EP1115969B1 - Valve for the dosed introduction of a volatilized combustible fuel into the intake line of an internal combustion engine - Google Patents
Valve for the dosed introduction of a volatilized combustible fuel into the intake line of an internal combustion engine Download PDFInfo
- Publication number
- EP1115969B1 EP1115969B1 EP00951247A EP00951247A EP1115969B1 EP 1115969 B1 EP1115969 B1 EP 1115969B1 EP 00951247 A EP00951247 A EP 00951247A EP 00951247 A EP00951247 A EP 00951247A EP 1115969 B1 EP1115969 B1 EP 1115969B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- closing member
- damping element
- seat body
- internal combustion
- 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
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/166—Selection of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/12—Other methods of operation
- F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
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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
- F02M2025/0845—Electromagnetic valves
Definitions
- the invention relates to a valve for metered introduction from the fuel tank of an internal combustion engine volatilized fuel into an intake duct which Internal combustion engine according to the preamble of claim 1.
- Such a valve is, for example, from DE 42 44 113 A1 known.
- This valve is a nuisance Noise formation during operation of the valve by at least a damper element significantly reduced.
- this valve also exhibits improved wear resistance on because a collision relative Preventing moving metallic parts or at least is weakened.
- the invention is therefore based on the object Generic valve for the metered introduction of from the volatilized fuel tank of an internal combustion engine Fuel in an intake duct of the internal combustion engine so that further minimization the operating noise even with an increased Air flow through the valve is possible.
- This task is carried out with a valve for metered introduction from the fuel tank of an internal combustion engine volatilized fuel into an intake duct the internal combustion engine of the type described above solved by the features of the main claim.
- the at least one valve opening in the valve closing member at least one other opening is opposite, those of essentially the same shape as that Valve opening and larger than this and formed by the damping element on the valve seat body facing them Side is covered, the damping element arranged on it in the area of the valve opening Sealing surface on an elastic contact surface, which the impact of the valve closing member on the sealing surface the valve opening in the valve seat body resilient dampens. This is a particularly effective one Operation noise can be minimized.
- the damping element projects through the at least one further one Opening advantageously and forms at the Electromagnet facing second end face bump-shaped sealing surface that the boundary line of the at least one arranged in it further opening follows at least partially.
- This arrangement not only enables one particularly easy to attach the damping element to the Valve closure member.
- This arrangement in particular also allows the damping element to arranged on both ends of the valve closing member is and so a metallic contact of the valve closing member with the valve seat body or with a arranged on the electromagnet sealing surface at Impact on this is avoided.
- the damping element preferably consists of a elastomeric material.
- it can be made of rubber exist, which facing the valve seat body Front side of the valve closing member and in the at least another opening is vulcanized and in addition to the damping function, it also fulfills a sealing function.
- a valve for the metered admixture of from the fuel tank a mixture-compressing, spark-ignited Internal combustion engine volatilized fuel to one the internal combustion engine via an intake duct or at direct petrol injection directly into a cylinder the fuel supplied to the internal combustion engine in Fig. 1 and in the following tank vent valve called, is part of a not shown Fuel evaporation retention system of an internal combustion engine.
- Fuel evaporation retention systems the "Bosch Technical Instruction Motor Management Motronic ", 2nd edition, August 1993, pages 48 and 49 removable.
- a tank vent valve and its Function is for example from DE 42 44 113 A1 and from DE 196 11 886 A1, to which reference is made here is taken out.
- the tank ventilation valve has a two-part valve housing 10 with a cup-shaped housing part 101 and a cap-shaped housing part that closes this 102 on.
- the cup-shaped housing part 101 carries an inlet connection 11 for connection to a ventilation connection the fuel tank or to one of these downstream, filled with activated carbon storage for the volatilized fuel.
- the housing part 102 carries an outflow connector 12 for connection to the Intake pipe of the internal combustion engine and an electrical one Contact element, for example a socket 80 for Connection of an electrical line for an electromagnet 13.
- the inlet nozzle 11 and the outlet nozzle 12 are essentially in alignment with each other each arranged axially in the housing parts 101, 102. Inside the pot-shaped housing part 101 the electromagnet 13 is arranged.
- the electromagnet 13 has a pot-shaped magnet housing 14 with a coaxial, penetrating the bottom of the pot, hollow cylindrical magnetic core 15 and a cylindrical Excitation coil 16 on a bobbin 17 sits, which encloses the magnetic core 15 in the magnet housing 14.
- At the bottom of the magnet housing 14 is an after externally projecting threaded connector 18 with an internal thread formed with an external thread section the hollow cylindrical magnetic core 15 screwed is.
- the magnetic core 15 can thus be turned axially displaced in the magnet housing 14 for adjustment purposes become.
- the magnetic core 15 is aligned with the inflow nozzle 11, so that the flowing in here evaporates Fuel flows directly through the magnetic core 15.
- the edge of the magnet housing 14 is outward to one angled support flange 20, at which a the back yoke or annular gap yoke of the electromagnet 13 forming valve seat body rests, which is the magnet housing 14 covers.
- the valve seat body 22 is via damping elements 53, for example made of rubber exist in the housing part 101 and the housing part 102 dampened and is supported by damping elements 52, 53, which surround it at the edge, and the cap-shaped Housing part 102 pressed onto the support flange 20.
- damping elements 53 for example made of rubber exist in the housing part 101 and the housing part 102 dampened and is supported by damping elements 52, 53, which surround it at the edge, and the cap-shaped Housing part 102 pressed onto the support flange 20.
- valve openings 25 for example circular segment shape, arranged by means of one between the valve seat body forming the yoke 22 and the magnetic core 15 arranged Valve closing member 27 are closable. How in particular 2 to 4 emerges is central in the valve closing member 27 coaxial to the hollow cylindrical Magnetic core 15 has an axial through opening 28 provided by the coming from the inflow pipe 11, volatilized fuel with open valve openings 25 of the valve seat body 22 to the outflow nozzle 12 can reach.
- the valve closing member made of magnetically conductive material 27 is from a reset means in Form of a valve closing spring 31 in the valve closing direction acted upon in the direction of the outflow connector 12.
- the valve closing spring 31 is supported on the one hand Valve closing member 27, on the other hand on a sleeve-shaped End of the magnetic core 15.
- valve closing member 27 two further openings 29 arranged, which is essentially the elongated, partially annular Shape of those formed in the valve seat body 22 Have valve openings 25, but larger than these are trained.
- an elastomeric damping element vulcanized, for example in the form of a sealing rubber 60, that extends through the further openings 29 and which on the electromagnet 15 facing second end face of the valve closing member 27 a hump-shaped trained sealing surface 62 which one At least the boundary line of the further openings 29 partly follows.
- the protrusion of the bump-shaped sealing surface 62 via the second end face of the valve closing member 27 is designed so that the magnetic force after impact of the valve closing member 27 on the magnetic core 15 the bump-shaped sealing surface 62 "overpresses" and the valve closing member 27 with metallic contact comes to rest on the magnetic core 15.
- Rubber damping element 60 in the above described embodiment to be very thin-walled can what is necessary when fueling is to excessive swelling in sealing operation to avoid.
Description
Die Erfindung betrifft ein Ventil zum dosierten Einleiten von aus dem Brennstofftank einer Brennkraftmaschine verflüchtigtem Brennstoff in einen Ansaugkanal der, Brennkraftmaschine nach der Gattung des Anspruches 1.The invention relates to a valve for metered introduction from the fuel tank of an internal combustion engine volatilized fuel into an intake duct which Internal combustion engine according to the preamble of claim 1.
Ein derartiges Ventil ist beispielsweise aus der DE 42 44 113 A1 bekannt. Bei diesem Ventil wird eine störende Geräuschbildung beim Betrieb des Ventils durch wenigstens ein Dämpferelement erheblich reduziert. Darüber hinaus weist dieses Ventil eine verbesserte Verschleissresistenz auf, da ein Aufeinanderprallen relativ zueinander bewegter metallischer Teile verhindert oder zumindest abgeschwächt wird.Such a valve is, for example, from DE 42 44 113 A1 known. This valve is a nuisance Noise formation during operation of the valve by at least a damper element significantly reduced. About that this valve also exhibits improved wear resistance on because a collision relative Preventing moving metallic parts or at least is weakened.
Durch dieses Ventil ist bereits eine deutliche Verminderung störender Nebengeräusche möglich.This valve is already a significant reduction annoying background noises possible.
Insbesondere bei benzindirekteinspritzenden Brennkraftmaschinen, welche mit einem größeren Luftdurchsatz arbeiten, wird jedoch von den Kraftfahrzeugherstellern eine weitere Geräuschverminderung beim Betrieb derartiger Ventile gefordert.Particularly in the case of direct-injection internal combustion engines, which work with a larger air flow, is however used by the automobile manufacturers a further noise reduction in the operation of such Valves required.
Der Erfindung liegt daher die Aufgabe zugrunde, ein gattungsgemäßes Ventil zum dosierten Einleiten von aus dem Brennstofftank einer Brennkraftmaschine verflüchtigtem Brennstoff in einen Ansaugkanal der Brennkraftmaschine so weiterzubilden, daß eine weitere Minimierung der Betriebsgeräusche auch bei einem erhöhten Luftdurchsatz durch das Ventil möglich ist.The invention is therefore based on the object Generic valve for the metered introduction of from the volatilized fuel tank of an internal combustion engine Fuel in an intake duct of the internal combustion engine so that further minimization the operating noise even with an increased Air flow through the valve is possible.
Diese Aufgabe wird bei einem Ventil zum dosierten Einleiten von aus dem Brennstofftank einer Brennkraftmaschine verflüchtigtem Brennstoff in einen Ansaugkanal der Brennkraftmaschine der eingangs beschriebenen Art durch die Merkmale des Hauptanspruchs gelöst. Dadurch, dass der wenigstens einen Ventilöffnung im Ventilschließglied wenigstens eine weitere Öffnung gegenüberliegt, die von im wesentlichen gleicher Gestalt wie die Ventilöffnung und größer als diese ausgebildet und von dem Dämpfungselement an ihrer dem Ventilsitzkörper zugewandten Seite überdeckt ist, weist das Dämpfungselement an seiner im Bereich der Ventilöffnung angeordneten Dichtfläche eine elastische Auflagefläche auf, welche den Aufprall des Ventilschließglieds auf die Dichtfläche der Ventilöffnung in dem Ventilsitzkörper federnd abdämpft. Hierdurch ist eine besonders effektive Minimierung der Betriebsgeräusche möglich.This task is carried out with a valve for metered introduction from the fuel tank of an internal combustion engine volatilized fuel into an intake duct the internal combustion engine of the type described above solved by the features of the main claim. Thereby, that the at least one valve opening in the valve closing member at least one other opening is opposite, those of essentially the same shape as that Valve opening and larger than this and formed by the damping element on the valve seat body facing them Side is covered, the damping element arranged on it in the area of the valve opening Sealing surface on an elastic contact surface, which the impact of the valve closing member on the sealing surface the valve opening in the valve seat body resilient dampens. This is a particularly effective one Operation noise can be minimized.
Bei einer vorteilhaften Ausführungsform ist vorgesehen, dass die dem Ventilsitzkörper zugewandte Stirnseite des Ventilschließglieds von dem Dämpfungselement wenigstens teilweise flächig überdeckt ist. Dies ermöglicht eine großflächige und gut haftende Befestigung des Dämpfungselements an dem Ventilschließglied.In an advantageous embodiment, that the end face of the valve seat body facing Valve closure member of the damping element at least is partially covered. This enables one Large and well adhering fastening of the damping element on the valve closing member.
Das Dämpfungselement durchragt die wenigstens eine weitere Öffnung vorteilhafterweise und bildet an der dem Elektromagneten zugewandten zweiten Stirnseite eine höckerförmig ausgebildete Dichtfläche, die der Begrenzungslinie der in ihm angeordneten wenigstens einen weiteren Öffnung wenigstens teilweise folgt. Diese Anordnung ermöglicht nicht nur eine besonders einfach herzustellende Befestigung des Dämpfungselements an dem Ventilschließglied. Durch diese Anordnung wird insbesondere auch ermöglicht, dass das Dämpfungselement an beiden Stirnseiten des Ventilschließglieds angeordnet ist und so eine metallische Berührung des Ventilschließglieds mit dem Ventilsitzkörper oder mit einer an dem Elektromagneten angeordneten Dichtfläche beim Aufprallen auf diese vermieden wird.The damping element projects through the at least one further one Opening advantageously and forms at the Electromagnet facing second end face bump-shaped sealing surface that the boundary line of the at least one arranged in it further opening follows at least partially. This arrangement not only enables one particularly easy to attach the damping element to the Valve closure member. This arrangement in particular also allows the damping element to arranged on both ends of the valve closing member is and so a metallic contact of the valve closing member with the valve seat body or with a arranged on the electromagnet sealing surface at Impact on this is avoided.
Das Dämpfungselement besteht vorzugsweise aus einem elastomeren Material. Es kann beispielsweise aus Gummi bestehen, der auf die an dem Ventilsitzkörper zugewandte Stirnseite des Ventilschließglieds und in der wenigstens einen weiteren Öffnung aufvulkanisiert ist und neben der Dämpfungs- auch eine Dichtungsfunktion erfüllt.The damping element preferably consists of a elastomeric material. For example, it can be made of rubber exist, which facing the valve seat body Front side of the valve closing member and in the at least another opening is vulcanized and in addition to the damping function, it also fulfills a sealing function.
Ausführungsbeispiele der Erfindung sind in der Zeichnung schematisch dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are in the drawing represented schematically and in the following Description explained in more detail.
Es zeigen:
- Fig. 1
- Schnittdarstellungen eines von der Erfindung Gebrauch machenden Ventils in zueinander senkrechten Richtungen;
- Fig. 2
- eine Ansicht eines bei dem in Fig. 1 dargestellten Ventil verwendeten Ventilschließglieds;
- Fig. 3
- eine Unteransicht des in Fig. 2 dargestellten Ventilschließglieds;
- Fig. 4
- eine Schnittdarstellung des in Fig. 2 dargestellten Ventilschließglieds und
- Fig. 5
- eine in Fig. 4 mit V bezeichnete Ausschnittvergrößerung.
- Fig. 1
- Sectional views of a valve making use of the invention in mutually perpendicular directions;
- Fig. 2
- a view of a valve closing member used in the valve shown in Fig. 1;
- Fig. 3
- a bottom view of the valve closing member shown in Fig. 2;
- Fig. 4
- a sectional view of the valve closing member shown in Fig. 2 and
- Fig. 5
- an enlarged section designated V in FIG. 4.
Ein Ventil zum dosierten Zumischen von aus dem Brennstofftank einer gemischverdichtenden, fremdgezündeten Brennkraftmaschine verflüchtigten Brennstoff zu einem der Brennkraftmaschine über einen Ansaugkanal oder bei einer Benzindirekteinspritzung direkt in einen Zylinder der Brennkraftmaschine zugeführten Brennstoff, dargestellt in Fig. 1 und im folgenden Tankentlüftungsventil genannt, ist Teil eines nicht näher dargestellten Brennstoffverdunstungsrückhaltesystems einer Brennkraftmaschine. Der Aufbau und die Funktion derartiger Brennstoffverdunstungsrückhaltesysteme ist beispielsweise der "Bosch Technische Unterrichtung Motor Management Motronic", 2. Ausgabe, August 1993, Seiten 48 und 49 entnehmbar. Ein Tankentlüftungsventil und dessen Funktion geht beispielsweise aus der DE 42 44 113 A1 sowie aus der DE 196 11 886 A1, auf die vorliegend Bezug genommen wird, hervor.A valve for the metered admixture of from the fuel tank a mixture-compressing, spark-ignited Internal combustion engine volatilized fuel to one the internal combustion engine via an intake duct or at direct petrol injection directly into a cylinder the fuel supplied to the internal combustion engine in Fig. 1 and in the following tank vent valve called, is part of a not shown Fuel evaporation retention system of an internal combustion engine. The structure and function of such For example, fuel evaporation retention systems the "Bosch Technical Instruction Motor Management Motronic ", 2nd edition, August 1993, pages 48 and 49 removable. A tank vent valve and its Function is for example from DE 42 44 113 A1 and from DE 196 11 886 A1, to which reference is made here is taken out.
Das Tankentlüftungsventil weist ein zweiteiliges Ventilgehäuse
10 mit einem topfförmigen Gehäuseteil 101
und einem diesen abschließenden, kappenförmigen Gehäuseteil
102 auf. Der topfförmige 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. Der Gehäuseteil 102
trägt einen Abströmstutzen 12 zum Anschließen an das
Ansaugrohr der Brennkraftmaschine sowie ein elektrisches
Kontaktelement, beispielsweise eine Buchse 80 zum
Anschließen einer elektrischen Leitung für einen Elektromagneten
13. Der Zuströmstutzen 11 und der Abströmstutzen
12 sind miteinander im wesentlichen fluchtend
jeweils axial in den Gehäuseteilen 101, 102 angeordnet.
Im Inneren des topfförmigen Gehäuseteils 101
ist der Elektromagnet 13 angeordnet.The tank ventilation valve has a two-
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 ein nach
außen vorspringender Gewindestutzen 18 mit einem Innengewinde
ausgebildet, das mit einem Aussengewindeabschnitt
des hohlzylindrischen Magnetkerns 15 verschraubt
ist. Der Magnetkern 15 kann damit durch Drehen
im Magnetgehäuse 14 zu Justierzwecken axial verschoben
werden. Der Magnetkern 15 fluchtet mit dem Zuströmstutzen
11, so daß der hier einströmende, verflüchtigte
Brennstoff direkt den Magnetkern 15 durchströmt.The
Der Rand des Magnetgehäuses 14 ist nach aussen zu einem
ringförmigen Auflageflansch 20 abgewinkelt, an dem ein
das Rückschluss- oder Ringspaltjoch des Elektromagneten
13 bildender Ventilsitzkörper 22 aufliegt, der das Magnetgehäuse
14 abdeckt. Der Ventilsitzkörper 22 ist
über Dämpfungselemente 53, die beispielsweise aus Gummi
bestehen, in dem Gehäuseteil 101 und dem Gehäuseteil
102 gedämpft gelagert und wird von Dämpfungselementen
52, 53, die ihn randseitig umschließen, und dem kappenförmigen
Gehäuseteil 102 auf den Auflageflansch 20 gepresst.
Hierdurch wird einerseits die Übertragung von
Körperschall auf das Ventilgehäuse 10 reduziert, andererseits
erfüllen die Dämpfungselemente 52, 53 gleichzeitig
auch eine Dichtfunktion.The edge of the
In dem den Ventilsitzkörper 22 bildenden Rückschlussjoch
sind zwei Ventilöffnungen 25, von beispielsweise
kreissegmentförmiger Gestalt, angeordnet, die mittels
eines zwischen dem das Rückschlussjoch bildenden Ventilsitzkörper
22 und dem Magnetkern 15 angeordneten
Ventilschließgliedes 27 verschließbar sind. Wie insbesondere
aus Fig. 2 bis Fig. 4 hervorgeht, ist zentral
in dem Ventilschließglied 27 koaxial zum hohlzylindrischen
Magnetkern 15 eine axiale Durchgangsöffnung 28
vorgesehen, durch die vom Zuströmstutzen 11 herkommender,
verflüchtigter Brennstoff bei geöffneten Ventilöffnungen
25 des Ventilsitzkörpers 22 zum Abströmstutzen
12 gelangen kann.In the yoke forming the
Das aus magnetisch leitendem Material hergestellte Ventilschließglied
27 ist von einem Rückstellmittel in
Form einer Ventilschließfeder 31 in Ventilschließrichtung
in Richtung des Abströmstutzens 12 beaufschlagt.
Die Ventilschließfeder 31 stützt sich einerseits am
Ventilschließglied 27, andererseits an einem hülsenförmigen
Ende des Magnetkerns 15 ab.The valve closing member made of magnetically
Wie insbesondere aus Fig. 2 bis Fig. 5 hervorgeht, sind
in dem Ventilschließglied 27 zwei weitere Öffnungen 29
angeordnet, die im wesentlichen die längliche, teilringförmige
Form der in dem Ventilsitzkörper 22 ausgebildeten
Ventilöffnungen 25 aufweisen, aber größer als
diese ausgebildet sind. Im Bereich dieser weiteren Öffnungen
29 und auf seiner dem Ventilsitzkörper 22 zugewandten
Stirnseite ist ein elastomeres Dämpfungselement,
beispielsweise in Form eines Dichtgummis 60 aufvulkanisiert,
das die weiteren Öffnungen 29 durchragt
und welches an der dem Elektromagneten 15 zugewandten
zweiten Stirnseite des Ventilschließglieds 27 eine hökkerförmig
ausgebildete Dichtfläche 62 aufweist, die einer
Begrenzungslinie der weiteren Öffnungen 29 wenigstens
teilweise folgt. Durch die weiteren Öffnungen 29,
die geringfügig größer ausgebildet sind als die Ventilöffnungen
25 in dem Ventilsitzglied 22, und die von dem
Dämpfungselement 60 überdeckt sind, wird der Aufprall
des als Anker wirkenden Ventilschließglieds 27 auf die
Dichtfläche der Ventilöffnung 25 in dem Ventilsitzglied
27 aufgrund der so elastisch federnd ausgebildeten Auflageflächen
des Dämpfungselements 60 gedämpft. Hierdurch
entsteht eine wesentliche Geräuschminimierung.
Beim Öffnen des Ventils wird der Aufprall des Ventilschließglieds
27 auf den Magnetkern 15 durch die in dem
Bereich der weiteren Öffnung 29 angeordneten und hökkerförmig
überstehenden Dichtfläche 62 ebenfalls gedämpft.
Der Überstand der höckerförmigen Dichtfläche 62
über die zweite Stirnfläche des Ventilschließglieds 27
ist so ausgelegt, dass die Magnetkraft nach dem Aufprallen
des Ventilschließglieds 27 auf dem Magnetkern
15 die höckerförmige Dichtfläche 62 "überdrückt" und
das Ventilschließglied 27 unter metallischer Berührung
an dem Magnetkern 15 zur Anlage kommt. Dadurch ergibt
sich der Vorteil, dass der Öffnungs- und Schließhub des
Ventilschließglieds 27 und damit auch die zwischen dem
Ventilschließglied 27 und den Ventilöffnungen 25 gebildeten
Strömungsquerschnitte konstant bleiben. Da das
Ventilschließglied 27 auf seinen beiden Stirnseiten mit
dem Dämpfungselement versehen ist, wird beim Aufprallen
eine metallische Berührung zwischen Magnetkern 15 und
dem als Ventilsitzkörper 22 dienenden Ringspaltjoch im
Taktbetrieb vermieden.As can be seen in particular from FIGS. 2 to 5,
in the
Besonders vorteilhaft ist es, dass das beispielsweise
aus Gummi ausgeführte Dämpfungselement 60 bei dem oben
beschriebenen Ausführungsbeispiel sehr dünnwandig sein
kann, was bei einer Beaufschlagung mit Kraftstoff notwendig
ist, um ein zu starkes Aufquellen im Dichtbetrieb
zu vermeiden.It is particularly advantageous that, for example
Claims (5)
- Valve for the metered introduction of fuel volatilized out of the fuel tank of an internal combustion engine into an intake duct of the internal combustion engine, with a valve-closing member (27) which is arranged between a valve-seat body (22) and a magnet core (15) of an electromagnet (13) and which has at least one passage orifice (28) and is acted upon in a valve-closing direction by a restoring means (31) and can be actuated in a valve-opening direction by the electromagnet (13), and with a damping element (60) which is arranged on the valve-closing member (27) and which projects through the valve-closing member (27) in the axial direction, characterized in that at least one valve orifice (25) arranged in the valve-seat body (22) has located opposite it a further orifice (29) which is arranged in the valve-closing member (27) and which is designed with essentially the same shape as the at least one valve orifice (25) and so as to be larger than the latter and is covered by the damping element (60) on its end face facing the valve-seat body (22).
- Valve according to Claim 1, characterized in that that end face of the valve-closing member (27) which faces the valve-seat body (22) is covered at least partially over its area by the damping element (60).
- Valve according to Claim 1 or 2, characterized in that the damping element (60) projects through the at least one further orifice (29) and, on that end face of the valve-closing member (27) which faces the electromagnet (13), has a hump-shaped sealing surface which at least partially follows the boundary line of the at least one further orifice (29).
- Valve according to one of Claims 1 to 3, characterized in that the damping element (60) consists of an elastomeric material.
- Valve according to Claim 4, characterized in that the damping element is a sealing rubber which is vulcanized onto that face of the valve-closing member (27) which faces the valve-seat body (22) and onto the boundary wall of the at least one further orifice (29).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19935261A DE19935261A1 (en) | 1999-07-27 | 1999-07-27 | Valve for the metered introduction of volatilized fuel into an intake duct of an internal combustion engine |
| DE19935261 | 1999-07-27 | ||
| PCT/DE2000/002057 WO2001007775A1 (en) | 1999-07-27 | 2000-06-24 | Valve for the dosed introduction of a volatilized combustible fuel into the intake line of an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1115969A1 EP1115969A1 (en) | 2001-07-18 |
| EP1115969B1 true EP1115969B1 (en) | 2004-05-19 |
Family
ID=7916226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00951247A Expired - Lifetime EP1115969B1 (en) | 1999-07-27 | 2000-06-24 | Valve for the dosed introduction of a volatilized combustible fuel into the intake line of an internal combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6530558B1 (en) |
| EP (1) | EP1115969B1 (en) |
| JP (1) | JP2003505643A (en) |
| DE (2) | DE19935261A1 (en) |
| WO (1) | WO2001007775A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10148874C2 (en) * | 2001-10-04 | 2003-12-24 | Siemens Ag | Nozzle device, in particular for fuel injection |
| GB0216115D0 (en) * | 2002-07-11 | 2002-08-21 | Parker Hannifin U K Ltd | Self-venting solenoid drain valves |
| DE102004033280A1 (en) * | 2004-07-09 | 2006-02-02 | Robert Bosch Gmbh | Injector for fuel injection |
| 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 |
| US8261741B2 (en) * | 2007-11-05 | 2012-09-11 | Resmed Limited | Method and apparatus for backspill prevention |
| JP6427071B2 (en) * | 2015-06-10 | 2018-11-21 | 愛三工業株式会社 | Fuel supply system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US5374029A (en) * | 1992-06-26 | 1994-12-20 | Wright Components, Inc. | Solenoid flow control valve and frictionless plunger assembly |
| DE4244113A1 (en) * | 1992-12-24 | 1994-06-30 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel into an intake duct of an internal combustion engine |
| US5467961A (en) * | 1993-05-06 | 1995-11-21 | Firma Carl Freudenberg | Electromagnetically actuated valve |
| DE4322564A1 (en) * | 1993-07-07 | 1995-01-12 | Pierburg Gmbh | Electromagnetic switch valve |
| DE19721562A1 (en) * | 1997-05-23 | 1998-11-26 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel |
| DE19740580C2 (en) * | 1997-09-16 | 2001-06-13 | Pierburg Ag | Electromagnetic switching valve |
| DE19839476A1 (en) * | 1998-08-29 | 2000-03-02 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel |
| JP2000087826A (en) * | 1998-09-14 | 2000-03-28 | Toyota Motor Corp | Fuel injection valve and its manufacture |
-
1999
- 1999-07-27 DE DE19935261A patent/DE19935261A1/en not_active Withdrawn
-
2000
- 2000-06-24 EP EP00951247A patent/EP1115969B1/en not_active Expired - Lifetime
- 2000-06-24 US US09/806,058 patent/US6530558B1/en not_active Expired - Fee Related
- 2000-06-24 JP JP2001512178A patent/JP2003505643A/en active Pending
- 2000-06-24 WO PCT/DE2000/002057 patent/WO2001007775A1/en active IP Right Grant
- 2000-06-24 DE DE50006479T patent/DE50006479D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003505643A (en) | 2003-02-12 |
| EP1115969A1 (en) | 2001-07-18 |
| WO2001007775A1 (en) | 2001-02-01 |
| DE50006479D1 (en) | 2004-06-24 |
| US6530558B1 (en) | 2003-03-11 |
| DE19935261A9 (en) | 2005-11-03 |
| DE19935261A1 (en) | 2001-02-01 |
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