WO2014009770A1 - Procédé et appareil d'un moteur à combustion interne pour stocker les gaz d'échappement pendant un freinage de moteur et pour les mettre en recirculation dans la conduite d'admission - Google Patents

Procédé et appareil d'un moteur à combustion interne pour stocker les gaz d'échappement pendant un freinage de moteur et pour les mettre en recirculation dans la conduite d'admission Download PDF

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Publication number
WO2014009770A1
WO2014009770A1 PCT/IB2012/001810 IB2012001810W WO2014009770A1 WO 2014009770 A1 WO2014009770 A1 WO 2014009770A1 IB 2012001810 W IB2012001810 W IB 2012001810W WO 2014009770 A1 WO2014009770 A1 WO 2014009770A1
Authority
WO
WIPO (PCT)
Prior art keywords
gases
internal combustion
combustion engine
exhaust
compressor
Prior art date
Application number
PCT/IB2012/001810
Other languages
English (en)
Inventor
Iyad Balloul
Pierre Emmanuel GRAND
Original Assignee
Renault Trucks
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 Renault Trucks filed Critical Renault Trucks
Priority to PCT/IB2012/001810 priority Critical patent/WO2014009770A1/fr
Publication of WO2014009770A1 publication Critical patent/WO2014009770A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F02D9/06—Exhaust brakes
    • 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
    • F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
    • 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
    • F02B21/00—Engines characterised by air-storage chambers
    • 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
    • F02B37/10—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump at least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an engine-driven pump
    • 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
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • 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
    • F02M26/24—Layout, e.g. schematics with two or more coolers
    • 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
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like 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
    • F02M26/37—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with temporary storage of recirculated exhaust gas
    • 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
    • F02M26/39—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in series
    • 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
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1006—Engine torque losses, e.g. friction or pumping losses or losses caused by external loads of accessories
    • 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
    • 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
    • Y02T10/40—Engine management systems

Definitions

  • the present invention concerns a method for controlling an intake-exhaust gases arrangement in an internal combustion engine system for an automotive vehicle, such as a truck.
  • the invention also concerns an internal combustion engine system for an automotive vehicle adapted to such a method, and an automotive vehicle, such as a truck, comprising such a system.
  • US-B-4 658 781 teaches to, during an engine braking phase, recover from the exhaust line the gases which have been compressed in the cylinders, and which consist mostly of air, to store those gases in a compressed tank and, eventually, to inject those gases in the intake circuit of the internal combustion engine during a subsequent power phase.
  • the recovery of gases recovered during engine braking phase implies the use of specific materials and components, because of the high temperature of the gases which have undergone compression in the cylinders. This induces relatively high costs.
  • the use of the recovered gases is not optimized and the gases injected in the air feed circuit after being stored in the tank may not have a high enough pressure to effectively boost the internal combustion engine.
  • the aim of the invention is to provide a new method for controlling an intake-exhaust gases arrangement for an automotive vehicle, in which the recovered gases management is optimized.
  • the invention concerns a method
  • an intake-exhaust gases arrangement for an automotive vehicle such as a truck (T)
  • an internal combustion engine (2) having an intake line (7) and an exhaust line (8)
  • step d compressing the gases cooled at step d).
  • such a method may incorporate one or several of the following features:
  • step d) may occur after step d);
  • the method may comprise a further step f), consisting in, after step e) and prior to step b), cooling the gases compressed at step e);
  • the method may comprise a further step g) consisting in, prior to step c), expanding the gases to be delivered to the internal combustion engine (2) from the tank (20);
  • the gases may be compressed by a compressor (16) driven by the internal combustion engine (2); and/or - step e) may be performed only after the pressure in the tank (20) reaches a threshold value.
  • the invention also concerns an intake-exhaust gases system for an automotive vehicle, such as a truck, comprising an air inlet port, an exhaust gases outlet port, an internal combustion engine having an intake manifold connected to the air inlet port and an exhaust manifold connected to the exhaust gases outlet port, said system comprising means to direct exhaust gases expelled from the engine towards an exhaust gases tank and means to direct exhaust gases from this tank towards the internal combustion engine.
  • This system is characterized in that it comprises a compressor adapted to compress exhaust gases before they are stored in the tank and means to cool down exhaust gases before they are compressed by the compressor.
  • said system comprises a first flow path for directing gases expelled from the engine towards the storage tank and a second flow path for directing gases from said tank towards the internal combustion engine (2), and the system comprises a compressor in the first flow path adapted to compress gases before they are stored in the storage tank, and a cooler located in the first flow path upstream of the compressor.
  • the invention concerns a system having:
  • said system comprises, in a gas flow line between the exhaust line and the storage tank, a cooler followed by a compressor.
  • the cooler and the compressor respectively cool down and compress the gases taken from the exhaust line and directed to the storage tank.
  • such a system may incorporate one or several of the following features:
  • the cooler may comprise a heat exchanger.
  • the system may comprise means, such as a second cooler, to cool down exhaust gases compressed by the compressor before they are stored in the tank.
  • the second cooler may in such case be located downstream of the compressor in the first flow path.
  • the means to cool down exhaust gases compressed by the compressor may comprise a heat exchanger.
  • the compressor may be driven by the internal combustion engine.
  • the compressor may be reversible and connected so that it can expand compressed gases stored in the tank before these gases are directed to the intake line.
  • the system may comprise means to prevent gases taken from the exhaust manifold from passing in the compressor before being stored in the tank.
  • the system may comprise a bypass line bypassing the compressor.
  • the bypass line may be equipped with a valve adapted to selectively allow or block exhaust gases flow from the exhaust manifold to the tank without going through the compressor.
  • the invention also concerns an automotive vehicle, such as a truck, which comprises an internal combustion engine system as mentioned here-above.
  • FIG. 1 is a schematic view of an air-exhaust gases system according to the invention, in a first configuration
  • FIG. 2 is a view similar to figure 1 of the air-exhaust gases system in a second configuration
  • FIG. 3 is a view similar to figure 2, for a second embodiment of the invention.
  • a vehicle such as truck T schematically represented on the figures, comprises an internal combustion engine system (S) having an internal combustion engine 2 and an intake-exhaust gases arrangement, which includes an intake line feeding engine 2 with intake gases and which includes an exhaust line collecting gases expelled from engine 2.
  • the gases flowing in the exhaust line can include exhaust gases resulting from the combustion process in the engine 2, especially when the system is operated in the power phase, i.e. a phase when engine delivers torque.
  • the gases collected in the exhaust line consist mostly of air.
  • the intake gases may comprise air and/or may comprise gases collected from an exhaust line of the system.
  • System S comprises an air inlet port 4, from which air coming from the outside of truck T can enter in system S to feed internal combustion engine 2.
  • Air entering by air inlet port 4 is fed to internal combustion engine 2 via an intake line 7 which may include, especially if the engine is a multi-cylinder engine, an intake manifold. Air may be mixed to fuel in intake manifold 6 or in the engine itself. Other gases may be mixed with air to be fed to the engine, especially recirculated exhaust gases.
  • the intake line 7 may comprise an intake throttle 6. Items 4 and 6 and line 7, form together an air feed circuit for engine 2.
  • Exhaust gases are expelled from internal combustion engine 2 via an exhaust line 8.
  • the exhaust line 8 ends in an exhaust gases outlet port 10 where gases are released to the atmosphere.
  • the exhaust line may include one or several exhaust gases after- treatment systems (not shown) and/or an exhaust silencing device (not shown), in the shown embodiment, the exhaust line 8 comprises an exhaust throttle 9, which can pertain to an exhaust brake system for blocking or at least partially blocking passage of gases in the exhaust line towards the outlet port 10.
  • the exhaust throttle could also pertain to a variable geometry turbine of a turbocompressor. It could also be a dedicated valve.
  • System S also comprises a recovery circuit C which is connected to the exhaust line 8 for taking at least part of the gases flowing in the exhaust line. Gases entering circuit C pass into a cooler 14, adapted to reduce their temperature.
  • Cooled exhaust gases then pass into a compressor 16, which may be driven by internal combustion engine 2 thanks to a transmission shaft 202.
  • Compressed recovered gases then may pass into an optional second cooler 18 before being stored in a compressed gases storage tank 20.
  • the recovery circuit comprises a main line 15 along which the first cooler 14, the compressor 16, the optional second cooler 18 and the storage tank 20 are arranged in series, in that order.
  • the main line 15 connects the exhaust line 8 to an entry port of the first cooler 14, an exit port of the first cooler 14 to an entry port of the compressor 16, and an exit port of the compressor to the storage tank.
  • this shown embodiment has the particularity that the storage tank 20 has only one port for both entry and exit.
  • the second optional cooler 18 is located on the part of the main line 15 extending between the compressor 16 and the storage tank 20.
  • the compressor 16 is preferably a rotary compressor, for example of the centrifugal type or of the scroll type.
  • the main line 15 defines a first flow path connecting the exhaust line 8 to the storage tank 20.
  • main line 15 of the recovery circuit is connected to the exhaust line 8 upstream of the exhaust throttle 9 when such throttle is provided in the exhaust line.
  • a circuit input control valve 12 is preferably arranged in the main line 15 of the circuit C upstream of the compressor 6 to control the flow of gases flowing from the exhaust line 8 into the recovery circuit C.
  • input control valve 2 can be a three way valve arranged at the junction between the exhaust line 8 and the main line 15. In such a case, input control valve 12 can also play the role of the exhaust throttle, without the need of any further component, as it can block or partially block the flow of gases towards the outlet port 10.
  • the output control valve 12 can be implemented as a two-way valve, preferably a proportional valve, provided in the main line 15 between its junction to the exhaust line 8 and the compressor 16.
  • Cooler 14 and/or optional second cooler 18 may include a heat exchanger.
  • the cooling medium may then be ambient air or an engine fluid such as the coolant fluid for the engine.
  • Recovery circuit C is connected to the air feed circuit by an auxiliary gases feeding line 22 which opens in the intake line 7.
  • the auxiliary feeding line 22 is connected to the intake line 7 downstream of the intake throttle 6.
  • a circuit output valve 13 is provided on the auxiliary feeding line for controlling the flow of gases flowing from the recovery circuit C to the intake line 7.
  • the output control valve can be implemented as a three-way valve 13 provided at the junction point between the auxiliary feeding line 22 and the intake line 7.
  • the output control valve can be implemented as a two-way valve provided on the auxiliary feeding line 22.
  • a check valve could be provided on the auxiliary feeding line 22 for preventing any back flow of gases from the intake line 7 to the recovery circuit C through the auxiliary feeding line 22.
  • the auxiliary feeding line 22 is connected to the main line 15 of the circuit 15 between the compressor 16 and the storage tank 20.
  • the storage tank may have a single entry/exit port and it can be seen as being on a deadend branch of the circuit C.
  • system S may include, as shown on Figures 1 and 2, a switch valve located at the junction between the auxiliary feeding line 22 and the main line 15.
  • the switch valve may be a three-way valve 28.
  • the three-way switch valve may have only two possible configurations, preferably the first and the third configurations described above.
  • the three-way switch valve could be omitted and be replaced by a two-way valve or a check valve installed on the portion of the main line extending between the compressor 16 and the junction with the auxiliary feeding line 22, such as exemplified in Figure 3.
  • any valve can be omitted in the main line downstream of the compressor 16, provided that an input control valve 12 is provide upstream of the compressor 16 to the prevent the gases stored in the tank from being released in an uncontrolled manner into the exhaust line.
  • the recovery circuit defines a second flow path connecting the storage tank to the intake line 7.
  • the second optional cooler is located on the main line 15 between the storage tank 20 and the junction with the auxiliary feeding line 22.
  • the gases go through the second optional cooler both when flowing from the compressor 16 to the storage tank 20, and when flowing from the storage tank to the intake line 7.
  • the second optional cooler 18 could be located on the main line 15 between the compressor 16 and the junction with the auxiliary feeding line 22. With such design, the gases would not go through the second optional cooler when flowing from the storage tank 20 to the intake line 7.
  • the first and the second flow paths have a common portion between the storage tank 20 and the junction between main line 15 and auxiliary feeding line 22.
  • the auxiliary feeding line 22 could be connected to a separate exit port of the storage tank 20, while the main line would be connected to a separate entry port of the storage tank.
  • the auxiliary feeding line could be seen as a continuation of the main line, and the first and second flow paths would be separate.
  • system S comprises a nonrepresented turbocharger adapted to deliver compressed air to internal combustion engine 2 via intake line 7.
  • the turbocharger typically comprises a turbine in the exhaust line 8, which is driven by the flow of exhaust gases and which drive a compressor located in the intake line 7.
  • compressed gases coming from tank 20 are injected into the air feed circuit downstream of compressor of the turbocharger.
  • the turbine of the turbocharger is of the variable geometry type, it should preferably be located downstream of the junction point between the exhaust line 8 and the main line 15 of the recovery circuit. With such arrangement, the turbine can act at least partially as an exhaust throttle to cause a back pressure favorable to the direction of gases towards the recovery circuit.
  • the increased air flow available for the engine can be favorable in terms of fuel consumption.
  • the fact that this increased air flow can be delivered quickly may improve the reactivity of internal combustion engine 2, for example when the driver actuates again the acceleration pedal after an engine braking phase, especially when compared to the known turbo lag of a turbocharger.
  • the throttle 6 can be partially or fully closed during the period when gases are provided from the recovery circuit to the engine, in order to limit or prevent any back flow of gases from the recovery circuit to the air inlet port 4.
  • a second embodiment of the invention is represented on figure 3.
  • the output control valve 13 is a two-way valve located on the auxiliary feeding line 22, and the three-way switch valve is replaced by a check valve 26 installed on the portion of the main line extending between the compressor 16 and the junction with the auxiliary feeding line 22 for blocking the flow of gases from tank 20 through compressor 16.
  • the intake-exhaust gases arrangement comprises a bypass line 24 which bypasses compressor 16 so that gases flowing in recovery circuit C do not systematically go through compressor 16.
  • Bypass line 24 is connected, on the one hand, between compressor 16 and cooler 14 and, on the other hand, between compressor 16 and the second cooler 18.
  • Bypass line 24 comprises a two-way bypass valve 240, adapted to selectively block or allow gases flow from cooler 14 to tank 20 via bypass line 24.
  • This structure avoids operation of compressor 16 when not necessary, especially when the pressure in the storage tank 20 is lower than the pressure in the exhaust line 8.
  • exhaust gases coming from exhaust manifold 8 follow bypass line 24 until the exhaust gases pressure in tank 20 reaches a threshold value near the pressure in the exhaust line.
  • two-way valve 240 is controlled so as to open bypass line 24 as long as pressure within tank 20 does not reach such a threshold value. The bypass is then closed so that the compressor can increase the pressure of gases delivered to the storage tank above the pressure in the exhaust line.
  • compressor 16 may be reversible and connected so that it can be used to expand gases coming from tank 20 before they are fed to the air feed circuit or into intake line 7. This permits to create additional mechanical torque in the reversed compressor which can be used to provide power from the reversed compressor 16 to internal combustion engine 2 in power mode through their mechanical connection, in order to further reduce the response time of acceleration.
  • An advantage of intake-exhaust gases system S is that, irrespective of the embodiment considered, it does not involve heavy modifications of internal combustion engine 2, but only needs additional pipe connections on engine air feed circuit and exhaust circuit.
  • part of the recovery circuit excluding the branch having the storage tank, can be used during the power mode as an exhaust gases recirculation circuit.
  • the exhaust gases can be compressed by the compressor.
  • exhaust gases can be attracted by a suction effect which may occur at the junction between the main line 15 and the auxiliary feed line 22 when gases are delivered from the storage tank 20 to the engine 2.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

L'invention porte sur un procédé pour commander un ensemble admission-gaz d'échappement pour un véhicule automobile, comprenant un moteur à combustion interne (2) ayant une conduite d'admission (7) et une conduite d'échappement (8), • le procédé comprenant les étapes suivantes : • a) pendant une phase de freinage du moteur à combustion interne (2), prélever les gaz de la conduite d'échappement (8), • b) stocker les gaz prélevés à l'étape a) dans un réservoir (20) de l'ensemble admission-gaz d'échappement, • c) pendant une phase de puissance du moteur à combustion interne (2), distribuer les gaz stockés dans le réservoir (20) au moteur à combustion interne (2), ledit procédé comprenant en outre les étapes suivantes : • d) avant l'étape b), refroidir les gaz prélevés à l'étape a), • e) avant l'étape b), comprimer les gaz refroidis à l'étape d).
PCT/IB2012/001810 2012-07-13 2012-07-13 Procédé et appareil d'un moteur à combustion interne pour stocker les gaz d'échappement pendant un freinage de moteur et pour les mettre en recirculation dans la conduite d'admission WO2014009770A1 (fr)

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PCT/IB2012/001810 WO2014009770A1 (fr) 2012-07-13 2012-07-13 Procédé et appareil d'un moteur à combustion interne pour stocker les gaz d'échappement pendant un freinage de moteur et pour les mettre en recirculation dans la conduite d'admission

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PCT/IB2012/001810 WO2014009770A1 (fr) 2012-07-13 2012-07-13 Procédé et appareil d'un moteur à combustion interne pour stocker les gaz d'échappement pendant un freinage de moteur et pour les mettre en recirculation dans la conduite d'admission

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019101336A1 (fr) * 2017-11-24 2019-05-31 Volvo Truck Corporation Procédé de commande d'un système de turbocompresseur et système de turbocompresseur pour un moteur à combustion
WO2020244757A1 (fr) * 2019-06-05 2020-12-10 Volvo Truck Corporation Procédé de démarrage du fonctionnement d'un moteur à combustion interne

Citations (7)

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Publication number Priority date Publication date Assignee Title
US4658781A (en) 1984-10-22 1987-04-21 Guinea Jose M R Kinetic energy utilization system for use with vehicles with internal combustion engine
DE3906312C1 (fr) * 1989-02-28 1989-12-21 Man Nutzfahrzeuge Ag, 8000 Muenchen, De
EP0531277A2 (fr) * 1991-09-02 1993-03-10 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Moteur à combustion interne comprenant un système d'admission et d'échappement, un turbocompresseur et un accumutateur de pression
EP0740065A1 (fr) * 1995-04-25 1996-10-30 Daf Trucks N.V. Moteur à combustion du type à pistons avec système de recirculation de gaz d'échappement et système pour l'utilisation dans un tel moteur
US6209324B1 (en) * 1998-05-02 2001-04-03 Daimlerchrysler Ag Exhaust turbocharger
DE102005048329A1 (de) * 2005-10-08 2007-04-12 Daimlerchrysler Ag Brennkraftmaschine mit einem Abgasturbolader
US20070113553A1 (en) * 2004-07-21 2007-05-24 Renault Trucks Device and process for overfeeding compressed gas to an intake pipe of a turbocharged engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658781A (en) 1984-10-22 1987-04-21 Guinea Jose M R Kinetic energy utilization system for use with vehicles with internal combustion engine
DE3906312C1 (fr) * 1989-02-28 1989-12-21 Man Nutzfahrzeuge Ag, 8000 Muenchen, De
EP0531277A2 (fr) * 1991-09-02 1993-03-10 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Moteur à combustion interne comprenant un système d'admission et d'échappement, un turbocompresseur et un accumutateur de pression
EP0740065A1 (fr) * 1995-04-25 1996-10-30 Daf Trucks N.V. Moteur à combustion du type à pistons avec système de recirculation de gaz d'échappement et système pour l'utilisation dans un tel moteur
US6209324B1 (en) * 1998-05-02 2001-04-03 Daimlerchrysler Ag Exhaust turbocharger
US20070113553A1 (en) * 2004-07-21 2007-05-24 Renault Trucks Device and process for overfeeding compressed gas to an intake pipe of a turbocharged engine
DE102005048329A1 (de) * 2005-10-08 2007-04-12 Daimlerchrysler Ag Brennkraftmaschine mit einem Abgasturbolader

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019101336A1 (fr) * 2017-11-24 2019-05-31 Volvo Truck Corporation Procédé de commande d'un système de turbocompresseur et système de turbocompresseur pour un moteur à combustion
US11371421B2 (en) 2017-11-24 2022-06-28 Volvo Truck Corporation Method for controlling a turbocharger system and a turbocharger system for a combustion engine
WO2020244757A1 (fr) * 2019-06-05 2020-12-10 Volvo Truck Corporation Procédé de démarrage du fonctionnement d'un moteur à combustion interne
CN113924414A (zh) * 2019-06-05 2022-01-11 沃尔沃卡车集团 用于启动内燃发动机的运行的方法
US11608807B2 (en) 2019-06-05 2023-03-21 Volvo Truck Corporation Method for starting operation of an internal combustion engine

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