WO2000032924A1 - Flachrohrdruckdämpfer zur dämpfung von flüssigkeits-druckschwingungen in flüssigkeitsleitungen - Google Patents
Flachrohrdruckdämpfer zur dämpfung von flüssigkeits-druckschwingungen in flüssigkeitsleitungen Download PDFInfo
- Publication number
- WO2000032924A1 WO2000032924A1 PCT/DE1999/001544 DE9901544W WO0032924A1 WO 2000032924 A1 WO2000032924 A1 WO 2000032924A1 DE 9901544 W DE9901544 W DE 9901544W WO 0032924 A1 WO0032924 A1 WO 0032924A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- flat tube
- pressure
- liquid
- pressure damper
- Prior art date
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
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
-
- 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
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
-
- 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
Definitions
- the invention is based on a flat tube pressure damper for damping fluid pressure vibrations in liquid lines and a fuel supply line according to the preamble of claims 1 and 6.
- a flat tube pressure damper and such a fuel supply line are known from EP 0 235 394 A1.
- the known flat tube pressure damper is integrated in the fuel supply line of an internal combustion engine. In its longitudinal direction, the fuel supply line is divided into an upper, air-filled chamber and a lower, fuel-conducting chamber by an elastic membrane. Splits.
- the flat tube pressure damper is formed by the upper, air-filled chamber and the elastic, fuel-tight membrane.
- the diaphragm absorbs pressure surges in the lower, fuel-conducting chamber caused by switching impulses from injection valves and delivery impulses from an injection pump by elastically deforming and thereby transmitting the pressure vibrations to the air cushion in the upper, air-filled chamber. Due to the elastic deformation of the membrane and the resulting compression of the air cushion in the upper, air-filled chamber, vibration energy is lost, which dampens the pressure vibrations in the lower, fuel-conducting chamber.
- the membrane is clamped between an upper and a lower line wall part of the fuel supply line, the edge of the upper line wall part being overlapped by the edge of the lower line wall part.
- the known flat tube pressure damper has the disadvantage that the upper, air-filled chamber can collapse at high pressure surges, such as occur in particular in the case of leak tests. Since the vibrating diaphragm is held by frictional engagement between the upper and the lower line wall, it can slip out of its seat under high stress. A repair is complex since the corresponding fuel line has to be dismantled and a new membrane has to be inserted. In addition, the wall thickness of the vibratable
- Membrane to be adapted to the respective pressure range in which the flat tube pressure damper is used, so that a variety must be manufactured by various flat tube pressure dampers, for which the manufacturing effort is correspondingly high.
- the flat tube pressure damper according to the invention for damping liquid pressure vibrations has the advantage that the collapse of the liquid in the chamber prevents it from collapsing even in the event of large pressure surges. Since the vibration and damping properties of the flat tube pressure damper according to the invention can be preset as a function of the amount of liquid in the chamber, the production of
- part of the chamber is preferably filled with oil and the other part of the chamber with a gaseous medium, preferably with air at ambient pressure. Due to the high volume elasticity of the air, a good damping effect can be achieved through the chamber. On the other hand, oil has a very low compressibility, which provides a high level of security against collapse of the chamber when the elastic reserves are exceeded.
- the arrangement of the flat tube pressure damper has the advantage that, despite its undesired tightness, no liquid emerges from the liquid line.
- FIG. 1 shows a schematic illustration of a fuel supply device with a preferred embodiment of a flat tube pressure damper according to the invention
- FIG. 2 shows a sectional side view of the flat tube pressure damper from FIG. 1
- FIG. 3 shows a front cross-sectional view of the flat tube pressure damper from FIG. 2
- FIG. 4 shows a diagram for the volume change of the flat tube pressure damper of Figures 2 and 3 depending on the external pressure.
- a fuel supply device 2 is shown in a simplified and schematic manner in FIG. 1, in which fuel is supplied from a tank 4 to a tubular fuel distributor 6 of an internal combustion engine, which is otherwise not shown.
- a tank installation unit 8 with a fuel pump 10 is arranged in the tank 4.
- the Fuel pump 10 and the fuel distributor 6, a fuel filter 12 is interposed.
- fuel is distributed to the injection valves 14 in a known manner. The fuel is supplied on one end of the fuel distributor 6, while on the other end, non-injected fuel is supplied via a pressure regulator
- the fuel supply device 2 could also be designed to be return-free, in which case the pressure regulator 16 is arranged in the tank installation unit 8 and the ambient pressure serves as a reference pressure. Inside the fuel distributor 6 is the one according to the invention
- Flat tube pressure damper 1 designed as a flat tube 18 and arranged, for example, horizontally, the two ends 20 of the flat tube 18 being tapered, for example, and encompassed by clamps 22 fastened to the end faces of the fuel distributor 6, so that the flat tube pressure damper 1 has radial and axial
- the flat tube 18 consists, for example, of sheet steel with an essentially elliptical cross section.
- the cross section can also have a round, square or other shape.
- the ends 20 of the flat tube 1 8 are closed and taper, for example, in the latter
- the thickness and the width or the cross section of the chamber 24 are preferably small compared to their length. Due to the small wall thickness, the chamber wall 26 can deform in a flexible manner when fuel pressure vibrations in the fuel distributor 6 caused by switching impulses of the injection valves 14 act on them from the outside. Vibration energy is extracted from the system, making it the desired one
- Damping of the fuel pressure vibrations comes. Because of the preferably elongated shape of the chamber 24, it deforms mainly in the radial direction under the action of pressure.
- the chamber wall 26 is in one piece and has the same wall thickness everywhere.
- only part of the chamber wall 26 could deform elastically, while the other part behaves quasi-rigid, which e.g. can be realized by sectionally different wall thicknesses or sectionally different material of the chamber wall 26.
- the chamber 24 is filled with a gaseous medium, preferably with air 28, and with a liquid medium, preferably with oil 30, so that the chamber 24 cannot collapse in the event of large pressure surges.
- the material (modulus of elasticity) and geometry of the chamber 24 as well as their degree of filling with air 28 and oil 30 are dimensioned in such a way that at pressures up to twice the operating pressure there are only purely elastic and not plastic deformations.
- the degree of filling with oil is preferably 88% to 92%, ie. that 88% to 92% of the chamber volume is filled with oil 30 and the rest preferably with air 28 under ambient pressure.
- the chamber 24 can also be filled with another gas under ambient pressure or under a different pressure and with another liquid medium.
- limit values for the degree of filling with oil 30, with which the desired volume change behavior of the chamber 24 can still be achieved depend, inter alia, on the material and shape stiffness of the chamber 24 and the type of gaseous and liquid medium, so that the limit values given above are only those preferred embodiment relate.
- the elasticity and damping properties of the chamber 24 can therefore be easily adapted to the prevailing pressure fluctuations in the fuel distributor 6 for a given material and shape stiffness depending on the type of the gaseous and liquid medium and their degree of filling.
- flat tube pressure damper 1 is not limited to fuel-carrying lines, but can serve to dampen pressure vibrations in any type of liquid line.
- FIG. 1 is
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Pipe Accessories (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000585541A JP2002531749A (ja) | 1998-11-26 | 1999-05-26 | 液体導管における液体圧力振動を減衰するための扁平管圧力減衰器 |
EP99936318A EP1049867A1 (de) | 1998-11-26 | 1999-05-26 | Flachrohrdruckdämpfer zur dämpfung von flüssigkeits-druckschwingungen in flüssigkeitsleitungen |
US09/600,839 US6443131B1 (en) | 1998-11-26 | 1999-05-26 | Flat pipe pressure damper for damping oscillations in liquid pressure in pipes carrying liquids |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19854551A DE19854551A1 (de) | 1998-11-26 | 1998-11-26 | Flachrohrdruckdämpfer zur Dämpfung von Flüssigkeits-Druckschwingungen in Flüssigkeitsleitungen |
DE19854551.7 | 1998-11-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000032924A1 true WO2000032924A1 (de) | 2000-06-08 |
Family
ID=7889082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/001544 WO2000032924A1 (de) | 1998-11-26 | 1999-05-26 | Flachrohrdruckdämpfer zur dämpfung von flüssigkeits-druckschwingungen in flüssigkeitsleitungen |
Country Status (6)
Country | Link |
---|---|
US (1) | US6443131B1 (de) |
EP (1) | EP1049867A1 (de) |
JP (1) | JP2002531749A (de) |
CN (1) | CN1288504A (de) |
DE (1) | DE19854551A1 (de) |
WO (1) | WO2000032924A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1150003A1 (de) * | 2000-04-25 | 2001-10-31 | Siemens Automotive Corporation | Dämpferelement für Druckschwingungen im Kraftstoffsystem |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1464940B (zh) * | 2001-08-15 | 2010-10-06 | 臼井国际产业株式会社 | 对置式或直列式发动机中脉动共振点发生范围的控制方法 |
US6568370B1 (en) * | 2001-11-02 | 2003-05-27 | Visteon Global Technologies, Inc. | Fuel pressure damper |
US6854447B2 (en) * | 2001-12-14 | 2005-02-15 | Siemens Vdo Automotive Corp. | Corrugated internal fuel rail damper |
JP3823060B2 (ja) * | 2002-03-04 | 2006-09-20 | 株式会社日立製作所 | 高圧燃料供給ポンプ |
ITTO20020453A1 (it) * | 2002-05-29 | 2003-12-01 | Vhit Spa | Circuito di iniezione di fluido ad alta pressione. |
JP4036153B2 (ja) * | 2003-07-22 | 2008-01-23 | 株式会社日立製作所 | ダンパ機構及び高圧燃料供給ポンプ |
US6901914B1 (en) * | 2004-08-27 | 2005-06-07 | Delphi Technologies, Inc. | Variable stiffness fuel rail pulse damper having extended dynamic range |
DE102006003639A1 (de) * | 2006-01-26 | 2007-08-02 | Robert Bosch Gmbh | Hochdruckspeicherkörper mit integriertem Verteilerblock |
US7694664B1 (en) * | 2009-01-09 | 2010-04-13 | Robert Bosch Gmbh | Fuel rail damper |
US9518544B2 (en) * | 2013-03-19 | 2016-12-13 | Delphi Technologies, Inc. | Fuel rail with pressure pulsation damper |
JP5979092B2 (ja) * | 2013-07-23 | 2016-08-24 | トヨタ自動車株式会社 | パルセーションダンパおよび高圧燃料ポンプ |
GB2547711B (en) * | 2016-02-29 | 2020-01-29 | Delphi Tech Ip Ltd | Common rail with variable inner volume reservoir |
DE102016209423A1 (de) * | 2016-05-31 | 2017-11-30 | Robert Bosch Gmbh | Hochdruckspeicher und Verfahren zur Herstellung eines Hochdruckspeichers |
DE102018204702A1 (de) * | 2018-03-28 | 2019-10-02 | Robert Bosch Gmbh | Brennstoffverteiler für Brennkraftmaschinen |
DE102020128254B4 (de) | 2020-10-27 | 2022-08-18 | Marco Systemanalyse Und Entwicklung Gmbh | Verteilerbalken |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5575262A (en) * | 1993-12-04 | 1996-11-19 | Robert Bosch Gmbh | Damper element for damping compressive oscillations and method for producing the same |
US5617827A (en) * | 1995-12-26 | 1997-04-08 | General Motors Corporation | Fuel rail |
DE19720731A1 (de) * | 1996-05-20 | 1997-11-27 | Denso Corp | Kraftstoffversorgungsgerät für einen Benzinmotor der direkteinspritzenden Art |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2055888A6 (de) * | 1969-08-05 | 1971-05-14 | Cibie Projecteurs | |
US3665967A (en) * | 1970-01-16 | 1972-05-30 | Western Co Of North America | Supercharge hose |
US4056679A (en) * | 1976-09-27 | 1977-11-01 | I-T-E Imperial Corporation | Sodium filled flexible transmission cable |
JPS5925900B2 (ja) * | 1979-11-06 | 1984-06-22 | 東海ゴム工業株式会社 | 防振支持体 |
US4649884A (en) * | 1986-03-05 | 1987-03-17 | Walbro Corporation | Fuel rail for internal combustion engines |
US4897906A (en) * | 1987-11-02 | 1990-02-06 | Proprietary Technology, Inc. | Method of making a fluid pressure surge damper for a fluid system |
SE464778B (sv) * | 1989-10-09 | 1991-06-10 | Electrolux Ab | Vaetskeackumulator |
US5896843A (en) * | 1997-11-24 | 1999-04-27 | Siemens Automotive Corporation | Fuel rail damper |
-
1998
- 1998-11-26 DE DE19854551A patent/DE19854551A1/de not_active Withdrawn
-
1999
- 1999-05-26 WO PCT/DE1999/001544 patent/WO2000032924A1/de not_active Application Discontinuation
- 1999-05-26 CN CN99802169A patent/CN1288504A/zh active Pending
- 1999-05-26 EP EP99936318A patent/EP1049867A1/de not_active Withdrawn
- 1999-05-26 JP JP2000585541A patent/JP2002531749A/ja active Pending
- 1999-05-26 US US09/600,839 patent/US6443131B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5575262A (en) * | 1993-12-04 | 1996-11-19 | Robert Bosch Gmbh | Damper element for damping compressive oscillations and method for producing the same |
US5617827A (en) * | 1995-12-26 | 1997-04-08 | General Motors Corporation | Fuel rail |
DE19720731A1 (de) * | 1996-05-20 | 1997-11-27 | Denso Corp | Kraftstoffversorgungsgerät für einen Benzinmotor der direkteinspritzenden Art |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1150003A1 (de) * | 2000-04-25 | 2001-10-31 | Siemens Automotive Corporation | Dämpferelement für Druckschwingungen im Kraftstoffsystem |
Also Published As
Publication number | Publication date |
---|---|
JP2002531749A (ja) | 2002-09-24 |
EP1049867A1 (de) | 2000-11-08 |
DE19854551A1 (de) | 2000-05-31 |
CN1288504A (zh) | 2001-03-21 |
US6443131B1 (en) | 2002-09-03 |
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