JP3167321B2 - Electromagnetically operable fuel injection valve - Google Patents

Electromagnetically operable fuel injection valve

Info

Publication number
JP3167321B2
JP3167321B2 JP51354290A JP51354290A JP3167321B2 JP 3167321 B2 JP3167321 B2 JP 3167321B2 JP 51354290 A JP51354290 A JP 51354290A JP 51354290 A JP51354290 A JP 51354290A JP 3167321 B2 JP3167321 B2 JP 3167321B2
Authority
JP
Japan
Prior art keywords
valve seat
valve
guide cylinder
fuel injection
closing 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.)
Expired - Fee Related
Application number
JP51354290A
Other languages
Japanese (ja)
Other versions
JPH04503097A (en
Inventor
グライナー，マックス
ロマン，ペーター
ライター，フェルディナント
バビッツカ，ルードルフ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of JPH04503097A publication Critical patent/JPH04503097A/en
Application granted granted Critical
Publication of JP3167321B2 publication Critical patent/JP3167321B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal

Description

【発明の詳細な説明】 背景技術 本発明は請求項１の上位概念に記載された燃料噴射弁
に関する。Description: BACKGROUND OF THE INVENTION The invention relates to a fuel injector according to the preamble of claim 1.

ドイツ連邦共和国特許第3102642号明細書により、こ
のような形式の燃料噴射弁はすでに公知である。このよ
うな形式の燃料噴射弁では、一方ではガイドシリンダと
弁座とを備えたガイドリングが、他方では燃料噴射のた
めの流出開口を備えた、ノズルと呼ばれる部分とが、そ
れぞれ別々の部分である。ガイドリングはプレスばめで
ノズル内に保持されている。これは個々の部分の高い寸
法精度と、燃料噴射弁のための高い組み立てコストとを
必要とする。個々の部分の寸法許容誤差を少しでも越え
ると、燃料噴射弁組み立ての際に、弁座の変形が生じ、
さらに弁座と流出開口とに対するガイドシリンダの不良
な同心が生じる。このことは不均等な燃料噴射形成を増
大させる結果となる。A fuel injector of this type is already known from DE 310 26 42 A1. In a fuel injection valve of this type, a guide ring with a guide cylinder and a valve seat on the one hand and a part called a nozzle with an outlet opening for fuel injection on the other hand are separate parts. is there. The guide ring is held in the nozzle by a press fit. This requires high dimensional accuracy of the individual parts and high assembly costs for the fuel injector. If the dimensional tolerance of each part is slightly exceeded, the valve seat will be deformed during the assembly of the fuel injection valve,
Furthermore, poor concentricity of the guide cylinder with respect to the valve seat and the outflow opening occurs. This results in increased uneven fuel injection formation.

発明の利点 請求項１に記載された特徴を有する本発明による燃料
噴射弁には、これに対して以下のような利点がある。す
なわち、組み立てコストが低下し、かつガイドシリンダ
と弁座と噴射開口とが弁座体の軸線に対して精密に整合
する。この高い精度は狭い許容誤差範囲内で可能であ
る。常に正確な燃料噴射時点における燃料噴射弁の一定
で正確な応答が得られ、また燃料噴射流形成が改良され
て燃料の精密な調量が得られる。Advantages of the invention The fuel injection valve according to the invention having the features described in claim 1 has the following advantages over this. That is, the assembly cost is reduced, and the guide cylinder, the valve seat, and the injection opening are precisely aligned with the axis of the valve seat body. This high accuracy is possible within a narrow tolerance range. A constant and accurate response of the fuel injector is always obtained at the exact time of the fuel injection, and the fuel injection flow formation is improved so that a precise metering of the fuel is obtained.

ガイドシリンダ及び／または弁座及び／またはらせん
溝が、圧力をかけてプレス工具、例えばポンチの形を被
加工材料に圧刻するいわゆるプレス成形加工により構成
されていることによって、そのプレス成形加工された構
成部分の、安価で、高精度きわめて簡単で、削りかすの
出ない製作が可能である。The guide cylinder and / or the valve seat and / or the helical groove are formed by so-called press forming, in which the shape of a press tool, for example a punch, is stamped into the workpiece by applying pressure. Inexpensive, high-precision, extremely simple, and swarf-free production of the components that are used.

図面 以下に本発明の一実施例を図面につき詳しく説明す
る。第１図は燃料噴射弁の弁座範囲の断面図であり、第
２図は燃料噴射弁の弁座体の詳細を示す図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a sectional view of a valve seat area of a fuel injection valve, and FIG. 2 is a view showing details of a valve seat body of the fuel injection valve.

実施例の説明 混合圧縮火花点火式内燃機関の燃料噴射装置のため
に、図１に示された燃料噴射弁１は、貫通開口４を備え
た弁ケーシング３を有しており、貫通開口４内に弁座本
体５が溶接結合部６を用いて、固定されている。弁座本
体５には中央部に孔状のガイドシリンダ７が設けられて
いる。弁座体５は、さらにガイドシリンダの上流側で弁
座８と、それに続いて内燃機関の吸込み管内に燃料を噴
射するための少なくとも１つの流出開口９とを有してい
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS For a fuel injection device for a mixed compression spark ignition type internal combustion engine, the fuel injection valve 1 shown in FIG. 1 has a valve casing 3 with a through-opening 4. , A valve seat body 5 is fixed using a welded joint 6. The valve seat body 5 is provided with a hole-shaped guide cylinder 7 at the center. The valve seat 5 further has a valve seat 8 upstream of the guide cylinder and subsequently at least one outlet opening 9 for injecting fuel into the suction pipe of the internal combustion engine.

貫通開口４を通って、半径方向の開口11を備えた弁閉
鎖部材10が突入している。弁座８に向けられた側で弁閉
鎖部材10は、例えば硬質の球の形状の弁閉鎖体12を支持
している。弁座８とは反対の側で弁閉鎖部材10は、弱磁
性の材料から成る可動子15を支持している。弁閉鎖体12
は少ない遊びでガイドシリンダ７内に突入しており、燃
料噴射弁１を閉鎖した状態で弁座８に接触している。ガ
イドシリンダ７の壁には弁閉鎖部材10の軸線に対して斜
めに延びている複数のらせん溝（Drallnuten）16が設け
られている。ガイドシリンダ７と弁座８との間には溝22
が環状に延びていて、弁座８へのらせん溝16の移行部を
中断している。Through the through-opening 4 a valve closing member 10 with a radial opening 11 protrudes. On the side facing the valve seat 8, the valve closing member 10 supports a valve closing body 12, for example in the form of a hard sphere. On the side opposite to the valve seat 8, the valve closing member 10 supports a mover 15 made of a weak magnetic material. Valve closure 12
Is protruding into the guide cylinder 7 with little play, and is in contact with the valve seat 8 with the fuel injection valve 1 closed. The wall of the guide cylinder 7 is provided with a plurality of spiral grooves 16 extending obliquely to the axis of the valve closing member 10. A groove 22 is provided between the guide cylinder 7 and the valve seat 8.
Extend annularly, interrupting the transition of the spiral groove 16 to the valve seat 8.

閉鎖方向で圧縮ばね17は弁閉鎖部材10に当て付けられ
ている。電磁コイル18は、この電磁コイルが励磁される
と直ちに可動子15を閉鎖方向とは逆方向に持ち上げるよ
うに、可動子15に隣接して配置されている。In the closing direction, the compression spring 17 is applied to the valve closing member 10. The electromagnetic coil 18 is arranged adjacent to the movable element 15 so that the movable element 15 is lifted in a direction opposite to the closing direction as soon as the electromagnetic coil is excited.

図２に示された弁座体５は、この弁座体５の軸線に対
して斜めに延びているらせん溝16を明示している。ま
た、弁座８と少なくとも１つの流出開口９とが明示され
ている。弁座体５のこのような構成においては、ガイド
シリンダ７を特に精密に加工する必要がある。なぜなら
ば、開閉時に弁閉鎖部材が弁座８から迅速に持ち上げら
れるかまたは弁座８を迅速にシールするために、ガイド
シリンダ７に対して弁座８が同心的でなければならない
からである。弁閉鎖部材10と弁座８との間の摩擦経路は
それによりできるだけ短く維持される。弁座体５の外周
面20はガイドシリンダ７に対してやや偏心していてよ
い。なぜなら、このことが弁閉鎖部材の長さ及び弁閉鎖
体12の球形によって不都合な影響を受けないからであ
る。The valve seat 5 shown in FIG. 2 clearly shows a spiral groove 16 extending obliquely to the axis of the valve seat 5. Also, a valve seat 8 and at least one outflow opening 9 are shown. In such a configuration of the valve seat 5, the guide cylinder 7 needs to be particularly precisely machined. This is because the valve seat 8 must be concentric with respect to the guide cylinder 7 in order to quickly lift the valve closing member from the valve seat 8 or to quickly seal the valve seat 8 when opening and closing. The friction path between the valve closing member 10 and the valve seat 8 is thereby kept as short as possible. The outer peripheral surface 20 of the valve seat 5 may be slightly eccentric with respect to the guide cylinder 7. This is because this is not adversely affected by the length of the valve closing member and the spherical shape of the valve closing body 12.

燃料噴射弁１を開くために、電磁コイル18の図示され
ていない回路が閉じられる。その結果有効な電磁力が可
動子15を引き寄せる。この可動子と一緒に弁閉鎖部材10
の弁閉鎖体12が、負荷している圧縮ばね17に逆らって弁
座８から離れる方向に移動され、この結果燃料が、弁閉
鎖部材10とこの弁閉鎖部材の半径方向の開口11を通って
らせん溝16を介して弁座８へ達し、また、少なくとも１
つの流出開口９の上流側へ達し、噴射され得る。ガイド
シリンダ７と弁座８との間の環状の溝22は一様な燃料の
分配を可能にし、これにより燃料の気化が付加的に改良
される。In order to open the fuel injection valve 1, the circuit not shown of the electromagnetic coil 18 is closed. As a result, the effective electromagnetic force draws the mover 15. Valve closing member 10 with this mover
Of the valve closing body 12 is moved away from the valve seat 8 against the loading compression spring 17 so that fuel passes through the valve closing member 10 and the radial opening 11 of the valve closing member. It reaches the valve seat 8 via the spiral groove 16 and has at least one
It reaches upstream of the two outlet openings 9 and can be injected. The annular groove 22 between the guide cylinder 7 and the valve seat 8 allows a uniform distribution of the fuel, whereby the vaporization of the fuel is additionally improved.

ガイドシリンダ７及び／または弁座８及び／または弁
座本体５のガイドシリンダ７に形成されたらせん溝16の
最終的な形状は、プレス成形加工により特に安価にかつ
高精度に製作可能である。この際適当に構成されたプレ
ス成形工具を用いて公知の方法でプレス成形加工が行な
われる。The final shape of the spiral groove 16 formed in the guide cylinder 7 and / or the valve seat 8 and / or the guide cylinder 7 of the valve seat body 5 can be manufactured particularly inexpensively and accurately by press molding. At this time, press forming is performed by a known method using an appropriately configured press forming tool.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 ロマン，ペーター ドイツ連邦共和国 Ｄ―7000 シュツッ トガルト 30 メルツェンシュトラーセ 37 (72)発明者 ライター，フェルディナント ドイツ連邦共和国 Ｄ―7145 マルクグ レーニンゲン ブルクヴェーク １ (72)発明者 バビッツカ，ルードルフ ドイツ連邦共和国 Ｄ―7141 キルヒベ ルク― ノイホーフ ビルケンヴェーク （番地なし) (56)参考文献 特開 昭63−227952（ＪＰ，Ａ) 特開 昭60−252878（ＪＰ，Ａ) 特開 昭60−60264（ＪＰ，Ａ) 特開 昭59−70871（ＪＰ，Ａ) 特開 昭55−104564（ＪＰ，Ａ) 実開 昭62−156156（ＪＰ，Ｕ) 実開 昭59−73575（ＪＰ，Ｕ) ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Roman, Peter Germany D-7000 Stuttgart 30 Merzenstrasse 37 (72) Inventor Reiter, Ferdinand Germany D-7145 Markug Leningen Burgweg 1 (72) Invention Babitzka, Ludorf Germany D-7141 Kirchberg-Neuhof Birkenweg (No address) (56) References JP-A-63-227952 (JP, A) JP-A-60-252878 (JP, A) 60-60264 (JP, A) JP-A-59-70871 (JP, A) JP-A-55-104564 (JP, A) Fully open Showa 62-156156 (JP, U) Really open show 59-73575 (JP, A) , U)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】弁ケーシング（３）と、ガイドシリンダ
（７）が設けられた弁座体（５）とを備えた電磁的に操
作可能な燃料噴射弁（１）であって、ガイドシリンダ
（７）内に球形の弁閉鎖体（12）を支持した弁閉鎖部材
（10）が突入しており、該弁閉鎖体の周囲でらせん溝
（16）を通って燃料が流通可能であり、前記弁閉鎖部材
（10）が、同様に弁座体（５）内に設けられた弁座
（８）上に載るかまたは該弁座（８）から持ち上げられ
ることにより、少なくとも１つの流出開口（９）への燃
料流を解放するかまたは中断する形式のものにおいて、
前記弁座体（５）がガイドシリンダ（７）及び弁座
（８）以外に少なくとも１つの流出開口（９）をも有し
ており、ガイドシリンダ（７）と弁座（８）との間の弁
座体（５）に環状の溝（22）が設けられており、環状の
溝（22）に複数のらせん溝（16）が接続されており、弁
ケーシング（３）が弁座体（５）を溶接結合によって支
持しており、かつガイドシリンダ（７）及び／または弁
座（８）及び／またはらせん溝（16）が弁座体（５）に
プレス成形加工によって製作されており、ガイドシリン
ダ（７）の壁にらせん溝（16）が設けられていることを
特徴とする電磁的に操作可能な燃料噴射弁。1. An electromagnetically operable fuel injection valve (1) comprising a valve casing (3) and a valve seat (5) provided with a guide cylinder (7), comprising: a guide cylinder (3). A valve closing member (10) supporting a spherical valve closing body (12) protrudes into 7), and fuel can flow through a spiral groove (16) around the valve closing body. The valve closing member (10) rests on or is lifted from a valve seat (8), which is likewise provided in the valve seat (5), so that at least one outlet opening (9) is provided. ) To release or interrupt the fuel flow to
The valve seat (5) also has at least one outflow opening (9) in addition to the guide cylinder (7) and the valve seat (8), so that there is a gap between the guide cylinder (7) and the valve seat (8). An annular groove (22) is provided in the valve seat body (5), a plurality of spiral grooves (16) are connected to the annular groove (22), and the valve casing (3) is provided in the valve seat body (5). 5) is supported by a welded joint, and the guide cylinder (7) and / or the valve seat (8) and / or the helical groove (16) are manufactured by press forming on the valve seat body (5); An electromagnetically operable fuel injection valve characterized in that a spiral groove (16) is provided in a wall of a guide cylinder (7).
JP51354290A 1989-11-25 1990-10-12 Electromagnetically operable fuel injection valve Expired - Fee Related JP3167321B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3939093A DE3939093A1 (en) 1989-11-25 1989-11-25 ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE
DE3939093.4 1989-11-25

Publications (2)

Publication Number Publication Date
JPH04503097A JPH04503097A (en) 1992-06-04
JP3167321B2 true JP3167321B2 (en) 2001-05-21

Family

ID=6394224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51354290A Expired - Fee Related JP3167321B2 (en) 1989-11-25 1990-10-12 Electromagnetically operable fuel injection valve

Country Status (10)

Country Link
EP (1) EP0455758B1 (en)
JP (1) JP3167321B2 (en)
KR (1) KR0172131B1 (en)
AU (1) AU635785B2 (en)
BR (1) BR9007081A (en)
CZ (1) CZ279368B6 (en)
DE (2) DE3939093A1 (en)
ES (1) ES2050457T3 (en)
HU (1) HU209966B (en)
WO (1) WO1991008392A1 (en)

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KR930004967B1 (en) * 1988-07-13 1993-06-11 가부시기가이샤 히다찌세이사꾸쇼 Electronic fuel injector
DE3831196A1 (en) * 1988-09-14 1990-03-22 Bosch Gmbh Robert ELECTROMAGNETICALLY ACTUABLE VALVE
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Publication number Publication date
EP0455758B1 (en) 1994-02-16
KR0172131B1 (en) 1999-03-20
CZ583590A3 (en) 1993-06-16
HUT59739A (en) 1992-06-29
AU635785B2 (en) 1993-04-01
ES2050457T3 (en) 1994-05-16
CZ279368B6 (en) 1995-04-12
WO1991008392A1 (en) 1991-06-13
BR9007081A (en) 1991-11-26
EP0455758A1 (en) 1991-11-13
DE59004626D1 (en) 1994-03-24
JPH04503097A (en) 1992-06-04
KR920701659A (en) 1992-08-12
AU6515190A (en) 1991-06-26
HU907635D0 (en) 1991-06-28
HU209966B (en) 1995-01-30
DE3939093A1 (en) 1991-05-29

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