WO2009037095A1 - Soupape de commande pour injecteur de carburant - Google Patents

Soupape de commande pour injecteur de carburant Download PDF

Info

Publication number
WO2009037095A1
WO2009037095A1 PCT/EP2008/061451 EP2008061451W WO2009037095A1 WO 2009037095 A1 WO2009037095 A1 WO 2009037095A1 EP 2008061451 W EP2008061451 W EP 2008061451W WO 2009037095 A1 WO2009037095 A1 WO 2009037095A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
sleeve
guide sleeve
piece
conical
Prior art date
Application number
PCT/EP2008/061451
Other languages
German (de)
English (en)
Inventor
Bernd Streicher
Ralf Nussbaumer
Rudolf Heinz
Michael Mennicken
Holger Rapp
Christian Faltin
Nadja Eisenmenger
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 EP08803434A priority Critical patent/EP2201237B1/fr
Priority to CN2008801073252A priority patent/CN101802384B/zh
Publication of WO2009037095A1 publication Critical patent/WO2009037095A1/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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided

Definitions

  • the invention relates to a force-balanced control valve for controlling a fuel injector of an internal combustion engine according to the preamble of claim 1.
  • a force balanced control valve for a fuel injector is off
  • EP 1 612 403 A1 in which a valve sleeve is axially movably guided on a guide journal of a valve member.
  • the valve sleeve limits one
  • Valve chamber to the outside which is connected to a control chamber of a nozzle needle of the fuel injector via a drain hole.
  • a closing spring By a closing spring, the valve sleeve is pressed against a valve seat formed on the valve seat and thereby closes the valve chamber to the outside.
  • the valve sleeve is moved by an electromagnetic actuator and thereby operated force balanced, d. h. That is exerted on the valve sleeve by the fuel in the valve chamber no resultant force in the direction of movement.
  • the control chamber of the nozzle needle is connected via the valve seat with a low pressure / return system and as a result pressure relieved.
  • Such force-balanced control valves are characterized by the fact that because of the high fuel pressure of over 2000 bar for reasons of strength, a comparatively large valve seat diameter is necessary, otherwise the There is a risk of breakage of the valve piece in the area of the present bore intersections.
  • valve sleeve encloses a separate pressure pin which merely has the task of sealing the valve chamber located inside the valve sleeve in the axial direction upwards.
  • the separation of valve piece and pressure pin eliminates the complicated Bohrungsverschneidungen and thus in particular the high tensile stresses loaded areas of the valve piece. As a result, the
  • Valve seat diameter are designed to be significantly smaller than is the case with the known from EP 1 612 403 Al prior art.
  • valve seat Because of the guide bore located valve seat can only be designed as a flat seat or a concave conical seat, but not as a convex conical seat, the latter seat design for reasons of robustness is advantageous.
  • Object of the present invention is to provide a guide for the valve sleeve with the same accuracy, as is the case with the previous technical solution.
  • the geometry of the guide should allow the valve seat to be freely accessible for machining and coating the surface.
  • Processing identical symmetry axes on the valve piece is aligned by the orientation of the guide sleeve on the conical outer surface of the guide sleeve and thus the valve sleeve centered to the valve seat on the valve piece. It thus eliminates a complex, coordinated machining of guide surface and valve seat surface to ensure that match the axis of symmetry of the guide for the valve sleeve and the axis of symmetry of the valve seat.
  • the valve seat surface for processing and / or coating to the outside protruding and thus freely accessible.
  • a secure self-centering of the guide sleeve is achieved when the guide sleeve with a peripheral edge on the conical outer surface of the
  • the guide sleeve has a conical inner surface, wherein the circumferential edge is formed by an existing between the conical inner surface and a guide bore intersection.
  • a circumferential, circular support of the guide sleeve on the valve piece is achieved when the conical outer surface of the valve piece a cone angle ⁇ and the conical inner surface of the guide sleeve have a cone angle ß, and if the cone angle ß of the conical inner surface is greater than the cone angle ⁇ of the conical outer surface ,
  • the hold-down spring can either be supported on a housing-fixed component or advantageously on the valve sleeve or on the magnet armature. In the latter case, the - A -
  • valve spring force and hold-down spring force acts as a mechanical closing force on the valve seat of the valve sleeve.
  • Connection can be achieved by at least one transverse bore in the guide sleeve and / or by at least one legislativenanschliff on the valve sleeve and / or by at least one outflow hole in the valve piece, which then the Abêtbericht, z. B. also down from the low pressure chamber, can dissipate, be executed.
  • the illustrated control valve-side section of a fuel injector 1 is connected to a common rail system of an internal combustion engine.
  • Rail system includes a return line 2, a reservoir 3, a high-pressure pump 4, a fuel reservoir 5 (common rail) and a fuel supply line. 6
  • the control valve-side section of the fuel injector 1 shows a
  • Valve body 11 a nozzle needle piston 12 of a nozzle needle, not shown, a control valve 13, an electromagnetic actuator 14 and a housing 15 for the actuator 14.
  • the electromagnetic actuator 14 includes a solenoid 43 which is fixed in a receptacle 44 of the housing 15.
  • the valve body 11 is hydraulically tightly inserted in an injector housing, not shown, and separates a low-pressure chamber 17 from a high-pressure chamber 18.
  • the high-pressure chamber 18 is connected to the high-pressure chamber 18, which supplies the high-pressure chamber 18 with system pressure of the high-pressure accumulator 5 by means of the high-pressure pump 4.
  • the low pressure space 17 is on connected to the return line 2, which is acted upon by leak oil pressure and belongs to a Nider horr- / return system.
  • the nozzle needle piston 12 is guided in the valve body 11 and exposed to a pressure surface 21 a control chamber 20. From the high-pressure chamber 18, an inlet bore 23 with an inlet throttle leads into the control chamber 20.
  • the control valve 13 comprises a valve piece 25, a valve sleeve 30 and a guide sleeve 50.
  • the valve piece 25 is integrally connected to the valve body 11.
  • the valve piece 25 is formed with a first conical portion 26, a second conical portion 27 and a coaxial cylindrical recess 37.
  • the first conical section 26 forms a conical outer surface 28 at an angle ⁇ .
  • the second conical section 27 forms a conical valve seat surface 29.
  • the valve sleeve 30 has a plate-shaped armature 31, a receiving bore 32, an end-face annular surface 33 and a Au 88.f 34.
  • a push rod 35 is accommodated, which is supported on the housing 15 of the actuating element 14.
  • the push rod 35 has a valve seat-side end face 36.
  • Ring surface 33 extends conically, so that it cooperates with a sealing edge with the conical valve seat surface 29 of the valve member 25 and forms a valve seat 38 with this.
  • a valve chamber 40 which is hydraulically connected via a bore 41 with an outlet throttle 42 with the control chamber 20.
  • the control valve 13 is a pressure-balanced in the axial direction servo valve.
  • the guide sleeve 50 has a guide bore 51 in which the Au OWgroupsf pool 34 of the valve sleeve 30 is guided.
  • the guide sleeve 50 is on a valve piece 25 facing end face with a conical Inner surface 52 executed with a cone angle ß.
  • the cone angle ß of the conical inner surface 52 is slightly larger than the cone angle ⁇ of the conical outer surface 28 of the conical portion 26 of the valve piece 25.
  • the intersection between the conical inner surface 52 and the guide bore 51 forms a circular edge 54, with which the guide sleeve 50 rests on the conical outer surface 28 of the valve piece 25.
  • the guide sleeve 50 is aligned coaxially and parallel to the axis of the conical section 26 on the valve piece 25. Since the conical portion 26 and the valve seat 38 forming conical valve seat surface 29 have the same axis of symmetry, the valve sleeve 30 is aligned with the front side annular surface 33 coaxially with the conical valve seat surface 29 of the valve member 25 by the leadership of the valve sleeve 30 in the guide sleeve 50. As a result, the valve seat 38 is present between the valve sleeve 30 and the valve piece 25 as a closed, circumferential line support.
  • valve sleeve 30 and guide sleeve 50 an annular space 55 is further arranged, which is connected via a guided through the guide sleeve bore 50 56 with the low-pressure chamber 17.
  • the executed as a hydraulic connection bore 56 can also by means of a mecanicnanschliffs on the valve sleeve 30 or by at least one
  • one or more radially extending grooves may be provided in the conical inner surface 52.
  • the valve sleeve 30 is biased by a first closing spring 46 in the closing direction of the valve seat 38 against the conical annular surface 29.
  • the guide sleeve 50 is pressed against the valve piece 25 by means of a second hold-down spring 47, which is supported for example on the valve sleeve 30.
  • the force of the closing spring 46 is greater than the pressing force of the hold-down spring 47, because the mechanical closing force for the valve seat 38 results from the difference of the spring forces of closing spring 46th and hold-down spring 47.
  • the actuator 14 is actuated by the armature 31 is pulled to the solenoid 43. In this case, the valve sleeve 30 moves in the axial direction upwards and the valve seat 38 is released. This creates a hydraulic connection between the valve chamber 40 and the low-pressure chamber 17 via the annular space 55 and the
  • the nozzle needle lifts from the nozzle needle seat and fuel is injected with the system pressure of the fuel high pressure accumulator 6 in the combustion chamber of the internal combustion engine.

Landscapes

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

Abstract

L'invention concerne une soupape de commande (13) pour commander un espace de commande (20) d'un injecteur de carburant, cette soupape comportant une pièce de soupape (25) et une douille de soupape (30). La douille de soupape (30) est guidée de façon axialement mobile et exerce une pression, avec une force de fermeture, contre un siège de soupape (38) formé sur la pièce de soupape (25). La surface périphérique externe (34) de la douille de soupape (30) est guidée dans un manchon de guidage (50), qui est un élément séparé de la pièce de soupape (25). Un ressort de retenue (47) agit sur le manchon de guidage (50), de telle sorte que le manchon de guidage (50) repose, en étant autocentré par rapport à l'axe d'une surface extérieure conique (28), sur la pièce de soupape (25).
PCT/EP2008/061451 2007-09-17 2008-09-01 Soupape de commande pour injecteur de carburant WO2009037095A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08803434A EP2201237B1 (fr) 2007-09-17 2008-09-01 Soupape de commande pour injecteur de carburant
CN2008801073252A CN101802384B (zh) 2007-09-17 2008-09-01 用于燃料喷射器的控制阀

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007044361.9 2007-09-17
DE200710044361 DE102007044361A1 (de) 2007-09-17 2007-09-17 Steuerventil für einen Kraftstoffinjektor

Publications (1)

Publication Number Publication Date
WO2009037095A1 true WO2009037095A1 (fr) 2009-03-26

Family

ID=39940585

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/061451 WO2009037095A1 (fr) 2007-09-17 2008-09-01 Soupape de commande pour injecteur de carburant

Country Status (4)

Country Link
EP (1) EP2201237B1 (fr)
CN (1) CN101802384B (fr)
DE (1) DE102007044361A1 (fr)
WO (1) WO2009037095A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2201240B1 (fr) * 2007-09-17 2012-12-19 Robert Bosch GmbH Injecteur
CN103003559A (zh) * 2010-07-19 2013-03-27 罗伯特·博世有限公司 具有液压耦合器单元的燃料喷射器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009026774A1 (de) * 2009-06-05 2010-12-09 Robert Bosch Gmbh Schaltventil
DE102009046563A1 (de) * 2009-11-10 2011-05-12 Robert Bosch Gmbh Kraftstoffinjektor
DE102015205161A1 (de) * 2015-03-23 2016-09-29 Robert Bosch Gmbh Ventil für eine Kraftstoffeinspritzkomponente
DE102017208270A1 (de) * 2017-05-17 2018-11-22 Robert Bosch Gmbh Förderaggregat

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612403A1 (fr) 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Soupape servo pour controller l'injecteur d'un moteur à combustion interne
DE102006021741A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil
DE102006021736A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil
EP1939441A2 (fr) * 2006-12-21 2008-07-02 Robert Bosch Gmbh Injecteur de carburant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1486665A4 (fr) * 2002-03-15 2010-09-01 Bosch Automotive Systems Corp Injecteur de combustible
DE10326259A1 (de) * 2003-06-11 2005-01-05 Robert Bosch Gmbh Injektor für Kraftstoff-Einspritzsysteme von Brennkraftmaschinen, insbesondere von direkteinspritzenden Dieselmotoren
DE102004005451A1 (de) * 2004-02-04 2005-08-25 Robert Bosch Gmbh Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE102007022586A1 (de) 2007-05-14 2008-11-27 Robert Bosch Gmbh Injektor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612403A1 (fr) 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Soupape servo pour controller l'injecteur d'un moteur à combustion interne
DE102006021741A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil
DE102006021736A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil
EP1939441A2 (fr) * 2006-12-21 2008-07-02 Robert Bosch Gmbh Injecteur de carburant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2201240B1 (fr) * 2007-09-17 2012-12-19 Robert Bosch GmbH Injecteur
CN103003559A (zh) * 2010-07-19 2013-03-27 罗伯特·博世有限公司 具有液压耦合器单元的燃料喷射器

Also Published As

Publication number Publication date
CN101802384B (zh) 2012-07-11
CN101802384A (zh) 2010-08-11
EP2201237A1 (fr) 2010-06-30
EP2201237B1 (fr) 2012-11-21
DE102007044361A1 (de) 2009-03-19

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