WO1997023724A1 - 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
WO1997023724A1
WO1997023724A1 PCT/DE1996/001234 DE9601234W WO9723724A1 WO 1997023724 A1 WO1997023724 A1 WO 1997023724A1 DE 9601234 W DE9601234 W DE 9601234W WO 9723724 A1 WO9723724 A1 WO 9723724A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fuel injection
closure plate
face
valve member
Prior art date
Application number
PCT/DE1996/001234
Other languages
German (de)
English (en)
Inventor
Detlev Potz
Guenter Lewentz
Uwe Gordon
Stefan Haug
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
Priority to JP9523188A priority Critical patent/JPH11501382A/ja
Priority to DE59608146T priority patent/DE59608146D1/de
Priority to EP96922757A priority patent/EP0811119B1/fr
Publication of WO1997023724A1 publication Critical patent/WO1997023724A1/fr

Links

Classifications

    • 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
    • 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 invention is based on a fuel injection valve for internal combustion engines according to the preamble of claim 1.
  • a fuel injection valve known from DE-Gbm G 93 20 433.7
  • the end face of a valve body on the combustion chamber side defines an annular one
  • the pressure chamber into which an inlet line from the fuel injection pump opens.
  • the pressure chamber is delimited radially inwards by a pin projecting axially from the end face of the valve body, the cross section of which tapers conically at the end on the combustion chamber side to form a valve seat.
  • the pressure chamber is delimited by a disk-shaped valve membrane which is fastened to the valve body at its outer edge region with the interposition of a sleeve by means of a clamping nut and which has a central opening, the annular edge of which forms a sealing edge which interacts with the valve seat.
  • valve membrane with its sealing surface lies in the closed NEN state of the fuel injection valve under prestress on the valve seat, so that the pressure chamber is closed in the direction of the combustion chamber of the internal combustion engine to be supplied. If an injection is to take place, the pressure chamber is acted upon by high fuel pressure via the feed line, which, in the process, lifts the resilient valve membrane against the prestressing force with its sealing surface from the valve seat. As a result, the fuel injection takes place via the ring gap on the peg, which is analogous to known throttle pin nozzles. The end of the injection process is controlled by stopping the high pressure supply in the pressure chamber.
  • the known fuel injection valve has the disadvantage that only one injection opening is possible via which the fuel jet can be shaped relatively imprecisely.
  • the possible stroke of the valve membrane and the contact surface between the valve seat and the valve sealing surface acting as a sealing surface are limited due to the clamping on the outer edge.
  • the fuel injection valve according to the invention for internal combustion engines with the characterizing features of claim 1 has the advantage, in contrast, that by fixing the disk-shaped valve member in the center
  • valve sealing surface on the radially outer region of the valve member enables a considerably larger contact surface in the sealing region compared to the known solution.
  • Another advantage is achieved by arranging the injection openings in a closure plate delimiting the pressure space, which enables the position and number of the injection openings to be individually adapted to the respective requirements. Since the valve membrane no longer has a direct influence on the shaping of the injection jet, it can be of a very simple design.
  • the fixing of the valve member at its center can alternatively be non-positive, e.g. Clamp between two
  • the injection openings are arranged downstream of the sealing seat between the valve sealing surface and the valve seat, it being possible for the inlet openings to be arranged radially outside of the overlap with the valve member or covered by its radial edge.
  • the overflow of fuel from the pressure chamber into a space enclosed between the valve body end face and the end face of the valve member facing away from the pressure chamber is advantageously prevented by a sealing ring which is designed so that it does not impair the lifting of the valve member from the seat.
  • the necessary opening pressure of the injection valve can be adjusted by dimensioning the thickness of a spacer sleeve between the valve body and the closure plate, via which the distance between the central fixation of the valve member and its contact with the valve seat can be changed in the outer radial area.
  • FIG. 1 shows a longitudinal section through a first exemplary embodiment of the injection valve
  • FIG. 2 shows an enlarged detail from FIG. 1 with the representation of the valve member area essential to the invention
  • FIG. 3 shows a detail from a second exemplary embodiment in which the valve member welds to the pin of the valve body
  • FIG. 4 shows a detail from a third exemplary embodiment, in which the inlet opening of the injection opening is covered by the valve member (valve membrane).
  • the first exemplary embodiment of the fuel injection valve according to the invention shown in an enlarged detail in FIG. 1 and in FIG. 2 has a rotationally symmetrical valve body 1, at the inflow end of which a connection 3 for a fuel injection pump (not shown) leading away
  • the valve body 1 also has one with the fuel injection line connected inlet channel 5, which is formed by an axial through hole which extends from the upper end face in the area of the connection 3 of the valve body 1 to a pin 9 projecting axially from the lower, combustion chamber-side end face 7 of the valve body 1.
  • valve member 11 On the end face of the valve member 11 facing away from the valve body 1, there is a further pin 15 of a closure plate 17 on the central area of the valve member 11, which covers the contact area of the pin 9, so that the valve member 11 is clamped between the pins 9 and 15 and opposite the valve body 1 is fixed in its position.
  • the closure plate having the second pin 15 is disc-shaped and is clamped axially by a clamping nut 19 encompassing its radially outer edge against the combustion-chamber-side end face 7 of the valve body 1, a spacer sleeve 21 being clamped between the closure plate and the end face 7 of the valve member 1.
  • the pin 15 of the closure plate 17 has a connecting channel 23 which, starting from its end overlap with the passage opening 13 in the valve member 11, opens into a pressure chamber 25 formed between the valve member 11 and the closure plate 17.
  • Connection channel 23 is preferably by an axial Blind bore and a transverse bore leading away from this.
  • valve sealing surface 27 which, under prestress (internal stress of the valve membrane), bears sealingly against an annular valve seat surface 29 formed by part of the end face of the closure plate 17 facing away from the combustion chamber.
  • Injection openings 31 can be freely selected and can be adapted to the respective conditions. To avoid an overflow of fuel in an enclosed between the end of the valve member 11 facing away from the pressure chamber 25 and the end face 7 of the valve body 1
  • Space 33 is a sealing ring 35 clamped between the radially outer edge of the closure plate 17 and the spacer sleeve 21, which rests on the edge of the valve member 11 facing away from the pressure chamber and is designed such that it does not impair the lifting movement of the free end of the valve member 11.
  • an annular shoulder 37 is preferably provided on the radially outward-pointing edge region of the closure plate 17, via which the thickness of the closure plate 17 increases on the outer circumference in the direction of the valve body 1.
  • the fuel injection valve for internal combustion engines works in the following manner.
  • the injection valve is supplied with high-pressure fuel in a known manner from the injection pump via the injection line, which continues through the inlet channel 5 into the fuel-filled pressure chamber 25.
  • the fuel under high pressure lifts the free outer edge of the valve member 11 with the valve sealing surface 27 against the biasing force of the resilient valve member 11 (valve membrane) from the valve seat 29, so that an opening cross section is opened, via which the fuel from the pressure chamber 25 to the Injection openings 31 flows through which it continues into the combustion chamber
  • the sealing ring 35 which is preferably made of temperature-resistant and fuel-resistant rubber, prevents fuel from flowing into the space 33.
  • the fuel injection is terminated by the high-pressure fuel supply to the injection valve being interrupted and, as a result, the pressure in the pressure chamber 25 falling below the necessary injection pressure, so that the valve member 11 with its valve sealing surface 27 is in contact with the
  • Valve seat surface 29 returns and the injector closes.
  • the valve Function and the reset function integrated in one component, namely the valve member 11.
  • the injection pressure can be adjusted via the dimensioning of the thickness of the spacer sleeve 21, via which the axial distance between the central fixation and the outer contact of the valve member 11 and thus its pretensioning force can be adjusted.
  • the second exemplary embodiment shown in a detail in FIG. 3 differs from the first exemplary embodiment in the design of the central fixing and fastening of the valve member 11 on the pin 9 of the valve body 1, the valve member 11 being welded to the pin 9 here, preferably laser-welded .
  • This fastening of the valve member 11 has the advantage that there is no need for a pin on the closure plate 17, which considerably simplifies its construction.
  • Closure plate 17 which is formed here in one piece with the spacer sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'injection de carburant pour moteurs à combustion interne, qui comprend un corps de soupape (1) dont l'extrémité située côté chambre de combustion est munie d'une chambre de pression (25) annulaire reliée à un canal d'amenée (5). Cette chambre de pression est délimitée par un élément (11) de soupape faisant ressort qui repose sous l'effet de sa propre contrainte sur un siège de soupape (29) fixe, par l'intermédiaire d'une surface d'étanchéité (27), siège d'où il peut être soulevé par la pression régnant dans la chambre de pression (25). Au moins un orifice d'injection (31) est placé en aval de la section d'ouverture, commandée par l'élément de soupape, dans la chambre de combustion du moteur à combustion interne. L'élément (11) qui fait ressort et se présente sous forme de membrane est fixé en son milieu contre le corps (1) de la soupape et forme, avec sa zone marginale dirigée vers l'extérieur, la surface d'étanchéité (27) pouvant être soulevée par effet ressort depuis le siège (29) de la soupape.
PCT/DE1996/001234 1995-12-23 1996-07-09 Soupape d'injection de carburant pour moteurs a combustion interne WO1997023724A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP9523188A JPH11501382A (ja) 1995-12-23 1996-07-09 内燃機関用の燃料噴射弁
DE59608146T DE59608146D1 (de) 1995-12-23 1996-07-09 Kraftstoffeinspritzventil für brennkraftmaschinen
EP96922757A EP0811119B1 (fr) 1995-12-23 1996-07-09 Soupape d'injection de carburant pour moteurs a combustion interne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19548540A DE19548540A1 (de) 1995-12-23 1995-12-23 Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19548540.8 1995-12-23

Publications (1)

Publication Number Publication Date
WO1997023724A1 true WO1997023724A1 (fr) 1997-07-03

Family

ID=7781284

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/001234 WO1997023724A1 (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

Citations (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 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzdüse für Brennkraftmaschinen

Patent Citations (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 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzdüse für Brennkraftmaschinen

Also Published As

Publication number Publication date
CN1075871C (zh) 2001-12-05
EP0811119A1 (fr) 1997-12-10
CN1173911A (zh) 1998-02-18
EP0811119B1 (fr) 2001-11-07
DE19548540A1 (de) 1997-06-26
JPH11501382A (ja) 1999-02-02
KR19980702022A (ko) 1998-07-15
RU2161723C2 (ru) 2001-01-10
DE59608146D1 (de) 2001-12-13

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