DE102009058784A1 - High-pressure pump for use in fuel-injection system of internal-combustion engine of motor vehicle, has damping element arranged at upstream of pressure chamber inlet valve, where damping element is designed as line with wall section - Google Patents
High-pressure pump for use in fuel-injection system of internal-combustion engine of motor vehicle, has damping element arranged at upstream of pressure chamber inlet valve, where damping element is designed as line with wall section Download PDFInfo
- Publication number
- DE102009058784A1 DE102009058784A1 DE200910058784 DE102009058784A DE102009058784A1 DE 102009058784 A1 DE102009058784 A1 DE 102009058784A1 DE 200910058784 DE200910058784 DE 200910058784 DE 102009058784 A DE102009058784 A DE 102009058784A DE 102009058784 A1 DE102009058784 A1 DE 102009058784A1
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- Prior art keywords
- damping element
- fuel
- pressure chamber
- pump
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
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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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Die Erfindung betrifft eine Hochdruckpumpe und eine Einspritzanlage für eine Brennkraftmaschine.The invention relates to a high-pressure pump and an injection system for an internal combustion engine.
Zum Einspritzen von Kraftstoff in Brennräume einer Brennkraftmaschine, kommen Einspritzanlagen zum Einsatz, die in den letzten Jahren immer mehr als so genannte „Common-Rail”-Anlagen ausgeführt sind. Bei diesen werden die in den Brennräumen angeordneten Injektoren aus einem gemeinsamen Kraftstoffspeicher, dem Common-Rail, mit Kraftstoff versorgt. Der Kraftstoff kann im Kraftstoffspeicher unter einem Druck von circa 2000 bar vorliegen.For injecting fuel into the combustion chambers of an internal combustion engine, injection systems are used, which are increasingly designed in recent years as so-called "common rail" systems. In these, the injectors arranged in the combustion chambers are supplied with fuel from a common fuel reservoir, the common rail. The fuel can be present in the fuel reservoir under a pressure of approximately 2000 bar.
Einspritzanlagen für Brennkraftmaschinen weisen üblicherweise Hochdruckpumpen auf, mittels derer Kraftstoff zum Einbringen in Brennräume der Brennkraftmaschine gefördert wird.Injection systems for internal combustion engines usually have high-pressure pumps, by means of which fuel is conveyed for introduction into combustion chambers of the internal combustion engine.
Einspritzanlagen für Brennkraftmaschinen stellen hohe Anforderungen an die Genauigkeit des zur Einspritzung des Kraftstoffs in die Brennräume der Brennkraftmaschine erforderlichen Einspritzdrucks. Dies ist besonders wichtig, da immer strengere Gesetzesvorschriften bezüglich der zulässigen Schadstoffemissionen von Brennkraftmaschinen, die in Kraftfahrzeugen angeordnet sind, erlassen werden. Diese machen es erforderlich, diverse Maßnahmen vorzunehmen, durch welche die Schadstoffemissionen gesenkt werden. Dabei ist es vorteilhaft für die Senkung der Schadstoffemissionen, wenn der Kraftstoff sehr präzise in den Zylinder eingespritzt werden kann.Injection systems for internal combustion engines place high demands on the accuracy of the injection pressure required for injecting the fuel into the combustion chambers of the internal combustion engine. This is particularly important as more and more stringent legislation is enacted regarding permissible pollutant emissions from internal combustion engines located in motor vehicles. These make it necessary to carry out various measures by which the pollutant emissions are reduced. It is advantageous for the reduction of pollutant emissions, when the fuel can be injected very precisely into the cylinder.
Die Aufgabe der Erfindung ist es, eine Hochdruckpumpe und eine Einspritzanlage für eine Brennkraftmaschine zu schaffen, durch die ein Betrieb der Brennkraftmaschine mit sehr geringen Schadstoffemissionen und ein einfacher Aufbau der Einspritzanlage ermöglicht werden.The object of the invention is to provide a high-pressure pump and an injection system for an internal combustion engine, by which operation of the internal combustion engine with very low pollutant emissions and a simple structure of the injection system are made possible.
Die Aufgabe wird gelöst durch die Merkmale der unabhängigen Patentansprüche. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.The object is solved by the features of the independent claims. Advantageous embodiments of the invention are characterized in the subclaims.
Gemäß eines ersten Aspekts zeichnet sich die Erfindung aus durch eine Hochdruckpumpe zur Förderung eines Fluids, die aufweist einen Zylinderkörper mit einer in diesem angeordneten Druckkammer, in der das Fluid unter Druck setzbar ist, ein stromaufwärts der Druckkammer angeordnetes Druckkammereinlassventil, und ein stromaufwärts des Druckkammereinlassventils angeordnetes Dämpfungselement. Das Dämpfungselement ist als rohr- oder schlauchförmige Fluidleitung mit mindestens einem elastischen Wandabschnitt ausgebildet.According to a first aspect, the invention is characterized by a high pressure pump for delivering a fluid comprising a cylinder body having a pressure chamber disposed therein in which the fluid is pressurizable, a pressure chamber inlet valve disposed upstream of the pressure chamber, and a pressure chamber inlet valve disposed upstream of the pressure chamber inlet valve damping element. The damping element is designed as a tubular or tubular fluid line with at least one elastic wall portion.
Das Druckkammereinlassventil ist ausgebildet zur Zufuhr von Fluid in die Druckkammer. Das Dämpfungselement ist ausgebildet zur Dämpfung von Druckschwankungen des Fluids, die bei der Fluidförderung von der Hochdruckpumpe hervorgerufen werden. Das Dämpfungselement ist ausgebildet zur Dämpfung von durch ein Öffnen und Schließen des Druckkammereinlassventils verursachten Druckschwankungen der Hochdruckpumpe.The pressure chamber inlet valve is designed to supply fluid into the pressure chamber. The damping element is designed for damping pressure fluctuations of the fluid, which are caused by the high pressure pump in the fluid delivery. The damping element is designed for damping pressure fluctuations of the high-pressure pump caused by opening and closing of the pressure chamber inlet valve.
Dies ist vorteilhaft, da so in einfacher und effizienter Weise eine Dämpfung von Druckschwankungen des Fluids möglich ist, die bei der Fluidförderung von der Hochdruckpumpe hervorgerufen werden. So können die Druckschwankungen des Fluids sowohl in axialer als auch in radialer Richtung der rohr- oder schlauchförmigen Fluidleitung kompensiert werden. Darüber hinaus ist ein sehr einfacher Aufbau des Dämpfungselements möglich. Des Weiteren ermöglicht ein derartiges Dämpfungselement eine sehr kompakte Bauform. Damit kann das Dämpfungselement sehr kostengünstig ausgebildet sein.This is advantageous, since in a simple and efficient manner, an attenuation of pressure fluctuations of the fluid is possible, which are caused by the high pressure pump in the fluid delivery. Thus, the pressure fluctuations of the fluid can be compensated both in the axial and in the radial direction of the tubular or tubular fluid line. In addition, a very simple construction of the damping element is possible. Furthermore, such a damping element allows a very compact design. Thus, the damping element can be designed very inexpensive.
In einer vorteilhaften Ausgestaltung ist die Fluidleitung als Faltenbalg ausgebildet. Damit ist es möglich, Druckschwankungen des Fluids in sehr effizienter Weise zu dämpfen.In an advantageous embodiment, the fluid line is designed as a bellows. This makes it possible to damp pressure fluctuations of the fluid in a very efficient manner.
In einer weiteren vorteilhaften Ausgestaltung weist die Fluidleitung mindestens zwei erste Kanalabschnitte mit ersten Durchmessern und einen zwischen den ersten Kanalabschnitten angeordneten zweiten Kanalabschnitt mit einem zweiten Durchmesser auf. Der zweite Durchmesser ist größer als die ersten Durchmesser. Damit ist bei einem einfachen Aufbau des Dämpfungselements eine gute Dämpfung der Druckschwankungen des Fluids möglich.In a further advantageous embodiment, the fluid line has at least two first channel sections with first diameters and a second channel section arranged between the first channel sections with a second diameter. The second diameter is larger than the first diameter. For a good damping of the pressure fluctuations of the fluid is possible with a simple construction of the damping element.
In einer weiteren vorteilhaften Ausgestaltung besteht der Wandabschnitt aus einem Metall oder weist ein Metall auf. Dies hat den Vorteil, dass das Dämpfungselement sehr robust ausgebildet sein kann und dabei gute Dämpfungseigenschaften bezüglich von Druckschwankungen des Fluids ermöglicht.In a further advantageous embodiment, the wall section consists of a metal or has a metal. This has the advantage that the damping element can be made very robust while allowing good damping properties with respect to pressure fluctuations of the fluid.
In einer weiteren vorteilhaften Ausgestaltung besteht der Wandabschnitt aus einem elastischen Kunststoff oder weist einen elastischen Kunststoff auf. Dies hat den Vorteil, dass das Dämpfungselement sehr gute Dämpfungseigenschaften bezüglich von Druckschwankungen des Fluids haben kann. Darüber hinaus kann durch eine entsprechende Auswahl eines ausgewählten elastischen Kunststoffs eine gute Anpassung an die gewünschten Dämpfungseigenschaften des Dämpfungselements einerseits und eine gute mechanische Stabilität des Dämpfungselements andererseits ermöglicht werden. Des Weiteren können die Materialien für den Wandabschnitt sehr kostengünstig sein.In a further advantageous embodiment, the wall section consists of an elastic plastic or has an elastic plastic. This has the advantage that the damping element can have very good damping properties with respect to pressure fluctuations of the fluid. In addition, by a suitable selection of a selected elastic plastic, a good adaptation to the desired damping properties of the damping element on the one hand and a good mechanical stability of the damping element on the other hand be made possible. Of Furthermore, the materials for the wall section can be very inexpensive.
In einer weiteren vorteilhaften Ausgestaltung weist die Fluidleitung einen Kanal auf, in dem Blenden angeordnet sind. Dies hat den Vorteil, dass neben dem elastischen Wandabschnitt noch weitere Teile des Dämpfungselements zur Dämpfung von Druckschwankungen des Fluids beitragen können.In a further advantageous embodiment, the fluid line has a channel in which shutters are arranged. This has the advantage that, in addition to the elastic wall section, further parts of the damping element can contribute to the damping of pressure fluctuations of the fluid.
Gemäß eines zweiten Aspekts zeichnet sich die Erfindung aus durch eine Einspritzanlage für eine Brennkraftmaschine, mit einer Vorförderpumpe zur Förderung von Kraftstoff aus einem Kraftstofftank, und einer der Vorförderpumpe stromabwärts nachgeordneten Hochdruckpumpe. Die Hochdruckpumpe ist ausgebildet und angeordnet zur Förderung des Kraftstoffs in einen Kraftstoffspeicher.According to a second aspect, the invention is characterized by an injection system for an internal combustion engine, with a prefeed pump for conveying fuel from a fuel tank, and a high-pressure pump downstream of the prefeed pump downstream. The high-pressure pump is designed and arranged for conveying the fuel into a fuel reservoir.
Vorteilhafte Ausgestaltungen der Erfindung sind nachfolgend anhand der schematischen Zeichnungen näher erläutert. Es zeigen:Advantageous embodiments of the invention are explained below with reference to the schematic drawings. Show it:
Elemente gleicher Konstruktion oder Funktion sind figurenübergreifend mit den gleichen Bezugszeichen gekennzeichnet.Elements of the same construction or function are identified across the figures with the same reference numerals.
Die in der
Der Kraftstoffspeicher
Zum Schutz der Pumpe
Die Hochdruckpumpe
Wie in
Wie in den
Die rohr- oder schlauchförmige Fluidleitung
In der in
In der in
In der in
Im Folgenden wird die Funktion der Einspritzanlage für die Brennkraftmaschine und der Hochdruckpumpe
Die Vorförderpumpe
The
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910058784 DE102009058784A1 (en) | 2009-12-18 | 2009-12-18 | High-pressure pump for use in fuel-injection system of internal-combustion engine of motor vehicle, has damping element arranged at upstream of pressure chamber inlet valve, where damping element is designed as line with wall section |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE200910058784 DE102009058784A1 (en) | 2009-12-18 | 2009-12-18 | High-pressure pump for use in fuel-injection system of internal-combustion engine of motor vehicle, has damping element arranged at upstream of pressure chamber inlet valve, where damping element is designed as line with wall section |
Publications (1)
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DE102009058784A1 true DE102009058784A1 (en) | 2011-06-22 |
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DE200910058784 Ceased DE102009058784A1 (en) | 2009-12-18 | 2009-12-18 | High-pressure pump for use in fuel-injection system of internal-combustion engine of motor vehicle, has damping element arranged at upstream of pressure chamber inlet valve, where damping element is designed as line with wall section |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2998335A1 (en) * | 2012-11-16 | 2014-05-23 | Renault Sa | Noise suppression device for suction element of fuel circuit in vehicle i.e. car, has tubular control element including ends fixed on fuel supply line of suction element, where control element is fixed in derivation compared to supply line |
DE102015219769A1 (en) * | 2015-10-13 | 2016-10-06 | Continental Automotive Gmbh | Low-pressure damper and high-pressure fuel pump |
IT201600132431A1 (en) * | 2016-12-29 | 2018-06-29 | Bosch Gmbh Robert | PUMPING GROUP FOR FOOD FUEL, PREFERIBLY GASOIL, FROM A CONTAINMENT TANK TO AN INTERNAL COMBUSTION ENGINE |
DE102019211731A1 (en) * | 2019-08-05 | 2021-02-11 | Vitesco Technologies GmbH | Fuel supply device with hydraulic damper device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3473565A (en) * | 1966-05-25 | 1969-10-21 | Josam Mfg Co | Shock absorber for liquid flow lines |
DE4241374A1 (en) * | 1992-12-09 | 1994-06-16 | Kloeckner Humboldt Deutz Ag | Fuel supply system for IC engine - has throttle nozzle in fuel line located between fuel filter and injection pump |
JP2002106438A (en) * | 2000-10-02 | 2002-04-10 | Usui Internatl Ind Co Ltd | Pulsation absorbing system of fuel piping system |
DE10156732A1 (en) * | 2001-11-19 | 2003-06-05 | Bosch Gmbh Robert | High pressure fuel pump for IC engine, has pressure step damping device with line section whose volume increases when internal pressure is much greater than fuel compressibility in line section |
JP2004124898A (en) * | 2002-10-07 | 2004-04-22 | Bosch Automotive Systems Corp | Dme fuel supplying device for diesel engine, and pulsation absorbing pipe |
-
2009
- 2009-12-18 DE DE200910058784 patent/DE102009058784A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3473565A (en) * | 1966-05-25 | 1969-10-21 | Josam Mfg Co | Shock absorber for liquid flow lines |
DE4241374A1 (en) * | 1992-12-09 | 1994-06-16 | Kloeckner Humboldt Deutz Ag | Fuel supply system for IC engine - has throttle nozzle in fuel line located between fuel filter and injection pump |
JP2002106438A (en) * | 2000-10-02 | 2002-04-10 | Usui Internatl Ind Co Ltd | Pulsation absorbing system of fuel piping system |
DE10156732A1 (en) * | 2001-11-19 | 2003-06-05 | Bosch Gmbh Robert | High pressure fuel pump for IC engine, has pressure step damping device with line section whose volume increases when internal pressure is much greater than fuel compressibility in line section |
JP2004124898A (en) * | 2002-10-07 | 2004-04-22 | Bosch Automotive Systems Corp | Dme fuel supplying device for diesel engine, and pulsation absorbing pipe |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2998335A1 (en) * | 2012-11-16 | 2014-05-23 | Renault Sa | Noise suppression device for suction element of fuel circuit in vehicle i.e. car, has tubular control element including ends fixed on fuel supply line of suction element, where control element is fixed in derivation compared to supply line |
DE102015219769A1 (en) * | 2015-10-13 | 2016-10-06 | Continental Automotive Gmbh | Low-pressure damper and high-pressure fuel pump |
IT201600132431A1 (en) * | 2016-12-29 | 2018-06-29 | Bosch Gmbh Robert | PUMPING GROUP FOR FOOD FUEL, PREFERIBLY GASOIL, FROM A CONTAINMENT TANK TO AN INTERNAL COMBUSTION ENGINE |
DE102019211731A1 (en) * | 2019-08-05 | 2021-02-11 | Vitesco Technologies GmbH | Fuel supply device with hydraulic damper device |
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Effective date: 20120922 |