EP2878805B1 - Fuel delivery system with valve assembly - Google Patents

Fuel delivery system with valve assembly Download PDF

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Publication number
EP2878805B1
EP2878805B1 EP14190660.2A EP14190660A EP2878805B1 EP 2878805 B1 EP2878805 B1 EP 2878805B1 EP 14190660 A EP14190660 A EP 14190660A EP 2878805 B1 EP2878805 B1 EP 2878805B1
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EP
European Patent Office
Prior art keywords
valve
fuel
delivery system
valve chamber
inlet
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EP14190660.2A
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German (de)
French (fr)
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EP2878805A1 (en
Inventor
Zdenek Belda
Karel Marhoun
Vitezslav Prochazka
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • 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
    • F02M37/0029—Pressure regulator in the low pressure fuel 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
    • 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
    • F02M37/14—Feeding by means of driven pumps the pumps being combined with other apparatus
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators

Definitions

  • the invention relates to a valve arrangement for a fuel delivery system, which can be used for example for a motor vehicle.
  • a fuel delivery system in or on the fuel tank of diesel vehicles is a fuel delivery system, can be promoted with the fuel in the direction of a high-pressure pump.
  • the high pressure pump may then supply the fuel to a common rail injection system.
  • a pressure control valve or pressure relief valve is usually arranged in a branch on the delivery line, which can flow at a high pressure fuel back into the tank.
  • Diesel and especially biodiesel is usually hygroscopic and can absorb water from the environment. If the pressure control valve is closed, there is still fuel between the branch and the pressure control valve and water that has accumulated in the fuel, can be deposited on the pressure control valve and disturb its function in icing.
  • the operation of a fuel delivery system can be improved.
  • ice formation on the pressure regulating valve can be prevented or at least reduced.
  • valve assembly for a fuel delivery system.
  • the valve arrangement can be arranged together with a prefeed pump in a tank of a motor vehicle.
  • the fuel can be diesel.
  • the motor vehicle may be a car, truck or bus.
  • the valve arrangement comprises an attachment which comprises an inlet for connection to a delivery line of the fuel delivery system and a valve chamber which is connected to the inlet. Furthermore, the valve arrangement comprises a pressure regulating valve or pressure relief valve. A valve closure of the pressure regulating valve is arranged in the valve chamber; The pressure regulating valve is designed such that at a certain pressure in the valve chamber the valve closure opens and fuel flows from the valve chamber into the drain to lower the pressure in the valve chamber. For example, fuel can be pumped from a pump from the tank into the delivery line, which promotes the fuel, for example in the direction of a high-pressure pump. In order to prevent overpressure in the delivery line, the pressure regulating valve can drain fuel back into the tank when its pressure is too high.
  • the attachment comprises a discharge flow, which is in communication with the valve chamber, so that the valve closure is surrounded by the fuel even when the valve closure is closed.
  • the valve assembly has two ports on the valve chamber, an inlet through which fuel can flow into the valve chamber and a cavity before the valve closure and a Abströmablauf through which fuel can leave the valve chamber, even if the valve assembly and the valve closure is closed ,
  • fuel can flow from the inlet through the valve chamber into the outflow outlet.
  • the functional elements of the pressure regulating valve i. the valve closure or the valve element and the valve seat can be continuously rinsed or rinsed by fresh fuel. A collection of water condensate in the valve assembly and in particular in the valve chamber can be prevented.
  • the pressure control valve may be a spring-loaded valve, i. a valve member such as a valve ball or poppet is pressed against a pressure in the valve chamber against a valve seat.
  • a pressure which exerts on the valve element a force which is greater than the spring force, the valve element is moved away from the valve seat and fuel can flow through the valve closure in the direction of the outlet.
  • the valve chamber is cup-shaped and covers a valve head of the pressure regulating valve.
  • the valve chamber may have a substantially cylindrical shape with a lid, the lid facing the valve closure.
  • the valve head is supported by a ring element in the valve chamber.
  • the ring member may be disposed between an inner wall of the valve chamber and an outer wall of the valve head and, for example, clamp the valve head in the valve chamber.
  • an O-ring for sealing is arranged between the valve head and the valve chamber. Also, the O-ring may be disposed between an inner wall of the valve chamber and an outer wall of the valve head.
  • the inlet opens the valve closure opposite in the valve chamber.
  • the inlet may for example be a tubular connection for a line which opens into the lid of the valve chamber.
  • the outflow outlet leaves the valve chamber laterally next to the valve closure.
  • the outflow can also be a tubular connection for a line which opens into an example cylindrical side wall of the valve chamber.
  • the outflow is connected to the delivery line.
  • the fuel leaving the valve chamber through the outflow outlet can be returned to the delivery line. But it is also possible that this fuel is passed back into the tank.
  • the inlet has a larger cross-sectional area than the outflow.
  • the cross-sectional areas of the inlet and the Abströmablaufs can be adjusted how fast fuel flows with the valve assembly open and closed valve closure.
  • the flow through the valve is essentially only dependent on the pressure and the cross section of the valve (or the valve seat).
  • different inlet and Abströmqueritess vom one can influence a rinsing (and / or the flow velocity) of the closed valve.
  • the pressure regulating valve has a valve housing, which provides the valve seat and in which the valve element and the valve spring is accommodated.
  • the drain can also be provided in the valve housing, for example at one end, which is opposite the valve head with the valve closure.
  • the valve housing may be covered at one end with the valve head of the article, for example, a substantially cup-shaped element which may have two openings as an inlet and Abströmablauf.
  • the attachment may for example be connected to other components of the fuel delivery system and serve as a valve holder.
  • the pressure regulating valve may be mounted in the attachment by means of a fastener, such as one or more clips be attached.
  • the inlet and the outlet flow form a conveying path parallel to the conveying line.
  • a portion of the fuel may be diverted from the delivery line and then flow through the valve assembly. Subsequently, the fuel can be recombined with fuel, which has flowed parallel to this conveying path, for example in the direction of the high-pressure pump.
  • the parallel conveying path at least in sections, has a smaller cross-sectional area than the conveying line.
  • the entire fuel delivered through the delivery line flows through the valve chamber.
  • the entire flowing through the delivery line fuel is passed through the valve assembly.
  • Another aspect of the invention relates to a fuel delivery system for placement in a fuel tank of a vehicle that includes a delivery pump for delivering fuel to a delivery line and a valve assembly as described above and below.
  • the fuel delivery system may be located in a tank and / or used to deliver fuel from the tank toward a high pressure pump.
  • Fig. 1 shows a fuel delivery system 10 of a vehicle in a tank 12.
  • the fuel delivery system 10 includes a delivery pump 14 that delivers (for example, via a fuel filter) fuel from the tank 12 into a delivery line 16. The fuel is then forwarded to a high-pressure pump 18 and from there to the engine of the vehicle.
  • valve arrangement 20 Connected to the delivery line 16 is a valve arrangement 20, which comprises a pressure regulating valve 21 which is designed to open at too high a pressure in the delivery line 16 and to lower the pressure from the delivery line into the tank 12 to lower the pressure.
  • the fuel flows via a feed line 22 into the valve arrangement 20 and from a drain 24 from the valve arrangement 20 into the tank 12.
  • valve assembly 20 To continuously flush with fuel at least a portion of the interior of the valve assembly 20, the valve assembly 20 has a further drain 26 and Abströmablauf 26 from the fuel, the valve assembly 20 can leave, even if the pressure control valve 21 is closed.
  • the delivery line 16, the inlet 22 and / or the outflow 26 are designed such that when the feed pump 14 is running at least a portion of the fuel through the inlet 22 through the valve assembly 20 and through the outflow 26 flows back into the delivery line 16. Like in the Fig. 1 This can be done via a parallel conveying path 27 to a section 28 of the delivery line 16 (the example Cross-sectional area than other areas of the delivery line 16 has). Alternatively, all of the fuel may flow through the valve assembly 20. The section 28 is then not necessary.
  • FIG. 2 a perspective view of a valve assembly 20 is shown.
  • the valve arrangement 20 comprises an attachment 30 which is manufactured integrally with further components 32 of the fuel delivery system 10, for example a housing of the delivery pump 14 and / or which can serve as a holder for the pressure regulation valve 21.
  • a substantially cylindrical housing 34 is accommodated for the pressure regulating valve 21.
  • the housing 34 has an annular edge 36, via which the pressure regulating valve 21 is fastened to the attachment 30 via two clamps 38.
  • the top 30 includes the inlet 22 and the outflow 26, which protrude in the form of tubes from the top 30 and / or are made integrally or integrally with the cap 30.
  • the inlet 22 and the outflow 26 have on the outside of a corrugation 40, on each of which a fuel hose of the delivery line 16 can be inserted.
  • the Fig. 3 shows the valve assembly 20 in cross section (with functional elements have been omitted in the interior of the valve housing 34, but in the Fig. 4 are shown).
  • the attachment 30 has a substantially cylindrical shape, with a cylindrical side wall 42 and a cover 44, which together with the side wall 42 forms a pot into which a valve head 46 of the pressure control valve 21 protrudes.
  • valve chamber 48 is formed, which is bounded by a valve closure 50 on the valve head 46, the side wall 42 and the cover 44.
  • the valve closure 50 is a portion of the pressure regulating valve which projects into the valve chamber 48 and closes the valve chamber 48.
  • the valve closure 50 comprises a valve seat 56 and a movable valve element 55, which cooperates with the valve seat 56 and is pressed by a valve spring 54 against the valve seat 56.
  • In the valve chamber 48 open the inlet 22 and the outflow 26.
  • the inlet 22 ends, for example, in the cover 44, the outflow 26, for example, in the Side wall below the upper edge of the valve head 46 and the valve closure 50. Both the inlet 22 and the Abströmablauf protrude laterally from the top 30 from.
  • the inlet 22 may have a larger cross-sectional area than the outflow 26. With the different cross-sectional areas can be adjusted how fast fuel in the open and closed state of the pressure control valve 21 flows through the valve chamber 48.
  • the housing 34 is made of two cup-shaped components 52, 54, which are interconnected via the folded edge 36.
  • the drain 24 of the pressure regulating valve 21 is formed in the bottom of the lower component 54.
  • the Fig. 3 shows that the inlet 22 can open on the same side as the outflow 26 into the valve chamber 48.
  • the outflow 26 may also open above the valve closure 50 or in the region of the valve closure 50 in the valve chamber 48.
  • the pressure control valve 21 may be a diaphragm valve.
  • a resilient diaphragm 52 is received, which presses together with the spring 54, the valve member 55 against the valve seat 56 to hold the pressure regulating valve 21 in the closed state.
  • Fuel from the valve chamber 48 can flow through an opening 58 in the pressure control valve 21 and push the valve member 55 against the force of the diaphragm 52 and the spring 54 from the valve seat 56 and at sufficiently high pressure, and fuel from the valve chamber 48 through the housing 34th flow to drain 24.
  • the region of the outlet 24, on which the valve element 58 is supported, is designed to be resilient, so that the valve element 58 can move away from the valve seat.
  • the valve head 46 is supported by a ring member 60 on the inner wall of the valve chamber 48, which has a substantially L-shaped cross-section. Between the inner wall of the valve chamber 48 and an outer wall of the valve head 46, an O-ring 62 is arranged, which seals the valve chamber 48 from the environment.

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

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft eine Ventilanordnung für ein Kraftstofffördersystem, das beispielsweise für ein Kraftfahrzeug verwendet werden kann.The invention relates to a valve arrangement for a fuel delivery system, which can be used for example for a motor vehicle.

Hintergrund der ErfindungBackground of the invention

Insbesondere im oder am Kraftstofftank von Dieselfahrzeugen befindet sich ein Kraftstofffördersystem, mit dem Kraftstoff in Richtung einer Hochdruckpumpe gefördert werden kann. Die Hochdruckpumpe kann den Kraftstoff dann einem Common-Rail-Einspritzsystem zuführen.
Um einen Überdruck in der Förderleitung zwischen einer Förderpumpe und der Hochdruckpumpe zu verhindern, ist in der Regel ein Druckregelventil bzw. Überdruckventil in eine Abzweigung an der Förderleitung angeordnet, das bei einem zu hohen Druck Kraftstoff in den Tank zurückfließen lassen kann. Dieses System ist in dem Patentdokument US 5873349 offenbart. Diesel und insbesondere Biodiesel ist normalerweise hygroskopisch und kann Wasser aus der Umgebung aufnehmen. Ist das Druckregelventil geschlossen, befindet sich unbewegter Kraftstoff zwischen der Abzweigung und dem Druckregelventil und Wasser, das sich im Kraftstoff gesammelt hat, kann sich am Druckregelventil ablagern und dessen Funktion bei Vereisung stören.In particular, in or on the fuel tank of diesel vehicles is a fuel delivery system, can be promoted with the fuel in the direction of a high-pressure pump. The high pressure pump may then supply the fuel to a common rail injection system.
In order to prevent an overpressure in the delivery line between a feed pump and the high-pressure pump, a pressure control valve or pressure relief valve is usually arranged in a branch on the delivery line, which can flow at a high pressure fuel back into the tank. This system is in the patent document US 5873349 disclosed. Diesel and especially biodiesel is usually hygroscopic and can absorb water from the environment. If the pressure control valve is closed, there is still fuel between the branch and the pressure control valve and water that has accumulated in the fuel, can be deposited on the pressure control valve and disturb its function in icing.

Zusammenfassung der ErfindungSummary of the invention

Mit der Erfindung kann die Funktionsweise eines Kraftstofffördersystems verbessert werden. Insbesondere kann ein Bilden von Eis am Druckregelventil verhindert oder zumindest vermindert werden.With the invention, the operation of a fuel delivery system can be improved. In particular, ice formation on the pressure regulating valve can be prevented or at least reduced.

Diese Vorteile können mit dem Gegenstand der unabhängigen Ansprüche erreicht werden. Weitere Ausführungsformen der Erfindung ergeben sich aus den abhängigen Ansprüchen und aus der folgenden Beschreibung.These advantages can be achieved with the subject matter of the independent claims. Further embodiments of the invention will become apparent from the dependent claims and from the following description.

Ein Aspekt der Erfindung betrifft eine Ventilanordnung für ein Kraftstofffördersystem. Die Ventilanordnung kann zusammen mit einer Vorförderpumpe in einem Tank eines Kraftfahrzeugs angeordnet sein. Der Kraftstoff kann Diesel sein. Das Kraftfahrzeug kann ein Pkw, Lkw oder Bus sein.One aspect of the invention relates to a valve assembly for a fuel delivery system. The valve arrangement can be arranged together with a prefeed pump in a tank of a motor vehicle. The fuel can be diesel. The motor vehicle may be a car, truck or bus.

Gemäß einer Ausführungsform der Erfindung umfasst die Ventilanordnung einen Aufsatz, der einen Zulauf zum Anschließen an eine Förderleitung des Kraftstofffördersystems und eine Ventilkammer, die mit dem Zulauf verbunden ist, umfasst. Weiter umfasst die Ventilanordnung ein Druckregelventil bzw. Überdruckventil. Ein Ventilverschluss des Druckregelventils ist dabei in der Ventilkammer angeordnet ist; Das Druckregelventil ist derart ausgeführt, dass bei einem bestimmten Druck in der Ventilkammer der Ventilverschluss öffnet und Kraftstoff von der Ventilkammer in den Ablauf strömt, um den Druck in der Ventilkammer zu senken. Beispielsweise kann Kraftstoff von einer Förderpumpe aus dem Tank in die Förderleitung gepumpt werden, die den Kraftstoff beispielsweise in Richtung einer Hochdruckpumpe fördert. Um einen Überdruck in der Förderleitung zu verhindern, kann das Druckregelventil bei zu hohem Druck Kraftstoff durch seinen Ablauf wieder in den Tank zurück ablassen.According to one embodiment of the invention, the valve arrangement comprises an attachment which comprises an inlet for connection to a delivery line of the fuel delivery system and a valve chamber which is connected to the inlet. Furthermore, the valve arrangement comprises a pressure regulating valve or pressure relief valve. A valve closure of the pressure regulating valve is arranged in the valve chamber; The pressure regulating valve is designed such that at a certain pressure in the valve chamber the valve closure opens and fuel flows from the valve chamber into the drain to lower the pressure in the valve chamber. For example, fuel can be pumped from a pump from the tank into the delivery line, which promotes the fuel, for example in the direction of a high-pressure pump. In order to prevent overpressure in the delivery line, the pressure regulating valve can drain fuel back into the tank when its pressure is too high.

Der Aufsatz umfasst einen Abströmablauf, der mit der Ventilkammer in Verbindung steht, so dass der Ventilverschluss auch bei geschlossenem Ventilverschluss vom Kraftstoff umströmt ist. Das Ventilanordnung weist zwei Anschlüsse an der Ventilkammer auf, einen Zulauf, durch den Kraftstoff in die Ventilkammer bzw. einen Hohlraum vor dem Ventilverschluss strömen kann und einen Abströmablauf, durch den Kraftstoff die Ventilkammer verlassen kann, auch wenn das Ventilanordnung bzw. der Ventilverschluss geschlossen ist.The attachment comprises a discharge flow, which is in communication with the valve chamber, so that the valve closure is surrounded by the fuel even when the valve closure is closed. The valve assembly has two ports on the valve chamber, an inlet through which fuel can flow into the valve chamber and a cavity before the valve closure and a Abströmablauf through which fuel can leave the valve chamber, even if the valve assembly and the valve closure is closed ,

Bei einem Druckgefälle zwischen Zulauf und Abströmablauf kann Kraftstoff von dem Zulauf durch die Ventilkammer in den Abströmablauf strömen. Die Funktionselemente des Druckregelventils, d.h. der Ventilverschluss bzw. das Ventilelement und der Ventilsitz, können kontinuierlich von frischem Kraftstoff umspült bzw. abgespült werden. Ein Sammeln von Wasserkondensat in der Ventilanordnung und insbesondere in der Ventilkammer kann verhindert werden.At a pressure gradient between inlet and outflow, fuel can flow from the inlet through the valve chamber into the outflow outlet. The functional elements of the pressure regulating valve, i. the valve closure or the valve element and the valve seat can be continuously rinsed or rinsed by fresh fuel. A collection of water condensate in the valve assembly and in particular in the valve chamber can be prevented.

Auf diese Weise wird Wasser, das sich in der Ventilkammer eventuell gesammelt hat, vom strömenden Kraftstoff mitgenommen und kann auch nicht am Ventilverschluss festfrieren. Auf diese Weise kann eine Funktionsstörung des Druckregelventils durch Eis bei Minus-Temperaturen verhindert werden.In this way, water that may have accumulated in the valve chamber, entrained by the flowing fuel and can not freeze on the valve closure. In this way, a malfunction of the pressure regulating valve can be prevented by ice at minus temperatures.

Das Druckregelventil kann ein federbelastetes Ventil sein, d.h. ein Ventilelement wie etwa eine Ventilkugel oder ein Ventilkegel wird entgegen einem Druck in der Ventilkammer gegen einen Ventilsitz gepresst. Ist ein Druck erreicht, der auf das Ventilelement eine Kraft ausübt, die größer ist als die Federkraft, wird das Ventilelement von dem Ventilsitz wegbewegt und Kraftstoff kann durch den Ventilverschluss in Richtung Ablauf strömen.The pressure control valve may be a spring-loaded valve, i. a valve member such as a valve ball or poppet is pressed against a pressure in the valve chamber against a valve seat. When a pressure is reached which exerts on the valve element a force which is greater than the spring force, the valve element is moved away from the valve seat and fuel can flow through the valve closure in the direction of the outlet.

Gemäß einer Ausführungsform der Erfindung ist die Ventilkammer topfförmig ausgeführt und überdeckt einen Ventilkopf des Druckregelventils. Die Ventilkammer kann eine im Wesentlichen zylinderförmige Form mit einem Deckel aufweisen, wobei der Deckel dem Ventilverschluss gegenüberliegt.According to one embodiment of the invention, the valve chamber is cup-shaped and covers a valve head of the pressure regulating valve. The valve chamber may have a substantially cylindrical shape with a lid, the lid facing the valve closure.

Gemäß einer Ausführungsform der Erfindung ist der Ventilkopf mit einem Ringelement in der Ventilkammer abgestützt. Das Ringelement kann zwischen einer Innenwandung der Ventilkammer und einer Außenwandung des Ventilkopfes angeordnet sein und beispielsweise den Ventilkopf in der Ventilkammer festklemmen.According to one embodiment of the invention, the valve head is supported by a ring element in the valve chamber. The ring member may be disposed between an inner wall of the valve chamber and an outer wall of the valve head and, for example, clamp the valve head in the valve chamber.

Gemäß einer Ausführungsform der Erfindung ist zwischen dem Ventilkopf und der Ventilkammer ein O-Ring zur Abdichtung angeordnet. Auch der O-Ring kann zwischen einer Innenwandung der Ventilkammer und einer Außenwandung des Ventilkopfes angeordnet sein.According to one embodiment of the invention, an O-ring for sealing is arranged between the valve head and the valve chamber. Also, the O-ring may be disposed between an inner wall of the valve chamber and an outer wall of the valve head.

Gemäß einer Ausführungsform der Erfindung mündet der Zulauf dem Ventilverschluss gegenüberliegend in die Ventilkammer. Der Zulauf kann beispielsweise ein rohrförmiger Anschluss für eine Leitung sein, der in den Deckel der Ventilkammer mündet.According to one embodiment of the invention, the inlet opens the valve closure opposite in the valve chamber. The inlet may for example be a tubular connection for a line which opens into the lid of the valve chamber.

Gemäß einer Ausführungsform der Erfindung verlässt der Abströmablauf seitlich neben dem Ventilverschluss die Ventilkammer. Auch der Abströmablauf kann ein rohrförmiger Anschluss für eine Leitung sein, der in eine beispielsweise zylinderförmige Seitenwand der Ventilkammer mündet.According to one embodiment of the invention, the outflow outlet leaves the valve chamber laterally next to the valve closure. The outflow can also be a tubular connection for a line which opens into an example cylindrical side wall of the valve chamber.

Gemäß einer Ausführungsform der Erfindung ist der Abströmablauf mit der Förderleitung verbunden. Der die Ventilkammer durch den Abströmablauf verlassende Kraftstoff kann wieder in die Förderleitung zurückgeleitet werden. Es ist aber auch möglich, dass dieser Kraftstoff zurück in den Tank geleitet wird.According to one embodiment of the invention, the outflow is connected to the delivery line. The fuel leaving the valve chamber through the outflow outlet can be returned to the delivery line. But it is also possible that this fuel is passed back into the tank.

Gemäß einer Ausführungsform der Erfindung weist der Zulauf eine größere Querschnittsfläche als der Abströmablauf auf. Mit den Querschnittsflächen des Zulaufs und des Abströmablaufs kann eingestellt werden, wie schnell Kraftstoff bei geöffnetem und bei geschlossenem Ventilverschluss durch die Ventilanordnung strömt. Der Durchfluss durch das Ventil ist im Wesentlichen nur von Druck und vom Querschnitt des Ventils (bzw. des Ventilsitzes) abhängig. Mit verschiedenen Zulauf- und Abströmquerschnittsflächen kann man ein Abspülen (und/oder die Stromgeschwindigkeit) des geschlossenen Ventils beeinflussen.According to one embodiment of the invention, the inlet has a larger cross-sectional area than the outflow. With the cross-sectional areas of the inlet and the Abströmablaufs can be adjusted how fast fuel flows with the valve assembly open and closed valve closure. The flow through the valve is essentially only dependent on the pressure and the cross section of the valve (or the valve seat). With different inlet and Abströmquerschnittsflächen one can influence a rinsing (and / or the flow velocity) of the closed valve.

Gemäß einer Ausführungsform der Erfindung weist das Druckregelventil ein Ventilgehäuse auf, das den Ventilsitz bereitstellt und in dem das Ventilelement sowie die Ventilfeder aufgenommen ist. In dem Ventilgehäuse kann auch der Ablauf vorgesehen sein, beispielsweise an einem Ende, das dem Ventilkopf mit dem Ventilverschluss gegenüberliegt.According to one embodiment of the invention, the pressure regulating valve has a valve housing, which provides the valve seat and in which the valve element and the valve spring is accommodated. The drain can also be provided in the valve housing, for example at one end, which is opposite the valve head with the valve closure.

Das Ventilgehäuse kann an einem Ende mit dem Ventilkopf von dem Aufsatz überdeckt werden, einem beispielsweise im Wesentlichen topfförmigen Element, das zwei Öffnungen als Zulauf und Abströmablauf aufweisen kann. Der Aufsatz kann beispielsweise mit weiteren Komponenten des Kraftstofffördersystems verbunden sein und als ventilhalter dienen. Das Druckregelventil kann mittels eines Befestigungsmittels, wie etwa einer oder mehrerer Klammern, im Aufsatz befestigt sein.The valve housing may be covered at one end with the valve head of the article, for example, a substantially cup-shaped element which may have two openings as an inlet and Abströmablauf. The attachment may for example be connected to other components of the fuel delivery system and serve as a valve holder. The pressure regulating valve may be mounted in the attachment by means of a fastener, such as one or more clips be attached.

Gemäß einer Ausführungsform der Erfindung bilden der Zulauf und der Abströmablauf einen Förderweg parallel zur Förderleitung. Beispielsweise kann ein Teil des Kraftstoffs von der Förderleitung abgezweigt werden und dann die Ventilanordnung durchströmen. Anschließend kann der Kraftstoff wieder mit Kraftstoff zusammengeführt werden, der parallel zu diesem Förderweg beispielsweise in Richtung Hochdruckpumpe geströmt ist.
Gemäß einer Ausführungsform der Erfindung weist der parallele Förderweg zumindest abschnittsweise eine geringere Querschnittsfläche auf als die Förderleitung.According to one embodiment of the invention, the inlet and the outlet flow form a conveying path parallel to the conveying line. For example, a portion of the fuel may be diverted from the delivery line and then flow through the valve assembly. Subsequently, the fuel can be recombined with fuel, which has flowed parallel to this conveying path, for example in the direction of the high-pressure pump.
According to one embodiment of the invention, the parallel conveying path, at least in sections, has a smaller cross-sectional area than the conveying line.

Gemäß einer Ausführungsform der Erfindung strömt der gesamte durch die Förderleitung geförderte Kraftstoff durch die Ventilkammer. Anderseits ist es möglich, dass der gesamte durch die Förderleitung strömende Kraftstoff durch die Ventilanordnung geführt wird.According to one embodiment of the invention, the entire fuel delivered through the delivery line flows through the valve chamber. On the other hand, it is possible that the entire flowing through the delivery line fuel is passed through the valve assembly.

Ein weiterer Aspekt der Erfindung betrifft ein Kraftstofffördersystem bzw. eine Kraftstofffördereinheit zum Anordnen in einem Kraftstofftank eines Fahrzeugs, das eine Förderpumpe zum Fördern von Kraftstoff in eine Förderleitung und eine Ventilanordnung, so wie sie obenstehend und untenstehend beschrieben ist, umfasst. Das Kraftstofffördersystem kann beispielsweise in einem Tank angeordnet sein und/oder dazu verwendet werden, Kraftstoff aus dem Tank in Richtung einer Hochdruckpumpe zu fördern.Another aspect of the invention relates to a fuel delivery system for placement in a fuel tank of a vehicle that includes a delivery pump for delivering fuel to a delivery line and a valve assembly as described above and below. For example, the fuel delivery system may be located in a tank and / or used to deliver fuel from the tank toward a high pressure pump.

Kurze Beschreibung der FigurenBrief description of the figures

Im Folgenden werden Ausführungsbeispiele der Erfindung mit Bezug auf die beiliegenden Figuren detailliert beschrieben.

  • Fig. 1 zeigt ein Kraftstofffördersystem gemäß einer Ausführungsform der Erfindung.
  • Fig. 2 zeigt eine perspektivische Ansicht einer Ventilanordnung gemäß einer Ausführungsform der Erfindung.
  • Fig. 3 zeigt eine Schnittansicht der Ventilanordnung aus Fig. 2.
  • Fig. 4 zeigt eine Schnittansicht einer Ventilanordnung gemäß einer weiteren Ausführungsform der Erfindung.
Embodiments of the invention will now be described in detail with reference to the accompanying drawings.
  • Fig. 1 shows a fuel delivery system according to an embodiment of the invention.
  • Fig. 2 shows a perspective view of a valve assembly according to an embodiment of the invention.
  • Fig. 3 shows a sectional view of the valve assembly Fig. 2 ,
  • Fig. 4 shows a sectional view of a valve assembly according to another embodiment of the invention.

Grundsätzlich sind identische oder ähnliche Teile mit den gleichen Bezugszeichen versehen.Basically, identical or similar parts are provided with the same reference numerals.

Detaillierte Beschreibung von AusführungsbeispielenDetailed description of embodiments

Fig. 1 zeigt ein Kraftstofffördersystem 10 eines Fahrzeugs in einem Tank 12. Das Kraftstofffördersystem 10 umfasst eine Förderpumpe 14, die (beispielsweise über einen Kraftstofffilter) Kraftstoff aus dem Tank 12 in eine Förderleitung 16 fördert. Der Kraftstoff wird dann weiter zu einer Hochdruckpumpe 18 und von dort zum Motor des Fahrzeugs weitergeleitet. Fig. 1 shows a fuel delivery system 10 of a vehicle in a tank 12. The fuel delivery system 10 includes a delivery pump 14 that delivers (for example, via a fuel filter) fuel from the tank 12 into a delivery line 16. The fuel is then forwarded to a high-pressure pump 18 and from there to the engine of the vehicle.

Mit der Förderleitung 16 steht eine Ventilanordnung 20 in Verbindung, die ein Druckregelventil 21 umfasst, das dazu ausgeführt ist, bei einem zu hohen Druck in der Förderleitung 16 zu öffnen und zum Senken des Drucks Kraftstoff aus der Förderleitung in den Tank 12 zurück abzulassen. Der Kraftstoff strömt dabei über eine Zuleitung 22 in die Ventilanordnung 20 und aus einem Ablauf 24 aus der Ventilanordnung 20 in den Tank 12.Connected to the delivery line 16 is a valve arrangement 20, which comprises a pressure regulating valve 21 which is designed to open at too high a pressure in the delivery line 16 and to lower the pressure from the delivery line into the tank 12 to lower the pressure. The fuel flows via a feed line 22 into the valve arrangement 20 and from a drain 24 from the valve arrangement 20 into the tank 12.

Um zumindest einen Teil des Innenraums der Ventilanordnung 20 kontinuierlich mit Kraftstoff zu spülen, weist die Ventilanordnung 20 einen weiteren Ablauf 26 bzw. Abströmablauf 26 auf, aus dem Kraftstoff die Ventilanordnung 20 verlassen kann, auch wenn das Druckregelventil 21 geschlossen ist.To continuously flush with fuel at least a portion of the interior of the valve assembly 20, the valve assembly 20 has a further drain 26 and Abströmablauf 26 from the fuel, the valve assembly 20 can leave, even if the pressure control valve 21 is closed.

Die Förderleitung 16, der Zulauf 22 und/oder der Abströmablauf 26 sind derart ausgeführt, dass bei laufender Förderpumpe 14 immer zumindest ein Teil des Kraftstoffes über den Zulauf 22 durch die Ventilanordnung 20 und durch den Abströmablauf 26 zurück in die Förderleitung 16 strömt. Wie in der Fig. 1 gezeigt, kann dies über einen parallelen Förderweg 27 zu einem Abschnitt 28 der Förderleitung 16 geschehen (der beispielsweise eine geringere Querschnittsfläche als andere Bereiche der Förderleitung 16 aufweist). Alternativ kann der gesamte Kraftstoff durch die Ventilanordnung 20 strömen. Der Abschnitt 28 ist dann nicht notwendig.The delivery line 16, the inlet 22 and / or the outflow 26 are designed such that when the feed pump 14 is running at least a portion of the fuel through the inlet 22 through the valve assembly 20 and through the outflow 26 flows back into the delivery line 16. Like in the Fig. 1 This can be done via a parallel conveying path 27 to a section 28 of the delivery line 16 (the example Cross-sectional area than other areas of the delivery line 16 has). Alternatively, all of the fuel may flow through the valve assembly 20. The section 28 is then not necessary.

In der Fig. 2 ist eine perspektivische Ansicht einer Ventilanordnung 20 gezeigt. Die Ventilanordnung 20 umfasst einen Aufsatz 30, der integral mit weiteren Komponenten 32 des Kraftstofffördersystems 10 gefertigt ist, beispielsweise einem Gehäuse der Förderpumpe 14 und/oder der als Halter für das Druckregelventil 21 dienen kann. In dem Aufsatz 30 ist ein im Wesentlichen zylinderförmiges Gehäuse 34 für das Druckregelventil 21 aufgenommen. Das Gehäuse 34 weist einen ringförmigen Rand 36 auf, über den das Druckregelventil 21 über zwei Klammern 38 am Aufsatz 30 befestigt ist.In the Fig. 2 a perspective view of a valve assembly 20 is shown. The valve arrangement 20 comprises an attachment 30 which is manufactured integrally with further components 32 of the fuel delivery system 10, for example a housing of the delivery pump 14 and / or which can serve as a holder for the pressure regulation valve 21. In the article 30, a substantially cylindrical housing 34 is accommodated for the pressure regulating valve 21. The housing 34 has an annular edge 36, via which the pressure regulating valve 21 is fastened to the attachment 30 via two clamps 38.

Wie in der Fig. 2 weiter zu erkennen ist, umfasst der Aufsatz 30 den Zulauf 22 und den Abströmablauf 26, die in der Form von Rohren von dem Aufsatz 30 abstehen und/oder integral bzw. einstückig mit dem Aufsatz 30 gefertigt sind. Der Zulauf 22 und der Abströmablauf 26 weisen an der Außenseite eine Riffelung 40 auf, auf die jeweils ein Kraftstoffschlauch der Förderleitung 16 gesteckt werden kann.Like in the Fig. 2 can be seen, the top 30 includes the inlet 22 and the outflow 26, which protrude in the form of tubes from the top 30 and / or are made integrally or integrally with the cap 30. The inlet 22 and the outflow 26 have on the outside of a corrugation 40, on each of which a fuel hose of the delivery line 16 can be inserted.

Die Fig. 3 zeigt die Ventilanordnung 20 im Querschnitt (wobei Funktionselemente im Inneren des Ventilgehäuses 34 weggelassen wurden, die aber in der Fig. 4 gezeigt sind). Der Aufsatz 30 weist eine im Wesentlichen zylinderförmige Form auf, mit einer zylindrischen Seitenwand 42 und einem Deckel 44, der zusammen mit der Seitenwand 42 einen Topf bildet, in den ein Ventilkopf 46 des Druckregelventils 21 hineinragt.The Fig. 3 shows the valve assembly 20 in cross section (with functional elements have been omitted in the interior of the valve housing 34, but in the Fig. 4 are shown). The attachment 30 has a substantially cylindrical shape, with a cylindrical side wall 42 and a cover 44, which together with the side wall 42 forms a pot into which a valve head 46 of the pressure control valve 21 protrudes.

Zwischen dem Aufsatz 30 und dem Ventilkopf 46 ist eine Ventilkammer 48 gebildet, die von einem Ventilverschluss 50 am Ventilkopf 46, der Seitenwand 42 und dem Deckel 44 begrenzt wird. Der Ventilverschluss 50 ist ein Abschnitt des Druckregelventils, der in die Ventilkammer 48 hineinragt und die Ventilkammer 48 verschließt. Der Ventilverschluss 50 umfasst einen Ventilsitz 56 und ein mit dem Ventilsitz 56 zusammenwirkendes, bewegliches Ventilelement 55, das von einer Ventilfeder 54 an den Ventilsitz 56 gedrückt wird. In die Ventilkammer 48 münden der Zulauf 22 und der Abströmablauf 26. Der Zulauf 22 endet dabei beispielsweise im Deckel 44, der Abströmablauf 26 beispielsweise in der Seitenwand unterhalb der Oberkante des Ventilkopfes 46 bzw. des Ventilverschlusses 50. Sowohl der Zulauf 22 als auch der Abströmablauf ragen dabei seitlich vom Aufsatz 30 ab.Between the cap 30 and the valve head 46, a valve chamber 48 is formed, which is bounded by a valve closure 50 on the valve head 46, the side wall 42 and the cover 44. The valve closure 50 is a portion of the pressure regulating valve which projects into the valve chamber 48 and closes the valve chamber 48. The valve closure 50 comprises a valve seat 56 and a movable valve element 55, which cooperates with the valve seat 56 and is pressed by a valve spring 54 against the valve seat 56. In the valve chamber 48 open the inlet 22 and the outflow 26. The inlet 22 ends, for example, in the cover 44, the outflow 26, for example, in the Side wall below the upper edge of the valve head 46 and the valve closure 50. Both the inlet 22 and the Abströmablauf protrude laterally from the top 30 from.

Wie in der Fig. 3 auch zu erkennen ist, kann der Zulauf 22 eine größere Querschnittsfläche als der Abströmablauf 26 aufweisen. Mit den verschiedenen Querschnittsflächen kann eingestellt werden, wie schnell Kraftstoff im geöffneten und geschlossenen Zustand des Druckregelventils 21 durch die Ventilkammer 48 strömt.Like in the Fig. 3 can also be seen, the inlet 22 may have a larger cross-sectional area than the outflow 26. With the different cross-sectional areas can be adjusted how fast fuel in the open and closed state of the pressure control valve 21 flows through the valve chamber 48.

Das Gehäuse 34 ist aus zwei topfförmigen Bestandteilen 52, 54 gefertigt, die über den gefalzten Rand 36 miteinander verbunden sind. Der Ablauf 24 des Druckregelventils 21 ist im Boden des unteren Bestandteils 54 ausgebildet.The housing 34 is made of two cup-shaped components 52, 54, which are interconnected via the folded edge 36. The drain 24 of the pressure regulating valve 21 is formed in the bottom of the lower component 54.

Die Fig. 3 zeigt, dass der Zulauf 22 an der gleichen Seite wie der Abströmablauf 26 in die Ventilkammer 48 münden kann.The Fig. 3 shows that the inlet 22 can open on the same side as the outflow 26 into the valve chamber 48.

Im Gegensatz dazu zeigt die Fig. 4, dass der Zulauf an einer dem Abströmablauf 26 gegenüberliegenden Seite in die Ventilkammer 48 münden kann. Dies kann das Überströmen der Funktionselemente des Ventilverschlusses 50 weiter begünstigen. Daneben kann der Abströmablauf 26 auch oberhalb des Ventilverschlusses 50 oder im Bereich des Ventilverschlusses 50 in die Ventilkammer 48 münden.In contrast, the shows Fig. 4 in that the inlet can open into the valve chamber 48 at a side opposite the outflow outlet 26. This can further promote the overflow of the functional elements of the valve closure 50. In addition, the outflow 26 may also open above the valve closure 50 or in the region of the valve closure 50 in the valve chamber 48.

Wie in der Fig. 4 beispielhaft dargestellt ist, kann das Druckregelventil 21 ein Membranventil sein. Im Gehäuse 34, das auch den Ventilkopf 46 bereitstellt, ist eine elastische Membran 52 aufgenommen, die zusammen mit der Feder 54 das Ventilelement 55 gegen den Ventilsitz 56 drückt, um das Druckregelventil 21 im geschlossenen Zustand zu halten. Kraftstoff aus der Ventilkammer 48 kann durch eine Öffnung 58 in das Druckregelventil 21 einströmen und bei entsprechend großem Druck, das Ventilelement 55 gegen die Kraft der Membran 52 und der Feder 54 von dem Ventilsitz 56 wegdrücken und Kraftstoff aus der Ventilkammer 48 kann durch das Gehäuse 34 zum Ablauf 24 strömen. Der Bereich des Ablaufs 24, auf dem das Ventilelement 58 abgestützt ist, ist dabei federnd ausgeführt, so dass sich das Ventilelement 58 vom Ventilsitz weg bewegen kann.Like in the Fig. 4 is exemplified, the pressure control valve 21 may be a diaphragm valve. In the housing 34, which also provides the valve head 46, a resilient diaphragm 52 is received, which presses together with the spring 54, the valve member 55 against the valve seat 56 to hold the pressure regulating valve 21 in the closed state. Fuel from the valve chamber 48 can flow through an opening 58 in the pressure control valve 21 and push the valve member 55 against the force of the diaphragm 52 and the spring 54 from the valve seat 56 and at sufficiently high pressure, and fuel from the valve chamber 48 through the housing 34th flow to drain 24. The region of the outlet 24, on which the valve element 58 is supported, is designed to be resilient, so that the valve element 58 can move away from the valve seat.

Der Ventilkopf 46 wird von einem Ringelement 60 an der Innenwandung der Ventilkammer 48 abgestützt, das einen im Wesentlichen L-förmigen Querschnittaufweist. Zwischen der Innenwandung der Ventilkammer 48 und einer Außenwandung des Ventilkopfs 46 ist ein O-Ring 62 angeordnet, der die Ventilkammer 48 gegenüber der Umgebung abdichtet.The valve head 46 is supported by a ring member 60 on the inner wall of the valve chamber 48, which has a substantially L-shaped cross-section. Between the inner wall of the valve chamber 48 and an outer wall of the valve head 46, an O-ring 62 is arranged, which seals the valve chamber 48 from the environment.

Ergänzend ist darauf hinzuweisen, dass "umfassend" keine anderen Elemente oder Schritte ausschließt und "eine" oder "ein" keine Vielzahl ausschließt. Ferner sei darauf hingewiesen, dass Merkmale oder Schritte, die mit Verweis auf eines der obigen Ausführungsbeispiele beschrieben worden sind, auch in Kombination mit anderen Merkmalen oder Schritten anderer oben beschriebener Ausführungsbeispiele verwendet werden können. Bezugszeichen in den Ansprüchen sind nicht als Einschränkung anzusehen.In addition, it should be noted that "encompassing" does not exclude other elements or steps, and "a" or "an" does not exclude a multitude. It should also be appreciated that features or steps described with reference to any of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims are not to be considered as limiting.

Claims (7)

  1. Fuel delivery system (10) for arrangement in a fuel tank (12) of a vehicle, the fuel delivery system (10) comprising:
    - a delivery pump (14) for delivering fuel into a delivery line (16);
    - a valve arrangement (20) in the delivery line (16), wherein the valve arrangement (20) comprise-s an attachment (30) which comprises an inlet (22), for connection to the delivery line (16) of the fuel delivery system (10), and a valve chamber (48), which is connected to the inlet (22); wherein the valve arrangement furthermore comprises a pressure regulating valve (21), and a valve closure (50) of the pressure regulating valve (21) is arranged in the valve chamber (48); wherein the valve arrangement (20) is designed such that, in the presence of a particular pressure in the valve chamber (48), the valve closure (50) opens and fuel flows from the valve chamber (48) into an outlet (24) of the pressure regulating valve (21) in order to lower the pressure in the valve chamber (48); wherein the attachment (30) comprises an outflow outlet (26) which is connected to the valve chamber (48), such that fuel flows around the valve closure (50) even when the pressure regulating valve (21) is closed,
    characterized in that
    the inlet (22) and the outflow outlet (26) of the attachment (30) form a delivery path (27) parallel to the delivery line (16).
  2. Fuel delivery system according to one of the preceding claims,
    wherein the valve chamber (48) is of pot-shaped design and covers a valve head (46) of the pressure regulating valve (21).
  3. Fuel delivery system according to Claim 2, wherein the valve head (46) is supported with a ringshaped element (60) in the valve chamber (48); and/or
    wherein an O-ring (62) for sealing purposes is arranged between the valve head (46) and the valve chamber (48).
  4. Fuel delivery system according to one of the preceding claims,
    wherein the inlet (22) opens into the valve chamber (48) opposite the valve closure (50).
  5. Fuel delivery system according to one of the preceding claims,
    wherein the outflow outlet (26) is connected to the delivery line (16).
  6. Fuel delivery system according to one of the preceding claims,
    wherein the inlet (22) has a larger cross-sectional area than the outflow outlet (26).
  7. Fuel delivery system according to Claim 1,
    wherein the parallel delivery path (27) has, at least in sections, a smaller cross-sectional area than the delivery line (16).
EP14190660.2A 2013-11-12 2014-10-28 Fuel delivery system with valve assembly Active EP2878805B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310223010 DE102013223010A1 (en) 2013-11-12 2013-11-12 Valve arrangement for fuel delivery system

Publications (2)

Publication Number Publication Date
EP2878805A1 EP2878805A1 (en) 2015-06-03
EP2878805B1 true EP2878805B1 (en) 2018-07-25

Family

ID=51830225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14190660.2A Active EP2878805B1 (en) 2013-11-12 2014-10-28 Fuel delivery system with valve assembly

Country Status (2)

Country Link
EP (1) EP2878805B1 (en)
DE (1) DE102013223010A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618647A1 (en) * 1996-05-09 1997-11-13 Bosch Gmbh Robert Device for supplying fuel to IC engine
US5873349A (en) * 1997-03-07 1999-02-23 Walbro Corporation Fuel pressure regulator
AT7374U1 (en) * 2003-09-30 2005-02-25 Tesma Motoren Getriebetechnik FUEL RETURN VALVE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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DE102013223010A1 (en) 2015-05-13

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