EP2541036A1 - Vanne de commande, procédé de fabrication d'une vanne de commande et injecteur de carburant doté d'une vanne de commande - Google Patents

Vanne de commande, procédé de fabrication d'une vanne de commande et injecteur de carburant doté d'une vanne de commande Download PDF

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Publication number
EP2541036A1
EP2541036A1 EP12169074A EP12169074A EP2541036A1 EP 2541036 A1 EP2541036 A1 EP 2541036A1 EP 12169074 A EP12169074 A EP 12169074A EP 12169074 A EP12169074 A EP 12169074A EP 2541036 A1 EP2541036 A1 EP 2541036A1
Authority
EP
European Patent Office
Prior art keywords
valve
switching valve
section
fuel injector
bore
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.)
Withdrawn
Application number
EP12169074A
Other languages
German (de)
English (en)
Inventor
Michael Krause
Lars Olems
Matthias Horn
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.)
Robert Bosch GmbH
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 EP2541036A1 publication Critical patent/EP2541036A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • 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

Definitions

  • the invention relates to a switching valve for controlling an injection valve of a fuel injection device according to the preamble of claim 1. Furthermore, the invention relates to a method for producing a switching valve according to the invention and a fuel injector having a switching valve according to the invention.
  • Such a switching valve is out of DE 10 2010 028 844 A1 the applicant known. It is part of a fuel injector in a common rail injection system and serves to control the lifting movement of a nozzle needle.
  • the switching valve on a valve piece, in which a through hole is formed, which opens into a control chamber. By opening or closing the through hole on the opposite side of the control chamber by means of a valve closing element, the outflow of fuel from the control chamber can be influenced.
  • the known switching valve has a first section, which acts as a throttle section.
  • the throttle section is adjoined by an enlarged diffuser area, which is enlarged in relation to the diameter of the first section, and is adjoined in turn by a flow contour that extends to the valve seat.
  • the known switching valve provides a diffuser region, which tends to reduce the tendency to cavitation by its cross-sectional widening compared to the throttle section.
  • the disadvantage is that the production of the throttle section within the through-bore is relatively complicated, since the throttle section must be formed centrally in the diffuser section, which in turn has a relatively large axial distance to the valve seat area. As a result, the centering of the tool for forming the throttle section is made more difficult.
  • the diffuser section has a certain axial length, which can no longer be used for the formation of the throttle section.
  • the invention has the object, a switching valve according to the preamble of claim 1 such that it can be particularly simple and inexpensive to produce functionally favorable properties.
  • This object is achieved with a switching valve with the features of claim 1, characterized in that adjoins the first, the throttle portion forming portion of the through hole directly the second, reaching to the valve seat portion without connecting the two sections, having a cylindrical portion intermediate portion.
  • the advantage is achieved that can be dispensed with an additional, separate production of the diffuser section, which reduces the manufacturing cost.
  • the diameter of the second section is between 1.0 mm and 1.5 mm, preferably between 1.2 mm and 1.4 mm, and wherein the diameter of the first section is between 0.15 mm and 0, 3mm at a length between 0.5mm and 1.5mm.
  • the switching valve in which the actuation of the valve closing element takes place by means of an electromagnet. This makes it possible to dispense with the piezo actuators also known from the prior art, whereby a relatively inexpensive injection valve can be produced.
  • solenoid valves at the mentioned high operating pressures preferably requires the formation of the switching valve as at least almost pressure-balanced valve.
  • the invention also includes a method for producing a switching valve according to the invention. It is for reasons of high dimensional accuracy and Form accuracy provided that the formation of the first portion by means of an erosion process takes place.
  • the second section is furthermore particularly preferred for the second section to be produced by drilling, laser drilling or electrochemical material processing (ECM). It can thus be used a particularly simple or cost-effective production method that also forms the second section with high accuracy. This possibly also makes it possible to omit the hydroerosive rounding of the A-throttle from the state of the art, which is necessary for setting the flow rate, since methods such as the ECM method enable the production and rounding of the A-throttle in one work step.
  • ECM electrochemical material processing
  • an inventive switching valve 10 is shown as part of a fuel injector 100 for injecting fuel into the combustion chamber of an internal combustion engine. Shown, however, is only a section of the fuel injector 100 in the region of the preferably pressure-balanced switching valve 10.
  • the switching valve 10 is designed as a solenoid valve with an electromagnet 11 for actuating a valve closing element 12.
  • a valve closing element 12 is a cooperating with the electromagnet 11 armature
  • an anchor plate 16 and a sleeve-shaped projection 17 on the anchor plate 16 includes.
  • the sleeve-shaped projection 17 has a conical sealing contour 18, which cooperates with a likewise conical valve seat 20.
  • valve seat 20 results predominantly from a conical elevation 21 of a valve piece 22, so that the valve seat 20 comes to rest outside of the valve piece 22. This simplifies the production of the valve seat 20, since the contours to be machined for the production of the sealing seat are easily accessible.
  • the electromagnet 11 is activated, which causes the serving as a valve closing element 12 armature 15 is moved against the pressing force of the spring element 23 in the direction of the electromagnet 11. In this case, the valve closing element 12 lifts off from the valve seat 20, the switching valve 10 opens.
  • an armature bolt 25 which is at least partially accommodated in the sleeve-shaped projection 17 of the magnet armature 15, is provided which is supported directly or, as shown, indirectly on a housing part 26 of the fuel injector 100.
  • an adjusting plate 27 may be provided for indirect support.
  • the valve member 22 of the switching valve 10 serving to form the valve seat 20 has a central bore 30 which opens into a control chamber 31.
  • fuel can flow out of the control chamber 31 via the bore 30, so that this is relieved of pressure, or a fuel pressure present in the control chamber 31 drops.
  • the bore 30 has for this purpose a throttle 32 which is formed within the bore 30 in the form of a cross-sectional constriction.
  • the bore 30 has a first portion 34 which forms the region of the throttle 32.
  • a second section 35 connects, which extends to the valve seat 20.
  • the first section 34 has a diameter d between 0.15 mm and 0.3 mm, with a length L between 0.5 mm and 1.5 mm.
  • the first section 34 may be, for example, by drilling, Laser drilling or electrochemical material processing (ECM) are formed.
  • the second section 35 has a diameter D between 1.0 mm and 1.5 mm, preferably between 1.2 mm and 1.4 mm, wherein in particular on the basis of Fig. 2 It can be seen that the end 30 of the anchor bolt 25 facing the bore 30 protrudes into the region of the second portion 35. Between the first portion 34 and the second portion 35 of the bore 30 is still a conical transition region 37 is formed, which is generated in particular due to the production of the second portion 35.
  • the switching valve 10 described so far can be modified or modified in many ways, without departing from the spirit.
  • This consists in the formed in the switching valve 10 bore 30, which allows a flow of fuel from the control chamber 31 form such that the throttle 32 forming first portion 34 of the bore 30 is immediately adjacent to the second portion 35, up to the valve seat 20 extends.
  • a diffuser section as in the prior art, is dispensed with.

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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
EP12169074A 2011-06-29 2012-05-23 Vanne de commande, procédé de fabrication d'une vanne de commande et injecteur de carburant doté d'une vanne de commande Withdrawn EP2541036A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110078346 DE102011078346A1 (de) 2011-06-29 2011-06-29 Schaltventil, Verfahren zum Herstellen eines Schaltventils und Kraftstoffinjektor mit einem Schaltventil

Publications (1)

Publication Number Publication Date
EP2541036A1 true EP2541036A1 (fr) 2013-01-02

Family

ID=46168229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12169074A Withdrawn EP2541036A1 (fr) 2011-06-29 2012-05-23 Vanne de commande, procédé de fabrication d'une vanne de commande et injecteur de carburant doté d'une vanne de commande

Country Status (2)

Country Link
EP (1) EP2541036A1 (fr)
DE (1) DE102011078346A1 (fr)

Cited By (2)

* 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
WO2016202488A1 (fr) * 2015-06-16 2016-12-22 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs à combustion interne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016209813A1 (de) 2016-06-03 2017-12-07 Robert Bosch Gmbh Magnetventil und Kraftstoffinjektor mit einem Magnetventil

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005053133A1 (de) * 2005-11-08 2007-05-10 Robert Bosch Gmbh Kavitationsoptimierter Kraftstoffinjektor
DE102007044356A1 (de) * 2007-09-17 2009-03-19 Robert Bosch Gmbh Injektor
DE102007047151A1 (de) * 2007-10-02 2009-04-09 Robert Bosch Gmbh Injektor mit Steuerventilhülse
FR2923406A3 (fr) * 2007-11-08 2009-05-15 Renault Sas Procede d'hydroerosion a double sens d'un trou traversant une paroi metallique.
EP2123898A1 (fr) * 2008-05-21 2009-11-25 Robert Bosch GmbH Injecteur de carburant
US20100282727A1 (en) * 2008-01-17 2010-11-11 Honda Motor Co., Ltd. Laser working apparatus, and laser working method
DE102010028844A1 (de) 2010-05-11 2011-11-17 Robert Bosch Gmbh Schaltventil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005053133A1 (de) * 2005-11-08 2007-05-10 Robert Bosch Gmbh Kavitationsoptimierter Kraftstoffinjektor
DE102007044356A1 (de) * 2007-09-17 2009-03-19 Robert Bosch Gmbh Injektor
DE102007047151A1 (de) * 2007-10-02 2009-04-09 Robert Bosch Gmbh Injektor mit Steuerventilhülse
FR2923406A3 (fr) * 2007-11-08 2009-05-15 Renault Sas Procede d'hydroerosion a double sens d'un trou traversant une paroi metallique.
US20100282727A1 (en) * 2008-01-17 2010-11-11 Honda Motor Co., Ltd. Laser working apparatus, and laser working method
EP2123898A1 (fr) * 2008-05-21 2009-11-25 Robert Bosch GmbH Injecteur de carburant
DE102010028844A1 (de) 2010-05-11 2011-11-17 Robert Bosch Gmbh Schaltventil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016202488A1 (fr) * 2015-06-16 2016-12-22 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs à combustion interne
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
CN105673282B (zh) * 2016-04-08 2018-05-18 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
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