JPS60230511A - Suction system for internal-combustion engine - Google Patents
Suction system for internal-combustion engineInfo
- Publication number
- JPS60230511A JPS60230511A JP59085144A JP8514484A JPS60230511A JP S60230511 A JPS60230511 A JP S60230511A JP 59085144 A JP59085144 A JP 59085144A JP 8514484 A JP8514484 A JP 8514484A JP S60230511 A JPS60230511 A JP S60230511A
- Authority
- JP
- Japan
- Prior art keywords
- intake port
- sub
- intake
- combustion chamber
- valve
- 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
- F02B31/08—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/20—SOHC [Single overhead camshaft]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
-
- 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】
［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、特に吸気流に強
力なスワール及びタービュランスを付与させて燃焼性の
向上を図り得る内燃機関の吸気装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an intake system for an internal combustion engine, and particularly to an intake system for an internal combustion engine that can improve combustibility by imparting strong swirl and turbulence to the intake air flow. Regarding.
［従来の技術］
内燃機関には、燃焼室にスワール及びタービュランスを
生起させて燃焼性の向上を図る装置を設けているものが
ある。この装置は、吸気ポートを燃焼室に対し偏心させ
て設置する方法、吸気弁にシュラウドを設置する方法、
吸気弁上部の吸気通路内に渦巻部を設けたへりカルポー
トによる方法等の種々方法によりスワール及びタービュ
ランスを付与させている。[Prior Art] Some internal combustion engines are equipped with a device that generates swirl and turbulence in a combustion chamber to improve combustibility. This device includes a method of installing the intake port eccentrically with respect to the combustion chamber, a method of installing a shroud on the intake valve,
Swirl and turbulence are imparted by various methods such as a helical port method in which a swirl portion is provided in the intake passage above the intake valve.
［発明が解決しようとする問題点］
ところで、内燃機関においては、第３図に示す如く、吸
気弁６が燃焼室８の略真上に位置しているものがある。[Problems to be Solved by the Invention] Incidentally, in some internal combustion engines, the intake valve 6 is located substantially directly above the combustion chamber 8, as shown in FIG.
このような構成では、吸気が燃焼室８の上方から下方に
向って流入するだけである。In such a configuration, intake air only flows into the combustion chamber 8 from above to below.
このため、従来、種々の提案がなされていたが、吸気流
に充分にスワール及びタービュランスを付与させ、ある
いは永続的に維持させることが困難であり、混合気性状
を改善し得す、燃焼性の向上を充分に果すことができな
かった。For this reason, various proposals have been made in the past, but it has been difficult to sufficiently impart swirl and turbulence to the intake air flow, or to maintain it permanently. I was unable to make sufficient improvements.
［発明の目的］
そこでこの発明の目的は、上述の不都合を除去し、副吸
気ポートを燃焼室の接線方向に指向させるとともに副−
吸気ポートの終端開口をシリンダデツキ面に平行な平行
成分を付与せしめることにより、吸気流にピストンの圧
縮行程においても圧潰されず寿命の長い強力なスワール
及びタービュランスを付与させ、混合気性状を改善し、
燃焼性の向上を図り得る内燃機関の吸気装置を実現する
にある。[Object of the Invention] Therefore, the object of the present invention is to eliminate the above-mentioned disadvantages, direct the sub-intake port in the tangential direction of the combustion chamber, and also direct the sub-intake port in the tangential direction of the combustion chamber.
By giving the end opening of the intake port a parallel component parallel to the cylinder deck surface, the intake air is given strong swirl and turbulence that does not get crushed even during the compression stroke of the piston and has a long life, improving the air-fuel mixture properties. ,
An object of the present invention is to realize an intake device for an internal combustion engine that can improve combustibility.
［問題点を解決するための手段］
この目的を達成するためにこの発明は、吸気ポートに副
吸気ポートを開口始端して設け、この副吸気ポートを燃
焼室の接線方向に指向させて開口終端して設けるととも
にこの終端開口にシリンダデツキ面に平行な平行成分を
付与せしめ、前記副吸気ボート途中には弁機構を設けた
ことを特徴とする。[Means for Solving the Problems] In order to achieve this object, the present invention provides an intake port with a sub-intake port at the opening start end, and the sub-intake port is oriented in the tangential direction of the combustion chamber to open at the end. In addition, the terminal opening is provided with a parallel component parallel to the cylinder deck surface, and a valve mechanism is provided in the middle of the sub-intake boat.
［作用］
このようにこの発明を構成することにより、副吸気ポー
トからの吸気を燃焼室の接線方向に流入させ、吸気流に
ピストンの圧縮行程においても圧潰されず寿命の長い強
力なスワール及びタービュランスを付与させる。これに
より混合気性状が改善され、燃焼性の向上が果される。[Operation] By configuring the present invention in this way, the intake air from the sub-intake port is allowed to flow in the tangential direction of the combustion chamber, and the intake air is created with strong swirl and turbulence that has a long life and is not crushed even during the compression stroke of the piston. be granted. This improves the air-fuel mixture properties and improves combustibility.
また、副吸気ポート途中に介設した弁機構は、燃焼室の
燃焼ガス等の気体が吸気ポートに流出するのを阻止し、
機関出力の低下を防止する。In addition, the valve mechanism installed in the middle of the sub-intake port prevents gases such as combustion gas from the combustion chamber from flowing out to the intake port.
Prevents a decrease in engine output.
［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。[Examples] Examples of the present invention will be described below in detail and specifically based on the drawings.
第１．２図はこの発明の実施例を示すものである。図に
おいて、２は吸気通路、２ｐは吸気ポート、４は吸気口
、６は吸気弁、６ａは吸気弁ステム、８は燃焼室、１０
はピストン、１２は排気口、１４は排気弁、１４ａは排
気弁ステム、１６は排気通路、１６ｐは排気ボート、１
８はガスケットである。前記吸気弁６は、動弁機構２０
のロッカアーム２２に連結されている。すなわち、吸気
弁ステム６ａの先端は、弁調整ねじ２４の先端部２４ａ
に当接し、この弁調整ねじ２４は前記ロッカアーム２２
の一端部２２ａに装着されている。Figure 1.2 shows an embodiment of the invention. In the figure, 2 is an intake passage, 2p is an intake port, 4 is an intake port, 6 is an intake valve, 6a is an intake valve stem, 8 is a combustion chamber, 10
is a piston, 12 is an exhaust port, 14 is an exhaust valve, 14a is an exhaust valve stem, 16 is an exhaust passage, 16p is an exhaust boat, 1
8 is a gasket. The intake valve 6 is connected to a valve mechanism 20.
is connected to the rocker arm 22 of. That is, the tip of the intake valve stem 6a is connected to the tip 24a of the valve adjustment screw 24.
This valve adjustment screw 24 is in contact with the rocker arm 22.
It is attached to one end portion 22a of the.
また、前記ロッカアーム２２は、ロッカアームシャフト
２６により揺動可能に支持され、ロッカアーム２２の他
端部２２ｂはクランクシャフト（図示せず）に連結する
カムシャフト２８に当接している。Further, the rocker arm 22 is swingably supported by a rocker arm shaft 26, and the other end 22b of the rocker arm 22 is in contact with a camshaft 28 connected to a crankshaft (not shown).
前記吸気ポー）２ｐには、副吸気ポート３０が開口始端
して設けられ、この副吸気ポート３０は燃焼室８の接線
方向３２に指向して開口終端して設けられている。すな
わち、前記副吸気ポート３０は、上流側副吸気ポー）３
０−１と下流側副吸気ポート３０−２とからなり、この
上流側副吸気ポー）３０−１と下流側副吸気ポー）３０
−２との間には凹部３４が形成されている。前記上流側
副吸気ポー）３（１−１は、吸気ポート２ｐに開口始端
して設けられるとともに、この上流側副吸気ポー）３０
−１は前記凹部３４に開口終端して設けられている。ま
た、前記凹部３４には下流側副吸気ポー）３０−２が開
口始端して設けられるとともに、この下流側副吸気ポー
ト３０−２の終端開口はシリンダデツキ面３６に平行な
平行成分が付与されて設けられる。これにより、副吸気
ポート３０からの吸気を、下流側副吸気ポート３〇−２
を介して燃焼室８の水平方向成分に直線的に誘導させ、
燃焼室８及びシリンダ周縁に沿って流入（白抜きの矢印
方向）すべく構成する。In the intake port 2p, a sub-intake port 30 is provided with an open end, and the sub-intake port 30 is provided with an open end facing in the tangential direction 32 of the combustion chamber 8. That is, the sub-intake port 30 is an upstream sub-intake port) 3
0-1 and a downstream sub-intake port 30-2, the upstream sub-intake port) 30-1 and the downstream sub-intake port) 30
-2, a recessed portion 34 is formed. The upstream sub-intake port) 3 (1-1 is provided with an opening end at the intake port 2p, and the upstream sub-intake port) 30
-1 is provided in the recess 34 with an open end. Further, a downstream sub-intake port 30-2 is provided in the recess 34 as an opening starting end, and the terminal opening of the downstream sub-intake port 30-2 has a parallel component parallel to the cylinder deck surface 36. It will be established. As a result, the intake air from the sub-intake port 30 is transferred to the downstream sub-intake port 30-2.
linearly guided into the horizontal component of the combustion chamber 8 through
It is configured to flow into the combustion chamber 8 and along the cylinder periphery (in the direction of the white arrow).
前記副吸気ポート３０途中には、この副吸気ポート３０
を開閉する弁機構である例えばポペット弁３８が介装さ
れる。このポペット弁３８は、前記吸気弁６と同様にロ
ッカアーム２２により作動する。前記ポペット弁３８の
傘部４０は、前記凹部３４内に配設され、この傘部４０
が弁座４２に接離することにより、副吸気ポート３０を
開閉すべく構成する。This sub-intake port 30 is located midway through the sub-intake port 30.
For example, a poppet valve 38, which is a valve mechanism for opening and closing, is interposed. This poppet valve 38 is operated by the rocker arm 22 similarly to the intake valve 6. The umbrella portion 40 of the poppet valve 38 is disposed within the recess 34, and the umbrella portion 40
The auxiliary intake port 30 is opened and closed by moving toward and away from the valve seat 42.
以下、この実施例の作用について説明する。The operation of this embodiment will be explained below.
吸気行程時、吸気弁６は、ロッカアーム２２により作動
して吸気口４を開放する。これにより、燃焼室８には、
吸気ポー）２ｐからの吸気が下方に向って流入する。ま
たこのとき、？ペット弁３８が作動して副吸気ポート３
０を開放する。これにより、燃焼室８において、副吸気
ポート３０からの吸気の流入（白抜きの矢印方向）によ
り、吸気流に強力にスワール及びタービュランスを付与
せしめることができる。During the intake stroke, the intake valve 6 is actuated by the rocker arm 22 to open the intake port 4. As a result, the combustion chamber 8 has
Intake air from intake port 2p flows downward. At this time again? The pet valve 38 operates and the auxiliary intake port 3
Release 0. Thereby, in the combustion chamber 8, the intake air flows in from the auxiliary intake port 30 (in the direction of the white arrow), thereby strongly imparting swirl and turbulence to the intake air flow.
したがって、従東、燃焼室８において、吸気は上方から
下方に向ってのみ流入していたので、吸気流に充分にス
ワール及びタービニランスを付与させ、あるいは永続的
に維持させることが困難であった。しかし、この発明に
よれば、吸気を副吸気ポート３０から燃焼室８の接線方
向に、つまり燃焼室８内壁面に沿って流入させることに
より、吸気流に好ましい水平成分の強力で、しかもピス
トンの圧縮行程においても圧潰されず寿命の長いスワー
ル及びタービニランスを付与させることができる。これ
により、混合気性状を改善し得て、燃焼性の改善を図り
得る。また、スワール及びタービニランスが付与された
吸気流は、燃焼室８内壁面の消炎層（クウェンチ層）内
にも作用し、未燃炭化水素（ＨＣ）を良好に剥離し、高
温の燃焼室８中央部に誘導することができ、未燃炭化水
素（ＨＣ）を燃焼させることが可能である。Therefore, in the combustion chamber 8, the intake air flows only from the top to the bottom, making it difficult to sufficiently impart or permanently maintain swirl and turbinirance to the intake air flow. However, according to the present invention, by causing the intake air to flow in from the sub-intake port 30 in the tangential direction of the combustion chamber 8, that is, along the inner wall surface of the combustion chamber 8, a strong horizontal component that is preferable for the intake air flow can be achieved, and the piston It is possible to provide swirl and turbinirance with a long life without being crushed even during the compression stroke. Thereby, the air-fuel mixture properties can be improved, and combustibility can be improved. In addition, the intake air flow imparted with swirl and turbinirance also acts on the quench layer on the inner wall surface of the combustion chamber 8, effectively stripping off unburned hydrocarbons (HC), and It is possible to combust unburned hydrocarbons (HC).
また、副吸気ポート３０途中に介装したポペット弁３８
は、吸気弁６が吸気口４を閉鎖すべく動弁機構２０によ
り作動した時、この吸気弁６の作動とともに副吸気ポー
ト３０を閉鎖すべく作動する。これにより、燃焼室８の
燃焼ガス等の気体が吸気ポート２ｐに流出するのを阻止
することができる。しかも、ポペット弁３８は、燃焼室
８から離間して設けられているので、ポペット弁３８が
燃焼室８の高熱部位に位置せず、熱的負荷の低減を図り
、その機能を長く維持することができる。In addition, a poppet valve 38 interposed in the middle of the sub-intake port 30
When the intake valve 6 is operated by the valve operating mechanism 20 to close the intake port 4, it operates to close the sub-intake port 30 together with the operation of the intake valve 6. Thereby, gas such as combustion gas in the combustion chamber 8 can be prevented from flowing out to the intake port 2p. Moreover, since the poppet valve 38 is provided apart from the combustion chamber 8, the poppet valve 38 is not located in a high-heat area of the combustion chamber 8, reducing thermal load and maintaining its function for a long time. I can do it.
更に、副吸気ポート３０途中に弁機構を介設することが
できるので、弁機構の設計自由度が高くなる。Furthermore, since a valve mechanism can be interposed in the middle of the sub-intake port 30, the degree of freedom in designing the valve mechanism is increased.
［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、
燃焼室の接線方向に指向させて副吸気ポートを設けると
ともに副吸気ポートの終端開口をシリンダデツキ面に平
行な平行成分を付与せしめることにより、燃焼室にピス
トンの圧縮行程においても圧潰されず寿命の長い強力な
スワール及びタービニランスを燃焼室全域にわたって容
易に付与させ、混合気性状を改善し得て、燃焼性の向上
を図り得る。また、副吸気ポート途中に弁機構を設ける
ことにより、燃焼ガス等の気体が燃焼室から吸気ポート
側に流出するのを阻止し、機関出力の低下を防止し得る
。[Effects of the Invention] As is clear from the detailed explanation above, according to the present invention,
By providing a sub-intake port oriented in the tangential direction of the combustion chamber and by giving the terminal opening of the sub-intake port a parallel component parallel to the cylinder deck surface, the combustion chamber is not crushed during the compression stroke of the piston and has a long service life. A long and strong swirl and turbinirance can be easily applied throughout the combustion chamber, improving the air-fuel mixture properties and improving combustibility. Further, by providing a valve mechanism in the middle of the sub-intake port, it is possible to prevent gas such as combustion gas from flowing out from the combustion chamber to the intake port side, thereby preventing a decrease in engine output.
第１．２図はこの発明の実施例を示すもので、第１図は
吸気装置を示す概略縦断面図、第２図は燃焼室の概略平
面図である。
第３図は従来の吸気装置を示す概略縦断面図である。
図において、２は吸気通路、２ｐは吸気ボート、６は吸
気弁、８は燃焼室、１４は排気弁、１６は排気通路、１
６ｐは排気ポート、２０は動弁機構、２２はロッカアー
ム、２８はカムシャフト、３０は副吸気ポート、３０−
１は上流側副吸気ポート、３０−２は下流側副吸気ポー
ト、３４は凹部、そして３８はポペット弁である。
代理人 弁理士 西 郷 義 美
〃 弁理士原田幸男
第１図
第２図1.2 shows an embodiment of the present invention, FIG. 1 is a schematic vertical sectional view showing an intake device, and FIG. 2 is a schematic plan view of a combustion chamber. FIG. 3 is a schematic vertical sectional view showing a conventional intake device. In the figure, 2 is an intake passage, 2p is an intake boat, 6 is an intake valve, 8 is a combustion chamber, 14 is an exhaust valve, 16 is an exhaust passage, 1
6p is an exhaust port, 20 is a valve mechanism, 22 is a rocker arm, 28 is a camshaft, 30 is a sub-intake port, 30-
1 is an upstream sub-intake port, 30-2 is a downstream sub-intake port, 34 is a recess, and 38 is a poppet valve. Agent Patent Attorney Yoshimi Saigo Patent Attorney Yukio Harada Figure 1 Figure 2
Claims (1)
吸気ポートを燃焼室の接線方向に指向させて開口終端し
て設けるとともにこの終端開口にシリンダデツキ面に平
行な平行成分を付与せしめ、前記副吸気ポート途中には
弁機構を設けたことを特徴とする内燃機関の吸気装置。A sub-intake port is provided at the intake port with an opening start end, the sub-intake port is oriented in the tangential direction of the combustion chamber and is provided with an open end, and the terminal opening is given a parallel component parallel to the cylinder deck surface, An intake system for an internal combustion engine, characterized in that a valve mechanism is provided in the middle of an auxiliary intake port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59085144A JPS60230511A (en) | 1984-04-28 | 1984-04-28 | Suction system for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59085144A JPS60230511A (en) | 1984-04-28 | 1984-04-28 | Suction system for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60230511A true JPS60230511A (en) | 1985-11-16 |
Family
ID=13850462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59085144A Pending JPS60230511A (en) | 1984-04-28 | 1984-04-28 | Suction system for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60230511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2869359A1 (en) * | 2004-04-22 | 2005-10-28 | Renault Sas | ADMISSION CIRCUIT COMPRISING AN ORIFICE PROVIDED WITH AN ENTAIL FOR CONFERING AN ENOUGH GAS TOURBILLONARY MOVEMENT |
-
1984
- 1984-04-28 JP JP59085144A patent/JPS60230511A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2869359A1 (en) * | 2004-04-22 | 2005-10-28 | Renault Sas | ADMISSION CIRCUIT COMPRISING AN ORIFICE PROVIDED WITH AN ENTAIL FOR CONFERING AN ENOUGH GAS TOURBILLONARY MOVEMENT |
| EP1591642A1 (en) * | 2004-04-22 | 2005-11-02 | Renault s.a.s. | Air intake system containing an opening provided with a notch to confer a swirling movement on intake gases |
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