EP2895715A1 - Procede de gestion de la circulation d'un liquide de refroidissement - Google Patents
Procede de gestion de la circulation d'un liquide de refroidissementInfo
- Publication number
- EP2895715A1 EP2895715A1 EP13762176.9A EP13762176A EP2895715A1 EP 2895715 A1 EP2895715 A1 EP 2895715A1 EP 13762176 A EP13762176 A EP 13762176A EP 2895715 A1 EP2895715 A1 EP 2895715A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- coolant
- circulation
- temperature
- recirculation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002826 coolant Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 71
- 239000007789 gas Substances 0.000 claims abstract description 61
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 239000000567 combustion gas Substances 0.000 claims abstract description 9
- 230000003134 recirculating effect Effects 0.000 claims description 21
- 238000007726 management method Methods 0.000 claims description 15
- 239000000110 cooling liquid Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 4
- 230000002123 temporal effect Effects 0.000 claims 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000007872 degassing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- 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
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
-
- 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
-
- 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
- F01P2060/08—Cabin heater
-
- 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
- F01P2060/16—Outlet manifold
Definitions
- the invention relates to the management of the powertrain temperature of a motor vehicle.
- the engine coolant outlet box includes, for each outlet of the box, a valve whose position is controlled by a control system and is in the closed position during the imposition of the engine coolant. zero flow (the coolant pump is in operation, however, and pressurizes the coolant in the dedicated engine lines).
- a recirculation valve is disposed downstream of the engine and allows to distribute, depending on the circumstances, the combustion gases to the exhaust and / or to admission through the recirculation circuit.
- the recirculation circuit comprises a gas cooler and, in parallel with the latter, a bypass line, a cooling valve for distributing the recirculating gases to the gas cooler and / or the bypass line.
- the assembly formed by the recirculation valve, the gas cooler, the bypass line and the cooling valve forms a recirculation module. In operation, the recirculation module stresses the coolant and may require a minimum coolant flow rate.
- the present invention thus relates to a method for managing the circulation of a cooling liquid in a branch of a cooling circuit, the branch comprising a cooling device of the combustion engine and a cooling system of the cooling module. recirculation, the configuration of the branch not allowing to impose a lack of coolant flow rate for the engine cooling device and a non-zero flow of coolant for the cooling system of the module.
- the invention aims to solve one or more of the disadvantages arising from this situation, and in particular ensure the necessary cooling given the life situation of the recirculation module in cases where the life situation of the engine imposes a zero flow coolant.
- the invention thus relates to a method for managing the circulation of a coolant in a branch of a cooling circuit of a motor vehicle, the branch comprising a cooling device of a combustion engine. and a cooling system of a combustion engine recirculation module of the combustion engine, the method imposing a zero flow of coolant in the branch when operating parameters of the combustion engine meet the first criteria, characterized in it imposes a circulation of coolant in the branch although the operating parameters of the engine meet the first criteria when parameters of the recirculation module of the gas meet at least a second criterion.
- the invention thus makes it possible to respond to the powertrain temperature management constraints related to the minimization of energy consumption while guaranteeing the cooling efficiency of the cooling module, this efficiency becoming a priority over minimization. of energy consumption.
- this invention makes it possible to avoid an additional cost compared to other solutions that would consist of having two branches (a first branch comprising the device of engine cooling, a second branch comprising the cooling system of the recirculation module) being separable from each other with additional hoses, and at least one connecting valve of the two branches and / or a pump additional coolant.
- a second criterion requiring circulation of the cooling liquid in the branch is the circulation of gas recirculation through a gas cooler which is part of the cooling system of the module. recirculation.
- the coolant is circulated to achieve this cooling.
- a second criterion requiring circulation of the coolant in the branch is the stopping of the circulation of gas recirculation through the gas cooler for a time less than a first duration of security.
- a second criterion imposing a circulation of coolant in the branch is the achievement of a maximum critical temperature of coolant which is in a cooling architecture of a recirculation valve which allows the distribution of combustion gases between the exhaust and recirculation, the cooling architecture of the valve forming part of the cooling system of the recirculation module.
- the coolant is circulated in order to cool the recirculation valve which is naturally heated by the temperature of the recirculating gases therethrough (the recirculation valve comprising, like the combustion engine, a pipe architecture specific to cooling) before the maximum critical temperature is reached (before the boiling of the coolant).
- a second criterion requiring a circulation of coolant in the branch is stopping the flow of gas in the recirculation module for a time less than a second period of safety.
- the temperature of the coolant in the cooling architecture of the recirculation valve is equal to the sum of the initial temperature of the coolant measured at the output of the engine and an elevation of the coolant temperature at the valve determined from the flow and temperature of the recirculating gases and the time passed since the recirculation of the gases.
- the temperature rise of the coolant is equal to a product between the time spent since the circulation of the gas and a time gradient of temperature rise.
- the time gradient of temperature rise is determined as a function of the flow rate of the recirculating gases and their temperature.
- the initial temperature of the coolant measured at the output of the engine is the temperature at the moment when the flow and temperature values of the recirculating gases give for the first time a time gradient of elevation. nonzero temperature.
- the coolant when the coolant is circulated by the realization of one of the second criteria, it circulates, either through a heater or along a bypass line of engine.
- Figure 1 illustrates a cooling circuit of a motor vehicle, the circuit comprising a branch which comprises a cooling device of a combustion engine and a cooling system of a module for recirculating the combustion gases of the engine, the flow rates of the cooling liquid in the cooling device and in the cooling system being dependent on each other.
- a motor vehicle to which the present invention applies comprises a combustion engine which is supplied with air by a pipe intake and produces combustion gases that are exhausted to the outside via an exhaust pipe.
- the combustion engine comprises a cooling device 1 formed by specific cooling lines for the coolant.
- the vehicle also comprises a flue gas recirculation circuit which allows to introduce into the intake duct flue gas.
- the motor vehicle comprises a recirculation module.
- This recirculation module comprises a recirculation valve disposed downstream of the engine and for distributing, depending on the circumstances, the combustion gases to the exhaust and / or to the intake duct via the recirculation circuit.
- the recirculation valve comprises a pipe-specific cooling architecture in which the coolant can circulate.
- the recirculation module also comprises a gas cooler which is disposed between the recirculation valve and its junction with the intake pipe.
- the gas cooler is used to cool the recirculating gases before reintroduction into the engine.
- the recirculation module finally comprises, on the one hand, a bypass line which is arranged between the recirculation valve and the junction with the inlet pipe, in parallel with the gas cooler, and, on the other hand, a cooling valve which is arranged between the recirculation valve and the gas cooler and which distributes the recirculating gases between the gas cooler and the bypass line.
- the vehicle also comprises a cooling circuit 2 which allows to cool the combustion engine and the recirculation module.
- This circuit 2 comprises a branch 3 which comprises the cooling device 1 of the engine and a cooling system 4 of the recirculation module, the cooling system 4 comprising the gas cooler and the cooling architecture of the valve of recirculation.
- the flow rates of the coolant in the cooling system 4 of the recirculation module and that in the cooling device 1 of the engine are dependent on one another, that is to say that a zero flow of the coolant in one of these two members causes a zero flow in the other organs.
- the cooling circuit 2 also comprises, in order to allow the cooling of the coolant, a radiator 5 which is usually disposed on the front of the vehicle, a heater 6 which produces a flow of hot air that can be oriented. in the passenger compartment of the vehicle, and a bypass line 7 which bypasses the engine remotely.
- the cooling circuit 2 also comprises a degassing box 8.
- the cooling circuit 2 further comprises a coolant pump 9 which is driven by the engine, and a coolant outlet box 10 through which the coolant after passing through the engine and the module cooling, leaves the powertrain to be cooled.
- the coolant box 10 comprises three outlet ports: a first connected to the radiator 5, a second connected to the heater 6, and a third connected to the bypass duct 7.
- a valve 1 1, 12, 13 is associated which makes it possible to open or close the corresponding orifice, and thus, when the three orifices are closed, to impose a zero flow rate on the coolant in the branch 3 and therefore in the cooling device 1 of the engine and in the cooling system 4 of the recirculation module.
- the coolant circulation management method imposes a zero flow of the coolant in the branch 3 when operating parameters of the combustion engine meet the first criteria.
- a criterion is, for example, the temperature of the lubricating oil lower than a minimum temperature from which the coolant is recirculated (opening of at least one of the valves 1 1, 12, 13 associated with the ports of the coolant outlet box 10).
- the coolant circulation management method in the branch 3 requires a circulation of this liquid, while the operating parameters of the combustion engine meet the first criteria, when parameters of the gas recirculation module meet at least a second criterion.
- the circulation of recirculation gas through the gas cooler causes the circulation of the coolant through the same cooler to cool the recirculating gas.
- the attainment of a maximum critical temperature for the coolant disposed in the cooling architecture of the recirculation valve causes the coolant to circulate in order to prevent the liquid from boiling. cooling and damage to the recirculation valve.
- the stopping of one or the other of these two situations for a period of less than a safety period causes the maintenance of the circulation of the coolant. to ensure a good cooling of the cooling system of the recirculation module.
- the temperature of the coolant in the cooling architecture of the recirculation valve is equal to the sum of the initial temperature of the coolant measured at the output of the engine and a rise in temperature of the coolant at valve level determined from the flow rate and temperature of the recirculating gases and the time elapsed since the recirculation of the gases.
- the temperature rise of the coolant is equal to a product between the time elapsed since the circulation of the gases and a time gradient of temperature rise which, in this case, is determined as a function of the flow rate of the recirculating gas and their temperature (here, by mapping).
- the initial coolant temperature measured at the engine output is the temperature at which the flow and temperature values of the recirculating gases give for the first time a time lapse of non-zero temperature rise.
- the outlets of the coolant box 10 which are open are, depending on the cooling required. , the orifice connected to the heater 6 and / or that connected to the bypass line 7. It would also be possible to open the orifice connected to the radiator 5.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1258545A FR2995353B1 (fr) | 2012-09-12 | 2012-09-12 | Procede de gestion de la circulation d’un liquide de refroidissement |
PCT/FR2013/051952 WO2014041273A1 (fr) | 2012-09-12 | 2013-08-20 | Procede de gestion de la circulation d'un liquide de refroidissement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2895715A1 true EP2895715A1 (fr) | 2015-07-22 |
EP2895715B1 EP2895715B1 (fr) | 2021-04-14 |
Family
ID=47022939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13762176.9A Active EP2895715B1 (fr) | 2012-09-12 | 2013-08-20 | Procede de gestion de la circulation d'un liquide de refroidissement |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2895715B1 (fr) |
FR (1) | FR2995353B1 (fr) |
WO (1) | WO2014041273A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3036135A1 (fr) * | 2015-05-13 | 2016-11-18 | Peugeot Citroen Automobiles Sa | Circuit de refroidissement d’un moteur |
DE102019105505A1 (de) * | 2019-03-05 | 2020-09-10 | Bayerische Motoren Werke Aktiengesellschaft | Kühlmittelkreislauf in einem Fahrzeug |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10144844B4 (de) * | 2001-09-06 | 2014-06-05 | Behr Thermot-Tronik Gmbh | Thermostatventil |
DE102004018675A1 (de) * | 2004-04-17 | 2005-11-17 | Deere & Company, Moline | Kühlsystem einer Brennkraftmaschine und Brennkraftmaschine |
EP2025910B1 (fr) * | 2007-07-30 | 2009-12-02 | Cooper-Standard Automotive (Deutschland) GmbH | Système de recirculation des gaz d'échappement |
JP5223389B2 (ja) * | 2008-03-12 | 2013-06-26 | トヨタ自動車株式会社 | 内燃機関の冷却装置 |
JP2012145008A (ja) * | 2011-01-11 | 2012-08-02 | Toyota Motor Corp | 内燃機関の制御装置 |
JP5288046B2 (ja) * | 2011-06-22 | 2013-09-11 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
-
2012
- 2012-09-12 FR FR1258545A patent/FR2995353B1/fr not_active Expired - Fee Related
-
2013
- 2013-08-20 EP EP13762176.9A patent/EP2895715B1/fr active Active
- 2013-08-20 WO PCT/FR2013/051952 patent/WO2014041273A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014041273A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2995353A1 (fr) | 2014-03-14 |
WO2014041273A1 (fr) | 2014-03-20 |
EP2895715B1 (fr) | 2021-04-14 |
FR2995353B1 (fr) | 2014-09-26 |
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