DE2924796A1 - Damper for fuel injection pulsating flow - has evacuated resilient box inside chamber connected in injection circuit - Google Patents
Damper for fuel injection pulsating flow - has evacuated resilient box inside chamber connected in injection circuitInfo
- Publication number
- DE2924796A1 DE2924796A1 DE19792924796 DE2924796A DE2924796A1 DE 2924796 A1 DE2924796 A1 DE 2924796A1 DE 19792924796 DE19792924796 DE 19792924796 DE 2924796 A DE2924796 A DE 2924796A DE 2924796 A1 DE2924796 A1 DE 2924796A1
- Authority
- DE
- Germany
- Prior art keywords
- evacuated
- damper
- fuel injection
- box
- damping element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0041—Means for damping pressure pulsations
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
DämpfungselementDamping element
Stand der Technik Die Erfindung geht aus von einem Dämpfungselement nach der Gattung des Hauptanspruchs. Es ist schon ein Dämpfungselement bekannt, bei dem als nachgiebige Wandung zur Dämpfung einer Fluidströmung eine Membran dient.PRIOR ART The invention is based on a damping element according to the genre of the main claim. A damping element is already known, in which a membrane serves as a flexible wall to dampen a fluid flow.
Dabei ergibt sich jedoch der Nachteil, daß bei einer Zerstörung der Membran des Dämpfungselementes Fluid aus dem Dämpfergehäuse austritt und es dabei nicht nur zu einer Störung des Systems, in das das Dämpfungselement integriert ist, sondern bei einem giftigen oder explosiven Fluid auch zu einer Gefahr für die Umgebung kommen kann. Diese bekannten Dämpfungselemente finden z.B. in Kraftstoffeinspritzanlagen Verwendung, so daß bei zerstörter Dämpfermembran Kraftstoff aus dem Dämpfungselement austreten kann, mit der Folge von Motorbränden oder Explosionen.However, this has the disadvantage that if the destruction Membrane of the damping element fluid emerges from the damper housing and it thereby not only to a disruption of the system in which the damping element is integrated, but in the case of a poisonous or explosive fluid it also poses a danger to the environment can come. These known damping elements can be found in fuel injection systems, for example Use, so that if the damper membrane is destroyed, fuel from the damping element can escape, resulting in engine fires or explosions.
Vorteile der Erfindung Das erfindungsgemäße Dämpfungselement mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß bei dem auf einfache Art und Weise gefertigten Dämpfungselement sichergestellt ist, daß bei einer Beschädigung der nachgiebigen Wandung kein Fluid aus dem Dämpfungselement austreten kann.Advantages of the invention The damping element according to the invention with the characterizing features of the main claim has the Advantage that ensured in the damping element manufactured in a simple manner is that if the flexible wall is damaged, no fluid from the damping element can emerge.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Dämpfungselementes möglich.The measures listed in the subclaims are advantageous Developments and improvements of the damping element specified in the main claim possible.
Zeichnung Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert.Drawing An embodiment of the invention is shown in the drawing shown in simplified form and explained in more detail in the following description.
Beschreibung des Ausführungsbeispieles Das in der Zeichnung dargestellte Dämpfungselement weist ein aus Gehäuseteilen 1 und 2 gebildetes Dämpfergehäuse auf, wobei die Gehäuseteile 1 und 2 an ihrem Außenumfang bei 3 verbördelt sind, unter Verwendung mindestens eines Dichtelementes 4. Die durch die Gehäuseteile 1 und 2 umschlossene Dämpferkammer 5 steht über Anschlußstutzen 6 und 7 mit einem Fluiddrucksystem in Verbindung. So kann das Dämpfungselement beispielsweise in eine Kraftstoffeinspritzanlage integriert und der Anschlußstutzen 6 über eine Kraftstoffversorgungsleitung 8 mit der Druckseite einer pulsierend fördernden Kraftstofförderpumpe 9 verbunden sein, die Kraftstoff aus einem Kraftstoffbehälter 10 fördert. Von dem Anschlußstutzen 7 führt die Kraftstoffversorgungsleitung 8 dann weiter zu einer Kraftstoffzumeßeinheit 11, die einerseits einen gewissen Rückstrom des Kraftstoffes über eine Leitung 12 zum Kraftstoffbehälter 10 erlaubt und andererseits den über das Kraftstoffeinspritzventil 13 einzuspritzenden Kraftstoff bestimmt. In der Dämpferkammer 5 ist ein elastischer, allseitig umschlossener Hohlkörper 15 angeordnet, der beispielsweise mit einem Gas gefüllt oder evakuiert sein kann, so daß als elastischer Hohlkörper auch eine Barometerdose 15 dienen kann. Um Schüttelgeräusche der Barometerdose in der Dämpfungskammer 5 zu vermeiden, kann es zweckmäßig sein, die Barometerdose 15 in der Dämpfungskammer 5 in ihre Lage zu führen. So kann beispielsweise das Gehäuseteil 1 eine in die Dämpferkammer 5 ragende Nase 16 aufweisen, die in eine entsprechend ausgebildete Vertiefung 17 der Barometerdose 15 ragt. Durch eine sich an dem Gehäuseteil 2 einerseits und der gegenüberliegenden Wandung 18 der Barometerdose 15 abstützende weiche Feder 19 wird die Barometerdose an die Nase 16 gepreßt. Die Feder 19 dient dabei primär der Lagesicherung der Barometerdose 15. Auftretende Druckschwankungen indem Fluiddrucksystem führen zu einem Zusammendrücken oder Ausdehnen der Barometerdose 15, wodurch die Pulsation gedämpft wird. Die Barometerdose 15 muß nicht gleichzeitig eine Dichtfunktion ausführen, so daß bei einer Zerstörung der Barometerdose 15 das Fluiddrucksystem zwar nicht mehr optimal arbeitet, aber auch keine Gefahr besteht, daß Fluid aus dem Dämpfungselement austritt und es beispielsweise bei der Verwendung in einem Kraftstoffeinspritzsystem zu Motorbränden kommt.Description of the exemplary embodiment That shown in the drawing The damping element has a damper housing formed from housing parts 1 and 2, wherein the housing parts 1 and 2 are crimped on their outer circumference at 3, below Use of at least one sealing element 4. The through the housing parts 1 and 2 The enclosed damper chamber 5 is connected to a fluid pressure system via connecting pieces 6 and 7 in connection. For example, the damping element can be used in a fuel injection system integrated and the connecting piece 6 via a fuel supply line 8 with be connected to the pressure side of a pulsating delivery fuel pump 9, which delivers fuel from a fuel tank 10. From the connecting piece 7 leads the Fuel supply line 8 then continues to one Fuel metering unit 11, on the one hand, a certain return flow of the fuel allowed via a line 12 to the fuel tank 10 and on the other hand the over the fuel injection valve 13 determines fuel to be injected. In the damper chamber 5, an elastic, all-round enclosed hollow body 15 is arranged, which for example can be filled with a gas or evacuated, so that as an elastic hollow body a barometer can 15 can also be used. To avoid shaking noises in the barometer can To avoid the damping chamber 5, it may be useful to use the barometer box 15 to lead in the damping chamber 5 in their position. For example, the housing part 1 have a protruding into the damper chamber 5 nose 16, which is in a corresponding formed recess 17 of the barometer box 15 protrudes. By one on the housing part 2 on the one hand and the opposite wall 18 of the barometer box 15 supporting soft spring 19, the barometer box is pressed against the nose 16. The spring 19 is used primarily to secure the position of the barometer box 15. Occurring pressure fluctuations in the fluid pressure system result in a compression or expansion of the barometer can 15, which dampens the pulsation. The barometer box 15 does not have to be at the same time perform a sealing function, so that if the barometer box 15 is destroyed, the The fluid pressure system no longer works optimally, but there is also no risk of that fluid emerges from the damping element and it, for example, when using engine fire occurs in a fuel injection system.
Claims (4)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792924796 DE2924796A1 (en) | 1979-06-20 | 1979-06-20 | Damper for fuel injection pulsating flow - has evacuated resilient box inside chamber connected in injection circuit |
JP8151980A JPS563335A (en) | 1979-06-20 | 1980-06-18 | Buffer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792924796 DE2924796A1 (en) | 1979-06-20 | 1979-06-20 | Damper for fuel injection pulsating flow - has evacuated resilient box inside chamber connected in injection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2924796A1 true DE2924796A1 (en) | 1981-01-22 |
Family
ID=6073632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19792924796 Withdrawn DE2924796A1 (en) | 1979-06-20 | 1979-06-20 | Damper for fuel injection pulsating flow - has evacuated resilient box inside chamber connected in injection circuit |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS563335A (en) |
DE (1) | DE2924796A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1016384C2 (en) * | 2000-10-11 | 2002-04-12 | Helvoet B V | Device for damping pressure fluctuations in fuel flow through conduit comprises housing with space divided by membrane into at least first and second chambers |
EP1342911A2 (en) | 2002-03-04 | 2003-09-10 | Hitachi, Ltd. | Fuel feed system |
EP1602823A1 (en) * | 2004-05-19 | 2005-12-07 | J. Eberspächer GmbH Co. KG | Pressure pulsation dampener and fuel dosage pump with a pressure pulsation dampener |
JP2015017621A (en) * | 2014-10-30 | 2015-01-29 | 株式会社デンソー | Pulsation damper |
GB2538711A (en) * | 2015-05-22 | 2016-11-30 | Delphi Automotive Systems Lux | Damper for high pressure fuel pump |
-
1979
- 1979-06-20 DE DE19792924796 patent/DE2924796A1/en not_active Withdrawn
-
1980
- 1980-06-18 JP JP8151980A patent/JPS563335A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1016384C2 (en) * | 2000-10-11 | 2002-04-12 | Helvoet B V | Device for damping pressure fluctuations in fuel flow through conduit comprises housing with space divided by membrane into at least first and second chambers |
EP1342911A2 (en) | 2002-03-04 | 2003-09-10 | Hitachi, Ltd. | Fuel feed system |
EP1342911A3 (en) * | 2002-03-04 | 2008-04-09 | Hitachi, Ltd. | Fuel feed system |
US7513240B2 (en) | 2002-03-04 | 2009-04-07 | Hitachi, Ltd. | High pressure fuel pump provided with damper |
EP2351926A1 (en) * | 2002-03-04 | 2011-08-03 | Hitachi, Ltd. | Fuel feed system |
EP1602823A1 (en) * | 2004-05-19 | 2005-12-07 | J. Eberspächer GmbH Co. KG | Pressure pulsation dampener and fuel dosage pump with a pressure pulsation dampener |
JP2015017621A (en) * | 2014-10-30 | 2015-01-29 | 株式会社デンソー | Pulsation damper |
GB2538711A (en) * | 2015-05-22 | 2016-11-30 | Delphi Automotive Systems Lux | Damper for high pressure fuel pump |
Also Published As
Publication number | Publication date |
---|---|
JPS563335A (en) | 1981-01-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |