EP1413744B1 - Druckspeicher für ein Common Rail System - Google Patents

Druckspeicher für ein Common Rail System Download PDF

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Publication number
EP1413744B1
EP1413744B1 EP03405025A EP03405025A EP1413744B1 EP 1413744 B1 EP1413744 B1 EP 1413744B1 EP 03405025 A EP03405025 A EP 03405025A EP 03405025 A EP03405025 A EP 03405025A EP 1413744 B1 EP1413744 B1 EP 1413744B1
Authority
EP
European Patent Office
Prior art keywords
storage space
wall
pressure accumulator
accordance
bore
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.)
Expired - Lifetime
Application number
EP03405025A
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German (de)
English (en)
French (fr)
Other versions
EP1413744A1 (de
Inventor
Turhan Yildirim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila NSD Schweiz AG
Original Assignee
Wartsila NSD Schweiz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wartsila NSD Schweiz AG filed Critical Wartsila NSD Schweiz AG
Priority to EP03405025A priority Critical patent/EP1413744B1/de
Publication of EP1413744A1 publication Critical patent/EP1413744A1/de
Application granted granted Critical
Publication of EP1413744B1 publication Critical patent/EP1413744B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations

Definitions

  • the invention relates to a pressure accumulator for a common rail system Internal combustion engine according to the preamble of the independent Claim 1.
  • the invention relates to a pressure accumulator suitable for a common Rail system is suitable in a large diesel engine.
  • Large diesel engines For example, as main propulsion units for ships or as Stationary systems used to generate electricity. They are mostly as slow running two-stroke crosshead machines or as four-stroke machines educated. Pressure accumulators of this type are known e.g. from WO 03 023220 (Prior art under Article 54 (3) EPC) and in DE 199 45 786 known.
  • modern Big diesel engines the fuel injection, the gas exchange, the Water injection and, where appropriate, auxiliary systems, eg. As for control oil, with Common rail systems operated. It is by means of pumps the respective Fluid, e.g.
  • a hydraulic medium for Operation of the outlet valves or a working medium for controlling the Injection conveyed under high pressure into an accumulator, which is also called Accumulator is called.
  • an accumulator which is also called Accumulator.
  • the accumulators are each as a tube-like, at both Ends closed components designed, which is approximately equal to the height Cylinder heads extend along the engine.
  • the tubular basic body the pressure accumulator typically have a plurality of holes, over which the storage space of the pressure accumulator with the respective Supply or actuation devices of the individual cylinders is connectable.
  • the pressure for example, be up to 2000 bar.
  • it is in particular the dynamic, z. B. caused by pressure fluctuations, loads, which place high mechanical demands on the pressure accumulators.
  • the High pressure resistance of the pressure accumulator is particularly by the limited radial bores. These can be the voltages, for example the comparison voltage to increase by a factor of three to four and more.
  • the object of the present invention is to provide a pressure accumulator for a Commmon Rail system to propose an internal combustion engine, in which with very simple measures a very high internal pressure at dynamic load is made possible without the external Dimensions and thus the space requirement of the pressure accumulator increased becomes.
  • the problem solving pressure accumulator is characterized by the features of independent claim 1.
  • a pressure accumulator for a commmon rail System of an internal combustion engine proposed with a tubular Basic body with a wall, the one inside the main body provided storage space for the medium to be stored limited, and with at least one bore for discharging the medium extending through the Wall stretches.
  • On the inside of the wall is at least one in the storage space in reaching, curved vault provided, the is arranged such that the bore within the curved curvature enters the storage space.
  • said area has a curvature, which has the opposite sign as the curvature of the remaining part of Inside the wall, which is the substantially cylindrical Storage space limited.
  • the arch extends over a substantial portion of Length of the storage space and especially preferred over the entire length of the storage space.
  • the main body with the Storage space can be easily, for example, by extrusion, Casting or broaching with a correspondingly shaped broach, getting produced.
  • Another advantageous measure is, on the inside of the wall at least two - for example three - in the memory space Provide in-reaching, curved bulges, each over extend a substantial part of the length of the storage space and with respect to the circumferential direction of the inside of the wall various positions are provided. So it's on the inner circumference distributed several vaults provided, preferably each about extend the entire length of the storage space. Thus, in various directions pointing holes are provided, thereby the flexibility of the accumulator with respect to his Connection options significantly increased.
  • each camber preferably has a height in radial Direction, which is between 5% and 30% of the inner diameter of the Memory space is. With this height is the maximum amount meant, the curvature on the otherwise, for example, circular Contour of the cross section of the storage space protrudes into this.
  • the curvature according to the invention which extends into the storage space, leaves be realized by the memory space at least comprises two substantially cylindrical longitudinal bores, such are arranged so that their cross sections overlap.
  • a Variant is the storage space by two cylindrical To realize longitudinal bores whose axes are parallel and are spaced apart from each other so that the cross sections of Overlap longitudinal bores. This means that the distance between the axes of Longitudinal holes are smaller than the sum of the radii of the two Longitudinal holes.
  • This measure results in a storage space, its inner profile (cross-sectional area perpendicular to the longitudinal axis) the shape has an eight. The area where these eight "constrict” has, then forms two extending into the storage space curved Buckling in the sense of the present invention.
  • the realization form in which the memory space is at least two has overlapping longitudinal bores offers the advantage of a particularly simple production. It only requires the making of two (or more) longitudinal bores in the tubular structure from which the Basic body is produced.
  • the wall of the Base body has on its outer side at least one flat, the is arranged and designed so that the hole on the outside of the Wall opens into a flat surface.
  • This measure will allows, directly on the outside of the wall actuation or Supply devices provided with the medium from the Pressure accumulator to be acted upon - for example, slide valves for the fuel injection.
  • This has the advantage that on high pressure resistant Connecting lines can be dispensed with.
  • a further advantageous variant is that the wall of the Body on its outside at least one flat strip which extends substantially the entire length of the tubular Base body extends. This allows, for example, at the Outside of the high-pressure accumulator to provide a heating element to the Apply heat to the medium in the storage room.
  • the flat strip can also serve as a support, for example for fastening the Pressure accumulator.
  • the pressure accumulator according to the invention is particularly suitable for the Common rail system of a large diesel engine and specially for the common Rail system for fuel injection.
  • Fig. 1 shows a cross section through a first example of a Accumulator, the total with the Reference numeral 1 is designated. The cut is made along the section line I-I in Fig. 2.
  • Fig. 2 shows the same example in a longitudinal section along the line II-II in Fig. 1st
  • the pressure accumulator 1 has a tubular, for example cylindrical, Basic body 2 with a wall 3, the inside 31 a Storage space 4 for the medium, for example fuel under high pressure, limited.
  • the main body 2 and the storage space 4 extend in Direction of a longitudinal axis L.
  • a curvature. 6 provided, extending in the direction of the axis L over a substantial part the storage space 4 and preferably over the entire length of Memory space 4 extends.
  • the curvature is 6, the difference to that of the representation according to the upper part 3a of the wall. 3 thicker than the lower part 3b as shown.
  • the curvature 6 is continuously curved, so it has no flat areas.
  • the curvature of the curvature 6 has the opposite sign as the curvature of the remaining part of the Inner side 31 of the wall 3.
  • the Contour K resulting in a precisely circular cross section of the Memory space 4 would result, dashed added.
  • the transition region 61 between the bulge 6 and the rest of the Inside 31 of the wall 3 is rounded, so here no edges are present and the tensions are low even in these areas being held.
  • the bulge 6 is arranged with respect to the circumferential direction so that the Bore 5 symmetrically in the center of the curvature 6 in the storage space. 4 opens.
  • the Curvature of the curvature 6 does not have to be constant either. It is essential however, that the curvature has a finite value and another Sign as the curvature of the rest of the inside 31, that is, the Buckle 6 must extend into the storage space 4. It is also essential that the bore 5 in total within the curvature 6 in the Memory space 4 opens, that is, the mouth of the bore 5 in the Storage space 4 must be completely covered by the curvature 6.
  • the accumulator 1 has several holes 5. These are then arranged one behind the other in the first embodiment, so that each of the holes 5 as described in the center of the curvature 6 in the memory space opens.
  • the pressure accumulator 1 Due to the curvature 6, the pressure accumulator 1 has a Internal shape optimized with respect to the stresses.
  • the curvature 6 By in the Storage space 4 projecting embodiment of the curvature 6 in the in terms of stresses critical area where the holes 5 This area remains under pressure when pressurized Compressive stresses.
  • known accumulators are directly at Pressurization generates tangential stresses, ie tensile stresses. In the embodiment takes place only at significantly higher Strains of transition to the range of tensile stresses. Thereby can the accumulator 1 even with dynamic Loads are exposed to significantly higher internal pressures.
  • the inner shape of the pressure accumulator 1 this can in Compared to known memories a multiple of the internal pressure get abandoned.
  • at the same internal pressure as in known storage and at the same volume of the memory space of Memory significantly slimmer, so with a smaller thickness the wall 3, to be configured.
  • the curvature 6 extends over the entire length of Memory space 4, so that the inner profile, bringing the cross section of the Memory space 4 is meant, over the entire length of the main body. 2 is equal to.
  • the main body 2 of a Accumulator 1 can easily by extrusion, casting or spaces by means adapted to the desired cross-section Tool be made. Subsequent local internal work on the inside 31 of the wall 3 are no longer needed.
  • Another advantage is that the holes 5 with respect to the longitudinal direction can be drilled at any point, resulting in flexibility significantly increased in terms of adaptation to different circumstances.
  • a further advantageous measure consists in, on the outside 32 the wall 3 of the body 2 to provide a flattening 7, the so is arranged and configured that the bore 5 on the outside 32 in a flat surface opens.
  • This has the advantage that the devices 10 (in Fig. 1 and Fig. 2 indicated by dashed lines), with the medium from the Pressure accumulator to be acted upon, for example components of Fuel injection system to be mounted directly on the base body 2 can, so that can be dispensed with connecting lines.
  • FIG. 3 shows, in a representation analogous to FIG. 1, a variant of the first embodiment Example.
  • the external shape of the Main body 2 is not cylindrical, but has two flat strips 8, extending substantially over the entire length of the tubular Base body 2 extend.
  • the flat strips 8 are arranged so that the holes 5 outside these flat strips 8 in the outside 32nd open out.
  • additional equipment 9 can be arranged.
  • Large diesel engines are typically used as heavy fuel oil.
  • the heavy oil must be heated to obtain the necessary viscosity. This can be on one of the flat strips 8 a heating than Additional device 9 may be provided to the heavy oil in the Storage space 4 to supply heat.
  • FIG. 4 shows, in a representation analogous to FIG. 1, a cross section through FIG a second example of a pressure accumulator 1.
  • the following is only on the differences to the first Example received.
  • the explanations related to In the first example the same applies analogously for the second example.
  • the reference numerals the same meaning.
  • the bulges 6 on the inside 31 the wall 3 is provided.
  • Each of the bulges 6 extends over one essential part of the length of the storage space 4, preferably over its whole length.
  • the vaults 6 are uniform over the circumference of Inside 31 distributed.
  • There are several holes 5 are provided, each in the center of one of the vaults 6 open into the storage space 4.
  • flats 7 are provided, which are arranged so that the holes 5 on the outside 32 in a flat surface open out.
  • the vaults unevenly to distribute over the circumference.
  • the holes 5 for the removal of Medium from the storage space 4 over the circumference of the pressure vessel. 1 distributed. As a result, more holes 5 can be provided. Furthermore, can the medium without great effort in different directions be carried away.
  • the flattenings 7 extend over the entire length of the main body 2, so that the flats 7 respectively form a flat strip 8, which extends substantially over the entire length of the main body 2 extends.
  • the holes 5 open then each in one of these flat strips 8 a.
  • FIG. 6 shows a variant in which the outer surface 32 of the wall 3 forms a cylinder jacket.
  • the device 10 (FIG. 1, FIG explained above, directly attached to the outside 32 of the wall 3 become.
  • the bore 5 with an internal thread provided, in which a pressure line or a connection part screwed becomes.
  • a flange preferably on one of Flattening 7 or one of the flat strips 8 to attach. in principle own all known connection and Mounting options.
  • Fig. 7 shows a cross section through the embodiment.
  • the memory space 4 is at this embodiment of two cylindrical longitudinal bores 41, 42, which extend parallel to each other in the direction of the axis L.
  • the axes L1, L2 of the longitudinal bores 41, 42 have a distance E from one another, which is dimensioned such that the cross sections of the longitudinal bores Overlap 41.42.
  • the constrictions of these eight thus form two inventive curved bulges 6, which in the Interior of the storage space 4 extend.
  • In the representation according to upper vault 6 opens the hole 5.
  • a bore in the Republicsgemäss lower vault 6 opens.
  • the respective distance of the axes L1 and L2 from the axis L can For example, about 40 percent of the radius of the associated longitudinal bore 41 and 42, respectively.
  • the distance between the longitudinal holes 41,42 from the center (Axis L) is defined by the diameter of the radial bore 5 and the permissible fatigue limit determined.
  • the two longitudinal holes 41 and 42nd symmetrical with respect to the axis L. But this is not necessary.
  • the longitudinal bores have the same radius. It can but also different radii are used.
  • the embodiment is characterized in particular by his simple production. It only needs two holes around the Storage space 4 with the inventive bulges 6 produce.
  • Fig. 8 shows in cross section a variant of the embodiment.
  • the storage space 4 consists of three longitudinal bores 41,42,43, which are arranged such that their cross sections overlap.
  • FIG. 8 shows, this results in three bulges 6 according to the invention generated, each protrude into the storage space 4.
  • In each of these Vaulting opens a radial hole 5.
  • the longitudinal bores 41, 42, 43 are symmetrical with respect to Axis L arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
EP03405025A 2002-10-23 2003-01-22 Druckspeicher für ein Common Rail System Expired - Lifetime EP1413744B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03405025A EP1413744B1 (de) 2002-10-23 2003-01-22 Druckspeicher für ein Common Rail System

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP02405910 2002-10-23
EP02405910 2002-10-23
EP03405025A EP1413744B1 (de) 2002-10-23 2003-01-22 Druckspeicher für ein Common Rail System

Publications (2)

Publication Number Publication Date
EP1413744A1 EP1413744A1 (de) 2004-04-28
EP1413744B1 true EP1413744B1 (de) 2005-12-28

Family

ID=32524113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03405025A Expired - Lifetime EP1413744B1 (de) 2002-10-23 2003-01-22 Druckspeicher für ein Common Rail System

Country Status (7)

Country Link
EP (1) EP1413744B1 (ja)
JP (2) JP4542760B2 (ja)
KR (1) KR101024863B1 (ja)
CN (1) CN100360791C (ja)
DE (1) DE50302044D1 (ja)
DK (1) DK1413744T3 (ja)
PL (1) PL202354B1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2299102A1 (en) 2009-09-07 2011-03-23 OMT Officine Meccaniche Torino S.p.A. High-pressure fuel accumulator for common-rail injection systems
CN1891384B (zh) * 2005-06-27 2012-08-22 瓦特西拉瑞士股份有限公司 深孔钻具、钻孔方法和使用深孔钻具加工出来的工件

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007018471A1 (de) 2007-04-19 2008-10-23 Robert Bosch Gmbh Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal
FI120844B (fi) 2007-05-31 2010-03-31 Waertsilae Finland Oy Polttoaineen syöttöjärjestelmän polttoainevarasto
JP2011069254A (ja) * 2009-09-24 2011-04-07 Daihatsu Motor Co Ltd 内燃機関の燃料デリバリパイプ
DE102010064021A1 (de) 2010-12-23 2012-06-28 Robert Bosch Gmbh Rohrförmiger Druckspeicher, insbesondere für gemischverdichtende, fremdgezündete Brennkraftmaschinen
EP2511517B1 (en) 2011-04-15 2015-04-01 Wärtsilä Schweiz AG A high pressure fluid rail
DE102011075054A1 (de) * 2011-05-02 2012-11-08 Robert Bosch Gmbh Brennstoffverteiler
FR2989122B1 (fr) * 2012-04-10 2016-02-05 Coutier Moulage Gen Ind Rampe d'injection de carburant pour moteur a combustion interne
JP6021220B2 (ja) * 2012-11-16 2016-11-09 ボッシュ株式会社 コモンレール
JP6300232B2 (ja) * 2014-09-10 2018-03-28 株式会社スギノマシン 流路構造
DE102016210391A1 (de) * 2016-06-13 2017-12-14 Hirschvogel Umformtechnik Gmbh Druckbelastetes Bauteil sowie Verfahren zu dessen Herstellung

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WO2003023220A1 (de) * 2001-09-05 2003-03-20 Siemens Aktiengesellschaft Kraftstoffhochdruckspeicher für ein speichereinspritzsystem

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JP3841370B2 (ja) * 1996-12-07 2006-11-01 臼井国際産業株式会社 コモンレール
CA2230742A1 (en) * 1997-03-03 1998-09-03 Usui Kokusai Sangyo Kaisha Limited Common rail and method of manufacturing the same.
JP3916178B2 (ja) * 1997-03-04 2007-05-16 臼井国際産業株式会社 コモンレール
DE19913793A1 (de) * 1999-03-26 2000-10-19 Daimler Chrysler Ag Verfahren zum Herstellen einer Hochdruckleitung
DE19945786C1 (de) * 1999-09-24 2000-11-16 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE19948338A1 (de) * 1999-10-07 2001-04-12 Bosch Gmbh Robert Verfahren zur Bearbeitung eines Kraftstoffhochdruckspeichers, Kraftstoffhochdruckspeicher und Anschlussstutzen zur Anwendung des Verfahrens
DE19948339C1 (de) * 1999-10-07 2000-12-14 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
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Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003023220A1 (de) * 2001-09-05 2003-03-20 Siemens Aktiengesellschaft Kraftstoffhochdruckspeicher für ein speichereinspritzsystem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1891384B (zh) * 2005-06-27 2012-08-22 瓦特西拉瑞士股份有限公司 深孔钻具、钻孔方法和使用深孔钻具加工出来的工件
EP2299102A1 (en) 2009-09-07 2011-03-23 OMT Officine Meccaniche Torino S.p.A. High-pressure fuel accumulator for common-rail injection systems

Also Published As

Publication number Publication date
PL202354B1 (pl) 2009-06-30
KR20040036554A (ko) 2004-04-30
EP1413744A1 (de) 2004-04-28
JP2004162701A (ja) 2004-06-10
PL363018A1 (en) 2004-05-04
JP4542760B2 (ja) 2010-09-15
DK1413744T3 (da) 2006-02-13
DE50302044D1 (de) 2006-02-02
CN1497164A (zh) 2004-05-19
JP2010169099A (ja) 2010-08-05
CN100360791C (zh) 2008-01-09
KR101024863B1 (ko) 2011-03-31

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