EP1119704B1 - Ensemble pompe pour la production d'une haute pression de carburant - Google Patents

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

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Publication number
EP1119704B1
EP1119704B1 EP99936424A EP99936424A EP1119704B1 EP 1119704 B1 EP1119704 B1 EP 1119704B1 EP 99936424 A EP99936424 A EP 99936424A EP 99936424 A EP99936424 A EP 99936424A EP 1119704 B1 EP1119704 B1 EP 1119704B1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure
valve
fuel
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.)
Expired - Lifetime
Application number
EP99936424A
Other languages
German (de)
English (en)
Other versions
EP1119704A1 (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

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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
    • 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 Genus of claim 1.
  • the pump arrangement according to the invention with the features of Claim 1 has the advantage that the High-pressure pump in the "zero delivery" operating state Fuel delivers because the differential pressure valve from Leakage current of the flow control valve is not overcome.
  • the suction valves of the high pressure pump can open what a very low opening pressure can be set again the even filling of the pump elements with Ensures fuel in the "partial filling" operating state. Opening pressure tolerances and changes over the service life suction valves set in this way have only a small number Influence on the equal delivery of the pump elements.
  • An embodiment of the invention is in the drawing based on a hydraulic circuit diagram for a pump arrangement schematically simplified for high-pressure fuel generation shown and in the following description explained.
  • the pump arrangement shown for High pressure fuel generation is for one in Fuel injection system used in internal combustion engines, in particular common rail injection system.
  • the Pump arrangement has a low-pressure pump 1, which on the suction side of a diesel fuel, for example containing fuel tank 2 is connected. Of the Low-pressure pump 1 goes to a delivery line 3 on the pressure side off, in which downstream one on Flow control valve 4 and a differential pressure valve 5 arranged are. Between the flow control valve 4 and the Differential pressure valve 5 goes from the delivery line 3 to Return tank 6 leading fuel tank 2 out. In the Return line 6, a throttle 7 is arranged.
  • the pump assembly also includes a high pressure pump 10 with three pump elements 11. These each have one Pump piston 12 and a to a displacement space 13 of the Pump element 11 connected suction valve 14 and Pressure valve 15 on.
  • the on a cam ring 16 by spring force supported pump pistons 12 are from an eccentric shaft 17 drivable, which like the low pressure pump 1 with the Internal combustion engine, not shown, is coupled.
  • the Delivery line 3 is on the downstream side Differential pressure valve 5 following branching to the Suction valves 14 of the pump elements 11 connected.
  • Of the Pressure valves 15 of the pump elements 11 go line branches a high-pressure fuel line 18, which leads to a High pressure fuel reservoir, not shown Fuel injection system leads.
  • the low pressure pump 1 and the high pressure pump 10 of the pump arrangement are each through Pressure relief valves, not shown, before overload protected.
  • the low pressure pump 1 from the fuel tank 2 Intake fuel is used by the Proportional solenoid valve designed flow control valve 4 quantified and by the open Differential pressure valve 5 delivered to the high pressure pump 10. This raises the pressure of the fuel delivered relatively high pressure level and gives this through the High-pressure fuel line 18 into the fuel accumulator, on the fuel injectors of the internal combustion engine are connected. A small part of the flow of the Low pressure pump 1 passes through the flow control valve 4 the throttled return line 6 back into the Fuel tank 2.
  • the fuel consumption of the Internal combustion dependent delivery of the high pressure pump 10 is set as with the flow control valve 4 Flow control referred to as suction throttling.
  • the low pressure pump 1 and the are of the type High pressure pump 10 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 unloaded check valve. Deviating from the representation of the suction valves 14 also as spring-loaded check valves. Essential to the invention, however, is that the suction valves 14 have a very low opening pressure.
  • the differential pressure valve 5 in the Delivery line 3 has an opening pressure that is greater than that of the suction valves 14.
  • the upstream of the Differential pressure valve 5 arranged in the delivery line 3 Flow control valve 4 is designed and has a slide type consequently, in its closed position, a fuel leakage flow, which after the flow control valve in the throttled return line 6 is derived without that Switch differential pressure valve to its open position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (2)

  1. Ensemble pompe pour générer du carburant à haute pression destiné à un système d'injection de carburant équipant un moteur à combustion interne, notamment un système d'injection à rampe commune, comprenant
    une pompe basse pression (1) aspirant le carburant d'un réservoir de carburant (2),
    une pompe haute pression (10) avec plusieurs éléments de pompe (11),
    une conduite d'alimentation (3) reliant la pompe basse pression (1) à la pompe haute pression (10), cette conduite étant reliée à une soupape d'aspiration (14) de l'élément de pompe respectif,
    une soupape de régulation de débit (4) du type coulissant installée dans la conduite d'alimentation (3),
    ainsi qu'une conduite de retour (6) reliée au côté de sortie de la soupape de régulation de débit (4),
    caractérisé en ce que
    la conduite de retour (6), entre la soupape de régulation de débit (4) et la pompe haute pression (10) est reliée à la conduite d'alimentation (3), et
    entre le branchement de la conduite de retour (6) et les soupapes d'aspiration (14) de la pompe à haute pression (10), dans la conduite d'alimentation (3), on a une soupape de différence de pression dont la pression d'ouverture est supérieure à celle de la soupape d'aspiration (14).
  2. Ensemble pompe selon la revendication 1,
    caractérisé en ce que
    la soupape d'aspiration (14) des éléments de pompe (11) est un clapet anti-retour non chargé ou équipé d'un ressort.
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
DE19846157 1998-10-07
DE19846157A DE19846157A1 (de) 1998-10-07 1998-10-07 Pumpenanordnung zur Kraftstoffhochdruckerzeugung
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 EP1119704A1 (fr) 2001-08-01
EP1119704B1 true 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
EP1657434B1 (fr) * 2004-11-12 2007-02-28 C.R.F. Società Consortile per Azioni Pompe à haute pression avec une installation pour régulation du débit pour un système d'injection de carburant
EP1674716B1 (fr) * 2004-12-23 2010-12-15 C.R.F. Società Consortile per Azioni Système d'injection de carburant comprenant une pompe à carburant à haute pression à débit variable
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
JP3747061B2 (ja) * 1993-11-08 2006-02-22 ツェーエルテー・コモン・レイル・テクノロジーズ・アクチェンゲゼルシャフト 注入比調整ポンプのための制御装置
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

Also Published As

Publication number Publication date
DE59903863D1 (de) 2003-01-30
EP1119704A1 (fr) 2001-08-01
US6581577B1 (en) 2003-06-24
DE19846157A1 (de) 2000-04-13
WO2000020753A1 (fr) 2000-04-13
JP2002526716A (ja) 2002-08-20

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