EP2935862A1 - Composant d'un système d'injection de carburant - Google Patents

Composant d'un système d'injection de carburant

Info

Publication number
EP2935862A1
EP2935862A1 EP13805336.8A EP13805336A EP2935862A1 EP 2935862 A1 EP2935862 A1 EP 2935862A1 EP 13805336 A EP13805336 A EP 13805336A EP 2935862 A1 EP2935862 A1 EP 2935862A1
Authority
EP
European Patent Office
Prior art keywords
component
valve
component according
alloy layer
closing body
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Withdrawn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
EP13805336.8A
Other languages
German (de)
English (en)
Inventor
Bastian MANCK
Jochen Straehle
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 EP2935862A1 publication Critical patent/EP2935862A1/fr
Withdrawn legal-status Critical Current

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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
    • 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
    • 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
    • F02M63/0077—Valve seat details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • 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
    • F02M2200/05—Fuel-injection apparatus having means for preventing corrosion
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals

Definitions

  • the invention relates to a component of a fuel injection system comprising at least two metallic subcomponents.
  • corrosive processes usually contribute to the wear of the subcomponents. These corrosive processes occur due to the different chemical potentials of the metals used in the subcomponents. The potential differences of the individual subcomponents occurring in this case exert a force on the molecules on the respective surrounding medium which, for example, may be the so-called common rail injectors of the fuel flowing through the injection valves used there or of the oxygen present in the external environment of the medium, which eventually initiate a corrosive decomposition process that leads to unwanted and premature wear of the component.
  • the component having the characterizing features of claim 1 has the advantage that the component has a higher corrosion resistance compared to the prior art and thus a longer life by means are provided which impart a potential difference to the two component parts of the component, the inherent potential difference counteracts between the two sub-components to compensate for the different energy levels due to the different metals used in the sub-components.
  • both subcomponents are in electrochemical operative connection with each other and the potential difference compensating means for imposing a potential difference comprise one Measure of the invention, applied to the surface of only one of the sub-components layer, which consists of an electrochemically base metal or alloy compared to the metal forming the corresponding sub-component.
  • the alloy layer may be arranged in a section of the subcomponent which is outside the mechanical action range of the other subcomponent, which is preferably designed to be movable and, for example, at periodically or nonperiodically occurring intervals comes into mechanical contact with the adjacent and immovable executed second subcomponent within the intended action area.
  • the means for impressing a potential difference may comprise an external voltage source which is connected to two component parts of the component which are directly or indirectly in contact with one another in order to substantially cancel out the potential difference inherent between the two component parts of the component in that, on the one hand, the external voltage source is connected to one subcomponent and, on the other hand, to the other subcomponent which is in mechanical and / or electrochemical contact with it is electrically connected, wherein the voltage generated by the external voltage source is set so that it counteracts acting between the two subcomponents inherent potential difference in size and polarity.
  • the means comprise a sacrificial anode embedded in one of the subcomponents, wherein the sacrificial anode consists of a subcomponent associated with the sacrificial anode and the respective subunit form each subcomponent, electrochemically less noble metal is formed.
  • An embodiment of the invention in which the component of the fuel injection system is designed as a valve, wherein the first subcomponent is designed as a valve funnel and the second subcomponent as a closing body movably received in the valve funnel, has the advantage that the tendency to corrosion and thus the wear in the contact area between the usually hard chrome-coated valve seat of the valve funnel and the vertically movably received in the valve hopper closing body on these wear-prone valve member components can be reduced.
  • the layer is applied to the surface of the valve funnel and is arranged on a portion of the valve funnel, which is above the direct mechanical action range of the closing body, wherein the layer is formed of a comparison with the valve funnel in electrochemical respects unedleren alloy ,
  • this layer is not directly exposed to the direct mechanical stress due to the closing movement of the closing body taking place on the valve seat in the foot region of the valve funnel.
  • the alloy layer may expediently be arranged in a ring-like manner as a section running around on the surface of the valve funnel such that the alloy layer is outside the mechanical action range of the closing body seated in the valve seat of the valve funnel during its closing state
  • Closing body is arranged.
  • the layer may alternatively be applied to the surface of a shank region of the movably embodied closing body and is therefore located outside the part of the closing body which is mechanically stressed during the closing process. It is the Layer formed from a relative to the respective closing body and the valve funnel forming metals or alloys electrochemically lower noble metal.
  • the component of the fuel injection system is designed as a rolling bearing, wherein the first sub-component as running on an outer surface of a cam roller and the second sub-component are designed as cams, has the advantage that the tendency to corrosion and thus the wear between - See cam and roller, which are designed to be movable, can be reduced.
  • the sacrificial anode is embedded in the roll, wherein the sacrificial anode is formed of a metal or an alloy, which / which is formed electrochemically less noble than the respective cams and the roller forming metals.
  • the embedded in the role sacrificial anode is cylindrical and coaxial with the roller rotational axis extending through hole of the roller is embedded or incorporated in the role, so that the sacrificial anode is not directly exposed to the natural abrasion of the tread of the role and this is due to the embedding in the role in electrochemical Wrkutton with this sub-component.
  • FIG. 1 shows a component designed as a valve according to a first embodiment in a perspective view, wherein a ring-shaped sacrificial anode coating is arranged in a valve funnel of the valve,
  • FIG. 2 a perspective view of a component designed as a valve according to a second embodiment with a closing body made of a first metal and a valve funnel made of a second metal, wherein the closing body has a sacrificial anode layer made of a third metal which surrounds in an annular manner on the surface of its shank region,
  • valve 3 shows a valve designed as a component according to a third embodiment with a valve funnel and a closing body in section, wherein the valve funnel is formed of a first metal and the closing body of a second metal and between the valve funnel and the closing body is applied an external DC voltage,
  • FIG. 4 is a component designed as a rolling bearing according to a first embodiment in a perspective partial section with a cam formed from a first metal and a second metal formed roller as subcomponents, wherein the roller has a sacrificial anode of a third metal, and
  • Fig. 5 is a designed as a rolling bearing component according to a second embodiment in a part section held in section with a cam, a roller and an outer body as subcomponents, wherein between the outer body and the cam is applied an external DC voltage.
  • Fig. 1 shows a component 100 according to a first embodiment, which is designed as a valve.
  • the valve 100 is suitable, for example, as an injection valve for use in a fuel! njektor.
  • the valve 100 has a substantially conical funnel 1 10, wherein in the valve funnel 1 10 centrally a valve seat 120 is formed.
  • the valve seat 120 serves as a contact area for a closing body, not shown in FIG. 1, which either closes and releases the valve seat 120 depending on its position.
  • a sacrificial anode 140 is arranged, which is formed there as annular surface on the Ventiltrichterober Structure surface coating.
  • the surface coating is made of a metal or a metal compound or alloy which is less noble than the metal forming the valve 100.
  • Fig. 2 shows the component 100 according to a second embodiment, which is designed as a valve.
  • the valve 100 has a valve funnel 110, wherein in the valve funnel 1 10 centrally a valve seat 120 is formed, into which a channel 170 opens.
  • the valve seat 120 is closed when the closing body 160 with its ball-shaped end section 161 rests on the valve seat 120 at the foot of the valve funnel 110 and thereby closes the channel 170, and opened when the spherical end section 161 of the closing body 160 leaves the valve seat 120 free and thereby the channel 170 releases.
  • the closing body 160 is formed of a first metal
  • the valve horn 110 is formed of a second metal.
  • a sacrificial anode 140 is provided as potential difference compensation means, which is applied outside the spherical end section 161 of the closing body 160 as an annular coating in the shaft region 162 of the closing body 160 on the surface of the shaft region 162 in order to detect the potential difference between the closing body 160 and the valve funnel 1 10 compensate or compensate, which results due to the different chemical potentials of the two underlying different metals or metal compounds.
  • the alloy layer is formed of a third metal, which is less noble compared to the first and second metal, which respectively form the closing body 160 and the valve piece, to exchange electrons between the first and second metal and the closing body 160 and the valve piece largely to prevent.
  • valve 100 has a conical valve funnel 10, wherein in the valve funnel 10, a valve seat 120 is centrally formed, into which a channel 170 opens.
  • a closing body 160 is movably held, so that the valve seat 120 is closed when the closing body 160 is seated with its spherical end portion 161 on the valve seat 120 and thereby closes the passage 170, and is open when the spherical end portion 161 of the closing body 160 is released from the valve seat 120 and thereby releases the channel 170.
  • the closing body 160 is formed of a first metal
  • the valve funnel 110 of the valve 100 is formed of a second metal.
  • an external DC voltage source 141 is provided as potential difference compensation means, which is connected with its one pole via an electrical line 142 to the closing body 160 and with its other pole via a further electrical line 143 to the valve funnel 1 10 by the potential difference between or compensate for closing body 160 and valve funnel 110, which results due to the different chemical potentials of the two underlying different metals.
  • the electrical voltage of the voltage source connected to the sub-components is selected or set in accordance with the difference between the chemical potentials inherent in the different metals, which respectively form the relevant sub-components, ie closing body and valve funnel. Under the respective chemical potential is essentially to understand the normal voltage of a chemical element within the electrochemical series of the chemical elements.
  • the rolling bearing 200 has a roller 210 formed of a first metal as a rolling element and a cam 230 formed of a second metal, wherein the roller 210 is guided on the surface of the cam 230.
  • a potential difference compensation means a cylindrically shaped sacrificial anode 240 is provided, which is received axially in a running along the roller axis of rotation through hole of the roller 210 and is formed of a third metal to compensate for the potential difference between roller 210 and cam 230 and compensate each other due to the different chemical potentials of the two underlying different metals.
  • the cylindrical sacrificial anode is in electrically conductive contact with the due the through-hole hollow cylindrical roller 210; Further, the sacrificial anode is formed of a less noble metal or alloy, which is less noble compared to the first and second metal, which each form the roller 210 and the cam, to electron exchange between the first and second metal or To largely prevent the roller 210 and the cam.
  • the rolling bearing 200 has a roller 210 formed of a first metal as a rolling element and an outer body 220 functioning as a roller shoe, and a cam 230 formed of a second metal, the roller 210 being interposed between the outer body 220 and the cam 230.
  • an external DC voltage source 241 is provided, which is applied with its one pole via an electrical line 242 to the outer body 220 and with its other pole via an electrical line 243 to the cam 230 to the potential difference between role and cams compensate.
  • the electrical voltage of the voltage source connected to the subcomponents is selected or set in accordance with the difference between the chemical potentials inherent in the different metals, which respectively form the relevant subcomponents, ie cams and rollers. Under the respective chemical potential is essentially to understand the normal voltage of a chemical element within the electrochemical series of the chemical elements.

Landscapes

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

Abstract

L'invention concerne un composant (100) pourvu d'au moins deux parties métalliques. Selon l'invention, avec une soupape (100) en tant que composant, une couche d'alliage (140) est appliquée sur la surface d'un entonnoir de soupape (110) fonctionnant comme une partie de composant, la couche d'alliage (140) étant constituée d'un métal commun par rapport à l'entonnoir de soupape (110). La couche d'alliage (140) est disposée sur une section de l'entonnoir de soupape (110), laquelle se situe à l'extérieur de la zone d'action mécanique directe (150) du corps de fermeture (160) fonctionnant comme une deuxième partie de composant, et laquelle est disposée, en tant que section présente sur toute la périphérie annulaire de la surface de l'entonnoir de soupape (110), à l'extérieur de la zone d'action mécanique du corps de fermeture (160) par rapport au corps de fermeture (160) reposant dans le siège de soupape (120) de l'entonnoir de soupape pendant son état de fermeture.
EP13805336.8A 2012-12-21 2013-12-10 Composant d'un système d'injection de carburant Withdrawn EP2935862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210224269 DE102012224269A1 (de) 2012-12-21 2012-12-21 Komponente eines Kraftstoffeinspritzsystems
PCT/EP2013/076112 WO2014095497A1 (fr) 2012-12-21 2013-12-10 Composant d'un système d'injection de carburant

Publications (1)

Publication Number Publication Date
EP2935862A1 true EP2935862A1 (fr) 2015-10-28

Family

ID=49765492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13805336.8A Withdrawn EP2935862A1 (fr) 2012-12-21 2013-12-10 Composant d'un système d'injection de carburant

Country Status (5)

Country Link
EP (1) EP2935862A1 (fr)
CN (1) CN104870804A (fr)
DE (1) DE102012224269A1 (fr)
RU (1) RU2015129632A (fr)
WO (1) WO2014095497A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017220712A1 (de) 2017-11-20 2019-05-23 Robert Bosch Gmbh Verfahren zur Herstellung einer Komponente
JP2019100207A (ja) * 2017-11-29 2019-06-24 株式会社デンソー 燃料噴射弁

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1003525B (zh) * 1986-05-21 1989-03-08 华东输油管理局 架空金属管道的阴极保护装置
CN2623699Y (zh) * 2002-12-13 2004-07-07 颜民 不同金属体的恒电位差外加电流防腐蚀装置
CN100573025C (zh) * 2004-12-13 2009-12-23 贝洱两合公司 用于含酸气体热交换的装置
CN200952439Y (zh) * 2006-09-24 2007-09-26 方林焱 耐醇电子喷射燃油泵
CN101260526B (zh) * 2008-03-10 2013-07-24 中国人民解放军海军装备技术研究所 复合电位电偶腐蚀控制技术
DE102010003886A1 (de) * 2010-04-13 2011-10-13 Robert Bosch Gmbh Hochdruckpumpe
DE102012205699A1 (de) * 2012-04-05 2013-10-10 Robert Bosch Gmbh Kraftstoffinjektor, insbesondere Common-Rail-Injektor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014095497A1 *

Also Published As

Publication number Publication date
CN104870804A (zh) 2015-08-26
WO2014095497A1 (fr) 2014-06-26
DE102012224269A1 (de) 2014-06-26
RU2015129632A (ru) 2017-01-27

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