EP3685024A1 - Procede de pilotage d'un moteur thermique - Google Patents
Procede de pilotage d'un moteur thermiqueInfo
- Publication number
- EP3685024A1 EP3685024A1 EP18778544.9A EP18778544A EP3685024A1 EP 3685024 A1 EP3685024 A1 EP 3685024A1 EP 18778544 A EP18778544 A EP 18778544A EP 3685024 A1 EP3685024 A1 EP 3685024A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- particulate filter
- engine
- heat engine
- threshold
- particles
- 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.)
- Withdrawn
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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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
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/007—Electric control of rotation speed controlling fuel supply
- F02D31/009—Electric control of rotation speed controlling fuel supply for maximum speed control
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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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
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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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—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 exhaust temperatures
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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
- F02D41/1444—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
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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
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0412—Methods of control or diagnosing using pre-calibrated maps, tables or charts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0418—Methods of control or diagnosing using integration or an accumulated value within an elapsed period
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/10—Parameters used for exhaust control or diagnosing said parameters being related to the vehicle or its components
- F01N2900/102—Travelling distance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1402—Exhaust gas composition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1404—Exhaust gas temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1606—Particle filter loading or soot amount
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0237—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles for regenerating ex situ
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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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D2041/0265—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to decrease temperature of the exhaust gas treating apparatus
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0802—Temperature of the exhaust gas treatment apparatus
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0812—Particle filter loading
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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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the invention relates to a method for controlling a heat engine.
- the invention lies in the field of the depollution of the exhaust gas of a heat engine.
- pollutants can be emitted in the exhaust line of the engine.
- pollutants are mainly unburned hydrocarbons (HC), nitrogen oxides (nitrogen monoxide NO and NO2), carbon oxides (including carbon monoxide CO), and particulates by mass and number. .
- the exhaust line of an engine is therefore generally at least provided with an oxidation catalyst, for example a three-way catalyst, allowing the reduction of nitrogen oxides to nitrogen and carbon dioxide, the oxidation of the oxides. carbon monoxides to carbon dioxide, and the oxidation of unburned hydrocarbons to carbon dioxide and water.
- an oxidation catalyst for example a three-way catalyst
- Solid or liquid particles consisting essentially of carbon-based soot and / or oil droplets may also be emitted. These particles typically have a size between a few nanometers and a micrometer.
- a particulate filter consisting of a mineral matrix, of ceramic type, of cellular structure, defining channels arranged substantially parallel to the general direction of flow of the exhaust gases in the filter, and alternatively closed at the inlet side of the filter gases and at the outlet side of the filter gases, as described in EP2426326.
- the particulate filter requires regular regeneration to not be overloaded. These regenerations take place in the presence of thermal and oxygen. For a gasoline engine, a large area of engine operation provides the necessary thermal. Oxygen can be provided by injection cuts during a release of the accelerator or during shifts. In order to carry out the regenerations, the temperature of the exhaust gas at the inlet of the particulate filter is at least 550 ° C. and the oxygen level at the inlet of the particulate filter is at least 2%. However, there may be situations for which the conditions are not met for long enough during a taxi (regeneration time too low, too low temperature or not enough oxygen exhaust). If these situations are prolonged or repeated successively for too long, then the particulate filter can store a large amount of particles that can damage the engine in case of regeneration.
- the invention aims to effectively remedy this disadvantage by proposing a method for controlling a heat engine, particularly a motor vehicle, connected to an exhaust line comprising a particle filter, characterized in that it comprises: a step of measuring a quantity of particles accumulated in the particulate filter in the case where driving conditions of the motor vehicle are combined to carry out such a measurement,
- the method comprises a step of activating at least one mode of reconfiguration of the thermal engine aimed at preventing any regeneration of the particulate filter.
- a reconfiguration mode of the heat engine consists of:
- the inhibition of injection cuts is performed so as to prohibit unsafe injection cuts to avoid excess oxygen to the exhaust to initiate the regeneration of the filter to particles, that is to say that it is thus possible to prevent the oxygen content at the inlet of the particulate filter from reaching a threshold value of the order of 2%.
- fuel is continued to be injected so as to minimize the amount of oxygen that can enter the particulate filter and lower a temperature of the fuel. exhaust gas at the inlet of the particulate filter.
- the limitation of the performance of the engine is performed so as to limit a load of the engine according to a regime. This limits the operating ranges in which the temperature of the exhaust gas would be too high and could initiate a natural regeneration, especially when the temperature of the exhaust gas exceeds a value of the order of 550 ° C.
- a calibration of the maximum permissible load as a function of the speed is performed as a function of the temperature of the gases upstream of the particulate filter so as to limit a temperature of the exhaust gas upstream of the filter. particle at a threshold temperature, for example of the order of 450 ° C.
- the operation of a rich air / fuel mixture is to apply a rich air / fuel mixture greater than 1, so as to limit an amount of oxygen entering the particulate filter.
- the measurement of the amount of accumulated particles is performed from a measurement of a pressure variation between an inlet and an outlet of the particulate filter.
- the invention also relates to an engine computer having a memory storing software instructions for the implementation of the control method of the engine as previously defined.
- the invention also relates to a heat engine comprising a motor computer as previously defined.
- Figure 1 is a schematic representation of a heat engine with which is implemented the control method according to the present invention
- Figure 2 is a diagram of the steps of the driving method of the heat engine according to the present invention
- Figure 3 is a graphical representation illustrating the motor torque limitation principle as a function of the engine speed and the temperature of the exhaust gas upstream of the particle filter of the present invention.
- FIG. 1 shows a heat engine 10, for example a gasoline engine, in particular for equipping a motor vehicle.
- the heat engine 10 is connected to an exhaust line 12 for evacuation of the burnt gases produced by the operation of the heat engine 10.
- the exhaust line 12 comprises a member 14 of pollutant gaseous pollutant, for example an oxidation catalyst, or a three-way catalyst.
- the three-way catalyst makes it possible in particular to reduce nitrogen oxides to nitrogen and carbon dioxide, to oxidize carbon monoxides to carbon dioxide, and unburnt hydrocarbons to carbon dioxide and water.
- the exhaust line 12 comprises a particulate filter 16 for filtering soot particles in the exhaust gas of the engine 10.
- the particulate filter 16 is adapted to the filtration of soot particles from the combustion gasoline (corresponding in English to a "gasoline particulate filter” abbreviated GPF), which differs from conventional particulate filters ensuring filtration of soot particles from the combustion of diesel.
- GPF gasoline particulate filter
- the exhaust gas passes through the material of the particle filter 16.
- each of these channels comprises a plugged end, so that the exhaust gases flowing in the particulate filter 16 pass channel channels, passing through the walls of the different channels of the particulate filter 16 to exit the particulate filter 16.
- the particulate filter 16 may be based on a porous ceramic matrix, for example made of cordierite, mullite, aluminum titanate or silicon carbide. If necessary, the depollution member 14 and the particulate filter 16 may be implanted within the same envelope.
- the exhaust line 12 is also provided with two sensors 18, 19 for pressure measurement.
- One of the sensors 18 is disposed upstream of the particulate filter 16 and the other sensor 19 is disposed downstream of the particulate filter 16.
- the pressure measuring sensors 18, 19 make it possible to measure a pressure difference between an inlet and a output of the particulate filter 16 from which it is possible to deduce a quantity of accumulated particles.
- mapping is used which establishes a correlation, as a function of the intake air flow rate, between the measurement of pressure variation and the mass of particles in the particulate filter 16.
- a computer 22 is also provided to control the operation of the engine 10.
- This calculator22 comprises a memory storing software instructions for the implementation of the method detailed below.
- a step 101 it measures a quantity of particles accumulated in the particulate filter 16, in the case where driving conditions of the motor vehicle are met to perform such a measurement.
- the amount of accumulated particles is measured from the measurement of pressure variation between the inlet and the outlet of the particulate filter 16 made by the pressure sensors 18, 19.
- a so-called critical customer information is generated in a step 102. It is considered that the rolling conditions are met to allow the measurement of the amount of particles accumulated when the flow rate of the exhaust gas exceeds a predetermined threshold, and that the rolling conditions are no longer met to allow the measurement of the quantity accumulated particles when the volume flow rate of the exhaust gas falls below the predetermined threshold.
- This predetermined threshold is for example between 0.010 m 3 / s and 0.020 m 3 / s, and is preferably 0.015 m 3 / s.
- the method comprises a step 103 of activating at least one mode of reconfiguration of the heat engine 10 to prevent regeneration of the particulate filter 16.
- the critical threshold of amount of accumulated particles is between 12 and 20 grams, and is preferably 15 grams.
- the threshold of critical driving distance is between 500 km and 2000 km, and the threshold of critical duration is between 4 hours and 15 hours, and is preferably 8 hours.
- a mode of reconfiguration of the engine 10 is to inhibit injection cuts, or limit the performance of the engine 10, or operate a rich air / fuel mixture.
- Inhibition of injection cuts is performed so as to prohibit unsafe injection cuts to avoid having an excess of oxygen in the exhaust to initiate regeneration that is to say say that it is thus avoided that the oxygen input rate of the particulate filter 16 reaches a threshold value of the order of 2%.
- fuel is still injected so as to minimize the amount of oxygen that can enter the particulate filter 16 and lower the temperature. exhaust gas at the inlet of the particulate filter 16.
- the limitation of the performance of the engine 10 is implemented so as to limit a load of the engine 10 according to a regime. This limits the operating ranges in which the temperature of the exhaust gas would be too high and could initiate a natural regeneration, especially when the temperature of the exhaust gas exceeds a value of the order of 550 ° C.
- a calibration of the maximum permissible load as a function of the speed is performed as a function of the temperature of the gases upstream of the particulate filter 16 so as to limit a temperature of the exhaust gases upstream of the particulate filter 16 to a threshold temperature, for example of the order of 450 ° C.
- the zone Z1 of the field engine for which the temperature T of the exhaust gas is less than 450 ° C is allowed in the event of a performance limitation, while the engine 10 will not be allowed to operate in the zone Z2 engine field for which the temperature T of exhaust gas is greater than 450 ° C.
- a gasoline engine operates stoichiometry, that is to say, a quantity of fuel adapted to the amount of air entering the engine to have a wealth of air / fuel mixture oscillating around 1.
- the setting can be modified by applying a richness greater than 1, that is to say a more fuel than stoichiometry.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1758654A FR3071274B1 (fr) | 2017-09-19 | 2017-09-19 | Procede de pilotage d'un moteur thermique |
PCT/FR2018/052162 WO2019058043A1 (fr) | 2017-09-19 | 2018-09-05 | Procede de pilotage d'un moteur thermique |
Publications (1)
Publication Number | Publication Date |
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EP3685024A1 true EP3685024A1 (fr) | 2020-07-29 |
Family
ID=60138608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18778544.9A Withdrawn EP3685024A1 (fr) | 2017-09-19 | 2018-09-05 | Procede de pilotage d'un moteur thermique |
Country Status (5)
Country | Link |
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EP (1) | EP3685024A1 (fr) |
CN (1) | CN111094709A (fr) |
FR (1) | FR3071274B1 (fr) |
MA (1) | MA50165A (fr) |
WO (1) | WO2019058043A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3099524B1 (fr) | 2019-07-30 | 2021-07-16 | Psa Automobiles Sa | Procede de controle de la charge du filtre a particules des vehicules automobiles |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7275365B2 (en) * | 2004-11-05 | 2007-10-02 | Southwest Research Institute | Method for controlling temperature in a diesel particulate filter during regeneration |
FR2928967B1 (fr) * | 2008-03-20 | 2010-04-02 | Renault Sas | Regeneration sans surchauffe d'un dispositif de post-traitement de vehicule automobile |
US8443591B2 (en) * | 2009-11-10 | 2013-05-21 | GM Global Technology Operations LLC | Exhaust gas oxygen concentration control system and method |
FR2958969B1 (fr) * | 2010-04-14 | 2012-05-25 | Peugeot Citroen Automobiles Sa | Procede de regeneration d'un filtre a particules |
US20120023903A1 (en) * | 2010-07-28 | 2012-02-02 | Gm Global Technology Opoerations, Inc. | Apparatus and method for monitoring regeneration frequency of a vehicle particulate filter |
FR2964413B1 (fr) * | 2010-09-02 | 2016-07-01 | Peugeot Citroen Automobiles Sa | Filtre a particules a trois revetements catalytiques |
EP2803830B1 (fr) * | 2012-01-13 | 2017-09-27 | Hitachi Construction Machinery Tierra Co., Ltd. | Machine de construction |
EP2963271B1 (fr) * | 2014-06-18 | 2017-01-11 | Fiat Group Automobiles S.p.A. | Système et procédé pour estimer la quantité de particules accumulées dans le filtre à particules d'un moteur diesel |
US10487715B2 (en) * | 2015-08-20 | 2019-11-26 | Ford Global Technologies, Llc | Regeneration of particulate filters in autonomously controllable vehicles |
-
2017
- 2017-09-19 FR FR1758654A patent/FR3071274B1/fr active Active
-
2018
- 2018-09-05 CN CN201880059851.XA patent/CN111094709A/zh active Pending
- 2018-09-05 WO PCT/FR2018/052162 patent/WO2019058043A1/fr unknown
- 2018-09-05 MA MA050165A patent/MA50165A/fr unknown
- 2018-09-05 EP EP18778544.9A patent/EP3685024A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
MA50165A (fr) | 2020-07-29 |
FR3071274B1 (fr) | 2020-08-21 |
FR3071274A1 (fr) | 2019-03-22 |
CN111094709A (zh) | 2020-05-01 |
WO2019058043A1 (fr) | 2019-03-28 |
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