WO2009021864A1 - Soupape pilote pour injecteur de carburant - Google Patents

Soupape pilote pour injecteur de carburant Download PDF

Info

Publication number
WO2009021864A1
WO2009021864A1 PCT/EP2008/060166 EP2008060166W WO2009021864A1 WO 2009021864 A1 WO2009021864 A1 WO 2009021864A1 EP 2008060166 W EP2008060166 W EP 2008060166W WO 2009021864 A1 WO2009021864 A1 WO 2009021864A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
control
valve
guide pin
pin
Prior art date
Application number
PCT/EP2008/060166
Other languages
German (de)
English (en)
Inventor
Bernd Streicher
Ralf Nussbaumer
Rudolf Heinz
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
Publication of WO2009021864A1 publication Critical patent/WO2009021864A1/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
    • 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
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • 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
    • F02M63/0043—Two-way valves
    • 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
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F02M63/0073—Pressure balanced valves
    • 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
    • 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

Definitions

  • the invention relates to a force-balanced control valve for a
  • Fuel injector of an internal combustion engine having the features of the preamble of claim 1.
  • a force-balanced control valve for a fuel injector is known from EP 1 612 403 A1, in which a control sleeve is guided axially movably on a valve body.
  • the control sleeve defines a 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 control sleeve is pressed against a valve seat formed on the valve body and thereby closes the valve chamber to the outside.
  • the control sleeve is moved by an electromagnetic actuator and thereby operated without force, that is, is exerted on the control 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 to a low-pressure / return system and as a result pressure-relieved.
  • Valve element is designed so that the resulting effective area over which the fuel pressure in the annular chamber acts on the control sleeve is equal to zero, so that the pressure exerted no opening or closing forces on the valve element. Due to the fact that the high-pressure fuel of a common rail of a Diesel injection system is provided, must be guided through the interior of the valve member in the valve chamber, the miniaturization of such a control valve limits. For example, with switchable pressures above 2000 bar only valve seat diameter of more than 2.5 mm can be realized, otherwise the risk of breakage of the valve piece in the
  • the object of the present invention is to avoid the occurrence of tensile stresses in the region of the bore intersections of the valve piece by a simple measure.
  • the object of the invention is achieved with the characterizing measures of claim 1.
  • the pressure threshold strength of the valve member is increased in the region of the guide pin. This makes it possible to further reduce the seat diameter of the valve seat and / or the
  • the pressing biasing force is expediently applied by means of a pressure pin, which acts on the guide pin.
  • the pressure pin is arranged between an abutment connected to a holding body and the guide pin.
  • the pressure pin is connected as a one-piece component with the guide pin.
  • the pressure pin between a valve seat facing away from the end face on the guide pin and the abutment formed on the holding body is arranged as a separate component.
  • the pressing biasing force is applied by an elastic spring element is arranged between the pressure pin and abutment and / or between the guide pin and pressure pin.
  • the elastic spring element may be designed as a plate spring or as a plate spring package. However, the elastic spring element can also be designed by an elastically formed pressure pin and / or by an elastically formed abutment.
  • FIG. 1 shows a cross section through a part of a fuel injector with a
  • FIG. 2 shows a cross section through a part of a fuel injector with a control valve.
  • FIG. 1 and 2 a control valve side section of a fuel injector for a common rail system of a diesel injector is shown in section.
  • the detail of the fuel injector shows an injector housing 10, a valve body 11, a valve 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 valve body 11 is inserted hydraulically tight in the injector 10 and has a guide portion 17 for the valve piston 12 and a valve piece 18 for the control valve 13.
  • a control chamber 20 is further formed, to which the valve piston 12 of the nozzle needle is exposed with a control surface 21.
  • an annular high-pressure chamber 22 is formed in the one
  • High-pressure bore 23 opens, which is hydraulically connected to a high pressure port 24 which is connected to the common rail system, not shown. From the high-pressure chamber 22, an inlet bore 25 with an inlet throttle leads into the control chamber 20. - A -
  • the valve piece 18 has a guide pin 30, on which a control sleeve 31 is guided axially displaceably with a guide bore 32.
  • the control sleeve 31 is further designed with a plate-shaped portion 33.
  • the control sleeve 31 acts with a sealing surface on a formed on the valve piece 18 valve seat 35 a.
  • valve chamber 36 is formed.
  • the valve chamber 36 is designed as an annular groove.
  • the control sleeve 31 is surrounded by a low-pressure chamber 37, which is connected to a pressurized with leak oil pressure, not shown, low pressure / return system.
  • a closing spring 38 acts on the control sleeve 31, so that the control sleeve 31 with the sealing surface against the
  • Valve seat 35 is held in the closed position.
  • valve piece 18 extending in the axial direction of the riser 41 and one of them, for example, radially branched transverse bore 42 are arranged, which connects the riser 41 with the valve chamber 36.
  • control chamber 20 is hydraulically connected to the valve chamber 36.
  • the adjusting element 14 which is for example a magnetic actuator, comprises a magnetic core 45 with a magnetic coil 46, which acts on a magnet armature 47.
  • the armature 47 is thereby formed by the plate-shaped portion 33 of the control sleeve 31.
  • the magnetic core 45 is fixed in the housing 15. In the magnetic core 45, a through hole 48 is formed.
  • the guide pin 30 is extended in the axial direction with a pressure pin 50, wherein the pressure pin 50 is biased with an end face 51 by means of a spring element, such as a plate spring 52 against an abutment 53.
  • a spring element such as a plate spring 52 against an abutment 53.
  • Abutment 53 is formed by a holding body 54, which also fixes the magnetic core 47.
  • the pressure pin 50 protrudes through the through hole 48 formed in the magnetic core 47.
  • the pressure pin 50 is designed with respect to its diameter so that it fits without contact through the inner diameter of the closing spring 38.
  • the pressure pin 50 is designed as a separate component 55 which is seated with a valve seat side end face 56 on an end face 57 of the guide pin 30.
  • FIG. 1 A second embodiment is shown in FIG. Here is the same
  • Pressure pin 50 designed as a formed on the guide pin 30 component 59, so that guide pin 30 and push pin 50 form a one-piece component.
  • a pressing biasing force F is induced in the axial direction in the guide pin 30.
  • the biasing force F should be on the order of magnitude of the force at which the portions of the valve member 18 located above and below the bore bore 40 and transverse bore 42 are pulled apart by the hydraulic pressure in the riser 41 and the transverse bore 42.

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 pilote pour la commande de l'espace pilote (20) d'un injecteur de carburant, qui présente une douille pilote (32) guidée à déplacement axial sur un tourillon de guidage (30). Le tourillon de guidage (30) est sollicité par une force de précontrainte en poussée F et une tige de poussée (50) est prévue pour appliquer la force de précontrainte en poussée F sur le tourillon de guidage (30).
PCT/EP2008/060166 2007-08-14 2008-08-01 Soupape pilote pour injecteur de carburant WO2009021864A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007038394.2 2007-08-14
DE200710038394 DE102007038394A1 (de) 2007-08-14 2007-08-14 Steuerventil für einen Kraftstoffinjektor

Publications (1)

Publication Number Publication Date
WO2009021864A1 true WO2009021864A1 (fr) 2009-02-19

Family

ID=39870524

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/060166 WO2009021864A1 (fr) 2007-08-14 2008-08-01 Soupape pilote pour injecteur de carburant

Country Status (2)

Country Link
DE (1) DE102007038394A1 (fr)
WO (1) WO2009021864A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105673282A (zh) * 2016-04-08 2016-06-15 龙口龙泵燃油喷射有限公司 压力平衡阀式共轨喷油器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009046563A1 (de) * 2009-11-10 2011-05-12 Robert Bosch Gmbh Kraftstoffinjektor

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030106533A1 (en) * 2001-12-11 2003-06-12 Cummins Ins. Fuel injector with feedback control
EP1612405A1 (fr) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Système d'injection de carburant pour moteur à combustion interne
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
EP1657435A1 (fr) * 2004-11-12 2006-05-17 C.R.F. Società Consortile per Azioni Injecteur de combustible pour moteur à combustion interne
EP1707798A1 (fr) * 2005-03-14 2006-10-04 C.R.F. Societa' Consortile per Azioni Soupape de dosage asservie réglable pour un injecteur de carburant ainsi que sa méthode de réglage
DE102006050812A1 (de) * 2006-10-27 2008-04-30 Robert Bosch Gmbh Kraftstoffinjektor
DE102006055548A1 (de) * 2006-11-24 2008-05-29 Robert Bosch Gmbh Kraftstoffinjektor
EP1961950A1 (fr) * 2007-02-26 2008-08-27 Robert Bosch Gmbh Injecteur de carburant doté d'un poste d'étranglement supplémentaire destiné à éviter la formation de gaz dans des volumes de commande de la vanne de commande
DE102007009165A1 (de) * 2007-02-26 2008-08-28 Robert Bosch Gmbh Kraftstoffinjektor mit einer zusätzlichen Ablaufdrossel oder mit einer verbesserten Anordnung derselben im Steuerventil

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030106533A1 (en) * 2001-12-11 2003-06-12 Cummins Ins. Fuel injector with feedback control
EP1612405A1 (fr) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Système d'injection de carburant pour moteur à combustion interne
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
EP1657435A1 (fr) * 2004-11-12 2006-05-17 C.R.F. Società Consortile per Azioni Injecteur de combustible pour moteur à combustion interne
EP1707798A1 (fr) * 2005-03-14 2006-10-04 C.R.F. Societa' Consortile per Azioni Soupape de dosage asservie réglable pour un injecteur de carburant ainsi que sa méthode de réglage
DE102006050812A1 (de) * 2006-10-27 2008-04-30 Robert Bosch Gmbh Kraftstoffinjektor
DE102006055548A1 (de) * 2006-11-24 2008-05-29 Robert Bosch Gmbh Kraftstoffinjektor
EP1961950A1 (fr) * 2007-02-26 2008-08-27 Robert Bosch Gmbh Injecteur de carburant doté d'un poste d'étranglement supplémentaire destiné à éviter la formation de gaz dans des volumes de commande de la vanne de commande
DE102007009165A1 (de) * 2007-02-26 2008-08-28 Robert Bosch Gmbh Kraftstoffinjektor mit einer zusätzlichen Ablaufdrossel oder mit einer verbesserten Anordnung derselben im Steuerventil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105673282A (zh) * 2016-04-08 2016-06-15 龙口龙泵燃油喷射有限公司 压力平衡阀式共轨喷油器

Also Published As

Publication number Publication date
DE102007038394A1 (de) 2009-02-19

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