EP1988279A1 - Système d'injection pour moteurs à combustion interne fonctionnant au carburant, en particulier à l'huile lourde - Google Patents
Système d'injection pour moteurs à combustion interne fonctionnant au carburant, en particulier à l'huile lourde Download PDFInfo
- Publication number
- EP1988279A1 EP1988279A1 EP08008092A EP08008092A EP1988279A1 EP 1988279 A1 EP1988279 A1 EP 1988279A1 EP 08008092 A EP08008092 A EP 08008092A EP 08008092 A EP08008092 A EP 08008092A EP 1988279 A1 EP1988279 A1 EP 1988279A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- injector
- injection system
- pressure accumulator
- accumulator
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 39
- 239000000446 fuel Substances 0.000 title claims description 26
- 239000000295 fuel oil Substances 0.000 title claims description 13
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 230000000903 blocking effect Effects 0.000 claims description 11
- 239000002828 fuel tank Substances 0.000 claims description 11
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 claims 1
- 238000010926 purge Methods 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000004941 influx Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/02—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means with fuel-heating means, e.g. for vaporising
-
- 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 fuel, in particular heavy fuel, operated internal combustion engine according to the preamble of claim 1.
- Injection systems of the aforementioned type are known from DE 196 45 243 C2 known.
- Heavy oil is highly viscous at ambient temperature and of about tarry consistency. Accordingly, it is necessary to heat it for liquefaction in order to inject it below.
- the heavy oil must also be kept in the injection system at a temperature corresponding to this liquefaction temperature in order to maintain the functionality of the system.
- the fuel system associated parts including the fuel tank are kept at appropriate temperatures, which is usually done by the fuel supply system associated parts, in particular the injection system with appropriately heated fuel , here so heavy oil, which is heated to about 150 ° C, to be rinsed.
- the internal combustion engine as such in particular in large engines, like marine engines, are kept at temperature so they can be restarted immediately after a standstill period.
- the injectors which are structurally connected to the internal combustion engine, are kept correspondingly warm by the contact with the internal combustion engine, so that the system as a whole is ready for operation after standstill periods.
- the invention has for its object to prevent the unwanted Nachf pattern of fuel supplied via the injectors of the injection system combustion chambers at standstill of the internal combustion engine in the purge mode for the injection system.
- the proposed arrangement can be designed in a simple manner, lying in the connection of the high-pressure accumulator to the injector, that a return from the injector to the high-pressure accumulator blocking valve assembly is provided, for example in the function of a check valve, which opens in the opposite direction only when on Pages of the high-pressure accumulator is pending a threshold exceeding operating pressure.
- This can be achieved with little effort by a resilient application of the check valve to its closed position with matched to the predetermined threshold spring force, so that the valve assembly so far represents a pressure holding valve that releases the connection from the high-pressure accumulator to the injector only at a pressure in the high-pressure accumulator, which lies beyond the flushing pressure.
- Downstream of the threshold value-dependent operating valve arrangement can be locked in the line connection to the injector, and also in the injector itself, after switching off the internal combustion engine still a pressurized volume of liquid.
- this can be so great that undesired discharges to a downstream combustion chamber due to leakages or other errors lead to unwanted effects during the stoppage time of the internal combustion engine even damage occurs when restarting the engine.
- valve arrangement and valve connection can also be structurally combined, for example in the form of a shuttle valve.
- FIGS. 1 and 2 With regard to the principle of the same structure of the injection systems shown in the scheme can be found in the explanation of FIGS. 1 and 2 for the same parts the same reference numerals use, wherein 1 denotes an internal combustion engine, of which only a section is illustrated with the combustion chamber 2 of a cylinder.
- the internal combustion engine 1 is formed Centerlindrig and analogous to the injector 3 on the combustion chamber 2 injecting a corresponding plurality of injectors 3 are provided, which are connected in parallel to the injector 3 shown here in the generally designated 4 injection system.
- the injection system 4 is shown with its most essential elements and comprises, starting from a fuel tank 5 for fuel oil intended as fuel from the fuel tank 5 via a line 6 sucking prefeed pump 7 as a low pressure source connected via a line 8 to the high-pressure pump 9 of a high pressure unit 10 is.
- the prefeed pump 7 and the high-pressure pump 9 form the pump arrangement 11, via which the heavy oil is conveyed as fuel into the high-pressure accumulator 13.
- the high-pressure accumulator 13, preferably designed as a common rail, has a line connection 14 to the injector 3 and is connected in a corresponding manner, which is not shown, with injectors 3 injecting the combustion chambers 2 of further cylinders of the internal combustion engine 1.
- the high-pressure accumulator 13 is connected via a switching valve 15 and a line 16 as part of a return connection to the fuel tank 5.
- the temperature of the injection system 4 is ensured by the fact that heated fuel from the fuel tank 5 via the prefeed pump 7 of the high-pressure unit 10 and from there to the high-pressure accumulator 13 is supplied.
- the fuel is returned via the line 16 back to the fuel tank 5.
- the operation of the high-pressure pump 9 is not required, and it can promote the prefeed pump 7, which sucks from the fuel tank 5, with appropriate structural design of the high pressure pump 9 either continuously through the high pressure pump 9 to the high-pressure accumulator 13, or bypassing the high-pressure pump 9, as designed in the embodiment.
- a bypass to the high-pressure pump 9 is integrated in the high-pressure unit 10, so that when flushing the flow, for example, stationary high-pressure pump 9, the flushing can be done with heated fuel.
- the bypass in bypass to the high pressure pump 9 is denoted by 17 and it is in the bypass 17 a valve, in particular a check valve 18 which locks in the direction of its connection to the feed pump 7 and opens in the opposite direction and can be flowed through when the high-pressure accumulator 13 on the Line 16 is connected to the fuel tank 5 and thus substantially no pressure is added to the check valve 18 in the direction of its locking position.
- the injector 3 the necessary temperature due to its structural connection to the internal combustion engine 1 is guaranteed even during downtime of the internal combustion engine 1, since it is heated. As a result, it is not necessary to include the injector 3 in downtime of the internal combustion engine 1 in the rinse cycle. In connection with a connection to the rinsing cycle, for example via the line connection 14, leaks of the injector 3 or other errors with the internal combustion engine 1 stationary could however lead to the fact that via the injector 3 a fraction of the fuel circulated in the rinsing circuit, which is below that of the Pre-feed pump 7 is built pressure, enters the combustion chamber 2.
- an arrangement 19 which releases the inlet to the injector 3 only when the pressure in the high pressure accumulator 13 is above a threshold value which is greater than the purge pressure.
- This is realized in an arrangement 19 according to FIG Fig. 1 with a check valve 20 which locks in the flow direction to the high-pressure accumulator 13 and biased in the direction of this blocking position, here is loaded by a spring 21, wherein the check valve 20 in the direction of its blocking position acting force, for example, the force of the spring 21st , Is dimensioned so that in the purge mode, the inlet from the high-pressure accumulator 13 is locked to the injector 3.
- the set in the embodiment by the force of the spring 21 threshold, in which the inlet is released from the memory 13 to the injector 3, is above the built-up via the feed pump 7 flushing pressure, but below to be built on the high-pressure pump 9, for the operation of the internal combustion engine 1 required pressure.
- this threshold value Based on a flushing pressure of, for example, about 10 bar to be established via the prefeed pump 7, this threshold value can be set relatively low and be at a safety margin above the flushing pressure, for example at about 15 bar, so that only a small spring force is required.
- the arrangement 19 according to the invention can also be realized with pressure-controlled valves, for example directional control valves.
- the on the array 19 injector delimited volume can - as to the injector 3 local accumulator - in particular be at a long conduction paths and / or an external or internal injector 3 directly associated storage volume so large that at standstill of the internal combustion engine and, due to the shutdown, when still shut off under high pressure, demarcated by the arrangement 19 volume by leaks or errors of Injector 3 exceeds a quantity of fuel to the combustion chamber 2, which can lead to interference or damage when starting the internal combustion engine 1.
- a valve connection 22 is provided, which blocks in the direction of the injector, and in the opposite direction, so in the direction of the high-pressure accumulator 13 can be overflowed, when the part of the high-pressure accumulator 13, a lower pressure is applied than the part of the injector 3. Shown is the Valve assembly 22 through a check valve 23 so that the valves 20 and 23 have opposite reverse direction.
- check valve 23 is only symbolic and it is within the scope of the invention of course possible to summarize the aforementioned functions in an array 19 and, where appropriate, by corresponding switchable valves, so for example, pressure-responsive directional control valves to realize.
- the invention thus shows ways to avoid with simple means, the negative effects of injector side given leaks and / or other errors with regard to the unwanted supply of fuel to a combustion chamber 2 of the internal combustion engine 1 at standstill thereof. This is also the case with flushing injection systems 4, regardless of whether the injection systems 4, work with or without the injector 3 associated quantity limiting valve and are formed with or without injector to local pressure accumulator.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007021085A DE102007021085B4 (de) | 2007-05-03 | 2007-05-03 | Einspritzsystem für mit Kraftstoff, insbesondere Schweröl, betriebene Brennkraftmaschinen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1988279A1 true EP1988279A1 (fr) | 2008-11-05 |
| EP1988279B1 EP1988279B1 (fr) | 2009-11-18 |
Family
ID=39713914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08008092A Active EP1988279B1 (fr) | 2007-05-03 | 2008-04-28 | Système d'injection pour moteurs à combustion interne fonctionnant au carburant, en particulier à l'huile lourde |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1988279B1 (fr) |
| CN (1) | CN101298857B (fr) |
| AT (1) | ATE449253T1 (fr) |
| DE (1) | DE102007021085B4 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2423498A1 (fr) * | 2010-08-26 | 2012-02-29 | Wärtsilä Schweiz AG | Soupape de limitation de débit passive |
| FR2969216A1 (fr) * | 2010-12-20 | 2012-06-22 | Bosch Gmbh Robert | Soupape de limitation de pression et correction de depression d'accumulateur haute pression de carburant |
| CN108757254A (zh) * | 2018-06-28 | 2018-11-06 | 武汉理工大学 | 船用重油燃油喷射系统试验台架 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9371903B2 (en) * | 2014-04-30 | 2016-06-21 | Ford Global Technologies, Llc | Method for shifting a shift-by-wire transmission without engine power |
| EP3121425A1 (fr) * | 2015-07-24 | 2017-01-25 | Winterthur Gas & Diesel AG | Procédé et dispositif d'inspection d'un dispositif d'injection à commande électronique pour injecter du carburant dans un cylindre d'un moteur à combustion interne |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0531533A1 (fr) * | 1991-01-14 | 1993-03-17 | Nippondenso Co., Ltd. | Dispositif gicleur de carburant du type a accumulation de pression |
| DE19645243A1 (de) * | 1996-11-02 | 1998-05-14 | Orange Gmbh | Druckspeicher-Einspritzvorrichtung |
| US6058912A (en) * | 1995-05-26 | 2000-05-09 | Robert Bosch Gmbh | Fuel supply system and method for operating an internal combustion engine |
| FR2817917A1 (fr) * | 2000-12-13 | 2002-06-14 | Bosch Gmbh Robert | Procede et dispositif pour refroidir une installation d'injection de carburant |
| DE10353141A1 (de) * | 2003-11-14 | 2005-06-09 | Robert Bosch Gmbh | Verfahren zum Entleeren des Kraftstoffspeichers eines Einspritzsystems einer Brennkraftmaschine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10153149A (ja) * | 1996-11-25 | 1998-06-09 | Isuzu Ceramics Kenkyusho:Kk | 重油を燃料として用いるエンジンにおける燃料加熱装置 |
-
2007
- 2007-05-03 DE DE102007021085A patent/DE102007021085B4/de active Active
-
2008
- 2008-04-28 AT AT08008092T patent/ATE449253T1/de active
- 2008-04-28 EP EP08008092A patent/EP1988279B1/fr active Active
- 2008-05-04 CN CN2008100928217A patent/CN101298857B/zh active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0531533A1 (fr) * | 1991-01-14 | 1993-03-17 | Nippondenso Co., Ltd. | Dispositif gicleur de carburant du type a accumulation de pression |
| US6058912A (en) * | 1995-05-26 | 2000-05-09 | Robert Bosch Gmbh | Fuel supply system and method for operating an internal combustion engine |
| DE19645243A1 (de) * | 1996-11-02 | 1998-05-14 | Orange Gmbh | Druckspeicher-Einspritzvorrichtung |
| DE19645243C2 (de) | 1996-11-02 | 1998-10-29 | Orange Gmbh | Druckspeicher-Einspritzvorrichtung |
| FR2817917A1 (fr) * | 2000-12-13 | 2002-06-14 | Bosch Gmbh Robert | Procede et dispositif pour refroidir une installation d'injection de carburant |
| DE10353141A1 (de) * | 2003-11-14 | 2005-06-09 | Robert Bosch Gmbh | Verfahren zum Entleeren des Kraftstoffspeichers eines Einspritzsystems einer Brennkraftmaschine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2423498A1 (fr) * | 2010-08-26 | 2012-02-29 | Wärtsilä Schweiz AG | Soupape de limitation de débit passive |
| FR2969216A1 (fr) * | 2010-12-20 | 2012-06-22 | Bosch Gmbh Robert | Soupape de limitation de pression et correction de depression d'accumulateur haute pression de carburant |
| CN108757254A (zh) * | 2018-06-28 | 2018-11-06 | 武汉理工大学 | 船用重油燃油喷射系统试验台架 |
| CN108757254B (zh) * | 2018-06-28 | 2024-03-15 | 武汉理工大学 | 船用重油燃油喷射系统试验台架 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1988279B1 (fr) | 2009-11-18 |
| DE102007021085A1 (de) | 2008-11-13 |
| ATE449253T1 (de) | 2009-12-15 |
| CN101298857A (zh) | 2008-11-05 |
| CN101298857B (zh) | 2011-09-28 |
| DE102007021085B4 (de) | 2009-01-15 |
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