EP1815130B1 - Systeme d'injection de carburant comprenant plusieurs accumulateurs de pression - Google Patents

Systeme d'injection de carburant comprenant plusieurs accumulateurs de pression Download PDF

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Publication number
EP1815130B1
EP1815130B1 EP05801575A EP05801575A EP1815130B1 EP 1815130 B1 EP1815130 B1 EP 1815130B1 EP 05801575 A EP05801575 A EP 05801575A EP 05801575 A EP05801575 A EP 05801575A EP 1815130 B1 EP1815130 B1 EP 1815130B1
Authority
EP
European Patent Office
Prior art keywords
pressure
accumulator
injection system
fuel
fuel injection
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.)
Not-in-force
Application number
EP05801575A
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German (de)
English (en)
Other versions
EP1815130A1 (fr
Inventor
Juergen Hanneke
Andreas Wengert
Kurt Blank
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1815130A1 publication Critical patent/EP1815130A1/fr
Application granted granted Critical
Publication of EP1815130B1 publication Critical patent/EP1815130B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the invention relates to a fuel injection system for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection system is by the WO-A-2004/013487 known.
  • This fuel injection system has a high-pressure pump and a plurality of injectors. Between the high-pressure pump and the injectors, a pressure accumulator is arranged in each case for each injector. In this case, each pressure accumulator can be optimally adapted in terms of elasticity and storage volume at the associated injector.
  • This fuel injection system 102 includes a fuel tank 104 from which fuel 106 is delivered by an electric or mechanical fuel pump 108. Via a low-pressure fuel line 110, the fuel 106 is conveyed to a high-pressure fuel pump 111. Of the high pressure fuel pump 111, the fuel 106 passes through a high pressure fuel line 112 to a common rail 114. On the common rail 114 a plurality of fuel injectors or injectors 116 are connected, which inject the fuel 106 into combustion chambers 118 of an internal combustion engine, not shown. In this fuel injection system 102, a common high-pressure accumulator, the so-called common rail 114, is provided for all injectors 116. From this structure, the term "common rail" for such fuel injection systems derived.
  • the fuel injection system according to the invention with the features of claim 1 has the advantage that the functionality of the pressure accumulator is further improved by each comprising a fuel filter.
  • At least one first high pressure port and a branch for an injector is provided at each pressure accumulator.
  • a particularly preferred embodiment of the fuel injection system according to the invention provides that a second high pressure port is provided at each accumulator and that the at least two pressure accumulators are connected in series. This simplifies the construction and space requirements further.
  • a pressure sensor and / or a pressure control valve can be provided in a further particularly advantageous embodiment of the invention, so that detected by a central component of the pressure in the high pressure region of the fuel injection system and optionally adjusted to a desired value.
  • a storage volume filled with fuel is provided in each pressure accumulator. It is particularly advantageous if this storage volume and the elasticity of the pressure accumulator are matched to the injection quantities and the operating behavior of the associated injector. This results in a further improved performance of the injectors, which has an advantageous effect on noise, emissions and fuel consumption and smoothness of the internal combustion engine.
  • the pressure accumulator is produced by forging or casting. If necessary, for example, the storage volume from the blank by machining such as drilling, milling and / or turning are worked out.
  • the first high-pressure port and / or the second high-pressure port and / or the branch can be welded to the storage volume.
  • the high-pressure connections and / or the branch are welded to the storage volume. It is important to ensure that the weld is designed so that no spatter can get into the storage volume, as such spatter can cause malfunction of the injectors.
  • first high-pressure connection and / or the second high-pressure connection and / or the branch can be screwed to the storage volume. Which of the variants mentioned is given preference in individual cases depends on the circumstances of the individual case.
  • FIG. 1 a fuel injection system 102 according to the invention is shown greatly simplified as a block diagram. From the fuel tank 104 to the high-pressure fuel pump 111 with the quantity control valve MSV fuel injection system of the invention is the same structure as the basis of the FIG. 5 previously described common rail fuel injection system. The injectors 116 and the combustion chambers 118 of the internal combustion engine are the same.
  • each injector 116 is associated with an accumulator 120, which interacts optimally with the injector 116 in terms of storage volume and elasticity. Since the injectors 116 of an internal combustion engine are identical, of course, the pressure accumulator 120 of an internal combustion engine can be designed identical. By the resolution of the required storage volume to a plurality of pressure accumulator 120, it is also possible to arrange the pressure accumulator 120 closer to the associated injectors 116. This results in advantages in the operating behavior, as compared to a fuel injection system according to FIG. 5 - The pressure oscillations between accumulator and injector 116 have a much shorter duration, so that these pressure oscillations have no disturbing influences on the performance of the injectors 116.
  • each pressure accumulator 120 with the numbers 1, 2 - n are connected in series. This implies that each pressure accumulator 120 has a first high pressure port and a second high pressure port. At each of these high pressure ports (not shown in FIG. 1 ), a high pressure fuel line 112 is connected. At the last in this series pressure accumulator 120 with the number "n" a high-pressure fuel line 112 is connected. This high-pressure fuel line 112 opens into a pressure regulating valve 122. In this pressure regulating valve 122, if necessary, a pressure sensor (not shown) be integrated. This makes it possible to regulate and / or measure the pressure in the high-pressure region of the fuel injection system 102 with only one pressure regulating valve 122 and one pressure sensor.
  • the pressure regulating valve 122 is connected to a relief line 124, which opens into the fuel tank 104. Since, of course, the pressure accumulators 120 are produced in the same number as the injectors 116 and this number is significantly higher than the common rails 114 according to the fuel injection system of the prior art, considerably more money can be invested in automating the production of these pressure accumulators 120 so that a substantial portion of the additional costs resulting from the increase in the number of pressure accumulators can be compensated for by further process automation.
  • FIG. 2 a first embodiment of a pressure accumulator 120 according to the invention is shown in different views.
  • the pressure accumulator 120 according to the invention essentially consists of a storage volume 124, a first high-pressure port 128, a second high-pressure port 130 and a branch 132.
  • the first high pressure port 128 and the second high pressure port 130 are identical in construction and have a substantially frusto-conical sealing surface. At this sealing surface, an unillustrated nipple of the high-pressure fuel line 112 is pressed. This can be done for example by means of a union nut, not shown, which is screwed onto an external thread 136 of the high-pressure connections 128 and 130, respectively.
  • the branch 132, as well as the high pressure ports 128 and 130 made by forging or other forming process. For example, it would be possible to first forge a blank into a cylindrical shape, so that the storage volume 126 is formed. Subsequently, the branch 132 is produced in a further forming process. In final processing steps, the diameter at the end of the pressure accumulator 120 can now be reduced by upsetting or another deformation process so far that the first high-pressure port 128 and the second high-pressure port 130 are formed.
  • the seal seat 124 and the through bore 136 in the high pressure ports 128 and 130, which make the hydraulic connection to the storage volume 126, can also be made by forming or by machining.
  • a circumferential bead 140 is provided.
  • a union nut can be pushed onto the branch 132 and then between the union nut (not shown) and the bead 140 a split ring (not shown) are inserted. Subsequently, the union nut can be screwed to a high pressure port of an injector 116.
  • a so-called filter bore 142 is provided inside the branch 132.
  • This filter bore 142 initially establishes a hydraulic connection between the storage volume 126 and the branch 132.
  • a filter (not shown), for example a rod filter or a sieve-like filter. This prevents impurities from the fuel from entering the connected injector 116 (see FIG FIG. 1 ) can get.
  • FIG. 3 a second embodiment of a pressure accumulator 120 according to the invention is shown.
  • the filter bore 142 in the embodiment according to FIG. 3 is arranged in the longitudinal axis of the pressure accumulator 120.
  • a connecting bore 144 passes through the branch 132, so that in this way the hydraulic connection between the storage volume 126 and the branch 132 or the injector 116 connected thereto will be produced.
  • the inner contour of this second embodiment of a pressure accumulator 120 according to the invention is somewhat more complex, this component can also be produced by forming. If necessary, subsequent machining operations on the pressure accumulator 120 are made subsequent to the forming.
  • FIG. 4 Embodiments of pressure accumulator 120 according to the invention are shown. An essential feature of this pressure accumulator 120 is its multi-part construction.
  • the second high-pressure port 130 is welded to the storage volume 126. The weld is in FIG. 4 designated by the reference numeral 144.
  • the first high pressure port 128 is in the embodiment according to FIG. 4 with a union nut 146, which cooperates with an external thread 148 of the pressure accumulator 120, screwed and braced.
  • a sealing surface 150 between the first high-pressure port 128 and the pressure accumulator 120 a biting edge, a recess or other configurations known from the prior art can be provided. This biting edge and the Einpass are in FIG. 4 do not recognize in detail. However, it is important that the sealing surface 150 remains tight even with very high and swelling compressive stresses over the entire life.

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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)

Claims (8)

  1. Installation d'injection de carburant (102) pour un moteur à combustion interne ayant une pompe haute pression (111), au moins deux injecteurs (116) et un accumulateur de pression installé entre la pompe haute pression (111) et au moins les deux injecteurs (116), et un accumulateur de pression (120) est associé à chaque injecteur (116),
    caractérisée en ce que
    chaque accumulateur de pression (120) comporte un filtre à carburant, chaque accumulateur de pression (120) comporte un perçage de filtre (142) pour recevoir le filtre à carburant, et
    le filtre à carburant est réalisé sous la forme d'un filtre tige ou d'un filtre crépine.
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    chaque accumulateur de pression (120) comporte au moins un premier branchement de haute pression (128) et une dérivation (132) pour un injecteur (116).
  3. Installation d'injection de carburant selon la revendication 1 ou 2,
    caractérisée en ce que
    chaque accumulateur de pression (120) comporte un second branchement haute pression (130), et
    au moins les deux accumulateurs de pression (120) sont branchés en série.
  4. Installation d'injection de carburant selon les revendications précédentes,
    caractérisée en ce que
    chaque accumulateur de pression (120) comporte un volume d'accumulation (126) rempli de carburant.
  5. Installation d'injection de carburant selon la revendication 4,
    caractérisée en ce que
    le volume d'accumulation (126) et l'élasticité de l'accumulateur de pression (120) sont définis selon l'injecteur correspondant (116).
  6. Installation d'injection de carburant selon les revendications précédentes,
    caractérisée en ce que
    l'accumulateur de pression (120) est réalisé par transformation notamment par forgeage ou par moulage notamment par moulage de précision.
  7. Installation d'injection de carburant selon les revendications précédentes,
    caractérisée en ce que
    le premier branchement haute pression (128) et/ou le second branchement haute pression (130) et/ou la dérivation (132) sont soudés (144) au volume accumulateur (126).
  8. Installation d'injection de carburant selon les revendications 1 à 6,
    caractérisée en ce que
    le premier branchement haute pression (128) et/ou le second branchement haute pression (130) et/ou la dérivation (132) sont vissés (146) au volume accumulateur (126).
EP05801575A 2004-11-17 2005-10-20 Systeme d'injection de carburant comprenant plusieurs accumulateurs de pression Not-in-force EP1815130B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004055266A DE102004055266A1 (de) 2004-11-17 2004-11-17 Kraftstoffeinspritzanlage mit mehreren Druckspeichern
PCT/EP2005/055412 WO2006053812A1 (fr) 2004-11-17 2005-10-20 Systeme d'injection de carburant comprenant plusieurs accumulateurs de pression

Publications (2)

Publication Number Publication Date
EP1815130A1 EP1815130A1 (fr) 2007-08-08
EP1815130B1 true EP1815130B1 (fr) 2008-11-26

Family

ID=35446006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05801575A Not-in-force EP1815130B1 (fr) 2004-11-17 2005-10-20 Systeme d'injection de carburant comprenant plusieurs accumulateurs de pression

Country Status (8)

Country Link
US (1) US7748364B2 (fr)
EP (1) EP1815130B1 (fr)
JP (1) JP2008520887A (fr)
KR (1) KR20070084263A (fr)
CN (1) CN101061309A (fr)
AT (1) ATE415555T1 (fr)
DE (2) DE102004055266A1 (fr)
WO (1) WO2006053812A1 (fr)

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JP4592661B2 (ja) * 2006-08-31 2010-12-01 本田技研工業株式会社 燃料噴射装置
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DE102007039893B4 (de) * 2007-08-23 2013-05-08 Continental Automotive Gmbh Einspritzanlage für eine Brennkraftmaschine
BRPI0816923A2 (pt) 2007-09-13 2015-03-17 Ganser Hydromag Dispositivo de injeção de combustível.
DE102009027182A1 (de) * 2009-06-25 2010-12-30 Robert Bosch Gmbh Einspritzsystem zum Einspritzen von Fluid in einen Abgastrakt
JP5508119B2 (ja) * 2010-04-28 2014-05-28 愛三工業株式会社 フューエルデリバリパイプ
DE102010064169A1 (de) * 2010-12-27 2012-06-28 Robert Bosch Gmbh Druckspeichervorrichtung für ein Kraftstoffeinspritzsystem
DE102011005096A1 (de) * 2011-03-04 2012-09-06 Man Diesel & Turbo Se Verbrennungsmotor
CA2754183C (fr) 2011-10-05 2013-01-08 Westport Power Inc. Module de gestion du debit massique et d'amortissement des pulsations de pression dans une conduite d'alimentation en carburant gazeux
CN106414930B (zh) 2014-06-11 2019-06-25 天纳克汽车经营有限公司 带有管线压力控制阀的流体递送系统
CN105673154B (zh) 2014-11-21 2019-11-08 天纳克（苏州）排放系统有限公司 共轨、该共轨的应用、尿素喷射系统及其控制方法
EP3228839B1 (fr) * 2014-11-21 2019-09-25 Tenneco (Suzhou) Emission System Co.,Ltd. Ensemble rail commun, système d'injection d'urée et son application
RU2576751C1 (ru) * 2015-03-20 2016-03-10 Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" Устройство для раздачи топлива к форсункам двигателя
RU2576759C1 (ru) * 2015-03-20 2016-03-10 Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" Устройство для раздачи топлива к форсункам двигателя внутреннего сгорания
JP7102755B2 (ja) * 2018-02-02 2022-07-20 マツダ株式会社 エンジンの燃料供給装置
DE102018118120A1 (de) * 2018-07-26 2020-01-30 Liebherr-Components Deggendorf Gmbh Anschlussstück für Kraftstoffinjektor eines Verbrennungsmotors

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Also Published As

Publication number Publication date
DE102004055266A1 (de) 2006-05-18
US7748364B2 (en) 2010-07-06
CN101061309A (zh) 2007-10-24
EP1815130A1 (fr) 2007-08-08
US20090145400A1 (en) 2009-06-11
WO2006053812A1 (fr) 2006-05-26
JP2008520887A (ja) 2008-06-19
DE502005006101D1 (de) 2009-01-08
ATE415555T1 (de) 2008-12-15
KR20070084263A (ko) 2007-08-24

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