EP2021616A1 - Magnetventil mit geflutetem ankerraum - Google Patents
Magnetventil mit geflutetem ankerraumInfo
- Publication number
- EP2021616A1 EP2021616A1 EP07726781A EP07726781A EP2021616A1 EP 2021616 A1 EP2021616 A1 EP 2021616A1 EP 07726781 A EP07726781 A EP 07726781A EP 07726781 A EP07726781 A EP 07726781A EP 2021616 A1 EP2021616 A1 EP 2021616A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- face
- armature
- fuel injector
- magnetic yoke
- solenoid valve
- 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.)
- Granted
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
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0019—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of electromagnets or fixed armatures
-
- 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
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
-
- 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
-
- 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
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/308—Fuel-injection apparatus having mechanical parts, the movement of which is damped using pneumatic means
Definitions
- DE 199 50 861 A1 relates to a solenoid valve. It is disclosed a solenoid valve, the armature is formed in several parts and has an armature plate and an anchor bolt. The anchor bolt is guided in a slider. In order to avoid ringing of the armature disk after closing the solenoid valve, a damping device is provided on the armature. With such a damping device exactly the required short switching times of the solenoid valve can be maintained.
- the solenoid valve is intended for use in injection systems with high-pressure accumulator injection systems (common rail) on self-igniting internal combustion engines.
- a magnetic actuator for actuating a fuel injector comprises a magnetic core, in which a magnetic coil is accommodated.
- a closing spring acts on the armature in the closing direction.
- an exit slit for an actuating fluid is formed between an armature facing side of a stop sleeve and the armature.
- the outlet gap opens into a hydraulic damping chamber, which is delimited by an end face of the magnet armature and by a damping surface made of non-magnetic material.
- the residual air gaps of the magnetic circuits are designed very small to realize extremely short switching times.
- the residual air gap is the distance between a magnetic yoke and the armature after its actuation.
- the fuel which passes due to the pressure relief of a control chamber, for example, in the resulting cavity between the yoke (magnetic core) and the armature is displaced by the very fast switching operation and tends due to the high Abfi foiieri, for vapor bubble formation, ie for cavitation.
- the vapor bubbles break down, which leads to a high mechanical load, in extreme cases even to cavitation erosion, of the components which are exposed to the high pressures are, who adjust to the sudden implosion of the vapor bubbles.
- the resulting in the cavitation erosion damage of the components cause the set stroke of an armature assembly is impaired within a solenoid valve, so that it comes to inaccurate, undefined strokes of the armature assembly upon energization of the solenoid of the solenoid valve, which in turn leads to scattering in the combustion chamber injected fuel quantity leads.
- the present invention has for its object to provide a structural design of a solenoid valve, which avoids damage to the components of a solenoid valve by Kavitationserosion.
- the contour of either a magnetic yoke of the solenoid valve or the contour of an end face of the armature assembly opposite the magnet yoke is designed so that a large volume of kavitationi- onserosionskritica bodies and a small volume cavitation erosionsunkritica points in the cavity, d. H. in the air gap between the armature and the magnetic yoke of the solenoid valve.
- the design of the contours either on the armature opposite end face of the magnetic yoke or on the magnet yoke opposite end side of the armature assembly does not affect the magnetic properties of the solenoid valve, in particular the magnetic flux.
- the residual air gap which adjusts in the energized state of the magnetic yoke between the end face and the end face of the armature assembly, at the edge of the end face of the armature assembly or at the edge of Magnet yokes are designed to be smaller than in the middle. This results in a smaller gap width within the edge region between the end face of the magnetic yoke and the end face of the armature assembly, whereby the flow rate of the fuel from the Cavity between yoke and armature at the end of Ankerhubterrorism throttled, that is slowed down and the Kavitationsne Trent is significantly reduced.
- Detail Z is an enlarged view of the cavity between an end face of the magnetic yoke and the end face of the armature opposite the magnet yoke,
- Figure 2 shows a first embodiment of the end face of the anchor in plan trained
- FIG. 2.1 shows the embodiment variant of a solenoid valve assembly in the energized state shown in FIG.
- FIG. 3 shows a further embodiment variant of a contouring of the front side of an anchor
- Figure 4 shows a first embodiment of the contouring of the end face of the yoke with plan trained anchor end face
- Figure 5 shows a second embodiment of the contouring of the end face of the magnetic yoke with plane executed end face of the armature.
- FIG. 1 shows a section through a solenoid valve assembly of a fuel injector according to the prior art.
- a solenoid valve 12 is housed in a fuel injector 10.
- the fuel injector 10 comprises an injector body 14, in which further components of the fuel injector 10, such as a pressure-relieved control chamber, with which a preferably needle-shaped injection valve member is actuated, are arranged. These further components of the fuel injector 10 are not shown in greater detail in the illustration according to FIG.
- the solenoid valve 12 comprises a magnetic coil 18, which is enclosed by a magnetic yoke 16.
- the magnetic yoke 16 is also referred to as a magnetic core.
- the magnet coil 18 is electrically contacted via at least one coil contact 20.
- the magnetic yoke 16 is received in the fuel injector 10 via an intermediate plate 22 and an attachment 24 arranged above it.
- the magnetic yoke 16 is supported on a disk-shaped insert 42 of the fuel injector 10.
- the magnetic yoke 16 extends through opening 28, in which a sleeve 30 is inserted.
- the sleeve 30 encloses a closing spring 26, which is supported on the attachment 24.
- the closing spring 26 encloses an anchor pin 36, which extends at the upper end face of an anchor bolt 34.
- An anchor plate 32 is also received on the anchor bolt 34.
- the armature plate 32 and an anchor bolt 34 comprehensive anchor assembly is guided in a guide opening 40 of the disc-shaped insert 42.
- a guide gap 38 results, via which a control quantity flowing out of the control chamber of the fuel injector 10, not shown in FIG. 1, flows in the direction of a low-pressure side return.
- the armature disk 32 is attracted by the arrangement shown in FIG. 1 when the magnet coil 18, which is optionally enclosed by a sheath 44, is energized.
- the anchor bolt 34 connected to the armature disk 32 is pulled up in the vertical direction and releases a discharge throttle of a control chamber acting upon an injection valve member, in which system pressure is present.
- the system pressure applied to the control chamber is generated by a high pressure source such as a high pressure fuel injection system common rail.
- Detail Z shows the self-adjusting between the magnetic yoke and the armature disk of the armature assembly cavity in an enlarged view.
- Reference numeral 68 denotes an end face of the sleeve 30 surrounding the closing spring 26, which is embedded in a passage opening 28 of the magnetic yoke 16 or of the magnetic core.
- the gap between the flat end face 58 of the magnetic yoke 16 and the flat end face 54 of the armature disk 32 has a substantially constant course in the radial direction, which results in the occurrence of cavitation bubbles when the solenoid valve 12 is switched the high flow rate from the cavity 50 favors.
- Figure 2 shows a first embodiment of the contour of an end face of an anchor according to the inventive solution.
- the valve spring 26 encloses the anchor pin 36 which is formed on the upper end face of the anchor bolt 34 and acts on the upper end face of the anchor bolt 34.
- the armature disk 32 is located on the anchor bolt 34 in a force, positive or material fit Z plan formed end face 54 of the armature disk 32 is, according to the proposed solution according to the invention, provided with a conical recess 56.
- the conical recess 56 extends radially outwards from the seat face of the armature disk 32 on the circumference of the anchor bolt 34 and is constructed in such a way that the conical recess 56 forms a maximum recess (see illustration according to FIG.
- Figure 2.1 shows the illustrated in Figure 2, fiction, contemporary design of the solenoid valve assembly in the energized state of the solenoid valve.
- the armature disk 32 In energized state of the magnet yoke 16 enclosed by the magnetic coil 18, the armature disk 32 is attracted and moves into the cavity 50 as shown in Figure 2 inside.
- the existing in the cavity 50 control volume is displaced and flows in the radial direction sideways from the cavity 50 from.
- the outflow velocity of the control volume contained in the cavity 50 is throttled by an air gap 60 with throttle effect, which adjusts the outer edge of the armature disk 32 with respect to the flat end face 58 of the magnetic yoke 16, so that the inclination of the flowing out of the cavity 50 fuel volume to Cavitation is significantly reduced.
- Reference numeral 52 denotes an averaged residual air gap, which represents an average value between the air gap 62 at its longest extent and an air gap in the edge region between the armature disk 32 and the planar end face 58 of the magnetic yoke 16.
- cavitation bubbles which have formed there can be made to implode, so that the damage to the front side 54 can be considerably reduced by cavitation erosion.
- FIG. 3 shows a further embodiment of the solenoid valve assembly proposed according to the invention.
- an annular, trough-shaped recess 66 is formed on the end face 54 of the armature disk 32. Seen in the radial direction, the trough-shaped recess 66 on the end face 54 of the kerusion 32 bounded by an edge web 64.
- the edge web 64 takes over the throttle effect similar to the conical tapered recess 56 according to the embodiment of the solenoid valve 12 shown in Figure 2.
- the volume of fuel displaced from the cavity 50 flows through a gap that extends between the plane-shaped end face 58 of the magnetic yoke 16 and the upper side of the edge web 64 sets in the radial direction from the cavity 50 from.
- the discharge rate of the control volume from the cavity 50 is limited, which considerably reduces the tendency of the control volume contained therein to cavitate.
- the sleeve 60 which surrounds the closing spring 26, is located in the passage opening 28 in the magnetic yoke 16.
- the closing spring 26 encloses with their individual turns the formed on the front side of the anchor bolt 34 anchor pin 36.
- the cavity 50 between the end face 54 of the armature disk 32 and the end face 58 of the magnetic yoke 16 is limited, which is executed plan.
- FIG. 4 shows a further embodiment variant of the solenoid valve assembly proposed according to the invention.
- the end face 58 of the magnetic yoke 16 is contoured in the illustration of Figure 4, whereas the end face 54 of the armature disk 32 is formed flat.
- the trough-shaped recesses 66 formed on the front side 54 according to the embodiment in FIG. 3 are not on the front side 54 of the armature disk 32 but on the front side 58 of the magnetic yoke 16.
- the vane-shaped recess 66 on the end face 58 is delimited by an edge web 64 formed in the magnetic yoke 16, whereby an action with respect to the reduction of the discharge rate of control volume from the cavity 50 analogous to the embodiment of FIG.
- the end face 54 of the armature disk 32 ends flush with the end face of the anchor bolt 34, on which the anchor pin 36 is located, which projects into the interior of the closing spring 26.
- the ring-shaped, trough-shaped recess 66 formed in the magnetic yoke 16 is capable of attenuating the stroke movement of the armature disk 32 in the direction of the magma. netjoch to afford 16, in the event that the magnet yoke 16 enclosed by the magnetic coil 18 is energized via the at least one coil contact 20 shown in Figure 1.
- FIG. 5 shows an embodiment of the solenoid valve assembly proposed according to the invention, in which the end face of the magnetic yoke 16 is provided with a conically formed recess.
- FIG. 5 represents a reversal of the embodiment variant according to the representations in FIGS. 2 and 2.1.
- the conically shaped recess 56 is located on the end face 58 of the magnetic yoke 16 or magnetic core. This still has the sleeve 30, which surrounds the closing spring 26.
- the closing spring 26 is supported, the anchor pin 36 of the anchor bolt 34 enclosing, on the front side of the anchor bolt 34 from.
- the cavity 50 between the front side 58 of the magnetic yoke 16 and the front side 54 of the armature disk 32 increases upon cancellation of the energization of the solenoid 18 of the solenoid valve 12, since the anchor bolt 34 is pressed by the closing spring 36 in its closed position in which a closing element not shown in detail, a pressure relief of a control chamber for actuating an injection valve member terminated.
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)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610021735 DE102006021735A1 (de) | 2006-05-10 | 2006-05-10 | Magnetventil mit geflutetem Ankerraum |
PCT/EP2007/052266 WO2007128607A1 (de) | 2006-05-10 | 2007-03-12 | Magnetventil mit geflutetem ankerraum |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2021616A1 true EP2021616A1 (de) | 2009-02-11 |
EP2021616B1 EP2021616B1 (de) | 2011-05-18 |
Family
ID=38283523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07726781A Active EP2021616B1 (de) | 2006-05-10 | 2007-03-12 | Magnetventil mit geflutetem ankerraum |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2021616B1 (de) |
DE (1) | DE102006021735A1 (de) |
WO (1) | WO2007128607A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008001122A1 (de) * | 2008-04-10 | 2009-10-15 | Robert Bosch Gmbh | Magnetventil ohne Restluftspaltscheibe |
DE102008040015A1 (de) * | 2008-06-30 | 2009-12-31 | Robert Bosch Gmbh | Magnetventil, Kraftstoff-Injektor sowie Herstellungsverfahren |
DE102009045728A1 (de) | 2009-10-15 | 2011-04-21 | Robert Bosch Gmbh | Magnetventil sowie Kraftstoff-Injektor mit einem Magnetventil |
DE102012206213A1 (de) * | 2012-04-16 | 2013-10-17 | Robert Bosch Gmbh | Kraftstoffinjektor mit Magnetventil |
DE102018206504A1 (de) * | 2018-04-26 | 2019-10-31 | Robert Bosch Gmbh | Kraftstoffinjektor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT227711Y1 (it) * | 1992-12-29 | 1997-12-15 | Elasis Sistema Ricerca Fiat | Valvola di dosaggio a comando elettromagnetico per un iniettore di combustibile |
DE19832826C2 (de) * | 1998-07-21 | 2000-08-17 | Bosch Gmbh Robert | Montageverfahren für Kraftstoff-Einspritzventil und Vorsteuerventil sowie Kraftstoff-Einspritzventil |
DE10018304A1 (de) * | 2000-04-13 | 2001-10-25 | Bosch Gmbh Robert | Ankerplatte eines Schaltmagneten, insbesondere für Dieselkraftstoff-Injektoren, und Verfahren zur Herstellung einer solchen Ankerplatte |
DE10131199A1 (de) * | 2001-06-28 | 2003-01-16 | Bosch Gmbh Robert | Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine |
DE10305985A1 (de) * | 2002-12-13 | 2004-07-15 | Robert Bosch Gmbh | Prellerfreier Magnetsteller für Einspritzventile |
-
2006
- 2006-05-10 DE DE200610021735 patent/DE102006021735A1/de not_active Withdrawn
-
2007
- 2007-03-12 EP EP07726781A patent/EP2021616B1/de active Active
- 2007-03-12 WO PCT/EP2007/052266 patent/WO2007128607A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007128607A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102006021735A1 (de) | 2007-11-15 |
WO2007128607A1 (de) | 2007-11-15 |
EP2021616B1 (de) | 2011-05-18 |
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