EP3870819A1 - Method for early opening of a cold thermostat in an engine cooling system - Google Patents
Method for early opening of a cold thermostat in an engine cooling systemInfo
- Publication number
- EP3870819A1 EP3870819A1 EP19786378.0A EP19786378A EP3870819A1 EP 3870819 A1 EP3870819 A1 EP 3870819A1 EP 19786378 A EP19786378 A EP 19786378A EP 3870819 A1 EP3870819 A1 EP 3870819A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- thermostat
- opening
- fluid
- command
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 134
- 101100385237 Mus musculus Creg1 gene Proteins 0.000 claims abstract description 33
- 230000033228 biological regulation Effects 0.000 claims description 43
- 230000009849 deactivation Effects 0.000 claims description 19
- 230000004913 activation Effects 0.000 claims description 12
- 230000003213 activating effect Effects 0.000 claims description 6
- 239000012809 cooling fluid Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 239000013529 heat transfer fluid Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- BIIBYWQGRFWQKM-JVVROLKMSA-N (2S)-N-[4-(cyclopropylamino)-3,4-dioxo-1-[(3S)-2-oxopyrrolidin-3-yl]butan-2-yl]-2-[[(E)-3-(2,4-dichlorophenyl)prop-2-enoyl]amino]-4,4-dimethylpentanamide Chemical compound CC(C)(C)C[C@@H](C(NC(C[C@H](CCN1)C1=O)C(C(NC1CC1)=O)=O)=O)NC(/C=C/C(C=CC(Cl)=C1)=C1Cl)=O BIIBYWQGRFWQKM-JVVROLKMSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001960 triggered effect Effects 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
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
-
- 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
- F01P2070/00—Details
- F01P2070/04—Details using electrical heating elements
Definitions
- TITLE EARLY OPENING OF A COLD THERMOSTAT IN AN ENGINE COOLING SYSTEM
- the present invention relates to a process for early opening of a cold thermostat in a cooling system of a heat engine, advantageously of a motor vehicle.
- the present invention also relates to a cooling system for the implementation of such an opening method, advantageously in a motor vehicle.
- a cooling system of a heat engine comprises a main cooling circuit for circulation of a cooling fluid provided with at least one fluid temperature sensor, the main cooling circuit passing through the engine thermal and taking heat from it.
- the cooling system also includes a heat exchange circuit for cooling the fluid, this heat exchange circuit comprising at least one or more radiators.
- a thermostat controlled by a control unit forming part of the cooling system, operates an at least partial closing and opening of the heat exchange circuit.
- the control unit has control means controlling the thermostat according to a regulation command as a function of at least a first predetermined setpoint temperature saved in storage means. There can be two set temperatures with a low temperature and a high set temperature.
- cold thermostat in the context of the present invention, is meant a thermostat which has two very different temperatures between the temperature of the coolant in the main circuit and the temperature of the coolant in the heat exchange circuit.
- a thermostat is a mechanical system which opens from a certain temperature of the coolant and lets the fluid pass to the radiator of the heat exchange circuit to be cooled.
- a controlled thermostat is a thermomechanical system, which controls the opening temperature of the heat exchange circuit or circuit of the radiator (s). It is thus possible to regulate the temperature of the coolant.
- At least two set values are defined, including a high regulation set point and a low regulation set point in order to find the best compromise between, on the one hand, the reduction of friction and the reduction of the dilution of fuel in the oil, which corresponds to the high regulation setpoint and, on the other hand, the thermomechanical behavior of the engine, which corresponds to the low regulation setpoint.
- the thermostat consists of a wax cartridge.
- the wax while expanding, opens the coolant passage section.
- Controlling the thermostat consists of heating the wax, to shift the opening point to a lower temperature.
- a cooling system control unit calculates a pre-order, a proportional command and a full command, according to the set point to be reached and several other pieces of information. The sum of these three commands defines the command to be applied to the thermostat to comply with the setpoint, also called the regulation command.
- the parameters for controlling the thermostat by the control unit are optimized to ensure the best setpoint monitoring, in stabilized mode.
- the two sides of the thermostat corresponding respectively to the main circuit and to the heat exchange circuit are at very different temperatures.
- the side directed towards the heat engine therefore towards the main circuit is in contact with a hot fluid while the side directed towards the radiator and the heat exchange circuit is in contact with a cold fluid, because the fluid has not still circulated through the radiator and the engine and was not supplied with hot fluid from the main circuit.
- Document CN-A-107893697 describes a method for controlling an electronic thermostat of a fluid circulation cooling system of a motor vehicle engine.
- the method provides for the monitoring of a set fluid temperature.
- the setpoint temperature of the fluid is corrected by a correction coefficient which is a function of the vehicle speed and of the selected reduction ratio.
- a temperature difference between the current temperature and the set temperature thus corrected is followed and the opening of the thermostat is regulated according to the difference.
- the disclosure of this document does not, however, relate to a large temperature difference between the fluid in the main circuit of the system passing through the heat engine and the fluid in the heat exchange circuit for cooling the fluid, this difference affecting the thermostat operation and efficiency.
- the problem underlying the present invention is, in a fluid cooling system of a heat engine with a thermostat controlled for the opening of a heat exchange circuit of the fluid still cold from '' a main circuit passing through the already hot engine, correct the regulation command according to the state of the art taking into account the temperature difference between the fluid of the main circuit and the fluid of the heat exchange circuit not yet sufficiently hot.
- the present invention relates to a process for the early opening of a cold piloted thermostat in a coolant cooling system of a heat engine, the piloted thermostat operating a closing and at least partial opening of a circuit. heat exchange with respect to a main cooling circuit of the system, the thermostat being controlled by an opening regulation command from an effective temperature of the fluid and a set temperature, characterized by an establishment of a corrective command to open the thermostat when a first difference between the current fluid temperature and the set temperature is less by less than a first predetermined temperature difference threshold and when at least one operating condition of the engine or at minus an external climatic condition has been recognized by experience as causing a temperature difference between re the respective fluids of the heat and main exchange circuits above a temperature difference threshold between respective fluids.
- the present invention provides for implementing a corrective control for opening the thermostat so that the temperature of the fluid in force does not exceed the set temperature and then falls below the set temperature, the overshoot of the set temperature may cause activation of the cooling system fan, which is detrimental in terms of consumption.
- a temperature difference between the respective fluids of the heat and main exchange circuits above of a temperature difference threshold between respective fluids was chosen to monitor at least one operating condition of the engine or at least one external climatic condition which is experimentally known to cause a temperature difference between the respective fluids of the heat and main exchange circuits above a temperature difference threshold between respective fluids.
- the heat engine is a motor vehicle engine, said at least one operating condition of the heat engine being a running condition of the motor vehicle.
- said at least one driving condition is selected individually or in combination from the following driving conditions: a first opening of the thermostat after a cold engine start following a stop of at least 45 minutes, a speed of more than 80 km / H driving with thermostat closed for a period of more than thirty minutes or said at least one climatic condition is selected individually or in combination from the following climatic conditions: an outdoor temperature of less than 5 ° C, rainy or windy weather.
- the temperature of the fluid in the main circuit will rise rapidly while the temperature of the fluid in the heat exchange circuit remains cold, especially if the outside temperature is low and if the heat exchange circuit is strongly ventilated or at least does not recover calories.
- a final thermostat opening command is established after comparison of the opening regulation command and the corrective opening command, with a final percentage of opening of the thermostat, the final command d opening of the thermostat controlled being that of the two controls activating only the opening of the thermostat or that activating the opening of the thermostat with the largest opening percentage becoming the final opening percentage of the thermostat when the two controls activate the opening of the thermostat.
- the setpoint regulation If the regulation command offers a higher opening percentage than the corrective command, a setpoint regulation is kept. Conversely, if the regulation command offers a opening percentage lower than the corrective command, the setpoint regulation, then not being active or not very active, can be replaced by the corrective command with its specific opening percentage. The most frequent case, however, is that the corrective command completely anticipates the regulation command which would not then have triggered, in isolation, an opening of the piloted thermostat.
- the final opening percentage is corrected downward as a function of the temperature of the fluid by giving a corrected final opening percentage being lower and lower the higher the temperature of the fluid.
- the limited opening percentage is used to protect the opening means of the fluid heat exchange circuit which is frequently a controlled thermostat, there may be a protection function for the controlled thermostat for which the control of the thermostat will be limited as a function of the fluid temperature.
- This function is not intended to avoid an abrupt opening, the response time of the thermostat is 10 to 20 seconds but to ensure the durability of the thermostat. To avoid an abrupt opening of the thermostat, we will act on the regulator settings, and especially on the design of the thermostat, so that it opens gradually.
- At least one deactivation condition is established to stop the activation of the corrective opening command.
- a fluid temperature gradient being defined at a given instant, a gradient threshold being predetermined corresponding to an opening of the thermostat, a maximum duration of the corrective control being predetermined, a second temperature difference threshold being predetermined by being lower than the first temperature difference threshold and a third temperature difference threshold being predetermined by being greater than the first temperature difference threshold, said at least one deactivation condition is selected from the following conditions taken individually or in combination : the temperature gradient equal to or less than the gradient threshold, a duration of application of the corrective command greater than the maximum duration, the difference of prevailing fluid temperature with the fluid setpoint temperature below the second threshold or above the third threshold.
- the difference in fluid temperature is less than or equal to the first threshold, for example -10 ° C, this occurs if the fluid temperature setpoint increases.
- the fluid temperature difference is greater than or equal to the second threshold, for example 5 ° C., this occurs if the fluid temperature setpoint decreases, or if the fluid temperature gradient is large by being greater than for example 0.5 ° C / s.
- the regulation command is established by being the sum of a pre-command, an integral command and a proportional command.
- the invention relates to a cooling system for a heat engine of a motor vehicle comprising a main cooling circuit for circulating a cooling fluid provided with at least one fluid temperature sensor and an exchange circuit thermal for cooling the fluid, a controlled thermostat operating an at least partial closing and opening of the heat exchange circuit, a control unit having control means controlling the thermostat according to a regulation command as a function of at least one predetermined temperature setpoint saved in storage means, the system implementing such a method, characterized in that the control unit comprises means for receiving the temperature of the fluid, means for calculating a difference in the fluid temperature with the set temperature, means for storing a first temperature difference threshold pr means, for estimating a temperature difference between the respective fluids of the heat and main exchange circuits above a temperature difference threshold between respective fluids as a function of at least one driving condition or at least one external climatic condition identified by detection means and means for establishing a corrective thermostat opening command.
- Such a cooling system in particular by its control unit, aims to anticipate the control of a cold thermostat, with respect to the temperature regulation setpoint function of coolant.
- the anticipation of opening is done on a condition of difference between the temperature of the fluid in effect and the temperature of reference which can then drop, but this is not necessarily the case, as well as an estimate of a thermostat cold with two different temperatures on the side of the main circuit and the heat exchange circuit.
- control unit comprises means for determining a percentage of opening of the piloted thermostat for regulating control and for corrective control and means for selecting the highest percentage of opening as final percentage of opening. a final command to open the piloted thermostat.
- FIG. 1 is a representation of an embodiment of a flow diagram of the process for the early opening of a cold piloted thermostat in a cooling system by heat transfer fluid of a heat engine according to the present invention
- FIG. 2 illustrates, as a function of time t, a regulation setpoint temperature curve for a thermostat in a cooling system and an effective temperature curve for cooling fluid, a corrective control curve according to invention, a regulation control curve according to the state of the art, this for two different cases with mention of three temperature differences between current fluid temperature and setpoint temperature.
- the figures are given by way of examples and are not limitative of the invention. They constitute schematic representations of principle intended to facilitate understanding of the invention.
- the present invention relates to a process for early opening of a cold piloted thermostat in a cooling system by heat transfer fluid of a heat engine.
- the thermostat controlled operates an at least partial closing and opening of a heat exchange circuit with respect to a main cooling circuit of the system, for example according to various degrees of opening or a single degree of complete opening.
- a thermostatically controlled cold means that the temperature of the fluid Tf of the heat exchange circuit is low by not having had time to heat and is close to the current temperature Tf outside and even lower while the temperature of the fluid Tf of the main circuit begins to heat due to the operation of the heat engine, in particular the running of a motor vehicle powered by the heat engine, which means that there is a large temperature difference referenced dT on both sides of the thermostat, advantageously greater at 20 ° C.
- the thermostat is controlled by a control command Creg opening from a current temperature Tf of the fluid and a set temperature Tcons.
- a fluid temperature regulator module 1 delivers a pre-command preC, a proportional command Cprop and an integral command Cint from a fluid temperature and a regulation setpoint temperature Tcons.
- the pre-command preC, the proportional command Cprop and the integral command Cint are summed in a summing module 2 to give a control command Creg.
- a corrective control Ccor for opening the thermostat is established, completely independent of the control command Creg. This is implemented, according to a first condition, when a difference between the current temperature Tf of fluid and the setpoint temperature Tcons is less than a first predetermined temperature difference threshold, this first threshold being referenced SI in the figure 1.
- this is implemented, according to a second condition, when at least one operating condition of the engine or at least one external climatic condition has been previously recognized by experience as causing a temperature difference dT between the respective fluids of the circuits d 'heat and main exchange above a temperature difference threshold between respective fluids.
- the difference between the set temperature Tcons and a selected temperature a few degrees below the control set temperature Tcons is taken, for example from 1 to 10 ° C less than the set temperature Tcons.
- This selected temperature can be chosen so that the thermostat is controlled before the Creg control command is effective and controls the thermostat itself.
- an activation module 3 of the corrective control Ccor activates this corrective control Ccor from an effective temperature Tf of fluid, a setpoint temperature Tcons of regulation, a deviation fluid temperature equal to the fluid temperature subtracted from the regulation setpoint temperature and a temperature difference dT between the two sides of the thermostat, i.e. between the fluid temperature in the main circuit and the temperature of the fluid in the heat exchange circuit.
- this difference in temperature dT between the two sides of the thermostat cannot be easily measured, it is considered at least one operating condition of the motor or at least one condition outdoor climate recognized as capable of causing a difference greater than a temperature difference threshold on both sides of the predetermined thermostat.
- the activation module 3 of the corrective command Ccor then issues an activation request act.
- the heat engine can be a motor vehicle engine.
- said at least one operating condition of the heat engine can be a driving condition of the motor vehicle.
- the driving condition (s) can be selected individually or in combination from the following driving conditions: a first opening of the thermostat after a cold engine start following a stop of at least 45 minutes, which gives the time for the engine to cool down almost completely, a driving speed of more than 80 km / h with the thermostat closed for a period of more than thirty minutes, which can lead to pronounced cooling of the fluid in the heat exchange circuit and vice versa consequent heating of the main circuit fluid.
- the climatic condition (s) can be selected individually or in combination from the following climatic conditions: an outside temperature of less than 5 ° C, rainy or windy weather.
- one or more driving conditions with one or more climatic conditions. For example, during a start-up after a shutdown period of 45 minutes at an outside temperature below 5 ° C, it is very likely that the fluid in the heat exchange circuit is cold while the fluid in the main circuit will heat up for taxiing closed.
- the activation request act sent by the activation module 3 of the corrective command Ccor is transmitted to a generation module 4 of a corrective command Ccor.
- the module 4 for generating a corrective command Ccor can also receive a deactivation request from a deactivation module 5 for the corrective command Ccor. At least one deactivation condition can be established to stop the activation of the corrective opening Ccor command.
- the deactivation module 5 sends, if necessary, a deactivation request for deactivation as a function of a fluid temperature, of a setpoint temperature Tcons of regulation, of a duration of the corrective command Ccor in comparison with a predetermined duration maximum of the corrective control Ccor, of a temperature gradient GT defined at a given instant, a gradient threshold being predetermined to correspond to an opening of the thermostat, of a second temperature difference in comparison with a second threshold S2 of predetermined temperature difference by being less than the first threshold of temperature difference SI and by a third temperature difference in comparison with a third threshold S3 of predetermined temperature difference by being greater than the first threshold SI of temperature difference.
- the deactivation condition (s) can be selected from the following conditions taken individually or in combination: the temperature gradient GT being equal to or less than the gradient threshold, the duration of application D of the corrective control Ccor being greater than the maximum duration predetermined of the corrective control Ccor, the temperature difference in force Tf of fluid with the set temperature Tcons of fluid being less than the second threshold S2 or being greater than the third threshold S3.
- the temperature gradient threshold GT can be equal to -0.3 ° C / s, the temperature gradient GT being equal to or less than the gradient threshold for deactivation.
- the duration of application D of the corrective command Ccor may have exceeded a maximum predetermined duration of the corrective command Ccor by 20 seconds for deactivation.
- a difference in current temperature Tf of fluid with the setpoint temperature Tcons of fluid below the second threshold S2, for example of -10 ° C, can also be a deactivation condition. This can happen, for example, if the set temperature of the medium increases.
- a different temperature difference Tf of fluid with the setpoint temperature Tcons of fluid greater than the third threshold S3 for example of 5 ° C can be another deactivation condition. This occurs if the setpoint temperature of the fluid decreases or if the temperature gradient GT of the fluid is large, for example being greater than 0.5 ° C / s.
- the generation module 4 issues a corrective command Ccor to a comparison module 6 also receiving a command Creg regulation module by summation module 2.
- Temperature differences are defined between the current temperature Tf of fluid and the set temperature Tcons by subtracting the set temperature Tcons from the current temperature Tf of fluid.
- a final command Cfin for opening the thermostat can be established after comparison of the control command Creg opening and the corrective command Ccor opening in the comparison module 6.
- the final command Cfin d ' thermostat opening can integrate a final thermostat opening percentage.
- the final control Cfin opening of the controlled thermostat is that activating the opening of the thermostat with the largest percentage of opening.
- Figure 2 shows four cases of implementation of the regulation method according to an embodiment of the present invention, the cases being shown superimposed two by two to this figure 2.
- the first case is in the upper part on the left of Figure 2
- the second case being in the upper right part of Figure 2 while the third case is in the lower part on the left of Figure 2 and the fourth case is in the lower part to right of figure 2.
- the values SI, S2 and S3 are respectively the first, second and third thresholds previously mentioned, the second temperature difference threshold S2 being less than the first temperature difference threshold SI and the third temperature difference threshold S3 being higher than the first threshold SI of temperature difference.
- the corrective control Ccor allows the thermostat to be opened while the regulation control Creg did not allow it.
- the current temperature Tf of fluid will not exceed the setpoint temperature Tcons and for example not oscillate in overshoot and down around this setpoint temperature Tcons as when an opening of the thermostat is carried out by the control Creg regulator as foreseen by the state of the art.
- the current temperature Tf of the fluid does not reach the setpoint temperature Tcons and the corrective command Ccor is stopped.
- the current temperature Tf of the fluid begins to rise without its deviation from the setpoint temperature Tcons exceeding the first threshold SI.
- the vertical arrow pointing down indicates a drop in temperature.
- the drop in the setpoint temperature Tcons activates the regulation and the regulation control Creg by maintaining the opening of the thermostat.
- the corrective command Ccor was stopped because the difference in temperature in force Tf of fluid with the set temperature Tcons of fluid is greater than the third threshold S3, which is shown by the arrow of the third threshold S3 not reaching the current temperature curve Tf of fluid.
- the setpoint temperature Tcons is then increased without implementing the Creg regulation command, which causes the corrective Ccor command to stop.
- the corrective command Ccor is stopped owing to the fact that the current temperature difference Tf of fluid with the set temperature Tcons of fluid is greater than the third threshold S3, which is shown by the arrow of the third threshold S3 not reaching the current temperature curve Tf of fluid.
- the Creg control command continues to be activated.
- the current temperature curve Tf of fluid which had exceeded the setpoint temperature Tcons descends towards the setpoint temperature Tcons by tangent without exceeding it from below and then rises.
- the final opening percentage of the thermostat can be corrected downward as a function of the temperature of the fluid Tf by giving a corrected final opening percentage being lower and lower the higher the temperature of the fluid Tf increases, this to protect the thermostat.
- the invention relates to a cooling system for a heat engine of a motor vehicle comprising a main cooling circuit for circulating a cooling fluid provided with at least one Tf fluid temperature sensor and a circuit for heat exchange for cooling the fluid.
- a controlled thermostat operates an at least partial closing and opening of the heat exchange circuit.
- a control unit has control means controlling the thermostat according to a Creg regulation command as a function of at least one predetermined setpoint temperature Tcons saved in storage means.
- the cooling system implements an early opening process for the piloted thermostat when it is cold.
- the control unit comprises means for receiving the temperature of the fluid Tf, means for calculating a difference in the temperature of the fluid Tf with the set temperature Tcons, means for storing a first threshold SI of predetermined temperature difference.
- the control unit comprises means for estimating a temperature difference dT between the respective fluids of the heat and main exchange circuits above a temperature difference threshold between respective fluids as a function of at least one driving condition or at least one external climatic condition identified by detection means.
- the control unit finally comprises means for establishing a corrective control Ccor for opening the thermostat, and, optionally, means for deactivating the corrective control Ccor.
- the control unit can comprise means for determining a percentage of opening of the piloted thermostat for the Creg regulation command and for the Ccor corrective command.
- the control unit comprises means for selecting the highest opening percentage by taking it as the final opening percentage of a final command Cfin to open the controlled thermostat.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1871275A FR3087488B1 (en) | 2018-10-23 | 2018-10-23 | PROCESS FOR EARLY OPENING OF A COLD THERMOSTAT IN AN ENGINE COOLING SYSTEM |
PCT/FR2019/052086 WO2020084203A1 (en) | 2018-10-23 | 2019-09-10 | Method for early opening of a cold thermostat in an engine cooling system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3870819A1 true EP3870819A1 (en) | 2021-09-01 |
EP3870819B1 EP3870819B1 (en) | 2023-03-01 |
Family
ID=65444250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19786378.0A Active EP3870819B1 (en) | 2018-10-23 | 2019-09-10 | Method for early opening of a cold thermostat in an engine cooling system |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3870819B1 (en) |
CN (1) | CN112955637B (en) |
FR (1) | FR3087488B1 (en) |
WO (1) | WO2020084203A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115031455A (en) * | 2022-04-13 | 2022-09-09 | 天津大学 | Heat recovery control method and device, electronic equipment and storage medium |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3932277B2 (en) * | 2002-10-18 | 2007-06-20 | 日本サーモスタット株式会社 | Control method of electronic control thermostat |
DE10337413A1 (en) * | 2003-08-14 | 2005-03-10 | Daimler Chrysler Ag | Method of regulating the flow of coolant with a heater shut-off valve |
FR2896272B1 (en) * | 2006-01-19 | 2012-08-17 | Renault Sas | METHOD AND DEVICE FOR CONTROLLING THE FIRST OPENING OF A THERMOSTAT REGULATING THE TEMPERATURE OF AN INTERNAL COMBUSTION ENGINE. |
FR2929330B1 (en) * | 2008-04-01 | 2010-04-09 | Peugeot Citroen Automobiles Sa | ENGINE COOLING CIRCUIT. |
DE102009042745A1 (en) * | 2009-09-25 | 2011-03-31 | Att Automotivethermotech Gmbh | Method for operating cooling and heating circulation system of motor vehicle, involves supercharging and intercooling internal combustion engine by coolants, and supplying coolant from cooling pump to heat exchanger |
FR3016399B1 (en) * | 2014-01-15 | 2016-01-22 | Renault Sas | METHOD OF ESTIMATING THE OPENING PROPORTION OF A VALVE EQUIPPED WITH A THERMOSTAT AND COOLING SYSTEM OF A DRIVE MOTOR OF A MOTOR VEHICLE COMPRISING A THERMOSTAT |
WO2015107288A1 (en) * | 2014-01-15 | 2015-07-23 | Renault S.A.S. | Thermostat device for motor vehicle cooling system, cooling system fitted with such a thermostat device and method of controlling a heating module |
FR3052185B1 (en) * | 2016-06-07 | 2018-06-15 | Peugeot Citroen Automobiles Sa | METHOD FOR FILLING A COOLING CIRCUIT WITH A COOLANT FLUID |
CN107893697B (en) | 2017-11-24 | 2020-04-07 | 奇瑞汽车股份有限公司 | Electronic thermostat opening control method |
-
2018
- 2018-10-23 FR FR1871275A patent/FR3087488B1/en active Active
-
2019
- 2019-09-10 WO PCT/FR2019/052086 patent/WO2020084203A1/en unknown
- 2019-09-10 CN CN201980070396.8A patent/CN112955637B/en active Active
- 2019-09-10 EP EP19786378.0A patent/EP3870819B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
FR3087488B1 (en) | 2020-12-18 |
WO2020084203A1 (en) | 2020-04-30 |
CN112955637A (en) | 2021-06-11 |
EP3870819B1 (en) | 2023-03-01 |
FR3087488A1 (en) | 2020-04-24 |
CN112955637B (en) | 2024-03-12 |
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