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1. 发明专利

JP2001096449A MANUFACTURING METHOD AND DEVICE OF SEALING FACE OF VALVE 失效
公开(公告)号：JP2001096449A
公开(公告)日：2001-04-10
申请号：JP27815999
申请日：1999-09-30
申请人： HITACHI LTD
发明人： YOSHIDA MICHIO , KUBOTA EIICHI , MATSUMARU TAKESHI , KOBAYASHI YUTAKA
IPC分类号： B24B15/00 , F02M61/18
摘要： PROBLEM TO BE SOLVED: To manufacture a sealing face for a valve seat forming body whose valve seat is eccentric in simple structure. SOLUTION: With a tool 6 with spherical body-like shaft pressed against the sealing face 1a of the valve seat forming body 1, the tool 6 with spherical body-like shaft rotated (9) around another axis (A axis) inclined toward the center axis (B axis) of the sealing face 1a of the valve seat forming body 1, and the tool 6 with spherical body-like shaft rotatedvalve seat forming body 1, the valve seat forming body 1, and the tool 6with spherical body-like shaft are slidden with each other.

2. 发明专利

JPH01249959A FUEL INJECTION VALVE AND WORKING METHOD THEREOF 失效
公开(公告)号：JPH01249959A
公开(公告)日：1989-10-05
申请号：JP7586988
申请日：1988-03-31
申请人： HITACHI LTD
发明人： MASUDA MASAMI , NISHIGUCHI TAKASHI , KONDO MASAKAZU , MIYASHITA SUEKICHI , KUBOTA EIICHI
IPC分类号： F02M51/06 , F02M51/08 , F02M61/16 , F02M61/18
摘要： PURPOSE:To secure the high performance and improve working performance by forming an injection hole on a sheet surface from a tapered hole part having the diameter on the outlet side which is smaller than the product of the inlet side diameter and contraction flew coefficient and a parallel hole part in cylindrical form which is connected with the tapered hole part. CONSTITUTION:A valve guide 2 which is held onto a yoke 11 and forms a swirller 3 having a groove 3a with a stopper 4 has a conical sheet surface 2a which cooperates with a ball valve 1a at the top edge of a plunger rod 1, and an injection hole H1 is drilled continuously. The injection hole H1 consists of a tapered hole part 2a having the diameter on the outlet side which is smaller than the product of the inlet side diameter and the contraction flow coefficient and a parallel hole part 2b in cylindrical form which is continuous to the tapered hole part 2a. Thus, the injection performance is improved, and the working performance can be improved.

3. 发明专利

JPS6477748A FUEL INJECTION VALVE NOZZLE HOLE BORING METHOD 失效
公开(公告)号：JPS6477748A
公开(公告)日：1989-03-23
申请号：JP23202487
申请日：1987-09-18
申请人： HITACHI LTD
发明人： KUBOTA EIICHI
IPC分类号： B23K26/382 , F02M61/18
摘要： PURPOSE:To secure an accurate fuel injection quantity, when a plurality of injection holes are formed in an injection nozzle part, by forming (N-1) injection holes out of total N injection holes, and by forming the last N-th injection hole on the basis of the measured result of injection quantity through these (N-1) holes. CONSTITUTION:A work piece 31 to be worked as the nozzle part of a fuel injection valve is fed from a work piece supply part 1 to a high-speed laser beam machine 2, where (N-1) injection holes out of total N injection holes 32 are worked with a relatively rough accuracy. Next, the work piece 31 is fed to a fluid flow rate measuring apparatus 3, and after the fluid flow rate discharged from (N-1) injection holes 32 has been actually measured, it is fed to a precision laser beam machine 4. And in a computer 6, the actually measured fluid flow rate is subtracted from the required total fluid flow rate to calculate the required fluid flow rate for the N-th injection hole 32, and also to calculate the hole diameter of the injection hole 32 to be worked, and then based on this hole diameter, the N-th injection hole 32 is accurately worked via a NC unit 7.

4. 发明专利

JPS58143950A GRINDING DEVICE OF INTERNAL CAM FOR CONTINUOUS AND DIFFERENT FORM CURVE 失效
公开(公告)号：JPS58143950A
公开(公告)日：1983-08-26
申请号：JP2556982
申请日：1982-02-19
申请人： HITACHI LTD
发明人： KUMAGAI MITSURU , KUBOTA EIICHI
IPC分类号： B24B19/12
摘要： PURPOSE:To grind an internal cam, by a method wherein a cam follower and a rotary grinding wheel are arranged coaxially, a master cam is installed on a slidable table concentrically with a work in a radial direction and an external circumferential surface of the master cam is driven by a driving wheel. CONSTITUTION:A cam follower 5 is secured on a base 4, which touches an inner circumferential surface of a master cam 6. A work 12 and the master cam 6 are installed on a table 11 which is slidable in a radial direction so that the work and the cam become concentric with each other. A grinding wheel 13 is arranged concentrically with the cam follower, the master cam 6 is turned by a driving wheel 7 and a cam surface is formed on the inner circumferential surface.

5. 发明专利

JP2004346785A Fuel injection valve and manufacturing method of fuel injection valve 有权
公开(公告)号：JP2004346785A
公开(公告)日：2004-12-09
申请号：JP2003142824
申请日：2003-05-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKANO MASABUMI , KUBOTA EIICHI , YOSHIDA MICHIO , OGURA KIYOTAKA
IPC分类号： F02M51/06
摘要： PROBLEM TO BE SOLVED: To provide a method relating to a fuel injection valve, to the fuel injection valve used for supplying ignition fuel to an internal combustion engine of an automobile and to its manufacturing method, which easily and surely forms a tip shape of a movable valve easy for maintenance of shape accuracy and a desired tip valve element portion.
SOLUTION: The invention is the fuel injection valve which comprises a nozzle equipped with a fuel injection hole and with a valve seat of a concaved conical shape, and the movable valve equipped with a movable iron core on one side and with a valve element portion of an almost spherical surface for seating in the seat on another side, in which the movable valve is slid with attraction generated by electromagnetic force and controls an injection amount from the fuel injection hole. The valve element portion comprises a main valve element portion 3a and the tip valve element portion 3c, the tip valve element portion is situated downstream of a contact portion of a valve seat section and its tip is formed in a rounded, convexed conical tip shape. This can facilitate accuracy maintenance of the tip shape of the valve element portion and improve productivity at the time of mass production.
COPYRIGHT: (C)2005,JPO&NCIPI

6. 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

7. 发明专利

JP2000167715A HONING METHOD GRINDING METHOD AND DEVICE FOR CARRYING OUT THESE METHODS 失效
公开(公告)号：JP2000167715A
公开(公告)日：2000-06-20
申请号：JP34515698
申请日：1998-12-04
申请人： HITACHI LTD
发明人： AIKAWA SHIGEO , KUBOTA EIICHI , YOSHIDA MICHIO
IPC分类号： B23H5/00
摘要： PROBLEM TO BE SOLVED: To restrain the block of a grinding wheel and increase a machining efficiency by using the grinding wheel whose bond layer for sticking the grain to a grinding wheel mother material is a conductive material, applying a voltage between the bond layer and a work and discharging during the honing of the work and removing the chip existing between both by an electrolysis operation. SOLUTION: At the honing time of a work 35 by using a grinding wheel 30, when the number of boring (grinding amount) is increased, the chip begins to block between the whetstone grains and a grinding resistance begins to increase. This grinding resistance is detected by a motive power sensor 24 provided on a chuck 21 as a load applied to the chuck 21 and the detection signal is sent to a controller 26. When the grinding resistance value by the motive power sensor 34 reaches a pre-determined value, an indication is given to a discharge voltage impression circuit 25 and a discharge phenomenon is generated between the bond layer of the grinding wheel 30 and ground surface and the chips between the whetstone 30 grains are removed by the electrolysis operation. Thereby, the block of the grinding wheel 30 is dissolved and the machining efficiency can be increased.

8. 发明专利

JP2577046B2 失效
公开(公告)号：JP2577046B2
公开(公告)日：1997-01-29
申请号：JP13156488
申请日：1988-05-31
申请人： HITACHI LTD
发明人： IIDA MAKOTO , WARATANI KENICHI , GOTO MASAO , MASUDA MASAMI , KUBOTA EIICHI
IPC分类号： F02M51/08 , F02M61/18

9. 发明专利

JPH01300055A FUEL INJECTION VALVE 失效
公开(公告)号：JPH01300055A
公开(公告)日：1989-12-04
申请号：JP12971388
申请日：1988-05-27
申请人： HITACHI LTD
发明人： KUBOTA EIICHI , MIYASHITA SUEKICHI
IPC分类号： F02M51/06 , F02M51/08 , F02M61/18
摘要： PURPOSE:To measure fuel uniformly with the dia. on the flow out side so as to secure the desired injection amount correctly by forming the injection hole of fuel to be a conical tapered hole whose fuel flow out side dia. is smaller than that of fuel flow in side. CONSTITUTION:A fuel injection valve is constituted such that a valve body 5 provided at a movable core 3 is moved when an electromagnet 4 added to a stationary core 2 is excited while stored inside of a main body 1, and fuel is injected from an injection hole 7 bored at a valve seat forming body 6. In this case, the hole 7 is formed to be a conical tapered (Di-Do)/L hole whose fuel flow out side dia. Do is smaller than that Di of fuel flow in side. The taper is set such that the dia. Do is smaller than the dia. of most shrinking part of fuel flowing inside the hole 7 and the ratio is 1/50. It is thus possible to uniformly measure the injection amount with the dia. Do on the fuel flow side of hole 7.

10. 发明专利

JP2006057641A Electromagnetic fuel injection valve 有权
标题翻译：电磁燃油喷射阀
公开(公告)号：JP2006057641A
公开(公告)日：2006-03-02
申请号：JP2005329324
申请日：2005-11-14
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： OGURA KIYOTAKA , SEKINE ATSUSHI , KUBOTA EIICHI , NAKANO MASABUMI , URASHIRO KEIICHI , MAEKAWA NORIYUKI , YOKOYAMA MIZUHO , TANABE YOSHIYUKI , KUBO HIROMASA , ISHIKAWA TORU
IPC分类号： F02M51/06 , F02M61/16 , F02M61/18
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection valve capable of reducing cost, improving centering precision (concentricity precision), and facilitating assembly of the fuel injection valve, simplifying parts, improving degree of freedom of mounting property, and preventing secondary injection. SOLUTION: A fuel swivel piece positioned on the upstream side of an injection hole is arranged on a tip side of a nozzle body of the fuel injection valve, and a fixed core and the nozzle body are mutually connected by a non-magnetic cylindrical seal ring press-fitted and welded in the outer periphery of one end of the fixed core and the inner periphery of one end of the nozzle body. The inner periphery of the fuel swivel piece and the inner periphery of the seal ring become guides for sliding and guiding stroke operation of a needle with a valve element. The fuel swivel piece is nipped and held between a receiving face on a nozzle body side and an orifice plate, and an annular fuel passage is formed between the outer periphery of the fuel swivel piece and the inner periphery of the nozzle body so that fuel flows into a passage channel provided on a lower end face of the fuel swivel piece through the annular fuel passage. A mass body movable in the axial direction independently from the needle is interposed between a return spring and the needle, and a plate spring is provided between the mass body and the needle. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够降低成本，提高定心精度（同心度精度）并且便于燃料喷射阀的组装，简化部件，提高安装性能的自由度以及防止二次侧的燃料喷射阀注射。解决方案：位于喷射孔上游侧的燃料旋转件布置在燃料喷射阀的喷嘴体的末端侧，并且固定芯和喷嘴体通过非磁性相互连接圆柱形密封环压配合并焊接在固定芯的一端的外周和喷嘴体的一端的内周。燃料旋转件的内周和密封环的内周成为用于滑动并引导具有阀元件的针的行程操作的引导件。燃料旋转件被夹持并保持在喷嘴主体侧的接收面和孔板之间，并且在燃料旋转件的外周和喷嘴体的内周之间形成环形燃料通道，使得燃料流动进入通过环形燃料通道设置在燃料旋转件的下端面上的通道。独立于针可沿轴向移动的质量体置于复位弹簧和针之间，并且在弹簧体和针之间设有板簧。版权所有（C）2006，JPO＆NCIPI

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