JP2003065182A - Accumulator fuel injection device and manufacturing method of same - Google Patents
Accumulator fuel injection device and manufacturing method of sameInfo
- Publication number
- JP2003065182A JP2003065182A JP2001252849A JP2001252849A JP2003065182A JP 2003065182 A JP2003065182 A JP 2003065182A JP 2001252849 A JP2001252849 A JP 2001252849A JP 2001252849 A JP2001252849 A JP 2001252849A JP 2003065182 A JP2003065182 A JP 2003065182A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- screw
- container
- fuel injection
- screw 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.)
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Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高圧の燃料が蓄圧
状態で蓄えられる蓄圧容器を備える蓄圧式燃料噴射装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-accumulation type fuel injection device provided with a pressure accumulation container for storing high-pressure fuel in a pressure accumulation state.
【０００２】[0002]
【従来の技術】燃料噴射ポンプにより加圧した燃料を蓄
圧容器（いわゆるコモンレール）内に蓄え、蓄えられた
高圧の燃料を複数のインジェクタに供給し燃焼室へ燃料
を噴射する内燃機関（以下、内燃機関を「エンジン」と
いう。）用のコモンレール式燃料噴射装置が公知であ
る。コモンレール式の燃料噴射装置では、蓄圧容器に蓄
えられた高圧の燃料は複数の気筒に対応して設けられて
いる複数のインジェクタへ供給される。コモンレール式
の燃料噴射装置の場合、蓄圧容器の内部に形成されてい
る蓄圧室と複数のインジェクタとがそれぞれ燃料配管に
より接続されている。2. Description of the Related Art An internal combustion engine that stores fuel pressurized by a fuel injection pump in a pressure accumulator (so-called common rail), supplies the stored high-pressure fuel to a plurality of injectors, and injects the fuel into a combustion chamber (hereinafter referred to as internal combustion engine). A common rail fuel injection system for an engine is known. In the common rail fuel injection device, the high-pressure fuel stored in the pressure accumulator is supplied to a plurality of injectors provided corresponding to a plurality of cylinders. In the case of a common rail type fuel injection device, a pressure accumulating chamber formed inside a pressure accumulating container and a plurality of injectors are connected by a fuel pipe.
【０００３】例えば、特開平９−１１２３７８号公報に
開示されている蓄圧式燃料噴射装置の場合、図７に示す
ように蓄圧室１１１が形成されている蓄圧容器１１０に
は、蓄圧室１１１へ燃料配管１２１を接続する締結部品
１２０が組み付けられている。この場合、締結部品１２
０は蓄圧容器１１０に直接取り付けられるのではなく、
蓄圧容器１１０に取り付けられたねじ部材１３０に取り
付けられている。ねじ部材１３０には蓄圧容器１１０側
の端部と反蓄圧容器側の端部とを連通するねじ孔１３１
が形成されており、ねじ孔１３１に締結部品１２０がね
じ結合される。For example, in the case of the pressure-accumulation fuel injection device disclosed in Japanese Patent Laid-Open No. 9-112378, the pressure-accumulation chamber 110 in which the pressure-accumulation chamber 111 is formed as shown in FIG. The fastening component 120 that connects the pipe 121 is assembled. In this case, the fastening component 12
0 is not directly attached to the accumulator container 110,
It is attached to a screw member 130 attached to the pressure accumulating container 110. The screw member 130 has a screw hole 131 for communicating an end portion on the pressure accumulator container 110 side and an end portion on the anti-accumulator container side.
Is formed, and the fastening component 120 is screwed into the screw hole 131.
【０００４】[0004]
【発明が解決しようとする課題】特開平９−１１２３７
８号公報に開示されている蓄圧式燃料噴射装置の場合、
ねじ部材１３０に締結部品１２０をねじ結合させること
により、蓄圧容器１１０に形成されているシート部１１
２と締結部品１２０の当接部１２１とが液密に当接した
状態で固定される。すなわち、締結部品１２０はねじ部
材１３０とねじ結合されることにより、端部が蓄圧容器
１１０と当接し、締結部品１２０と蓄圧容器１１０とが
液密に結合される。これと同時に、蓄圧容器１１０とね
じ部材１１０とは、蓄圧容器１１０と当接する締結部品
１２０がねじ締めされることで得られる締結部品１２０
の軸力により固定される。[Patent Document 1] Japanese Patent Application Laid-Open No. 9-11237
In the case of the pressure accumulation type fuel injection device disclosed in Japanese Patent No.
The seat portion 11 formed in the pressure accumulating container 110 is obtained by screwing the fastening member 120 to the screw member 130.
2 and the contact portion 121 of the fastening component 120 are fixed in a liquid-tight contact state. That is, when the fastening component 120 is screwed to the screw member 130, the end portion of the fastening component 120 contacts the pressure accumulating container 110, and the fastening component 120 and the pressure accumulating container 110 are fluid-tightly coupled. At the same time, the pressure accumulating container 110 and the screw member 110 are obtained by tightening the fastening component 120 abutting the pressure accumulating container 110 with a screw.
It is fixed by the axial force of.
【０００５】しかしながら、上記のような構成の場合、
蓄圧容器１１０と締結部品１２０の間で液密にシールさ
れる面において、蓄圧容器１１０とねじ部材１３０とを
固定する締結部品１２０の軸力をも保持する必要があ
る。そのため、締結部品１２０の周囲に外力が加わった
場合、蓄圧容器１１０と締結部品１２０の間のシール性
が容易に低下し、液密が不良となるという問題がある。
そこで、本発明の目的は、簡単な構造で液密が保持さ
れ、部材間の固定が強固な蓄圧式燃料噴射装置およびそ
の製造方法を提供することにある。However, in the case of the above configuration,
It is necessary to hold the axial force of the fastening component 120 that fixes the pressure accumulating container 110 and the screw member 130 on the surface that is liquid-tightly sealed between the pressure accumulating container 110 and the fastening component 120. Therefore, when an external force is applied to the periphery of the fastening component 120, there is a problem that the sealing property between the pressure accumulating container 110 and the fastening component 120 easily deteriorates, resulting in poor liquid tightness.
Therefore, an object of the present invention is to provide a pressure-accumulation fuel injection device in which liquid tightness is maintained with a simple structure and fixation between members is strong, and a manufacturing method thereof.
【０００６】[0006]
【課題を解決するための手段】本発明の請求項１記載の
蓄圧式燃料噴射装置によると、締結部材はねじ部材の第
一脚部に形成されているねじ孔にねじ結合され締め付け
られる。そのため、蓄圧容器のシート部と締結部材の当
接部とは、ねじ結合による締結力により液密に結合され
る。また、ねじ部材は固定部材により蓄圧容器に固定さ
れている。そのため、蓄圧容器とねじ部材とは固定部材
により固定され、締結部材のねじ結合による締結力は当
接部とシート部との間の液密の保持に利用される。すな
わち、ねじ部材と締結部材とのねじ結合によりシート部
と当接部との間の液密が保持され、固定部材により蓄圧
容器とねじ部材との間の固定力が得られる。したがっ
て、簡単な構造で締結部材の周囲に外力が作用した場合
でもシート部と当接部との間の液密を保持することがで
き、部材間の固定を強固にすることができる。According to the pressure-accumulation fuel injection device of the first aspect of the present invention, the fastening member is screwed into the screw hole formed in the first leg portion of the screw member and tightened. Therefore, the seat portion of the pressure accumulating container and the contact portion of the fastening member are liquid-tightly coupled by the fastening force by screw coupling. Also, the screw member is fixed to the pressure accumulator by a fixing member. Therefore, the pressure accumulating container and the screw member are fixed by the fixing member, and the fastening force due to the screw connection of the fastening member is used for maintaining liquid tightness between the contact portion and the seat portion. That is, the liquid tightness between the seat portion and the contact portion is maintained by the screw connection of the screw member and the fastening member, and the fixing force between the pressure accumulating container and the screw member is obtained by the fixing member. Therefore, even if an external force is applied to the periphery of the fastening member with a simple structure, liquid tightness between the seat portion and the contact portion can be maintained, and the fixing between the members can be strengthened.
【０００７】本発明の請求項２記載の蓄圧式燃料噴射装
置によると、固定部材は蓄圧容器を挟み込むねじ部材の
第一脚部および第二脚部に形成されている穴部に設置さ
れている。そのため、固定部材は蓄圧容器を挟み込んで
両側から蓄圧容器とねじ部材とを保持する。したがっ
て、蓄圧容器とねじ部材とを強固に固定することができ
る。According to the pressure-accumulation type fuel injection device of the second aspect of the present invention, the fixing member is installed in the holes formed in the first leg portion and the second leg portion of the screw member for sandwiching the pressure accumulating container. . Therefore, the fixing member sandwiches the pressure accumulating container and holds the pressure accumulating container and the screw member from both sides. Therefore, the pressure accumulating container and the screw member can be firmly fixed.
【０００８】本発明の請求項３記載の蓄圧式燃料噴射装
置によると、固定部材には雄ねじ部が形成され、ねじ部
材の穴部に形成されている雌ねじ部とねじ結合される。
そのため、固定部材とねじ部材とのねじ結合による締結
力によって、蓄圧容器とねじ部材とを固定することがで
きる。According to the pressure-accumulation type fuel injection device of the third aspect of the present invention, the fixing member is formed with the male screw portion and is screwed to the female screw portion formed in the hole of the screw member.
Therefore, the pressure accumulating container and the screw member can be fixed by the fastening force by the screw connection between the fixing member and the screw member.
【０００９】本発明の請求項４記載の蓄圧式燃料噴射装
置によると、固定部材は球形状に形成され穴部に圧入さ
れている。球形状の固定部材と蓄圧容器とが当接するこ
とによりねじ部材は蓄圧容器に固定され、蓄圧容器とね
じ部材とを強固に固定することができる。According to the pressure-accumulation type fuel injection device of the fourth aspect of the present invention, the fixing member is formed in a spherical shape and is press-fitted into the hole. The screw member is fixed to the pressure accumulating container by the contact between the spherical fixing member and the pressure accumulating container, and the pressure accumulating container and the screw member can be firmly fixed.
【００１０】本発明の請求項５記載の蓄圧式燃料噴射装
置によると、固定部材は第一脚部に２カ所、ならびに第
二脚部に１カ所設置されている。そのため、蓄圧容器と
ねじ部材とは固定部材により三点で固定されている。し
たがって、ねじ部材と蓄圧容器とを安定的かつ強固に固
定することができる。According to the pressure-accumulation type fuel injection device of the fifth aspect of the present invention, the fixing member is provided at two places on the first leg and one place on the second leg. Therefore, the pressure accumulating container and the screw member are fixed at three points by a fixing member. Therefore, the screw member and the pressure accumulator can be fixed stably and firmly.
【００１１】本発明の請求項６記載の蓄圧式燃料噴射装
置によると、固定部材の蓄圧容器側の端部は蓄圧容器に
当接しており、蓄圧容器を変形させている。これによ
り、固定部材は蓄圧容器にくい込んだ状態となり、第一
脚部および第二脚部に設置される固定部材による蓄圧容
器の軸に垂直な方向の移動だけでなく、当該軸に沿った
平面方向の移動が防止される。したがって、蓄圧容器と
ねじ部材とを強固に固定することができる。According to the pressure-accumulation type fuel injection device of the sixth aspect of the present invention, the end of the fixing member on the pressure-accumulation container side is in contact with the pressure-accumulation container to deform the pressure-accumulation container. As a result, the fixing member is in a state in which it is difficult to fit in the pressure accumulating container, and not only the movement of the fixing member installed on the first leg and the second leg in the direction perpendicular to the axis of the accumulating container but also on the plane along the axis. Directional movement is prevented. Therefore, the pressure accumulating container and the screw member can be firmly fixed.
【００１２】本発明の請求項７記載の蓄圧式燃料噴射装
置の製造方法によると、請求項１から７のいずれか一項
記載の蓄圧式燃料噴射装置において、まず蓄圧容器にね
じ部材が仮固定される。例えば、蓄圧容器にねじ部材を
嵌合させることにより蓄圧容器とねじ部材とは仮固定さ
れる。蓄圧容器にねじ部材を仮固定した状態でねじ部材
のねじ孔に締結部材を取り付け、所定の締め付け力で締
結部材を締め付ける。これにより、当接部とシール部と
の間の液密が保持される。ねじ部材に締結部材が締め付
けられると、ねじ部材に固定部材を取り付けねじ部材を
蓄圧容器に本固定する。これにより、締結部材と蓄圧容
器との間の締結力を所定の力に保持し液密を保持した状
態でねじ部材と蓄圧容器とが強固に固定される。According to the method of manufacturing a pressure-accumulation fuel injection device according to claim 7 of the present invention, in the pressure-accumulation fuel injection device according to any one of claims 1 to 7, first, the screw member is temporarily fixed to the pressure accumulator container. To be done. For example, by fitting a screw member to the pressure accumulating container, the pressure accumulating container and the screw member are temporarily fixed. The fastening member is attached to the screw hole of the screw member while the screw member is temporarily fixed to the pressure accumulating container, and the fastening member is tightened with a predetermined tightening force. Thereby, the liquid tightness between the contact portion and the seal portion is maintained. When the fastening member is fastened to the screw member, the fixing member is attached to the screw member to permanently fix the screw member to the pressure accumulator. As a result, the screw member and the pressure accumulating container are firmly fixed in a state where the fastening force between the fastening member and the pressure accumulating container is maintained at a predetermined force and liquid tightness is maintained.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を示す
複数の実施例を図面に基づいて説明する。
（第１実施例）本発明の第１実施例による蓄圧式燃料噴
射装置は、図２に示すように燃料噴射ポンプおよびイン
ジェクタを備える燃料噴射システム１を構成している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plurality of embodiments showing the embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) A pressure-accumulation fuel injection system according to a first embodiment of the present invention constitutes a fuel injection system 1 including a fuel injection pump and an injector as shown in FIG.
【００１４】図２に示すように、ディーゼルエンジン
（以下、単に「エンジン」という。）１０には複数の気
筒に対応してそれぞれインジェクタ１１が配設されてい
る。インジェクタ１１から各気筒への燃料の噴射タイミ
ングおよび噴射量は、インジェクタ１１の電磁弁１１ａ
のオンオフにより制御される。各気筒のインジェクタ１
１は各気筒共通の蓄圧容器２０の蓄圧室２１に接続され
ている。インジェクタ１１の電磁弁１１ａが開弁する
と、蓄圧室２１に蓄えられている高圧の燃料がインジェ
クタ１１へ供給され、インジェクタ１１からエンジン１
０の各気筒へ噴射される。蓄圧室２１では所定の噴射圧
力の燃料を蓄圧状態で保持する必要がある。そのため、
蓄圧室２１には高圧の燃料噴射ポンプ１２から加圧され
た燃料が供給される。燃料噴射ポンプ１２は低圧ポンプ
１３から供給された燃料を吸入し所定の圧力まで加圧す
る。加圧された燃料は吐出弁１２１および燃料配管１４
を経由して蓄圧容器２０の蓄圧室２１へ供給される。As shown in FIG. 2, a diesel engine (hereinafter simply referred to as "engine") 10 is provided with injectors 11 corresponding to a plurality of cylinders. The injection timing and the injection amount of fuel from the injector 11 to each cylinder are determined by the solenoid valve 11a of the injector 11.
It is controlled by turning on and off. Injector 1 for each cylinder
1 is connected to a pressure accumulating chamber 21 of a pressure accumulating container 20 common to each cylinder. When the solenoid valve 11a of the injector 11 is opened, the high-pressure fuel stored in the pressure accumulating chamber 21 is supplied to the injector 11, and the injector 11 causes the engine 1 to operate.
It is injected into each cylinder of 0. In the pressure accumulating chamber 21, it is necessary to hold fuel having a predetermined injection pressure in a pressure accumulating state. for that reason,
The high pressure fuel injection pump 12 supplies pressurized fuel to the pressure accumulating chamber 21. The fuel injection pump 12 sucks the fuel supplied from the low-pressure pump 13 and pressurizes it to a predetermined pressure. The pressurized fuel is discharged from the discharge valve 121 and the fuel pipe 14.
Is supplied to the pressure accumulating chamber 21 of the pressure accumulating container 20.
【００１５】燃料噴射システム１は、ＥＣＵ２により制
御されている。ＥＣＵ２には例えば回転数センサ３およ
び負荷センサ４などが接続され、ＥＣＵ２は入力された
回転数および負荷の情報からエンジン１０の運転状態に
応じた最適の燃料の噴射タイミングおよび噴射量（噴射
期間）を算出する。算出された噴射タイミングおよび噴
射量に基づいてＥＣＵ２はインジェクタ１１の電磁弁１
１ａのオンオフを制御するための制御信号を出力する。
同時に、ＥＣＵ２は回転数および負荷などに応じて燃料
の圧力が最適値となるように燃料噴射ポンプ１２を制御
する。蓄圧室２１には蓄圧室２１内部の燃料の圧力を検
出する圧力センサ２２が設置され、ＥＣＵ２は圧力セン
サ２２からの出力信号に基づいて蓄圧室２１内部の圧力
が最適値となるように燃料噴射ポンプ１２の吐出量を制
御する。The fuel injection system 1 is controlled by the ECU 2. The ECU 2 is connected to, for example, a rotation speed sensor 3 and a load sensor 4, and the ECU 2 determines the optimum fuel injection timing and injection amount (injection period) according to the operating state of the engine 10 based on the input rotation speed and load information. To calculate. The ECU 2 controls the solenoid valve 1 of the injector 11 based on the calculated injection timing and injection amount.
A control signal for controlling ON / OFF of 1a is output.
At the same time, the ECU 2 controls the fuel injection pump 12 so that the pressure of the fuel becomes an optimum value according to the rotation speed and the load. A pressure sensor 22 that detects the pressure of fuel inside the pressure accumulating chamber 21 is installed in the pressure accumulating chamber 21, and the ECU 2 injects fuel so that the pressure inside the pressure accumulating chamber 21 becomes an optimum value based on the output signal from the pressure sensor 22. The discharge amount of the pump 12 is controlled.
【００１６】本実施例の蓄圧式燃料噴射装置３０は、図
１に示すように蓄圧容器２０、ねじ部材４０、締結部材
としてのコネクタ５０および燃料パイプ６０、ならびに
固定部材としてのボルト７０を備えている。蓄圧容器２
０は、図１および図２に示すように外形が概略円筒形状
に形成されている。蓄圧容器２０は、内部に軸方向へ延
伸する蓄圧室２１が形成されている。蓄圧容器２０には
複数の通孔２３が形成され、通孔２３は蓄圧室２１と蓄
圧容器２０の外壁２０ａとを連通している。蓄圧容器２
０には、円筒形状の部分と、図１および図３に示すよう
に円筒の一部が切り取られた形状の平坦部２４とが形成
されている。この平坦部２４を挟み込むようにねじ部材
４０が嵌合されている。通孔２３の途中にはシート部２
３ａが形成されており、シート部２３ａは円錐形状に形
成されている。As shown in FIG. 1, the pressure accumulating fuel injection device 30 of this embodiment comprises a pressure accumulating container 20, a screw member 40, a connector 50 and a fuel pipe 60 as a fastening member, and a bolt 70 as a fixing member. There is. Accumulation container 2
As shown in FIGS. 1 and 2, 0 has a substantially cylindrical outer shape. The pressure accumulating container 20 has a pressure accumulating chamber 21 extending in the axial direction formed therein. A plurality of through holes 23 are formed in the pressure accumulating container 20, and the through holes 23 connect the pressure accumulating chamber 21 and the outer wall 20 a of the pressure accumulating container 20. Accumulation container 2
At 0, a cylindrical portion and a flat portion 24 having a shape obtained by cutting out a part of the cylinder as shown in FIGS. 1 and 3 are formed. A screw member 40 is fitted so as to sandwich the flat portion 24. The seat portion 2 is provided in the middle of the through hole 23.
3a is formed, and the seat portion 23a is formed in a conical shape.
【００１７】ねじ部材４０は、図１および図３に示すよ
うに断面が概略Ｕ字形状に形成されており、第一脚部４
１と第二脚部４２とが連結部４３により一体に連結され
た形状である。第一脚部４１にコネクタ５０を固定する
ためのねじ孔４１１が形成されている。第一脚部４１お
よび第二脚部４２の蓄圧容器２０側の端面は蓄圧容器２
０の平坦部２４と当接している。図３に示すように、ね
じ部材４０の第一脚部４１にはねじ孔４１１が形成され
ており、ねじ孔４１１には締結部材のコネクタ５０がね
じ結合される雌ねじ部４１１ａが形成されている。ねじ
部材４０は、蓄圧容器２０の平坦部２４に跨ぐように取
り付けられている。As shown in FIGS. 1 and 3, the screw member 40 has a substantially U-shaped cross section, and the first leg portion 4 is formed.
1 and the second leg portion 42 are integrally connected by a connecting portion 43. A screw hole 411 for fixing the connector 50 is formed in the first leg portion 41. The end surfaces of the first leg portion 41 and the second leg portion 42 on the side of the pressure accumulating container 20 are the pressure accumulating container 2
It is in contact with the flat portion 24 of 0. As shown in FIG. 3, a screw hole 411 is formed in the first leg portion 41 of the screw member 40, and a female screw portion 411 a to which the connector 50 of the fastening member is screwed is formed in the screw hole 411. . The screw member 40 is attached so as to straddle the flat portion 24 of the accumulator 20.
【００１８】締結部材はコネクタ５０および燃料パイプ
６０から構成されている。コネクタ５０はねじ部材４０
の第一脚部４１に取り付けられる。コネクタ５０は、図
３に示すようにねじ部材４０の第一脚部４１に形成され
ている雌ねじ部４１１ａとねじ結合される雄ねじ部５１
を有している。コネクタ５０には燃料パイプ６０と当接
する当接部５２が形成されている。燃料パイプ６０の端
部には円錐形状の当接部６１が形成されており、この当
接部６１は蓄圧容器２０に形成されているシート部２３
ａに着座可能である。燃料パイプ６０は、円筒形状に成
形されており、蓄圧室２１とインジェクタ１１とを接続
し、蓄圧室２１の燃料をインジェクタ１１に供給する。
燃料パイプ６０には肩部６２が形成されており、肩部６
２はコネクタ５０の当接部５２と当接する。The fastening member is composed of a connector 50 and a fuel pipe 60. The connector 50 is a screw member 40.
Is attached to the first leg portion 41 of the. As shown in FIG. 3, the connector 50 includes a male screw portion 51 that is screwed to a female screw portion 411a formed on the first leg portion 41 of the screw member 40.
have. A contact portion 52 that contacts the fuel pipe 60 is formed in the connector 50. A conical contact portion 61 is formed at the end of the fuel pipe 60, and the contact portion 61 is formed in the pressure accumulator 20 in the seat portion 23.
Can be seated on a. The fuel pipe 60 is formed in a cylindrical shape, connects the pressure accumulating chamber 21 and the injector 11, and supplies the fuel in the pressure accumulating chamber 21 to the injector 11.
A shoulder portion 62 is formed on the fuel pipe 60, and the shoulder portion 6 is formed.
2 contacts the contact portion 52 of the connector 50.
【００１９】ねじ部材４０の雌ねじ部４１１ａには燃料
パイプ６０が挿入されたコネクタ５０がねじ結合され
る。すなわち、燃料パイプ６０の当接部６１と蓄圧容器
２０のシート部２３ａとが当接した状態でコネクタ５０
の雄ねじ部５１とねじ部材４０の雌ねじ部４１１ａとを
ねじ結合し締め付けると、ねじ孔４１１にコネクタ５０
が締め付けられ、肩部６２と当接部５２とが当接する。
さらにコネクタ５０を締め付けることにより、シート部
２３ａが当接部６１に着座し、シート部２３ａと当接部
６１との間で液密が確保される。The connector 50 having the fuel pipe 60 inserted therein is screwed to the female screw portion 411a of the screw member 40. That is, the connector 50 with the contact portion 61 of the fuel pipe 60 and the seat portion 23a of the pressure accumulator 20 in contact with each other.
When the male screw portion 51 of the screw and the female screw portion 411a of the screw member 40 are screwed together and tightened, the connector 50 is inserted into the screw hole 411.
Is tightened, and the shoulder portion 62 and the contact portion 52 come into contact with each other.
By further tightening the connector 50, the seat portion 23a is seated on the contact portion 61, and liquid tightness is secured between the seat portion 23a and the contact portion 61.
【００２０】固定部材としてのボルト７０は、蓄圧容器
２０とねじ部材４０とを固定する。ボルト７０には、雄
ねじ部７１ならびに当接部７２が形成されている。当接
部７２はボルト７０の先端部に形成されており、ねじ部
材４０にボルト７０が締め付けられることにより当接部
７２は蓄圧容器２０と当接する。ねじ部材４０にはボル
ト７０が取り付けられる穴部４４が形成されている。穴
部４４は、図４に示すように第一脚部４１に２カ所なら
びに第二脚部に１カ所形成されている。穴部４４は第一
脚部４１および第二脚部４２の蓄圧容器２０側の端部と
反蓄圧容器側の端部とを連通している。第一脚部４１に
形成されている２カ所の穴部４４は、ねじ孔４１１を挟
んだ位置に形成されている。第二脚部４２に形成されて
いる穴部４４は、ねじ孔４１１と対向する位置に形成さ
れている。穴部４４にはボルト７０の雄ねじ部７１とね
じ結合される雌ねじ部が形成されている。この雌ねじ部
は、穴部４４の全長の全てまたは一部に形成されてい
る。The bolt 70 as a fixing member fixes the pressure accumulating container 20 and the screw member 40. The bolt 70 is formed with a male screw portion 71 and a contact portion 72. The contact portion 72 is formed at the tip of the bolt 70, and when the bolt 70 is fastened to the screw member 40, the contact portion 72 contacts the pressure accumulating container 20. The screw member 40 is formed with a hole 44 to which the bolt 70 is attached. As shown in FIG. 4, two holes 44 are formed on the first leg 41 and one hole 44 is formed on the second leg. The hole 44 communicates the end of the first leg 41 and the second leg 42 on the side of the pressure accumulator 20 with the end on the side of the anti-accumulator. The two hole portions 44 formed in the first leg portion 41 are formed at positions sandwiching the screw hole 411. The hole 44 formed in the second leg 42 is formed at a position facing the screw hole 411. The hole 44 is formed with a female screw portion that is screwed to the male screw portion 71 of the bolt 70. The female screw portion is formed on all or part of the entire length of the hole portion 44.
【００２１】ねじ部材４０の穴部４４にボルト７０が締
め付けられると、ボルト７０の先端の当接部７２は蓄圧
容器２０と当接する。これにより、３本のボルト７０に
よって蓄圧容器２０が挟持された状態となり、蓄圧容器
２０とねじ部材４０とは固定される。穴部４４を第一脚
部４１に２カ所、ならびに第二脚部４２に１カ所形成す
ることにより、蓄圧容器２０は穴部４４にねじ結合され
たボルト７０で３点から支持される。そのため、蓄圧容
器２０とねじ部材４０とはボルト７０により安定的に固
定される。When the bolt 70 is tightened in the hole 44 of the screw member 40, the contact portion 72 at the tip of the bolt 70 contacts the pressure accumulating container 20. As a result, the pressure accumulating container 20 is sandwiched by the three bolts 70, and the pressure accumulating container 20 and the screw member 40 are fixed. By forming the holes 44 at two positions on the first leg 41 and at one position on the second leg 42, the pressure accumulating container 20 is supported from three points by the bolts 70 screwed to the holes 44. Therefore, the pressure accumulating container 20 and the screw member 40 are stably fixed by the bolt 70.
【００２２】次に、本実施例による蓄圧式燃料噴射装置
３０の製造手順について説明する。図３に示すように、
蓄圧容器２０にねじ部材４０が取り付けられる。ねじ部
材４０の第一脚部４１および第二脚部４２は蓄圧容器２
０の平坦部２４を挟み込んで取り付けられる。ねじ部材
４０は、蓄圧容器２０の平坦部２４に嵌合され仮固定さ
れる。Next, the procedure for manufacturing the pressure-accumulation type fuel injection device 30 according to this embodiment will be described. As shown in FIG.
The screw member 40 is attached to the pressure accumulating container 20. The first leg portion 41 and the second leg portion 42 of the screw member 40 are the accumulator container 2
It is attached by sandwiching the flat portion 24 of 0. The screw member 40 is fitted and temporarily fixed to the flat portion 24 of the pressure accumulating container 20.
【００２３】図３に示すように蓄圧容器２０にねじ部材
４０が仮固定されると、ねじ部材４０のねじ孔４１１に
コネクタ５０がねじ結合される。上述のように、コネク
タ５０をねじ孔４１１に締め付けることにより、コネク
タ５０の当接部５２と燃料パイプ６０の肩部６２とが当
接する。当接部５２と肩部６２とが当接した状態でさら
にコネクタ５０をねじ孔４１１に締め付けると、燃料パ
イプ６０の当接部６１は蓄圧容器２０のシート部２３ａ
に当接する。コネクタ５０を所定の締め付け力でねじ孔
４１１に締め付けることにより、蓄圧容器２０のシート
部２３ａと燃料パイプ６０の当接部６１とは液密にシー
ルされる。また、ねじ部材４０のねじ孔４１１にコネク
タ５０を締め付けると、燃料パイプ６０の軸力によりね
じ部材４０と蓄圧容器２０とは固定される。When the screw member 40 is temporarily fixed to the pressure accumulating container 20 as shown in FIG. 3, the connector 50 is screwed into the screw hole 411 of the screw member 40. As described above, by tightening the connector 50 in the screw hole 411, the contact portion 52 of the connector 50 and the shoulder portion 62 of the fuel pipe 60 contact each other. When the connector 50 is further tightened in the screw hole 411 in the state where the contact portion 52 and the shoulder portion 62 are in contact with each other, the contact portion 61 of the fuel pipe 60 causes the contact portion 61 of the fuel accumulator 20 to have the seat portion 23a.
Abut. By tightening the connector 50 in the screw hole 411 with a predetermined tightening force, the seat portion 23a of the accumulator 20 and the contact portion 61 of the fuel pipe 60 are liquid-tightly sealed. Further, when the connector 50 is tightened in the screw hole 411 of the screw member 40, the screw member 40 and the accumulator 20 are fixed by the axial force of the fuel pipe 60.
【００２４】コネクタ５０により燃料パイプ６０が蓄圧
容器２０に締め付け固定された後、ねじ部材４０の穴部
４４にボルト７０が取り付けられる。ボルト７０は先端
の当接部７２が蓄圧容器２０と当接するまで締め付けら
れる。After the fuel pipe 60 is fastened and fixed to the accumulator 20 by the connector 50, the bolt 70 is attached to the hole 44 of the screw member 40. The bolt 70 is tightened until the contact portion 72 at the tip contacts the pressure accumulating container 20.
【００２５】ボルト７０が穴部４４に締め付けられボル
ト７０の当接部７２が蓄圧容器２０に当接することによ
り、蓄圧容器２０とねじ部材４０とは本固定される。ま
た、ボルト７０の先端の当接部７２は、図１に示すよう
に締め付け力により蓄圧容器２０の外壁２０ａにくい込
んでいる。すなわち、ボルト７０の当接部７２は蓄圧容
器２０の外壁を変形させている。これにより、蓄圧容器
２０とねじ部材４０とはボルト７０の挟持による図１お
よび図４の上下方向への移動だけでなく、蓄圧容器２０
の軸方向すなわち図４の左右方向、ならびに蓄圧容器２
０の軸およびコネクタ５０の軸に垂直な方向すなわち図
１の左右方向への移動も防止される。The bolt 70 is tightened in the hole 44 and the contact portion 72 of the bolt 70 abuts the pressure accumulator container 20, whereby the pressure accumulator container 20 and the screw member 40 are permanently fixed. Further, as shown in FIG. 1, the contact portion 72 at the tip of the bolt 70 is embedded in the outer wall 20a of the pressure accumulating container 20 due to the tightening force. That is, the contact portion 72 of the bolt 70 deforms the outer wall of the pressure accumulating container 20. As a result, not only the pressure accumulating container 20 and the screw member 40 move vertically in FIG. 1 and FIG.
In the axial direction, that is, in the left-right direction of FIG.
Movement in a direction perpendicular to the axis of 0 and the axis of the connector 50, that is, the horizontal direction in FIG. 1 is also prevented.
【００２６】以上、説明したように本発明の第１実施例
によると、蓄圧容器２０とねじ部材４０とはボルト７０
により固定されている。そのため、蓄圧容器２０とねじ
部材４０とは大きな力で固定されている。これにより、
ねじ部材４０とコネクタ５０とのねじ結合による締結力
は蓄圧容器２０のシート部２３ａと燃料パイプ６０の当
接部６１との間の液密の保持に利用される。その結果、
コネクタ５０あるいは燃料パイプ６０の周囲に外力が作
用した場合でも、シート部２３ａと当接部６１との間の
変形が防止され液密を保持できると同時に、ボルト７０
の締結力により蓄圧容器２０とねじ部材４０とは強固に
固定することができる。As described above, according to the first embodiment of the present invention, the pressure accumulating container 20 and the screw member 40 are provided with the bolt 70.
It is fixed by. Therefore, the pressure accumulator 20 and the screw member 40 are fixed with a large force. This allows
The fastening force by the screw connection between the screw member 40 and the connector 50 is used for maintaining liquid tightness between the seat portion 23a of the pressure accumulating container 20 and the contact portion 61 of the fuel pipe 60. as a result,
Even if an external force is applied to the periphery of the connector 50 or the fuel pipe 60, the deformation between the seat portion 23a and the contact portion 61 is prevented, liquid tightness can be maintained, and at the same time, the bolt 70
The pressure accumulating container 20 and the screw member 40 can be firmly fixed by the fastening force.
【００２７】また、本発明の第１実施例では、ボルト７
０は蓄圧容器２０を挟んで設置されている。また、ボル
ト７０はコネクタ５０および燃料パイプ６０が取り付け
られる第一脚部４１に２カ所、ならびに第一脚部４１に
対向する第二脚部４２に１カ所の合計３カ所に設置さ
れ、蓄圧容器２０とねじ部材４０とを固定している。す
なわち、ボルト７０は蓄圧容器２０とねじ部材４０とを
３点で固定している。そのため、蓄圧容器２０とねじ部
材４０とはボルト７０により安定的かつ強固に固定され
る。Further, in the first embodiment of the present invention, the bolt 7
0 is installed with the pressure accumulator container 20 sandwiched therebetween. Further, the bolts 70 are installed at three locations, that is, two locations on the first leg portion 41 to which the connector 50 and the fuel pipe 60 are attached, and one location on the second leg portion 42 facing the first leg portion 41. 20 and the screw member 40 are fixed. That is, the bolt 70 fixes the pressure accumulating container 20 and the screw member 40 at three points. Therefore, the pressure accumulating container 20 and the screw member 40 are stably and firmly fixed by the bolt 70.
【００２８】ボルト７０の先端の当接部７２は蓄圧容器
２０の外壁２０ａにくい込んでいるため、蓄圧容器２０
とねじ部材４０とは３次元の各方向への相対的な移動が
制限される。そのため、蓄圧容器２０とねじ部材４０と
を安定的かつ強固に固定することができる。Since the abutment portion 72 at the tip of the bolt 70 is embedded in the outer wall 20a of the pressure accumulator container 20, the pressure accumulator container 20 is prevented.
The relative movement of the screw member 40 and the screw member 40 in each of the three-dimensional directions is restricted. Therefore, the pressure accumulating container 20 and the screw member 40 can be fixed stably and firmly.
【００２９】（第２実施例）本発明の第２実施例による
蓄圧式燃料噴射装置３０を図５に示す。第１実施例と実
質的に同一の構成部位には同一の符号を付し、説明を省
略する。本発明の第２実施例による蓄圧式燃料噴射装置
３０は、固定部材の形状が第１実施例と異なる。第２実
施例では、固定部材として球形状のボール部材８０を用
いる。(Second Embodiment) FIG. 5 shows a pressure-accumulation type fuel injection device 30 according to a second embodiment of the present invention. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The pressure-accumulation fuel injection device 30 according to the second embodiment of the present invention differs from the first embodiment in the shape of the fixing member. In the second embodiment, a spherical ball member 80 is used as the fixing member.
【００３０】図５に示すように、第２実施例ではねじ部
材４０の第一脚部４１および第二脚部４２に形成されて
いる穴部４４にボール部材８０が設置されている。ボー
ル部材８０は、穴部４４に圧入され、端部８１が蓄圧容
器２０の外壁２０ａに当接している。ボール部材８０は
蓄圧容器２０の外壁２０ａに当接することにより、蓄圧
容器２０の外壁２０ａにくい込んでいる。As shown in FIG. 5, in the second embodiment, the ball member 80 is installed in the hole portion 44 formed in the first leg portion 41 and the second leg portion 42 of the screw member 40. The ball member 80 is press-fitted into the hole portion 44, and the end portion 81 is in contact with the outer wall 20 a of the pressure accumulating container 20. The ball member 80 abuts on the outer wall 20a of the pressure accumulating container 20 so that the ball member 80 is embedded in the outer wall 20a of the pressure accumulating container 20.
【００３１】第２実施例では、穴部４４にボール部材８
０を圧入し、蓄圧容器２０の外壁２０ａにボール部材８
０をくい込ませることにより、蓄圧容器２０とねじ部材
４０とは固定される。これにより、蓄圧容器２０とねじ
部材４０とは第１実施例と同様に３次元の各方向への相
対的な移動が制限される。そのため、蓄圧容器２０とね
じ部材４０とを安定的かつ強固に固定することができ
る。In the second embodiment, the ball member 8 is provided in the hole 44.
0 is press-fitted into the outer wall 20a of the pressure accumulating container 20 and the ball member 8
By accommodating 0, the pressure accumulating container 20 and the screw member 40 are fixed. As a result, the relative movement of the pressure accumulating container 20 and the screw member 40 in each of the three-dimensional directions is restricted as in the first embodiment. Therefore, the pressure accumulating container 20 and the screw member 40 can be fixed stably and firmly.
【００３２】なお、上記で説明した第１実施例または第
２実施例の変形例として、ねじ部材４０の穴部４４に図
６に示すように固定部材としてのピン部材９０を圧入す
ることもできる。穴部４４にピン部材９０を圧入するこ
とにより、第１実施例または第２実施例と同様に蓄圧容
器２０とねじ部材４０とを安定的かつ強固の固定するこ
とができる。As a modification of the first or second embodiment described above, a pin member 90 as a fixing member can be press-fitted into the hole 44 of the screw member 40 as shown in FIG. . By press-fitting the pin member 90 into the hole 44, the pressure accumulating container 20 and the screw member 40 can be stably and firmly fixed as in the first or second embodiment.
【図１】本発明の第１実施例による蓄圧式燃料噴射装置
を示す模式的な断面図である。FIG. 1 is a schematic cross-sectional view showing a pressure accumulation type fuel injection device according to a first embodiment of the present invention.
【図２】本発明の第１実施例による蓄圧式燃料噴射装置
を適用した燃料噴射システムを示す模式図である。FIG. 2 is a schematic diagram showing a fuel injection system to which the pressure accumulation type fuel injection device according to the first embodiment of the present invention is applied.
【図３】本発明の第１実施例による蓄圧式燃料噴射装置
の要部を示す模式的な断面図である。FIG. 3 is a schematic cross-sectional view showing a main part of a pressure accumulation type fuel injection device according to a first embodiment of the present invention.
【図４】図１の矢印Ｖ方向から見た矢視図である。4 is a view seen from the direction of arrow V in FIG.
【図５】本発明の第２実施例による蓄圧式燃料噴射装置
の要部を示す模式的な断面図である。FIG. 5 is a schematic cross-sectional view showing a main part of a pressure accumulation type fuel injection device according to a second embodiment of the present invention.
【図６】本発明の第１実施例および第２実施例の変形例
による蓄圧式燃料噴射装置を示す図であって、変形例の
要部を示す模式的な断面図である。FIG. 6 is a view showing a pressure accumulation type fuel injection device according to a modification of the first embodiment and the second embodiment of the present invention, and is a schematic cross-sectional view showing the main part of the modification.
【図７】従来の蓄圧式燃料噴射装置の要部を示す模式的
な断面図である。FIG. 7 is a schematic cross-sectional view showing a main part of a conventional pressure-accumulation fuel injection device.
１ 燃料噴射システム １０ エンジン ２０ 蓄圧容器 ２０ａ 外壁 ２１ 蓄圧室 ２３ 通孔 ２３ａ シート部 ３０ 蓄圧式燃料噴射装置 ４０ ねじ部材 ４１ 第一脚部 ４２ 第二脚部 ４４ 穴部 ５０ コネクタ（締結部材） ５２ 雄ねじ部 ６０ 燃料パイプ（締結部材） ６１ 当接部 ７０ ボルト（固定部材） ７１ 雄ねじ部 ８０ ボール部材（固定部材） ９０ ピン部材（固定部材） ４１１ ねじ孔 ４１１ａ 雌ねじ部 1 Fuel injection system 10 engine 20 Pressure storage container 20a outer wall 21 Accumulation chamber 23 through holes 23a seat section 30 Accumulation type fuel injection device 40 screw member 41 First leg 42 Second leg 44 holes 50 connector (fastening member) 52 Male thread 60 Fuel pipe (fastening member) 61 abutting part 70 bolt (fixing member) 71 Male thread 80 Ball member (fixing member) 90 pin member (fixing member) 411 screw hole 411a female thread
Claims (7)
され前記蓄圧室と外壁とを連通する通孔を有する蓄圧容
器と、 前記蓄圧容器を両側から挟み込む第一脚部および第二脚
部を有し、前記第一脚部にねじ孔が形成されているねじ
部材と、 前記シート部に当接可能な当接部、ならびに前記ねじ孔
にねじ結合可能な雄ねじ部を有し、前記ねじ部材の前記
ねじ孔に前記雄ねじ部をねじ結合し締め付けることによ
り前記シート部に前記当接部が液密に締め付け固定され
る締結部材と、 前記ねじ部材を前記蓄圧容器に固定する固定部材と、 を備えることを特徴とする蓄圧式燃料噴射装置。1. A pressure accumulating chamber, and a pressure accumulating container having a through hole that forms a seat part in the middle to communicate the accumulating chamber and an outer wall, and a first leg and a second leg that sandwich the pressure accumulating container from both sides. A screw member having a screw hole formed in the first leg portion, an abutting portion capable of abutting on the seat portion, and a male screw portion screw-connectable to the screw hole; A fastening member that liquid-tightly fastens and fixes the contact portion to the seat portion by screwing and fastening the male screw portion to the screw hole, and a fixing member that fixes the screw member to the accumulator. A pressure-accumulation fuel injection device, comprising:
記第二脚部の前記蓄圧容器側の端面と反蓄圧容器側の端
面とを連通して形成されている穴部に設置されているこ
とを特徴とする請求項１記載の蓄圧式燃料噴射装置。2. The fixing member is installed in a hole formed by connecting the end surface of the first leg portion and the second leg portion on the side of the pressure accumulating vessel and the end surface on the side of the anti-accumulating vessel. The pressure-accumulation fuel injection device according to claim 1, wherein
いる雌ねじ部にねじ結合される雄ねじ部を有することを
特徴とする請求項２記載の蓄圧式燃料噴射装置。3. The pressure-accumulation fuel injection device according to claim 2, wherein the fixing member has a male screw portion screwed to a female screw portion formed in the hole.
記穴部に圧入されていることを特徴とする請求項２記載
の蓄圧式燃料噴射装置。4. The pressure-accumulation fuel injection device according to claim 2, wherein the fixing member is formed in a spherical shape and is press-fitted into the hole.
ならびに前記第二脚部に１カ所設置され、前記ねじ部材
と前記蓄圧容器とを三点で固定していることを特徴とす
る請求項１から４のいずれか一項記載の蓄圧式燃料噴射
装置。5. The fixing member is installed at two places on the first leg and one place on the second leg, and fixes the screw member and the pressure accumulator at three points. The pressure-accumulation fuel injection device according to any one of claims 1 to 4.
は、前記蓄圧容器と当接し、当接した前記固定部材によ
り前記蓄圧容器は変形していることを特徴とする請求項
１から５のいずれか一項記載の蓄圧式燃料噴射装置。6. The pressure-accumulation container side end of the fixing member is in contact with the pressure-accumulation container, and the pressure-accumulation container is deformed by the contacting fixing member. The pressure-accumulation fuel injection device according to claim 1.
圧式燃料噴射装置の製造方法であって、 前記蓄圧容器にねじ部材を仮固定する段階と、 前記蓄圧容器に取り付けられた前記ねじ部材の前記ねじ
孔に前記締結部材を締め付ける段階と、 前記締結部材が前記蓄圧容器部材に締め付けられた後、
前記ねじ部材に前記固定部材を取り付け、前記蓄圧容器
と前記ねじ部材とを本固定する段階と、 を含むことを特徴とする蓄圧式燃料噴射装置の製造方
法。7. The method for manufacturing a pressure accumulating fuel injection device according to claim 1, wherein the screw member is temporarily fixed to the pressure accumulating container, and the pressure accumulating container is attached to the pressure accumulating container. Tightening the fastening member into the screw hole of the screw member, and after the fastening member is tightened to the pressure accumulator container member,
Attaching the fixing member to the screw member, and finally fixing the pressure accumulating container and the screw member, and a method of manufacturing a pressure accumulating fuel injection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001252849A JP2003065182A (en) | 2001-08-23 | 2001-08-23 | Accumulator fuel injection device and manufacturing method of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001252849A JP2003065182A (en) | 2001-08-23 | 2001-08-23 | Accumulator fuel injection device and manufacturing method of same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003065182A true JP2003065182A (en) | 2003-03-05 |
Family
ID=19081255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001252849A Pending JP2003065182A (en) | 2001-08-23 | 2001-08-23 | Accumulator fuel injection device and manufacturing method of same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003065182A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013511637A (en) * | 2009-11-23 | 2013-04-04 | ロバート ボッシュ ゲーエムベーハー | Joint for pressure piping of common rail injection system |
-
2001
- 2001-08-23 JP JP2001252849A patent/JP2003065182A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013511637A (en) * | 2009-11-23 | 2013-04-04 | ロバート ボッシュ ゲーエムベーハー | Joint for pressure piping of common rail injection system |
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