DE102016219486A1 - Throttling element, in particular for a high pressure pump, in particular a low pressure circuit of a fuel injection system - Google Patents
Throttling element, in particular for a high pressure pump, in particular a low pressure circuit of a fuel injection system Download PDFInfo
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- DE102016219486A1 DE102016219486A1 DE102016219486.0A DE102016219486A DE102016219486A1 DE 102016219486 A1 DE102016219486 A1 DE 102016219486A1 DE 102016219486 A DE102016219486 A DE 102016219486A DE 102016219486 A1 DE102016219486 A1 DE 102016219486A1
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- injection system
- throttle element
- pressure pump
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
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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
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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
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/007—Venting means
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/447—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/464—Inlet valves of the check valve type
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/48—Assembling; Disassembling; Replacing
- F02M59/485—Means for fixing delivery valve casing and barrel to each other or to pump casing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/188—Spherical or partly spherical shaped valve member ends
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
Abstract
Die Erfindung betrifft ein Drosselelement (1) für einen Niederdruckkreis eines Kraftstoffeinspritzsystems, insbesondere eines Common-Rail-Einspritzsystems, umfassend einen Körper (2) mit einer als Axialbohrung ausgeführten Bohrung (3), in welche eine als Radialbohrung ausgebildete Drosselbohrung (4) mündet. Erfindungsgemäß ist in das Drosselelement (1) ein Rückschlagventil (5) integriert, das mindestens einen Ventilsitz (6, 7) und ein mit dem Ventilsitz (6, 7) zusammenwirkendes Schließelement (8) umfasst. Die Erfindung betrifft ferner eine Hochdruckpumpe sowie einen Niederdruckkreis für ein Kraftstoffeinspritzsystem, insbesondere für ein Common-Rail-Einspritzsystem, mit einem solchen Drosselelement (1).The invention relates to a throttle element (1) for a low pressure circuit of a fuel injection system, in particular a common rail injection system, comprising a body (2) with a bore (3) designed as an axial bore into which a throttle bore (4) designed as a radial bore opens. According to the invention, a non-return valve (5) is integrated into the throttle element (1) and comprises at least one valve seat (6, 7) and a closing element (8) cooperating with the valve seat (6, 7). The invention further relates to a high pressure pump and a low pressure circuit for a fuel injection system, in particular for a common rail injection system, with such a throttle element (1).
Description
Die Erfindung betrifft ein Drosselelement, insbesondere für einen Niederdruckkreis eines Kraftstoffeinspritzsystems, insbesondere eines Common-Rail-Einspritzsystems, mit den Merkmalen des Oberbegriffs des Anspruchs 1. Ferner betrifft die Erfindung eine Hochdruckpumpe und einen Niederdruckkreis mit einem solchen Drosselelement, insbesondere zur Ausbildung einer Nullförderdrossel.The invention relates to a throttle element, in particular for a low pressure circuit of a fuel injection system, in particular a common rail injection system, with the features of the preamble of claim 1. Furthermore, the invention relates to a high-pressure pump and a low-pressure circuit with such a throttle element, in particular for forming a zero-feed throttle.
Stand der TechnikState of the art
Aus dem Stand der Technik sind bereits Drosselelemente bekannt, die in einen Kraftstoffkanal eines Niederdruckkreislaufs eines Kraftstoffeinspritzsystems einsetzbar sind und der Ausbildung einer Nullförderdrossel dienen. Ein solches Drosselelement geht beispielhaft aus der
Das in der
Ausgehend von dem vorstehend genannten Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein Drosselelement insbesondere für einen Niederdruckkreis eines Kraftstoffeinspritzsystems anzugeben, das eine hohe Funktionssicherheit besitzt und zudem einfach und kostengünstig herstellbar ist.Based on the above-mentioned prior art, the present invention seeks to provide a throttle element in particular for a low-pressure circuit of a fuel injection system, which has a high reliability and is also easy and inexpensive to produce.
Die Aufgabe wird gelöst durch das Drosselelement mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben. Ferner werden eine Hochdruckpumpe und ein Niederdruckkreis mit einem solchen Drosselelement vorgeschlagen.The object is achieved by the throttle element with the features of claim 1. Advantageous developments of the invention are specified in the dependent claims. Furthermore, a high pressure pump and a low pressure circuit are proposed with such a throttle element.
Offenbarung der ErfindungDisclosure of the invention
Das vorzugsweise für einen Niederdruckkreis, insbesondere eines Kraftstoffeinspritzsystems, insbesondere eines Common-Rail-Einspritzsystems, vorgeschlagene Drosselelement umfasst einen vorzugsweise im Querschnitt kreisförmigen Körper mit einer als Axialbohrung ausgeführten Bohrung, in welche eine als Radialbohrung ausgebildete Drosselbohrung mündet. Die Bohrung ist insbesondere als eine zentrale Bohrung entlang der Längsachse eines im Wesentlichen zylindrischen Körpers ausgebildet. Erfindungsgemäß ist in das Drosselelement ein Rückschlagventil integriert, das mindestens einen Ventilsitz und ein mit dem Ventilsitz zusammenwirkendes Schließelement umfasst. Das integrierte Rückschlagventil stellt sicher, dass das Drosselelement in nur einer Richtung durchflossen wird, wenn es als Nullförderdrossel in einen Niederdruckkreis eines Kraftstoffeinspritzsystems eingesetzt wird. Auf diese Weise wird ein Partikeleintrag durch rückströmenden Kraftstoff sicher verhindert. Eine zusätzliche Filtereinrichtung und/oder ein zusätzliches Rückschlagventil in einer Rücklaufleitung des Niederdruckkreises ist bzw. sind somit entbehrlich.The preferably for a low-pressure circuit, in particular a fuel injection system, in particular a common rail injection system, proposed throttle element comprises a preferably circular in cross-section body with a bore designed as an axial bore into which a designed as a radial bore throttle bore opens. The bore is in particular formed as a central bore along the longitudinal axis of a substantially cylindrical body. According to the invention, a check valve is integrated into the throttle element, which comprises at least one valve seat and a closing element cooperating with the valve seat. The integrated check valve ensures that the throttle element is traversed in one direction only when it is used as a zero delivery throttle in a low pressure circuit of a fuel injection system. In this way, a particle entry is reliably prevented by flowing back fuel. An additional filter device and / or an additional check valve in a return line of the low pressure circuit is or are therefore unnecessary.
Durch die vorgeschlagene Funktionsintegration reduziert sich die Anzahl der erforderlichen Bauteile. In der Folge sinken die Herstellungs- und Montagekosten. Ferner verringert sich der Bauraumbedarf. Darüber hinaus weist das Drosselelement eine hohe Funktionssicherheit auf, wenn das Rückschlagventil als Doppelsitzventil ausgebildet ist. Denn dann kann die Verlustmenge bei Hochdruckförderung auf ein Minimum reduziert werden. Zugleich steigt die Effizienz der Hochdruckpumpe.The proposed functional integration reduces the number of required components. As a result, the manufacturing and assembly costs are reduced. Furthermore, the space requirement is reduced. In addition, the throttle element has a high reliability when the check valve is designed as a double seat valve. Because then the loss amount can be reduced at high pressure pumping to a minimum. At the same time, the efficiency of the high pressure pump increases.
Bevorzugt ist das Schließelement in Richtung eines ersten Ventilsitzes von der Federkraft einer Feder beaufschlagt. Über die Federkraft der Feder ist der Öffnungsdruck des Rückschlagventils vorgebbar. Vorzugsweise öffnet das Rückschlagventil entgegen der Federkraft der Feder, wenn der Druck im Zulaufbereich der Hochdruckpumpe über einen vorgegebenen Grenzwert steigt.Preferably, the closing element is acted upon in the direction of a first valve seat by the spring force of a spring. About the spring force of the spring, the opening pressure of the check valve is specified. Preferably, the check valve opens against the spring force of the spring when the pressure in the inlet region of the high-pressure pump rises above a predetermined limit.
Vorteilhafterweise wird der erste Ventilsitz durch einen Absatz des Körpers des Drosselelements innerhalb der Bohrung ausgebildet. Die Bohrung ist hierzu bevorzugt als Stufenbohrung ausgeführt. Alternativ oder ergänzend kann die Bohrung zumindest abschnittsweise konisch verlaufend ausgebildet sein, um beispielsweise einen kegelförmigen Ventilsitz auszubilden.Advantageously, the first valve seat is formed by a shoulder of the body of the throttle element within the bore. For this purpose, the bore is preferably designed as a stepped bore. Alternatively or additionally, the bore may be at least partially conical, for example, to form a conical valve seat.
Das mit dem mindestens einen Ventilsitz zusammenwirkende Schließelement ist vorzugsweise kugelförmig ausgebildet, so dass der Dichtsitz über eine kreisförmige Dichtlinie bewirkt wird. Auf diese Weise kann eine hohe Dichtkraft erzielt werden. Zugleich ist eine Selbstzentrierung des Schließelements in Bezug auf den Ventilsitz sichergestellt.The cooperating with the at least one valve seat closing element is preferably spherical, so that the sealing seat is effected via a circular sealing line. In this way, a high sealing force can be achieved. At the same time, self-centering of the closing element with respect to the valve seat is ensured.
Des Weiteren bevorzugt wirkt das Schließelement mit einem weiteren Ventilsitz zusammen, um die Verlustmenge bei Hochdruckförderung zu minimieren bzw. das Entstehen einer Verlustmenge zu verhindern. Der weitere Ventilsitz liegt dem ersten Ventilsitz gegenüber, so dass das Schließelement zur Abführung einer Leckagemenge eine Lage zwischen den beiden Ventilsitzen einnehmen kann. Bei wechselnden Druckverhältnissen kann das Schließelement zur Anlage am ersten oder am zweiten Ventilsitz gelangen, um entweder ein Rückströmen von Kraftstoff in den Zulaufbereich oder ein Abströmen von Kraftstoff aus dem Zulaufbereich zu verhindern.Furthermore, the closing element preferably cooperates with a further valve seat in order to minimize the loss quantity in the case of high-pressure delivery or to prevent the occurrence of a loss quantity. The further valve seat is located opposite the first valve seat, so that the closing element can assume a position between the two valve seats in order to discharge a leakage quantity. With changing pressure conditions, the closing element can come to rest on the first or on the second valve seat in order to prevent either a return flow of fuel into the inlet region or an outflow of fuel from the inlet region.
Gemäß einer bevorzugten Ausführungsform der Erfindung wird der weitere Ventilsitz durch eine Hülse gebildet, die in die Bohrung des Körpers des Drosselelements eingesetzt, insbesondere eingepresst ist. Auf diese Weise lässt sich der weitere Ventilsitz einfach und kostengünstig realisieren.According to a preferred embodiment of the invention, the further valve seat is formed by a sleeve which is inserted into the bore of the body of the throttle element, in particular pressed. In this way, the other valve seat can be realized easily and inexpensively.
Darüber hinaus wird vorgeschlagen, dass die Hülse zur Ausbildung des weiteren Ventilsitzes einen Ringbund aufweist. Der Ringbund kann zur Abstützung der Feder genutzt werden, über deren Federkraft das Schließelement in Richtung des ersten Ventilsitzes vorgespannt ist. Ist die Hülse in die Bohrung des Körpers eingepresst, kann über die Einpresstiefe die Federkraft der Feder eingestellt werden.In addition, it is proposed that the sleeve for forming the further valve seat has a collar. The annular collar can be used to support the spring, via whose spring force the closing element is biased in the direction of the first valve seat. If the sleeve is pressed into the bore of the body, the spring force of the spring can be adjusted via the press-in depth.
Damit die Drosselbohrung des Drosselelements nicht umgangen werden kann, wird vorgeschlagen, dass die im Körper ausgebildete Bohrung, in welche die Drosselbohrung mündet, als Sacklochbohrung ausgeführt ist. Das heißt, dass der Körper des Drosselelements in zumindest einem Abschnitt geschlossen bzw. massiv ausgeführt ist. Dieser Abschnitt ist der Drosselbohrung vorgelagert, so dass er zugleich zur Begrenzung eines Ringspalts eingesetzt werden kann, der eine der Drosselbohrung vorgelagerten Spaltfilter ausbildet.Thus, the throttle bore of the throttle element can not be circumvented, it is proposed that the bore formed in the body, in which the throttle bore opens, is designed as a blind hole. This means that the body of the throttle element is closed or solid in at least one section. This section is upstream of the throttle bore, so that it can be used at the same time to limit an annular gap, which forms a throttle bore upstream gap filter.
Die Drosselbohrung selbst ist vorzugsweise im Bereich einer außenumfangseitigen Einschnürung des Körpers angeordnet. Die Einschnürung führt zur Ausbildung eines der Drosselbohrung vorgelagerten Ringraums, in dem sich die abzuführende Leckagemenge sammeln kann.The throttle bore itself is preferably arranged in the region of an outer peripheral side constriction of the body. The constriction leads to the formation of an annular space upstream of the throttle bore, in which the amount of leakage can be collected.
Da die Vorteile des erfindungsgemäßen Drosselelements insbesondere bei Einsatz in einem Niederdruckkreis eines Kraftstoffeinspritzsystems zum Tragen kommen, wird ferner ein Niederdruckkreis für ein Kraftstoffeinspritzsystem, insbesondere für ein Common-Rail-Einspritzsystem, mit einem solchen Drosselelement zur Ausbildung einer Nullförderdrossel vorgeschlagen. Das Drosselelement ist hierzu in einen Kraftstoffkanal des Niederdruckkreises eingesetzt, insbesondere eingepresst. Die Pressverbindung lässt sich besonders einfach und kostengünstig realisieren, da kein Gewinde geschnitten werden muss.Since the advantages of the throttle element according to the invention come into play, in particular when used in a low pressure circuit of a fuel injection system, a low pressure circuit for a fuel injection system, in particular for a common rail injection system, is proposed with such a throttle element for forming a zero-feed throttle. The throttle element is used for this purpose in a fuel passage of the low-pressure circuit, in particular pressed. The press connection can be realized particularly simply and inexpensively, since no thread must be cut.
Bevorzugt ist der das Drosselelement aufnehmende Kraftstoffkanal in einem Gehäuseteil einer Hochdruckpumpe ausgebildet, und zwar in der Weise, dass der Kraftstoffkanal über das Drosselelement an einen Rücklauf des Niederdruckkreises anschließbar ist. Die über das Drosselelement in den Rücklauf abgeführte Leckagemenge bleibt somit dem System erhalten, wodurch die Effizienz des Systems weiter steigt.Preferably, the fuel passage receiving the throttle element is formed in a housing part of a high pressure pump, in such a way that the fuel passage is connectable via the throttle element to a return of the low pressure circuit. The amount of leakage discharged into the return via the throttle element thus remains with the system, which further increases the efficiency of the system.
Des Weiteren wird vorgeschlagen, dass der Körper des Drosselelements innerhalb des Kraftstoffkanals einen Ringraum begrenzt, der über die Drosselbohrung mit der Bohrung verbunden ist. Die Drosselbohrung wird in diesem Fall über den Ringraum angeströmt. Ist dieser als Ringspalt ausgebildet kann zugleich eine Filterfunktion realisiert werden.Furthermore, it is proposed that the body of the throttle element within the fuel channel defines an annular space which is connected via the throttle bore with the bore. The throttle bore is in this case flowed through the annulus. If this is designed as an annular gap can be realized at the same time a filter function.
Eine bevorzugte Ausführungsform der Erfindung wird nachfolgend anhand der beigefügten Zeichnungen näher erläutert. Diese zeigen:A preferred embodiment of the invention will be explained in more detail with reference to the accompanying drawings. These show:
Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings
Das Kraftstoffeinspritzsystem nach
Der Niederdruckkreis
Überschüssiger Kraftstoff, welcher durch die Zumesseinheit
Das in der
In einem mittleren Bereich weist der Körper
Um sicherzustellen, dass das Drosselelement
Um Kraftstoff aus dem Zulaufbereich in den Rücklauf
Bei weiter ansteigendem Druck im Zulaufbereich gelangt das Schließelement
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102009001564 A1 [0002, 0003] DE 102009001564 A1 [0002, 0003]
Claims (12)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016219486.0A DE102016219486A1 (en) | 2016-10-07 | 2016-10-07 | Throttling element, in particular for a high pressure pump, in particular a low pressure circuit of a fuel injection system |
KR1020197012506A KR20190057365A (en) | 2016-10-07 | 2017-09-22 | Particularly in the low-pressure circuit of the fuel injection system, the throttle element |
CN201780061768.1A CN109790807B (en) | 2016-10-07 | 2017-09-22 | Throttling element, high-pressure pump, low-pressure circuit of fuel injection system |
PCT/EP2017/073991 WO2018065235A1 (en) | 2016-10-07 | 2017-09-22 | Throttle element, in particular for a high-pressure pump, in particular of a low-pressure circuit of a fuel injection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016219486.0A DE102016219486A1 (en) | 2016-10-07 | 2016-10-07 | Throttling element, in particular for a high pressure pump, in particular a low pressure circuit of a fuel injection system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102016219486A1 true DE102016219486A1 (en) | 2018-04-12 |
Family
ID=59974410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102016219486.0A Pending DE102016219486A1 (en) | 2016-10-07 | 2016-10-07 | Throttling element, in particular for a high pressure pump, in particular a low pressure circuit of a fuel injection system |
Country Status (4)
Country | Link |
---|---|
KR (1) | KR20190057365A (en) |
CN (1) | CN109790807B (en) |
DE (1) | DE102016219486A1 (en) |
WO (1) | WO2018065235A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11339688B2 (en) | 2020-01-29 | 2022-05-24 | Borgwarner, Inc. | Variable camshaft timing valve assembly |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009001564A1 (en) | 2009-03-16 | 2010-09-23 | Robert Bosch Gmbh | Throttle element for low-pressure circuit of common rail system of motor vehicle, has filter element provided at section of throttle element, where section is provided upstream of throttle opening |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3731206A1 (en) * | 1987-09-17 | 1989-03-30 | Daimler Benz Ag | BLEEDING DEVICE FOR A FUEL SYSTEM OF INTERNAL COMBUSTION ENGINES |
DE19634899A1 (en) * | 1996-08-29 | 1998-03-05 | Bosch Gmbh Robert | Low pressure regulating valve for diesel internal combustion engines |
DE10063713A1 (en) * | 2000-12-20 | 2002-07-18 | Bosch Gmbh Robert | Device for measuring the injection quantity of injection systems and method for their production |
SE520210C2 (en) * | 2001-10-10 | 2003-06-10 | Volvo Lastvagnar Ab | Combination valve for a fuel system for an internal combustion engine and such a fuel system |
US20130340861A1 (en) * | 2012-06-20 | 2013-12-26 | Caterpillar Inc | Check valve of fuel system |
DE102013203141A1 (en) * | 2013-02-26 | 2014-08-28 | Robert Bosch Gmbh | High pressure pump for fuel injection system, particularly common-rail injection system, has housing part with suction valve, where suction valve comprises valve plate that is pressed in bore of housing part of high pressure pump |
DE102013212145A1 (en) * | 2013-06-25 | 2015-01-08 | Robert Bosch Gmbh | pump |
DE102013216889B4 (en) * | 2013-08-26 | 2016-08-11 | Robert Bosch Gmbh | Overflow valve for a fuel injection system and fuel injection system |
DE102013224387B4 (en) * | 2013-11-28 | 2019-11-28 | Robert Bosch Gmbh | Fuel injection system and method for operating a fuel injection system |
DE102013226649A1 (en) * | 2013-12-19 | 2015-06-25 | Robert Bosch Gmbh | Fuel supply device of a fuel injection system of an internal combustion engine and overflow valve to it |
DE102014217441A1 (en) * | 2014-09-01 | 2016-03-03 | Robert Bosch Gmbh | Electromagnetically actuated proportional valve |
-
2016
- 2016-10-07 DE DE102016219486.0A patent/DE102016219486A1/en active Pending
-
2017
- 2017-09-22 CN CN201780061768.1A patent/CN109790807B/en active Active
- 2017-09-22 KR KR1020197012506A patent/KR20190057365A/en unknown
- 2017-09-22 WO PCT/EP2017/073991 patent/WO2018065235A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009001564A1 (en) | 2009-03-16 | 2010-09-23 | Robert Bosch Gmbh | Throttle element for low-pressure circuit of common rail system of motor vehicle, has filter element provided at section of throttle element, where section is provided upstream of throttle opening |
Also Published As
Publication number | Publication date |
---|---|
CN109790807B (en) | 2021-07-06 |
CN109790807A (en) | 2019-05-21 |
WO2018065235A1 (en) | 2018-04-12 |
KR20190057365A (en) | 2019-05-28 |
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