JPS63170550A - Air intake device for engine - Google Patents

Air intake device for engine

Info

Publication number
JPS63170550A
JPS63170550A JP62001926A JP192687A JPS63170550A JP S63170550 A JPS63170550 A JP S63170550A JP 62001926 A JP62001926 A JP 62001926A JP 192687 A JP192687 A JP 192687A JP S63170550 A JPS63170550 A JP S63170550A
Authority
JP
Japan
Prior art keywords
intake pipe
independent intake
passage
surge tank
independent
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.)
Granted
Application number
JP62001926A
Other languages
Japanese (ja)
Other versions
JPH076465B2 (en
Inventor
Taketoku Otsuka
大塚 竹徳
Yasuo Honda
本田 泰夫
Tomohiro Sunada
知宏 砂田
Yasuhiro Kawasako
河迫 泰宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP192687A priority Critical patent/JPH076465B2/en
Priority to US07/141,764 priority patent/US4848280A/en
Publication of JPS63170550A publication Critical patent/JPS63170550A/en
Publication of JPH076465B2 publication Critical patent/JPH076465B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Characterised By The Charging Evacuation (AREA)

Abstract

PURPOSE:To prevent a surge tank from vertically vibrating by forming the cross section of a passage in an independent intake pipe in an elliptical shape with a major axis in a vertical direction at the upper stream end and gradually in a true circular shape toward the down stream. CONSTITUTION:An independent intake pipe 7 is shaped such that it extends to the direction to leave an engine body E from a side surface of the body and turning direction in nearly 180 deg. as it bend upward smoothly, and connected to a side surface of a surge tank 9 at the upper stream end. The passage section of an independent intake pipe 7 is formed in an elliptical shape, whose major axis extends in a vertical direction, on a passage entrance 6a faced to the surge tank 9. Furthermore, said shape becomes a true circular shape from an elliptical shape gradually as going down stream, and is a true circular shape at the bottom flange of an up stream side independent intake pipe 11. The cross section of a passage in a down stream side independent intake pipe 12 is a true circular shape.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明はエンジンの吸気装置の改良に関するものである
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in an intake system for an engine.

(従来技術及びその問題点) エンジンの吸気装置のなかには、エンジン本体の一側面
に接続された独立吸気管の形状を、エンジン本体の一側
面から遠のく方向に延びつつ上方に向けて滑らかに湾曲
させるようにしたものがある(実開昭59−16556
2号公報参照)。
(Prior art and its problems) Some engine intake devices have an independent intake pipe connected to one side of the engine body that extends away from the one side of the engine body and smoothly curves upward. There is something that looks like this
(See Publication No. 2).

この種の吸気装置にあって□は、独立吸気管が、その上
流端側に取付けられるサージタンク、スロットルボディ
等の重量物を支える関係となるため、この独立吸気管に
対してサージタンク等の振動防止対策を施すことが望ま
しい、特に、例えば吸気の動的効果を得るために長い独
立吸気管を備えたものでは、独立吸気管を略180度反
転する湾曲形状として、その上流端をサージタンクの一
側面に接続するようにされているため、上記振動防止対
策に対する要請が大きい。
In this type of intake system, the independent intake pipe supports heavy objects such as the surge tank and throttle body installed at the upstream end of the independent intake pipe. It is desirable to take anti-vibration measures.In particular, for example, in a model equipped with a long independent intake pipe in order to obtain a dynamic effect of intake air, the independent intake pipe is curved by approximately 180 degrees, and its upstream end is connected to a surge tank. Since the device is connected to one side of the device, there is a strong demand for the above-mentioned vibration prevention measures.

これに対し、勿論、独立吸気管の肉厚を大きくすること
により、剛性tの面から振動防止対策を施すことは可能
であるが、軽量化の面から好ましくない。
On the other hand, it is of course possible to take measures to prevent vibration from the viewpoint of rigidity t by increasing the wall thickness of the independent intake pipe, but this is not preferable from the viewpoint of weight reduction.

そこで、本発明は、エンジン本体の一側面に接続された
独立吸気管が、エンジン本体の一側面から遠のく方向に
延びつつ上方に向けて滑らp)に湾曲することにより略
180度反転する形状とされて、該独立吸気管の上流端
をサージタンクの一側面に接続するようにされたエンジ
ンの吸気装置を前提として、独立吸気管の軽量化に対す
る要請を阻害することなく、サージタンク等の上下振動
防止対策を施すようにしたエンジンの吸気装置を提供す
ることにある。
Therefore, the present invention has a shape in which the independent intake pipe connected to one side of the engine body extends in a direction away from the one side of the engine body and is smoothly curved upward in a direction p), thereby inverting approximately 180 degrees. Assuming an engine intake system in which the upstream end of the independent intake pipe is connected to one side of the surge tank, the upper and lower ends of the surge tank, etc. An object of the present invention is to provide an engine intake device that takes vibration prevention measures.

(問題点を解決するための手段、作用)本発明は独立吸
気管の通路断面に着目し、先ず独立吸気管の上流端にお
ける通路断面形状を上下方向の長軸を備えた楕円形状と
し、この上流端から下流側に向うに従って、徐々に真円
形状となるように構成しである。
(Means and effects for solving the problem) The present invention focuses on the passage cross section of the independent intake pipe, and first, the passage cross section at the upstream end of the independent intake pipe is made into an elliptical shape with a long axis in the vertical direction. It is configured to gradually become a perfect circle from the upstream end toward the downstream side.

このような構成とすることにより、独立吸気管の上流端
部では、上下に長い管壁を備えることとなり、この上下
方向に延びる管壁によって、サージタンク等の上下振動
が抑えられることとなる。
With such a configuration, the upstream end of the independent intake pipe is provided with a vertically long pipe wall, and vertical vibrations of the surge tank and the like are suppressed by the vertically extending pipe wall.

これに加えて独立吸気管の上流端、つまりサージタンク
内の吸気拡大室に臨む吸気入口が実断面積の大きな楕円
であるため、独立吸気管内に入る吸気の入口抵抗が低減
される。また、独立吸気管の途中からは通路断面が真円
形状となるため、独立吸気管の横方向の張り出し量を増
大することもない。
In addition, since the upstream end of the independent intake pipe, that is, the intake inlet facing the intake expansion chamber in the surge tank, is an ellipse with a large actual cross-sectional area, the entrance resistance of intake air entering the independent intake pipe is reduced. Further, since the cross section of the passage becomes a perfect circle from the middle of the independent intake pipe, there is no need to increase the amount of lateral protrusion of the independent intake pipe.

(実施例) 第1図、第2図において、Eはエンジン本体で、エンジ
ン本体Eは4つの気筒1〜4が直列に配置された直列4
気筒型とされている。このエンジン本体Eに対する吸気
系は、シリンダヘッド5側から順に、個々独立した吸気
通路6を形成する独立吸気管7、吸気通路に吸気拡大室
8を形成するサージタンク9、スロットルバルブ(図示
省略)が内蔵されたスロットルボディlO等を接続する
ことにより構成され、上記独立吸気管7は、その下流端
がエンジン本体Eの一側面、より具体的にはシリンダヘ
ッド5の一側面5aに接続され、この各気筒1〜4に連
なる独立吸気管7の形状は、エンジン本体Eの一側面か
ら遠のく方向に延び、滑らかに上方に向けて湾曲しつつ
略180度反転する形状とされて、独立吸気管7の上流
端がサージタンク9の一側面に接続するようにされ、こ
れにより吸気系のコンパクト化が図られている。尚、本
実施例では、上記独立吸気管7が途中で分割され、上流
側独立吸気管11と下流側独立吸気管12とを接続する
ことにより構成されているが、機能的には、上流側独立
吸気管11と下流側独立吸気管12とを一体に形成した
ものと同様であるので、以下の説明では、特に明記しな
い限り、独立吸気管7で両者11,12を総称すること
とする。
(Example) In FIGS. 1 and 2, E is an engine body, and the engine body E is an inline 4 cylinder in which four cylinders 1 to 4 are arranged in series.
It is said to be cylinder-shaped. The intake system for this engine body E includes, in order from the cylinder head 5 side, an independent intake pipe 7 that forms an individual intake passage 6, a surge tank 9 that forms an intake expansion chamber 8 in the intake passage, and a throttle valve (not shown). The independent intake pipe 7 has its downstream end connected to one side surface of the engine body E, more specifically, one side surface 5a of the cylinder head 5, The shape of the independent intake pipe 7 connected to each cylinder 1 to 4 is such that it extends in a direction away from one side of the engine body E, curves smoothly upward, and is inverted approximately 180 degrees. The upstream end of the pump 7 is connected to one side of the surge tank 9, thereby making the intake system more compact. In this embodiment, the independent intake pipe 7 is divided in the middle, and the upstream independent intake pipe 11 and the downstream independent intake pipe 12 are connected. This is similar to the case where the independent intake pipe 11 and the downstream independent intake pipe 12 are integrally formed, so in the following description, unless otherwise specified, both 11 and 12 will be collectively referred to as the independent intake pipe 7.

前記独立吸気管7のうち、エンジン本体Eの一端側、他
端側に位置する独立吸気管7、すなわち、1番気筒1と
4番気筒4とに接続された独立吸気管7には、その湾曲
形状内側7aにボス部13が形成され、このボス部13
には、エンジン本体Eと並列に配置されたツユエルデリ
バリパイプ14が取付けられて、ツユエルデリバリパイ
プ14を介して燃料噴射弁15が装着されている。すな
わち、各独立吸気管7の下流端部には噴口取付孔16が
形成されており、燃料噴射弁15は、噴口取付孔16と
ツユエルデリバリパイプ14とで固定されるようになっ
ている(第1図参照)。
Among the independent intake pipes 7, the independent intake pipes 7 located at one end side and the other end side of the engine main body E, that is, the independent intake pipes 7 connected to the first cylinder 1 and the fourth cylinder 4, include the following: A boss portion 13 is formed on the curved inner side 7a, and this boss portion 13
A fuel injection valve 15 is attached to the engine body E, and a fuel injection valve 15 is attached thereto via the fuel delivery pipe 14, which is arranged in parallel with the engine body E. That is, a nozzle mounting hole 16 is formed at the downstream end of each independent intake pipe 7, and the fuel injection valve 15 is fixed by the nozzle mounting hole 16 and the tsuyuel delivery pipe 14 ( (See Figure 1).

ナリブ20が設けられ、一方外側7bにはアウタリプ2
1が設けられている。これらリブ20.21のうち、イ
ンナリブ20について詳しく説明すると、°インナリブ
20は、その上流側端部がサージタンク9に連続され、
−劣下流側端は、下流側独立吸気管12の途中まで延び
るものとされている。そして、ボス部13が設けられて
いる独立吸気管7においては、インナリブ20の下流側
端部20aがボス部13に連続するようにされて、この
インナリブ20と、ボス部13、ツユエルデリバリパイ
プ14とを経て燃料噴射弁15とで補強構造が形成され
ている。
An outer lip 20 is provided on the outer side 7b.
1 is provided. Of these ribs 20.21, the inner rib 20 will be explained in detail. The inner rib 20 has an upstream end connected to the surge tank 9,
- The inferior downstream end extends halfway down the downstream independent intake pipe 12. In the independent intake pipe 7 in which the boss part 13 is provided, the downstream end 20a of the inner rib 20 is continuous with the boss part 13, and the inner rib 20, the boss part 13, and the tsuyuel delivery pipe A reinforcing structure is formed by the fuel injection valve 15 via the fuel injection valve 14.

次に、前述した独立吸気管7の通路断面形状について説
明すると、第3図乃至第5図に示すように、独立吸気通
路6の上流端、つまり上記吸気拡大室8に臨む通路入口
6aが楕円形状とされ、その長軸文は上下方向に延びる
ものとされている(第1図、第3図参照)、一方、独立
吸気管7の途中、具体的には上流側独立吸気管11の下
端フランジ部11aにおいては真円の通路形状とされ(
第5図参照)、上記楕円形状の通路入口6aとの間は、
下流側に向うに従って徐々に楕円形状から真円形状とな
るようにされている(第4図参照)、そして、独立吸気
管7の下流部分、つまり下流側独立吸気管12内の通路
断面は真円形状とされて、吸気ボート5bに臨むものと
されている。
Next, to explain the passage cross-sectional shape of the independent intake pipe 7 mentioned above, as shown in FIGS. The long axis extends in the vertical direction (see Figures 1 and 3), while the middle of the independent intake pipe 7, specifically the lower end of the upstream independent intake pipe 11. The flange portion 11a has a perfect circular passage shape (
(see Figure 5), and the elliptical passage entrance 6a,
The shape gradually changes from an ellipse to a perfect circle as it goes downstream (see Fig. 4), and the cross section of the passage in the downstream portion of the independent intake pipe 7, that is, the downstream independent intake pipe 12, is a true circle. It has a circular shape and faces the intake boat 5b.

このように、独立吸気通路6の上流端が上下方向に延び
る長軸を備えた楕円の通路断面とされているため、独立
吸気管7の上流端部では、上下に長い管壁11bを備え
ることとなり、この管壁llbによって、サージタンク
9、スロットルボディlOの上下振動(第1図中、矢印
X方向の振動)が抑えられることとなる。これに加えて
独立吸気管7の上流端、つまり吸気拡大室8に臨む吸気
入口6aが実断面積の大きな楕円であるため、独立吸気
管7内に入る吸気の入口抵抗が低減される。また、独立
吸気管7の途中からは通路断面が真円形状となるため、
独立吸気管の張出し量Yを増大することもない。
As described above, since the upstream end of the independent intake passage 6 has an elliptical passage cross section with a long axis extending in the vertical direction, the upstream end of the independent intake pipe 7 is provided with a vertically long pipe wall 11b. Therefore, vertical vibration (vibration in the direction of arrow X in FIG. 1) of the surge tank 9 and the throttle body 10 is suppressed by this tube wall llb. In addition, since the upstream end of the independent intake pipe 7, that is, the intake inlet 6a facing the intake expansion chamber 8, is an ellipse with a large actual cross-sectional area, the entrance resistance of intake air entering the independent intake pipe 7 is reduced. In addition, since the passage cross section becomes a perfect circle from the middle of the independent intake pipe 7,
There is no need to increase the protruding amount Y of the independent intake pipe.

(発明の効果) 以上の説明から明らかなように、本発明によれば、略1
80度反転形状とされた独立吸気管内の通路断面形状に
よって、サージタンク等の振動を抑えることができるた
め、特に独立吸気管の重量が増大することもない、加え
て、サージタンクの吸気拡大室から独立吸気管内に入る
吸気の入口抵抗が低減されるという利点の他に、このよ
うな通路断面形状を採用したとしても、独立吸気管の横
方向の張り出し量が特に増大することもない、というコ
ンパクト性での利点もある。
(Effect of the invention) As is clear from the above explanation, according to the present invention, approximately 1
The cross-sectional shape of the passage in the independent intake pipe, which is inverted 80 degrees, can suppress vibrations in the surge tank, etc., so there is no particular increase in the weight of the independent intake pipe.In addition, the intake expansion chamber of the surge tank In addition to the advantage of reducing the entrance resistance of the intake air entering the independent intake pipe, even if such a passage cross-sectional shape is adopted, the amount of lateral protrusion of the independent intake pipe does not particularly increase. It also has the advantage of compactness.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は実施例の側面図、 第2図は実施例の正面図、 第3図は第1図に示すO−■線断面図、第4図は第1図
に示すO−mV線断面図。 第5図は第1図に示すv−v線断面図である。 E:エンジン本体 6:独立吸気通路 6a:独立吸気通路の通路入口 ア:独立吸気管 9:サージタンク 10:スロットルボディ
Fig. 1 is a side view of the embodiment, Fig. 2 is a front view of the embodiment, Fig. 3 is a sectional view taken along the O-■ line shown in Fig. 1, and Fig. 4 is a sectional view taken along the O-mV line shown in Fig. 1. figure. FIG. 5 is a sectional view taken along the line v--v shown in FIG. 1. E: Engine body 6: Independent intake passage 6a: Passage entrance of independent intake passage A: Independent intake pipe 9: Surge tank 10: Throttle body

Claims (1)

【特許請求の範囲】[Claims] (1)エンジン本体の一側面に接続された独立吸気管が
、エンジン本体の一側面から遠のく方向に延びつつ上方
に向けて滑らかに湾曲することにより略180度反転す
る形状とされて、該独立吸気管の上流端をサージタンク
の一側面に接続するようにされたエンジンの吸気装置に
おいて、 前記独立吸気管内の通路断面が、その上流端では上下方
向の長軸を備えた楕円形状とされ、下流に向かうに従っ
て徐々に真円形状とされている、 ことを特徴とするエンジンの吸気装置。
(1) The independent intake pipe connected to one side of the engine body extends away from the one side of the engine body and smoothly curves upward, so that the independent intake pipe is inverted approximately 180 degrees. In an engine intake system in which an upstream end of an intake pipe is connected to one side of a surge tank, a passage cross section in the independent intake pipe has an elliptical shape with a long axis in the vertical direction at the upstream end, An engine intake device characterized in that the shape gradually becomes a perfect circle as it goes downstream.
JP192687A 1987-01-09 1987-01-09 Engine intake system Expired - Fee Related JPH076465B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP192687A JPH076465B2 (en) 1987-01-09 1987-01-09 Engine intake system
US07/141,764 US4848280A (en) 1987-01-09 1988-01-11 Intake apparatus for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP192687A JPH076465B2 (en) 1987-01-09 1987-01-09 Engine intake system

Publications (2)

Publication Number Publication Date
JPS63170550A true JPS63170550A (en) 1988-07-14
JPH076465B2 JPH076465B2 (en) 1995-01-30

Family

ID=11515203

Family Applications (1)

Application Number Title Priority Date Filing Date
JP192687A Expired - Fee Related JPH076465B2 (en) 1987-01-09 1987-01-09 Engine intake system

Country Status (1)

Country Link
JP (1) JPH076465B2 (en)

Also Published As

Publication number Publication date
JPH076465B2 (en) 1995-01-30

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