JPH09105366A - Fuel filter - Google Patents
Fuel filterInfo
- Publication number
- JPH09105366A JPH09105366A JP7347545A JP34754595A JPH09105366A JP H09105366 A JPH09105366 A JP H09105366A JP 7347545 A JP7347545 A JP 7347545A JP 34754595 A JP34754595 A JP 34754595A JP H09105366 A JPH09105366 A JP H09105366A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- boss
- case body
- fuel
- cover body
- 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
Landscapes
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は燃料フイルタ主と
して燃料噴射式のガソリンエンジンへの使用に適するよ
うにした燃料フイルタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel filter, which is mainly suitable for use in a fuel injection type gasoline engine.
【０００２】[0002]
【従来の技術】燃料噴射式のガソリンエンジンを搭載す
る車両では、一般に図７のように燃料タンクＴ中に配設
した燃料ポンプＰにより燃料を汲み上げ（吐出圧3.5 な
いし5kg ／cm2 程度）、これを燃料フイルタＦを通して
ろ過した上で吸気マニホールドＭ上のインジェクタＩに
送り、かつそこにつながる分岐路を介してプレッシャレ
ギュレ−タＰＲに送り、一方プレッシャレギュレ−タＰ
Ｒには吸気マニホールドＭのスロットルバルブＳＶの下
流側の負圧を導入するようになされていて、燃料供給路
内の圧力と吸気マニホールドＭ内の圧力との差圧に応じ
て余分な燃料をリターン通路Ｒを介してタンクＴに戻
し、燃料の圧力いわゆる燃圧を一定（約2.5kg／cm2 程
度）に保つようにして、インジェクタＩに供給し、電子
制御器介在のもとにエンジンの運転状態に応じた燃料噴
射を行うようにしている。2. Description of the Related Art Generally, in a vehicle equipped with a fuel injection type gasoline engine, fuel is pumped up by a fuel pump P arranged in a fuel tank T as shown in FIG. 7 (a discharge pressure of about 3.5 to 5 kg / cm 2 ). This is filtered through a fuel filter F, sent to an injector I on the intake manifold M, and sent to a pressure regulator PR via a branch passage connected to the intake manifold M, while a pressure regulator P is provided.
A negative pressure on the downstream side of the throttle valve SV of the intake manifold M is introduced into R, and excess fuel is returned according to the pressure difference between the pressure in the fuel supply passage and the pressure in the intake manifold M. The fuel is returned to the tank T via the passage R and supplied to the injector I so that the fuel pressure, that is, the fuel pressure is kept constant (about 2.5 kg / cm 2 ), and the operating condition of the engine is mediated by the intervention of the electronic controller. Fuel injection is performed according to the above.
【０００３】そして、上記燃料供給システムの燃料フイ
ルタには、鉄，アルミニウム等の金属又は合成樹脂製コ
ップ状の容器の内部にろ紙又は不織布を菊花形筒状又は
ロール状に形成したろ材を配設したものが主として用い
られ、又、プレッシャレギュレータＰＲには、燃料の入
口パイプとリターンパイプを有する同じ材質の容器の上
に吸気負圧導入用のパイプを有する帽子状のカバーを取
付け、カバーと容器とをダイヤフラムで仕切り、カバー
中には所定圧（吐出圧より若干低い3 ないし4kg ／cm2
程度）のコイルばねを配設する一方、容器中には弁体を
配設して、ダイヤフラムにかかる容器中の圧力とカバー
内の圧力の差に応じて弁体を開いて余分な燃料をタンク
に戻すようにしたものが用いられている。In the fuel filter of the above fuel supply system, a filter material, which is a cup-shaped container made of metal such as iron or aluminum or a synthetic resin, is formed with filter paper or non-woven fabric in a chrysanthemum cylinder or roll shape. The pressure regulator PR is mainly used, and a cap-shaped cover having a pipe for introducing intake negative pressure is mounted on a container of the same material having a fuel inlet pipe and a return pipe, and the cover and the container are attached. And diaphragm are separated by a diaphragm, and the inside of the cover has a specified pressure (slightly lower than the discharge pressure: 3 to 4 kg / cm 2
While installing a coil spring in the container, a valve is installed in the container, and the valve is opened according to the difference between the pressure in the container and the pressure applied to the diaphragm and the excess fuel is stored in the tank. The one that was made to return to is used.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記従来の
燃料フイルタやプレッシャレギュレータは個々別々のも
ので、単一の機能しか備えておらず、しかも、燃料タン
クから離れた所に配置されていて、それぞれのセットス
ペースを必要とし、部品点数や接続部が多く、配管が複
雑になり、シール不良等の不具合を生じ易く、組立にも
手間がかかりコスト高を招いてしまう。By the way, the above-mentioned conventional fuel filters and pressure regulators are separate, have only a single function, and are arranged at a distance from the fuel tank. Each set space is required, the number of parts and the number of connection parts are large, piping is complicated, defects such as defective seals are likely to occur, and assembly is time-consuming and costly.
【０００５】そこで、この発明は燃料フイルタにプレッ
シャレギュレータの機能を持たせ、部品点数や接続部及
びセットスペースの減少を図り、組立易くしてコスト高
にならないようにすることを課題とする。Therefore, it is an object of the present invention to provide a fuel filter with a function of a pressure regulator so as to reduce the number of parts, the connecting portion and the set space, and to facilitate the assembly without increasing the cost.
【０００６】[0006]
【課題を解決するための手段】上記課題のもとにこの発
明は、燃料噴射式のガソリンエンジンに用いられる燃料
フイルタとして、第１に下側が開放され側部に入口パイ
プを有する円筒状のケース本体と、その開放端を閉じる
カバー体及び両者の間に配設される円筒状のろ過エレメ
ントとからなり、ろ過エレメントの内側に当たるケース
本体の中央部には内部に中空室を形成したボス部を設
け、ボス部上には吸気マニホールドの負圧導入用の負パ
イプとインジェクタにつながる出口パイプを取付け、負
パイプは中空室に連通させると共に出口パイプはろ過エ
レメントの内側に連通させ、カバー体の中央部にはケー
ス本体のボス部に対向しろ過エレメントの内側に連通す
るボス筒を設け、ボス筒内には弁体とリターン用の通孔
を有する弁軸筒を配設し、かつケース本体のボス部とカ
バー体のボス筒との対向面間には所定圧に下向きにばね
付勢したダイヤフラムを張設し、該ダイヤフラムを上記
弁体に圧接させてリターン用通孔を開閉するようにな
し、ケース本体を燃料タンク内に吊持するようにしたこ
とを特徴とし、第２には下側が開放され側部に入口パイ
プを有する円筒部とその上の首筒部とこの首筒部から四
方に広がるフランジ部からなるケース本体と、その開放
端を閉じ中央にボス筒を有するカバー体とからなり、ケ
ース本体のろ過エレメント内に当たる中央部には、下端
部がカバー体のボス筒に嵌合し上端部は首筒部内に伸び
る内側にリターン用の通孔を有しかつ通孔上端部に弁体
を備える弁軸筒を設け、上記円筒部と首筒部は弁軸筒の
周りにおいて連通させ、首筒部の一側にはインジェクタ
につながる出口パイプを有する横通路を連設し、首筒部
上には吸気マニホールドの負圧導入用の負パイプを有す
る帽子状体を取付け、首筒部と帽子状体との間には所定
圧に下向きにばね付勢したダイヤフラムを張設し、該ダ
イヤフラムを弁体に圧接させてリターン用の通孔を開閉
するようになし、上記ケース本体を燃料タンク内に吊持
するようにしたことを特徴とし、第３には上記第２の燃
料フイルタにおいて、ケース本体とカバー体とを分離可
能に結合すると共にろ過エレメントをケース本体に対し
又はケース本体とカバー体に対し分離可能に配設し、か
つケース本体を燃料タンクに対し着脱可能に取付けるよ
うにしたことを特徴としている。SUMMARY OF THE INVENTION Based on the above-mentioned problems, the present invention provides a fuel filter used for a fuel injection type gasoline engine, which is a cylindrical case having an opening on the lower side and an inlet pipe on the side. It consists of a main body, a cover body that closes its open end, and a cylindrical filtration element that is placed between the two.A boss with a hollow chamber inside is formed in the center of the case body that is inside the filtration element. Provided on the boss, a negative pipe for introducing negative pressure of the intake manifold and an outlet pipe connected to the injector are installed.The negative pipe is connected to the hollow chamber and the outlet pipe is connected to the inside of the filtration element. A boss cylinder that faces the boss of the case body and communicates with the inside of the filtration element is provided in the portion, and a valve body and a valve shaft cylinder having a return hole are arranged in the boss cylinder. In addition, a diaphragm, which is biased downward by a predetermined pressure, is stretched between the opposing surfaces of the boss portion of the case body and the boss cylinder of the cover body, and the diaphragm is brought into pressure contact with the valve body to form a return hole. It is characterized in that the case main body is suspended in the fuel tank, and secondly, there is provided a cylindrical portion having an inlet pipe on the lower side and a neck portion above the cylindrical portion. It consists of a case body consisting of a flange part that spreads from the neck cylinder part in all directions, and a cover body that closes the open end and has a boss cylinder in the center, and the lower end part of the cover body is in the center part that is inside the filtration element of the case body. Of the valve shaft cylinder having a valve body at the upper end of the through hole, which is fitted to the boss cylinder of the valve and has a return through hole extending inside the neck cylinder. Connect around the shaft cylinder and attach it to one side of the neck cylinder. A horizontal passage having an outlet pipe connected to the injector is continuously provided, and a hat-shaped body having a negative pipe for introducing a negative pressure of the intake manifold is attached on the neck cylinder portion, and between the neck cylinder portion and the hat-shaped body. A diaphragm that is spring-biased downward at a predetermined pressure is stretched, the diaphragm is pressed against the valve body to open and close the return hole, and the case body is suspended in the fuel tank. Thirdly, in the second fuel filter described above, thirdly, the case body and the cover body are separably coupled to each other, and the filtering element is arranged to be separable from the case body or the case body and the cover body. In addition, the case body is detachably attached to the fuel tank.
【０００７】[0007]
【発明の実施の形態】図１及び図２はこの発明に係る燃
料フイルタＦの一例を示すものであり、下側が開放され
た円筒状のケース本体１とその開放端を閉じる板状のカ
バー体２と両者の間に配設される円筒状のろ過エレメン
ト３からなるが、ケース本体１とカバー体２はナイロ
ン，ポリアセタール等の合成樹脂又はアルミニウム等の
軽金属製のもので、ケース本体１はろ過エレメント３の
内側に当たる中央部に下半部が中空室１ｂをなしほぼ本
体の半分高さのボス部１ａが下向きに設けられると共に
上壁の周辺は外方に張出す円形のフランジ部１ｃをなし
ており、ケース本体１の一側部には燃料ポンプにつなが
る入口パイプ４ａが設けられ、ボス部１ａ上には、中央
部に負圧導入用の負パイプ４ｃが、片寄った位置にイン
ジェクタにつながる出口パイプ４ｂがそれぞれ抜け止め
部材を介して取付けられていて、負パイプ４ｃは通孔１
ｄを介して中空室１ｂに連通し、出口パイプ４ｂはろ過
エレメント３の内側即ちクリーンサイドに連通してい
る。1 and 2 show an example of a fuel filter F according to the present invention, which is a cylindrical case body 1 whose lower side is open and a plate-like cover body which closes its open end. 2 and a cylindrical filtration element 3 arranged between the two. The case body 1 and the cover body 2 are made of a synthetic resin such as nylon or polyacetal or a light metal such as aluminum, and the case body 1 is filtered. The lower half of the center of the element 3 is a hollow chamber 1b, and a boss 1a having a height half that of the main body is provided downward, and the upper wall has a circular flange 1c extending outward. An inlet pipe 4a connected to the fuel pump is provided on one side of the case body 1, and a negative pipe 4c for introducing negative pressure is centrally provided on the boss 1a and is connected to the injector at an offset position. Mouth pipe 4b is attached via the retaining member respectively, negative pipe 4c is hole 1
It communicates with the hollow chamber 1b via d, and the outlet pipe 4b communicates with the inside of the filter element 3, that is, the clean side.
【０００８】一方、カバー体２の中央部にはケース本体
１のボス部１ａに対向し本体のほぼ半分高さのボス筒２
ａとその内側にあって高さの低い支え筒２ｂが同心状に
上向きに設けられ、ボス筒２ａは複数の横通孔２ｃを備
えており、支え筒２ｂにはボス筒２ａより若干低い弁軸
筒５が装着され、弁軸筒５は内側に弁座５ａとリターン
用の段付通孔５ｂを有し、内側上部には金属製の弁体６
（図では球体のものを示したが円錐体等他の形態でもよ
い）と弁座５ａに対するステックを防ぐ力の弱いばね６
ａが配設され、カバー体２には弁軸筒５の段付通孔５ｂ
に続く通孔２ｄが設けられている。On the other hand, in the central portion of the cover body 2, a boss cylinder 2 facing the boss portion 1a of the case main body 1 and having a height approximately half the main body
a and a supporting cylinder 2b having a low height inside thereof are concentrically provided upward, the boss cylinder 2a is provided with a plurality of lateral through holes 2c, and the supporting cylinder 2b has a valve slightly lower than the boss cylinder 2a. A shaft cylinder 5 is mounted, the valve shaft cylinder 5 has a valve seat 5a and a stepped through hole 5b for return inside, and a metal valve body 6 on the inside upper part.
(A spherical body is shown in the figure, but other forms such as a cone may be used) and a spring 6 having a weak force to prevent sticking to the valve seat 5a.
a is provided, and the cover body 2 has a stepped through hole 5b of the valve shaft cylinder 5.
The through hole 2d is provided.
【０００９】そして、ケース本体１のボス部１ａとカバ
ー体２のボス筒２ａとの間にアクリロニトリルブタジェ
ンゴムのような柔軟なゴム材からなるダイヤフラム７が
配設され、その周縁部が両ボス部の対向フランジ部間に
挟持されており、ダイヤフラム７の中央部には鉄製のリ
テーナ７ａがリベット７ｂで止着され、このリテーナ７
ａと中空室１ｂの天井との間には燃料ポンプの吐出圧よ
り若干低い３ないし４kg／cm2 程度のばね圧のコイルば
ね８が配設され、エンジンの非作動時にはそのばね力に
よりダイヤフラム７及びリベット７ｂを介し弁体６が下
方に押され、弁座５ｂに圧接してリターン用の通孔５ｂ
を閉じており、このようにして、ケース本体１のボス部
１ａとカバー体２のボス筒２ａの内側に一種のプレッシ
ャレギュレータＰＲが形成されている。A diaphragm 7 made of a soft rubber material such as acrylonitrile butadiene rubber is disposed between the boss portion 1a of the case body 1 and the boss cylinder 2a of the cover body 2, and the peripheral portion of the diaphragm 7 is formed by both bosses. It is sandwiched between opposed flange portions of the section, and an iron retainer 7a is fixed to the center of the diaphragm 7 with a rivet 7b.
A coil spring 8 having a spring pressure of about 3 to 4 kg / cm 2 which is slightly lower than the discharge pressure of the fuel pump is disposed between a and the ceiling of the hollow chamber 1b, and when the engine is not operating, the diaphragm 7 is driven by the spring force. Also, the valve body 6 is pushed downward via the rivet 7b and pressed against the valve seat 5b, and the return through hole 5b is formed.
Is closed, and in this way, a kind of pressure regulator PR is formed inside the boss portion 1a of the case body 1 and the boss cylinder 2a of the cover body 2.
【００１０】ろ過エレメント３はろ紙，不織布を菊花形
筒状又はロール状に形成したろ材又は多孔質の焼結金属
からなる筒状のろ材３ａの上下端に端板３ｂを被着した
もので、カバー体２の周縁部及びボス筒２ａのフランジ
部をケース本体１の下端周縁部及びボス部１ａのフラン
ジ部に接着又は溶着（金属の場合は溶接）するに先立っ
て、ろ過エレメント３の下端をエポキシ系，塩化ビニル
系の接着剤でカバー体２に液密に取付けておき、カバー
体２の結合時に上端をケース本体１の上壁の下面に接着
剤により同様に固着する。又、ダイヤフラム７の周縁部
はケース本体１のボス部１ａに対するカバー体２のボス
筒２ａの固着時に両者のフランジ部の間に挟着される。The filter element 3 is a filter medium formed by filtering paper or non-woven fabric into a chrysanthemum cylinder or a roll, or a cylindrical filter medium 3a made of porous sintered metal, and end plates 3b attached to the upper and lower ends thereof. Prior to adhering or welding (in the case of metal, welding) the lower end of the filtration element 3 to the peripheral edge of the cover body 2 and the flange of the boss cylinder 2a to the lower peripheral edge of the case body 1 and the flange of the boss 1a. It is liquid-tightly attached to the cover body 2 with an epoxy or vinyl chloride adhesive, and the upper end of the cover body 2 is similarly fixed to the lower surface of the upper wall of the case body 1 when the cover body 2 is joined. The peripheral edge of the diaphragm 7 is sandwiched between the flange portions of the case body 1 and the boss cylinder 2a of the cover body 2 when the boss cylinder 2a of the cover body 2 is fixed.
【００１１】上記燃料フイルタＦは燃料タンクＴ内に上
方から挿入され、その上壁周辺のフランジ部１ｃがタン
クＴの天井壁Ｔａに接着，溶接等により液密に取付けら
れ、図３のように入口パイプ４ａは燃料タンクＴ内に配
設された燃料ポンプＰに連結され、出口パイプ４ｂはホ
ース部材を介し吸気マニホールドＭ上のインジェクタＩ
に接続されると共に負パイプ４ｃはスロットルバルブＳ
Ｖの下流側の位置において吸気マニホールドＭに接続さ
れる。図３においてＡはエアクリーナ、Ｅはエンジンで
ある。The fuel filter F is inserted into the fuel tank T from above, and the flange portion 1c around the upper wall thereof is liquid-tightly attached to the ceiling wall Ta of the tank T by adhesion, welding or the like, as shown in FIG. The inlet pipe 4a is connected to the fuel pump P arranged in the fuel tank T, and the outlet pipe 4b is connected to the injector I on the intake manifold M via a hose member.
And the negative pipe 4c is connected to the throttle valve S
It is connected to the intake manifold M at a position downstream of V. In FIG. 3, A is an air cleaner and E is an engine.
【００１２】そこで、エンジンＥを始動させれば、その
始動信号により燃料ポンプＰが作動し、タンクＴ内の燃
料が汲み上げられて入口パイプ４ａからケース本体１中
に入り、ろ過エレメント３を横切ることにより浄化され
て出口パイプ４ｂからホース部材を介しインジェクタＩ
に送られるが、その際、ろ過エレメント３を横切った燃
料の一部は複数の横通孔２ｃを通ってボス筒２ａ中に入
る一方、ケース本体１のボス部１ａの中空室１ｂ中には
吸気マニホールドＭ内の負圧が導入される。Therefore, when the engine E is started, the fuel pump P is activated by the start signal, the fuel in the tank T is pumped up, enters the case body 1 through the inlet pipe 4a, and crosses the filter element 3. After being purified by the injector I via the hose member from the outlet pipe 4b.
At that time, a part of the fuel that has passed through the filtration element 3 enters the boss cylinder 2a through the plurality of horizontal through holes 2c, while it enters the hollow chamber 1b of the boss portion 1a of the case body 1. Negative pressure in the intake manifold M is introduced.
【００１３】そのため、ケース本体側ボス部１ａとカバ
ー体側ボス筒２ａとの間を仕切るダイヤフラム７には、
上側にコイルばね８のばね力と吸気マニホールドのスロ
ットルバルブＳＶ下流側の負圧が作用し、下側には燃料
の圧力（吐出圧より損失分だけ小さい）が作用すること
になり、負圧が全く存在しなければダイヤフラム７の上
下の力がバランスして弁体６は動かず、エレメント３を
横切った殆どの燃料がインジェクタＩに送られることに
なるが、実際にはそういうことはなく、吸気マニホール
ドＭ内には、アイドリング時には大きく、高速運転時に
は小さくというように変化しつつ常に負圧が存在し、そ
の負圧に応じてダイヤフラム７及び弁体６が上下動し
て、弁軸筒５のリターン用通孔５ｂを大きく、又は小さ
く開いて、運転状態に対応した余分な燃料を通孔５ｂ，
２ｄを通じてタンクＴに戻し、燃圧を所定（約2.5kg ／
cm2 程度）に調整しながらインジェクタＩに供給する。
この過程でリターン用の通孔５ｂが開かれても、ケース
本体１内の燃圧が高いので、タンクＴ内の燃料がケース
本体側に逆流することはない。Therefore, the diaphragm 7 partitioning the case body side boss portion 1a and the cover body side boss cylinder 2a is
The spring force of the coil spring 8 and the negative pressure on the downstream side of the throttle valve SV of the intake manifold act on the upper side, and the fuel pressure (smaller than the discharge pressure by a loss) acts on the lower side. If it does not exist at all, the upper and lower forces of the diaphragm 7 are balanced, the valve body 6 does not move, and most of the fuel that has crossed the element 3 is sent to the injector I. However, in reality, this does not occur, and the intake air In the manifold M, there is always a negative pressure while changing such that it is large at idling and small at high speed operation, and the diaphragm 7 and the valve body 6 move up and down according to the negative pressure to move the valve shaft cylinder 5 The return through hole 5b is opened large or small, and the extra fuel through hole 5b corresponding to the operating state,
Return to the tank T through 2d and set the fuel pressure to the specified value (about 2.5 kg /
Supply it to the injector I while adjusting it to about cm 2 .
Even if the return through hole 5b is opened in this process, the fuel pressure in the case body 1 is high, so that the fuel in the tank T does not flow back to the case body side.
【００１４】上述の例はプレッシャレギュレータＰＲを
ケース本体中に内蔵する状態に設けたのに対し、図４，
図５はケース本体上に露出する状態に設けてフイルタ装
置に組付け易くした例を示すものであり、この例では下
側の開放されたケース本体１１は、円筒部１１ａと首筒
部１１ｂ及びその首筒部１１ｂの途中から四方に広がる
角形，円形，だ円形等適宜形状のフランジ部１１ｃと
で、ほぼ逆さ脚付のコップ状をなす一方、その開放端を
閉じるカバー体１２は上側が開放されたコップ状をなし
ている。In the above-mentioned example, the pressure regulator PR is installed in the case body, whereas in FIG.
FIG. 5 shows an example in which the case body 11 is provided so as to be exposed on the case body so as to be easily assembled to the filter device. In this example, the lower opened case body 11 includes a cylindrical portion 11a, a neck cylinder portion 11b, and The neck portion 11b is formed into a cup shape with a substantially upside-down leg by a flange portion 11c having a square shape, a circular shape, an oval shape or the like that spreads in all directions from the middle of the neck cylinder portion 11b, while the cover body 12 that closes its open end has an open upper side. It has a cup shape.
【００１５】ケース本体１１とカバー体１２は上述の例
と同じ材質のもので、ケース本体１１の円筒部１１ａの
一側部には入口パイプ１１ｅが設けられ、中央部には円
筒部１１ａの下端部からその上壁１１ｄを貫いて首筒部
１１ｂの上端部近くに至る細長な弁軸筒１５が立設さ
れ、その弁軸筒１５の内側には上端部に弁座１５ａが設
けられると共にこれに続いて段付けられたリターン用の
中心通孔１５ｂが設けられ、上端部内には金属製の弁体
１６（これは図示のように球体でなくてもよい）と弁座
１５ａに対するステックを防ぐ力の弱いばね１６ａが配
設されている。The case body 11 and the cover body 12 are made of the same material as the above-mentioned example. An inlet pipe 11e is provided at one side of the cylindrical portion 11a of the case body 11, and a lower end of the cylindrical portion 11a is provided at the center. A slender valve shaft cylinder 15 extending from the portion through the upper wall 11d to the vicinity of the upper end of the neck cylinder 11b is provided upright. Inside the valve shaft cylinder 15, a valve seat 15a is provided at the upper end and A stepped center through hole 15b for return is provided following the step, and a stick on the valve body 16 (which may not be a sphere as shown) and the valve seat 15a is prevented in the upper end portion. A weak spring 16a is provided.
【００１６】首筒部１１ｂの上端は柔軟なゴム材からな
るダイヤフラム１７でおおわれると共にその上には鉄，
アルミニウム等の金属板からなり中央部に負圧導入用の
負パイプ１４ａを有する帽子状体１４が配設され、ダイ
ヤフラム１７の周縁部は帽子状体１４の下側周辺部によ
り首筒部１１ｂの上端フランジ部に対し挟み付けられて
おり、また、ダイヤフラム１７の中央部には鉄製のリテ
ーナ１７ａがリベット１７ｂで止着され、このリテーナ
１７ａと帽子状体１４の天井との間には燃料ポンプの吐
出圧より若干低い３ないし４kg／cm2 程度のばね圧のコ
イルばね１８が配設され、エンジンの非作動時にはその
ばね力によりダイヤフラム１７及びリベット１７ｂを介
し弁体１６が下方に押され、弁座１５ａに圧接してリタ
ーン用の通孔１５ｂを閉じており、このようにして一種
のプレッシャレギュレータＰＲがケース本体１１の上に
露出する状態に形成されている。The upper end of the neck portion 11b is covered with a diaphragm 17 made of a flexible rubber material, and iron,
A cap-like body 14 made of a metal plate such as aluminum having a negative pipe 14a for introducing a negative pressure is disposed in the central portion, and the peripheral edge of the diaphragm 17 is defined by the lower peripheral portion of the cap-like body 14 and the neck cylinder portion 11b. It is sandwiched by the upper end flange portion, and an iron retainer 17a is fixed to the center of the diaphragm 17 by a rivet 17b, and between the retainer 17a and the ceiling of the cap-shaped body 14, a fuel pump is installed. A coil spring 18 having a spring pressure of about 3 to 4 kg / cm 2 which is slightly lower than the discharge pressure is provided, and when the engine is not operating, the spring force pushes the valve body 16 downward through the diaphragm 17 and the rivet 17b. The through hole 15b for return is closed by being pressed against the seat 15a, thus forming a kind of pressure regulator PR exposed on the case main body 11. It has been.
【００１７】また、首筒部１１ｂの一側でフランジ部１
１ｃと円筒部１１ａの上壁１１ｄとの間には首筒部１１
ｂ内に通じる横通路１９が形成され、この横通路１９の
途中にはフランジ部１１ｃを貫いて出口パイプ１９ａが
立設され、その外端には盲栓１９ｂが施され、かつ円筒
部１１ａの上壁１１ｄの弁軸筒１５を囲む部分には図２
のように弧状の通孔１５ｃが複数設けられている。The flange portion 1 is provided on one side of the neck tube portion 11b.
1c and the upper wall 11d of the cylindrical portion 11a between the neck portion 11
A lateral passage 19 communicating with the inside of b is formed, an outlet pipe 19a is erected upright in the middle of this lateral passage 19 through the flange portion 11c, and a blind plug 19b is provided on the outer end of the outlet pipe 19a. The portion of the upper wall 11d that surrounds the valve stem 15 is shown in FIG.
As described above, a plurality of arc-shaped through holes 15c are provided.
【００１８】カバー体１２は周壁の上端に外方に張出す
フランジを備えていて、ケース本体１１の円筒部１１ａ
下端のフランジに突き合せられ、相互に溶着されるか又
は帯金２０によってかしめ付けられるが、底壁の中央部
には周壁より高く内部通孔１２ｂを持つボス筒１２ａが
立設されていて、ケース本体１１との結合に際し、ケー
ス本体１１中の弁軸筒１５の下端部がパッキングを介し
液密に嵌め込まれる。The cover body 12 is provided with a flange projecting outward at the upper end of the peripheral wall, and the cylindrical portion 11a of the case body 11 is provided.
The boss cylinders 12a, which are abutted against the flange at the lower end and welded to each other or caulked by the band 20, have a boss cylinder 12a having an internal through hole 12b higher than the peripheral wall in the central portion of the bottom wall. At the time of coupling with the case body 11, the lower end portion of the valve shaft cylinder 15 in the case body 11 is liquid-tightly fitted through the packing.
【００１９】ろ過エレメント１３は上述の例と同じくろ
紙，不織布を菊花形筒状又はロール状に形成したろ材又
は多孔質の焼結金属からなる筒状のろ材１３ａの上下端
に環状の端板１３ｂを被着したもので、カバー体１２を
ケース本体１１に結合するに先立って、ろ過エレメント
１３の下端部を接着剤によりカバー体１２に液密に取付
けておき、カバー体１２の結合時に上端をケース本体１
１の上壁下面のみぞ部に嵌め込んで接着剤により液密に
固定する。The filtering element 13 is the same as the above-mentioned example, and is a filter medium formed by filtering paper or non-woven fabric into a chrysanthemum cylinder or roll, or a cylindrical filter medium 13a made of porous sintered metal. Before the cover body 12 is joined to the case body 11, the lower end portion of the filtration element 13 is liquid-tightly attached to the cover body 12 with an adhesive, and the upper end when the cover body 12 is joined. Case body 1
1 is fitted into the groove portion of the lower surface of the upper wall and fixed in a liquid-tight manner with an adhesive.
【００２０】この燃料フイルタＦは上述のように燃料タ
ンクＴ内に上方から挿入され、そのフランジ部１１ｃが
タンクＴの天井壁Ｔａに接着，溶接等により液密に取付
けられ、入口パイプ１１ｅは燃料タンクＴ内に配設され
た燃料ポンプに連結され、負パイプ１４ａはホース部材
を介しスロットルバルブの下流側の位置において吸気マ
ニホールドに接続され、出口パイプ１９ａはホース部材
を介しマニホールド上のインジェクタに接続される。As described above, the fuel filter F is inserted into the fuel tank T from above, and the flange portion 11c thereof is liquid-tightly attached to the ceiling wall Ta of the tank T by adhesion, welding or the like, and the inlet pipe 11e is made of fuel. The negative pipe 14a is connected to a fuel pump arranged in the tank T, is connected to an intake manifold at a position downstream of the throttle valve via a hose member, and the outlet pipe 19a is connected to an injector on the manifold via a hose member. To be done.
【００２１】エンジンの始動により、タンクＴ内の燃料
がポンプで汲み上げられて入口パイプ１１ｅからケース
本体１１及びカバー体１２中に入り、ろ過エレメント１
３を横切り浄化されつつ中央部に出て、ケース本体の上
壁１１ｄに設けられた通孔１５ｃを通って首筒部１１ｂ
内に入り、横通路１９を経て出口パイプ１９ａからイン
ジェクタ側に送られるが、その際、首筒部１１ｂ上に取
付けられた帽子状体１４内には負パイプ１４ａを通じマ
ニホールド内に生じる負圧が導入されていて、ダイヤフ
ラム１７を押下げているコイルばね１８のばね力が、負
圧の大きさに応じてみかけ上変化しダイヤフラム１７及
び弁体１６が上下動して弁軸筒１５のリターン用の通孔
１５ｂを大きく又は小さく開いて、エンジンの運転状態
に応じて余分な燃料を通孔１５ｂ，１２ｂをタンクＴに
戻す機能は上述の例と変りない。When the engine is started, the fuel in the tank T is pumped up by the pump and enters the case body 11 and the cover body 12 from the inlet pipe 11e, and the filtration element 1
Crossing 3 and exiting to the center while being purified, and passing through a through hole 15c provided in the upper wall 11d of the case body, the neck cylinder 11b.
Inside, it is sent to the injector side from the outlet pipe 19a through the lateral passageway 19. At this time, the negative pressure generated in the manifold through the negative pipe 14a is generated in the hat-shaped body 14 mounted on the neck cylinder portion 11b. The spring force of the coil spring 18 that has been introduced and is pushing down the diaphragm 17 apparently changes according to the magnitude of the negative pressure, and the diaphragm 17 and the valve body 16 move up and down to return the valve shaft cylinder 15. The function of returning the extra fuel passage holes 15b and 12b to the tank T according to the operating state of the engine is the same as the above example.
【００２２】図６は上記図４，図５に示す例において、
ケース本体１１とカバー体１２をねじｎ又はクランプ部
材により分離可能に結合すると共にケース本体１１のフ
ランジ部１１ｃを燃料タンクＴにねじｎにより着脱可能
に取付けて、ろ過エレメント１３を交換可能としたタイ
プのもので、この場合にはろ過エレメント１３の下端は
カバー体１２に接着剤により固定するが、上端は端板１
５ｂの上にシール材Ｓを施して、ケース本体の上壁１１
ｃ下面のみぞ部に着脱可能に嵌合させておき、ろ材１３
ａが所定の時間経過により目詰まりした際にはカバー体
１２と共に新しいものと交換する。しかし、ろ過エレメ
ント１３の下端においても上端と同様に端板の下面にシ
ール材Ｓを施して配設するようになし、ろ過エレメント
１３だけを交換するようにしてもよい。FIG. 6 shows an example of the example shown in FIGS.
A type in which the case body 11 and the cover body 12 are separably connected by a screw n or a clamp member, and the flange portion 11c of the case body 11 is detachably attached to the fuel tank T by a screw n so that the filtration element 13 can be replaced. In this case, the lower end of the filter element 13 is fixed to the cover body 12 with an adhesive, while the upper end is the end plate 1.
The sealing material S is applied on the upper surface 5b of the case main body 11
c The filter member 13 is detachably fitted to the groove on the lower surface.
When a is clogged due to the passage of a predetermined time, the cover body 12 is replaced with a new one. However, also at the lower end of the filter element 13, the lower surface of the end plate may be provided with the sealing material S similarly to the upper end, and only the filter element 13 may be replaced.
【００２３】[0023]
【発明の効果】この発明は燃料噴射式のガソリンエンジ
ンに用いられる燃料フイルタとして、上述のように構成
されているので、これまで別々であった燃料フイルタと
プレッシャレギュレータの機能を兼ね備えることがで
き、それだけ部品点数や接続部が少なくなって、部品の
管理と組立がやり易くなり、そして、燃料タンク内に装
備するようにしたためセットスペースを節約することが
でき、シール不良等の不具合を生じることなく配管状態
を簡素化でき、狭隘な場所での使用に適している。そし
て、請求項２のようにプレッシャレギュレータ部分をケ
ース本体上に露出する状態に設けるようにすれば、ろ過
エレメントをケース本体とカバー体の間に組付けてフイ
ルタ部分を構成した後において、弁体やダイヤフラム及
びコイばねをケース本体に組付けることができ、作業が
やり易く、点検もやり易い。又、請求項２に記載の燃料
フイルタでは、請求項３のようにケース本体やカバー体
及びろ過エレメントを分離可能に取付けておけば、ろ過
エレメントを随時交換することができる。Since the present invention is constructed as described above as a fuel filter used in a fuel injection type gasoline engine, it is possible to combine the functions of the fuel filter and the pressure regulator which have been separated so far, As a result, the number of parts and the number of connections are reduced, which makes it easier to manage and assemble parts, and because it is equipped in the fuel tank, set space can be saved and problems such as defective seals do not occur. The piping condition can be simplified, making it suitable for use in tight spaces. When the pressure regulator portion is provided so as to be exposed on the case body as in claim 2, the valve element is formed after the filter element is assembled between the case body and the cover body to form the filter portion. A diaphragm and a coil spring can be attached to the case body, making it easy to work and inspect. In the fuel filter according to the second aspect, if the case body, the cover body and the filter element are detachably attached as in the third aspect, the filter element can be replaced at any time.
【図１】この発明に係る燃料フイルタの一例の断面図。FIG. 1 is a sectional view of an example of a fuel filter according to the present invention.
【図２】その平面図。FIG. 2 is a plan view thereof.
【図３】図１の燃料フイルタを用いた燃料供給システム
の系統図。FIG. 3 is a system diagram of a fuel supply system using the fuel filter of FIG.
【図４】他の例の断面図。FIG. 4 is a cross-sectional view of another example.
【図５】その平面図。FIG. 5 is a plan view thereof.
【図６】図４のタイプのものの変更例の一部の断面図。6 is a partial cross-sectional view of a modification of the type of FIG.
【図７】従来の燃料フイルタを用いた燃料供給システム
の系統図。FIG. 7 is a system diagram of a fuel supply system using a conventional fuel filter.
１ ケース本体 １ａ ボス部 １ｂ 中空室 ２ カバー体 ２ａ ボス筒 ２ｃ 横通孔 ３ ろ過エレメント ４ａ 入口パ
イプ ４ｂ 出口パイプ ４ｃ 負パイ
プ ５ 弁軸筒 ５ａ 弁座 ６ 弁体 ７ ダイヤフ
ラム １１ ケース本体 １１ａ 円筒
部 １１ｂ 首筒部 １１ｅ 入口
パイプ １２ カバー体 １２ａ ボス
筒 １３ ろ過エレメント １４ 帽子状
体 １４ａ 負パイプ １５ 弁軸筒 １６ 弁体 １７ ダイヤ
フラム １９ 横通路 １９ａ 出口
パイプ Ｆ 燃料フイルタ ＰＲ プレッ
シャレギュレータ1 Case body 1a Boss part 1b Hollow chamber 2 Cover body 2a Boss cylinder 2c Horizontal through hole 3 Filtration element 4a Inlet pipe 4b Outlet pipe 4c Negative pipe 5 Valve shaft cylinder 5a Valve seat 6 Valve body 7 Diaphragm 11 Case body 11a Cylindrical part 11b Neck cylinder part 11e Inlet pipe 12 Cover body 12a Boss cylinder 13 Filtration element 14 Hat-shaped body 14a Negative pipe 15 Valve shaft cylinder 16 Valve body 17 Diaphragm 19 Side passage 19a Outlet pipe F Fuel filter PR Pressure regulator
Claims (3)
る円筒状のケース本体と、その開放端を閉じるカバー体
及び両者の間に配設される円筒状のろ過エレメントとか
らなり、ろ過エレメントの内側に当たるケース本体の中
央部には内部に中空室を形成したボス部を設け、ボス部
上には吸気マニホールドの負圧導入用の負パイプとイン
ジェクタにつながる出口パイプを取付け、負パイプは中
空室に連通させると共に出口パイプはろ過エレメントの
内側に連通させ、カバー体の中央部にはケース本体のボ
ス部に対向しろ過エレメントの内側に連通するボス筒を
設け、ボス筒内には弁体とリターン用の通孔を有する弁
軸筒を配設し、かつケース本体のボス部とカバー体のボ
ス筒との対向面間には所定圧に下向きにばね付勢したダ
イヤフラムを張設し、該ダイヤフラムを上記弁体に圧接
させてリターン用通孔を開閉するようになし、ケース本
体を燃料タンク内に吊持するようにしたことを特徴とす
る燃料フイルタ。1. A filter element comprising a cylindrical case body having an open lower side and an inlet pipe on the side, a cover body closing the open end, and a cylindrical filter element arranged between the two. A boss with a hollow chamber inside is provided in the center of the case body that contacts the inside of the case, and a negative pipe for introducing negative pressure of the intake manifold and an outlet pipe connected to the injector are installed on the boss. The outlet pipe communicates with the inside of the filtration element, and the outlet pipe communicates with the inside of the filtration element.A boss cylinder that faces the boss of the case body and communicates with the inside of the filtration element is provided in the center of the cover body. And a valve shaft cylinder having a return hole, and a diaphragm, which is downwardly biased by a predetermined pressure, is stretched between the opposing surfaces of the boss portion of the case body and the boss cylinder of the cover body. A fuel filter, wherein the diaphragm is brought into pressure contact with the valve body to open and close the return through hole, and the case main body is suspended in the fuel tank.
る円筒部とその上の首筒部とこの首筒部から四方に広が
るフランジ部からなるケース本体と、その開放端を閉じ
中央にボス筒を有するカバー体とからなり、ケース本体
のろ過エレメント内に当たる中央部には、下端部がカバ
ー体のボス筒に嵌合し上端部は首筒部内に伸び内側にリ
ターン用の通孔を有しかつ通孔上端部に弁体を備える弁
軸筒を設け、上記円筒部と首筒部は弁軸筒の周りにおい
て連通させ、首筒部の一側にはインジェクタにつながる
出口パイプを有する横通路を連設し、首筒部上には吸気
マニホールドの負圧導入用の負パイプを有する帽子状体
を取付け、首筒部と帽子状体との間には所定圧に下向き
にばね付勢したダイヤフラムを張設し、該ダイヤフラム
を弁体に圧接させてリターン用の通孔を開閉するように
なし、上記ケース本体を燃料タンク内に吊持するように
したことを特徴とする燃料フイルタ。2. A case main body comprising a cylindrical portion having an opening on the lower side and having an inlet pipe on the side, a neck cylinder portion above the neck cylinder portion, and a flange portion extending in four directions from the neck cylinder portion; It consists of a cover body with a cylinder, and the lower end fits into the boss cylinder of the cover body and the upper end extends into the neck cylinder part and has a return through hole inside, at the center part that hits the inside of the filtration element of the case body. And a valve shaft cylinder provided with a valve body is provided at the upper end of the through hole, the cylinder part and the neck cylinder part are communicated with each other around the valve shaft cylinder, and a lateral side having an outlet pipe connected to the injector is provided on one side of the neck cylinder part. A passage is provided continuously, and a cap-shaped body having a negative pipe for introducing a negative pressure of the intake manifold is attached on the neck cylinder part, and a downward bias of a predetermined pressure is applied between the neck cylinder part and the cap-shaped body. The diaphragm is stretched, and the diaphragm is pressed against the valve body. A fuel filter, wherein a return through hole is opened and closed, and the case body is suspended in a fuel tank.
合すると共にろ過エレメントをケース本体に対し又はケ
ース本体とカバー体に対し分離可能に配設し、かつケー
ス本体を燃料タンクに対し着脱可能に取付けるようにし
たことを特徴とする請求項２記載の燃料フイルタ。3. The case body and the cover body are separably coupled to each other, and the filtering element is arranged to be separable from the case body or the case body and the cover body, and the case body is detachable from the fuel tank. The fuel filter according to claim 2, wherein the fuel filter is mounted on the fuel filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7347545A JPH09105366A (en) | 1995-08-08 | 1995-12-18 | Fuel filter |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-221213 | 1995-08-08 | ||
| JP22121395 | 1995-08-08 | ||
| JP7347545A JPH09105366A (en) | 1995-08-08 | 1995-12-18 | Fuel filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09105366A true JPH09105366A (en) | 1997-04-22 |
Family
ID=26524160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7347545A Pending JPH09105366A (en) | 1995-08-08 | 1995-12-18 | Fuel filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09105366A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003012281A1 (en) * | 2001-07-30 | 2003-02-13 | Mikuni Corporation | Vapor removing device for fuel feed system of internal combustion engine |
| US7901572B2 (en) * | 2007-04-26 | 2011-03-08 | Nifco Inc. | Fuel filter apparatus |
| CN102374083A (en) * | 2011-11-26 | 2012-03-14 | 蚌埠金威滤清器有限公司 | Modularized fuel oil alarm coarse filter |
-
1995
- 1995-12-18 JP JP7347545A patent/JPH09105366A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003012281A1 (en) * | 2001-07-30 | 2003-02-13 | Mikuni Corporation | Vapor removing device for fuel feed system of internal combustion engine |
| US6901916B2 (en) | 2001-07-30 | 2005-06-07 | Mikuni Corporation | Fuel discharge apparatus having a vapor removal system, and internal combustion engine fuel supply system having such fuel discharge apparatus |
| CN100404844C (en) * | 2001-07-30 | 2008-07-23 | 株式会社三国 | Vapor removing device for fule feed system of internal combustion engine |
| US7901572B2 (en) * | 2007-04-26 | 2011-03-08 | Nifco Inc. | Fuel filter apparatus |
| CN102374083A (en) * | 2011-11-26 | 2012-03-14 | 蚌埠金威滤清器有限公司 | Modularized fuel oil alarm coarse filter |
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