EP0628137B1 - 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 PDFInfo
- Publication number
- EP0628137B1 EP0628137B1 EP94900748A EP94900748A EP0628137B1 EP 0628137 B1 EP0628137 B1 EP 0628137B1 EP 94900748 A EP94900748 A EP 94900748A EP 94900748 A EP94900748 A EP 94900748A EP 0628137 B1 EP0628137 B1 EP 0628137B1
- Authority
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 11
- 238000013016 damping Methods 0.000 claims abstract description 19
- 239000002828 fuel tank Substances 0.000 claims abstract description 5
- 239000000696 magnetic material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000013022 venting Methods 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Images
Classifications
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- 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
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- 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 the metered introduction of fuel volatilized from the fuel tank of an internal combustion engine into an intake duct of the internal combustion engine according to the preamble of the main claim.
- a valve for the metered introduction of fuel volatilized from the fuel tank of an internal combustion engine into an intake duct of the internal combustion engine according to the preamble of the main claim.
- Such a valve is already known (DE 40 23 044 A1), in which disturbing operating noises can occur, in particular when a solenoid which influences the valve position is actuated in a clocked manner, as a result of touching metallic parts moving relative to one another.
- US-A-4 901 974 shows a valve for introducing volatilized fuel into internal combustion engines, in which the valve-closure member made of plastic is locked in a circumferential groove on a rod-shaped armature and bears with a collar in the open position on a coil former.
- a plastic stop body aligned with the core is arranged on the anchor.
- the valve according to the invention with the characterizing features of the main claim has the advantage that an annoying noise during operation of the valve is avoided.
- valve according to the invention has improved wear resistance, since metallic parts moving relative to one another are prevented or weakened.
- FIG. 1 shows a longitudinal section of a first embodiment of a valve according to the invention
- FIG. 2 shows a partial section of the first embodiment according to the dash-dotted line in FIG. 1
- FIG. 3 shows a partial section of a second embodiment of a valve according to the invention.
- the valve shown in FIG. 1 for the metered admixing of fuel volatilized from the fuel tank of a mixture-compressing, spark-ignited internal combustion engine to a fuel / air mixture fed to the internal combustion engine via an intake duct, hereinafter referred to as a tank ventilation valve, is used in a dispensing system for introducing volatilized fuel into a Internal combustion engine used, as described in DE 35 19 292 Al (US 4,763,635).
- the tank ventilation valve has a two-part valve housing 10 with a cup-shaped housing part 101 and a cap-shaped housing part 102 that terminates this.
- the housing part 101 carries an inflow connection 11 for connection to a ventilation connection of the fuel tank or to a downstream, filled with activated carbon storage for the volatilized fuel, while the housing part 102 carries an outflow connection 12 for connection to the intake pipe of the internal combustion engine.
- Inflow connection 11 and outflow connection 12 are each arranged axially in the housing parts 101 and 102, respectively.
- An electromagnet 13 is arranged in the interior of the pot-shaped housing part 101.
- the electromagnet 13 has a pot-shaped magnet housing 14 with a coaxial, hollow-cylindrical magnet core 15 penetrating the bottom of the pot, and a cylindrical excitation coil 16 which is seated on a coil carrier 17 which encloses the magnet core 15 in the magnet housing 14.
- a cylindrical excitation coil 16 which is seated on a coil carrier 17 which encloses the magnet core 15 in the magnet housing 14.
- an outwardly projecting threaded connector 18 with an internal thread 19 is integrally formed, which is screwed to an external thread section 20 of the hollow cylindrical magnetic core 15.
- the magnetic core 15 can therefore be axially displaced by rotating the magnet housing 14.
- the magnetic core 15 is aligned with the inflow nozzle 11, so that the volatilized fuel flowing in here passes directly into the magnetic core 15 and flows through it.
- the magnet housing 14 and the magnet core 15 screwed to it is inserted in the cup-shaped housing part 101 in such a way that 10 axial channels remain between the outer jacket of the magnet housing 14 and the inner jacket of the valve housing, which channels are offset in the circumferential direction from one another by the same angle. 1 shows, for example, two diametrically opposed axial channels 21, 22.
- the axial channels 21, 22 are on the one hand above an annular space 23, which remains between the valve housing 10 and the external thread section 20 of the magnetic core 15, with the inflow nozzle 11 and, on the other hand, through bores 24 which are made in the magnet housing 14 near the open end of the magnet housing 14, with the inside of the magnet housing 14 in connection.
- volatilized fuel emerging from the inflow nozzle 11 also flows around the magnet housing 14 and dissipates any heat generated here.
- the edge of the magnet housing 14 is angled outwards to form an annular support flange 25, which is bent at the end to form an axially projecting ring web 26.
- 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 on retaining pins 29 formed in the cap-shaped housing part 102, which protrude axially on the underside thereof facing the housing part 101.
- the yoke 27 is inserted with an exact fit into the support flange 25 with the ring web 26 and clamped therein.
- valve openings 34 are provided, which can be closed by means of a valve closing member 37 arranged between the yoke 27 and the magnetic core 15.
- An axial through opening 51 with a boundary wall 52 (FIGS. 2 and 3) is located centrally in the valve closing member 37 coaxially with the hollow cylindrical magnetic core 15, through which volatilized fuel coming from the inflow nozzle 11 can reach the outflow nozzle 12 when the valve opening 34 is open.
- the valve closing member 37 is made of magnetically conductive material and at the same time forms the armature of the electromagnet 13.
- the valve closing member 37 is acted upon by a valve closing spring 49 in the valve closing direction.
- valve closing spring 49 is supported on the one hand on the valve closing member 37 and on the other hand on an annular support shoulder 50 formed on the inner wall of the hollow cylindrical magnetic core 15. By energizing the electromagnet 13, the valve closing member 37 can be actuated against the force of the valve closing spring 49 away from the valve opening 34 in the valve opening direction.
- the back of the return yoke 27 facing away from the valve closing member 37 is sealed off from the housing part 102 by a sealing ring 42, so that leakage losses via the connection of the return yoke 27 and the magnet housing 14 are avoided.
- the outflow connector 12 is snapped into a receiving connector 43 which is coaxially formed on the housing part 102.
- a valve seat 44 of a check valve 45 can be formed in the receiving socket 43 on a radially inwardly projecting annular shoulder, on which a valve body 46 is pressed by a valve spring 47.
- the valve spring 47 is supported in an abutment 48 provided in the outflow connection 12.
- the check valve 45 is particularly necessary when the tank ventilation valve is to be used in so-called supercharged engines.
- FIG. 2 shows a partial section of the first exemplary embodiment of a tank ventilation valve according to the invention shown in FIG. 1 according to the dash-dotted line in FIG. 1.
- the hollow cylindrical magnetic core 15 of the electromagnet 13 is surrounded by the excitation coil 16 located on the coil carrier 17.
- the valve closing spring 49 which acts on the valve closing member 37, is supported on the support shoulder 50.
- the yoke 27 has a cylindrical recess 30 on its side facing the magnetic core 15 in the axial direction.
- the plate or disc-shaped valve closing member 37 protrudes into the recess 30 and has a slightly smaller diameter than the recess 30, so that a radial gap 31 remains between the circumference of the valve closing member 37 and the wall of the recess 30.
- the radial gap 31 is dimensioned such that the valve closing member 37 is guided axially displaceably with its circumference in the recess 30.
- two raised valve seats 32 are formed in the area of, for example, two valve openings 34, which form a valve double seat.
- the yoke 27 therefore has the function of a valve seat body of the tank ventilation valve.
- At least three axial through bores 33 are arranged in the valve closing member 37 and lie on an imaginary circle at the same distance from one another.
- the through bores 33 are penetrated by a damper element 35.
- the damper element 35 On a first end face 38 of the valve closing member 37 directed toward the double valve seat 32, the damper element 35 extends in the radial direction and in the circumferential direction over at least one partial area 36 which is at least the same size as the at least one valve seat 32 formed on the valve seat body 27.
- the damper element 35 also seals its portion extending over the first end face 38 of the valve closing member 37 in the valve closing position from the valve openings 34 and dampens an impact of the valve closing member 37 resulting from the valve opening position out of the valve opening position on the valve seat 32 due to the force of the valve closing spring 49.
- the damper element 35 accordingly also forms a first damping surface 40 on the first end face of the valve closing member 37.
- the damper element 35 protrudes in the area of the through bores 33 in a bump-like manner beyond the outer contour of the valve closing member 37.
- the damper element 35 thus forms partial damping surfaces on the second end face 39 in the region of the through bores 33, which together result in a second damping surface 41.
- the damper element 35 bears with its second damping surface 41 against a stop surface 55 formed by a stop body 54. In this way, a metallic impact of the valve closing member 37 can be prevented or dampened with its second end face 39 on an opposite end face 56 of the magnetic core 15.
- the stop body 54 is, for example, ring-shaped and pressed onto the end of the magnetic core 15.
- the stop surface 55 can be axially adjusted together with the end face 56 by means of the adjusting thread formed by the internal thread 19 and the external thread section 20 (FIG. 1). A more or less large axial gap can therefore form between the stop body 54 and the coil body 17.
- the damper element 35 is formed from rubber-like material, which can be connected to the valve closing member 37 by vulcanization.
- the damping effect of the damper element 35 is based in particular on the formation of internal friction in the event of a deformation of the damper element 35 due to an impact.
- the stop ring 54 from non-magnetic material, an unfavorable influencing of the magnetic field geometry of the tank ventilation valve can be avoided. Otherwise, the stop surface 55 can also be formed by the magnetic core 15 itself.
- FIG. 3 shows a partial section of a second embodiment of a tank ventilation valve according to the invention.
- the same and equivalent parts are identified by the same reference numerals as in Figures 1 and 2.
- An essential difference from the first exemplary embodiment is 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 as large as the at least one valve seat 32 formed on the valve seat body 37. From the first partial area 36 starting the damper element 35 extends radially inward to the through opening 51 and from there axially lining the through opening 51 along the boundary wall 52 to the second end face 39 of the valve closing member 37. There it closes approximately axially flush with the second end face 39 and forms there second damping surface 41.
- the damping element 35 can also be formed, for example, in the form of a hump on its second damping surface 41 and / or protrude beyond the outer contour of the valve closing member 37.
- the valve closing spring 49 encompasses the magnetic core 15 in FIG. 3 and is at least partially penetrated by it.
- the support shoulder 50 is also arranged on the outer circumference of the magnetic core 15. The arrangement of the valve closing spring 49 outside the magnetic core 15 and the associated increase in its diameter make it possible to increase the guide stability of the valve closing member 37 in the valve support body 27 compared to the internal arrangement according to FIGS. 1 and 2.
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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
Description
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 Gattung des Hauptanspruchs. Es ist schon ein derartiges Ventil bekannt (DE 40 23 044 Al), 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 the metered introduction of fuel volatilized from the fuel tank of an internal combustion engine into an intake duct of the internal combustion engine according to the preamble of the main claim. Such a valve is already known (
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 is 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 introducing volatilized fuel into internal combustion engines, in which the valve-closure member made of plastic is locked in a circumferential groove on a rod-shaped armature and bears with a collar in the open position on a coil former. In addition, a plastic stop body aligned with the core is arranged on the anchor.
Das erfindungsgemäße Ventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß eine störende Geräuschbildung beim Betrieb des Ventils vermieden wird.The valve according to the invention with the characterizing features of the main claim has the advantage that an annoying noise during operation of the valve is avoided.
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 has improved wear resistance, since metallic parts moving relative to one another are prevented or weakened.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Ventils möglich.Advantageous further developments and improvements of the valve specified in the main claim are possible through the measures listed in the subclaims.
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 shown in simplified form in the drawing and explained in more detail in the following description. 1 shows a longitudinal section of a first embodiment of a valve according to the invention, FIG. 2 shows a partial section of the first embodiment according to the dash-dotted line in FIG. 1, and FIG. 3 shows a partial section of a second embodiment of a valve according to the invention.
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 genannt, 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 Innern des topfförmigen Gehäuseteils 101 ist ein Elektromagnet 13 angeordnet.The valve shown in FIG. 1 for the metered admixing of fuel volatilized from the fuel tank of a mixture-compressing, spark-ignited internal combustion engine to a fuel / air mixture fed to the internal combustion engine via an intake duct, hereinafter referred to as a tank ventilation valve, is used in a dispensing system for introducing volatilized fuel into a Internal combustion engine used, as described in
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
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
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
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
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
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 back of the
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.FIG. 2 shows a partial section of the first exemplary embodiment of a tank ventilation valve according to the invention shown in FIG. 1 according to the dash-dotted line in FIG. 1. The hollow cylindrical
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.At least three axial through bores 33 are arranged in the
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
Der Anschlagkörper 54 ist beispielsweise ringförmig ausgebildet und endseitig am Magnetkern 15 aufgepreßt.The
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
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
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.Figure 3 shows a partial section of a second embodiment of a tank ventilation valve according to the invention. The same and equivalent parts are identified by the same reference numerals as in Figures 1 and 2. An essential difference from the first exemplary embodiment is the arrangement of the
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
Claims (8)
- Valve for the metered introduction of evaporated fuel 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, characterized in that at least one damper element (35) is 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) 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- Valve according to Claim 3, characterized in that the stop body (54) is manufactured from non-magnetic material.
- 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.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4244113 | 1992-12-24 | ||
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 |
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)
Publication Number | Publication Date |
---|---|
EP0628137A1 EP0628137A1 (en) | 1994-12-14 |
EP0628137B1 true EP0628137B1 (en) | 1997-03-19 |
EP0628137B2 EP0628137B2 (en) | 2002-08-28 |
Family
ID=6476560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Country Status (7)
Country | Link |
---|---|
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) |
Families Citing this family (32)
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DE19540021A1 (en) * | 1995-10-27 | 1997-04-30 | Bosch Gmbh Robert | Valve for the metered introduction of fuel vapor volatilized from a fuel tank of an internal combustion engine |
DE19611886A1 (en) * | 1996-03-26 | 1997-10-02 | Bosch Gmbh Robert | magnetic valve |
US5758865A (en) * | 1996-08-21 | 1998-06-02 | Kavlico Corporation | Fuel injection valve and engine including the same |
DE19721562A1 (en) * | 1997-05-23 | 1998-11-26 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel |
DE19905721A1 (en) * | 1998-02-24 | 1999-08-26 | Hoerbiger Ventilwerke Gmbh | Electromagnetically actuated gas valve for use as a fuel injection valve in a gas engine |
US6019347A (en) * | 1998-03-13 | 2000-02-01 | Fema Corporation Of Michigan | Pulse width modulated gas flow control valve |
DE19839476A1 (en) * | 1998-08-29 | 2000-03-02 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel |
DE19852980A1 (en) * | 1998-11-17 | 2000-05-18 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel |
DE19901090A1 (en) * | 1999-01-14 | 2000-07-20 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel |
DE19913937A1 (en) * | 1999-03-26 | 2000-10-05 | Alfmeier Praezision Ag | Fuel tank ventilation/air supply system for motor vehicles ha two anti-parallel valves, one a ventilation valve with gravity-operated closure ball |
WO2000075502A1 (en) * | 1999-06-08 | 2000-12-14 | Sagem | Solenoid bleed valve for a device for the disposal of vapours |
DE19928207A1 (en) | 1999-06-19 | 2000-12-21 | Bosch Gmbh Robert | Magnetic valve for venting automobile fuel tank has magnetic core provided with second screw thread for forming screw thread in coil former as it is screwed into magnet housing |
DE19935261A1 (en) * | 1999-07-27 | 2001-02-01 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel into an intake duct of an internal combustion engine |
DE19937722A1 (en) | 1999-08-10 | 2001-02-15 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel into an intake duct of an internal combustion engine |
DE19958913A1 (en) * | 1999-12-07 | 2001-06-28 | Bosch Gmbh Robert | Electromagnetically actuated valve |
US6722626B2 (en) * | 2000-08-14 | 2004-04-20 | Siemens Automotive Inc. | Valve providing increase in flow for increase in power level |
ES2167275B1 (en) * | 2000-10-20 | 2003-10-16 | Bitron Ind Espana Sa | AIR FLOW REGULATORY ELECTROVALVULA. |
US6467495B2 (en) * | 2000-11-29 | 2002-10-22 | Delphi Technologies, Inc. | Apparatus and method for sealing a solenoid valve |
US6463951B2 (en) * | 2000-11-29 | 2002-10-15 | Delphi Technologies, Inc. | Apparatus and method for sealing a solenoid valve |
US6595485B2 (en) * | 2001-08-08 | 2003-07-22 | Delphi Technologies, Inc. | Solenoid valve with cushion between plunger and plunger stop |
JP2005155712A (en) * | 2003-11-21 | 2005-06-16 | Mitsubishi Electric Corp | Solenoid valve |
US20050210930A1 (en) * | 2004-03-26 | 2005-09-29 | Contini Vincent J | Solenoid plunger cushioning system for a washing machine balancing fluid valve |
CN101166898B (en) * | 2005-04-19 | 2010-05-12 | 欧韦尔公开有限公司 | Gas fuel jet machine for internal-combustion engine |
US20080000456A1 (en) * | 2006-06-30 | 2008-01-03 | Siemens Canada Limited | Cost-optimized canister purge valve |
JP2008075827A (en) * | 2006-09-25 | 2008-04-03 | Denso Corp | Fluid control valve |
EP2500610B1 (en) * | 2011-03-12 | 2016-11-30 | Asco Numatics GmbH | Device for regulating the flow of a fluid or gaseous medium |
DE102011079629A1 (en) * | 2011-07-22 | 2013-01-24 | Robert Bosch Gmbh | Electromagnetically actuated valve |
DE102013201237A1 (en) † | 2013-01-25 | 2014-07-31 | Veritas Ag | vent valve |
US9360120B2 (en) * | 2013-11-01 | 2016-06-07 | Emerson Process Management Regulator Technologies, Inc. | Valve plug for pressure regulator |
FR3035167B1 (en) * | 2015-04-20 | 2018-05-25 | Valeo Systemes De Controle Moteur | PURGE SOLENOID VALVE FOR VAPOR EXHAUST DEVICE |
FR3036456B1 (en) * | 2015-05-20 | 2017-12-22 | Valeo Systemes De Controle Moteur | PURGE SOLENOID VALVE FOR VAPOR EXHAUST DEVICE |
FR3082268B1 (en) * | 2018-06-06 | 2020-07-17 | Valeo Systemes De Controle Moteur | ELECTROMAGNETIC DEVICE COMPRISING A VALVE WITH A SHUTTERING MEMBER FOR LIMITING VIBRATION |
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JP2665842B2 (en) * | 1991-08-02 | 1997-10-22 | 三菱電機株式会社 | solenoid valve |
US5237980A (en) * | 1992-12-02 | 1993-08-24 | Siemens Automotive Limited | On-board fuel vapor recovery system having improved canister purging |
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1992
- 1992-12-24 DE DE4244113A patent/DE4244113A1/en not_active Ceased
-
1993
- 1993-12-03 DE DE59305883T patent/DE59305883D1/en not_active Expired - Lifetime
- 1993-12-03 WO PCT/DE1993/001151 patent/WO1994015091A1/en active IP Right Grant
- 1993-12-03 KR KR1019940702830A patent/KR100301333B1/en not_active IP Right Cessation
- 1993-12-03 US US08/290,710 patent/US5560585A/en not_active Expired - Lifetime
- 1993-12-03 JP JP51466294A patent/JP3597192B2/en not_active Expired - Lifetime
- 1993-12-03 ES ES94900748T patent/ES2100033T5/en not_active Expired - Lifetime
- 1993-12-03 EP EP94900748A patent/EP0628137B2/en not_active Expired - Lifetime
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JPH02209683A (en) * | 1989-02-08 | 1990-08-21 | Mitsubishi Electric Corp | Solenoid valve |
DE4023044A1 (en) * | 1990-07-20 | 1992-01-23 | Bosch Gmbh Robert | VALVE FOR THE DOSED ADMINISTRATION OF VOLATILIZED FUEL TO THE FUEL-AIR MIXTURE OF AN INTERNAL COMBUSTION ENGINE |
US5178116A (en) * | 1990-07-20 | 1993-01-12 | Robert Bosch Gmbh | Valve for metered admixing of volatilized fuel to the fuel/air mixture of an internal combustion engine |
EP0585527A1 (en) * | 1992-09-01 | 1994-03-09 | Firma Carl Freudenberg | Device for temporary feeding of evaporated fuel from the free space of a tank in the intake manifold of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
EP0628137B2 (en) | 2002-08-28 |
DE59305883D1 (en) | 1997-04-24 |
JPH07504259A (en) | 1995-05-11 |
JP3597192B2 (en) | 2004-12-02 |
KR100301333B1 (en) | 2001-12-15 |
ES2100033T5 (en) | 2003-03-16 |
DE4244113A1 (en) | 1994-06-30 |
WO1994015091A1 (en) | 1994-07-07 |
ES2100033T3 (en) | 1997-06-01 |
EP0628137A1 (en) | 1994-12-14 |
US5560585A (en) | 1996-10-01 |
KR950700488A (en) | 1995-01-16 |
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