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EP0628137B2 - Valve for the metered supply of vaporised fuel to an inlet pipe of an internal combustion engine - Google Patents

Valve for the metered supply of vaporised fuel to an inlet pipe of an internal combustion engine Download PDF

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Publication number
EP0628137B2
EP0628137B2 EP94900748A EP94900748A EP0628137B2 EP 0628137 B2 EP0628137 B2 EP 0628137B2 EP 94900748 A EP94900748 A EP 94900748A EP 94900748 A EP94900748 A EP 94900748A EP 0628137 B2 EP0628137 B2 EP 0628137B2
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EP
European Patent Office
Prior art keywords
valve
valve closing
electromagnet
end surface
valve seat
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
EP94900748A
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German (de)
French (fr)
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EP0628137B1 (en
EP0628137A1 (en
Inventor
Erwin Krimmer
Wolfgang Schulz
Tilman Miehle
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Robert Bosch GmbH
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Robert Bosch GmbH
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0628137A1 publication Critical patent/EP0628137A1/en
Publication of EP0628137B1 publication Critical patent/EP0628137B1/en
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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
    • 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
    • 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
    • F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
    • 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
    • F02M2025/0845—Electromagnetic valves

Definitions

  • the invention is based on a valve for metered Introducing one from the fuel tank Internal combustion engine volatilized fuel into one Intake duct of the internal combustion engine according to DE-A-4023044, where it is particularly with a clocked activation of the valve position influencing electromagnet to disturb Operating noise due to touch relative to each other moving metal parts can come.
  • US-A-4 901 974 shows a valve for introduction of volatilized fuel in internal combustion engines, that on a rod-shaped anchor Plastic formed valve closing member in a circumferential Groove is locked and with a collar in the open position abuts a bobbin. additionally is a plastic stop body aligned with the core on the anchor arranged.
  • JP-A-2 209 683 is an electromagnetically actuated valve known, the one with an axially extending through opening provided and serving as valve closing body, which in axially guided a bobbin and with a first end face a valve seat and with a second end face to an inner core is directed towards.
  • the anchor In the stepped through opening the anchor is arranged an elastic body that the Fully fills through hole on the first face and radially outward from the armature axis to the valve seat extends.
  • the elastic body projects over the second face of the Anchor partially in the radial direction with a thin radial wall, from the end of which there is an elevation in the axial direction extends to the inner core when electromagnetic excitation the anchor is first applied to the inner core and deformed until then the radial wall comes to rest on the inner core.
  • valve according to the invention In contrast, features of the main claim the advantage that a disturbing noise is avoided when operating the valve.
  • valve according to the invention improved wear resistance due to a collision metallic moving relative to each other Parts are prevented or weakened.
  • FIG. 1 shows a longitudinal section of a first exemplary embodiment of a valve according to the invention
  • Figure 2 is a partial section corresponding to the first embodiment the dash-dotted line in Figure 1
  • Figure 3 one Partial section of a second embodiment of an inventive Valve.
  • the valve shown in Figure 1 for metered admixing from the fuel tank of a mixture compressing, spark-ignited internal combustion engine Fuel to one of the internal combustion engine fuel / air mixture supplied via an intake duct, hereinafter referred to as the tank ventilation valve, is used in a dispensing system to initiate volatilized fuel in an internal combustion engine used as this in DE 35 19 292 Al (US 4 763 635).
  • the tank vent valve points a two-part valve housing 10 with a cup-shaped Housing part 101 and a final cap-shaped housing part 102.
  • the housing part 101 carries an inlet connection 11 for connection a fuel tank vent or on a downstream one, filled with activated carbon Vaporized fuel storage while the housing part 102 has an outflow connection 12 for connection to the intake pipe of the internal combustion engine wearing.
  • Inflow connection 11 and outflow connection 12 are respectively arranged axially in the housing parts 101 and 102.
  • Electromagnet 13 Inside the cup-shaped housing part 101 is a Electromagnet 13 arranged.
  • the electromagnet 13 has a pot-shaped magnet housing 14 with a penetrating the bottom of the pot, coaxial, hollow cylindrical magnetic core 15 and a cylindrical excitation coil 16 on a Coil carrier 17 is seated in the magnet housing 14 Magnetic core 15 encloses.
  • a pot-shaped magnet housing 14 with a penetrating the bottom of the pot, coaxial, hollow cylindrical magnetic core 15 and a cylindrical excitation coil 16 on a Coil carrier 17 is seated in the magnet housing 14
  • Magnetic core 15 encloses.
  • Threaded connector 18 formed with an internal thread 19, that with an external thread portion 20 of hollow cylindrical magnetic core 15 is screwed.
  • the Magnetic core 15 can therefore be rotated in the magnet housing 14 are axially displaced.
  • the magnetic core 15 is aligned with the inflow nozzle 11, so that the flowing in here evaporated Fuel gets directly into the magnetic core 15 and this flows through.
  • the magnet housing 14 and the this screwed magnetic core 15 is so in the Pot-shaped housing part 101 used that between the outer shell of the magnet housing 14 and the Inner casing of the valve housing 10 axial channels remain, the circumferential direction at the same angle to each other are offset.
  • Figure 1 are, for example two diametrically opposed axial channels 21, 22.
  • the edge of the magnet housing 14 is on the outside angled to an annular support flange 25, the end of an axially projecting ring web 26th is bent.
  • the support flange 25 serves to receive a Yoke 27, which covers the magnet housing 14 and rests against the ring web 26 at the edge.
  • the Yoke 27 is seated by means of at least two Fitting holes 28 in the cap-shaped housing part 102 trained retaining pin 29 on the the housing part 101 facing the underside of the same axially.
  • valve openings 34 are provided, which by means of a between the yoke 27 and the magnetic core 15 arranged valve closing member 37 can be closed are.
  • the valve closing member 37 is made of magnetically conductive Made of material and at the same time forms the anchor of the electromagnet 13.
  • the valve closing member 37 is by a valve closing spring 49 in the valve closing direction applied.
  • valve closing spring 49 is supported on the one hand on the valve closing member 37 and on the other hand on one on the inner wall of the hollow cylindrical Magnetic core 15 formed annular support shoulder 50 off.
  • electromagnet 13 By energizing the electromagnet 13 is the valve closing member 37 against the force the valve closing spring 49 away from the valve opening 34 Can be operated in the valve opening direction.
  • the outflow connector 12 is in one on the housing part 102 snapped coaxially shaped receptacle 43.
  • a valve seat projecting inward on the shoulder of the ring 44 of a check valve 45 are formed which a valve body 46 is pressed by a valve spring 47 becomes.
  • the valve spring 47 is supported in a Outflow connector 12 provided abutment 48.
  • the check valve 45 is required in particular if the tank vent valve in so-called Loader motors are to be used.
  • FIG 2 shows a partial section of that shown in Figure 1 first embodiment of an inventive Tank vent valve according to the dash-dotted line Line in Figure 1.
  • the hollow cylindrical magnetic core 15 of the electromagnet 13 is on the excitation coil 16 located around the coil carrier 17.
  • the valve closing member is supported on the support shoulder 50 37 acting valve closing spring 49 from.
  • the yoke 27 points to the magnetic core 15 directed side in the axial direction cylindrical recess 30.
  • the plate or disc-shaped trained valve closing member 37 projects into the Well 30 and has a slightly smaller diameter than the recess 30, so that between the circumference of the Valve closing member 37 and wall of recess 30 a radial gap 31 remains.
  • the radial gap 31 is like this dimensioned that the valve closing member 37 with its Scope in the recess 30 guided axially becomes.
  • On the base of the recess 30 are in the area for example two valve openings 34 two Raised valve seats 32 are formed which have a double valve seat form.
  • the yoke 27 has accordingly the function of a valve seat body of the tank ventilation valve.
  • valve closing member 37 there are at least three axial ones Through holes 33 arranged on a imaginary circle with the same distance from each other.
  • the through holes 33 are from one Damper element 35 protrudes.
  • first end face 38 of the valve closing member 37 extends the damper element 35 in the radial direction and in the circumferential direction over at least a portion 36 which is at least the same is at least as large as that formed on the valve seat body 27 a valve seat 32.
  • the damper element 35 seals with its over the first end face 38 of the Valve closing member 37 extending portion in Valve closed position, the valve openings 34 and dampens you after switching off the power due to the force of the valve closing spring 49 resulting Impact of the valve closing member 37 from the valve opening position out on the valve seat 32.
  • the Damper element 35 accordingly forms on the first Front of the valve closing member 37 is also a first Damping surface 40.
  • the stop body 54 is annular, for example formed and pressed on the end of the magnetic core 15.
  • the damper element 35 is made of rubber-like material formed by vulcanization with the valve closing member 37 can be connected.
  • the damping effect of the damper element 35 is based in particular on the creation of internal friction in an impact-related Deformation of the damper element 35.
  • designing the stop ring 54 made of non-magnetic material can be an unfavorable Influencing the magnetic field geometry of the Avoid tank vent valve. Otherwise, the Stop surface 55 also formed by the magnetic core 15 itself become.
  • FIG. 3 shows a second exemplary embodiment in a partial section of a tank ventilation valve according to the invention.
  • the same and equivalent parts are by the same reference numerals as in Figures 1 and 2 marked.
  • a major difference from The first embodiment consists of the arrangement of the damper element 35 and the valve closing spring 49.
  • the damper element 35 also extends here over the partial area 36, which is at least the same size at least as formed on the valve seat body 37 a valve seat 32. Starting from the first partial area 36 the damper element 35 extends radially inwards to the through opening 51 and from there axially along the boundary wall 52 the through opening 51 lining up to the second end face 39 of the valve closing member 37. There it closes approximately axially flush the second end face 39 and forms the second there Damping surface 41.
  • the damper element 35 can on its second damping surface 41, for example also be hump-like and / or over the outer contour of the valve closing member 37 protrude.
  • the second damping surface 41 Opposite the second damping surface 41 is located on the end face 56 of the magnetic core 15 an axially projecting paragraph, which as Stop surface 55 for the second damping surface 41 serves.
  • the valve closing spring 49 encompasses the in FIG Magnetic core 15 and is at least partially by this projects through.
  • the support shoulder 50 is also on the outer circumference of the magnetic core 15 arranged.

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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)
  • Feeding And Controlling Fuel (AREA)
  • Lift Valve (AREA)

Abstract

In a prior art tank venting valve, especially with pulsed control of an electromagnet adjusting the position of the tank venting valve, undesirable operating noises can arise owing to contact between relatively moving metal components, and this is to be prevented. The valve closer (37) has at least one damper (35) which axially completely passes through the valve closer (37) and forms a first damping surface (40) directed towards the valve seat (27) on the first face (38) of the valve closer (37) and a second damping surface (41) directed towards the electromagnet (13) on the second face (39) of the valve closer (37) so as to prevent or damp any impact of the valve close (37) on the valve seat (27) or on the magnet core (15). The tank venting valve of the invention is suitable for the metered supply of vaporised fuel from the fuel tank of a compressed-mixture, spark ignition internal combustion engine to one of its inlet pipes.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Ventil zum dosierten Einleiten von aus dem Brennstofftank einer Brennkraftmaschine verflüchtigtem Brennstoff in einen Ansaugkanal der Brennkraftmaschine nach der DE-A-4023044, bei dem es insbesondere bei einer getakteten Ansteuerung eines die Ventilstellung beeinflußenden Elektromagneten zu störenden Betriebsgeräuschen infolge einer Berührung relativ zueinander bewegter metallischer Teile kommen kann.The invention is based on a valve for metered Introducing one from the fuel tank Internal combustion engine volatilized fuel into one Intake duct of the internal combustion engine according to DE-A-4023044, where it is particularly with a clocked activation of the valve position influencing electromagnet to disturb Operating noise due to touch relative to each other moving metal parts can come.

Die US-A-4 901 974 zeigt ein Ventil zum Einleiten von verflüchtigtem Brennstoff in Brennkraftmaschinen, bei dem an einem stangenförmigen Anker das aus Kunststoff ausgebildete Ventilschließglied in einer umlaufenden Nut verrastet ist und mit einem Kragen in Öffnungsstellung an einem Spulenkörper anliegt. Zusätzlich ist am Anker ein auf den Kern ausgerichteter Kunststoffanschlagkörper angeordnet.US-A-4 901 974 shows a valve for introduction of volatilized fuel in internal combustion engines, that on a rod-shaped anchor Plastic formed valve closing member in a circumferential Groove is locked and with a collar in the open position abuts a bobbin. additionally is a plastic stop body aligned with the core on the anchor arranged.

Aus der JP-A-2 209 683 ist ein elektromagnetisch betätigbares Ventil bekannt, das einen mit einer axial verlaufenden Durchgangsöffnung versehenen und als Ventilschließkörper dienenden Anker hat, der in einem Spulenkörper axial geführt und mit einer ersten Stirnseite zu einem Ventilsitz und mit einer zweiten Stirnseite zu einem Innenkern hin gerichtet ist. In der gestuft ausgebildeten Durchgangsöffnung des Ankers ist ein elastischer Körper angeordnet, der die Durchgangsöffnung an der erten Stirnseite vollständig ausfüllt und sich von der Ankerachse radial nach außen bis zum Ventilsitz erstreckt. Der elastische Körper überragt die zweite Stirnseite des Ankers teilweise in radialer Richtung mit einer dünnen Radialwand, von deren Ende sich in axialer Richtung eine Erhebung in Richtung zum Innenkern erstreckt, die bei einer elektromagnetischen Erregung des Ankers an den Innenkern zuerst angelegt und verformt wird, bis danach die Radialwand zur Anlage an dem Innenkern kommt.From JP-A-2 209 683 is an electromagnetically actuated valve known, the one with an axially extending through opening provided and serving as valve closing body, which in axially guided a bobbin and with a first end face a valve seat and with a second end face to an inner core is directed towards. In the stepped through opening the anchor is arranged an elastic body that the Fully fills through hole on the first face and radially outward from the armature axis to the valve seat extends. The elastic body projects over the second face of the Anchor partially in the radial direction with a thin radial wall, from the end of which there is an elevation in the axial direction extends to the inner core when electromagnetic excitation the anchor is first applied to the inner core and deformed until then the radial wall comes to rest on the inner core.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Ventil mit den Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß eine störende Geräuschbildung beim Betrieb des Ventils vermieden wird.The valve according to the invention In contrast, features of the main claim the advantage that a disturbing noise is avoided when operating the valve.

Darüberhinaus weist das erfindungsgemäße Ventil eine verbesserte Verschleißresistenz auf, da ein Aufeinanderprallen relativ zueinander bewegter metallischer Teile verhindert bzw. abgeschwächt wird.In addition, the valve according to the invention improved wear resistance due to a collision metallic moving relative to each other Parts are prevented or weakened.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Ventils möglich.By those listed in the subclaims Measures are advantageous further training and improvements of that stated in the main claim Valve possible.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Längsschnitt eines ersten Ausführungsbeispiels eines erfindungsgemäßen Ventils, Figur 2 einen Teilschnitt des ersten Ausführungsbeispiels entsprechend der strichpunktierten Linie in Figur 1 und Figur 3 einen Teilschnitt eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Ventils.Embodiments of the invention are in the Drawing shown in simplified form and in the following Description explained in more detail. It shows figure 1 shows a longitudinal section of a first exemplary embodiment of a valve according to the invention, Figure 2 is a partial section corresponding to the first embodiment the dash-dotted line in Figure 1 and Figure 3 one Partial section of a second embodiment of an inventive Valve.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Das in Figur 1 dargestellte Ventil zum dosierten Zumischen von aus dem Brennstofftank einer gemischverdichtenden, fremdgezündeten Brennkraftmaschine verflüchtigtem Brennstoff zu einem der Brennkraftmaschine über einen Ansaugkanal zugeführten Brennstoff/Luft-Gemisch, im folgenden Tankentlüftungsventil ge-nannt, wird in einer Abgabeanlage zur Einleitung von verflüchtigtem Brennstoff in eine Brennkraftmaschine verwendet, wie diese in der DE 35 19 292 Al (US 4 763 635) beschrieben ist. Das Tankentlüftungsventil weist ein zweiteiliges Ventilgehäuse 10 mit einem topfförmigen Gehäuseteil 101 und einem dieses abschließenden kappenförmigen Gehäuseteil 102 auf. Der Gehäuseteil 101 trägt einen Zuströmstutzen 11 zum Anschließen an einen Entlüftungsstutzen des Brennstofftanks oder an einen diesem nachgeschalteten, mit Aktivkohle gefüllten Speicher für den verflüchtigten Brennstoff, während der Gehäuseteil 102 einen Abströmstutzen 12 zum Anschließen an das Ansaugrohr der Brennkraftmaschine trägt. Zuströmstutzen 11 und Abströmstutzen 12 sind jeweils axial in den Gehäuseteilen 101 bzw. 102 angeordnet. Im Innem des topfförmigen Gehäuseteils 101 ist ein Elektromagnet 13 angeordnet.The valve shown in Figure 1 for metered admixing from the fuel tank of a mixture compressing, spark-ignited internal combustion engine Fuel to one of the internal combustion engine fuel / air mixture supplied via an intake duct, hereinafter referred to as the tank ventilation valve, is used in a dispensing system to initiate volatilized fuel in an internal combustion engine used as this in DE 35 19 292 Al (US 4 763 635). The tank vent valve points a two-part valve housing 10 with a cup-shaped Housing part 101 and a final cap-shaped housing part 102. The housing part 101 carries an inlet connection 11 for connection a fuel tank vent or on a downstream one, filled with activated carbon Vaporized fuel storage while the housing part 102 has an outflow connection 12 for connection to the intake pipe of the internal combustion engine wearing. Inflow connection 11 and outflow connection 12 are respectively arranged axially in the housing parts 101 and 102. Inside the cup-shaped housing part 101 is a Electromagnet 13 arranged.

Der Elektromagnet 13 weist ein topfförmiges Magnetgehäuse 14 mit einem den Topfboden durchdringenden, koaxialen, hohlzylindrischen Magnetkern 15 und eine zylindrische Erregerspule 16 auf, die auf einem Spulenträger 17 sitzt, der im Magnetgehäuse 14 den Magnetkern 15 umschließt. Am Boden des Magnetgehäuses 14 ist einstückig ein nach außen vorspringender Gewindestutzen 18 mit einem Innengewinde 19 ausgebildet, das mit einem Außengewindeabschnitt 20 des hohlzylindrischen Magnetkerns 15 verschraubt ist. Der Magnetkern 15 kann daher durch Drehen im Magnetgehäuse 14 axial verschoben werden.The electromagnet 13 has a pot-shaped magnet housing 14 with a penetrating the bottom of the pot, coaxial, hollow cylindrical magnetic core 15 and a cylindrical excitation coil 16 on a Coil carrier 17 is seated in the magnet housing 14 Magnetic core 15 encloses. At the bottom of the magnet housing 14 is in one piece an outwardly projecting Threaded connector 18 formed with an internal thread 19, that with an external thread portion 20 of hollow cylindrical magnetic core 15 is screwed. The Magnetic core 15 can therefore be rotated in the magnet housing 14 are axially displaced.

Der Magnetkern 15 fluchtet mit dem Zuströmstutzen 11, so daß der hier einströmende verflüchtigte Brennstoff direkt in den Magnetkern 15 gelangt und diesen durchströmt. Das Magnetgehäuse 14 und der mit diesem verschraubte Magnetkern 15 ist dabei so in dem topfförmigen Gehäuseteil 101 eingesetzt, daß zwischen dem Außenmantel des Magnetgehäuses 14 und dem Innenmantel des Ventilgehäuses 10 Axialkanäle verbleiben, die in Umfangsrichtung um gleiche Winkel gegeneinander versetzt sind. In der Figur 1 sind beispielsweise zwei sich diametral gegenüberliegende Axialkanäle 21, 22 dargestellt. Die Axialkanäle 21, 22 stehen einerseits über einem Ringraum 23, der zwischen dem Ventilgehäuse 10 und dem Außengewindeabschnitt 20 des Magnetkerns 15 verbleibt, mit dem Zuströmstutzen 11 und andererseits über Bohrungen 24, die nahe zum offenen Ende des Magnetgehäuses 14 im Magnetgehäuse 14 eingebracht sind, mit dem Innern des Magnetgehäuses 14 in Verbindung.The magnetic core 15 is aligned with the inflow nozzle 11, so that the flowing in here evaporated Fuel gets directly into the magnetic core 15 and this flows through. The magnet housing 14 and the this screwed magnetic core 15 is so in the Pot-shaped housing part 101 used that between the outer shell of the magnet housing 14 and the Inner casing of the valve housing 10 axial channels remain, the circumferential direction at the same angle to each other are offset. In Figure 1 are, for example two diametrically opposed axial channels 21, 22. The axial channels 21, 22 are on the one hand via an annular space 23 which is between the Valve housing 10 and the external thread section 20 of the magnetic core 15 remains with the inflow neck 11 and on the other hand via holes 24 which are close to open end of the magnet housing 14 in the magnet housing 14 are introduced with the inside of the magnet housing 14 in connection.

Durch diese Axialkanäle 21, 22 strömt der aus dem Zuströmstutzen 11 austretende verflüchtigte Brennstoff auch um das Magnetgehäuse 14 und führt hier entstehende Wärme ab.Through these axial channels 21, 22 flows out of the Inlet 11 emerging volatilized fuel also around the magnet housing 14 and leads here to arise Heat.

Der Rand des Magnetgehäuses 14 ist nach außen zu einem ringförmigen Auflageflansch 25 abgewinkelt, der endseitig zu einem axial vorstehenden Ringsteg 26 umgebogen ist.The edge of the magnet housing 14 is on the outside angled to an annular support flange 25, the end of an axially projecting ring web 26th is bent.

Der Auflageflansch 25 dient zur Aufnahme eines Rückschlußjoches 27, das das Magnetgehäuse 14 abdeckt und randseitig an dem Ringsteg 26 anliegt. Das Rückschlußjoch 27 sitzt mittels wenigstens zweier Paßlöcher 28 auf im kappenförmigen Gehäuseteil 102 ausgebildeten Haltezapfen 29, die auf der dem Gehäuseteil 101 zugekehrten Unterseite desselben axial vorstehen. Beim Zusammenfügen vom kappenartigen Gehäuseteil 102 und topfartigen Gehäuseteil 101 wird das Rückschlußjoch 27 paßgenau in den Auflageflansch 25 mit dem Ringsteg 26 eingelegt und darin festgeklemmt. Im Rückschlußjoch 27 befindet sich wenigstens eine Ventilöffnung 34, durch die der durch den Zuströmstutzen 11 in den topfförmigen Gehäuseteil 101 strömende verflüchtigte Brennstoff zum Abströmstutzen 12 gelangen kann. Bei dem Ausführungsbeispiel nach Fig. 1 sind zwei Ventilöffnungen 34 vorgesehen, die mittels eines zwischen dem Rückschlußjoch 27 und dem Magnetkern 15 angeordneten Ventilschließgliedes 37 verschließbar sind. Zentral im Ventilschließglied 37 befindet sich koaxial zum hohlzylindrischen Magnetkern 15 eine axiale Durchgangsöffnung 51 mit einer Begrenzungswand 52 (Figur 2 und 3), durch die vom Zuströmstutzen 11 herkommender verflüchtigter Brennstoff bei geöffneter Ventilöffnung 34 zum Abströmstutzen 12 gelangen kann. Das Ventilschließglied 37 ist aus magnetisch leitendem Material hergestellt und bildet zugleich den Anker des Elektromagneten 13. Das Ventilschließglied 37 wird von einer Ventilschließfeder 49 in Ventilschließrichtung beaufschlagt. Die Ventilschließfeder 49 stützt sich dabei einerseits am Ventilschließglied 37 und andererseits an einer an der Innenwand des hohlzylindrischen Magnetkerns 15 ausgebildeten ringförmigen Stützschulter 50 ab. Durch Bestromung des Elektromagneten 13 ist das Ventilschließglied 37 entgegen der Kraft der Ventilschließfeder 49 von der Ventilöffnung 34 weg in Ventilöffnungsrichtung betätigbar.The support flange 25 serves to receive a Yoke 27, which covers the magnet housing 14 and rests against the ring web 26 at the edge. The Yoke 27 is seated by means of at least two Fitting holes 28 in the cap-shaped housing part 102 trained retaining pin 29 on the the housing part 101 facing the underside of the same axially. When assembling the cap-like housing part 102 and pot-like housing part 101 will Inference yoke 27 fits snugly into the support flange 25 inserted with the ring web 26 and clamped therein. In the yoke 27 there is at least one Valve opening 34 through which the through the inlet nozzle 11 flowing into the pot-shaped housing part 101 volatilized fuel reach the outflow nozzle 12 can. 1 in the embodiment Two valve openings 34 are provided, which by means of a between the yoke 27 and the magnetic core 15 arranged valve closing member 37 can be closed are. Located coaxially in the valve closing member 37 an axial to the hollow cylindrical magnetic core 15 Through opening 51 with a boundary wall 52 (Figures 2 and 3), by coming from the inflow 11 volatilized fuel when open Valve opening 34 reach the outlet port 12 can. The valve closing member 37 is made of magnetically conductive Made of material and at the same time forms the anchor of the electromagnet 13. The valve closing member 37 is by a valve closing spring 49 in the valve closing direction applied. The valve closing spring 49 is supported on the one hand on the valve closing member 37 and on the other hand on one on the inner wall of the hollow cylindrical Magnetic core 15 formed annular support shoulder 50 off. By energizing the electromagnet 13 is the valve closing member 37 against the force the valve closing spring 49 away from the valve opening 34 Can be operated in the valve opening direction.

Die dem Ventilschließglied 37 abgekehrte Rückseite des Rückschlußjochs 27 ist durch einen Dichtungsring 42 gegenüber dem Gehäuseteil 102 abgedichtet, so daß Leckverluste über die Verbindung von Rückschlußjoch 27 und Magnetgehäuse 14 vermieden werden. Der Abströmstutzen 12 ist in einen am Gehäuseteil 102 koaxial ausgeformten Aufnahmestutzen 43 eingerastet. Im Aufnahmestutzen 43 kann auf einer radial nach innen vorspringenden Ringschulter ein Ventilsitz 44 eines Rückschlagventils 45 ausgebildet sein, auf dem ein Ventilkörper 46 durch eine Ventilfeder 47 aufgepreßt wird. Die Ventilfeder 47 stützt sich in einem im Abströmstutzen 12 vorgesehenen Wiederlager 48 ab. Das Rückschlagventil 45 ist insbesondere dann erforderlich, wenn das Tankentlüftungsventil in sogenannten Ladermotoren eingesetzt werden soll.The rear facing away from the valve closing member 37 the yoke 27 is through a sealing ring 42 sealed against the housing part 102, so that leakage losses through the connection of the yoke 27 and magnet housing 14 can be avoided. The outflow connector 12 is in one on the housing part 102 snapped coaxially shaped receptacle 43. In the receptacle 43 can be radial a valve seat projecting inward on the shoulder of the ring 44 of a check valve 45 are formed which a valve body 46 is pressed by a valve spring 47 becomes. The valve spring 47 is supported in a Outflow connector 12 provided abutment 48. The check valve 45 is required in particular if the tank vent valve in so-called Loader motors are to be used.

Figur 2 zeigt einen Teilschnitt des in Figur 1 gezeigten ersten Ausführungsbeispiels eines erfindungsgemäßen Tankentlüftungsventils entsprechend der strichpunktierten Linie in Figur 1. Der hohlzylindrische Magnetkern 15 des Elektromagneten 13 ist von der auf dem Spulenträger 17 befindlichen Erregerspule 16 umgeben. An der Stützschulter 50 stützt sich die das Ventilschließglied 37 beaufschlagende Ventilschließfeder 49 ab. Das Rückschlußjoch 27 weist auf seiner zum Magnetkern 15 gerichteten Seite in axialer Richtung eine zylindrische Vertiefung 30 auf. Das plattenoder scheibenförmig ausgebildete Ventilschließglied 37 ragt in die Vertiefung 30 und hat einen etwas kleineren Durchmesser als die Vertiefung 30, so daß zwischen Umfang des Ventilschließgliedes 37 und Wandung der Vertiefung 30 ein Radialspalt 31 verbleibt. Der Radialspalt 31 ist so dimensioniert, daß das Ventilschließglied 37 mit seinem Umfang in der Vertiefung 30 axial verschiebbar geführt wird. An der Grundfläche der Vertiefung 30 sind im Bereich der beispielsweise zwei Ventilöffnungen 34 zwei erhabene Ventilsitze 32 ausgebildet, die einen Ventildoppelsitz bilden. Das Rückschlußjoch 27 hat demnach die Funktion eines Ventilsitzkörpers des Tankentlüftungsventils.Figure 2 shows a partial section of that shown in Figure 1 first embodiment of an inventive Tank vent valve according to the dash-dotted line Line in Figure 1. The hollow cylindrical magnetic core 15 of the electromagnet 13 is on the excitation coil 16 located around the coil carrier 17. The valve closing member is supported on the support shoulder 50 37 acting valve closing spring 49 from. The yoke 27 points to the magnetic core 15 directed side in the axial direction cylindrical recess 30. The plate or disc-shaped trained valve closing member 37 projects into the Well 30 and has a slightly smaller diameter than the recess 30, so that between the circumference of the Valve closing member 37 and wall of recess 30 a radial gap 31 remains. The radial gap 31 is like this dimensioned that the valve closing member 37 with its Scope in the recess 30 guided axially becomes. On the base of the recess 30 are in the area for example two valve openings 34 two Raised valve seats 32 are formed which have a double valve seat form. The yoke 27 has accordingly the function of a valve seat body of the tank ventilation valve.

Im Ventilschließglied 37 sind wenigstens drei axiale Durchgangsbohrungen 33 angeordnet, die auf einem gedachten Kreis mit gleichem Abstand zueinander liegen. Die Durchgangsbohrungen 33 werden von einem Dämpferelement 35 durchragt. Auf einer zum Ventildoppelsitz 32 gerichteten ersten Stirnseite 38 des Ventilschließgliedes 37 erstreckt sich das Dämpferelement 35 in radialer Richtung und in Umfangsrichtung über wenigstens einen Teilbereich 36, der wenigstens gleich groß ist wie der am Ventilsitzkörper 27 ausgebildete wenigstens eine Ventilsitz 32. Das Dämpferelement 35 dichtet mit seinem sich über die erste Stirnseite 38 des Ventilschließgliedes 37 erstreckenden Teilbereich in Ventilschließstellung die Ventilöffnungen 34 ab und dämpft einen sich nach Abschalten der Bestromung aufgrund der Kraft der Ventilschließfeder 49 ergebenden Aufprall des Ventilschließgliedes 37 aus der Ventilöffnungsstellung heraus auf den Ventilsitz 32 ab. Das Dämpferelement 35 bildet demnach auf der ersten Stirnseite des Ventilschließgliedes 37 zugleich eine erste Dämpfungsfläche 40.In the valve closing member 37 there are at least three axial ones Through holes 33 arranged on a imaginary circle with the same distance from each other. The through holes 33 are from one Damper element 35 protrudes. On one to the valve double seat 32 directed first end face 38 of the valve closing member 37 extends the damper element 35 in the radial direction and in the circumferential direction over at least a portion 36 which is at least the same is at least as large as that formed on the valve seat body 27 a valve seat 32. The damper element 35 seals with its over the first end face 38 of the Valve closing member 37 extending portion in Valve closed position, the valve openings 34 and dampens you after switching off the power due to the force of the valve closing spring 49 resulting Impact of the valve closing member 37 from the valve opening position out on the valve seat 32. The Damper element 35 accordingly forms on the first Front of the valve closing member 37 is also a first Damping surface 40.

Auf einer zum Magnetkern 15 gerichteten zweiten Stirnseite 39 des Ventilschließgliedes 37 steht das Dämpferelement 35 im Bereich der Durchgangsbohrungen 33 höckerartig über die Außenkontur des Ventilschließgliedes 37 hervor. Das Dämpferelement 35 bildet damit auf der zweiten Stirnseite 39 im Bereich der Durchgangsbohrungen 33 Dämpfungsteilflächen, die zusammen eine zweite Dämpfungsfläche 41 ergeben. Bei ausreichend bestromten Elektromagneten 13 liegt das Dämpferelement 35 mit seiner zweiten Dämpfungsfläche 41 an einer von einem Anschlagkörper 54 gebildeten Anschlagfläche 55 an. Auf diese Weise läßt sich ein metallischer Aufprall des Ventilschließgliedes 37 mit seiner zweiten Stirnseite 39 an einer gegenüberliegenden Stirnfläche 56 des Magnetkerns 15 verhindern bzw. dämpfen.On a second directed towards the magnetic core 15 Front 39 of the valve closing member 37 is Damper element 35 in the area of the through holes 33 bump-like over the outer contour of the valve closing member 37 out. The damper element 35 forms thus on the second end face 39 in the area of Through holes 33 damping partial surfaces, the together result in a second damping surface 41. When the electromagnet 13 is sufficiently energized the damper element 35 with its second damping surface 41 on one formed by a stop body 54 Stop surface 55 on. In this way a metallic impact of the valve closing member 37 with its second end face 39 on an opposite Prevent or end face 56 of the magnetic core 15 or dampen.

Der Anschlagkörper 54 ist beispielsweise ringförmig ausgebildet und endseitig am Magnetkern 15 aufgepreßt.The stop body 54 is annular, for example formed and pressed on the end of the magnetic core 15.

Durch eine Drehung des Magnetkerns 15 läßt sich die Anschlagfläche 55 gemeinsam mit der Stirnfläche 56 mittels des von Innengewinde 19 und Außengewindeabschnitt 20 (Figur 1) gebildeten Einstellgewindes axial verstellen. Zwischen Anschlagkörper 54 und Spulenkörper 17 kann sich daher ein mehr oder weniger großer axialer Spalt bilden.By rotating the magnetic core 15 the stop surface 55 together with the end face 56 by means of the internal thread 19 and external thread section 20 (Figure 1) formed adjustment thread adjust axially. Between stop body 54 and bobbin 17 can therefore be a more or less form a large axial gap.

Das Dämpferelement 35 ist aus gummiartigem Material gebildet, das durch Vulkanisieren mit dem Ventilschließglied 37 verbunden sein kann. Die Dämpfungswirkung des Dämpferelements 35 beruht insbesondere auf der Entstehung von innerer Reibung bei einer aufprallbedingten Verformung des Dämpferelements 35. Durch die beispielsweise Ausbildung des Anschlagrings 54 aus nichtmagnetischem Werkstoff läßt sich eine ungünstige Beeinflussung der Magnetfeldgeometrie des Tankentlüftungsventils vermeiden. Im übrigen kann die Anschlagfläche 55 auch vom Magnetkern 15 selbst gebildet werden.The damper element 35 is made of rubber-like material formed by vulcanization with the valve closing member 37 can be connected. The damping effect of the damper element 35 is based in particular on the creation of internal friction in an impact-related Deformation of the damper element 35. By, for example, designing the stop ring 54 made of non-magnetic material can be an unfavorable Influencing the magnetic field geometry of the Avoid tank vent valve. Otherwise, the Stop surface 55 also formed by the magnetic core 15 itself become.

Figur 3 zeigt in einem Teilschnitt ein zweites Ausführungsbeispiel eines erfindungsgemäßen Tankentlüftungsventils. Gleiche und gleichwirkende Teile sind durch gleiche Bezugszeichen wie in den Figuren 1 und 2 gekennzeichnet. Ein wesentlicher Unterschied zum ersten Ausführungsbeispiel besteht in der Anordnung des Dämpferelements 35 und der Ventilschließfeder 49. Das Dämpferelement 35 erstreckt sich hier ebenfalls über den Teilbereich 36, der wenigstens gleich groß ist wie der am Ventilsitzkörper 37 ausgebildete wenigstens eine Ventilsitz 32. Vom ersten Teilbereich 36 ausgehend erstreckt sich das Dämpferelement 35 radial nach innen bis zur Durchgangsöffnung 51 und von dort axial entlang der Begrenzungswand 52 die Durchgangsöffnung 51 auskleidend bis zur zweiten Stirnseite 39 des Ventilschließgliedes 37. Dort schließt es etwa axial bündig mit der zweiten Stirnfläche 39 ab und bildet dort die zweite Dämpfungsfläche 41. Das Dämpferelement 35 kann an seiner zweiten Dämpfungsfläche 41 beispielsweise ebenfalls höckerartig ausgebildet sein und/oder über die Außenkontur des Ventilschließgliedes 37 hinausragen.FIG. 3 shows a second exemplary embodiment in a partial section of a tank ventilation valve according to the invention. The same and equivalent parts are by the same reference numerals as in Figures 1 and 2 marked. A major difference from The first embodiment consists of the arrangement of the damper element 35 and the valve closing spring 49. The damper element 35 also extends here over the partial area 36, which is at least the same size at least as formed on the valve seat body 37 a valve seat 32. Starting from the first partial area 36 the damper element 35 extends radially inwards to the through opening 51 and from there axially along the boundary wall 52 the through opening 51 lining up to the second end face 39 of the valve closing member 37. There it closes approximately axially flush the second end face 39 and forms the second there Damping surface 41. The damper element 35 can on its second damping surface 41, for example also be hump-like and / or over the outer contour of the valve closing member 37 protrude.

Gegenüberliegend der zweiten Dämpfungsfläche 41 befindet sich an der Stirnfläche 56 des Magnetkerns 15 ein in axialer Richtung vorstehender Absatz, der als Anschlagsfläche 55 für die zweite Dämpfungsfläche 41 dient. Die Ventilschließfeder 49 umgreift in Figur 3 den Magnetkern 15 und wird von diesem zumindest teilweise durchragt. Die Stützschulter 50 ist ebenfalls am Außenumfang des Magnetkerns 15 angeordnet. Durch die Anordnung der Ventilschließfeder 49 außerhalb des Magnetkerns 15 und der damit verbundenen Vergrößerung ihres Durchmessers läßt sich die Führungsstabilität des Ventilschließgliedes 37 im Ventilstützkörper 27 gegenüber der innenliegenden Anordnung nach den Figuren 1 und 2 erhöhen.Opposite the second damping surface 41 is located on the end face 56 of the magnetic core 15 an axially projecting paragraph, which as Stop surface 55 for the second damping surface 41 serves. The valve closing spring 49 encompasses the in FIG Magnetic core 15 and is at least partially by this projects through. The support shoulder 50 is also on the outer circumference of the magnetic core 15 arranged. Through the Arrangement of the valve closing spring 49 outside the Magnetic core 15 and the associated magnification its diameter can be used to guide stability of the valve closing member 37 in the valve support body 27 opposite the internal arrangement according to the figures Increase 1 and 2.

Claims (8)

  1. Valve for the metered introduction of fuel evaporated from the fuel tank of an internal combustion engine into an induction duct of the internal combustion engine, having a valve closing element which is arranged between a valve seat body and a magnet core of an electromagnet, which valve seat body has a passage opening, through which evaporated fuel flows in an opened valve position, and has a first end surface directed towards the valve seat body and a second end surface directed towards the electromagnet and which is acted on by a valve closing spring in the valve closing direction and can be actuated by the electromagnet in the valve opening direction, its first end surface being held pressed against at least one valve seat, with at least one valve opening, configured on the valve seat body when no current is supplied to the electromagnet and taking up a valve open position when increasing current is supplied to the electromagnet, and at least one damper element (35) being provided on the valve closing element (37), which damper element (35) protrudes in the axial direction through the valve closing element (37) and forms a first damping surface (40) directed towards the valve seat body (27) on the first end surface (38) of the valve closing element (37) and forms a second damping surface (41) which is provided directly on that section of the damper element (35) which protrudes in the axial direction through the valve closing element (37), and is directed towards the electromagnet (13) on the second end surface (39) of the valve closing element (37), its first damping surface (40) being in contact with the at least one valve seat (32) when no current is supplied to the electromagnet (13) and its second damping surface (41) being in contact with a stop surface (55) when sufficient current is supplied to the electromagnet (13), the damping effect of the damper element (35) being obtained by internal friction when the damper element (35) is deformed because of an impact.
  2. Valve according to Claim 1, characterized in that the first damping surface (41) of the damper element (35) extends over a partial region (36) of the first end surface (38) of the valve closing element (37), which partial region is at least as large as the valve seat (32) configured on the valve seat body (27) so that the damper element (35) is pressed against the valve seat body (27) by the valve closing spring (49) and the valve closing element (37) when no current is supplied to the electromagnet (13) and closes the at least one valve opening (34) configured in the valve seat body (27).
  3. Valve according to Claim 2, characterized in that the valve closing spring (49) concentrically encloses the magnet core (15) at least partially and the damper element (35) extends in the axial direction, starting from the first partial region (36), along a boundary wall (52) of the passage opening (51) arranged in the valve closing element (37) approximately as far as the second end surface (39).
  4. Valve according to Claim 2, characterized in that at least three passage holes (33) located at the same distance from one another on a hypothetical circle are configured in the valve closing element (37) and the damper element (35) protrudes axially through each of them starting from the first end surface (38), the damper element (35) protruding in each case on the second end surface (39) of the valve closing element (35) beyond the outer contour of the valve closing element (37) and there forming partial damping surfaces of the second damping surface (41) corresponding to the number of passage holes (33).
  5. Valve according to Claim 3 or 4, characterized in that the stop surface (55) is formed by an end surface (56) of the magnet core (15).
  6. Valve according to Claim 3 or 4, characterized in that the stop surface (55) is formed by a stop body (54) connected to the magnet core (15).
  7. Valve according to Claim 3, characterized in that the stop body (54) is manufactured from nonmagnetic material.
  8. Valve according to Claim 1, characterized in that the damper element (35) consists of rubber-type material which is connected to the valve closing element (37) by vulcanizing.
EP94900748A 1992-12-24 1993-12-03 Valve for the metered supply of vaporised fuel to an inlet pipe of an internal combustion engine Expired - Lifetime EP0628137B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4244113A DE4244113A1 (en) 1992-12-24 1992-12-24 Valve for the metered introduction of volatilized fuel into an intake duct of an internal combustion engine
DE4244113 1992-12-24
PCT/DE1993/001151 WO1994015091A1 (en) 1992-12-24 1993-12-03 Valve for the metered supply of vaporised fuel to an inlet pipe of an internal combustion engine

Publications (3)

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EP0628137A1 EP0628137A1 (en) 1994-12-14
EP0628137B1 EP0628137B1 (en) 1997-03-19
EP0628137B2 true EP0628137B2 (en) 2002-08-28

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EP94900748A Expired - Lifetime EP0628137B2 (en) 1992-12-24 1993-12-03 Valve for the metered supply of vaporised fuel to an inlet pipe of an internal combustion engine

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US (1) US5560585A (en)
EP (1) EP0628137B2 (en)
JP (1) JP3597192B2 (en)
KR (1) KR100301333B1 (en)
DE (2) DE4244113A1 (en)
ES (1) ES2100033T5 (en)
WO (1) WO1994015091A1 (en)

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DE59305883D1 (en) 1997-04-24
JP3597192B2 (en) 2004-12-02
JPH07504259A (en) 1995-05-11
EP0628137B1 (en) 1997-03-19
ES2100033T3 (en) 1997-06-01
WO1994015091A1 (en) 1994-07-07
DE4244113A1 (en) 1994-06-30
KR100301333B1 (en) 2001-12-15
KR950700488A (en) 1995-01-16
ES2100033T5 (en) 2003-03-16
EP0628137A1 (en) 1994-12-14
US5560585A (en) 1996-10-01

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