EP1076771B1 - Kraftstoffeinspritzventil für brennkraftmaschinen - Google Patents
Kraftstoffeinspritzventil für brennkraftmaschinen Download PDFInfo
- Publication number
- EP1076771B1 EP1076771B1 EP99932634A EP99932634A EP1076771B1 EP 1076771 B1 EP1076771 B1 EP 1076771B1 EP 99932634 A EP99932634 A EP 99932634A EP 99932634 A EP99932634 A EP 99932634A EP 1076771 B1 EP1076771 B1 EP 1076771B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- area
- bore
- guide
- piston
- fuel injection
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 23
- 238000002347 injection Methods 0.000 title claims description 12
- 239000007924 injection Substances 0.000 title claims description 12
- 238000002485 combustion reaction Methods 0.000 title description 4
- 239000007921 spray Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Images
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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
-
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
Definitions
- the invention relates to a fuel injection valve according to the preamble of claim 1.
- Such a fuel injector is from the document EP 0 363 142 A1 known.
- the nozzle body of the known fuel injection valve is the partition between the pilot hole and the fuel supply channel through the high Injection pressure extremely stressed.
- the fuel inlet channel runs from the front of the nozzle body, first essentially parallel to the guide bore, then in bend further course curved in the direction of the pressure chamber and finally to flow into the pressure room.
- the object of the invention is the compressive strength to increase the fuel injection valve.
- An advantage of the invention is the compressive strength to increase the nozzle body. Another advantage is low manufacturing costs.
- a fuel injector, especially for diesel fuel must have a high compressive strength to the high To withstand fuel pressure.
- the compressive strength is dependent of the achievable minimum wall thickness of the components of the fuel injector.
- the part of a fuel injector shown in Figure 1 has a nozzle body 300 with a rotationally symmetrical Basic form on the intermediate layer of an intermediate piece 200 by means of a sleeve-shaped union nut 600 a nozzle holder body 100 is attached.
- the nozzle body 300 is from its end face to the nozzle holder body 100 pointing end in following body sections divided: into a guide area 310, a pressure area 330, a shaft area 350 and a the nozzle body 300 final nozzle tip 370.
- the nozzle body 300 has one at its front end beginning and ending at its nozzle tip 370, central Nozzle body bore, its diameter and function with the body portions of the nozzle body 300 varies.
- a nozzle needle 500 runs in the direction of the nozzle body bore the nozzle tip 370 into a guide piston 510, a Ring shoulder 520, a shaft piston 530 and a valve tip 540 is divided.
- the guide area 310 has a central guide bore 312, which serves to guide the guide piston 510 and a bore opening on the front side of the guide region 310 314 has.
- the pressure chamber region 330 connects to the guide region 310 which has a pressure chamber 334.
- the guide bore 312 opens into the pressure chamber 334 into which the guide piston 510 is led.
- the guide piston preferably goes in the pressure chamber 334 510 into the tapered ring shoulder 520 over, which merges into the shaft piston 530.
- An inlet channel 338 is arranged on the side of the guide bore 312, which preferably opens laterally into the pressure chamber 334.
- the inlet channel 338 has at the front end of the guide area 310 an inlet opening 342 and is preferred designed as a cylindrical bore, which is advantageous is easy and precise to manufacture, e.g. by eroding or Drill.
- the axis of the inlet channel 338 preferably forms a plane with the longitudinal axis 301 of the nozzle body 300.
- the guide area 310 is preferably through a shoulder into an upper body portion 316 with an annular Face 322 and in a lower body portion 318 with an annular shoulder surface 324, the upper body portion 316 at the front end of the guide area 310 is arranged.
- the normals of the face 322 and shoulder surface 324 are preferably approximately parallel directed to the longitudinal axis 301.
- a simple manufacture is thereby advantageously possible, e.g. by turning and polishing of the areas.
- the upper body portion 316 has a smaller one Diameter on than the lower body portion 318.
- the End face 322 has the bore opening 314 that Shoulder surface 324 has the inlet opening 324.
- the shaft region 350 connects to the pressure chamber region 330 and has a shaft bore 355 that connects to the pressure chamber 334 connects and through which the shaft piston 530 runs.
- the pressure chamber 334 is preferably symmetrical in cross section handle-shaped recess formed between the guide bore 312 and the shaft bore 355. in the The area of the upper part of the handle closes the wall of the Guide bore 312 with the wall of the pressure chamber 334 a An angle that is preferably in the range of 90 °. In the area The pressure space 334 runs in the lower part of the handle conical together, the wall of the pressure chamber 334 goes down at a flat angle into the wall of the shaft area 350 about.
- the tapered nozzle tip adjoins the shaft region 350 370 to which an internal valve seat 374 for for receiving the valve tip 540.
- the nozzle tip 370 has at least one spray hole 378 through which the Fuel is injected into the combustion chamber of the internal combustion engine becomes.
- the axial movement of valve tip 540 controls the fuel flow into the combustion chamber, being at rest the valve tip 540 covers the spray holes 378 or stops the flow of fuel to the spray holes 378.
- the fuel is supplied from the inlet channel 338 in the nozzle body 300 via the pressure chamber 334, the shaft bore 355, the valve seat 374 led to the spray holes 378.
- the outside of the nozzle body 300 is preferably in height of the pressure chamber 334 and stepped at the height of the shaft region 350, wherein the diameter of the nozzle body 300 changes reduced in the direction of the nozzle tip 370.
- the intermediate piece 200 is hollow cylindrical and has a central piston bore 215 for guiding a piston 400 and one on the side, preferably approximately parallel to the piston bore 215 arranged feed channel 235.
- the intermediate piece 200 limits the stroke of the nozzle needle 500 since the piston bore 215 has a smaller diameter than the guide piston 510 of the nozzle needle 500.
- the piston 400 transmits the axial one through a control valve or an actuator-generated movement on the nozzle needle 500.
- the nozzle needle 500 exerts an axial direction on the piston 400 of the piston 400 directed force from the fuel pressure on the ring shoulder 520 and on the effective one Annular surface is generated at the valve tip 540.
- FIG. 2 shows details of the fuel injection valve from FIG 1 with the nozzle body 300 and the intermediate piece 200.
- the Inlet channel 338 is preferably a cylindrical bore trained, which are advantageously manufactured easily and accurately can.
- the area between the paragraph at the level of the print area 334 and the end face 322 of the guide area 310, is the collar area with the collar length dl and the collar diameter db at the level of the pressure chamber 334.
- the axial height difference between the face 322 and the shoulder surface 324 is the heel length la.
- the intermediate wall 346 Between the inlet channel 338 and the guide bore 312 there is an intermediate wall 346. At the mouths of the inlet channel 338 and the guide bore 312 in the pressure chamber 334 the intermediate wall 346 has a smallest wall thickness d.
- a large wall thickness d advantageously leads to a high one Compressive strength of the nozzle body 300.
- the inlet channel 338 forms an angle a with the guide bore 312.
- the Wall thickness d depends on from the angle a, from the collar diameter db, the bundle length dl and the heel length la.
- An embodiment of the nozzle body 300 from FIG. 2 has a collar diameter db of approximately 14.3 mm and a collar length dl from about 15 mm.
- the angle a in the range from 10 ° to 45 °. In a preferred one Form of training occurs for example with a paragraph length of 9 mm an angle of approx. 28 °.
- the angle is preferably a in the range of 10 ° to 45 °.
- the intermediate piece 200 is through a shoulder on its Piston bore 215 facing inside in the axial direction divided into a hollow cylindrical feed area 220 and a hollow cylindrical piston portion 240, the piston portion 240 has a smaller inner diameter than the feed area 220.
- the piston area 240 is closer to Nozzle holder body 100 located as the feed area 220.
- the feed channel 235 runs in the jacket of the feed area 220 and preferably in the jacket of the piston region 240 approximately parallel to piston bore 215.
- the shoulder of the intermediate piece 200 closes with that on the front End of the nozzle body 300 located paragraph of the guide area 310 conclusively.
- the inlet channel 338 of the nozzle body 300 connects to the feed channel 235 of the intermediate piece 200 at.
- the shoulder surface 324 of the nozzle body 300 lies flat on the end face of the adapter 200 at. Due to the strong pressing force between nozzle body 300 and adapter 200 creates a high pressure resistant connection.
- the normals are Front surface 322, the shoulder surface 324 and the front Surface of the intermediate piece 200 directed obliquely to the longitudinal axis 301.
- the compressive strength is also advantageous to increase if the edges in the area of the smallest wall thickness d additionally be rounded off, e.g. about electrochemical rounding.
- FIG 3 shows a further embodiment of the nozzle body 300 with the intermediate piece 200.
- the intermediate piece 200 as hollow cylindrical feed sleeve 230 without internal shoulder educated.
- the feed channel 235 is in the jacket Feed sleeve 230 arranged.
- the feed sleeve 230 encloses preferably entirely the upper body portion 316 of the Guide area 310.
- the one end face of the feed sleeve 230 connects to the shoulder surface 324 of the guide area 310 at.
- the feed sleeve 230 and the end face 322 adjoin the nozzle holder body 100.
- the inlet channel 338 of the nozzle body 300 connects to the feed channel 235 of the feed sleeve 230.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- Figur 1
- einen Längsschnitt durch einen Teil eines Kraftstoffeinspritzventils,
- Figur 2
- einen Längsschnitt eines ersten Ausführungsbeispiels eines Düsenkörpers und eines Zwischenstücks aus Figur 1, und
- Figur 3
- einen Längsschnitt eines zweiten Ausführungsbeispiels eines Düsenkörpers und eines Zwischenstücks.
Claims (5)
- Kraftstoffeinspritzventil mit einem Düsenkörper (300), der aufweist:dadurch gekennzeichnet, daß der Führungsbereich (310) durch einen Absatz in einen oberen Körperabschnitt (316) mit einer Stirnfläche (322) und einen unteren Körperabschnitt (318) mit einer Schulterfläche (324) abgestuft ist,einen Führungsbereich (310) an seinem stirnseitigen Ende mit einer zentralen Führungsbohrung (312), die eine Bohrungsöffnung (314) am stirnseitigen Ende des Führungsbereichs (310) hat,einen Druckraumbereich (330), der an den Führungsbereich (310) anschließt und der einen Druckraum (334) aufweist, in den die Führungsbohrung (312) mündet,einen Zulaufkanal (338), der seitlich zur Führungsbohrung (312) angeordnet ist und der in den Druckraum (334) mündet, wobei der Zulaufkanal (338) am stirnseitigen Ende des Führungsbereichs (310) eine Zulauföffnung (342) aufweist,
daß der untere Körperabschnitt (318) näher am Druckraumbereich (330) angeordnet ist als der obere Körperabschnitt (316),
daß der obere Körperabschnitt (316) einen geringeren Durchmesser als der untere Körperabschnitt (318) hat, und
daß die Zulauföffnung (342) in der Schulterfläche (324) und die Bohrungsöffnung (314) an der Stirnfläche (322) liegt. - Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der Zulaufkanal (338) des Düsenkörpers (300) als zylindrische Bohrung ausgeführt ist.
- Kraftstoffeinspritzventil nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß der Winkel (a), den der Zulaufkanal (338) mit der Führungbohrung (312) einschließt, im Bereich von 10° bis 45° liegt.
- Kraftstoffeinspritzventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet daß zwischen dem Düsenkörper (300) und einem Düsenhalterkörper (100) ein hohlzylindrisches Zwischenstück (200) angeordnet ist, das eine zentrale Kolbenbohrung (215) und einen seitlich zur Kolbenbohrung (215) angeordneten Zuführungskanal (235) aufweist,
daß das Zwischenstück (200) an seiner zur Kolbenbohrung (215) weisenden Seite durch einen Absatz in einen hohlzylindrischen Zuführungsbereich (220) und in einen hohlzylindrischen Kolbenbereich (240) unterteilt ist,
daß der Kolbenbereich (240) näher am Düsenhalterkörper (100) angeordnet ist als der Zuführungsbereich (220),
daß der Kolbenbereich (240) einen geringeren Innendurchmesser als der Zuführungsbereich (220) aufweist,
daß der Zuführungskanal (235) im Mantel des Zuführungsbereichs (220) und im Mantel des Kolbenbereichs (240) angeordnet ist. - Kraftstoffeinspritzventil nach Ansprch 4, dadurch gekennzeichnet, daß das Zwischenstück (200) als hohlzylindrische Zuführungshülse (230) ausgebildet ist,
daß der Zuführungskanal (235) im Mantel der Zuführungshülse (230) angeordnet ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19820455 | 1998-05-07 | ||
| DE19820455 | 1998-05-07 | ||
| PCT/DE1999/001358 WO1999057433A2 (de) | 1998-05-07 | 1999-05-05 | Kraftstoffeinspritzventil für brennkraftmaschinen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1076771A2 EP1076771A2 (de) | 2001-02-21 |
| EP1076771B1 true EP1076771B1 (de) | 2004-03-17 |
Family
ID=7866993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99932634A Expired - Lifetime EP1076771B1 (de) | 1998-05-07 | 1999-05-05 | Kraftstoffeinspritzventil für brennkraftmaschinen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6354520B1 (de) |
| EP (1) | EP1076771B1 (de) |
| DE (1) | DE59908891D1 (de) |
| WO (1) | WO1999057433A2 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1076770B1 (de) * | 1998-05-07 | 2003-04-16 | Siemens Aktiengesellschaft | Kraftstoffeinspritzventil für brennkraftmaschinen |
| DE19906383A1 (de) * | 1999-02-16 | 2000-08-24 | Siemens Ag | Injektor für eine Einspritzanlage einer Brennkraftmaschine |
| DE10115214A1 (de) * | 2001-03-28 | 2002-10-10 | Bosch Gmbh Robert | Kraftstoffhochdrucksystem für Brennkraftmaschinen |
| JP2006194173A (ja) * | 2005-01-14 | 2006-07-27 | Denso Corp | 燃料噴射弁 |
| US8205598B2 (en) * | 2010-02-08 | 2012-06-26 | International Engine Intellectual Property Company, Llc | Fuel injector nozzle |
| CN102966476A (zh) * | 2012-12-04 | 2013-03-13 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | 一种无压力室油嘴针阀偶件 |
| JP6080087B2 (ja) * | 2014-02-28 | 2017-02-15 | 株式会社デンソー | 燃料噴射弁 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB962870A (en) | 1961-10-26 | 1964-07-08 | Goetaverken Ab | Improvements in or relating to fuel injectors for internal combustion engines |
| US3531052A (en) * | 1968-02-19 | 1970-09-29 | Clayton Dewandre Holdings Ltd | Fuel injector for internal combustion engines |
| US4153205A (en) * | 1977-10-19 | 1979-05-08 | Allis-Chalmers Corporation | Short seat fuel injection nozzle valve |
| JPS58128464A (ja) | 1982-01-27 | 1983-08-01 | Nippon Soken Inc | 内燃機関の燃料噴射制御装置 |
| CH669822A5 (de) | 1986-02-12 | 1989-04-14 | Sulzer Ag | |
| EP0363142A1 (de) | 1988-10-04 | 1990-04-11 | LUCAS INDUSTRIES public limited company | Brennstoffeinspritzdüsen für Brennkraftmaschinen |
| US5522550A (en) * | 1992-06-10 | 1996-06-04 | Robert Bosch Gmbh | Injection nozzle for internal combustion engines |
| DE4440369A1 (de) * | 1994-11-11 | 1996-05-15 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
| US5497743A (en) | 1994-12-27 | 1996-03-12 | Caterpillar Inc. | Injector for separate control of flow and momentum |
| AUPN391295A0 (en) * | 1995-06-30 | 1995-07-27 | Orbital Engine Company (Australia) Proprietary Limited | Fuel injection apparatus |
| DE29519296U1 (de) | 1995-12-06 | 1997-04-03 | Robert Bosch Gmbh, 70469 Stuttgart | Kraftstoffeinspritzventil für Brennkraftmaschinen |
-
1999
- 1999-05-05 DE DE59908891T patent/DE59908891D1/de not_active Expired - Lifetime
- 1999-05-05 WO PCT/DE1999/001358 patent/WO1999057433A2/de not_active Ceased
- 1999-05-05 US US09/674,690 patent/US6354520B1/en not_active Expired - Fee Related
- 1999-05-05 EP EP99932634A patent/EP1076771B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999057433A2 (de) | 1999-11-11 |
| US6354520B1 (en) | 2002-03-12 |
| EP1076771A2 (de) | 2001-02-21 |
| DE59908891D1 (de) | 2004-04-22 |
| WO1999057433A3 (de) | 1999-12-29 |
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