JPH0377379B2 - - Google Patents
Info
- Publication number
- JPH0377379B2 JPH0377379B2 JP57018663A JP1866382A JPH0377379B2 JP H0377379 B2 JPH0377379 B2 JP H0377379B2 JP 57018663 A JP57018663 A JP 57018663A JP 1866382 A JP1866382 A JP 1866382A JP H0377379 B2 JPH0377379 B2 JP H0377379B2
- Authority
- JP
- Japan
- Prior art keywords
- intake
- cylinder head
- engine
- valve
- intake 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.)
- Expired - Lifetime
Links
- 238000005192 partition Methods 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F02M35/10078—Connections of intake systems to the engine
- F02M35/10085—Connections of intake systems to the engine having a connecting piece, e.g. a flange, between the engine and the air intake being foreseen with a throttle valve, fuel injector, mixture ducts or the like
-
- 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
- F02M35/108—Intake manifolds with primary and secondary intake passages
-
- 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
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10111—Substantially V-, C- or U-shaped ducts in direction of the flow path
-
- 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
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
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)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は１気筒当たり２個の吸気弁を設け、そ
の吸気弁の一方に低負荷運転中は閉塞弁によつて
高負荷用通路を、また、他方に全部の負荷範囲に
亘つて作用する全域用通路をそれぞれ接続した吸
気通路の改良に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides two intake valves per cylinder, and during low-load operation, a high-load passage is connected to one of the intake valves by a blockage valve. The present invention also relates to an improvement in the intake passages, each of which is connected to the other by a wide range passage that acts over the entire load range.
従来、前述のような高負荷用通路と全域用通路
との二種の吸気通路を有するエンジンは既に公知
に属し、加速応答性の向上と燃料消費の低減を図
るべく種々研究されている。（例えば特開昭55−
51920号公報）。従来のこの種のエンジンでは、各
吸気弁に連らなる吸気ポートは断面円形に形成さ
れていた。
Conventionally, engines having two types of intake passages, a high-load passage and a wide-range passage as described above, are already known, and various studies have been conducted to improve acceleration response and reduce fuel consumption. (For example, JP-A-55-
Publication No. 51920). In conventional engines of this type, the intake ports connected to each intake valve were formed to have a circular cross section.
しかしながら、各吸気弁に連らなる吸気ポート
の断面形状を従来のように円形とすると、閉塞弁
の製作が容易である反面、シリンダヘツド内に余
肉が増し、シリンダヘツドの大型化と重量増加を
免れない。本発明はこのような不具合を解消すべ
くなされたもので、その目的とするところは、シ
リンダヘツド内に形成される１気筒当たり２個の
吸気ポートの構造を改良してエンジンの小型、軽
量化を図ることである。
However, if the cross-sectional shape of the intake port connected to each intake valve is made circular as in the past, it is easy to manufacture a blockage valve, but on the other hand, there is an increase in excess thickness inside the cylinder head, which increases the size and weight of the cylinder head. cannot be avoided. The present invention was made to solve these problems, and its purpose is to make the engine smaller and lighter by improving the structure of the two intake ports per cylinder formed in the cylinder head. It is to aim for.
本発明に係るエンジンの吸気通路装置は、１気
筒当たり２個の吸気通路を有し、一方の吸気通路
がエンジンの低負荷運転時に蝶形の閉塞弁によつ
て閉塞されるエンジンの吸気通路装置において、
シリンダヘツドの側面に吸気弁を介して燃焼室へ
連らなる２個の吸気ポートを水平方向に並べて開
口させ、前記シリンダヘツドの側面に各吸気ポー
トへ通じる２個の吸気通路を有する吸気管を接続
し、その接続部における２個の吸気通路の断面形
状を全体として横長の略小判形とし、その中央部
に堅方向の隔壁を設けて２個の吸気通路を区画し
てなり、この隔壁の吸気通路の内壁となる壁面を
略平面に形成したものである。
An engine intake passage device according to the present invention has two intake passages per cylinder, and one intake passage is closed by a butterfly-shaped closing valve during low-load operation of the engine. In,
Two intake ports connected to the combustion chamber via intake valves are opened side by side in the horizontal direction on the side of the cylinder head, and an intake pipe having two intake passages leading to each intake port is installed on the side of the cylinder head. The cross-sectional shape of the two intake passages at the connecting part is generally oblong and oblong, and a partition wall in the rigid direction is provided in the center to partition the two intake passages. The wall surface that becomes the inner wall of the intake passage is formed into a substantially flat surface.
互いに隣合う吸気ポートの断面形状がそれぞれ
略半円形になり、両吸気ポートがその弦の部分を
互いに向い合わせるようにして並設される。
The cross-sectional shapes of the intake ports adjacent to each other are approximately semicircular, and the intake ports are arranged side by side with their chord portions facing each other.
以下、本発明の一実施例を第１図ないし第４図
によつて詳細に説明する。
Hereinafter, one embodiment of the present invention will be explained in detail with reference to FIGS. 1 to 4.
第１図は本発明に係るエンジンの要部を拡大し
て示す断面図、第２図はその一部を破断して示す
平面図、第３図は第２図における−線断面
図、第４図は第３図における−線断面図であ
る。これらの図において、１はエンジン本体で、
シリンダ２、シリンダヘツド３およびピストン４
によつて形成される燃焼室５を有し、この燃焼室
５には２個の吸気弁６，７を通じて高負荷用吸気
通路８と全域用吸気通路９および排気弁１０を通
して排気通路１１とが接続されている。１２は点
火栓、１３は従来公知のツインカム形動弁機構で
あり、したがつて詳細な説明は省略する。１５，
１６は吸気通路８，９のシリンダヘツド３内の部
分をなす吸気ポートであり、そのシリンダヘツド
３側面の開口部には閉塞弁１７を横成するスペー
サ１８と吸気分岐管１９が接続され、その上流端
は図示していないエアクリーナを介して大気中に
通じている。２０は吸気分岐管１９の集合部１９
ａに設けた絞り弁であり、２１は燃料噴射ノズル
である。 FIG. 1 is an enlarged sectional view of the main parts of the engine according to the present invention, FIG. 2 is a partially cutaway plan view, FIG. The figure is a sectional view taken along the - line in FIG. 3. In these figures, 1 is the engine body,
Cylinder 2, cylinder head 3 and piston 4
The combustion chamber 5 has a high-load intake passage 8 through two intake valves 6 and 7, an intake passage 9 for wide area use, and an exhaust passage 11 through an exhaust valve 10. It is connected. Reference numeral 12 is a spark plug, and reference numeral 13 is a conventionally known twin cam type valve mechanism, so a detailed explanation will be omitted. 15,
Reference numeral 16 denotes an intake port that forms a part of the intake passages 8 and 9 inside the cylinder head 3, and a spacer 18 that forms a blockage valve 17 and an intake branch pipe 19 are connected to the opening on the side of the cylinder head 3. The upstream end communicates with the atmosphere via an air cleaner (not shown). 20 is a gathering part 19 of the intake branch pipe 19
21 is a throttle valve provided at a, and 21 is a fuel injection nozzle.
前記閉塞弁１７はスペーサ１８内に隣接する２
気筒で共有する弁軸２２により支持された蝶形の
弁体２３を有している。前記弁軸２２はロツド２
４ａを介して吸気負圧に応動するダイヤフラム２
４により、低負荷時には絞り弁２０の下流に生じ
る高い吸気負圧によつて閉じ、戻しばね２５の作
用により開弁するようになつている。ここで、シ
リンダヘツド側面に開口するポート１５，１６と
スペーサ１８に形成される吸気通路８，９との断
面形状は第３図に示すように、全体として横長の
略小判形をなし、その中央部に堅方向の隔壁２６
を設けた区画したもので、前記閉塞弁１７は隔壁
２６に沿つた直線部を持つ略半円形状に作られて
いる。２７は左右のポート１５，１６を互いに連
通する連通孔である。 The occlusion valve 17 has two adjacent spaces within the spacer 18.
It has a butterfly-shaped valve body 23 supported by a valve shaft 22 shared by the cylinders. The valve stem 22 is a rod 2
Diaphragm 2 responsive to intake negative pressure via 4a
4, when the load is low, the throttle valve 20 is closed by the high intake negative pressure generated downstream of the throttle valve 20, and opened by the action of the return spring 25. Here, the cross-sectional shape of the ports 15, 16 opening on the side surface of the cylinder head and the intake passages 8, 9 formed in the spacer 18 is generally oblong in shape as a whole, as shown in FIG. Rigid partition wall 26
The blockage valve 17 is formed into a substantially semicircular shape with a straight portion along the partition wall 26. Reference numeral 27 denotes a communication hole that communicates the left and right ports 15 and 16 with each other.
次に実施例の作動を説明する。エンジン１が始
動し、絞り弁２０が低開度で運転されると、閉塞
弁１７は吸気負圧によつて閉じられるので、吸気
の全量は全域用吸気通路９のみから高速で燃焼室
５内へ導かれる。エンジン出力を増すべく絞り弁
１７の開度を大きく開くと、吸気は全域用吸気通
路９から高速で燃焼室５へ導かれるが、同時え吸
気負圧の低下が大きい場合は戻しばね２５によつ
て閉塞弁１７も開かれ、吸気は２個の吸気通路
８，９および吸気ポート１５，１６を通して大量
に、かつ高速で燃焼室５内へ流入する。かくて、
全運転域に亘つて高い吸気流速が得られるので、
加速応答性がよく、また、吸気中の燃料の壁面付
着が少ないので、安定な空燃比が得られ経済的な
運転が可能となる。また、従来断面円形であつた
吸気通路を断面略半円形にすることに伴い吸気抵
抗が増え、閉塞弁１７を開いたときのエンジンの
応答性が低下することが懸念されるが、本実施例
で示したように閉塞弁１７をシリンダヘツド３の
近傍に設けることにより閉塞弁１７から吸気弁６
までの通路長が短くなるから、閉塞弁１７を開い
たときのエンジンの応答性が損なわれるようなこ
とはない。 Next, the operation of the embodiment will be explained. When the engine 1 is started and the throttle valve 20 is operated at a low opening degree, the blockage valve 17 is closed by the intake negative pressure, so that the entire amount of intake air flows into the combustion chamber 5 from only the wide area intake passage 9 at high speed. be led to. When the opening of the throttle valve 17 is widened to increase the engine output, intake air is guided from the wide area intake passage 9 to the combustion chamber 5 at high speed. Then, the blocking valve 17 is also opened, and a large amount of intake air flows into the combustion chamber 5 at high speed through the two intake passages 8, 9 and the intake ports 15, 16. Thus,
A high intake flow rate can be obtained over the entire operating range, so
Since the acceleration response is good and there is little adhesion of fuel in the intake air to the wall, a stable air-fuel ratio can be obtained and economical operation is possible. Furthermore, as the intake passage, which had conventionally had a circular cross section, has been changed to a substantially semicircular cross section, there is a concern that intake resistance will increase and the responsiveness of the engine will decrease when the blockage valve 17 is opened. As shown in FIG.
Since the passage length up to the stop valve 17 is shortened, the response of the engine when the blockage valve 17 is opened will not be impaired.
以上説明したように本発明に係るエンジンの吸
気通路装置は、１気筒当たり２個の吸気通路を有
し、一方の吸気通路がエンジンの低負荷運転時に
蝶形の閉塞弁によつて閉塞されるエンジンの吸気
通路装置において、シリンダヘツドの側面に吸気
弁を介して燃焼室へ連らなる２個の吸気ポートを
水平方向に並べて開口させ、前記シリンダヘツド
の側面に各吸気ポートへ通じる２個の吸気通路を
有する吸気管を接続し、その接続部における２個
の吸気通路の断面形状を全体として横長の略小判
形とし、その中央部に堅方向の隔壁を設けて２個
の吸気通路を区画してなり、この隔壁の吸気通路
の内壁となる壁面を略平面に形成したため、互い
に隣合う吸気ポートの断面形状がそれぞれ略半円
形になり、両吸気ポートがその弦の部分を互いに
向い合わせるようにして並設される。したがつ
て、シリンダヘツドの余肉を減らすことができ、
シリンダヘツドの大型化および重量増加を妨ぐこ
とができる。
As explained above, the engine intake passage device according to the present invention has two intake passages per cylinder, and one intake passage is closed by the butterfly-shaped closure valve during low-load operation of the engine. In an engine intake passage device, two intake ports connected to the combustion chamber via intake valves are opened side by side in the horizontal direction on the side of the cylinder head, and two intake ports connected to each intake port are opened on the side of the cylinder head. Intake pipes having intake passages are connected, and the cross-sectional shape of the two intake passages at the connection part is generally oblong and oblong, and a partition wall in the rigid direction is provided in the center to partition the two intake passages. Since the wall surface that becomes the inner wall of the intake passage of this partition is formed into a substantially flat surface, the cross-sectional shapes of the adjacent intake ports are each approximately semicircular, and the chord portions of both intake ports face each other. They are arranged in parallel. Therefore, the excess thickness of the cylinder head can be reduced.
This can prevent the cylinder head from increasing in size and weight.
第１図は本発明に係るエンジンの要部を拡大し
て示す断面図、第２図はその一部を破断して示す
平面図、第３図は第２図における−線断面
図、第４図は第３図における−線断面図であ
る。
８……高負荷用吸気通路、９……全域用吸気通
路、１５，１６……吸気ポート、１７……閉塞
弁、２６……隔壁。
FIG. 1 is an enlarged sectional view of the main parts of the engine according to the present invention, FIG. 2 is a partially cutaway plan view, FIG. The figure is a sectional view taken along the - line in FIG. 3. 8... Intake passage for high load, 9... Intake passage for wide area, 15, 16... Intake port, 17... Blocking valve, 26... Partition wall.
Claims (1)
吸気通路がエンジンの低負荷運転時に蝶形の閉塞
弁によつて閉塞されるエンジンの吸気通路装置に
おいて、シリンダヘツドの側面に吸気弁を介して
燃焼室へ連らなる２個の吸気ポートを水平方向に
並べて開口させ、前記シリンダヘツドの側面に各
吸気ポートへ通じる２個の吸気通路を有する吸気
管を接続し、その接続部における２個の吸気通路
の断面形状を全体として横長の略小判形とし、そ
の中央部に堅方向の隔壁を設けて２個の吸気通路
を区画してなり、この隔壁の吸気通路の内壁とな
る壁面を略平面に形成したことを特徴とするエン
ジンの吸気通路装置。1. In an engine intake passage device that has two intake passages per cylinder, one of which is closed by a butterfly-shaped closing valve during low-load operation of the engine, the intake valve is installed on the side of the cylinder head. Two intake ports connected to the combustion chamber are horizontally arranged and opened through the cylinder head, and an intake pipe having two intake passages leading to each intake port is connected to the side surface of the cylinder head. The overall cross-sectional shape of each intake passage is a horizontally elongated approximately oval shape, and a rigid partition wall is provided in the center to partition the two intake passages, and the wall surface of this partition wall that becomes the inner wall of the intake passage is An engine intake passage device characterized by being formed into a substantially flat surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57018663A JPS58135354A (en) | 1982-02-08 | 1982-02-08 | Intake gas path device for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57018663A JPS58135354A (en) | 1982-02-08 | 1982-02-08 | Intake gas path device for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58135354A JPS58135354A (en) | 1983-08-11 |
| JPH0377379B2 true JPH0377379B2 (en) | 1991-12-10 |
Family
ID=11977848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57018663A Granted JPS58135354A (en) | 1982-02-08 | 1982-02-08 | Intake gas path device for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58135354A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59163166U (en) * | 1983-04-16 | 1984-11-01 | トヨタ自動車株式会社 | intake device |
| JPS61155621A (en) * | 1984-12-27 | 1986-07-15 | Nissan Motor Co Ltd | Intake air control device of spark ignition engine |
| JPH0670371B2 (en) * | 1985-03-30 | 1994-09-07 | ヤマハ発動機株式会社 | Multi-cylinder engine intake system |
| JPH0335852Y2 (en) * | 1985-10-07 | 1991-07-30 | ||
| JPH0681719A (en) * | 1992-08-31 | 1994-03-22 | Hitachi Ltd | Intake device of internal combustion engine |
| USRE37269E1 (en) | 1992-08-31 | 2001-07-10 | Hitachi, Ltd. | Air intake arrangement for internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5569740A (en) * | 1978-11-20 | 1980-05-26 | Mazda Motor Corp | Formation of suction port in composite suction device |
| JPS5544064B2 (en) * | 1971-10-18 | 1980-11-10 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS626252Y2 (en) * | 1978-09-19 | 1987-02-13 |
-
1982
- 1982-02-08 JP JP57018663A patent/JPS58135354A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5544064B2 (en) * | 1971-10-18 | 1980-11-10 | ||
| JPS5569740A (en) * | 1978-11-20 | 1980-05-26 | Mazda Motor Corp | Formation of suction port in composite suction device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58135354A (en) | 1983-08-11 |
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