JPS6018591Y2 - Internal combustion engine intake control device - Google Patents
Internal combustion engine intake control deviceInfo
- Publication number
- JPS6018591Y2 JPS6018591Y2 JP2258280U JP2258280U JPS6018591Y2 JP S6018591 Y2 JPS6018591 Y2 JP S6018591Y2 JP 2258280 U JP2258280 U JP 2258280U JP 2258280 U JP2258280 U JP 2258280U JP S6018591 Y2 JPS6018591 Y2 JP S6018591Y2
- Authority
- JP
- Japan
- Prior art keywords
- intake port
- intake
- control device
- internal combustion
- combustion engine
- 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
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
本考案は内燃機関の吸気制御装置に関し、特に直噴式デ
ィーゼル機関の吸気スワールを機関の運転状態に応じて
自動的に制御できる、内燃機関の吸気制御装置に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake control device for an internal combustion engine, and more particularly to an intake control device for an internal combustion engine that can automatically control the intake swirl of a direct injection diesel engine according to the operating state of the engine.
直噴式ディーゼル機関に於ては混合気形成が吸気のスワ
ールによって左右されるので、機関低速時に於ても充分
な強さのスワールを維持するために吸気ポートとしてス
パイラルポート（へりカルポート）と称する吸気ポート
形状を採用するものが多い。In a direct injection diesel engine, the mixture formation is influenced by the swirl of the intake air, so in order to maintain a sufficiently strong swirl even at low engine speeds, an intake port called a spiral port is used as an intake port. Many of them use a port shape.
この形式の吸気ポートは機関の低速時に於てもシリンダ
ー内にかなりの強さのスワールを生じさせることができ
るが、反面、機関の高速時及び高負荷時にはシリンダー
内のスワールが強すぎるため、燃料の噴射ノズルから噴
射された燃料が、スワール下流の燃料と相互にオーバー
ラツプして局所的に過濃な混合気を生じて不完全燃焼を
起したり、スモーク発生の素因を作るという欠点があっ
た。This type of intake port can generate a fairly strong swirl inside the cylinder even when the engine is running at low speed, but on the other hand, when the engine is running at high speed or under high load, the swirl inside the cylinder is too strong. The disadvantage was that the fuel injected from the injection nozzle mutually overlaps with the fuel downstream of the swirl, creating a locally rich mixture, causing incomplete combustion and creating a predisposition to smoke generation. .
また、高速時に適正なスワールが生ずるよう設計すると
低速域ではスワールが不足するという問題を解決する必
要があるため、従来、スパイラルポートの前記の欠点を
是正するために吸気ポート内にフラッパーを設けること
によって吸気ポート内の空気流速を制御しようとする試
みが提案されているが（実公昭５１−７３６５号公報）
、本考案に於ては吸気ポート内における熱的変動の影響
を考慮して正確に機関の運転状態に対応腰シリンダー内
スワールを制御できる、内燃機関の吸気制御装置を提供
するものである。In addition, if the design is designed to generate appropriate swirl at high speeds, it is necessary to solve the problem of insufficient swirl at low speeds. Conventionally, a flapper has been installed in the intake port to correct the above-mentioned drawbacks of the spiral port. An attempt to control the air flow velocity in the intake port has been proposed by (Japanese Utility Model Publication No. 51-7365).
The present invention provides an intake air control device for an internal combustion engine that can accurately control the swirl in the waist cylinder in accordance with the operating state of the engine by taking into account the influence of thermal fluctuations within the intake port.
以下に添附図を参照して本考案の実施例について説明す
る。Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本考案による吸気制御装置１を備えた吸気ポー
ト２の水平断面図である。FIG. 1 is a horizontal sectional view of an intake port 2 equipped with an intake control device 1 according to the present invention.
吸気制御装置１は、スパイラル式の吸気ポート２の彎曲
部２１（すなわち、垂直下降部２２と水平通路部２３と
の合流部）に対向する内周側壁面２３′に片持式に枢着
された熱応動式可動片１１から戒り、該熱応動式可動片
１１はたとえばバイメタル製であって、吸気ポート２の
水平通路部２３と本行に延在し、止めねじもしくはスポ
ット溶接等の予断によってその基端部を水平通路部２３
の壁面に固定されている。The intake control device 1 is pivotally mounted in a cantilever manner on an inner circumferential side wall surface 23' that faces the curved portion 21 (that is, the confluence portion of the vertically descending portion 22 and the horizontal passage portion 23) of the spiral-type intake port 2. The heat-responsive movable piece 11 is made of, for example, bimetal, extends in line with the horizontal passage 23 of the intake port 2, and has a set screw or spot welding or the like. The proximal end is connected to the horizontal passage section 23 by
is fixed to the wall.
この熱応動式可動片１１の先端は吸気ポート２内の温度
が低い時には図示点線のように吸気ポート２の内周側壁
面２３′から離れており、吸気ポート２内の温度が所定
温度以上になると図示実線のように壁面２３′に密着す
る。When the temperature inside the intake port 2 is low, the tip of this thermally responsive movable piece 11 is separated from the inner wall surface 23' of the intake port 2 as shown by the dotted line, and when the temperature inside the intake port 2 exceeds a predetermined temperature. Then, it comes into close contact with the wall surface 23' as shown by the solid line in the figure.
（３は吸気弁のバルブステムである。(3 is the valve stem of the intake valve.
）従って、吸気ポート２内が比較的低温の時（すなわち
、機関の始動時や低速時及び軽負荷時）には吸気ポート
２の流路断面積は小さくなって吸気ポート２内の空気の
流速が高く、その結果、シリンダ一円スワールの強さは
大きくなるが、吸気ポート２内が高温時（すなわち、機
関の高負荷時やシリンダーヘッドの熱負荷の高い時）に
は吸気ポート２の流路断面積が増大して吸気ポート２内
の流速は減少し、その結果、シリンダ一円スワールの強
さも減少する。) Therefore, when the temperature inside the intake port 2 is relatively low (i.e., when the engine is started, at low speed, or under light load), the cross-sectional area of the flow path of the intake port 2 becomes small, and the flow velocity of the air inside the intake port 2 decreases. As a result, the strength of the cylinder swirl increases, but when the temperature inside the intake port 2 is high (i.e., when the engine is under high load or the cylinder head is under high thermal load), the flow in the intake port 2 is As the passage cross-sectional area increases, the flow velocity within the intake port 2 decreases, and as a result, the strength of the cylinder swirl also decreases.
以上のように本考案によれば、公知のスパイラルポート
の欠点が除かれ、機関の運転状態にか）わらず常に良好
な燃焼を直噴式ディーゼル機関に行わせることのできる
、吸気制御装置が提供される。As described above, the present invention provides an air intake control device that eliminates the drawbacks of the known spiral port and allows a direct injection diesel engine to always perform good combustion regardless of the operating state of the engine. be done.
添附図面は本考案の実施例を示す水平断面図である。
１：吸気制御装置、２：吸気ポート、１１：熱応動式可
動片。The accompanying drawings are horizontal sectional views showing embodiments of the present invention. 1: Intake control device, 2: Intake port, 11: Thermal response type movable piece.
Claims (1)
の内周側壁面に片持式に枢着し、該吸気ポート内の温度
が低い時には該熱応動式可動片の先端が該吸気ポートの
壁面から離れることによって該吸気ポートの流路断面積
を減少させ、該吸気ポート内の温度が高い時には該熱応
動式可動片の先端が該吸気ポートの壁面に密着すること
によって該吸気ポートの流路断面積を拡大させ、これに
より機関の運転状態に応じて吸気のスワールを制御する
ことを特徴とする、内燃機関の吸気制御装置。A thermally-responsive movable piece is cantilever-mounted to the inner circumferential wall surface near the curved portion of the spiral intake port, and when the temperature inside the intake port is low, the tip of the thermally-responsive movable piece moves to the side of the intake port. By moving away from the wall surface, the cross-sectional area of the flow path of the intake port is reduced, and when the temperature inside the intake port is high, the tip of the thermally responsive movable piece comes into close contact with the wall surface of the intake port, thereby reducing the flow of the intake port. An intake control device for an internal combustion engine, which is characterized by expanding a road cross-sectional area and thereby controlling intake swirl according to the operating state of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2258280U JPS6018591Y2 (en) | 1980-02-23 | 1980-02-23 | Internal combustion engine intake control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2258280U JPS6018591Y2 (en) | 1980-02-23 | 1980-02-23 | Internal combustion engine intake control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56124229U JPS56124229U (en) | 1981-09-21 |
| JPS6018591Y2 true JPS6018591Y2 (en) | 1985-06-05 |
Family
ID=29618702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2258280U Expired JPS6018591Y2 (en) | 1980-02-23 | 1980-02-23 | Internal combustion engine intake control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6018591Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5881319U (en) * | 1981-11-30 | 1983-06-02 | 日産ディーゼル工業株式会社 | Diesel engine swirl control device |
| JPS59119020A (en) * | 1982-12-24 | 1984-07-10 | Hino Motors Ltd | Suction port of internal-combustion engine |
| JPS59120718A (en) * | 1982-12-27 | 1984-07-12 | Hino Motors Ltd | Swirl control device |
-
1980
- 1980-02-23 JP JP2258280U patent/JPS6018591Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56124229U (en) | 1981-09-21 |
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