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WO2001004489A1 - Soupape d'injection de carburant et son procede de production - Google Patents

Soupape d'injection de carburant et son procede de production Download PDF

Info

Publication number
WO2001004489A1
WO2001004489A1 PCT/DE2000/002134 DE0002134W WO0104489A1 WO 2001004489 A1 WO2001004489 A1 WO 2001004489A1 DE 0002134 W DE0002134 W DE 0002134W WO 0104489 A1 WO0104489 A1 WO 0104489A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve member
combustion chamber
fuel injection
bore
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.)
Ceased
Application number
PCT/DE2000/002134
Other languages
German (de)
English (en)
Inventor
Erguen Filiz
Dieter Niemeyer
Güngör Yurtseven
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
Priority to BR0006904-3A priority Critical patent/BR0006904A/pt
Priority to SK289-2001A priority patent/SK2892001A3/sk
Priority to EP00954299A priority patent/EP1114253A1/fr
Priority to JP2001509868A priority patent/JP2003504553A/ja
Publication of WO2001004489A1 publication Critical patent/WO2001004489A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F02M61/04—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
    • F02M61/042—The valves being provided with fuel passages
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • 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

Definitions

  • the invention relates to a fuel injection valve for internal combustion engines, with a valve member which is axially displaceable in the guide bore of a valve body and has a valve sealing surface at its end on the combustion chamber side, which cooperates with a valve seat formed on the end of the guide bore on the combustion chamber side, in order to establish the connection between a high-pressure channel in the valve body and to control at least one injection opening, and with a control channel in the valve member, via which the high-pressure channel can be connected to a relief chamber when the valve member is lifted off the valve seat and which is formed by a blind bore extending from the combustion chamber end of the valve member.
  • Such a fuel injection valve is known from DE 196 23 581 AI.
  • the space between the valve member and the valve body above the valve seat and valve sealing surface acts as a throttle.
  • the throttle cross-section depends on the position of the valve member relative to the valve body.
  • the object of the invention is to provide a fuel injector with an improved To provide injection behavior that is simple and inexpensive to manufacture.
  • a method for producing a valve member for such a fuel injection valve is to be specified.
  • the task is in a Kraf material injection valve for internal combustion engines, with a valve member axially displaceable in a guide bore of a valve body, which has at its combustion chamber end a valve sealing surface with one at the combustion chamber end of
  • Guide bore formed valve seat cooperates to control the connection between a high-pressure channel in the valve body and at least one injection opening, and with a control channel in the valve member, via which the high-pressure channel can be connected to a relief chamber when the valve member is lifted from the valve seat and which is connected to the combustion chamber end of the valve member outgoing blind bore is formed, solved in that a throttle with a constant throttle cross section is formed in the combustion chamber end of the valve member.
  • the throttle has the advantage that the high pressure prevailing at the combustion chamber end of the valve member is slowly reduced when the injection valve is opened and closed. This avoids pressure surges that can damage the fuel injector. Otherwise, the invention provides
  • Fuel injection valve has the same advantages as the fuel injection valve described in DE 19S 23 581 AI.
  • a special embodiment of the invention is characterized in that a throttle bore is provided in the combustion chamber end of the valve member, which opens into the blind bore and whose diameter is significantly smaller than the diameter of the blind bore.
  • the diameter of the throttle bore is preferably 0.1 mm - 0.3 mm.
  • the throttle bore can be implemented simply and inexpensively according to the method specified below.
  • Another special embodiment of the invention is characterized in that the throttle bore extends axially in the valve member. This ensures that the space in the area of the injection openings is permanently connected to the relief space.
  • Another special embodiment of the invention is characterized in that the throttle bore extends obliquely to the longitudinal axis of the valve member and opens below a valve seat edge.
  • the arrangement of the orifice of the throttle bore below the edge of the valve seat ensures that the high-pressure channel is not connected to the relief chamber when the fuel injector is closed.
  • a valve member with a blind hole is closed at the end on the combustion chamber side by kneading / hammering in;
  • the method according to the invention has the advantage that it can be applied to the valve members of conventional fuel injection valves.
  • FIG. 1 shows a longitudinal section through a fuel injection valve according to a first
  • Figure 2 shows a longitudinal section through a
  • Figure 3 shows the free end of a valve member in the initial state
  • Figure 4 shows the valve member of Figure 3 after a first
  • Figure 5 shows the finished valve member according to the first embodiment
  • Figure 6 shows the finished valve member according to the second embodiment.
  • FIG. 1 In the first exemplary embodiment of the invention shown in FIG. 1
  • a piston-shaped valve member 1 is guided axially displaceably in a guide bore of a valve body 2.
  • the free end of the cylindrical valve body 2 projects into the combustion chamber (not shown) supplying internal combustion engine.
  • the valve body 2 rests on an intermediate disk which is adjoined by a spring chamber which serves to receive a return spring.
  • valve member 1 At its end on the combustion chamber side, valve member 1 has a valve sealing surface 3, which in the exemplary embodiment is designed as a conical sealing surface.
  • the valve surface 3 acts on the combustion chamber end of the
  • Valve body 2 formed valve seat surface 4 together, which is hollow-conical.
  • a valve seat edge 10 is formed on the valve sealing surface 3.
  • an injection opening 5 is provided, through which the fuel to be injected can get into the combustion chamber of the internal combustion engine.
  • a high-pressure channel 6 is formed between the valve body 2 and the valve member 1. The high-pressure channel 6 is connected via an injection line to a high-pressure fuel pump which supplies the fuel injection valve with fuel under high pressure.
  • a control channel 7 is provided in valve member 1 for a delayed opening stroke movement of valve member 1.
  • the control channel 7 enables a connection between the high-pressure channel 6 and one during the opening stroke movement of the valve member 1
  • a throttle bore 8 is formed at the end of the control channel 7 directed towards the injection opening 5.
  • the longitudinal axis of the throttle bore 8 coincides with the longitudinal axis of the control channel 7.
  • Throttle bore 8 is considerably smaller than the diameter the control channel 7.
  • the second embodiment of a fuel injection valve according to the invention shown in Figure 2 is similar to the embodiment shown in Figure 1.
  • the same reference numerals are used to designate the same parts. To avoid repetition, reference is made to the above description of FIG. 1.
  • the difference between the first and the second embodiment is that in the in
  • FIG. 2 shown second embodiment, an oblique throttle bore 9 is provided instead of an axial throttle bore.
  • the oblique throttle bore 9 opens into the valve sealing surface 3 below the valve seat edge 10.
  • the fuel injection valve according to the invention functions as follows: in the closed state, the valve member 1 is held by the return spring with its valve sealing surface 3 in contact with the valve seat surface 4. In this state, the injection opening 5 is closed off from the high-pressure duct 6.
  • Injection opening 5 in the combustion chamber of the internal combustion engine is a beneficial effect on the Preparation of the fuel in the combustion chamber.
  • the injection is ended in a known manner by a pressure drop in the high-pressure channel 6.
  • valve member 1 comes into contact with the valve seat surface 4.
  • part of the fuel flows out via the throttle bore 8 or 9 and the control channel 7, as a result of which the closing stroke speed is increased.
  • FIG. 3 shows a valve member 1 with a blind hole 11.
  • a valve member 1 can be used as an output part for producing a valve member according to the invention.
  • the open end of the blind hole 11 is closed by kneading and piercing, as can be seen in FIG.
  • the free end 12 of the valve member 1 is tapered with a valve seat edge 10.
  • the valve member shown in FIG. 4 is drilled out at the closed end.
  • FIGS. 5 and 6 show that, depending on the machining direction of the drilling tool, different throttle bores 8 and 9 can be made at the free end 12 of the valve member 1.
  • the re-drilling at the free end 12 of the valve member 1 is carried out with a drill diameter of 0.1 mm - 0.3 mm.

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, comprenant un élément de soupape (1) déplaçable axialement dans un trou de guidage d'un corps de soupape (2), présentant à son extrémité, côté chambre de combustion, une surface d'étanchéité de soupape (3) coopèrant avec un siège de soupape (4) formé à l'extrémité, côté chambre de combustion, du trou de guidage, en vue de régler la communication entre un conduit haute pression (6) ménagé dans le corps de soupape (2) et au moins un orifice d'injection (5), ainsi qu'un conduit de commande (7) prévu dans l'élément de soupape (1), par l'intermédiaire duquel le conduit haute pression (6), lorsque l'élément de soupape (1) est soulevé de son siège (4), est en communication avec un compartiment de détente, et qui est formé par un trou borgne s'étendant à partir de l'extrémité, côté chambre de combustion, de l'élément de soupape (1). En vue d'améliorer les conditions d'injection de la soupape d'injection de carburant, un étranglement (8) à section d'étranglement constante est formé dans l'extrémité, côté chambre de combustion, de l'élément de soupape (1).
PCT/DE2000/002134 1999-07-07 2000-07-05 Soupape d'injection de carburant et son procede de production Ceased WO2001004489A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR0006904-3A BR0006904A (pt) 1999-07-07 2000-07-05 Válvula de injeção de combustìvel
SK289-2001A SK2892001A3 (en) 1999-07-07 2000-07-05 Fuel injection valve and method for the production thereof
EP00954299A EP1114253A1 (fr) 1999-07-07 2000-07-05 Soupape d'injection de carburant et son procede de production
JP2001509868A JP2003504553A (ja) 1999-07-07 2000-07-05 燃料噴射弁

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19931274A DE19931274A1 (de) 1999-07-07 1999-07-07 Kraftstoffeinspritzventil
DE19931274.5 1999-07-07

Publications (1)

Publication Number Publication Date
WO2001004489A1 true WO2001004489A1 (fr) 2001-01-18

Family

ID=7913896

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/002134 Ceased WO2001004489A1 (fr) 1999-07-07 2000-07-05 Soupape d'injection de carburant et son procede de production

Country Status (7)

Country Link
EP (1) EP1114253A1 (fr)
JP (1) JP2003504553A (fr)
BR (1) BR0006904A (fr)
CZ (1) CZ2001805A3 (fr)
DE (1) DE19931274A1 (fr)
SK (1) SK2892001A3 (fr)
WO (1) WO2001004489A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4710785B2 (ja) * 2006-10-03 2011-06-29 トヨタ自動車株式会社 内燃機関の燃料噴射ノズル

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1817471A1 (de) * 1968-01-01 1969-08-14 British Internal Comb Engine R Kraftstoff-Einspritzvorrichtung fuer Brennkraftmaschinen
EP0723076A2 (fr) * 1995-01-23 1996-07-24 Cummins Engine Company, Inc. Duse d'injection de combustible fermée
DE19623581A1 (de) * 1995-07-21 1997-01-23 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
US5765755A (en) * 1997-01-23 1998-06-16 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1817471A1 (de) * 1968-01-01 1969-08-14 British Internal Comb Engine R Kraftstoff-Einspritzvorrichtung fuer Brennkraftmaschinen
EP0723076A2 (fr) * 1995-01-23 1996-07-24 Cummins Engine Company, Inc. Duse d'injection de combustible fermée
DE19623581A1 (de) * 1995-07-21 1997-01-23 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
US5765755A (en) * 1997-01-23 1998-06-16 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector

Also Published As

Publication number Publication date
SK2892001A3 (en) 2001-12-03
EP1114253A1 (fr) 2001-07-11
DE19931274A1 (de) 2001-01-25
CZ2001805A3 (cs) 2001-12-12
BR0006904A (pt) 2001-06-12
JP2003504553A (ja) 2003-02-04

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