WO2001048358A2 - Procede de gestion du fonctionnement d'un filtre a particules pour moteur a combustion - Google Patents
Procede de gestion du fonctionnement d'un filtre a particules pour moteur a combustion Download PDFInfo
- Publication number
- WO2001048358A2 WO2001048358A2 PCT/FR2000/003665 FR0003665W WO0148358A2 WO 2001048358 A2 WO2001048358 A2 WO 2001048358A2 FR 0003665 W FR0003665 W FR 0003665W WO 0148358 A2 WO0148358 A2 WO 0148358A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- combustion
- filter
- taval
- management method
- regeneration
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000011069 regeneration method Methods 0.000 claims abstract description 33
- 230000008929 regeneration Effects 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims description 33
- 230000000977 initiatory effect Effects 0.000 claims description 19
- 238000007726 management method Methods 0.000 claims description 17
- 230000004913 activation Effects 0.000 claims description 13
- 238000011068 loading method Methods 0.000 claims description 7
- 230000008033 biological extinction Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 6
- 230000018109 developmental process Effects 0.000 abstract 1
- 230000001172 regenerating effect Effects 0.000 abstract 1
- 239000004071 soot Substances 0.000 description 29
- 238000010438 heat treatment Methods 0.000 description 26
- 239000000446 fuel Substances 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000015654 memory Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
-
- 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
- F01N3/025—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 using fuel burner or by adding fuel to exhaust
-
- 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
- F01N3/027—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 using electric or magnetic heating means
-
- 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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- 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
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
-
- 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
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/405—Multiple injections with post injections
-
- 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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- 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
- F01N2430/08—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing
- F01N2430/085—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing at least a part of the injection taking place during expansion or exhaust stroke
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
-
- 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
- Y02T10/12—Improving ICE efficiencies
-
- 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 present invention relates to a process for managing the operation of a sys t th exhaust combustion engine of the type comprising a particulate filter and means controlled aid r generation of the filter.
- soot particles burn at temperatures of the order of 550 to 600 ° C.
- thermal levels are only rarely reached by the exhaust gases of an automotive diesel engine since, for example, in the city the temperature of the exhaust gases varies between 150 and 250 °.
- suitable means for raising the temperature of the gases when it is desired to regenerate such a particle filter are only rarely reached by the exhaust gases of an automotive diesel engine since, for example, in the city the temperature of the exhaust gases varies between 150 and 250 °.
- Electric resistance heating systems including grates heating, bring the temperature of the exhaust gas to a value sufficient to cause combustion of the particles in the filter.
- This monoxide and these hydrocarbons can also participate in the increase of exhaust gases by reacting with exothermic reactions before their arrival in the particulate filter. Exothermic reactions are obtained when passing through an oxidation catalyst located upstream of the particulate filter.
- soot particles Furthermore, to minimize the energy expenditure necessary for the combustion of soot particles, it is also known to lower this combustion temperature of soot by using suitable catalysts. Thus, it is known to add an additive such as an organometallic compound to the fuel. This additive mixture with the fuel is found in the soot particles which allows it to play a catalytic role during the combustion of the soot particles and to lower the ignition temperatures of the latter.
- an additive such as an organometallic compound
- FR2774421 discloses such a system for managing the operation of a particle filter associated with a diesel engine, in particular of a motor vehicle, and describes how the actuation of the means of aid for regeneration is triggered as soon as the mass of soot in the filter is greater than a threshold value, this mass of soot being determined from the measurement of the pressure drop across the particulate filter and of the engine operating conditions.
- the strategy of activating the regeneration assistance means is relatively simple. It essentially consists in keeping these means activated for a calibrated period of time or even in maintaining the means activated as long as the load has not returned to below a second given threshold value.
- the activation of the regeneration means leads to a relatively significant overconsumption of fuel, it is therefore advisable to adjust this activation to the strict minimum. Indeed, it has appeared to the Applicant that when the soot begins to burn, it is generally no longer necessary to continue heating the exhaust gases, the heat given off by the combustion self-feeding the latter.
- the object of the present invention therefore consists in minimizing the duration of activation of the regeneration assistance means so as to limit their impact on fuel consumption, thanks to a stratum which is simple to implement.
- the management method according to the invention therefore relates to a particulate filter equipping the exhaust line of an internal combustion engine, this method notably consists in triggering the activation of means for assisting the regeneration of the filter according to predetermined criteria, for example as soon as the loading in particles of the filter (6) exceeds a threshold value.
- the method is characterized in that the operating parameters of the regeneration assistance means, such as the duration or the intensity, are adjusted according to the progress of the regeneration of the filter.
- the regeneration of the filter is obtained by combustion of the particles and in that the means for assisting in the regeneration are stopped as soon as the comioustion of the particles is initiated.
- the initiation of combustion is determined from the estimation or measurement of the energy released by the filter.
- the initiation of combustion is determined from an estimate of the temperature of the gases leaving the filter by assuming that there is no combustion in the filter and comparing this estimated temperature to the actual measured temperature.
- the progress of the combustion is monitored so as to possibly reactivate the combustion of the particles if this combustion were to extinguish. prematurely.
- the extinction of combustion is deduced from the level of energy released by the filter, this level of energy being measured or estimated.
- the extinction is determined on the basis of an estimate of the temperature of the gases leaving the filter by assuming that there is no combustion in the filter and comparing this estimated temperature to the actual measured temperature.
- monitoring is only carried out for a predetermined period of time after the initiation of combustion.
- FIG. 1 is a schematic view of an internal combustion engine equipped with a particle filter, implementing the method according to one invention
- FIG. 2 is a flowchart specifying the different possible steps of the method according to the invention.
- reference 1 an internal combustion engine
- This engine is in the example illustrates a diesel engine supercharged by turbocharger with four in-line cylinders and direct fuel injection.
- the exhaust line 5 of this engine is equipped with an exhaust system provided with a device for filtering the emitted soot particles.
- the engine 1 is supplied with air through an intake circuit 2.
- Appropriate sensors and in particular a flow meter 8, equip this intake circuit to supply information to the engine control computer 3 on the pressure, the temperature or the flow rate of the air supplying the engine.
- Fuel injection into the cylinders is provided by electromagnetic in ectors not shown opening into the combustion chambers and piloted by the engine control computer 3 from a pressurized fuel circuit 4 of the common rail type also called system high pressure common rail supply.
- the exhaust gases discharged in line 5 pass through a particle filter 6.
- EGR circuit 11 of conventional design comprising a valve 12, the opening of which is controlled by the engine computer 3.
- This computer motor control 3 is conventionally made up of a microprocessor or central processing unit CPU, random access memories RAM, read-only memories ROM, analog-digital converters A / D, and various interfaces of inputs and outputs.
- the microprocessor of the injection computer 3 includes electronic circuits and appropriate software for processing the signals from the various sensors, deducing the states of the engine and generating the appropriate control signals intended in particular for the different pilot actuators.
- the computer 3 controls the fuel pressure in the ramp and the opening of the mjectors, on the basis of the information supplied by the various sensors and in particular of the air mass supplied, the engine speed as well as formulas and Memorized calibrations to achieve the desired consumption and performance levels.
- the opening of the injectors is more particularly defined by the instant of start of injection and the duration of opening of the injectors, duration which corresponds for a given supply pressure to a quantity of fuel injected and therefore to a duration of the mixture filling the comoustion chambers.
- the computer 3 is also suitable for managing the operation of the exhaust system and in particular of the particle filter 6.
- the computer 3 deduces from the information provided in particular by the sensors pressure 7, the filling level of the filter.
- the computer 3 then triggers, as a function of the value of the soot loading of the filter, a regeneration phase in accordance with suitable strategies.
- This regeneration phase essentially consists in increasing the temperature of the exhaust gases passing through the filter 6 so as to ignite the trapped particles. This increase in temperature is initiated by the activation of appropriate regeneration aid means, hereinafter generically called heating means.
- cnauffage can be employed, one can for example quote electric heating resistors arranged in the flow of the exhaust gases, or still, a rise in the temperature of the exhaust gases by afterburning. This increase in the temperature of the exhaust gases by afterburning can be achieved by simple co-operation of the injectors, for example by injecting an additional quantity of fuel in the expansion tank for a given number of engine cycles.
- the computer 3 is also suitable for implementing a control of the triggering and the progress of the regeneration of the filter and a control of the operation and of the integrity of the filter including in particular a driver alert in the event of a malfunction.
- the method for managing the operation of the particle filter according to the invention therefore consists in optimizing the duration of activation of the heating means to minimize their impact on the fuel consumption of the vehicle.
- the principle of the strategy is as follows. As soon as the filter regeneration phase has been ordered, continued for example when crossing the loading threshold, the heating means are activated until the combustion of soot in the filter is initiated. As soon as the initiation of combustion detected, the heating means are stopped.
- soot being exothermic, it self-maintains as long as there remains a sufficient amount of soot to burn. As a result, once combustion has started it is generally no longer necessary to heat the exhaust gas or the filter.
- the characterization of the initiation of combustion can be done in different ways and in particular by simple analysis of the temperature of the gases at the outlet of the filter. This criterion may however be insufficient under certain conditions.
- the Applicant has therefore developed various criteria allowing reliable detection of the initiation of combustion.
- the regeneration phase is triggered and therefore the heating means are put into action.
- the calculation of the quantity Taval_ is representative of the temperature at the outlet of the particle filter in the absence of combustion in the filter.
- This Taval_est value is obtained by a heat transfer model which therefore assumes no heat input due to combustion when passing through the filter.
- the energy of the gases entering the filter is distributed between the filter, the convection losses of the filter to the outside and the energy of the gases leaving.
- Tfap_i temperature of the filter (assumed to be uniform at time i, to simplify Tfap_i is taken equal to Taval_est_i the temperature estimated at time i; h convection coefficient (precalibrated in a map);
- Taval_est_0 is taken equal to Taval_mes_0.
- Taval_mes being thus determined at time i, it is used to determine if the initiation of combustion has occurred using one or the other of the following tests:
- S ⁇ T1 and SP1 being calibrated threshold values whose exceedances allow us to conclude with certainty that there is an exothermic combustion reaction in the filter.
- the activation of the heating means is therefore stopped.
- This stopping of the implementation of the heating means is operated either instantaneously as soon as the thresholds S ⁇ T1 or SP1 crossed, or after a delay, in an alternative embodiment, adapted delay which can reach a few seconds.
- the Applicant has been able to determine that if the combustion exceeds a predetermined duration, denoted Taut, it then becomes autonomous and can no longer be extinguished, whatever the operating conditions of the engine and in particular whatever the flow rate and the temperature. exhaust gases. It is therefore sufficient to observe whether the combustion continues for a period Taut following the initiation of combustion. If the combustion of the soot has indeed been prolonged, it is because the combustion is definitely launched and will go to its end. If on the other hand the combustion has extinguished in the meantime, it is then possible to attempt to restart it by relaunching the process of putting the heating means into action.
- Taut a predetermined duration
- the above criteria are used with second possibly separate threshold values S ⁇ T2 or SP2. Indeed, if the combustion of soot stops or slows down, the energy released decreases and therefore the level of the aforementioned criteria decreases. It is therefore sufficient to observe their passage below a calibrated threshold (S ⁇ T2 or SP2) to characterize the combustion stop.
- the heating means are restarted according to the strategy described above or possibly according to an adapted strategy using for example a new threshold SI 'instead of SI.
- total regeneration time which accounts for the total duration of the regeneration procedure.
- the values taken by this counter are monitored so as to keep the regeneration process within a predetermined time window. Indeed, if after a suitable period of time, combustion could not be conducted until autonomy, it is because there is a malfunction and there is no point in continuing to activate the means of heater. As soon as the counter Cpt3 exceeds a threshold value S3, the regeneration phase is therefore stopped and an error message possibly sent to the driver, for example.
- the heating means are restarted either, instantly as soon as the S ⁇ T2 or SP2 thresholds are crossed downward, or, in an alternative embodiment, after a time delay.
- This delay makes it possible to ensure a certain reloading in particles of the filter 6 favorable to the reinitialization of the combustion.
- the value of the threshold S3 is adjusted accordingly.
- combustion monitoring strategy is operated instantaneously as soon as the initiation of combustion is detected, or alternatively, in an alternative embodiment, this monitoring is only carried out after a suitable delay of a few seconds.
- Stopping the heating means as soon as the initiation of combustion detected not only makes it possible to limit the energy expenditure to the just necessary to ensure the regeneration of the filter, but also it improves the combustion of soot in the filter, in particular when the heating means operate using post-combustion phenomena of hydrocarbons. Stopping these afterburning reactions makes it possible, in fact, to increase the quantity of oxygen present in the exhaust gases and therefore to promote the combustion of soot by acting as a forge bellows.
- the invention is in no way limited to the embodiment described and illustrated, which has only been given by way of example.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00993633A EP1240415A2 (fr) | 1999-12-23 | 2000-12-22 | Procede de gestion du fonctionnement d'un filtre a particules pour moteur a combustion |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/16349 | 1999-12-23 | ||
FR9916349A FR2802972B1 (fr) | 1999-12-23 | 1999-12-23 | Procede de gestion du fonctionnement d'un filtre a particules pour moteur a combustion |
Publications (2)
Publication Number | Publication Date |
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WO2001048358A2 true WO2001048358A2 (fr) | 2001-07-05 |
WO2001048358A3 WO2001048358A3 (fr) | 2002-05-23 |
Family
ID=9553721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/003665 WO2001048358A2 (fr) | 1999-12-23 | 2000-12-22 | Procede de gestion du fonctionnement d'un filtre a particules pour moteur a combustion |
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Country | Link |
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EP (1) | EP1240415A2 (fr) |
FR (1) | FR2802972B1 (fr) |
WO (1) | WO2001048358A2 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2840820A1 (fr) * | 2002-06-18 | 2003-12-19 | Renault Sa | Procede de regeneration d'un filtre a particules de vehicule automobile et systeme de commande de la regeneration d'un tel filtre |
FR2876732A1 (fr) * | 2004-10-18 | 2006-04-21 | Renault Sas | Systeme et procede de regulation de la regeneration d'un filtre a particules de moteur a combustion interne |
FR2902823A1 (fr) * | 2006-06-27 | 2007-12-28 | Renault Sas | Procede de regeneration d'un filtre a particules d'une conduite d'echappement d'un moteur a combustion interne |
WO2008036010A1 (fr) * | 2006-09-19 | 2008-03-27 | Industriell Plåtproduktion Ab | Système pour gaz d'échappement |
KR100885226B1 (ko) * | 2002-06-18 | 2009-02-24 | 르노 에스.아.에스. | 자동차의 입자 필터의 재생 방법 및 재생 제어 시스템 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6622480B2 (en) * | 2001-02-21 | 2003-09-23 | Isuzu Motors Limited | Diesel particulate filter unit and regeneration control method of the same |
FR2829798B1 (fr) * | 2001-09-14 | 2004-01-23 | Renault | Procede de gestion du fonctionnement d'un filtre a particules revetu d'une phase catalytique pour moteur a combustion |
FR2846038B1 (fr) * | 2002-10-22 | 2006-12-22 | Renault Sa | Procede de determination de la temperature interne d'un filtre a particules, procede de commande de la generation du filtre a particules, systeme de commande et filtre a particules correspondant. |
FR2855213B1 (fr) * | 2003-05-23 | 2005-07-15 | Renault Sa | Procede et dispositif pour controler la regeneration d'un filtre a particules et ensemble de motorisation comprenant un tel dispositif |
JP4434038B2 (ja) * | 2004-04-05 | 2010-03-17 | 株式会社デンソー | 内燃機関の排気浄化装置 |
FR2872214B1 (fr) | 2004-06-23 | 2006-11-03 | Peugeot Citroen Automobiles Sa | Systeme de controle de la regeneration de moyens de depollution |
FR2872200B1 (fr) * | 2004-06-23 | 2006-11-03 | Peugeot Citroen Automobiles Sa | Systeme d'aide a la regeneration de moyens de depollution associes a des moyens formant catalyseur |
FR2872213B1 (fr) | 2004-06-23 | 2006-11-03 | Peugeot Citroen Automobiles Sa | Systeme d'aide a la regeneration de moyens de depollution pour moteur de vehicule automobile |
FR2876737B1 (fr) * | 2004-10-19 | 2006-12-22 | Renault Sas | Systeme et procede de controle d'une phase de regeneration d'un filtre a particules de vehicule automobile |
FR2876733B1 (fr) | 2004-10-20 | 2006-12-22 | Renault Sas | Systeme et procede de regulation de la regeneration d'un filtre a particules de moteur a combustion interne |
GB2486416A (en) * | 2010-12-13 | 2012-06-20 | Gm Global Tech Operations Inc | Method for controlling the regeneration process of a lean NOx trap |
FR3055658B1 (fr) * | 2016-09-08 | 2018-09-07 | Peugeot Citroen Automobiles Sa | Procede d’aide a une regeneration d’un filtre a particules dans une ligne d’echappement |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2774421A1 (fr) | 1998-02-02 | 1999-08-06 | Peugeot | Systeme de gestion du fonctionnement d'un filtre a particules associe a un moteur diesel notamment de vehicule automobile |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1216200A (fr) * | 1983-02-03 | 1987-01-06 | Vemulapalli D.N. Rao | Fonctionnement d'un capteur de recyclage pour moteur diesel |
JPH0621552B2 (ja) * | 1989-02-13 | 1994-03-23 | いすゞ自動車株式会社 | パティキュレートトラップの再燃焼装置 |
FR2774424B1 (fr) * | 1998-02-02 | 2000-04-21 | Peugeot | Systeme de controle du fonctionnement d'une ligne d'echappement d'un moteur diesel notamment de vehicule automobile, equipee d'un filtre a particules |
-
1999
- 1999-12-23 FR FR9916349A patent/FR2802972B1/fr not_active Expired - Fee Related
-
2000
- 2000-12-22 WO PCT/FR2000/003665 patent/WO2001048358A2/fr not_active Application Discontinuation
- 2000-12-22 EP EP00993633A patent/EP1240415A2/fr not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2774421A1 (fr) | 1998-02-02 | 1999-08-06 | Peugeot | Systeme de gestion du fonctionnement d'un filtre a particules associe a un moteur diesel notamment de vehicule automobile |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2840820A1 (fr) * | 2002-06-18 | 2003-12-19 | Renault Sa | Procede de regeneration d'un filtre a particules de vehicule automobile et systeme de commande de la regeneration d'un tel filtre |
WO2003106823A1 (fr) * | 2002-06-18 | 2003-12-24 | Renault S.A.S | Procede de regeneration d’un filtre a particules de vehicule automobile et systeme de commande de la regeneration d’un tel filtre |
KR100885226B1 (ko) * | 2002-06-18 | 2009-02-24 | 르노 에스.아.에스. | 자동차의 입자 필터의 재생 방법 및 재생 제어 시스템 |
US7536854B2 (en) | 2002-06-18 | 2009-05-26 | Renault S.A.S | Method for regenerating a motor vehicle particle filter and system for controlling regeneration of such a filter |
FR2876732A1 (fr) * | 2004-10-18 | 2006-04-21 | Renault Sas | Systeme et procede de regulation de la regeneration d'un filtre a particules de moteur a combustion interne |
WO2006042987A1 (fr) * | 2004-10-18 | 2006-04-27 | Renault S.A.S | Systeme et procede de regulation de la regeneration d'un filtre a particules de moteur a combustion interne |
FR2902823A1 (fr) * | 2006-06-27 | 2007-12-28 | Renault Sas | Procede de regeneration d'un filtre a particules d'une conduite d'echappement d'un moteur a combustion interne |
WO2008036010A1 (fr) * | 2006-09-19 | 2008-03-27 | Industriell Plåtproduktion Ab | Système pour gaz d'échappement |
Also Published As
Publication number | Publication date |
---|---|
FR2802972B1 (fr) | 2002-05-03 |
WO2001048358A3 (fr) | 2002-05-23 |
EP1240415A2 (fr) | 2002-09-18 |
FR2802972A1 (fr) | 2001-06-29 |
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