EP3094842B1 - Verfahren zum steuern eines beheizbaren thermostatventils - Google Patents

Verfahren zum steuern eines beheizbaren thermostatventils Download PDF

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Publication number
EP3094842B1
EP3094842B1 EP14827828.6A EP14827828A EP3094842B1 EP 3094842 B1 EP3094842 B1 EP 3094842B1 EP 14827828 A EP14827828 A EP 14827828A EP 3094842 B1 EP3094842 B1 EP 3094842B1
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EP
European Patent Office
Prior art keywords
thermostat
temperature
engine
module
controlled thermostat
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EP14827828.6A
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English (en)
French (fr)
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EP3094842A1 (de
Inventor
Christophe Piard
Stephane Ruby
Christophe VIEL
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Renault SAS
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Renault SAS
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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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/62—Load
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/64—Number of revolutions
    • 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
    • F01P2060/04—Lubricant cooler
    • 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
    • F01P2070/00—Details
    • F01P2070/04—Details using electrical heating elements

Definitions

  • the present invention relates generally to the cooling of the drive motor in a motor vehicle.
  • It relates more particularly to a method for controlling a controlled thermostat of a cooling circuit of a heat engine driving a vehicle.
  • Motor vehicles are conventionally equipped with a system for cooling their drive engine (for example, an internal combustion engine).
  • a system for cooling their drive engine for example, an internal combustion engine.
  • Such a cooling system generally comprises at least one radiator having the function of cooling a liquid transported by pipes between the radiator and a cooling circuit internal to the engine.
  • radiator and pipes can also be connected to the external cooling circuit formed by the radiator and the pipes, such as, for example, an air heater, a turbocharger or a water-oil exchanger.
  • the cooling circuit may further include a thermostat controlled by a heating element, as described in DE10318355-A1 .
  • the present invention provides a method according to claim 1.
  • the figure 1 shows the main elements of a cooling system of an internal combustion engine 2 of a motor vehicle.
  • This engine is here a compression ignition engine (Diesel).
  • Diesel compression ignition engine
  • spark ignition engine gasoline
  • the cooling system comprises a radiator 6, mounted for example at the front of the motor vehicle in order to receive the air flow generated by the movement of the vehicle, and an air heater 8 which allows the heating of the vehicle interior.
  • the internal combustion engine 2 is traversed by a cooling liquid which ensures its operation at a set temperature. given as explained below.
  • the coolant (heated by the engine 2) is transported by pipes to the thermostat 4 on the one hand, to the radiator 6 and to the heater 8 on the other hand. After cooling in these elements, the cooling liquid is transported by pipes to the engine 2 for cooling thereof.
  • thermostat 4 The coolant is transported from engine 2 (outlet) to engine 2 (inlet) through thermostat 4 permanently so that thermostat 4 is always in contact with a flow of coolant regardless of the state. thermostat 4 (open or closed).
  • the cooling system may optionally further include a water-oil exchanger 12 which receives the cooling liquid from the engine 2 as input. After passing through the water-oil exchanger 12, the cooling liquid is reinjected into the circuit described below. above, for example at the thermostat 4.
  • a water-oil exchanger 12 which receives the cooling liquid from the engine 2 as input. After passing through the water-oil exchanger 12, the cooling liquid is reinjected into the circuit described below. above, for example at the thermostat 4.
  • the use of the water-oil exchanger does not fall within the scope of the present invention and will therefore not be described in detail here.
  • the coolant is however transported from the radiator 6 to the engine 1 through a thermostatic valve or thermostat 4 which regulates the quantity of cooled coolant (from the radiator 6) to be injected into the inlet of the engine 1 in order to obtain the desired temperature.
  • a thermostatic valve or thermostat 4 which regulates the quantity of cooled coolant (from the radiator 6) to be injected into the inlet of the engine 1 in order to obtain the desired temperature. engine operating mode, as explained below.
  • the coolant at the outlet of the engine 2 can be used to regulate the temperature within a turbocharger 14 supplied for this purpose with coolant by a bypass of the circuit linking the engine 2 and the air heater 8.
  • a temperature sensor 10 is also mounted in the coolant pipes located at the outlet of the engine 2 in order to measure the temperature Ts of the coolant at the outlet of the engine 2.
  • no means are provided for measuring the temperature of the cooling liquid at the inlet of the engine 2 (temperature T E ), or at the level of the thermostat 4 (temperature T 4 ).
  • T E temperature of the cooling liquid at the inlet of the engine 2
  • T 4 temperature T 4
  • the figures 2a and 2b represent the thermostat 4 in two distinct operating positions, respectively a first position in which the thermostat closes the pipe connecting the radiator 6 to the engine 2 and a second position in which the thermostat opens this pipe.
  • the thermostat 4 comprises a rod (or “pencil” ) 20 on which is slidably mounted an assembly formed of a brass body 22 and a valve (or flap) 26.
  • the space left free between the body 22 and the rod 20 is filled with a material sensitive to heat, here wax 24 sealed in this space delimited by body 22, valve 26 and rod 20.
  • the thermostat 4 is positioned in the pipe connecting the radiator 6 to the engine 2 so that its body 22 bathes in the coolant of temperature T 4 at this location, as indicated above; the body 22 is therefore located downstream of the valve 26 in this pipe.
  • Cooling liquid from the radiator 6 (cooled by the latter) is thus injected into the cooling circuit of the engine 2 and therefore participates in the cooling of the engine.
  • a return spring (not shown) is generally provided to facilitate the return of the valve 26 to its closed position when the temperature T 4 of the cooling liquid decreases and the wax cools and contracts.
  • the thermostat 4 also comprises an electrical resistance (not shown), installed for example inside the rod 20 and electrically connected to an electrode 28.
  • the application of a voltage V to the electrode 28 causes a current to flow through the resistor which releases heat by the Joule effect and therefore accelerates the rise in temperature of the wax 24.
  • the thermostat 4 will therefore open more. rapidly than in the absence of heating by the resistance, that is to say for a coolant temperature T 4 below the aforementioned threshold.
  • the thermostat 4 is a controlled thermostat.
  • a calorific power lower than the maximum calorific power can be obtained by applying the nominal voltage V 0 on a proportion only of the period of time considered (principle of the modulation by width of pulses or PWM of the English " Pulse Width Modulation” ): it is considered in the following that one applies in this case a useful voltage V lower than the nominal voltage V 0 .
  • the figure 3 shows an example of a control system for thermostat 4 in accordance with the teachings of the invention.
  • the control system of the figure 3 includes several modules, shown here in functional form. Several functional modules can however in practice be implemented by the same processing unit programmed to carry out the processing operations assigned respectively to these functional modules.
  • This processing unit is for example an engine control computer 30 (or ECU standing for “Engine Control Unit ”) fitted to the vehicle, or a processing unit dedicated to controlling the thermostat 4.
  • load information C (expressed in Nm) and engine speed information N (expressed in rpm), representative of the operation of engine 2, are available in the calculator 30.
  • This information C, N is transmitted on the one hand to a module 32 for determining a temperature setpoint T C and on the other hand to a module 36 for evaluating the temperature T 4 of the cooling liquid at the thermostat. 4.
  • the setpoint determination module 32 develops the temperature setpoint T C as a function of the engine speed N and of the load C on the basis of a map stored in the processing unit which implements the module 32.
  • the module 32 is designed to determine the temperature setpoint T C by reading a value associated with the engine speed N and load C values received from the computer 30 in a correspondence table (mapping) stored in the processing unit concerned .
  • the setpoint determination module 32 generates for example setpoints T C between 90 ° C and 110 ° C adapted to the different operating conditions of the engine 2 encountered (represented by the load C and the engine speed N).
  • the setpoint T C can take a discrete set of values, for example 90 ° C, 100 ° C or 110 ° C.
  • the temperature setpoint T C generated by the setpoint determination module 32 is transmitted to a regulation module 34, which also receives the temperature T s of the cooling liquid at the outlet of the engine measured by the temperature sensor 10.
  • the regulation module 34 determines the gross useful voltage V R to be applied to the electrode of the controlled thermostat 4 in order to make the temperature of the coolant converge towards the setpoint Tc.
  • the regulation law applied by the regulation module 34 to determine the gross useful voltage V R as a function of the measured temperature T s and of the setpoint temperature T C depends on the envisaged application.
  • the raw useful voltage V R generated by the regulation module 34 is transmitted to a correction module 40, the operation of which will be described below.
  • the module 36 for evaluating the temperature T 4 of the coolant at the level of the thermostat 4 receives as input the temperature T s measured by the measurement sensor 10 and an estimated value L of travel of the thermostat 4, as well as, as already indicated, the load C and engine speed N information representative of engine operation 2.
  • the estimated travel value L of the thermostat 4 is produced as explained in more detail below by a module 38 intended for this purpose.
  • the module 36 evaluates the temperature T 4 of the coolant at the level of the thermostat 4, for example according to the method described in detail below with reference to the figures 6 and 7 .
  • the module 36 could be replaced by a temperature sensor immersed in the cooling liquid at the level of the thermostat 4.
  • the already mentioned stroke evaluation module 38 receives as input the temperature T 4 of the cooling liquid at the thermostat (produced by the evaluation module 36 in the example described) and the useful voltage value actually applied to the thermostat. controlled 4 (corrected useful value Vc generated by the correction module 40 as explained below).
  • the module 38 evaluates the travel L of relative displacement of the rod 20 and of the body 22, which gives an estimate of the proportion of opening of the thermostat 4.
  • module 38 is for example carried out by implementing a digital model, as described below with reference to figures 4a, 4b and 5 .
  • this evaluation can be carried out by reading the travel L associated, in a prerecorded correspondence table, with the values of temperature T 4 and of useful applied voltage Vc received at the input.
  • the preset values were determined by means of preliminary tests or simulations, carried out beforehand, using the digital model described with reference to figures 4a, 4b and 5 .
  • the module 38 can thus supply a value L representative of the travel of the thermostat 4 to the correction module 40, which also receives as input the gross useful voltage V R calculated by the regulation module 34 as already indicated.
  • the correction module 40 corrects this value so that a minimum useful voltage is effectively applied to the electrode 28 of the controlled thermostat 4 so that the resistance delivers a non-zero calorific power, which makes it possible to preheat the wax 24 to a limit temperature for opening the thermostat 4.
  • any additional heating of the wax 24 in response to a command from the system control to open the thermostat) will immediately open the valve.
  • the correction module 40 also causes a limitation of the useful voltage Vc applied (and therefore of the calorific power delivered by the resistor by the Joule effect) so that the application of this voltage Vc does not cause heating greater than that resulting in total opening of thermostat 4 (i.e. a stroke L equal to the maximum stroke L max ). Additional heating is in fact unnecessary; it is furthermore detrimental to the weather reaction of the system when it is then desired to close the thermostat (since the additional heating of the wax 24 makes its cooling longer, then possibly its solidification).
  • the correction module 40 applies to the controlled thermostat 4 a useful voltage Vc which does not depend on the gross useful voltage V R received from the regulation module 34, but which is chosen to maintain the stroke L at its maximum value L max .
  • a slaving of the useful applied voltage Vc is used so that the evaluated stroke L is maintained between a predetermined value (here 0.95.L max ) and the maximum stroke L max . It is therefore in this case a closed loop control.
  • the processing unit which implements the correction module 40 stores for this purpose a correspondence table which indicates the maximum authorized useful voltage V max as a function of the travel L of the thermostat. These data are for example provided by the manufacturer of the thermostat.
  • the correction module 40 applies to the controlled thermostat 4 a useful voltage Vc equal to the gross useful voltage V R received at the input from the regulation module 34.
  • the figure 4a presents the model used in the example described here to simulate the thermal behavior of the different parts of the controlled thermostat 4 with a view to evaluating its stroke as explained below.
  • thermostat operation the characteristics of the different parts and interfaces are adapted so that equivalent results or curves, determined using the model, correspond to the test results or to the experimental curves. (Note that in this case it suffices to determine the products m 20 .C 20 , m 22 .C 22 , m 24 .C 24 and h 1 .S 1 , h 2 .S 2 , h 3 .S 3 , not each feature separately.)
  • the figure 5 represents an example of module 38 for evaluating the stroke of the controlled thermostat which uses the model which has just been described.
  • This module is for example implemented within a processing unit which notably memorizes the correspondence table linking the values of wax temperature T 24 and stroke L of the thermostat.
  • the module 38 receives as input the temperature T 4 of the coolant at the level of the thermostat 4 (evaluated by a dedicated module, such as the module 36 visible in figure 3 and described below with reference to figure 7 , or measured by a temperature sensor) and the useful voltage value Vc applied to thermostat 4.
  • the module 38 comprises a unit 102 for memorizing the instantaneous evaluation value of the temperature T 22 of the body 22, a unit 104 for memorizing the instantaneous evaluation value of the temperature T 24 of the wax 24 and a unit 106 for memorizing the instantaneous evaluation value of the temperature T 20 of the rod 20. As indicated above, at the start of the evaluation process, these units are initialized with the value T 4 of the temperature of the cooling liquid received in entrance.
  • Each iteration of the process begins with an estimate of the new temperature values T 20 and T 22 respectively of the rod 20 and of the body 22. This is done because these elements are close to the heat sources and their temperature. temperature is likely to change from the previous iteration.
  • the module 38 determines the change ⁇ T 20 of the temperature T 20 of the rod 20 during an iteration on the basis of the instantaneous values T 20 , T 24 of temperature and of the useful voltage Vc (received at the input ) as following.
  • a subtracter 148 receives the instantaneous value T 20 from the unit 106 and subtracts it from the instantaneous value T 24 received from the unit 104.
  • the value generated by the subtracter 148 is multiplied by h 1 .S 1 within a multiplier 150.
  • an adder 152 the value obtained at the output of multiplier 150 and the power P J generated by the resistor, determined as a function of the useful voltage Vc applied to the resistor by means of a conversion unit 108.
  • the output of adder 152 is multiplied by 1 / (m 20 .C 20 ) within a multiplier 154 in order to obtain the desired change ⁇ T 20 (in accordance with the formula given above).
  • the output of the multiplier 154 (change ⁇ T 20 ) is added to the instantaneous value T 20 by an adder 156, which makes it possible to obtain at the output of the adder 156 the new instantaneous evaluation value of the temperature T 20 of the rod 20, which will be used by unit 106 in the next iteration (after passing for this purpose through a retarder 116).
  • the module 38 determines the change ⁇ T 22 of the temperature T 22 of the body 22 during an iteration on the basis of the instantaneous temperature values T 4 (received at input), T 22 , T 24 as follows.
  • a subtracter 120 receives the instantaneous value T 22 from the unit 102 and subtracts it from the instantaneous value T 4 received as input; similarly, a subtracter 122 receives the instantaneous value T 22 from the unit 102 and subtracts it from the instantaneous value T 24 received from the unit 104.
  • the values generated by the subtractors 120, 122 are respectively multiplied by h 3 .S 3 within a multiplier 124 and by h 2 .S 2 within a multiplier 126, then summed by an adder 128.
  • the output of adder 128 is multiplied by 1 / (m 22 .C 22 ) at within a multiplier 130 in order to obtain the desired change ⁇ T 22 (in accordance with the formula given above).
  • the output of the multiplier 130 (change ⁇ T 22 ) is added to the instantaneous value T 22 by an adder 132, which makes it possible to obtain at the output of the adder 132 the new instantaneous evaluation value of the temperature T 22 of the body 22, which will be used by the unit 102 at the next iteration (after passing for this purpose through a retarder 112).
  • the module 38 determines the change ⁇ T 24 of the temperature T 24 of the wax 24 during an iteration (here lasting one second) on the basis of the instantaneous values T 20 , T 22 , T 24 of temperature as follows.
  • the temperatures T 20 and T 22 used are those which have just been calculated as described above.
  • a subtracter 134 receives the instantaneous value T 24 from the unit 104 and subtracts it from the instantaneous value T 22 (as it has just been calculated) received from the adder 132; similarly, a subtracter 136 receives the instantaneous value T 24 from the unit 104 and subtracts it from the instantaneous value T 20 (as it has just been calculated) received from the adder 156.
  • the values generated by the subtractors 134, 136 are respectively multiplied by h 2 .S 2 within a multiplier 138 and by h 1 .S 1 within a multiplier 140, then summed by an adder 142.
  • the output of adder 142 is multiplied by 1 / (m 24 .C 24 ) within a multiplier 144 in order to obtain the desired change ⁇ T 24 (in accordance with the formula given above).
  • the output of the multiplier 144 (change ⁇ T 24 ) is added to the instantaneous value T 24 by an adder 146, which makes it possible to obtain at the output of the adder 146 the new instantaneous evaluation value of the temperature T 24 of the wax 24, which will be used by unit 104 in the next iteration (after passing for this purpose through a retarder 114).
  • the new instantaneous evaluation value of the temperature T24 is also transmitted to the input of a unit 110 for converting the wax temperature value into the stroke value L of the thermostat, on the basis of the correspondence table mentioned above relating the wax temperature and thermostat stroke values.
  • the figure 6 shows the heat exchanges involved in the cooling system at the level of the controlled thermostat and the motor.
  • the flow of cooling liquid which enters the engine 2 and passes through it in order to ensure its cooling is the sum of the flow Qo at the outlet of the air heater (and possibly of the turbocharger) and of the flow Q (L) at the outlet of the thermostat, which depends on the stroke L of the thermostat.
  • the calorific power yielded by the engine depends on its operating point, defined by load C and speed N.
  • the figure 7 thus represents an example of a module for evaluating the temperature T 4 of the cooling liquid at the level of the controlled thermostat.
  • This evaluation module receives as input a piece of information L representative of the travel of the thermostat 4 (determined here by means of the evaluation module 38, an example of which has been described with reference to figures 4a, 4b and 5 ), information relating to the operating point of the engine, here load C and engine speed N (supplied for example by the engine management unit or ECU), and the temperature T s of the coolant at the outlet of the engine , here measured by the temperature sensor 10.
  • the processing unit that implements the module of figure 7 stores a map of the power P (C, N) transferred to the coolant by the engine as a function of load C and engine speed N.
  • This map is a table which indicates the power values P transferred to the coolant by the motor respectively associated with pairs of values C, N.
  • This processing unit also stores a plurality of values Q (L) of coolant flow through the thermostat associated respectively with the different possible values for the stroke L.
  • a submodule 70 determines at each instant, by reading from the memory of the processing unit, the rate Q (L) associated with the stroke value L received. as a starter and power P (C, N) associated with the load C and engine speed N values received as input.
  • the temperature information T E (t) determined by the submodule 70 is applied to a retarder 72, to a subtracter 73 (which also receives the output of the retarder 72) and to an adder 76.
  • the adder also receives the input. output of the subtractor 73 after multiplying in a multiplier 75 by a constant b.
  • T 4 T E t - at + b .
  • T E t - T E t - 1 T E t - 1 .
  • the arrangement of the elements 72, 73, 75, 76, 78 which has just been described thus forms a sub-module 71 which determines the estimated value of the temperature T 4 of the coolant at the level of the thermostat 4 on the basis of the estimated value of the temperature T E of the coolant entering the engine 2.
  • the constants a and b are determined by preliminary tests and can be stored in the processing unit which implements the module of the figure 7 .
  • the parameters a and b are variable as a function of the thermal power taken by the water heater.
  • the parameters a and b are determined for various heating powers of the vehicle interior.
  • the values a and b are then determined at each moment as a function of the heating power (as indicated by a dedicated information received for example from the cabin heating management module).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Temperature (AREA)

Claims (1)

  1. Verfahren zur Steuerung eines geregelten Thermostaten (4) eines Kühlsystems eines Verbrennungsmotors (2) zum Antrieb eines Fahrzeugs, wobei das Verfahren die folgenden Schritte umfasst:
    a) Messung der Temperatur (TS) der in einer ersten Leitung des Kühlsystems fließenden Kühlflüssigkeit am Ausgang des Verbrennungsmotors (2),
    b) Erfassung wenigstens einer Information (C, N), die für einen Betriebsparameter des Verbrennungsmotors (2) repräsentativ ist,
    c) Schätzung des Hubes (L) des geregelten Thermostaten (4) mittels eines numerischen Modells, das den Wärmeaustausch zwischen einem elektrischen Widerstand des geregelten Thermostaten und einem Stift (20) des geregelten Thermostaten bei der Erwärmung des geregelten Thermostaten durch den Widerstand, den Wärmeaustausch zwischen dem Stift (20) und dem Wachs (24) des geregelten Thermostaten, den Wärmeaustausch zwischen dem Wachs (24) und dem Gehäuse (22) des geregelten Thermostaten, den Wärmeaustausch zwischen dem Gehäuse (22) des geregelten Thermostaten und der Kühlflüssigkeit modelliert und eine Wärmebilanz für jeden Teil des Thermostaten erstellt,
    d) Schätzung der Temperatur (TE) der in einer zweiten Leitung des Kühlsystems fließenden Kühlflüssigkeit am Eingang des Verbrennungsmotors in Abhängigkeit von der im Schritt a) gemessenen Temperatur (TS), der im Schritt b) erfassten Information (C, N) und dem im Schritt c) geschätzten Hub (L), wobei die zweite Leitung mit einem Kühler mit Zwischenschaltung des geregelten Thermostaten verbunden ist, wobei ein Lufterhitzer mit der zweiten Leitung verbunden ist,
    e) Schätzung der Temperatur (T4) der Kühlflüssigkeit am Thermostaten auf der Basis der geschätzten Temperatur (TE) in der zweiten Leitung, wobei die Temperatur (T4) am Thermostaten auf der Basis der geschätzten Temperatur (TE) in der zweiten Leitung durch Korrektur mittels wenigstens eines Koeffizienten erhalten wird, der in Abhängigkeit von einer Heizleistung des Lufterhitzers bestimmt wird,
    f) Erzeugung eines Wertes einer Nutzspannung, die an den geregelten Thermostaten (4) anzulegen ist, in Abhängigkeit von einem Temperatursollwert (Tc), von der im Schritt a) gemessenen Temperatur (TS) und von dem im Schritt c) geschätzten Hub (L), g) Anlegen der Nutzspannung (Vc) an den geregelten Thermostaten (4).
EP14827828.6A 2014-01-15 2014-12-12 Verfahren zum steuern eines beheizbaren thermostatventils Active EP3094842B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1450322A FR3016400B1 (fr) 2014-01-15 2014-01-15 Procede d'estimation d'une temperature de liquide de refroidissement et systeme de refroidissement d'un moteur d'entrainement de vehicule automobile
PCT/FR2014/053315 WO2015107278A1 (fr) 2014-01-15 2014-12-12 Procédé d'estimation d'une température de liquide de refroidissement et système de refroidissement d'un moteur d'entrainement de véhicule automobile

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EP3094842A1 EP3094842A1 (de) 2016-11-23
EP3094842B1 true EP3094842B1 (de) 2021-02-03

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JP (1) JP6552508B2 (de)
FR (1) FR3016400B1 (de)
WO (1) WO2015107278A1 (de)

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE10318355A1 (de) * 2003-04-23 2004-12-02 Adam Opel Ag Kühlsystem für einen Verbrennungsmotor und Steuerverfahren dafür

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JP2000220454A (ja) * 1999-01-27 2000-08-08 Unisia Jecs Corp エンジンの冷却ファン制御装置
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JP6552508B2 (ja) 2019-07-31
FR3016400A1 (fr) 2015-07-17
JP2017503112A (ja) 2017-01-26
EP3094842A1 (de) 2016-11-23
WO2015107278A1 (fr) 2015-07-23
FR3016400B1 (fr) 2016-02-05

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