EP1119704A1 - Ensemble pompe pour la production d'une haute pression de carburant - Google Patents

Ensemble pompe pour la production d'une haute pression de carburant

Info

Publication number
EP1119704A1
EP1119704A1 EP99936424A EP99936424A EP1119704A1 EP 1119704 A1 EP1119704 A1 EP 1119704A1 EP 99936424 A EP99936424 A EP 99936424A EP 99936424 A EP99936424 A EP 99936424A EP 1119704 A1 EP1119704 A1 EP 1119704A1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure
fuel
valve
pressure pump
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.)
Granted
Application number
EP99936424A
Other languages
German (de)
English (en)
Other versions
EP1119704B1 (fr
Inventor
Gerhard Geyer
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 EP1119704A1 publication Critical patent/EP1119704A1/fr
Application granted granted Critical
Publication of EP1119704B1 publication Critical patent/EP1119704B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • F04B49/246—Bypassing by keeping open the outlet valve

Definitions

  • the invention relates to a pump arrangement according to the preamble of patent claim 1.
  • Such a pump arrangement is already known (DE 195 49 108 AI), in which the flow control valve, in its position blocking the flow to the high-pressure pump, controls the fuel supplied by the low-pressure pump to the fuel tank.
  • a flow control valve designed as a slide valve has a more or less large leakage current due to its design.
  • the suction of the leakage current through one or more of the pump elements of the high-pressure pump should be avoided.
  • High-pressure pump in the "zero delivery" operating state does not deliver fuel because the differential pressure valve is not overcome by the leakage current of the flow control valve.
  • the suction valves of the high-pressure pump can be set to a very low opening pressure, which in turn ensures that the pump elements are evenly filled with fuel in the "partial filling" operating state "ensures. Opening pressure tolerances and changes over the lifespan of suction valves set in this way have only a minor influence on the equal delivery of the pump elements.
  • An embodiment of the invention is shown schematically simplified in the drawing using a hydraulic circuit diagram for a pump arrangement for generating high fuel pressure and is explained in more detail in the following description.
  • High-pressure fuel generation is intended for a fuel injection system used in internal combustion engines, in particular a common rail injection system.
  • the pump arrangement has a low-pressure pump 1, which is connected on the suction side to a diesel fuel, for example containing fuel tank 2 is connected.
  • a delivery line 3 extends from the low-pressure pump 1 on the pressure side, in which a flow control valve 4 and a differential pressure valve 5 are arranged in succession downstream. Between the flow control valve 4 and the
  • Differential pressure valve 5 extends from the delivery line 3 to the return line 6 leading to the fuel tank 2.
  • a throttle 7 is arranged in the return line 6.
  • the pump arrangement also includes a high-pressure pump 10 with three pump elements 11. These each have a pump piston 12 and a suction valve 14 and pressure valve 15 connected to a displacement chamber 13 of the pump element 11.
  • the delivery line 3 is connected to the suction valves 14 of the pump elements 11 after a branch following the outflow side of the differential pressure valve 5.
  • Line branches of a high-pressure fuel line 18 extend from the pressure valves 15 of the pump elements 11 and lead to a high-pressure fuel reservoir (not shown) of the fuel injection system.
  • the low-pressure pump 1 and the high-pressure pump 10 of the pump arrangement are each protected against overload by pressure relief valves, not shown.
  • the fuel drawn from the fuel tank 2 by the low-pressure pump 1 is used by the low-pressure pump 1 .
  • the low-pressure pump 1 and the high-pressure pump 10 are constant pumps.
  • the suction valves 14 of the pump elements 11 of the high-pressure pump 10 are, as shown schematically in simplified form, as an unloaded check valve. Deviating from the illustration, the suction valves 14 can also be designed as spring-loaded check valves. It is essential to the invention that the suction valves 14 are set to a very low opening pressure.
  • the differential pressure valve 5 in the delivery line 3 has an opening pressure which is greater than that of the suction valves 14.
  • the flow control valve 4 arranged upstream of the differential pressure valve 5 in the delivery line 3 is designed as a slide valve and consequently has a fuel leakage flow in its closed position, which follows the flow control valve in the throttled return line 6 is derived without switching the differential pressure valve to its open position.

Abstract

Ensemble pompe qui comporte une pompe basse pression (1) aspirant du carburant se trouvant dans un réservoir (2) de carburant et une pompe haute pression (10) dotée de plusieurs éléments (11). Une conduite de refoulement (3) relie la pompe basse pression (1) à une soupape d'aspiration (14) de chaque élément (11) de pompe. Une soupape de régulation (4) de type tiroir et, du côté sortie de cette dernière, une soupape (5) de pression différentielle sont placées dans la conduite de refoulement (3). Une conduite de retour (6) conduisant au réservoir (2) de carburant est branchée entre les deux soupapes (4, 5). La soupape (5) de pression différentielle comporte une pression d'ouverture qui est supérieure à celle des soupapes d'aspiration (14). Ainsi, en cas de refoulement nul de la pompe haute pression (10), l'aspiration de carburant par les éléments (11) de pompe est évitée, tandis qu'en cas de fonctionnement de la pompe haute pression (10) avec remplissage partiel, un remplissage largement uniforme des éléments (11) de pompe avec du carburant est par contre obtenu. Ledit ensemble pompe peut être utilisé dans des systèmes d'injection de carburant pour moteurs à combustion interne, en particulier dans des systèmes d'injection à rampe commune.
EP99936424A 1998-10-07 1999-06-08 Ensemble pompe pour la production d'une haute pression de carburant Expired - Lifetime EP1119704B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19846157A DE19846157A1 (de) 1998-10-07 1998-10-07 Pumpenanordnung zur Kraftstoffhochdruckerzeugung
DE19846157 1998-10-07
PCT/DE1999/001664 WO2000020753A1 (fr) 1998-10-07 1999-06-08 Ensemble pompe pour la production d'une haute pression de carburant

Publications (2)

Publication Number Publication Date
EP1119704A1 true EP1119704A1 (fr) 2001-08-01
EP1119704B1 EP1119704B1 (fr) 2002-12-18

Family

ID=7883677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99936424A Expired - Lifetime EP1119704B1 (fr) 1998-10-07 1999-06-08 Ensemble pompe pour la production d'une haute pression de carburant

Country Status (5)

Country Link
US (1) US6581577B1 (fr)
EP (1) EP1119704B1 (fr)
JP (1) JP2002526716A (fr)
DE (2) DE19846157A1 (fr)
WO (1) WO2000020753A1 (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954695A1 (de) * 1999-11-13 2001-05-23 Bosch Gmbh Robert Kraftstoffeinspritzsystem
IT1310753B1 (it) * 1999-11-30 2002-02-22 Elasis Sistema Ricerca Fiat Sistema di regolazione della portata di una pompa ad alta pressioneper l'alimentazione di combustibile ad un motore ad iniezione.
JP2001221118A (ja) * 2000-02-07 2001-08-17 Bosch Automotive Systems Corp 燃料噴射装置
DE10057244A1 (de) * 2000-11-18 2002-06-06 Bosch Gmbh Robert Kraftstoffeinspritzanlage für Brennkraftmaschinen mit verbessertem Startverhalten
DE10100700C1 (de) * 2001-01-10 2002-08-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem mit Druckregelung in der Rücklaufleitung
DE10139054C1 (de) * 2001-08-08 2003-01-30 Bosch Gmbh Robert Verfahren, Computerprogramm, Steuer- und/oder Regelgerät sowie Kraftstoffsystem für eine Brennkraftmaschine, insbesondere mit Direkteinspritzung
DE10154133C1 (de) * 2001-11-03 2003-02-13 Bosch Gmbh Robert Kraftstoffsystem
JP2005299683A (ja) * 2001-11-27 2005-10-27 Bosch Corp 液体の流量制御弁および可動子のためのアンカー
DE10205187A1 (de) * 2002-02-08 2003-08-21 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10218022A1 (de) * 2002-04-23 2003-11-06 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10237586A1 (de) * 2002-08-16 2004-02-26 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
US6755625B2 (en) * 2002-10-07 2004-06-29 Robert H. Breeden Inlet throttle valve
DE10247564A1 (de) * 2002-10-11 2004-04-22 Robert Bosch Gmbh Verfahren zum Betreiben eines Common-Rail-Kraftstoffeinspritzsystems für Brennkraftmaschinen
US20040101420A1 (en) * 2002-11-18 2004-05-27 Breeden Robert H. Solenoid regulated pump assembly
JP2005188432A (ja) * 2003-12-26 2005-07-14 Bosch Automotive Systems Corp 燃料供給装置
ES2280931T3 (es) * 2004-11-12 2007-09-16 C.R.F. Societa' Consortile Per Azioni Bomba de alta presion con un dispositivo de regulacion de caudal para un sistema de inyeccion de combustible.
ATE491885T1 (de) * 2004-12-23 2011-01-15 Fiat Ricerche Kraftstoffeinspritzeinrichtung mit hochdruckkraftstoffpumpe mit verändlicher durchflussmenge
DE102005033638A1 (de) * 2005-07-19 2007-01-25 Robert Bosch Gmbh Kraftstoff-Fördereinrichtung, insbesondere für eine Brennkraftmaschine
CN1786457B (zh) * 2005-09-19 2011-06-22 童维友 预置高压分配式燃油喷射泵
DE602006017981D1 (de) * 2006-06-09 2010-12-16 Fiat Ricerche Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE102006037174A1 (de) * 2006-08-09 2008-02-14 Robert Bosch Gmbh Vorrichtung und Verfahren zur Regelung eines Kraftstoffvolumenstroms in einem Niederdruckkreislaufsystem für eine Verbrennungskraftmaschine
DE102010043439A1 (de) * 2010-11-05 2012-05-10 Robert Bosch Gmbh Kraftstoffeinspritzsystem einer Brennkraftmaschine
JP5664539B2 (ja) * 2011-12-21 2015-02-04 株式会社デンソー 燃料供給システムの制御装置
DE102012107764A1 (de) 2012-08-23 2014-04-10 Kendrion (Villingen) Gmbh Common-Rail-System

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310049A1 (de) * 1983-03-19 1984-09-20 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzeinrichtung zur einspritzung einer aus mindestens zwei komponenten bestehenden kraftstoffmischung
US5701873A (en) * 1993-11-08 1997-12-30 Eidgenoessische Technische Hochschule Laboratorium Fuer Verbrennungsmotoren Und Verbrennungstechnik Control device for a filling-ratio adjusting pump
DE19549108A1 (de) * 1995-12-29 1997-07-03 Bosch Gmbh Robert System zur Kraftstoffhochdruckerzeugung für ein in Brennkraftmaschinen eingesetztes Kraftstoffeinspritzsystem
DE19612412B4 (de) * 1996-03-28 2006-07-06 Siemens Ag Regelung für ein Druckfluid-Versorgungssystem, insbesondere für den Hochdruck in einem Kraftstoff-Einspritzsystem
DE19630938C5 (de) * 1996-07-31 2008-02-14 Siemens Ag Kraftstoffzuleitung mit einem Volumenstromregelventil und Volumenstromregelventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0020753A1 *

Also Published As

Publication number Publication date
DE59903863D1 (de) 2003-01-30
JP2002526716A (ja) 2002-08-20
EP1119704B1 (fr) 2002-12-18
DE19846157A1 (de) 2000-04-13
WO2000020753A1 (fr) 2000-04-13
US6581577B1 (en) 2003-06-24

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