US20060090458A1 - System for estimating the soot load of a particle filter - Google Patents

System for estimating the soot load of a particle filter Download PDF

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Publication number
US20060090458A1
US20060090458A1 US11/266,600 US26660005A US2006090458A1 US 20060090458 A1 US20060090458 A1 US 20060090458A1 US 26660005 A US26660005 A US 26660005A US 2006090458 A1 US2006090458 A1 US 2006090458A1
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United States
Prior art keywords
engine
soot
particle filter
unit
load
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.)
Abandoned
Application number
US11/266,600
Inventor
Julien Marcelot
Frank Reyes
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Assigned to PEUGEOT CITROEN AUTOMOBILES SA reassignment PEUGEOT CITROEN AUTOMOBILES SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MARCELOT, MR. JULIEN, REYES, MR. FRANK
Publication of US20060090458A1 publication Critical patent/US20060090458A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1466—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a soot concentration or content
    • F02D41/1467—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a soot concentration or content with determination means using an estimation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0812—Particle filter loading
    • 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
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/703—Atmospheric pressure
    • 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 system for estimating the soot load of a particle filter.
  • the invention relates to such a system for evaluating the load in a particle filter integrated in the exhaust system of a motor vehicle diesel engine.
  • a mode of engine operation is triggered for regenerating the particle filter, in which use is made of multiple injections of fuel into the cylinders of the engine in the form of pre-injection or pilot injection, main injection, and post-injection.
  • soot mass limit 6 maximum quantity of soot per liter of fuel is defined that must not be exceeded, with this maximum quantity being referred to as the soot mass limit (SML).
  • one technique consists in using the back pressure across the inlet and outlet of the particle filter, thereby giving an image of the filter load.
  • the problem is that for given back pressure, it is possible to have various different soot loads depending on the type of driving that has been performed.
  • Another technique consists in recognizing the type of driving, and distinguishing various types of driving, e.g. five types, each associated with a corresponding soot emission rate.
  • the problem with that technique is that it is lengthy to develop and requires a large amount of driving and testing on a roller bench.
  • the object of the invention is thus to solve those problems.
  • the invention provides a system for evaluating the soot load of a particle filter integrated in a diesel engine exhaust line of a motor vehicle, the system comprising:
  • storage means for storing a pre-established map of unit soot emission rates for each speed/load operating point of the engine
  • acquisition means for acquiring the current operating point of the engine in order to determine the corresponding unit soot emission rate
  • accumulator means for accumulating the unit emission rates while the engine is in operation in order to determine the soot load of the particle filter.
  • the corrector means comprise means for making a correction as a function of atmospheric pressure
  • the corrector means comprise means for making a correction as a function of the temperature of air in the environment of the vehicle;
  • the corrector means comprise means for making a correction as a function of the temperature of the vehicle engine cooling liquid.
  • the FIGURE shows a system for estimating the soot load of a particle filter integrated in an exhaust system of a motor vehicle diesel engine.
  • the system comprises means for storing a pre-established map of levels of soot emission corresponding to each speed/load operating point of the engine.
  • Accumulator means for accumulating these unit rates while the engine is in operation are then used to determine the soot load of the particle filter.
  • These accumulator means are given overall reference 2 and comprise means for adding a determined unit value to a previously accumulated quantity, e.g. stored in storage means 3 .
  • the means for storing the map serve to store unit particle emission rates over the entire operating range of the engine for the various stabilized operating points of the engine.
  • such correction means may include means for making a correction as a function of atmospheric pressure, and given overall reference 4 in the FIGURE, means for making a correction as a function of air temperature around the vehicle, given overall reference 5 , and means for making a correction as a function of the temperature of the cooling liquid for the vehicle engine, as represented by general reference 6 .

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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)

Abstract

This system for evaluating the soot load of a particle filter integrated in a diesel engine exhaust system of a motor vehicle comprises: storage means for storing a pre-established map of unit soot emission rates for each speed/load operating point of the engine; acquisition means for acquiring the current operating point of the engine in order to determine the corresponding unit soot emission rate; and accumulator means for accumulating the unit emission rates while the engine is in operation in order to determine the soot load of the particle filter.

Description

  • The present invention relates to a system for estimating the soot load of a particle filter.
  • More particularly, the invention relates to such a system for evaluating the load in a particle filter integrated in the exhaust system of a motor vehicle diesel engine.
    • BACKGROUND OF THE INVENTION
  • It is known that engines of that type emit particles in operation, which particles are trapped in a filter. The filter thus becomes progressively clogged up, thereby increasing the back pressure in the exhaust system, and as a result it is necessary to regenerate the filter periodically.
  • To do this, a mode of engine operation is triggered for regenerating the particle filter, in which use is made of multiple injections of fuel into the cylinders of the engine in the form of pre-injection or pilot injection, main injection, and post-injection.
  • These various injections serve to increase the temperature of the exhaust gas, in particular by leading to post combustion during the expansion stage of the engine cycle and to catalytic post combustion of the unburnt hydrocarbons on an oxidation catalyst placed upstream from the particle filter, for example.
  • However, beyond a certain quantity of soot trapped in the filter, there is a risk of the filter breaking because of the thermomechanical stresses generated by burning the soot.
  • In order to avoid breaking the filter in this way, i.e. in order to limit thermomechanical stresses, a soot mass limit 6 maximum quantity of soot per liter of fuel is defined that must not be exceeded, with this maximum quantity being referred to as the soot mass limit (SML).
  • In order to comply with this SML criterion, it is therefore necessary to estimate the quantity of soot stored in the particle filter in order to regenerate it at the appropriate moment.
  • Several techniques already exist in the prior art for estimating the load of soot in a particle filter.
  • Thus, for example, one technique consists in using the back pressure across the inlet and outlet of the particle filter, thereby giving an image of the filter load.
  • The problem is that for given back pressure, it is possible to have various different soot loads depending on the type of driving that has been performed.
  • Another technique consists in recognizing the type of driving, and distinguishing various types of driving, e.g. five types, each associated with a corresponding soot emission rate. The problem with that technique is that it is lengthy to develop and requires a large amount of driving and testing on a roller bench.
    • OBJECT AND SUMMARY OF THE INVENTION
  • The object of the invention is thus to solve those problems.
  • To this end, the invention provides a system for evaluating the soot load of a particle filter integrated in a diesel engine exhaust line of a motor vehicle, the system comprising:
  • storage means for storing a pre-established map of unit soot emission rates for each speed/load operating point of the engine;
  • acquisition means for acquiring the current operating point of the engine in order to determine the corresponding unit soot emission rate;
  • corrector means for correcting the unit rate as determined in this way; and
  • accumulator means for accumulating the unit emission rates while the engine is in operation in order to determine the soot load of the particle filter.
  • According to other characteristics:
  • the corrector means comprise means for making a correction as a function of atmospheric pressure;
  • the corrector means comprise means for making a correction as a function of the temperature of air in the environment of the vehicle; and
  • the corrector means comprise means for making a correction as a function of the temperature of the vehicle engine cooling liquid.
    • BRIEF DESCRIPTION OF THE DRAWING
  • The invention can be better understood on reading the following description given purely by way of example and made with reference to the accompanying drawing, which is a block diagram showing the structure and the operation of an estimator system of the invention.
    • MORE DETAILED DESCRIPTION
  • The FIGURE shows a system for estimating the soot load of a particle filter integrated in an exhaust system of a motor vehicle diesel engine.
  • The system comprises means for storing a pre-established map of levels of soot emission corresponding to each speed/load operating point of the engine.
  • These storage means are given overall reference 1 in the FIGURE and, on the basis of means for acquiring the current operating point of the engine, in terms of speed and load, they make it possible to determine the corresponding unit rate of soot emission.
  • Accumulator means for accumulating these unit rates while the engine is in operation are then used to determine the soot load of the particle filter.
  • These accumulator means are given overall reference 2 and comprise means for adding a determined unit value to a previously accumulated quantity, e.g. stored in storage means 3.
  • Thus, the means for storing the map serve to store unit particle emission rates over the entire operating range of the engine for the various stabilized operating points of the engine.
  • On an engine test bench, it is entirely possible, for each speed and load operating point, to determine the rate of soot emission, e.g. in grams per second (g/s).
  • Such a map is of considerable interest insofar as it enables the time required to develop the system to be reduced considerably.
  • It suffices to place one engine (or two engines in order to make allowance for dispersion between engines) on an engine test bench together with particle analysis means in order to calibrate the map. Once the map has been calibrated, it can be used for all applications using the engine.
  • In addition, it is also possible to make use of means for correcting the determined unit emission rates.
  • Thus, for example, such correction means may include means for making a correction as a function of atmospheric pressure, and given overall reference 4 in the FIGURE, means for making a correction as a function of air temperature around the vehicle, given overall reference 5, and means for making a correction as a function of the temperature of the cooling liquid for the vehicle engine, as represented by general reference 6.
  • These various corrections are then applied at the output from the means for determining the unit emission rates via a corrector given overall reference 7.
  • Naturally, other dispositions could also be envisaged.
  • It will readily be understood that such a system presents certain advantages, in particular in terms of its simplicity of implementation.

Claims (4)

1. A system for evaluating the soot load of a particle filter integrated in a diesel engine exhaust line of a motor vehicle, the system comprising:
storage means for storing a pre-established map of unit soot emission rates for each speed/load operating point of the engine;
acquisition means for acquiring the current operating point of the engine in order to determine the corresponding unit soot emission rate;
corrector means for correcting the unit rate as determined in this way; and
accumulator means for accumulating the unit emission rates while the engine is in operation in order to determine the soot load of the particle filter.
2. A system according to claim 1, wherein the corrector means comprise means for making a correction as a function of atmospheric pressure.
3. A system according to claim 1, wherein the corrector means comprise means for making a correction as a function of the temperature of air in the environment of the vehicle.
4. A system according to claim 1, wherein the corrector means comprise means for making a correction as a function of the temperature of the vehicle engine cooling liquid.
US11/266,600 2004-11-04 2005-11-03 System for estimating the soot load of a particle filter Abandoned US20060090458A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0411776A FR2877394B1 (en) 2004-11-04 2004-11-04 SYSTEM FOR ESTIMATING THE CHARGE IN SOILS OF A PARTICLE FILTER
FR0411776 2004-11-04

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080202103A1 (en) * 2006-12-22 2008-08-28 Greg Henderson Software, methods and systems including soot loading metrics
US20140165535A1 (en) * 2012-12-14 2014-06-19 GM Global Technology Operations LLC System and method for controlling regeneration within an after-treatment component of a compression-ignition engine
CN110307067A (en) * 2018-03-27 2019-10-08 Fev欧洲有限责任公司 It calculates the method for the amount of soot in particulate filter, control method, exhaust after treatment system, vehicle and the program product of amount of soot
CN110410186A (en) * 2018-04-26 2019-11-05 罗伯特·博世有限公司 The detection method and system of particle object amount, storage medium and control unit

Families Citing this family (3)

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FR2916229A1 (en) * 2007-05-16 2008-11-21 Renault Sas Pollutant e.g. soot, emission controlling method for motor vehicle, involves estimating quantity of injected fuel based on injection set point, and estimating soot mass from estimation of injected fuel quantity
FR2930290A3 (en) * 2008-04-17 2009-10-23 Renault Sas Regeneration cycle managing method for diesel engine of motor vehicle, involves comparing estimated and real trapped particle loading levels, and correcting predetermined particle emission model based on comparison result
FR2999232B1 (en) * 2012-12-06 2015-02-20 Peugeot Citroen Automobiles Sa METHOD FOR MANAGING THE REGENERATION OF A FILTER SYSTEM OF PARTICLE FILTER TYPE

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US6574956B1 (en) * 2000-11-03 2003-06-10 Ford Global Technologies, Llc Apparatus and method for interrupting regeneration of a particulate filter in a diesel engine
US20030230077A1 (en) * 2002-06-14 2003-12-18 Tsukasa Kuboshima Exhaust gas cleaning system having particulate filter
US6945037B2 (en) * 2001-01-08 2005-09-20 Robert Bosch Gmbh Method and device for controlling an exhaust treatment system
US7174706B2 (en) * 2004-04-05 2007-02-13 Denso Corporation Exhaust emission control system for internal combustion engine
US7243491B2 (en) * 2003-05-16 2007-07-17 Denso Corporation Exhaust gas purification system of internal combustion engine
US7325395B2 (en) * 2005-04-08 2008-02-05 Denso Corporation Exhaust gas purification device of internal combustion engine

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DE3729857C1 (en) * 1987-09-05 1988-11-17 Uni Cardan Ag Method for the regeneration of a soot separator
JP2543608B2 (en) * 1990-02-07 1996-10-16 日産自動車株式会社 Engine exhaust purification device
FR2804173B1 (en) * 2000-01-20 2002-05-03 Peugeot Citroen Automobiles Sa SYSTEM FOR AIDING THE REGENERATION OF A PARTICLE FILTER INTEGRATED IN AN EXHAUST LINE OF A DIESEL MOTOR VEHICLE ENGINE
JP4092458B2 (en) * 2002-04-08 2008-05-28 日産自動車株式会社 Exhaust gas purification device

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
US6574956B1 (en) * 2000-11-03 2003-06-10 Ford Global Technologies, Llc Apparatus and method for interrupting regeneration of a particulate filter in a diesel engine
US6945037B2 (en) * 2001-01-08 2005-09-20 Robert Bosch Gmbh Method and device for controlling an exhaust treatment system
US20030230077A1 (en) * 2002-06-14 2003-12-18 Tsukasa Kuboshima Exhaust gas cleaning system having particulate filter
US7243491B2 (en) * 2003-05-16 2007-07-17 Denso Corporation Exhaust gas purification system of internal combustion engine
US7174706B2 (en) * 2004-04-05 2007-02-13 Denso Corporation Exhaust emission control system for internal combustion engine
US7325395B2 (en) * 2005-04-08 2008-02-05 Denso Corporation Exhaust gas purification device of internal combustion engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080202103A1 (en) * 2006-12-22 2008-08-28 Greg Henderson Software, methods and systems including soot loading metrics
US8171726B2 (en) 2006-12-22 2012-05-08 Cummins Inc. Software, methods and systems including soot loading metrics
US20140165535A1 (en) * 2012-12-14 2014-06-19 GM Global Technology Operations LLC System and method for controlling regeneration within an after-treatment component of a compression-ignition engine
US9562452B2 (en) * 2012-12-14 2017-02-07 GM Global Technology Operations LLC System and method for controlling regeneration within an after-treatment component of a compression-ignition engine
CN110307067A (en) * 2018-03-27 2019-10-08 Fev欧洲有限责任公司 It calculates the method for the amount of soot in particulate filter, control method, exhaust after treatment system, vehicle and the program product of amount of soot
CN110410186A (en) * 2018-04-26 2019-11-05 罗伯特·博世有限公司 The detection method and system of particle object amount, storage medium and control unit

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Publication number Publication date
FR2877394A1 (en) 2006-05-05
FR2877394B1 (en) 2010-09-10

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Owner name: PEUGEOT CITROEN AUTOMOBILES SA, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MARCELOT, MR. JULIEN;REYES, MR. FRANK;REEL/FRAME:017010/0809

Effective date: 20051118

STCB Information on status: application discontinuation

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