EP3353405B1 - Vorrichtung zur kühlung einer abgasrückführungsschleife eines kraftfahrzeugmotors - Google Patents

Vorrichtung zur kühlung einer abgasrückführungsschleife eines kraftfahrzeugmotors Download PDF

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Publication number
EP3353405B1
EP3353405B1 EP16750932.2A EP16750932A EP3353405B1 EP 3353405 B1 EP3353405 B1 EP 3353405B1 EP 16750932 A EP16750932 A EP 16750932A EP 3353405 B1 EP3353405 B1 EP 3353405B1
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Prior art keywords
temperature
engine
bypass
cooling
ref
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EP16750932.2A
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English (en)
French (fr)
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EP3353405A1 (de
Inventor
Vincent Pierre AVONS
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Renault SAS
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Renault SAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M26/13—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
    • F02M26/22—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
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • 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
    • 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
    • F02M26/33—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 controlling the temperature of the recirculated gases

Definitions

  • the invention relates to a device for cooling an exhaust gas recirculation loop in a motor vehicle engine, and more particularly to a high pressure exhaust gas recirculation loop.
  • An exhaust gas recirculation loop also known under the name EGR, from the English Exhaust Gas Recirculation, has the function of allowing the recirculation of the gases burnt by an internal combustion engine of a motor vehicle and their new combustion. , in order to improve performance and reduce fuel consumption and polluting emissions from the internal combustion engine.
  • An exhaust gas recirculation loop generally comprises a recirculation duct, having a first end connected to the engine exhaust duct and a second end connected to the engine intake duct.
  • a recirculation valve is mounted on the recirculation duct and makes it possible to control the quantity of exhaust gas returned upstream of the engine and mixed with the fresh air admitted.
  • the exchanger generally comprises a bypass, or bypass duct allowing the recirculated exhaust gases to avoid said exchanger. This prevents excessive cooling of the exhaust gases. However, by inhibiting the cooling of the recirculated gases during the engine starting phase, pollutant emissions are increased.
  • the document FR2879669 discloses a device for cooling a high pressure exhaust gas recirculation loop.
  • the aim of the invention is to optimize the management of the cooling of the gases recirculated in the exhaust gas recirculation circuit, with a view to improving the efficiency of the engine, and to reducing pollutant emissions. and to avoid the deterioration of elements of the recirculation loop.
  • actuating the bypass means actuating the corresponding bypass valve to circulate the gases in said bypass or, in other words, to make them avoid the corresponding cooler.
  • the reference temperature of the engine coolant is advantageously between 55 ° C and 65 ° C.
  • the reference temperature of the fluid of the independent cooling circuit is preferably between 50 ° C and 60 ° C.
  • the reference temperature of the outside air is then advantageously between -10 ° C and 5 ° C.
  • control module comprises a first engine speed sensor, a second engine load sensor and a computer capable of calculating the operating point of the vehicle engine based on the data respectively measured by. the first detector and by the second detector and to compare said operating point with a reference operating point, said control module being configured to inhibit the actuation of the by-passes of the first heat exchanger and of the second heat exchanger when the point operating point exceeds the reference operating point.
  • FIG 1 We have represented on the figure 1 an internal combustion engine 2 of a motor vehicle, comprising a cooling circuit shown in figure 2 and an engine control device shown in figure 3 .
  • the engine 2 comprises a casing 4 comprising a plurality of cylinders 6 inside which the combustion of the mixture consisting of air and fuel takes place.
  • Each cylinder 6 of the crankcase 4 is connected on one side to an intake duct 8, and on the other side to an exhaust duct 10.
  • the engine 2 comprises a turbocharger 12, provided with a turbine 14 mounted on the exhaust duct 10, and a compressor 16 mounted on the intake duct 8.
  • the intake duct 8 is thus divided into a low pressure intake duct 18 located upstream of the compressor 16 and a duct d 'high pressure intake 20 located between the compressor 16 and the housing 4.
  • the exhaust duct 10 is divided into a high pressure exhaust duct 22 located between the housing 4 and the turbine 14 and an exhaust duct low pressure 24 located downstream of the turbine 14.
  • An intake flap 26 is mounted on the high pressure intake duct 22 and makes it possible to control the flow of air admitted into the cylinders 6 of the engine 2.
  • a temperature sensor 27 of the exhaust gases is mounted on the high pressure exhaust duct 22.
  • the engine 2 further comprises an exhaust gas recirculation circuit, comprising a recirculation duct 28 connected at one of its ends to the exhaust duct 10 and at the other of its ends to the intake duct 8.
  • This recirculation circuit is at high pressure, because the recirculation duct 28 is connected to the exhaust and high intake ducts. pressure 22 and 20.
  • the recirculation circuit is at low pressure, in which case the recirculation duct 28 would be connected to the low pressure exhaust and intake ducts 24 and 18
  • the exhaust gas recirculation circuit further comprises a recirculation valve 30, mounted on the recirculation duct 28.
  • a first cooler 32 is mounted on the recirculation duct 28, between the point of connection of the duct 28 to the exhaust duct 10 and the recirculation valve 30.
  • a bypass 34, or bypass circuit of the first cooler 32 comprises a duct 36. and a bypass valve 38.
  • the bypass valve 38 can be actuated in two different switching modes, a first "bypass 1 active” mode and a second "bypass 1 inactive” mode.
  • the bypass valve 38 is actuated according to the "bypass 1 active” mode, the burnt gases flowing in the recirculation duct 28 from the exhaust duct 10 to the intake duct 8 are diverted by the valve 38 and pass through the bypass duct 36. In this mode, the recirculated gases therefore do not pass through the first cooler 32.
  • the bypass valve 38 is actuated according to the “bypass 1 inactive” mode, the burnt gases circulating in the recirculation duct 28 pass through the bypass valve. cooler 32 and do not pass through the bypass duct 36.
  • a second cooler 40 is mounted on the recirculation duct 28, between the recirculation valve 30 and the point of connection of the duct 28 to the intake duct 8.
  • a bypass 42 comprises a duct 44 and a bypass valve 46.
  • the valve bypass 46 can be actuated according to a first “bypass 2 active” mode, in which the recirculated gases pass through the conduit 46 and do not pass through the second cooler 40.
  • the bypass valve 46 can be actuated according to a second “bypass 2 inactive” mode. » In which the recirculated gases pass through the second cooler 40 and do not pass through the conduit 44.
  • the engine 2 comprises a first cooling circuit 48 and a second cooling circuit 50, both intended to contain a cooling fluid.
  • Two drain conduits 52 connect the cooling circuits 48 and 50 and each include an "all-or-nothing" valve 54.
  • the valves 54 are closed so that no exchange of fluid. cooling takes place between the cooling circuits 48 and 50.
  • the cooling circuits 48 and 50 operate independently.
  • the first cooling circuit 48 comprises a main pipe 56 in heat exchange relation with the casing 4 of the engine 2.
  • a water pump 58 is mounted on the main pipe 56 and generates a flow of cooling fluid passing through the casing 4.
  • the cooling fluid circulating in the main pipe 56 takes heat from the casing 4.
  • a temperature sensor 60 is placed in the main pipe 56, downstream of the casing 4.
  • the cooling circuit 48 comprises a first return pipe 62, on which are mounted a regulator 64 and a radiator 66.
  • the regulator 64 lets the cooling fluid circulate which passes through the radiator 66.
  • the radiator 66 is preferably mounted in a flow of fresh air, for example under the hood or behind the grille of the motor vehicle. Thus, the cooling fluid passing through the radiator 66 is cooled, before passing again through the pump 58 and then through the casing 4.
  • the first cooling circuit 48 comprises a second return pipe 68 in heat exchange relation with the first cooler 32.
  • the operation of the first cooler 32 depends on the switching mode of the bypass valve 38.
  • the valve 38 When the valve 38 is actuated according to the “bypass 1 inactive” mode, the cooling fluid circulating in the second return pipe 68 draws heat from the recirculated gases passing through the first cooler 32.
  • the valve 38 When the valve 38 is actuated according to the mode "Bypass 1 active", the cooling fluid circulating in the second return pipe 68 does not take heat.
  • the second cooling circuit 50 comprises a closed loop 70 on which a pump 72 is mounted so as to generate a flow of cooling fluid circulating in the loop 70.
  • the loop 70 is in a heat exchange relationship with the second cooler 40.
  • the operation of the second cooler 40 depends on the switching mode of the bypass valve 46.
  • the valve 46 is actuated according to the “bypass 2 inactive” mode, the cooling fluid circulating in the loop 70 draws off heat to the recirculated gases passing through the second cooler 40. Otherwise, there is no heat transfer.
  • a temperature sensor 74 is disposed in the flow of hydraulic fluid circulating in the loop 70, downstream of the second cooler 40.
  • a radiator 76 is mounted on the loop 70 between the sensor 74 and the pump 72. In this way. , the cooling fluid which has taken heat from the recirculated gases is then cooled by passing through the radiator 76.
  • the first cooling circuit 48 comprises a third return pipe 78 provided with an “all-or-nothing” valve 80 and an additional radiator 82.
  • the additional radiator 82 is in a heat exchange relationship with the radiator 76 of the device.
  • second cooling circuit 50 The third return pipe 78 and its components have the function of allowing the heating of the cooling fluid circulating in the second cooling circuit 50, when said cooling fluid is too cold to cool the recirculated gases.
  • the internal combustion engine 2 is controlled by an engine control device 86.
  • the engine control device 86 collects the data sent by the temperature sensors 47, 60 and 74, which respectively provide the information on the temperature of the exhaust gases at the engine outlet, the temperature of the coolant downstream of the casing 4 of the engine and of the temperature of the fluid circulating in the independent cooling circuit, downstream of the second cooler 40.
  • the engine control device 86 is connected to an air temperature sensor 87 placed outside the motor vehicle , and comprises the hardware and software means to know the speed of rotation and the load of the engine 2.
  • the engine control device 86 controls the intake flap 26, the recirculation valve 30, the bypass valve 38, the bypass valve 46, the regulator 64 and the "all-or-nothing" valve 80.
  • the engine control device 86 collects in particular the signals Chg (load of engine 2), Reg (engine speed), T EXT (outside air temperature), T F1 (temperature of the fluid circulating in the cooling circuit 48 of the engine) and T F2 (temperature of the fluid circulating in the cooling circuit 50 independent of the cooling circuit 48 of the engine).
  • the engine control device 86 comprises a computer 88 capable of calculating the operating point of the engine 2 from the load Chg and the speed of rotation Reg, and a comparator 90 capable of comparing said operating point with a reference value.
  • the control device 86 also comprises one of other comparators 92, 94 and 96, each being capable of respectively comparing a temperature T F1 , T F2 and T EXT with a reference temperature T F1_REF , T F2_REF and T EXT_REF which is therefor. clean.
  • the engine control device 86 emits output signals, among which a control signal S 26 of the intake flap 26, a control signal S 30 of the recirculation valve 30, a control signal S 38 of the discharge valve. bypass 38 and a control signal S 46 from bypass valve 46.
  • This process can be initiated at any time when the vehicle engine is turned off.
  • the method comprises a first step E01 of detecting the contact. During this step, it is detected whether the ignition key of the motor vehicle has been actuated. As long as the ignition key has not been actuated, we remain at step E01. As soon as the vehicle's ignition key is actuated, we go to a second step E02.
  • the engine control device 86 starts the internal combustion engine 2 and closes the recirculation valve 30. At the same time, it actuates the bypass valve 38 according to the "bypass 1 active mode”. ”And the bypass valve 46 according to the“ bypass 2 active ”mode. Thus, at the end of step E02, the engine is running and the recirculation of the exhaust gases is inactive.
  • step E03 the engine control device 86 detects whether the request for recirculation of the exhaust gases must be requested.
  • the recirculation request can be sent by an electronic card (not shown) of the engine control device 86, capable of determining an opening instruction of the recirculation valve 30 as a function of various parameters, such as the operating mode of engine 2. , the temperature of the exhaust gases measured by the temperature sensor 27 or the pressure on the accelerator pedal, the gear ratio chosen.
  • step E03 we continue to apply step E03.
  • step E04 we go to a fourth step E04, during which the engine control device 86 actuates the recirculation valve 30.
  • part of the gas from The exhaust from the engine 2 borrows the recirculation duct 28 to be reinjected upstream of the engine, and is not cooled.
  • step E05 it is determined whether the operating point of engine 2 requires cooling of the recirculated gases.
  • the engine control device 86 determines the rotational speed Reg and the load Chg of the engine 2.
  • the device 86 calculates the operating point of the engine 2 and compares it with a reference operating point. According to the result of the comparison, the device 86 determines whether the point of operation of engine 2 requires or does not require cooling of the exhaust gases. For example, the cooling of the exhaust gases can be imposed if the load of the engine 2 exceeds a reference load value, or if the rotational speed of the engine 2 exceeds a reference speed value. If, at the end of step E05, the device 86 detects that the operating point of the engine 2 imposes cooling, we go to step E10 which will be detailed below. If the operating point does not require cooling, a test step E06 is applied.
  • step E06 it is determined whether the temperature of the outside air prohibits the cooling of the recirculated gases.
  • the engine control device 86 measures the temperature T EXT of the outside air and compares it with a reference temperature T EXT_REF of outside air.
  • the temperature T EXT_REF is between -1 ° C and 1 ° C, and advantageously equal to 0 ° C.
  • the temperature T EXT_REF is between -8 ° C and -6 ° C, and preferably equal to -7 ° C.
  • step E07 If the comparison shows that the temperature T EXT is lower than the temperature T EXT_REF , the temperature of the outside air is too low to allow the cooling of the recirculated gases and we return to step E05. If, conversely, the comparison shows that the temperature T EXT is greater than the temperature T EXT_REF , a following test step E07 is applied.
  • step E07 it is determined whether the temperature T F1 of the cooling fluid circulating in the first cooling circuit 48 prohibits the cooling of the recirculated gases.
  • the temperature T F1 is measured by means of the sensor 60 and it is determined whether it is lower than a first temperature T F1_REF of the reference coolant.
  • the temperature T F1_REF is between 55 ° C and 65 ° C, and preferably between 58 ° C and 62 ° C. If the comparison shows that the temperature T F1 is lower than the temperature T F1_REF , we return to step E05. If, conversely, the temperature T F1 is greater than the temperature T F1_REF , a following test step E08 is applied.
  • step E08 it is determined whether the temperature T F2 of the cooling fluid circulating in the second cooling circuit 50 allows the cooling of the gases recirculated by one or two coolers.
  • the temperature T F2 is measured by means of the sensor 74 and it is determined whether it is lower than a second temperature T F2_REF of the reference coolant.
  • the temperature T F2_REF is between 45 ° C and 55 ° C, and preferably between 48 ° C and 52 ° C. If the comparison shows that the temperature T F2 is lower than the temperature T F2_REF , a step E09 is applied. If, conversely, the temperature T F2 is greater than the temperature T F2_REF , a step E10 is applied.
  • step E09 the engine control device 86 actuates the bypass valve 38 according to the “bypass 1 inactive” mode.
  • Bypass valve 46 remains in “bypass 2 active” mode.
  • step E10 the engine control device 86 actuates the bypass valve 38 according to the “bypass 1 inactive” mode and the bypass valve 46 according to the “bypass 2 inactive” mode.
  • the recirculated exhaust gases are cooled, according to a level intercooler or higher. If the temperature of the cooling fluid circulating in the independent cooling circuit 50 is too low, the recirculated exhaust gases are cooled according to the intermediate level, that is to say by the cooler 32 alone. If the temperature of the fluid cooling circulating in the independent cooling circuit 50 is not too low, the recirculated exhaust gases are cooled according to the upper level, that is to say by the two coolers 32 and 40.
  • this control method and this cooling device make it possible to optimize the cooling of the recirculated gases by separate management of the two coolers and their associated bypass.
  • the cooling of the recirculated gases can be implemented in three different cooling levels, which are determined based on engine operating data and external data.
  • the invention then makes it possible to increase more rapidly the temperature of the gases admitted into the engine 2 during the engine temperature rise phase, then to effectively cool the recirculated gases in order to reduce polluting emissions.
  • the cooling of the recirculated gases according to an intermediate cooling level and a higher cooling level allows improved reliability of the exhaust gas recirculation circuit, in particular avoiding damage to the exchanger and / or the recirculation valve.
  • the invention limits the stress on other antipollution device, such as the nitrogen oxides trap, the nitrogen oxides post-treatment device or a selective catalytic reduction (SCR) device.
  • SCR selective catalytic reduction
  • a cooling device according to the invention can be easily manufactured, given that it comprises two identical coolers provided with two identical by-passes.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Claims (4)

  1. Kühlvorrichtung einer Hochdruck-Abgasrückführungsschleife (28) eines Motors (2) eines Kraftfahrzeugs, die einen ersten Wärmetauscher (32) in Wärmeaustauschbeziehung mit dem Kühlkreislauf (48) des Motors (2), einen Bypass (34) des ersten Wärmetauschers (32) und ein Steuermodul (86) enthält, das ein Bypass-Ventil (38) gemäß einem Modus "Bypass 1 aktiv" oder "Bypass 1 inaktiv" betätigen kann, und ein anderes Bypass-Ventil (46) gemäß einem Modus "Bypass 2 aktiv" und "Bypass 2 inaktiv" betätigen kann, wobei das Steuermodul (86) fähig ist, den Bypass (34) des ersten Wärmetauschers (32) mittels des Bypass-Ventils (38) gemäß dem Modus "Bypass 1 aktiv" zu betätigen, wobei die Kühlvorrichtung einen zweiten Wärmetauscher (40) in Wärmeaustauschbeziehung mit einem Kühlkreislauf (50) unabhängig vom Kühlkreislauf (48) des Motors (2) enthält, wobei der zweite Wärmetauscher (40) in der Strömung der rückgeführten Gase bezüglich des ersten Wärmetauschers (32) in Reihe montiert ist, wobei die Kühlvorrichtung einen Bypass (42) des zweiten Wärmetauschers (40) enthält, wobei das Steuermodul (86) fähig ist, den Bypass (42) des zweiten Wärmetauschers (40) mittels des Bypass-Ventils (46) gemäß einem Modus "Bypass 2 aktiv" zu betätigen, wobei die Kühlvorrichtung ein Rückführungsventil (30) enthält, dadurch gekennzeichnet, dass das Ventil zwischen dem ersten und dem zweiten Wärmetauscher (32, 40) auf die Rückführungsleitung (28) montiert ist, wobei das Rückführungsventil (30) zwischen den Bypässen (34, 42) montiert ist, und dass das Steuermodul (86) Temperaturfühler (60, 74, 87), die die Temperatur (TF1) des im Kühlkreislauf (48) des Motors (2) zirkulierenden Mediums, die Temperatur (TF2) des im zweiten Kühlkreislauf (50) zirkulierenden Kühlmediums, die Temperatur (TEXT) der Außenluft messen können, und Komparatoren (92, 94 und 96) enthält, die dazu bestimmt sind, eine Temperatur (TF1, TF2, TEXT) mit einer ihm eigenen Bezugstemperatur (TF1_REF, TF2_REF, TEXT_REF) zu vergleichen, wobei das Steuermodul (86) fähig ist, einen Öffnungssollwert des Rückführungsventils (30) abhängig von verschiedenen Parametern zu bestimmen, und parametriert ist, in dieser Reihenfolge durchzuführen:
    - das Steuermodul (86) enthält einen Detektor der Drehzahl (Reg) des Motors (2), einen Detektor der Last (Chg) des Motors (2) und einen Rechner (88), der fähig ist, den Betriebspunkt des Motors (2) des Fahrzeugs abhängig von Daten (Reg, Chg) zu berechnen, die von den Drehzahl- bzw. Lastdetektoren (Reg, Chg) gemessen werden, und den Betriebspunkt mit einem Bezugsbetriebspunkt zu vergleichen, wobei das Steuermodul (86) parametriert ist, die Betätigung der Bypässe (34, 42) des ersten Wärmetauschers (32) und des zweiten Wärmetauschers (40) zu verhindern, wenn der Betriebspunkt den Bezugsbetriebspunkt überschreitet,
    - eine Messung der Temperatur (TEXT) der Außenluft,
    - einen Vergleich der Temperatur (TEXT) der Außenluft mit einem Bezugsdatenwert (TEXT_REF), so dass, wenn die Temperatur (TEXT) der Außenluft höher als der Bezugsdatenwert (TEXT_REF) ist,
    - eine Messung der Temperatur (TF1) des im Kühlkreislauf (48) des Motors (2) zirkulierenden Mediums durchgeführt wird, dann
    - einen Vergleich des gemessenen Datenwerts (TF1) mit einem Bezugsdatenwert (TF1_REF), und
    - eine Betätigung des Bypasses (34) des ersten Wärmetauschers (32), so lange die Temperatur (TF1) niedriger als der Bezugsdatenwert (TF1_REF) ist,
    - eine Messung der Temperatur (TF2) des im zweiten Kühlkreislauf (50) zirkulierenden Kühlmediums, sobald die Temperatur (TF1) höher ist als der Bezugsdatenwert (TF1_REF),
    - eine Betätigung des Bypasses (42) des zweiten Wärmetauschers (40), so lange die Temperatur (TF2) des Kühlmediums niedriger als eine zweite Temperatur (TF2_REF) des Bezugskühlmediums ist, wobei die Motorkontrollvorrichtung (86) das Bypass-Ventil (38) gemäß dem Modus "Bypass 1 inaktiv" betätigt, während das Bypass-Ventil (46) gemäß dem Modus "Bypass 2 aktiv" bleibt.
  2. Kühlvorrichtung nach Anspruch 1, wobei die Bezugstemperatur (TF1_REF) des Kühlmediums des Motors zwischen 55°C und 65°C liegt.
  3. Kühlvorrichtung nach Anspruch 1 oder 2, wobei die Bezugstemperatur (TF2_REF) des Mediums des unabhängigen Kühlkreislaufs (50) zwischen 50°C und 60°C liegt.
  4. Kühlvorrichtung nach einem der Ansprüche 1 bis 3, wobei die Bezugstemperatur (TEXT_REF) der Außenluft zwischen -10°C und 5°C liegt.
EP16750932.2A 2015-07-16 2016-07-07 Vorrichtung zur kühlung einer abgasrückführungsschleife eines kraftfahrzeugmotors Active EP3353405B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1556693A FR3038937B1 (fr) 2015-07-16 2015-07-16 Dispositif de refroidissement d'une boucle de recirculation des gaz d'echappement d'un moteur de vehicule automobile
PCT/FR2016/051728 WO2017009549A1 (fr) 2015-07-16 2016-07-07 Dispositif de refroidissement d'une boucle de recirculation des gaz d'échappement d'un moteur de véhicule automobile

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EP3353405A1 EP3353405A1 (de) 2018-08-01
EP3353405B1 true EP3353405B1 (de) 2021-05-05

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FR (1) FR3038937B1 (de)
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JP2004044484A (ja) * 2002-07-11 2004-02-12 Toyota Motor Corp 内燃機関の制御装置
FR2879669B1 (fr) * 2004-12-20 2007-03-09 Renault Sas Groupe motopropulseur comportant des moyens de commande du debit et de regulation de la temperature des gaz d'echappement en recirculation
JP2007040141A (ja) * 2005-08-02 2007-02-15 Toyota Motor Corp Ｅｇｒクーラシステム
DE102006057489B4 (de) * 2006-12-06 2014-07-10 Audi Ag Brennkraftmaschine und Verfahren zum Betreiben einer Brennkraftmaschine
GB2473821A (en) * 2009-09-23 2011-03-30 Gm Global Tech Operations Inc Exhaust gas recirculation system with multiple coolers
GB2509737A (en) * 2013-01-11 2014-07-16 Gm Global Tech Operations Inc Exhaust gas recirculation (EGR) system with active control of EGR coolant temperature

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EP3353405A1 (de) 2018-08-01
FR3038937A1 (fr) 2017-01-20
FR3038937B1 (fr) 2018-10-12
WO2017009549A1 (fr) 2017-01-19

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