EP3204630A1 - Vanne proportionnelle à commande électromagnétique et pompe à carburant haute pression dotée d'une telle vanne proportionnelle - Google Patents

Vanne proportionnelle à commande électromagnétique et pompe à carburant haute pression dotée d'une telle vanne proportionnelle

Info

Publication number
EP3204630A1
EP3204630A1 EP15771905.5A EP15771905A EP3204630A1 EP 3204630 A1 EP3204630 A1 EP 3204630A1 EP 15771905 A EP15771905 A EP 15771905A EP 3204630 A1 EP3204630 A1 EP 3204630A1
Authority
EP
European Patent Office
Prior art keywords
proportional valve
fuel pump
pressure fuel
housing part
adapter piece
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Withdrawn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
EP15771905.5A
Other languages
German (de)
English (en)
Inventor
Michael IMHOF
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 EP3204630A1 publication Critical patent/EP3204630A1/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Withdrawn legal-status Critical Current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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48—Assembling; Disassembling; Replacing
    • F02M59/485—Means for fixing delivery valve casing and barrel to each other or to pump casing
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit

Definitions

  • the invention relates to an electromagnetically verifiable proportional valve with the features of the preamble of claim 1. Furthermore, the invention relates to a high-pressure fuel pump with such a proportional valve for controlling the flow rate.
  • German Offenlegungsschrift DE 10 2011 017 495 A1 discloses a metering unit for a high-pressure pump of a fuel injection system, in particular of a common-rail injection system, which comprises a solenoid valve.
  • the solenoid valve has a magnetic core with a central bore in which a valve piston is reciprocally accommodated.
  • the valve piston has control slots arranged on the shell side, which release or close a defined flow cross-section as a function of the axial position of the valve piston.
  • the axial position of the valve piston is variable by means of an electromagnet, which cooperates with an armature plunger unit for this purpose.
  • the plunger is used to couple the armature with the valve piston and is guided for this purpose by the magnetic core.
  • Housing bore of the high-pressure pump is inserted in such a way that the bore receiving the valve piston comes to rest within the housing bore.
  • the magnetic core has two O-rings, one of which first in the radial direction and a second seals in the axial direction.
  • a third O-ring which is arranged in the region of the connection of the magnetic core with the magnetic coil of the electromagnet.
  • the present invention is therefore an object of the invention to provide an electromagnetically actuated proportional valve for controlling the flow rate of a high-pressure pump, which is more robust compared to the known from the prior art proportional valves.
  • the proportional valve should be attachable to a high-pressure fuel pump such that a reliable over the life seal is given to the outside to maintain the functionality of the valve.
  • the electromagnetically actuated proportional valve with the features of claim 1 is proposed.
  • Advantageous developments of the invention can be found in the dependent claims.
  • a high-pressure fuel pump is further specified with such a proportional valve for controlling the flow rate.
  • the proposed proportional valve should be used in particular as a metering unit.
  • the proposed for controlling the flow rate of a high-pressure fuel pump electromagnetically actuated proportional valve comprises an electromagnet for acting on a lifting armature.
  • the armature is coupled via a plunger with an axially displaceable valve piston, so that the stroke of the armature causes an axial displacement of the valve piston against the spring force of a spring.
  • the axially displaceable valve piston is received in a flanged bush, via which the proportional valve with a housing part of the high-pressure fuel pump is connected.
  • the collar bushing thus assumes the functions of the magnetic core. Compared to the complex shape of a magnetic core, the collar bushing has a very simple form and is therefore easy and inexpensive to manufacture.
  • valve piston and the spring can be preassembled in the flanged bushing and the preassembled unit can initially be used without electromagnet in a bore on the housing part of the high-pressure fuel pump, which simplifies the cultivation of the high-pressure fuel pump.
  • the flanged bushing as an add-on component can then be connected to the other components of the proportional valve.
  • the collar bushing can be connected in a simple manner by pressing into a corresponding receiving bore of the housing part of the high-pressure fuel pump with this.
  • the interference fit of the collar bushing in the receiving bore also makes the arrangement of an additional sealing element, for example in the form of a radially sealing O-ring, dispensable. This eliminates the risk of damage to the sealing element during assembly. Sealing over the interference fit is also more robust over the service life as it is less subject to wear.
  • the collar bushing has a radially inwardly extending
  • the collar bushing is at least partially surrounded by an adapter piece, via which the collar bushing is connected to the electromagnet and / or a cup-shaped housing part for receiving the electromagnet or connectable.
  • the connection of the adapter piece with the collar socket can be made via a collar of the adapter piece, so that the adapter piece can be placed on the collar bushing, preferably be pressed on.
  • the adapter piece may be held via a press connection in the receiving bore of the housing part of the high-pressure fuel pump, which is designed for this purpose preferably as a stepped bore.
  • the adapter piece itself can be a stamped and bent part, which is simple and inexpensive to produce.
  • the adapter piece When mounting the proportional valve to the high-pressure fuel pump, the adapter piece can first be connected to the flanged bush or alternatively first with the cup-shaped housing part and / or the electromagnet.
  • the adapter piece forms a cone for automatically centering the electromagnet and / or the cup-shaped housing part when connecting to the adapter piece.
  • the adapter piece forms a radially outwardly extending flange, via which the adapter piece can be abutted axially on the outside of the housing part of the high-pressure fuel pump.
  • the flange holes may be provided for receiving screws that allow a screw connection of the adapter piece with the housing part.
  • the valve piston has at least one shell-side opening, which can be brought into coincidence with a serving as an inlet annular groove of the collar, into which opens at least one inlet bore.
  • the at least one inlet bore is preferably formed as a radial bore in the collar bushing. Also in this regard, thus replacing the collar bushing the missing magnetic core, in which usually the inlet holes are formed.
  • the armature is designed as a plunger anchor and firmly connected to the plunger. Preferably, the plunger is pressed into the anchor. Because The characteristic of the mechanical part of the proportional valve can be specified via the press-in depth.
  • the high-pressure fuel pump comprises a housing part, in which a receiving bore is formed, in which the collar bushing of the proportional valve is inserted, preferably pressed.
  • a seal to the outside via an additional sealing element in particular a radially sealing O-ring, is dispensable.
  • the seal is effected solely via the interference fit, which is less subject to wear in relation to a radially sealing O-ring inserted into the receiving bore. The risk of a hydraulic bypass is thus minimized and ensures correct metering.
  • the receiving bore in the housing part of the high-pressure fuel pump is designed as a stepped bore, in which further the adapter piece of the proportional valve at least partially used, preferably pressed.
  • the seal is further optimized to the outside.
  • an axially sealing O-ring between the adapter piece and the housing part can be inserted.
  • the advantages of a high-pressure fuel pump with a proportional valve according to the invention are to be seen in particular in that the cultivation of the proportional valve is simplified.
  • the connection of the proportional valve with the high-pressure fuel pump is achieved via the collar bushing and possibly the adapter piece, which are preferably pressed into a corresponding receiving bore of the housing part of the high-pressure fuel pump.
  • With the interference fit eliminates the need for the arrangement of an additional sealing element, in particular a sealing in the radial direction O-ring. This can also go along with a refining of the components, which in turn has a favorable effect on the manufacturing costs.
  • the flanged bush and the adapter piece which replace the magnetic core, also allow a particularly compact construction in the axial direction, so that the space requirement of the high-pressure fuel pump is reduced.
  • the procedure is preferably as follows. First, the valve piston and the spring are inserted into the collar bushing. The flanged bushing including the valve piston and the spring is then pressed into the receiving bore of the housing part of the high-pressure fuel pump, the preload of the spring being predetermined via the press-in depth. At the same time any manufacturing tolerances can be compensated via the press-in depth. Subsequently, the adapter piece is pressed into the receiving bore and / or pressed onto the collar bushing. Now only the cup-shaped housing part of the proportional valve, in which the electromagnet and the armature plunger assembly are added, to be connected to the adapter piece. About the cone of the adapter piece while doing a centering.
  • the adapter piece can only be connected to the pot-shaped housing part of the proportional valve after the solenoid was used with the anchor-ram composite in the cup-shaped housing part of the proportional valve.
  • the cup-shaped housing part with the adapter piece is then placed on the collar bushing and bolted to the housing part of the high-pressure fuel pump.
  • FIG. 1 shows a schematic longitudinal section through an inventive proportional valve according to a first preferred embodiment of a high-pressure fuel pump
  • FIG. 2 shows the proportional valve of FIG. 1 during cultivation
  • Fig. 3 is a schematic longitudinal section through an inventive proportional valve according to a further preferred embodiment of a high-pressure fuel pump and
  • FIG. 4 the proportional valve of FIG. 3 during cultivation.
  • the proportional valve shown in FIG. 1 is attached to a high-pressure fuel pump.
  • the connection is made via a collar bushing 6, which is pressed into a receiving bore 16 of a housing part 10 of the high-pressure fuel pump.
  • an adapter piece 9 is placed, which is also pressed into the receiving bore 16.
  • the receiving bore 16 is designed for this purpose as a stepped bore.
  • the adapter piece 9 has a cone 11, which facilitates the placement of an electromagnet 1 for actuating the proportional valve when mounted on the high-pressure fuel pump.
  • the attachment of the electromagnet 1 takes place only after the collar bushing 6 and the adapter piece 9 have been pressed into the receiving bore 16 of the housing part 10 of the high-pressure fuel pump.
  • the electromagnet 1 is accommodated together with an armature 2 in an encapsulating cup-shaped housing part 7 of the proportional valve.
  • Housing part 7 has a flange portion 17 which rests on the outside of the housing part 10 of the high-pressure fuel pump and can be screwed to the housing part 10. With the screw connection, the proportional valve is fixed to the housing part 10 of the high-pressure fuel pump.
  • the armature 2 is designed as a plunger armature and connected to a plunger 3 for coupling with a valve piston 4, which is received in the collar bushing 6 axially displaceable.
  • the valve piston 4 has shell-side openings 13, which can be brought into coincidence with an annular groove 14 of the collar bushing 6, in the formed as radial bores inlet holes 15 open. The axial position of the valve piston 4 with respect to the annular groove 14 thus provides the flow through the valve.
  • valve piston 4 is acted upon by the spring force of a spring 5, which biases the valve piston 4 in the direction of the plunger 3 axially.
  • a ring collar 8 formed on the collar 6 serves as a stop.
  • FIGS. 3 and 4 An alternative embodiment of a proportional valve according to the invention is shown in FIGS. 3 and 4.
  • this has a flange 12 which abuts the outside of the housing part 10 of the high-pressure fuel pump.
  • the flange 12 receives the flange portion 17 of the cup-shaped housing part 7 of the proportional valve and is screwed together with this with the housing part 10 of the high-pressure fuel pump.
  • a sealing element 18 is also inserted, which causes an additional axial seal.
  • the adapter piece 9 is inexpensive to manufacture as a stamped and bent part.
  • housing part 7 and the electromagnet 1 is connected, wherein the cone 11 causes a centering. Since the armature bearing is done exclusively via the preassembled unit, the bearing testing is simplified. In addition, the adapter piece 9 optimizes the magnetic flux.

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)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne une vanne proportionnelle à commande électromagnétique destinée à réguler le débit d'une pompe à carburant haute pression, ladite vanne comprenant un électroaimant (1) destiné à influer sur une armature (2) à mouvement de va-et-vient, l'armature (2) étant accouplée à un piston de vanne (4) mobile axialement par l'intermédiaire d'un poussoir (3), de sorte que le va-et-vient de l'armature (2) entraîne un déplacement axial du piston de vanne (4) à l'encontre de la force d'un ressort (5). Selon l'invention, le piston de vanne (4) à déplacement axial est logé dans une douille à collet (6), par l'intermédiaire de laquelle la vanne proportionnelle peut être reliée à une partie de carter (7) de la pompe à carburant haute pression. L'invention concerne en outre une pompe à carburant haute pression dotée d'une telle vanne de régulation de débit proportionnelle.
EP15771905.5A 2014-10-07 2015-09-23 Vanne proportionnelle à commande électromagnétique et pompe à carburant haute pression dotée d'une telle vanne proportionnelle Withdrawn EP3204630A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014220226.4A DE102014220226A1 (de) 2014-10-07 2014-10-07 Elektromagnetisch betätigbares Proportionalventil sowie Kraftstoffhochdruckpumpe mit einem solchen Proportionalventil
PCT/EP2015/071832 WO2016055268A1 (fr) 2014-10-07 2015-09-23 Vanne proportionnelle à commande électromagnétique et pompe à carburant haute pression dotée d'une telle vanne proportionnelle

Publications (1)

Publication Number Publication Date
EP3204630A1 true EP3204630A1 (fr) 2017-08-16

Family

ID=54238412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15771905.5A Withdrawn EP3204630A1 (fr) 2014-10-07 2015-09-23 Vanne proportionnelle à commande électromagnétique et pompe à carburant haute pression dotée d'une telle vanne proportionnelle

Country Status (5)

Country Link
EP (1) EP3204630A1 (fr)
KR (1) KR20170066514A (fr)
CN (1) CN107110094A (fr)
DE (1) DE102014220226A1 (fr)
WO (1) WO2016055268A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762301A (zh) * 2017-01-22 2017-05-31 无锡威孚高科技集团股份有限公司 柴油高压共轨泵用分体式比例流量阀
DE102017210355A1 (de) * 2017-06-21 2018-12-27 Robert Bosch Gmbh Proportionalventil zum Steuern eines gasförmigen Mediums
DE102019131537B4 (de) * 2019-11-21 2022-01-27 Kendrion (Villingen) Gmbh Vorrichtung zur Druckregelung in einer Kraftstoffzuführung eines Verbrennungsmotors mit einer Common-Rail-Einspritzung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023621A1 (de) * 2000-05-13 2001-11-15 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
CN2524018Y (zh) * 2001-12-13 2002-12-04 万向钱潮股份有限公司 汽车防抱制动系统常闭电磁阀
DE10247145A1 (de) * 2002-10-09 2004-04-22 Robert Bosch Gmbh Durchflussregeleinrichtung, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
CN2633682Y (zh) * 2003-06-10 2004-08-18 浙江春晖智能控制股份有限公司 汽车防抱制动系统常开增压电磁阀
DE102007052224A1 (de) * 2007-10-31 2009-05-07 Robert Bosch Gmbh Mengensteuerventileinrichtung für eine Hochdruckkraftstoffpumpe, Verfahren zur Herstellung einer solchen Mengensteuerventileinrichtung und Hochdruckkraftstoffpumpe
JP4752853B2 (ja) * 2008-03-03 2011-08-17 株式会社デンソー 流量制御弁
DE102011017495A1 (de) 2011-04-21 2012-10-25 Robert Bosch Gmbh Zumesseinheit und Hochdruckpumpe
DE102012211395A1 (de) * 2012-07-02 2014-01-02 Robert Bosch Gmbh Zumesseinheit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016055268A1 *

Also Published As

Publication number Publication date
CN107110094A (zh) 2017-08-29
KR20170066514A (ko) 2017-06-14
WO2016055268A1 (fr) 2016-04-14
DE102014220226A1 (de) 2016-04-07

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