EP1217202A1 - Verfahren zur Dämpfung der Druckwelle in einer hydraulischen Leitung und Verwendung dieses Verfahrens in einer Common-Rail-Einspritzvorrichtung - Google Patents

Verfahren zur Dämpfung der Druckwelle in einer hydraulischen Leitung und Verwendung dieses Verfahrens in einer Common-Rail-Einspritzvorrichtung Download PDF

Info

Publication number: EP1217202A1
Authority: EP; European Patent Office
Prior art keywords: flow; restriction; pressure; injection; common rail
Prior art date: 2000-12-22
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.): Granted

Application number

EP01403248A

Other languages

English (en)

French (fr)

Other versions

EP1217202B1 (de

Inventor

Marc Bodin

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.)

Renault SAS

Original Assignee

Renault SA

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.)

2000-12-22

Filing date

2001-12-14

Publication date

2002-06-26

2001-12-14 Application filed by Renault SA filed Critical Renault SA

2002-06-26 Publication of EP1217202A1 publication Critical patent/EP1217202A1/de

2008-06-25 Application granted granted Critical

2008-06-25 Publication of EP1217202B1 publication Critical patent/EP1217202B1/de

2021-12-14 Anticipated expiration legal-status Critical

Status 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
- F02M55/04—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
- F02M55/025—Common rails

Definitions

the present invention relates to a depreciation method pressure waves in a hydraulic line, using a restriction creating dissipation in the line, as well as a device common rail injection for motor vehicle engine, implementing this process.
the flow of fuel injected is a function of the duration of piloting of the injector and of the pressure in the high pressure hydraulic circuit.
a mapping installed in the calculator allows you to calculate the driving time of the injector on the basis of the requested flow (acceleration sensor) and the applied pressure (pressure sensor on rail).
Another solution is a time correction activation of injectors during injection n ° 2 using an algorithm estimating the variations in the quantity injected, due to injection n ° 1.
the second mapping does not can be established that once the parameters of injection no.1 have been set (the pressure disturbance is a function of these parameters).
This solution is therefore by construction inactive during the development phase.
the only parameter that is taken into account is the presence or not of a first injection, but in no way other parameters influencing the injection, such as the amount of the first injection, the gap time between the two consecutive injections, etc.
this solution can only be used for a maximum of two consecutive injections.
Solutions of the second type are very difficult to implement. point, given the large number of parameters to take into account account to write the correction algorithm (geometric dimensions of the fuel system, injection pressure, temperature, quantity injected during the first injection, quantity injected during the second injection, time interval between the two injections, etc.). Moreover, these solutions are very sensitive to industrial dispersions of manufacturing.
the present invention aims to provide a solution to these interaction problems between consecutive injections, to cushion pressure waves generated by injection no.1 completely before starting injection number 2, without penalizing the injection pressure of the system.
the invention relates to a method for damping pressure waves in a hydraulic line, by use of a restriction with a more favorable characteristic than that of a restriction constituted by a calibrated nozzle.
a dissipator using a restriction operating in thin-film flow flow viscous, governed for example by Naviers-Stockes equations.
Such a dissipator is obtained by forcing the passage of the fluid between two opposite walls very close to each other compared to the length of flow.
a restriction having a height is therefore used very weak not only in relation to the length but also by in relation to the flow width.
Another aspect of the invention relates to positioning optimal of a dissipator in a hydraulic line, in this case in a common rail injection device for a vehicle engine automobile, comprising for each cylinder an injector connected by a feed tube to a common rail.
This device includes, in each feed tube, at the end of the ramp, a restriction operating in thin-film flow.
a calibrated nozzle whose installation, in a line hydraulic, is the easiest way to dampen the waves of pressure, in order to create dissipation (pressure drop) in the line, has a parabolic characteristic of pressure drop depending on the debit, according to formula (1) above (see Figure 1).
the thin layer condition relates the height h of the flow to the length 1 of the flow according to formula (2) above.
Figure 3 shows, for comparison, the characteristic parabolic pressure drop of a calibrated nozzle, in dashes, and the linear characteristic of pressure drop of a working restriction in thin-film flow, in solid lines.
pressure waves in a hydraulic line are accompanied by flow waves whose amplitudes are maximum in hydraulic line inlet (line flow belly).
FIG 4 there is shown schematically a complete hydraulic injection line with supply tube 1 high pressure ranging from a common rail 2 to an injector 3 comprising a rod filter 4.
FIG. 6 illustrates the effectiveness of the solution according to FIG. 4, showing that the damping of pressure variations at the inlet of the injector is much faster with the dissipator operating in thin-film flow at the outlet of common rail 2 (curve in dashes) than without sink (curve in solid line).
the solution according to the invention limits the amplitude of the waves of pressure, which increases the reliability of the fuel system.
the pressure in the high pressure circuit is more stable, which facilitates its regulation.
the rod filter 4 generally present at the input of diesel injectors, has a layer pressure drop characteristic thin and can therefore be used not as a filter but as thin film heatsink. Its transfer from its current position to the inlet of the injector towards the outlet of the common rail, possibly accompanied by a lowering of its filtration threshold to increase the pressure drop, allows you to benefit practically without additional cost advantages of the dissipator, object of the present invention.
Another solution is to use, in addition to the rod filter 4 in inlet of injector 3, a second rod filter at the outlet of the common rail, with a lowered filtration threshold.
Figure 8 compares the different efficiencies of a hydraulic line, one (in solid line) without dissipator, and the other (in dashes) with heatsink and non-return valve, as shown in Figure 7.

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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)

EP01403248A 2000-12-22 2001-12-14 Verfahren und Vorrichtung zur Dämpfung der Druckwelle eines Common-Rail-Einspritzsystems Expired - Lifetime EP1217202B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR0016936		2000-12-22
FR0016936A FR2818732B1 (fr)	2000-12-22	2000-12-22	Procede d'amortissement des ondes de pression dans une ligne hydraulique, et dispositif d'injection a rampe commune mettant en oeuvre ce procede

Publications (2)

Publication Number	Publication Date
EP1217202A1 true EP1217202A1 (de)	2002-06-26
EP1217202B1 EP1217202B1 (de)	2008-06-25

Family

ID=8858121

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP01403248A Expired - Lifetime EP1217202B1 (de)	2000-12-22	2001-12-14	Verfahren und Vorrichtung zur Dämpfung der Druckwelle eines Common-Rail-Einspritzsystems

Country Status (3)

Country	Link
EP (1)	EP1217202B1 (de)
DE (1)	DE60134528D1 (de)
FR (1)	FR2818732B1 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1300584A1 (de) *	2001-10-04	2003-04-09	Renault S.A.	Kraftstoffversorgungsanlage für Brennkraftmaschinen
WO2004033893A1 (de) *	2002-10-04	2004-04-22	Robert Bosch Gmbh	Einrichtung zur unterdrückung von druckwellen an speichereinspritzsystemen
FR2848256A1 (fr) *	2002-12-04	2004-06-11	Renault Sa	Dispositif d'amortissement des ondes de pression pour systeme d'injection de carburant
FR2848257A1 (fr) *	2002-12-04	2004-06-11	Renault Sa	Dispositif d'amortissement des ondes de pression pour systeme d'injection de carburant
WO2004076846A1 (de) *	2003-02-25	2004-09-10	Robert Bosch Gmbh	Hochdruckleitung für eine kraftstoffeinspritzanlage
EP1398496A3 (de) *	2002-09-09	2005-04-20	Robert Bosch Gmbh	Hochdruckleitung für Kraftstoffeinspritzsysteme von Brennkraftmaschinen
EP1614894A1 (de)	2004-07-07	2006-01-11	Renault s.a.s.	Common Rail Einspritzsystem mit Druckwellendämpfungseinrichtung
FR2886350A1 (fr) *	2005-05-26	2006-12-01	Renault Sas	Procede d'amortissement d'ondes de pression et dispositif d'injection
FR2895033A3 (fr)	2005-12-21	2007-06-22	Renault Sas	Dispositif d'injection pour un moteur a combustion interne
AT501573B1 (de) *	2006-06-13	2008-05-15	Avl List Gmbh	Hydraulische vorrichtung mit zumindest einem druckspeicher
JP2009540196A (ja) *	2006-06-13	2009-11-19	ロバートボッシュゲーエムベーハー	燃料を内燃機関の燃焼室内に噴射するための装置
WO2012058703A1 (de)	2010-11-02	2012-05-10	Robert Bosch Gmbh	Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2848258B1 (fr)	2002-12-04	2006-06-23	Renault Sa	Dispositif d'amortissement des ondes de pression pour systeme d'injection de carburant
CN105840373B (zh) *	2016-03-24	2019-06-25	中国北方发动机研究所(天津)	一种控制喷油“水击”压力波的装置

Citations (7)

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US4003405A (en) *	1975-03-26	1977-01-18	Canadian Patents And Development Limited	Apparatus for regulating the flow rate of a fluid
US4625919A (en) *	1983-12-02	1986-12-02	Hitachi, Ltd.	Electromagnetic fuel injection valve
DE3822773A1 (de) *	1988-07-01	1990-01-04	Howaldtswerke Deutsche Werft	Einbauteil zur turbulenzdaempfung in rohrleitungen
US5297523A (en) *	1993-02-26	1994-03-29	Caterpillar Inc.	Tuned actuating fluid inlet manifold for a hydraulically-actuated fuel injection system
EP0780569A1 (de) *	1995-12-19	1997-06-25	Nippon Soken, Inc.	Speicherkraftstoffeinspritzvorrichtung
US5780748A (en) *	1997-01-29	1998-07-14	Hewlett-Packard Company	Flow device having parallel flow surfaces which move toward and away from one another to adjust the flow channel in proportion to applied force
US5979945A (en) *	1996-12-07	1999-11-09	Usuikokusai Sangyo Kaisha Ltd.	Common rail

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DE1084086B (de) *	1955-11-03	1960-06-23	Maschf Augsburg Nuernberg Ag	Einrichtung zum besseren Zerstaeuben von schweren Brennstoffen bei Brennkraftmaschinen
DE19640085C2 (de) *	1996-09-28	2001-10-25	Orange Gmbh	Sperrventil zur Durchflußmengenbegrenzung
DE19739810C1 (de) *	1997-09-10	1998-12-03	Siemens Ag	Einspritzsystem für eine Brennkraftmaschine
US6237570B1 (en) *	1997-10-09	2001-05-29	Denso Corporation	Accumulator fuel injection apparatus
DE10006658B4 (de) *	2000-02-15	2004-08-26	Siemens Ag	Einspritzanlage

2000
- 2000-12-22 FR FR0016936A patent/FR2818732B1/fr not_active Expired - Fee Related
2001
- 2001-12-14 EP EP01403248A patent/EP1217202B1/de not_active Expired - Lifetime
- 2001-12-14 DE DE60134528T patent/DE60134528D1/de not_active Expired - Lifetime

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4003405A (en) *	1975-03-26	1977-01-18	Canadian Patents And Development Limited	Apparatus for regulating the flow rate of a fluid
US4625919A (en) *	1983-12-02	1986-12-02	Hitachi, Ltd.	Electromagnetic fuel injection valve
DE3822773A1 (de) *	1988-07-01	1990-01-04	Howaldtswerke Deutsche Werft	Einbauteil zur turbulenzdaempfung in rohrleitungen
US5297523A (en) *	1993-02-26	1994-03-29	Caterpillar Inc.	Tuned actuating fluid inlet manifold for a hydraulically-actuated fuel injection system
EP0780569A1 (de) *	1995-12-19	1997-06-25	Nippon Soken, Inc.	Speicherkraftstoffeinspritzvorrichtung
US5979945A (en) *	1996-12-07	1999-11-09	Usuikokusai Sangyo Kaisha Ltd.	Common rail
US5780748A (en) *	1997-01-29	1998-07-14	Hewlett-Packard Company	Flow device having parallel flow surfaces which move toward and away from one another to adjust the flow channel in proportion to applied force

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1300584A1 (de) *	2001-10-04	2003-04-09	Renault S.A.	Kraftstoffversorgungsanlage für Brennkraftmaschinen
EP1398496A3 (de) *	2002-09-09	2005-04-20	Robert Bosch Gmbh	Hochdruckleitung für Kraftstoffeinspritzsysteme von Brennkraftmaschinen
WO2004033893A1 (de) *	2002-10-04	2004-04-22	Robert Bosch Gmbh	Einrichtung zur unterdrückung von druckwellen an speichereinspritzsystemen
FR2848256A1 (fr) *	2002-12-04	2004-06-11	Renault Sa	Dispositif d'amortissement des ondes de pression pour systeme d'injection de carburant
FR2848257A1 (fr) *	2002-12-04	2004-06-11	Renault Sa	Dispositif d'amortissement des ondes de pression pour systeme d'injection de carburant
CN1745243B (zh) *	2003-02-25	2013-05-01	罗伯特·博世有限公司	用于燃料喷射装置的高压管道
WO2004076846A1 (de) *	2003-02-25	2004-09-10	Robert Bosch Gmbh	Hochdruckleitung für eine kraftstoffeinspritzanlage
EP1614894A1 (de)	2004-07-07	2006-01-11	Renault s.a.s.	Common Rail Einspritzsystem mit Druckwellendämpfungseinrichtung
FR2872865A1 (fr) *	2004-07-07	2006-01-13	Renault Sas	Dispositif d'injection a rampe commune avec amortissement des ondes de pression
FR2886350A1 (fr) *	2005-05-26	2006-12-01	Renault Sas	Procede d'amortissement d'ondes de pression et dispositif d'injection
FR2895033A3 (fr)	2005-12-21	2007-06-22	Renault Sas	Dispositif d'injection pour un moteur a combustion interne
AT501573B1 (de) *	2006-06-13	2008-05-15	Avl List Gmbh	Hydraulische vorrichtung mit zumindest einem druckspeicher
JP2009540196A (ja) *	2006-06-13	2009-11-19	ロバートボッシュゲーエムベーハー	燃料を内燃機関の燃焼室内に噴射するための装置
WO2012058703A1 (de)	2010-11-02	2012-05-10	Robert Bosch Gmbh	Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
US9447720B2 (en)	2010-11-02	2016-09-20	Robert Bosch Gmbh	Device for injecting fuel into the combustion chamber of an internal combustion engine

Also Published As

Publication number	Publication date
EP1217202B1 (de)	2008-06-25
FR2818732B1 (fr)	2004-05-28
FR2818732A1 (fr)	2002-06-28
DE60134528D1 (de)	2008-08-07

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2002-08-21	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: RENAULT S.A.S.
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2008-01-23	RTI1	Title (correction)	Free format text: METHOD AND APPARATUS OF DAMPING PRESSURE WAVES IN A COMMON RAIL INJECTION SYSTEM
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Publication	Publication Date	Title
EP1217202A1 (de)	2002-06-26	Verfahren zur Dämpfung der Druckwelle in einer hydraulischen Leitung und Verwendung dieses Verfahrens in einer Common-Rail-Einspritzvorrichtung
FR2727470A1 (fr)	1996-05-31	Ensemble a clapet pour circuit de carburant sans retour
EP0834650B1 (de)	2003-03-05	Verfahren zur Steuerung der Kraftstoffeinspritzmenge für einen Dieselmotor
FR2786225A1 (fr)	2000-05-26	Systeme d'injection de carburant sous haute pression dans un moteur a combustion interne a injection directe
CA2461353A1 (fr)	2004-09-25	Dispositif d'injection d'air de refroidissement dans un rotor de turbine
EP1674699B1 (de)	2007-08-15	System zum Auslösen der Regeneration in einem Abgasnachbehandlungssystem mit einem NOx-Speicher
FR2782749A1 (fr)	2000-03-03	Procede et dispositif de reglage de la pression entre une pompe de mise en circulation initiale et une pompe haute pression d'un systeme d'injection
WO2011110760A2 (fr)	2011-09-15	Procede de regulation de la temperature de regeneration d'un filtre a particules
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EP1400679B1 (de)	2005-12-28	Steuereinrichtung um einen Kraftfahrzeug-Dieselmotor zu betrieben
FR2891876A3 (fr)	2007-04-13	Dispositif d'injection a rampe commune pour moteur a combustion interne et injection de carburant.
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WO1997015756A1 (fr)	1997-05-01	Systeme d'injection de carburant dans un moteur a combustion interne
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