EP1088984A2 - Einspritzanlage für eine Brennkraftmaschine - Google Patents
Einspritzanlage für eine Brennkraftmaschine Download PDFInfo
- Publication number
- EP1088984A2 EP1088984A2 EP00121483A EP00121483A EP1088984A2 EP 1088984 A2 EP1088984 A2 EP 1088984A2 EP 00121483 A EP00121483 A EP 00121483A EP 00121483 A EP00121483 A EP 00121483A EP 1088984 A2 EP1088984 A2 EP 1088984A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection system
- fuel
- pump
- line
- 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
Images
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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock
-
- 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
- F02M55/007—Venting means
-
- 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
Definitions
- the invention relates to an injection system for an internal combustion engine according to the preamble of claim 1.
- Known injection systems therefore have conventionally a vent line on the fuel line in the Low pressure area between the pre-feed pump and the high pressure pump branches off, one in the vent line Throttle or check valve is arranged to prevent that after bleeding the injection system in normal Operation Fuel escapes through the vent line.
- a check valve in the vent line has the disadvantage that a certain minimum pressure is always built up must be before the check valve the vent line opens what at the relatively low speeds when starting the engine with the usual pumps used is problematic.
- the invention is therefore based on the object of an injection system to create for an internal combustion engine that at the lowest possible fuel loss in normal operation
- the injection system can be vented as quickly as possible.
- This task is - starting from the one described above known injection system - according to the preamble of the claim 1 by the characterizing features of claim 1 solved.
- the invention comprises the general technical teaching for Ventilation of the injection system to provide a ventilation line, the downstream of the pump from the fuel line branches off, a filter element in the ventilation line is arranged, which is essentially impermeable to fuel and is essentially permeable to gas.
- a membrane filter is used for this purpose, for example from the aforementioned international patent application WO 99/0541 is described, so that on a detailed Description of such a membrane filter is dispensed with and in this respect to the aforementioned patent application is referred.
- the injection system has a Low pressure pump and a high pressure pump, the Vent line in the low pressure area between the low pressure pump and branches off the high pressure pump.
- the vent line branches however, downstream behind the high pressure pump from, which also enables the high pressure area to be vented.
- a pressure accumulator (English: common rail) preferably branches the vent line directly from the accumulator.
- this variant is in the vent line before and / or a pressure cut-off valve is arranged after the filter element, that the vent line only up to a predetermined maximum Fuel pressure releases, whereas the vent line closed at normal injection pressure to prevent that which is arranged in the vent line Filter element due to the relatively high injection pressures in normal operation is damaged.
- the injection system shown in Figure 1 has a prefeed pump 1 on by a drive shaft 2 mechanically is driven and fuel via a fuel filter 3 and two check valves 4.1, 4.2 from a fuel tank 5 promotes.
- the pre-feed pump is on the output side with a Pre-pressure control valve 6 connected when a predetermined fuel pressure on the output side of the pre-feed pump 1 a part of the delivered by the pre-feed pump 1 Branches off and flows to the intake side of the Feed pump 1 returns so that the fuel pressure the output side of the pre-feed pump 1 largely in normal operation is kept constant.
- the feed pump 1 is on the output side via a Fuel line 7 connected to a high pressure pump 8, the to inject the fuel into the combustion chambers of the Internal combustion engine required relatively high injection pressure generated.
- the high-pressure pump 8 is on the output side connected to a pressure accumulator 9 (English: common rail) the four injectors 10.1 to 10.4 the fuel for injection into the individual combustion chambers of the internal combustion engine Respectively.
- the individual injectors 10.1 to 10.4 are again connected to a common return line 11 through the excess fuel back into the fuel tank 5 to be led.
- a High pressure control valve 12 On the output side of the high pressure pump 8 is still a High pressure control valve 12 arranged when exceeded a predetermined maximum fuel pressure on the output side the high pressure pump 8 a part of the high pressure pump 8 fuel flow delivered via a return line 13 leads back into the fuel tank 5, wherein in the Return line 13, a check valve 14 is arranged.
- the injection system shown has a pressure sensor 15, which measures the pressure in the pressure accumulator 9 and in a voltage signal converts that to an electronic control unit 16 is supplied, the electronic control unit 16 depending on the measured fuel pressure in the Pressure accumulator controls the high pressure control valve 12.
- the control unit 16 controls a volume flow control valve 17 on that in the fuel line 7 between the prefeed pump 1 and the high pressure pump 8 is arranged.
- the fuel used for flushing purposes then leaves the housing of the high pressure pump 8 again via a return line 18, which in the return line 13th opens, so that the fuel used for flushing purposes is then returned to the fuel tank 5.
- a throttle 19 is first arranged to the flushing line limit the fuel flow that branches off via the flushing line.
- the injection system shown therefore has a vent line from the fuel line 7 branches off downstream of the feed pump 1 and on the outlet side opens into the housing of the high-pressure pump 8.
- a membrane filter 21 is arranged in the vent line, which is largely impermeable to fuel, but air lets through almost unhindered.
- the in the low pressure area between the feed pump 1 and the volume flow control valve 17 air is therefore possibly from the pre-feed pump via the ventilation line through the membrane filter 21 pumped into the housing of the high pressure pump 8 and then via the return lines 18 and 13 back into the Fuel tank led.
- In the vent line are in front and check valves 22 behind the membrane filter 21 or 23 arranged to prevent that when the System by the height difference between the tank 5 and the pump air via the vent line and the membrane filter 21 air is sucked in.
- the low pressure area is vented relatively quickly, by the air in the low pressure area in the housing of the high pressure pump 8 is pumped and then gets back into the fuel tank.
- FIG. 2 The exemplary embodiment shown in FIG. 2 is largely correct with that described above and shown in Figure 1 Embodiment match, so that in the following Avoid repetition of the description of FIG. 1 is referenced and also uses the same reference numerals become.
- the difference of the embodiment shown in Figure 2 compared to the embodiment shown in Figure 1 consists essentially in that the vent line not in the housing of the high pressure pump 8, but in the return line 13 opens, so that in the low pressure area between the pre-feed pump 1 and the high pressure pump 8 air is returned directly to the fuel tank 5 becomes. This will cause an accumulation of air in the housing the high pressure pump 8 avoided.
- FIG. 3 The exemplary embodiment shown in FIG. 3 is also correct largely corresponds to the exemplary embodiment according to FIG. 1, so that in this regard to avoid repetitions reference is made to the description of FIG. 1 and the same Reference numerals are used.
- the embodiment shown in Figure 4 differs different from the exemplary embodiments described above essentially in that the vent line on the outlet side opens into the environment, so that in the low pressure range air is released directly to the environment.
- an activated carbon filter 24 is arranged.
- FIG. 5 The exemplary embodiment shown in FIG. 5 is also correct largely with the embodiment shown in Figure 1 agree, so that in the following to avoid Repetitions referred to the relevant description becomes. It should only be noted that in Figure 5 some Components that have been omitted for the representation of the Invention are of minor importance.
- the invention is not limited in its execution the preferred embodiments given above. Rather, a number of variants are conceivable, which of the solution shown, even if fundamentally different Makes use of explanations.
Abstract
Description
- Figur 1
- eine Einspritzanlage für eine Brennkraftmaschine mit einer Entlüftung des Niederdruckbereichs, wobei die Entlüftungsleitung in das Gehäuse der Hochdruckpumpe mündet;
- Figur 2
- eine Einspritzanlage mit einer Entlüftung des Niederdruckbereichs, wobei die Entlüftungsleitung in die Kraftstoffrückführung mündet;
- Figur 3
- eine Einspritzanlage mit einer Entlüftung des Niederdruckbereichs zwischen dem Volumenstrom-Regelventil und der Hochdruckpumpe, wobei die Entlüftungsleitung in die Kraftstoffrückführung mündet;
- Figur 4
- eine Einspritzanlage mit einer Entlüftung des Niederdruckbereichs zwischen dem Volumenstrom-Regelventil und der Hochdruckpumpe, wobei die Entlüftungsleitung in die Umgebung frei mündet, sowie
- Figur 5
- eine Einspritzanlage mit einer Entlüftung des Hochdruckbereichs.
Claims (14)
- Einspritzanlage für eine Brennkraftmaschine, miteiner Pumpe (1) zur Förderung von Kraftstoff,einer der Pumpe stromabwärts nachgeordneten Kraftstoffleitung (7) zur Weiterleitung mindestens eines Teils des von der Pumpe (1) geförderten Kraftstoffs zu mindestens einem Injektor (10.1 bis 10.4) gekennzeichnet durchein Filterelement (21) zur Entfernung von Gas aus der Einspritzanlage, wobei das Filterelement (21) für den Kraftstoff im wesentlich undurchlässig und für Gas im wesentlichen durchlässig ist, wobeivon der Kraftstoffleitung (7) stromabwärts nach der Pumpe (1) eine Entlüftungsleitung abzweigt, in der das Filterelement (21) angeordnet ist.
- Einspritzanlage nach Anspruch 1,
dadurch gekennzeichnet,daß das Filterelement (21) eine Membran aufweist, die für den Kraftstoff im wesentlich undurchlässig und für Gas im wesentlichen durchlässig ist. - Einspritzanlage nach Anspruch 1 oder 2,
dadurch gekennzeichnet,daß die Pumpe (1) eine Niederdruckpumpe ist, der stromabwärts eine Hochdruckpumpe (8) nachgeordnet ist, wobei die Entlüftungsleitung zwischen der Niederdruckpumpe (1) und der Hochdruckpumpe (8) abzweigt. - Einspritzanlage nach Anspruch 1 oder 2,
dadurch gekennzeichnet,daß die Pumpe (1) eine Niederdruckpumpe ist, der stromabwärts eine Hochdruckpumpe (8) nachgeordnet ist, wobei die Entlüftungsleitung im Hochdruckbereich stromabwärts hinter der Hochdruckpumpe (8) abzweigt. - Einspritzanlage nach Anspruch 4,
dadurch gekennzeichnet,daß die Hochdruckpumpe (8) ausgangsseitig mit einem Druckspeicher (9) verbunden ist, wobei die Entlüftungsleitung von dem Druckspeicher (9) abzweigt. - Einspritzanlage nach Anspruch 4 oder 5,
dadurch gekennzeichnet,daß in der Entlüftungsleitung stromaufwärts vor dem Filterelement ein Druckabschaltventil (25) angeordnet ist, um das Filterelement vor einem Überdruck zu schützen. - Einspritzanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß die Entlüftungsleitung ausgangsseitig in das Gehäuse der Hochdruckpumpe (8) mündet. - Einspritzanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß die Entlüftungsleitung ausgangsseitig direkt oder indirekt in einen Kraftstofftank (5) mündet. - Einspritzanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß die Entlüftungsleitung ausgangsseitig in den Ansaugbereich der Brennkraftmaschine mündet. - Einspritzanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß die Entlüftungsleitung ausgangsseitig frei endet. - Einspritzanlage nach Anspruch 10,
dadurch gekennzeichnet,daß in der Entlüftungsleitung ein Aktivkohlefilter (24) angeordnet ist, um die Abgabe von Kraftstoffgasen an die Umgebung zu verhindern. - Einspritzanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß aus dem Gehäuse der Hochdruckpumpe (8) eine Rückführleitung (18) herausgeführt ist, wobei in der Rückführleitung (18) ein Rückschlagventil angeordnet ist. - Einspritzanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß in der Entlüftungsleitung vor und/oder nach dem Filterelement ein Rückschlagventil (22, 23) angeordnet ist. - Einspritzanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß die Niederdruckpumpe (1) über eine Versorgungsleitung mit einem Kraftstofftank verbunden ist, wobei in der Versorgungsleitung ein Rückschlagventil (4.1, 4.2) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999147063 DE19947063A1 (de) | 1999-09-30 | 1999-09-30 | Einspritzanlage für eine Brennkraftmaschine |
DE19947063 | 1999-09-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1088984A2 true EP1088984A2 (de) | 2001-04-04 |
EP1088984A3 EP1088984A3 (de) | 2004-01-07 |
EP1088984B1 EP1088984B1 (de) | 2006-05-03 |
Family
ID=7923973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000121483 Expired - Lifetime EP1088984B1 (de) | 1999-09-30 | 2000-09-29 | Einspritzanlage für eine Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1088984B1 (de) |
DE (2) | DE19947063A1 (de) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003067075A1 (de) * | 2002-02-08 | 2003-08-14 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine |
WO2007107411A2 (de) * | 2006-03-22 | 2007-09-27 | Robert Bosch Gmbh | Kraftstoffhochdruckpumpe und kraftstoffeinspritzsystem für eine brennkraftmaschine |
FR2902841A3 (fr) * | 2006-06-26 | 2007-12-28 | Renault Sas | Systeme et procede de commande d'un moteur a combustion interne |
WO2008043755A1 (de) * | 2006-10-10 | 2008-04-17 | Continental Automotive Gmbh | Kraftstoffversorgungsystem |
WO2008077904A1 (de) * | 2006-12-21 | 2008-07-03 | Continental Automotive Gmbh | Einspritzanlage für eine brennkraftmaschine |
WO2013079519A1 (de) * | 2011-11-29 | 2013-06-06 | Robert Bosch Gmbh | Kraftstofffördereinrichtung für ein kraftstoffeinspritzsystem sowie kraftstoffeinspritzsystem |
WO2015048983A1 (en) * | 2013-10-04 | 2015-04-09 | Volvo Truck Corporation | Fuel injection system for low-viscosity fuels |
CN106837642A (zh) * | 2017-02-17 | 2017-06-13 | 广西玉柴机器股份有限公司 | 一种电控共轨发动机快速启动方法 |
WO2017155444A1 (en) * | 2016-03-07 | 2017-09-14 | Scania Cv Ab | Fuel system for an internal combustion engine and a method to increase the vaporization temperature of a fuel used in a fuel system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999005410A1 (en) | 1997-07-23 | 1999-02-04 | Pall Corporation | Engine fuel systems |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3731206A1 (de) * | 1987-09-17 | 1989-03-30 | Daimler Benz Ag | Entlueftungsvorrichtung fuer eine kraftstoffanlage von brennkraftmaschinen |
DE4040896A1 (de) * | 1990-12-20 | 1992-06-25 | Bosch Gmbh Robert | Tankentlueftungsanlage und verfahren zum ueberpruefen der dichtheit derselben |
DE19629627C2 (de) * | 1996-07-23 | 1998-09-10 | Daimler Benz Ag | Sicherheitsvorrichtung zur Vermeidung des Kraftstoffaustritts |
-
1999
- 1999-09-30 DE DE1999147063 patent/DE19947063A1/de not_active Withdrawn
-
2000
- 2000-09-29 DE DE50012683T patent/DE50012683D1/de not_active Expired - Lifetime
- 2000-09-29 EP EP20000121483 patent/EP1088984B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999005410A1 (en) | 1997-07-23 | 1999-02-04 | Pall Corporation | Engine fuel systems |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003067075A1 (de) * | 2002-02-08 | 2003-08-14 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine |
US7077107B2 (en) | 2002-02-08 | 2006-07-18 | Robert Bosch Gmbh | Fuel-injection device for an internal combustion engine |
WO2007107411A2 (de) * | 2006-03-22 | 2007-09-27 | Robert Bosch Gmbh | Kraftstoffhochdruckpumpe und kraftstoffeinspritzsystem für eine brennkraftmaschine |
WO2007107411A3 (de) * | 2006-03-22 | 2007-11-08 | Bosch Gmbh Robert | Kraftstoffhochdruckpumpe und kraftstoffeinspritzsystem für eine brennkraftmaschine |
FR2902841A3 (fr) * | 2006-06-26 | 2007-12-28 | Renault Sas | Systeme et procede de commande d'un moteur a combustion interne |
WO2008043755A1 (de) * | 2006-10-10 | 2008-04-17 | Continental Automotive Gmbh | Kraftstoffversorgungsystem |
WO2008077904A1 (de) * | 2006-12-21 | 2008-07-03 | Continental Automotive Gmbh | Einspritzanlage für eine brennkraftmaschine |
WO2013079519A1 (de) * | 2011-11-29 | 2013-06-06 | Robert Bosch Gmbh | Kraftstofffördereinrichtung für ein kraftstoffeinspritzsystem sowie kraftstoffeinspritzsystem |
WO2015048983A1 (en) * | 2013-10-04 | 2015-04-09 | Volvo Truck Corporation | Fuel injection system for low-viscosity fuels |
WO2015049062A1 (en) * | 2013-10-04 | 2015-04-09 | Volvo Truck Corporation | Fuel injection system for low-viscosity fuels |
WO2017155444A1 (en) * | 2016-03-07 | 2017-09-14 | Scania Cv Ab | Fuel system for an internal combustion engine and a method to increase the vaporization temperature of a fuel used in a fuel system |
CN106837642A (zh) * | 2017-02-17 | 2017-06-13 | 广西玉柴机器股份有限公司 | 一种电控共轨发动机快速启动方法 |
Also Published As
Publication number | Publication date |
---|---|
DE50012683D1 (de) | 2006-06-08 |
EP1088984A3 (de) | 2004-01-07 |
EP1088984B1 (de) | 2006-05-03 |
DE19947063A1 (de) | 2001-04-05 |
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