EP3707367A1 - Verfahren zum betreiben einer brennkraftmaschine, zweistoff-injektoreinrichtung und brennkraftmaschine, eingerichtet zur durchführung eines solchen verfahrens - Google Patents
Verfahren zum betreiben einer brennkraftmaschine, zweistoff-injektoreinrichtung und brennkraftmaschine, eingerichtet zur durchführung eines solchen verfahrensInfo
- Publication number
- EP3707367A1 EP3707367A1 EP18800914.6A EP18800914A EP3707367A1 EP 3707367 A1 EP3707367 A1 EP 3707367A1 EP 18800914 A EP18800914 A EP 18800914A EP 3707367 A1 EP3707367 A1 EP 3707367A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel gas
- internal combustion
- combustion engine
- combustion chamber
- ignition
- 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.)
- Pending
Links
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000002347 injection Methods 0.000 title claims description 8
- 239000007924 injection Substances 0.000 title claims description 8
- 230000009977 dual effect Effects 0.000 title description 2
- 239000002737 fuel gas Substances 0.000 claims abstract description 117
- 239000000126 substance Substances 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 239000000567 combustion gas Substances 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 9
- 239000000446 fuel Substances 0.000 description 13
- 238000009792 diffusion process Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010304 firing Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 206010061218 Inflammation Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
-
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- 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
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
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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
- F02B43/12—Methods of operating
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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
- F02B7/00—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel
- F02B7/06—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel the fuel in the charge being gaseous
- F02B7/08—Methods of operating
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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
- F02D19/0694—Injectors operating with a plurality of fuels
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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
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
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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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
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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
- F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
-
- 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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/12—Other methods of operation
- F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
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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
- F02B23/0618—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 having in-cylinder means to influence the charge motion
- F02B23/0624—Swirl flow
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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
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/0015—Controlling intake air for engines with means for controlling swirl or tumble flow, e.g. by using swirl valves
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/403—Multiple injections with pilot injections
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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
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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 invention relates to a method for operating an internal combustion engine, a two-component injector device and an internal combustion engine, which are set up for carrying out such a method.
- each fuel gas jet is clearly assigned a Zündölstahl
- the fuel gas rays preferably already come in their introduction into the combustion chamber in contact with the inflamed Zündölstrahlen and are flamed. If such a clear assignment of fuel gas on the one hand and Zündölstrahlen other hand, is not possible, usually more Zündölstrahlen are used as fuel gas jets to ensure in any case that all fuel gas rays are ignited at the same time.
- a pure diffusion combustion is disadvantageous, since at least partially premixed combustion
- the invention is based on the object, a method for operating a
- the object is achieved by providing the subject matters of the independent claims. Advantageous embodiments emerge from the subclaims.
- the object is achieved in particular by providing a method for operating an internal combustion engine, which comprises the following steps: At least two fuel gas streams are simultaneously introduced into a combustion chamber of the internal combustion engine. A first fuel gas jet of the at least two fuel gas jets becomes a
- Inflammation time inflamed It is provided that in a first operating mode of the internal combustion engine, a second, different from the first fuel gas jet fuel gas of the at least two fuel gas jets is ignited in time after the ignition time.
- a combination of a diffusion combustion and a premixed combustion is provided in the first mode, wherein the first fuel gas jet burns in particular by means of diffusion combustion, wherein the second fuel gas jet due to its later ignition more time is available, with in the combustion chamber existing combustion air to mix so that it can burn at least partially in the form of premixed combustion.
- the combustion is split up into two firing events, whereby a broadened pressure maximum or two separate pressure maxima are present in the combustion chamber in terms of time.
- it is possible to increase the indicated mean pressure for a given peak pressure wherein in particular a constant pressure process is better approximated than in conventional combustion management, in particular by the pressure in the combustion chamber for a longer time in the vicinity of
- Peak pressure value is maintained. If a distance to a maximum possible - especially defined by load limits of the combustion chamber - maintained peak pressure, the approach to a Gleichraum perspectives is possible. With regard to emissions of the internal combustion engine, the proportions of the diffusion combustion on the one hand and the premixed combustion on the other hand can be optimized. By premixing the fuel of the second fuel gas jet is locally emaciated, so that the flame temperature drops and lower emissions occur.
- the implementation of the method is not limited to dual-fuel internal combustion engines. It is only important that a plurality of fuel gas rays are introduced directly into the combustion chamber, wherein at least one of the fuel gas jets is ignited later than at least one other fuel gas jet of the fuel gas.
- the method is particularly preferably used in a two-component operation of an internal combustion engine. That the fuel gas rays are introduced at the same time in the combustion chamber, means in particular that they are introduced to a possibly unavoidable, technically caused time offset at the same time in the combustion chamber.
- the various fuel gas jets are therefore not fuel gas rays, the
- An introduction of the fuel gas jets directly into the combustion chamber is understood in particular to be a direct injection, preferably by means of a fuel gas injector.
- the second fuel gas jet is ignited by the flamed first fuel gas jet.
- the flame front of the flamed first fuel gas jet spreads in the combustion chamber and detected after a certain time, the second fuel gas jet, which then by the inflamed first
- Fuel gas jet and in particular by the combustion products of the first fuel gas jet is ignited.
- the second fuel gas jet is already locally emaciated and mixed with combustion air, so that a very fast implementation of the premixed second fuel gas jet with rapid increase in pressure takes place in the combustion chamber.
- the first fuel gas jet is ignited by a pilot injection of an ignition oil into the combustion chamber.
- the second fuel gas jet is spatially so far from the particular Zündölstrahl and the first fuel gas jet that he is not inflamed by the particular Zündölstahl. Rather, it is only later ignited by the inflamed first fuel gas jet.
- a plurality of more than two fuel gas radiations are introduced into the combustion chamber of the internal combustion engine at the same time, preferably each fuel gas jet of a minority of the fuel gas radiate, which is smaller than the total number of fuel gas, each associated with a Zündölstahl. Those fuel gas radiate, which is assigned no Zündölstrahl, are then only at a later date by the inflamed
- Fuel gas is on fire.
- the internal combustion engine parameter-dependent - alternative to the first mode - is operated in a second mode in which all fuel gas rays are ignited simultaneously at the time of ignition. In this second mode, a diffusion combustion is then realized.
- the second operating mode is set in particular as a function of at least one operating parameter of the internal combustion engine, wherein as the at least one operating parameter preferably a momentary load point of the internal combustion engine is used. Depending on the at least one operating parameter, the internal combustion engine is then operated either in the first operating mode or in the second operating mode. Particularly preferred is the
- the internal combustion engine is preferably operated in the first mode, the higher premix combustion would lead to higher peak pressures for a given fuel mass and detained ignition point, but this is not harmful at part load or at idle, because here in the
- Combustion chamber fuel mass is reduced compared to the full load, so that in turn the higher peak pressures are also reduced. Therefore, the internal combustion engine can be operated without damage at partial load and / or idling in the first mode. Thus, a constant pressure process can be better approximated, resulting in efficiency advantages and reduced emissions.
- Premix combustion and diffusion combustion in particular with regard to the emissions of the internal combustion engine, for a thermal management of the internal combustion engine, and also for the approximation of a Gleichraumreaes while maintaining peak pressure reserves.
- switching between the first operating mode and the second operating mode is performed by changing a charge swirl in the combustion chamber.
- the fuel gas on the one hand and the Zündölstahlen other hand - seen in cross section - are aligned radially to the longitudinal axis of the combustion chamber, with each Zündölstahl a fuel gas jet can be clearly assigned. From a certain strength of a charge spin in the combustion chamber, however, at least the
- Fuel gas rays can also be ignited by Zündölstrahlen that are not directly associated with them.
- Zündölstrahlen it is possible that with a corresponding charge spin in the combustion chamber all fuel gas jets are ignited by the Zündölstrahlen. Therefore, it is possible to switch from the first mode to the second mode by increasing the charge swirl in the combustion chamber. Conversely, it is possible to switch from the second operating mode back to the first operating mode by reducing the charge swirl in the combustion chamber.
- a charge swirl in the combustion chamber is understood to mean in particular a rotating movement of combustion air in the combustion chamber about the longitudinal axis of the combustion chamber.
- Timing can be introduced at a lower charge spin into the combustion chamber, where they can be introduced into the combustion chamber at a second time different from the first time at a higher charge spin.
- Combustion chamber is changed by the control of a combustion chamber associated variable valve train is changed.
- a variable valve train particularly preferably a fully variable valve train
- the charge movement in the combustion chamber and in particular the charge spin can be influenced. It is therefore possible to switch between the first mode by driving the variable valve train.
- the object is also achieved by providing a dual-substance injector device adapted for introducing a fuel gas and an ignition oil directly into a combustion chamber of an internal combustion engine, the dual-substance injector device radiating a first number of first bores for discharging a plurality of fuel gas, and a second number of second bores for discharging a plurality of ignition oil jets, wherein the first number of the first bores is greater than the second number of the second bores.
- each second bore is preferably assigned a first bore, with first bores existing, to which no second bore is assigned.
- each second bore is assigned a first bore for igniting the respective fuel gas jet of the first bore by the discharged from the second bore ignition oil.
- the second holes on the one hand and the first holes on the other hand preferably spatially / geometrically arranged so that the corresponding fixed assignment of the second holes is obtained to the respective first holes.
- the first holes and the second holes are arranged axially offset from each other. So they are in particular - seen in the longitudinal direction of the combustion chamber - arranged on different levels.
- the first bores are arranged above the second bores, d. H. on one side of the second bores, which faces away from a displaceable arranged in the combustion chamber piston. In this way, the fuel gas can be ignited by the underlying them Zündölstrahlen.
- an axial direction is, in particular, a longitudinal direction of the two-component injector device, which is preferably aligned with the longitudinal axis of the combustion chamber when the device is disposed according to the instructions.
- a radial direction is perpendicular to the axial direction.
- a circumferential direction concentrically surrounds the axial direction.
- each of the second bores is aligned with an associated first bore - as seen in the circumferential direction.
- the mutually associated first and second bores are thus axially in each case in a same angular position one above the other. In this way, it is ensured very efficiently that only the combustion gas jets assigned to the second bores are ignited by the ignition oil.
- the mutually associated first and second holes can also be arranged offset in the circumferential direction to one another, in particular to a gap.
- Ladungsdralls in the combustion chamber and in particular an ignition delay can then also just a partial ignition of the fuel gas rays result directly by the Zündölstrahlen.
- the object is also achieved by providing an internal combustion engine which is set up for carrying out a method according to the invention or a method according to one of the claims previously described embodiments.
- the internal combustion engine particularly preferably has a two-component injector device according to the invention or a two-component injector device according to one of the exemplary embodiments described above.
- Internal combustion engine preferably has a variable valve train associated with the at least one combustion chamber, and / or energization times for the dual-substance injector device are variable in the internal combustion engine.
- the internal combustion engine is preferably designed as a reciprocating engine. It is possible that the internal combustion engine is arranged to drive a passenger car, a truck or a commercial vehicle. In a preferred embodiment, the internal combustion engine is the drive in particular heavy land or water vehicles, such as mine vehicles, trains, the internal combustion engine in a
- Locomotive or a railcar is used, or by ships. It is also possible to use the internal combustion engine to drive a defense vehicle, for example a tank.
- An exemplary embodiment of the internal combustion engine is preferably also stationary, for example, for stationary power supply in emergency operation,
- the internal combustion engine in this case preferably drives a generator. Also a stationary application of
- Internal combustion engine for driving auxiliary equipment such as fire pumps on oil rigs
- an application of the internal combustion engine in the field of promoting fossil raw materials and in particular fuels, for example oil and / or gas possible.
- the internal combustion engine is preferably designed as a diesel engine, as a gasoline engine, as a gas engine for operation with natural gas, biogas, special gas or another suitable gas.
- the internal combustion engine is designed as a gas engine, it is suitable for use in a cogeneration plant for stationary power generation.
- the description of the method on the one hand and the two-component injector device and the internal combustion engine on the other hand are to be understood as complementary to one another.
- Steps of the method which have been described explicitly or implicitly in connection with the dual-substance injector device and / or the internal combustion engine are preferably individually or combined with one another
- the method is preferably characterized by at least one method step, which is caused by at least one feature of an inventive or preferred embodiment of the two-component injector device or the internal combustion engine.
- the dual-substance injector device and / or the internal combustion engine preferably draws / distinguishes itself by at least one feature, which is due to at least one step of a preferred embodiment of the method according to the invention or a preferred embodiment.
- Fig. 1 is a schematic representation of an embodiment of a
- Fig. 2 is a detail of the embodiment of the internal combustion engine according to
- Fig. 3 is a schematic, diagrammatic representation of the operation of a
- Fig.l shows a schematic representation of an embodiment of an internal combustion engine 1 with a combustion chamber 3.
- the internal combustion engine 1 a plurality of combustion chambers 3, wherein the combustion chambers 3 are preferably formed identical. It is possible that the internal combustion engine 1 in particular has four, six, eight, ten, twelve, fourteen, sixteen, eighteen or twenty combustion chambers 3.
- the internal combustion engine 1 is preferably designed as a reciprocating engine, wherein in the
- Combustion chamber 3 a piston 5 is displaced in a liftable manner.
- the internal combustion engine 1 has a two-component injector device 7, which is set up for introducing a fuel gas on the one hand and an ignition oil on the other hand directly into the
- the dual-substance injector device 7 also has a second number of second bores 11 for discharging a plurality of
- the first number of first holes 9 is greater than the second number of second holes 11.
- a method for operating the internal combustion engine 1 that at least two fuel gas from the first holes 9 are simultaneously introduced directly into the combustion chamber 3, wherein a first fuel gas jet of at least two fuel gas rays is inflamed to a time of ignition. It is further provided that in a first mode of operation of the internal combustion engine 1, a second jet of the first fuel gas different fuel gas jet of at least two fuel gas jets is ignited in time after the ignition time. In this way, in the first operating mode, a combination of diffusion combustion on the one hand and premixed
- combustion can be realized, which in particular increases in performance at constant peak pressure, efficiency increases, as well as an improved approximation to a constant pressure process are possible.
- the second fuel gas jet is ignited by the ignited first fuel gas jet, wherein it is particularly flamed by combustion products of the first fuel gas jet.
- the first fuel gas jet is preferred by the first fuel gas jet
- the dual-substance injector device 7 preferably has nine first bores 9 and six second bores 11, so that in the context of the method a total of nine
- Each second bore 11 is preferably assigned a first bore 9 for igniting the respective fuel gas jet by the correspondingly assigned Zündölstrahl, the bores 9, 11 are arranged in particular so relative to each other that a
- Fuel gas rays are ignited, the first holes 9 a second hole 11 is assigned.
- first holes 9 and the second holes 11 are arranged axially offset from each other, wherein preferably each second bore 11 with a first associated bore 9 - aligned in the circumferential direction - aligned.
- Circumferential direction extends concentrically around a longitudinal axis of the combustion chamber 3, in Figure 1 about a vertical center axis of the combustion chamber 3.
- the associated first and second holes 9, 11 may be arranged offset in the circumferential direction to each other, in particular gap.
- the first holes 9 and the second holes 11 are distributed in the circumferential direction - preferably symmetrically - in particular with each within the same bore, ie within the first holes 9 and the second holes 11, equal angular distances from each other, arranged. It is preferably provided that each first bore 9, which is associated with a non-flammable fuel gas jet in the first mode, is enclosed between two first holes 9, which are assigned in the first mode at the time of ignition flammable fuel gas rays.
- the internal combustion engine 1 is preferably operated depending on parameters in a second mode in which the fuel gas radiate all at the same time be ignited at the time of ignition. Between the first operating mode and the second operating mode is preferably changed depending on at least one parameter, wherein as the at least one parameter preferably an instantaneous load point of the internal combustion engine is used.
- the internal combustion engine is preferably operated at full load in the second mode, wherein it is operated at partial load or idle in the first mode, ie with a higher proportion of premixed combustion.
- variable valve drive 13 is preferably provided, wherein the combustion chamber 3 here an intake valve 15 and an exhaust valve 17 are assigned, wherein both the intake valve 15 and the exhaust valve 17, a variable valve train 13 is associated. But it is also possible that only one gas exchange valve, selected from the inlet valve 15 and the exhaust valve 17, a variable valve train 13 is associated. In particular, it may be sufficient for the swirl change if the inlet valve 15 is assigned a variable valve drive 13. In particular, to control the change between the first mode and the second
- FIG. 2 shows a detail of the two-substance injector device 7, namely in the form of a schematic partial cross-sectional view along an angular range of 120 °, wherein the dual-substance injector device 7 is preferably rotationally symmetrical, so that the entire cross-section is formed by copying the structure shown in FIG remaining two 120 ° segments can be obtained.
- the dual-substance injector device 7 here has a total of nine first bores 9, of which three first bores 9 are shown here, and six second bores 11, of which two second bores 11 are shown here.
- each of the outer first holes 9 is assigned a second bore 11, so that the expelled through the outer first holes 9
- Fuel gas rays are ignited by emerging from the second holes 11 Zündölstrahlen.
- the middle first bore 9 no second bore 11 is assigned, so that an emerging from the central bore 9 fuel gas jet - depending in particular from the time of introduction and a momentary charge spin in the combustion chamber 3 at the time of introduction - in the first mode of operation not to the
- the ignition time is ignited by the Zündölstrahlen. Rather, it is ignited only at a later time by the inflamed, external fuel gas jets, after some pre-mixing with the combustion air present in the combustion chamber 3 has already taken place.
- a charge swirl in the combustion chamber 3 is high enough so that the fuel gas jets on the one hand and the ignition oil jets on the other hand are adequately blown so that all fuel gas jets are ignited by the ignition oil jets at the time of ignition.
- FIG. 3 shows a schematic, diagrammatic representation of an embodiment of a method for operating the internal combustion engine.
- a pressure-volume diagram is recorded, wherein on the vertical axis a pressure p is plotted in the combustion chamber, wherein on the horizontal axis an instantaneous volume V of the combustion chamber 3 is shown.
- Kl is the pressure curve in the second mode of the
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017220108.8A DE102017220108A1 (de) | 2017-11-10 | 2017-11-10 | Verfahren zum Betreiben einer Brennkraftmaschine, Zweistoff-Injektoreinrichtung und Brennkraftmaschine, eingerichtet zur Durchführung eines solchen Verfahrens |
PCT/EP2018/080679 WO2019092143A1 (de) | 2017-11-10 | 2018-11-08 | Verfahren zum betreiben einer brennkraftmaschine, zweistoff-injektoreinrichtung und brennkraftmaschine, eingerichtet zur durchführung eines solchen verfahrens |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3707367A1 true EP3707367A1 (de) | 2020-09-16 |
Family
ID=64277682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18800914.6A Pending EP3707367A1 (de) | 2017-11-10 | 2018-11-08 | Verfahren zum betreiben einer brennkraftmaschine, zweistoff-injektoreinrichtung und brennkraftmaschine, eingerichtet zur durchführung eines solchen verfahrens |
Country Status (5)
Country | Link |
---|---|
US (1) | US11187140B2 (de) |
EP (1) | EP3707367A1 (de) |
CN (1) | CN111279064B (de) |
DE (1) | DE102017220108A1 (de) |
WO (1) | WO2019092143A1 (de) |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4748949A (en) * | 1985-02-05 | 1988-06-07 | Sulzer Brothers Limited | Method and system for injecting a pilot fuel into a combustion chamber |
US5365902A (en) * | 1993-09-10 | 1994-11-22 | General Electric Company | Method and apparatus for introducing fuel into a duel fuel system using the H-combustion process |
EP1255923B1 (de) * | 2000-02-11 | 2006-04-12 | Westport Research Inc. | Einspritzverfahren und vorrichtung für zwei brennstoffe in einer brenkraftmaschine |
US7040281B2 (en) * | 2000-10-22 | 2006-05-09 | Westport Research Inc. | Method of injecting a gaseous fuel into an internal combustion engine |
AU2002224786A1 (en) * | 2000-10-22 | 2002-04-29 | Westport Germany Gmbh | Internal combustion engine with injection of gaseous fuel |
JP2007211764A (ja) * | 2006-02-10 | 2007-08-23 | Masahiro Yuki | デュエルフューエルエンジンの燃料噴射装置で、バイオマスガスと化石燃料を単一のインジェクターノズルより、個別に制御された条件で2種類の燃料を爆発工程において個別噴射出来るデュエルフューエルインジェクターノズル及び制御装置。 |
CA2539711C (en) * | 2006-03-31 | 2009-06-09 | Westport Research Inc. | Method and apparatus of fuelling an internal combustion engine with hydrogen and methane |
WO2012051183A2 (en) * | 2010-10-11 | 2012-04-19 | Deyang Hou | A fuel injector with a variable orifice |
FI123513B (fi) * | 2010-12-02 | 2013-06-14 | Waertsilae Finland Oy | Polttoaineen syöttöyksikkö, menetelmä sen käyttämiseksi ja polttomoottori |
US8459576B2 (en) | 2011-01-26 | 2013-06-11 | Caterpillar Inc. | Dual fuel injector for a common rail system |
US8683979B2 (en) * | 2011-02-14 | 2014-04-01 | Caterpillar Inc. | Dual fuel common rail system and engine using same |
US9664074B2 (en) | 2011-02-14 | 2017-05-30 | Joshua Aaron Tolbert | Variable valve timing device for internal combustion engines utilizing hydraulic valve actuators |
WO2013016713A2 (en) * | 2011-07-27 | 2013-01-31 | Deyang Hou | Methods for low temperature combustion and engines using the same |
US8844842B2 (en) | 2011-08-12 | 2014-09-30 | Caterpillar Inc. | Three-way needle control valve and dual fuel injection system using same |
US20140373806A1 (en) * | 2012-01-05 | 2014-12-25 | Deyang Hou | Fuel injector for multi-fuel injection with pressure intensification and a variable orifice |
CA2767247C (en) * | 2012-02-07 | 2014-03-25 | Westport Power Inc. | Apparatus and method for igniting a gaseous fuel in a direct injection internal combustion engine |
DE102012002897B4 (de) * | 2012-02-14 | 2016-02-11 | Daimler Ag | Verbrennungskraftmaschine, insbesondere für einen Kraftwagen |
DE102015225073A1 (de) * | 2015-12-14 | 2017-06-14 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102016003398A1 (de) * | 2016-03-19 | 2017-09-21 | L'orange Gmbh | Brenngasinjektor |
-
2017
- 2017-11-10 DE DE102017220108.8A patent/DE102017220108A1/de not_active Withdrawn
-
2018
- 2018-11-08 WO PCT/EP2018/080679 patent/WO2019092143A1/de unknown
- 2018-11-08 CN CN201880072344.XA patent/CN111279064B/zh active Active
- 2018-11-08 EP EP18800914.6A patent/EP3707367A1/de active Pending
-
2020
- 2020-03-25 US US16/829,715 patent/US11187140B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN111279064B (zh) | 2022-05-17 |
WO2019092143A1 (de) | 2019-05-16 |
DE102017220108A1 (de) | 2019-05-16 |
US11187140B2 (en) | 2021-11-30 |
CN111279064A (zh) | 2020-06-12 |
US20200240320A1 (en) | 2020-07-30 |
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