EP1119704A1 - Pumpenanordnung zur kraftstoffhochdruckerzeugung - Google Patents
Pumpenanordnung zur kraftstoffhochdruckerzeugungInfo
- 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
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
Description
Claims
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 (de) | 1998-10-07 | 1999-06-08 | Pumpenanordnung zur kraftstoffhochdruckerzeugung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1119704A1 true EP1119704A1 (de) | 2001-08-01 |
EP1119704B1 EP1119704B1 (de) | 2002-12-18 |
Family
ID=7883677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99936424A Expired - Lifetime EP1119704B1 (de) | 1998-10-07 | 1999-06-08 | Pumpenanordnung zur kraftstoffhochdruckerzeugung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6581577B1 (de) |
EP (1) | EP1119704B1 (de) |
JP (1) | JP2002526716A (de) |
DE (2) | DE19846157A1 (de) |
WO (1) | WO2000020753A1 (de) |
Families Citing this family (24)
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 |
WO2004046534A1 (en) * | 2002-11-18 | 2004-06-03 | 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. |
DE602004030597D1 (de) * | 2004-12-23 | 2011-01-27 | 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 |
EP1865193B1 (de) * | 2006-06-09 | 2010-11-03 | C.R.F. Società Consortile per Azioni | 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)
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 |
EP0678166B1 (de) * | 1993-11-08 | 1998-08-12 | SIG Schweizerische Industrie-Gesellschaft | Steuereinrichtung für eine füllgrad-verstellpumpe |
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 |
-
1998
- 1998-10-07 DE DE19846157A patent/DE19846157A1/de not_active Withdrawn
-
1999
- 1999-06-08 JP JP2000574832A patent/JP2002526716A/ja active Pending
- 1999-06-08 US US09/786,922 patent/US6581577B1/en not_active Expired - Fee Related
- 1999-06-08 EP EP99936424A patent/EP1119704B1/de not_active Expired - Lifetime
- 1999-06-08 WO PCT/DE1999/001664 patent/WO2000020753A1/de active IP Right Grant
- 1999-06-08 DE DE59903863T patent/DE59903863D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0020753A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59903863D1 (de) | 2003-01-30 |
EP1119704B1 (de) | 2002-12-18 |
US6581577B1 (en) | 2003-06-24 |
DE19846157A1 (de) | 2000-04-13 |
JP2002526716A (ja) | 2002-08-20 |
WO2000020753A1 (de) | 2000-04-13 |
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