JP2000097131A - Setting structure of fuel injection valve - Google Patents
Setting structure of fuel injection valveInfo
- Publication number
- JP2000097131A JP2000097131A JP10267762A JP26776298A JP2000097131A JP 2000097131 A JP2000097131 A JP 2000097131A JP 10267762 A JP10267762 A JP 10267762A JP 26776298 A JP26776298 A JP 26776298A JP 2000097131 A JP2000097131 A JP 2000097131A
- Authority
- JP
- Japan
- Prior art keywords
- fuel injection
- injection valve
- fuel
- funnel
- pipe
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3094—Controlling fuel injection the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/043—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit upstream of an air throttle valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明はエンジンの燃料噴射
弁に関し、特に気筒ごとに2個の燃料噴射弁を備えたエ
ンジンの燃料噴射弁の配置構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection valve for an engine, and more particularly to an arrangement of fuel injection valves for an engine having two fuel injection valves for each cylinder.
【0002】[0002]
【従来の技術】燃料噴射式エンジンにおいて、燃料噴射
弁は通常各気筒のスロットル弁下流側の吸気通路に臨ん
で設けられる。吸気通路の端部にはラッパ状のファンネ
ルが取付けられ、外気を取入れる。このファンネルは通
常エアクリーナを構成する吸気ボックス内に配設され、
エアクリーナエレメントを通して清浄化された外気がフ
ァンネルを通して吸気通路内に吸引される。このような
ファンネルは一般にその長さが長くなると低回転域での
トルク性能が向上し、短いと高回転域でのトルク性能が
向上する。2. Description of the Related Art In a fuel injection engine, a fuel injection valve is usually provided facing an intake passage downstream of a throttle valve of each cylinder. A trumpet-shaped funnel is attached to the end of the intake passage to take in outside air. This funnel is usually arranged in the intake box that constitutes the air cleaner,
Outside air cleaned through the air cleaner element is sucked into the intake passage through the funnel. In general, the longer the length of such a funnel, the better the torque performance in a low rotation range, and the shorter the funnel, the better the torque performance in a high rotation range.
【0003】このような燃料噴射式エンジンにおいて、
出力向上のために、スロットル弁下流側の燃料噴射弁を
第1燃料噴射弁として、さらに各気筒の吸気通路上に第
2燃料噴射弁を設けたエンジンが開発されている。In such a fuel injection type engine,
In order to improve output, an engine has been developed in which a fuel injection valve downstream of a throttle valve is used as a first fuel injection valve and a second fuel injection valve is provided on an intake passage of each cylinder.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、第2燃
料噴射弁を吸気通路を構成する吸気管上に設けると、鋳
造品の吸気管に噴射口を開口しなければならず吸気管自
体の構成が複雑になり新たな鋳造プロセスが必要になる
とともにエンジン周辺の狭いスペース内に燃料噴射弁や
燃料配管を設けなければならずスペース的な制約が大き
い。。However, when the second fuel injection valve is provided on the intake pipe constituting the intake passage, the injection port must be opened in the intake pipe of the cast product, and the configuration of the intake pipe itself is reduced. It becomes complicated and a new casting process is required, and a fuel injection valve and a fuel pipe must be provided in a narrow space around the engine, which greatly restricts space. .
【0005】そこで吸気通路端部のファンネル部分に第
2燃料噴射弁を設ける構成が考えられるが、この場合、
ファンネル開口面に燃料噴射弁を設けると、燃料噴射弁
の外形形状の凹凸や段差による吸気抵抗が問題となる。
また、ファンネルをエアクリーナ内に配置した場合には
燃料配管の貫通によるリークやメンテナンス性が問題と
なる。このため、エアクリーナ内のファンネルに燃料噴
射弁を取付けたエンジンは未だ開発実用化されていな
い。In view of this, a configuration is conceivable in which a second fuel injection valve is provided in a funnel at the end of the intake passage.
When the fuel injection valve is provided on the funnel opening surface, there is a problem of intake resistance due to irregularities and steps of the external shape of the fuel injection valve.
In addition, when the funnel is disposed in the air cleaner, there is a problem of leak and maintenance due to penetration of the fuel pipe. For this reason, an engine in which a fuel injection valve is attached to a funnel in an air cleaner has not yet been developed and put to practical use.
【0006】本発明は上記の点を考慮したものであっ
て、1気筒について第1、第2の2個の燃料噴射弁を備
えたエンジンにおいて、エンジンの吸気管自体には第2
燃料噴射弁を設けず、ファンネル部に適した取付け構造
とした燃料噴射弁の配置構造の提供を目的とする。The present invention has been made in view of the above points. In an engine provided with first and second two fuel injection valves for one cylinder, a second pipe is provided in an intake pipe itself of the engine.
An object of the present invention is to provide an arrangement structure of a fuel injection valve having no fuel injection valve and having a mounting structure suitable for a funnel portion.
【0007】[0007]
【課題を解決するための手段】前記目的を達成するた
め、本発明では、エンジンの各気筒に対応して、スロッ
トル弁下流側の吸気通路に臨んで第1燃料噴射弁が備
り、該吸気通路の上流側端部にファンネルが設けられ、
該吸気通路に臨んで第2燃料噴射弁が備るエンジンの燃
料噴射弁の配置構造において、前記第2燃料噴射弁を前
記ファンネルの開口側端部に設け、該第2燃料噴射弁の
噴射口をファンネルの開口面より内部側に挿入した位置
に配置したことを特徴とする燃料噴射弁の配置構造を提
供する。In order to achieve the above object, according to the present invention, a first fuel injection valve is provided corresponding to each cylinder of an engine to face an intake passage downstream of a throttle valve. A funnel is provided at the upstream end of the passage,
In the arrangement of a fuel injection valve of an engine provided with a second fuel injection valve facing the intake passage, the second fuel injection valve is provided at an open end of the funnel, and the injection port of the second fuel injection valve is provided. The fuel injection valve is disposed at a position inserted into the inside of the funnel from the opening surface of the funnel.
【0008】この構成によれば、第2燃料噴射弁は吸気
通路端部のファンネル開口部に設けられるため、吸気管
自体の鋳造構造を変更することなく第2燃料噴射弁を設
けることができる。また、第2燃料噴射弁の噴射口がフ
ァンネル内部に挿入された位置に配置されるため、噴射
燃料が確実に吸気通路内に吸引されるとともに、燃料タ
ンクの下側のエンジン周辺の狭いスペースにおいて、ト
ルク性能に応じたファンネルの長さに対応して第2燃料
噴射弁を設けることができる。According to this structure, the second fuel injection valve is provided at the funnel opening at the end of the intake passage, so that the second fuel injection valve can be provided without changing the casting structure of the intake pipe itself. Further, since the injection port of the second fuel injection valve is arranged at a position inserted into the funnel, the injected fuel is reliably sucked into the intake passage, and in a narrow space around the engine below the fuel tank. The second fuel injection valve can be provided corresponding to the length of the funnel according to the torque performance.
【0009】好ましい構成例では、前記ファンネルは吸
気ボックス内に設けられたことを特徴としている。In a preferred configuration example, the funnel is provided in an intake box.
【0010】この構成によれば、第2燃料噴射弁は、エ
アクリーナ等の吸気ボックス内に設けたファンネルに臨
んで取付けられ、スペースの有効利用が図られる。[0010] According to this configuration, the second fuel injection valve is mounted facing the funnel provided in the intake box such as an air cleaner, so that the space can be effectively used.
【0011】さらに好ましい構成例では、前記第2燃料
噴射弁の周囲側面を覆う滑らかな外面形状のカバーを設
けたことを特徴としている。In a further preferred configuration example, a smooth outer surface-shaped cover for covering a peripheral side surface of the second fuel injection valve is provided.
【0012】この構成によれば、燃料噴射弁の外形の凹
凸や段差形状が滑らかな外面形状のカバーで覆われるた
め、ファンネル入口部分での吸気抵抗を増加させること
なく出力の向上が図られる。[0012] According to this configuration, since the unevenness and the step shape of the outer shape of the fuel injection valve are covered with the smooth outer surface cover, the output can be improved without increasing the intake resistance at the funnel entrance.
【0013】[0013]
【発明の実施の形態】図1は、本発明の実施の形態に係
る燃料噴射弁配置構造の要部を示す構成図である。エン
ジン1は、例えば4気筒エンジン(1気筒のみ図示)で
あり、各気筒ごとに吸気通路2内にスロットル弁3を備
え、このスロットル弁3を備えたスロットルボディ部分
の下流側の吸気通路2に臨んで第1燃料噴射弁4が設け
られる。吸気通路2の上流側端部にはエアクリーナ5が
設けられる。このエアクリーナ5内に、吸気通路2の端
部に接続されたファンネル6が設けられる。FIG. 1 is a configuration diagram showing a main part of a fuel injection valve arrangement structure according to an embodiment of the present invention. The engine 1 is, for example, a four-cylinder engine (only one cylinder is shown), and is provided with a throttle valve 3 in an intake passage 2 for each cylinder, and is provided in an intake passage 2 downstream of a throttle body portion provided with the throttle valve 3. The first fuel injection valve 4 is provided to face. An air cleaner 5 is provided at an upstream end of the intake passage 2. Inside the air cleaner 5, a funnel 6 connected to the end of the intake passage 2 is provided.
【0014】エアクリーナ5は、上ケース5aと下ケー
ス5bとからなり、上ケース5aに設けたダクト7から
外気を取入れ、エアクリーナエレメント8を通してファ
ンネル6側に供給する。下ケース5bの前側には特に高
出力運転で走行する場合に使用する過給用の空気取入れ
口9が設けられる。この空気取入れ口9は通常時はキャ
ップ10により塞がれている。The air cleaner 5 is composed of an upper case 5a and a lower case 5b, takes in outside air from a duct 7 provided in the upper case 5a, and supplies the air to the funnel 6 through an air cleaner element 8. A supercharging air intake 9 used for traveling particularly in high-power operation is provided on the front side of the lower case 5b. This air intake 9 is normally closed by a cap 10.
【0015】ファンネル6の拡大した開口端部に第2燃
料噴射弁11が設けられる。この第2燃料噴射弁11
は、外形が滑らかな曲面形状のカバー12に覆われた状
態で、その先端の噴射口部分がファンネル6の開口面よ
り内部側に挿入された位置に配置される。カバー12は
燃料噴射弁11の外形に沿ってその周囲側面を覆う形状
であり、小径の噴射口部分がファンネル開口面内に挿入
され、径が大きい上側部分はファンネル開口面より外側
に出ている。より詳しくは、先端側の最も小径部分がフ
ァンネルの基本径部分に入り込み、前記小径部分より大
径部がファンネルの拡径部に対応するように位置する。
このように、燃料噴射弁11の小径の噴射口部分のみを
ファンネル6内部に挿入することにより、ファンネル開
口面を塞ぐ部分を小さくして吸気抵抗の増加を小さく抑
えることができる。A second fuel injection valve 11 is provided at the enlarged open end of the funnel 6. This second fuel injection valve 11
Is disposed at a position where the injection port portion at the tip thereof is inserted inside the opening surface of the funnel 6 in a state of being covered by the cover 12 having a smooth curved surface. The cover 12 is shaped so as to cover the peripheral side surface along the outer shape of the fuel injection valve 11, the small-diameter injection port portion is inserted into the funnel opening surface, and the large-diameter upper portion protrudes outside the funnel opening surface. . More specifically, the smallest diameter portion on the tip side enters the basic diameter portion of the funnel, and the larger diameter portion than the small diameter portion is located so as to correspond to the enlarged diameter portion of the funnel.
In this way, by inserting only the small-diameter injection port portion of the fuel injection valve 11 into the funnel 6, the portion that blocks the funnel opening surface can be reduced, and the increase in intake resistance can be suppressed.
【0016】カバー12は、これを取付けた支持部材
(図示しない)とともに、下ケース5b側から立設した
ボルトやこれが挿通するカラー等からなる支柱(図示し
ない)により支持される。このようなカバー12に各気
筒の第2燃料噴射弁11が装着され、気筒配列方向(図
面に垂直方向)に4個並べて配設される。The cover 12 is supported by a support member (not shown) to which the cover 12 is attached and a support (not shown) made of a bolt or a collar through which the bolt is inserted from the lower case 5b side. The second fuel injection valves 11 of the respective cylinders are mounted on such a cover 12, and four of them are arranged side by side in the cylinder arrangement direction (the direction perpendicular to the drawing).
【0017】エアクリーナ5の下側には、第1燃料噴射
弁4に燃料を供給するための第1燃料パイプ13が各気
筒の第1燃料噴射弁4の配列方向(図面に垂直方向)に
沿って設けられる。同様に、エアクリーナ5内には、第
2燃料噴射弁11に燃料を供給するための第2燃料パイ
プ14が設けられる。Below the air cleaner 5, a first fuel pipe 13 for supplying fuel to the first fuel injection valve 4 is provided along the direction in which the first fuel injection valves 4 of each cylinder are arranged (perpendicular to the drawing). Provided. Similarly, a second fuel pipe 14 for supplying fuel to the second fuel injection valve 11 is provided in the air cleaner 5.
【0018】第1燃料パイプ13の入口側端部には、図
示しない燃料ポンプに接続する燃料供給管15から分岐
または連続する往き管15bが接続され、出口側端部に
燃料の戻り管16bが接続される。A first or second fuel pipe 13 is connected to a fuel supply pipe 15 connected to a fuel pump (not shown) at an inlet end of the first fuel pipe 13, and a fuel return pipe 16b is connected to an outlet end of the first fuel pipe 13. Connected.
【0019】第2燃料パイプ14の入口側端部には、燃
料供給管15から分岐または連続する往き管15aが接
続され、出口側端部に戻り管16aが接続される。この
戻り管16aは、第1燃料パイプ13に接続される。The second fuel pipe 14 has an inlet end connected to a feed pipe 15a branched or continuous from the fuel supply pipe 15, and an outlet end connected to a return pipe 16a. The return pipe 16a is connected to the first fuel pipe 13.
【0020】第2燃料パイプ14に接続する往き管15
aは、図示しないグロメットを介して下ケース5bの側
壁を貫通してエアクリーナ5の内部に配設される。ま
た、第2燃料パイプ14の戻り管16aは、図示しない
グロメットを介して下ケース5bの下壁を貫通してエア
クリーナ5の外部に配設される。このようなグロメット
等のシール部材を介してこれらの往き管15aおよび戻
り管16aがエアクリーナ5の下ケース5bを貫通する
ため、貫通部のシール性は十分に確保される。Outgoing pipe 15 connected to second fuel pipe 14
a is disposed inside the air cleaner 5 through a side wall of the lower case 5b via a grommet (not shown). The return pipe 16a of the second fuel pipe 14 is provided outside the air cleaner 5 through a lower wall of the lower case 5b via a grommet (not shown). Since the going pipe 15a and the returning pipe 16a penetrate the lower case 5b of the air cleaner 5 via the sealing member such as the grommet, the sealing performance of the penetrating portion is sufficiently ensured.
【0021】このような構成の燃料配管経路において、
燃料供給管15を通して図示しない燃料ポンプから送ら
れた燃料は、この燃料供給管15から分岐する各往き管
15b,15aを介して第1燃料パイプ13および第2
燃料パイプ14に供給される。第1燃料パイプ13に供
給された余剰燃料は戻り管16bを通して図示しない燃
料タンクに戻る。第2燃料パイプ14に供給された余剰
燃料は、戻り管16aを通して第1燃料パイプ13に供
給され、その後戻り管16bを通して燃料タンクに戻
る。In the fuel pipe route having such a configuration,
The fuel sent from a fuel pump (not shown) through the fuel supply pipe 15 passes through the first fuel pipe 13 and the second fuel pipe 13 via the respective outgoing pipes 15b and 15a branched from the fuel supply pipe 15.
The fuel is supplied to the fuel pipe 14. Excess fuel supplied to the first fuel pipe 13 returns to a fuel tank (not shown) through a return pipe 16b. The surplus fuel supplied to the second fuel pipe 14 is supplied to the first fuel pipe 13 through the return pipe 16a, and then returns to the fuel tank through the return pipe 16b.
【0022】図2から図12までは、本発明のさらに詳
細な実施形態を示す。各図中、前記図1の各部分に対応
する部分には同じ番号を付してある。図2はエアクリー
ナの断面図、図3はその平面図、図4は図3のA−A部
分の断面図である。2 to 12 show more detailed embodiments of the present invention. In the respective drawings, the portions corresponding to the respective portions in FIG. 1 are denoted by the same reference numerals. FIG. 2 is a cross-sectional view of the air cleaner, FIG. 3 is a plan view thereof, and FIG. 4 is a cross-sectional view taken along a line AA in FIG.
【0023】燃料ポンプ18(図2)に接続された燃料
供給管15は、第1および第2燃料パイプ13,14に
燃料を供給する2本の往き管15b,15aに分岐し、
それぞれジョイント21(図3)を介して各燃料パイプ
13,14に接続される。第2燃料パイプ14に接続さ
れる往き管15aは、グロメット17aを介してエアク
リーナ5の下ケース5bを貫通する。第1燃料パイプ1
3には、各気筒に対応して4個の第1燃料噴射弁4が取
付けられ、その出口側端部はジョイント21(図3)を
介して戻り管16bに接続される。Tは燃料タンクの底
面を示す。エアクリーナ等はこの燃料タンク底面Tの下
側の狭いスペースに配設されている。The fuel supply pipe 15 connected to the fuel pump 18 (FIG. 2) branches into two outgoing pipes 15b and 15a for supplying fuel to the first and second fuel pipes 13 and 14, respectively.
Each is connected to each fuel pipe 13 and 14 via a joint 21 (FIG. 3). The outgoing pipe 15a connected to the second fuel pipe 14 passes through the lower case 5b of the air cleaner 5 via the grommet 17a. 1st fuel pipe 1
3, four first fuel injection valves 4 corresponding to the respective cylinders are mounted, and the outlet side ends thereof are connected to the return pipe 16b via the joint 21 (FIG. 3). T indicates the bottom surface of the fuel tank. An air cleaner or the like is provided in a narrow space below the fuel tank bottom surface T.
【0024】第2燃料パイプ14には、各気筒に対応し
た4個の第2燃料噴射弁11が取付けられ、その出口側
端部はジョイント21を介して戻り管16aに接続され
る。この戻り管16aは、図4に示すように、グロメッ
ト17bを介してエアクリーナ5の下ケース5bを貫通
し、第1燃料パイプ13に接続される。Four second fuel injection valves 11 corresponding to the respective cylinders are attached to the second fuel pipe 14, and the outlet end thereof is connected to a return pipe 16 a via a joint 21. This return pipe 16a penetrates through the lower case 5b of the air cleaner 5 via the grommet 17b and is connected to the first fuel pipe 13 as shown in FIG.
【0025】第2燃料噴射弁11は、カバー12内に装
着され、第2燃料パイプ14と一体成形された支持部材
22(後述の図10,11,12参照)に支持される。
この支持部材22は4本のボルト20およびこのボルト
20が挿通するカラー28からなる支柱により、ファン
ネル下部のフランジに対し固定支持される。各燃料噴射
弁にはコネクタ29(図3)を介して電気配線23が接
続される。4個のファンネルは個々にボルト20’によ
りスロットルボディ2cに固定支持される。The second fuel injection valve 11 is mounted inside the cover 12 and is supported by a support member 22 (see FIGS. 10, 11, and 12 described later) formed integrally with the second fuel pipe 14.
The support member 22 is fixedly supported on a flange below the funnel by a column composed of four bolts 20 and a collar 28 through which the bolts 20 are inserted. Electric wiring 23 is connected to each fuel injection valve via a connector 29 (FIG. 3). The four funnels are individually fixedly supported on the throttle body 2c by bolts 20 '.
【0026】燃料流路を構成する各配管上には各配管部
材を接続するための接続具19a,19b,19cが設
けられる。これらの接続具は、配管を押込むことにより
スナップ式に接続される構成である。各配管は、その位
置を固定保持して、特にエアクリーナへの貫通部分のシ
ール性を確実に保つため、およびポンプから送られる燃
料の圧力損失を小さくするために、剛性の大きい金属パ
イプ(又は剛性の大きい樹脂材料)で構成される。した
がって、特に接続具19a,19bについては、相互に
位置が近いため、一緒に取付け取外しを行う必要があ
り、メンテナンスの作業性等も考慮して各接続具19の
接続の押込み方向は1方向に揃えておくことが望まし
い。On each pipe constituting the fuel flow path, there are provided connectors 19a, 19b and 19c for connecting each pipe member. These connectors are configured to be snap-connected by pushing in a pipe. Each pipe has a rigid metal pipe (or rigid pipe) in order to keep its position fixed, in particular, to ensure the sealing performance of the penetrating portion to the air cleaner, and to reduce the pressure loss of the fuel sent from the pump. Resin material). Therefore, since the positions of the connecting members 19a and 19b are particularly close to each other, it is necessary to attach and remove the connecting members 19a, 19b together. It is desirable to keep them aligned.
【0027】図5はエアクリーナ単体の断面図、図6は
その平面図である。エアクリーナ5の上ケース5aと下
ケース5bは、周縁に沿った合せ面の凹部および凸部を
嵌合させて密封的に結合する嵌め合わせ型式の構成であ
り、ネジ25により相互に固定される。下ケース5bに
は、吸気通路2(図1、図2)のスロットルボディ上端
部を密封的に挿通させるためのシール部材83が装着さ
れる。エアクリーナエレメント8は、図6の斜線で示す
ように、略コ字状に配置され、ネジ24により上ケース
5a側に取付けられる。FIG. 5 is a sectional view of the air cleaner alone, and FIG. 6 is a plan view thereof. The upper case 5a and the lower case 5b of the air cleaner 5 have a fitting type configuration in which the concave and convex portions of the mating surface along the peripheral edge are fitted and hermetically connected. A seal member 83 for hermetically inserting the upper end of the throttle body of the intake passage 2 (FIGS. 1 and 2) is attached to the lower case 5b. The air cleaner element 8 is arranged in a substantially U-shape as shown by hatching in FIG. 6, and is attached to the upper case 5a by screws 24.
【0028】図7は、吸気通路(スロットルボディ)と
第1燃料噴射弁の燃料配管経路の平面図であり、図8は
その側面図、図9は図7のB−B断面図である。内部に
吸気通路2が形成され、スロットル弁3を有するスロッ
トルボディ2cは、その底部に一体形成されたフランジ
部2aを有し、このフランジ部2aを介してエンジン側
に取付けられる。このフランジ部2aに近接して、スロ
ットル弁3の下流側となる位置に燃料噴射弁の保持枠2
bが一体形成され、この保持枠2bに第1燃料噴射弁4
の先端の噴射口部分が装着される。26(図9)は燃料
噴射弁4の電気配線のコネクタ装着部である。FIG. 7 is a plan view of the intake passage (throttle body) and the fuel piping path of the first fuel injection valve, FIG. 8 is a side view thereof, and FIG. 9 is a sectional view taken along the line BB of FIG. An intake passage 2 is formed therein, and a throttle body 2c having a throttle valve 3 has a flange 2a integrally formed on the bottom thereof, and is attached to the engine side via the flange 2a. The fuel injection valve holding frame 2 is located at a position close to the flange 2 a and on the downstream side of the throttle valve 3.
b are integrally formed, and the first fuel injection valve 4
The injection port at the tip of is attached. Reference numeral 26 (FIG. 9) denotes a connector mounting portion for electric wiring of the fuel injection valve 4.
【0029】4個のスロットルボディ2cがエンジンの
4つの気筒(図示しない)に対応して車幅方向に並列し
て設けられ、このスロットルボディ2cに沿って第1燃
料パイプ13が取付けられる。この第1燃料パイプ13
の各スロットルボディ2cの位置に各第1燃料噴射弁4
が取付けられる。この第1燃料パイプ13の途中には、
前述のように、上側の第2燃料パイプからの戻り管16
aが接続される(図8)。Four throttle bodies 2c are provided in parallel in the vehicle width direction corresponding to four cylinders (not shown) of the engine, and a first fuel pipe 13 is mounted along the throttle bodies 2c. This first fuel pipe 13
The first fuel injection valve 4 is located at the position of each throttle body 2c.
Is attached. In the middle of the first fuel pipe 13,
As described above, the return pipe 16 from the upper second fuel pipe
a is connected (FIG. 8).
【0030】図10は第2燃料パイプ14の平面図、図
11はその側面図、図12は図11のC−C部分の断面
図である。第2燃料パイプ14は、4本のアーム状の支
持部材22とともに一体成形される。支持部材22の先
端にはボルト通し孔20aが形成される。第2燃料パイ
プ14は、この支持部材22の孔20aにボルト20
(図2、図3)を通し,カラー28(図2、図3)を介
してスロットルボディの上側のファンネル6(図2)の
上側に支持される。この燃料パイプ14には、各スロッ
トルボディの位置に対応して所定間隔で前述のカバー1
2がネジ27により取付けられ、第2燃料噴射弁11が
装着される。カバー12は、前述のように、滑らかな外
面形状を有し、図12に示すように、電気配線のコネク
タ装着部26を露出させて第2燃料噴射弁11を覆う。FIG. 10 is a plan view of the second fuel pipe 14, FIG. 11 is a side view thereof, and FIG. 12 is a cross-sectional view taken along the line CC of FIG. The second fuel pipe 14 is integrally formed with the four arm-shaped support members 22. A bolt passing hole 20 a is formed at the tip of the support member 22. The second fuel pipe 14 has a bolt 20
(FIGS. 2 and 3), and is supported above the funnel 6 (FIG. 2) on the upper side of the throttle body via a collar 28 (FIGS. 2 and 3). The fuel pipe 14 is provided with the cover 1 at a predetermined interval corresponding to the position of each throttle body.
2 is attached by a screw 27, and the second fuel injection valve 11 is attached. The cover 12 has a smooth outer surface shape as described above, and as shown in FIG. 12, exposes the connector mounting portion 26 of the electric wiring and covers the second fuel injection valve 11.
【0031】ボルト20およびカラー28は、ファンネ
ル同士の間に設けられる。コネクタ装着部26や燃料配
管15a,16a等は第2燃料通路を挟んでフィルター
エレメント8の反対側に配置される。これにより、フィ
ルターエレメント8を通過して各ファンネルへ流入する
吸気の流れの妨げとならない。The bolt 20 and the collar 28 are provided between funnels. The connector mounting portion 26, the fuel pipes 15a, 16a, and the like are disposed on the opposite side of the filter element 8 with the second fuel passage therebetween. This does not hinder the flow of intake air that passes through the filter element 8 and flows into each funnel.
【0032】[0032]
【発明の効果】以上説明したように、本発明では、第2
燃料噴射弁は吸気通路端部のファンネル開口部に設けら
れるため、吸気管自体の鋳造構造を変更することなく第
2燃料噴射弁を設けることができる。また、第2燃料噴
射弁の噴射口がファンネル内部に挿入された位置に配置
されるため、噴射燃料が確実に吸気通路内に吸引される
とともに、エンジン周辺の狭いスペースにおいて、トル
ク性能に応じたファンネルの長さに対応して第2燃料噴
射弁を設けることができる。As described above, according to the present invention, the second
Since the fuel injection valve is provided at the funnel opening at the end of the intake passage, the second fuel injection valve can be provided without changing the casting structure of the intake pipe itself. Further, since the injection port of the second fuel injection valve is disposed at a position inserted into the funnel, the injected fuel is reliably sucked into the intake passage, and the torque performance is reduced in a narrow space around the engine. A second fuel injection valve can be provided corresponding to the length of the funnel.
【0033】この場合、ファンネルをエアクリーナ等の
吸気ボックス内に設けた構成とすれば、スペースの有効
利用が図られる。また、第2燃料噴射弁を滑らかな外形
のカバーで覆えば、吸気抵抗の増加を抑制することがで
きる。In this case, if the funnel is provided in an intake box such as an air cleaner, the space can be effectively used. Further, if the second fuel injection valve is covered with a cover having a smooth outer shape, an increase in intake resistance can be suppressed.
【図1】 本発明の実施形態に係る燃料噴射弁配置構造
の構成図。FIG. 1 is a configuration diagram of a fuel injection valve arrangement structure according to an embodiment of the present invention.
【図2】 本発明構造に係るエアクリーナ部分の断面構
成図。FIG. 2 is a sectional configuration diagram of an air cleaner portion according to the structure of the present invention.
【図3】 図2のエアクリーナの平面図。FIG. 3 is a plan view of the air cleaner of FIG. 2;
【図4】 図3のA−A部分の断面図。FIG. 4 is a sectional view taken along the line AA in FIG. 3;
【図5】 図2の構造のエアクリーナ単体の断面図。FIG. 5 is a sectional view of the air cleaner having the structure of FIG. 2;
【図6】 図5のエアクリーナの平面図。FIG. 6 is a plan view of the air cleaner of FIG. 5;
【図7】 図2の構造のスロットルボディ及び第1燃料
パイプ部分の平面図。FIG. 7 is a plan view of a throttle body and a first fuel pipe portion having the structure of FIG. 2;
【図8】 図7の構造の側面図。FIG. 8 is a side view of the structure of FIG. 7;
【図9】 図7のB−B部分の断面図。FIG. 9 is a sectional view taken along the line BB of FIG. 7;
【図10】 図2の構造の第2燃料パイプ部分の平面
図。FIG. 10 is a plan view of a second fuel pipe portion having the structure of FIG. 2;
【図11】 図10の燃料パイプの側面図。FIG. 11 is a side view of the fuel pipe of FIG. 10;
【図12】 図11のC−C部分の断面図。FIG. 12 is a sectional view taken along the line CC of FIG. 11;
1:エンジン、2:吸気通路、3:スロットル弁、4:
第1燃料噴射弁、5:エアクリーナ、5a:上ケース、
5b:下ケース、6:ファンネル、7:ダクト、8:エ
アクリーナエレメント、9:空気取入れ口、10:キャ
ップ、11:第2燃料噴射弁、12:カバー、13:第
1燃料パイプ、14:第2燃料パイプ、15:燃料供給
管、15a,15b:往き管、16a,16b:戻り
管、17a,17b:グロメット、18:燃料ポンプ、
19:接続具、20:ボルト、21:ジョイント、2
2:支持部材、23:電気配線、24,25,27:ネ
ジ、26:コネクタ保持部、28:カラー、29:コネ
クタ。1: engine, 2: intake passage, 3: throttle valve, 4:
First fuel injection valve, 5: air cleaner, 5a: upper case,
5b: lower case, 6: funnel, 7: duct, 8: air cleaner element, 9: air intake, 10: cap, 11: second fuel injection valve, 12: cover, 13: first fuel pipe, 14: first 2 fuel pipe, 15: fuel supply pipe, 15a, 15b: going pipe, 16a, 16b: return pipe, 17a, 17b: grommet, 18: fuel pump,
19: connector, 20: bolt, 21: joint, 2
2: support member, 23: electric wiring, 24, 25, 27: screw, 26: connector holding part, 28: collar, 29: connector.
Claims (3)
弁下流側の吸気通路に臨んで第1燃料噴射弁が備り、該
吸気通路の上流側端部にファンネルが設けられ、該吸気
通路に臨んで第2燃料噴射弁が備るエンジンの燃料噴射
弁の配置構造において、 前記第2燃料噴射弁を前記ファンネルの開口側端部に設
け、該第2燃料噴射弁の噴射口をファンネルの開口面よ
り内部側に挿入した位置に配置したことを特徴とする燃
料噴射弁の配置構造。A first fuel injection valve is provided corresponding to each cylinder of an engine to face an intake passage downstream of a throttle valve, and a funnel is provided at an upstream end of the intake passage. In the arrangement structure of the fuel injection valve of the engine provided with the second fuel injection valve, the second fuel injection valve is provided at the opening end of the funnel, and the injection port of the second fuel injection valve is An arrangement structure for a fuel injection valve, wherein the fuel injection valve is arranged at a position inserted inside the opening surface.
れたことを特徴とする請求項1に記載の燃料噴射弁の配
置構造。2. The arrangement of claim 1, wherein said funnel is provided in an intake box.
かな外面形状のカバーを設けたことを特徴とする請求項
1または2に記載の燃料噴射弁の配置構造。3. The fuel injection valve arrangement according to claim 1, further comprising a smooth outer cover that covers a peripheral side surface of the second fuel injection valve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10267762A JP2000097131A (en) | 1998-09-22 | 1998-09-22 | Setting structure of fuel injection valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10267762A JP2000097131A (en) | 1998-09-22 | 1998-09-22 | Setting structure of fuel injection valve |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005012348A Division JP4030065B2 (en) | 2005-01-20 | 2005-01-20 | Fuel injection engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2000097131A true JP2000097131A (en) | 2000-04-04 |
Family
ID=17449244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10267762A Pending JP2000097131A (en) | 1998-09-22 | 1998-09-22 | Setting structure of fuel injection valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2000097131A (en) |
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