EP1197643A1 - Verfahren und Vorrichtung zum Regenerieren eines in der Abgasleitung eines einen Kraftwagen antreibenden Verbrennungsmotors angeordneten Partikelfilters - Google Patents

Verfahren und Vorrichtung zum Regenerieren eines in der Abgasleitung eines einen Kraftwagen antreibenden Verbrennungsmotors angeordneten Partikelfilters Download PDF

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Publication number
EP1197643A1
EP1197643A1 EP01402642A EP01402642A EP1197643A1 EP 1197643 A1 EP1197643 A1 EP 1197643A1 EP 01402642 A EP01402642 A EP 01402642A EP 01402642 A EP01402642 A EP 01402642A EP 1197643 A1 EP1197643 A1 EP 1197643A1
Authority
EP
European Patent Office
Prior art keywords
engine
filter
activation
temperature
exhaust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01402642A
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English (en)
French (fr)
Other versions
EP1197643B1 (de
Inventor
Pierre Blanche
Benoít Thuault
Romuald Chaumeux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP1197643A1 publication Critical patent/EP1197643A1/de
Application granted granted Critical
Publication of EP1197643B1 publication Critical patent/EP1197643B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • F02D2041/026—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 using an external load, e.g. by increasing generator load or by changing the gear ratio
    • 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

Definitions

  • the present invention relates to a method of regeneration of a particulate filter placed in the line exhaust of an internal combustion engine propelling a motor vehicle. More specifically, this invention relates to such a method according to which detects the impending blockage of the filter and prevents clogging by sweeping the filter with a exhaust gas stream at a minimum temperature equal to the auto-ignition temperature of the particles.
  • FIG. 1 of the attached drawing Schematically shown in Figure 1 of the attached drawing the exhaust line of an engine internal combustion 1, more particularly of the type Diesel.
  • This conventionally includes a catalytic converter 2 oxidation of unburnt chemical species leaving the motor a filter 3 designed to retain, in particular, soot particles and other residues (oil, additives fuel, ...) carried by the engine exhaust.
  • This filter gradually clogging under the effect of the accumulation of these particles, it is necessary to provide means for unclogging the filter, implemented periodically.
  • These means commonly include a differential pressure sensor 4 placed across the particle filter 3 for delivering, to means of control constituted by a computer 5 for managing the motor 1, a signal representative of the pressure differential measured, corresponding to the pressure drop exhaust gases during the crossing of the filter, this pressure drop being all the greater as the fouling of the filter is more advanced.
  • the computer 5 triggers a regeneration of the filter by combustion of particles retained in the filtered. To do this it is necessary to pass the temperature exhaust gases passing through the filter, above the auto-ignition temperature of these particles, around 600 ° C. This can be achieved at using a burner. We can also provoke the necessary increase in gas temperature exhaust by temporarily degrading the efficiency of the motor by an appropriate control of the point of operation thereof (reduction of the angle of advance upon ignition, delay in opening the injectors of fuel) or by a suitable order of organs peripherals (butterfly regulating the incoming air flow in the engine, gas recirculation control valve exhaust in this engine, etc ).
  • the present invention therefore aims to provide a method of regenerating a particulate filter placed in the exhaust line of a motor vehicle, designed to ensure efficient regeneration of the filter, including understood when the engine propelling the vehicle is running in idle speed.
  • This object of the invention is achieved, as well as other which will appear on reading the description which will follow, with a regeneration process of the type described in preamble to this description, this process being remarkable in that, upon detection of a blockage imminent from the filter when the engine is running idle speed, activation of at least one energy consumer from engine operation, this consumer equipping the vehicle powered by this engine, this activation helping to increase the temperature of said exhaust gases up to the particle auto-ignition temperature.
  • the increase in temperature of the exhaust gases thus obtained allows the exhaust to be brought to a temperature close to 600 ° C. suitable for unclogging the filters by pyrolysis of soot or other particles residues it contains.
  • the device according to the invention comprises, in addition to the devices or bodies already described in the preamble to this description, "consumers” C 1 , C 2 , C 3 ,. .. these consumers being constituted by various pieces of equipment of a motor vehicle supplied with electrical energy by a distribution network 6 of this energy, this network being supplied by an alternator 7 mechanically coupled to the output shaft of the engine 1.
  • the alternator 7 then operates as a transducer, converting mechanical energy received from the engine into electrical energy suitable for supplying consumers C 1 , C 2 , C 3 ....
  • the aforementioned energy consumers are conventionally activated either by the driver of the vehicle, either by a command issued by the computer 5, then duly programmed to issue such a command.
  • the particulate filter regeneration process 3 according to the present invention, implemented using the Figure 1 device, is then established as follows.
  • the computer compares the current engine speed, known by measuring means conventional, not shown, at a threshold value (by example 1000rpm) below which we consider that the engine operates at idle speed and then delivers exhaust gases at a relatively temperature low, for example 200 ° C, very insufficient to allow destruction by pyrolysis of the soot particles and other residues that threaten to clog the filter particles.
  • a threshold value by example 1000rpm
  • the computer is duly programmed so that, if the engine speed is then below this threshold value, the computer automatically activates one or more of the consumers C 1 , C 2 , C 3 ... so as to increasing the electric power delivered by the alternator 7, and therefore the mechanical power that the engine 6 must provide to this alternator, so that the latter can supply the activated consumers.
  • the gases are managed to be heated exhaust temperature above 600 ° C approximately, which makes possible the auto-ignition of particles contained in filter 3, and therefore the cleaning by pyrolysis of this filter.
  • This degradation and this increase in idle speed can be all two controlled by the computer 5.
  • mapping shown in Figure 2 illustrates the efficiency of the gas heating process exhaust explained above. This mapping represents the exhaust gas temperature, upstream of the particle filter 3, depending on the speed R of the motor (in rpm) and the torque C delivered by this motor (in N ⁇ m).
  • the calculator 5 When the filter regeneration is complete, the calculator 5 temporarily deactivates consumers activated and brings the engine operating point to the position prior to the onset of regeneration.
  • the calculator can proceed by observing the evolution pressure drop in the filter, seen by the sensor differential pressure 4, or by detection, using a temperature sensor placed downstream of the filter, passage of a temperature peak, significant of what the amount of particles burned in the filter is reduced.
  • We can advantageously also proceed by observing the exhaust gas concentration of carbon, at the filter outlet, as described in the French patent application N ° 0009040 filed on 11 July 2000 by the plaintiff.
  • the method according to the invention of reheating of exhaust gases by activation of energy consumers in a motor vehicle allows, by participating in the heating of the gases used to burn the particles retained in the filter, shorten the duration of the degradation of the yield of engine when we use this means to ensure this pyrolysis. It also makes it possible to reduce or eliminate the time periods (traffic jams) during which any regeneration is impossible.
  • the invention is not limited to the mode of realization described and represented which was given only as an example. This is how the following process the invention could be used in combination with the use of a chemical additive added to the fuel of the motor, to lower the auto-ignition temperature particles retained in the filter. This is also how that filter regeneration could be triggered by detection of the crossing of a distance traveled by the vehicle (500 km for example) or a volume of fuel consumed by the engine, corresponding substantially at two successive blockages of the filter.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
EP01402642A 2000-10-12 2001-10-12 Verfahren und Vorrichtung zum Regenerieren eines in der Abgasleitung eines einen Kraftwagen antreibenden Verbrennungsmotors angeordneten Partikelfilters Expired - Lifetime EP1197643B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0013070 2000-10-12
FR0013070A FR2815379B1 (fr) 2000-10-12 2000-10-12 Procede et dispositif de regeneration d'un filtre a particules place dans la ligne d'echappement d'un moteur a combustion interne propulsant un vehicule automobile

Publications (2)

Publication Number Publication Date
EP1197643A1 true EP1197643A1 (de) 2002-04-17
EP1197643B1 EP1197643B1 (de) 2006-06-14

Family

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Family Applications (1)

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EP01402642A Expired - Lifetime EP1197643B1 (de) 2000-10-12 2001-10-12 Verfahren und Vorrichtung zum Regenerieren eines in der Abgasleitung eines einen Kraftwagen antreibenden Verbrennungsmotors angeordneten Partikelfilters

Country Status (3)

Country Link
EP (1) EP1197643B1 (de)
DE (1) DE60120587T2 (de)
FR (1) FR2815379B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2879671A1 (fr) * 2004-12-17 2006-06-23 Renault Sas Procede et dispositif de mise en condition de regeneration d'un filtre a particules de moteur diesel de vehicule automobile
GB2421591A (en) * 2004-12-22 2006-06-28 Detroit Diesel Corp Method and system for controlling internal combustion engine exhaust gas temperatures to facilitate regeneration of a particulate filter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT510611B1 (de) * 2010-11-02 2012-12-15 Hanspeter Dipl Ing Mayer Vorrichtung zum reinigen eines filters oder katalysators

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408057A1 (de) * 1984-03-05 1985-06-20 Daimler-Benz Ag, 7000 Stuttgart Verfahren zum zuenden von russabbrennfiltern und dieselmotor mit russabbrennfilter
EP0196421A2 (de) * 1985-04-04 1986-10-08 Zeuna-Stärker Gmbh & Co Kg Verfahren zum Regenerieren von Russfiltern bei Diesel-Brennkraftmaschinen
JPS63297722A (ja) * 1987-05-29 1988-12-05 Toyota Autom Loom Works Ltd ディ−ゼル排気浄化装置の再生方法
US5265418A (en) * 1990-02-27 1993-11-30 Orbital Engine Company (Australia) Pty Limited Exhaust emission control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3580606D1 (de) * 1984-03-31 1991-01-03 Mitsubishi Motors Corp Regenerationssystem fuer eine diesel-partikel-oxydierungseinrichtung.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408057A1 (de) * 1984-03-05 1985-06-20 Daimler-Benz Ag, 7000 Stuttgart Verfahren zum zuenden von russabbrennfiltern und dieselmotor mit russabbrennfilter
EP0196421A2 (de) * 1985-04-04 1986-10-08 Zeuna-Stärker Gmbh & Co Kg Verfahren zum Regenerieren von Russfiltern bei Diesel-Brennkraftmaschinen
JPS63297722A (ja) * 1987-05-29 1988-12-05 Toyota Autom Loom Works Ltd ディ−ゼル排気浄化装置の再生方法
US5265418A (en) * 1990-02-27 1993-11-30 Orbital Engine Company (Australia) Pty Limited Exhaust emission control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 130 (M - 808) 30 March 1989 (1989-03-30) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2879671A1 (fr) * 2004-12-17 2006-06-23 Renault Sas Procede et dispositif de mise en condition de regeneration d'un filtre a particules de moteur diesel de vehicule automobile
GB2421591A (en) * 2004-12-22 2006-06-28 Detroit Diesel Corp Method and system for controlling internal combustion engine exhaust gas temperatures to facilitate regeneration of a particulate filter
US7076945B2 (en) 2004-12-22 2006-07-18 Detroit Diesel Corporation Method and system for controlling temperatures of exhaust gases emitted from an internal combustion engine to facilitate regeneration of a particulate filter
US7322183B2 (en) 2004-12-22 2008-01-29 Detroit Diesel Corporation Method and system for controlling temperatures of exhaust gases emitted from an internal combustion engine to facilitate regeneration of a particulate filter

Also Published As

Publication number Publication date
DE60120587D1 (de) 2006-07-27
FR2815379B1 (fr) 2003-04-18
FR2815379A1 (fr) 2002-04-19
DE60120587T2 (de) 2007-05-31
EP1197643B1 (de) 2006-06-14

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