WO2019157581A1 - Configuration de moteur et procédé de fonctionnement - Google Patents

Configuration de moteur et procédé de fonctionnement Download PDF

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Publication number
WO2019157581A1
WO2019157581A1 PCT/BR2019/050044 BR2019050044W WO2019157581A1 WO 2019157581 A1 WO2019157581 A1 WO 2019157581A1 BR 2019050044 W BR2019050044 W BR 2019050044W WO 2019157581 A1 WO2019157581 A1 WO 2019157581A1
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WO
WIPO (PCT)
Prior art keywords
reformer
fuel
egr
evaporator
exhaust gas
Prior art date
Application number
PCT/BR2019/050044
Other languages
English (en)
Portuguese (pt)
Inventor
Gustavo HINDI
Rafael SANTOS
Paul Kapus
Marko Certic
Michael Reissig
Original Assignee
Fca Fiat Chrysler Automoveis Brasil Ltda.
Avl List Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fca Fiat Chrysler Automoveis Brasil Ltda., Avl List Gmbh filed Critical Fca Fiat Chrysler Automoveis Brasil Ltda.
Priority to BR112020016718-5A priority Critical patent/BR112020016718A2/pt
Publication of WO2019157581A1 publication Critical patent/WO2019157581A1/fr

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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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/36—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for adding fluids other than exhaust gas to the recirculation passage; with reformers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/02—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to oxygen-fed engines
    • F02D21/04—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to oxygen-fed engines with circulation of exhaust gases in closed or semi-closed circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/025—Adding water
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/10—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/27—Layout, e.g. schematics with air-cooled heat exchangers
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • 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
    • F02M27/00—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like
    • F02M27/02—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like by catalysts
    • 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

Definitions

  • the invention relates to an internal combustion engine with an EGR line that connects the exhaust line to the engine air intake.
  • EGR line In the EGR line there is the return of the exhaust gas to the intake manifold, in this EGR circuit there is also a fuel reformer for steam reforming through a Catalytic Reformer and also having an evaporator for the fuel.
  • the EGR line is organized to reform the fuel along with the recirculated exhaust gas that is introduced into the inlet of the internal combustion engine.
  • the invention relates to a procedure for operating an internal combustion engine which is provided with an exhaust gas recirculation line (EGR) for driving it to the engine inlet.
  • EGR exhaust gas recirculation line
  • an evaporator that vaporizes the fuel and it is injected vaporized in a catalytic reformer that is also in the EGR line along with the exhaust gases.
  • catalytic reform within the reformer.
  • EGR Exhaust Gas Recirculation
  • the object of the present invention is to maximize the efficiency of the internal combustion engine by applying the fuel reformer to it.
  • the processes in a reformer may be influenced by the construction and structuring of a direct catalyst.
  • a special effect of this would be that, through the fuel reformer, the EGR flow in the engine could increase while maintaining combustion. This increases the EGR index within the current range of 30% to 45%. In a particularly favorable procedure, therefore, the EGR index corresponds to more than 30% and up to 45%, and preferably between 40% and 45%.
  • This increase in the EGR index is directly dependent on the amount of hydrogen created by the reformer.
  • the configuration according to the invention by using system heating, allows sufficient fuel to be injected to form hydrogen.
  • the fuel, the which is transferred to the catalyst remains in the form of gaseous fuel or fuel vapor, for example in the form of gaseous gasoline or ethanol.
  • the transfer of fuel by the reformer by increasing the heating and, among others, for the improvement of hydrogen concentration is followed.
  • the exhaust gas line is connected to the fuel evaporator and the catalyst / reformer as a function of heat exchange with them.
  • the heat exchanger is mounted on the exhaust gas line and the exhaust gases are conducted through the heat exchanger and heat it.
  • the heat exchanger side is connected with the reformer / catalyst and / or the heat transfer evaporator for these elements.
  • the reformer reforming process is endothermic, ie the temperature reduces in the direction of flow over the reformer / catalyst extension. This is expected and also desired: when the temperature drops, the better the efficiency increase. It is therefore advantageous for the flow through the reformer to be as hot as possible by heat transfer with the exhaust gas.
  • the special advantage is that the reformer is heated most of the time through the exhaust gases.
  • a typical catalyst works only from about 300 and C to 450 and C, especially from 350 and C to 400 and C, ie fuel reforming occurs only above such temperatures.
  • high temperatures need to occur in the reformer.
  • the recirculated gas temperature is not sufficient for fuel overhaul to occur.
  • the special advantage is that when the exhaust gas line heats the side-mounted heat exchanger of the reformer / catalyst, a higher operating temperature is created.
  • the EGR conductor may comprise two partial conductors. This forms the first part of the EGR partial conductor through which the recirculating exhaust gas is fed into the evaporator or reformer.
  • the first partial EGR conductor is mounted in front of the evaporator or reformer flow.
  • a second partial EGR conductor is mounted against the reformer flow. It is either transferred in recirculating exhaust as well as fuel or a mixture of hydrogen-fuel in steam or reformed in a combustion engine. If the heat exchanger is mounted on the exhaust gas line exclusively for the reformer / catalyst heating, another heat exchanger is favorable. This can favorably be mounted with a heated side on the second EGR partial conductor, including in the reverse direction of reformer flow, and heat transfer to the evaporator is formed.
  • the evaporator does not require such high operating temperatures, depending on the fuel to be evaporated or the hydrogen-fuel mixture, such as the reformer, heat transfer from the EGR conductors is sufficient. With this, all heat is transferred from the exhaust gas range to the reformer catalyst. Basically, however, it is favorable that both the heat exchanger mounted on the exhaust gas line and the heat exchanger transfer heat to the evaporator. By using the heat from the exhaust or recirculating gases in the EGR conductor, the outlet gas - including the catalyst inlet - will be kept at the maximum possible temperature from the vaporizer. This maximizes energy recovery.
  • the evaporator is mounted on the EGR line in the reverse direction of the reformer flow.
  • the recirculating exhaust gas will be partly directed to the catalyst and partly to the evaporator.
  • the evaporator be connected to the fuel source, with the evaporator being responsible for transferring part of the fuel (AK).
  • AK part of the fuel
  • they will be transferred by the evaporator approx. 15% to 35%, and preferably from 20% to 30%, in particular 25% or 30%, of a total amount of fuel.
  • This is followed by a reduction in the amount of fuel which is transferred directly to the combustion engine to maintain this value.
  • the advantage is that there is at least one valve for increased fuel transfer to the evaporator.
  • the fuel will then be completely or nearly completely vaporized in the evaporator so that the fuel turns gas from the evaporator in the reverse direction of the stream and the latter is transferred to the reformer and / or catalyst.
  • a gas-shaped fuel temperature rises before or continuously in the catalyst. The gas-shaped fuel is heated and is especially overheated in the assembled structure.
  • an evaporator with a connected water source may be connected so that water and fuel are vaporized as a water-fuel mixture.
  • process vaporization and / or reforming will occur, in particular by preventing the formation of rust.
  • the advantage is that fuel and water are mixed at a predetermined ratio and / or predetermined time. Thus, it is expected that the flammable and the water will be mixed together in the reverse direction of the flow, or separated from each other when introduced into the vaporizer.
  • the advantage is that the evaporator of such type is mounted separately from the reformer with the catalyst having these differentiated conductors.
  • the advantage is that the evaporator and catalyst are mounted in separate compartments, which is called reformer.
  • a transfer conductor is provided for directing the vaporized fuel or the vaporized water and fuel mixture to the reformer.
  • the special advantage is that the reformer is mounted with the catalyst in the EGR duct, but the evaporator is not mounted on the EGR conductor. The important thing is that the evaporator, with respect to fuel transfer, is mounted in the direction of reformer flow. The reformer reverse direction will then route the vaporized fuel or water-fuel mixture into the EGR conductor, or directly into the EGR conductor with the evaporator mounted with the catalyst.
  • the reformer may also be advantageous for the reformer to be mounted with the catalyst and evaporator in the EGR duct.
  • the reformer is mounted with the catalyst in the reverse direction of the evaporator flow, both fuel and eventually recirculated water flowing through the evaporator and reformer.
  • the evaporator and reformer are formed of the catalyst as a complete component or assembled into a complete assembly, the reformer comprising a catalyst and an evaporator. In this way, in particular, it is not necessary for the evaporator to heat by means of its own heat transfer.
  • a recirculating exhaust gas temperature in the EGR duct is sufficient to vaporize the flammable transferred to the evaporator.
  • the purpose is for the reformer to be assembled together with the catalyst coated catalyst / reformer.
  • the reformer is at least partially coated with a catalytic material. This means fewer components are required, saving space throughout the engine structure.
  • the catalytic material makes it possible to reform the fuel or water-fuel mixture.
  • the advantage is that when an EGR chiller is connected with the heat exchange vaporizer, the EGR chiller is mounted on the EGR line in the flow direction to the reformer, and shaped like another heat exchanger. In this way, the heat of the EGR chiller in particular is directly used for evaporator heating.
  • the EGR chiller thus forms the advantage of other heat exchangers presented above, not requiring its own component.
  • the EGR chiller is mounted on the second partial exhaust gas conductor.
  • At least one heat exchange heat exchanger formed with the reformer catalyst and / or the evaporator, and mounted in the flow direction for at least one exhaust gas cleaning equipment. .
  • the combustion engine may function as a Miller cycle engine or Atkinson cycle engine.
  • the advantage exists when this engine operates as a Miller cycle.
  • the simulations show that a special increase in the efficiency level is obtained in the engine configuration when it runs on a Miller cycle in the combustion engine according to the invention, that is, the combustion engine inlet valves are previously closed at the actual inlet and that the geometric compression ratio of the motor is between 11 and 14, in particular between 12 and 13, and preferably approx. 11, 5.
  • the engine configuration according to the invention is especially advantageous in a Miller engine.
  • the compression ratio may be stay at approx. 15. In this way, by mixing hydrogen with the transferred exhaust gas, the EGR index can clearly increase.
  • an Atkinson cycle motor it is understood that a motor operates in a cycle in which the inlet valve closes later, as opposed to the Miller cycle motor, whose inlet valves are previously closed.
  • a turbine is favorable for a turbine to be mounted on the exhaust gas line, preferably after EGR inlet to generate an increase in EGR flow.
  • the EGR duct has a fork before the exhaust gas turbine.
  • This special engine configuration is ideal for application with ethanol or gasoline as a fuel. A favorable 30% of this is vaporized as described above and catalytically reformed.
  • Another additional objective is achieved if in a method mentioned above at least the reformer catalyst from the internal combustion engine exhaust gas is heated.
  • the exhaust gas heat is used at least for the catalyst reformer to heat a predetermined operating temperature. This not only makes energy that is usually discharged unnecessarily into the environment, it is used at least for a heat transfer.
  • the reforming process is optimized so that hydrogen is generated allowing extremely high EGR levels.
  • the reformer is mounted on the EGR line and related process, a portion of the exhaust gases are driven by the EGR line on the reformer, and the exhaust gases are mixed into the vaporized fuel from the evaporator;
  • the reformer catalyst is heated by the heat of the exhaust gases in the EGR line.
  • the evaporator and catalytic reformer are transferred at a minimum before an entrance to the reformer catalyst on a cold side of a gas strip. mounted on the heat exchanger.
  • the recirculating exhaust gas is conducted on the EGR line, in the direction of flow of the coated catalytic reformer mounted on the EGR line through the heat exchanger and mounted on the EGR line. exhaustion.
  • heat from the recirculating exhaust gases is transferred to the coated catalytic reformer bringing it to a required operating temperature.
  • part of the fuel which will be transferred to the evaporator, is driven in the direction of the recirculated gas flow.
  • the heat exchanger will form 3 heat exchange pathways. Fuel evaporated by this heat will be reformed in the heated catalytic reformer.
  • the fuel which is transferred by the evaporator, is driven in the reverse direction of the evaporator flow by another heat exchanger.
  • This other heat exchanger is mounted, in particular, on the EGR line in the reverse direction of the reformer flow, thereby forming an EGR chiller.
  • a special additional effect is that by refueling the engine increases the EGR flow tolerance.
  • an increase in the EGR index of approximately 30% is noted at the current ceilings, possibly reaching 45%.
  • the EGR index can reach over 30% and up to 45%, and preferably between 40% and 45%.
  • a special configuration is provided that injects fuel from the evaporator in the direction of EGR flow prior to the catalytic reformer, and in a corresponding process, the exhaust gases and the vaporized fuel are mixed. In this way, the process and chemical transformation in the catalyst are especially favored.
  • the EGR index is optimized by fuel metering at the engine and / or reformer (evaporator and / or catalyst) at an injection site (time in engine cycle) by allocating a turbocharger (waste gate or VTG position) and / or by applying secondary ventilation of such a type as to ensure rapid heating of the reformer.
  • a turbocharger waste gate or VTG position
  • secondary ventilation of such a type as to ensure rapid heating of the reformer.
  • the model is especially favorable for the efficiency level when the combustion engine has a water injector which can be located in the intake manifold, in the combustion chamber, via direct injection or on the EGR line.
  • Fig. 1 shows an engine configuration according to the invention in its first presentation
  • Fig. 2 shows an engine configuration according to the invention in a second embodiment
  • Fig. 3 shows an engine configuration according to the invention in a third embodiment
  • Fig. 4 shows an engine configuration according to the invention in a fourth embodiment
  • Fig. 5 shows a reformer in the first, second, third and fourth embodiments in schematic representation.
  • FIG. 1 An engine configuration according to the invention in the first embodiment, as shown in Fig. 1, first identified by a combustion engine 1, which operates on fuel K.
  • the charge air L is supplied by means of of intake 3 on combustion engine 1.
  • Inlet range 3 identifies, in the embodiment shown, a heated film air mass meter 3a, a compressor 3b, a charged air cooler 3c, and a 3d valve, which operate in the sequence of charge air L and supply the combustion engine 1.
  • Exhaust gas A from combustion engine 1 is conveyed via the exhaust gas line 4.
  • Exhaust gas range 4 in the embodiment shown has a turbine 4 a, a cleaning equipment 4b, and heat exchange equipment 4c, flowing exhaust gas A assembled together with the exhaust gas strip 4.
  • Turbine 4a and compressor 3b are mechanically connected to each other via an axis 5 , shown in stripes in Fig. 1.
  • This construction group with turbine 4a, compressor 3b and axle connection mechanism 5 represent a typical exhaust gas turbocharger.
  • a reformer 6 In addition to these components, there is also a reformer 6, a vaporizer 7 and a catalyst 8.
  • an EGR tube 11 is provided for the recirculation of exhaust gas A from the exhaust gas line. 4 for engine inlet 3.
  • the reformer 6 In the EGR 1 1 line the reformer 6 with an EGR 1 1 cooler and an EGR 1 1 b valve are mounted. Exhaust gases A flow into reformer 6 and pass through catalytic reformer 8.
  • An AK part of fuel 2 (with or preferably without additional mixed water), which injects up to 30% of the total fuel into combustion engine 1 at this time, will still be driven by reformer 6.
  • the AK portion of fuel passes through the evaporator 7, vaporizing it, and finally mixing it with the exhaust gas A from the EGR conductor 1 1.
  • This mixture will be conducted catalytic reformer 8 and will flow into a chemical reaction.
  • Reformed gas G which contains the reformed fuel, will be conducted from the EGR 11 conductor to the cooled EGR 11 1a, and cooled, and the mass stream of the reformed G gases will be controlled via the EGR valve.
  • the reformed gas G will flow into the intake line 3 and mix with the intake air L, leading to the internal combustion engine 1.
  • This engine configuration applies a combined method for additional heating of catalytic reformer 8 by exhaust gas A in conductor EGR 1 1 and by heating exhaust gas A in exhaust gas range 4: through heat exchange equipment 4c, heat Q1 from exhaust gas A will be transferred to catalytic reformer 8, and an endothermic reaction will be sustained by additional heat Q1. Catalytic reformer 8 will then be heated and will provide a chemical reaction in catalytic reformer 8 with additional energy.
  • the amount of fuel K which is up to 30%, will be reformed in catalytic reformer 6 with or without water.
  • the share of fuel K injected directly into the unreformed combustion engine 1 therefore corresponds to more than 70% of the total volume.
  • the EGR conductor 11 identifies a first EGR 12 partial conductor and a second EGR partial conductor 13.
  • the first EGR 12 partial conductor will be exhaust gas A recirculating in reformer 6.
  • the first EGR partial conductor 12 is mounted towards the reformer chain.
  • the second EGR 13 partial conductor is mounted in the reverse direction of the reformer current. In these, both recirculating exhaust gases A, vaporized and reformed fuel, or the water-vaporized or reformed fuel mixture are redirected to the internal combustion engine 1.
  • Fig. 2 a second presentation of the fuel reforming engine configuration K is shown which acts to improve the efficiency level.
  • heat exchange equipment 4c is provided in the exhaust gas range 4. It is also mounted in accordance with the exhaust gas cleaning equipment 4b.
  • the reformer 6 is mounted in the same manner as in the first presentation on the EGR conductor 11.
  • the catalyst 8 is heated by heat exchange equipment 4c with additional heating Q1 and by heating the exhaust gases A in the EGR conductor 1 1.
  • EGR chiller 1 a Another improvement can be achieved when even EGR chiller 1 a is used for heat transfer to reformer 6.
  • a second heat stream Q2 is conducted from EGR chiller 1 a to evaporator 7, and heat from heat stream Q2 is applied to vaporization of AK fuel.
  • a third heat stream Q3 will be conducted from heat exchange equipment 4c, possibly to reformer evaporator 7, and applied to vaporization of fuel AK.
  • Possible configurations are possible in which the second heating current Q2 or the third heating current Q3 are not used for the evaporator.
  • Fig. 3 a third configuration is shown, in which the mass from the first EGR 12 partial conductor and the fuel conductor are otherwise: the first EGR 12 partial conductor conducts the exhaust gas to the reformer. 8.
  • the AK fuel portion is directed to the evaporator 7 and first partial conductor EGR 12.
  • catalytic reformer 8 both materials are reformed together, and driven by the second partial conductor EGR 13 via the EGR valve 1 b, and finally conducted by the EGR chiller 1 a as reformed gas G.
  • Reformed gas G supplies heat Q2 in the EGR chiller 1 1 a to evaporator 7.
  • evaporator 7 provides, through heat exchange equipment 4c in the exhaust gas range 4 the heat Q2. This provides also heat Q1 to catalytic reformer 8.
  • the EGR 1 1 b valve and the EGR 1 1 chiller exchange heat with the EGR 1 1 conductor.
  • the catalytic reformer 8 is additionally presented as a heat exchanger.
  • Fig. 5 is shown the catalytic reformer 6 of the first, second, third and fourth configuration.
  • Catalytic reformer 6 identifies catalyst 8 and evaporator 7.
  • Catalyst 8 is presented as a catalytic coated heat exchanger.
  • the exhaust line 4 passes through the catalytic reformer 6, without direct contact with the means, to reach the reformer. Therefore, at least one partition wall is provided between the exhaust gas A in the exhaust gas range 4 and the remodeling means (the fuel parcel AK, the exhaust gas A in the EGR conductor and the repaired G gas).
  • Exhaust gases A from exhaust gas range 4 forms the "hot side" of the heat exchanger with the catalytic coating, the catalytic reformer 8, and therefore heats the catalytic reformer 8.
  • the exhaust gas A The exhaust gas range 4 flows through the catalytic reformer 8, in addition to the evaporator 7 and the heating of the exhaust gas 4, which serves to vaporize the AK portion of the fuel.
  • the AK portion of the fuel will be driven by a fuel source shown to reformer 6, and vaporized there with evaporator 7. After evaporator 7, vaporized VK fuel will flow into conductor EGR 1 1 within reformer 6.
  • the EGR 1 1 conductor will lead to the reformer 6.
  • the vaporized VK fuel will be mixed with the EGR 1 1 exhaust gases A of mixing M.
  • VK V-A vaporized fuel flows through the catalytic reformer 8 mounted with the heat exchanger, and will create the “cold side” of the heat exchanger and heat the exhaust gas A in the range. exhaust gas 4.
  • Reformed gas G flows through catalytic reformer 8 from reformer 6, and will have a better caloric value, and a larger portion of hydrogen, as well as altered concentrations of the components compared to the composition before the current flows through the reformer 6.
  • a reformer 6 of the first configuration may be assembled in a completely similar manner.
  • the EGR conductor 11 and mixing path M are missing, the fuel is conducted along with water from evaporator 7 to condenser 8, without pre-mixing with exhaust gas A.
  • a High Tumble and a plasma ignition system can also be assisted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne une configuration de moteur et un procédé associé à un moteur à combustion interne (1), lequel est raccordé au conduit d'admission (3) et au conduit des gaz d'échappement (4), présentant un conduit de RGE (11) destiné au recyclage des gaz d'échappement (A) pour l'admission (3), la configuration du moteur possédant un reformeur catalytique (8) monté dans la ligne de RGE (11), de sorte que le carburant reformé soit conduit conjointement avec les gaz d'échappement recyclés pour l'admission du moteur à combustion interne (1). L'invention a pour fonction d'améliorer le processus dans le reformeur (6) et, par conséquent, d'augmenter le rendement du moteur. À cet effet, l'invention fait intervenir un échangeur de chaleur (4) et un reformeur catalytique (8) du reformeur (6), chauffé par l'intermédiaire d'un échangeur de chaleur (4) au moyen des gaz d'échappement (A) du moteur à combustion interne (1).
PCT/BR2019/050044 2018-02-15 2019-02-13 Configuration de moteur et procédé de fonctionnement WO2019157581A1 (fr)

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AT501452018A AT521165B1 (de) 2018-02-15 2018-02-15 Motoranordnung und verfahren zum betreiben
ATA50145/2018 2018-02-15

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WO2021148995A1 (fr) 2020-01-22 2021-07-29 Stc (Developments) Limited Système et procédé de traitement de carburant
CN115405445A (zh) * 2022-08-30 2022-11-29 河南工程学院 一种废气再循环系统前端智能净化装置
US20230010136A1 (en) * 2021-07-06 2023-01-12 Volvo Truck Corporation System for controlling hydrogen combustion in a hydrogen internal combustion engine
US20230074674A1 (en) * 2021-08-31 2023-03-09 Aramco Services Company Process for improving engine efficiency using a fuel reforming system
EP4187077A1 (fr) * 2021-11-30 2023-05-31 Volvo Car Corporation Ensemble moteur à combustion doté d'une unité de reformage d'éthanol

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AT522812B1 (de) * 2019-08-02 2021-04-15 Avl List Gmbh AGR-Anordnung, Brennkraftsystem und Kraftfahrzeug
DE102020106544A1 (de) 2020-03-11 2021-09-16 Bayerische Motoren Werke Aktiengesellschaft Abgasrückführungsvorrichtung für eine Verbrennungskraftmaschine, Verbrennungskraftmaschine mit einer Abgasrückführungsvorrichtung, Kraftfahrzeug mit eine Verbrennungskraftmaschine und Verfahren zum Betreiben einer Verbrennungskraftmaschine
AT524859B1 (de) * 2021-06-11 2022-10-15 Avl List Gmbh Brennkraftsystem mit einem Verbrennungsmotor
EP4257820A1 (fr) * 2022-04-04 2023-10-11 Volvo Car Corporation Moteur à combustion interne avec reformeur de carburant et recirculation des gaz d'échappement

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WO2021148995A1 (fr) 2020-01-22 2021-07-29 Stc (Developments) Limited Système et procédé de traitement de carburant
NL2024727B1 (en) * 2020-01-22 2021-09-09 Stc Developments Ltd Fuel treatment system and process
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EP4187077A1 (fr) * 2021-11-30 2023-05-31 Volvo Car Corporation Ensemble moteur à combustion doté d'une unité de reformage d'éthanol
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CN115405445A (zh) * 2022-08-30 2022-11-29 河南工程学院 一种废气再循环系统前端智能净化装置
CN115405445B (zh) * 2022-08-30 2023-06-23 河南工程学院 一种废气再循环系统前端智能净化装置

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AT521165A4 (de) 2019-11-15
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BR112020016718A2 (pt) 2020-12-15

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