JPH0613850B2 - Engine intake system - Google Patents
Engine intake systemInfo
- Publication number
- JPH0613850B2 JPH0613850B2 JP13304684A JP13304684A JPH0613850B2 JP H0613850 B2 JPH0613850 B2 JP H0613850B2 JP 13304684 A JP13304684 A JP 13304684A JP 13304684 A JP13304684 A JP 13304684A JP H0613850 B2 JPH0613850 B2 JP H0613850B2
- Authority
- JP
- Japan
- Prior art keywords
- intake
- box
- engine
- intake pipe
- pipe
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10026—Plenum chambers
- F02M35/10039—Intake ducts situated partly within or on the plenum chamber housing
-
- 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
- F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
- F02B27/005—Oscillating pipes with charging achieved by arrangement, dimensions or shapes of intakes pipes or chambers; Ram air pipes
- F02B27/006—Oscillating pipes with charging achieved by arrangement, dimensions or shapes of intakes pipes or chambers; Ram air pipes of intake runners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10072—Intake runners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/104—Intake manifolds
- F02M35/112—Intake manifolds for engines with cylinders all in one line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
- F02M35/161—Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face
-
- 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)
- Characterised By The Charging Evacuation (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、特に自動車用として用いられる小型エンジン
の吸気装置に関するもので、特にエンジンの燃焼室に連
なる吸気管を改良して高出力を得る装置に関する。Description: TECHNICAL FIELD The present invention relates to an intake system for a small engine, which is used particularly for automobiles, and in particular, an intake pipe connected to a combustion chamber of the engine is improved to obtain a high output. Regarding the device.
従来、特に自動車や自動二輪車用の高出力エンジンで
は、吸気管の長さを比較的長く設定し、吸気の脈動を利
用して、一層出力を向上させる技術が知られている。2. Description of the Related Art Conventionally, in high-power engines for automobiles and motorcycles in particular, there is known a technique in which the length of an intake pipe is set to be relatively long and the pulsation of intake air is used to further improve the output.
しかしながら、この技術を自動車用エンジンに採用せん
としても、比較的狭いエンジン室の空間内に長い吸気管
を収容すること自体が困難な場合がある。また、エンジ
ン室の限られた空間内に無理に長い吸気管を収納させる
と、吸気管に形成される屈曲部の曲率半径を小さくせざ
るを得ず、吸気抵抗が大きくなってしまう。However, even if this technique is not applied to an automobile engine, it may be difficult to accommodate a long intake pipe in a relatively narrow space of an engine room. Further, if a long intake pipe is forcibly housed in the limited space of the engine room, the radius of curvature of the bent portion formed in the intake pipe must be reduced, and the intake resistance increases.
この発明は上記不具合を解消し、狭いエンジン室内に比
較的長い吸気管を吸気抵抗を小さく抑えつつ収納可能に
することを目的とするもので、エンジンの一側から導出
する吸気管をエンジンの上方を通してエンジンの他側へ
延設し、この吸気管を、比較的薄い箱状に形成されかつ
大気に連通された吸気箱に一側から突入させてこの吸気
箱の対向壁面の近傍まで臨ませて開口させると共に、こ
の吸気管における吸気箱内に臨む部分を吸気箱の上壁に
近接させ、前記吸気箱の下璧をカム軸方向に見て中間部
から吸気管突入側とは反対側へ向かうにしたがって下方
へ湾曲させて吸気箱における吸気管開口側となる側部を
幅広に形成し、この側部に大気の吸入口を開口させたも
のである。An object of the present invention is to solve the above-mentioned problems and to make it possible to store a relatively long intake pipe in a narrow engine room while suppressing the intake resistance to a small value. Through to the other side of the engine, and this intake pipe is made to protrude from one side into an intake box that is formed in a relatively thin box shape and is in communication with the atmosphere, and faces the vicinity of the opposing wall surface of this intake box. Along with opening, the part of the intake pipe that faces the inside of the intake box is brought close to the upper wall of the intake box, and the lower wall of the intake box is viewed from the middle part toward the side opposite to the intake pipe rush side when viewed in the cam axis direction. Accordingly, the side portion of the intake box on the side of the intake pipe opening is formed wider by curving downward, and the air intake port is opened at this side portion.
吸気通路の長さはエンジンの一側から他側にかけて比較
的長く設定される。しかも、吸気箱の内部まで吸気管の
一部として利用される。The length of the intake passage is set to be relatively long from one side of the engine to the other side. Moreover, it is used as a part of the intake pipe to the inside of the intake box.
また、エンジンと吸気箱との間において屈曲形成される
吸気管の曲率半径が大きく設定されると共に、この吸気
管の開口部と大気の吸入口とが吸気箱の幅広な同一の側
部に集中する。In addition, the curvature radius of the intake pipe bent between the engine and the intake box is set large, and the opening of this intake pipe and the intake port of the atmosphere are concentrated on the same wide side part of the intake box. To do.
以下、図示の実施例によってこの発明を説明する。１は
４気筒形の４行程ジーゼルエンジンであり、シリンダ
２、シリンダヘッド３およびシリンダ２内へ摺動自在に
嵌合されたピストン４とによって形成される燃焼室５を
有する。６は吸気弁５ａを通して燃焼室５に連結される
吸気通路であり、シリンダヘッド３から吸気管７、吸気
箱８に形成された吸入管９とにより一連に形成される。
実施例のエンジンは１個の気筒毎に２個の吸気弁５ａを
有する多弁形であり、吸気通路６も気筒毎に２個づつ設
けられている。もっとも、吸気箱８の内部は気筒毎に区
画することなく一体的な広い空間としてある。The present invention will be described below with reference to the illustrated embodiments. Reference numeral 1 denotes a four-cylinder four-stroke diesel engine having a combustion chamber 5 formed by a cylinder 2, a cylinder head 3, and a piston 4 slidably fitted in the cylinder 2. An intake passage 6 is connected to the combustion chamber 5 through the intake valve 5a, and is formed in series by the cylinder head 3, the intake pipe 7, and the intake pipe 9 formed in the intake box 8.
The engine of the embodiment is a multi-valve type having two intake valves 5a for each cylinder, and two intake passages 6 are provided for each cylinder. However, the inside of the intake box 8 is an integrated wide space without being divided into cylinders.
吸気箱８は第１図で示すように、気筒方向に沿い、略同
様な断面形状をもって長く形成されており、エンジン室
の上壁をなすエンジンフード１０に当接しないように、
比較的薄い箱状に形成され、エンジン１の一側の上方に
配置されている。吸気箱８の側面には吸入管９が一体的
に設けられ、内側へ突出した位置に開口して内外を連通
させると共に、その外端部にはエンジン１の他側から導
出した吸気管７が、エンジン１の上方を通して延び連結
されている。１１は吸気箱８の下面に開口させた大気の
吸入口であり、図示していないエアクリーナに連通して
いる。１２は鋳造時の中子砂を除去する砂抜き孔であ
り、栓１３が圧入され密封されている。As shown in FIG. 1, the intake box 8 is formed long along the cylinder direction with a substantially similar cross-sectional shape so as not to abut the engine hood 10 forming the upper wall of the engine compartment.
It is formed in a relatively thin box shape and is arranged above one side of the engine 1. An intake pipe 9 is integrally provided on a side surface of the intake box 8, and is opened at a position projecting inward to communicate the inside and outside, and an intake pipe 7 led out from the other side of the engine 1 is provided at an outer end thereof. , Extends through and is connected to the engine 1. Reference numeral 11 denotes an air intake port opened on the lower surface of the intake box 8 and communicates with an air cleaner (not shown). Reference numeral 12 is a sand removing hole for removing core sand during casting, and a plug 13 is press-fitted and sealed.
吸気通路６の大気側端部をなす吸入管９は、軽合金によ
り吸気箱８と一体的に鋳造して成形されており、吸気箱
８の側方から突入され、上璧８ａに沿って対向壁面８ｂ
の近傍に導かれ、そこに形成された比較的広い空間８ｃ
の中央部に開口している。このように吸入管９における
吸気箱８内に臨む部分を吸気箱８の上壁８ａに沿わせる
と、吸気管７と、この吸気管７に接続される吸入管９を
屈曲形成するに当たり、曲率半径を大きく設定すること
ができる。また、吸気箱８の前記比較的広い空間８ｃ
は、第１図に示すように、吸気箱８の下壁をカム軸方向
（第１図の紙面と直交する方向）に見て中央部から吸入
管突入側とは反対側へ向かうにしたがって下方へ湾曲さ
せることによって形成されている。この空間８ｃを形成
する吸気箱８の下壁に前記吸入口１１が配設されてい
る。すなわち、吸気箱８の幅広な同一の側部に吸入管９
の開口部と吸入口１１とが設けられている。The intake pipe 9 forming the end of the intake passage 6 on the atmosphere side is formed by casting integrally with the intake box 8 from a light alloy. The intake pipe 9 is protruded from the side of the intake box 8 and faces the upper wall 8a. Wall 8b
A relatively wide space 8c formed near the
It has an opening in the center of. When the portion of the intake pipe 9 that faces the inside of the intake box 8 is along the upper wall 8a of the intake box 8 as described above, the intake pipe 7 and the intake pipe 9 connected to the intake pipe 7 are bent to form a curvature. The radius can be set large. In addition, the relatively large space 8c of the intake box 8
As shown in FIG. 1, when the lower wall of the intake box 8 is viewed in the cam axis direction (the direction orthogonal to the paper surface of FIG. 1), the lower part of the intake box 8 decreases from the center to the side opposite to the suction pipe entry side. It is formed by bending to. The suction port 11 is arranged on the lower wall of the suction box 8 forming the space 8c. That is, the suction pipe 9 is provided on the same wide side portion of the intake box 8.
And an inlet 11 are provided.
エンジンが始動すると、吸気弁５ａの開閉に伴って燃焼
室５内の吸気負圧の脈動が吸気通路６内へ波及し、大気
は吸入口１１から吸気箱８内へ流入し、比較的大きな容
積を有する吸気箱８の内部で流動の慣性その他に起因す
る不安定な圧力変動を除去する。すなわち、吸気箱８は
いわゆるサージタンクとして機能する。そして、吸気箱
８に流入した大気は、吸入管９の開口部と大気の吸入口
１１が吸気箱８の幅広な一側部に集中している関係から
吸気箱８内から吸入管９へ円滑に流れ込む。吸入管９に
流れ込んだ大気は、吸入管９が吸気箱８の上壁８ａに沿
って設けられており、エンジン１と吸気箱８との間にお
いて屈曲形成される吸気管７，吸入管９の曲率半径が大
きくなっている関係から、大きな吸気抵抗を受けること
なくエンジン１に吸い込まれることになる。かくて、各
気筒の吸気通路６毎に均等に大気が吸入される。When the engine is started, the pulsation of the intake negative pressure in the combustion chamber 5 spreads into the intake passage 6 as the intake valve 5a opens and closes, and the atmosphere flows from the intake port 11 into the intake box 8 and has a relatively large volume. The unstable pressure fluctuation caused by the inertia of the flow or the like is removed inside the intake box 8 having That is, the intake box 8 functions as a so-called surge tank. The atmosphere flowing into the intake box 8 smoothly flows from the inside of the intake box 8 to the intake tube 9 because the opening of the intake tube 9 and the intake port 11 for the atmosphere are concentrated on one wide side portion of the intake box 8. Flow into. The atmosphere flowing into the intake pipe 9 is provided with the intake pipe 9 along the upper wall 8 a of the intake box 8 and the intake pipe 7 and the intake pipe 9 are bent and formed between the engine 1 and the intake box 8. Because of the large radius of curvature, the engine 1 is sucked in without receiving a large intake resistance. Thus, the air is evenly sucked into each intake passage 6 of each cylinder.
また、大気が吸入されるとき、吸気弁５ａから吸気箱８
に形成された吸入管９の開口部までの吸気通路６が、比
較的均一な断面形状と断面積によって形成されているの
で、吸気の流動が円滑であり、しかも、その長さは吸気
の脈動を利用するため必要なだけとることができて、エ
ンジンの低速度から高速度に至るまで、慣性効果や脈動
効果の利用が可能となり、エンジン性能の設定が容易と
なる。In addition, when the atmosphere is inhaled, the intake valve 5a to the intake box 8
The intake passage 6 up to the opening of the intake pipe 9 formed by the above is formed with a relatively uniform cross-sectional shape and cross-sectional area, so that the flow of the intake air is smooth and the length thereof is the pulsation of the intake air. Therefore, the inertial effect and the pulsating effect can be used from low speed to high speed of the engine, and the engine performance can be easily set.
以上説明したように本発明に係るエンジンの吸気装置
は、エンジンの一側から導出する吸気管をエンジンの上
方を通してエンジンの他側へ延設し、この吸気管を、比
較的薄い箱状に形成されかつ大気に連通された吸気箱に
一側から突入させてこの吸気箱の対向壁面の近傍まで臨
ませて開口させると共に、この吸気管における吸気箱内
に臨む部分を吸気箱の上壁に近接させ、前記吸気箱の下
壁をカム軸方向に見て中間部から吸気管突入側とは反対
側へ向かうにしたがって下方へ湾曲させて吸気箱におけ
る吸気管開口側となる側部を幅広に形成し、この側部に
大気の吸入口を開口させたため、吸気通路の長さをエン
ジンの一側から他側にかけて比較的長くすることがで
き、さらに、吸気箱の内部まで吸気管の一部として利用
するから、一層吸気通路を長く設定できる。このため、
エンジンの出力向上など、所望のエンジン性能を得るた
めの設定を容易にすることができる効果がある。As described above, in the intake system for an engine according to the present invention, the intake pipe leading from one side of the engine is extended to the other side of the engine through the upper side of the engine, and the intake pipe is formed in a relatively thin box shape. The air intake box communicated with the atmosphere is rushed from one side to face the vicinity of the opposing wall surface of the air intake box and to be opened. The lower wall of the intake box is curved downward from the middle part toward the side opposite to the intake pipe entry side when viewed in the cam axis direction, and a wide side part is formed on the intake pipe opening side of the intake box. However, because the air intake port is opened on this side, the length of the intake passage can be made relatively long from one side of the engine to the other side, and as a part of the intake pipe to the inside of the intake box. Because it is used, more intake air The can be set long. For this reason,
This has the effect of facilitating settings for obtaining desired engine performance, such as improving engine output.
また、吸気箱内に臨む吸気管を吸気箱の上壁に近接させ
ることによって、エンジンと吸気箱との間において屈曲
形成される吸気管の曲率半径を大きく設定することがで
きる。このため、吸気抵抗を低減できる。Further, by making the intake pipe facing the inside of the intake box close to the upper wall of the intake box, the radius of curvature of the intake pipe bent between the engine and the intake box can be set large. Therefore, the intake resistance can be reduced.
さらに、吸気管を吸気箱内に配置したためにこれが吸気
箱内の吸気の流れの邪魔になることが考えられるが、吸
気管の開口部および大気の吸入口を吸気箱の同一の側部
に集中させると共に、この側部を幅広に形成したので、
大気が吸気箱から吸気管へ円滑に流れる。この点からも
吸気抵抗の低減を図ることができる。Furthermore, since the intake pipe is placed inside the intake box, this may hinder the flow of intake air in the intake box, but the opening of the intake pipe and the air intake port are concentrated on the same side of the intake box. As well as making this side part wide,
The atmosphere smoothly flows from the intake box to the intake pipe. From this point as well, the intake resistance can be reduced.
図面はこの発明の一実施例を示すもので、第１図はエン
ジンの一部を破断した側面図、第２図は平面図、第３図
はそのIII−III断面図である。 ５……燃焼室、５ａ……吸気弁、６……吸気通路、７…
…吸気管、８……吸気箱、８ａ……上壁、８ｂ……対向
壁面、９……吸入管、１１……吸入口。The drawings show an embodiment of the present invention. FIG. 1 is a side view in which a part of an engine is cut away, FIG. 2 is a plan view, and FIG. 3 is a III-III sectional view thereof. 5 ... Combustion chamber, 5a ... Intake valve, 6 ... Intake passage, 7 ...
... intake pipe, 8 ... intake box, 8a ... upper wall, 8b ... opposing wall surface, 9 ... intake pipe, 11 ... intake port.
Claims (3)
ジンの上方を通してエンジンの他側へ延設し、この吸気
管を、比較的薄い箱状に形成されかつ大気に連通された
吸気箱に一側から突入させてこの吸気箱の対向壁面の近
傍まで臨ませて開口させると共に、この吸気管における
吸気箱内に臨む部分を吸気箱の上壁に近接させ、前記吸
気箱の下璧をカム軸方向に見て中間部から吸気管突入側
とは反対側へ向かうにしたがって下方へ湾曲させて吸気
箱における吸気管開口側となる側部を幅広に形成し、こ
の側部に大気の吸入口を開口させたことを特徴とするエ
ンジンの吸気装置。1. An intake pipe extending from one side of the engine is extended to the other side of the engine through the upper side of the engine, and the intake pipe is formed into a relatively thin box-shaped intake box communicating with the atmosphere. The part that faces the inside of the intake box of this intake pipe is brought close to the upper wall of the intake box, and the lower wall of the intake box is cammed. When viewed in the axial direction, the side portion that is the intake pipe opening side of the intake box is formed wider by curving downward as it goes from the intermediate portion to the side opposite to the intake pipe entry side, and the air intake port for this side is formed. The intake device for the engine is characterized by opening the.
筒形であり、シリンダヘッドの吸入口と吸気箱とは、互
いにエンジンの反対側に配置されている特許請求の範囲
第１項記載のエンジンの吸気装置。2. The engine according to claim 1, wherein the engine is a multi-cylinder type having cylinders arranged in series, and the intake port and the intake box of the cylinder head are arranged on opposite sides of the engine. Intake device.
る特許請求の範囲第１項記載のエンジンの吸気装置。3. The intake system for an engine according to claim 1, wherein the intake box and the intake pipe are integrally cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13304684A JPH0613850B2 (en) | 1984-06-29 | 1984-06-29 | Engine intake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13304684A JPH0613850B2 (en) | 1984-06-29 | 1984-06-29 | Engine intake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6114425A JPS6114425A (en) | 1986-01-22 |
| JPH0613850B2 true JPH0613850B2 (en) | 1994-02-23 |
Family
ID=15095542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13304684A Expired - Fee Related JPH0613850B2 (en) | 1984-06-29 | 1984-06-29 | Engine intake system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0613850B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH066194Y2 (en) * | 1984-10-24 | 1994-02-16 | マツダ株式会社 | Engine intake system |
| JPH0232862Y2 (en) * | 1986-01-06 | 1990-09-05 | ||
| EP1722094A3 (en) * | 2002-09-02 | 2010-11-03 | Denso Corporation | Air intake module for engines |
| JP2012128230A (en) * | 2010-12-16 | 2012-07-05 | Yamaha Corp | Noise suppressor for air introduction pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5775158U (en) * | 1980-10-28 | 1982-05-10 | ||
| JPS616260Y2 (en) * | 1980-11-10 | 1986-02-25 |
-
1984
- 1984-06-29 JP JP13304684A patent/JPH0613850B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6114425A (en) | 1986-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |