EP1133637B1 - Dispositif d'alimentation en carburant d'un moteur a combustion interne, a injection directe - Google Patents
Dispositif d'alimentation en carburant d'un moteur a combustion interne, a injection directe Download PDFInfo
- Publication number
- EP1133637B1 EP1133637B1 EP99960995A EP99960995A EP1133637B1 EP 1133637 B1 EP1133637 B1 EP 1133637B1 EP 99960995 A EP99960995 A EP 99960995A EP 99960995 A EP99960995 A EP 99960995A EP 1133637 B1 EP1133637 B1 EP 1133637B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pump
- pressure
- conduit
- tank
- 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
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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
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- 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
- 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
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
Definitions
- the present invention relates to a device fuel supply for a combustion engine internal direct injection and more particularly, to such a device comprising a) a reservoir of fuel, b) the first fuel pumping means contained in said tank, delivering fuel brought to a first pressure level higher than the atmospheric pressure, c) second means of pumping supplied by said first means and delivering fuel brought to a second level of pressure, greater than the first, at least one injector said fuel in an engine cylinder and d) means of recycling excess fuel not injected in the engine to said second pumping means and said tank.
- the device shown comprises a fuel tank 1, a pump 2 supplied by the tank 1 and associated with a pressure regulator 3 for delivering fuel to a second pump 5, through a filter 4, the fuel delivered by the pump 2 being brought to a first pressure level higher than atmospheric pressure, but relatively low, hence the name of "low pressure pump” given to the pump 2.
- the second pump 5 still records the fuel pressure, up to a second level, higher than the first, suitable for supplying fuel injectors 6 1 , 6 2 , 6 3 , 6 4 mounted on a ramp 7 for supplying fuel to the cylinders of a combustion engine internal direct injection (not shown).
- the pump 2 is commonly driven by a motor electric powered by the vehicle battery, and the pump 5 by the internal combustion engine itself.
- the pressure of the fuel delivered by the pump 5, called the "high pressure pump” is fixed by a regulator 8, which can be a mechanical regulator such as a calibrated valve for example, or an electromechanical regulator, such as a controlled solenoid valve by a computer 9.
- a sensor 10 delivers to the computer 9 a signal representative of the pressure of the fuel contained in the rail 7, to allow the computer to regulate the pressure of the fuel in this rail at the level predetermined required.
- the computer 9 is commonly constituted by the engine operating management computer, controlling inter alia the injectors 6 i (i from 1 to 4 in the example shown).
- the fuel not delivered by the injectors 6 i is returned to the tank to be recycled, through a conduit 11,12, brought to atmospheric pressure.
- a part 12 of this conduit also serves as a leakage conduit for the low pressure pump 2, when the pressure of the fuel which it delivers exceeds the level fixed by the regulator 3, a calibrated valve for example.
- the proper functioning of the devices of the type described above is notably conditioned by their ability to ensure rapid and safe pressure build-up fuel supplied to the injectors when starting the engine, cold or hot. It may not be so due to the presence of a vapor cap fuel at the inlet of the high pressure pump 5, plug which results, for example, from the phenomenon mentioned above fuel vaporization or "percolation" during an engine stop due to overheating of the high pressure liquid fuel contained in the rail 7 and in the conduits connected to the input of pump 5, under the effect of calories stored in the metal parts of the engine.
- the high pressure pump 5 having only a low efficiency volumetric when the internal combustion engine which the drive turns at low speed, it is only when the liquid fuel supplied by the low pressure pump 2 expelled these vapors from the inlet of the high pump pressure that this can feed the ramp 7 and the 6i injectors with high pressure fuel suitable.
- the present invention therefore aims to achieve a fuel supply device for a internal combustion with direct injection of the type described in preamble to this description, and which does not present not the disadvantages outlined above.
- a supply device for fuel from an internal combustion injection engine direct comprising a) a fuel tank, b) first means of pumping the fuel contained in said tank, delivering fuel brought to a first pressure level higher than pressure atmospheric, c) second pumping means powered by said first means and delivering fuel brought to a second pressure level, greater than the first, at least one injector of said fuel in an engine cylinder and, d) means for recycling excess fuel not injected into the engine to said second pumping means and said tank, this device being remarkable in that that said recycling means comprise a conduit traveled simultaneously by said excess fuel and the fuel delivered by said first means of pumping and in that a pressure regulator forming part of said first pumping means is placed in downstream of said conduit.
- the device according to the present invention combines the respective advantages of the devices of the technique shown in Figures 1 and 2 of the drawing annexed, while limiting the disadvantages.
- the conduit traversed simultaneously by the excess fuel and the fuel delivered by the first pumping means leads to the inlet of a pump forming part of the second pumping means.
- FIGS. 3 and 4 This is how we find in FIGS. 3 and 4, a fuel tank 1, first pumping means constituted by a pump 2 and a "low pressure” regulator 3, a filter 4, second pumping means constituted by a pump 5 and a “high pressure” regulator 8, a ramp 7 for supplying fuel to a plurality of injectors 6 i , a conduit 11 for recycling fuel not absorbed by the injectors, a computer 9 controlling the injectors 6i and the regulator 8, the computer receiving to do this a signal from a fuel pressure sensor 10.
- the low pressure pump 2 is animated by an electric motor while the pump 5 high pressure is driven by the internal combustion engine at direct injection powered by the following device the invention.
- the excess fuel, not absorbed by the 6i injectors is recycled directly in the inlet of the high pressure pump 5 by a line 15, through the filter 4, and not returned directly to the tank.
- the low pressure pump 2 itself dispenses fresh fuel from the tank in line 15 in upstream of the filter 4.
- a return pipe of fuel to the tank is fed in parallel with the "high pressure" pump 5.
- this duct 14 starts from inlet 13 of pump 5 for return fuel not absorbed by this "high pressure” pump, the regulator 3 "low pressure "being placed in this conduit 14.
- the return pipe 14 ' is "pitted" in the lower part pump body pressure 5.
- the high pressure pump is fueled by a "hot" fuel mixture from ramp 7 supplied with high fuel pressure and "fresh” fuel at low pressure, from tank 1 and this as well in the embodiment of Figure 3 than in that of figure 4.
- the fuel mixture thus established is delivered to pump 5, at a low pressure regulated by the regulator 3 associated with pump 2.
- the injection of fuel by the pump 2 in the fuel leakage line 11 hot surplus from ramp 7 causes a condensation of fuel vapors if necessary contained in fuel from the rail.
- the pump high pressure 5 is then supplied with fuel at least largely purged of fuel vapors, which allows rapid priming of this pump when starting the engine, whether it is hot or cold.
- the fuel system between the ramp 7 and the high pressure pump 5, does not contain parts at atmospheric pressure. Upstream of the pump 5, the fuel remains at the fixed low pressure via regulator 3, even after the engine has stopped (and therefore pumps 2 and 5). This limits the quantity fuel vapors that can form in the circuit by the phenomenon of "percolation" mentioned more high. The absence of air intake between ramp 7 and the pump 5 prevents the emptying of this part of the circuit, during engine stops.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- les figures 1 et 2 sont des schémas de dispositifs d'alimentation en carburant de la technique antérieure, décrits en préambule de la présente description, et
- les figures 3 et 4 sont des schémas de premiers et deuxièmes modes de réalisation du dispositif suivant l'invention, respectivement.
Claims (5)
- Dispositif d'alimentation en carburant d'un moteur à combustion interne à injection directe, comprenant :a) un réservoir (1) de carburant,b) des premiers moyens de pompage du carburant contenu dans ledit réservoir, comportant une pompe (2) et un régulateur de pression (3), délivrant du carburant porté à un premier niveau de pression supérieur à la pression atmosphérique,c) des deuxièmes moyens de pompage (5,8) alimentés par lesdits premiers moyens (2,3) et délivrant du carburant porté à un deuxième niveau de pression, supérieur au premier, à au moins un injecteur (6i) dudit carburant dans un cylindre du moteur et,d) des moyens de recyclage du carburant excédentaire non injecté dans le moteur vers lesdits deuxièmes moyens de pompage (5,8) et ledit réservoir (1), comprenant un conduit (15) aboutissant sur l'entrée (13) d'une pompe (5) formant partie desdits deuxièmes moyens de pompage (5,8) et parcouru simultanément par ledit carburant excédentaire et le carburant délivré par lesdits premiers moyens de pompage (2,3)
- Dispositif conforme à la revendication 1, caractérisé en ce que ledit régulateur de pression (3) est placé dans un conduit (14;14') de renvoi de carburant audit réservoir (1).
- Dispositif conforme à la revendication 3, caractérisé en ce que ledit conduit (14) est piqué sur l'entrée de ladite pompe (5).
- Dispositif conforme à la revendication 3, caractérisé en ce que ledit conduit (14') est piqué sur une partie de ladite pompe (5) traversée par du carburant au premier niveau de pression.
- Véhicule automobile propulsé par un moteur à combustion interne à injection directe, équipé du dispositif conforme à l'une quelconque des revendications 1 à 4.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9814975A FR2786534B1 (fr) | 1998-11-27 | 1998-11-27 | Dispositif d'alimentation en carburant d'un moteur a combustion interne, a injection directe |
FR9814975 | 1998-11-27 | ||
PCT/EP1999/009075 WO2000032929A1 (fr) | 1998-11-27 | 1999-11-22 | Dispositif d'alimentation en carburant d'un moteur a combustion interne, a injection directe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1133637A1 EP1133637A1 (fr) | 2001-09-19 |
EP1133637B1 true EP1133637B1 (fr) | 2002-09-25 |
Family
ID=9533277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99960995A Expired - Lifetime EP1133637B1 (fr) | 1998-11-27 | 1999-11-22 | Dispositif d'alimentation en carburant d'un moteur a combustion interne, a injection directe |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1133637B1 (fr) |
JP (1) | JP2002531753A (fr) |
KR (1) | KR20010080540A (fr) |
DE (1) | DE69903191T2 (fr) |
FR (1) | FR2786534B1 (fr) |
WO (1) | WO2000032929A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10059012A1 (de) * | 2000-11-28 | 2002-06-13 | Bosch Gmbh Robert | Kraftstoffeinspritzsystem mit Kraftstoffvorwärmung und kraftstoffgekühltem Druckregelventil |
DE10205186A1 (de) * | 2002-02-08 | 2003-08-21 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
GB0205965D0 (en) | 2002-03-14 | 2002-04-24 | Delphi Tech Inc | Fuel system |
MX368118B (es) * | 2013-03-14 | 2019-09-19 | Deka Products Lp | Sistema de suministro de producto. |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19539885A1 (de) * | 1995-05-26 | 1996-11-28 | Bosch Gmbh Robert | Kraftstoffversorgungsanlage und Verfahren zum Betreiben einer Brennkraftmaschine |
JPH09158766A (ja) * | 1995-12-07 | 1997-06-17 | Nissan Motor Co Ltd | 筒内直接噴射式火花点火内燃機関の燃料噴射装置 |
-
1998
- 1998-11-27 FR FR9814975A patent/FR2786534B1/fr not_active Expired - Fee Related
-
1999
- 1999-11-22 JP JP2000585546A patent/JP2002531753A/ja active Pending
- 1999-11-22 EP EP99960995A patent/EP1133637B1/fr not_active Expired - Lifetime
- 1999-11-22 WO PCT/EP1999/009075 patent/WO2000032929A1/fr not_active Application Discontinuation
- 1999-11-22 DE DE69903191T patent/DE69903191T2/de not_active Expired - Fee Related
- 1999-11-22 KR KR1020017006453A patent/KR20010080540A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
FR2786534A1 (fr) | 2000-06-02 |
KR20010080540A (ko) | 2001-08-22 |
JP2002531753A (ja) | 2002-09-24 |
DE69903191D1 (de) | 2002-10-31 |
FR2786534B1 (fr) | 2000-12-29 |
WO2000032929A1 (fr) | 2000-06-08 |
EP1133637A1 (fr) | 2001-09-19 |
DE69903191T2 (de) | 2003-02-13 |
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