JPH0791349A - Intake device of engine and manufacture thereof - Google Patents
Intake device of engine and manufacture thereofInfo
- Publication number
- JPH0791349A JPH0791349A JP5234543A JP23454393A JPH0791349A JP H0791349 A JPH0791349 A JP H0791349A JP 5234543 A JP5234543 A JP 5234543A JP 23454393 A JP23454393 A JP 23454393A JP H0791349 A JPH0791349 A JP H0791349A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- injection valve
- partition wall
- fuel
- wall member
- 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.)
- Withdrawn
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、複数の吸気通路に対
し吸気通路間に配置した燃料噴射弁から燃料を噴射させ
るようにしたエンジンの吸気装置及びその製造方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for an engine in which fuel is injected into a plurality of intake passages from a fuel injection valve arranged between the intake passages, and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】従来より、この種エンジンの吸気装置と
して、例えば実開平４―４７１６５号公報に開示される
ものでは、エンジンのシリンダヘッドに１つの気筒につ
いて２つの吸気ポートを開口させ、その一方をスワール
ポートとする一方、他方に連通する通路にスワール制御
弁を配設し、エンジンの低負荷域等でスワール制御弁を
閉じてスワールポートのみから吸気を気筒内の燃焼室に
供給する場合において、両吸気ポートにそれぞれ連通す
るインジェクタポートを仕切壁で区画した状態で形成し
て、その両インジェクタポートの合流部に燃料噴射弁の
２つの噴孔からそれぞれ燃料を噴射させるようにすると
ともに、仕切壁の上流端位置を両インジェクタポートの
両吸気ポートへの開口の上流端よりも下流側に設定する
ことにより、スワール制御弁の閉弁時に、スワールポー
トに連通するインジェクタポートでの吸気の逆流を防止
し、燃料噴射弁から噴射された燃料がインジェクタポー
ト内に飛散するのを防いで燃料の微粒化を確保するよう
になされている。2. Description of the Related Art Conventionally, as an intake system of this type of engine, for example, one disclosed in Japanese Utility Model Laid-Open No. 4-47165, two intake ports are opened for one cylinder in a cylinder head of the engine, and one of them is opened. When a swirl control valve is installed in the passage communicating with the other side, the swirl control valve is closed in the low load region of the engine, etc., and intake air is supplied from only the swirl port to the combustion chamber in the cylinder. , Injector ports communicating with both intake ports are formed by partition walls, and fuel is injected from the two injection holes of the fuel injection valve into the merging portions of the injector ports. By setting the upstream end position of the wall to the downstream side of the upstream end of the opening to both intake ports of both injector ports, When the control valve is closed, backflow of intake air is prevented at the injector port that communicates with the swirl port, and fuel injected from the fuel injection valve is prevented from scattering into the injector port to ensure atomization of fuel. It is done like this.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記従来のも
のでは、基本的に両吸気ポートがインジェクタポートの
合流部で互いに連通しており、このため、スワール制御
弁の閉弁時にスワールポートから閉じ状態の吸気ポート
に吸気が流入し、スワールポートでの流速低下により燃
焼室での吸気スワールの強度が低下するという問題があ
る。However, in the above-mentioned conventional device, basically, both intake ports communicate with each other at the confluence portion of the injector ports, and therefore, when the swirl control valve is closed, it is closed from the swirl port. Intake flows into the intake port in the state, and there is a problem that the strength of the intake swirl in the combustion chamber decreases due to a decrease in flow velocity at the swirl port.
【０００４】上記両吸気ポートの連通を阻止するには、
仕切壁を燃料噴射弁に可及的に近付ければよいが、その
場合、シリンダヘッドの一部として仕切壁を鋳造する関
係から、その仕切壁の肉厚が厚くならざるを得ず、燃料
噴射弁から噴射された燃料の多くが仕切壁に直接に付着
して液だれを招くという別の問題が生じる。In order to prevent communication between the two intake ports,
The partition wall should be as close as possible to the fuel injection valve, but in that case, because the partition wall is cast as part of the cylinder head, the wall thickness of the partition wall must be increased and the fuel injection Another problem arises in that much of the fuel injected from the valve directly adheres to the partition wall and causes dripping.
【０００５】本発明は斯かる諸点に鑑みてなされたもの
であり、その目的は、上記仕切壁の構造を改良すること
により、燃料噴射弁からの噴射燃料の仕切壁での液だれ
を招くことなく、その仕切壁を燃料噴射弁に近接配置等
して両吸気通路間の連通を阻止するようにすることにあ
る。The present invention has been made in view of the above points, and an object thereof is to improve the structure of the partition wall to cause dripping of the fuel injected from the fuel injection valve at the partition wall. Instead, the partition wall is arranged close to the fuel injection valve to prevent communication between the intake passages.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成すべ
く、請求項１の発明では、仕切壁を、吸気通路間を区画
するための吸気壁とは別体で形成し、かつその肉厚を吸
気壁よりも薄くすることとした。In order to achieve the above object, in the invention of claim 1, the partition wall is formed separately from the intake wall for partitioning the intake passages, and its wall thickness is increased. Was made thinner than the intake wall.
【０００７】具体的には、この発明では、吸気壁によっ
て区画された少なくとも２つの吸気通路と、上記吸気壁
の所定部位に両吸気通路を連通するように設けられた開
口部と、該開口部に臨むように設けられた燃料噴射弁と
を備えたエンジンの吸気装置が前提である。Specifically, in the present invention, at least two intake passages defined by the intake wall, an opening provided at a predetermined portion of the intake wall so as to connect the intake passages, and the opening. It is premised on the intake system of the engine provided with the fuel injection valve provided so as to face the above.
【０００８】そして、上記燃料噴射弁の吸気下流側の開
口部に、肉厚が上記吸気壁の最小肉厚よりも薄くかつ両
吸気通路を開口部にて仕切る仕切壁部材を吸気壁とは別
体に設けたことを特徴としている。In addition, a partition wall member having a wall thickness smaller than the minimum wall thickness of the intake wall and partitioning both intake passages with the opening is provided in the opening on the intake downstream side of the fuel injection valve, separately from the intake wall. It is characterized by being provided on the body.
【０００９】請求項２の発明では、上記燃料噴射弁は噴
射弁取付孔に収容されて取り付けられる構成とし、この
噴射弁取付孔の一部に上記仕切壁部材の吸気上流側端部
を配置する。According to a second aspect of the present invention, the fuel injection valve is configured to be housed and mounted in an injection valve mounting hole, and the intake upstream side end of the partition wall member is arranged in a part of the injection valve mounting hole. .
【００１０】請求項３の発明では、燃料噴射弁は、各吸
気通路にそれぞれ燃料を噴射させる複数の噴孔を有する
ものとする。また、仕切壁部材は、上記各噴孔から噴射
される燃料噴霧間に位置し、かつ上流側端部のみが各噴
孔からの燃料噴霧に当たるように配置する。According to the third aspect of the invention, the fuel injection valve has a plurality of injection holes for injecting fuel into the respective intake passages. Further, the partition wall member is located between the fuel sprays injected from the respective injection holes, and is arranged such that only the upstream end thereof hits the fuel sprays from the respective injection holes.
【００１１】請求項４の発明では、仕切壁部材の上流側
端部を燃料噴射弁に一体的に結合させる構成とする。According to the invention of claim 4, the upstream end of the partition wall member is integrally connected to the fuel injection valve.
【００１２】請求項５の発明は、上記したエンジンの吸
気装置の製造方法である。すなわち、この発明の方法で
は、吸気壁によって区画された少なくとも２つの吸気通
路と、上記吸気壁の所定部位に上記両吸気通路を連通す
るように設けられた開口部と、上記吸気通路間に上記開
口部と連通するように形成され、燃料噴射弁を取り付け
る噴射弁取付孔とを備えたエンジンの吸気装置を製造す
る場合、まず、肉厚が上記吸気壁の最小厚さよりも薄
く、かつ幅が上記噴射弁取付孔の最小径よりも小さい仕
切壁部材を噴射弁取付孔から開口部に嵌挿して上記吸気
壁に当接させる。しかる後、燃料噴射弁を噴射弁取付孔
に嵌挿して取り付ける。A fifth aspect of the present invention is a method of manufacturing the above-described engine intake device. That is, in the method of the present invention, at least two intake passages defined by the intake wall, an opening provided at a predetermined portion of the intake wall so as to communicate the both intake passages, and the above-mentioned intake passage between the intake passages. When manufacturing an intake system for an engine, which is formed so as to communicate with the opening and has an injection valve mounting hole for mounting a fuel injection valve, first, the wall thickness is thinner than the minimum thickness of the intake wall and the width is A partition wall member having a smaller diameter than the minimum diameter of the injection valve mounting hole is fitted into the opening from the injection valve mounting hole and brought into contact with the intake wall. After that, the fuel injection valve is fitted into the injection valve mounting hole and mounted.
【００１３】[0013]
【作用】上記の構成により、請求項１の発明では、両吸
気通路を連通する開口部において燃料噴射弁の吸気下流
側に両吸気通路を開口部にて仕切る仕切壁部材が設けら
れているので、この仕切壁部材の区画により両吸気通路
間の連通が可及的に抑制される。このため、例えば一方
の吸気通路を閉じ、他方の吸気通路のみから吸気をエン
ジンの気筒内燃焼室に供給して吸気のスワールを生成す
る場合に、閉じられた吸気通路への吸気の流入が抑えら
れ、吸気の流入速度を速くして燃焼室での吸気スワール
の強度を大に確保することができる。With the above construction, in the invention of claim 1, a partition wall member for partitioning both intake passages is provided on the intake downstream side of the fuel injection valve at the opening communicating both intake passages. The partition of the partition wall member suppresses communication between the intake passages as much as possible. Therefore, for example, when one intake passage is closed and intake air is supplied from only the other intake passage to the in-cylinder combustion chamber of the engine to generate swirl of intake air, the inflow of intake air into the closed intake passage is suppressed. Therefore, the inflow speed of the intake air can be increased to secure a large strength of the intake swirl in the combustion chamber.
【００１４】また、そのとき、上記仕切壁部材が吸気壁
とは別体のものであるので、その肉厚を吸気壁よりも薄
くすることは容易となる。その結果、この薄肉の仕切壁
部材に対し燃料噴射弁からの噴射燃料の噴霧が付着し難
くなり、燃料の液だれを防いでその気化／霧化を確保す
ることができる。Further, at this time, since the partition wall member is separate from the intake wall, it becomes easy to make the wall thickness thinner than the intake wall. As a result, it becomes difficult for the spray of fuel injected from the fuel injection valve to adhere to the thin partition wall member, and it is possible to prevent dripping of the fuel and ensure its vaporization / atomization.
【００１５】請求項２の発明では、燃料噴射弁を取り付
けるための噴射弁取付孔の一部に仕切壁部材の吸気上流
側端部が配置されているので、この仕切壁部材の上流側
端部を燃料噴射弁に近接させることができ、両吸気通路
の連通をより一層効果的に抑制することができる。According to the second aspect of the present invention, since the intake upstream end of the partition wall member is disposed in a part of the injection valve mounting hole for mounting the fuel injection valve, the upstream end of the partition wall member. Can be brought close to the fuel injection valve, and communication between both intake passages can be suppressed even more effectively.
【００１６】請求項３の発明では、燃料噴射弁の各噴孔
からの燃料噴霧は、仕切壁部材により分けられた状態で
その両側を進んだ後、各吸気通路に噴射されるが、その
とき、仕切壁部材の上流側端部のみが燃料噴霧に当た
る。すなわち、燃料噴霧の各々は仕切壁部材の上流端の
みに当たるが、その後は仕切壁部材から大きく離れるよ
うに進むので、その燃料が仕切壁部材の側面全体に亘り
付着することはなく、その液だれを防止しながら、仕切
壁部材を燃料噴射弁に近付けることができる。In the invention of claim 3, the fuel spray from each injection hole of the fuel injection valve is injected into each intake passage after advancing on both sides in a state divided by the partition wall member. Only the upstream end of the partition wall member hits the fuel spray. That is, each of the fuel sprays hits only the upstream end of the partition wall member, but after that, it proceeds so as to largely separate from the partition wall member, so that the fuel does not adhere to the entire side surface of the partition wall member and its liquid drips. The partition wall member can be brought close to the fuel injection valve while preventing the above.
【００１７】請求項４の発明では、仕切壁部材の上流側
端部が燃料噴射弁に一体的に結合されているので、上記
請求項２の発明と同様に仕切壁部材の上流側端部を燃料
噴射弁に近接配置できるとともに、仕切壁部材を燃料噴
射弁により固定支持して、その支持が容易となる。In the invention of claim 4, since the upstream end of the partition wall member is integrally connected to the fuel injection valve, the upstream end of the partition wall member is connected to the fuel injection valve in the same manner as in the invention of claim 2. The partition wall member can be disposed close to the fuel injection valve, and the partition wall member can be fixedly supported by the fuel injection valve to facilitate the support.
【００１８】請求項５の発明では、２つの吸気通路を区
画する吸気壁の最小厚さよりも薄い肉厚を有する仕切壁
部材が、上記両吸気通路を連通する開口部に噴射弁取付
孔から嵌挿されて吸気壁に当接される。そのとき、仕切
壁部材の幅は噴射弁取付孔の最小径よりも小さいので、
仕切壁部材は噴射弁取付孔をスムーズに挿通される。し
かる後、その上から燃料噴射弁が噴射弁取付孔に嵌挿さ
れて取り付けられる。こうすることで、吸気壁とは別体
の仕切壁部材の開口部への装着を具体的にかつ容易に行
うことができる。According to the invention of claim 5, a partition wall member having a thickness smaller than the minimum thickness of the intake wall which divides the two intake passages is fitted into the opening communicating with the intake passages from the injection valve mounting hole. It is inserted and brought into contact with the intake wall. At that time, since the width of the partition wall member is smaller than the minimum diameter of the injection valve mounting hole,
The partition wall member is smoothly inserted through the injection valve mounting hole. Thereafter, the fuel injection valve is fitted and inserted into the injection valve mounting hole from above. By doing so, it is possible to specifically and easily attach the partition wall member, which is separate from the intake wall, to the opening.
【００１９】[0019]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。 （実施例１）図１〜図９は本発明の実施例１を示し、１
はエンジンのシリンダヘッドで、気筒Ｃを有する図外の
シリンダブロック上面に組み付けられる。このシリンダ
ヘッド１には、図１１にも示す如く、本発明でいう吸気
通路としてのプライマリ及びセカンダリの２つの吸気ポ
ート２，３が前後方向（図１では図の面と直交する方
向）に並んで形成されている。これら吸気ポート２，３
は何れもシリンダヘッド１の左側面と下面との間を貫通
して互いに略平行に延び、両吸気ポート２，３の間は吸
気壁４により区画されている。Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 1 to 9 show Embodiment 1 of the present invention.
Is a cylinder head of the engine, and is mounted on the upper surface of a cylinder block (not shown) having a cylinder C. As shown in FIG. 11, the cylinder head 1 is provided with two primary and secondary intake ports 2 and 3 as intake passages in the present invention arranged in the front-rear direction (direction orthogonal to the plane of FIG. 1). Is formed by. These intake ports 2, 3
Both penetrate through the left side surface and the lower surface of the cylinder head 1 and extend substantially parallel to each other, and the intake ports 2 and 3 are partitioned by an intake wall 4.
【００２０】上記両吸気ポート２，３は図１１に示す如
く気筒Ｃの左側半部に開口されており、各々の下流端が
吸気弁５，５（図では概略的に示す）により開閉され
る。プライマリ吸気ポート２は、気筒Ｃ内の燃焼室に吸
気のスワールＫを生成する役割を持つもので、本発明の
実施例では全体として略直線状の通路中心線Ｏを有し、
その下流端部（気筒Ｃ内の燃焼室への開口端部）のみが
比較的大きな半径で斜め下方に彎曲されている（尚、図
１では、通常のスワールポート２′の形状及びその通路
中心線Ｏ′を仮想線にて示している）。Both of the intake ports 2 and 3 are opened in the left half of the cylinder C as shown in FIG. 11, and their downstream ends are opened and closed by intake valves 5 and 5 (schematically shown in the figure). . The primary intake port 2 has a role of generating the swirl K of intake air in the combustion chamber in the cylinder C, and has a substantially straight passage center line O in the embodiment of the present invention.
Only the downstream end thereof (opening end to the combustion chamber in the cylinder C) is curved obliquely downward with a relatively large radius (note that in FIG. 1, the shape of the normal swirl port 2'and its passage center). Line O'is shown in phantom).
【００２１】一方、図１１に示すように、セカンダリ吸
気ポート３の上流端に接続される通路３ａには該通路３
ａを開閉するスワール制御弁７が配設されており、この
スワール制御弁７をエンジンの低負荷時に閉弁させるこ
とにより、吸気をプライマリ吸気ポート２のみから気筒
Ｃ内の燃焼室に供給し、燃焼室に図１１で反時計回り方
向の吸気のスワールＫを生成するようにしている。On the other hand, as shown in FIG. 11, in the passage 3a connected to the upstream end of the secondary intake port 3, the passage 3
A swirl control valve 7 that opens and closes a is provided. By closing the swirl control valve 7 when the engine has a low load, intake air is supplied from only the primary intake port 2 to the combustion chamber in the cylinder C, The swirl K of intake air in the counterclockwise direction in FIG. 11 is generated in the combustion chamber.
【００２２】また、シリンダヘッド１の左側面において
両吸気ポート２，３の上流端開口よりも上側には、両吸
気ポート２，３間の吸気壁４に対応する位置に燃料噴射
弁１２を収容して取り付けるための噴射弁取付孔８が形
成され、この取付孔８はその中心線が、両吸気弁５，５
の傘部５ａ，５ａの中心を結ぶ線上でかつ両中心間の中
点を通るように傾斜して配置されている。Further, on the left side surface of the cylinder head 1, the fuel injection valve 12 is housed at a position corresponding to the intake wall 4 between the intake ports 2 and 3 above the upstream end openings of the intake ports 2 and 3. Is formed with an injection valve mounting hole 8 whose center line is defined by the intake valves 5, 5
Are arranged on a line connecting the centers of the umbrella portions 5a, 5a and inclined so as to pass through the midpoint between the centers.
【００２３】そして、上記両吸気ポート２，３の上流側
上部にはそれぞれ該吸気ポート２，３に連通する噴射ポ
ート９，１０が形成され、これら噴射ポート９，１０は
吸気ポート２，３間の吸気壁４の一部で区画されてい
る。さらに、この両吸気ポート２，３を区画する吸気壁
４には上記両噴射ポート９，１０の隔壁部分に、両吸気
ポート２，３を噴射ポート９，１０を介して連通する開
口部１５が形成され、この開口部１５は長さ方向を上記
噴射弁取付孔８の中心線上に一致せしめた長孔形状のも
ので、その上端部は噴射弁取付孔８の下部に連通されて
いる。Injection ports 9 and 10 communicating with the intake ports 2 and 3 are formed on the upper upstream side of the intake ports 2 and 3, respectively, and these injection ports 9 and 10 are connected between the intake ports 2 and 3. It is partitioned by a part of the intake wall 4. Further, the intake wall 4 which divides the intake ports 2 and 3 has an opening 15 which communicates with the partition walls of the injection ports 9 and 10 via the injection ports 9 and 10. The opening 15 is formed in a long hole shape whose lengthwise direction is aligned with the center line of the injection valve mounting hole 8, and its upper end communicates with the lower portion of the injection valve mounting hole 8.
【００２４】上記燃料噴射弁１２の下端には、図示しな
いがプライマリ及びセカンダリの吸気ポート２，３にそ
れぞれ噴射ポート９，１０を介して燃料を噴射させる２
つの噴孔が前後方向に並んで形成されており、この各噴
孔から噴射される燃料噴霧Ｆの方向は、それぞれ吸気ポ
ート２，３下流端の各吸気弁５における傘部５ａ背面の
中心に向かうように設定されている。At the lower end of the fuel injection valve 12, although not shown, fuel is injected into primary and secondary intake ports 2 and 3 through injection ports 9 and 10, respectively 2
Two injection holes are formed side by side in the front-rear direction, and the direction of the fuel spray F injected from each injection hole is in the center of the back surface of the umbrella portion 5a of each intake valve 5 at the downstream ends of the intake ports 2 and 3. It is set to go.
【００２５】尚、上記噴射弁取付孔８の中間部には燃料
噴射弁１２との間を気密シールするシール部材１６が配
設され、そのシール部材１６下側の取付孔８と燃料噴射
弁１２との間には噴孔に連通する間隙１７が形成されて
いる。また、シリンダヘッド１の左側面には上記取付孔
８と燃料噴射弁１２との間の間隙１７に連通する空気導
入ポート１８が形成されており、シリンダヘッド１外部
から空気を空気導入ポート１８及び取付孔８と燃料噴射
弁１２との間の間隙１７を経て噴孔周りに供給して噴射
燃料へのエア混合を行うようにしている。A seal member 16 for hermetically sealing the fuel injection valve 12 is provided in the middle of the injection valve mounting hole 8, and the mounting hole 8 and the fuel injection valve 12 below the seal member 16 are disposed. A gap 17 communicating with the injection hole is formed between and. On the left side surface of the cylinder head 1, an air introduction port 18 communicating with a gap 17 between the mounting hole 8 and the fuel injection valve 12 is formed. The fuel is supplied around the injection hole through a gap 17 between the mounting hole 8 and the fuel injection valve 12 so that the injected fuel is mixed with air.
【００２６】さらに、この発明の特徴として、上記開口
部１５において燃料噴射弁１２の吸気下流側には、シリ
ンダヘッド１の構成部材である吸気壁４とは別体でかつ
両吸気ポート２，３を開口部１５にて仕切る仕切壁部材
１９が嵌め込まれている。この仕切壁部材１９は、図１
０に示すように開口部１５にそれを閉塞するよう気密状
に嵌挿される板状のもので、肉厚Ｔは上記吸気壁４の最
小肉厚よりも薄くされ、幅Ｗは噴射弁取付孔８の最小径
よりも小さくされている。仕切壁部材１９の吸気上流側
端部１９ａは、噴射弁取付孔８の底部内に嵌合されるリ
ング部２０に嵌挿されて一体に結合されて、該噴射弁取
付孔８の一部に配置されている。Further, as a feature of the present invention, both the intake ports 2 and 3 which are separate from the intake wall 4 which is a constituent member of the cylinder head 1 are provided in the opening 15 on the intake downstream side of the fuel injection valve 12. A partition wall member 19 for partitioning the above with the opening 15 is fitted. This partition wall member 19 is shown in FIG.
As shown in FIG. 0, it is a plate-like member that is airtightly fitted in the opening 15 so as to close it, the wall thickness T is smaller than the minimum wall thickness of the intake wall 4, and the width W is the injection valve mounting hole. It is smaller than the minimum diameter of 8. The intake upstream end 19a of the partition wall member 19 is fitted and integrally joined to the ring portion 20 fitted in the bottom portion of the injection valve mounting hole 8, and is partially connected to the injection valve mounting hole 8. It is arranged.
【００２７】ここで、上記実施例のエンジンの吸気装置
の製造方法について説明すると、まず、シリンダヘッド
１に対し、その左側面の噴射弁取付孔８の底部をドリル
やリーマ等により取付孔８を奥側に延長するように加工
して開口部１５を形成する。尚、図２〜図８ではドリル
加工等によって本来形成される穴部Ｈの範囲を仮想的に
示している。The method for manufacturing the engine intake system of the above embodiment will be described. First, the bottom of the injection valve mounting hole 8 on the left side surface of the cylinder head 1 is formed with a mounting hole 8 by a drill or a reamer. The opening 15 is formed by processing so as to extend to the back side. 2 to 8, the range of the hole portion H originally formed by drilling or the like is virtually shown.
【００２８】次いで、噴射弁取付孔８を経て仕切壁部材
１９を先端側から開口部１５に嵌挿し、その先端部を開
口部１５下側の吸気壁４に当接させるとともに、上流端
側のリング部２０を噴射弁取付孔８の底部に嵌合して仕
切壁部材１９が開口部１５を塞ぐように位置決め固定す
る。Next, the partition wall member 19 is fitted into the opening 15 from the tip end side through the injection valve mounting hole 8, and the tip end is brought into contact with the intake wall 4 below the opening 15 and at the upstream end side. The ring portion 20 is fitted into the bottom portion of the injection valve mounting hole 8 and positioned and fixed so that the partition wall member 19 closes the opening portion 15.
【００２９】その際、仕切壁部材１９の幅Ｗが噴射弁取
付孔８の最小径よりも小さいので、仕切壁部材１９を噴
射弁取付孔８内をスムーズに挿通して開口部１５に装着
することができる。At this time, since the width W of the partition wall member 19 is smaller than the minimum diameter of the injection valve mounting hole 8, the partition wall member 19 is smoothly inserted through the injection valve mounting hole 8 and mounted in the opening 15. be able to.
【００３０】しかる後、その状態で燃料噴射弁１２を上
記噴射弁取付孔８に嵌挿して取り付ければよい。このこ
とによって、吸気壁４とは別体の仕切壁部材１９の開口
部１５への装着を容易に行うことができる。Thereafter, the fuel injection valve 12 may be fitted and mounted in the injection valve mounting hole 8 in that state. As a result, the partition wall member 19 separate from the intake wall 4 can be easily attached to the opening 15.
【００３１】したがって、この実施例においては、エン
ジンの運転時、燃料噴射弁１２の各噴孔から噴射された
燃料噴霧Ｆは、図１〜図９に仮想線にて示すように、噴
射後、他方の噴霧Ｆから徐々に離隔しながら、仕切壁部
材１９ないし吸気壁４によって仕切られた噴射ポート
９，１０を経由して吸気ポート２，３に進み、その下流
端の各吸気弁５における傘部５ａ背面に衝突する。Therefore, in this embodiment, when the engine is in operation, the fuel spray F injected from each injection hole of the fuel injection valve 12 is injected after injection as shown by the phantom line in FIGS. While gradually separating from the other spray F, it advances to the intake ports 2 and 3 via the injection ports 9 and 10 partitioned by the partition wall member 19 or the intake wall 4, and the umbrella in each intake valve 5 at the downstream end thereof. It collides with the back surface of the portion 5a.
【００３２】そして、エンジンが低負荷域にあるとき、
スワール制御弁７が閉弁されてセカンダリ吸気ポート３
が閉じられ、吸気はプライマリ吸気ポート２のみからエ
ンジンの気筒Ｃ内の燃焼室に供給され、燃焼室に吸気の
スワールＫが生成される。When the engine is in the low load range,
The swirl control valve 7 is closed and the secondary intake port 3
Is closed, and the intake air is supplied to the combustion chamber in the cylinder C of the engine only from the primary intake port 2, and the swirl K of the intake air is generated in the combustion chamber.
【００３３】その場合、上記プライマリ及びセカンダリ
の両吸気ポート２，３を連通する開口部１５において燃
料噴射弁１２の吸気下流側に、両吸気ポート２，３を開
口部１５にて仕切る仕切壁部材１９が設けられているの
で、この仕切壁部材１９による区画により両吸気ポート
２，３間の連通が抑制される。しかも、この仕切壁部材
１９の吸気上流側端部１９ａが噴射弁取付孔８の下部内
に嵌挿されているので、この上流側端部１９ａは燃料噴
射弁１２に近接配置されることになり、上記プライマリ
及びセカンダリの両吸気ポート２，３間の連通をより一
層効果的に抑制することができる。これらの結果、上記
閉じられたセカンダリ吸気ポート３へプライマリ吸気ポ
ート２から吸気が流入するのを規制でき、プライマリ吸
気ポート２での吸気流量を大きく保って吸気スワールＫ
の強度を大にすることができる。In this case, a partition wall member for partitioning both intake ports 2 and 3 by the opening 15 on the intake downstream side of the fuel injection valve 12 in the opening 15 that communicates both the primary and secondary intake ports 2 and 3. Since the partition wall member 19 is provided, the communication between the intake ports 2 and 3 is suppressed by the partition wall member 19. Moreover, since the intake upstream end 19a of the partition wall member 19 is fitted and inserted into the lower portion of the injection valve mounting hole 8, the upstream end 19a is arranged close to the fuel injection valve 12. The communication between the primary and secondary intake ports 2 and 3 can be suppressed more effectively. As a result, intake air can be restricted from flowing into the closed secondary intake port 3 from the primary intake port 2, and the intake flow rate at the primary intake port 2 can be kept large to allow the intake swirl K to rise.
The strength of can be increased.
【００３４】また、上記プライマリ吸気ポート２は全体
として略直線状の通路中心線Ｏを有し、その下流端部の
みで僅かに斜め下方に彎曲されているので、図１で仮想
線にて示す通常のスワールポート２′では、燃焼室に流
入する吸気がポート２′の半径方向に略均等に拡散する
のに比べ、図１１で実線に示す如く、プライマリ吸気ポ
ート２から燃焼室に流入する吸気の速度成分のうちの円
周方向一方に向かう方向の成分が他方への同成分よりも
大きくなり、この速度成分の差により燃焼室での吸気の
旋回方向の速度が上昇することになり、このことによっ
て吸気スワールＫの強度をさらに増大させることができ
る。The primary intake port 2 has a substantially straight passage centerline O as a whole, and is bent slightly obliquely downward only at its downstream end portion, so that it is shown by an imaginary line in FIG. In the normal swirl port 2 ', the intake air flowing into the combustion chamber diffuses substantially uniformly in the radial direction of the port 2', whereas the intake air flowing into the combustion chamber from the primary intake port 2 as shown by the solid line in FIG. The component of the velocity component in the direction toward one side in the circumferential direction becomes larger than the component to the other in the circumferential direction, and the difference in the velocity component increases the velocity of the intake air in the combustion chamber in the swirling direction. As a result, the strength of the intake swirl K can be further increased.
【００３５】また、上記仕切壁部材１９がシリンダヘッ
ド１の構成部材である吸気壁４とは別体のものであるの
で、その肉厚Ｔを吸気壁４よりも薄くすることが容易と
なる。そして、この仕切壁部材１９が薄肉であるので、
燃料噴射弁１２からの噴射燃料の噴霧Ｆが付着し難くな
り、燃料の液だれを防いでその気化／霧化を確保するこ
とができる。Further, since the partition wall member 19 is separate from the intake wall 4 which is a constituent member of the cylinder head 1, it is easy to make the wall thickness T thereof thinner than the intake wall 4. And since this partition wall member 19 is thin,
The spray F of the fuel injected from the fuel injection valve 12 is less likely to adhere to it, and it is possible to prevent dripping of the fuel and ensure its vaporization / atomization.
【００３６】尚、この実施例では、燃料噴射弁１２は２
つの噴孔を有するものとしているが、１つの噴孔を有す
るものに対しても適用することができる。In this embodiment, the fuel injection valve 12 has two
Although it has one injection hole, it can also be applied to one having one injection hole.
【００３７】（実施例２）図１２〜図１４は本発明の実
施例２を示し（尚、図１〜図１１と同じ部分については
同じ符号を付してその詳細な説明は省略する）、仕切壁
部材１９の上流端位置を変えたものである。(Embodiment 2) FIGS. 12 to 14 show Embodiment 2 of the present invention (note that the same parts as those in FIGS. 1 to 11 are designated by the same reference numerals and detailed description thereof will be omitted). The position of the upstream end of the partition wall member 19 is changed.
【００３８】すなわち、この実施例では、上記実施例１
と同様に、燃料噴射弁１２は、プライマリ及びセカンダ
リの吸気ポート２，３にそれぞれ燃料を噴射させる２つ
の噴孔を有し、仕切壁部材１９は、上記各噴孔から噴射
される燃料噴霧Ｆ，Ｆ間に位置するように配置されてい
る。That is, in this embodiment, the above-mentioned first embodiment is used.
Similarly, the fuel injection valve 12 has two injection holes for respectively injecting fuel into the primary and secondary intake ports 2 and 3, and the partition wall member 19 has the fuel spray F injected from each injection hole. , F between them.
【００３９】そして、実施例１と異なる点として、各噴
孔からの燃料噴霧Ｆが仕切壁部材１９の上流側端部１９
ａのみに掠った状態で当たり、その後に仕切壁部材１９
から離れるように、該仕切壁部材１９の上流側端部１９
ａの位置が設定されている。The difference from the first embodiment is that the fuel spray F from each injection hole has an upstream end 19 of the partition wall member 19.
It hits only a, and then the partition wall member 19
Away from the upstream end 19 of the partition wall member 19.
The position of a is set.
【００４０】したがって、この実施例の場合、燃料噴射
弁１２の噴孔からの燃料噴霧Ｆ，Ｆの各々は、まず、仕
切壁部材１９の上流側端部１９ａのみに当たり、その後
は実施例１と同様に、仕切壁部材１９により分けられた
状態でその両側を進み、各吸気ポート２，３に噴射され
る。すなわち、燃料噴霧Ｆ，Ｆの各々は仕切壁部材１９
の上流側端部１９ａのみに当たるが、その後、仕切壁部
材１９から大きく離れるように進むので、実施例１と同
様に、燃料が仕切壁部材１９の側面全体に亘り付着する
ことはなく、その液だれを防止しつつ、仕切壁部材１９
を燃料噴射弁１２に近付けることができる。Therefore, in the case of this embodiment, each of the fuel sprays F, F from the injection holes of the fuel injection valve 12 first strikes only the upstream end 19a of the partition wall member 19, and then the first embodiment. Similarly, the fuel is injected into each of the intake ports 2 and 3 while advancing on both sides in a state of being divided by the partition wall member 19. That is, each of the fuel sprays F, F has a partition wall member 19
Although it hits only the upstream end portion 19a of the partition wall member, the fuel is not attached to the entire side surface of the partition wall member 19 as in the case of the first embodiment, because the fuel flows from the partition wall member 19 to a large distance. The partition wall member 19 while preventing anyone
Can be brought close to the fuel injection valve 12.
【００４１】（実施例３）図１５及び図１６は実施例３
を示し、上記実施例１，２では仕切壁部材１９をリング
部２０で固定支持するようにしているのに対し、燃料噴
射弁１２に連結固定するようにしている。(Third Embodiment) FIGS. 15 and 16 show a third embodiment.
In the first and second embodiments, the partition wall member 19 is fixedly supported by the ring portion 20, whereas the partition wall member 19 is fixedly connected to the fuel injection valve 12.
【００４２】すなわち、この実施例では、燃料噴射弁１
２の下部周りに円筒状の保持部材２２が一体的に取り付
けられ、この保持部材２２の内部に仕切壁部材１９の上
流側端部１９ａが嵌挿されて一体に結合されている。That is, in this embodiment, the fuel injection valve 1
A cylindrical holding member 22 is integrally attached around the lower part of 2, and the upstream end 19a of the partition wall member 19 is inserted into the inside of the holding member 22 and integrally joined.
【００４３】この実施例の場合、仕切壁部材１９の上流
側端部１９ａが燃料噴射弁１２に保持部材２２を介して
一体的に結合されているので、上記各実施例と同様に仕
切壁部材１９の上流側端部１９ａを燃料噴射弁１２に近
接配置できる。加えて、仕切壁部材１９が燃料噴射弁１
２により固定支持されるので、その支持が容易となる利
点がある。In the case of this embodiment, since the upstream end 19a of the partition wall member 19 is integrally connected to the fuel injection valve 12 via the holding member 22, the partition wall member is the same as each of the above embodiments. The upstream end 19a of 19 can be disposed close to the fuel injection valve 12. In addition, the partition wall member 19 makes the fuel injection valve 1
Since it is fixedly supported by 2, there is an advantage that the support becomes easy.
【００４４】尚、上記実施例では、２つの吸気ポート
２，３を有するエンジンの吸気装置に適用したが、本発
明は、３つ以上の吸気通路を有する吸気装置に対しても
同様に適用することができる。Although the above embodiment is applied to the intake system of an engine having two intake ports 2 and 3, the present invention is similarly applied to an intake system having three or more intake passages. be able to.
【００４５】[0045]
【発明の効果】以上説明した如く、請求項１の発明によ
ると、２つの吸気通路を区画する吸気壁に両吸気通路を
連通する開口部を設けて、この開口部に臨むように燃料
噴射弁を設けるに当たり、開口部において燃料噴射弁の
吸気下流側に、吸気壁の最小肉厚よりも薄くかつ両吸気
通路を開口部にて仕切る仕切壁部材を吸気壁とは別体に
設けたことにより、吸気壁よりも薄肉の仕切壁部材によ
り燃料噴射弁からの噴射燃料を付着し難くして燃料の液
だれを防ぎ、その気化／霧化を確保しながら、仕切壁部
材により開口部での両吸気通路間の連通を抑制でき、例
えば一方の吸気通路を閉じて吸気のスワールを生成する
場合でも、閉じられた吸気通路への吸気の流入を抑え
て、吸気のスワール強度を大に確保することができる。
また、上記仕切壁部材が吸気壁とは別体であるので、そ
の薄肉化を容易に行うことができる。As described above, according to the first aspect of the invention, the intake wall which defines the two intake passages is provided with an opening communicating with the intake passages, and the fuel injection valve is exposed to the openings. In providing the opening, a partition wall member that is thinner than the minimum wall thickness of the intake wall and separates both intake passages by the opening is provided separately from the intake wall on the intake air downstream side of the fuel injection valve in the opening. The partition wall member, which is thinner than the intake wall, makes it difficult for the injected fuel from adhering to the injection fuel from the fuel injection valve to prevent the fuel from dripping and ensuring its vaporization / atomization. It is possible to suppress the communication between the intake passages, and for example, even when closing one of the intake passages to generate an intake air swirl, suppress the inflow of intake air into the closed intake passage to secure a large intake air swirl strength. You can
Further, since the partition wall member is separate from the intake wall, the wall thickness can be easily reduced.
【００４６】請求項２の発明では、燃料噴射弁を取り付
けるための噴射弁取付孔の一部に仕切壁部材の吸気上流
側端部を配置することとした。また、請求項４の発明で
は、仕切壁部材の上流側端部を燃料噴射弁に一体的に結
合した。従って、これら発明によれば、仕切壁部材の上
流側端部を燃料噴射弁にさらに近接させることができ、
両吸気通路の連通をより一層効果的に抑制することがで
きる。特に、請求項４の発明によると、仕切壁部材を燃
料噴射弁により固定支持でき、その支持の容易化を図る
ことができる利点がある。According to the second aspect of the invention, the intake upstream end of the partition wall member is arranged in a part of the injection valve mounting hole for mounting the fuel injection valve. Further, in the invention of claim 4, the upstream end of the partition wall member is integrally connected to the fuel injection valve. Therefore, according to these inventions, the upstream end of the partition wall member can be brought closer to the fuel injection valve,
It is possible to more effectively suppress the communication between both intake passages. Particularly, according to the invention of claim 4, there is an advantage that the partition wall member can be fixedly supported by the fuel injection valve, and the support thereof can be facilitated.
【００４７】請求項３の発明によると、燃料噴射弁が各
吸気通路にそれぞれ燃料を噴射させる複数の噴孔を有す
る場合に、仕切壁部材を各噴孔から噴射される燃料噴霧
間に位置し、かつ上流側端部のみが燃料噴霧に当たるよ
うに配置したので、各噴孔からの燃料噴霧を仕切壁部材
の上流端のみに当て、その後は仕切壁部材から大きく離
れるように進ませることができ、複数の噴孔を有する燃
料噴射弁に対し、燃料が仕切壁部材の側面全体に亘り付
着して液だれが生じるのを防止しつつ、仕切壁部材の燃
料噴射弁への近接配置を達成することができる。According to the third aspect of the present invention, when the fuel injection valve has a plurality of injection holes for injecting fuel into each intake passage, the partition wall member is located between the fuel sprays injected from the injection holes. Moreover, since it is arranged so that only the upstream end hits the fuel spray, it is possible to apply the fuel spray from each injection hole only to the upstream end of the partition wall member and then to move it far away from the partition wall member. For the fuel injection valve having a plurality of injection holes, while preventing the fuel from adhering to the entire side surface of the partition wall member and causing dripping, the partition wall member is arranged close to the fuel injection valve. be able to.
【００４８】請求項５の発明によると、上記したエンジ
ンの吸気装置を製造する場合、２つの吸気通路を区画す
る吸気壁の最小厚さよりも薄い肉厚、及び噴射弁取付孔
の最小径よりも小さい幅を有する仕切壁部材を、両吸気
通路を連通する開口部に噴射弁取付孔から嵌挿して吸気
壁に当接させた後、その上から燃料噴射弁を噴射弁取付
孔に嵌挿して取り付けるので、吸気壁とは別体の仕切壁
部材の開口部への装着を具体的にかつ容易に行うことが
できる。According to the fifth aspect of the present invention, when manufacturing the above-described engine intake device, the thickness is smaller than the minimum thickness of the intake wall that defines the two intake passages, and the minimum diameter of the injection valve mounting hole. A partition wall member having a small width is fitted into the opening communicating with both intake passages from the injection valve mounting hole and brought into contact with the intake wall, and then the fuel injection valve is fitted into the injection valve mounting hole from above. Since it is attached, it is possible to specifically and easily attach the partition wall member, which is separate from the intake wall, to the opening.
【図１】本発明の実施例１を示す縦断面図である。FIG. 1 is a vertical sectional view showing a first embodiment of the present invention.
【図２】図１のII―II線断面図である。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】図１のIII ―III 線断面図である。FIG. 3 is a sectional view taken along line III-III in FIG.
【図４】図１のIV―IV線断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG.
【図５】図１のＶ―Ｖ線断面図である。5 is a sectional view taken along line VV of FIG.
【図６】図１のVI―VI線断面図である。6 is a sectional view taken along line VI-VI of FIG.
【図７】図１のVII ―VII 線断面図である。7 is a sectional view taken along line VII-VII of FIG.
【図８】図１のVIII―VIII線断面図である。8 is a sectional view taken along line VIII-VIII of FIG.
【図９】図１のIX―IX線断面図である。9 is a sectional view taken along line IX-IX in FIG.
【図１０】仕切壁部材の拡大斜視図である。FIG. 10 is an enlarged perspective view of a partition wall member.
【図１１】両吸気ポートの燃焼室への連通状態を模式的
に示す平面図である。FIG. 11 is a plan view schematically showing a communication state of both intake ports with a combustion chamber.
【図１２】実施例２を示す図１相当図である。FIG. 12 is a view corresponding to FIG. 1 showing a second embodiment.
【図１３】図１２のXIII―XIII線断面図である。13 is a sectional view taken along line XIII-XIII in FIG.
【図１４】図１２のXIV ―XIV 線断面図である。14 is a sectional view taken along line XIV-XIV in FIG.
【図１５】実施例３を示す図１相当図である。FIG. 15 is a view corresponding to FIG. 1 showing a third embodiment.
【図１６】図１５のXVI ―XVI 線断面図である。16 is a sectional view taken along line XVI-XVI of FIG.
１ シリンダヘッド Ｃ 気筒 ２，３ 吸気ポート（吸気通路） ４ 吸気壁 ７ スワール制御弁 ８ 噴射弁取付孔 ９，１０ 噴射ポート １２ 燃料噴射弁 １５ 開口部 １９ 仕切壁部材 １９ａ 上流側端部 ２２ 保持部材 Ｆ 燃料噴霧 Ｔ 仕切壁部材の肉厚 Ｗ 仕切壁部材の幅 DESCRIPTION OF SYMBOLS 1 Cylinder head C 2,3 Intake port (intake passage) 4 Intake wall 7 Swirl control valve 8 Injection valve mounting hole 9,10 Injection port 12 Fuel injection valve 15 Opening 19 Partition wall member 19a Upstream end 22 Holding member F Fuel spray T Partition wall member thickness W Partition wall member width
Claims (5)
つの吸気通路と、上記吸気壁の所定部位に上記両吸気通
路を連通するように設けられた開口部と、該開口部に臨
むように設けられた燃料噴射弁とを備えたエンジンの吸
気装置において、 上記燃料噴射弁の吸気下流側の開口部に、肉厚が上記吸
気壁の最小肉厚よりも薄くかつ両吸気通路を開口部にて
仕切る仕切壁部材を吸気壁とは別体に設けたことを特徴
とするエンジンの吸気装置。1. At least two separated by an intake wall
An intake system for an engine, comprising: one intake passage; an opening provided at a predetermined portion of the intake wall so as to connect the two intake passages; and a fuel injection valve provided so as to face the opening. A partition wall member having a wall thickness smaller than the minimum wall thickness of the intake wall and partitioning both intake passages with the openings is provided separately from the intake wall at the intake downstream side opening of the fuel injection valve. An engine intake device characterized by the above.
いて、 燃料噴射弁は噴射弁取付孔に収容されて取り付けられて
おり、 上記噴射弁取付孔の一部に仕切壁部材の吸気上流側端部
が配置されていることを特徴とするエンジンの吸気装
置。2. The intake device for an engine according to claim 1, wherein the fuel injection valve is housed and mounted in an injection valve mounting hole, and an intake upstream side end of the partition wall member is provided in a part of the injection valve mounting hole. An intake device for an engine, which is characterized in that parts are arranged.
いて、 燃料噴射弁は、各吸気通路にそれぞれ燃料を噴射させる
複数の噴孔を有し、 仕切壁部材は、上記各噴孔から噴射される燃料噴霧間に
位置し、かつ上流側端部のみが各噴孔からの燃料噴霧に
当たるように配置されていることを特徴とするエンジン
の吸気装置。3. The engine intake system according to claim 1, wherein the fuel injection valve has a plurality of injection holes for respectively injecting fuel into each intake passage, and the partition wall member is injected from each of the injection holes. An air intake device for an engine, characterized in that it is located between the fuel sprays, and is arranged so that only the upstream end hits the fuel sprays from the respective injection holes.
いて、 仕切壁部材の上流側端部が燃料噴射弁に一体的に結合さ
れていることを特徴とするエンジンの吸気装置。4. The engine intake system according to claim 1, wherein the upstream end of the partition wall member is integrally connected to the fuel injection valve.
つの吸気通路と、上記吸気壁の所定部位に上記両吸気通
路を連通するように設けられた開口部と、上記吸気通路
間に上記開口部と連通するように形成され、燃料噴射弁
を取り付ける噴射弁取付孔とを備えたエンジンの吸気装
置の製造方法であって、 肉厚が上記吸気壁の最小厚さよりも薄く、かつ幅が上記
噴射弁取付孔の最小径よりも小さい仕切壁部材を噴射弁
取付孔から開口部に嵌挿して上記吸気壁に当接させ、そ
の後に燃料噴射弁を噴射弁取付孔に嵌挿して取り付ける
ことを特徴とするエンジンの吸気装置の製造方法。5. At least two separated by an intake wall
An injection passage formed with one intake passage, an opening provided at a predetermined portion of the intake wall so as to connect the intake passages with each other, and an opening provided between the intake passages and the opening. A method for manufacturing an engine intake device having a valve mounting hole, the method including: injecting a partition wall member having a wall thickness smaller than a minimum thickness of the intake wall and a width smaller than a minimum diameter of the injection valve mounting hole. A method for manufacturing an intake device for an engine, comprising fitting the fuel injection valve into the injection valve mounting hole, and then fitting the fuel injection valve into the injection valve mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5234543A JPH0791349A (en) | 1993-09-21 | 1993-09-21 | Intake device of engine and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5234543A JPH0791349A (en) | 1993-09-21 | 1993-09-21 | Intake device of engine and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0791349A true JPH0791349A (en) | 1995-04-04 |
Family
ID=16972678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5234543A Withdrawn JPH0791349A (en) | 1993-09-21 | 1993-09-21 | Intake device of engine and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0791349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021080908A (en) * | 2019-11-22 | 2021-05-27 | 本田技研工業株式会社 | Internal combustion engine |
-
1993
- 1993-09-21 JP JP5234543A patent/JPH0791349A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021080908A (en) * | 2019-11-22 | 2021-05-27 | 本田技研工業株式会社 | Internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20001128 |