EP0914552B1 - Vanne d'alimentation dosee en carburant volatilise - Google Patents

Vanne d'alimentation dosee en carburant volatilise Download PDF

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Publication number
EP0914552B1
EP0914552B1 EP98912262A EP98912262A EP0914552B1 EP 0914552 B1 EP0914552 B1 EP 0914552B1 EP 98912262 A EP98912262 A EP 98912262A EP 98912262 A EP98912262 A EP 98912262A EP 0914552 B1 EP0914552 B1 EP 0914552B1
Authority
EP
European Patent Office
Prior art keywords
valve
section
nozzle
cross
seat 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.)
Expired - Lifetime
Application number
EP98912262A
Other languages
German (de)
English (en)
Other versions
EP0914552A1 (fr
Inventor
Erwin Krimmer
Wolfgang Schulz
Tilman Miehle
Manfred Zimmermann
Maria Esperilla
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 EP0914552A1 publication Critical patent/EP0914552A1/fr
Application granted granted Critical
Publication of EP0914552B1 publication Critical patent/EP0914552B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold

Definitions

  • the invention is based on a valve for metered Discharge from a fuel tank one Internal combustion engine volatilized fuel in one Intake pipe of the internal combustion engine according to the genus of Claim 1.
  • a valve for metered Discharge from a fuel tank one Internal combustion engine volatilized fuel in one Intake pipe of the internal combustion engine according to the genus of Claim 1.
  • Such a valve is already known (DE-PS 42 29 110), which has a valve seat that an edge of an inlet cross-section of a Laval nozzle is formed, on which one of an electromagnet actuatable, cylindrical valve member in Closed position is present.
  • the valve seat also provides an axial limitation of the Laval nozzle.
  • the training the nozzle as a Laval nozzle allows a comparatively high flow rate can be realized to so only one at an intended throughput of the valve to cause relatively low flow resistance.
  • valve according to the invention with the characteristic Features of claim 1 has the advantage that only relatively low even with high flow rates Differential pressures at the valve are required. Especially It is advantageous that only a small valve lift for Control of the flow is required so that a can realize particularly fast switching valve, at which, moreover, only slight variations in the flow rate occur.
  • one Realize valve characteristics, depending on Differential pressure a rapid increase in the flow characteristic at small differential pressures and a constant one Flow at larger differential pressures is available.
  • Valve characteristic of the valve according to the invention in can be changed easily.
  • FIG. 1 shows a Longitudinal section through the valve according to the invention
  • Figure 2 a perspective view of a valve seat body of the Valve according to a first embodiment
  • Figure 3 a Bottom view of a valve seat body of the valve according to a second embodiment.
  • Valve 1 is used for the metered introduction of from a Fuel tank of an internal combustion engine volatilized Fuel in an intake pipe of the internal combustion engine and is Part of a fuel evaporation retention system, not shown a mixture-compressing, spark-ignited Internal combustion engine.
  • the structure and function of such Fuel evaporation restraint systems is one example Bosch technical briefing, engine management Motronic, second edition, August 1993, pages 48 and 49 removable.
  • the structure and mode of operation of a such, also as a regeneration valve or Tank vent valve designated valve 1 is the Expert further known from DE-OS 40 23 044, the Revelation part of the present Patent application should be.
  • the valve 1 has a coaxial to a valve longitudinal axis 2 two-part valve housing with a cylindrical stepped, sleeve-shaped lower housing part 4 and one lid-shaped upper housing part 5.
  • the upper Housing part 5 is on the lower housing part 4 for example put on and encompasses the lower one Housing part 4 on its outer surface.
  • Both housing parts 4, 5 are preferably made of plastic and are, for example inseparable, for example by means of ultrasonic welding or also separable, for example by means of a snap connection connected.
  • the lower housing part 4 carries one Inflow nozzle 8 for connection to one not closer shown vent pipe of a fuel tank Internal combustion engine or connected to one of these Adsorption.
  • the adsorption filter is used in known Way of caching from the fuel tank volatilized fuel vapor and is for example with Activated carbon filled.
  • the upper housing part 5 has one Outflow connector 9 for connecting to an intake pipe Internal combustion engine.
  • the inflow nozzle 8 and the Outflow nozzles 9 are each axially in the housing parts 4 or 5 arranged approximately in alignment with each other.
  • an electromagnet 12 arranged in the Inside the lower housing part 4 . It has a pot-shaped magnet housing 14 a bottom 25 of the magnet housing 14 penetrating, coaxial, hollow cylindrical magnetic core 15 and one cylindrical excitation coil 16 on a coil support 17 sits and the magnetic core 15 in the magnet housing 14 encloses.
  • a one-piece protruding threaded connector 18 formed with an internal thread 19, in which a External thread section 20 on the hollow cylindrical Magnetic core 15 is screwed.
  • the magnetic core 15 has one of the hollow Magnetic core 15 limited, axial through opening 21, so that Fuel vapor in the passage opening 21 from Inflow connector 8 can flow to the outlet connector 9.
  • the magnet housing 14 with the magnet core 15 is so in used the lower housing part 4 that between a Outer jacket 22 of the magnet housing 14 and an inner wall 23 of the lower housing part 4 axial channels 24 remain for example, in the circumferential direction at the same angle are mutually offset, so that as in FIG. 1 is shown, for example, only two axial channels 24 are seen.
  • the axial channels 24 are in the lower one Housing part 4 between the bottom 25 of the magnet housing 14 and the inflow connector 8 located annular space 27 on the one hand with the inflow nozzle 8 and on the other hand via bores 28, the near the open end of the magnet housing 14 in the Magnet housing 14 are introduced with the inside of the Magnet housing 14 downstream of the excitation coil 16 in Connection. Through these axial channels 24 in the Inlet nozzle 8 entering fuel vapor also around that Magnet case 14 flow around and heat generated here dissipate.
  • the magnet housing 14 has a bent edge 29, which as Support flange for a bow-shaped valve seat body 31 serves.
  • the valve seat body 31 forms the yoke of the yoke Electromagnet 12.
  • the valve seat body 31 covers this Magnetic housing 14 partially and is by means of at least two, fitting holes 47 shown in Figures 2 and 3 at the bottom Housing part 4 attached.
  • the one resting on the edge 29 Valve seat body 31 is in a U-shaped Cross-section, elastic, ring-shaped Bearing receptacle 32 added, which in turn between the two housing parts 4 and 5 is clamped.
  • On off existing valve member 36 forms magnetic material at the same time the armature of the electromagnet 12 and is on one Leaf spring 33 attached, the edge between the Valve seat body 31 and the edge 29 is clamped.
  • the Valve seat body 31 has at least one valve opening 34
  • Exemplary embodiments are two slit-shaped valve openings 34 provided, which, as shown in Figure 2, for example, have a semicircular shape and are provided opposite, so that they become one complete fictitious circular shape. But it is also possible how in Figure 3, a plan view of the according to a second Type of valve seat body 31, is shown, the valve openings 34 in a U-shape training that complement each other to form a fictitious rectangle to let.
  • the two valve openings 34 are from the valve member 36 closable so that a valve double seat 37 results.
  • valve member 36 As shown in Figure 1, is in the valve member 36 a coaxial to the hollow cylindrical magnetic core 15 extending through opening 38 is provided through the Inflow nozzle 8 through the through opening 21 of the Magnetic core 15 flowing fuel when open Valve openings 34 can flow into the discharge port 9.
  • the Valve member 36 is from a valve closing spring 43 in Valve closing direction in the direction of the outflow connector 9 acts on the one hand on the valve member 36 and on the other hand, on a sleeve-shaped end 41 of the magnetic core 15 supports.
  • the valve member 36 carries the valve double seat 37 on it facing side a rubber seal 42 made of elastic Material, for example elastomer.
  • the sealing rubber 42 dresses also the through opening 38 and is slightly above one the valve double seat 37 facing away from the valve member 36 beyond.
  • the valve closing spring 43 presses the valve member 36 with the Sealing rubber 42 on the valve double seat 37 and thus closes the valve openings 34.
  • the valve member 36 with its off the through opening 38 protruding sealing rubber 42 against the end 41 of the magnetic core 15 pressed, making a stop 44 for the stroke movement of the valve member 36 forms.
  • the valve closing spring 43 is weak dimensioned because with a pressure drop between Outflow connection 9 and inflow connection 8 have a suction effect the valve member 36 is exerted in the direction of valve closing and supports the closing action of the valve closing spring 43 becomes.
  • the Electromagnet 12 of the control electronics one not closer shown control unit controlled clocked, for what on upper housing part 5, a connector 50 is provided.
  • the cycle rate is determined by the operating state of the Internal combustion engine specified so that the over Valve openings 34 from the inflow nozzle 8 in the Outflow nozzle 9 exceeding flow rate volatilized fuel vapor can be dosed accordingly.
  • the channel that penetrates the outflow nozzle 9 in the form of a Laval nozzle 55, which is in known manner from a convergent part 56 and a divergent part 57 is composed.
  • the Laval nozzle 55 tapers from a first inlet cross-section 60 downstream in the vicinity of the valve seat body 31 narrowest cross section 61, in order then from the narrowest cross section 61 towards an end cross-section 62 at the downstream end expand.
  • the formation of the cross sections 60, 61, 62 takes place in such a way that the inlet cross-section 60 at least is equal to or larger than the end cross section 62.
  • the inlet cross-section 60 is preferably 1.1 to 2 times larger than the final cross section 62.
  • the narrowest cross section 61 is preferably 2 to 4 times smaller than that Entry cross section 60.
  • the between entry cross section 60 and final cross section 62 measured length of the Laval nozzle 55 is, for example, 3 to 5 times larger than a diameter on Inlet cross section 60.
  • the side 49 of the valve seat body 31 has the inlet cross section 60 having inlet side of the outflow connector 9 in Direction of the valve longitudinal axis 2 a distance, so that between page 49, the entry side of the Abströmstutzenens 9 and the sealing ring 51, an intermediate space 63 is formed, which is perpendicular to the valve longitudinal axis 2 has at least one side extension that is as large as the diameter of the inlet cross-section is 60, and in the valve openings 34 open.
  • valve openings 34 of the Valve seat body 31 Since from the valve member 36 to Turn off only the two valve openings 34 of the Valve seat body 31 must be covered, it is possible by simply changing the valve stroke of the Valve member 36 optimally to the narrowest cross section 61 to adapt the Laval nozzle 55 without this one Change in the proportions of the cross sections of the Laval nozzle 55 is required.
  • the two cross sections of the Valve openings 34 are made much smaller an inlet cross-section 60 of the Laval nozzle 55. Preferably the two cross sections together are only about 10 to 20 Percent of the entrance cross-section 60. Because of the relative no cross section of both valve openings 34 can Interruption of fuel flow using the Valve member 36 performed at high speed be, so that a particularly fast switching valve 1 can be realized.
  • the adaptation to the desired one Flow rates of the valve 1 is simple Change the valve lift or by turning the Magnetic core 15 possible in the magnet housing 14.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (11)

  1. Soupape (1) pour l'introduction dosée, dans une tubulure d'admission d'un moteur à combustion interne, de vapeurs de carburant provenant du réservoir alimentant le moteur, comprenant :
    un axe longitudinal de soupape (2),
    un boítier de soupape, présentant une tubulure d'amenée (8) pour raccordement au réservoir de carburant ou à un filtre à adsorption monté en aval de celui-ci et destiné à la vapeur de carburant, et une tubulure de sortie (9) pour raccordement à la tubulure d'admission,
    entre les tubulures d'amenée et de sortie, un organe de soupape (36) qui est monté à l'intérieur du boítier de soupape, qui peut être actionné par un électroaimant (12) comportant un noyau, et qui coopère avec un siège de soupape (37), réalisé sur un corps de soupape (31),
    caractérisée en ce qu'
    il présente une tuyère (55) réalisée dans la tubulure de sortie et composée d'une partie convergente et d'une partie divergente, se faisant suite directement,
    le siège de soupape (37) et la section d'entrée (60) de la tuyère (55) présentent entre eux selon la direction de l'axe longitudinal (2) de la soupape une certaine distance, et
    la section d'au moins une ouverture (34) prévue dans le corps de siège de soupape (31) et entourée par ce siège, est nettement plus petite que la section d'entrée (60) de la tuyère (55).
  2. Soupape selon la revendication 1,
    caractérisée en ce que
    le corps de siège de soupape (31) et la tubulure de sortie (9) sont des pièces originales.
  3. Soupape selon l'une quelconque des revendications 1 ou 2,
    caractérisée en ce que
    le corps de siège de soupape (31) constitue une culasse de reflux de l'électroaimant (12) et est monté dans la soupape (1) à une certaine distance de la section d'entrée (60) de la tuyère (55).
  4. Soupape selon l'une quelconque des revendications 2 ou 3,
    caractérisée en ce qu'
    il est prévu une bague d'étanchéité (51) entre le corps de siège de soupape (31) et la tubulure de sortie (9).
  5. Soupape selon la revendication 1,
    caractérisée en ce que
    la section d'au moins une ouverture (34) représente 10 à 20 pour-cent environ de la surface d'entrée (60) de la tuyère (55).
  6. Soupape selon l'une quelconque des revendications 1 ou 5,
    caractérisée en ce qu'
    il est prévu dans le corps de siège de soupape (31) deux ouvertures (34) ayant la forme d'un anneau en demi-cercle ou la forme d'un U.
  7. Soupape selon la revendication 1,
    caractérisée en ce que
    la section d'entrée (60) de la tuyère (55) est au moins 1,1 à 2 fois plus grande que la section finale (62) de la tuyère (55).
  8. Soupape selon la revendication 1,
    caractérisée en ce que
    la longueur de la buse (55) mesurée entre la section d'entrée (60) et la section de sortie (62) est 3 à 5 fois plus grande que le diamètre de la section d'entrée (60).
  9. Soupape selon la revendication 1,
    caractérisée en ce que
    les sections de la tuyère (55) se suivent sans discontinuité.
  10. Soupape selon la revendication 1,
    caractérisée en ce que
    la course de l'organe de soupape (36) passant de son appui sur le corps de siège de soupape (31) à son appui sur le noyau d'aimant (15), peut être choisie en fonction de la section la plus étroite (61) de la tuyère (55).
  11. Soupape selon la revendication 10,
    caractérisée en ce que
    la course de l'organe de soupape (36) peut être réglée au moyen du noyau d'aimant (15).
EP98912262A 1997-05-23 1998-02-18 Vanne d'alimentation dosee en carburant volatilise Expired - Lifetime EP0914552B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19721562 1997-05-23
DE19721562A DE19721562A1 (de) 1997-05-23 1997-05-23 Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff
PCT/DE1998/000472 WO1998053195A1 (fr) 1997-05-23 1998-02-18 Vanne d'alimentation dosee en carburant volatilise

Publications (2)

Publication Number Publication Date
EP0914552A1 EP0914552A1 (fr) 1999-05-12
EP0914552B1 true EP0914552B1 (fr) 2003-05-07

Family

ID=7830256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98912262A Expired - Lifetime EP0914552B1 (fr) 1997-05-23 1998-02-18 Vanne d'alimentation dosee en carburant volatilise

Country Status (8)

Country Link
US (1) US6149126A (fr)
EP (1) EP0914552B1 (fr)
JP (1) JP2000515606A (fr)
KR (1) KR20000029436A (fr)
BR (1) BR9804944A (fr)
DE (2) DE19721562A1 (fr)
RU (1) RU2195571C2 (fr)
WO (1) WO1998053195A1 (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19839476A1 (de) * 1998-08-29 2000-03-02 Bosch Gmbh Robert Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff
FR2788324A1 (fr) * 1999-01-08 2000-07-13 Sagem Siege de clapet d'electrovanne
DE19901090A1 (de) * 1999-01-14 2000-07-20 Bosch Gmbh Robert Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff
WO2000075502A1 (fr) * 1999-06-08 2000-12-14 Sagem Electrovanne de purge pour dispositif d'evacuation de vapeurs
DE19928207A1 (de) * 1999-06-19 2000-12-21 Bosch Gmbh Robert Magnetventil
DE19935261A1 (de) * 1999-07-27 2001-02-01 Bosch Gmbh Robert Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff in einen Ansaugkanal einer Brennkraftmaschine
ES2167275B1 (es) * 2000-10-20 2003-10-16 Bitron Ind Espana Sa Electrovalvula reguladora de caudal de aire.
US6450152B1 (en) * 2001-06-15 2002-09-17 Siemens Automotive Inc. Low-profile fuel tank isolation valve
DE10156231C1 (de) * 2001-11-15 2003-04-30 Freudenberg Carl Kg Ventil
US7086383B2 (en) * 2003-04-04 2006-08-08 Siemens Vdo Automotive Inc. Permanent magnet digital purge valve
US20050061302A1 (en) * 2003-06-20 2005-03-24 Corey Tatsu Purge valve including a permanent magnet linear actuator
JP2005155712A (ja) * 2003-11-21 2005-06-16 Mitsubishi Electric Corp 電磁弁
DE10360773A1 (de) * 2003-12-23 2005-07-28 Robert Bosch Gmbh Brennstoffeinspritzventil
CN1295431C (zh) * 2004-01-02 2007-01-17 沈开华 发动机多功能数码滤清器
DE602006006806D1 (de) * 2005-02-15 2009-06-25 Reckitt Benckiser Uk Ltd Abdichtungsanordnung für einen unter druck stehenden behälter
GB0503098D0 (en) * 2005-02-15 2005-03-23 Reckitt Benckiser Uk Ltd Spray device
GB0503095D0 (en) * 2005-02-15 2005-03-23 Reckitt Benckiser Uk Ltd Holder
GB0521063D0 (en) * 2005-10-18 2005-11-23 Reckitt Benckiser Uk Ltd Spraying device
JP4166779B2 (ja) * 2005-11-28 2008-10-15 三菱電機株式会社 内燃機関制御装置
US20080000456A1 (en) * 2006-06-30 2008-01-03 Siemens Canada Limited Cost-optimized canister purge valve
GB0623052D0 (en) * 2006-11-18 2006-12-27 Reckitt Benckiser Uk Ltd An assembly
JP5414088B2 (ja) 2008-06-17 2014-02-12 サンデン株式会社 圧縮機
CN201363474Y (zh) * 2009-02-20 2009-12-16 厦门科际精密器材有限公司 一种结构改进的电磁线性阀
JP6176215B2 (ja) * 2014-09-25 2017-08-09 株式会社デンソー 二段切替弁
JP7358038B2 (ja) * 2018-07-18 2023-10-10 株式会社ミクニ 電磁弁
US12404948B2 (en) * 2022-11-24 2025-09-02 Hydrotek Corporation Solenoid valve

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Publication number Priority date Publication date Assignee Title
DE3519292A1 (de) * 1985-05-30 1986-12-04 Robert Bosch Gmbh, 7000 Stuttgart Abgabeanlage zur einleitung von verfluechtigtem kraftstoff in eine brennkraftmaschine
JPS62110087A (ja) * 1985-11-06 1987-05-21 Aisin Seiki Co Ltd 切替弁装置
DE3802664C1 (fr) * 1988-01-29 1988-10-13 Fa. Carl Freudenberg, 6940 Weinheim, De
DE3844453C2 (de) * 1988-12-31 1996-11-28 Bosch Gmbh Robert Ventil zum dosierten Zumischen von verflüchtigtem Kraftstoff zum Kraftstoffluftgemisch einer Brennkraftmaschine
DE4023044A1 (de) 1990-07-20 1992-01-23 Bosch Gmbh Robert Ventil zum dosierten zumischen von verfluechtigtem kraftstoff zum kraftstoffluftgemisch einer brennkraftmaschine
US5188141A (en) * 1991-12-03 1993-02-23 Siemens Automotive Limited Vacuum boost valve
DE4139946C1 (fr) * 1991-12-04 1993-02-04 Fa. Carl Freudenberg, 6940 Weinheim, De
DE4229110C1 (de) * 1992-09-01 1993-10-07 Freudenberg Carl Fa Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Verbrennungskraftmaschine
DE4244113A1 (de) * 1992-12-24 1994-06-30 Bosch Gmbh Robert Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff in einen Ansaugkanal einer Brennkraftmaschine
US5630403A (en) * 1996-06-13 1997-05-20 Siemens Electric Limited Force-balanced sonic flow emission control valve

Also Published As

Publication number Publication date
DE59808243D1 (de) 2003-06-12
KR20000029436A (ko) 2000-05-25
BR9804944A (pt) 1999-08-24
RU2195571C2 (ru) 2002-12-27
EP0914552A1 (fr) 1999-05-12
DE19721562A1 (de) 1998-11-26
JP2000515606A (ja) 2000-11-21
WO1998053195A1 (fr) 1998-11-26
US6149126A (en) 2000-11-21

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