JPS60240863A - Pressure regulator of fuel injecting device for engine - Google Patents

Pressure regulator of fuel injecting device for engine

Info

Publication number
JPS60240863A
JPS60240863A JP59098426A JP9842684A JPS60240863A JP S60240863 A JPS60240863 A JP S60240863A JP 59098426 A JP59098426 A JP 59098426A JP 9842684 A JP9842684 A JP 9842684A JP S60240863 A JPS60240863 A JP S60240863A
Authority
JP
Japan
Prior art keywords
valve
pressure chamber
fuel
diaphragm
valve seat
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
Application number
JP59098426A
Other languages
Japanese (ja)
Inventor
Hisaharu Arai
荒井　久治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisan Industry Co Ltd
Original Assignee
Aisan Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aisan Industry Co Ltd filed Critical Aisan Industry Co Ltd
Priority to JP59098426A priority Critical patent/JPS60240863A/en
Publication of JPS60240863A publication Critical patent/JPS60240863A/en
Pending legal-status Critical Current

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
    • F02M69/54—Arrangement of fuel pressure regulators
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
    • G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane
    • G05D16/0658—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane characterised by the form of the obturator

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

PURPOSE:To improve sealing ability of a valve part, by a method wherein a valve, which controls opening and closing of the return port of a combustion pressure chamber, and a valve seat, with which the valve makes contact, are formed by a particular material, and an auxiliary sheet surface is formed on the outer peripheral surface of each of the two members. CONSTITUTION:The interior of a regulator body 1 is divided into a negative pressure chamber 5 and a combustion pressure chamber 8 by means of a diaphragm 2. A valve holder 3 is integrally mounted to the central part of the diaphragm 2, and a valve 15 is mounted in an engaging hole 3a formed in the central part of the under surface of the holder. A cylindrical fuel return port 10 is formed in the central part of the interior of a combustion pressure chamber 8, and the upper end surface of the return port is formed as a valve seat 12. In which case, for example, the valve 15 is formed by a resilient material, and the valve seat 12 is formed by a hard material. Auxiliary seat surfaces 16 and 17, positioned opposite to each other, are formed on partial parts of a valve holder 3, located to the outer peripheral parts of the valve 15 and the valve sheet 12, and a reinforcing part 13.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、エンジン用燃料噴射装置のインジェクタに加
わる燃圧を、インテークマニホルド内の吸気圧に対して
常に一定（山（燃圧と吸気圧とのｔが約２．５５Ｎｆ／
ｉ）に保つべく調整するためのプレッシャレギュレータ
に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention maintains the fuel pressure applied to the injector of an engine fuel injection device at a constant constant (peak (peak) (the difference between the fuel pressure and the intake pressure) with respect to the intake pressure in the intake manifold. t is approximately 2.55Nf/
i) This relates to a pressure regulator for adjusting to maintain the pressure.

（従来の技術） 一般にこの種のプレッシャレキコレータはその本体の内
部がダイアフラムにより、インテークマニホルドの吸気
圧を受ける負圧室と、燃料供給ポートおよび燃料リター
ンボー１−を右づる燃圧室どに分割され、このダイアフ
ラムの動きに連動するバルブによって上記のリターンボ
ートを開閉！ｌＩ御するように構成されている。そして
、上記のバルブおよびリターンボート側のバルブシート
は共に金属等の剛質素材で形成されているため、上記ダ
イアフラムの動きによってはシートに対してバルブが傾
いて接触する場合があり、この結果はシール性が適正に
保持されず、燃料漏れを招くこととなる。(Prior art) In general, this type of pressure requillor has a diaphragm that divides the inside of its main body into a negative pressure chamber that receives the intake pressure of the intake manifold, and a fuel pressure chamber that is located to the right of the fuel supply port and fuel return bow. The above return boat is opened and closed by a valve that is linked to the movement of this diaphragm! It is configured to control the II. Since both the above-mentioned valve and the valve seat on the return boat side are made of a rigid material such as metal, depending on the movement of the above-mentioned diaphragm, the valve may come into contact with the seat at an angle. Seal performance will not be maintained properly, leading to fuel leakage.

この対応策として上記のダイアフラム側に対し、バルブ
をボールによって球面支持することにより、ダイアフラ
ムの動きに関係なく、バルブの姿勢を修正するように構
成したものがある（例えば特公昭４９−３７０４９号公
報参照）。As a countermeasure to this problem, there is a structure in which the valve is spherically supported by a ball on the diaphragm side, so that the posture of the valve is corrected regardless of the movement of the diaphragm (for example, Japanese Patent Publication No. 49-37049) reference).

（発明が解決しようとする問題点） ところが、上記の構成においてもバルブとバルブシート
との接触性を良好に維持するには高喰の仕上げ精度が要
求され、またこれら相互の耐摩耗性を高めるためには焼
き入れ等といった熱処理を必要とし、かつ素材もステン
レススチール等の高級材料が使われている。これに加え
、上記のバルブはボールに結合され、かつこのボールは
ダイアフラム側に対し球面支持された構成であるため、
その構造が複雑となり、またバルブ姿勢の修正が良好に
なされるように製作するには各部の寸法精度に充分な配
慮が必要であって、結果的に製品コストの大幅な増大を
招くこととなる。(Problem to be Solved by the Invention) However, even in the above configuration, high finishing accuracy is required to maintain good contact between the valve and the valve seat, and it is necessary to improve the mutual wear resistance of the valve and the valve seat. This requires heat treatment such as hardening, and high-quality materials such as stainless steel are used. In addition, since the above-mentioned valve is connected to a ball, and this ball is supported spherically on the diaphragm side,
The structure becomes complicated, and sufficient consideration must be given to the dimensional accuracy of each part in order to manufacture it so that the valve position can be corrected well, resulting in a significant increase in product cost. .

（発明の目的） 本発明の目的は、構造簡単でかつ高級素材や特殊な仕上
げを必要とすることなく、バルブとバルブシートとの間
のシール性を高めることができ、しかもダイアフラムの
動きに関係なく、バルブシートに対するバルブの姿勢を
常に適正に修正することができるエンジン用燃料噴射装
置におけるプレッシャレギュレータを提供することであ
る。(Objective of the Invention) The object of the present invention is to improve the sealing performance between the valve and the valve seat with a simple structure, without requiring high-grade materials or special finishing, and to improve the sealing performance between the valve and the valve seat. It is an object of the present invention to provide a pressure regulator for an engine fuel injection device that can always appropriately correct the attitude of a valve with respect to a valve seat.

（発明の構成） かかる目的は、バルブあるいはバルブシートのいずれか
一方を剛質の素材で形成し、かつ他方を弾性素材で形成
するとともに、これらバルブおよびバルブシートの外周
部に共に剛質の素材より成る補助シート面を形成するこ
とｋよって達成される。(Structure of the Invention) This object is to form either the valve or the valve seat with a rigid material, and the other with an elastic material, and to form a rigid material on the outer periphery of both the valve and the valve seat. This is achieved by forming an auxiliary sheet surface consisting of:

（実施例） 以下、本発明の構成を図面で示す実施例に従って具体的
に説明する。(Example) Hereinafter, the configuration of the present invention will be specifically described according to an example shown in the drawings.

エンジン用燃料噴射装置の概略を表わした第３図におい
て、燃料タンクＡから各インジェクタＦに通じる燃料供
給パイプＩの経路中には燃料タンパルセーションダンパ
Ｅ１および上記の燃料供給パイプ■から各インジェクタ
Ｆに送られてくる燃圧を調整するためのプレッシャレギ
ュレータ！−１がそれぞれ配設されている− このプレッシャレギュレータＨを断面で表した第１図に
おいて、そのレギュレータ本体１はロアボディ１ａとア
ッパカバー１ｂとから構成されている。ロアボディ１ａ
とアッパカバー１ｂとの結合部におけるこれら相互間に
はダイアフラム２の外周部分が挟み込まれた状態で固定
されており、このダイアフラム２によってレギュレータ
本体１の内部は上記アッパカバー１ｂ側の負圧室５と、
ロアボディ１ａ側の燃圧室８とに区分されている。In FIG. 3, which schematically shows the fuel injection system for an engine, there is a fuel tampersation damper E1 in the route of the fuel supply pipe I leading from the fuel tank A to each injector F, and a fuel tampersation damper E1 from the fuel supply pipe 2 to each injector F. Pressure regulator to adjust the fuel pressure sent to! In FIG. 1, which shows the pressure regulator H in cross section, the regulator main body 1 is composed of a lower body 1a and an upper cover 1b. Lower body 1a
The outer circumferential portion of a diaphragm 2 is sandwiched and fixed between these at the joint between the upper cover 1b and the upper cover 1b, and the inside of the regulator main body 1 is connected to the negative pressure chamber 5 on the upper cover 1b side by this diaphragm 2. and,
It is divided into a fuel pressure chamber 8 on the lower body 1a side.

この負圧室５は、アッパカバー１ｂに一体に形成された
接続バイブロおよび第３図のパイプＧを通じて図示しな
いエンジンのインテークマニホルドに連通される。This negative pressure chamber 5 is communicated with an intake manifold of the engine (not shown) through a connecting vibro formed integrally with the upper cover 1b and a pipe G shown in FIG. 3.

一方、上記の燃圧室８は上記燃料供給パイプＩに接続さ
れる供給ポート９を有するとともに、この燃圧室８の内
部中心には筒状の燃料リターンポート１０が形成されて
いる。このリターンポート１０はこれを延長した形でロ
アボディ１ａの底面から一体に突出させた接続パイプ１
１を有し、この接続パイプ１１は第３図のリターンパイ
プＪを通じて前記燃料タンク△に接続されている。なお
、燃圧室８の内部においてリターンポート１０の外周と
ロアボディ１ａの内周面とを結合している補強部１３に
は、この補強部１３の上下へ燃料が自由に流通するよう
に複数の孔１４がありられでいる。On the other hand, the fuel pressure chamber 8 has a supply port 9 connected to the fuel supply pipe I, and a cylindrical fuel return port 10 is formed at the center of the interior of the fuel pressure chamber 8. This return port 10 is an extension of the connection pipe 1 that integrally projects from the bottom surface of the lower body 1a.
1, and this connecting pipe 11 is connected to the fuel tank Δ through a return pipe J shown in FIG. The reinforcing portion 13 that connects the outer circumference of the return port 10 and the inner circumferential surface of the lower body 1a inside the fuel pressure chamber 8 has a plurality of holes so that fuel can freely flow up and down the reinforcing portion 13. 14 is blessed.

さて上記ダイアフラム２の中心部には、第１図の一部を
拡大して表わした第２図からも明らかなようにバルブホ
ルダ３とシェル４とが共にダイアフラム２と一体化を成
すように取りつけられている。このシェル４は前記の負
圧室５内において、ここに組み込まれているコンプレッ
ションスプリング７を受けている。また、上記のバルブ
ホルダ３の下面、すなわち前記の燃圧室８に対向する面
の中央部には嵌合孔３ａが形成されている。この嵌合孔
３ａの内部にはゴム又は合成樹脂等の弾性素材で形成さ
れたバルブ１５が組み込まれ、かつこのバルブホルダ３
と一体的に接合されている。Now, as is clear from FIG. 2, which is a partially enlarged view of FIG. It is being This shell 4 receives within the negative pressure chamber 5 a compression spring 7 incorporated therein. Further, a fitting hole 3a is formed in the center of the lower surface of the valve holder 3, that is, the surface facing the fuel pressure chamber 8. A valve 15 made of an elastic material such as rubber or synthetic resin is incorporated into the fitting hole 3a, and the valve holder 3
is integrally joined with.

一方、前記燃料リターンボート１０の上端面は、上記の
バルブ１５に対するバルブシート１２として構成されて
おり、バルブ１５はダイアフラム２の動きに伴い、この
バルブシート１２に対しての密着あるいは離反動作をな
し、もってリターンボート１０の開閉を行なうのである
。On the other hand, the upper end surface of the fuel return boat 10 is configured as a valve seat 12 for the valve 15, and the valve 15 moves into close contact with or away from the valve seat 12 as the diaphragm 2 moves. , thereby opening and closing the return boat 10.

上記のバルブ１５およびバルブシート１２の外周部に位
置するバルブホルダ３および補強部１３の一部は、それ
ぞれ互いに対向する補助シート面１６．１７となってい
る。これら両補助シート面１６．１７は当然のことなが
らそのバルブホルダ３および補強部１３と同じ金属材（
剛質素材）で形成されていることとなる。そして、上記
のバルブ１５はその補助シート面１６かられずかに突出
）シた寸法に設定されており、ダイアフラム２“の動き
に基づいてバルブ１５がバルブシート１２に対して適正
な姿勢を保ちつつ移動してきた場合には、まずこのバル
ブ１５がバルブシート１２に接触する。この後、バルブ
１５がバルブシート１２との密着性を高めるべく弾性変
形を起すことによって今度は上記の両補助シート面１６
．１７が接触することとなる。Parts of the valve holder 3 and the reinforcing portion 13 located on the outer periphery of the valve 15 and the valve seat 12 serve as auxiliary seat surfaces 16 and 17 facing each other, respectively. These two auxiliary seat surfaces 16 and 17 are, of course, made of the same metal material as the valve holder 3 and reinforcing part 13 (
It is made of a rigid material. The above-mentioned valve 15 is set to have a dimension that slightly protrudes from the auxiliary seat surface 16, and the valve 15 maintains an appropriate posture with respect to the valve seat 12 based on the movement of the diaphragm 2''. When the valve 15 moves, the valve 15 first comes into contact with the valve seat 12. After that, the valve 15 elastically deforms in order to improve its adhesion with the valve seat 12, and then both of the above-mentioned auxiliary seat surfaces 16
．． 17 will come into contact.

なお、バルブ１５は前記バルブホルダー３の嵌合孔３ａ
底面に対応する部分のみを接合させ、これによってその
弾性変形特性を有効に発揮させるように構成している。Note that the valve 15 is inserted into the fitting hole 3a of the valve holder 3.
It is constructed so that only the portion corresponding to the bottom surface is joined, thereby effectively demonstrating its elastic deformation characteristics.

また、共に金属素材で形成されているバルブシート１２
とその補助シート１７とは互いに同一面となるように構
成した方が、その精度の維持及び管理上右利である。Also, the valve seat 12 is both made of metal material.
It is advantageous for the maintenance and management of accuracy to configure the auxiliary sheet 17 and the auxiliary sheet 17 to be on the same plane.

上記の構成において燃料供給パイプＩから上記の各イン
ジェクタＦに作用している燃圧どインテークマニホルド
の吸気負圧との差が大きくなると（２，５５Ｎ９／ｃｎ
以上になると）、プレッシャレギュレータＨの前記ダイ
アフラム２がそのスプリング７に抗して第１図の上方へ
移動することとなる。この結果、バルブ１５はバルブシ
ート１２がら浮き上がり、燃圧室８の燃料リターンボー
ト１Ｏが開放される。これにより、余分な燃料は第３図
で示すリターンパイプＪを通じて燃料タンク△に戻され
、燃圧とインテークマニホルドの吸気負圧との差を常に
一定に保つというプレッシャレギュレータＨとしての機
能が果されることとなる。In the above configuration, if the difference between the fuel pressure acting from the fuel supply pipe I to each injector F and the intake negative pressure of the intake manifold becomes large (2,55N9/cn
above), the diaphragm 2 of the pressure regulator H will move upward in FIG. 1 against the spring 7 thereof. As a result, the valve 15 is lifted off the valve seat 12, and the fuel return boat 1O of the fuel pressure chamber 8 is opened. As a result, excess fuel is returned to the fuel tank △ through the return pipe J shown in Figure 3, and it functions as a pressure regulator H that always keeps the difference between the fuel pressure and the negative intake pressure of the intake manifold constant. It happens.

さて、上記の負圧室５に作用している吸気負圧ど燃圧室
８に作用している燃圧との差が一定に保たれると、ダイ
アフラム２はそのスプリング７の作用によって下方に押
し下げられ、これに伴ってバルブ１５はそのバルブシー
ト１２に押しつけられる。このとき、弾性素材であるバ
ルブ１５は剛質素材であるバルブシート１２に押しつけ
られて弾性変形し、この弾性変形による密着性によって
バルブ１５とバルブシート１２との間のシール性は良好
に保持される。Now, when the difference between the intake negative pressure acting on the negative pressure chamber 5 and the fuel pressure acting on the fuel pressure chamber 8 is kept constant, the diaphragm 2 is pushed downward by the action of the spring 7. Accordingly, the valve 15 is pressed against the valve seat 12. At this time, the valve 15, which is an elastic material, is pressed against the valve seat 12, which is a rigid material, and is elastically deformed, and the tightness caused by this elastic deformation maintains good sealing between the valve 15 and the valve seat 12. Ru.

また、上記のダイアフラム２が仮にいずれかの側へ傾い
て移動した場合には、バルブシート１２に対するバルブ
１５の接触に先立って共に剛質素材である前記の補助シ
ート面１６．１７が互いにシート１２に対して正規の平
行な姿勢に修正される。Furthermore, if the diaphragm 2 were to tilt to either side and move, the auxiliary seat surfaces 16 and 17, both of which are made of rigid material, would move toward each other before the valve 15 came into contact with the valve seat 12. The position is corrected to normal parallel to .

さらに、上記のバルブ１５がバルブシート１２に押しつ
けられて弾性変形する場合、これら相互間のシール性を
保持するに必要な量だけバルブ１５が変形した後は、今
度は前記の両補助シート面１６．１７が接触し、もって
弾性素材であるバルブ１５が過度に変形するといった事
態が回避される。Furthermore, when the above-mentioned valve 15 is pressed against the valve seat 12 and deforms elastically, after the valve 15 is deformed by the amount necessary to maintain the sealing property between them, the above-mentioned auxiliary seat surfaces 16 This prevents the valve 15, which is made of an elastic material, from being excessively deformed due to contact between the valves 15 and 17.

上記の第１図及び第２図に示す実施例では、バルブ１５
を弾性素材で形成し、バルブシート１２を金属等の剛質
素材で形成した場合について説明したが、これら相υ間
の素材は全く逆の関係に設定してもよい。すなわち、第
４図は前記リターンボート１０の端面にゴムあるいは合
成樹脂などの弾性素材よりなる環状のバルブシート１１
２を固定し、バルブ１１５は第１図及び第２図で示す実
施例における金属（剛質素材）のバルブホルダ３をその
まま用いた構造となっている。なお、この第４図で示す
実施例においてはバルブシート１１２をその外周の補助
シート面１７から若干突出させた寸法に設定し、バルブ
１１５はその外周の補助シート面１６ど同一面となるよ
うに設定されている。この第４図で示ず実施例においＣ
その機能は第１図及び第２図で示す実施例の場合と全く
同様であるので詳しい説明は省略する。In the embodiment shown in FIGS. 1 and 2 above, the valve 15
Although the case has been described in which the valve seat 12 is formed of an elastic material and the valve seat 12 is formed of a rigid material such as metal, the materials between these phases υ may be set in a completely opposite relationship. That is, FIG. 4 shows an annular valve seat 11 made of an elastic material such as rubber or synthetic resin on the end surface of the return boat 10.
2 is fixed, and the valve 115 has a structure that uses the valve holder 3 made of metal (rigid material) as is in the embodiment shown in FIGS. 1 and 2. In the embodiment shown in FIG. 4, the valve seat 112 is dimensioned to slightly protrude from the auxiliary seat surface 17 on its outer periphery, and the valve 115 is flush with the auxiliary seat surface 16 on its outer periphery. It is set. In this example, which is not shown in FIG.
Since its function is exactly the same as that of the embodiment shown in FIGS. 1 and 2, detailed explanation will be omitted.

（発明の効果） 以上のように本発明は、バルブあるいはバルブシートの
いずれか一方を弾性素材で形成し、使方を剛質素材で形
成したことにより、この弾性素材の変形による密着機能
によってバルブとバルブシートとの間のシール性が向上
され、これによって剛質素材側においては特殊な高級素
材を用いたり、特殊仕上げを施すといった必要がなく、
しかもバルブとバルブシートとは剛質素材と弾性素材と
の接触であることから、剛質素材側の耐摩耗性を得るた
めに特殊な焼き入れ等の処理をすることが不要となり、
もってプレッシャレギュレータとしての製品コストの低
減を図ることができる。(Effects of the Invention) As described above, in the present invention, either the valve or the valve seat is made of an elastic material, and the valve seat is made of a rigid material. This improves the sealing performance between the valve seat and the valve seat, and there is no need to use special high-quality materials or apply special finishes on the rigid material side.
Moreover, since the valve and valve seat are in contact with a rigid material and an elastic material, there is no need for special treatment such as hardening to obtain wear resistance on the rigid material side.
As a result, the cost of the product as a pressure regulator can be reduced.

さらに、本発明はバルブおよびバルブシートのそれぞれ
の外周部に剛質素材よりなる補助シート面を構成してい
るので、例えばダイアフラムが傾いて移動した場合には
、これらの補助シート面が当接してバルブシートに対す
るバルブの姿勢を適正に修正することができ、これによ
ってもバルブおよびバルブシートの間のシール性が常に
適正に維持される。しかも、上記の補助シート面によっ
てバルブあるいはバルブシートの弾性変形が一定の範囲
に規制され、これによって弾性素材の過度の変形による
劣化といった不都合を未然に防止でき、もってその耐久
性を向上させることかできる。Furthermore, in the present invention, auxiliary seat surfaces made of a rigid material are formed on the outer periphery of each of the valve and the valve seat, so that, for example, when the diaphragm tilts and moves, these auxiliary seat surfaces come into contact with each other. The posture of the valve relative to the valve seat can be appropriately corrected, and thereby the sealing performance between the valve and the valve seat is always properly maintained. Moreover, the elastic deformation of the valve or valve seat is regulated within a certain range by the above-mentioned auxiliary seat surface, thereby preventing inconveniences such as deterioration due to excessive deformation of the elastic material, thereby improving its durability. can.

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

図面は本発明の一実施例を示し、第１図はプレッシャレ
ギュレータの断面図、第２図は第１図の要部を拡大して
表した断面図、第３図はエンジン用燃料噴射装置の概略
を表した説明図、第４図は本発明の異なる実施例を第２
図との対応によって表した断面図である。 １・・・レギュレータ本体　２・・・ダイアフラム５・
・・負　圧　室　８・・・燃　圧　室９・・・燃料供給
ボート １０・・・燃料リターンポート １２．１１２・・・バルブシート １５、１１５・・・バ　ル　ブ 八・・・燃料タンク　Ｆ・・・インジエクタト・・プレ
ッシャレギュレータ ■・・・燃料供給パイプ Ｊ・・・リターンパイプ 出願人　愛三工業株成金ネ１ 代理人　弁理士　岡　１）　英　愚 策　１　図 第　２　図 ５The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view of a pressure regulator, FIG. 2 is an enlarged sectional view of the main part of FIG. A schematic explanatory diagram, FIG. 4, shows a second embodiment of the present invention.
FIG. 3 is a cross-sectional view corresponding to the figure. 1...Regulator body 2...Diaphragm 5.
...Negative pressure chamber 8...Fuel pressure chamber 9...Fuel supply boat 10...Fuel return port 12.112...Valve seats 15, 115...Valve 8...Fuel tank F ...Injector...Pressure regulator■...Fuel supply pipe J...Return pipe Applicant: Aisan Kogyo Co., Ltd. Seikinne 1 Agent: Patent attorney Oka 1) Eiji Yosaku 1 Figure 2 Figure 5

Claims (1)

【特許請求の範囲】[Claims] レギュレータ本体の内部がダイアフラムににってインテ
ークマニホルドの吸気圧を受（うる負圧室と、インジェ
クタに通じる燃料供給パイプに連通ずる供給ボートおよ
び燃料リターンパイプに連通ずるリターンボートを有す
る燃圧室とに分υｊされ、前記ダイアフラムの動きに連
動するバルブによって燃圧室のリターンボートを開閉制
御覆るように構成したプレッシャレギュレータであって
、前記のバルブあるいはこのバルブが接触づ゛るリター
ンポート側のバルブシートのいずれか一方を剛質の素材
で形成し、かつ他方を弾性素材で形成し、しかもこれら
バルブおよびバルブシートの外周部には共に剛質の素材
より成る補助シート面を形成したことを特徴とするエン
ジン用燃料噴１）Ｊ装置におけるプレッシャレギュレー
タ。The inside of the regulator body rests on a diaphragm and receives the intake pressure of the intake manifold (negative pressure chamber), and a fuel pressure chamber that has a supply boat that communicates with the fuel supply pipe leading to the injector and a return boat that communicates with the fuel return pipe. A pressure regulator is configured to control the opening and closing of a return port of a fuel pressure chamber by a valve that is separated by υj and is linked to the movement of the diaphragm, and the pressure regulator is configured to control the opening and closing of a return port of a fuel pressure chamber by a valve that is linked to the movement of the diaphragm, and the pressure regulator is configured to cover the opening and closing of the return port of the fuel pressure chamber by a valve that is linked to the movement of the diaphragm. One of the valves is made of a rigid material, the other is made of an elastic material, and an auxiliary seat surface made of a rigid material is formed on the outer periphery of both the valve and the valve seat. Engine fuel injection 1) Pressure regulator in J device.
JP59098426A 1984-05-15 1984-05-15 Pressure regulator of fuel injecting device for engine Pending JPS60240863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59098426A JPS60240863A (en) 1984-05-15 1984-05-15 Pressure regulator of fuel injecting device for engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59098426A JPS60240863A (en) 1984-05-15 1984-05-15 Pressure regulator of fuel injecting device for engine

Publications (1)

Publication Number Publication Date
JPS60240863A true JPS60240863A (en) 1985-11-29

Family

ID=14219479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59098426A Pending JPS60240863A (en) 1984-05-15 1984-05-15 Pressure regulator of fuel injecting device for engine

Country Status (1)

Country Link
JP (1) JPS60240863A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62214266A (en) * 1986-03-17 1987-09-21 Nippon Denso Co Ltd Fuel pressure regulator
FR2731252A1 (en) * 1995-03-02 1996-09-06 Walbro Corp By-pass pressure control unit for IC engine fuel distribution circuit
WO1998054462A1 (en) * 1997-05-27 1998-12-03 Robert Bosch Gmbh Modulating pressure valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62214266A (en) * 1986-03-17 1987-09-21 Nippon Denso Co Ltd Fuel pressure regulator
FR2731252A1 (en) * 1995-03-02 1996-09-06 Walbro Corp By-pass pressure control unit for IC engine fuel distribution circuit
WO1998054462A1 (en) * 1997-05-27 1998-12-03 Robert Bosch Gmbh Modulating pressure valve

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