WO2003027489A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

Info

Publication number
WO2003027489A1
WO2003027489A1 PCT/DE2002/002695 DE0202695W WO03027489A1 WO 2003027489 A1 WO2003027489 A1 WO 2003027489A1 DE 0202695 W DE0202695 W DE 0202695W WO 03027489 A1 WO03027489 A1 WO 03027489A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
sleeve
fuel injection
injection valve
valve according
Prior art date
Application number
PCT/DE2002/002695
Other languages
German (de)
English (en)
Inventor
Ferdinand Reiter
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 WO2003027489A1 publication Critical patent/WO2003027489A1/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
    • F02M61/1853—Orifice plates
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • an electromagnetically actuated fuel injection valve which among other things has a non-magnetic sleeve as a connecting part between a core and a valve seat body. With its two axial ends, the sleeve is firmly connected to the core and to the valve seat body. The sleeve runs over its entire axial length with a constant outside diameter and a constant inside diameter and accordingly has inlet openings of the same size at both ends.
  • the core and the valve seat body are designed with an outer diameter such that they extend into the sleeve at the two ends, so that the sleeve completely surrounds the two components core and valve seat body in these protruding areas.
  • a valve needle with an armature moves axially, which is guided through the sleeve becomes.
  • the fixed connections of the sleeve to the core and the valve seat body are, for. B. achieved by welding, as is also known from DE 43 10 819 AI.
  • a thin-walled, non-magnetic sleeve is used as a connecting part between the core and the valve seat body
  • this sleeve largely corresponds to the sleeve known from US 4,946,107 A.
  • the volume and weight of the fuel injection valves can be reduced with the help of the tubular sleeves.
  • a fuel injector is already known from DE 195 47 40S AI, which has an elongated sleeve which has a bottom portion at its downstream end.
  • the bottom section runs largely perpendicular to the otherwise axial extension of the sleeve along a longitudinal valve axis.
  • a valve closing body interacts with a valve seat surface provided on a valve seat body, wherein the valve seat body is pressed into the sleeve and, for example, also bears against the bottom portion of the sleeve.
  • the sleeve present as a deep-drawn sheet metal part extends axially over more than half the axial length of the fuel injector.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the axial load on the valve seat body can be reduced in a simple and inexpensive manner by the resilient effect of the segmented base section. In addition, there is an advantageous relief of the weld seams with which the valve seat body is fixed. .-In addition, it is possible to reduce the weight of the valve sleeve and thus the entire fuel injector.
  • a plurality of slots extending from an inner recess are made in the bottom section.
  • four slots spaced apart from one another by 90 ° each run in the bottom section.
  • the slots can be straight or curved, perpendicular to the recess or at a different angle to the recess.
  • valve sleeve by means of sheet metal deep drawing, since this method is simple and inexpensive and the required accuracy is nevertheless achieved.
  • valve sleeve it is advantageous to design the valve sleeve so long that it extends over the entire axial length of the fuel injector.
  • the valve sleeve thus also takes on the function of a fuel inlet connector.
  • FIG. 1 shows a partially illustrated embodiment of a Fuel injector with a valve sleeve according to the invention
  • FIG. 2 is a bottom view of the valve sleeve in accordance with the viewing direction indicated by arrow II in FIG. 1.
  • the electromagnetically actuated valve in the form of an injection valve for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines which is only partially shown in FIG. 1, has as actuator an electromagnetic circuit with a magnet coil 1 and a core (not shown).
  • a coil body 3 receives a winding of the magnet coil 1.
  • the magnet coil 1 is embedded with its coil former 3, for example, in a pot-shaped magnet housing 5 serving as an external pole. Due to this pot-shaped design, the magnet housing 5 with the magnet coil 1 is basically dry. An additional seal is not necessary.
  • the magnet coil 1 itself in turn surrounds an elongated, non-magnetic valve sleeve 6, which extends concentrically to a valve axis 10.
  • the tubular sleeve 6 has a one hand
  • valve sleeve 6 is thus tubular over its entire axial length, but in its entirety together with the base section 12 it is cup-shaped.
  • the valve sleeve 6 largely forms a through opening 13 over its entire axial extent to the bottom section 12 constant diameter.
  • the valve sleeve 6 also surrounds the core, in addition to an armature 14, which is part of an axially movable valve member, for example in the form of a valve needle 15, and further downstream a valve seat body 16
  • Valve sleeve 6 enclosed in the circumferential direction by the sleeve section 11 and in the radial direction by the bottom section 12.
  • the valve sleeve 6 is thus not only a connecting part, but it also fulfills holding, carrier or
  • valve seat body 16 The arranged in the through opening 13 z. B. tubular valve needle 15 has at its downstream, the spray hole 17 facing end a spherical valve closing body 18, on the circumference, for example, five flats 21 are provided for the fuel to be sprayed flowing past.
  • the injection valve is actuated in a known manner, for. B. electromagnetic.
  • Valve needle 15 and thus for opening against the spring force of a return spring 22 or closing the injection valve is used for the electromagnetic circuit.
  • the armature 14 is aligned with the end facing away from the valve closing body 18 to the core.
  • a guide opening 23 of the valve seat body 16 serves to guide the valve closing body 18 during the axial movement of the valve needle 15.
  • the armature 14 is guided in the region of the guide sections 24 in the valve sleeve 6 during the axial movement.
  • the spherical valve closing body 18 interacts with a valve seat surface 25 of the valve seat body 16 that tapers in the shape of a truncated cone in the direction of flow and is formed in the axial direction downstream of the guide opening 23.
  • a valve seat surface 25 of the valve seat body 16 that tapers in the shape of a truncated cone in the direction of flow and is formed in the axial direction downstream of the guide opening 23.
  • On the valve closing body 18 facing away - the valve seat body 16 is concentrically and firmly connected to the spray-perforated disk 17, for example in the form of a shell, for example by a weld seam 26.
  • the thin-walled valve sleeve 6 has been formed, for example, by deep drawing, the material being a non-magnetic material, e.g. B. a rust-resistant CrNi steel is used.
  • the valve sleeve 6 has a central recess 28 with e.g. circular cross-section, which has such a large diameter that the over e.g. four spray openings 29 of the spray-orifice plate 17, which have been injected by eroding or stamping, can leave the injection valve unhindered.
  • FIG. 2 shows a bottom view of the valve sleeve 6 corresponding to the viewing direction indicated by arrow II in Figure 1.
  • the bottom section 12 of the valve sleeve 6 is segmented. Individual segments 30 of the bottom section 12 result from the fact that a plurality of slots 31 are made starting from the central recess 28 and extend at least over half the length of the bottom section 12 between the edge of the recess 28 and the outer transition to the
  • slots 31 spaced apart from one another by 90 ° each extend in the bottom section 12.
  • the slots 31 can, as shown in FIG. 2, be straight and perpendicular to the recess 28, but also arched and / or underneath
  • a weld seam 32 for fixing the valve seat body 16 to the sleeve section 11 of the valve sleeve 6 can be significantly relieved, as a result of which its durability is increased.

Landscapes

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

Abstract

L'invention concerne une soupape d'injection de carburant pour systèmes d'injection de carburant de moteurs à combustion interne, laquelle soupape comprend un manchon (6) de soupape allongé, à déplacement axial, à parois minces et non magnétique. Ce manchon (6) de soupape présente, à son extrémité en aval, une section inférieure (12), largement perpendiculaire à l'extension axiale dudit manchon (6) le long d'un axe longitudinal (10) de ladite soupape. Un pointeau (15) de soupape, solidarisé à un induit (14) et un corps de fermeture (18) de soupape, peut se déplacer axialement dans un orifice de passage (13) du manchon (6). La section inférieure (12) dudit manchon (6) de soupape comprend plusieurs segments (30), par lesquels une décharge axiale du corps (16) de siège de soupape est obtenue. Cette soupape d'injection de carburant s'utilise, en particulier, dans des systèmes d'injection de carburant de moteurs à combustion interne à allumage commandé et compression du mélange.
PCT/DE2002/002695 2001-09-01 2002-07-23 Soupape d'injection de carburant WO2003027489A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001142974 DE10142974B4 (de) 2001-09-01 2001-09-01 Brennstoffeinspritzventil
DE10142974.6 2001-09-01

Publications (1)

Publication Number Publication Date
WO2003027489A1 true WO2003027489A1 (fr) 2003-04-03

Family

ID=7697446

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/002695 WO2003027489A1 (fr) 2001-09-01 2002-07-23 Soupape d'injection de carburant

Country Status (2)

Country Link
DE (1) DE10142974B4 (fr)
WO (1) WO2003027489A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7828232B2 (en) 2005-04-18 2010-11-09 Denso Corporation Injection valve having nozzle hole
CN101581265B (zh) * 2005-04-18 2011-07-20 株式会社电装 燃料喷射阀

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10321148A1 (de) * 2003-05-12 2004-12-02 Robert Bosch Gmbh Brennstoffeinspritzventil

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4643359A (en) * 1985-03-19 1987-02-17 Allied Corporation Mini injector valve
US4646107A (en) 1983-05-21 1987-02-24 Pilot Man-Nen Hitsu Kabushiki Kaisha XY plotter apparatus
WO1991002898A1 (fr) * 1989-08-19 1991-03-07 Robert Bosch Gmbh Soupape d'injection de carburant
DE4310819A1 (de) 1993-04-02 1994-10-06 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils
DE19547406A1 (de) 1995-12-19 1997-06-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19900405A1 (de) * 1999-01-08 2000-07-13 Bosch Gmbh Robert Verfahren zur Montage einer Ventilbaugruppe eines Brennstoffeinspritzventils
US6264112B1 (en) * 1999-05-26 2001-07-24 Delphi Technologies, Inc. Engine fuel injector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946107A (en) * 1988-11-29 1990-08-07 Pacer Industries, Inc. Electromagnetic fuel injection valve
DE19822896A1 (de) * 1998-05-22 1999-11-25 Bosch Gmbh Robert Brennstoffeinspritzventil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646107A (en) 1983-05-21 1987-02-24 Pilot Man-Nen Hitsu Kabushiki Kaisha XY plotter apparatus
US4643359A (en) * 1985-03-19 1987-02-17 Allied Corporation Mini injector valve
WO1991002898A1 (fr) * 1989-08-19 1991-03-07 Robert Bosch Gmbh Soupape d'injection de carburant
DE4310819A1 (de) 1993-04-02 1994-10-06 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils
DE19547406A1 (de) 1995-12-19 1997-06-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19900405A1 (de) * 1999-01-08 2000-07-13 Bosch Gmbh Robert Verfahren zur Montage einer Ventilbaugruppe eines Brennstoffeinspritzventils
US6264112B1 (en) * 1999-05-26 2001-07-24 Delphi Technologies, Inc. Engine fuel injector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7828232B2 (en) 2005-04-18 2010-11-09 Denso Corporation Injection valve having nozzle hole
CN101581265B (zh) * 2005-04-18 2011-07-20 株式会社电装 燃料喷射阀

Also Published As

Publication number Publication date
DE10142974A1 (de) 2003-03-27
DE10142974B4 (de) 2010-04-29

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