EP2823176B1 - Soupape de dosage d'un fluide - Google Patents

Soupape de dosage d'un fluide Download PDF

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Publication number
EP2823176B1
EP2823176B1 EP13702796.7A EP13702796A EP2823176B1 EP 2823176 B1 EP2823176 B1 EP 2823176B1 EP 13702796 A EP13702796 A EP 13702796A EP 2823176 B1 EP2823176 B1 EP 2823176B1
Authority
EP
European Patent Office
Prior art keywords
channel
valve
flow channel
ring
flow
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.)
Not-in-force
Application number
EP13702796.7A
Other languages
German (de)
English (en)
Other versions
EP2823176A1 (fr
Inventor
Michael Mayer
Pablo Antonio NAPAL JIMENEZ
Michael Fischer
Andrej Elsinger
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 EP2823176A1 publication Critical patent/EP2823176A1/fr
Application granted granted Critical
Publication of EP2823176B1 publication Critical patent/EP2823176B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive 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
    • 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
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M63/0031—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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

Definitions

  • the invention is based on a valve for metering a fluid, in particular for injecting fuel in a fuel injection system of internal combustion engines, according to the preamble of claim 1.
  • a known valve for metering a fluid ( DE 10 2009 026 532 A1 ) has an inlet for the fluid accommodated in a connection piece, an inlet opening formed in a valve body for metering a metered quantity of fluid by means of a valve needle closing and releasing the metering opening and controlled by a piezoelectric actuator and a valve closing spring, and an elongate, leading from the inlet to the metering opening hollow cylindrical flow channel on.
  • Connecting piece and valve body are fixed in a valve housing and close this in each case at one end of the housing fluid-tight. Coaxially with the valve housing, an elongate sleeve extends between the connection piece and the valve body.
  • the sleeve is fastened to the connection piece and the valve body with its two sleeve ends and accommodates a valve assembly consisting of the piezoelectric actuator and a hydraulic coupler.
  • the annular gap remaining between the sleeve and the valve housing constitutes the hollow-cylindrical flow channel for the fluid, so that the inner channel wall of the flow channel is formed by the sleeve and the outer channel wall of the flow channel by the valve housing.
  • a valve chamber which is connected via an introduced into the valve body radial inlet bore with the flow channel, while in the connecting piece, a connection is made from the flow channel to the inlet.
  • Out DE102010030383 is a valve for metering a fluid, in particular for injecting fuel in a fuel injection system of internal combustion engines, known.
  • the flow channel is limited by a built-in valve guide body with a base disk and a bore-like fluid passage in its flow. In this way, the total flow channel is subdivided into at least two mutually separate channel sections, whereby a throttled flow connection exists between the passage sections following one another in the flow direction in the region of the fluid passage.
  • the valve according to the invention with the features of claim 1 has the advantage that the design-related hydraulic resonances can be influenced by the subdivision of the flow channel into a plurality of mutually separated channel sections and the establishment of a flow connection between the successive channel sections in the flow direction, that an excitation critical, built-in Strukurmoden no longer takes place, so hydraulic resonances in the critical frequency range of typically 3 kHz can no longer arise.
  • the subdivision of the flow channel into two channel sections, and thus the division of the fluid volume into two sub-volumes takes place at half the length of the flow channel.
  • other division ratios and also several subdivisions of the flow channel with different division ratios are possible.
  • the subdivision of the flow channel and the production of the flow connection between the channel sections is realized in that at least one channel location in the flow channel, a ring with an annular gap and one of the radial channel width corresponding ring thickness or ring thickness or radial annular wall dimension is inserted into the flow channel ,
  • a ring advantageously has one rectangular or circular cross section and is made of a band or wire with a rectangular or circular cross-section.
  • the ring is fixed in the flow channel, which is preferably done by positive immersion of the ring in at least one annular groove which is incorporated in the inner and / or outer channel wall of the flow channel.
  • two rings are arranged one behind the other at a short distance at least one channel location in the flow channel.
  • the rings are aligned so that their annular gaps are rotated against each other in the circumferential direction, preferably by 180 °.
  • This constructive arrangement of the rings has the advantage that between two successive channel sections, an intermediate volume of the fluid is generated.
  • the subdivision of the flow channel and the flow connection between the generated channel sections is realized in that at least one point in the flow channel, a cross-sectional constriction is made.
  • This cross-sectional constriction is advantageously achieved by protruding from at least one of the two channel walls of the flow channel a circumferential on the channel wall nose into the flow channel, which is preferably made by a recess incorporated in the channel wall.
  • Such a circumferential constriction of the flow cross section of the flow channel has the advantage that, depending on the fluid pressure, the cross section of the constriction changes, namely increases with increasing pressure.
  • valve for metering a fluid is preferably used as an injection valve for injecting fuel in a fuel injection system of internal combustion engines, wherein preferably the fuel is injected into the combustion cylinder of the internal combustion engine.
  • the valve has an inlet 11 for the fluid, an orifice 12 for the fluid, and an elongated, hollow cylindrical flow channel 13 leading from the inlet 11 to the orifice 12.
  • the flow channel 13 has an outer channel wall 13 a, which is formed by a tubular valve housing 14, and an inner channel wall 13 b, which is formed by a valve housing 14 concentrically arranged sleeve 15.
  • the valve housing 14 is closed fluid-tight at one end face of a connector 16 and at its other end of a valve body.
  • the connecting piece 16 contains the inlet 11 while in the valve body 17, the metering opening 12 is formed.
  • the sleeve 15 is fixed in a fluid-tight manner with its one sleeve end to the connecting piece 16 and with its other sleeve end to the valve body 17.
  • a valve assembly is integrated, which consists of a kardanisch on the connector 16 mounted hydraulic coupler 18, a connected to the coupler 18 piezoelectric or magnetostrictive actuator 19 and a valve body 17 is supported valve closing spring 20.
  • Actuator 19 and valve closing spring 20 engage with opposite directions of action on a valve needle 21 which is guided axially displaceably in the valve body 17 and the metering opening 12 controls with a closing head 22 which cooperates with a valve seat 23 surrounding the metering orifice 12.
  • the actuator 19 is connected via a contact bridge 24 with an electrical connector 25 and lifts when energized the closing head 22 of the valve needle 21 against the restoring force of the valve closing spring 20 from the valve seat 23 to the outside.
  • the valve-closing spring 20 which is tensioned when the orifice 12 is opened via the valve needle 21, pushes the closing head 22 back onto the valve seat 23, so that the orifice 12 is closed.
  • the connection of the flow channel 13 and the metering opening 12 is produced within the valve body 17 by a valve chamber 26 upstream of the metering opening 12 and a radial bore 27 leading from the flow channel 13 to the valve chamber 26, while the flow channel 13 is connected to the inlet 11 through a connecting bore 33 introduced into the connector 16 connected.
  • the flow channel 13 with an annular flow cross section is subdivided into at least two mutually separated channel sections 131, 132 and a flow connection between the channel sections 131, 132 the fluid is made.
  • the subdivision of the flow channel 13 in the divider ratio is 1: 1. But according to a desired frequency shift can also others Division ratios and the subdivision of the flow channel 13 may be required in more than two channel sections.
  • the subdivision of the flow channel 13 into two or more channel sections and the establishment of the flow connection between the channel sections can be realized at one or more channel locations in various ways.
  • cutout A of the flow channel 13 is at a channel location in the flow channel 13, a cross-sectional constriction of the annular cross section of the flow channel 13 made.
  • outer channel wall 13a an annular recess 28 is impressed, which results in a projecting into the flow channel 13, on the channel wall 13a circumferential nose 29.
  • the same lug 29 may alternatively be present on the inner channel wall 13b formed by the sleeve 15.
  • the arrangement of a respective nose 29 on the inner channel wall 13b and on the outer channel wall 13a is possible, wherein the lugs 29 are opposite to each other or may be offset from each other at a short distance.
  • the width of the nose 29 seen in the axial direction can be adjusted according to the degree of desired throttling. Typical widths are 1 -10 mm. The remaining in the radial direction width of the flow channel 13 at the channel location (gap width) can also be adjusted according to the desired degree of throttling or narrower. Typical gap widths are 0.01 - 0.1 mm.
  • FIGS. 3 to 8 three further embodiments are shown, as at a channel location of the flow channel 13, a division into two consecutive channel sections 131 and 132 is achieved with a flow connection between the channel sections 131 and 132.
  • rings 30 are used with an annular gap 31 and a radial channel width of the flow channel 13 corresponding ring thickness or ring thickness or radial annular wall dimension, which are inserted into the flow channel 13.
  • a ring 30 a In the two embodiments according to FIGS. 3 to 6 is located at the channel location of the flow channel 13, a ring 30 a.
  • the ring 30 is in Flow channel 13 fixed to at least one channel wall, wherein the fixation is effected in that the ring 30 partially inserted into at least one of the channel walls 13a, 13b incorporated annular groove 32 positively.
  • the ring 30 has a rectangular cross section and the annular groove 32 is incorporated into the inner channel wall 13b.
  • the ring 30 is made of a band.
  • the ring 30 has a circular cross-section and the annular groove 32 is formed by an annular bead embossed into the outer channel wall 13a from the inside of the outer channel wall 13a.
  • the ring 30 is made of a wire.
  • each ring 30 has a circular cross-section and partially immersed in an annular groove 32, each formed by an annular bead which is embossed in the outer channel wall 13a from the inside thereof.
  • FIG. 8 shows, while the rings 30 are aligned so that their annular gaps 31 are rotated against each other. Preference is given to a rotation of the annular gap by 180 °.
  • the arrangement of two slightly spaced rings 30 has the advantage that an intermediate volume of the fluid is created between two consecutive channel sections. The same effect is achieved by the above-mentioned arrangement of two lugs 29 on the outer and inner channel wall 13a 13b, which are offset from each other at a short distance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Valves (AREA)
  • Lift Valve (AREA)

Claims (13)

  1. Soupape de dosage d'un fluide, en particulier pour l'injection de carburant dans une installation d'injection de carburant de moteurs à combustion interne, comprenant une entrée (11) pour le fluide, une ouverture de dosage (12) pour le fluide et un canal d'écoulement (13) allongé, cylindrique creux, conduisant de l'entrée (11) à l'ouverture de dosage (12), qui présente une paroi de canal extérieure et une paroi de canal intérieure (13a, 13b), caractérisée en ce que le canal d'écoulement (13) est divisé en au moins deux portions de canal séparées l'une de l'autre (131, 132) et une liaison d'écoulement étranglée pour le fluide existe entre des portions de canal (131, 132) successives dans la direction d'écoulement,
    caractérisée en ce que
    la liaison d'écoulement étranglée est réalisée entre un boîtier de soupape de forme tubulaire (14) et une douille (15) qui, en amont et en aval de la liaison d'écoulement étranglée, limitent le canal d'écoulement cylindrique creux (13) et s'étendent ainsi de manière ininterrompue, car la paroi de canal extérieure (13a) du canal d'écoulement (13) est formée par le boîtier de soupape de forme tubulaire (14) et la paroi de canal intérieure (13b) du canal d'écoulement (13) est formée par la douille (15) disposée coaxialement par rapport au boîtier de soupape (14), qui reçoit un module de soupape, le boîtier de soupape (14) étant fermé à chaque fois de manière étanche aux fluides au niveau d'un côté frontal par une pièce de raccordement (16) contenant l'entrée (11) et au niveau de l'autre côté frontal par un corps de soupape (17) contenant l'ouverture de dosage (12), et la douille (15) s'étendant entre la pièce de raccordement (16) et le corps de soupape (17) et étant fixée à chaque fois de manière étanche aux fluides avec ses extrémités de douille sur la pièce de raccordement (16) et le corps de soupape (17).
  2. Soupape selon la revendication 1, caractérisée en ce que pour réaliser la division et la connexion fluidique au niveau d'au moins un emplacement du canal dans le canal d'écoulement (13), une bague (30) avec une fente annulaire (31) s'étendant sur toute sa longueur axiale et une épaisseur de bague correspondant à la largeur radiale du canal d'écoulement (13) est introduite dans le canal d'écoulement (13).
  3. Soupape selon la revendication 2, caractérisée en ce que la bague (30) possède une section transversale rectangulaire ou ronde.
  4. Soupape selon la revendication 3, caractérisée en ce que la bague (30) est formée d'une bande ou d'un fil ayant une section transversale rectangulaire ou ronde.
  5. Soupape selon l'une quelconque des revendications 2 à 4, caractérisée en ce que la bague (30) dans le canal d'écoulement (13) est fixée au niveau d'au moins une paroi de canal (13a, 13b).
  6. Soupape selon la revendication 5, caractérisée en ce que la bague (30) s'insère par engagement par correspondance de formes en partie dans au moins une rainure annulaire (32) réalisée dans une paroi de canal (13a, 13b).
  7. Soupape selon l'une quelconque des revendications 2 à 6, caractérisée en ce que deux bagues (30) sont disposées l'une derrière l'autre à faible distance au niveau de l'au moins un emplacement du canal dans le canal d'écoulement (13).
  8. Soupape selon la revendication 7, caractérisée en ce que les bagues (30) sont orientées parallèlement l'une à l'autre et de telle sorte que leurs fentes annulaires (31) soient tournées l'une par rapport à l'autre dans le sens périphérique.
  9. Soupape selon la revendication 8, caractérisée en ce que la rotation des fentes annulaires (31) des deux bagues (30) vaut 180°.
  10. Soupape selon la revendication 1, caractérisée en ce que pour réaliser la division et la connexion fluidique au niveau d'au moins un emplacement du canal dans le canal d'écoulement (13), un rétrécissement de la section transversale d'écoulement du canal d'écoulement (13) est effectué.
  11. Soupape selon la revendication 10, caractérisée en ce que le rétrécissement de section transversale est réalisé au moyen d'au moins un ergot (29) s'étendant sur la périphérie d'au moins une paroi de canal (13a, 13b) en saillie depuis celle-ci.
  12. Soupape selon la revendication 11, caractérisée en ce que l'au moins un ergot (29) est fabriqué par un renfoncement (28) imprimé dans la paroi du canal.
  13. Soupape selon la revendication 1, caractérisée en ce qu'une connexion (33) est établie dans la pièce de raccordement (16) depuis l'entrée (11) jusqu'au canal d'écoulement (13) et une chambre de soupape (26) est montée en amont dans le corps de soupape (16) de l'ouverture de dosage (11), laquelle chambre de soupape est connectée au canal d'écoulement (13) par le biais d'un alésage (27) réalisé dans le corps de soupape (17).
EP13702796.7A 2012-03-07 2013-01-30 Soupape de dosage d'un fluide Not-in-force EP2823176B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012203607A DE102012203607A1 (de) 2012-03-07 2012-03-07 Ventil zum Zumessen eines Fluids
PCT/EP2013/051803 WO2013131691A1 (fr) 2012-03-07 2013-01-30 Soupape de dosage d'un fluide

Publications (2)

Publication Number Publication Date
EP2823176A1 EP2823176A1 (fr) 2015-01-14
EP2823176B1 true EP2823176B1 (fr) 2017-04-19

Family

ID=47666131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13702796.7A Not-in-force EP2823176B1 (fr) 2012-03-07 2013-01-30 Soupape de dosage d'un fluide

Country Status (8)

Country Link
US (1) US20150028136A1 (fr)
EP (1) EP2823176B1 (fr)
JP (1) JP5933766B2 (fr)
KR (1) KR20140133851A (fr)
CN (1) CN104350269B (fr)
DE (1) DE102012203607A1 (fr)
RU (1) RU2629851C2 (fr)
WO (1) WO2013131691A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014222454A1 (de) 2014-11-04 2016-05-04 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102014222448A1 (de) 2014-11-04 2016-05-04 Robert Bosch Gmbh Brennstoffeinspritzventil

Citations (1)

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Publication number Priority date Publication date Assignee Title
WO2002036959A2 (fr) * 2000-11-02 2002-05-10 Siemens Aktiengesellschaft Dispositif de dosage de liquide comprenant une zone d'etranglement

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Also Published As

Publication number Publication date
WO2013131691A1 (fr) 2013-09-12
DE102012203607A1 (de) 2013-09-12
CN104350269B (zh) 2017-09-15
US20150028136A1 (en) 2015-01-29
RU2014140230A (ru) 2016-04-27
JP5933766B2 (ja) 2016-06-15
EP2823176A1 (fr) 2015-01-14
JP2015508861A (ja) 2015-03-23
KR20140133851A (ko) 2014-11-20
RU2629851C2 (ru) 2017-09-04
CN104350269A (zh) 2015-02-11

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