EP3172428A1 - Elektromagnetische stelleinheit für ein saugventil sowie saugventil - Google Patents
Elektromagnetische stelleinheit für ein saugventil sowie saugventilInfo
- Publication number
- EP3172428A1 EP3172428A1 EP15727376.4A EP15727376A EP3172428A1 EP 3172428 A1 EP3172428 A1 EP 3172428A1 EP 15727376 A EP15727376 A EP 15727376A EP 3172428 A1 EP3172428 A1 EP 3172428A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- guide
- actuator according
- armature guide
- electromagnet
- 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
- 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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/366—Valves being actuated electrically
- F02M59/368—Pump inlet valves being closed when actuated
-
- 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
- F02M2200/07—Fuel-injection apparatus having means for avoiding sticking of valve or armature, e.g. preventing hydraulic or magnetic sticking of parts
-
- 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
- F02M2200/9069—Non-magnetic metals
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
-
- 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
- F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
Definitions
- the invention relates to an electromagnetic actuator for a suction valve for supplying a high-pressure fuel pump, in particular a common rail high-pressure pump, with fuel, wherein the electromagnetic actuator comprises the features of the preamble of claim 1. Furthermore, the invention relates to a suction valve with such an electromagnetic actuator.
- German Offenlegungsschrift DE 10 2010 027 745 A1 discloses a high-pressure pump for fuel injection systems of air-compressing, self-igniting internal combustion engines with an electromagnetically controllable intake or intake valve for the metering of fuel.
- a full or partial filling of a pump working chamber of the high-pressure pump with fuel can be realized via the suction or inlet valve.
- the control of the suction or inlet valve via an electromagnetic actuator, which comprises an annular magnetic coil and a cooperating with the magnetic coil, designed as a plunger anchor.
- the armature is fixedly connected via a ring body with a valve stem of the suction or inlet valve, so that an axial displacement of the armature when energizing the magnetic coil simultaneously causes an axial displacement of the valve stem.
- an electromagnetic actuator or a pressure control valve with an electromagnet and an armature for acting on an actuator is also known.
- the armature is designed as a dip anchor and guided axially displaceably in an armature guide.
- at least one slotted bearing ring is received within the armature guide, which reduces the frictional stressed contact area with the armature.
- the bearing ring is made of a plastic material, in particular of a plain bearing material, such as polyetheretherketone (PEEK), in order to further reduce the friction between the bearing ring and the armature.
- PEEK polyetheretherketone
- the bearing ring may also be used to define a secondary air gap between the armature and the armature guide.
- the present invention has for its object to provide an electromagnetic actuator for a suction valve for supplying a high-pressure fuel pump, in particular a common rail high-pressure pump, with fuel specify that is very compact and easy and inexpensive to produce.
- the electromagnetic actuator is proposed with the features of claim 1.
- Advantageous developments of the invention can be found in the dependent claims.
- a suction valve is specified with such an electromagnetic actuator.
- the proposed for a suction valve electromagnetic actuator comprises an electromagnet and an armature, which is axially slidably guided in an armature guide, which surrounds an outer peripheral region of the armature.
- the armature guide also serves to support the armature, the armature being designed as a flat armature which limits an axial working air gap formed between the armature and the electromagnet.
- the mounting of the armature via the armature guide, which surrounds an outer peripheral region of the armature is able to replace a centrally arranged anchor bolt, which is usually used for guiding and / or supporting a flat armature formed anchor.
- the height of the electromagnetic actuator can be reduced with the same functionality, so that a particularly compact in the axial direction actuator is created.
- the omission of the anchor bolt also allows a direct connection of the armature with a valve piston of the suction valve, which may be partially included for this purpose in a central recess of the armature.
- the armature guide is a separate component, which is at least partially sleeve-shaped and preferably extends over the entire height of the armature. The training as a separate component simplifies the manufacture of the Ankeriva- tion, so that it can be designed with little play.
- the armature guide has a radially extending collar portion which extends into the working air gap between the armature and the electromagnet inside. That is, the collar portion of the anchor guide extends radially inward.
- the anchor guide may be formed, for example, substantially pot-shaped. The armature guide can replace in this way a usually arranged between the armature and the electromagnet residual air gap disc. As a result, the number of components is further reduced, which in turn has a favorable effect on the manufacturing costs.
- the armature guide forms a stroke stop for the armature. This means that the stroke of the armature or its displacement in the axial direction is limited by the armature guide.
- the formation of the stroke stop is preferably carried out via a radially extending collar portion of the armature guide, which extends into the working air gap.
- the armature guide can also be designed in several parts and have a sleeve-shaped first part and a disk-shaped second part for forming the stroke stop.
- the armature guide is wholly or partly made of a non-magnetic material. This applies in particular to the radially extending collar section extending into the working air gap or the disk-shaped second part of the armature guide. Because then the armature guide can be used at the same time for the magnetic separation of the armature from the electromagnet to counteract a magnetic sticking of the armature to the electromagnet and in this way to improve the dynamics of the actuator.
- the armature guide has at least one peripheral aperture in the form of a bore and / or a slot.
- the bore or slot facilitates hydraulic compensation during an axial displacement of the armature, so that short switching times can be realized.
- the venting of the valve is improved via the bore or the slot.
- a plurality of bores are provided, which are evenly distributed over the circumference and / or arranged at an axial distance from each other.
- this is preferably designed as a longitudinal slot to form an axially extending flow channel.
- a longitudinal slot has the advantage that the armature guide is simple and inexpensive to produce from a film material that is rolled into a sleeve.
- the armature guide has at least one outer and / or inner circumferential groove, preferably a longitudinal groove.
- These measures should also alone or in combination facilitate the hydraulic compensation with an axial displacement of the armature and thus improve the switching dynamics.
- longitudinal grooves in turn axially extending flow channels are provided, via which a hydraulic compensation is particularly easy to reach.
- the electromagnet comprises an annular magnetic coil which is accommodated in a cup-shaped magnetic core.
- the magnetic core serves to protect the magnetic coil and at the same time forms an annular outer pole and an annular inner pole, which are connected via an annular web.
- the pot-shaped magnetic core is therefore preferably open only to one side, so that on this side, the magnetic coil can be inserted into the magnetic core.
- the unilaterally open magnetic core is oriented such that the working air gap between the magnetic core and the armature is formed. That is, the open side is preferably the side away from the anchor. The solenoid is protected in this way by the magnetic core against contact with fuel.
- the armature guide has a radially extending collar portion or a disk-shaped second portion as a replacement for a disposed between the armature and the electromagnet residual air gap disc, this or this comes to rest between the magnetic core and the armature.
- the armature guide in this case serves as the magnetic separation between the armature and the magnetic core to reduce magnetic sticking of the armature to the magnetic core when the solenoid is energized and the armature moves in the direction of the solenoid to reduce the axial working air gap.
- the armature is acted upon by the spring force of a spring. The spring serves to return the armature to its initial position when the energization of the solenoid is terminated.
- the spring is designed as a helical compression spring.
- the spring pass through the armature guide, in particular the radially extending collar section extending into the axial working air gap, or the disk-shaped second part of the armature guide arranged there. Because then the spring can be supported directly or indirectly, for example via a shim on the anchor.
- a particularly compact design of the invention is achieved when the electromagnet and / or the armature guide are received in an axial bore of a screw plug, via which a valve body of the suction valve in a housing part of the high-pressure fuel pump is fixed.
- a separate housing part for the electromagnetic actuator can be omitted in this way.
- the axial bore of the screw plug is designed stepped in order to achieve via a step support of the electromagnet and / or the armature guide in the axial direction.
- the further proposed suction valve for supplying a high-pressure fuel pump, in particular a common-rail high-pressure pump with fuel comprises an electromagnetic actuator according to the invention, wherein the armature is coupled or coupleable with a valve piston having a cooperating with a sealing seat sealing contour.
- the coupling causes the armature entrains the valve piston during an axial displacement.
- the sealing contour is preferably formed on a plate-shaped portion of the valve piston, so that the valve piston also serves as a valve closing element.
- 1 is a schematic longitudinal section through a built-in a high-pressure pump suction valve with an electromagnetic actuator according to the invention
- 2 is a perspective view of a first armature guide of an inventive electromagnetic actuator
- FIG. 3 is a schematic longitudinal section through a second armature guide of an electromagnetic actuator according to the invention.
- FIG. 4 shows a schematic longitudinal section through a third armature guide of an electromagnetic actuating unit according to the invention
- FIG. 5 shows a schematic cross section through a fourth armature guide of an electromagnetic actuator according to the invention.
- FIG. 6 shows a schematic cross section through a fifth armature guide of an electromagnetic actuating unit according to the invention.
- the suction valve shown in Figure 1 comprises an axially displaceable valve piston 17 with a plate-shaped portion 19, on which a cooperating with a sealing seat 18 sealing contour is formed.
- the sealing seat 18 is formed in a valve body 15, which is received in a bore 26 of a housing part 16 of a high-pressure fuel pump and fixed in position via a locking screw 14.
- the valve piston 17 passes through the valve body 15 and has a portion lying outside of the valve body 15 which is surrounded by a spring plate 24 for supporting a valve spring 25. About the spring force of the valve spring 25, the valve piston 17 is acted upon in the closing direction.
- an electromagnetic actuating unit for actuating the suction valve, an electromagnetic actuating unit is provided which comprises an electromagnet 1 and an axially displaceable armature 2, which is coupled to the valve piston 17.
- the armature 2 is designed as a flat armature and limits the end face an axial working air gap 4, which is formed between the electromagnet 1 and the armature 2.
- the electromagnet 1 comprises an annular magnetic coil 10 and a cup-shaped magnetic core 11, in which the magnetic coil 10 is accommodated. When the magnet coil 10 is energized, the armature 2 is pulled in the direction of the magnet coil 10 in order to close the axial working air gap 4.
- a stroke stop 6 which in the present case is formed on a radially extending collar portion 5 of a sleeve-shaped anchor guide 3, which surrounds the armature 2.
- a spring 12 is provided, which passes through the collar portion 5 of the armature guide.
- the armature guide 3 surrounding the armature 2 serves primarily to guide and support the armature 2.
- the armature guide 3 is thus able to replace a central armature bolt, which usually serves to guide and / or support the armature 2.
- the armature guide is in the present case made of a non-magnetic material, so that at the same time a magnetic separation of the armature 2 from the electromagnet 1 is effected at the same time.
- the armature guide 3 thus counteracts a magnetic bonding of the armature 2 to the electromagnet 1, whereby the switching dynamics is improved.
- the armature guide 3 may be formed as a slotted sleeve.
- This embodiment of an armature guide 3 is particularly simple and therefore inexpensive to manufacture. Because it can be used a film material that is rolled into a sleeve. The opposite longitudinal edges of the film form an axially extending slot 8, which also serves as a flow channel to provide the necessary hydraulic compensation in an axial displacement of the armature 2.
- FIG. 1 An alternative embodiment of an armature guide 3 is shown in FIG.
- the armature guide 3 is pot-shaped, wherein the radially extending collar portion 5 defines a central recess for the implementation of the spring 12 to form the stroke stop 6. If the armature guide 3 has no slot 8, it is preferable to provide at least one bore 7, via which a hydraulic compensation and / or a ventilation can be effected.
- a sleeve-shaped armature guide 3 with a plurality of bores 7 is shown by way of example in FIG. However, the sleeve shape of the armature guide 3 is not mandatory in this context.
- the anchor guide 3 could also be designed cup-shaped.
- Anchor guide 3 are formed.
- the grooves 9 serve as flow channels to provide the necessary hydraulic compensation with an axial displacement of the armature 2.
- the armature guide 3 of an electromagnetic actuating unit according to the invention is preferably - as shown in Figure 1 - taken directly into an axial bore 13 of the screw 14 so that the actuator and thus the suction valve in the axial and radial direction can be made very compact design.
- the electromagnet 1 is also used in the present case, with an encapsulation 20 sealing the axial bore 13 towards the outside in order to protect the electromagnet 1.
- the encapsulation 20 also forms a
- Plug connector 22 for the electrical connection of the solenoid 10 from.
- a coil wire end 21 of the magnetic coil 10 is guided for this purpose up to a contact pin 23 of the connector terminal 22.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014214231.8A DE102014214231A1 (de) | 2014-07-22 | 2014-07-22 | Elektromagnetische Stelleinheit für ein Saugventil sowie Saugventil |
PCT/EP2015/062248 WO2016012143A1 (de) | 2014-07-22 | 2015-06-02 | Elektromagnetische stelleinheit für ein saugventil sowie saugventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3172428A1 true EP3172428A1 (de) | 2017-05-31 |
EP3172428B1 EP3172428B1 (de) | 2018-08-15 |
Family
ID=53298358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15727376.4A Not-in-force EP3172428B1 (de) | 2014-07-22 | 2015-06-02 | Elektromagnetische stelleinheit für ein saugventil sowie saugventil |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3172428B1 (de) |
DE (1) | DE102014214231A1 (de) |
WO (1) | WO2016012143A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016203516A1 (de) * | 2016-03-03 | 2017-09-07 | Robert Bosch Gmbh | Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil |
DE102016213984A1 (de) * | 2016-07-29 | 2018-02-01 | Robert Bosch Gmbh | Magnetkreis, elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe |
EP3364015B8 (de) * | 2017-02-15 | 2020-06-03 | Vitesco Technologies GmbH | Elektromagnetisches schaltventil und kraftstoffhochdruckpumpe |
DE102017222947A1 (de) * | 2017-12-15 | 2019-06-19 | Robert Bosch Gmbh | Elektromagnetisch betätigbares Einlassventil und Kraftstoff-Hochdruckpumpe |
DE102018222610A1 (de) * | 2018-12-20 | 2020-06-25 | Robert Bosch Gmbh | Elektromagnetische Betätigungseinrichtung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0828402A (ja) * | 1994-07-14 | 1996-01-30 | Nippondenso Co Ltd | 電磁弁 |
JP3598610B2 (ja) * | 1995-10-17 | 2004-12-08 | 株式会社デンソー | 電磁弁およびこれを用いた燃料ポンプ |
GB0210753D0 (en) * | 2002-05-10 | 2002-06-19 | Delphi Tech Inc | Fuel pump |
JP3874698B2 (ja) * | 2002-06-05 | 2007-01-31 | 株式会社デンソー | 電磁弁用ソレノイド |
DE10260174A1 (de) * | 2002-12-20 | 2004-07-08 | Robert Bosch Gmbh | Kolbenpumpe, insbesondere Hochdruck-Kraftstoffpumpe für Brennkraftmaschinen mit Direkteinspritzung |
DE102005051178A1 (de) | 2005-10-24 | 2007-04-26 | Robert Bosch Gmbh | Stelleinheit mit direkter Ankerlagerung |
US7451741B1 (en) * | 2007-10-31 | 2008-11-18 | Caterpillar Inc. | High-pressure pump |
DE102008043798A1 (de) * | 2008-11-17 | 2010-05-20 | Robert Bosch Gmbh | Kraftstoffzumesseinheit für eine Kraftstoffpumpe |
DE102010027745A1 (de) | 2010-04-14 | 2011-10-20 | Robert Bosch Gmbh | Hochdruckpumpe |
JP5218681B2 (ja) * | 2011-04-27 | 2013-06-26 | トヨタ自動車株式会社 | 高圧ポンプの調量装置 |
-
2014
- 2014-07-22 DE DE102014214231.8A patent/DE102014214231A1/de not_active Withdrawn
-
2015
- 2015-06-02 WO PCT/EP2015/062248 patent/WO2016012143A1/de active Application Filing
- 2015-06-02 EP EP15727376.4A patent/EP3172428B1/de not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP3172428B1 (de) | 2018-08-15 |
DE102014214231A1 (de) | 2016-01-28 |
WO2016012143A1 (de) | 2016-01-28 |
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