JPS59165855A - Air suction device for internal-combustion engine - Google Patents
Air suction device for internal-combustion engineInfo
- Publication number
- JPS59165855A JPS59165855A JP58040188A JP4018883A JPS59165855A JP S59165855 A JPS59165855 A JP S59165855A JP 58040188 A JP58040188 A JP 58040188A JP 4018883 A JP4018883 A JP 4018883A JP S59165855 A JPS59165855 A JP S59165855A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- combustion engine
- cylinder head
- intake port
- port
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 238000013459 approach Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
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
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
- F02B31/04—Modifying induction systems for imparting a rotation to the charge in the cylinder by means within the induction channel, e.g. deflectors
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
-
- 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)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は内燃機関の吸気装置、特に吸気管の改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an intake system for an internal combustion engine, particularly an intake pipe.
例えば横型直接噴射式の内燃機関忙おいて、第１図に示
すようにピストン１が嵌合摺動するシリンダ２の前端（
第１図の左側）にシリンダヘッド３が固定され、シリン
ダヘッド３の（１１１面にＤＰＪ口する吸気口４には吸
気管５の後端力；連結されている。For example, in a horizontal direct injection internal combustion engine, as shown in FIG.
A cylinder head 3 is fixed to the left side of FIG. 1, and the rear end of an intake pipe 5 is connected to an intake port 4 having a DPJ port on the 111 side of the cylinder head 3.
吸気管５の本体部分５ａはピストン１の４習動方向Ｃｈ
Ｏｌと平行に前方に延び、本体音（−分５ ａ、
（７） ７；ｉｊは、第２図に示すように、吸気管５の
奉伺【音す分５ａは中心線（ｈＣｈ（第１図）と平行な
中ノロ線ｏ２−０２’ｆｃ有している。そして本体部分
５ａの吸気口４ （）１１先罪１部５ｂは、略直角に屈
曲して吸気口４に連結固定されている。吸気口４は中ｌ
−綜０２−０２と略直角な方向に開口しており、シリン
タ゛ヘッド３内に形成された吸気ポート７は、シリンタ
ー２ （１１１部分７ａが略直角に曲シシリンタ゛２１
ｌｌｔ ＆こ向けてμ８０すると共に、図示しない吸気
）くルブを摺動自在に支持する略筒状のノくルブガイ）
” ８７５を吸気ポート７の前鋪面より部分７ａの開口
側に１句けて突出している。ここで吸気ポート７の形状
＋ｄ、吸９を口４７５）ら流入する空気がノ（ルブガイ
ド８の周円］を−Ｈｐすることによって、シリンダ２内
に形成される燃勿乞なっている。The main body portion 5a of the intake pipe 5 is arranged in the four movement directions Ch of the piston 1.
Extends forward parallel to Ol, main body sound (-min 5 a,
(7) 7; ij is, as shown in Figure 2, the inspection of the intake pipe 5. The intake port 4 ( ) 11 first part 5 b of the main body portion 5 a is bent at a substantially right angle and connected and fixed to the intake port 4 .
- The intake port 7, which opens in a direction substantially perpendicular to the cylinder head 3, is opened in a direction substantially perpendicular to the cylinder head 3.
llt & a substantially cylindrical nokurubugui (not shown) that slidably supports the intake lubricant (not shown).
875 protrudes from the front surface of the intake port 7 toward the opening side of the portion 7a.Here, the shape of the intake port 7 is By subtracting -Hp from the yen], the fuel that is formed inside the cylinder 2 is reduced.
ところが上記従来の構成では、吸気管５の先端部５ｂの
曲率半径Ｒ１、Ｒ２が小さいため、本体部分５ａ内を中
心１ｔａｏｚ−０２と平行な矢印入方向に進入してきた
空気は、内壁面に沿って流れることができず、矢印Ｂの
ように吸気ボート７内を直接的に梶
流れて、補助的な＼回が与えられることなく直接良好な
燃焼が得られない不具合がある。However, in the above-mentioned conventional configuration, since the radii of curvature R1 and R2 of the tip 5b of the intake pipe 5 are small, the air entering the main body portion 5a in the direction of the arrow parallel to the center 1taoz-02 flows along the inner wall surface. The problem is that the fuel cannot flow directly in the intake boat 7 as shown by arrow B, and good combustion cannot be obtained directly without being given an auxiliary blow.
本発明は上記不具合に鑑み、吸気管の形状に工謡体づい
て本発明を説明する。In view of the above problems, the present invention will be explained based on the shape of the intake pipe.
第８図は第２図に相当する横−丁平面部分図である。第
３図において吸気管１０は側方（矢印Ｘ１方向）よシ見
てシリンダ２の中心線０＋Ｏ＋（第１図）と平行な本体
部分１０ａ’ｒ有しており、本体部亦、れている１、更
に本体部分１０ａの中心線０３０３は、第８図で見て（
上方より見て）ピストン１の摺動方向０１＝０１（第１
図）に対し、角度θ１だけ傾いている。即ち本体部分１
０ａば、吸気口４に近づくにつれシリンダヘッド３の側
面よシ離れる方向に配係゛されている。又本体部分１０
ａの吸気口４側先端音ｌＸ１ｏｂは渭らかに犬きく曲げ
られて、吸気口４に連結固定されている。滑らかに湾曲
した先端部１０ｂの湾曲坐径方向内周０Ｉｌｌ壁面の曲
率半仔Ｒ３は犬キく設定されており、その円弧の長さは
長く、本体部分１０ａと吸気口４との間を滑らかに太き
々円弧面で接続している。先端部１０ｈの湾曲半径方向
外Ｊ、′ｄ餉壁面上壁面側壁面と同一中心を有する湾曲
部で形成されておシ、曲率半径Ｒ４ｉ・ま先端部１０ｂ
の通ｆＫｒ幅が本体部分１０ａと同一となるように設定
されている。FIG. 8 is a partial plan view of the alley corresponding to FIG. 2. In Fig. 3, the intake pipe 10 has a main body portion 10a'r that is parallel to the center line 0+O+ (Fig. 1) of the cylinder 2 when viewed from the side (arrow X1 direction); 1. Furthermore, the center line 0303 of the main body portion 10a is shown in FIG.
(viewed from above) sliding direction of piston 1 = 01 (first
It is tilted by an angle θ1 with respect to FIG. That is, main body portion 1
0a, it is arranged in a direction that moves away from the side surface of the cylinder head 3 as it approaches the intake port 4. Also, main body part 10
The end sound lX1ob on the side of the intake port 4 of a is gently bent and fixed to the intake port 4. The curvature R3 of the smoothly curved tip 10b's inner periphery in the radial direction is set to be sharp, and the length of the arc is long, allowing smooth movement between the main body portion 10a and the intake port 4. It is connected to by a thick arc surface. The tip portion 10h is formed of a curved portion having the same center as the outer wall surface, the upper wall surface, and the side wall surface in the radial direction of the tip portion 10h, and the tip portion 10b has a radius of curvature R4i.
The width fKr is set to be the same as that of the main body portion 10a.
エアクリーナ６よシ吸入された空気は本体部分１０ａ内
を中心線Ｏｓ −Ｏｓと平行な矢印Ｃ方向に進み、先端
部１０ｂで吸気口４方向に流れが滑らかに変えられて、
吸気ボート７に入る際には矢印りで示すように吸気口４
の開し］方向と平行な流れとなる。The air sucked through the air cleaner 6 travels inside the main body portion 10a in the direction of arrow C parallel to the center line Os-Os, and the flow is smoothly changed in the direction of the intake port 4 at the tip portion 10b.
When entering the intake boat 7, open the intake port 4 as shown by the arrow.
The flow is parallel to the [opening] direction.
見られた後、部分７ａよりシリンダ２の燃焼室９内に送
り込まれる。燃焼室９内に送入された空気蛤
効率が向上する。After being seen, it is sent into the combustion chamber 9 of the cylinder 2 through the portion 7a. The efficiency of air pumping into the combustion chamber 9 is improved.
第４図、第５図は吸気管１０の詳細図である。4 and 5 are detailed views of the intake pipe 10. FIG.
第５図で明らかなように、本体部分１０ａの前端部は滑
らかに上方に湾曲し、上端部にはわずかに突出するフラ
ンジ部１１を介して嵌合部１２が形成され、エアクリー
ナ６が嵌合固定されるようになっている。一方眼気管１
０の後端部には吸気口４（第３図）の周縁部分に固定さ
れるフランジ１３が一体に形成され、７ランジ１３には
シリンダヘッド３（第３図）に螺合するボルト（図示せ
ず）が嵌合するためのボルト取付孔１４が２箇所に設、
けらｔ７ている。なおフランジ１３部分の開口１５が矩
形なのに対し嵌合部１２のし１ｊ口１６け円形であシ（
第４図）、本体部分１０ａの中間部において吸気管ＩＯ
の断面形状は滑らかに円形から矩形に変化している。As is clear from FIG. 5, the front end of the main body portion 10a is smoothly curved upward, and a fitting portion 12 is formed at the upper end via a slightly protruding flange portion 11, into which the air cleaner 6 is fitted. It is set to be fixed. On the other hand, eye trachea 1
A flange 13 fixed to the peripheral edge of the intake port 4 (Fig. 3) is integrally formed at the rear end of the 0, and a bolt (Fig. There are two bolt mounting holes 14 for fitting (not shown),
Kera t7 is there. Note that while the opening 15 of the flange 13 is rectangular, the opening 1j of the fitting part 12 has a circular shape (16 holes).
(Fig. 4), the intake pipe IO is located in the middle part of the main body portion 10a.
The cross-sectional shape changes smoothly from circular to rectangular.
以上説明したように本発明によると、吸気ｙｔ。As explained above, according to the present invention, the intake yt.
の本体部分１ｏａｙシリングヘツト３の側面に開口する
吸気口４の近傍で、シリンダヘッド３を中心にシリンダ
２と反対倶］に配置し、吸気管１０の吸気［］側矢先端
部０ｂ奮略直角に曲げて上記吸気ＩＴ、］ ４に接続し
た内燃機関の吸気装置ｔにおいて、吸気管１０から吸気
口４に流入する空気が吸気口４のＮｉ１口方向と略平行
に流れるように、吸気管１０の先端部１０ｂの曲率半径
Ｒ３、Ｒ４を大きく設定して、シ旋
リンダヘッド３の吸気ボート７内で所定のζ回流上し、
燃焼効率をアップすることができる利点がある。The main body part 1 oay is located near the intake port 4 that opens on the side of the cylinder head 3, opposite to the cylinder 2 with the cylinder head 3 at the center, and the intake pipe 10 is arranged at a substantially right angle to the side arrow tip 0b. In the intake system t of an internal combustion engine connected to the above-mentioned intake IT, ] 4, the intake pipe 10 is bent so that the air flowing from the intake pipe 10 into the intake port 4 flows approximately parallel to the Ni1 port direction of the intake port 4. The radii of curvature R3 and R4 of the tip portion 10b are set large to allow a predetermined ζ-turn upflow within the intake boat 7 of the cylinder cylinder head 3,
It has the advantage of increasing combustion efficiency.
又上記実施例によると、吸気管１００本体部分１０ａを
角度θｌだけ傾けたことによりエアクリーナ６の側方へ
の張シ出しを防止することができる利点がある。なお角
度θ１を０〜２０°程度に設定し７た場合に、より良好
な吸気特性が得られた。Further, according to the embodiment described above, there is an advantage that the air cleaner 6 can be prevented from protruding to the side by tilting the main body portion 10a of the intake pipe 100 by the angle θl. In addition, when the angle θ1 was set to about 0 to 20 degrees, better intake characteristics were obtained.
第６図、第７図、第８図はそれぞれ別の実施例を示して
いる。第６図は第３図の実施例の角度θｌを０°に設定
した場合である。第７図は吸気管１０の先端部１０ｂの
湾曲半径内周側の曲率半径Ｒ３ｉ外周側の曲率半径Ｒ４
と略同−に設定した場合である。FIG. 6, FIG. 7, and FIG. 8 each show different embodiments. FIG. 6 shows a case where the angle θl of the embodiment shown in FIG. 3 is set to 0°. FIG. 7 shows the radius of curvature R3 on the inner circumferential side of the tip portion 10b of the intake pipe 10, and the radius of curvature R4 on the outer circumferential side.
This is the case where the settings are approximately the same as -.
そして第８図は角度θＩ（第３図）をθ°とし、半径Ｒ
３を半径Ｒ４と略同−に設定した場合である。これらの
実施例の場合も先端部１０ｂが大きく滑らかに湾曲して
いるので、第３図の実施例と同様の効果が得られる。In Fig. 8, the angle θI (Fig. 3) is θ°, and the radius R
3 is set to be approximately the same as the radius R4. In these embodiments as well, since the tip portion 10b is largely and smoothly curved, the same effect as in the embodiment shown in FIG. 3 can be obtained.
なお本発明は第１図の横型内燃機関に採用されるばかっ
てなく、例えば縦型内燃機関に採用しても同様の効果が
得られる。又多気筒内燃機関の吸気マニホールドの主吸
気管と吸気口とを連結する枝管（吸気管）に採用するこ
ともできる。Note that the present invention is not only applicable to the horizontal internal combustion engine shown in FIG. 1, but also similar effects can be obtained even if it is applied to, for example, a vertical internal combustion engine. Moreover, it can also be adopted as a branch pipe (intake pipe) connecting a main intake pipe and an intake port of an intake manifold of a multi-cylinder internal combustion engine.
ａτ１図は一般的な横型内燃機関の左側面部分略図、第
２図は従来例を示す第１図の１−１断面部分ｌ￥１、第
３図は本発明による吸気装置の第２図に相当する図、第
４図は吸気管の平面図、第５図は第４図のＶ矢視図、第
６図、第７図、第８図はそれぞれ別の実施例を示す横断
部分平面略図である。
１・・ピストン、２・・シリンダ、３・・シリンダヘッ
ト、４・・・吸気口、７・・吸気ポート、１０・・・吸
気管、１０ａ・・・本体部分、１０ｂ・・・先端部、Ｆ
３、′Ｉ３４・曲率半径
特許出願人 ヤンマーディーゼル株式会社代理人
弁理士 大 森 忠 孝： 。Fig. aτ1 is a schematic view of the left side of a general horizontal internal combustion engine, Fig. 2 is a 1-1 cross section l\1 of Fig. 1 showing a conventional example, and Fig. 3 is a schematic diagram of the intake system according to the present invention. The corresponding figures, FIG. 4 is a plan view of the intake pipe, FIG. 5 is a view taken along the V arrow in FIG. 4, and FIGS. 6, 7, and 8 are schematic cross-sectional plan views showing different embodiments It is. 1... Piston, 2... Cylinder, 3... Cylinder head, 4... Intake port, 7... Intake port, 10... Intake pipe, 10a... Main body part, 10b... Tip part, F
3,'I34・Curvature radius patent applicant Yanmar Diesel Co., Ltd. agent
Patent attorney Tadashi Omori: .
Claims (1)
気口の近傍で、シリンダヘッドを中心にシリンダと反対
側に配置し、吸気管の吸気口側先端部を略直角に曲げて
上記吸気口に接続した内燃機関の吸気装置において、吸
気管から吸気口忙流入する空気が吸気口の開口方向と略
平行に流れるように、吸気管の先端部の曲率半径を大き
く設定して、シリンダヘッドの吸気ポート内で所定の讐
回流が発止するようにしたことを特徴とする内燃機関の
吸気装置。Place the main body of the intake pipe near the intake port that opens on the side of the cylinder head, on the opposite side of the cylinder with the cylinder head in the center, and bend the tip of the intake pipe on the intake port side at a substantially right angle to the intake port. In the intake system of the connected internal combustion engine, the radius of curvature of the tip of the intake pipe is set large so that the air flowing from the intake pipe into the intake port flows approximately parallel to the opening direction of the intake port. An intake system for an internal combustion engine, characterized in that a predetermined recirculation flow is started within a port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58040188A JPS59165855A (en) | 1983-03-10 | 1983-03-10 | Air suction device for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58040188A JPS59165855A (en) | 1983-03-10 | 1983-03-10 | Air suction device for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59165855A true JPS59165855A (en) | 1984-09-19 |
Family
ID=12573798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58040188A Pending JPS59165855A (en) | 1983-03-10 | 1983-03-10 | Air suction device for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59165855A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620058B1 (en) * | 1970-06-19 | 1981-05-11 | ||
| JPS5829155B2 (en) * | 1974-12-26 | 1983-06-21 | 松下電工株式会社 | Mukitoriyoutomakunoatoshiyorihou |
-
1983
- 1983-03-10 JP JP58040188A patent/JPS59165855A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620058B1 (en) * | 1970-06-19 | 1981-05-11 | ||
| JPS5829155B2 (en) * | 1974-12-26 | 1983-06-21 | 松下電工株式会社 | Mukitoriyoutomakunoatoshiyorihou |
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