JP2531136B2 - Fuel pressure regulator - Google Patents
Fuel pressure regulatorInfo
- Publication number
- JP2531136B2 JP2531136B2 JP61058986A JP5898686A JP2531136B2 JP 2531136 B2 JP2531136 B2 JP 2531136B2 JP 61058986 A JP61058986 A JP 61058986A JP 5898686 A JP5898686 A JP 5898686A JP 2531136 B2 JP2531136 B2 JP 2531136B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- fuel
- valve
- opening
- receiving 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.)
- Expired - Lifetime
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Safety Valves (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は燃料調圧器に関するものである。TECHNICAL FIELD The present invention relates to a fuel pressure regulator.
従来より、例えば電子制御式燃料噴射装置を備えた車
両用内燃機関の燃料配管系においては、燃料噴射弁より
噴射される燃料の圧力を吸気管内の圧力に対して所定の
圧力差に維持するための燃料調圧器が設けられている。
このような燃料調圧器においては、燃料室内の圧力を調
整する為に、流出される燃料を調量する弁が流出管入口
に設けられている。また、内燃機関の再始動性を良くす
る為、燃料室内の圧力を内燃機関停止後においても保持
する必要があり、内燃機関停止時には、前記弁により流
出管を閉塞させることにより、燃料を燃料室内に保持す
る構成であった(例えば実開昭57−99959号、実開昭56
−143565号)。Conventionally, for example, in a fuel piping system of a vehicle internal combustion engine equipped with an electronically controlled fuel injection device, in order to maintain the pressure of fuel injected from a fuel injection valve at a predetermined pressure difference with respect to the pressure in the intake pipe. Is equipped with a fuel pressure regulator.
In such a fuel pressure regulator, in order to adjust the pressure in the fuel chamber, a valve for adjusting the amount of fuel flowing out is provided at the outflow pipe inlet. In addition, in order to improve the restartability of the internal combustion engine, it is necessary to maintain the pressure in the fuel chamber even after the internal combustion engine is stopped. It was designed to be held at the same time (for example, No. 57-99959, No. 56, No. 56, No.
-143565).
しかしながら、この閉塞状態は、それぞれ金属面から
なるシール面を衝合することによりなされているもので
ある為、そのシール性の向上を図るためにこれらのシー
ル面の面仕上げを非常に高精度に行わねばならないとい
う問題があった。However, since this closed state is achieved by abutting the seal surfaces made of metal surfaces, the surface finish of these seal surfaces is made with extremely high accuracy in order to improve the sealing performance. There was a problem that had to be done.
また、前記弁を弾性材料としてシール性を良くした構
成(例えば特開昭58−214077号)もあるが、この弾性部
材が高温燃料にされされることによりへたり、膨潤等に
よる形状変化を生じる為、流出燃料の調量に影響を及ぼ
し、燃料室の圧力が適切に調整されないという問題点が
あった。There is also a configuration in which the valve is made of an elastic material to improve the sealing property (for example, Japanese Patent Laid-Open No. 58-214077). However, when the elastic member is exposed to high temperature fuel, the elastic member is liable to change its shape due to swelling. Therefore, there is a problem in that the amount of outflowing fuel is affected and the pressure in the fuel chamber is not properly adjusted.
また、特開昭60−240863号のように、弾性素材(材
料)の変形を防止するために剛質素材どうしを当接させ
る補助シートを設けるものも知られているが、燃料圧力
を所定圧力に維持するために開弁閉弁の繰り返しのたび
に弾性素材が繰り返して変形するため弾性素材の変形は
防止しきれなかった。さらに弾性素材が変形すると、剛
質素材どうしを当接させた補助シートのために弾性素材
の当接部に隙間を生じることとなってシール性が低下す
るおそれがあった。このように弾性材料を弁部に用いた
構成では、シール性を重視した弾性材料の変形しやすさ
のために正確な圧力調整が実現できない場合があって、
正確な圧力調整と、長期間にわたる優れたシール性との
両立が困難であった。Also, as in Japanese Patent Laid-Open No. 60-240863, there is known one in which an auxiliary sheet is provided to bring rigid materials into contact with each other in order to prevent deformation of the elastic material (material). In order to maintain the above value, the elastic material is repeatedly deformed each time the valve is opened and closed, so that the deformation of the elastic material cannot be prevented. Further, if the elastic material is deformed, a gap may be created in the contact portion of the elastic materials due to the auxiliary sheets in which the rigid materials are brought into contact with each other, which may deteriorate the sealing performance. In such a configuration in which the elastic material is used for the valve portion, accurate pressure adjustment may not be realized due to the easiness of deformation of the elastic material with an emphasis on the sealing property.
It was difficult to achieve both accurate pressure adjustment and excellent sealing performance over a long period of time.
そこで本発明は上記従来技術の問題点に鑑み、正確な
圧力調整を実現しながら、精密加工を用いずとも優れた
シール性を長期間に渡って得ることができる燃料調圧器
を提供することを目的とする。Therefore, in view of the problems of the above-mentioned conventional techniques, the present invention provides a fuel pressure regulator that can achieve an excellent sealing property for a long period of time without using precision processing while realizing accurate pressure adjustment. To aim.
そのため本発明においては、 燃料の圧力を所定圧力に調整する燃料調圧器におい
て、 加圧された燃料が導入される燃料室に設けられ、燃料
の圧力を受けて、この圧力に応じて変位する受圧部材
と、 前記燃料室に開口し、前記燃料室の燃料を流出させる
流出通路と、 前記流出通路に設けられるとともに開閉部に燃料シー
ルのための弾性部材が介装され、前記受圧部材の変位に
応じて前記流出通路を開閉する弁であって、前記燃料室
の燃料の圧力が前記所定圧力より低い開弁圧力以上のと
き開弁する開閉弁と、 前記流出通路に前記開閉弁と直列に設けられ、前記受
圧部材の変位に応じて前記流出通路も開閉する弁であっ
て、前記燃料室の圧力が前記所定圧力以上になるまで閉
弁し、前記燃料室の燃料の圧力が前記所定圧力以上にな
ると開弁して、前記燃料室の燃料の圧力を前記所定圧力
に維持する調量弁と を具備した構成としている。Therefore, in the present invention, in the fuel pressure regulator for adjusting the pressure of the fuel to a predetermined pressure, the pressure regulator is provided in the fuel chamber into which the pressurized fuel is introduced, receives the pressure of the fuel, and is displaced in accordance with this pressure. A member, an outflow passage that opens into the fuel chamber and allows the fuel in the fuel chamber to flow out, and an elastic member that is provided in the outflow passage and that is provided in the opening / closing portion for fuel sealing, and that is used for displacement of the pressure receiving member. A valve that opens and closes the outflow passage in response to the opening pressure when the fuel pressure in the fuel chamber is equal to or higher than the opening pressure that is lower than the predetermined pressure; and a valve that is provided in the outflow passage in series with the on-off valve. A valve that also opens and closes the outflow passage according to the displacement of the pressure receiving member, and is closed until the pressure in the fuel chamber becomes equal to or higher than the predetermined pressure, and the pressure of fuel in the fuel chamber is equal to or higher than the predetermined pressure. Then the valve opens Has a configuration that and a metering valve to maintain the pressure of fuel in the fuel chamber to the predetermined pressure.
本発明では、受圧部材が燃料圧力に応じて変位し、流
出通路において直列に設けられた開閉弁と調量弁とが受
圧部材の変位量に応じて流出通路を開閉する。In the present invention, the pressure receiving member is displaced according to the fuel pressure, and the on-off valve and the metering valve, which are provided in series in the outflow passage, open and close the outflow passage according to the displacement amount of the pressure receiving member.
特に本発明では、開閉弁が開弁する圧力と調量弁が開
弁する圧力とに差が与えられており、燃料調圧器として
維持すべき所定圧力よりも低い開弁圧力以上で開閉弁が
開弁し、燃料調圧器として維持すべき所定圧力以上で調
量弁が開弁するように構成されている。このため、燃料
室内の燃料圧力が上昇し開弁圧力に達するとまず開閉弁
が開弁し、さらに燃料圧力が上昇し所定圧力に達すると
調量弁が開弁して、燃料室の燃料が流出通路から流出し
て燃料圧力の上昇が抑えられる。そして、燃料室の燃料
圧力が所定圧力より低下しようとすると調量弁は再び閉
弁しこの調量弁の開閉動作により燃料室の燃料の圧力が
所定圧力に維持される。Particularly in the present invention, a difference is given to the pressure at which the on-off valve opens and the pressure at which the metering valve opens, and the on-off valve is opened at an opening pressure lower than the predetermined pressure to be maintained as the fuel pressure regulator. The valve is opened, and the metering valve is opened at a pressure equal to or higher than a predetermined pressure that should be maintained as the fuel pressure regulator. Therefore, when the fuel pressure in the fuel chamber rises and reaches the valve opening pressure, the on-off valve opens first, and when the fuel pressure further rises and reaches the predetermined pressure, the metering valve opens and the fuel in the fuel chamber The fuel pressure is prevented from rising from the outflow passage. When the fuel pressure in the fuel chamber is about to drop below the predetermined pressure, the metering valve is closed again, and the opening / closing operation of the metering valve maintains the fuel pressure in the fuel chamber at the predetermined pressure.
しかも本発明では開閉弁の開閉部に弾性部材が介装さ
れているため、この開閉弁の閉弁時には確実に流出通路
からの燃料流出が防止され、この開閉弁により確実なシ
ール性が確保されるとともに、この開閉弁の開弁圧力は
燃料調圧器として維持すべき所定圧力より低いため、燃
料圧力を所定圧力に調整するために開弁閉弁を繰り返す
調量弁に比べると弾性部材の変形の頻度が低減される。Moreover, in the present invention, since the elastic member is interposed in the opening / closing portion of the on-off valve, the fuel is surely prevented from flowing out of the outflow passage when the on-off valve is closed, and the on-off valve ensures a reliable sealing property. In addition, since the opening pressure of this on-off valve is lower than the predetermined pressure that should be maintained as a fuel pressure regulator, the elastic member is deformed more than a metering valve that repeats opening and closing to adjust the fuel pressure to a predetermined pressure. Frequency is reduced.
このように本発明においては、燃料のシールは主とし
て開閉弁が行い、燃料圧力の調整は主として調量弁が行
い、しかも開閉弁が開弁する開弁圧力を調量弁が開弁す
る所定圧力より低くするという構成を採用したから、調
量弁によって正確な燃料圧力の調整を実現しながら、開
閉弁に使用した弾性部材の変形を抑えて高いシール性を
長期間に渡って得ることができる。As described above, in the present invention, the fuel is mainly sealed by the on-off valve, the fuel pressure is mainly adjusted by the metering valve, and the valve opening pressure at which the on-off valve opens is the predetermined pressure at which the metering valve opens. By adopting the configuration of lowering the pressure, it is possible to obtain accurate sealing of the fuel over a long period of time by suppressing the deformation of the elastic member used for the on-off valve while realizing accurate fuel pressure adjustment by the metering valve. .
以下、本発明による一実施例を図面に基づいて説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
第1図に示される燃料調圧器1は、電子制御式燃料噴
射装置を備えた車両用内燃機関に搭載されるものであ
り、2は燃料室ハウジング、3は背圧室ハウジングで各
々コップ形状をした金属製である。4は薄肉の円盤状で
あって、例えば耐燃料性ゴムと基布との二重構造のダイ
ヤフラムであり、両ハウジング2,3の周縁はダイヤフラ
ム4の周縁を挟んでめられ、外気がハウジング2,3内
部に入らない様、又、燃料室5の燃料が背圧室6に、背
圧室6の空気が燃料室5に入らない様になっている。A fuel pressure regulator 1 shown in FIG. 1 is mounted on an internal combustion engine for a vehicle equipped with an electronically controlled fuel injection device, 2 is a fuel chamber housing, 3 is a back pressure chamber housing, and each has a cup shape. It is made of metal. Reference numeral 4 denotes a thin disk-shaped, for example, a diaphragm having a double structure of a fuel resistant rubber and a base cloth. The peripheral edges of both housings 2 and 3 are sandwiched by the peripheral edge of the diaphragm 4 and the outside air is exposed to the housing 2. The fuel in the fuel chamber 5 does not enter the back pressure chamber 6 and the air in the back pressure chamber 6 does not enter the fuel chamber 5.
ハウジング2には、図示しない燃料ポンプにより燃料
室5内に圧送された燃料を流入させる為の略円筒状の流
入管7と、燃料室5内から燃料を流出させて図示しない
燃料タンクへと返送する為の略円筒状の流出管8とが各
々取付板9、補強板10と共に溶接固定されている。また
流出管8の一端は燃料室5内に突入している。In the housing 2, a substantially cylindrical inflow pipe 7 for inflowing the fuel pumped into the fuel chamber 5 by a fuel pump (not shown), and a fuel flowing out from the fuel chamber 5 and returned to a fuel tank (not shown). A substantially cylindrical outflow pipe 8 for welding is fixed by welding together with a mounting plate 9 and a reinforcing plate 10. Further, one end of the outflow pipe 8 projects into the fuel chamber 5.
ところで、背圧室6内においては、ダイヤフラム4の
略中央に受け皿11が設けられており、ダイヤフラム4を
燃料室5側に付勢するようスプリング12がハウジング3
と受け皿11との間に配設されている。またハウジング3
には、図示しない吸気管のスロットル下流側からの負圧
を背圧室6内に伝える為のゴム管等が接続される動圧管
13が溶接固定されている。なお、ハウジング3の端部3a
を変形させることにより、スプリング12の付勢力は調整
される。前記受け皿11は、燃料室4よりダイヤフラム4
の略中央を貫通して突出したシール弁14によりダイヤフ
ラム4に対しめ固定されているものである。即ち、受
け皿11とシール弁14とによりダイヤフラム4を挟持して
いる。By the way, in the back pressure chamber 6, a tray 11 is provided in the substantial center of the diaphragm 4, and a spring 12 is provided to urge the diaphragm 4 toward the fuel chamber 5 side.
And the saucer 11 are arranged between them. Housing 3
Is a dynamic pressure pipe to which a rubber pipe or the like for transmitting a negative pressure from a throttle downstream side of an intake pipe (not shown) into the back pressure chamber 6 is connected.
13 is fixed by welding. The end 3a of the housing 3
By deforming, the biasing force of the spring 12 is adjusted. The tray 11 is provided with the diaphragm 4 from the fuel chamber 4.
It is fixed to the diaphragm 4 by a seal valve 14 which penetrates through substantially the center of the diaphragm. That is, the diaphragm 4 is held between the tray 11 and the seal valve 14.
さて、燃料室5内にいて、シール弁14端面に形成した
環状溝内にはフッ素ゴム等の弾性部材15が焼付固定さ
れ、前記流出管8の端面8aと対向している。この弾性部
材15は、内燃機関の休止時においては、スプリング12の
付勢力により、図のように端面8aに接しており、この場
合は6〜7kg重程度のスプリング力により流出管8の開
口部8bを閉塞している。Now, in the fuel chamber 5, an elastic member 15 such as fluororubber is baked and fixed in an annular groove formed on the end face of the seal valve 14 so as to face the end face 8a of the outflow pipe 8. This elastic member 15 is in contact with the end face 8a as shown in the figure by the urging force of the spring 12 when the internal combustion engine is at rest. In this case, the opening of the outflow pipe 8 is about 6 to 7 kg weight due to the spring force. Blocked 8b.
さらに流出管8の要部の違う角度による断面を示した
第2図も用いて説明する。Further, description will be given also with reference to FIG. 2 showing a cross section of a main part of the outflow pipe 8 at different angles.
流出管8内部には、略円柱状の調量弁16が挿入されて
おり、流出管8にめ固定されたばね受17との間に配設
されたばね18と当接して、シール弁14に対し軸方向に押
圧されている。この調量弁16は、シール弁14との当接部
分である頭部16aに球面が形成され、その球面の端縁16b
と接続する側面は円柱面であり、これは流出管8内周面
を液密を保持しながら調量弁16を強い摩擦を生じず摺動
させる為の弁部16cである。この弁部16cにおいて、端縁
16bより距離lだけ離れたところから長方形状の2つの
面取部16d,16eが互いに平行に形成され、前記ばね18と
の当接部分にまで至っている。そしてこの面取部16d,16
eと流出管8の内壁面との隙間は燃料通路19であり、こ
の調量弁16がlだけリフトされると弁部16cの面取部16
d,16eが流出管8の端面8aより出ることにより燃料室5
と連通される。A substantially cylindrical metering valve 16 is inserted into the outflow pipe 8, and comes into contact with a spring 18 provided between a spring receiver 17 fixed to the outflow pipe 8 and the sealing valve 14. It is pressed in the axial direction. This metering valve 16 has a spherical surface formed on a head portion 16a which is a contact portion with the seal valve 14, and an edge 16b of the spherical surface.
The side surface connected to is a cylindrical surface, which is a valve portion 16c for sliding the metering valve 16 without generating strong friction while keeping the inner peripheral surface of the outflow pipe 8 liquid-tight. The edge of this valve portion 16c
Two chamfered portions 16d and 16e having a rectangular shape are formed parallel to each other from a distance l away from 16b, and reach the contact portion with the spring 18. And this chamfer 16d, 16
The gap between e and the inner wall surface of the outflow pipe 8 is the fuel passage 19, and when the metering valve 16 is lifted by l, the chamfered portion 16 of the valve portion 16c.
When d and 16e come out from the end surface 8a of the outflow pipe 8, the fuel chamber 5
Is communicated with.
ここで、前記スプリング12の付勢力は、背圧室5の内
圧とダイヤフラム4の受圧面積とを考慮して、調量弁16
がlだけリフトされた位置において、燃料室5内の燃圧
が所定圧力となるよう設定されるものであり、ばね18の
付勢力は、スプリング12の付勢力より小さく、調量弁16
がダイヤフラム4と協動するシール弁14の動きに追随し
得るに十分なものとなっている。Here, the urging force of the spring 12 takes into consideration the internal pressure of the back pressure chamber 5 and the pressure receiving area of the diaphragm 4, and the metering valve 16
Is set so that the fuel pressure in the fuel chamber 5 becomes a predetermined pressure at a position lifted by l, the biasing force of the spring 18 is smaller than the biasing force of the spring 12, and the metering valve 16
Is sufficient to follow the movement of the sealing valve 14 in cooperation with the diaphragm 4.
そして、上記構成の燃料調圧器1においては、流入管
7より燃料室5へ流入された燃料が満たされると、燃料
室5内の圧力はダイヤフラム4に作用し、この圧力があ
る程度大きくなり、燃料調圧器として維持すべき所定圧
力より低い開弁圧力になると、ダイヤフラム4はスプリ
ング12の付勢力と背圧室6内の圧力とによって決まる圧
力に抗して背圧室6側に変位する。そして、このダイヤ
フラム4の変位に協動するシール弁14の弾性部材15が流
出管8の端面8aと離間されると開口部8bが開通される。
そして、ばね18の付勢力により頭部16aにおいての接触
を保ちながらシール弁14と連動する調量弁16も、その弁
部16cを強い摩擦を起こさず流出管8内壁面に摺接させ
ながら軸方向にリフトされるが、面取部16d,16eが流出
管8内にあれば燃料通路19は弁部16cにより閉じられて
おり、燃料室5とは連通していない。燃料室5内の圧力
がさらに上昇して前述の燃料調圧器として維持すべき所
定圧力以上になろうとする時点で、ダイヤフラム4に連
動して調量弁16は図示した位置よりlだけ変位し、弁部
16cの面取部16d,16eが流出管8外に突出することにより
燃料通路19は開放される。そして燃料室5の所定圧力を
維持する為に余剰燃料は燃料通路19、流出管8を経て図
示しない燃料タンクに返送される。一方、燃料室5の内
圧が所定圧力以下になろうとすると、ダイヤフラム4は
スプリング12により、燃料室5側へと付勢され、それに
連動して調量弁16の弁部16cが燃料通路19を閉じること
により燃料室5の燃圧降下を防ぐ。このように燃料調圧
器1は、調量弁16が燃料室5の圧力に応じて作動を繰り
返し、この調量弁16の作動ストロークにより、流量通路
19を流れる燃料の流出量が調量され、これにより燃料室
5の所定圧力が維持される。In the fuel pressure regulator 1 having the above-described structure, when the fuel flowing into the fuel chamber 5 from the inflow pipe 7 is filled, the pressure in the fuel chamber 5 acts on the diaphragm 4, and the pressure increases to some extent. When the valve opening pressure becomes lower than the predetermined pressure to be maintained as the pressure regulator, the diaphragm 4 is displaced toward the back pressure chamber 6 side against the pressure determined by the urging force of the spring 12 and the pressure inside the back pressure chamber 6. When the elastic member 15 of the seal valve 14 that cooperates with the displacement of the diaphragm 4 is separated from the end surface 8a of the outflow pipe 8, the opening 8b is opened.
Then, the metering valve 16 which is interlocked with the seal valve 14 while maintaining contact with the head portion 16a by the urging force of the spring 18 slides the valve portion 16c against the inner wall surface of the outflow pipe 8 without causing strong friction. However, if the chamfered portions 16d and 16e are in the outflow pipe 8, the fuel passage 19 is closed by the valve portion 16c and is not in communication with the fuel chamber 5. At the time when the pressure in the fuel chamber 5 further rises to reach the predetermined pressure to be maintained as the fuel pressure regulator described above, the metering valve 16 is displaced by 1 from the position shown in conjunction with the diaphragm 4, Valve
The fuel passage 19 is opened by the chamfered portions 16d and 16e of 16c projecting out of the outflow pipe 8. Then, in order to maintain the predetermined pressure in the fuel chamber 5, the surplus fuel is returned to the fuel tank (not shown) through the fuel passage 19 and the outflow pipe 8. On the other hand, when the internal pressure of the fuel chamber 5 is about to fall below a predetermined pressure, the diaphragm 4 is urged toward the fuel chamber 5 side by the spring 12, and in conjunction with this, the valve portion 16c of the metering valve 16 causes the fuel passage 19 to flow. The closing prevents the fuel pressure in the fuel chamber 5 from dropping. In this way, in the fuel pressure regulator 1, the metering valve 16 repeats the operation in accordance with the pressure in the fuel chamber 5, and the operation stroke of the metering valve 16 causes the flow passage to flow.
The outflow amount of the fuel flowing through 19 is adjusted so that the predetermined pressure in the fuel chamber 5 is maintained.
このような実施例によれば、内燃機関が停止し、即ち
この燃料調圧器1が非作動状態になった時は、スプリン
グ12の付勢力により弾性部材15が流出管8の端面8aに速
やかに着座して、図のように開口部8bを閉塞し、弾性を
有するシール面により確実にシールすることができる。
この結果流出管8に燃料が洩れるのを防止して燃料室5
の内圧を保持できるようになる為、内燃機関の再始動性
は非常に良好となる。また、このように弾性部材15でシ
ール性が確保されることによって、シール弁14および流
出管8の端面8aの加工に精度が要求されないので、加工
手間を省減してコストダウンを実現することができる。According to such an embodiment, when the internal combustion engine is stopped, that is, when the fuel pressure regulator 1 is in the non-operating state, the elastic member 15 quickly moves to the end face 8a of the outflow pipe 8 by the urging force of the spring 12. It is possible to sit down, close the opening 8b as shown in the figure, and reliably seal with the elastic sealing surface.
As a result, fuel is prevented from leaking into the outflow pipe 8 and the fuel chamber 5
Since the internal pressure can be maintained, the restartability of the internal combustion engine becomes very good. Further, since the sealing performance is ensured by the elastic member 15 in this manner, the sealing valve 14 and the end surface 8a of the outflow pipe 8 are not required to be processed with high precision, so that the processing labor can be reduced and the cost can be reduced. You can
また、このような燃料の流出を防止する為のシール弁
14と、流出燃料量を制御して燃料室5の所定圧力を保持
する為の調量弁16とをそれぞれ有する構成である為、た
とえ弾性部材15が高温、高圧の燃料にさらされ膨潤、へ
たり等の形状変化を生じたとしても流出燃料の調量には
全く影響しない。In addition, a seal valve to prevent such fuel outflow
14 and a metering valve 16 for controlling the amount of outflowing fuel to maintain a predetermined pressure in the fuel chamber 5, the elastic member 15 swells when exposed to high temperature and high pressure fuel. Even if a shape change such as a sag occurs, it does not affect the metering of the outflow fuel at all.
さらに優れたことに、シール弁14が作動して、開口部
8bが開放されても、調量弁16は一定ストロークlの間燃
料通路19を開放しない為、内燃機関運転中に弾性部材15
が流出管8の端面8aに衝接することはなく、弾性部材15
は痛むことがないので、長期にわたって卓抜したシール
性を確保できる。Even better, the seal valve 14 is activated
Even if 8b is opened, the metering valve 16 does not open the fuel passage 19 for a constant stroke l. Therefore, the elastic member 15 is operated during operation of the internal combustion engine.
Does not collide with the end surface 8a of the outflow pipe 8, and the elastic member 15
Since it does not hurt, it is possible to secure outstanding sealing properties over a long period of time.
また、シール弁14と調量弁16とが別の部材に形成され
たことにより、ダイヤフラム4に対するシール弁14の取
付位置がずれていたとしても、調量弁16は流出管8内
を、強い摩擦を起こさず摺動できる。さらに調量弁16の
頭部16aには球面が形成されていることにより、加工組
付誤差等によりばね18の付勢力が必ずしも正確な軸方向
に調量弁16を押圧しなくても、シール弁14と調量弁16と
は確実に接しながら連動することができ、燃料室5の圧
力に対応したダイヤフラム4の動きに正確に対応するこ
とができる。Further, since the seal valve 14 and the metering valve 16 are formed as separate members, even if the mounting position of the seal valve 14 with respect to the diaphragm 4 is deviated, the metering valve 16 is strong in the outflow pipe 8. Can slide without causing friction. Further, since the head portion 16a of the metering valve 16 is formed with a spherical surface, even if the urging force of the spring 18 does not necessarily press the metering valve 16 in an accurate axial direction due to a machining assembly error or the like, a seal is provided. The valve 14 and the metering valve 16 can be interlocked while surely contacting each other, and the movement of the diaphragm 4 corresponding to the pressure of the fuel chamber 5 can be accurately corresponded.
なおこの発明は上記実施例に制約されるものではな
い。The present invention is not limited to the above embodiment.
例えば調量弁とシール弁とを別の部材に設けた構成で
はなく、両者をひとつの部材にそれぞれ形成した構成と
しても良い。For example, the metering valve and the seal valve may not be provided in separate members, but both may be formed in one member.
また、この構成において、調量弁とシール弁とが設け
られた部材を、新たにダイヤフラムに固定された固定対
と接しながら協動させる構成としても良い。Further, in this configuration, a member provided with the metering valve and the seal valve may be configured to cooperate with a fixed pair newly fixed to the diaphragm while being in contact with the fixed pair.
以上述べたように本発明の構成および作用によると、
燃料のシールが主として開閉弁によりなされ、燃料圧力
の調整は主として調量弁によりなされるから、調量弁に
よって正確な燃料圧力の調整を実現しながら、開閉弁に
弾性部材を使用して高いシール性が得られ、閉弁時に燃
料室の燃料圧力を確実に保持できるとともに、その弾性
部材の変形を抑制して長期間に渡って確実なシール性を
得ることができるという優れた効果を奏する。As described above, according to the configuration and operation of the present invention,
The fuel is sealed mainly by the on-off valve, and the fuel pressure is adjusted mainly by the metering valve. Therefore, while achieving accurate fuel pressure adjustment by the metering valve, an elastic member is used for the on-off valve to achieve a high seal. And the fuel pressure in the fuel chamber can be reliably maintained when the valve is closed, and the elastic member can be prevented from being deformed to obtain a reliable sealing property for a long period of time.
第1図は本発明の一実施例による燃料調圧器を示す縦断
面図、第2図は第1図図示の燃料調圧器における要部の
別角度から見た縦断面図である。 1……燃料調圧器,4……ダイヤフラム,5……燃料室,7…
…流入管,8……流出管,8b……開口部,14……シール弁,1
5……弾性部材,16……調量弁。FIG. 1 is a vertical cross-sectional view showing a fuel pressure regulator according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a main portion of the fuel pressure regulator shown in FIG. 1 ... Fuel pressure regulator, 4 ... Diaphragm, 5 ... Fuel chamber, 7 ...
… Inflow pipe, 8 …… Outflow pipe, 8b …… Opening, 14 …… Seal valve, 1
5: Elastic member, 16: Metering valve.
Claims (3)
器において、 加圧された燃料が導入される燃料室に設けられ、燃料の
圧力を受けて、この圧力に応じて変位する受圧部材と、 前記燃料室に開口し、前記燃料室の燃料を流出させる流
出通路と、 前記流出通路に設けられるとともに開閉部に燃料シール
のための弾性部材が介装され、前記受圧部材の変位に応
じて前記流出通路を開閉する弁であって、前記燃料室の
燃料の圧力が前記所定圧力より低い開弁圧力以上のとき
開弁する開閉弁と、 前記流出通路に前記開閉弁と直列に設けられ、前記受圧
部材の変位に応じて前記流出通路も開閉する弁であっ
て、前記燃料室の圧力が前記所定圧力以上になるまで閉
弁し、前記燃料室の燃料の圧力が前記所定圧力以上にな
ると開弁して、前記燃料室の燃料の圧力を前記所定圧力
に維持する調量弁と を具備したことを特徴とする燃料調圧器。1. A fuel pressure regulator for adjusting a pressure of fuel to a predetermined pressure, the pressure receiving member being provided in a fuel chamber into which pressurized fuel is introduced, and which receives the pressure of the fuel and is displaced in accordance with the pressure. An outflow passage that opens into the fuel chamber and allows the fuel in the fuel chamber to flow out; and an elastic member for fuel sealing, which is provided in the outflow passage and is provided in the opening / closing portion, according to the displacement of the pressure receiving member. A valve for opening and closing the outflow passage, the valve being opened and closed when the fuel pressure in the fuel chamber is equal to or higher than the opening pressure lower than the predetermined pressure; and the inflow passage provided in series with the on-off valve. A valve that also opens and closes the outflow passage according to the displacement of the pressure receiving member, and is closed until the pressure in the fuel chamber becomes equal to or higher than the predetermined pressure, and the pressure of fuel in the fuel chamber becomes equal to or higher than the predetermined pressure. Then the valve opens and the fuel chamber A pressure regulator for maintaining the pressure of the fuel at the predetermined pressure.
れ、前記弾性部材としてのゴムを介して前記開口部と接
触し、前記受圧部材の変位に応じて前記開口部を開閉す
るシール弁と を備えることを特徴とする特許請求の範囲第1項に記載
の燃料調圧器。2. The opening / closing valve is supported by the pressure receiving member facing the opening of the outflow pipe in which the outflow passage is formed, and the opening of the opening / closing valve via rubber as the elastic member. The fuel pressure regulator according to claim 1, further comprising: a seal valve that is in contact with the pressure receiving member and opens and closes the opening according to the displacement of the pressure receiving member.
能に設けられ、 前記受圧部材の変位量が前記開閉弁の開弁変位量より大
きい所定ストローク以上となるまで前記流出通路の内壁
と摺接して前記流出通路を閉じ、前記受圧部材の変位量
が前記所定ストローク以上となると前記流出通路を開く
弁部(16c)を備えることを特徴とする特許請求の範囲
第1項に記載の燃料調圧器。3. The metering valve is provided inside the outflow passage so as to be movable according to the displacement of the pressure receiving member, and the displacement of the pressure receiving member is greater than a predetermined stroke which is larger than the valve opening displacement of the on-off valve. A valve portion (16c) that slides in contact with the inner wall of the outflow passage to close the outflow passage, and opens the outflow passage when the displacement amount of the pressure receiving member exceeds the predetermined stroke. 2. The fuel pressure regulator according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61058986A JP2531136B2 (en) | 1986-03-17 | 1986-03-17 | Fuel pressure regulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61058986A JP2531136B2 (en) | 1986-03-17 | 1986-03-17 | Fuel pressure regulator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62214266A JPS62214266A (en) | 1987-09-21 |
JP2531136B2 true JP2531136B2 (en) | 1996-09-04 |
Family
ID=13100167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61058986A Expired - Lifetime JP2531136B2 (en) | 1986-03-17 | 1986-03-17 | Fuel pressure regulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2531136B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2540434Y2 (en) * | 1988-01-27 | 1997-07-02 | 株式会社ミツバ | Fuel pressure control valve device |
US20140311597A1 (en) * | 2013-04-17 | 2014-10-23 | Continental Automotive Systems, Inc. | Compact Fuel Pressure Regulator |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51128030U (en) * | 1975-04-14 | 1976-10-16 | ||
US4204561A (en) * | 1977-09-08 | 1980-05-27 | Tom Mcguane Industries, Inc. | Fuel pressure regulator assembly |
JPS60240863A (en) * | 1984-05-15 | 1985-11-29 | Aisan Ind Co Ltd | Pressure regulator of fuel injecting device for engine |
-
1986
- 1986-03-17 JP JP61058986A patent/JP2531136B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS62214266A (en) | 1987-09-21 |
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