EP3126653A1 - Method of injecting fuel into the combustion chamber of an internal combustion engine operating in single-fuel or multiple-fuel mode - Google Patents
Method of injecting fuel into the combustion chamber of an internal combustion engine operating in single-fuel or multiple-fuel modeInfo
- Publication number
- EP3126653A1 EP3126653A1 EP15711156.8A EP15711156A EP3126653A1 EP 3126653 A1 EP3126653 A1 EP 3126653A1 EP 15711156 A EP15711156 A EP 15711156A EP 3126653 A1 EP3126653 A1 EP 3126653A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- zone
- liquid fuel
- combustion chamber
- fuem
- 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.)
- Withdrawn
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0686—Injectors
- F02D19/0689—Injectors for in-cylinder direct injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/0648—Means or methods to improve the spray dispersion, evaporation or ignition
- F02B23/0651—Means or methods to improve the spray dispersion, evaporation or ignition the fuel spray impinging on reflecting surfaces or being specially guided throughout the combustion space
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0678—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
- F02B23/0693—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets the combustion space consisting of step-wise widened multiple zones of different depth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
- F02D19/0652—Biofuels, e.g. plant oils
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/10—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
- F02D19/0652—Biofuels, e.g. plant oils
- F02D19/0655—Biofuels, e.g. plant oils at least one fuel being an alcohol, e.g. ethanol
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0686—Injectors
- F02D19/0692—Arrangement of multiple injectors per combustion chamber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Definitions
- the present invention relates to a method for injecting fuel into the combustion chamber of an internal combustion engine, in particular a compression ignition engine. It relates more particularly to a fuel injection method for an engine used in the aeronautical or road field or in the field of stationary installations, such as a generator.
- This type of engine generally comprises at least one cylinder, a piston comprising a pin disposed in a concave bowl and sliding in this cylinder in a reciprocating rectilinear motion, means for admitting an oxidizer, means for exhausting burnt gases , a combustion chamber, and injection means for injecting fuel into the combustion chamber.
- an internal combustion engine comprising fuel injection means with jets according to at least two web angles and a piston having a bowl provided with a nipple with two volumes of combustion zones and internal aerodynamics substantially improving the quality of combustion.
- the fuel used for operation in monocarburation is a fuel in liquid form (hereinafter referred to as the FueM description), such as Diesel (diesel), but any other type of liquid fuel such as ethanol or a biofuel can be used.
- the FueM description such as Diesel (diesel)
- another fuel in the gaseous state such as NGV (Natural Gas for Vehicle), LPG (Liquefied Petroleum Gas), biogas or any other liquid fuel with volatile properties sufficient to be vaporized completely. before the initiation of combustion, such as gasoline, (hereinafter referred to as Fuel2) is associated with liquid fuel FueM.
- the invention relates to a fuel injection method for a compression-ignition internal combustion engine operating in monocarburizing mode or multicarburation mode and comprising at least one cylinder, a piston sliding in this cylinder, a chamber of combustion comprising two mixing zones Z1, Z2 and delimited on one side by the upper face of the piston having a lug rising in the direction of the cylinder head and disposed in the center of a concave bowl and a cylinder head carrying injection means fuel projecting liquid fuel according to at least two different ply angle fuel jet plies, a lower ply for zone Z1 and an upper ply for zone Z2, and means for admitting an oxidant as well as means for exhausting burnt gases, characterized in that it consists, for the monocarburizing operating
- the method may involve injecting a liquid fuel with physicochemical characteristics allowing the operation of the engine with compression ignition, such as diesel, ethanol or a biofuel.
- the method may include introducing a gaseous fuel into the combustion chamber via the manifold of the intake means for producing an oxidant / fuel mixture.
- the method may include injecting a gaseous fuel in the form of NGV (Natural Gas for Vehicle), or LPG (Liquefied Petroleum Gas), or biogas
- the method may include injecting into the combustion chamber a liquid fuel having volatility characteristics allowing vaporization before the initiation of combustion to produce an oxidant / fuel mixture.
- the method may include injecting gasoline
- the method may consist, for the monocarburizing operating mode, of injecting the same mass of liquid fuel by the two plies into the oxidant present in the two zones of the combustion chamber.
- the method may consist, for the monocarburizing mode of operation, of injecting, by the two layers of jets, a different mass of liquid fuel into the oxidant present in each zone.
- the method may consist, for the multi-carburizing mode of operation, of injecting by the lower layer of jets liquid fuel into the oxidant / fuel mixture present in the lower zone of the combustion chamber.
- the method may consist, for the multicarburation operating mode, of injecting the two jet plies with liquid fuel into the oxidant / fuel mixture present in the two zones of the combustion chamber.
- the method may involve injecting by the two jet plies a different liquid fuel mass into the oxidant / fuel mixture present in each zone.
- the method may consist of injecting the two masses of jets with the same mass of liquid fuel into the oxidant / fuel mixture present in each zone.
- the method may consist in using means for managing the injection means as a function of the operating parameters of the engine, in particular the load and the speed of this engine.
- FIGS. 2 to 6 which illustrate examples of operation of the motor according to FIG.
- a direct-injection internal combustion engine with direct injection and possibly indirect fuel injection comprises at least one cylinder 10, a cylinder head 12 closing the cylinder in part high, means 14 for direct injection of liquid fuel (FueM), gaseous or liquid fuel injection means (Fuel2) and a piston 1 6 of axis XX 'sliding in the cylinder in a reciprocating rectilinear motion.
- FueM liquid fuel
- Fuel2 gaseous or liquid fuel injection means
- FueM liquid fuel is understood to mean a fuel, such as diesel, ethanol or a biofuel or any other fuel having the physicochemical characteristics allowing the operation of a compression ignition type engine including an injection system direct from this fuel.
- the Fuel2 fuel may be a gaseous fuel, such as NGV (Natural Gas for Vehicle), LPG (Liquefied Petroleum Gas), a biogas or any other fuel with sufficient volatility properties to be totally vaporized before the initiation of the fuel. combustion (gasoline-type fuel for example) is associated with this type FueM liquid fuel.
- This engine also comprises a flue exhaust means 18 with at least one exhaust pipe 20 whose opening can be controlled by any means, such as for example an exhaust valve 22 and an intake means 24.
- a oxidizer with at least one tubing intake 26 whose opening can be controlled by any means, such as an intake valve 28.
- the intake means may be shaped to admit the oxidant with a determined aerodynamic level (swirl rate and / or tumble for example).
- the admission means may comprise a specific geometry of the intake manifold.
- the oxidant is air at ambient pressure or supercharged air or a mixture of air (supercharged or not) with recirculated exhaust gas re-admitted into the combustion chamber.
- the direct injection means comprise at least one liquid fuel injector 30, for fuel FueM, preferably disposed in the axis XX 'of the piston whose nose 32 has a multiplicity of orifices through which the fuel is sprayed and projected towards the combustion chamber 34 of the engine.
- the projected fuel forms at least two plies of fuel jets, in the example shown two plies 36 and 38 of fuel jets 40 and 42, which have, here, an axis general confused with that of the piston 1 6 while being located axially one above the other.
- the ply 36 which is located closest to the piston 1 6, is referred to in the following description of the lower ply while the ply 38 placed furthest from this plunger is called the upper ply.
- these two plies form plane angles A1 and A2 that are different from one another.
- ply angle it is understood the vertex angle that forms the cone from the injector and whose imaginary peripheral wall passes through all the axes C1 or C2 of the jets 40 or 42.
- the ply angle A1 of the low ply is at most 130 °, preferably between 105 ° and 130 °, whereas the ply angle A2 of the high ply is at most 180 °, preferably between 155 ° and 180 °.
- the injection means for FueM fuel are not arranged in the axis XX ', but in this case, the general axis of fuel jet plies from the fuel injector is at least substantially parallel to this axis XX '.
- each web is carried by a separate injector (single-web injector) with dedicated targeting in separate areas of the combustion chamber.
- the fuel injection means for fuel Fuel2, which are indirect injection means 15, for the nonlimiting example illustrated in FIG. 1, comprise at least one injector 44 of Fuel2 fuel which is placed on the fuel pipe. inlet 26 so as to inject fuel into the interior of this tubing to mix with the oxidant circulating therein.
- the injection means will be direct injection means placed on the cylinder head and will inject fuel into the combustion chamber to be totally vaporized before initiation of combustion and ensure optimal mixing with the oxidant.
- the combustion chamber 34 is delimited by the internal face of the cylinder head 12 opposite the piston, the circular inner wall of the cylinder 10 and the upper face 46 of the piston 1 6.
- This upper face of the piston comprises a concave bowl 48, here of axis coincident with that of the cylinder, whose concavity is turned towards the cylinder head and which houses a stud 50 located substantially in the center of the bowl, which rises towards the cylinder head 12 , being preferably coaxial with the axis of the fuel plies coming from the injector 30.
- the axis of the bowl is not coaxial with that of the cylinder but the essential lies in the arrangement according to which the axis of the sheet of fuel jets, the pin axis and the axis of the bowl are preferably confused.
- the stud 50 of generally frustoconical shape, has a top 52 preferably rounded, continuing, deviating symmetrically from the axis XX 'to the outside of the piston 1 6, by a substantially rectilinear inclined flank 54 arriving at a bottom 56 of the bowl.
- the bottom of this bowl is rounded with a concave rounded surface 58, called the internal rounded surface, connected to the bottom of the inclined sidewall 54 and another concave rounded surface 60, called the outer rounded surface, connected by one of its ends at the lower end of the inner rounded surface and the other of its ends to a side wall 62, here substantially vertical.
- the two rounded surfaces 58 and 60 thus delimit the lower part of a toric volume, here a torus 64 of substantially cylindrical section.
- the side wall 62 continues, always deviating from the axis XX ', by a convex rounded surface 66, called a reentrant, resulting in an inclined plane 68 connected to a concave inflexion surface 69 connected to a substantially flat surface 70.
- This flat surface is continued by an outer convex surface 72 which reaches a flat surface 74 extending to the vicinity of the wall of the cylinder.
- the combustion chamber 34 thus comprises two distinct zones Z1 and Z2 in which mixing is carried out between the fuel FueM injected by the injector 30 into the oxidizer (air - supercharged or not - or mixture of air and recirculated flue gas ) and / or in the fuel mixture (combustion mixture and Fuel2 fuel) that they contain and the combustion of the fuel mixture thus formed as will be explained later.
- the zone Z1 delimited by the stud 48, the torus 64 of the bottom of the bowl, the wall 62 and the rounded convex surface 66, forms the lower zone of the combustion chamber which is associated with the lower layer 36 of fuel jets. C1 axis.
- the combustion chamber demarcated by the inclined plane 68, the concave surface 69, the substantially planar surface 70, the convex surface 72, the flat surface 74, the peripheral inner wall of the cylinder and the cylinder head 12, constitutes the upper zone of this chamber. which is associated with the upper layer 38 of C2 axis fuel jets.
- the combustion chamber is separated into several zones (here two zones) which are associated with a fuel injection FueM and which are concerned or not by combustion depending on the operating mode and the engine load.
- the distribution of heat flows between the piston and the cylinder head is optimized in particular by increasing the volume of the zone Z2 relative to a conventional piston.
- the interaction between the fuel jets and the face of the piston allows increased cooling of the piston further reducing the thermal stresses on the latter.
- the FueM fuel injector also allows the introduction of different injected fuel masses, durations and different injection times between the slicks to ensure optimal use of the oxidant and / or the fuel mixture (combustion and fuel mixture). Fuel2) located in both the low and high zones.
- the invention thus makes it possible to inject fuel either into the two zones or into one or other of these zones and thus to ensure mixing with the oxidant to achieve combustion of the fuel mixture present in the chamber.
- FIG. 2 illustrates a mode of operation of the engine in monocarburation with a homogeneous combustion for the low loads or for partial loads.
- the liquid fuel is injected into the low zone Z1 zone of the combustion chamber using only the fuel jets 40 of the lower layer 36. to mix with the oxidant that has been admitted during the intake phase of the engine.
- FIG. 3 illustrates another mode of operation in monocarburation which corresponds to a fuel injection in the high zone Z2 of the combustion chamber coming to rest on the surfaces 68, 70 and 72 of the piston to mix with the oxidant present in this zoned.
- This mode of operation aims in particular to improve the engine starting by using only the fuel jets 42 of the upper web 38, close to the glow plug that usually includes such a type of engine.
- Figure 4 illustrates the monocarburizing operation of the engine for high loads.
- the fuel is injected into both the low zone Z1 and the high zone Z2 of the combustion chamber 34.
- the fuel jets 40 of the low sheet 36 are directed towards the zone Z1 while the fuel jets 42 of the high sheet 38 are sent to the zone Z2.
- the liquid fuel will be distributed optimally between the lower zone and the upper zone of the combustion chamber in accordance with the volumes of the latter two at the instant of injection. By this distribution, the local wealth in each zone can be controlled and thus the production of pollutants such as NOx, CO, HC and soot will be limited.
- the examples illustrated in FIGS. 5 and 6 show the various configurations in multicarburation, here in bi-fuel, which are used to further limit the pollutant emissions.
- the intake valve 28 is controlled in opening and the fuel injector 44 Fuel2 is operative to introduce fuel into the intake manifold.
- Fuel2 80 fills almost all combustion chamber 34 to a position close to the bottom dead center of the piston, position at which the inlet valve is controlled in closing .
- the piston In the compression phase of the engine, the piston reaches the vicinity of its top dead center and the injector 30 is controlled to inject liquid fuel FueM either in the low zone Z1 or in the two zones Z1 and Z2 where Combustion of the fuel / fuel mixture Fuel2 80 will be initiated by the self-ignition of the FueM fueh fuel injected.
- an injection of liquid fuel FfueM is carried out in the fuel oxidant / fuel mixture 80 of the zone Z1 using only the fuel jets 40 of the lower sheet 36 to initiate the combustion of the fuel mixture. present in this zone Z1.
- This combustion with a flame front is subsequently propagated in the rest of zone Z1 and then in zone Z2.
- This injection is in particular carried out in operating mode of the engine with low load and low speed.
- an injection of a liquid fuel mass into the zone Z1 is performed by the lower ply 36 and an injection of another mass of liquid fuel by the upper sheet 38 in the zone Z2, mass which is less than that injected into the zone Z1 (possibly with a phase shift between the non-zero injections).
- An injection into the fuel oxidant / Fuel2 mixture of an identical mass of liquid fuel in the two zones Z1 and Z2 is carried out through the two plies 36 and 38 (with possibly a non-zero phase shift) for the highest loads.
- an injection of a large mass of FueM liquid fuel into the fuel / fuel fuel fuel Fuel2 is performed by the sheet 38 in the zone Z2 while an injection of a small mass of liquid fuel is carried out by the sheet 36 in the zone Z1 (possibly with a non-zero phase shift) for example during the starting phase of the motor.
- this management is controlled by a computer containing mapped engine operation maps as a function of engine speed and load, by means of management of the injection means of the various fuels as a function of engine load allowing to control the respective flow rates and proportions of Fuel2 / Fuel1 type fuel, the duration and / or the moment of injection of the Fuel 1 and / or Fuel 2 fuels and the ignition angles.
- the initiation of combustion and the combustion are distributed throughout the combustion chamber while optimizing the combustion of the oxidant / fuel fuel2 type mixture.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1452955A FR3019589B1 (en) | 2014-04-03 | 2014-04-03 | METHOD FOR FUEL INJECTION IN THE COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE OPERATING IN MONOCARBURATION OR MULTICARBURATION |
PCT/EP2015/055843 WO2015150103A1 (en) | 2014-04-03 | 2015-03-19 | Method of injecting fuel into the combustion chamber of an internal combustion engine operating in single-fuel or multiple-fuel mode |
Publications (1)
Publication Number | Publication Date |
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EP3126653A1 true EP3126653A1 (en) | 2017-02-08 |
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ID=50729718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP15711156.8A Withdrawn EP3126653A1 (en) | 2014-04-03 | 2015-03-19 | Method of injecting fuel into the combustion chamber of an internal combustion engine operating in single-fuel or multiple-fuel mode |
Country Status (5)
Country | Link |
---|---|
US (1) | US10294876B2 (en) |
EP (1) | EP3126653A1 (en) |
CN (1) | CN106164439B (en) |
FR (1) | FR3019589B1 (en) |
WO (1) | WO2015150103A1 (en) |
Families Citing this family (10)
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FR3018550B1 (en) * | 2014-03-14 | 2019-04-12 | IFP Energies Nouvelles | METHOD FOR CONTROLLING FUEL INJECTION OF AN INTERNAL COMBUSTION ENGINE WITH DIRECT INJECTION, ESPECIALLY COMPRESSION IGNITION, AND ENGINE USING SUCH A METHOD |
FR3020401B1 (en) * | 2014-04-24 | 2016-05-06 | Ifp Energies Now | DIRECT INJECTION INTERNAL COMBUSTION ENGINE HAVING A DOUBLE ANGLE OF FLOOR FOR CARRYING A CARBIDE MIXTURE IN A COMBUSTION COMBUSTION CHAMBER WITH A LOW COMBUSTION RATE AND A LOW COMPRESSION RATE AND METHOD FOR USING THE SAME. |
US10392987B2 (en) | 2017-03-29 | 2019-08-27 | Cummins Emission Solutions Inc. | Assembly and methods for NOx reducing reagent dosing with variable spray angle nozzle |
JP6485489B2 (en) * | 2017-05-23 | 2019-03-20 | マツダ株式会社 | ENGINE CONTROL DEVICE AND ENGINE CONTROL METHOD |
GB2570344B (en) * | 2018-01-23 | 2022-05-04 | Ulemco Ltd | Operating a compression ignition engine fuelled with a combination of a hydrocarbon fuel and hydrogen |
JP6888570B2 (en) * | 2018-03-07 | 2021-06-16 | トヨタ自動車株式会社 | Internal combustion engine |
DE102018108097A1 (en) * | 2018-04-05 | 2019-10-10 | Volkswagen Aktiengesellschaft | Method for operating an internal combustion engine of a drive system for a motor vehicle, drive system and motor vehicle |
US11326521B2 (en) * | 2020-06-30 | 2022-05-10 | General Electric Company | Methods of igniting liquid fuel in a turbomachine |
US11598246B2 (en) * | 2021-06-23 | 2023-03-07 | Deere & Company | Internal combustion engine and piston having piston bowl |
US11840983B2 (en) | 2022-02-22 | 2023-12-12 | Caterpillar Inc. | Low compression natural gas engine piston bowl for improved combustion stability |
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US2040972A (en) * | 1931-05-04 | 1936-05-19 | Maschf Augsburg Nuernberg Ag | Piston |
US5771847A (en) * | 1996-06-24 | 1998-06-30 | The United States Of America As Represented By The Secretary Of The Navy | Fuel oxidizer emulsion injection system |
AU2001261229A1 (en) * | 2000-05-08 | 2001-11-20 | Cummins, Inc. | Premixed charge compression ignition engine with variable speed soc control and method of operation |
US20030097997A1 (en) * | 2001-10-19 | 2003-05-29 | Lynch Robert Albert | Kit and method for converting a diesel engine to natural gas engine |
JP2003214297A (en) * | 2002-01-24 | 2003-07-30 | Yanmar Co Ltd | Fuel injection valve of diesel engine |
BRPI0409419A (en) * | 2003-04-16 | 2006-04-25 | Westport Res Inc | internal combustion engine powered by a flammable gaseous fuel, and, method for operating a internal combustion engine powered by a gaseous fuel |
FR2868480B1 (en) * | 2004-04-02 | 2008-05-02 | Peugeot Citroen Automobiles Sa | INTERNAL COMBUSTION ENGINE WITH DIRECT INJECTION |
US7243862B2 (en) * | 2004-04-07 | 2007-07-17 | Delphi Technologies, Inc. | Apparatus and method for mode-switching fuel injector nozzle |
US7185614B2 (en) * | 2004-10-28 | 2007-03-06 | Caterpillar Inc | Double bowl piston |
JP4466616B2 (en) * | 2006-06-19 | 2010-05-26 | トヨタ自動車株式会社 | Multi-fuel internal combustion engine |
US7287509B1 (en) * | 2006-08-11 | 2007-10-30 | Ford Global Technologies Llc | Direct injection alcohol engine with variable injection timing |
JP5196637B2 (en) * | 2007-09-21 | 2013-05-15 | ヤンマー株式会社 | diesel engine |
WO2012125961A1 (en) * | 2011-03-17 | 2012-09-20 | Cummins Intellectual Property, Inc. | Piston for internal combustion engine |
DE102011017479A1 (en) * | 2011-04-19 | 2012-10-25 | Daimler Ag | Internal combustion engine |
US20140299105A1 (en) * | 2011-07-27 | 2014-10-09 | Quantlogic Corporation | Methods for Low Temperature Combustion and Engines Using the Same |
KR101996085B1 (en) * | 2012-09-14 | 2019-07-03 | 두산인프라코어 주식회사 | COMBUSTION CHAMBER OF DIRECT INJECTION DIESEL ENGINE FOR REDUCING THE NOx |
US20150020765A1 (en) * | 2013-07-18 | 2015-01-22 | Electro-Motive Diesel, Inc. | Combustion bowl of piston |
FR3012523B1 (en) | 2013-10-25 | 2018-07-27 | IFP Energies Nouvelles | COMPRESSION IGNITION DIRECT INJECTION INTERNAL COMBUSTION ENGINE AND FUEL INJECTION METHOD IN THE COMBUSTION CHAMBER OF THE ENGINE. |
FR3016926B1 (en) * | 2014-01-29 | 2018-12-07 | IFP Energies Nouvelles | COMBUSTION ENGINE WITH DIRECT FUEL INJECTION, ESPECIALLY COMPRESSION IGNITION ENGINE WITH LOW COMPRESSION RATE |
-
2014
- 2014-04-03 FR FR1452955A patent/FR3019589B1/en not_active Expired - Fee Related
-
2015
- 2015-03-19 WO PCT/EP2015/055843 patent/WO2015150103A1/en active Application Filing
- 2015-03-19 EP EP15711156.8A patent/EP3126653A1/en not_active Withdrawn
- 2015-03-19 CN CN201580016741.1A patent/CN106164439B/en not_active Expired - Fee Related
- 2015-03-19 US US15/301,339 patent/US10294876B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR3019589A1 (en) | 2015-10-09 |
FR3019589B1 (en) | 2019-06-07 |
CN106164439B (en) | 2020-02-21 |
US20170114730A1 (en) | 2017-04-27 |
WO2015150103A1 (en) | 2015-10-08 |
CN106164439A (en) | 2016-11-23 |
US10294876B2 (en) | 2019-05-21 |
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