EP1435455A1 - Elément amortisseur pour un accumulateur haute pression - Google Patents

Elément amortisseur pour un accumulateur haute pression Download PDF

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Publication number
EP1435455A1
EP1435455A1 EP03015857A EP03015857A EP1435455A1 EP 1435455 A1 EP1435455 A1 EP 1435455A1 EP 03015857 A EP03015857 A EP 03015857A EP 03015857 A EP03015857 A EP 03015857A EP 1435455 A1 EP1435455 A1 EP 1435455A1
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EP
European Patent Office
Prior art keywords
pressure
storage space
throttle
hydraulic
vibration damping
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Withdrawn
Application number
EP03015857A
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German (de)
English (en)
Inventor
Marco Vorbach
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 EP1435455A1 publication Critical patent/EP1435455A1/fr
Withdrawn legal-status Critical Current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
    • F02M55/04—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
    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • 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 hydraulic high-pressure accumulator a storage space for a hydraulic fluid as well at least one connection for the supply and for the Removal of the high-pressure hydraulic Liquid from the storage space, being in the storage space a vibration damping element is arranged.
  • Hydraulic high-pressure accumulators can be found, for example, at Fuel injection systems for internal combustion engines Use. Alternatively, such hydraulic systems also on flow test benches and other test benches, as well as used in the chemical industry.
  • a high-pressure pump delivers in common rail injection systems the fuel to be injected from a tank into the Central high-pressure fuel accumulator, which acts as a "common rail" referred to as.
  • Lead from the high-pressure fuel reservoir High pressure lines to the individual injectors of the Internal combustion engine through which fuel enters the combustion chambers is injected.
  • the individual injectors are in Dependence on the operating parameters of the Internal combustion engine controlled by a control device, so that the desired amount of fuel to the desired Time in the combustion chambers of the internal combustion engine is injected.
  • Through the high-pressure fuel reservoir are the pressure generation and the injection from each other decoupled.
  • a conventional high-pressure fuel storage is for Example described in DE 196 00 480.
  • the known High-pressure fuel accumulator consists of a elongated tubular body with several Connections for supplying injectors.
  • the tubular Body is used to maintain pressure, to dampen Pressure surges in the high pressure area of the Fuel injection system and the distribution of the Fuel to the various injectors.
  • pressure fluctuations in the High-pressure fuel accumulator can cause some injectors as a result of Forming a standing wave is not the desired one Inject the amount of fuel.
  • in the rail and rising pressure waves cause the Alternating or stochastic injectors not the Inject the desired amount of fuel.
  • Vibration damping element Part of the electricity runs inside Vibration damping element, another part of the current outside on the same vibration damping element.
  • the outer Side between the annulus and the vibration damping element represents a dead end for the fluid, so that this through the gaps in the vibration damping element must press and there is a pressure throttling.
  • the invention has for its object a High-pressure hydraulic accumulator of the type mentioned at the beginning To provide its damping properties in particular can also dampen high amplitudes and Avoid individual vibrations. In addition, both Overpressure waves and vacuum waves are damped can.
  • This task is done with a hydraulic high pressure accumulator a storage space for a hydraulic fluid as well at least one connection for the supply and the discharge hydraulic fluid under high pressure the storage space, being in the storage space
  • Vibration damping element is arranged, solved, in which the vibration damping element at least one Throttle disc includes that in the storage space in Longitudinal direction of the storage space guided resiliently is, the throttle disc is part of the cross section of the storage space leaves open for the passage of the hydraulic fluid.
  • the springs will return to their original position deferred once the maximum of the local pressure wave has passed the throttle disc, being the stored one Give energy back to the hydraulic fluid. hereby the system begins to oscillate, taking the fuel between the throttle disks in turn as dampers for the Vibrations acts. As a result, the course of the respective pressure wave flattened, pressure rise or pressure drop also occurs delayed and with less incline, that is Maximum is lower. It is achieved that Single pressure vibrations superimposed in a system Vibrations are transferred. The individual vibrations are less pronounced in terms of their amplitude, and there are no standing waves in the system.
  • the at least one throttle disc has a bore that is particularly centrally located, and by which Fluid and the pressure wave are then reduced in force continue, by hitting the pressure wave on the Throttle plate a deflection of the throttle plate and thus converts the pressure energy into spring energy becomes.
  • the Throttle disks with regard to their outer contour and / or Dimensions of the inner contour and / or dimensions of the Pressure accumulator are adjusted. This will in particular achieved that safe guidance of the throttle discs is given, and moreover it can be avoided that Larger amounts of the fluid on the outside of the throttle disc squeeze past.
  • the Springs that support and stabilize the throttle plate with regard to their external dimensions also essentially the Correspond to the internal dimensions of the storage space, so that the Springs which have a certain longitudinal extent and for example, include multiple spring windings, if they are designed as coil springs, safely in the storage space are guided and so a tilting or kinking of the spring and thus a hindrance to the compressibility of the springs can be avoided. By guiding the springs ensures that the pressure energy to be converted by the springs can be picked up and released again, over a variety of cycles.
  • the Throttle disks with some distance to the inner wall of the Storage space are performed, then be provided can, the throttle discs without bore or with additional hole in the middle or on another Training position.
  • Vibration damping devices consisting of springs and Throttle disks, arranged one behind the other, the various vibration damping devices can have different damping parameters.
  • the Damping parameters can on the one hand via the mass and the Spring constant of the vibrating mass system as well as the other can be set via the flow.
  • multiple holes can be provided provide, with an enlargement of the Bore cross section of the throttle discs Throttle coefficient is reduced and a reduction in the Deflection amplitude of the throttle discs is achieved. Furthermore, by increasing the spring force Reduction of the deflection of the throttle disks achieved become. In this way it can be done Vibration damping element on the type of expected Set vibrations with regard to frequency and amplitude.
  • the Throttle disks are arranged between two springs the throttle discs are preloaded in a basic position keep at constant pressure in the storage space, and that ever according to the direction of the pressure difference Deflection of the throttle disc in the longitudinal direction or axial direction of the elongated Storage space. This way it can be special simply both a balance of overpressure and of Vacuum waves can be achieved, both types of pressure can be equalized equally well.
  • the Hydraulic high-pressure accumulator a high-pressure fuel accumulator for fuel injection systems for internal combustion engines
  • the storage space in particular as a common rail can be trained.
  • the storage space can alternatively but also be a separate storage space, for example is connected downstream of a common rail.
  • High pressure hydraulic accumulator Part of a hydraulic system is a test bench, in particular Flow test stands for fuel injectors thereof benefit, since these often have problems with pressure surges occur.
  • use in the chemical industry conceivable as advantageous.
  • FIG. 1 shows a first embodiment of a Hydraulic high pressure storage system 4, namely one High-pressure fuel storage system in longitudinal section.
  • the High-pressure fuel accumulator has a common rail 10 into the high-pressure fuel via a Inflow 12 arrives.
  • the common rail has an im Essentially cylindrical geometry.
  • the fuel is in the inlet 12 by means of a not shown High pressure fuel pump promoted.
  • the end 14 of the fuel inlet 12 opposite Common rails are hydraulically sealed, for example closed by a plug.
  • a plug At a Outer surface 16 of the common rail 10 are different Connection piece 18 arranged. Via the connecting piece 18, the fuel in the common rail 10 becomes the Injectors 20 transported. In another Connection piece 21 is screwed in a pressure sensor (not shown).
  • each Injector provided in a storage space 24 is arranged with a cylindrical interior and Outer contour.
  • the damping devices 22 serve the Pressure fluctuations caused by the high flow rates the injectors 20 due to multiple injections are achieved, especially negative pressures that starting from the injectors into the common rail 10 fight back, dampen.
  • Figure 2 now alternatively shows a structure for a Hydraulic system of a test bench, for one Flow test of an injector, which is also included here 20 is designated.
  • the hydraulic fluid passes through a feed (also referred to here as 12) in a measuring device such.
  • a measuring device such.
  • FIG. 3 shows a damping element as it is shown in FIG. 1 and 2 and designated by reference numeral 22 is on average, at rest.
  • the damper itself is while in a storage space 24, which is by a cylindrical Housing is formed, housed.
  • a storage space 24 which is by a cylindrical Housing is formed, housed.
  • On both sides of the Head ends of the cylindrical housing has Storage room 24 hydraulic connections 30.
  • the Flow direction is indicated by arrows that means that shown in the drawing on the right hydraulic connection leads to the injector 20.
  • the damper 22 has two throttle disks 32, which has three springs 34 ', 34 "and 34"' in the housing of the Storage space are stored and in terms of their axial Position in this are stabilized in a rest position.
  • the throttle disks 32 are passed through from both sides the springs 34 'to 34 "' held.
  • the spring constant of all three springs 34 'to 34 "' is set here so that Movements both against and in the direction of flow of the fluid equally easily through the throttle washers 32 can be carried out.
  • the throttle discs 32 have such a cross section that they are approximately the Adjusted contour of the cross section of the storage space 24 are. There is an opening in the middle of each throttle plate 32 36 provided through which fluid can flow.
  • Hydraulic fluid is now through the injectors 20th for example in a combustion chamber of a motor vehicle injected, this creates a vacuum wave that against the flow direction of the fluid in the Storage space 24 runs back.
  • the throttle disks 32 are created Pressure drop ⁇ p across the throttle plate 32, which arises because the fluid and therefore the pressure through the Throttle disks are prevented from continuing to flow, against which Direction of flow of the fluid deflected, the spring 34 "'is compressed and the springs 34" and 34' stretched become. Part of the pressure energy is thereby in Implemented spring energy.
  • the springs 34 give them in them stored energy back to the fuel, taking off the system moved back to the starting position.
  • the system this causes the fuel to start vibrating acts as a further damper between the throttle disks 32.
  • the single pressure vibration is hereby in one system superimposed vibrations implemented.
  • the damping system to the different, for example fuel systems be adjusted.

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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)
EP03015857A 2002-12-30 2003-07-11 Elément amortisseur pour un accumulateur haute pression Withdrawn EP1435455A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002161417 DE10261417A1 (de) 2002-12-30 2002-12-30 Hydraulikhochdruckspeicher
DE10261417 2002-12-30

Publications (1)

Publication Number Publication Date
EP1435455A1 true EP1435455A1 (fr) 2004-07-07

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EP03015857A Withdrawn EP1435455A1 (fr) 2002-12-30 2003-07-11 Elément amortisseur pour un accumulateur haute pression

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EP (1) EP1435455A1 (fr)
DE (1) DE10261417A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006045902A1 (fr) * 2004-10-29 2006-05-04 Wärtsilä Finland Oy Amortisseur des vibrations de pression pour systeme d'injection de carburant de moteur a combustion interne
WO2009024621A1 (fr) * 2007-08-23 2009-02-26 Continental Automotive Gmbh Système d'injection pour un moteur à combustion interne
WO2016166402A1 (fr) * 2015-04-16 2016-10-20 Wärtsilä Finland Oy Système d'injection de carburant pour un moteur à piston et procédé d'amortissement de variations de pression
JP2020143584A (ja) * 2019-03-04 2020-09-10 株式会社デンソー 圧力調整装置
US11713740B1 (en) * 2022-02-24 2023-08-01 Harbin Engineering University High-pressure common rail fuel injector capable of achieving highly stable injection based on throttling damping accommodating effect

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05149209A (ja) * 1991-11-27 1993-06-15 Nippondenso Co Ltd 燃料噴射装置
JPH06108946A (ja) * 1992-09-29 1994-04-19 Nippondenso Co Ltd 蓄圧式燃料噴射装置
EP0995902A2 (fr) * 1998-10-22 2000-04-26 Nippon Soken, Inc. Système d'alimentation en carburant pour amortir des variations de pression de carburant et procédé pour sa conception
US6230684B1 (en) * 1996-05-20 2001-05-15 Denso Corporation Fuel supply apparatus for direct injection type gasoline engine
JP2001207930A (ja) * 2000-01-26 2001-08-03 Denso Corp 蓄圧式燃料噴射装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05149209A (ja) * 1991-11-27 1993-06-15 Nippondenso Co Ltd 燃料噴射装置
JPH06108946A (ja) * 1992-09-29 1994-04-19 Nippondenso Co Ltd 蓄圧式燃料噴射装置
US6230684B1 (en) * 1996-05-20 2001-05-15 Denso Corporation Fuel supply apparatus for direct injection type gasoline engine
EP0995902A2 (fr) * 1998-10-22 2000-04-26 Nippon Soken, Inc. Système d'alimentation en carburant pour amortir des variations de pression de carburant et procédé pour sa conception
JP2001207930A (ja) * 2000-01-26 2001-08-03 Denso Corp 蓄圧式燃料噴射装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 544 (M - 1489) 30 September 1993 (1993-09-30) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 389 (M - 1642) 21 July 1994 (1994-07-21) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 25 12 April 2001 (2001-04-12) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006045902A1 (fr) * 2004-10-29 2006-05-04 Wärtsilä Finland Oy Amortisseur des vibrations de pression pour systeme d'injection de carburant de moteur a combustion interne
KR101132026B1 (ko) * 2004-10-29 2012-04-02 바르실라 핀랜드 오이 내연기관 연료분사 시스템용 압력진동 완충장치
WO2009024621A1 (fr) * 2007-08-23 2009-02-26 Continental Automotive Gmbh Système d'injection pour un moteur à combustion interne
WO2016166402A1 (fr) * 2015-04-16 2016-10-20 Wärtsilä Finland Oy Système d'injection de carburant pour un moteur à piston et procédé d'amortissement de variations de pression
JP2020143584A (ja) * 2019-03-04 2020-09-10 株式会社デンソー 圧力調整装置
CN111648894A (zh) * 2019-03-04 2020-09-11 株式会社电装 压力控制装置
US11713740B1 (en) * 2022-02-24 2023-08-01 Harbin Engineering University High-pressure common rail fuel injector capable of achieving highly stable injection based on throttling damping accommodating effect

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Publication number Publication date
DE10261417A1 (de) 2004-07-08

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