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EP1433951A1 - Injecteur de carburant de moteur à combustion interne - Google Patents

Injecteur de carburant de moteur à combustion interne Download PDF

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Publication number
EP1433951A1
EP1433951A1 EP03013030A EP03013030A EP1433951A1 EP 1433951 A1 EP1433951 A1 EP 1433951A1 EP 03013030 A EP03013030 A EP 03013030A EP 03013030 A EP03013030 A EP 03013030A EP 1433951 A1 EP1433951 A1 EP 1433951A1
Authority
EP
European Patent Office
Prior art keywords
contact surface
fuel injection
valve
blind bore
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.)
Withdrawn
Application number
EP03013030A
Other languages
German (de)
English (en)
Inventor
Andreas Köninger
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 EP1433951A1 publication Critical patent/EP1433951A1/fr
Withdrawn legal-status Critical Current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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/001—Control chambers formed by movable sleeves
    • 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
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies

Definitions

  • the invention relates to a fuel injection valve for Internal combustion engines, as known from DE 100 24 703 A1 is.
  • a fuel injection valve includes one Valve body in which a blind bore is formed, which starts from a contact surface of the valve body and on formed several injection openings at the closed end are in the installed position of the fuel injector open into the combustion chamber in the internal combustion engine.
  • the A valve needle is arranged longitudinally displaceable, the one with its combustion chamber end with one in the valve body trained valve seat cooperates and so the Injection openings open or close.
  • the between the Valve needle and the wall of the blind hole remaining space can be fed with fuel at a high level Fill the pressure when the valve needle enters the injection ports releases through the injection ports in the combustion chamber is injected.
  • the valve body lies with its contact surface, of which the Blind hole runs out on the contact surface of another component of the fuel injector, for example one Washer or a holding body.
  • the valve body is thereby by a clamping device, for example a Clamping nut, pressed against the other component by one appropriate sealing of the blind hole on the contact surface to obtain. Due to the high pressure in the blind bore nevertheless between the valve body and the other Component leaks, because the forces can not be increased by the clamping device and due to the relatively large contact surface, only small surface pressures can be reached.
  • the fuel injector according to the invention with the characteristic Features of claim 1, however, points the advantage that the seal on the contact surface the valve body is improved. For this is in the Blind bore of the valve body near the contact surface an annular groove is formed. Due to the high fuel pressure in the blind hole leads to an expansion of the ring groove, so that the area around the opening of the blind hole in the contact surface slightly raised and pressed against the other component becomes. This increases the surface pressure by the opening of the blind hole around, which improves sealing has the consequence.
  • the distance of the contact surface should preferably be 0.5 to 1.5 mm.
  • FIG. 1 is a fuel injection valve according to the invention shown in longitudinal section.
  • the fuel injector comprises a valve body 1 with a contact surface 50 rests on a contact surface 55 of an intermediate disk 3.
  • the intermediate disc 3 is in turn on a holding body 5, the valve body 1 by means of a clamping nut 7, which engages in an external thread of the holding body 5 against the washer 3 and thus pressed against the holding body 5 becomes.
  • a stepped in diameter Blind bore 10 formed by the contact surface 50 goes out and which at its closed end by an im essential conical valve seat 14 is limited.
  • At the Combustion chamber end of the valve body 1 are a plurality of injection openings 16 formed in the combustion chamber of the Internal combustion engine open.
  • valve needle 12 In the blind bore 10 is one piston-shaped valve needle 12 arranged to be longitudinally displaceable, a valve sealing surface at its valve seat end 15, which cooperates with the valve seat 14 and so forms a valve that connects the between the Valve needle 12 and the wall of the blind bore 10 remaining Annular gap 18 to the injection openings 16 opens or closes.
  • the blind bore 10 expanded and there is a sleeve 22 arranged there End portion of the valve needle 12 facing away from the valve seat and rests on the intermediate disc 3.
  • the Valve needle 12 surrounded by a support ring 26, the an annular shoulder of the valve needle 12 supports.
  • a closing spring 24 is arranged, which is designed as a helical compression spring and the surrounds the valve needle 12.
  • the valve needle 10 is in a central portion 112 in the blind bore 10 out, at this middle section 112 four grindings 20 are provided, one Enable fuel flow in the direction of the injection openings 16.
  • a pressure shoulder 9 which is formed by Fuel pressure is applied in the annular gap 18.
  • the blind hole 10 can via a in the holding body 5 and the washer 3 running inlet channel 8 with fuel under be filled at high pressure, which is from the valve seat 14 lifted valve needle 12 through the bevels 20 and Annular gap 18 flows to the injection openings.
  • control chamber 30 is connected to the inlet channel via an inlet throttle 32 8 connected so that from the inlet channel 8 always Fuel flows into the control chamber 30 as long as there the pressure is lower.
  • the control room 30 is above beyond an outlet throttle 34 with a leak oil chamber 36 connectable, this connection by a control valve 40 can be opened or closed.
  • the annular groove 42 is in the left half of FIG. 2 in shown unpressurized state, in which the contact surface 50 a Level forms.
  • the ring groove 42 shown at high pressure in the blind bore 10 The pressure causes the annular groove 42 to widen inter alia in the longitudinal direction of the valve body 1, so that the area of the contact surface 50 around the opening of the Blind bore 10 bulges and against the contact surface 55 of the Washer 3 is pressed.
  • Deformation shown in the figure 2 greatly exaggerated; even at high pressures of 150 MPa and above only a few bulges in the steels used Micrometers. Increasing the surface pressure around the opening however, the blind bore 10 is considerable and leads to one good sealing and thus to prevent Leakage.
  • the annular groove 42 on the one hand be deep and a short distance from the contact surface Have 50; on the other hand results from a deep ring groove 42 has a strong notch effect and thus a Weakening of the valve body 1 in this area, resulting in a plastic deformation, which in turn can lead to the Impair the function of the fuel injector can.
  • the distance of the annular groove 42 to the contact surface 42 not arbitrary for manufacturing reasons be reduced.
  • the annular groove 42 is provided, alternatively also can be provided to form a slightly different shape, about a semi-ellipse.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
EP03013030A 2002-12-23 2003-06-10 Injecteur de carburant de moteur à combustion interne Withdrawn EP1433951A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10260724 2002-12-23
DE2002160724 DE10260724A1 (de) 2002-12-23 2002-12-23 Kraftstoffeinspritzventil für Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
EP1433951A1 true EP1433951A1 (fr) 2004-06-30

Family

ID=32404212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03013030A Withdrawn EP1433951A1 (fr) 2002-12-23 2003-06-10 Injecteur de carburant de moteur à combustion interne

Country Status (4)

Country Link
EP (1) EP1433951A1 (fr)
JP (1) JP2004204850A (fr)
CN (1) CN1510268A (fr)
DE (1) DE10260724A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2865776A1 (fr) * 2004-02-04 2005-08-05 Bosch Gmbh Robert Systeme d'injection de carburant pour un moteur a combustion interne
WO2006117259A1 (fr) * 2005-05-02 2006-11-09 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion interne
EP1873393A1 (fr) * 2006-06-27 2008-01-02 Robert Bosch Gmbh Injecteur
WO2008125377A1 (fr) * 2007-04-11 2008-10-23 Robert Bosch Gmbh Injecteur de carburant
WO2010006827A1 (fr) * 2008-07-14 2010-01-21 Robert Bosch Gmbh Injecteur de carburant résistant aux hautes pressions
EP2336543A2 (fr) * 2009-12-21 2011-06-22 Robert Bosch GmbH Soupape d'injection de carburant pour moteurs à combustion interne
WO2013000638A1 (fr) * 2011-06-30 2013-01-03 Robert Bosch Gmbh Injecteur de carburant

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054927A1 (de) * 2005-11-17 2007-05-31 Siemens Ag Kraftstoffinjektor mit verbesserter Einspritzmengenstabilität
DE102008000171B4 (de) * 2007-01-31 2017-04-06 Denso Corporation Injektor und Plattenbauteil für diesen
JP5375762B2 (ja) * 2010-07-14 2013-12-25 株式会社デンソー 燃料噴射装置
CN104265534B (zh) * 2014-08-05 2017-05-03 中国第一汽车股份有限公司无锡油泵油嘴研究所 一种喷油速率可变共轨系统喷油器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010020648A1 (en) * 2000-02-24 2001-09-13 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
DE10024703A1 (de) * 2000-05-18 2001-11-22 Bosch Gmbh Robert Einspritzanordnung für ein Kraftstoff-Speichereinspritzsystem einer Verbrennungsmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010020648A1 (en) * 2000-02-24 2001-09-13 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
DE10024703A1 (de) * 2000-05-18 2001-11-22 Bosch Gmbh Robert Einspritzanordnung für ein Kraftstoff-Speichereinspritzsystem einer Verbrennungsmaschine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2865776A1 (fr) * 2004-02-04 2005-08-05 Bosch Gmbh Robert Systeme d'injection de carburant pour un moteur a combustion interne
WO2006117259A1 (fr) * 2005-05-02 2006-11-09 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion interne
EP1873393A1 (fr) * 2006-06-27 2008-01-02 Robert Bosch Gmbh Injecteur
WO2008125377A1 (fr) * 2007-04-11 2008-10-23 Robert Bosch Gmbh Injecteur de carburant
WO2010006827A1 (fr) * 2008-07-14 2010-01-21 Robert Bosch Gmbh Injecteur de carburant résistant aux hautes pressions
EP2336543A2 (fr) * 2009-12-21 2011-06-22 Robert Bosch GmbH Soupape d'injection de carburant pour moteurs à combustion interne
WO2013000638A1 (fr) * 2011-06-30 2013-01-03 Robert Bosch Gmbh Injecteur de carburant

Also Published As

Publication number Publication date
JP2004204850A (ja) 2004-07-22
DE10260724A1 (de) 2004-07-01
CN1510268A (zh) 2004-07-07

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