EP0811119B1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP0811119B1
EP0811119B1 EP96922757A EP96922757A EP0811119B1 EP 0811119 B1 EP0811119 B1 EP 0811119B1 EP 96922757 A EP96922757 A EP 96922757A EP 96922757 A EP96922757 A EP 96922757A EP 0811119 B1 EP0811119 B1 EP 0811119B1
Authority
EP
European Patent Office
Prior art keywords
valve
closure plate
fuel injection
pressure chamber
valve body
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
Application number
EP96922757A
Other languages
German (de)
English (en)
Other versions
EP0811119A1 (fr
Inventor
Detlev Potz
Guenter Lewentz
Uwe Gordon
Stefan Haug
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 EP0811119A1 publication Critical patent/EP0811119A1/fr
Application granted granted Critical
Publication of EP0811119B1 publication Critical patent/EP0811119B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3006—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being actuated by the pressure of the fluid to be sprayed
    • 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
    • F02M61/047—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 the valves being formed by deformable nozzle parts, e.g. flexible plates or discs with fuel discharge orifices

Definitions

  • the fuel injection valve according to the invention for internal combustion engines with the characterizing features of the claim 1 has the advantage that by arranging of the injection openings in a delimiting the pressure chamber Locking plate an individual adjustment of the position and number of injection openings to the respective requirements is made possible. Since the valve membrane is now none direct influence more on the shaping of the injection jet exercises, it can be very simple.
  • the valve member can be fixed at its center alternatively non-positive, e.g. Clamp between two Stops or cohesively, e.g. Welding on one Stop.
  • the injection openings are between the sealing seat Valve sealing surface and valve seat arranged downstream, the inlet openings radially outside the Coverage with the valve member or from its radial Edge can be arranged covered.
  • the overflow of fuel from the pressure chamber into one between the valve body face and that of the pressure chamber facing end face of the valve member included Space is advantageously by a sealing ring prevented, which is designed so that it takes off of the valve member is not affected by the seat.
  • the necessary opening pressure of the injection valve is through the Dimensioning the thickness of a spacer between the Valve body and the closure plate adjustable, via the the distance between the central fixation of the Valve member and its contact with the valve seat in the outer radial range is changeable.
  • Fuel injection valves for internal combustion engines are in shown in the drawing and are described in more detail below explained.
  • valve membrane formed disc-shaped valve member 11 On the end face of the pin 9 of the Valve body 1 is located as a curved valve membrane formed disc-shaped valve member 11 from a resilient material with its central area, where in Area of overlap with the inlet channel 5 in the pin 9 a through opening 13 is arranged in the valve member 11.
  • the closure plate having the second pin 15 is thereby disc-shaped and is one of their radially outer edge encompassing clamping nut 19 axially against the combustion chamber end face 7 of the valve body 1 clamped, between the closure plate and the End face 7 of valve member 1 has a spacer sleeve 21 is clamped.
  • the pin 15 of the closure plate 17 has one Connection channel 23 on the basis of its frontal overlap with the through opening 13 in Valve member 11 in a between the valve member 11 and the Sealing plate 17 formed pressure chamber 25 opens out.
  • the Connection channel 23 is preferably by an axial Blind bore and a transverse bore leading away from this educated.
  • the between the curved valve member 11 and the End of the closure plate 17 facing away from the combustion chamber limited pressure chamber 25 is due to the resilient contact of the free, radially outward facing edge area of the Sealed valve member 11 on the closure plate 17.
  • the radial outer wall area forms the Face of the valve member 11 facing the combustion chamber Valve sealing surface 27 under prestress (internal stress of the valve membrane) on one through part of the End face of the closure plate 17 facing away from the combustion chamber formed annular valve seat surface 29 sealing is present. These are on the system of valve seat 29 and valve sealing surface 27 formed sealing seat downstream Subsequent injection openings 31, which are considered radially outward bores in the sealing plate of the sealing seat are trained.
  • the fuel injector according to the invention for Internal combustion engines work in the following way.
  • the injection pressure can be dimensioned adjust the thickness of the spacer sleeve 21 over which the axial distance between the central fixation and the outer System of the valve member 11 and thus its biasing force is adjustable.
  • the second shown in a detail in Figure 3 Embodiment differs from the first Embodiment in the formation of the central fixation and attachment of the valve member 11 to the pin 9 of the Valve body 1, the valve member 11 here with the Pin 9 is welded, preferably laser-welded.
  • This attachment of the valve member 11 has the Advantage that on a pin on the closure plate 17th can be dispensed with, which is essential to their structure simplified.
  • FIG. 4 illustrated third embodiment covers that resilient valve member 11 with its outer, the Valve sealing surface 27 bearing the edge completely Entry opening of the injection opening 31 in the Closure plate 17, which here is in one piece with the spacer sleeve is trained.

Claims (10)

  1. Injecteur de carburant pour des moteurs à combustion interne comprenant un corps d'injecteur (1) dont l'extrémité du côté de la chambre de combustion comporte une chambre de pression (25) annulaire reliée à un canal d'alimentation (5), cette chambre étant délimitée par un organe d'obturation (11), élastique, appliqué sous sa précontrainte avec une surface d'étanchéité de soupape (27) contre un siège de soupape (29) fixe pour pouvoir être soulevé de celui-ci par la pression régnant dans la chambre de pression (25), l'organe d'obturation (11), élastique en forme de membrane, étant bloqué en son milieu par rapport au corps (1) de l'injecteur et forme avec sa zone de bord dirigée radialement vers l'extérieur, la surface d'étanchéité de soupape (27) qui se soulève élastiquement du siège de soupape (29),
    caractérisé en ce que
    au moins un orifice d'éjection (31) est prévu en aval dans la chambre de combustion du moteur à combustion interne, pour la section d'ouverture commandée,
    l'organe d'obturation (11) est situé entre le corps d'injecteur (1) et une plaque de fermeture (17) et
    au moins un orifice d'éjection (31) est réalisé dans la plaque de fermeture (17).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le volume annulaire défini entre la plaque de fermeture (17) et l'organe d'obturation (11) élastique constitue la chambre de pression (25).
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    le canal d'alimentation (5) est adjacent dans le corps (1) de l'injecteur au niveau de la surface frontale du téton (9) contre une ouverture de passage (13) dans la zone centrale de l'organe d'obturation (11), au niveau de laquelle débouche d'autre part un canal de liaison (23) dans le téton (15) de la plaque de fermeture (17), qui débouche dans la chambre de pression (25).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    le canal de liaison (23) est formé dans le téton (15) de la plaque de fermeture (17) par un trou borgne axial dans lequel arrive un perçage transversal.
  5. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la plaque de fermeture (17) est serrée à l'aide d'un écrou de serrage (19) entourant radialement son bord extérieur, pour être serrée axialement contre le corps de soupape (1), et entre la surface frontale (7) du corps (1) et la plaque de fermeture (17), on a serré un manchon d'écartement (21).
  6. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    la zone radiale extérieure de la surface frontale de la plaque de fermeture (17) du côté tourné vers la chambre de pression (25) est en forme de surface de siège de soupape (29) annulaire, contre laquelle s'appuie l'organe d'obturation (11) par sa surface d'étanchéité de soupape (27), prévue dans la zone de son bord extérieur radial libre, selon un appui avec précontrainte.
  7. Injecteur de carburant selon la revendication 6,
    caractérisé en ce que
    la plaque de fermeture (17) présente dans sa zone de bord radiale extérieure de la surface frontale tournée vers la chambre de pression, un décrochement annulaire (37) par lequel on augmente l'épaisseur de la plaque de fermeture (17) dans la zone du bord en direction du corps (1) de l'injecteur, et un jeu subsiste entre le bord de l'organe d'obturation (11) et l'intervalle annulaire (37).
  8. Injecteur de carburant selon la revendication 6,
    caractérisé par
    un grand nombre d'orifices d'éjection (31) dans la plaque de fermeture (17), ces orifices situés radialement à l'extérieur de la surface de siège de soupape (29) annulaire, partant de la surface frontale de la plaque de fermeture (17) délimitant la chambre de pression (25) pour déboucher dans la chambre de combustion du moteur à combustion interne.
  9. Injecteur de carburant selon la revendication 5,
    caractérisé par
    un joint d'étanchéité (35) entre la plaque de fermeture (17) et le manchon d'écartement (21), ce joint s'appuyant contre la surface frontale de l'organe d'obturation (11) du côté non tourné vers la chambre de pression, pour éviter le débordement du carburant dans le volume (33) formé entre l'organe d'obturation (11) et la surface frontale (7) du corps (1).
  10. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'organe d'obturation (11) élastique est réalisé sous la forme d'une rondelle bombée en matière élastique.
EP96922757A 1995-12-23 1996-07-09 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP0811119B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19548540 1995-12-23
DE19548540A DE19548540A1 (de) 1995-12-23 1995-12-23 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE1996/001234 WO1997023724A1 (fr) 1995-12-23 1996-07-09 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0811119A1 EP0811119A1 (fr) 1997-12-10
EP0811119B1 true EP0811119B1 (fr) 2001-11-07

Family

ID=7781284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96922757A Expired - Lifetime EP0811119B1 (fr) 1995-12-23 1996-07-09 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (7)

Country Link
EP (1) EP0811119B1 (fr)
JP (1) JPH11501382A (fr)
KR (1) KR19980702022A (fr)
CN (1) CN1075871C (fr)
DE (2) DE19548540A1 (fr)
RU (1) RU2161723C2 (fr)
WO (1) WO1997023724A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10064802A1 (de) * 2000-12-22 2002-06-27 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102014215475A1 (de) * 2014-08-05 2016-02-11 Robert Bosch Gmbh Injektor, insbesondere Einblasinjektor für gasförmigen Kraftstoff
CN105396717B (zh) * 2015-12-24 2017-10-24 上海震界自动化设备制造有限公司 气控膜片式喷嘴
CN110538754B (zh) * 2019-09-10 2021-06-08 魏新 一种木材喷涂装置
CN111016434B (zh) * 2019-12-25 2021-07-27 西安交通大学 一种基于挤压模式的薄膜式喷墨打印头

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1595624A (en) * 1924-03-17 1926-08-10 Scott Philip Lane Atomizer valve
US4635849A (en) * 1984-05-03 1987-01-13 Nippon Soken, Inc. Piezoelectric low-pressure fuel injector
DE9320433U1 (de) * 1993-04-10 1994-09-29 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen

Also Published As

Publication number Publication date
KR19980702022A (ko) 1998-07-15
CN1075871C (zh) 2001-12-05
DE59608146D1 (de) 2001-12-13
CN1173911A (zh) 1998-02-18
JPH11501382A (ja) 1999-02-02
DE19548540A1 (de) 1997-06-26
EP0811119A1 (fr) 1997-12-10
WO1997023724A1 (fr) 1997-07-03
RU2161723C2 (ru) 2001-01-10

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