JPH062626A - Variable intake system of automobile engine - Google Patents

Variable intake system of automobile engine

Info

Publication number
JPH062626A
JPH062626A JP18615492A JP18615492A JPH062626A JP H062626 A JPH062626 A JP H062626A JP 18615492 A JP18615492 A JP 18615492A JP 18615492 A JP18615492 A JP 18615492A JP H062626 A JPH062626 A JP H062626A
Authority
JP
Japan
Prior art keywords
vehicle
passage
collecting
communicating
communication
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
JP18615492A
Other languages
Japanese (ja)
Other versions
JP2842060B2 (en
Inventor
Takeshi Yamagiwa
毅 山極
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP18615492A priority Critical patent/JP2842060B2/en
Priority to US08/070,852 priority patent/US5322038A/en
Publication of JPH062626A publication Critical patent/JPH062626A/en
Application granted granted Critical
Publication of JP2842060B2 publication Critical patent/JP2842060B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To check the setting height of an engine hood by varying the height of a ceiling wall part of each interconnecting passage to be installed side by side in the longitudinal direction of a vehicle stepwise along the engine hood. CONSTITUTION:This variable intake system is provided with plural pieces of collecting parts 15, 16 collecting both branch pipes 13, 14 themselves to be connected to a cylinder group whose firing order is uncontiued, plural pieces of interconnecting passages 21, 22 interconnecting these collecting parts 15, 16, and two control valves 23, 24 opening or closing these interconnecting passages 21, 22 according to driving conditions. In addition, these interconnecting passages 21, 22 are installed side by side in the longitudinal direction of a vehicle, and each height of both ceiling wall parts 21a, 22a of the interconnecting passages 21, 22 is varied stepwise so as to make the rear higher than the front of the vehicle. With this constitution, such a possibility that the setting height of an engine hood might be increased by an intake manifold is checked to the minimum as securing an intake passage area so sufficiently, thus the degree of design freedom in an automobile is expandable.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、自動車用エンジンの可
変吸気装置の改良に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a variable intake system for an automobile engine.

【0002】[0002]

【従来の技術】低速から高速まで幅広い回転域に渡って
吸入効率を維持するために、複数の吸気管集合部を連通
する連通路と、エンジン運転条件に応じてこの連通路を
開閉する制御弁を備えるものがある。
2. Description of the Related Art In order to maintain intake efficiency over a wide range of rotation speeds from low speed to high speed, a communication passage that connects a plurality of intake pipe collecting portions and a control valve that opens and closes the communication passage according to engine operating conditions. Some are equipped with.

【0003】V型6気筒エンジンに備えられる可変吸気
装置として、従来例えば図7、図8に示すものがあった
(特開昭62−153516号公報、特開平3−685
26号公報等、参照)。
As a variable intake system provided in a V-type 6-cylinder engine, there has been a variable intake system shown in FIGS. 7 and 8, for example.
(JP-A-62-153516, JP-A-3-685)
26, etc.).

【0004】これについて説明すると、吸気マニホール
ド80は左右バンク81,82の各気筒に連通する分枝
管83,84を共に左バンク81上に延ばし、各分枝管
83,84を各バンク81,82毎に集合する2つの集
合部(サージタンク)85,86を共に左バンク81上
に設けている。
Explaining this, in the intake manifold 80, branch pipes 83 and 84 which communicate with the cylinders of the left and right banks 81 and 82 are extended together on the left bank 81, and the branch pipes 83 and 84 are respectively connected to the banks 81 and 82. Two collecting parts (surge tanks) 85 and 86 that collect every 82 are both provided on the left bank 81.

【0005】各集合部85,86をクランクシャフトと
平行方向に配置し、各集合部85,86をそれぞれの中
央部で連通する連通管87と、各集合部85,86をそ
れぞれの後端で連通する連通管88を備え、各連通管8
7,88の途中に介装された各制御弁89,90を運転
条件に応じて開閉することにより、吸気の脈動エネルギ
ーを利用して吸入効率を高めるようになっている。
The collecting portions 85 and 86 are arranged in parallel with the crankshaft, and a communicating pipe 87 that connects the collecting portions 85 and 86 at their central portions, and the collecting portions 85 and 86 at their rear ends. Each communication pipe 8 is provided with a communication pipe 88 communicating with each other.
By opening / closing each control valve 89, 90 interposed in the middle of 7, 88 according to the operating condition, the pulsation energy of the intake air is utilized to enhance the intake efficiency.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の吸気マニホールド80にあっては、一方の集
合部85の上方に他方の集合部86および連通管87が
配置されているため、この集合部86および連通管87
がエンジンの全高を増大させ、エンジンルームを画成す
るエンジンフード91の取付け位置が高くなるという問
題点があった。
However, in such a conventional intake manifold 80, since the other collecting portion 86 and the communicating pipe 87 are arranged above the one collecting portion 85, the other collecting portion 86 is arranged. Part 86 and communication pipe 87
However, there is a problem in that the total height of the engine is increased and the mounting position of the engine hood 91 that defines the engine room is increased.

【0007】本発明は上記の問題点に着目し、エンジン
フードの取付け高さを抑えられる可変吸気装置を提供す
ることを目的とする。
In view of the above problems, it is an object of the present invention to provide a variable intake system which can suppress the mounting height of the engine hood.

【0008】[0008]

【課題を解決するための手段】本発明は、点火順序の連
続しない気筒群に連通する分枝管どうしを集合させる複
数の集合部と、各集合部を連通する複数の連通路と、各
連通路を運転条件に応じて開閉する制御弁とを備える自
動車用エンジンの可変吸気装置において、前記各連通路
を車両の前後方向に並んで設け、各連通路の天井壁部の
高さを車両前方より後方が高くなるように段階的に変化
させる。
SUMMARY OF THE INVENTION According to the present invention, a plurality of gathering portions for gathering branch pipes communicating with a cylinder group having a non-continuous ignition order, a plurality of communicating passages for communicating the gathering portions, and a plurality of communicating passages for communicating with each other. A variable intake system for an automobile engine, comprising: a control valve that opens and closes a passage in accordance with operating conditions, wherein the communication passages are arranged side by side in a front-rear direction of the vehicle, and a height of a ceiling wall portion of each communication passage is set in front of the vehicle. Change gradually so that the rear is higher.

【0009】また、各気筒群をV型に対向する左右バン
クに配列し、このバンクが車両の前後方向に延びるよう
に縦置きし、各集合部を左右バンクの上方に配置すると
ともに、各連通路を各集合部の上方に配置する。
Further, each cylinder group is arranged in left and right banks which are opposed to each other in a V-type, and the banks are vertically arranged so as to extend in the front-rear direction of the vehicle. A passage is located above each collection.

【0010】[0010]

【作用】車両の前後方向に並んで設けられる各連通路の
天井壁部の高さをエンジンフードに沿って段階的に変化
させることができ、連通路の通路面積を十分に確保しつ
つ、エンジンフードの取付け高さが吸気マニホールドに
よって増大することを抑えられる。
The height of the ceiling wall portion of each communication passage provided side by side in the front-rear direction of the vehicle can be changed stepwise along the engine hood, and the passage area of the communication passage can be sufficiently secured while the engine is being engineered. It is possible to prevent the mounting height of the hood from increasing due to the intake manifold.

【0011】また、V型エンジンを縦置きに搭載した車
両において、各集合部を左右バンクの上方に配置すると
ともに、各連通路を各集合部の上方に配置したため、エ
ンジンフードの取付け高さを抑えつつ、各連通路を画成
する連通管を吸気マニホールドにオーバハングして取付
ける構造に比べて連通管の支持剛性を十分に確保して、
連通管の振動を抑制することができる。
Further, in a vehicle in which a V-type engine is mounted vertically, each collecting portion is arranged above the left and right banks, and each communicating passage is arranged above each collecting portion, so that the mounting height of the engine hood is increased. While suppressing, the communication pipe that defines each communication passage is sufficiently hung to support the communication pipe compared to the structure in which it overhangs and is attached to the intake manifold.
Vibration of the communication pipe can be suppressed.

【0012】[0012]

【実施例】以下、本発明の実施例を添付図面に基づいて
説明する。
Embodiments of the present invention will be described below with reference to the accompanying drawings.

【0013】図2に示すように、V型6気筒エンジンは
シリンダブロック1の上部に左右シリンダヘッド2,3
が設けられ、この左右シリンダヘッド2,3の内側に吸
気マニホールド6が接続され、外側に図示しない排気管
が接続されている。なお、左右のバンクには点火順序の
連続しない気筒どうしが集められている。
As shown in FIG. 2, the V-type 6-cylinder engine has left and right cylinder heads 2 and 3 on top of a cylinder block 1.
The intake manifold 6 is connected to the inside of the left and right cylinder heads 2 and 3, and an exhaust pipe (not shown) is connected to the outside. It should be noted that cylinders whose ignition order is not continuous are collected in the left and right banks.

【0014】吸気マニホールド6は左右シリンダヘッド
2,3に接続されるロアマニホールド11と、このロア
マニホールド11の上部に接続されるアッパーマニホー
ルド12とに分割して形成される。このアッパーマニホ
ールド12は左右のロッカーカバー4,5上で水平方向
に延び、左右シリンダヘッド2,3の各吸気ポートに連
通する分岐路をもつロアマニホールド11に接続する分
枝管13,14と、各分枝管13,14を集合する2つ
の集合部15,16と、各集合部15,16に図示しな
いスロットルバルブからの吸気を導く2つの導入管1
7,18とを有し、これらが一体形成されている。
The intake manifold 6 is divided into a lower manifold 11 connected to the left and right cylinder heads 2 and 3, and an upper manifold 12 connected to the upper part of the lower manifold 11. The upper manifold 12 extends in the horizontal direction on the left and right rocker covers 4 and 5, and branch pipes 13 and 14 connected to the lower manifold 11 having a branch passage communicating with the intake ports of the left and right cylinder heads 2 and 3, Two collecting parts 15 and 16 for collecting the branch pipes 13 and 14, and two introducing pipes 1 for guiding intake air from a throttle valve (not shown) to each collecting part 15 and 16.
7 and 18, which are integrally formed.

【0015】平面図(図3)上において、各分枝管1
3,14のうち中央に配置されるものの中心線O4,O3
は図示しないクランクシャフトと直交する方向に直線状
に延びる一方、各分枝管13,14のうち前後端に配置
されるものの中心線O1,O2,O5,O6は各集合部1
5,16に向けて途中から折れ曲がり、各中心線O3
4の延長上の各点C1,C2に交わる。すなわち、各中
心線O2,O4,O6は点C1で交わり、各中心線O1
3,O5は点C2で交わっている。
In the plan view (FIG. 3), each branch pipe 1
The center lines O 4 and O 3 of the ones arranged at the center among the three and four
Is linearly extended in a direction orthogonal to the crankshaft (not shown), while center lines O 1 , O 2 , O 5 , O 6 of the branch pipes 13 and 14 arranged at the front and rear ends are arranged in the collecting portion 1 respectively.
Bent from the middle toward 5, 16 and each center line O 3 ,
It intersects with each point C 1 and C 2 on the extension of O 4 . That is, the center lines O 2 , O 4 , and O 6 intersect at the point C 1 , and the center lines O 1 and O 4 ,
O 3 and O 5 intersect at a point C 2 .

【0016】したがって、アッパーマニホールド12の
各分枝管13,14のうち前後端に配置されるものは、
互いに並列に交差する各並列部13a,14aと、この
各並列部13a,14aから各分枝管13,14のうち
中央に配置されるものに向けて折れ曲がる各傾斜部13
b,14bとを有する。
Therefore, among the branch pipes 13 and 14 of the upper manifold 12, those arranged at the front and rear ends are
The parallel portions 13a and 14a that intersect each other in parallel, and the inclined portions 13 that are bent from the parallel portions 13a and 14a toward the branch pipes 13 and 14 arranged in the center.
b, 14b.

【0017】各導入管17,18は各集合部15,16
からクランクシャフトと直交する方向に延びる直交部1
7a,18aと、各直交部17a,18aから折れ曲が
ってクランクシャフトと平行方向に延びる平行部17
b,18bとを有している。
The introduction pipes 17 and 18 are connected to the collecting portions 15 and 16 respectively.
Orthogonal part 1 extending in the direction orthogonal to the crankshaft from the
7a, 18a and the parallel portion 17 that is bent from the orthogonal portions 17a, 18a and extends in the direction parallel to the crankshaft.
b, 18b.

【0018】アッパーマニホールド12は左右のロッカ
ーカバー4,5上で水平方向に延びており、正面図(図
2)上において、各集合部16,15は左右バンクの各
気筒中心線A2,A3より内側で、かつ各導入管18,1
7の平行部18b,17bは各気筒中心線A2,A3より
外側に配置される。
The upper manifold 12 extends horizontally on the left and right rocker covers 4 and 5, and in the front view (FIG. 2), the collecting portions 16 and 15 are center lines A 2 and A of the cylinders of the left and right banks. Inside of 3 , and each introduction pipe 18,1
The parallel portions 18b and 17b of 7 are arranged outside the center lines A 2 and A 3 of the cylinders.

【0019】各導入管17,18の端部には図示しない
スロットルチャンバーに対する接合フランジ17c,1
8cが形成される。この接合フランジ17c,18cは
所定角度だけ下方に向けて傾斜して形成され、これに接
続されるスロットルチャンバーの取付け高さを低く抑え
ている。
At the ends of the introduction pipes 17 and 18, joint flanges 17c and 1 to a throttle chamber (not shown) are provided.
8c is formed. The joint flanges 17c and 18c are formed so as to be inclined downward by a predetermined angle, and the mounting height of the throttle chamber connected thereto is kept low.

【0020】各集合部15,16は各分枝管13,14
と各導入管17,18の間に画成されるサージタンクと
してクランクシャフトと平行方向に延びる一方、吸気マ
ニホールド6は左右集合部15,16を連通する偏平な
連通管20を各分枝管13,14の上方に備える。
The collecting parts 15 and 16 are respectively connected to the branch pipes 13 and 14.
While extending in a direction parallel to the crankshaft as a surge tank defined between the intake pipe 6 and the respective introduction pipes 17 and 18, the intake manifold 6 includes a flat communication pipe 20 that communicates the left and right collecting portions 15 and 16 with each branch pipe 13. , 14 above.

【0021】図4のように、連通管20は、各接合フラ
ンジ35,36の前後端にボルト穴37が形成され、各
ボルト穴37に挿通する図示しないボルトをアッパーマ
ニホールド12に螺合させることにより締結される。連
通管20とアッパーマニホールド12との接続部間には
図示しないシール材が介装され、このシール材としては
ガスケットまたはOリング等が用いられる。
As shown in FIG. 4, the communicating pipe 20 has bolt holes 37 formed at the front and rear ends of the joint flanges 35 and 36, and bolts (not shown) inserted into the bolt holes 37 are screwed into the upper manifold 12. It is concluded by. A seal material (not shown) is interposed between the connecting portion between the communication pipe 20 and the upper manifold 12, and a gasket, an O-ring, or the like is used as the seal material.

【0022】各集合部15,16の上壁部には長円形の
開口部31,32が形成される一方、連通管20には各
開口部31,32と重なり合う同形の開口部33,34
が形成される。各開口部31,32はクランクシャフト
と平行方向に延び、それぞれの開口縁部は平面図(図
3)上において各分枝管13,14のうち前後端に位置
するものの中心線O1,O2,O5,O6より外側に配置さ
れ、これにより各集合部15,16に対する連通管20
の開口面積が十分に確保されている。
Oval circular openings 31 and 32 are formed in the upper wall portions of the collecting portions 15 and 16, while the communication pipe 20 has openings 33 and 34 of the same shape which overlap the opening portions 31 and 32.
Is formed. The openings 31 and 32 extend in the direction parallel to the crankshaft, and the opening edges are the center lines O 1 and O of the branch pipes 13 and 14 located at the front and rear ends in the plan view (FIG. 3). 2 , O 5 , O 6 are arranged outside, so that the connecting pipes 20 for the collecting portions 15, 16 are provided.
The opening area of is sufficiently secured.

【0023】連通管20は各開口部33,34の周囲に
各集合部15,16に対する接合フランジ35,36が
形成される。平面図(図1)上において、各接合フラン
ジ35,36は、前後端に位置する各分枝管13,14
の管壁(各集合部15,16の端壁部)13c,14c
より内側に配置される。
The connecting pipe 20 has joint flanges 35 and 36 formed around the openings 33 and 34 for the collecting portions 15 and 16, respectively. In the plan view (FIG. 1), the joint flanges 35 and 36 are located at the front and rear ends of the branch pipes 13 and 14, respectively.
Pipe walls (end wall portions of the collecting portions 15 and 16) 13c and 14c
It is placed inside.

【0024】図4にも示すように、連通管20は偏平な
箱形をしており、その内部に開口断面積の異なる第一連
通路21と第二連通路22が仕切り壁27によって画成
される。各連通路21,22の断面形状は略矩形をし
て、大小異なる大きさで形成される。
As shown in FIG. 4, the communication pipe 20 has a flat box shape, and a partition wall 27 defines a first series passage 21 and a second communication passage 22 having different opening cross-sectional areas therein. To be done. Each of the communication passages 21 and 22 has a substantially rectangular cross-sectional shape, and is formed in different sizes.

【0025】各連通路21,22にはバタフライ式の第
一、第二制御弁23,24がそれぞれ介装される。各制
御弁23,24は矩形の各弁体23a,24aと、各弁
体23a,24aを回動可能に支持する弁軸23b,2
4bを備え、各弁軸23b,24bに連結したアクチュ
エータ25,26を介して開閉作動する。各弁軸23
b,24bは連通管20から突出した端部に各リンクプ
レート39,40がそれぞれ連結され、各リンクプレー
ト39,40にアクチュエータ25,26のロッド25
a,26aが連結される。各アクチュエータ25,26
は運転条件に応じて各制御弁23,24を開閉作動させ
て、連通管20の通路面積を段階的に変化させ、吸気の
脈動エネルギーを利用して吸入効率を高めるようになっ
ている。
Butterfly type first and second control valves 23 and 24 are provided in the communication passages 21 and 22, respectively. The control valves 23 and 24 are rectangular valve bodies 23a and 24a, and valve shafts 23b and 2 that rotatably support the valve bodies 23a and 24a.
4b and is opened and closed via actuators 25 and 26 connected to the valve shafts 23b and 24b. Each valve shaft 23
Link plates 39 and 40 are connected to the ends of b and 24b protruding from the communication pipe 20, and the rods 25 of the actuators 25 and 26 are connected to the link plates 39 and 40, respectively.
a and 26a are connected. Each actuator 25, 26
In accordance with operating conditions, the control valves 23 and 24 are opened / closed to gradually change the passage area of the communication pipe 20, and the pulsation energy of the intake air is used to increase the intake efficiency.

【0026】仕切り壁27には各制御弁23,24の弁
軸23b,24bの一端を嵌合させる第一、第二軸受け
穴8,9が形成される。各軸受け穴8,9は仕切り壁2
7を貫通して形成され、各弁軸23b,24bの一端が
回転自在に嵌合する。各軸受け穴8,9は上下方向にオ
フセットされるとともに、クランクシャフトと直交方向
(左右方向)にオフセットして設けられ、各弁軸23
b,24bが互いに干渉することを避けるようになって
いる。
The partition wall 27 is formed with first and second bearing holes 8 and 9 into which one ends of the valve shafts 23b and 24b of the control valves 23 and 24 are fitted. Each bearing hole 8 and 9 is a partition wall 2.
7 is formed so that one end of each valve shaft 23b, 24b is rotatably fitted. The bearing holes 8 and 9 are offset in the vertical direction and offset in the direction orthogonal to the crankshaft (left-right direction).
b and 24b are prevented from interfering with each other.

【0027】図1において、10は車両のエンジンフー
ドであり、19はフロントフェンダ、29はシリンダブ
ロック1の下部に備えられるオイルパン、30はエンジ
ン後部に連結されるトランスミッションである。エンジ
ンはクランクシャフトが車両の前後方向に延びるように
縦置きに搭載されている。
In FIG. 1, 10 is an engine hood of a vehicle, 19 is a front fender, 29 is an oil pan provided under the cylinder block 1, and 30 is a transmission connected to the rear of the engine. The engine is mounted vertically so that the crankshaft extends in the front-rear direction of the vehicle.

【0028】エンジンフード10は車両後方から前方に
かけて下方にかけて低く傾斜して配置されるのに対し、
第一連通路21を画成する第一天井壁部21aは、第二
連通路22を画成する第二天井壁部22aより低く形成
され、第一天井壁部21aと第二天井壁部22aの間に
は段差28が形成されている。これにより、吸気マニホ
ールド6の高さが第二天井壁部22aから第一天井壁部
21aへと段階的に減少し、エンジンフード10に対し
て所定の間隙を持たせている。
While the engine hood 10 is arranged so as to incline downward from the rear of the vehicle to the front thereof,
The first ceiling wall portion 21a that defines the first series passage 21 is formed lower than the second ceiling wall portion 22a that defines the second communication passage 22, and the first ceiling wall portion 21a and the second ceiling wall portion 22a. A step 28 is formed between them. As a result, the height of the intake manifold 6 is gradually reduced from the second ceiling wall portion 22a to the first ceiling wall portion 21a, and the engine hood 10 is provided with a predetermined gap.

【0029】次に、作用について説明する。Next, the operation will be described.

【0030】図示しないエアクリーナから取り入れられ
た吸気は各スロットルチャンバーから各導入管17,1
8を通って各集合部15,16に送り込まれた後、各分
枝管13,14を通して順に吸入行程を迎える気筒へと
吸入される。所定の低回転域では各制御弁23,24が
共に閉弁して各集合部15,16の連通を断つことによ
り、吸気の脈動エネルギーを利用して共鳴過給を行い、
所定の中回転域では各制御弁23,24のいずれか一方
のみが選択的に開弁し、所定の高回転域では各制御弁2
3,24が共に開弁して、各集合部15,16を連通す
る開口面積を段階的に変化させることにより、吸気の気
柱慣性を利用した慣性過給に切換える。図5は各制御弁
23,24の開閉に応じた発生トルク特性を測定した実
験結果を示しており、この特性に基づいて回転数に応じ
て最も高い発生トルクが得られるように各制御弁23,
24を開閉制御するようになっている。
The intake air taken in from an air cleaner (not shown) is introduced from each throttle chamber into each introduction pipe 17,1.
After being sent to each of the collecting portions 15 and 16 through 8 and is then sucked into each of the cylinders that sequentially enter the suction stroke through the branch pipes 13 and 14. In a predetermined low rotation speed range, the control valves 23 and 24 are both closed to cut off the communication between the collecting portions 15 and 16, so that the pulsation energy of intake air is used to perform resonance supercharging.
Only one of the control valves 23 and 24 is selectively opened in a predetermined medium rotation range, and each control valve 2 is opened in a predetermined high rotation range.
Both valves 3 and 24 open to change the opening area for communicating the collecting portions 15 and 16 in a stepwise manner, thereby switching to inertia supercharging using the air column inertia of intake air. FIG. 5 shows an experimental result of measuring generated torque characteristics according to opening / closing of each control valve 23, 24. ,
The opening and closing of 24 is controlled.

【0031】吸気マニホールド6は各分枝管13,14
の並列部13a,14aを互いに並列に交差し、各分枝
管13,14から各集合部15,16を経て各導入管1
7,18へと水平方向に延びているため、エンジン全高
を抑えつつ、各吸気路長を十分に確保している。
The intake manifold 6 includes branch pipes 13 and 14
Of the parallel pipes 13a and 14a in parallel with each other, and from the branch pipes 13 and 14 through the collecting portions 15 and 16 to the introduction pipes 1
Since it extends horizontally to 7 and 18, each intake path length is sufficiently secured while suppressing the overall height of the engine.

【0032】連通管20を各分枝管13,14の上方に
延びる偏平な箱形とし、連通管20の内部を仕切り壁2
7を設けて2つの連通路21,22を画成するため、各
連通路をそれぞれ独立した管で形成する構造に比べて、
各連通路21,22の外形寸法を抑えつつ通路断面積を
十分に確保することができる。
The communication pipe 20 has a flat box shape extending above the respective branch pipes 13 and 14, and the inside of the communication pipe 20 is divided by the partition wall 2.
Since 7 is provided to define the two communication passages 21 and 22, as compared with the structure in which each communication passage is formed by an independent pipe,
It is possible to secure a sufficient passage cross-sectional area while suppressing the outer dimensions of the communication passages 21 and 22.

【0033】エンジンフード10は車両後方から前方に
かけて下方に傾斜して配置されるのに対し、第一連通路
21を画成する第一天井壁部21aを、第二連通路22
を画成する第二天井壁部22aより低く形成し、第一天
井壁部21aと第二天井壁部22aの間にはエンジンフ
ード10に沿って段差28が形成されているため、エン
ジンフード10の取付け位置が吸気マニホールド6によ
って増大することが最小限に抑えられる。この結果、エ
ンジンフード10を低くするとともに、傾斜角を大きく
して、車両の空気抵抗を小さくすることが可能となる。
The engine hood 10 is arranged so as to be inclined downward from the rear of the vehicle to the front thereof, while the first ceiling wall portion 21a defining the first series passage 21 is provided with the second communication passage 22.
Is formed lower than the second ceiling wall portion 22a defining the above, and a step 28 is formed along the engine hood 10 between the first ceiling wall portion 21a and the second ceiling wall portion 22a. The increase in the mounting position of the intake manifold 6 is minimized. As a result, the engine hood 10 can be lowered and the inclination angle can be increased to reduce the air resistance of the vehicle.

【0034】断面積の比較的大きい第二連通路22は第
一連通路21より後方に配置されており、各導入管平行
部17b,18bを通過する吸気流に与えられる機関後
方に向かう勢力を利用して第二連通路22に吸気流が流
入することを促し、高回転時の吸入効率を高めるように
なっている。
The second communicating passage 22 having a relatively large cross-sectional area is disposed rearward of the first continuous passage 21 and exerts a force toward the rear of the engine which is given to the intake air flow passing through the introduction pipe parallel portions 17b and 18b. Utilizing this, the intake flow is promoted to flow into the second communication passage 22, and the intake efficiency at high speed is enhanced.

【0035】また、連通管20をアッパーマニホールド
12より上方に配置するとともに、平面図(図1)上に
おいて、各集合部15,16に対する連通管20の各接
合フランジ35,36を前後端に位置する各分枝管1
3,14の管壁13c,14cより内側に配置したた
め、連通管20がアッパーマニホールド12からオーバ
ーハングすることがなく、連通管20のアッパーマニホ
ールド12に対する結合剛性を4本のボルトを介して十
分に確保することができる。この結果、機関振動や外部
からの衝撃により連通管20が大きく振動することがな
く、連通管20とアッパーマニホールド12間の介装さ
れるシール材に過大な荷重が作用することが防止され、
特殊なシール材を用いたり、連通管20を締結するボル
トの本数を増やす必要がない。
Further, the communication pipe 20 is arranged above the upper manifold 12, and the joint flanges 35 and 36 of the communication pipe 20 for the collecting portions 15 and 16 are located at the front and rear ends in the plan view (FIG. 1). Each branch pipe 1
Since the pipes 13 and 14 are arranged on the inner side of the pipe walls 13c and 14c, the communication pipe 20 does not overhang from the upper manifold 12, and the connection pipe 20 has sufficient coupling rigidity with the upper manifold 12 through the four bolts. Can be secured. As a result, the communication pipe 20 does not vibrate significantly due to engine vibration or impact from the outside, and an excessive load is prevented from acting on the seal material interposed between the communication pipe 20 and the upper manifold 12.
There is no need to use a special sealing material or increase the number of bolts for fastening the communication pipe 20.

【0036】次に、図6に示した他の実施例は、連通管
50として3つの連通路51,52,53が設けられ、
各連通路51,52,53の天井壁部51a,52a,
53aの高さがエンジンフード10に沿って段階的に低
められるものである。各連通路51,52,53の途中
には制御弁がそれぞれ介装されており、エンジン回転数
に応じて各連通路51,52,53が選択的に開閉制御
され、エンジンの発生トルクをさらに高められるように
なっている。
Next, in another embodiment shown in FIG. 6, three communicating passages 51, 52, 53 are provided as the communicating pipe 50,
Ceiling wall portions 51a, 52a of the communication passages 51, 52, 53,
The height of 53a is gradually lowered along the engine hood 10. A control valve is provided in the middle of each of the communication passages 51, 52, 53, and the communication passages 51, 52, 53 are selectively opened / closed according to the engine speed to further increase the torque generated by the engine. It can be raised.

【0037】この場合、各天井壁部51a,52a,5
3aの断面は円弧形に湾曲して形成されているが、各天
井壁部51a,52a,53aの高さを車両後方から前
方にかけて段階的に低めることにより、同じく車両後方
から前方にかけて低く傾斜して取り付けられるエンジン
フード10の取付け高さが吸気マニホールド6によって
増大することが最小限に抑えられる。
In this case, each ceiling wall portion 51a, 52a, 5
Although the cross section of 3a is curved in an arc shape, the height of each ceiling wall portion 51a, 52a, 53a is gradually lowered from the rear side to the front side of the vehicle, so that it is also inclined low from the rear side to the front side of the vehicle. The increase in the mounting height of the engine hood 10 to be mounted by the intake manifold 6 is minimized.

【0038】なお、各集合部を連通する各連通路の断面
形状は矩形や円形に限らず、各連通路の断面形状を部分
的に台形や三角形に変化させて、エンジンフードとの干
渉を避けるようにしても良い。
The cross-sectional shape of each communication passage communicating with each collecting portion is not limited to a rectangle or a circle, but the cross-sectional shape of each communication passage is partially changed to a trapezoid or a triangle to avoid interference with the engine hood. You may do it.

【0039】[0039]

【発明の効果】以上説明したように本発明は、点火順序
の連続しない気筒群に連通する分枝管どうしを集合させ
る複数の集合部と、各集合部を連通する複数の連通路
と、各連通路を運転条件に応じて開閉する制御弁とを備
える自動車用エンジンの可変吸気装置において、前記各
連通路を車両の前後方向に並んで設け、各連通路の天井
壁部の高さを車両前方より後方が高くなるように段階的
に変化させたため、吸気通路面積を十分に確保しつつ、
エンジンフードの取付け高さが吸気マニホールドによっ
て増大することを最小限に抑え、自動車のデザイン自由
度をひろげられる。
As described above, according to the present invention, a plurality of gathering portions for gathering branch pipes communicating with a cylinder group having a non-continuous ignition sequence, a plurality of communicating passages for communicating each gathering portion, and In a variable intake system for an automobile engine, comprising: a control valve that opens and closes the communication passage in accordance with operating conditions, the communication passages are provided side by side in the front-back direction of the vehicle, and the height of the ceiling wall portion of each communication passage is set to Since it is changed stepwise so that the rear is higher than the front, while securing a sufficient intake passage area,
This minimizes the increase in the mounting height of the engine hood due to the intake manifold, and expands the degree of freedom in vehicle design.

【0040】また、V型エンジンを縦置きに搭載し、各
集合部を左右バンクの上方に配置するとともに、各連通
路を各集合部の上方に配置したため、エンジンフードの
取付け高さを抑えつつ、各連通路を画成する連通管を吸
気マニホールドにオーバハングして取付ける構造に比べ
て各連通路を画成する連通管の結合剛性を十分に確保で
き、連通管の接合部のシール性を良好に維持することが
できる。
Further, since the V-type engine is mounted vertically and each collecting portion is arranged above the left and right banks, and each communicating passage is arranged above each collecting portion, the mounting height of the engine hood can be suppressed. , Compared with the structure in which the communication pipes that define each communication passage are overhung and attached to the intake manifold, the coupling rigidity of the communication pipes that define each communication passage can be sufficiently secured, and the sealing properties of the joints of the communication pipes are good. Can be maintained at.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例を示す側面図である。FIG. 1 is a side view showing an embodiment of the present invention.

【図2】同じくエンジンの正面図である。FIG. 2 is a front view of the engine of the same.

【図3】同じく吸気マニホールドの平面図である。FIG. 3 is a plan view of an intake manifold of the same.

【図4】同じく連通管の斜視図である。FIG. 4 is a perspective view of the communication pipe.

【図5】同じくエンジンのトルク特性図である。FIG. 5 is a torque characteristic diagram of the engine.

【図6】他の実施例を示す側面図である。FIG. 6 is a side view showing another embodiment.

【図7】従来例を示すエンジンの正面図である。FIG. 7 is a front view of an engine showing a conventional example.

【図8】同じくエンジンの平面図である。FIG. 8 is a plan view of the engine of the same.

【符号の説明】[Explanation of symbols]

10 エンジンフード 13 分枝管 14 分枝管 15 集合部 16 集合部 20 連通管 21 第一連通路 21a 第一天井壁 22 第二連通路 22a 第二天井壁 23 第一制御弁 24 第二制御弁 10 engine hood 13 branch pipe 14 branch pipe 15 collecting part 16 collecting part 20 communicating pipe 21 first series passage 21a first ceiling wall 22 second communicating passage 22a second ceiling wall 23 first control valve 24 second control valve

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 点火順序の連続しない気筒群に連通する
分枝管どうしを集合させる複数の集合部と、各集合部を
連通する複数の連通路と、各連通路を運転条件に応じて
開閉する制御弁とを備える自動車用エンジンの可変吸気
装置において、前記各連通路を車両の前後方向に並んで
設け、各連通路の天井壁部の高さを車両前方より後方が
高くなるように段階的に変化させたことを特徴とする自
動車用エンジンの可変吸気装置。
1. A plurality of gathering portions for gathering branch pipes communicating with a group of cylinders whose ignition order is not continuous, a plurality of communicating passages for communicating the gathering portions, and opening and closing of each communicating passage according to operating conditions. In the variable intake device for an automobile engine including a control valve, the communication passages are arranged side by side in the front-rear direction of the vehicle, and the height of the ceiling wall portion of each communication passage is higher in the rear than in the front of the vehicle. A variable intake system for an automobile engine, which is characterized by a characteristic change.
【請求項2】 各気筒群をV型に対向する左右バンクに
配列し、このバンクが車両の前後方向に延びるように縦
置きし、各集合部を左右バンクの上方に配置するととも
に、各連通路を各集合部の上方に配置したことを特徴と
する請求項1記載の自動車用エンジンの可変吸気装置。
2. A cylinder group is arranged in left and right banks facing each other in a V-shape, and the banks are vertically arranged so as to extend in the front-rear direction of the vehicle. 2. The variable intake system for an automobile engine according to claim 1, wherein the passage is arranged above each collecting portion.
JP18615492A 1992-06-19 1992-06-19 Variable intake system for automotive engine Expired - Lifetime JP2842060B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP18615492A JP2842060B2 (en) 1992-06-19 1992-06-19 Variable intake system for automotive engine
US08/070,852 US5322038A (en) 1992-06-19 1993-06-03 Suction system for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18615492A JP2842060B2 (en) 1992-06-19 1992-06-19 Variable intake system for automotive engine

Publications (2)

Publication Number Publication Date
JPH062626A true JPH062626A (en) 1994-01-11
JP2842060B2 JP2842060B2 (en) 1998-12-24

Family

ID=16183330

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18615492A Expired - Lifetime JP2842060B2 (en) 1992-06-19 1992-06-19 Variable intake system for automotive engine

Country Status (1)

Country Link
JP (1) JP2842060B2 (en)

Also Published As

Publication number Publication date
JP2842060B2 (en) 1998-12-24

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