JPH0687665U - Fuel injection pump isobaric structure - Google Patents
Fuel injection pump isobaric structureInfo
- Publication number
- JPH0687665U JPH0687665U JP2767393U JP2767393U JPH0687665U JP H0687665 U JPH0687665 U JP H0687665U JP 2767393 U JP2767393 U JP 2767393U JP 2767393 U JP2767393 U JP 2767393U JP H0687665 U JPH0687665 U JP H0687665U
- Authority
- JP
- Japan
- Prior art keywords
- delivery valve
- valve
- delivery
- valve seat
- pressure valve
- 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.)
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Abstract
(57)【要約】 （修正有）
【目的】 ディーゼルエンジンの燃料噴射ポンプのデリ
ベリバルブの部分に設けた等圧弁の固定方法を簡潔に構
成する。
【構成】 筒型のデリベルバルブの内部に嵌装した突起
状のデリベリバルブシート６の内部に、戻し油路と等圧
弁付勢バネ５と上部バネ受け３と等圧弁２を嵌装し、デ
リベリバルブシートの上部に吸い戻し用オリフィス６ａ
を穿設した。また、上記デリベリバルブシートの内部に
戻し油路を穿設し、デリベリバルブシートとデリベリバ
ルブとの間に等圧弁付勢バネと上部バネ受けと等圧弁を
内装し、デリベリバルブの頂部に吸い戻し用オリフィス
を穿設した。また、筒型のデリベリバルブをデリベリバ
ルブシートに構成した孔状のバルブシートに接当し、デ
リベリバルブの内部に戻し油路を穿設し、デリベリバル
ブの内部に等圧弁付勢バネと上部バネ受けと等圧弁を内
装して、等圧弁シート体を嵌入し、その上方を抜け止め
固定し、等圧弁シート体に吸い戻し用オリフィスを穿設
した。
(57) [Summary] (Correction) [Purpose] The method of fixing the equal pressure valve provided in the delivery valve of the fuel injection pump of a diesel engine is simply configured. [Structure] A return oil passage, a constant pressure valve biasing spring 5, an upper spring receiver 3 and a constant pressure valve 2 are fitted inside a projecting delivery valve seat 6 fitted inside a tubular delivery valve, Orifice 6a for sucking back at the top of the veri-valve seat
Was drilled. In addition, a return oil passage is bored inside the delivery valve seat, and an equal pressure valve biasing spring, an upper spring receiver and an equal pressure valve are installed between the delivery valve seat and the delivery valve, and sucked back to the top of the delivery valve. An orifice was drilled. In addition, the cylindrical delivery valve is brought into contact with the hole-shaped valve seat configured in the delivery valve seat, a return oil passage is bored inside the delivery valve, and an equal pressure valve biasing spring and an upper spring receiver are installed inside the delivery valve. An equal pressure valve was installed inside, and an equal pressure valve seat was fitted, and the upper portion was fixed to prevent slipping off, and an orifice for sucking back was bored in the equal pressure valve seat.
Description
【０００１】[0001]
本考案はディーゼルエンジンの燃料噴射ポンプに設けた、吸い戻しにより燃料 吐出圧を等圧にする等圧弁の支持構造に関する。 The present invention relates to a support structure for a pressure equalizing valve provided in a fuel injection pump of a diesel engine for equalizing the fuel discharge pressure by sucking back.
【０００２】[0002]
従来から、燃料噴射ポンプにおいて、燃料吐出圧を等圧にする為に、吸い戻し 用オリフィスを設けて、等圧弁を配置する構造に関する技術は公知とされている のである。例えば、実開平３−９２５６３号公報や、実開平３−７１１６３号公 報や、実開平３−１０４１７１号公報に記載の技術の如くである。 BACKGROUND ART Conventionally, in a fuel injection pump, a technique related to a structure in which a suction return orifice is provided and a pressure equalizing valve is arranged in order to make the fuel discharge pressure equal, has been known. For example, it is like the technique described in Japanese Utility Model Laid-Open No. 3-92563, Japanese Utility Model Laid-Open No. 3-711163, and Japanese Utility Model Laid-Open No. 3-104171.
【０００３】[0003]
しかし、上記従来技術における燃料噴射ポンプの等圧弁構造の場合には、デリ ベリバルブの部分に設けた等圧弁を固定する為に、何等かの固定手段を別に設け る必要があったのである。これが組立の困難さやコスト上昇の原因となっていた ので、本考案においては、該デリベリバルブの部分に設けた等圧弁の固定方法を 簡潔に構成したものである。 However, in the case of the equal pressure valve structure of the fuel injection pump in the above-mentioned conventional technique, some fixing means had to be separately provided in order to fix the equal pressure valve provided in the delivery valve portion. Since this has been a cause of difficulty in assembling and an increase in cost, in the present invention, the method of fixing the equal pressure valve provided in the delivery valve portion is simply configured.
【０００４】[0004]
本考案の解決しようとする課題は以上の如くであり、次に該課題を解決する為 の手段を説明する。即ち、ディーゼルエンジンにおける燃料噴射ポンプのデリベ リバルブを筒型に構成し、該筒型のデリベルバルブの内部に嵌装した突起状のデ リベリバルブシート６の内部に、戻し油路６ｄと等圧弁付勢バネ５と上部バネ受 け３と等圧弁２を嵌装し、デリベリバルブシート６の上部に吸い戻し用オリフィ ス６ａを穿設したものである。 The problem to be solved by the present invention is as described above. Next, the means for solving the problem will be described. That is, the delivery valve of the fuel injection pump in the diesel engine is configured in a tubular shape, and the return oil passage 6d and the constant pressure valve energization are provided inside the protruding delivery valve seat 6 fitted inside the tubular delivery valve. The spring 5, the upper spring receiver 3 and the equal pressure valve 2 are fitted, and the sucking-back orifice 6a is formed in the upper portion of the delivery valve seat 6.
【０００５】 また、ディーゼルエンジンにおける燃料噴射ポンプのデリベリバルブを筒型に 構成し、該デリベリバルブ１の内部に突起状のデリベリバルブシート６を内装す ると共に、該デリベリバルブシート６の内部に戻し油路６ｄを穿設し、該デリベ リバルブシート６とデリベリバルブ１との間に等圧弁付勢バネ５と上部バネ受け ３と等圧弁２を内装し、該デリベリバルブ１の頂部に吸い戻し用オリフィス１ａ を穿設したものである。In addition, the delivery valve of the fuel injection pump in the diesel engine is formed in a tubular shape, and the delivery valve 1 having a projection is provided inside the delivery valve 1 and returned to the inside of the delivery valve seat 6. An oil passage 6d is bored, and an equal pressure valve biasing spring 5, an upper spring receiver 3 and an equal pressure valve 2 are internally provided between the delivery valve seat 6 and the delivery valve 1, and a suction return orifice is provided at the top of the delivery valve 1. 1a is drilled.
【０００６】 また、ディーゼルエンジンの燃料噴射ポンプのデリベリバルブを筒型に構成し 、該筒型のデリベリバルブ１をデリベリバルブシート６に構成した孔状のバルブ シート６ｂに接当し、該デリベリバルブ１の内部に戻し油路１ｅを穿設し、該デ リベリバルブ１の内部に等圧弁付勢バネ５と上部バネ受け３と等圧弁２を内装し た状態で、等圧弁シート体２３を嵌入し、該等圧弁シート体２３の上方を抜け止 め固定し、該等圧弁シート体２３に吸い戻し用オリフィス２３ａを穿設したもの である。Further, the delivery valve of the fuel injection pump of the diesel engine is formed in a tubular shape, and the delivery valve 1 of the tubular shape is brought into contact with the hole-shaped valve seat 6 b formed in the delivery valve seat 6 to attach the delivery valve 1 of the delivery valve 1. A return oil passage 1e is bored inside, and an equal pressure valve seat body 23 is fitted in a state where the equal pressure valve biasing spring 5, the upper spring receiver 3 and the equal pressure valve 2 are installed inside the delivery valve 1. The equal pressure valve sheet body 23 is fixed so as not to come off and fixed, and the suction valve orifice 23a is bored in the equal pressure valve sheet body 23.
【０００７】[0007]
次に作用を説明する。プランジャ１５の上昇により、高圧燃料がデリベリバル ブホルダ２０の方向に吐出されるのであるが、燃料噴射弁の側が等圧弁２に設定 した圧力よりも高い場合には、デリベリバルブ１は開放されるが、吸い戻し用オ リフィスから、圧油がプランジャバレル１６とプランジャ１５の方に、戻し油路 を通過して戻るように構成しているのである。この構成により、各気筒毎の燃料 噴射終了時に、等圧弁を等圧弁付勢バネ５のセット荷重に応じた圧力で開放し、 燃料噴射弁に発生する残圧を制御することが出来るので、燃焼状態を向上するこ とが出来るのである。 Next, the operation will be described. As the plunger 15 rises, high-pressure fuel is discharged toward the delivery holder 20, but when the pressure on the fuel injection valve side is higher than the pressure set in the equal pressure valve 2, the delivery valve 1 is opened, but the suction valve is opened. The pressure oil is returned from the return orifice toward the plunger barrel 16 and the plunger 15 through the return oil passage. With this configuration, at the end of fuel injection for each cylinder, the equal pressure valve can be opened at a pressure according to the set load of the equal pressure valve urging spring 5, and the residual pressure generated in the fuel injection valve can be controlled. The condition can be improved.
【０００８】[0008]
次に実施例を説明する。図１は燃料噴射ポンプのデリベリバルブ部分に等圧弁 を設けた構造を示す正面断面図、図２は図１のデリベリバルブと等圧弁の部分の 拡大正面断面図、図３はデリベリバルブと等圧弁の構成の他の実施例を示す正面 断面図、図４はデリベリバルブと等圧弁の他の実施例を示す正面断面図、図５は 同じくデリベリバルブと等圧弁の他の実施例を示す正面断面図である。 Next, examples will be described. FIG. 1 is a front sectional view showing a structure in which a delivery valve is provided in a delivery valve portion of a fuel injection pump, FIG. 2 is an enlarged front sectional view of the delivery valve and the delivery valve of FIG. 1, and FIG. 3 is a configuration of the delivery valve and the delivery valve. FIG. 4 is a front sectional view showing another embodiment of the delivery valve and the constant pressure valve, and FIG. 5 is a front sectional view showing another embodiment of the delivery valve and the constant pressure valve.
【０００９】 図１において、燃料噴射ポンプの全体的な構成を説明する。ポンプ軸１１が回 転することにより、該ポンプ軸１１に突設されたカム１０が回転する。該カム１ ０の回転により、カムローラ１２が上下し、該カムローラ１２が枢支された、カ ムフォロワー１３が上下する。該カムフォロワー１３に調量プランジャ１４が係 合されており、該調量プランジャ１４にプランジャ１５が係合されている。該調 量プランジャ１４は、ガバナーラック１８と、ガバナーピニオン１９を介して回 動され、該回動によりプランジャ１５を回動する。該プランジャ１５はプランジ ャバレル１６の内部で上下摺動し、噴射開始リードと噴射終了リードとドレンリ ードの位置が、回動により位置変更され、プランジャバレルに穿設された噴射開 始ポートと、噴射終了ポート、ドレンポートとの位置関係が変化することにより 、吐出量が調整される。The overall structure of the fuel injection pump will be described with reference to FIG. When the pump shaft 11 rotates, the cam 10 protruding from the pump shaft 11 rotates. Due to the rotation of the cam 10, the cam roller 12 moves up and down, and the cam follower 13, which is pivotally supported by the cam roller 12, moves up and down. A metering plunger 14 is engaged with the cam follower 13, and a plunger 15 is engaged with the metering plunger 14. The metering plunger 14 is rotated via a governor rack 18 and a governor pinion 19, and the plunger 15 is rotated by the rotation. The plunger 15 slides up and down inside the plunger barrel 16, and the positions of the injection start lead, the injection end lead, and the drain lead are changed by the rotation, and the injection start port formed in the plunger barrel, The discharge amount is adjusted by changing the positional relationship between the injection end port and the drain port.
【００１０】 該噴射開始ポートと噴射終了ポートとドレンポートから噴射されたスピルは戻 し油ポート１７から戻る。そして該プランジャバレル１６とプランジャ１５によ り吐出される燃料圧油がデリベリバルブホルダ２０に設けられたデリベリバルブ １を介して、高圧燃料パイプを介して、燃料噴射弁に供給される。本考案はデリ ベリバルブホルダ２０の内部に構成されるデリベリバルブの部分に等圧弁を重複 して構成した場合の、支持・組立構成を簡易化するものである。The spill injected from the injection start port, the injection end port, and the drain port returns from the return oil port 17. Then, the fuel pressure oil discharged by the plunger barrel 16 and the plunger 15 is supplied to the fuel injection valve through the delivery valve 1 provided in the delivery valve holder 20 and the high pressure fuel pipe. The present invention simplifies the supporting and assembling structure in the case where an equal pressure valve is overlapped with the delivery valve portion formed inside the delivery valve holder 20.
【００１１】 図２の実施例において、デリベリバルブと等圧弁の構成を説明する。該構成に おいては、プランジャバレル１６に穿設した螺装孔に対して、デリベリバルブホ ルダ２０を螺装するのであるが、該デリベリバルブホルダ２０よりも先に、デリ ベリバルブシート６を嵌装している。該デリベリバルブシート６はプランジャバ レル１６の孔の中に嵌入するだけで、螺装していない。該デリベリバルブシート ６の内部に、戻し油路６ｄを穿設し、該戻し油路６ｄの部分にスペーサー２１と バネ受け２２を介して、等圧弁付勢バネ５を挿入し、該等圧弁付勢バネ５の上端 に上部バネ受け３を介して、ボールにより構成した等圧弁２を押圧している。The configuration of the delivery valve and the equal pressure valve in the embodiment of FIG. 2 will be described. In this configuration, the delivery valve holder 20 is screwed into the screw hole formed in the plunger barrel 16. However, the delivery valve seat 6 is fitted before the delivery valve holder 20. I am wearing The delivery valve seat 6 is fitted into the hole of the plunger barrel 16 only, and is not screwed. A return oil passage 6d is bored inside the delivery valve seat 6, and a constant pressure valve urging spring 5 is inserted into the return oil passage 6d through a spacer 21 and a spring receiver 22. The equal pressure valve 2 formed of a ball is pressed against the upper end of the biasing spring 5 via the upper spring receiver 3.
【００１２】 該等圧弁２はデリベリバルブシート６の上端に開口された等圧弁シートの部分 に押圧されており、該デリベリバルブシート６の等圧弁シートの部分に吸い戻し 用オリフィス６ａが開口されている。また該デリベリバルブシート６の外周の裾 の部分に筒状に構成されたデリベリバルブ１のバルブ部１ｂが接当するバルブシ ート６ｂが構成されている。また該バルブシート６ｂの部分に近くに、デリベリ バルブ孔６ｃが開口されている。The equal pressure valve 2 is pressed against a portion of the equal pressure valve seat opened at the upper end of the delivery valve seat 6, and an orifice 6a for sucking back is opened in the portion of the equal pressure valve seat of the delivery valve seat 6. Has been done. Further, a valve sheet 6b with which the valve portion 1b of the cylindrical delivery valve 1 abuts is formed at the hem portion of the outer periphery of the delivery valve seat 6. Further, a delivery valve hole 6c is opened near the valve seat 6b.
【００１３】 上記構成において、デリベリバルブ１のバルブ部１ｂがバルブシート６ｂに密 着した状態で、デリベリバルブ１が閉鎖されており、プランジャ１５が上昇して 、高圧燃料油を吐出すると、該デリベリバルブ１がデリベリバルブ付勢バネ４に 抗して上昇して、バルブ部１ｂとバルブシート６ｂの部分を開口し、高圧燃料油 がデリベリバルブ孔６ｃからバルブ部１ｂとバルブシート６ｂの間を経て、上部 バネ受け７の孔を通過して、高圧燃料通路２０ａから燃料噴射弁へパイプを経て 供給される。図２の構成においては、デリベリバルブ付勢バネ４の上部バネ受け ７が、下方に突設されており、該上部バネ受け７の下端側部に高圧燃料の通過孔 ７ａ・７ｂが穿設されている。In the above configuration, the delivery valve 1 is closed in a state where the valve portion 1b of the delivery valve 1 is tightly attached to the valve seat 6b, and the plunger 15 moves up to discharge the high pressure fuel oil. Ascends against the delivery valve biasing spring 4 to open the valve portion 1b and the valve seat 6b, and high-pressure fuel oil passes from the delivery valve hole 6c between the valve portion 1b and the valve seat 6b, and then the upper spring support 7 Through the hole, and is supplied from the high-pressure fuel passage 20a to the fuel injection valve through the pipe. In the configuration of FIG. 2, the upper spring bearing 7 of the delivery valve urging spring 4 is provided so as to project downward, and high pressure fuel passage holes 7a and 7b are provided at the lower end side portion of the upper spring bearing 7. There is.
【００１４】 次に図３の実施例において説明する。該構成においても、プランジャバレル１ ６の螺装孔の内部に、デリベリバルブシート６が嵌入されているが、該デリベリ バルブシート６と、このデリベリバルブシート６に嵌入した筒状のデリベリバル ブ１との間に、デリベリバルブ付勢バネ４と上部バネ受け３と等圧弁２を嵌装し ている。そして該デリベリバルブ１に等圧弁２のバルブシートが構成されており 、該デリベリバルブ１の頂上部分に吸い戻し用オリフィス１ａが穿設されている 。デリベリバルブ１の裾部分に構成されたバルブ部１ｂと、デリベリバルブシー ト６の上面に構成されたバルブシート６ｂの構成は、図１・図２の実施例の場合 と同様である。Next, a description will be given with reference to the embodiment shown in FIG. In this configuration as well, the delivery valve seat 6 is fitted inside the threaded hole of the plunger barrel 16, but the delivery valve seat 6 and the tubular delivery valve fitted in the delivery valve seat 6 are fitted. A delivery valve urging spring 4, an upper spring receiver 3 and a constant pressure valve 2 are fitted between the pressure regulating valve 1 and the delivery valve 1. A valve seat of the equal pressure valve 2 is formed in the delivery valve 1, and a suction return orifice 1a is bored in the top portion of the delivery valve 1. The configurations of the valve portion 1b formed on the bottom of the delivery valve 1 and the valve seat 6b formed on the upper surface of the delivery valve sheet 6 are the same as those in the embodiment shown in FIGS.
【００１５】 次に図４の構成について説明する。該実施例の場合には、プランジャバレル１ ６の螺装孔内に嵌装したデリベリバルブシート６に更に孔が穿設されており、こ のデリベリバルブシート６の孔内にバルブシート６ｂが構成されている。そして この孔内に筒状に構成されたデリベリバルブ１が挿入されており、該デリベリバ ルブ１のバルブ部１ｂの部分のバルブシート６ｂに接当している。そしてデリベ リバルブ１の内部に等圧弁付勢バネ５と上部バネ受け３と等圧弁２が嵌装されて おり、該デリベリバルブ１の頂部の開口に等圧弁シート体２３が嵌装され、嵌装 後に、デリベリバルブ１の筒カシメ部１ｄをかしめることにより、この等圧弁シ ート体２３の抜け止め構成としている。該等圧弁シート体２３に吸い戻し用オリ フィス２３ａが穿設されている。また、該デリベリバルブ１の下部がデリベリバ ルブシート６の孔内に重複するダッシュポット部を長さＬにわたり構成している 。またデリベリバルブ１の下部に戻し油路１ｅが穿設されている。Next, the configuration of FIG. 4 will be described. In the case of this embodiment, a hole is further formed in the delivery valve seat 6 fitted in the screw hole of the plunger barrel 16, and the valve seat 6b is provided in the hole of the delivery valve seat 6. Is configured. A delivery valve 1 having a cylindrical shape is inserted into this hole, and is in contact with the valve seat 6b of the valve portion 1b of the delivery valve 1. An equal pressure valve biasing spring 5, an upper spring receiver 3 and an equal pressure valve 2 are fitted inside the delivery valve 1, and an equal pressure valve seat body 23 is fitted into the top opening of the delivery valve 1, and after fitting. By crimping the cylindrical caulking portion 1d of the delivery valve 1, the constant pressure valve sheet body 23 is prevented from coming off. A suction-back orifice 23a is formed in the equal pressure valve sheet body 23. The lower portion of the delivery valve 1 constitutes a dashpot portion that overlaps the hole of the delivery valve seat 6 over a length L. Further, a return oil passage 1e is formed in the lower portion of the delivery valve 1.
【００１６】 次に図５の実施例において説明する。該実施例は基本的には、図４の実施例と 略同じであるが、デリベリバルブシート６のバルブシート６ｂが、孔の中ではな くて、孔の入口部分に構成されている。同様に、該バルブシート６ｂに接当する デリベリバルブ１のバルブ部１ｂや、該孔の入口部分に構成されている。しかし 、デリベリバルブ１の内部に等圧弁付勢バネ５と上部バネ受け３と等圧弁２４を 嵌装し、更に該等圧弁２４の抜け止めを筒カシメ部１ｄにより構成し、等圧弁２ ４の内部に吸い戻し用オリフィス２４ａを穿設している。該等圧弁２４は燃料噴 射弁の残圧が上方から作用して、下方へ押されて、ストロークＢだけ摺動すると 、該吸い戻し用オリフィス２４ａが開口して、残圧油を吸い戻し用オリフィス２ ４ａから戻し油路１ｅに戻すのである。Next, a description will be given of the embodiment shown in FIG. This embodiment is basically the same as the embodiment shown in FIG. 4, but the valve seat 6b of the delivery valve seat 6 is formed not at the inside of the hole but at the entrance portion of the hole. Similarly, the valve portion 1b of the delivery valve 1 that contacts the valve seat 6b and the inlet portion of the hole are formed. However, the equalizing valve urging spring 5, the upper spring receiver 3 and the equalizing valve 24 are fitted inside the delivery valve 1, and further, the retaining of the equalizing valve 24 is constituted by the tubular caulking portion 1d. An orifice 24a for sucking back is provided in the. When the residual pressure of the fuel injection valve acts from above and the equal pressure valve 24 is pushed downward and slides by stroke B, the suction return orifice 24a opens to suck back residual pressure oil. It is returned from the orifice 24a to the return oil passage 1e.
【００１７】[0017]
本考案は以上の如く構成したので、次のような効果を奏するのである。即ち、 請求項１の如く構成したので、デリベリバルブの静止部分に等圧弁を構成したの で、デリベリバルブの開閉に伴う慣性力の影響を受けることがなく、噴射終了時 の残圧制御を目的とする等圧弁の効果を最大限度に発揮することが出来るのであ る。 Since the present invention is configured as described above, it has the following effects. That is, since it is configured as in claim 1, since the equalizing valve is formed in the stationary portion of the delivery valve, the residual pressure control at the end of injection is not affected by the inertial force due to the opening and closing of the delivery valve. It is possible to maximize the effect of the equal pressure valve.
【００１８】 請求項２の如く構成したので、等圧弁部分を固定する部品を設けることなく、 等圧弁部分を支持組立することが出来るので、該等圧弁付きデリベリバルブを低 コストで構成し、組立も容易にすることが出来たのである。According to the second aspect, since the equal pressure valve portion can be supported and assembled without providing a component for fixing the equal pressure valve portion, the delivery valve with the equal pressure valve can be constructed at low cost and can be assembled. It was easy to do.
【００１９】 請求項３の如く構成したので、デリベリバルブ１の開放と共に等圧弁２も高圧 側に移動する構成となっているので、増圧効果を有することとなり、燃料噴射ポ ンプの高圧化を図ることが出来るのである。Since the delivery valve 1 is opened, the equal pressure valve 2 is also moved to the high-pressure side when the delivery valve 1 is opened, so that the pressure-increasing effect is obtained and the pressure of the fuel injection pump is increased. You can do it.
【図１】燃料噴射ポンプのデリベリバルブ部分に等圧弁
を設けた構造を示す正面断面図。FIG. 1 is a front sectional view showing a structure in which a delivery valve portion of a fuel injection pump is provided with an equal pressure valve.
【図２】図１のデリベリバルブと等圧弁の部分の拡大正
面断面図。FIG. 2 is an enlarged front cross-sectional view of the delivery valve and the constant pressure valve of FIG.
【図３】デリベリバルブと等圧弁の構成の他の実施例を
示す正面断面図。FIG. 3 is a front sectional view showing another embodiment of the configuration of the delivery valve and the equal pressure valve.
【図４】デリベリバルブと等圧弁の他の実施例を示す正
面断面図。FIG. 4 is a front sectional view showing another embodiment of the delivery valve and the constant pressure valve.
【図５】同じくデリベリバルブと等圧弁の他の実施例を
示す正面断面図。FIG. 5 is a front sectional view showing another embodiment of the delivery valve and the equal pressure valve.
１ デリベリバルブ ２ 等圧弁 ３ 上部バネ受け ４ デリベリバルブ付勢バネ ５ 等圧弁付勢バネ ６ デリベリバルブシート ７ 上部バネ受け 1 Delivery valve 2 Equal pressure valve 3 Upper spring bearing 4 Delivery valve biasing spring 5 Equal pressure valve biasing spring 6 Delivery valve seat 7 Upper spring bearing
Claims (3)
ンプのデリベリバルブを筒型に構成し、該筒型のデリベ
ルバルブの内部に嵌装した突起状のデリベリバルブシー
ト６の内部に、戻し油路６ｄと等圧弁付勢バネ５と上部
バネ受け３と等圧弁２を嵌装し、デリベリバルブシート
６の上部に吸い戻し用オリフィス６ａを穿設したことを
特徴とする燃料噴射ポンプの等圧弁構造。1. A delivery valve of a fuel injection pump in a diesel engine is formed in a tubular shape, and a return oil passage 6d and an equal pressure valve are provided inside a projecting delivery valve seat 6 fitted inside the tubular delivery valve. A constant pressure valve structure for a fuel injection pump, characterized in that a biasing spring 5, an upper spring receiver 3 and a constant pressure valve 2 are fitted and a suction return orifice 6a is formed in an upper portion of a delivery valve seat 6.
ンプのデリベリバルブを筒型に構成し、該デリベリバル
ブ１の内部に突起状のデリベリバルブシート６を内装す
ると共に、該デリベリバルブシート６の内部に戻し油路
６ｄを穿設し、該デリベリバルブシート６とデリベリバ
ルブ１との間に等圧弁付勢バネ５と上部バネ受け３と等
圧弁２を内装し、該デリベリバルブ１の頂部に吸い戻し
用オリフィス１ａを穿設したことを特徴とする燃料噴射
ポンプの等圧弁構造。2. A delivery valve of a fuel injection pump in a diesel engine is formed into a tubular shape, a delivery valve seat 6 having a projection is provided inside the delivery valve 1, and a return oil is returned to the inside of the delivery valve seat 6. A passage 6d is bored, and a constant pressure valve urging spring 5, an upper spring receiver 3 and a constant pressure valve 2 are provided between the delivery valve seat 6 and the delivery valve 1, and a suction return orifice 1a is provided on the top of the delivery valve 1. A constant-pressure valve structure for a fuel injection pump, characterized in that
デリベリバルブを筒型に構成し、該筒型のデリベリバル
ブ１をデリベリバルブシート６に構成した孔状のバルブ
シート６ｂに接当し、該デリベリバルブ１の内部に戻し
油路１ｅを穿設し、該デリベリバルブ１の内部に等圧弁
付勢バネ５と上部バネ受け３と等圧弁２を内装した状態
で、等圧弁シート体２３を嵌入し、該等圧弁シート体２
３の上方を抜け止め固定し、該等圧弁シート体２３に吸
い戻し用オリフィス２３ａを穿設したことを特徴とする
燃料噴射ポンプの等圧弁構造。3. A delivery valve of a fuel injection pump of a diesel engine is formed in a tubular shape, and the delivery valve 1 of the tubular shape is brought into contact with a hole-shaped valve seat 6b formed in a delivery valve seat 6, and the delivery valve 1 of the delivery valve 1 is connected. A return oil passage 1e is bored inside, and an equal pressure valve seat body 23 is fitted in the delivery valve 1 with the equal pressure valve biasing spring 5, the upper spring receiver 3 and the equal pressure valve 2 installed therein, Sheet body 2
3. A constant pressure valve structure for a fuel injection pump, characterized in that the upper part of 3 is fixed so as not to fall off, and a suction return orifice 23a is formed in the constant pressure valve seat body 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993027673U JP2585162Y2 (en) | 1993-05-26 | 1993-05-26 | Fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993027673U JP2585162Y2 (en) | 1993-05-26 | 1993-05-26 | Fuel injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0687665U true JPH0687665U (en) | 1994-12-22 |
| JP2585162Y2 JP2585162Y2 (en) | 1998-11-11 |
Family
ID=12227477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993027673U Expired - Lifetime JP2585162Y2 (en) | 1993-05-26 | 1993-05-26 | Fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2585162Y2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200446542Y1 (en) * | 2007-11-21 | 2009-11-06 | 한국콘트롤공업 주식회사 | Auto exhaust valve having cheek valve |
| JP2013167259A (en) * | 2013-06-06 | 2013-08-29 | Hitachi Automotive Systems Ltd | High pressure fuel supply pump |
| JP2014148980A (en) * | 2014-05-28 | 2014-08-21 | Hitachi Automotive Systems Ltd | High-pressure fuel supply pump |
| US9828958B2 (en) | 2011-03-08 | 2017-11-28 | Hitachi Automotive Systems, Ltd. | High-pressure fuel supply pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0486370A (en) * | 1990-07-26 | 1992-03-18 | Nippondenso Co Ltd | Pressure regulating valve for fuel injection pump |
-
1993
- 1993-05-26 JP JP1993027673U patent/JP2585162Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0486370A (en) * | 1990-07-26 | 1992-03-18 | Nippondenso Co Ltd | Pressure regulating valve for fuel injection pump |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200446542Y1 (en) * | 2007-11-21 | 2009-11-06 | 한국콘트롤공업 주식회사 | Auto exhaust valve having cheek valve |
| US9828958B2 (en) | 2011-03-08 | 2017-11-28 | Hitachi Automotive Systems, Ltd. | High-pressure fuel supply pump |
| US10788004B2 (en) | 2011-03-08 | 2020-09-29 | Hitachi Automotive Systems, Ltd. | High-pressure fuel supply pump |
| JP2013167259A (en) * | 2013-06-06 | 2013-08-29 | Hitachi Automotive Systems Ltd | High pressure fuel supply pump |
| JP2014148980A (en) * | 2014-05-28 | 2014-08-21 | Hitachi Automotive Systems Ltd | High-pressure fuel supply pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2585162Y2 (en) | 1998-11-11 |
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