EP1900933A2 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1900933A2
EP1900933A2 EP07016402A EP07016402A EP1900933A2 EP 1900933 A2 EP1900933 A2 EP 1900933A2 EP 07016402 A EP07016402 A EP 07016402A EP 07016402 A EP07016402 A EP 07016402A EP 1900933 A2 EP1900933 A2 EP 1900933A2
Authority
EP
European Patent Office
Prior art keywords
injection valve
fuel injection
roughness
valve according
housing
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.)
Granted
Application number
EP07016402A
Other languages
German (de)
English (en)
Other versions
EP1900933B1 (fr
EP1900933A3 (fr
Inventor
Bernd Hoss
Aschraf Dr. Abdelfattah
Stefan Henrici
Bodo Dr. Durst
Stephan Missy
Florian Dr. Preuss
Wolfgang Dr. Kern
Erik Schünemann
Gottfried Drexler
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1900933A2 publication Critical patent/EP1900933A2/fr
Publication of EP1900933A3 publication Critical patent/EP1900933A3/fr
Application granted granted Critical
Publication of EP1900933B1 publication Critical patent/EP1900933B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M61/08—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 opening in direction of fuel flow
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9038—Coatings

Definitions

  • the invention relates to a fuel injection valve having the features of the preamble of patent claim 1.
  • a cylinder head for an internal combustion engine with a combustion chamber provided in the spark plug is described. Furthermore, the cylinder head has an injection nozzle having a housing end face, which has a closure element which can be moved via an actuator and has a closure body. The housing end face of the injection nozzle forms with the closure body in the closed state a common, planar surface.
  • the ignition safety is ensured at each operating point of the internal combustion engine and a change in the fuel jet geometry by combustion residues at the nozzle opening of the injection nozzle is anticipated.
  • soot may deposit during prolonged operation of the internal combustion engine in the region of the tip of the injection nozzle, whereby the fuel jet pattern is changed.
  • Object of the present invention is to show a measure that avoids a change in the atomization of the fuel, or the fuel spray pattern over time.
  • the tip of the fuel injection valve receives a geometry from the production, as obtained by the fuel injection valve in the prior art only by deposits of soot particles at the top over the term.
  • the fuel injection valve according to the invention has a geometry which corresponds to that of an aged fuel injection valve. The embodiment according to the invention thus does not change the atomization of the fuel or the fuel spray pattern and thus the mixture formation in the internal combustion engine over time.
  • the roughness can be achieved by any geometric fatiguenausformmaschine according to claim 4.
  • the roughness can be generated either by material removal or by material application.
  • the roughness can be achieved by mechanical or chemical processing.
  • PVD Physical Vapor Deposition
  • CVD Chemical Vapor Deposition
  • FIG. 1 shows the tip of a fuel injection valve 1 configured according to the invention. Shown is a half section, wherein a housing 2 is cut and a closure element 4 with a housing-side closure body 5 is not shown cut. The cut surface of the housing 2 is hatched. Since the fuel injection valve 1 is rotationally symmetrical, only one side is shown along a longitudinal axis 9.
  • the closure element 4 is arranged to be movable in a bore 3 in the housing 2 and can be actuated by an actuating element, not shown. With the closure body 5, the bore 3 can be opened and closed. For this purpose, the exit region of the bore has an unnumbered rotationally symmetrical sealing seat between the housing 2 and the closure element 5.
  • the closure element 4 is lifted to open the bore 3, for spraying fuel in an environment 7 of the housing 2.
  • this may be a piezo fuel injection valve.
  • a fuel then flows through an annular gap between the closure element 4 and the bore 3 into the environment 7.
  • the closure body 5 has a radially outer flow-off edge 6 for the fuel.
  • the closure body 5 has a roughness 8 at least in the region of the flow separation edge 6 on the side facing the environment 7.
  • This roughness 8 simulates the deposition of soot in this area for a newly produced fuel injection valve 1.
  • a subsequent deposition of soot thus does not change the mixture-forming properties of the inventively designed fuel injection valve.
  • the roughness 8 preferably has a surface roughness R t of between 0.5 and 200 ⁇ m.
  • the housing 2 it is also possible for the housing 2 to have a roughness 8 in the region of the closure body 5, likewise on the side facing the surroundings 7.
  • the roughness 8 can of Ridges and / or dents and / or raised areas may be formed. These grooves and / or dents and / or raised regions preferably have a width or a diameter of between 0.5 and 100 ⁇ m. Furthermore, the grooves and / or dents and / or raised areas are preferably spaced apart by a maximum of 1000 ⁇ m. Of course, the grooves and / or dents and / or raised areas may also intersect or intersect.
  • the roughness 8 can be generated by material removal or by material application.
  • the material removal can be achieved for example by mechanical or chemical processing.
  • mechanical processing is meant, for example, grinding or blasting with a hard material.
  • chemical material removal is meant, for example, the etching of the surface, for example with an acid.
  • the roughness 8, for example, by a PVD (physical vapor deposition) or a CVD method (chemical vapor deposition) take place.
  • FIG. 2 shows a closure body 5 in the direction of the longitudinal axis 9. Arrows symbolize a machining direction in the processing of the closure body 5 for the inventive design of the fuel injection valve 1.
  • the machining process is carried out in the present embodiment largely perpendicular to the flow separation edge 6. In other processing variants, the machining can also be made obliquely to the flow separation edge 6.
  • any liquid fuel such. As gasoline or diesel or RME (rapeseed methyl ester), etc. are injected.
  • the fuel injection valve 1 according to the invention is preferably used in internal combustion engines with a high-pressure injection of the fuel directly into the combustion chamber. Of course, it can also be used in conjunction with a low-pressure injection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20070016402 2006-09-09 2007-08-22 Soupape d'injection de carburant Not-in-force EP1900933B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610042444 DE102006042444A1 (de) 2006-09-09 2006-09-09 Kraftstoffeinspritzventil

Publications (3)

Publication Number Publication Date
EP1900933A2 true EP1900933A2 (fr) 2008-03-19
EP1900933A3 EP1900933A3 (fr) 2010-10-20
EP1900933B1 EP1900933B1 (fr) 2011-11-30

Family

ID=38739487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070016402 Not-in-force EP1900933B1 (fr) 2006-09-09 2007-08-22 Soupape d'injection de carburant

Country Status (2)

Country Link
EP (1) EP1900933B1 (fr)
DE (1) DE102006042444A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011029941A1 (fr) * 2009-09-14 2011-03-17 Continental Automotive Gmbh Module buse pour soupape d'injection, et soupape d'injection correspondante
WO2012143178A1 (fr) * 2011-04-21 2012-10-26 Robert Bosch Gmbh Composant, en particulier composant d'un système d'injection de carburant possédant une surface

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408722A (en) * 1981-05-29 1983-10-11 General Motors Corporation Fuel injection nozzle with grooved poppet valve
DE19726727A1 (de) * 1997-06-24 1999-01-07 Bosch Gmbh Robert Brennstoffeinspritzventil oder Brennstoffeinspritzdüse
FR2772432B1 (fr) * 1997-12-12 2000-02-18 Magneti Marelli France Injecteur d'essence a revetement ceramique anti-calamine, pour injection directe
DE10012969B4 (de) * 2000-03-16 2008-06-19 Daimler Ag Einspritzdüse und ein Verfahren zur Bildung eines Kraftstoff-Luftgemischs
JP2002364492A (ja) * 2001-05-31 2002-12-18 Unisia Jecs Corp 燃料噴射弁
DE10344584A1 (de) * 2003-09-25 2005-04-28 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10350548A1 (de) * 2003-10-29 2005-06-02 Robert Bosch Gmbh Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011029941A1 (fr) * 2009-09-14 2011-03-17 Continental Automotive Gmbh Module buse pour soupape d'injection, et soupape d'injection correspondante
WO2012143178A1 (fr) * 2011-04-21 2012-10-26 Robert Bosch Gmbh Composant, en particulier composant d'un système d'injection de carburant possédant une surface

Also Published As

Publication number Publication date
EP1900933B1 (fr) 2011-11-30
DE102006042444A1 (de) 2008-03-27
EP1900933A3 (fr) 2010-10-20

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