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EP1630405A2 - Fuel supply system - Google Patents

Fuel supply system Download PDF

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Publication number
EP1630405A2
EP1630405A2 EP20050106801 EP05106801A EP1630405A2 EP 1630405 A2 EP1630405 A2 EP 1630405A2 EP 20050106801 EP20050106801 EP 20050106801 EP 05106801 A EP05106801 A EP 05106801A EP 1630405 A2 EP1630405 A2 EP 1630405A2
Authority
EP
European Patent Office
Prior art keywords
valve
supply system
fuel supply
fuel
mixer
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.)
Granted
Application number
EP20050106801
Other languages
German (de)
French (fr)
Other versions
EP1630405A3 (en
EP1630405B1 (en
Inventor
Carsten Benzin
Bernd Lienemann
Alexander Sonntag
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens AG
Continental Automotive GmbH
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Continental Automotive GmbH, Siemens Corp filed Critical Siemens AG
Publication of EP1630405A2 publication Critical patent/EP1630405A2/en
Publication of EP1630405A3 publication Critical patent/EP1630405A3/en
Application granted granted Critical
Publication of EP1630405B1 publication Critical patent/EP1630405B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
    • F02M37/0094—Saddle tanks; Tanks having partition walls
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet pump
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4673—Plural tanks or compartments with parallel flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/86131—Plural

Definitions

  • the invention relates to a fuel supply system for supplying an internal combustion engine of a motor vehicle with two arranged in a fuel tank conveying means for conveying fuel, with a connector for guiding the subsidized by the funding fuel of two, each connected to the funding inlets to an outlet.
  • Such fuel supply systems are used, for example, for motor vehicles with a high power consumption and narrow fuel tanks, where a single funding often insufficient in terms of performance, and are known in practice. Furthermore, such fuel supply systems are used in so-called saddle tanks, in which the fuel tank has two chambers, wherein in the individual chambers additionally suction jet pumps can be arranged, which promote fuel in one or two baffles.
  • the connecting pieces combine a flow of two lines, for example the conveyor units, to a fuel line leading to the internal combustion engine or to one or two suction jet pumps.
  • the connectors of the known fuel supply system are ordinary tees.
  • a disadvantage of the known fuel supply system that, for example, in one of two in-service funding fuel from one of the funding can flow to the switched off funding. This leads to an unnecessary circulation of the fuel and to energy losses in promoting the fuel to the internal combustion engine. In order to avoid this problem, one manages in practice with the fact that between the inlets and the conveying means in each case a check valve is used. However, this leads to a very large construction effort of the fuel supply system.
  • the invention is based on the problem, a fuel supply system of the type mentioned in such a way that an unnecessary overflow of the fuel is avoided via the connector and that the fuel supply system is particularly simple.
  • the connecting piece has a mixer valve and that the mixer valve closes the inlet at the low pressure at a pressure difference between the inlets.
  • the fuel supply system according to the invention requires no additional check valves in the lines leading from the conveyor units to the connector. Therefore, the fuel supply system according to the invention consists of particularly few components to be assembled and is thus constructed particularly simple. Of course, can be connected by connecting several mixer valves more than two funding with a single outlet to connect a single fuel line.
  • connection of the funded by the funding fuel flows designed according to an advantageous embodiment of the invention structurally particularly simple if the inlets each have a valve seat and if between the valve seats, a valve body is movably guided by the pressure in the inlets and if the distance of the valve seats larger is the width of the valve body. To avoid periodically occurring pressure fluctuations, the movement of the valve body can of course be damped.
  • the consumer can be supplied with fuel via both conveying means if, in a middle position of the valve body, both inlets are connected to the outlet between the valve seats. In this way it is ensured that, when the internal combustion engine requires a great deal of fuel, both pumping units can jointly convey fuel.
  • An emptying of a leading to the engine flow line can be avoided according to another advantageous embodiment of the invention, when a check valve is disposed between the mixer valve and the outlet.
  • a control valve is arranged, which connects the outlet with an opening into the fuel tank opening in the pressureless state and in the pressurized state the opening closes.
  • the opening and fuel flows from the mixer valve of the connector to the outlet and thus to the ejector.
  • the control valve prevents fuel from being drawn in via the outlet.
  • the assembly of the fuel supply system according to the invention is particularly simple if the mixer valve is formed with the control valve or the check valve as a structural unit. In this way, the mixer valve with the control valve or with the check valve outside the fuel tank can be preassembled to the structural unit and then use with little effort in the fuel tank.
  • the mixer valve and the control valve or the check valve have a common housing.
  • the mixer valve and / or the control valve and / or the check valve have straight channels for receiving the valve body and that the channels are closed by a closure means.
  • the closure means is formed as a form-fitting connected to the housing cap or plug.
  • the mixer valve designed in accordance with another advantageous embodiment of the invention structurally particularly simple when one of the valve seats of the mixer valve in the Closure means and the other of the valve seats is arranged in the housing.
  • a distribution of the funding in a base load conveyor and a peak load conveyor can be one of the inlets in basic position simply close when the valve body of the mixer valve is biased in a designated position.
  • valve body of the mixer valve is designed as a ball.
  • FIG. 1 shows a fuel tank 1 for a motor vehicle with a fuel supply system for supplying an internal combustion engine 2 with fuel.
  • the fuel tank 1 is formed as a saddle tank with two chambers 3, 3 'and has a filler neck 4.
  • the fuel supply system has two conveyor units 5, 5', each with a swirl pot 6, 6 '.
  • the fuel tank 1 mounting flanges 7, 7' on. Through one of the mounting flanges 7 'one of the conveyor units 5, 5' guided to the internal combustion engine 2 feed line 8 is passed. This is a so-called non-return fuel supply system, in which no fuel unused by the internal combustion engine 2 is returned to the fuel tank 1.
  • the conveyor units are 5, 5 'each electrically driven and each have a precursor 9 and a main stage 10.
  • the main stages 10 promote fuel from the surge chambers 6, 6' via a first connector 11 to the engine 2.
  • the precursors 9 promote fuel from the Swirl pots 6, 6 'via a second connector 12 to in the chambers 3, 3' arranged suction jet pumps 13, 13 '.
  • the Saugstrahlpumpen 13, 13 ' are thereby supplied with fuel as a propellant and promote fuel from the chambers 3, 3' in the surge chambers 6, 6 '.
  • Filters 15 of the main stages 10 are arranged in the surge chambers 6, 6 '.
  • the conveyor units 5, 5 ' can be operated individually or jointly according to the needs of the internal combustion engine 2. With little need of the internal combustion engine 2 to fuel thus one of the conveyor units 5, 5 'is turned off.
  • FIG. 2 shows the first connector 11 of the fuel supply system of Figure 1 in a sectional view.
  • the connecting piece 11 has two inlets 16, 16 ', which are each connected to the main stages 10 of the conveyor units 5, 5' of FIG.
  • the connecting piece 11 has an outlet 17, to which the feed line 8 shown in FIG. 1 and leading to the internal combustion engine 2 can be connected.
  • the connecting piece 11 has a check valve 18 and a mixer valve 19.
  • the check valve 18 has a biased by a spring element 20 against a valve seat 21 valve body 22. If none of the conveyor units 5, 5 'shown in Figure 1 promotes fuel, the spring element 20 presses the valve body 22 against the valve seat 21 and closes the outlet 17. Thus an idling of the flow line 8 is prevented.
  • the valve body 22 of the check valve 18 When a delivery of at least one of the conveyor units 5, 5 ', the valve body 22 of the check valve 18 is pushed away from the valve seat 21 and fuel flows to the outlet 17 of the first connector 11 and thus in the flow line 8.
  • the mixer valve 19 has one between two valve seats 23rd When conveying only one of the conveyor units 5, 5 'of Figure 1, the valve body 24 is pressed against one of the valve seats 23, 23' and thus closes the inlet 16, 16 'of the other Feed unit 5, 5 '. This prevents that from the one conveyor unit 5, 5 'funded fuel through the switched-off other conveyor unit 5, 5' is conveyed back into the fuel tank 1.
  • the first connector 11 has a common housing 25 for the mixer valve 19 and the check valve 18.
  • the mixer valve 19 and the check valve 18 are each sealed with a cap 26, 27.
  • FIG 3 shows the second connector 12 of the fuel supply system of Figure 1, with two inlets 28, 28 'for connecting the precursors 9 of the conveyor units 5, 5' of Figure 1 and an outlet 29, to which the two Saugstrahlpumpen 13, 13 'connect to let.
  • the second connector 12 has a mixer valve 30, which is constructed like the mixer valve 19 of the first valve 11 of Figure 2.
  • the second connection piece 12, seen in the flow direction behind the mixer valve 30, has a control valve 31 with a valve body 33 held away from a valve seat 32 by gravity. From the valve body 33, the control valve 31 has a valve seat 32 leading into the fuel tank 1 Opening 34.
  • valve body 33 When a delivery of at least one of the conveyor units 5, 5 'of the fuel supply system of Figure 1, the valve body 33 is pressed against the valve seat 32 and closes the opening 34. Thus, fuel through the outlet 29 to the illustrated in Figure 1 Saugstrahlpumpen 13, 13 'promoted.
  • both conveyor units 5, 5 'are turned off the valve body 33 of the control valve 31 is pushed by gravity from the valve seat 32 in the position shown. As a result, the outlet 29 is connected to the opening into the fuel tank 1 opening 34. This air enters the lines leading to the suction jet pumps 13, 13 '. A siphon effect, which leads to a suction of fuel would lead through the precursors 9 of the conveyor units 5, 5 ', is thus prevented.
  • FIG. 4 shows a further embodiment of the mixer valve 19, 30 of first or second connecting piece 11, 12, which differs from that of FIGS. 2 and 3 only in that a valve body 35 guided between two valve seats 36, 36 'is dish-shaped. Furthermore, the valve body 35 may be biased by a spring element, for example in the middle position in an embodiment not shown. If the conveying units 5, 5 'from FIG. 1 are divided into a base load conveying unit 5, 5' and a peak load conveying unit 5, 5 ', alternatively the valve body 33 can also act against the valve seat leading to the peak load conveying unit 5, 5' 36, 36 'to be biased. Thus, an inlet 37, 37 'leading to the peak load delivery unit 5, 5' is always closed when the internal combustion engine 2 of FIG. 1 does not require an increased demand for fuel.
  • FIG. 5 shows a further embodiment of the mixer valve 19, 30 for the first or second valve 11, 12 of FIG. 1, with two inlets 38, 38 'in which a channel leading to the control valve 31 from FIG. 3 or the check valve 18 from FIG 39 is passed under one of the inlets 38.
  • a valve body 40 is movably guided between two valve seats 41, 41 '.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Check Valves (AREA)

Abstract

The system has conveyors (5, 5`) arranged at a fuel container (1) for conveying fuel, and a connecting piece (11) for guiding of the fuel to an outlet. The piece has a mixing valve that closes an inlet with small force when there is a pressure difference between the inlets. Each inlet has a valve seat, and a valve body is guided between the valve seats. A control valve is arranged between the mixing valve and the outlet.

Description

Die Erfindung betrifft eine Kraftstoffversorgungsanlage zur Versorgung einer Brennkraftmaschine eines Kraftfahrzeuges mit zwei in einem Kraftstoffbehälter angeordneten Fördermitteln zum Fördern von Kraftstoff, mit einem Verbindungsstück zur Führung des von den Fördermitteln geförderten Kraftstoffs von zwei, jeweils mit den Fördermitteln verbundenen Einlässen zu einem Auslass.The invention relates to a fuel supply system for supplying an internal combustion engine of a motor vehicle with two arranged in a fuel tank conveying means for conveying fuel, with a connector for guiding the subsidized by the funding fuel of two, each connected to the funding inlets to an outlet.

Solche Kraftstoffversorgungsanlagen werden beispielsweise für Kraftfahrzeuge mit einer hohen Leistungsaufnahme und engen Kraftstoffbehältern, bei denen ein einzelnes Fördermittel häufig leistungsmäßig nicht ausreicht, eingesetzt und sind aus der Praxis bekannt. Weiterhin werden solche Kraftstoffversorgungsanlagen in sogenannten Satteltanks, bei denen der Kraftstoffbehälter zwei Kammern aufweist, eingesetzt, wobei in den einzelnen Kammern zusätzlich Saugstrahlpumpen angeordnet werden können, welche Kraftstoff in einen oder zwei Schwalltöpfe fördern. Die Verbindungsstücke vereinigen eine Strömung zweier Leitungen beispielsweise der Fördereinheiten zu einer zu der Brennkraftmaschine oder zu einer oder zwei Saugstrahlpumpen führenden Kraftstoffleitung. Die Verbindungsstücke der bekannten Kraftstoffversorgungsanlage sind dabei gewöhnliche T-Stücke.Such fuel supply systems are used, for example, for motor vehicles with a high power consumption and narrow fuel tanks, where a single funding often insufficient in terms of performance, and are known in practice. Furthermore, such fuel supply systems are used in so-called saddle tanks, in which the fuel tank has two chambers, wherein in the individual chambers additionally suction jet pumps can be arranged, which promote fuel in one or two baffles. The connecting pieces combine a flow of two lines, for example the conveyor units, to a fuel line leading to the internal combustion engine or to one or two suction jet pumps. The connectors of the known fuel supply system are ordinary tees.

Nachteilig bei der bekannten Kraftstoffversorgungsanlage ist, dass beispielsweise bei einem von zwei in Betrieb befindlichen Fördermitteln Kraftstoff von einem der Fördermittel zu dem abgeschalteten Fördermittel überströmen kann. Dies führt zu einem unnötigen Umwälzen des Kraftstoffs und zu Energieverlusten bei der Förderung des Kraftstoffs zu der Brennkraftmaschine. Um dieses Problem zu vermeiden behilft man sich in der Praxis damit, dass zwischen den Einlässen und den Fördermitteln jeweils ein Rückschlagventil eingesetzt wird. Dies führt jedoch zu einem sehr großen baulichen Aufwand der Kraftstoffversorgungsanlage.A disadvantage of the known fuel supply system that, for example, in one of two in-service funding fuel from one of the funding can flow to the switched off funding. This leads to an unnecessary circulation of the fuel and to energy losses in promoting the fuel to the internal combustion engine. In order to avoid this problem, one manages in practice with the fact that between the inlets and the conveying means in each case a check valve is used. However, this leads to a very large construction effort of the fuel supply system.

Der Erfindung liegt das Problem zugrunde, eine Kraftstoffversorgungsanlage der eingangs genannten Art so weiterzubilden, dass ein unnötiges Überströmen des Kraftstoffs über das Verbindungsstück vermieden wird und dass die Kraftstoffversorgungsanlage besonders einfach aufgebaut ist.The invention is based on the problem, a fuel supply system of the type mentioned in such a way that an unnecessary overflow of the fuel is avoided via the connector and that the fuel supply system is particularly simple.

Dieses Problem wird erfindungsgemäß dadurch gelöst, dass das Verbindungsstück ein Mischerventil aufweist und dass das Mischerventil bei einer Druckdifferenz zwischen den Einlassen den Einlass mit dem geringen Druck verschließt.This problem is inventively solved in that the connecting piece has a mixer valve and that the mixer valve closes the inlet at the low pressure at a pressure difference between the inlets.

Durch diese Gestaltung verhindert das Mischerventil, dass Kraftstoff von einem Einlass zu dem anderen Einlass überströmen kann. Daher wird verhindert, dass bei zwei an den Einlässen angeschlossenen Fördereinheiten, von denen jedoch nur eine in Betrieb ist, Kraftstoff zu der abgeschalteten Fördereinheit überströmen kann. Weiterhin erfordert die erfindungsgemäße Kraftstoffversorgungsanlage keine zusätzlichen Rückschlagventile in den von den Fördereinheiten zu dem Verbindungsstück führenden Leitungen. Daher setzt sich die erfindungsgemäße Kraftstoffversorgungsanlage aus besonders wenigen zu montierenden Bauteilen zusammen und ist damit besonders einfach aufgebaut. Selbstverständlich lassen sich durch hintereinander schalten mehrerer Mischerventile mehr als zwei Fördermittel mit einem einzigen Auslass zum Anschluss einer einzigen Kraftstoffleitung verbinden.This design prevents the mixer valve from overflowing fuel from one inlet to the other inlet. Therefore, it is prevented that at two connected to the inlets conveyor units, of which only one is in operation, fuel can flow to the shut-off conveyor unit. Furthermore, the fuel supply system according to the invention requires no additional check valves in the lines leading from the conveyor units to the connector. Therefore, the fuel supply system according to the invention consists of particularly few components to be assembled and is thus constructed particularly simple. Of course, can be connected by connecting several mixer valves more than two funding with a single outlet to connect a single fuel line.

Die Verbindung der von den Fördermitteln geförderten Kraftstoffströme gestaltet sich gemäß einer vorteilhaften Weiterbildung der Erfindung konstruktiv besonders einfach, wenn die Einlässe jeweils einen Ventilsitz aufweisen und wenn zwischen den Ventilsitzen ein Ventilkörper von dem Druck in den Einlässen beweglich geführt ist und wenn der Abstand der Ventilsitze größer ist als die Breite des Ventilkörpers. Zur Vermeidung von periodisch auftretenden Druckschwankungen kann die Bewegung des Ventilkörpers selbstverständlich gedämpft werden.The connection of the funded by the funding fuel flows designed according to an advantageous embodiment of the invention structurally particularly simple if the inlets each have a valve seat and if between the valve seats, a valve body is movably guided by the pressure in the inlets and if the distance of the valve seats larger is the width of the valve body. To avoid periodically occurring pressure fluctuations, the movement of the valve body can of course be damped.

Bei annähernd gleichem Druck in den Einlässen lässt sich der Verbraucher gemäß einer vorteilhaften Weiterbildung der Erfindung über beide Fördermittel mit Kraftstoff versorgen, wenn in einer Mittelstellung des Ventilkörpers zwischen den Ventilsitzen beide Einlässe mit dem Auslass verbunden sind. Hierdurch wird sichergestellt, dass bei einem hohen Bedarf der Brennkraftmaschine an Kraftstoff beide Fördereinheiten gemeinsam Kraftstoff fördern können.At approximately the same pressure in the inlets, according to an advantageous development of the invention, the consumer can be supplied with fuel via both conveying means if, in a middle position of the valve body, both inlets are connected to the outlet between the valve seats. In this way it is ensured that, when the internal combustion engine requires a great deal of fuel, both pumping units can jointly convey fuel.

Ein Leerlaufen einer zu der Brennkraftmaschine führenden Vorlaufleitung lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung vermeiden, wenn zwischen dem Mischerventil und dem Auslass ein Rückschlagventil angeordnet ist.An emptying of a leading to the engine flow line can be avoided according to another advantageous embodiment of the invention, when a check valve is disposed between the mixer valve and the outlet.

Bei einer Versorgung von Saugstrahlpumpen mit Kraftstoff lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung ein Saughebereffekt verhindern, wenn zwischen dem Mischerventil und dem Auslass ein Steuerventil angeordnet ist, welches im drucklosen Zustand den Auslass mit einer in den Kraftstoffbehälter mündenden Öffnung verbindet und im druckbehafteten Zustand die Öffnung verschließt. Durch diese Gestaltung ist bei einer Förderung der Fördermittel die Öffnung verschlossen und Kraftstoff strömt von dem Mischerventil des Verbindungsstücks zu dem Auslass und damit zu den Saugstrahlpumpen. Bei abgeschalteten Fördermitteln verhindert das Steuerventil jedoch ein Ansaugen von Kraftstoff über den Auslass.With a supply of suction jet pumps with fuel can be according to another advantageous embodiment of the invention prevent a Saughebereffekt when between the mixer valve and the outlet, a control valve is arranged, which connects the outlet with an opening into the fuel tank opening in the pressureless state and in the pressurized state the opening closes. Through this Design is closed at a promotion of the funding, the opening and fuel flows from the mixer valve of the connector to the outlet and thus to the ejector. However, with power off, the control valve prevents fuel from being drawn in via the outlet.

Die Montage der erfindungsgemäßen Kraftstoffversorgungsanlage gestaltet sich besonders einfach, wenn das Mischerventil mit dem Steuerventil oder dem Rückschlagventil als bauliche Einheit ausgebildet ist. Hierdurch lassen sich das Mischerventil mit dem Steuerventil oder mit dem Rückschlagventil außerhalb des Kraftstoffbehälters zu der baulichen Einheit vormontieren und anschließend mit geringem Aufwand in den Kraftstoffbehälter einsetzen.The assembly of the fuel supply system according to the invention is particularly simple if the mixer valve is formed with the control valve or the check valve as a structural unit. In this way, the mixer valve with the control valve or with the check valve outside the fuel tank can be preassembled to the structural unit and then use with little effort in the fuel tank.

Zur besonders kostengünstigen Fertigung der erfindungsgemäßen Kraftstoffversorgungsanlage trägt es bei, wenn das Mischerventil und das Steuerventil oder das Rückschlagventil ein gemeinsames Gehäuse aufweisen.For particularly cost-effective production of the fuel supply system according to the invention, it is beneficial if the mixer valve and the control valve or the check valve have a common housing.

Zur weiteren Verringerung der Fertigungskosten der erfindungsgemäßen Kraftstoffversorgungsanlage trägt es bei, wenn das Mischerventil und/oder das Steuerventil und/oder das Rückschlagventil gerade Kanäle zur Aufnahme des Ventilkörpers aufweisen und dass die Kanäle von einem Verschlussmittel verschlossen sind. Vorzugsweise ist das Verschlussmittel als formschlüssig mit dem Gehäuse verbundene Kappe oder Stopfen ausgebildet.To further reduce the manufacturing costs of the fuel supply system according to the invention, it is beneficial if the mixer valve and / or the control valve and / or the check valve have straight channels for receiving the valve body and that the channels are closed by a closure means. Preferably, the closure means is formed as a form-fitting connected to the housing cap or plug.

Das Mischerventil gestaltet sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung konstruktiv besonders einfach, wenn eines der Ventilsitze des Mischerventils in dem Verschlussmittel und der andere der Ventilsitze in dem Gehäuse angeordnet ist.The mixer valve designed in accordance with another advantageous embodiment of the invention structurally particularly simple when one of the valve seats of the mixer valve in the Closure means and the other of the valve seats is arranged in the housing.

Bei einer Aufteilung der Fördermittel in ein Grundlast-Fördermittel und ein Spitzenlast-Fördermittel lässt sich einer der Einlässe in Grundstellung einfach verschließen, wenn der Ventilkörper des Mischerventils in eine vorgesehene Stellung vorgespannt ist.In a distribution of the funding in a base load conveyor and a peak load conveyor can be one of the inlets in basic position simply close when the valve body of the mixer valve is biased in a designated position.

Die Führung des Ventilkörpers zwischen den beiden Ventilsitzen erfordert gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einen besonders geringen Aufwand, wenn der Ventilkörper des Mischerventils als Kugel ausgebildet ist.The leadership of the valve body between the two valve seats requires according to another advantageous embodiment of the invention, a particularly low cost when the valve body of the mixer valve is designed as a ball.

Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips sind mehrere davon in der Zeichnung dargestellt und werden nachfolgend beschrieben. Diese zeigt in

Fig. 1
schematisch eine erfindungsgemäße Kraftstoffversorgungsanlage mit zwei Fördereinheiten,
Fig. 2
eine Schnittdarstellung durch ein erstes Ventil der Kraftstoffversorgungsanlage aus Figur 1,
Fig. 3
eine Schnittdarstellung durch ein zweites Ventil der Kraftstoffversorgungsanlage aus Figur 1,
Fig. 4
ein Mischerventil in einer weiteren Ausführungsform des ersten oder zweiten Ventils aus Figur 1,
Fig. 5
das Mischerventil in einer weiteren Ausführungsform des ersten oder zweiten Ventils aus Figur 1.
The invention allows numerous embodiments. To further clarify its basic principle, several of them are shown in the drawing and will be described below. This shows in
Fig. 1
2 schematically shows a fuel supply system according to the invention with two delivery units,
Fig. 2
1 is a sectional view through a first valve of the fuel supply system of Figure 1,
Fig. 3
3 is a sectional view through a second valve of the fuel supply system of Figure 1,
Fig. 4
a mixer valve in a further embodiment of the first or second valve of FIG. 1,
Fig. 5
the mixer valve in a further embodiment of the first or second valve of Figure 1.

Figur 1 zeigt einen Kraftstoffbehälter 1 für ein Kraftfahrzeug mit einer Kraftstoffversorgungsanlage zur Versorgung einer Brennkraftmaschine 2 mit Kraftstoff. Der Kraftstoffbehälter 1 ist als Satteltank mit zwei Kammern 3, 3' ausgebildet und hat einen Einfüllstutzen 4. Die Kraftstoffversorgungsanlage hat zwei Fördereinheiten 5, 5' mit jeweils einem Schwalltopf 6, 6'. Unmittelbar oberhalb der Fördereinheiten 5, 5' weist der Kraftstoffbehälter 1 Montageflansche 7, 7' auf. Durch einen der Montageflansche 7' wird eine von den Fördereinheiten 5, 5' zu der Brennkraftmaschine 2 geführte Vorlaufleitung 8 hindurchgeführt. Hierbei handelt es sich um eine so genannte rücklauflose Kraftstoffversorgungsanlage, bei der kein von der Brennkraftmaschine 2 unverbrauchter Kraftstoff in den Kraftstoffbehälter 1 zurückgeführt wird.Figure 1 shows a fuel tank 1 for a motor vehicle with a fuel supply system for supplying an internal combustion engine 2 with fuel. The fuel tank 1 is formed as a saddle tank with two chambers 3, 3 'and has a filler neck 4. The fuel supply system has two conveyor units 5, 5', each with a swirl pot 6, 6 '. Immediately above the conveyor units 5, 5 ', the fuel tank 1 mounting flanges 7, 7' on. Through one of the mounting flanges 7 'one of the conveyor units 5, 5' guided to the internal combustion engine 2 feed line 8 is passed. This is a so-called non-return fuel supply system, in which no fuel unused by the internal combustion engine 2 is returned to the fuel tank 1.

Die Fördereinheiten sind 5, 5' jeweils elektrisch angetrieben und haben jeweils eine Vorstufe 9 und eine Hauptstufe 10. Die Hauptstufen 10 fördern Kraftstoff aus den Schwalltöpfen 6, 6' über ein erstes Verbindungsstück 11 zu der Brennkraftmaschine 2. Die Vorstufen 9 fördern Kraftstoff aus den Schwalltöpfen 6, 6' über ein zweites Verbindungsstück 12 zu in den Kammern 3, 3' angeordneten Saugstrahlpumpen 13, 13'. Die Saugstrahlpumpen 13, 13' werden hierdurch mit Kraftstoff als Treibmittel versorgt und fördern Kraftstoff aus den Kammern 3, 3' in die Schwalltöpfe 6, 6'. Weiterhin haben die Schwalltöpfe 6, 6' jeweils Bodenventil 14, über dass Kraftstoff aus dem Kraftstoffbehälter 1 in die Schwalltöpfe 3, 3' einströmt. Filter 15 der Hauptstufen 10 sind in den Schwalltöpfen 6, 6' angeordnet. Die Fördereinheiten 5, 5' lassen sich entsprechend dem Bedarf der Brennkraftmaschine 2 einzeln oder gemeinsam betreiben. Bei geringem Bedarf der Brennkraftmaschine 2 an Kraftstoff wird damit eine der Fördereinheiten 5, 5' abgeschaltet.The conveyor units are 5, 5 'each electrically driven and each have a precursor 9 and a main stage 10. The main stages 10 promote fuel from the surge chambers 6, 6' via a first connector 11 to the engine 2. The precursors 9 promote fuel from the Swirl pots 6, 6 'via a second connector 12 to in the chambers 3, 3' arranged suction jet pumps 13, 13 '. The Saugstrahlpumpen 13, 13 'are thereby supplied with fuel as a propellant and promote fuel from the chambers 3, 3' in the surge chambers 6, 6 '. Furthermore, the surge chambers 6, 6 'each bottom valve 14, via that fuel from the fuel tank 1 flows into the surge chambers 3, 3'. Filters 15 of the main stages 10 are arranged in the surge chambers 6, 6 '. The conveyor units 5, 5 'can be operated individually or jointly according to the needs of the internal combustion engine 2. With little need of the internal combustion engine 2 to fuel thus one of the conveyor units 5, 5 'is turned off.

Figur 2 das erste Verbindungsstück 11 der Kraftstoffversorgungsanlage aus Figur 1 in einer Schnittdarstellung. Hierbei ist zu erkennen, dass das Verbindungsstück 11 zwei Einlässe 16, 16' aufweist, welche jeweils mit den Hauptstufen 10 der Fördereinheiten 5, 5' aus Figur 1 verbunden sind. Weiterhin hat das Verbindungsstück 11 einen Auslass 17, an dem sich die in Figur 1 dargestellte, zu der Brennkraftmaschine 2 führende Vorlaufleitung 8 anschließen lässt. Das Verbindungsstück 11 weist ein Rückschlagventil 18 und ein Mischerventil 19 auf. Das Rückschlagventil 18 hat einen von einem Federelement 20 gegen einen Ventilsitz 21 vorgespannten Ventilkörper 22. Wenn keine der in Figur 1 dargestellten Fördereinheiten 5, 5' Kraftstoff fördert, drückt das Federelement 20 den Ventilkörper 22 gegen den Ventilsitz 21 und Verschließt den Auslass 17. Damit wird ein Leerlaufen der Vorlaufleitung 8 verhindert. Bei einer Förderung zumindest einer der Fördereinheiten 5, 5' wird der Ventilkörper 22 des Rückschlagventils 18 von dem Ventilsitz 21 weggedrückt und Kraftstoff strömt zu dem Auslass 17 des ersten Verbindungsstücks 11 und damit in die Vorlaufleitung 8. Das Mischerventil 19 hat einen zwischen zwei Ventilsitzen 23, 23' beweglich geführten, als Kugel ausgebildeten Ventilkörper 24. Bei einer Förderung nur einer der Fördereinheiten 5, 5' aus Figur 1 wird der Ventilkörper 24 gegen einen der Ventilsitze 23, 23' gedrückt und verschließt damit den Einlass 16, 16' der anderen Fördereinheit 5, 5'. Hierdurch wird verhindert, dass von der einen Fördereinheit 5, 5' geförderter Kraftstoff durch die abgeschaltete andere Fördereinheit 5, 5' in den Kraftstoffbehälter 1 zurück gefördert wird. Wenn beide in Figur 1 dargestellte Fördereinheiten 5, 5' Kraftstoff fördern, entsteht an dem Ventilkörper 24 des Mischerventils 19 ein Druckgleichgewicht, wodurch der Ventilkörper 24, wie in Figur 2 dargestellt, zwischen den Ventilsitzen 23, 23' gehalten ist. Damit wird keiner der Einlässe 16, 16' versperrt und beide Fördereinheiten 5, 5' fördern Kraftstoff durch das Rückschlagventil 18 zu dem zu der Brennkraftmaschine 2 führenden Auslass 17. Das erste Verbindungsstück 11 weist ein gemeinsames Gehäuse 25 für das Mischerventil 19 und das Rückschlagventil 18 auf. Das Mischerventil 19 und das Rückschlagventil sind 18 jeweils mit einer Kappe 26, 27 dicht verschlossen.Figure 2 shows the first connector 11 of the fuel supply system of Figure 1 in a sectional view. It can be seen that the connecting piece 11 has two inlets 16, 16 ', which are each connected to the main stages 10 of the conveyor units 5, 5' of FIG. Furthermore, the connecting piece 11 has an outlet 17, to which the feed line 8 shown in FIG. 1 and leading to the internal combustion engine 2 can be connected. The connecting piece 11 has a check valve 18 and a mixer valve 19. The check valve 18 has a biased by a spring element 20 against a valve seat 21 valve body 22. If none of the conveyor units 5, 5 'shown in Figure 1 promotes fuel, the spring element 20 presses the valve body 22 against the valve seat 21 and closes the outlet 17. Thus an idling of the flow line 8 is prevented. When a delivery of at least one of the conveyor units 5, 5 ', the valve body 22 of the check valve 18 is pushed away from the valve seat 21 and fuel flows to the outlet 17 of the first connector 11 and thus in the flow line 8. The mixer valve 19 has one between two valve seats 23rd When conveying only one of the conveyor units 5, 5 'of Figure 1, the valve body 24 is pressed against one of the valve seats 23, 23' and thus closes the inlet 16, 16 'of the other Feed unit 5, 5 '. This prevents that from the one conveyor unit 5, 5 'funded fuel through the switched-off other conveyor unit 5, 5' is conveyed back into the fuel tank 1. When both conveying units 5, 5 'shown in FIG. 1 convey fuel, a pressure equilibrium is created on the valve body 24 of the mixer valve 19, as a result of which the valve body 24 is held between the valve seats 23, 23', as shown in FIG. This will not be any of the inlets 16, 16 'blocked and both conveyor units 5, 5' convey fuel through the check valve 18 to the leading to the engine 2 outlet 17. The first connector 11 has a common housing 25 for the mixer valve 19 and the check valve 18. The mixer valve 19 and the check valve 18 are each sealed with a cap 26, 27.

Figur 3 zeigt das zweite Verbindungsstück 12 der Kraftstoffversorgungsanlage aus Figur 1, mit zwei Einlässen 28, 28' zum Anschluss der Vorstufen 9 der Fördereinheiten 5, 5' aus Figur 1 und einem Auslass 29, an welchem sich die beiden Saugstrahlpumpen 13, 13' anschließen lassen. Das zweite Verbindungsstück 12 weist ein Mischerventil 30 auf, welches wie das Mischerventil 19 des ersten Ventils 11 aus Figur 2 aufgebaut ist. Weiterhin hat das zweite Verbindungsstück 12 in Strömungsrichtung gesehen hinter dem Mischerventil 30 ein Steuerventil 31 mit einem von der Schwerkraft von einem Ventilsitz 32 entfernt gehaltenen Ventilkörper 33. Von dem Ventilkörper 33 aus gesehen hat das Steuerventil 31 hinter dem Ventilsitz 32 eine in den Kraftstoffbehälter 1 führende Öffnung 34. Bei einer Förderung zumindest einer der Fördereinheiten 5, 5' der Kraftstoffversorgungsanlage aus Figur 1 wird der Ventilkörper 33 gegen den Ventilsitz 32 gedrückt und verschließt die Öffnung 34. Damit wird Kraftstoff über den Auslass 29 zu den in Figur 1 dargestellten Saugstrahlpumpen 13, 13' gefördert. Wenn beide Fördereinheiten 5, 5' abgeschaltet sind, wird der Ventilkörper 33 des Steuerventils 31 durch die Schwerkraft von dem Ventilsitz 32 in die dargestellte Lage weggedrückt. Hierdurch wird der Auslass 29 mit der in den Kraftstoffbehälter 1 mündenden Öffnung 34 verbunden. Damit gelangt Luft in die zu den Saugstrahlpumpen 13, 13' führenden Leitungen. Ein Saughebereffekt, welcher zu einem Ansaugen von Kraftstoff durch die Vorstufen 9 der Fördereinheiten 5, 5' führen würde, wird damit verhindert.Figure 3 shows the second connector 12 of the fuel supply system of Figure 1, with two inlets 28, 28 'for connecting the precursors 9 of the conveyor units 5, 5' of Figure 1 and an outlet 29, to which the two Saugstrahlpumpen 13, 13 'connect to let. The second connector 12 has a mixer valve 30, which is constructed like the mixer valve 19 of the first valve 11 of Figure 2. Furthermore, the second connection piece 12, seen in the flow direction behind the mixer valve 30, has a control valve 31 with a valve body 33 held away from a valve seat 32 by gravity. From the valve body 33, the control valve 31 has a valve seat 32 leading into the fuel tank 1 Opening 34. When a delivery of at least one of the conveyor units 5, 5 'of the fuel supply system of Figure 1, the valve body 33 is pressed against the valve seat 32 and closes the opening 34. Thus, fuel through the outlet 29 to the illustrated in Figure 1 Saugstrahlpumpen 13, 13 'promoted. When both conveyor units 5, 5 'are turned off, the valve body 33 of the control valve 31 is pushed by gravity from the valve seat 32 in the position shown. As a result, the outlet 29 is connected to the opening into the fuel tank 1 opening 34. This air enters the lines leading to the suction jet pumps 13, 13 '. A siphon effect, which leads to a suction of fuel would lead through the precursors 9 of the conveyor units 5, 5 ', is thus prevented.

Figur 4 zeigt eine weitere Ausführungsform des Mischerventils 19, 30 ersten oder zweiten Verbindungsstücks 11, 12, welches sich von dem aus den Figuren 2 und 3 nur dadurch unterscheidet, dass ein zwischen zwei Ventilsitzen 36, 36' geführter Ventilkörper 35 tellerförmig gestaltet ist. Weiterhin kann der Ventilkörper 35 in einer nicht dargestellten Ausführungsform auch von einem Federelement beispielsweise in die Mittelstellung vorgespannt sein. Sofern die Fördereinheiten 5, 5' aus Figur 1 in eine Grundlast-Fördereinheit 5, 5' und eine Spitzenlast-Fördereinheit 5, 5' aufgeteilt sind, kann alternativ auch der Ventilkörper 33 gegen den zu der Spitzenlast-Fördereinheit 5, 5' führenden Ventilsitz 36, 36' vorgespannt sein. Damit ist ein zu der Spitzenlast-Fördereinheit 5, 5' führende Einlass 37, 37' stets dann verschlossen, wenn die Brennkraftmaschine 2 aus Figur 1 keinen erhöhten Bedarf an Kraftstoff anfordert.FIG. 4 shows a further embodiment of the mixer valve 19, 30 of first or second connecting piece 11, 12, which differs from that of FIGS. 2 and 3 only in that a valve body 35 guided between two valve seats 36, 36 'is dish-shaped. Furthermore, the valve body 35 may be biased by a spring element, for example in the middle position in an embodiment not shown. If the conveying units 5, 5 'from FIG. 1 are divided into a base load conveying unit 5, 5' and a peak load conveying unit 5, 5 ', alternatively the valve body 33 can also act against the valve seat leading to the peak load conveying unit 5, 5' 36, 36 'to be biased. Thus, an inlet 37, 37 'leading to the peak load delivery unit 5, 5' is always closed when the internal combustion engine 2 of FIG. 1 does not require an increased demand for fuel.

Figur 5 zeigt eine weitere Ausführungsform des Mischerventils 19, 30 für das erste oder zweite Ventil 11, 12 aus Figur 1, mit zwei Einlässen 38, 38' bei dem ein zu dem Steuerventil 31 aus Figur 3 oder dem Rückschlagventil 18 aus Figur 2 führender Kanal 39 unter einem der Einlässe 38 hindurchgeführt ist. Ein Ventilkörper 40 ist wie bei den Ausführungsformen des Mischerventils 19, 30 aus Figur 2 und 3 zwischen zwei Ventilsitzen 41, 41' beweglich geführt.FIG. 5 shows a further embodiment of the mixer valve 19, 30 for the first or second valve 11, 12 of FIG. 1, with two inlets 38, 38 'in which a channel leading to the control valve 31 from FIG. 3 or the check valve 18 from FIG 39 is passed under one of the inlets 38. As in the embodiments of the mixer valve 19, 30 of FIGS. 2 and 3, a valve body 40 is movably guided between two valve seats 41, 41 '.

Claims (11)

Kraftstoffversorgungsanlage zur Versorgung einer Brennkraftmaschine eines Kraftfahrzeuges mit zwei in einem Kraftstoffbehälter angeordneten Fördermitteln zum Fördern von Kraftstoff, mit einem Verbindungsstück zur Führung des von den Fördermitteln geförderten Kraftstoffs von zwei, jeweils mit den Fördermitteln verbundenen Einlässen zu einem Auslass, dadurch gekennzeichnet, dass das Verbindungsstück (11, 12) ein Mischerventil (19, 30) aufweist und dass das Mischerventil (19, 30) bei einer Druckdifferenz zwischen den Einlassen (16, 16' 28, 28', 37, 37', 38, 38') den Einlass (16, 16' 28, 28', 37, 37', 38, 38') mit dem geringen Druck verschließt.Fuel supply system for supplying an internal combustion engine of a motor vehicle, with two disposed in a fuel tank, conveyor means for the conveyance of fuel, with a connecting piece for guiding the conveyed by the conveying fuel from two, each with the conveying means associated inlets to an outlet, characterized in that the connecting piece ( 11, 12) has a mixer valve (19, 30) and that the mixer valve (19, 30) at a pressure difference between the inlets (16, 16 '28, 28', 37, 37 ', 38, 38') the inlet ( 16, 16 '28, 28', 37, 37 ', 38, 38') closes with the low pressure. Kraftstoffversorgungsanlage nach Anspruch 1, dadurch gekennzeichnet, dass die Einlässe (16, 16' 28, 28', 37, 37', 38, 38') jeweils einen Ventilsitz (23, 23', 36, 36', 41, 41') aufweisen und dass zwischen den Ventilsitzen (23, 23', 36, 36', 41, 41') ein Ventilkörper (24, 35, 40) von dem Druck in den Einlässen (16, 16' 28, 28', 37, 37', 38, 38') beweglich geführt ist und dass der Abstand der Ventilsitze (23, 23', 36, 36', 41, 41') größer ist als die Breite des Ventilkörpers (24, 35, 40).Fuel supply system according to claim 1, characterized in that the inlets (16, 16 '28, 28', 37, 37 ', 38, 38') each have a valve seat (23, 23 ', 36, 36', 41, 41 ') and that between the valve seats (23, 23 ', 36, 36', 41, 41 ') a valve body (24, 35, 40) of the pressure in the inlets (16, 16' 28, 28 ', 37, 37 ', 38, 38') is movably guided and that the distance of the valve seats (23, 23 ', 36, 36', 41, 41 ') is greater than the width of the valve body (24, 35, 40). Kraftstoffversorgungsanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in einer Mittelstellung des Ventilkörpers (24, 35, 40) zwischen den Ventilsitzen (23, 23', 36, 36', 41, 41') beide Einlässe (16, 16' 28, 28', 37, 37', 38, 38') mit dem Auslass (17, 29) verbunden sind.Fuel supply system according to claim 1 or 2, characterized in that in a middle position of the valve body (24, 35, 40) between the valve seats (23, 23 ', 36, 36', 41, 41 ') both inlets (16, 16' 28 , 28 ', 37, 37', 38, 38 ') are connected to the outlet (17, 29). Kraftstoffversorgungsanlage nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen dem Mischerventil (19) und dem Auslass (17) ein Rückschlagventil (18) angeordnet ist.Fuel supply system according to at least one of the preceding claims, characterized in that a check valve (18) is arranged between the mixer valve (19) and the outlet (17). Kraftstoffversorgungsanlage nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen dem Mischerventil (30) und dem Auslass (29) ein Steuerventil (31) angeordnet ist, welches im drucklosen Zustand den Auslass (29) mit einer in den Kraftstoffbehälter mündenden Öffnung (34) verbindet und im druckbehafteten Zustand die Öffnung (34) verschließt.Fuel supply system according to at least one of the preceding claims, characterized in that between the mixer valve (30) and the outlet (29) a control valve (31) is arranged, which in the pressureless state the outlet (29) with an opening into the fuel tank opening (34 ) and in the pressurized state, the opening (34) closes. Kraftstoffversorgungsanlage nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Mischerventil (19, 30) mit dem Steuerventil (31) oder dem Rückschlagventil (18) als bauliche Einheit ausgebildet ist.Fuel supply system according to at least one of the preceding claims, characterized in that the mixer valve (19, 30) with the control valve (31) or the check valve (18) is designed as a structural unit. Kraftstoffversorgungsanlage nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Mischerventil (19, 30) und das Steuerventil (31) oder das Rückschlagventil (18) ein gemeinsames Gehäuse (25) aufweisen.Fuel supply system according to at least one of the preceding claims, characterized in that the mixer valve (19, 30) and the control valve (31) or the check valve (18) have a common housing (25). Kraftstoffversorgungsanlage nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Mischerventil (19, 30) und/oder das Steuerventil (31) und/oder das Rückschlagventil (18) gerade Kanäle zur Aufnahme des Ventilkörpers (22, 24, 33, 35, 40) aufweisen und dass die Kanäle von einem Verschlussmittel verschlossen sind.Fuel supply system according to at least one of the preceding claims, characterized in that the mixer valve (19, 30) and / or the control valve (31) and / or the non-return valve (18) straight channels for receiving the valve body (22, 24, 33, 35, 40) and that the channels are closed by a closure means. Kraftstoffversorgungsanlage nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eines der Ventilsitze (23', 36', 41') des Mischerventils (19, 30) in dem Verschlussmittel und der andere der Ventilsitze (23, 36, 41) in dem Gehäuse (25) angeordnet ist.Fuel supply system according to at least one of the preceding claims, characterized in that one of the valve seats (23 ', 36', 41 ') of the mixer valve (19, 30) in the closure means and the other of the valve seats (23, 36, 41) in the housing (25) is arranged. Kraftstoffversorgungsanlage nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Ventilkörper (24, 35, 40) des Mischerventils (19, 30) in eine vorgesehene Stellung vorgespannt ist.Fuel supply system according to at least one of the preceding claims, characterized in that the valve body (24, 35, 40) of the mixer valve (19, 30) is biased in a predetermined position. Kraftstoffversorgungsanlage nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Ventilkörper (24, 40) des Mischerventils (19, 30) als Kugel ausgebildet ist.Fuel supply system according to at least one of the preceding claims, characterized in that the valve body (24, 40) of the mixer valve (19, 30) is designed as a ball.
EP20050106801 2004-08-25 2005-07-25 Fuel supply system Not-in-force EP1630405B1 (en)

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DE102004041203A1 (en) 2006-03-09
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US7222609B2 (en) 2007-05-29
EP1630405B1 (en) 2013-04-24

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