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1. 发明专利

JPH10160025A SOLENOID FUEL INJECTION VALVE AND ITS MANUFACTURE 失效
公开(公告)号：JPH10160025A
公开(公告)日：1998-06-16
申请号：JP32179496
申请日：1996-12-02
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： GUNJI KENICHI , KANAMARU NAONOBU , YOKOYAMA MIZUHO , ISHIKAWA TORU , TERANISHI TAKAO
IPC分类号： F16K31/06
摘要： PROBLEM TO BE SOLVED: To improve sealed properties even when supply fuel pressure is high such as an inter-cylinder direct fuel injection method, by respectively connecting the upper and lower ends of a cylindrical ring to a core and a yoke in a condition that the remaining compressed stress is maintained which is larger than the remaining stress generated when connecting. SOLUTION: A core 1 is inserted in a yoke 2, and the core 1 and the yoke 2 are mutually connected in the upper end part of the yoke 2. A coil bobbin 13 is inserted in a space between the core 1 and the yoke 2. A coil 10 is retained in this space. Also, a ring 9 is fixed between the core 1 and the yoke 2, and the material of the ring 9 is a SUS material harder in comparison with the core 1 and the yoke 2. The upper end part of the ring 9 and the lower end part of the ring 9 are respectively bitten into the lower end surface of the core 1 and the inside lower part of the yoke 2. The core 1 and the yoke 2 are connected to each other after the core 1 is previously pressurized, therefore the remaining compressed stress is generated in the upper and lower end parts of the ring 9, and sealed properties can be improved.

2. 发明专利

JP2007182903A Fuel injection valve 审中-公开
标题翻译：燃油喷射阀
公开(公告)号：JP2007182903A
公开(公告)日：2007-07-19
申请号：JP2007101958
申请日：2007-04-09
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： SHIMIZU SHUICHI , KAGIYAMA ARATA , GUNJI KENICHI
IPC分类号： F02M61/16 , F02M51/06 , F02M57/02 , F02M69/46
CPC分类号： Y02T10/32
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection valve usable over a long period, by improving impact resistance and abrasion resistance of a constituting part of the fuel injection valve. SOLUTION: Low temperature nitriding of 350 to 480°C is applied to a nozzle body 4 having a fuel injection hole 41, a valve guide 17, a valve element 5, a moving piece 6 and a stopper 16. A guide sleeve 14 moving and guiding the moving piece 6 is pressed in the tip inner periphery of a fixed iron core 3, and a hard coating film is applied to the guide sleeve 14 by a highly hard nonmagnetic member. An annular chip-shaped valve guide 17 and a guide presser 18 are superposably arranged in the nozzle body 4. The guide presser 18 is formed of a metallic material of non-nitriding, and the valve guide 17 is fixed by the valve presser 18 by tensionally joining this guide presser 18 to the inner periphery of the nozzle body 4 by being plastically deformed by pressurizing force from above in the nozzle body 4. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：通过提高燃料喷射阀的构成部件的耐冲击性和耐磨耗性，提供长时间使用的燃料喷射阀。解决方案：对具有燃料喷射孔41，导阀17，阀元件5，移动件6和止动件16的喷嘴体4施加350至480℃的低温氮化。导向套筒移动和引导移动件6在固定铁芯3的尖端内周中被按压，并且硬涂膜通过高硬度非磁性部件施加到引导套筒14。环形片状阀引导件17和引导按压器18可重叠地布置在喷嘴体4中。引导按压器18由非氮化的金属材料形成，并且阀引导件17由阀按压器18固定通过在喷嘴体4中从上方施加压力而使该引导压脚18张紧地连接到喷嘴体4的内周。（C）2007，JPO＆INPIT

3. 发明专利

JP2003120473A MANUFACTURING METHOD OF NOZZLE OR ORIFICE PLATE OF LIQUID INJECTION VALVE, NOZZLE OR ORIFICE PLATE OF LIQUID INJECTION VALVE, AND FUEL INJECTION VALVE 审中-公开
公开(公告)号：JP2003120473A
公开(公告)日：2003-04-23
申请号：JP2001320063
申请日：2001-10-18
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： HIGUMA MASATO , GUNJI KENICHI , KAWAHARA KEIJI
IPC分类号： F02M61/18 , B05B1/00
摘要： PROBLEM TO BE SOLVED: To press a nozzle part of an injector. SOLUTION: In a manufacturing method of a nozzle having an orifice to measure the liquid or an orifice plate, an inlet side hole and an outlet side hole of the orifice are constituted of holes having the shearing surface. In the manufacturing method of the nozzle and the orifice plate formed of holes having a connecting face of both holes, the holes are pressed from the orifice outlet side in a first step. A seat part is transferred from the orifice inlet side in a second step. Punching is performed from the orifice inlet side in a third step. The productivity is improved thereby, and the fuel is metered with high accuracy.

4. 发明专利

JPH10288114A ELECTROMAGNETIC FUEL INJECTION VALVE 失效
公开(公告)号：JPH10288114A
公开(公告)日：1998-10-27
申请号：JP9341197
申请日：1997-04-11
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KAWAHARA KEIJI , YOKOYAMA MIZUHO , GUNJI KENICHI
IPC分类号： F02M51/06 , F02M69/00
摘要： PROBLEM TO BE SOLVED: To distribute the fuel to each cylinder uniformly as much as possible and lessen a change in the injection quantity of the fuel due to a change in the intaking negative pressure, which is caused by a change of the engine speed. SOLUTION: A nozzle is punched out from the fuel inlet side so as to restrain the dispersion of the flow quantity (of the fuel) at each jet orifice 5, thereby equalizing the fuel distribution among respective cylinders. In addition, a relational expression N +2.28X (where N denotes a ratio of the volume between a seat part 8a of a nozzle 4 and the jet orifice 5 to the total area of a plurality of jet orifices 5, while X denotes an opening period of a movable valve 3) should be satisfied in order to restrain a change in the injection quantity of the fuel.

5. 发明专利

JP2004346784A Plunger stroke adjusting method and adjusting device for fuel injection device 审中-公开
公开(公告)号：JP2004346784A
公开(公告)日：2004-12-09
申请号：JP2003142823
申请日：2003-05-21
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： KIMURA YASUHIKO , OMORI TAKAHIRO , MATSUMARU TAKESHI , KUBOTA EIICHI , GUNJI KENICHI , NAKANO MASABUMI , OGURA KIYOTAKA
IPC分类号： F02M51/06
摘要： PROBLEM TO BE SOLVED: To solve the problem that stroke is changed due to warpage and deflection of an adjusting member, and processing and assembling accuracy of a constituting component before and after the connection in a method for adjusting a plunger stroke by providing the adjusting member of optional thickness between a housing part and a nozzle part.
SOLUTION: The nozzle part 21 is positioned at the same position as after the connection before plastic flow connection of the housing part 22 and the nozzle part 21, and stroke can be measured in a condition close to a condition after the connection by measuring stroke while the nozzle part 21 is pushed and pressed to the housing part 22. Thereby, change of the stroke before and after the plastic flow connection can be reduced, and a high accurate stroke adjustment can be performed.
COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JP2004293559A Fuel injection valve 有权
标题翻译：燃油喷射阀
公开(公告)号：JP2004293559A
公开(公告)日：2004-10-21
申请号：JP2004217600
申请日：2004-07-26
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： GUNJI KENICHI , TANABE YOSHIYUKI
IPC分类号： F02M51/08 , F02M51/06 , F02M61/18
摘要： PROBLEM TO BE SOLVED: To make keepable coaxiality after connection of parts, without influence of single part accuracy of nozzle parts in a fuel injection valve.
SOLUTION: The fuel injection valve is constituted in such a manner that: a plate is fit to a swirler of the nozzle so as to sandwich the swirler therebetween; centering of a seat part and an inner diameter part of the swirler of the nozzle is performed by using a positioning pin; plastic flow of the plate is partially performed; and nozzle, swirler, and plate are connected and fixed to each other. The swirler, in which high coaxiality with an orifice of the nozzle is required, is sandwiched and fixed between the plate and nozzle. Since spring back does not act after the fixing, the high coaxiality of the orifice and swirler of the nozzle can be kept.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：在连接零件之后保持同轴度，而不影响喷嘴部件在燃油喷射阀中的单一精度。解决方案：燃料喷射阀以这样的方式构成：板被配合到喷嘴的旋流器，以便将旋流器夹在其间; 通过使用定位销来执行喷嘴的旋转器的座部和内径部的定心; 部分执行板的塑性流动; 喷嘴，旋流器和板相互连接固定。需要与喷嘴的孔口具有高同轴度的旋流器夹在并固定在板和喷嘴之间。由于弹簧在固定后不起作用，因此可以保持喷嘴的喷嘴和旋流器的高同轴度。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2004108219A Fuel injection valve 有权
公开(公告)号：JP2004108219A
公开(公告)日：2004-04-08
申请号：JP2002270882
申请日：2002-09-18
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： MAEKAWA NORIYUKI , TANABE YOSHIYUKI , ISHIKAWA TORU , YAMAKADO MAKOTO , GUNJI KENICHI
IPC分类号： F02M51/06
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection valve of small minimum injection which increases a force in a valve closing direction applied to a valve element and shortens and controls the valve closing lag time of the valve element without increasing the part number or increasing the total length/outside diameter.
SOLUTION: A projecting part 22 formed partly in the circumferential direction is provided on at least one of the lower end face of an inner fixed core 9 and the upper end face of a moving core 4. The force in the valve closing direction by the elasticity of a rod 7 can be obtained close to a valve opening state in addition to the force in the valve closing direction generated by a spring 20.
COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2001050140A FUEL INJECTION VALVE 失效
公开(公告)号：JP2001050140A
公开(公告)日：2001-02-23
申请号：JP22342199
申请日：1999-08-06
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KAWAHARA KEIJI , GUNJI KENICHI , KOSHIZAKA ATSUSHI
IPC分类号： F02M61/18
摘要： PROBLEM TO BE SOLVED: To suppress grinding process to the minimum, and improve work accuracy of a nozzle with a good efficiency by forming a circular cone shaped recessed part facing off against a movable valve from a plurality of surfaces of two or more stages, and differing an angle of a surface having at least a seal function of the movable valve from an angle of a surface faced to an orifice inlet part. SOLUTION: In the case where a fuel injection valve is manufactured, firstly, a seat 1b is pressed in along a cylindrical part 13a of a nozzle raw material 13, and is transferred and molded by a mold punch 14. In this time, a dice 15 is put on a lower surface 13b of the nozzle raw material 13. Then, a plastic fluid protrusion part 13c pushed out to a bottom lower surface of the nozzle raw material 13 is mechanically worked and eliminated. An orifice is worked by a punch 17 serving the seat part 1b as a guide of a punch guide 16. After that, the nozzle raw material 13 is hardened, and the cylindrical part 13a and the seat 1b are simultaneously worked by a grinding wheel having an angle θ' larger than a holding angle θ of the seat 1b. It is thus possible to improve a work accuracy without reducing productivity by plastic work.

9. 发明专利

JPH10196486A INJECTOR 失效
公开(公告)号：JPH10196486A
公开(公告)日：1998-07-28
申请号：JP618597
申请日：1997-01-17
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： HAMADA YASUHISA , TATSUMI SHIGEO , GUNJI KENICHI , YOSHINARI YUKIHIRO
IPC分类号： F02M51/06
摘要： PROBLEM TO BE SOLVED: To achieve miniaturization and weight reduction as well as to improve performance of an injector by enhancing magnetic attracting efficiency of a movable core. SOLUTION: When an electromagnetic coil 10 is electrified, a fixed core 2, a yoke 3, and a movable core 4 form a magnetic circuit, the movable core 4 is attracted to the fixed core 2 side against force of a return spring 6, and a fuel passage for injection is opened. Steps 4A, 4B in the axial direction are formed on the movable core 4, and one end surface 2A of the fixed core 2 is faced to the step difference surface 4A through a gap G1. A projecting part 3' of the yoke 3 is provided on the inner side of the yoke, the projecting part 3' is faced to the step difference surface 4B in the position on the axial magnetic attracting side through a gap G2, and a plurality of magnetic attraction gaps in the axial direction, to be taken as parts of the magnetic circuit are constituted by the gaps G1, G2.

10. 发明专利

JP2005083289A Fuel injection valve 有权
标题翻译：燃油喷射阀
公开(公告)号：JP2005083289A
公开(公告)日：2005-03-31
申请号：JP2003317660
申请日：2003-09-10
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： KOSHIZAKA ATSUSHI , KAWAHARA KEIJI , ONOSE SHIN , GUNJI KENICHI
IPC分类号： F02M51/06
摘要： PROBLEM TO BE SOLVED: To obtain a fuel injection valve without fuel leakage, having a good injection characteristic, having its heat processing time shortened and the number of its components reduced by increasing stiffness of a peripheral part of a connection groove of a nozzle and plastically connecting the nozzle with a housing.
SOLUTION: The fuel injection valve is a fuel injection valve for cylinder injection of fuel having a slender nozzle (long nozzle). The fuel injection valve 1 is composed of a combination of cylindrical components and a stator side magnetic circuit is formed by the housing 2 made of magnetic material, a yoke 3, and a core 4. A movable valve 5 covered with the magnetic circuit is axially moved by energizing an electromagnetic solenoid coil 17, and the edge part of the movable valve 5 is covered with the nozzle 6 connected to the housing 2. The nozzle 6 is inserted to a stepped inner diameter surface of the housing 2 through a ring 18. At a connection part 7, the inner periphery edge part of the housing 2 is locally pressed for plastically deforming the housing 2, and material is made to plastically flow in the annular connection groove 8 provided at the outer periphery of the nozzle 6 for connecting. The connection groove could be a rough surface if necessary. This invention is characterized by the difference in stiffness between a plastic deformation pressure receiving surface of the periphery of the nozzle connection groove and that of the housing to secure a sealing performance of the connection part. It is also characterized by making the stiffness of the nozzle higher than that of the housing.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题：为了获得没有燃料泄漏的燃料喷射阀，具有良好的喷射特性，其热处理时间缩短并且通过增加一个连接槽的周边部分的刚度来降低其部件的数量喷嘴并将喷嘴与壳体塑性连接。解决方案：燃料喷射阀是用于气缸喷射具有细长喷嘴（长喷嘴）的燃料的燃料喷射阀。燃料喷射阀1由圆筒部件的组合构成，并且定子侧磁路由由磁性材料制成的壳体2，磁轭3和磁芯4形成。用磁路覆盖的可动阀5轴向通过激励电磁螺线管线圈17移动，并且可动阀5的边缘部分被连接到壳体2的喷嘴6覆盖。喷嘴6通过环18插入壳体2的阶梯状内径表面。在连接部7，壳体2的内周缘部被局部挤压，使壳体2塑性变形，使材料塑性地流到设置在喷嘴6的外周的环状连接槽8内，进行连接。如果需要，连接槽可以是粗糙的表面。本发明的特征在于喷嘴连接槽周边的塑性变形压力接收表面与壳体的塑性变形压力接收表面之间的刚度差，以确保连接部件的密封性能。其特征还在于使喷嘴的刚度高于壳体的刚度。版权所有（C）2005，JPO＆NCIPI

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