JPH025712A - Engine intake-air device - Google Patents
Engine intake-air deviceInfo
- Publication number
- JPH025712A JPH025712A JP63157833A JP15783388A JPH025712A JP H025712 A JPH025712 A JP H025712A JP 63157833 A JP63157833 A JP 63157833A JP 15783388 A JP15783388 A JP 15783388A JP H025712 A JPH025712 A JP H025712A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- engine
- engine intake
- air device
- buffer cavity
- 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.)
- Pending
Links
Classifications
-
- 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
- F02B21/00—Engines characterised by air-storage chambers
-
- 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
- F02B27/008—Resonance charging
-
- 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)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
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に関し、エンジンの全回
転数域で充填効率を高める技術である。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an engine intake device, and is a technology for increasing filling efficiency over the entire engine speed range.
（従来の技術）
エンジンの吸気装置では、吸気弁の閉弁時に吸気通路内
に生じる圧力脈動で吸気抵抗が大きくなるという弊害が
ある。この弊害を回避して充填効率を高めるために、従
来では、吸気管の径や長さを適宜選定して慣性効果と脈
動効果とを併用することが一般に行われている。(Prior Art) Engine intake systems have the disadvantage that intake resistance increases due to pressure pulsations that occur within the intake passage when the intake valve is closed. In order to avoid this problem and increase the filling efficiency, conventionally, the diameter and length of the intake pipe are appropriately selected to use both the inertial effect and the pulsation effect.
（発明が解決しようとする課題）
上記の従来技術では、慣性効果及び脈動効果を利用でき
る回転数域が限られるため、エンジンを特定の回転数域
外で運転したときに、充填効率が低下してエンジン出力
が低下するという問題がある。(Problems to be Solved by the Invention) In the above-mentioned conventional technology, the rotational speed range in which the inertial effect and pulsation effect can be utilized is limited, so when the engine is operated outside the specific rotational speed range, the charging efficiency decreases. There is a problem that the engine output decreases.
本発明は、エンジンの全回転数域で充填効率を高めるこ
とを目的とする。An object of the present invention is to increase charging efficiency over the entire engine speed range.
（課題を解決するための手段）
本発明は、上記目的を達成するために、エンジンの吸気
装置を次のように構成したことを特徴としている。(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized in that an engine intake device is configured as follows.
例えば第１図に示すように、エンジン１のシリンダヘッ
ド４内で吸気ポート７の近傍に吸気サージ緩衝キャビテ
ィＡを形成し、吸気サージ緩衝キャピテイＡを吸気ポー
ト７内の下流側部分７ａに連通させたものである。For example, as shown in FIG. 1, an intake surge buffer cavity A is formed in the cylinder head 4 of the engine 1 near the intake port 7, and the intake surge buffer cavity A is communicated with the downstream portion 7a of the intake port 7. It is something that
（作用） 本発明は次のように作用する。(effect) The invention works as follows.
エンジン１の吸気工程の終期に吸気弁９が閉弁すると、
吸気ポート７の下流側部分７ａの吸気が慣性で圧縮され
、その下流側部分７ａの圧力が上流側部分７ｂの圧力よ
りも高まる。すると、この高圧の吸気が、上記の下流側
部分７ａから吸気サージ緩衝キャビティＡ内へ流入する
ことにより（実線矢印）、上流側部分７ｂを経て吸気管
へと逆流することが抑制される。これにより、従来技術
とは異なり、エンジンｌがどの回転数であっても吸気通
路内の圧力脈動を小さくできる。When the intake valve 9 closes at the end of the intake stroke of the engine 1,
Intake air in the downstream portion 7a of the intake port 7 is compressed by inertia, and the pressure in the downstream portion 7a becomes higher than the pressure in the upstream portion 7b. Then, this high-pressure intake air flows into the intake surge buffer cavity A from the downstream portion 7a (solid arrow), thereby preventing it from flowing back into the intake pipe via the upstream portion 7b. As a result, unlike the prior art, pressure pulsations in the intake passage can be reduced regardless of the rotational speed of the engine l.
一方、次の吸気工程の初期に吸気弁９が開弁じ始めると
、前回の吸気工程で吸気サージ緩衝キャピテイＡ内に蓄
えられていた高圧の吸気が下流側部分７ａを経て燃焼室
５内へ勢いよく流出する（二点鎖線矢印）。On the other hand, when the intake valve 9 begins to open at the beginning of the next intake stroke, the high-pressure intake air stored in the intake surge buffer capacitance A during the previous intake stroke flows into the combustion chamber 5 through the downstream portion 7a. It flows out well (double-dashed arrow).
以上のことから、吸気管から吸気ポート７に亘る吸気の
流れが円滑になり、充填効率が高まる。From the above, the flow of intake air from the intake pipe to the intake port 7 becomes smooth, and the filling efficiency increases.
（発明の効果）
本発明は、上記のように構成され作用することから次の
効果を奏する。(Effects of the Invention) The present invention has the following effects because it is configured and operates as described above.
エンジンは、との回転数であっても吸気抵抗を小さくで
きるうえ、吸気サージ緩衝キャビティ内に蓄積されてい
た吸気を次の吸気工程の初期に燃焼室へ補給できるので
、特定の回転数域外で運転するときでも充填効率が高め
られ、出力が向上する。The engine can reduce intake resistance even at rotational speeds of Even during operation, charging efficiency is increased and output is improved.
（実施例） 以下、本発明の実施例を図面で説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
第１図は、その一実施例を示している。立て形水冷式エ
ンジン１の７リンダ２内にピストン３が上下摺動自在に
挿入され、ピストン３の上面とシリンダへノド４下面と
の間の空間に燃焼室５が形成される。シリンダへノド４
の内部空間に吸気ポート７と排気ポート８とが左右に形
成され、吸気ポート７の下流端部分に吸気弁９が装着さ
れるとともに、排気ポート８の上流端部分に排気弁ｌＯ
が装着される。また両ポート７・８の周囲には冷却水循
環用のヘノドジャケッ１−４ａが形成されている。この
ヘッドジャケット４ａと、シリンダ２のシリンダジャケ
ット２ａとがウォータジャケットを構成している。FIG. 1 shows one embodiment thereof. A piston 3 is inserted vertically and slidably into a cylinder 2 of a vertical water-cooled engine 1, and a combustion chamber 5 is formed in a space between an upper surface of the piston 3 and a lower surface of a cylinder throat 4. Throat to cylinder 4
An intake port 7 and an exhaust port 8 are formed on the left and right in the internal space of the , an intake valve 9 is installed at the downstream end of the intake port 7, and an exhaust valve lO is installed at the upstream end of the exhaust port 8.
is installed. Furthermore, a hemlock jacket 1-4a for circulating cooling water is formed around both ports 7 and 8. This head jacket 4a and the cylinder jacket 2a of the cylinder 2 constitute a water jacket.
上記シリンダヘッド４内で両弁９・１０間の空間に吸気
サージ緩衝キャビティＡが形成される。An intake surge buffer cavity A is formed in the space between the valves 9 and 10 within the cylinder head 4.
この吸気サージ緩衝キャビティＡは吸気ポート７内の下
流側部分７ａに短い連通路１２で連通されている。This intake surge buffer cavity A is communicated with a downstream portion 7a within the intake port 7 through a short communication path 12.
第２図は変形例を示し、上記の吸気サージ緩衝キャビテ
ィＡを、吸気ポート７の近傍で吸気ポート７を取り囲む
ように形成したものである。FIG. 2 shows a modification in which the above-mentioned intake surge buffer cavity A is formed in the vicinity of the intake port 7 so as to surround it.
第１図と第２図は本発明の実施例を示し、第１図はその
一実施例を示すエンジン要部の縦断面図で、第２図は変
形例を示す部分図である。
第１図
■・・・エンジン、 ４・・・シリンダへノド、７
・・・吸気ポート、 ７ａ・・・下流側部分、Ａ・・・
吸気サージ緩衝牛ヤピティ。1 and 2 show an embodiment of the present invention, FIG. 1 is a vertical cross-sectional view of the main part of an engine showing one embodiment, and FIG. 2 is a partial view showing a modified example. Figure 1 ■...Engine, 4...Cylinder throat, 7
...Intake port, 7a...Downstream part, A...
Intake surge buffer cow yapity.
Claims (1)
ート（７）の近傍に吸気サージ緩衝キャビティ（Ａ）を
形成し、吸気サージ緩衝キャビティ（Ａ）を吸気ポート
（７）内の下流側部分（７ａ）に連通させたことを特徴
とするエンジンの吸気装置。1. An intake surge buffer cavity (A) is formed in the cylinder head (4) of the engine (1) near the intake port (7), and the intake surge buffer cavity (A) is formed on the downstream side of the intake port (7). An engine intake device, characterized in that it communicates with the portion (7a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63157833A JPH025712A (en) | 1988-06-24 | 1988-06-24 | Engine intake-air device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63157833A JPH025712A (en) | 1988-06-24 | 1988-06-24 | Engine intake-air device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH025712A true JPH025712A (en) | 1990-01-10 |
Family
ID=15658328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63157833A Pending JPH025712A (en) | 1988-06-24 | 1988-06-24 | Engine intake-air device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH025712A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5768551A (en) * | 1980-10-16 | 1982-04-26 | Honda Motor Co Ltd | Intake device for internal combustion engine |
| JPS57146016A (en) * | 1981-03-06 | 1982-09-09 | Suzuki Motor Co Ltd | Turbulence generator for internal combustion engine |
-
1988
- 1988-06-24 JP JP63157833A patent/JPH025712A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5768551A (en) * | 1980-10-16 | 1982-04-26 | Honda Motor Co Ltd | Intake device for internal combustion engine |
| JPS57146016A (en) * | 1981-03-06 | 1982-09-09 | Suzuki Motor Co Ltd | Turbulence generator for internal combustion engine |
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