WO2014001002A1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

Info

Publication number
WO2014001002A1
WO2014001002A1 PCT/EP2013/060764 EP2013060764W WO2014001002A1 WO 2014001002 A1 WO2014001002 A1 WO 2014001002A1 EP 2013060764 W EP2013060764 W EP 2013060764W WO 2014001002 A1 WO2014001002 A1 WO 2014001002A1
Authority
WO
WIPO (PCT)
Prior art keywords
recess
sealing surface
fuel injection
injection valve
housing
Prior art date
Application number
PCT/EP2013/060764
Other languages
German (de)
English (en)
Inventor
Stefan Woerz
Guenther Hohl
Bernd Siewert
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 WO2014001002A1 publication Critical patent/WO2014001002A1/fr

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
    • F02M61/16—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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
    • 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188

Definitions

  • the present invention relates to a fuel injector, in particular for direct injection of fuel into a combustion chamber.
  • Conventional fuel injection valves have a housing in which a
  • Valve needle is moved by means of an actuator.
  • the fuel flows through the housing of the fuel injection valve up to the combustion chamber side
  • Spraying opening These spray openings are opened or closed depending on the position of the valve needle.
  • the valve seat is composed of a first sealing surface in the housing. In this first sealing surface, the spray openings are distributed.
  • the second sealing surface is formed on the valve needle or for example on a ball which is moved by the valve needle. To close the spray openings, the two sealing surfaces come to rest on each other. Disclosure of the invention
  • the fuel injection valve according to the invention according to the features of claim 1 allows by a special geometric design of the housing in the region of the injection openings, an optimization of the flow of the fuel inside the housing of the fuel injection valve.
  • the geometry of the invention provides advantages in spray formation and flow.
  • the robustness of the beam design is increased and the beam angle scattering reduced. This allows
  • Fuel injection valve comprising a housing with a first sealing surface, and a valve element movable in the housing with a second sealing surface.
  • This second sealing surface is formed for example on a ball. The ball is acted upon by means of a valve needle. Depending on the position of the valve element, the second sealing surface lies on the first
  • Sealing surface on or is spaced from the first sealing surface.
  • a recess is formed in the housing.
  • Recess are at least two spray openings for injecting the
  • the fuel flows from the interior of the housing into the recess. From the recess, the fuel is distributed to the individual injection openings.
  • the injection openings are thus lowered relative to the first sealing surface. This lowered position of the injection openings causes the fuel to flow into the injection holes in a flow-optimized manner.
  • the degree of filling of the single spray hole decreases due to the use of the invention
  • a first diameter of the first sealing surface is greater than a second diameter of the recess. It will each be the largest
  • the recess is preferably formed as a blind hole.
  • the shape of the recess may also be referred to as a trough.
  • Spray openings begin at the bottom or side wall of the blind hole or the trough and lead from there through the housing through
  • a dome is formed in the recess.
  • the shape of the recess can also be described as an annular recess or as an annular recess.
  • the dome has the advantage that the volume of the recess is reduced. This improves that
  • the dome is especially in the middle of the
  • the dome brings an improved flow guidance and an improved cross flow of the
  • the injection openings are preferably arranged around the dome.
  • the height of the dome is preferably smaller than the depth of the recess.
  • the height of the dome is at least 10% of the depth of the recess.
  • each spray opening comprises a first section having a first spray opening diameter and a second section having a second spray opening diameter.
  • the first spray opening diameter is smaller than the second spray opening diameter.
  • the second section is closer to the combustion chamber than the first section. The fuel thus flows from the recess into the first section of the injection opening and from the first section into the second section of the injection opening. From the second section of the injection opening of the fuel enters the combustion chamber.
  • the second section of the injection opening can also be referred to as a prechamber. Since a plurality of injection openings are formed in the recess, the first injection opening diameter is substantially smaller than the diameter of the
  • FIG. 1 shows a fuel injection valve according to the invention according to a
  • FIG. 2 shows a detail from FIG. 1.
  • FIG. 1 shows a fuel injection valve 1 with a housing 2.
  • the housing 2 has a side 3 facing the combustion chamber. On this side facing the combustion chamber 3, a plurality of spray openings 4 are formed in the housing 2.
  • valve element 5 In the housing 2, a valve element 5 is arranged.
  • the valve element 5 comprises a valve needle 6 which extends along a longitudinal axis 12.
  • the valve needle 6 is longitudinally movable along the longitudinal axis 12.
  • the valve element 5 comprises a ball 7.
  • the ball 7 is fastened to the valve needle 6.
  • the valve needle 6 is connected to an armature 1 1.
  • the armature 1 1 and thus also the valve needle 6 are moved via an energized coil 10.
  • the first sealing surface 8 is a second
  • FIG. 2 shows in detail the combustion chamber-facing side 3 of the housing 2 with a plurality of injection openings 4.
  • FIG. 2 shows the first sealing surface 8 with a first diameter 15.
  • the second sealing surface also has at least the first diameter 15.
  • a recess 13 in the housing 2 is formed.
  • the recess 13 is also referred to as a blind hole or as a trough.
  • Recess 13 extends from the first sealing surface 8 in the direction of the combustion chamber. In the middle of the recess 13, a dome 14 is arranged.
  • the dome 14 is an integral part of the housing 2.
  • the dome 14 reduces the volume of the recess 13 and extends along the longitudinal axis 12 away from the combustion chamber. Due to the crest 14, the recess 13 may also be referred to as an annular recess or annular recess.
  • injection ports 4 are arranged around the dome 14 around several injection ports 4 arranged.
  • the injection ports 4 begin in the recess 13 and pass through the housing 2 through to the combustion chamber.
  • the recess 13 has a largest second diameter 16.
  • the first diameter 15 and the second diameter 16 are perpendicular to
  • the first diameter 15 is larger than the second diameter 16, so that by means of the second sealing surface 9, the complete recess 13 can be sealed.
  • the recess 13 has a depth 18.
  • the dome 14 has a height 17.
  • the height 17 and the depth 18 are preferably measured along the longitudinal axis 12.
  • the height 17 is smaller than the depth 18. Further, the height 17 is at least 10% of the depth 18, so that by means of the top 14 a sufficient volume reduction of the recess 13 is achieved.
  • Each injection port has a first portion 19 and a second portion 20.
  • the second section 20 is closer to the combustion chamber than the first section 19.
  • the first section 19 has a first section
  • the second section 20 has a second one Spray opening diameter 22 on.
  • the first spray opening diameter 21 is smaller than the second spray opening diameter 22.
  • both the first spray opening diameter 21 and the second spray opening diameter 22 are smaller than the second diameter 16.
  • Fuel injection valve 1 is reached and the injection holes can be made even smaller, in contrast to conventional arrangements.

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

La présente invention concerne une soupape d'injection de combustible (1), en particulier pour l'injection directe de combustible dans une chambre de combustion, comprenant un boîtier (2) pourvu d'une première surface d'étanchéité (8), et un élément de soupape (5) mobile dans le boîtier (2) pourvu d'une seconde surface d'étanchéité (9), la seconde surface d'étanchéité (9) reposant sur la première surface d'étanchéité (8) ou étant espacée de la première surface d'étanchéité (8) en fonction de la position de l'élément de soupape (5). La soupape d'injection de combustible comprend un évidement (13) formé dans la première surface d'étanchéité (8) et au moins deux orifices d'injection (4) dans l'évidement (13), servant à injecter le combustible.
PCT/EP2013/060764 2012-06-27 2013-05-24 Soupape d'injection de combustible WO2014001002A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012210962.5 2012-06-27
DE201210210962 DE102012210962A1 (de) 2012-06-27 2012-06-27 Brennstoffeinspritzventil

Publications (1)

Publication Number Publication Date
WO2014001002A1 true WO2014001002A1 (fr) 2014-01-03

Family

ID=48485202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/060764 WO2014001002A1 (fr) 2012-06-27 2013-05-24 Soupape d'injection de combustible

Country Status (2)

Country Link
DE (1) DE102012210962A1 (fr)
WO (1) WO2014001002A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6966499B2 (en) * 2003-01-09 2005-11-22 Siemens Vdo Automotive Corporation Spray pattern control with non-angled orifices formed on a generally planar metering disc and reoriented on subsequently dimpled fuel injection metering disc
US20060096569A1 (en) * 2004-11-05 2006-05-11 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20060097080A1 (en) * 2004-11-05 2006-05-11 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090057445A1 (en) * 2007-08-29 2009-03-05 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
EP2369166A1 (fr) * 2010-03-22 2011-09-28 Delphi Technologies Holding S.à.r.l. Buse à injection
FR2968720A1 (fr) * 2010-12-09 2012-06-15 Continental Automotive France Injecteur, notamment pour l'injection multipoints de carburant dans un moteur a combustion interne

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6966499B2 (en) * 2003-01-09 2005-11-22 Siemens Vdo Automotive Corporation Spray pattern control with non-angled orifices formed on a generally planar metering disc and reoriented on subsequently dimpled fuel injection metering disc
US20060096569A1 (en) * 2004-11-05 2006-05-11 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20060097080A1 (en) * 2004-11-05 2006-05-11 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090057445A1 (en) * 2007-08-29 2009-03-05 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
EP2369166A1 (fr) * 2010-03-22 2011-09-28 Delphi Technologies Holding S.à.r.l. Buse à injection
FR2968720A1 (fr) * 2010-12-09 2012-06-15 Continental Automotive France Injecteur, notamment pour l'injection multipoints de carburant dans un moteur a combustion interne

Also Published As

Publication number Publication date
DE102012210962A1 (de) 2014-01-02

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