JPH03164523A - Intake device in internal combustion engine - Google Patents

Intake device in internal combustion engine

Info

Publication number
JPH03164523A
JPH03164523A JP1303901A JP30390189A JPH03164523A JP H03164523 A JPH03164523 A JP H03164523A JP 1303901 A JP1303901 A JP 1303901A JP 30390189 A JP30390189 A JP 30390189A JP H03164523 A JPH03164523 A JP H03164523A
Authority
JP
Japan
Prior art keywords
intake port
combustion chamber
intake
bottom face
cylinder head
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
Application number
JP1303901A
Other languages
Japanese (ja)
Other versions
JP2554755B2 (en
Inventor
Ryohei Kusunoki
亮平 楠
Hiroshi Kimura
宏 木村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP1303901A priority Critical patent/JP2554755B2/en
Publication of JPH03164523A publication Critical patent/JPH03164523A/en
Application granted granted Critical
Publication of JP2554755B2 publication Critical patent/JP2554755B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

PURPOSE:To improve vertical intake swirls in a combustion chamber positively by forming the inner bottom face of an intake port into a raised bottom face, and setting the height measure of the raised bottom face to be gradually higher toward an circular opening part to the combustion chamber. CONSTITUTION:A cylinder head 12 is provided with an intake port 14 formed in the downward curved state so as to be opened to one side face of the cylinder head 12 and a combustion chamber 13. A raised bottom face 18 is disposed at the inner bottom face of the intake port 13, along the axial direction, and the cross section of the intake port 14 is formed into a flat shape. The height measure of the raised bottom face 18 is set to be gradually higher toward the circular opening part 14a, to the combustion chamber 13, of the intake port 14. The circular opening part 14a is formed into the approximate shape of a crescentmoon-shaped communicating part 19 communicated directly with the combustion chamber 13. Intake air is thereby induced positively along the ceiling surface 14d of the intake port 14, across the whole crescent moon shaped communicating part 19.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、内燃機関における燃焼室内への吸気に際して
、シリンダヘッドにおける吸気ポートの形状によって、
燃焼室内に吸気スワールを発生するようにした吸気装置
に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a method for intake air into a combustion chamber of an internal combustion engine, depending on the shape of an intake port in a cylinder head.
The present invention relates to an intake device that generates an intake swirl within a combustion chamber.

［従来の技術と発明が解決しようとする課題〕燃焼室内
における吸気混合気の着火・燃焼性を改善することの一
つに、燃焼室内への吸気に際して、シリンダヘッドにお
ける吸気ポートの形状によって、燃焼室内に吸気スワー
ルを発生する方法があり、また、この吸気スワールには
、吸気を燃焼室内においてシリンダボアにおける軸線の
回りに横向きに旋回させるものと、吸気を燃焼室内にお
いてシリンダボアにおける軸線方向に縦向きに旋回させ
るものとがあることは良く知られている。[Prior art and problems to be solved by the invention] One of the ways to improve the ignition and combustibility of the intake air-fuel mixture in the combustion chamber is to improve the ignition and combustibility of the intake air-fuel mixture in the combustion chamber by changing the shape of the intake port in the cylinder head when drawing air into the combustion chamber. There are two ways to generate intake swirl indoors, and these intake swirls include one in which the intake air is swirled horizontally around the axis of the cylinder bore within the combustion chamber, and one in which the intake air is swirled vertically in the combustion chamber in the axial direction of the cylinder bore. It is well known that there are devices that rotate.

そして、後者のように、吸気をシリンダボアにおける軸
線方向に縦向きに旋回させるための構成として、第５図
に示すように、シリンダヘッドｌにおける吸気ポート２
を、シリンダヘッド１の側面１ａから燃焼室３に向って
下向きに湾曲した形態に形状にして、吸気を湾曲の外周
部、つまり、吸気ポート２における内面のうち天井面２
ａに沿って流れるようにすることにより、燃焼室３内に
、吸気を一点鎖線の矢印Ａで示すように、シリンダボア
４における軸線４ａ方向に紺向きに旋回させるように、
換言すると、縦向きの吸気スワールが発生するように構
成している。As shown in FIG. 5, an intake port 2 in the cylinder head l is used as a configuration for vertically turning the intake air in the axial direction in the cylinder bore.
is curved downward from the side surface 1a of the cylinder head 1 toward the combustion chamber 3, and the intake air is directed to the outer periphery of the curve, that is, to the ceiling surface 2 of the inner surface of the intake port 2.
By making the intake air flow along the direction a, the intake air is caused to swirl in the direction of the axis 4a of the cylinder bore 4 in a dark blue direction, as shown by the dashed-dotted arrow A in the combustion chamber 3.
In other words, it is configured to generate a vertical intake swirl.

しかし、ここにおける吸気ポート２は、吸気弁５が開い
た場合において、当該吸気ポート２がその軸線２ｂの方
向から見たとき燃焼室３に対して直接的に連通ずるのは
、第７図に示すように、吸気ポート２における燃焼室３
に対する円形開口部２Ｃの白濁面２ｄと、吸気弁５の外
周面５ａとの間における符号６で示す三日月状の部分で
あるにも拘わらず、吸気を、この三日月状の連通部６に
対して集中させるような構成にはなっておらず、吸気の
一部が、第５図に点線の矢印Ｂで示すように、前記三日
月状連通部６とは反対側の部分からも燃焼室３内に流入
し、前記三日月状連通部６から流入する吸気の量がそれ
だけ少なくなると共に、−点鎖線の矢印Ａで示す縦向き
の吸気スワールに対して衝突することになるから、燃焼
室３内における一点鎖線の矢印Ａで示す縦向きの吸気ス
ワールが可成り減殺されると云う問題があり、特に、矢
印Ａで示す縦向きの吸気スワールが減殺されると云う傾
向は、吸気量の少ない低負荷域において顕著に現れるの
である。However, when the intake valve 5 is opened, the intake port 2 here directly communicates with the combustion chamber 3 when viewed from the direction of the axis 2b, as shown in FIG. As shown, the combustion chamber 3 at the intake port 2
Despite the crescent-shaped portion indicated by reference numeral 6 between the cloudy surface 2d of the circular opening 2C and the outer circumferential surface 5a of the intake valve 5, the intake air is not directed to this crescent-shaped communication portion 6. It is not configured to concentrate the air, and a portion of the intake air also enters the combustion chamber 3 from the opposite side of the crescent-shaped communication portion 6, as shown by the dotted arrow B in FIG. The amount of intake air that flows in from the crescent-shaped communication portion 6 is reduced accordingly, and it collides with the vertical intake swirl indicated by the dashed arrow A. There is a problem in that the vertical intake swirl shown by the dashed arrow A is considerably reduced.In particular, the vertical intake swirl shown by the arrow A tends to be reduced in the low load range where the intake air amount is small. This is noticeable in the following.

そこで、従来は、前記吸気ポート２の断面積を縮小する
ことによって、吸気ポート２内における吸気の流速を向
上するようにしたり、或いは、例えば特開昭５５−２５
３２号公報等に記載されているように、吸気ポート内に
、当該吸気ポート内における吸気が湾曲の外周部、つま
り、吸気ポート２における内面のうち天井面２ａに沿っ
て流れるように偏流するための偏流板を設けることによ
って、−点鎖線の矢印へで示す紺向きの吸気スワールを
向上するようにしているが、このように吸気ポート２に
おける断面積を縮小したり、或いは、吸気ポート２内に
偏流板を設けることは、吸気の量が多い高負荷域におい
て、吸気ポートに内における流れ抵抗が大きくて、燃焼
室に対する吸気の先議効率が下がるから、内燃機関の出
力が高負荷域において低下すると云う問題があった。Therefore, in the past, the flow velocity of the intake air in the intake port 2 was improved by reducing the cross-sectional area of the intake port 2, or
As described in Publication No. 32, etc., the intake air in the intake port is biased so that it flows along the curved outer periphery, that is, along the ceiling surface 2a of the inner surface of the intake port 2. By providing a deflection plate, the intake swirl in the dark blue direction indicated by the - dotted chain arrow is improved. Providing a deflector plate in a high-load region where the amount of intake air is large increases the flow resistance inside the intake port, reducing the efficiency of intake air relative to the combustion chamber, so the output of the internal combustion engine decreases in a high-load region. Then there was a problem.

本発明は、燃焼室内における縦向きの吸気スワールを、
吸気ポート内における吸気の流れ抵抗の増大を招来する
ことなく、確実に向上できるようにした吸気装置を提供
することを目的とするものである。The present invention creates a vertical intake swirl in the combustion chamber.
It is an object of the present invention to provide an intake device that can be reliably improved without causing an increase in the flow resistance of intake air within an intake port.

〔課題を解決するための手段〕[Means to solve the problem]

この目的を達成するため本発明は、シリンダボアを備え
たシリンダブロックの上面におけるシリンダヘッドに、
吸気ポートを、当該シリンダヘッドにおける側面からシ
リンダヘッドの下面における燃焼室に向って下向きの湾
曲状に形成して成る内ｆｆＡ機関において、前記吸気ポ
ートにおける内面のうち湾曲の内側における内底面を、
当該吸気ポートにおける断面の形状を偏平に形成するよ
うに上げ底面に形成し、且つ、この上げ底面の高さ寸法
を、当該吸気ポートの燃焼室に対する円形開口部に向っ
て次第に高くするように構成したものである。To achieve this objective, the present invention provides a cylinder head on the upper surface of a cylinder block with a cylinder bore.
In an internal ffA engine in which an intake port is formed in a downward curved shape from a side surface of the cylinder head toward a combustion chamber on a lower surface of the cylinder head, an inner bottom surface on the inner side of the curve among the inner surfaces of the intake port;
The intake port has a raised bottom surface so as to have a flat cross-sectional shape, and the height of the raised bottom surface is gradually increased toward a circular opening of the intake port with respect to the combustion chamber. This is what I did.

〔発明の作用・効果〕[Action/effect of the invention]

このように構成すると、吸気ポートにおける断面の形状
は、上げ底面の存在によって、吸気ポートの燃焼室に対
する円形開口部のうち当該円形開口部がその軸線の方向
から見たときにおいて燃焼室に対して直接的に連通ずる
三日月状の連通部に近似した形状になり、吸気ポート内
における吸気を、当該吸気ポートの天井面に沿って前記
三日月状連通部の全体にわたって確実に誘導することが
できる一方、前記三日月状の連通部とは反対側の部分よ
り燃焼室内に流入する吸気の量が少なくなるように規制
することができるから、前記従来のように、吸気ポート
の断面積を縮小したり、或いは、吸気ポート内に偏流板
を設けたりすることな（、燃焼室内に、縦向き方向の強
い吸気スワールを発生することができるのである。With this configuration, the shape of the cross section of the intake port is such that, due to the presence of the raised bottom surface, the circular opening of the intake port relative to the combustion chamber is shaped so that the circular opening is relative to the combustion chamber when viewed from the direction of its axis. The shape is similar to a crescent-shaped communication portion that communicates directly with the intake port, and the intake air in the intake port can be reliably guided throughout the crescent-shaped communication portion along the ceiling surface of the intake port. Since the amount of intake air flowing into the combustion chamber can be regulated to be smaller than the portion opposite to the crescent-shaped communication portion, the cross-sectional area of the intake port can be reduced as in the conventional method, or , it is possible to generate a strong vertical intake swirl within the combustion chamber without providing a deflection plate in the intake port.

従って本発明によると、燃焼室内における吸気スワール
による吸気混合気の着火・燃焼性の改善を、高負荷域に
おける充虜効率の低下、延いては、内燃機関の出力が高
負荷域において低下するのを招来することなく、確実に
達成できる効果を有する。Therefore, according to the present invention, the improvement of the ignition and combustibility of the intake air-fuel mixture by the intake swirl in the combustion chamber can be used to reduce the reduction in the filling efficiency in the high load range and, by extension, to reduce the output of the internal combustion engine in the high load range. It has an effect that can be reliably achieved without causing any problems.

〔実施例〕〔Example〕

以下、本発明の実施例を図面について説明すると、図に
おいて符号１０は、シリンダボア１１を備えたシリンダ
ブロックを、符号１２は、該シリンダブロック１０の上
面に締結したシリンダヘッドを各々示し、該シリンダヘ
ッド１２には、その下面に前記シリンダボア１１内に開
口する燃焼室１３が凹み形成されていると共に、吸気ポ
ート１４が、当該シリンダヘッド１２における一側面１
２ａと、前記燃焼室１３とに開口するように下向きに湾
曲状に形成されており、また、この吸気ポート１４にお
ける前記燃焼室１３に対する円形の開口部１４ａには、
当該開口部１４ａを開閉するようにしたボベノｌ−型の
吸気弁１５が設けられている。なお、符号１６は、排気
弁１７を備えた排気ポートを示す。Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 10 indicates a cylinder block having a cylinder bore 11, and reference numeral 12 indicates a cylinder head fastened to the upper surface of the cylinder block 10. A combustion chamber 13 opening into the cylinder bore 11 is recessed in the lower surface of the cylinder head 12 , and an intake port 14 is formed on one side surface 1 of the cylinder head 12 .
2a, and is formed in a downwardly curved shape so as to open into the combustion chamber 13, and the circular opening 14a of the intake port 14 with respect to the combustion chamber 13 has a circular opening 14a.
A Boveno L-type intake valve 15 is provided to open and close the opening 14a. Note that the reference numeral 16 indicates an exhaust port provided with an exhaust valve 17.

そして、吸気ポート１４における内底面１４ｂに、第３
図及び第４図に示すように、上向き凸の円弧状等の適宜
形状に形成した上げ底面１８を、当該吸気ポート１４の
軸線方向に沿って設けることにより、吸気ポート１４に
おける断面の形状を偏平状に形成し、更に、前記上げ底
面１８の高さ寸法Ｈを、前記吸気ポート１４における燃
焼室１３への円形開口部１４ａに向って次第に高くする
ように構成する。Then, on the inner bottom surface 14b of the intake port 14, a third
As shown in FIG. 4, the cross-sectional shape of the intake port 14 is flattened by providing the raised bottom surface 18 formed in an appropriate shape such as an upwardly convex circular arc along the axial direction of the intake port 14. Further, the height H of the raised bottom surface 18 is configured to gradually increase toward the circular opening 14a of the intake port 14 into the combustion chamber 13.

この構成において吸気ポート１４は、吸気弁１５が開い
た場合において、その軸線の方向から見たとき燃焼室１
３に対して、第４図に示すように、吸気ポート１４にお
ける燃焼室１３に対する円形開口部１４ａの内周面１４
Ｃと、吸気弁１５の外周面ｔＳａとの間における符号１
９で示す三日月状の部分において直接的に連通ずる。In this configuration, when the intake valve 15 is opened, the intake port 14 is connected to the combustion chamber 1 when viewed from the direction of its axis.
3, as shown in FIG.
C and the outer circumferential surface tSa of the intake valve 15
It communicates directly with the crescent-shaped part shown by 9.

そこで、前記吸気ポートにおける内底面１４ｂに、上げ
底面１８を、当該吸気ポート１４の軸線方向に沿って設
けることにより、吸気ポート１４における断面の形状を
偏平状に形成し、更に、前記上げ底面１８の高さ寸法Ｈ
を、前記吸気ポート１４における燃焼室１３への円形開
口部１４ａに向って次第に高くするように構成したこと
により吸気ポート１４おける断面の形状は、前記上げ底
面１８の存在によって、前記のように吸気ボー１−１４
における円形開口部１４ａがその軸線の方向から見たと
きにおいて燃焼室１３に対して直接的に連通ずる三日月
状の連通部１９に近似した形状になるから、吸気ポート
１４内をその軸線の方向に流れる吸気を、当該吸気ポー
１−１４における天井面１４ｄに沿って、前記三日月状
連通部１９の全体にわたって確実に誘導することができ
る一方、前記三日月状の連通部１９とは反対側の部分よ
り、点線矢印Ｂで示すように、燃焼室１３内に流入する
吸気の量が少なくなるように規制することができるので
ある。Therefore, by providing the raised bottom surface 18 on the inner bottom surface 14b of the intake port along the axial direction of the intake port 14, the cross-sectional shape of the intake port 14 is formed into a flat shape, and furthermore, the raised bottom surface 18 height dimension H
is configured to be gradually raised toward the circular opening 14a of the intake port 14 into the combustion chamber 13.The shape of the cross section of the intake port 14 is changed by the presence of the raised bottom surface 18, as described above. Bow 1-14
The circular opening 14a has a shape similar to a crescent-shaped communication part 19 that directly communicates with the combustion chamber 13 when viewed from the direction of its axis, so the inside of the intake port 14 can be viewed from the direction of its axis. While the flowing intake air can be reliably guided throughout the crescent-shaped communication portion 19 along the ceiling surface 14d of the intake port 1-14, As shown by the dotted arrow B, the amount of intake air flowing into the combustion chamber 13 can be regulated to be small.

すなわち、点線矢印Ｂのように流入する吸気の量を少な
（規制した状態のもとで、前記三日月状連通部１９から
、−点鎖線矢印Ａのように流入する吸気の量を大幅に増
大することができるから、燃焼室１３内に縦向きの強い
吸気スワールを発生することができるのである。That is, while the amount of intake air flowing in as shown by the dotted line arrow B is reduced (regulated), the amount of intake air flowing in from the crescent-shaped communication portion 19 as shown in the dashed line arrow A is significantly increased. Therefore, a strong vertical intake swirl can be generated within the combustion chamber 13.

なお、前記実施例は、一つの燃焼室１３に一つの吸気弁
１５を設け、この一つの吸気弁に対する吸気ポート１４
に対して通用した場合を示したが、本発明は、これに限
らず、一つの燃焼室１３に設けた二つの吸気弁に二股に
分岐するように構成した吸気ポートに対しても通用でき
ることは云うまでもない。Note that in the above embodiment, one intake valve 15 is provided in one combustion chamber 13, and the intake port 14 for this one intake valve is
However, the present invention is not limited to this, but can also be applied to an intake port configured to branch into two intake valves provided in one combustion chamber 13. Needless to say.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の実施例を示す縦断正面図、第２図は第
１図のＩＩ−ＩＩ視拡大断面図、第３図は第１図の■−
ｍ視拡大断面図、第４図は第１図の■−ＩＶ視拡大断面
図、第５図は従来例を示す縦断正面図、第６図は第５図
のｖ＋−ｖｉ視広拡大断面図第７図は第５図の■−■視
拡大断面図である。 １０・・・・シリンダブロック、１１・・・・シリンダ
ボア、１２・・・・シリンダヘッド、１３・・・・燃焼
室、１４・・・・吸気ポート、１４ａ・・・・吸気ポー
トの燃焼室への開口部、１４ｂ・・・・吸気ポートの内
底面、１４ｄ・・・・吸気ポートの天井面、１５・・・
・吸気弁、１８・・・・円弧状上げ底面。 区FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along line II-II in FIG. 1, and FIG.
Fig. 4 is an enlarged cross-sectional view in the ■-IV view of Fig. 1, Fig. 5 is a vertical front view showing the conventional example, and Fig. 6 is a wide-enlarged cross-sectional view in the v+-vi view of Fig. 5. FIG. 7 is an enlarged sectional view taken along the line 1--2 of FIG. 5. 10...Cylinder block, 11...Cylinder bore, 12...Cylinder head, 13...Combustion chamber, 14...Intake port, 14a...Intake port to combustion chamber opening, 14b...inner bottom surface of the intake port, 14d...ceiling surface of the intake port, 15...
・Intake valve, 18... Arc-shaped raised bottom surface. Ward

Claims (1)

【特許請求の範囲】[Claims] （１）、シリンダボアを備えたシリンダブロックの上面
におけるシリンダヘッドに、吸気ポートを、当該シリン
ダヘッドにおける側面からシリンダヘッドの下面におけ
る燃焼室に向って下向きの湾曲状に形成して成る内燃機
関において、前記吸気ポートにおける内面のうち湾曲の
内側における内底面を、当該吸気ポートにおける断面の
形状を偏平に形成するように上げ底面に形成し、且つ、
この上げ底面の高さ寸法を、当該吸気ポートの燃焼室に
対する円形開口部に向って次第に高くするように構成し
たことを特徴とする内燃機関における吸気装置。(1) An internal combustion engine in which an intake port is formed in a cylinder head on the upper surface of a cylinder block having a cylinder bore in a downward curved shape from the side surface of the cylinder head toward the combustion chamber on the lower surface of the cylinder head, An inner bottom surface on the inside of the curve of the inner surface of the intake port is formed into a raised bottom surface so as to form a flat cross-sectional shape in the intake port, and
An intake device for an internal combustion engine, characterized in that the height of the raised bottom surface is gradually increased toward the circular opening of the intake port into the combustion chamber.
JP1303901A 1989-11-21 1989-11-21 Intake device in internal combustion engine Expired - Fee Related JP2554755B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1303901A JP2554755B2 (en) 1989-11-21 1989-11-21 Intake device in internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1303901A JP2554755B2 (en) 1989-11-21 1989-11-21 Intake device in internal combustion engine

Publications (2)

Publication Number Publication Date
JPH03164523A true JPH03164523A (en) 1991-07-16
JP2554755B2 JP2554755B2 (en) 1996-11-13

Family

ID=17926631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1303901A Expired - Fee Related JP2554755B2 (en) 1989-11-21 1989-11-21 Intake device in internal combustion engine

Country Status (1)

Country Link
JP (1) JP2554755B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999064733A1 (en) * 1998-06-09 1999-12-16 Yanmar Diesel Engine Co., Ltd. Intake port shape of internal combustion engine
FR2889247A3 (en) 2005-07-26 2007-02-02 Renault Sas Tumble or swirl movement type variable aerodynamic generating device for e.g. diesel engine, has cylinder head with ducts, where one duct includes aerodynamic generating part having oval shape or in form of annular section
JP2013096360A (en) * 2011-11-04 2013-05-20 Fuji Heavy Ind Ltd Intake device of engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4322561B2 (en) 2003-06-06 2009-09-02 サンクス株式会社 Multi-optical axis photoelectric switch, its mounting structure, and fixture
JP4290147B2 (en) 2005-06-28 2009-07-01 本田技研工業株式会社 Internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999064733A1 (en) * 1998-06-09 1999-12-16 Yanmar Diesel Engine Co., Ltd. Intake port shape of internal combustion engine
EP1087115A1 (en) * 1998-06-09 2001-03-28 Yanmar Diesel Engine Co. Ltd. Intake port shape of internal combustion engine
EP1087115A4 (en) * 1998-06-09 2001-08-08 Yanmar Diesel Engine Co Intake port shape of internal combustion engine
US6431140B1 (en) 1998-06-09 2002-08-13 Yanmar Diesel Engine Co., Ltd. Intake port shape of internal combustion engine
CN1124403C (en) * 1998-06-09 2003-10-15 洋马柴油机株式会社 Intake port shape of internal combustion engine
FR2889247A3 (en) 2005-07-26 2007-02-02 Renault Sas Tumble or swirl movement type variable aerodynamic generating device for e.g. diesel engine, has cylinder head with ducts, where one duct includes aerodynamic generating part having oval shape or in form of annular section
JP2013096360A (en) * 2011-11-04 2013-05-20 Fuji Heavy Ind Ltd Intake device of engine

Also Published As

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