EP3181876A1 - Control of a gas or particulate sensor of an internal combustion engine - Google Patents
Control of a gas or particulate sensor of an internal combustion engine Download PDFInfo
- Publication number
- EP3181876A1 EP3181876A1 EP16203246.0A EP16203246A EP3181876A1 EP 3181876 A1 EP3181876 A1 EP 3181876A1 EP 16203246 A EP16203246 A EP 16203246A EP 3181876 A1 EP3181876 A1 EP 3181876A1
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- EP
- European Patent Office
- Prior art keywords
- sensor
- engine
- temperature
- ambient air
- tdc
- 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.)
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 18
- 239000012080 ambient air Substances 0.000 claims abstract description 66
- 239000002826 coolant Substances 0.000 claims abstract description 37
- 239000003570 air Substances 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 230000004913 activation Effects 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 23
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 2
- 238000012360 testing method Methods 0.000 description 9
- 229910002089 NOx Inorganic materials 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- JCXJVPUVTGWSNB-UHFFFAOYSA-N Nitrogen dioxide Chemical compound O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000013507 mapping Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011278 co-treatment Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1494—Control of sensor heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2432—Methods of calibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/021—Engine temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0418—Air humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1466—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a soot concentration or content
Definitions
- the invention relates to a method and a system for controlling a gas or particle sensor of an internal combustion engine, the system and the method making it possible in particular to control the activation of a heating device associated with a sensor. .
- the internal combustion engines are equipped with a number of sensors that make it possible to adjust the operation of the engine and / or the exhaust gas treatment systems.
- the sensors that are generally used are gas sensors, which make it possible, for example, to detect di-oxygen (O 2 ), nitrogen oxides (NO x ), or both, and particle sensors.
- These sensors include heating devices enabling them to reach a predetermined temperature beyond which the sensitive element of the sensor is able to make measurements. Depending on the sensors, this temperature can be 450 to 800 ° C, however, during heating, in case of contact with water, a thermal shock can occur and cause cracking of the sensitive element making the sensor unusable. In order to ensure the reliability of the component, the heating of the sensor must thus be activated in the absence of any risk of projection of condensed water at the sensor.
- US9097194 discloses an estimate of the condensed water mass from the exhaust gas temperature, the gas flow rate and the exhaust descent temperature. A water mass variation is based on the heat continuously received by the condensed water. It is also an iterative estimate, with the same disadvantages as before.
- a number of points is associated high dead for which the sensor temperature is greater than or equal to the dew point.
- the heating device is not supplied with electric current when the engine is started and as long as the number of target high dead spots is not reached.
- the activation of the heating device of a sensor is decided using only one estimated parameter, the number of high dead points target, which allows to reduce the time of provision of the sensor.
- the fact that the number of top dead centers is associated with the hygrometry, the ambient air temperature and the engine coolant temperature, and corresponds to a dew point temperature of the sensor makes it possible to 'get a relatively accurate result. This is all the more precise since the estimate does not include iterative calculations.
- the use of a top dead center count reduces the time of provision of the sensor when the engine speed is high. On the other hand, the sensor's delivery time will be lower at low speed, while the evaporation of the water vapor will be slower.
- the reliability of the sensor can be improved and the risk of control of the heater in the presence of reduced water.
- the power supply of the sensor heater is maintained as long as the motor is on.
- the heater is supplied with current from the moment when the number of target high dead spots is reached and as long as the engine is on.
- the values received are obtained by means of appropriate sensors arranged to detect the ambient air temperature, the engine coolant temperature and the ambient air humidity.
- the value of the number of top dead spots received may come from a high number of dead centers counter, by decrementing or incrementing.
- the invention can of course be applied to a diesel engine or a gasoline engine.
- maps may be provided making it possible to associate, for each sensor, a number of target high dead spots with a set of engine coolant temperature values, ambient air temperature and ambient air hygrometry. number of top dead spots corresponding to a dew point of the sensor. For example, it is possible to provide a three-dimensional cartography, or even more dimensions.
- the invention is obviously not limited by the use of a map.
- This method of configuring a control system can be performed prior to the marketing of a vehicle model, for example by bench tests of the combustion engine concerned.
- the monitoring of the evolution of the temperature of the sensor can be achieved by means of a skin thermocouple, arranged on the sensitive element of the sensor, which makes it possible to improve the precision of determination of the dew point.
- the attainment of the dew point can also be checked visually from time to time, for example by means of an endoscope introduced into the pipe in which the sensor to be controlled is placed, close to the latter.
- a series of tests may be performed by varying the following parameters: ambient air temperature (T_amb), engine coolant temperature (T_engine), ambient air humidity (H_amb ).
- Steps (i) - (iv) can be repeated over all ranges of engine coolant temperature, ambient air temperature and ambient air hygrometry usually encountered during operation of an internal combustion engine .
- the configuration method may comprise a step of accumulating water at the sensor obtained by performing short cycles of start-stop of the internal combustion engine. The tests are thus carried out in a worst-case situation, thus further reducing the risks of heating the sensor in the presence of water.
- This control system may for example include or be integrated in a processor, for example a micro controller, a micro processor or other.
- the receiving means may for example comprise an input pin, an input port, or the like.
- the processing means may for example comprise a processor core or CPU (of the "Central Processing Unit") or other.
- the transmission means may for example comprise an output pin, an output port or the like.
- a motor vehicle comprising a control system as described above and / or a motor system as described above.
- Computer program products are further provided comprising instructions for performing the steps of the methods described above when executed by a processor. These computer programs can for example be read on a memory medium, downloaded or otherwise.
- the figure 1 schematically represents an internal combustion engine 1, here a four-cylinder diesel engine 2, equipped with an air intake circuit 3 and an exhaust circuit 4.
- the air intake circuit 3 comprises in particular an air filter 5 and an intake valve 6.
- the gas exhaust system 4 comprises a HC / CO treatment system 7, generally present on diesel engines and comprising an oxidation catalyst (DOC) (acronym for Diesel Oxidation Catalyst) promoting the conversion of nitric oxide to nitrogen dioxide.
- DOC oxidation catalyst
- the gas exhaust system 4 also comprises a system for treating nitrogen oxides and particles 8, the latter generally comprising a particulate filter and a catalyst for selective reduction of nitrogen oxides, also known as SCR catalyst ( of acronym for Selective Catalytic Reduction).
- Exhaust gas recirculation lines 9 and 10 are further shown, the flow rates in these lines being controlled by valves 11 and 12 respectively.
- the recirculation line 10, called low pressure generally comprises a filter 13 and a cooling device 14.
- a turbocharger 15 compresses the air entering the engine by using the flow of exhaust gas in the exhaust pipe 4.
- the engine as well as the various processing systems are controlled by a management system 17, generally called engine control unit (ECU), for example a processor.
- This management system 17 is in communication with different sensors, with the flow control valves and with the treatment systems 7, 8.
- each sensor comprises an integrated heating device 21 ', 22', 23 ', 24', respectively, controlled by a control system 30, for example a processor.
- the latter can be part of the management system 17.
- the control system 30 is in communication with one or more dead point number counters 26 to receive a value of number of TDC_CTR high dead points passed since the start of the counter.
- This counter 26 may, for example, be decremented or incremented at each top dead center (at each 1 ⁇ 2 engine revolution for a 4-cylinder engine).
- the temperature values T_amb, T_engine, and hygrometry H_amb are measured and transmitted to the control system 30 (S1). The latter then determines, for each sensor to be controlled, a number of high dead points target to reach (TDC_CTR_target) associated with these values (T_amb, T_engine, H_amb) received (S2).
- TDC_TCR is then initialized to a value TDC_CTR_init and the counter is started (S3).
- TDC_CTR absolute value of the difference between the number of top dead centers passed (TDC_CTR) and the number of initial top dead centers
- TDC_CTR_target the control system 30 then generates an activation signal (ACTIVATION_sensor) of the heater of the sensor concerned (S5).
- the counter is then decremented at each high dead point passed until reaching the zero value (S4).
- the control system 30 then generates an activation signal (ACTIVATION_sensor) of the heater of the sensor concerned (S5).
- This embodiment requires a counter 26 associated with each sensor to be controlled.
- the counter 26 may operate incrementally.
- the value of the number of high dead spots of counter 26, TDC_TCR_init is then equal to zero when the counter is started.
- the counter is then incremented at each top dead center.
- the control system 30 then generates an activation signal ACTIVATION_sensor of the heating device of the sensor concerned. This makes it possible to use only one counter 26 to control different sensors.
- the number of target TDC_CTR_target high dead spots for each sensor to be controlled can be determined by using a mapping specific to the sensor concerned, for example previously established by engine tests on a bench, and used to configure the control system 30.
- mapping can be done in the following manner.
- a skin thermocouple advantageously disposed near the sensor, on the wall of the conduit accommodating the sensor, transmits a value T_sensor to the control system 30.
- the values T_amb, T_engine, H_amb, as well as the value TDC- Counter CTR 26 are also transmitted to the control system 30.
- water Prior to measurements, water can be accumulated at the sensor at the sensor by performing short engine start-stop cycles. It is thus possible to implement the loop (B) comprising engine start (Engine_start), idle or accelerated and engine stop (Engine_stop).
- the motor stops before the temperature of the sensor T_sensor reaches the dew point.
- the motor can be stopped when the temperature of the sensor T_sensor reaches 55 ° C, preferably 50 ° C.
- the loop (B) can be repeated several times provided that the temperature of the sensor T_sensor remains lower than the dew point temperature. This makes it possible to accumulate as much water as possible in the vicinity of the sensor before the test.
- H_amb The hygrometry of the ambient air, H_amb, can be constant during the test. We will then perform tests at different values of H_amb, for example at 40%, 50%, 60%, 70%, 80%. Higher or lower humidity values can be extrapolated.
- the counter is then started and the evolution of the sensor temperature (T_sensor), the air temperature (T_amb) and the engine coolant temperature (T_engine) are followed (C2).
- TDC_CTR TDC_CTR_target
- C3 the control system (30). air and engine coolant temperature.
- the engine is then stopped (Engine_stop) and cooled (C4) before the next test.
- the test is repeated by varying the temperatures of the ambient air and the engine coolant over the operating temperature ranges.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Commande d'un capteur disposé dans une conduite d'admission d'air ou d'échappement des gaz d'un moteur à combustion interne, pour commander l'activation d'un chauffage associé au capteur, avec les étapes suivantes, au démarrage du moteur : - recevoir (S1) des valeurs : - (T_amb) de température d'air ambiant, - (T_engine) de température d'un liquide de refroidissement, - (H_amb) d'hygrométrie d'air ambiant, - (TDC_CTR) de nombre de points morts hauts, - déterminer (S2) un nombre de points morts hauts cible (TDC_CTR_target) en fonction des valeurs (T_amb, T_engine, H_amb) et pour lequel la température du capteur est supérieure ou égale au point de rosée, - alimenter (S5) le dispositif de chauffage du capteur en courant électrique lorsque, la valeur de nombre de points morts hauts reçue depuis le démarrage du moteur (TDC_CTR) est égale au nombre de points morts hauts cible (TDC_CTR_target).Control of a sensor disposed in an air intake or exhaust gas duct of an internal combustion engine, for controlling the activation of a heater associated with the sensor, with the following steps, at the start of the engine: - receive (S1) values: - (T_amb) ambient air temperature, - (T_engine) temperature of a coolant, - (H_amb) of ambient air hygrometry, - (TDC_CTR) number of high dead spots, determining (S2) a number of target high dead points (TDC_CTR_target) as a function of the values (T_amb, T_engine, H_amb) and for which the temperature of the sensor is greater than or equal to the dew point, - Supply (S5) the heating device of the electric current sensor when the number of high dead spots received since the start of the engine (TDC_CTR) is equal to the number of TDC_CTR_target (TDC_CTR_target).
Description
L'invention concerne un procédé et un système de commande d'un capteur de gaz ou de particules d'un moteur à combustion interne, le système et le procédé permettant notamment de commander l'activation d'un dispositif de chauffage associé à un capteur.The invention relates to a method and a system for controlling a gas or particle sensor of an internal combustion engine, the system and the method making it possible in particular to control the activation of a heating device associated with a sensor. .
Les moteurs à combustion interne sont équipés d'un certain nombre de capteurs qui permettent de régler le fonctionnement du moteur et/ou des systèmes de traitement des gaz d'échappement. Les capteurs généralement utilisés sont des capteurs de gaz, permettant par exemple de détecter le di-oxygène (O2), les oxydes d'azote (NOx), ou les deux, et des capteurs de particules.The internal combustion engines are equipped with a number of sensors that make it possible to adjust the operation of the engine and / or the exhaust gas treatment systems. The sensors that are generally used are gas sensors, which make it possible, for example, to detect di-oxygen (O 2 ), nitrogen oxides (NO x ), or both, and particle sensors.
Un moteur à combustion interne peut ainsi être comprendre :
- un capteur de O2 à l'admission,
- un capteur de NOx et éventuellement de O2, disposé dans la ligne d'échappement en aval ou en amont de systèmes de traitement des gaz d'échappement,
- un capteur de particules, également disposé dans la ligne d'échappement en aval des systèmes de traitement.
- an O 2 sensor at the intake,
- an NO x sensor and possibly O 2 , disposed in the exhaust line downstream or upstream of exhaust gas treatment systems,
- a particle sensor, also disposed in the exhaust line downstream of the treatment systems.
Ces capteurs comportent des dispositifs de chauffage leur permettant d'atteindre une température prédéterminée au-delà de laquelle l'élément sensible du capteur est en état de faire des mesures. En fonction des capteurs, cette température peut être de 450 à 800°C, Toutefois, lors du chauffage, en cas de contact avec de l'eau, un choc thermique peut se produire et occasionner une fissuration de l'élément sensible rendant le capteur inutilisable. Afin d'assurer la fiabilité du composant, le chauffage du capteur ne doit ainsi être activé qu'en absence de risque de projection d'eau condensée au niveau du capteur.These sensors include heating devices enabling them to reach a predetermined temperature beyond which the sensitive element of the sensor is able to make measurements. Depending on the sensors, this temperature can be 450 to 800 ° C, however, during heating, in case of contact with water, a thermal shock can occur and cause cracking of the sensitive element making the sensor unusable. In order to ensure the reliability of the component, the heating of the sensor must thus be activated in the absence of any risk of projection of condensed water at the sensor.
Il existe des systèmes et procédés qui visent à activer, autrement dit chauffer, un capteur en absence d'eau au niveau du capteur. C'est le cas, par exemple, des systèmes et procédés décrits dans les documents
De manière similaire,
L'invention vise à pallier ces inconvénients en proposant un procédé de commande d'au moins un capteur disposé dans une conduite d'admission d'air ou d'échappement des gaz d'un moteur à combustion interne, le procédé comprenant les étapes suivantes, mises en oeuvre pour chaque capteur à commander au démarrage du moteur :
- recevoir :
- une valeur de température d'air ambiant,
- une valeur de température de liquide de refroidissement du moteur, correspondant à la température d'un liquide de refroidissement quittant le moteur,
- une valeur d'hygrométrie d'air ambiant,
- une valeur de nombre de points morts hauts,
- déterminer un nombre de points morts hauts cible à atteindre,
- alimenter le dispositif de chauffage du capteur en courant électrique lorsque la valeur du nombre de points morts hauts reçue depuis le démarrage du moteur est égale au nombre de points morts hauts cible.
- to receive :
- an ambient air temperature value,
- a coolant temperature value of the engine, corresponding to the temperature of a coolant leaving the engine,
- a humidity value of ambient air,
- a value of number of high dead spots,
- determine a number of target high dead spots to reach,
- supplying the heating device of the sensor with electric current when the value of the number of high dead spots received since the starting of the engine is equal to the number of target high dead spots.
Aux fins de la détermination du nombre de points morts hauts cible, à chaque ensemble de valeur de température d'air ambiant, valeur de température de liquide de refroidissement du moteur et valeur d'hygrométrie d'air ambiant, est associé un nombre de points morts hauts pour lequel la température du capteur est supérieure ou égale au point de rosée.For the purposes of determining the number of target top dead centers, for each set of ambient air temperature value, engine coolant temperature value and ambient air humidity value, a number of points is associated high dead for which the sensor temperature is greater than or equal to the dew point.
Ainsi, le dispositif de chauffage n'est pas alimenté en courant électrique au démarrage du moteur et tant que le nombre de points morts hauts cible n'est pas atteint.Thus, the heating device is not supplied with electric current when the engine is started and as long as the number of target high dead spots is not reached.
Ainsi, l'activation du dispositif de chauffage d'un capteur est décidée en n'utilisant qu'un seul paramètre estimé, le nombre de points morts hauts cible, ce qui permet réduire le temps de mise à disposition du capteur. En outre, le fait que le nombre de points morts hauts soit associé à l'hygrométrie, à la température de l'air ambiant et à la température de liquide de refroidissement du moteur, et corresponde à une température de rosée du capteur, permet d'obtenir un résultat relativement précis. Résultat d'autant plus précis que l'estimation ne comprend pas de calculs itératifs. Par ailleurs, l'utilisation d'un comptage de points morts hauts réduit le temps de mise à disposition du capteur lorsque le régime du moteur est élevé. A contrario, le temps de mise à disposition du capteur sera plus faible à bas régime, alors que l'évaporation de la vapeur d'eau sera plus lente.Thus, the activation of the heating device of a sensor is decided using only one estimated parameter, the number of high dead points target, which allows to reduce the time of provision of the sensor. In addition, the fact that the number of top dead centers is associated with the hygrometry, the ambient air temperature and the engine coolant temperature, and corresponds to a dew point temperature of the sensor, makes it possible to 'get a relatively accurate result. This is all the more precise since the estimate does not include iterative calculations. In addition, the use of a top dead center count reduces the time of provision of the sensor when the engine speed is high. On the other hand, the sensor's delivery time will be lower at low speed, while the evaporation of the water vapor will be slower.
De manière générale, la fiabilité du capteur peut ainsi être améliorée et les risques de commande du dispositif de chauffage en présence d'eau réduits.In general, the reliability of the sensor can be improved and the risk of control of the heater in the presence of reduced water.
Avantageusement, l'alimentation en courant électrique du dispositif de chauffage du capteur est maintenue tant que le moteur est allumé. Autrement dit, le dispositif de chauffage est alimenté en courant à partir de l'instant où le nombre de points morts hauts cible est atteint et tant que le moteur est allumé.Advantageously, the power supply of the sensor heater is maintained as long as the motor is on. In other words, the heater is supplied with current from the moment when the number of target high dead spots is reached and as long as the engine is on.
Les valeurs reçues sont obtenues au moyen de capteurs appropriés disposés afin de détecter la température d'air ambiant, la température du liquide de refroidissement du moteur et l'hygrométrie d'air ambiant.The values received are obtained by means of appropriate sensors arranged to detect the ambient air temperature, the engine coolant temperature and the ambient air humidity.
La valeur de nombre de points morts hauts reçue peut provenir d'un compteur de nombre de points morts hauts, par décrémentation ou incrémentation.The value of the number of top dead spots received may come from a high number of dead centers counter, by decrementing or incrementing.
L'invention peut bien entendu être appliquée à un moteur Diesel ou à un moteur à essence.The invention can of course be applied to a diesel engine or a gasoline engine.
On pourra par exemple prévoir des cartographies permettant d'associer, pour chaque capteur, un nombre de points morts hauts cible à un ensemble de valeurs de température de liquide de refroidissement du moteur, température d'air ambiant et hygrométrie d'air ambiant, ce nombre de points morts hauts correspondant à un point de rosée du capteur. On pourra par exemple prévoir une cartographie tridimensionnelle, ou bien à davantage encore de dimensions.For example, maps may be provided making it possible to associate, for each sensor, a number of target high dead spots with a set of engine coolant temperature values, ambient air temperature and ambient air hygrometry. number of top dead spots corresponding to a dew point of the sensor. For example, it is possible to provide a three-dimensional cartography, or even more dimensions.
L'invention n'est évidemment pas limitée par l'utilisation d'une cartographie. On pourra par exemple prévoir de modéliser une relation entre nombre de points morts hauts et les températures de liquide de refroidissement du moteur et d'air ambiant par une fonction pour chaque valeur d'hygrométrie de l'air ambiant.The invention is obviously not limited by the use of a map. For example, it is possible to model a relationship between the number of top dead centers and the engine coolant and ambient air temperatures by a function for each humidity value of the ambient air.
Il est en outre proposé un procédé de configuration d'un système de commande de l'activation d'au moins un dispositif de chauffage associé à un capteur de moteur d'un véhicule automobile, ce véhicule automobile étant équipé d'un moteur, d'un capteur à commander et d'un capteur de température d'air ambiant, d'un capteur de température de liquide de refroidissement du moteur qui détecte une température de liquide de refroidissement quittant le moteur, d'un capteur hygrométrique qui détecte l'hygrométrie d'air ambiant et d'un compteur qui détecte le nombre de points morts hauts écoulés. Ce procédé comprend :
- à partir du démarrage du moteur, suivre l'évolution de la température du capteur à activer en fonction du nombre de points morts hauts, de l'hygrométrie de l'air ambiant, de la température d'air ambiant et de la température de liquide de refroidissement du moteur,
- lorsque la température du capteur atteint le point de rosée, enregistrer le nombre de points morts hauts et les valeurs de la température d'air ambiant, de la température de liquide de refroidissement du moteur et de l'hygrométrie d'air ambiant.
- from the starting of the engine, follow the evolution of the temperature of the sensor to be activated according to the number of top dead centers, the hygrometry of the ambient air, the ambient air temperature and the liquid temperature engine cooling,
- When the sensor temperature reaches the dew point, record the number of top dead centers and the ambient air temperature, engine coolant temperature, and ambient air humidity values.
Ce procédé de configuration d'un système de commande peut être effectué préalablement à la commercialisation d'un modèle de véhicule, par exemple par des essais en banc du moteur à combustion concerné.This method of configuring a control system can be performed prior to the marketing of a vehicle model, for example by bench tests of the combustion engine concerned.
Avantageusement, le suivi de l'évolution de la température du capteur peut être réalisé au moyen d'un thermocouple de peau, disposé sur l'élément sensible du capteur, ce qui permet d'améliorer la précision de détermination du point de rosée. L'atteinte du point de rosée peut en outre être vérifiée visuellement de temps en temps, par exemple au moyen d'un endoscope introduit dans la conduite dans laquelle est disposé le capteur à commander, à proximité de celui-ci.Advantageously, the monitoring of the evolution of the temperature of the sensor can be achieved by means of a skin thermocouple, arranged on the sensitive element of the sensor, which makes it possible to improve the precision of determination of the dew point. The attainment of the dew point can also be checked visually from time to time, for example by means of an endoscope introduced into the pipe in which the sensor to be controlled is placed, close to the latter.
A titre d'exemple, une succession d'essais peut être réalisée en faisant varier les paramètres suivants : température de l'air ambiant (T_amb), température de liquide de refroidissement du moteur (T_engine), hygrométrie de l'air ambiant (H_amb).By way of example, a series of tests may be performed by varying the following parameters: ambient air temperature (T_amb), engine coolant temperature (T_engine), ambient air humidity (H_amb ).
Avantageusement, le procédé de configuration peut ainsi comprendre :
- pour une valeur prédéterminée de l'hygrométrie de l'air ambiant et/ou une valeur prédéterminée de la température de l'air ambiant :
- (i) démarrer le moteur,
- (ii) compter le nombre de points morts hauts depuis le démarrage du moteur,
- (iii) suivre l'évolution de la température du capteur, de la température de liquide de refroidissement du moteur, et, le cas échéant, de la température de l'air ambiant ou de l'hygrométrie de l'air ambiant,
- (iv) lorsque la température du capteur atteint le point de rosée, enregistrer le nombre de points morts hauts, la valeur de la température de liquide de refroidissement du moteur, la valeur de l'hygrométrie de l'air ambiant et la valeur de la température de l'air ambiant,
- réitérer les étapes (i)-(iv) pour d'autres valeurs prédéterminées de l'hygrométrie de l'air ambiant et/ou de la température de l'air ambiant.
- for a predetermined value of the hygrometry of the ambient air and / or a predetermined value of the ambient air temperature:
- (i) start the engine,
- (ii) count the number of top dead spots since starting the engine,
- (iii) monitor the temperature of the sensor, the engine coolant temperature, and, where applicable, the ambient air temperature or the relative humidity of the ambient air,
- (iv) when the sensor temperature reaches the dew point, record the number of top dead centers, the value of the engine coolant temperature, the ambient air humidity value and the value of the ambient air temperature,
- repeating steps (i) - (iv) for other predetermined values of the relative humidity of the ambient air and / or the ambient air temperature.
Les étapes (i)-(iv) pourront être réitérées sur toutes les plages des valeurs de température de liquide de refroidissement du moteur, température d'air ambiant et hygrométries d'air ambiant habituellement rencontrées lors du fonctionnement d'un moteur à combustion interne.Steps (i) - (iv) can be repeated over all ranges of engine coolant temperature, ambient air temperature and ambient air hygrometry usually encountered during operation of an internal combustion engine .
Avantageusement, préalablement au démarrage du moteur et au suivi de l'évolution de la température du capteur, le procédé de configuration peut comprendre une étape d'accumulation d'eau au niveau du capteur obtenue en effectuant des cycles courts de démarrage-arrêt du moteur à combustion interne. Les essais sont ainsi réalisés en situation de pire cas, réduisant ainsi davantage les risques de chauffage du capteur en présence d'eau.Advantageously, prior to starting the engine and monitoring the evolution of the temperature of the sensor, the configuration method may comprise a step of accumulating water at the sensor obtained by performing short cycles of start-stop of the internal combustion engine. The tests are thus carried out in a worst-case situation, thus further reducing the risks of heating the sensor in the presence of water.
L'invention concerne également un système de commande d'au moins un capteur disposé dans une conduite d'admission d'air ou d'échappement des gaz d'un moteur à combustion interne, le système commandant, pour chaque capteur, l'activation d'un dispositif de chauffage du capteur et comprenant :
- des moyens de réception des valeurs de température d'air ambiant, de température de liquide de refroidissement du moteur, d'hygrométrie de l'air ambiant et du nombre de points morts hauts,
- des moyens de traitement conformés pour déterminer un nombre de points morts hauts cible pour que la température dudit capteur soit supérieure ou égale à un point de rosée, et optionnellement pour comparer ce nombre de points morts hauts cible à la valeur reçue de nombre de points morts hauts, le nombre de points morts hauts cible étant déterminé lorsque le moteur est démarré en fonction de :
- la valeur reçue de la température de l'air ambiant,
- la valeur reçue de la température de liquide de refroidissement du moteur,
- la valeur reçue de l'hygrométrie de l'air ambiant,
- des moyens de transmission pour envoyer au dispositif de chauffage du capteur, un message d'activation lorsque la valeur de nombre de points morts hauts reçue depuis le démarrage du moteur est égale au nombre de points morts hauts cible, le message d'activation provoquant l'alimentation du dispositif de chauffage en courant électrique.
- means for receiving ambient air temperature values, engine coolant temperature, ambient air humidity and the number of high dead spots,
- shaped processing means for determining a number of target dead centers for the temperature of said sensor to be greater than or equal to a dew point, and optionally for comparing this number of target high dead centers with the value received from the number of dead spots high, the number of target TDCs being determined when the engine is started based on:
- the value received from the ambient air temperature,
- the value received from the engine coolant temperature,
- the value received from the hygrometry of the ambient air,
- transmission means for sending to the sensor heater an activation message when the value of the number of high dead spots received since the start of the engine is equal to the number of target high dead spots, the activation message causing the supplying the heating device with electric current.
Ce système de commande peut par exemple comprendre ou être intégré dans un processeur, par exemple un micro contrôleur, un micro processeur ou autre.This control system may for example include or be integrated in a processor, for example a micro controller, a micro processor or other.
Les moyens de réception peuvent par exemple comprendre un pin d'entrée, un port d'entrée, ou autre. Les moyens de traitement peuvent par exemple comprendre un coeur de processeur ou CPU (de l'anglais « Central Processing Unit ») ou autre. Les moyens de transmission peuvent par exemple comprendre un pin de sortie, un port de sortie ou autre.The receiving means may for example comprise an input pin, an input port, or the like. The processing means may for example comprise a processor core or CPU (of the "Central Processing Unit") or other. The transmission means may for example comprise an output pin, an output port or the like.
Avantageusement, le procédé et le système de commande selon l'invention peuvent commander au moins un capteur choisi parmi :
- un capteur apte à détecter au moins un gaz, le gaz pouvant être choisi parmi le di-oxygène, les oxydes d'azote,
- un capteur de particules.
- a sensor capable of detecting at least one gas, the gas possibly being chosen from di-oxygen, nitrogen oxides,
- a particle sensor.
Il est en outre proposé un système de moteur pour un véhicule automobile, comprenant le dispositif de gestion décrit ci-dessus ainsi qu'un moteur. Le moteur peut être un moteur à carburant, par exemple un moteur Diesel ou un moteur à essence. Le système comprend en outre :
- un capteur de température d'air ambiant, qui détecte une température d'air ambiant,
- un capteur de température de liquide de refroidissement du moteur, qui détecte une température de liquide de refroidissement quittant le moteur,
- un capteur hygrométrique, qui détecte l'hygrométrie de l'air ambiant,
- un compteur du nombre de points morts hauts du moteur, qui compte ou décompte le nombre de points morts hauts passés depuis le démarrage du compteur, et
- au moins un capteur commandé par le système de commande et choisi parmi :
- un capteur apte à détecter au moins un gaz, le gaz étant choisi parmi le dioxygène, les oxydes d'azote,
- un capteur de particules.
- an ambient air temperature sensor, which detects an ambient air temperature,
- an engine coolant temperature sensor, which detects a coolant temperature leaving the engine,
- a hygrometric sensor, which detects the hygrometry of the ambient air,
- a counter of the number of top dead centers of the engine, which counts or counts the number of top dead spots since the meter was started, and
- at least one sensor controlled by the control system and selected from:
- a sensor capable of detecting at least one gas, the gas being chosen from oxygen, nitrogen oxides,
- a particle sensor.
Il est en outre proposé un véhicule automobile, comprenant un système de commande tel que décrit ci-dessus et/ou un système de moteur tel que décrit ci-dessus.There is further provided a motor vehicle, comprising a control system as described above and / or a motor system as described above.
Il est en outre proposé des produits programme d'ordinateur comprenant des instructions pour effectuer les étapes des procédés décrits ci-dessus lorsqu'elles sont exécutées par un processeur. Ces programmes d'ordinateur peuvent par exemple être lus sur un support mémoire, être téléchargés ou autre.Computer program products are further provided comprising instructions for performing the steps of the methods described above when executed by a processor. These computer programs can for example be read on a memory medium, downloaded or otherwise.
L'invention est maintenant décrite en référence aux dessins annexés, non limitatifs, dans lesquels :
- la
figure 1 est une représentation schématique d'un système de moteur à combustion interne comprenant un système de commande selon un mode de réalisation de l'invention ; - la
figure 2 représente un diagramme du procédé de commande selon l'invention, - la
figure 3 représente un diagramme du procédé de configuration selon l'invention.
- the
figure 1 is a schematic representation of an internal combustion engine system comprising a control system according to an embodiment of the invention; - the
figure 2 represents a diagram of the control method according to the invention, - the
figure 3 represents a diagram of the configuration method according to the invention.
La
De manière classique, le circuit d'admission d'air 3 comprend notamment un filtre à air 5 et une vanne d'admission 6. Le circuit d'échappement des gaz 4 comprend un système de traitement 7 des HC/CO, généralement présent sur les moteurs diesel et comprenant un catalyseur d'oxydation (DOC - acronyme anglais pour : Diesel Oxidation Catalyst) favorisant la transformation du monoxyde d'azote en dioxyde d'azote. Le circuit d'échappement des gaz 4 comprend également un système de traitement des oxydes d'azote et des particules 8, ce dernier comprenant généralement un filtre à particules et un catalyseur de réduction sélective d'oxydes d'azote, dit aussi catalyseur SCR (de l'acronyme anglais pour : Selective Catalytic Reduction). Des conduites de recirculation des gaz d'échappement 9 et 10 sont en outre représentées, les débits dans ces conduites étant contrôlés par des vannes 11 et 12 respectivement. La conduite de recirculation 10, dite basse pression, comprend généralement un filtre 13 et un dispositif de refroidissement 14.In a conventional manner, the
Un turbocompresseur 15 assure la compression de l'air entrant dans le moteur en utilisant la circulation des gaz d'échappement dans la conduite d'échappement 4.A
Enfin, le moteur à combustion 1 est refroidi par un système de refroidissement 16.Finally, the
Le moteur ainsi que les divers systèmes de traitement sont commandés par un système de gestion 17, généralement appelé unité de contrôle du moteur (ECU), par exemple un processeur. Ce système de gestion 17 est en communication avec différents capteurs, avec les vannes de contrôle des débits et avec les systèmes de traitement 7, 8.The engine as well as the various processing systems are controlled by a
Pour davantage de commodité, seuls quelques capteurs sont représentés sur la
un débitmètre 18,- un capteur de température 19,
un hygromètre 20,un capteur d'O 2 21,- un capteur de NOx/
O 2 22, en amont du système de traitement 7, - un capteur de NOx/
O 2 23, en aval du système de traitement 8, - un capteur de particules 24, en aval du système de traitement 8,
- un capteur de température 25 du liquide du système de refroidissement 16 sortant du moteur.
- a
flowmeter 18, - a
temperature sensor 19, - a
hygrometer 20, - an
O 2 21 sensor, - a NOx /
O 2 22 sensor, upstream of thetreatment system 7, - a NOx /
O 2 23 sensor, downstream of thetreatment system 8, - a
particle sensor 24, downstream of thetreatment system 8, - a
temperature sensor 25 of the liquid of thecooling system 16 leaving the engine.
Les capteurs de gaz 21, 22, 23 et le capteur de particules 24 doivent être chauffés afin d'être en état de prendre des mesures. A cet effet, chaque capteur comporte un dispositif de chauffage intégré 21', 22', 23', 24', respectivement, commandés par un système de commande 30, par exemple un processeur. Ce dernier peut faire partie du système de gestion 17.The
Le système de commande 30 est en communication avec un ou plusieurs compteurs de nombre de points morts 26 pour recevoir une valeur de nombre de points morts haut TDC_CTR passés depuis le démarrage du compteur. Ce compteur 26 peut par exemple se décrémenter ou s'incrémenter à chaque point mort haut (à chaque ½ tour de moteur pour un moteur à 4 cylindres).The
Le système de commande 30 est également en communication avec :
- le capteur de température 19, pour recevoir une valeur de température d'air ambiant T_amb,
- le capteur de température 25, pour recevoir une valeur de température de liquide de refroidissement du moteur T_engine,
l'hygromètre 20 pour recevoir une valeur d'hygrométrie de l'air ambiant H_amb.
- the
temperature sensor 19, to receive an ambient air temperature value T_amb, - the
temperature sensor 25 for receiving a coolant temperature value of the engine T_engine, - the
hygrometer 20 to receive a humidity value of the ambient air H_amb.
Lorsque le moteur est démarré, les valeurs de température T_amb, T_engine, et d'hygrométrie H_amb sont mesurées et transmises au système de commande 30 (S1). Ce dernier détermine alors, pour chaque capteur à commander, un nombre de points morts hauts cible à atteindre (TDC_CTR_target) associé à ces valeurs (T_amb, T_engine, H_amb) reçues (S2).When the engine is started, the temperature values T_amb, T_engine, and hygrometry H_amb are measured and transmitted to the control system 30 (S1). The latter then determines, for each sensor to be controlled, a number of high dead points target to reach (TDC_CTR_target) associated with these values (T_amb, T_engine, H_amb) received (S2).
La valeur de nombre de points morts hauts du compteur 26, TDC_TCR est alors être initialisée à une valeur TDC_CTR_init et le compteur est démarré (S3).The value of the number of high dead spots of the
Lorsque la valeur absolue de la différence entre le nombre de points morts hauts passé (TDC_CTR) et le nombre de point morts haut initial est égale au nombre de points morts hauts cible (S4), à savoir lorsque |TDC_CTR - TDC_CTR_init| = TDC_CTR_target, le système de commande 30 génère alors un signal d'activation (ACTIVATION_sensor) du dispositif de chauffage du capteur concerné (S5).When the absolute value of the difference between the number of top dead centers passed (TDC_CTR) and the number of initial top dead centers is equal to the number of target top dead centers (S4), ie when | TDC_CTR - TDC_CTR_init | = TDC_CTR_target, the
Dans un premier mode de réalisation, pour chaque capteur à commander, la valeur d'initialisation TDC_CTR_init peut-être fixée à la valeur cible : TDC_CTR_init=TDC_CTR_target. Le compteur se décrémente alors à chaque point mort haut passé jusqu'à atteindre la valeur nulle (S4). Le système de commande 30 génère alors un signal d'activation (ACTIVATION_sensor) du dispositif de chauffage du capteur concerné (S5). Ce mode de réalisation nécessite un compteur 26 associé à chaque capteur à commander.In a first embodiment, for each sensor to be controlled, the initialization value TDC_CTR_init can be set to the target value: TDC_CTR_init = TDC_CTR_target. The counter is then decremented at each high dead point passed until reaching the zero value (S4). The
Dans un autre mode de réalisation, le compteur 26 peut fonctionner par incrémentation. La valeur de nombre de points morts hauts du compteur 26, TDC_TCR_init, est alors égale à zéro lorsque le compteur est démarré. Le compteur s'incrémente alors à chaque point mort haut passé. Lorsque la valeur TDC_TCR atteint la valeur TDC_CTR_target pour l'un des capteurs commandés, le système de commande 30 génère alors un signal d'activation ACTIVATION_sensor du dispositif de chauffage du capteur concerné. Ceci permet de n'utiliser qu'un seul compteur 26 pour commander différents capteurs.In another embodiment, the
Dès lors que le dispositif de chauffage d'un capteur a été activé par le système de commande 30, il reste activé jusqu'à l'arrêt du moteur.Once the heating device of a sensor has been activated by the
Le nombre de points morts hauts cible TDC_CTR_target pour chaque capteur à commander peut être déterminé en utilisant une cartographie spécifique au capteur concerné, par exemple préalablement établie par des essais du moteur sur un banc, et utilisée pour configurer le système de commande 30.The number of target TDC_CTR_target high dead spots for each sensor to be controlled can be determined by using a mapping specific to the sensor concerned, for example previously established by engine tests on a bench, and used to configure the
En référence à la
Préalablement aux mesures, de l'eau peut être accumulée au capteur au niveau du capteur en effectuant des cycles courts de démarrage-arrêt du moteur. On peut ainsi mettre en oeuvre la boucle (B) comprenant le démarrage du moteur (Engine_start), en régime ralenti ou accéléré puis l'arrêt du moteur (Engine_stop). De préférence, l'arrêt du moteur a lieu avant que la température du capteur T_sensor n'atteigne le point de rosée. On peut par exemple arrêter le moteur quand la température du capteur T_sensor atteint 55°C, de préférence 50°C. La boucle (B) peut être réitérée plusieurs fois pourvu que la température du capteur T_sensor reste inférieure à la température du point de rosée. Ceci permet d'accumuler le plus d'eau possible au voisinage du capteur avant l'essai.Prior to measurements, water can be accumulated at the sensor at the sensor by performing short engine start-stop cycles. It is thus possible to implement the loop (B) comprising engine start (Engine_start), idle or accelerated and engine stop (Engine_stop). Preferably, the motor stops before the temperature of the sensor T_sensor reaches the dew point. For example, the motor can be stopped when the temperature of the sensor T_sensor reaches 55 ° C, preferably 50 ° C. The loop (B) can be repeated several times provided that the temperature of the sensor T_sensor remains lower than the dew point temperature. This makes it possible to accumulate as much water as possible in the vicinity of the sensor before the test.
Les mesures peuvent ensuite être réalisées. L'hygrométrie de l'air ambiant, H_amb, peut être constante pendant l'essai. On réalisera alors des essais à différentes valeurs de H_amb, par exemple à 40%, 50%, 60%, 70%, 80%. Les valeurs d'hygrométrie plus élevées ou plus faibles pourront être extrapolées.The measurements can then be performed. The hygrometry of the ambient air, H_amb, can be constant during the test. We will then perform tests at different values of H_amb, for example at 40%, 50%, 60%, 70%, 80%. Higher or lower humidity values can be extrapolated.
A l'étape (C1), on démarre alors le moteur (Engine_start) et l'on initialise à zéro le compteur de nombre de points morts hauts (TDC_CTR_init =0). On démarre ensuite le compteur et on suit (C2) l'évolution de la température du capteur (T_sensor), de la température de l'air (T_amb) et de la température de liquide de refroidissement du moteur (T_engine). Quand la température du capteur (T_sensor) atteint le point de rosée (DEW_point), on enregistre (C3) dans le système de commande (30) le nombre de points morts hauts TDC_CTR= TDC_CTR_target, ainsi que les valeurs de la température de l'air et de la température de liquide de refroidissement du moteur. Le moteur est alors arrêté (Engine_stop) et refroidi (C4) avant l'essai suivant.In step (C1), the engine is started (Engine_start) and the counter of the number of high dead points (TDC_CTR_init = 0) is initialized to zero. The counter is then started and the evolution of the sensor temperature (T_sensor), the air temperature (T_amb) and the engine coolant temperature (T_engine) are followed (C2). When the temperature of the sensor (T_sensor) reaches the dew point (DEW_point), the number of high dead spots TDC_CTR = TDC_CTR_target and the temperature values of the control system are recorded (C3) in the control system (30). air and engine coolant temperature. The engine is then stopped (Engine_stop) and cooled (C4) before the next test.
On réitère l'essai en faisant varier les températures de l'air ambiant et du liquide de refroidissement du moteur sur les plages de températures possibles en fonctionnement.The test is repeated by varying the temperatures of the ambient air and the engine coolant over the operating temperature ranges.
Claims (8)
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FR1562734A FR3045730B1 (en) | 2015-12-18 | 2015-12-18 | METHOD AND SYSTEM FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE SENSOR. |
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EP3181876A1 true EP3181876A1 (en) | 2017-06-21 |
EP3181876B1 EP3181876B1 (en) | 2020-07-08 |
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EP16203246.0A Active EP3181876B1 (en) | 2015-12-18 | 2016-12-09 | Control of a gas or particulate sensor of an internal combustion engine |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070271904A1 (en) * | 2006-04-06 | 2007-11-29 | Denso Corporation | System for controlling exhaust gas sensor having heater |
US20080178856A1 (en) * | 2007-01-31 | 2008-07-31 | Adams Justin F | Oxygen sensor heater control methods and systems |
US20090184105A1 (en) * | 2008-01-18 | 2009-07-23 | Denso Corporation | Heater controller of exhaust gas sensor |
US8479494B2 (en) | 2008-03-13 | 2013-07-09 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas sensor control system and control method |
EP2716900A1 (en) * | 2011-06-02 | 2014-04-09 | Bosch Corporation | Heater control device for oxygen concentration sensor |
US9097194B2 (en) | 2011-07-19 | 2015-08-04 | Hitachi Automotive Systems, Ltd. | Control device controlling sensor heating in internal combustion engine |
-
2015
- 2015-12-18 FR FR1562734A patent/FR3045730B1/en not_active Expired - Fee Related
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2016
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070271904A1 (en) * | 2006-04-06 | 2007-11-29 | Denso Corporation | System for controlling exhaust gas sensor having heater |
US20080178856A1 (en) * | 2007-01-31 | 2008-07-31 | Adams Justin F | Oxygen sensor heater control methods and systems |
US20090184105A1 (en) * | 2008-01-18 | 2009-07-23 | Denso Corporation | Heater controller of exhaust gas sensor |
US8479494B2 (en) | 2008-03-13 | 2013-07-09 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas sensor control system and control method |
EP2716900A1 (en) * | 2011-06-02 | 2014-04-09 | Bosch Corporation | Heater control device for oxygen concentration sensor |
US9097194B2 (en) | 2011-07-19 | 2015-08-04 | Hitachi Automotive Systems, Ltd. | Control device controlling sensor heating in internal combustion engine |
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FR3045730B1 (en) | 2017-12-22 |
EP3181876B1 (en) | 2020-07-08 |
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