenly changed.
【０００５】[0005]
【課題を解決するための手段】そこで、この発明は、上
述の不都合を除去するために、内燃機関の燃焼室に吸気
を導く主吸気通路とこの主吸気通路とは別系統で吸気を
前記燃焼室に導く副吸気通路とを備えた内燃機関の吸気
装置において、前記主吸気通路に吸気絞り弁を配設し、
この吸気絞り弁の上流には前記副吸気通路の入口を開口
して設け、前記内燃機関のシリンダヘッドに形成した吸
気口の略上部位から前記シリンダヘッドのヘッド端面と
略平行な基準線を抽出し、前記副吸気通路の出口の中心
を前記基準線よりも低位置に配設するとともに前記出口
の中心を通る前記副吸気通路の出口側中心線を前記基準
線の下方で前記出口が上方に指向すべく前記基準線に対
して所定角度で配設したことを特徴とする。SUMMARY OF THE INVENTION Therefore, in order to eliminate the above-mentioned disadvantages, the present invention provides a main intake passage for guiding intake air to a combustion chamber of an internal combustion engine, and the combustion using a different system from the main intake passage. In an intake device for an internal combustion engine having a sub intake passage leading to a chamber, an intake throttle valve is disposed in the main intake passage,
An inlet of the sub intake passage is opened and provided upstream of the intake throttle valve, and a reference line substantially parallel to the head end surface of the cylinder head is extracted from a portion substantially above the intake port formed in the cylinder head of the internal combustion engine. The center of the outlet of the auxiliary intake passage is disposed at a position lower than the reference line, and the outlet side center line of the auxiliary intake passage passing through the center of the outlet is located below the reference line and the outlet is located upward. It is characterized by being arranged at a predetermined angle with respect to the reference line so as to be oriented.
【０００６】[0006]
【作用】この発明の構成によれば、内燃機関の低負荷運
転域において、主吸気通路の吸気量が少ない一方、副吸
気通路からの吸気流速が大きくなり、吸気弁上流側の吸
気の流れが副吸気通路からの吸気流によって吸気弁の一
側である上側に移動し、これにより、吸気が燃焼室内に
流入したときに、燃焼室・シリンダ内に縦方向スワール
を効果的に生成させ、燃焼性を向上させることができ
る。一方、内燃機関の全出力時等の高負荷運転域におい
ては、主吸気通路の吸気量が多くなり、副吸気通路から
の吸気流が略無視され、通気抵抗が減少され、機関出力
が向上する。According to the structure of the present invention, in the low load operation range of the internal combustion engine, while the intake air amount in the main intake passage is small, the flow velocity of intake air from the sub intake passage becomes large, and the flow of intake air upstream of the intake valve is reduced. The intake air from the auxiliary intake passage moves to the upper side, which is one side of the intake valve, so that when the intake air flows into the combustion chamber, a vertical swirl is effectively generated in the combustion chamber / cylinder, and the combustion is performed. Performance can be improved. On the other hand, in a high load operation range such as at full output of the internal combustion engine, the amount of intake air in the main intake passage increases, the intake air flow from the sub intake passage is almost ignored, the ventilation resistance is reduced, and the engine output is improved. .
【０００７】[0007]
【実施例】以下図面に基づいてこの発明の実施例を詳細
且つ具体的に説明する。図１〜図５は、この発明の実施
例を示すものである。図１において、２は内燃機関、４
はシリンダブロック、６はシリンダヘッド、８は燃焼
室、１０はシリンダ、１２は吸気管である。シリンダヘ
ッド６の傾斜上面には、吸気口１４が形成されている。
この吸気口１４には、バルブシート（図示せず）が設置
されている。また、この吸気口１４は、吸気弁１６によ
って開閉される。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 5 show an embodiment of the present invention. In FIG. 1, 2 is an internal combustion engine, 4
Is a cylinder block, 6 is a cylinder head, 8 is a combustion chamber, 10 is a cylinder, and 12 is an intake pipe. An intake port 14 is formed on the inclined upper surface of the cylinder head 6.
The intake port 14 is provided with a valve seat (not shown). The intake port 14 is opened and closed by an intake valve 16.
【０００８】前記吸気口１４には、吸気管１２の底部位
で形成された主吸気通路１８の下端側が連通される。こ
の主吸気通路１８の上端側には、吸気絞り弁２０が配設
されている。The lower end of a main intake passage 18 formed at the bottom of the intake pipe 12 communicates with the intake port 14. An intake throttle valve 20 is arranged on the upper end side of the main intake passage 18.
【０００９】この絞り弁２０近傍の吸気管１２の底部位
には、図１、２に示す如く、吸気絞り弁２０の少し上流
に、副吸気通路２２の入口２４が開口して形成されてい
る。この副吸気通路２２は、断面が円形状あるいは楕円
形状に形成され、入口２４側の入口側副吸気通路２２−
１と出口２６側の出口側副吸気通路２２−２とからな
る。As shown in FIGS. 1 and 2, an inlet 24 of a sub intake passage 22 is formed at a bottom portion of the intake pipe 12 near the throttle valve 20, slightly upstream of the intake throttle valve 20. . The auxiliary intake passage 22 has a circular or elliptical cross section, and has an inlet-side auxiliary intake passage 22- on the inlet 24 side.
1 and an outlet-side auxiliary intake passage 22-2 on the outlet 26 side.
【００１０】この出口側副吸気通路２２−２の出口２６
は、以下の如き配設される。即ち、まず、前記吸気口１
４の略上部位であるバルブシートの上部位（Ａ）からシ
リンダヘッド６のヘッド端面６Ｃと略平行な基準線Ｈを
抽出する。この基準線Ｈは、図１において水平線であ
る。前記出口側副吸気通路２２−２の出口２６の中心Ｂ
は、基準線Ｈよりも高さＤだけ少許低い位置に配設され
る。The outlet 26 of the outlet side auxiliary intake passage 22-2
Are arranged as follows. That is, first, the intake port 1
A reference line H substantially parallel to the head end face 6C of the cylinder head 6 is extracted from the upper part (A) of the valve seat, which is substantially the upper part of FIG. This reference line H is a horizontal line in FIG. Center B of the outlet 26 of the outlet side auxiliary intake passage 22-2
Is disposed at a position slightly lower than the reference line H by a height D.
【００１１】この出口２６の中心Ｂを通る出口側副吸気
通路２２−２の出口側中心線Ｃは、基準線Ｈの下方で、
出口２６が主吸気通路１８内で上方に指向すべく、基準
線Ｈに対して所定の角度θ（例えば２０o 〜４０o ）で
配設される。The outlet side center line C of the outlet side auxiliary intake passage 22-2 passing through the center B of the outlet 26 is below the reference line H,
The outlet 26 is disposed at a predetermined angle θ (for example, 20 ° to 40 ° ) with respect to the reference line H so as to point upward in the main intake passage 18.
【００１２】また、図４に示す如く、出口側副吸気通路
２２−２の出口側中心線Ｃは、主吸気通路１８の中心線
Ｙ上に位置している。つまり、出口側吸気通路２２−２
は、主吸気通路１８の中心線Ｙに対して左右対称（軸対
象）に配設されている。As shown in FIG. 4, the outlet side center line C of the outlet side sub intake passage 22-2 is located on the center line Y of the main intake passage 18. That is, the outlet side intake passage 22-2
Are arranged symmetrically (axially) with respect to the center line Y of the main intake passage 18.
【００１３】また、図５に示す如く、シリンダヘッド６
に２つの第１、第２吸気口３０−１、３０−２が並列に
形成されている内燃機関２にあっては、第１、第２吸気
管３２−１、３２−２で形成された第１、第２主吸気通
路３４−１、３４−２に対応させて第１、第２副吸気通
路３６−１、３６−２を設けるとともに、第１、第２副
吸気通路３６−１、３６−２間の中心線Ｃを第１、第２
主吸気通路３４−１、３４−２の中心線Ｙ上に位置さ
せ、第１、第２副吸気通路３６−１、３６−２をこの中
心線Ｙに対して左右対称に配設する。Further, as shown in FIG.
In the internal combustion engine 2 in which two first and second intake ports 30-1 and 30-2 are formed in parallel, the first and second intake pipes 32-1 and 32-2 are formed. First and second sub intake passages 36-1 and 36-2 are provided corresponding to the first and second main intake passages 34-1 and 34-2, and first and second sub intake passages 36-1 and 36-2 are provided. The center line C between 36-2 is first and second
The first and second sub intake passages 36-1 and 36-2 are disposed symmetrically with respect to the center line Y while being positioned on the center line Y of the main intake passages 34-1 and 34-2.
【００１４】次に、この実施例の作用を説明する。Next, the operation of this embodiment will be described.
【００１５】内燃機関２の低負荷運転域にあっては、図
２に示す如く、吸気絞り弁２０が閉状態にあり、主吸気
通路１８の吸気量が減少しする一方、吸気絞り弁２０側
の入口２４からの吸気量が増加し、つまり吸気流が大き
くなり、これにより、主吸気通路１８内の底部側の吸気
流が副吸気通路２２の出口２６からの強い吸気流によっ
て押されて吸気口１４の上部位（Ａ位置）側に移動され
る。これにより、吸気弁１６が吸気口１４を開成した際
に、吸気が内燃機関２の燃焼室８・シリンダ１０内で縦
方向スワールとなって旋回し、よって、燃料と空気とが
効果的に混合し、燃焼性が向上される。In the low load operation range of the internal combustion engine 2, as shown in FIG. 2, the intake throttle valve 20 is in a closed state, and the amount of intake air in the main intake passage 18 is reduced. The amount of intake air from the inlet 24 of the intake passage increases, that is, the intake air flow increases, whereby the intake air flow on the bottom side in the main intake passage 18 is pushed by the strong intake air flow from the outlet 26 of the sub intake passage 22 and The mouth 14 is moved to the upper part (A position) side. Thereby, when the intake valve 16 opens the intake port 14, the intake air turns as a vertical swirl in the combustion chamber 8 and the cylinder 10 of the internal combustion engine 2, so that the fuel and the air are effectively mixed. And the flammability is improved.
【００１６】一方、内燃機関２が全出力時等で高負荷運
転域にあっては、図３に示す如く、吸気絞り弁２０が開
動作して主吸気通路１８への吸気量が増加する一方、副
吸気通路２２への吸気量が減少される。このため、副吸
気通路２２からの吸気流を略無視することができ、もっ
て、通気抵抗を減少して機関出力を向上させることがで
きる。On the other hand, when the internal combustion engine 2 is in a high load operation range at full output or the like, as shown in FIG. 3, the intake throttle valve 20 opens to increase the amount of intake air to the main intake passage 18. , The amount of intake air to the sub intake passage 22 is reduced. For this reason, the intake air flow from the auxiliary intake passage 22 can be substantially ignored, so that the airflow resistance can be reduced and the engine output can be improved.
【００１７】この結果、内燃機関２の低負荷運転域にあ
っては、縦方向スワールを効果的に生起させて燃焼性を
向上させるとともに、高負荷運転域にあっては、通気抵
抗を減少して機関出力を向上させることができる。As a result, in the low-load operation range of the internal combustion engine 2, the longitudinal swirl is effectively generated to improve the combustibility, and in the high-load operation range, the ventilation resistance is reduced. As a result, the engine output can be improved.
【００１８】[0018]
【発明の効果】以上詳細な説明から明らかなようにこの
発明によれば、主吸気通路に吸気絞り弁を配設し、この
吸気絞り弁の上流には副吸気通路の入口を開口して設
け、内燃機関のシリンダヘッドに形成した吸気口の略上
部位からシリンダヘッドのヘッド端面と略平行な基準線
を抽出し、副吸気通路の出口の中心を基準線よりも低位
置に配設するとともに出口の中心を通る副吸気通路の出
口側中心線を基準線の下方で出口が上方に指向すべく基
準線に対して所定角度で配設したことにより、内燃機関
の低負荷運転域に副吸気通路からの吸気によって縦方向
スワールを効果的に生起させるとともに高負荷運転域に
は通気抵抗を減少して機関出力を向上させ得る。As is apparent from the above detailed description, according to the present invention, the intake throttle valve is disposed in the main intake passage, and the inlet of the sub intake passage is provided upstream of the intake throttle valve. Extracting a reference line substantially parallel to the head end face of the cylinder head from a portion substantially above the intake port formed in the cylinder head of the internal combustion engine, and disposing the center of the outlet of the sub intake passage at a position lower than the reference line By arranging the center line on the outlet side of the auxiliary intake passage passing through the center of the outlet at a predetermined angle with respect to the reference line so that the outlet is directed downward and below the reference line, the auxiliary intake passage is located in the low load operation range of the internal combustion engine. Vertical swirl is effectively generated by the intake air from the passage, and the engine output can be improved by reducing the ventilation resistance in a high load operation range.
【図１】内燃機関の吸気装置のシステム構成図である。FIG. 1 is a system configuration diagram of an intake device of an internal combustion engine.
【図２】内燃機関の低負荷運転域における吸気流状態を
示す概略図である。FIG. 2 is a schematic diagram showing an intake air flow state in a low load operation range of the internal combustion engine.
【図３】内燃機関の高負荷運転域における吸気流状態を
示す概略図である。FIG. 3 is a schematic diagram showing an intake air flow state in a high load operation range of the internal combustion engine.
【図４】一本の副吸気通路を備えた吸気装置の平面図で
ある。FIG. 4 is a plan view of an intake device having one auxiliary intake passage.
【図５】分岐した二本の副吸気通路を備えた吸気装置の
平面図である。FIG. 5 is a plan view of an intake device having two branched auxiliary intake passages.
２ 内燃機関 ８ 燃焼室 １０ シリンダ １４ 吸気口 １６ 吸気弁 １８ 主吸気通路 ２２ 副吸気通路 ２４ 入口 ２６ 出口 2 Internal combustion engine 8 Combustion chamber 10 Cylinder 14 Inlet 16 Inlet valve 18 Main intake passage 22 Sub intake passage 24 Inlet 26 Outlet
Claims (1)
路とこの主吸気通路とは別系統で吸気を前記燃焼室に導
く副吸気通路とを備えた内燃機関の吸気装置において、
前記主吸気通路に吸気絞り弁を配設し、この吸気絞り弁
の上流には前記副吸気通路の入口を開口して設け、前記
内燃機関のシリンダヘッドに形成した吸気口の略上部位
から前記シリンダヘッドのヘッド端面と略平行な基準線
を抽出し、前記副吸気通路の出口の中心を前記基準線よ
りも低位置に配設するとともに前記出口の中心を通る前
記副吸気通路の出口側中心線を前記基準線の下方で前記
出口が上方に指向すべく前記基準線に対して所定角度で
配設したことを特徴とする内燃機関の吸気装置。1. An intake system for an internal combustion engine, comprising: a main intake passage for guiding intake air to a combustion chamber of the internal combustion engine; and a sub intake passage for guiding intake air to the combustion chamber in a system separate from the main intake passage.
An intake throttle valve is provided in the main intake passage, and an inlet of the sub intake passage is opened and provided upstream of the intake throttle valve, and the intake throttle valve is formed substantially above an intake port formed in a cylinder head of the internal combustion engine. A reference line substantially parallel to the head end surface of the cylinder head is extracted, and the center of the outlet of the sub intake passage is disposed at a position lower than the reference line, and the center of the outlet side of the sub intake passage passing through the center of the outlet. An intake device for an internal combustion engine, wherein a line is disposed at a predetermined angle with respect to the reference line so that the outlet is directed upward below the reference line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3278536A JP2921215B2 (en) | 1991-09-30 | 1991-09-30 | Intake device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3278536A JP2921215B2 (en) | 1991-09-30 | 1991-09-30 | Intake device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0586872A JPH0586872A (en) | 1993-04-06 |
| JP2921215B2 true JP2921215B2 (en) | 1999-07-19 |
Family
ID=17598637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3278536A Expired - Fee Related JP2921215B2 (en) | 1991-09-30 | 1991-09-30 | Intake device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2921215B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030021449A (en) * | 2001-09-06 | 2003-03-15 | 현대자동차주식회사 | tumble induced intake port in automotive engine |
| JP4524617B2 (en) * | 2004-12-03 | 2010-08-18 | 日産自動車株式会社 | Intake control device and intake control method |
| JP2007071163A (en) * | 2005-09-08 | 2007-03-22 | Toyota Motor Corp | Intake port structure of internal combustion engine |
-
1991
- 1991-09-30 JP JP3278536A patent/JP2921215B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0586872A (en) | 1993-04-06 |
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