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WO2010020265A1 - Utilisation flexible de l'énergie des gaz d'échappement pour le fonctionnement d'un moteur à combustion interne - Google Patents

Utilisation flexible de l'énergie des gaz d'échappement pour le fonctionnement d'un moteur à combustion interne Download PDF

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Publication number
WO2010020265A1
WO2010020265A1 PCT/EP2008/006846 EP2008006846W WO2010020265A1 WO 2010020265 A1 WO2010020265 A1 WO 2010020265A1 EP 2008006846 W EP2008006846 W EP 2008006846W WO 2010020265 A1 WO2010020265 A1 WO 2010020265A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
line
exhaust
internal combustion
combustion engine
Prior art date
Application number
PCT/EP2008/006846
Other languages
German (de)
English (en)
Inventor
Karl Krebber-Hortmann
Enno Lohse
Original Assignee
Fev Motorentechnik 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 Fev Motorentechnik Gmbh filed Critical Fev Motorentechnik Gmbh
Priority to PCT/EP2008/006846 priority Critical patent/WO2010020265A1/fr
Publication of WO2010020265A1 publication Critical patent/WO2010020265A1/fr

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Classifications

    • 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
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
    • F01N3/046—Exhaust manifolds with cooling jacket
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • 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
    • F01N3/101—Three-way catalysts
    • 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
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/36—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an exhaust flap
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/18—Heater
    • 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
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • 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
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/07—Mixed pressure loops, i.e. wherein recirculated exhaust gas is either taken out upstream of the turbine and reintroduced upstream of the compressor, or is taken out downstream of the turbine and reintroduced downstream of the compressor
    • 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 a method for operating an internal combustion engine having a liquid cooling system, which has an air intake line, an exhaust line in which exhaust aftertreatment means are arranged, and a controllable exhaust gas recirculation line from the exhaust line to the air intake line, in which an exhaust gas heat exchanger included in the liquid cooling system is arranged.
  • the invention relates to an internal combustion engine with a liquid cooling system having an air intake line, an exhaust line and an exhaust gas recirculation line from the exhaust gas line to the air intake line, in which an exhaust gas heat exchanger included in the liquid cooling system is arranged.
  • An exhaust gas recirculation device for an internal combustion engine of a motor vehicle is known from DE 297 22 813 U1, with an exhaust gas recirculation line leading away from an exhaust line and leading to the air supply of the internal combustion engine, in which an exhaust gas recirculation valve and an exhaust gas cooler are arranged, which are connected to a circuit for the engine coolant connected.
  • a thermostatic valve is arranged between the exhaust gas cooler and the circuit of the engine coolant, which blocks a flow of the exhaust gas cooler up to a predetermined above the ambient temperature lying minimum temperature of the coolant.
  • an internal combustion engine in which an exhaust gas heat exchanger is arranged in the exhaust gas strut, which is located in the cooling circuit of the internal combustion engine.
  • This can be a heat recovery from the exhaust gas into the coolant.
  • the exhaust gas temperature should be kept in a temperature window for optimum exhaust aftertreatment and at the same time the internal combustion engine to be heated quickly to achieve a friction reduction with a faster heating of the coolant and thus the engine after the cold start.
  • DeNOx catalyst NOx storage catalysts
  • SCR catalyst selective catalytic regeneration catalysts
  • the positioning of DeNOx or SCR catalytic converter in the exhaust system must be based on the maximum temperatures occurring at nominal power. In the lean-tuned partial load range, this leads to a non-optimal temperature operating range of the DeNOx catalyst or of the SCR catalyst. In the lower load range must be throttled accordingly to maintain the temperature, or the fuel-air mixture can not be tuned lean in idle and thus not be low fuel consumption.
  • the fuel-air mixture is sometimes significantly enriched ( ⁇ ⁇ 1) with corresponding additional consumption. This leads in particular to high CO and HC emissions after the three-way catalyst in the substoichiometric operating range.
  • the present invention seeks to propose a method for the flexible use of the exhaust energy and an internal combustion engine with suitable means for both the operating temperature of the engine influenced in a favorable manner and the raw emission of the engine lowered and the exhaust aftertreatment can be optimized ,
  • the solution to this consists in a method for operating an internal combustion engine having a liquid cooling system, which has an air intake line, an exhaust line, are disposed in the means for exhaust aftertreatment, and a controllable exhaust gas recirculation line from the exhaust line to the air intake in which a included in the liquid cooling system exhaust gas heat exchanger is arranged, in which after the cold start of the internal combustion engine, the exhaust gas line is throttled or locked at one point and the exhaust gas flow from the exhaust line through the exhaust gas heat exchanger and back into the exhaust line is performed and the exhaust gas recirculation line is blocked before entering the Luftansaugstrang.
  • the inventive method thus opens up the possibility, in an internal combustion engine having the means for cooled exhaust gas recirculation, according to the invention control the exhaust gas so that an accelerated heating of the cooling water circuit in the internal combustion engine and thus the internal combustion engine altogether after the cold start possible becomes.
  • the internal friction of the internal combustion engine is thereby accelerated reduced, so that the disadvantages that arise in modern internal combustion engines as a result of process efficiency increase in the warm-up behavior, can be limited or canceled.
  • the method according to the invention and the internal combustion engine according to the invention with the abovementioned means are applicable to free-suction gasoline engines as well as to supercharged gasoline engines and supercharged diesel engines, with mixed-gasoline gasoline engines and direct-injection gasoline engines being included.
  • a variably controllable partial flow of the exhaust gas is conducted from the exhaust gas system via the exhaust gas heat exchanger into the air intake line. (Mode 2).
  • An operation of an internal combustion engine with an exhaust gas turbocharger is in particular provided that in the partial load operation of the internal combustion engine, the partial flow is removed from the exhaust gas line in front of the exhaust gas turbocharger and passed through the exhaust gas heat exchanger in the air intake line. (Mode 2)
  • the exhaust system is throttled throttled at a point and the exhaust gas temperature is kept limited to the means for exhaust aftertreatment to a maximum value by a partial flow of the exhaust gas from the exhaust system is passed through the exhaust gas heat exchanger and passed a first variably controllable lower part of the stream into the air intake line and a second variably controllable sub-stream is fed back into the exhaust line.
  • Mode 3 the exhaust system is throttled throttled at a point and the exhaust gas temperature is kept limited to the means for exhaust aftertreatment to a maximum value by a partial flow of the exhaust gas from the exhaust system is passed through the exhaust gas heat exchanger and passed a first variably controllable lower part of the stream into the air intake line and a second variably controllable sub-stream is fed back into the exhaust line.
  • the adjusting temperature of the exhaust gas can be limited and reduced by cooling a partial flow of the exhaust gas, if otherwise exhaust gas temperatures would be reached, which would lead to damage to the components for exhaust aftertreatment ,
  • the product according to the invention is in an internal combustion engine having a liquid cooling system, which has an air intake line, an exhaust line and an exhaust gas recirculation line from the exhaust line to the air intake in which an integrated in the liquid cooling system exhaust heat exchanger is arranged, which is characterized in that in the exhaust gas recirculation line behind the Exhaust gas heat exchanger, a first shut-off and control valve is arranged and that branches off from the exhaust gas recirculation line between the exhaust gas heat exchanger and shut-off Abgasbypass- a line which opens into the exhaust line behind the branch point of the exhaust gas recirculation line and in which a second shut-off and control valve is arranged and that between the branch point the exhaust gas recirculation line and the junction of the exhaust gas bypass line in the exhaust line a throttle and check valve is arranged. It can be provided that the first shut-off valve and the second shut-off valve are combined to form a three-way valve at the point of branching.
  • the internal combustion engine is a free-breathing gasoline engine
  • a three-way catalytic converter before the branch point of Abgasschreib- guide line and a DeNOx and / or SCR catalyst behind the junction of the exhaust gas bypass line is located in the exhaust system.
  • a high-pressure branch of the exhaust gas recirculation line connects the exhaust line in front of the turbine with the inlet to the exhaust gas heat exchanger and a low-pressure branch of the exhaust gas recirculation line the exhaust line behind the turbine with the inlet to the exhaust gas heat exchanger, in the high-pressure branch, a third shut-off and Control valve and the low-pressure branch a fourth shut-off and control valve is arranged. It can be provided that the third shut-off valve and the fourth shut-off valve are combined to form a three-way valve at the point of line merger.
  • a three-way catalytic converter is provided in front of the Ab branch of the exhaust gas recirculation line and a DeNOx and / or SCR catalyst behind the junction of the exhaust gas bypass line in the exhaust line.
  • a diesel oxidation catalyst and / or a diesel particulate filter is to be provided in front of the branch point of the exhaust gas recirculation line and a DeNOx and / or SCR catalyst behind the junction of the exhaust gas bypass line in the exhaust line.
  • a charge air cooler is to be used in the intake manifold.
  • the maximum temperature before a NOx storage catalyst can be maintained even at full load, without enrichment of the fuel-air mixture is required for supercharged gasoline engines.
  • a single integrated line system with control elements in a compact simple and clear design is used.
  • Figure 1 shows an internal combustion engine according to the invention in the form of a macschaugender gasoline engine in a schematic arrangement including the air intake and the exhaust ducts;
  • FIG. 2 shows the internal combustion engine according to FIG. 1 in the cold start mode (mode
  • FIG. 3 shows the internal combustion engine according to FIG. 1 in part-load mode (mode 2);
  • FIG. 4 shows the internal combustion engine according to FIG. 1 in full load mode (mode
  • Figure 5 shows an internal combustion engine according to the invention in the form of a supercharged gasoline engine or as a supercharged diesel engine in a schematic arrangement including the air intake and the exhaust ducts.
  • FIG. 6 shows the internal combustion engine according to FIG. 5 in cold start mode (mode
  • FIG. 7 shows the internal combustion engine according to FIG. 5 in part-load mode (mode 2);
  • FIG. 8 shows the internal combustion engine according to FIG. 5 in full load mode (mode
  • FIG. 9 shows an internal combustion engine according to FIG. 5 in a first modified embodiment with a cooled exhaust manifold
  • FIG. 10 shows an internal combustion engine according to FIG. 5 in a second modified embodiment with cooled exhaust manifold.
  • FIG. 1 shows an internal combustion engine 11 according to the invention in the form of a free-suction four-cylinder engine, which can be understood as a mixture-sucking or direct-injection gasoline engine, with four cylinders being symbolized by circles in plan view.
  • an intake manifold 12 with a throttle valve 13 can be seen, which opens into an intake air collector 14.
  • four intake manifolds 15 lead to the air intake side of the engine.
  • the Lucasansaugstrang total of the aforementioned parts is designated by the reference numeral 16.
  • an exhaust pipe 20 From the exhaust manifold 18, an exhaust pipe 20 first leads into a three-way catalyst 19 and from there via a further section of the exhaust pipe 20 to a catalyst 21 in the form of a DeNOx catalyst or in the form of an SCR catalyst.
  • the exhaust line in total from the aforementioned parts is designated by the reference numeral 23.
  • a controllable throttle and shut-off valve 22 is provided between the catalytic converters 19, 21.
  • an exhaust branch line 24 departs in front of the throttle flap 22, which is branched at a branch point 29 into an exhaust gas recirculation line 25 and into an exhaust gas bypass line 26.
  • an exhaust gas heat exchanger 27th used, on the one hand can be traversed by branched off exhaust gas, on the other hand in an outer cooling water pipe 28 of the engine 11 and is constantly flowed through by the cooling water.
  • exhaust gas recirculation line 25 behind the branch point 29 is an exhaust gas control valve 30.
  • exhaust gas bypass 26 behind the branch 29 is another exhaust control valve 31.
  • the exhaust gas recirculation line 25 is connected via a branching system 32 with the individual air intake 15.
  • a temperature measuring device 33 for the catalyst temperature T4 is indicated.
  • the aforementioned parts in total are referred to as exhaust gas recirculation system 34.
  • FIG. 2 shows the cold start mode of the internal combustion engine, wherein the line sections of the lines 24, 25, 26 through which exhaust gas flows are characterized by thin lines extending parallel to the line branches. The same details are assigned the same numbers as in FIG. 1.
  • FIG. 3 shows the partial load mode of the internal combustion engine according to FIG. The same details are given the same reference numerals as in FIG.
  • the exhaust gas flow through portions of the lines 24, 25, 26 are marked with parallel to the lines running thin lines.
  • the operating mode at low partial load which is driven in particular with an air ratio ⁇ > 1 and thus requires the production of the ignitability, a stratification of the fuel-air mixture in order to ensure the spark plug, an air ratio within the ignition limits.
  • the exhaust control valve 31 is kept closed and the exhaust control valve 30 is opened, so that a return of exhaust gas in the air intake line 16 can take place.
  • the exhaust gas forcibly flows via the exhaust gas heat exchanger 27, so that the cooling water is further heated and cooled exhaust gas is conducted into the intake line 16 to improve the efficiency.
  • no cooled exhaust gas is returned to the exhaust line 23.
  • the blocking flap 22 is partially closed and the part of the exhaust gas stream which is diverted via the exhaust branch line 24 is branched by opening the exhaust gas regulating valve 30 and regulating the exhaust gas regulating valve 31 variably to the line branches 25, 26.
  • the exhaust gas is as previously described returned to the cooling system in the heat exchanger 27 in the intake air system, while for controlling and optimizing the exhaust gas temperature T4 in the catalyst 21, a variable large partial flow of the cooled exhaust gas before the catalyst 21 is returned to the exhaust pipe 20.
  • FIG. 5 shows an internal combustion engine 11 according to the invention in the form of a turbocharged four-cylinder engine, which can be understood as a mixed-intake or direct-injection gasoline engine or as a diesel engine, four cylinders being symbolized by circles in plan view.
  • a Ansaugstut- zen 12 is shown, which is connected via the compressor 42 of an exhaust gas turbocharger 41 with a charge air pipe 45.
  • a charge air cooler 44 which can use ambient air or cooling water of the internal combustion engine as a coolant.
  • a throttle valve 13 can be seen. From the intake air collector 14, four intake manifolds 15 lead to the air intake side of the engine.
  • the charge air line as a whole is designated by the reference numeral 16.
  • an exhaust gas line 20 leads from the exhaust gas collector 18 initially into a three-way catalytic converter 19 (TWC) and from there via a further section of the exhaust gas line 20 to a catalytic converter 21 in the form of a DeNOx - or an SCR catalyst.
  • a diesel oxidation catalyst (DOC) and / or a diesel particulate filter (DPF) replace the three-way catalytic converter 19.
  • the exhaust line in total from the aforementioned parts is designated by the reference numeral 23.
  • a controllable throttle and shut-off valve 22 is provided between the two catalysts.
  • an exhaust branch line 24 branches off in front of the throttle valve 22, which branches off at a branch point 29 into an exhaust gas recirculation line 25 and into an exhaust gas bypass line 26.
  • an exhaust gas heat exchanger 27 is used, which can be traversed on the one hand by diverted exhaust gas, on the other hand in an outer cooling water line 28 of the internal combustion engine 11 is constantly flowed through by the cooling water.
  • a cooling water-air heat exchanger as the main heat exchanger, on which the internal combustion engine 11 also has, is not shown.
  • an exhaust gas control valve 30 In the exhaust gas recirculation line 25 behind the branch point 29 is an exhaust gas control valve 30.
  • exhaust control valve 31 In the exhaust gas bypass 26 behind the branch 29 is another exhaust control valve 31.
  • the exhaust gas recirculation line 25 is connected via a branching system 32 with the individual air intake 15.
  • a low-pressure branch 36 goes behind the turbine, ie with low pressure level of the exhaust pipe 20 to the exhaust branch line 24 from.
  • the high-pressure branch line 35 opens into the low-pressure branch line 36.
  • exhaust control valves 37 and 38 are used in the lines, indicated.
  • FIG. 6 shows the cold start mode of the internal combustion engine, wherein the line sections of the lines 24, 25, 26, 35, 36 through which exhaust gas flows are characterized by thin lines running parallel to the line sections. The same details are given the same numbers as in FIG. 5.
  • the cold start mode no exhaust gas recirculation takes place in the air intake line, which is caused by the exhaust control valve 30 is fully closed.
  • the entire exhaust stream or a partial stream is guided by closing the throttle valve 22 and by opening the exhaust control valves 36 and 31 via the exhaust heat exchanger 27 and immediately back into the exhaust pipe 20 behind the throttle valve 22.
  • the exhaust control valve 37 is closed in this case, so that the exhaust branch line 24 is fed exclusively via the low-pressure branch 36.
  • the cooling water of the internal combustion engine is maximally and as quickly as possible brought to a desired elevated temperature, wherein the exhaust gas is cooled in a permissible manner.
  • the catalyst 21 remains effective
  • FIG. 7 shows the partial load mode of the internal combustion engine according to FIG. 5. The same details are given the same reference numerals as in FIG. The exhaust gas flow through portions of the lines 24, 25, 26, 35, 36 are marked with parallel to the lines extending thin lines.
  • the exhaust control valve 31 is kept closed and the exhaust gas control valve 30 is opened, so that a return of exhaust gas in the air intake line 16 can take place.
  • the exhaust control valve 37 is opened and the exhaust control valve 38 is closed, so that the exhaust branch line 24 is fed exclusively via the high-pressure branch 35.
  • the exhaust gas forcibly flows via the exhaust gas heat exchanger 27, so that the cooling water is further heated up and cooled exhaust gas is led into the intake line 16 in order to improve the efficiency and to reduce the raw emissions.
  • no cooled exhaust gas is returned to the exhaust line 23.
  • FIG. 8 shows the operating mode at high partial load and the operating mode at full load.
  • the same details are given the same reference numbers as in FIG. 5.
  • the sections of the lines 24, 25, 26, 35, 36 through which exhaust gas flows are marked by thin lines running parallel to the lines.
  • the blocking flap 22 is partially closed and the part of the exhaust gas stream which is diverted via the exhaust branch line 24 is branched by opening the exhaust gas regulating valve 30 and regulating the exhaust gas regulating valve 31 variably to the line branches 25, 26.
  • the exhaust gas is fed from the high-pressure branch 35 into the exhaust branch line as described above and after cooling in the heat exchanger 27 in a partial flow in the intake air system, while limiting the exhaust gas temperature T4 a variable large part flow of the cooled exhaust gas cooled in front of the catalyst 21 is returned to the exhaust pipe 20.
  • FIGS. 9 and 10 each show an internal combustion engine 11 according to the invention in the form of a turbocharged four-cylinder engine, which can be understood as a gasoline engine or as a diesel engine, wherein four cylinders are symbolized by circles in plan view.
  • an intake 12 is shown, which is connected via the compressor 42 of an exhaust gas turbocharger 41 with a charge air pipe 45.
  • a charge air cooler 44 which can use ambient air or cooling water of the internal combustion engine as a coolant.
  • a throttle valve 13 can be seen.
  • four intake manifolds 15 lead to the air intake side of the engine.
  • the charge air line as a whole is designated by the reference numeral 16.
  • the exhaust nozzles 17 ' and the exhaust collector 18 ' are enclosed by a cooling water jacket 46, which is exclusively part of an outer coolant circuit 47, which is not connected to the coolant circuit of the internal combustion engine.
  • this outer coolant circuit is a recooler or energy converter 48, with the transferred by the coolant exhaust heat transferred to other media or can be converted directly into electrical or mechanical energy.
  • the exhaust gas collector 18 ' acts on the turbine 43 of the exhaust gas turbocharger 41.
  • an exhaust gas line 20 leads from the exhaust gas collector 18 initially into a three-way catalytic converter 19 (TWC) and from there via a further section of the exhaust gas line 20 to a catalyst 21 in the form a DeNOx or an SCR catalyst.
  • a diesel oxidation catalyst (DOC) and / or a diesel particulate filter (DPF) replace the three-way catalyst 19.
  • the exhaust line in total from the aforementioned parts is designated by the reference numeral 23.
  • a controllable throttle and shut-off valve 22 is provided between the two catalysts.
  • an exhaust branch line 24 branches off in front of the throttle valve 22, which branches off at a branch point 29 into an exhaust gas recirculation line 25 and into an exhaust gas bypass line 26.
  • an exhaust gas heat exchanger 27 is used, which can be traversed by branched off exhaust gas, on the other hand in an outer cooling water line 28 of the internal combustion engine 11 and is constantly flowed through by the cooling water.
  • a cooling water-air heat exchanger as the main heat exchanger, on which the internal combustion engine 11 also has, is not shown.
  • an exhaust gas control valve 30 In the exhaust gas recirculation line 25 behind the branch point 29 is an exhaust gas control valve 30.
  • exhaust control valve 31 In the exhaust gas bypass 26 behind the branch 29 is another exhaust control valve 31.
  • the exhaust gas recirculation line 25 is connected via a branching system 32 with the individual air intake 15.
  • From the exhaust manifold 18 'in front of the turbine 43 leads a high-pressure branch line 35 at high pressure level in the exhaust branch line 24.
  • a low-pressure branch 36 goes behind the turbine, ie with low pressure level of the exhaust pipe 20 to the exhaust branch line 24 off.
  • the high-pressure branch line 35 opens into the low-pressure branch line 36.
  • exhaust control valves 37 and 38 are used in the lines, indicated.

Landscapes

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

Abstract

L'invention concerne un procédé pour le fonctionnement d'un moteur à combustion interne (11) avec un système de refroidissement par liquide, lequel moteur présente un conduit d'aspiration d'air (16), un conduit de gaz d'échappement (23) dans lequel sont disposés des moyens de post-traitement des gaz d'échappement, et une conduite de recyclage des gaz d'échappement contrôlable (24, 25) allant du conduit de gaz d'échappement (23) au conduit d'aspiration d'air (16) dans laquelle est disposé un échangeur de chaleur de gaz d'échappement (27) intégré dans le système de refroidissement par liquide. Selon ce procédé, après le démarrage à froid du moteur à combustion interne, le conduit de gaz d'échappement (23) est obturé ou bloqué à un endroit et le flux de gaz d'échappement est guidé du conduit de gaz d'échappement (23) en passant par l'échangeur de chaleur de gaz d'échappement (27) et ramené dans le conduit de gaz d'échappement (23) et la conduite de recyclage de gaz d'échappement (25) est bloquée avant l'entrée dans le conduit d'aspiration d'air (16).
PCT/EP2008/006846 2008-08-20 2008-08-20 Utilisation flexible de l'énergie des gaz d'échappement pour le fonctionnement d'un moteur à combustion interne WO2010020265A1 (fr)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2211048A1 (fr) * 2009-01-23 2010-07-28 Pierburg GmbH Dispositif de clapets de gaz d'échappement et système de récupération thermique à l'échappement d'un moteur à combustion interne
DE102010050413A1 (de) * 2010-11-04 2012-05-10 Daimler Ag Kraftfahrzeug-Brennkraftmaschine mit Abgasrückführung
CN102953790A (zh) * 2011-08-23 2013-03-06 通用汽车环球科技运作有限责任公司 有热量回收装置的内燃机排气装置及其工作方法
WO2013167823A1 (fr) * 2012-05-09 2013-11-14 Valeo Systemes De Controle Moteur Système de récupération d'énergie dans un circuit de gaz d'échappement
WO2013171393A1 (fr) * 2012-05-15 2013-11-21 Valeo Systemes De Controle Moteur Systeme de recuperation d'energie dans un circuit de gaz d'echappement
CN104234875A (zh) * 2013-06-13 2014-12-24 常州市利众环保科技有限公司 燃油燃气发动机循环燃烧绿色排放
DE102014205196A1 (de) * 2014-03-20 2015-09-24 Bayerische Motoren Werke Aktiengesellschaft Niederdruck-Abgasrückführung für eine Brennkraftmaschine
DE102015223495A1 (de) 2015-11-26 2017-06-01 Volkswagen Aktiengesellschaft Aufladbare Brennkraftmaschine und Verfahren zum Betreiben einer aufladbaren Brennkraftmaschine
EP3081778A4 (fr) * 2013-12-10 2017-06-21 Hanon Systems Dispositif d'échange de chaleur fonctionnel et intégré pour automobile
DE102017218953A1 (de) * 2017-10-24 2019-04-25 Volkswagen Aktiengesellschaft Verbrennungsmotor und Verfahren zur Restwärmenutzung des Abgases eines Verbrennungsmotors
DE102019123453A1 (de) * 2019-09-02 2021-03-04 Volkswagen Ag Abgasnachbehandlungssystem und Verfahren zum Temperaturmanagement eines SCR-Katalysators in der Abgasanlage eines Verbrennungsmotors
CN112963271A (zh) * 2021-03-19 2021-06-15 广西玉柴机器股份有限公司 具有智能热管理的egr系统
CN115387885A (zh) * 2021-05-24 2022-11-25 上海汽车集团股份有限公司 内燃机余热回收装置及其控制方法

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EP0913561A2 (fr) * 1997-10-31 1999-05-06 Valeo Thermique Moteur S.A. Ligne d'échappement et de recirculation des gaz pour moteur de véhicule automobile
EP1498587A1 (fr) * 2003-06-19 2005-01-19 Ab Volvo Penta Tubulures d'échappement et moteur à combustion interne avec tubulures d'échappement
FR2885178A1 (fr) * 2005-04-27 2006-11-03 Renault Sas Groupe motopropulseur comportant un circuit de nettoyage d'un circuit de recirculation des gaz d'echappement
DE102006010095A1 (de) * 2006-03-06 2007-09-13 Robert Bosch Gmbh Verfahren und Vorrichtung zur Regeneration einer Abgasreinigungsanlage
WO2008038083A2 (fr) * 2006-09-29 2008-04-03 Toyota Jidosha Kabusiki Kaisha Système de recirculation des gaz d'échappement pour un moteur à combustion interne, et son procédé de contrôle

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Publication number Priority date Publication date Assignee Title
EP0913561A2 (fr) * 1997-10-31 1999-05-06 Valeo Thermique Moteur S.A. Ligne d'échappement et de recirculation des gaz pour moteur de véhicule automobile
EP1498587A1 (fr) * 2003-06-19 2005-01-19 Ab Volvo Penta Tubulures d'échappement et moteur à combustion interne avec tubulures d'échappement
FR2885178A1 (fr) * 2005-04-27 2006-11-03 Renault Sas Groupe motopropulseur comportant un circuit de nettoyage d'un circuit de recirculation des gaz d'echappement
DE102006010095A1 (de) * 2006-03-06 2007-09-13 Robert Bosch Gmbh Verfahren und Vorrichtung zur Regeneration einer Abgasreinigungsanlage
WO2008038083A2 (fr) * 2006-09-29 2008-04-03 Toyota Jidosha Kabusiki Kaisha Système de recirculation des gaz d'échappement pour un moteur à combustion interne, et son procédé de contrôle

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2211048A1 (fr) * 2009-01-23 2010-07-28 Pierburg GmbH Dispositif de clapets de gaz d'échappement et système de récupération thermique à l'échappement d'un moteur à combustion interne
DE102010050413A1 (de) * 2010-11-04 2012-05-10 Daimler Ag Kraftfahrzeug-Brennkraftmaschine mit Abgasrückführung
US8833059B2 (en) 2010-11-04 2014-09-16 Daimler Ag Motor-vehicle internal combustion engine with exhaust-gas recirculation
CN102953790A (zh) * 2011-08-23 2013-03-06 通用汽车环球科技运作有限责任公司 有热量回收装置的内燃机排气装置及其工作方法
WO2013167823A1 (fr) * 2012-05-09 2013-11-14 Valeo Systemes De Controle Moteur Système de récupération d'énergie dans un circuit de gaz d'échappement
WO2013171393A1 (fr) * 2012-05-15 2013-11-21 Valeo Systemes De Controle Moteur Systeme de recuperation d'energie dans un circuit de gaz d'echappement
FR2990728A1 (fr) * 2012-05-15 2013-11-22 Valeo Sys Controle Moteur Sas Systeme de recuperation d'energie dans un circuit de gaz d'echappement.
CN104234875A (zh) * 2013-06-13 2014-12-24 常州市利众环保科技有限公司 燃油燃气发动机循环燃烧绿色排放
EP3081778A4 (fr) * 2013-12-10 2017-06-21 Hanon Systems Dispositif d'échange de chaleur fonctionnel et intégré pour automobile
DE102014205196A1 (de) * 2014-03-20 2015-09-24 Bayerische Motoren Werke Aktiengesellschaft Niederdruck-Abgasrückführung für eine Brennkraftmaschine
DE102015223495A1 (de) 2015-11-26 2017-06-01 Volkswagen Aktiengesellschaft Aufladbare Brennkraftmaschine und Verfahren zum Betreiben einer aufladbaren Brennkraftmaschine
DE102017218953A1 (de) * 2017-10-24 2019-04-25 Volkswagen Aktiengesellschaft Verbrennungsmotor und Verfahren zur Restwärmenutzung des Abgases eines Verbrennungsmotors
DE102019123453A1 (de) * 2019-09-02 2021-03-04 Volkswagen Ag Abgasnachbehandlungssystem und Verfahren zum Temperaturmanagement eines SCR-Katalysators in der Abgasanlage eines Verbrennungsmotors
CN112963271A (zh) * 2021-03-19 2021-06-15 广西玉柴机器股份有限公司 具有智能热管理的egr系统
CN112963271B (zh) * 2021-03-19 2024-04-09 广西玉柴机器股份有限公司 具有智能热管理的egr系统
CN115387885A (zh) * 2021-05-24 2022-11-25 上海汽车集团股份有限公司 内燃机余热回收装置及其控制方法
CN115387885B (zh) * 2021-05-24 2024-03-29 上海汽车集团股份有限公司 内燃机余热回收装置及其控制方法

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