JPS5954732A - Intake apparatus for engine - Google Patents
Intake apparatus for engineInfo
- Publication number
- JPS5954732A JPS5954732A JP57164700A JP16470082A JPS5954732A JP S5954732 A JPS5954732 A JP S5954732A JP 57164700 A JP57164700 A JP 57164700A JP 16470082 A JP16470082 A JP 16470082A JP S5954732 A JPS5954732 A JP S5954732A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- load
- intake port
- low
- engine
- 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
- 238000002485 combustion reaction Methods 0.000 abstract description 17
- 230000009977 dual effect Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
- F02B31/085—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets having two inlet valves
-
- 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)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、エンジンの吸気装置、特に気筒ごとに一対の
吸気ポートを備え、一方の吸気ポートを低負荷用吸気ポ
ートとし、他方の吸気ポートを高負荷用吸気ポートとし
て、エンジンの低負荷運転時には、低負荷用吸気ポート
のみから吸気を供給し、高負荷運転時には低負荷用吸気
ポートおよび高負荷用吸気ポートの両方から吸気を供給
するようにした複式吸気装置の改良に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an intake system for an engine, in particular, a pair of intake ports for each cylinder, one of which is used as a low-load intake port, and the other intake port is used as a high-load intake port. , an improved dual intake system that supplies intake air only from the low-load intake port during low-load operation of the engine, and from both the low-load intake port and the high-load intake port during high-load operation. It is related to.
従来より、上記のように低負荷用および高負荷用吸気ポ
ートを備え、各吸気ポートを夫々吸気弁で開閉するよう
にした所謂２弁型式の複式吸気装置は公知である（特開
昭５’ ６−４４４０４ Ｊ公報参照）。Conventionally, a so-called two-valve type dual intake device is known, which is provided with intake ports for low load and high load as described above, and each intake port is opened and closed by an intake valve, respectively (Japanese Patent Application Laid-Open No. 5-1999). 6-44404 J Publication).
この２弁型式の複式吸気装置は、吸気１＋ｉの少ない低
負荷運転時に、吸気流を絞り込んで流速をＩＰめて燃焼
室内にスワールを生成てきるのて良好な燃焼性を得るこ
とができるうえ、個々の吸気弁の重量を減少できるので
動弁機構の負荷を軽減でき、エンジンの高出力、高回転
を保証ｔ７うる利点がある。This two-valve type dual intake system can obtain good combustibility by narrowing down the intake air flow and increasing the flow velocity to create a swirl in the combustion chamber during low-load operation with less intake air 1+i. Since the weight of each intake valve can be reduced, the load on the valve mechanism can be reduced, which has the advantage of guaranteeing high engine output and high rotation speed.
ところで、従来のこの種の複式吸気装置ｒ１では、低負
荷用、高負荷用吸気ポートをシリンダ中心線に関して相
反する方向にオフセットさせた＋ｔ／Ｉ造を採用してい
るか、低負荷用、高負荷用吸気ポー １、のシリンダヘ
ッドデツキ面に対する傾斜角は通気抵抗を可及的に減少
させるべく比較的大きなほぼ同一の角度に設定されてい
るため、低負荷用吸気 １ポートから燃焼室に流入する
吸気のマスが、低負 。By the way, in the conventional duplex intake system R1 of this type, a +t/I structure is adopted in which the intake ports for low load and high load are offset in opposite directions with respect to the cylinder center line, or the intake port for low load and high load is offset in opposite directions with respect to the cylinder center line. The angle of inclination of intake port 1 for low-load use with respect to the cylinder head deck surface is set to a relatively large and almost the same angle in order to reduce ventilation resistance as much as possible, so that air flows into the combustion chamber from intake port 1 for low-load use. Intake mass is low negative.
筒用吸気弁とポート而口部（バルブシ二白と″の間の間
隙をスムーズに通り抜けるてとかできず、吸気流に乱れ
が生じて）（成すべきスワールを強力 ：なものとする
ことができず低負荷時における燃焼性が不安定となる問
題があり、しかもエンジンの高負荷運転縛転時す氏負荷
用吸気ポートから流入した吸気流によって生成されるス
ワ−（しが、高負荷用吸気ボート！Ｊ）ら流入する吸気
流によって打消され、エンジンの燃焼性が不安定となっ
て７ツキングか発生するといった問題があった。
□本発明は、かかる問題□を解消すべくなされたもので
あって、低負荷用吸気ポートから燃焼室に流入する吸気
流によって生成子るスワールを強□化することができる
吸気ポート構造を有するエンジンの吸気装置を提供する
ことを基本的な目的としている。The intake valve for the cylinder and the port opening (cannot smoothly pass through the gap between the valve seat and the opening, causing turbulence in the intake flow) (the swirl that should be created cannot be made strong). However, there is a problem in that the combustibility becomes unstable at low loads, and when the engine is running under high loads, the swarm generated by the intake air flowing in from the high load intake ports. This was canceled out by the intake air flowing in from the boat! J), causing instability in the engine's combustion and causing problems such as engine failure.
□The present invention has been made to solve the problem □, and has an intake port structure that can strengthen the swirl generated by the intake air flow flowing into the combustion chamber from the low-load intake port. Its basic purpose is to provide an intake system for engines.
このため、本発明においては、相反した方向にオフセン
トさせた一対の吸気ポートのうち、低負荷用吸気ポート
からの吸気の流入角を高負荷用吸気スートのそれに比し
て小さく設定し、低負荷用吸気弁の開１時、該吸気弁と
弁座との間を吸気の■マズがストレートに通過しうるよ
うにしたことを基采的な特徴としている。For this reason, in the present invention, of a pair of intake ports offset in opposite directions, the inflow angle of intake air from the low-load intake port is set smaller than that of the high-load intake suit. The basic feature is that when the intake valve is opened, the intake air can pass straight between the intake valve and the valve seat.
以下、図示の実施例に基づいて本発明をより具体的に説
明する。Hereinafter, the present invention will be described in more detail based on illustrated embodiments.
第１図に示すように、気筒１は一対の吸気ポート２，３
と一対の排気ボーｊ７４．．．！５とを備え、比較的小
径の吸気ポート２は低負荷用吸気ポートきし、比較的大
径の吸気ポート３は高負荷用吸気ボートとして、この高
負荷用吸気ポート３の途中には、エンジンの負荷が設定
値に達するまでは全閉状態に保持され、設定値を越えた
エンジンの高負荷運転時には全開されるシャッタバルブ
６を設置している。As shown in FIG. 1, a cylinder 1 has a pair of intake ports 2 and 3.
and a pair of exhaust bows J74. ．． ．． ! 5, the relatively small-diameter intake port 2 serves as a low-load intake port, and the relatively large-diameter intake port 3 serves as a high-load intake boat. A shutter valve 6 is installed that is kept fully closed until the load reaches a set value, and is fully opened when the engine is operated at a high load exceeding the set value.
上記低負荷用吸気ポート２および高負荷用吸気ボート３
は、気筒１の中心線に関して相反する位置にオフセット
させて開口させ、図の例では、低負荷用吸気ポート２か
ら燃焼室８に流入する吸気流は、燃焼葦８の外周に沿っ
て反時針廻りに旋回するスワールＳを生成するようにす
るとともに、高負荷運転時において高負荷用吸気ボート
３を流下する吸気流は、」二記スワールＳ：□とは対向
する方向性をもって燃焼室８近傍
木話明においては、」−記スワールＳを強化するため、
第２図に示すように、低負荷用吸気ポート２のシリンダ
ヘッド９のデツキ面・９Ａに対する傾斜角を高負荷用吸
気ボート３のそれに比して小さく設定する。The above low load intake port 2 and high load intake boat 3
are opened at opposite positions with respect to the center line of the cylinder 1, and in the example shown in the figure, the intake air flowing into the combustion chamber 8 from the low-load intake port 2 flows along the outer periphery of the combustion reed 8 with the counter-hour hand. At the same time, the intake air flow flowing down the high-load intake boat 3 during high-load operation is directed toward the vicinity of the combustion chamber 8 with a direction opposite to the swirl S: □. In Mokuwamei, "-to strengthen Ki Swirl S,
As shown in FIG. 2, the angle of inclination of the low-load intake port 2 with respect to the deck surface 9A of the cylinder head 9 is set smaller than that of the high-load intake port 3.
この場合、動弁機構（具体的に図示せず）の複雑化を避
□けるため、低負荷用、高負荷用吸気ボート２，３を夫
々開閉する低負荷用、高負荷用吸気弁１０．１１（第２
図では重なっている。）の弁軸の傾きは同一の設定とし
、低負荷用吸気弁１０について示すように、弁座１２は
各弁軸方間に垂直となるように設定とするでとは従来と
同様である。In this case, in order to avoid complicating the valve mechanism (not specifically shown), the low-load and high-load intake valves 10. 11 (second
In the figure, they overlap. ) are set to have the same inclination, and as shown for the low-load intake valve 10, the valve seat 12 is set perpendicular to each valve shaft direction, as in the conventional case.
なお、第２図において、１ ：Ｊ、 、 １４ （図で
は重なっている。）は、排気ボート４，５を夫々開閉す
る排気弁である。In addition, in FIG. 2, 1:J, , 14 (overlapping in the figure) are exhaust valves that open and close the exhaust boats 4 and 5, respectively.
上記低負荷用吸気ポート２の傾斜角は、低負荷用吸気ポ
ート２の燃焼室８近傍の開１１部の中心線ｅ０が低負荷
用吸気弁１０の上面とほぼ平行となるように選定し、吸
気流が低負荷用吸気弁１０と弁座１２の間をストレート
に辿り抜けて燃焼室り内に流入し、流れを乱されること
なしに燃焼室８内において強力なスワールＳを形成する
ように配慮する。The inclination angle of the low-load intake port 2 is selected so that the center line e0 of the opening 11 near the combustion chamber 8 of the low-load intake port 2 is approximately parallel to the upper surface of the low-load intake valve 10, The intake air flows straight through between the low-load intake valve 10 and the valve seat 12, flows into the combustion chamber, and forms a strong swirl S in the combustion chamber 8 without disturbing the flow. be considerate.
一方、高負荷用吸気ボート１１の傾斜角は、低負荷用吸
気ポート２によって形成されるスワールＳを乱さないよ
うに低負荷用吸気ポート２のそれより太き（設定されて
おり、しかもその傾斜角はＦＷＸｆｆ７第２図に直線ｅ
２で示すように通気抵抗を可能な限り減少させて多１■
１の吸気をスムーズに燃焼室８に供給しうるような可能
な限り大きな角度に設定し、充填効率の向−りを図って
高出力を得ることが、好ましい。On the other hand, the inclination angle of the high-load intake boat 11 is set to be thicker than that of the low-load intake port 2 so as not to disturb the swirl S formed by the low-load intake port 2. The corner is a straight line e in FWXff7 Figure 2.
As shown in 2, reduce ventilation resistance as much as possible.
It is preferable to set the angle to be as large as possible so that the intake air of 1 can be smoothly supplied to the combustion chamber 8, and to aim for the direction of charging efficiency and obtain high output.
また、第３図および第４図に示すように、低負前用吸気
ポー１−２′を高負荷用吸気ポーｈ ：３の下方で湾曲
させ、投影面一１−における低負荷用吸気ポーＩ・２′
の開１１部中心線の傾斜角θを大きく設定することによ
り、スτノールＳの旋回半径ｒを大きくするようにすれ
は、それだけスワールＳの慣性を大きくすることかでき
る。In addition, as shown in FIGS. 3 and 4, the low-negative front intake port 1-2' is curved below the high-load intake port h:3, and the low-load intake port in the projection plane 1-1- is curved below the high-load intake port h:3. I・2'
By setting the inclination angle θ of the center line of the opening 11 to be large, the turning radius r of the swirl S can be increased, and the inertia of the swirl S can be increased accordingly.
さらに、第５図に示すように、低負荷用吸気ポーートｉ
’４投影而十、で高負荷用吸気ポート３″と交差する設
計とすれば、低負荷用吸気ポート２を流干する吸気流の
慣性方向を該吸気ポートｉの全長に亘って燃焼室８外周
の接線方向に平行となるように方向イ；１けすることか
できるので、より一層強力なスワールＳの生成が可能と
なる。Furthermore, as shown in Fig. 5, the low load intake port i
If the design is such that the intake port 3'' for high load intersects with the intake port 3'' for high load at 4 projection Since the direction can be set parallel to the tangential direction of the outer periphery, an even stronger swirl S can be generated.
以」二の説明から明らかなよう（乙本発明によれば、低
負荷用吸気ポートから燃焼室内に流入する吸気のスワー
ルを強化することができるから、低負荷運転時における
エンジンの悌焼性をより一層向」−することができ、ま
た低負荷運転から高負荷運転に移行する高負荷低回転運
転時におＧ）で、スワールを維持することがてきるから
燃焼の不安定（／ｌを招来することかなく、したがって
ノッキングを確実に防止することができるといった効１
社をｉすることかでき、この種複式吸気装置の利点をよ
り有効に発揮させることができる利点が得られる、７As is clear from the following explanation (B) According to the present invention, it is possible to strengthen the swirl of the intake air flowing into the combustion chamber from the low-load intake port, thereby improving the simmering performance of the engine during low-load operation. Furthermore, swirl can be maintained during high-load, low-speed operation when transitioning from low-load operation to high-load operation, resulting in combustion instability (/L). Therefore, the effect of being able to reliably prevent knocking is 1.
7. The advantages of this type of dual intake system can be demonstrated more effectively.
第１図は吸ｔ′Ｊ＋気ポートの構造を示す気筒の平面説
明図、第２図は本発明の一実施例を示ず気筒の垂直断面
説明図、第３図、第４図は本発明の他の実施例を示す夫
々要部垂直断面説明図、平面説明図、第５図は本発明の
いま−っの実ｌＩｌ！１例を示す第４図と同様の平面説
明図である。
・・・高負荷用吸気ポート、８・・・燃焼室、１０・・
・低負荷用吸気ポート、Ｊｌ・・・高負荷用吸気ポート
。
特 許 出 願 人 東洋工業株式会社代 理 人 弁
理士 青１（１葆ほか２名第１図
第２図 ３Fig. 1 is a plan explanatory view of a cylinder showing the structure of the intake t'J+ air port, Fig. 2 is an explanatory vertical cross-sectional view of the cylinder without showing an embodiment of the present invention, and Figs. 3 and 4 are explanatory views of the cylinder according to the present invention. A vertical cross-sectional view of main parts, an explanatory plan view, and FIG. 5 showing other embodiments show the present invention. FIG. 4 is an explanatory plan view similar to FIG. 4 showing one example; ...Intake port for high load, 8...Combustion chamber, 10...
・Intake port for low load, Jl...Intake port for high load. Patent applicant Toyo Kogyo Co., Ltd. Agent Patent attorney Ao 1 (1 Ao and 2 others Fig. 1 Fig. 2 Fig. 3)
Claims (1)
負荷用吸気ポートとし、他方の吸気ポートを高負荷用吸
気ポートとじ、これら低負荷用、高負荷用吸気ポートを
シリンダ中心に対し相反する方向にオフセントさせて設
定したエンジンにおいて、」−記低負荷用吸気ポートを
、燃焼室側聞１］部近傍における吸気流の中心線とシリ
ンダヘッドデツキ面との交角が高負荷用吸気ポートのそ
れよりも小さくなるように傾斜させたことを特徴とする
エンジンの吸気装置。(]) Equipped with a pair of intake ports, one intake port is used as a low-load intake port, and the other intake port is used as a high-load intake port, and these intake ports for low load and high load are opposite to the center of the cylinder. In an engine that is set to be offset in the direction of An engine intake device characterized by being inclined to be smaller than that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57164700A JPS5954732A (en) | 1982-09-20 | 1982-09-20 | Intake apparatus for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57164700A JPS5954732A (en) | 1982-09-20 | 1982-09-20 | Intake apparatus for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5954732A true JPS5954732A (en) | 1984-03-29 |
Family
ID=15798206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57164700A Pending JPS5954732A (en) | 1982-09-20 | 1982-09-20 | Intake apparatus for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5954732A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394845A (en) * | 1991-10-15 | 1995-03-07 | Mazda Motor Corporation | Intake system for engine |
| WO2001016469A1 (en) * | 1999-09-01 | 2001-03-08 | Zalkin, Anthony, Louis | Internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5484128A (en) * | 1977-12-19 | 1979-07-04 | Nissan Motor Co Ltd | Internal combustion engine with two intake passages |
| JPS5484127A (en) * | 1977-12-19 | 1979-07-04 | Nissan Motor Co Ltd | Internal combustion engine with two intake passages |
-
1982
- 1982-09-20 JP JP57164700A patent/JPS5954732A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5484128A (en) * | 1977-12-19 | 1979-07-04 | Nissan Motor Co Ltd | Internal combustion engine with two intake passages |
| JPS5484127A (en) * | 1977-12-19 | 1979-07-04 | Nissan Motor Co Ltd | Internal combustion engine with two intake passages |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394845A (en) * | 1991-10-15 | 1995-03-07 | Mazda Motor Corporation | Intake system for engine |
| WO2001016469A1 (en) * | 1999-09-01 | 2001-03-08 | Zalkin, Anthony, Louis | Internal combustion engine |
| US6615795B2 (en) | 1999-09-01 | 2003-09-09 | Anthony Louis Zalkin | Internal combustion engine |
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