JPH01354A - Surface processing method for a guide portion of a fuel valve nozzle of an internal combustion engine and a needle valve of the fuel valve nozzle - Google Patents
Surface processing method for a guide portion of a fuel valve nozzle of an internal combustion engine and a needle valve of the fuel valve nozzleInfo
- Publication number
- JPH01354A JPH01354A JP62-151433A JP15143387A JPH01354A JP H01354 A JPH01354 A JP H01354A JP 15143387 A JP15143387 A JP 15143387A JP H01354 A JPH01354 A JP H01354A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- guide portion
- needle valve
- valve
- nozzle
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims description 27
- 238000002485 combustion reaction Methods 0.000 title claims description 7
- 238000003672 processing method Methods 0.000 title claims description 5
- 230000003746 surface roughness Effects 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はディーゼル機関等の内燃機関において使用され
ている燃料噴射装置の燃料弁ノズルに係り、特に弁本体
のガイド孔と慴接するニードルバルブのガイド部表面を
梨地状に加工した燃料弁ノズルと、その加工方法に関す
るものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a fuel valve nozzle of a fuel injection device used in an internal combustion engine such as a diesel engine, and in particular to a needle valve nozzle that is in close contact with a guide hole of a valve body. The present invention relates to a fuel valve nozzle in which the surface of the guide portion is processed into a matte finish, and a method for processing the same.
ディーゼル機関等の内燃機関においては、例えば第３図
に示すような多孔式燃料弁ノズルが用いられている。弁
本体１には、後述するニードルバルブ２のガイド部３を
案内するガイド孔４が形成されている。ガイド孔４には
油溜め５か連続して形成されている。そしてこの油溜め
５には、テーバ状に形成されたサックホール６の入口が
連通している。モして略゛ト球状の外形を有する弁本体
１の先端部には、該サックホール６と外部を連通ずる噴
孔７が複数本形成されている。また弁本体１には、図示
しないポンプから前記油溜め５に燃料を供給するための
縦孔８か形成されている。次に、前記弁本体１にはニー
ドルバルブ２が設けられている。即ちニードルバルブ２
のガイド部３はに形成された先端部をサックホール６の
入口に密着させることによって、サックホール６を油溜
め５に対して遮断できるように構成されている。以トの
ような構成において、図示しないポンプから圧送されて
きた燃料は縦孔８を通って油溜め５に貸り、そのｌ下方
によってニードルバルブ２はガイド部３をガイド孔４に
案内されてリフトする。この時、燃料がサックホール６
内に流れ込み、該燃料は各噴孔７より外部へ向けて噴射
される“ことになる。In internal combustion engines such as diesel engines, for example, a multi-hole fuel valve nozzle as shown in FIG. 3 is used. A guide hole 4 for guiding a guide portion 3 of a needle valve 2, which will be described later, is formed in the valve body 1. An oil reservoir 5 is continuously formed in the guide hole 4. The oil reservoir 5 is communicated with the entrance of a suck hole 6 formed in a tapered shape. A plurality of nozzle holes 7 are formed at the tip of the valve body 1, which has a substantially spherical outer shape, to communicate with the suck hole 6 and the outside. Further, the valve body 1 is formed with a vertical hole 8 for supplying fuel to the oil reservoir 5 from a pump (not shown). Next, the valve body 1 is provided with a needle valve 2 . That is, needle valve 2
The guide portion 3 is configured such that the suck hole 6 can be blocked off from the oil reservoir 5 by bringing the tip formed therein into close contact with the entrance of the suck hole 6. In the configuration described below, fuel pumped under pressure from a pump (not shown) passes through the vertical hole 8 and is lent to the oil reservoir 5, and the needle valve 2 is guided through the guide portion 3 into the guide hole 4 by the downward direction of the vertical hole 8. Lift. At this time, the fuel is suckhole 6
The fuel is injected outward from each nozzle hole 7.
（発明が解決しようとする問題点）
弁本体ｌのガイド孔４と摺動関係にあるニードルバルブ
２のガイド部３は、従来は鏡面に近いような凹凸の少い
状態となるようにその表面を仕Ｉ：げられており、例え
ば第２図に示すように、その表面粗度Ｒｍａｘは０．ｌ
５−０．２５５度とされていた。このため、凹凸の少い
表面には油か保持されにくく、また油中に含まれる異物
の埋没しつる隙間がないので、油切れ・発熱によるステ
ィック現象や、油中の異物やガイド孔とのカジリによる
スティックか摺動面に発生することがあった。(Problems to be Solved by the Invention) Conventionally, the guide portion 3 of the needle valve 2, which is in a sliding relationship with the guide hole 4 of the valve body 1, has a surface that is close to a mirror surface with few irregularities. For example, as shown in FIG. 2, the surface roughness Rmax is 0. l
It was supposed to be 5-0.255 degrees. For this reason, it is difficult for oil to be retained on a surface with few irregularities, and there is no gap for foreign matter contained in the oil to be buried, so there is a problem of stickiness caused by running out of oil or heat generation, and foreign matter in the oil or contact with the guide hole. There were cases where sticking caused by galling occurred on the sliding surface.
特に最近、ディーゼル機関川燃料弁ノズルは、高圧短期
噴射・、；゛６出力化のために使用条件か過酷化してお
り、あるいは粗悪な低質油を燃料として使用するように
なったため、燃料油中の介在物が増加するなど、一般に
使用条件は厳しくなる 方である。従ってこれに伴い、
前記ニードルバルブ２のガイド部３においても、＋）ｉ
’ｒ述したような不、！Ｌ合が多く発生するようになっ
てきた。Especially recently, diesel engine fuel valve nozzles have become more difficult to use due to high-pressure short-term injection and six-output output, or poor-quality low-quality oil has been used as fuel. In general, the usage conditions will become more severe, such as an increase in the number of inclusions. Therefore, along with this,
Also in the guide portion 3 of the needle valve 2, +)i
'r not as mentioned! L-coupling has started to occur more frequently.
本、発明者の知見によれば、前記ガイド部３の鏡面に近
い什トげは、摺動面のシール性向りを目的としたもので
はなく、所定精度の形状・寸法を１ニーようとした結果
であり、前記摺動面のシール性を損わない程度に、ガイ
ド部の表面は粗く仕上げることができると考えられる。According to the findings of the inventor of the present invention, the near-mirror finish of the guide portion 3 is not intended to improve the sealing properties of the sliding surface, but to achieve a shape and dimension with a predetermined accuracy. As a result, it is considered that the surface of the guide portion can be roughened to the extent that the sealing performance of the sliding surface is not impaired.
そこで本発明においては、スティックが発生せず、同時
に摺動面のシール性も十分であるように、ガイド部の表
面を適正な面粗度に設定することを目的とした。Therefore, an object of the present invention is to set the surface of the guide portion to an appropriate surface roughness so that sticking does not occur and at the same time the sealing performance of the sliding surface is sufficient.
本発明の燃料弁ノズルは、弁本体のガイド孔がニードル
バルブのガイド部を摺動自在に案内し、噴孔が形成され
た弁本体のサックホールの入口を前゛記ニードルバルブ
のシート部が開閉することによって燃料の噴射を制御す
る内燃機関の燃料弁ノズルにおいて、前記ニードルバル
ブのガイド部の表面を面粗度ＲＩＩＩａｘ ０．４Ｓ〜
０．６Ｓの状態に形成したことを特徴としており、本発
明に係るニードルバルブの表面加工方法は、ガイド部の
表面加工工程中に、ガイド部の表面を面粗度Ｒｍａｘ０
．４Ｓ〜０．６５の梨ｆ地状に加工する工程を含めるよ
うにしたことを特徴としている。In the fuel valve nozzle of the present invention, the guide hole of the valve body slidably guides the guide part of the needle valve, and the seat part of the needle valve guides the entrance of the suck hole of the valve body in which the injection hole is formed. In a fuel valve nozzle for an internal combustion engine that controls fuel injection by opening and closing, the surface of the guide portion of the needle valve has a surface roughness of RIIIax 0.4S ~
The needle valve surface processing method according to the present invention is characterized in that the surface of the guide part is formed in a surface roughness Rmax0 during the surface processing process of the guide part.
．． It is characterized in that it includes a step of processing it into a matte texture of 4S to 0.65.
ガイド部の表面を面粗度Ｒｍａｘ０．４Ｓ〜０．６Ｓの
梨ｒ−地状に加工しておけば、表面の四部には油焼けに
よるスティックを防止しつるだけの燃料油が溜められ、
また燃料油中の異物はこの凹部内に埋没するので異物介
在によるスティックも発生しない。また前記のような面
粗度てあれば、ブを本体のガイド孔とのシール性も確保
され、摺動面から外部に洩れる燃料油の晴は従来とかわ
らない。If the surface of the guide part is processed into a pear-like surface with a surface roughness Rmax of 0.4S to 0.6S, enough fuel oil can be stored in the four parts of the surface to prevent stickiness due to oil burn.
In addition, since the foreign matter in the fuel oil is buried in this recess, no stickiness occurs due to the presence of foreign matter. In addition, if the surface roughness is as described above, the sealing performance between the guide hole of the main body and the guide hole of the main body is ensured, and the leakage of fuel oil to the outside from the sliding surface is not different from the conventional one.
（実施例〕
本発明の−・実施例に係る燃料弁ノズルの形状・構造は
第３図に−＝−例として示した従来品とほぼ同じである
。そこで本項では、燃料弁ノズルの構造の説明は省略し
、前記燃料弁ノズルにおけるニードルバルブのガイド部
の表面加工方法を中心に説明する。(Embodiment) The shape and structure of the fuel valve nozzle according to the embodiment of the present invention are almost the same as the conventional product shown as an example in FIG. A description thereof will be omitted, and the description will focus on the surface processing method of the guide portion of the needle valve in the fuel valve nozzle.
まず、旋盤によってガイド部３の表面を仕上げてから、
熱処理を行なう。次にセンタレス研削機を用いて表面を
研磨し、さらに２工程よりなるラップ仕上げを行なう。First, the surface of the guide part 3 is finished using a lathe, and then
Perform heat treatment. Next, the surface is polished using a centerless grinder, and then a lapping process is performed, which consists of two steps.
第１ラツプ工程では、研磨材として例えばカーボランダ
ム＄２０００を用い、表面を荒仕上げする。そして最終
工程としての第２ラツプ下程では、研磨材として例えば
カーボランダム＃８００を用い、ラッピングの圧力と速
度を適宜に設定して最終仕上げを行なう。第１図に示す
ように、この第２ラツプ工程によれば、ガイド部の表面
は面粗度がＲｍａｘＯ，４Ｓ〜０．６Ｓとなり、梨了−
地状に仕上げられる。なお、このように仕上げられたニ
ードルバルブ２と組合される弁本体１は、従来と同様に
、ガイド孔４の内面を鏡面に近い状態に仕上げておく。In the first lapping step, the surface is rough-finished using, for example, carborundum $2000 as an abrasive. In the lower stage of the second lapping, which is the final step, a final finish is performed by using, for example, Carborundum #800 as the abrasive and setting the lapping pressure and speed appropriately. As shown in FIG. 1, according to this second lapping process, the surface roughness of the guide portion is RmaxO, 4S to 0.6S, and the surface roughness is RmaxO, 4S to 0.6S.
It is finished to the ground. The valve body 1 to be combined with the needle valve 2 finished in this manner has the inner surface of the guide hole 4 finished in a state close to a mirror surface, as in the conventional case.
ニードルバルブ２のガイド部３の表面を面粗度Ｒｍａｘ
０．４Ｓ〜０．６Ｓに加工しておけば、弁本体１のガ
イド孔４と摺接するガイド部３にはカジリが発生せず、
油中の異物はガイド部３の表面の凹部内に埋没し、ざら
に該凹部内には適度な量の油が保持される。従ってガイ
ド部３には、過酷な使用条件下においてさえも不都合な
スティック現象が発生することはない。またガイド部３
の表面状態を過度に粗くすると、ガイド部３とガイド孔
４との隙間から洩れる燃料の寸が増加してしまうが、Ｒ
ｍａｘ ０．４Ｓ〜０．６Ｓの範囲であれば摺動面のシ
ール性は確保され、洩れが増加することはない。The surface roughness of the guide portion 3 of the needle valve 2 is Rmax.
If processed to 0.4S to 0.6S, galling will not occur in the guide part 3 that makes sliding contact with the guide hole 4 of the valve body 1.
Foreign matters in the oil are buried in the recesses on the surface of the guide portion 3, and roughly an appropriate amount of oil is retained within the recesses. Therefore, the guide portion 3 does not suffer from any undesirable sticking phenomenon even under severe usage conditions. Also, the guide part 3
If the surface condition of
If the max is in the range of 0.4S to 0.6S, the sealing performance of the sliding surface is ensured and leakage does not increase.
スティックを防止すると共に摺動部のシール性も確保で
きるガイド部表面における前記面粗度Ｒｗａｘの適正値
は、本発明者が実験的に確認したものである。表面粗度
ＲｆｌＩａｘをこの適正値の範囲内に仕上げるためには
、萌述した研磨材を使用してもよいし、ラッピングの圧
力・速度等の加１条件な；ｊＡ整することによって他の
研磨材を用いてもよい。The appropriate value of the surface roughness Rwax on the surface of the guide portion, which can prevent stickiness and ensure the sealing performance of the sliding portion, was experimentally confirmed by the present inventor. In order to finish the surface roughness RflIax within this appropriate value range, the abrasive material described above may be used, or other polishing methods may be applied by adjusting the lapping pressure, speed, etc. Materials may also be used.
本発明によれば、ニードルバルブのガイド部の表面が面
粗度Ｒａ＋ａｘ ０．４Ｓ〜０．６Ｓの状態とされてい
るので、燃料弁ノズルの摺動部におけるスティック現象
を確実に防止することができるという効果がある。According to the present invention, since the surface of the guide portion of the needle valve has a surface roughness Ra+ax of 0.4S to 0.6S, it is possible to reliably prevent the sticking phenomenon in the sliding portion of the fuel valve nozzle. There is an effect that it can be done.
第１図は、本発明の一実施例である燃料弁ノズルにおい
て、ニードルバルブのガイド部の表面状態を示す表面粗
さ曲線、第２図は従来の燃料弁ノズルにおいて、ニード
ルバルブのガイド部の表面状態を示す表面粗さ曲線、第
３図は内燃機関において使用される燃料弁ノズルの一般
的な構造を一例として示す断面図である。
１・−・弁本体、 ２−・・ニードルバルブ。
３・・・ガイド部、 ４・−ガイド孔。
６・・・サックホール、７−・・噴孔。
９・・・シート部。
特許出願人 株式会社新潟鉄工所
代理人・弁理士 西 村 教 光第１図
第３図
手 続 補 正 書
１６“’６４２．７す２１日Fig. 1 shows a surface roughness curve showing the surface condition of the guide part of the needle valve in a fuel valve nozzle which is an embodiment of the present invention, and Fig. 2 shows the surface roughness curve of the guide part of the needle valve in a conventional fuel valve nozzle. A surface roughness curve showing the surface condition. FIG. 3 is a sectional view showing, as an example, a general structure of a fuel valve nozzle used in an internal combustion engine. 1.--Valve body, 2-..Needle valve. 3...Guide portion, 4.-Guide hole. 6...Suck hole, 7-...Blow hole. 9... Seat part. Patent Applicant Niigata Iron Works Co., Ltd. Agent/Patent Attorney Norimitsu Nishimura Figure 1 Figure 3 Procedures Amendment 16 “July 21, ’642
Claims (2)
摺動自在に案内し、噴孔が形成された弁本体のサックホ
ールの入口を前記ニードルバルブのシート部が開閉する
ことによって燃料の噴射を制御する内燃機関の燃料弁ノ
ズルにおいて、前記ニードルバルブのガイド部の表面を
面粗度Ｒｍａｘ０．４Ｓ〜０．６Ｓの状態に形成したこ
とを特徴とする内燃機関の燃料弁ノズル。(1) The guide hole of the valve body slidably guides the guide part of the needle valve, and the seat part of the needle valve opens and closes the entrance of the suck hole of the valve body in which the injection hole is formed, thereby injecting fuel. 1. A fuel valve nozzle for an internal combustion engine for controlling a fuel valve nozzle for an internal combustion engine, characterized in that a surface of a guide portion of the needle valve is formed to have a surface roughness Rmax of 0.4S to 0.6S.
摺動自在に案内し、噴孔が形成された弁本体のサックホ
ールの入口を前記ニードルバルブのシート部が開閉する
ことによって燃料の噴射を制御する燃料弁ノズルのニー
ドルバルブにおけるガイド部の表面加工方法において、
ガイド部の表面加工工程中に、ガイド部の表面を面粗度
Ｒｍａｘ０．４Ｓ〜０．６Ｓの梨子地状に加工する工程
を含むことを特徴とする燃料弁ノズルのニードルバルブ
におけるガイド部の表面加工方法。(2) The guide hole of the valve body slidably guides the guide part of the needle valve, and the seat part of the needle valve opens and closes the entrance of the suck hole of the valve body in which the injection hole is formed, thereby injecting fuel. In a surface processing method for a guide part in a needle valve of a fuel valve nozzle that controls
A surface of a guide portion in a needle valve of a fuel valve nozzle, characterized in that the surface processing step of the guide portion includes a step of processing the surface of the guide portion into a satin finish with a surface roughness Rmax of 0.4S to 0.6S. Processing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15143387A JPS64354A (en) | 1987-06-19 | 1987-06-19 | Surface working method for guide of fuel valve nozzle of internal combustion engine and its needle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15143387A JPS64354A (en) | 1987-06-19 | 1987-06-19 | Surface working method for guide of fuel valve nozzle of internal combustion engine and its needle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01354A true JPH01354A (en) | 1989-01-05 |
| JPS64354A JPS64354A (en) | 1989-01-05 |
Family
ID=15518508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15143387A Pending JPS64354A (en) | 1987-06-19 | 1987-06-19 | Surface working method for guide of fuel valve nozzle of internal combustion engine and its needle valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS64354A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19843344A1 (en) * | 1998-09-22 | 2000-03-23 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engine has valve member axially movably positioned in bore of valve body, which has valve sealing surface at combustion chamber-side end |
| JP2002111105A (en) * | 2000-09-27 | 2002-04-12 | Shibaura Mechatronics Corp | Laser diode module device and laser oscillator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS568853B2 (en) * | 1973-06-19 | 1981-02-26 | ||
| SE412078B (en) * | 1978-06-21 | 1980-02-18 | Svenska Traeforskningsinst | PROCEDURE FOR PREPARING A CONTINUOUS MATERIAL MATERIAL OF FIBROS PARTICLES AND DEVICE FOR IMPLEMENTATION OF THE PROCEDURE |
-
1987
- 1987-06-19 JP JP15143387A patent/JPS64354A/en active Pending
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