JPH06137225A - Intake device of multiple cylinder gasoline engine - Google Patents
Intake device of multiple cylinder gasoline engineInfo
- Publication number
- JPH06137225A JPH06137225A JP30936292A JP30936292A JPH06137225A JP H06137225 A JPH06137225 A JP H06137225A JP 30936292 A JP30936292 A JP 30936292A JP 30936292 A JP30936292 A JP 30936292A JP H06137225 A JPH06137225 A JP H06137225A
- Authority
- JP
- Japan
- Prior art keywords
- forming chamber
- air
- vortex forming
- fuel mixture
- passage
- 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
Links
Classifications
-
- 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
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は多気筒ガソリンエンジン
の吸気装置に関し、詳しくは、各吸気ポートを介して各
気筒に供給される分配混合気の空燃比が、気化器で設定
された適性な空燃比からずれるのを防止できるものに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for a multi-cylinder gasoline engine. More specifically, the air-fuel ratio of a distributed air-fuel mixture supplied to each cylinder through each intake port has a proper value set by a carburetor. The present invention relates to a device capable of preventing deviation from the air-fuel ratio.
【０００２】[0002]
【従来の技術】気筒ガソリンエンジンの吸気装置の従来
技術として、図２に示すものがある。これは、本発明と
同様、次の基本構造を備えている。すなわち、気化器１
０１を混合気分配通路１０２を介して複数の吸気ポート
１０３ａ・１０３ｂ・１０３ｃに連通させて構成してあ
る。かかる基本構造を備えた吸気装置では、気化器１０
１から流出した混合気１１１が、混合気分配通路１０２
と各吸気ポート１０３ａ・１０３ｂ・１０３ｃとを介
し、分配混合気１１２ａ・１１２ｂ・１１２ｃとして各
気筒に供給される。2. Description of the Related Art As a conventional art of an intake system for a cylinder gasoline engine, there is one shown in FIG. Like the present invention, it has the following basic structure. That is, the vaporizer 1
01 is made to communicate with a plurality of intake ports 103a, 103b, 103c through the mixture distribution passage 102. In the intake device having such a basic structure, the carburetor 10
The air-fuel mixture 111 that has flowed out of the first air-fuel mixture 1
And the intake air ports 103a, 103b, 103c, respectively, to supply to each cylinder as distributed air-fuel mixture 112a, 112b, 112c.
【０００３】ところで、この従来技術では、気化器１０
１に接続する混合気分配通路１０２の入口通路１５１
を、混合気分配通路１０２の中央部付近に向けてある。By the way, in this prior art, the vaporizer 10
1, the inlet passage 151 of the mixture distribution passage 102 connected to
Is directed toward the vicinity of the center of the air-fuel mixture distribution passage 102.
【０００４】[0004]
【発明が解決しようとする課題】上記従来技術では、気
化器１０１から完全に気化しないまま飛び出した燃料油
滴１１０が、その慣性力により混合気分配通路１０２内
を飛行して、中央の吸気ポート１０３ｂに多く飛び込
む。このため、中央の吸気ポート１０３ｂ内では、燃料
油滴１１０の気化により、分配混合気１１２ａの燃料比
率が、気化器１０１で設定された適正な比率よりも過大
となり、その分、両側の吸気ポート１０３ａ・１０３ｃ
内の分配混合気１１２ａ・１１２ｃの燃料比率が過小と
なる。In the above-mentioned prior art, the fuel oil droplet 110 that has jumped out of the carburetor 101 without being completely vaporized flies in the air-fuel mixture distribution passage 102 due to its inertial force, and the central intake port. Many jump into 103b. Therefore, in the central intake port 103b, the fuel ratio of the distributed air-fuel mixture 112a becomes excessively higher than the proper ratio set by the carburetor 101 due to the vaporization of the fuel oil droplets 110, and the intake ports on both sides are correspondingly increased. 103a ・ 103c
The fuel ratio of the distributed air-fuel mixture 112a and 112c inside is too small.
【０００５】そして、燃料比率が過大な分配混合気１１
２ｂが供給された気筒から多くの未燃焼有害成分を含む
排気が排出され、周囲の環境を汚染する。また、燃料比
率が過小な分配混合気１１２ａ・１１２ｃが供給された
気筒では、燃焼が不十分となり、エンジンの出力を低下
させる。Then, the distribution mixture 11 with an excessive fuel ratio
Exhaust gas containing many unburned harmful components is discharged from the cylinder to which 2b is supplied, and pollutes the surrounding environment. Further, in the cylinders to which the distributed air-fuel mixture 112a / 112c with an excessively low fuel ratio is supplied, the combustion becomes insufficient and the output of the engine is reduced.
【０００６】本発明の課題は、多気筒ガソリンエンジン
の吸気装置において、各気筒に供給される分配混合気の
空燃比が、気化器で設定された適正な空燃比からずれる
のを防止することにある。An object of the present invention is to prevent the air-fuel ratio of the distributed air-fuel mixture supplied to each cylinder from deviating from the proper air-fuel ratio set by the carburetor in the intake system of a multi-cylinder gasoline engine. is there.
【０００７】[0007]
（第１発明）第１発明は、図１に例示するように、気化
器１を混合気分配通路２を介して複数の吸気ポート３ａ
・３ｂ・３ｃに連通させて構成した、多気筒ガソリンエ
ンジンの吸気装置において、次のようにしたことを特徴
とする。(First Invention) As shown in FIG. 1, a first invention is that a carburetor 1 is provided with a plurality of intake ports 3a via a mixture distribution passage 2.
An air intake device for a multi-cylinder gasoline engine, which is configured to communicate with 3b and 3c, is characterized as follows.
【０００８】すなわち、上記気化器１と混合気分配通路
２との間に円形のうず形成室４を介設し、気化器１に接
続するうず形成室４の入口通路５を、うず形成室４の内
周面６の接線方向に沿わせるとともに、混合気分配通路
２に接続するうず形成室４の出口通路７を、うず形成室
４の旋回中心軸線８に沿わせた。That is, a circular vortex forming chamber 4 is provided between the vaporizer 1 and the air-fuel mixture distribution passage 2, and the inlet passage 5 of the vortex forming chamber 4 connected to the vaporizer 1 is connected to the vortex forming chamber 4 The outlet passage 7 of the vortex forming chamber 4 connected to the air-fuel mixture distribution passage 2 is arranged along the swirl center axis 8 of the vortex forming chamber 4 along the tangential direction of the inner peripheral surface 6.
【０００９】（第２発明）第２発明は、図１に例示する
ように、第１発明の多気筒ガソリンエンジンの吸気装置
において、うず形成室４を平面視円形状に設けるととも
に、このうず形成室４の出口通路７をうず形成室４から
下向きに導出し、うず形成室４の下部外周と出口通路７
の外周にわたって加温部９を設けた。(Second Invention) As shown in FIG. 1, the second invention is such that, in the intake system for a multi-cylinder gasoline engine of the first invention, the vortex forming chamber 4 is provided in a circular shape in plan view and the vortex formation is performed. The outlet passage 7 of the chamber 4 is led out downward from the vortex forming chamber 4, and the outer periphery of the lower portion of the vortex forming chamber 4 and the outlet passage 7
A heating unit 9 was provided along the outer periphery of the.
【００１０】[0010]
（第１発明）気化器１から流出した混合気１１は、入口
通路５の案内でうず形成室４に流入し、うず形成室４の
内周面６の案内で旋回流となり、出口通路７内で旋回を
続けながら、混合気分配通路２に流出する。完全に気化
しないまま気化器１から飛び出した燃料油滴１０は、こ
の混合気１１の旋回流に巻き込まれて気化する。このた
め、燃料油滴１０を殆ど含まない良好な気化状態の混合
気１１が混合気分配通路２に流入し、ここから各吸気ポ
ート３ａ・３ｂ・３ｃを経て各気筒に供給される分配混
合気１２ａ・１２ｂ・１２ｃの空燃比が、気化器１で設
定された適正な空燃比からずれることがない。(First Invention) The air-fuel mixture 11 flowing out from the vaporizer 1 flows into the vortex forming chamber 4 by the guide of the inlet passage 5, becomes a swirl flow by the guide of the inner peripheral surface 6 of the vortex forming chamber 4, and enters the outlet passage 7. While continuing to swirl at, it flows out to the mixture distribution passage 2. The fuel oil droplets 10 that have jumped out of the vaporizer 1 without being completely vaporized are caught in the swirling flow of the air-fuel mixture 11 and vaporized. Therefore, the air-fuel mixture 11 in a good vaporization state containing almost no fuel oil droplets 10 flows into the air-fuel mixture distribution passage 2 and is supplied to the respective cylinders through the intake ports 3a, 3b, 3c. The air-fuel ratios of 12a, 12b, and 12c do not deviate from the proper air-fuel ratio set by the carburetor 1.
【００１１】（第２発明）第１発明の作用に加え、次の
ように作用する。すなわち、混合気１１の旋回流で気化
しなかった燃料油滴１０は、うず形成室４の下部の内
面、出口通路７の内面を伝って流れる際に、加温部９の
熱で気化する。(Second invention) In addition to the operation of the first invention, the following operation is performed. That is, the fuel oil droplets 10 that have not been vaporized by the swirling flow of the air-fuel mixture 11 are vaporized by the heat of the heating unit 9 when flowing along the inner surface of the lower portion of the vortex forming chamber 4 and the inner surface of the outlet passage 7.
【００１２】[0012]
【発明の効果】 （第１発明）気化器から飛び出した燃料油滴が、うず形
成室で発生する混合気の旋回流に巻き込まれて気化し、
各気筒に分配される分配混合気の空燃比が、気化器で設
定された適正な空燃比からずれることがない。このた
め、排気中の未燃焼有害成分の含有量を低く押さえるこ
とができ、周囲環境の汚染を防止できる。また、各気筒
での燃焼が適正に行われ、エンジン出力を高く維持でき
る。EFFECTS OF THE INVENTION (First Invention) Fuel oil droplets ejected from a vaporizer are vaporized by being entrained in a swirling flow of an air-fuel mixture generated in a vortex forming chamber,
The air-fuel ratio of the distributed air-fuel mixture distributed to each cylinder does not deviate from the proper air-fuel ratio set by the carburetor. Therefore, the content of unburned harmful components in the exhaust gas can be suppressed to a low level, and pollution of the surrounding environment can be prevented. Further, combustion is properly performed in each cylinder, and the engine output can be maintained high.
【００１３】（第２発明）第２発明は、上記第１発明の
効果に加え、次の効果を奏する。すなわち、混合気の旋
回流で気化しなかった燃料油滴は、うず形成室の下部の
内面、出口通路の内面を伝って流れる際に、加温部の熱
で気化する。このため、燃料油滴の発生量が多い寒冷時
等、混合気の旋回流のみでは燃料油滴を完全に気化しに
くい場合でも、燃料油滴を加温部の熱で完全に気化でき
る。(Second Invention) In addition to the effects of the first invention, the second invention has the following effects. That is, the fuel oil droplets that have not been vaporized by the swirling flow of the air-fuel mixture are vaporized by the heat of the heating unit when flowing along the inner surface of the lower portion of the vortex forming chamber and the inner surface of the outlet passage. Therefore, even when the fuel oil droplets are difficult to be completely vaporized only by the swirling flow of the air-fuel mixture, such as in cold weather where the amount of generated fuel oil droplets is large, the fuel oil droplets can be completely vaporized by the heat of the heating unit.
【００１４】[0014]
【実施例】本発明の実施例を図面に基づいて述べる。図
１は３気筒ガソリンエンジンの吸気装置を説明する図
で、図１（Ａ）は要部縦断平面図、図１（Ｂ）は要部縦
断側面図である。Embodiments of the present invention will be described with reference to the drawings. 1A and 1B are views for explaining an intake system of a three-cylinder gasoline engine. FIG. 1A is a vertical plan view of a main part and FIG. 1B is a side view of a main part.
【００１５】図１（Ａ）に示すように、この３気筒ガソ
リンエンジンは、シリンダヘッド１６内に３個の吸気ポ
ート３ａ・３ｂ・３ｃをあけてある。そして、気化器１
を混合気分配通路２を介してこの吸気ポート３ａ・３ｂ
・３ｃに連通させてある。混合気分配通路２は、インテ
ークマニホルド１５内に設けられ、前端から後端に向け
て次第に幅が縮まる直角三角形状に形成してある。気化
器１と混合気分配通路２との間にはうず形成室４を介設
してある。As shown in FIG. 1 (A), this three-cylinder gasoline engine has three intake ports 3a, 3b and 3c in a cylinder head 16. And vaporizer 1
Through the mixture distribution passage 2 to the intake ports 3a, 3b
・ Communicated with 3c. The air-fuel mixture distribution passage 2 is provided in the intake manifold 15, and is formed in the shape of a right triangle whose width gradually decreases from the front end to the rear end. A vortex forming chamber 4 is provided between the vaporizer 1 and the air-fuel mixture distribution passage 2.
【００１６】うず形成室４は平面視円形に形成し、うず
形成室４の入口通路５は、うず形成室４の内周面６の接
線方向に沿う直線状に水平に形成し、これを気化器１に
接続してある。図１（Ｂ）に示すように、うず形成室４
の出口通路７は、うず形成室７の旋回中心軸線８に沿っ
て、うず形成室４の内底中央部から下向きに導出し、こ
れを混合気分配通路２の前端上部に接続してある。The vortex forming chamber 4 is formed in a circular shape in plan view, and the inlet passage 5 of the vortex forming chamber 4 is formed horizontally in a straight line along the tangential direction of the inner peripheral surface 6 of the vortex forming chamber 4 and vaporized. It is connected to the vessel 1. As shown in FIG. 1B, the vortex forming chamber 4
The outlet passage 7 extends downward from the center of the inner bottom of the vortex forming chamber 4 along the central axis 8 of rotation of the vortex forming chamber 7 and is connected to the upper end of the front end of the mixture distribution passage 2.
【００１７】また、うず形成室４の下部外周と出口通路
７の外周にわたって加温部９となる温水ジャケット１３
を設け、これをエンジンの水冷ジャケット１４と連通
し、水冷ジャケット１４から加温された冷却水が温水ジ
ャケット１３に供給されるようにしてある。温水ジャケ
ット１３に供給された冷却水は、所定の出口（図外）か
らエンジンの冷却系に還流する。Further, a hot water jacket 13 serving as a heating portion 9 is provided over the outer periphery of the lower portion of the vortex forming chamber 4 and the outer periphery of the outlet passage 7.
Is provided and communicates with the water cooling jacket 14 of the engine so that the cooling water heated from the water cooling jacket 14 is supplied to the hot water jacket 13. The cooling water supplied to the hot water jacket 13 flows back to the engine cooling system from a predetermined outlet (not shown).
【００１８】この吸気装置の機能は次の通りである。気
化器１から流出した混合気１１は、入口通路５の案内で
うず形成室４に流入し、うず形成室４の内周面６の案内
で旋回流となり、出口通路７内で旋回を続けながら、混
合気分配通路２に放射状に流出する。完全に気化しない
まま気化器１から飛び出した燃料油滴１０は、この混合
気１１の旋回流に巻き込まれて気化する。このため、燃
料油滴１０を殆ど含まない良好な気化状態の混合気１１
が混合気分配通路２に流入し、ここから各吸気ポート３
ａ・３ｂ・３ｃを経て各気筒に供給される分配混合気１
２ａ・１２ｂ・１２ｃの空燃比が、気化器１で設定され
た適正な空燃比からずれることがない。また、混合気１
１の旋回流で気化しなかった燃料油滴１０は、うず形成
室４の下部の内面、出口通路７の内面を伝って流れる際
に、温水ジャケット１３の熱で気化する。The function of this intake device is as follows. The air-fuel mixture 11 flowing out from the vaporizer 1 flows into the vortex forming chamber 4 by the guide of the inlet passage 5, becomes a swirl flow by the guide of the inner peripheral surface 6 of the vortex forming chamber 4, and continues to swirl in the outlet passage 7. , Radially outflow into the mixture distribution passage 2. The fuel oil droplets 10 that have jumped out of the vaporizer 1 without being completely vaporized are caught in the swirling flow of the air-fuel mixture 11 and vaporized. Therefore, the gas mixture 11 in a good vaporized state containing almost no fuel oil droplets 10
Flows into the air-fuel mixture distribution passage 2, from which each intake port 3
Distribution mixture 1 supplied to each cylinder through a, 3b and 3c
The air-fuel ratios of 2a, 12b, and 12c do not deviate from the proper air-fuel ratio set by the carburetor 1. Also, mixture 1
The fuel oil droplets 10 that have not been vaporized by the swirling flow of No. 1 are vaporized by the heat of the hot water jacket 13 when flowing along the inner surface of the lower portion of the vortex forming chamber 4 and the inner surface of the outlet passage 7.
【００１９】本発明の実施例の内容は以上の通りである
が、本発明は上記実施例に限定されるものではない。例
えば、上記実施例では、うず形成室４の出口通路７を混
合気分配通路２の前端部に接続したが、これは混合気分
配通路２の中央部や後端部に接続してもよい。また、上
記実施例では、うず形成室４を平面視円形としたが、第
１発明の場合には、側面視円形としてもよく、この場合
には、出口通路７は横向きに導出される。また、上記実
施例では、加温部９を温水ジャケット１３で構成した
が、これに代えて、エンジンの排気ガスを通過させる温
熱ガスジャケット、エンジンの潤滑油を通過させる温熱
油ジャケット、電熱線等を用いてもよい。The contents of the embodiments of the present invention are as described above, but the present invention is not limited to the above embodiments. For example, in the above embodiment, the outlet passage 7 of the vortex forming chamber 4 is connected to the front end portion of the air-fuel mixture distribution passage 2, but it may be connected to the central portion or the rear end portion of the air-fuel mixture distribution passage 2. Further, although the vortex forming chamber 4 is circular in plan view in the above-described embodiment, it may be circular in side view in the case of the first invention, and in this case, the outlet passage 7 is led out sideways. Further, in the above-described embodiment, the heating section 9 is constituted by the hot water jacket 13, but instead of this, a hot gas jacket for passing engine exhaust gas, a hot oil jacket for passing engine lubricating oil, a heating wire, etc. May be used.
【図１】３気筒ガソリンエンジンの吸気装置を説明する
図で、図１（Ａ）は要部縦断平面図、図１（Ｂ）は要部
縦断側面図である。1A and 1B are views for explaining an intake system of a three-cylinder gasoline engine, FIG. 1A is a vertical plan view of a main part, and FIG.
【図２】従来技術の図１（Ａ）相当図である。FIG. 2 is a view corresponding to FIG. 1 (A) of a conventional technique.
１…気化器、２…混合気分配通路、３ａ・３ｂ・３ｃ…
吸気ポート、４……うず形成室、５…４の入口通路、６
…４の内周面、７…４の出口通路、８…４の旋回中心軸
線、９…加温部。1 ... Vaporizer, 2 ... Mixture distribution passage, 3a / 3b / 3c ...
Intake port, 4 ... Vortex forming chamber, 5 ... 4 inlet passage, 6
4 inner peripheral surface, 7 4 outlet passage, 8 swivel center axis, 9 warming section.
Claims (2)
て複数の吸気ポート(３ａ)・(３ｂ)・(３ｃ)に連通させ
て構成した、多気筒ガソリンエンジンの吸気装置におい
て、 上記気化器(１)と混合気分配通路(２)との間に円形のう
ず形成室(４)を介設し、気化器(１)に接続するうず形成
室(４)の入口通路(５)を、うず形成室(４)の内周面(６)
の接線方向に沿わせるとともに、混合気分配通路(２)に
接続するうず形成室(４)の出口通路(７)を、うず形成室
(４)の旋回中心軸線(８)に沿わせた、ことを特徴とする
多気筒ガソリンエンジンの吸気装置。1. An intake system for a multi-cylinder gasoline engine, comprising a carburetor (1) communicating with a plurality of intake ports (3a), (3b), (3c) via a mixture distribution passage (2). In, a circular vortex forming chamber (4) is provided between the vaporizer (1) and the mixture distribution passage (2), and the inlet passage of the vortex forming chamber (4) is connected to the carburetor (1). (5) to the inner peripheral surface (6) of the vortex forming chamber (4)
Of the vortex forming chamber (4) connected to the mixture distribution passage (2) along the tangential direction of the vortex forming chamber (4).
An intake system for a multi-cylinder gasoline engine, characterized in that it is arranged along the turning center axis (8) of (4).
ジンの吸気装置において、うず形成室(４)を平面視円形
状に設けるとともに、このうず形成室(４)の出口通路
(７)をうず形成室(４)から下向きに導出し、うず形成室
(４)の下部外周と出口通路(７)の外周にわたって加温部
(９)を設けた、ことを特徴とする多気筒ガソリンエンジ
ンの吸気装置。2. The intake system for a multi-cylinder gasoline engine according to claim 1, wherein the vortex forming chamber (4) is provided in a circular shape in plan view, and an outlet passage of the vortex forming chamber (4) is provided.
Pull out (7) downward from the vortex forming chamber (4),
The heating section extends over the outer circumference of the lower part of (4) and the outer circumference of the outlet passage (7).
An intake system for a multi-cylinder gasoline engine, characterized in that (9) is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30936292A JP2802861B2 (en) | 1992-10-23 | 1992-10-23 | Multi-cylinder gasoline engine intake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30936292A JP2802861B2 (en) | 1992-10-23 | 1992-10-23 | Multi-cylinder gasoline engine intake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06137225A true JPH06137225A (en) | 1994-05-17 |
| JP2802861B2 JP2802861B2 (en) | 1998-09-24 |
Family
ID=17992092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30936292A Expired - Lifetime JP2802861B2 (en) | 1992-10-23 | 1992-10-23 | Multi-cylinder gasoline engine intake system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2802861B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100192906A1 (en) * | 2006-10-24 | 2010-08-05 | David Littlewood Johnson | Induction and fuel delivery system for piston engine |
| WO2013047173A1 (en) * | 2011-09-27 | 2013-04-04 | アイシン精機株式会社 | Air intake device |
| JP2020002920A (en) * | 2018-06-30 | 2020-01-09 | 株式会社クボタ | Intake manifold |
-
1992
- 1992-10-23 JP JP30936292A patent/JP2802861B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100192906A1 (en) * | 2006-10-24 | 2010-08-05 | David Littlewood Johnson | Induction and fuel delivery system for piston engine |
| US8627799B2 (en) * | 2006-10-24 | 2014-01-14 | David Littlewood Johnson | Induction and fuel delivery system for piston engine |
| WO2013047173A1 (en) * | 2011-09-27 | 2013-04-04 | アイシン精機株式会社 | Air intake device |
| JP2020002920A (en) * | 2018-06-30 | 2020-01-09 | 株式会社クボタ | Intake manifold |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2802861B2 (en) | 1998-09-24 |
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