US20110185706A1 - Method for managing the regeneration of a diesel particulate filter (dpf) in a diesel engine system - Google Patents

Method for managing the regeneration of a diesel particulate filter (dpf) in a diesel engine system Download PDF

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Publication number
US20110185706A1
US20110185706A1 US13/017,124 US201113017124A US2011185706A1 US 20110185706 A1 US20110185706 A1 US 20110185706A1 US 201113017124 A US201113017124 A US 201113017124A US 2011185706 A1 US2011185706 A1 US 2011185706A1
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United States
Prior art keywords
intake air
dpf
engine
regeneration process
particulate filter
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
US13/017,124
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English (en)
Inventor
Alessia TUNINETTI
Igor ZANETTI
Stefano CASSANI
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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Publication date
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Assigned to GM Global Technology Operations LLC reassignment GM Global Technology Operations LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CASSANI, STEFANO, TUNINETTI, ALESSIA, ZANETTI, IGOR
Publication of US20110185706A1 publication Critical patent/US20110185706A1/en
Assigned to WILMINGTON TRUST COMPANY reassignment WILMINGTON TRUST COMPANY SECURITY AGREEMENT Assignors: GM Global Technology Operations LLC
Assigned to GM Global Technology Operations LLC reassignment GM Global Technology Operations LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WILMINGTON TRUST COMPANY
Abandoned legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • F02D2200/0406—Intake manifold pressure
    • 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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 technical field relates to a method for managing the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system.
  • DPF Diesel Particulate Filter
  • Diesel engines in order to satisfy tight emission legislation, are typically equipped with a Diesel Particulate Filter (DPF).
  • DPF Diesel Particulate Filter
  • Different location are possible for the DPF, according to the exhaust line/system architecture: i.e. a close-coupled DPF (CC), or an underfloor DPF (UF).
  • CC close-coupled DPF
  • UF underfloor DPF
  • Powertrain engine management systems typically include DPF specific control strategies to perform the following tasks, namely: determination of DPF filling level performance of the automatic procedure to empty-out the DPF once a certain filling level has been detected, this latter procedure being the so-called DPF regeneration process
  • DPF regeneration process is carried out during normal driving operation, no service or maintenance intervention being necessary.
  • the DPF regeneration process is a controlled combustion of the soot, internal to the DPF, ignited by means of a temperature increase of the exhaust gases flowing throughout the DPF.
  • this temperature increase up to approximately 630° C., has to be kept for a certain time (typically about 10 minutes) in all possible driving conditions, namely city driving, highway driving, and so on.
  • Exhaust gas temperature increase is obtained with a dedicated combustion mode, whereby mainly Fuel system and Air system controls are involved, during the regeneration process, by means of which the system gets a first temperature increase due to fuel combustion inside combustion chamber and a second temperature increase due to fuel oxydation inside the catalyst present in the exhaust line.
  • the typical injection pattern (fuel system) and air system actuators regulation (EGR, throttle, turbo charger) are changed to support the regeneration process itself.
  • the dedicated combustion mode performs a so called After-Injection which is a late fuel injection, namely an injection that occurs after top dead center (TDC); this additional fuel injection burns inside the combustion chamber.
  • the dedicated combustion mode performs at least a so-called Post-Injection (typically more than one) which is also a late fuel injection, an in particular occurs later than the After-Injection.
  • Post-Injection typically more than one
  • This additional fuel injection does not burn inside the combustion chamber, but reaches the diesel oxidation catalyst (DOC) in the exhaust line upstream the DPF where it oxidises releasing heat.
  • DOC diesel oxidation catalyst
  • EGR Exhaust Gas Recirculation
  • turbine control turbine control
  • swirl control etc.
  • various parameters such as Exhaust Gas Recirculation (EGR), throttle valve position, turbine control, swirl control, etc. are managed according to engine status to provide the necessary air charge to support DPF regeneration (RGN) specific combustion mode.
  • RGN DPF regeneration
  • At least on object is to devise conditions suitable to allow a safety DPF regeneration process. Another object is to provide a method for operating the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system without using complex devices and by taking advantage from the computational capabilities of the Electronic Control Unit (ECU) of the vehicle. At least another object is to meet these goals by means of a simple, rational and inexpensive solution.
  • DPF Diesel Particulate Filter
  • ECU Electronic Control Unit
  • An embodiment is provided for a method for managing the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system, the engine having an intake and an exhaust line and being configured to after-inject or post-inject quantities of fuel into a combustion chamber for raising the temperature of the engine exhaust gas, the engine comprising in said exhaust line a Diesel Particulate Filter (DPF), the method comprising the following steps: identify a faulty condition of the engine system and, in case that such faulty condition is not critical, measure the intake air charge and, in case such intake air charge is acceptable, and perform a regeneration process for said Diesel Particulate Filter (DPF).
  • DPF Diesel Particulate Filter
  • a further embodiment provides for a method for operating the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system in which said measurement of the intake air charge is performed measuring intake air flow rate and intake air pressure in order to determine if these parameters are inside an acceptable range for initiating the regeneration process.
  • DPF Diesel Particulate Filter
  • a still further embodiment provides for a method for operating the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system in which said the acceptable range of the intake air charge is determined as a function of engine working point.
  • DPF Diesel Particulate Filter
  • Another embodiment provides for a method for operating the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system in which said regeneration process is performed in a safe mode.
  • DPF Diesel Particulate Filter
  • Another embodiment provides for a method in which said safety-mode regeneration process is performed using a lower temperature set-point and employing a longer process duration with respect to the temperature set-point and duration of a conventional DPF regeneration process.
  • This embodiment has the advantage of performing a safer regeneration process even in case of non-critical faulty conditions of the engine system.
  • the method according to one of the embodiments can be realized in the form of a computer program comprising a program-code to carry out all the steps of the method and in the form of a computer program product comprising means for executing the computer program.
  • the computer program product comprises, according to an embodiment, a control apparatus for an IC engine, for example the ECU of the engine, in which the program is stored so that the control apparatus defines such embodiment or embodiments in the same way as the method. In this case, when the control apparatus executes the computer program all the steps of the method according to the embodiments described are carried out.
  • the method according to one of the embodiments can be also realized in the form of an electromagnetic signal.
  • the signal being modulated to carry a sequence of data bits which represent a computer program to carry out all steps of the method.
  • a still further embodiment provides an internal combustion engine specially arranged for carrying out the method.
  • FIG. 1 is a schematic representation illustrating a flowchart of the steps of the method in accordance with an embodiment.
  • the method for managing the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system provides first for the identification of the presence of any faulty condition of the engine system in the check fault stage of FIG. 1 .
  • Most frequently part of the faulty conditions such identified are not major or critical faulty conditions for the engine and in particular the air system: they require of course service intervention but DPF regeneration process can be performed anyway (preferably along with safety settings as explained below). In this way DPF clogging may be avoided and hence avoid additional intervention at service, which means that there is no need for the forced DPF regeneration process at service.
  • a diagnostic check is performed to properly recognize whether an air system fault should drive DPF regeneration process inhibition, or if it can allow a safety DPF regeneration process.
  • This latter safety DPF regeneration process may also be called a Recovery regeneration process having dedicated safety settings.
  • said regeneration process is performed using a lower temperature set-point and employing a longer process duration with respect to the temperature set-point and duration of a conventional DPF regeneration process.
  • the intake air charge is measured and, in case such intake air charge is acceptable, a regeneration process for said Diesel Particulate Filter (DPF) is performed. Specifically measurement of the intake air charge is performed measuring intake air flow rate (MAF) and intake air pressure (p) in order to determine if these parameters are inside an acceptable range for initiating said regeneration process. If the faulty condition is critical, no DPF regeneration is performed.
  • DPF Diesel Particulate Filter
  • the determination the intake air flow rate (MAF) is performed by means of a mass air flow sensor in a inlet line of the engine and the determination the intake air pressure (p) is performed by means of a pressure sensor in the intake manifold of the engine. In this way it is possible to measure an acceptable intake air charge, in terms of intake air flow rate or in term of intake air pressure. If the intake air charge is acceptable, the DPF regeneration is allowed, preferably in a Recovery or safety mode.
  • the acceptable range of the intake air charge is not constant but is determined as a function of engine working point. That means that, depending on engine working point, expressed in term of engine load (i.e., torque, fuelling, Brake Mean Effective Pressure (BMEP)) and engine speed, intake air charge is regulated so to properly support a DPF regeneration combustion mode according to the embodiment described.
  • engine load i.e., torque, fuelling, Brake Mean Effective Pressure (BMEP)
  • BMEP Brake Mean Effective Pressure
  • faulty condition it is meant faulty conditions that may derive from the whole engine system, and in particular from engine air system.
  • a condition is defined to be critical when it causes an excessive heating of the DPF, and thus thermal stress, during the regeneration period. More precisely, the faulty condition is regarded to be critical when it causes the temperature of the DPF to exceed a threshold value.
  • non-critical faults are faults connected to variable blade turbine malfunction, would be a throttle valve blocked in an intermediate position, a variable swirl actuator blocked close, a variable swirl actuator blocked in an intermediate position or any fault on turbocharger.
  • critical faults would be an EGR valve blocked open or an EGR valve blocked in an intermediate position.
  • DPF regeneration settings are changed to perform a Recovery regeneration process depends on specific ECU strategy to perform the regeneration process: these could be, for example, temperature set-point for the regeneration and process duration.
  • a safety-mode DPF regeneration process is performed using a lower temperature set-point and employing a longer process duration with respect to the temperature set-point and duration of a conventional DPF regeneration process.
  • Temperature increase for the DPF regeneration in a safety mode are reached in a conventional manner, namely performing an After-Injection and one or more Post-Injections that reach the Diesel Oxidation Catalyst (DOC) in the exhaust line upstream the DPF where it oxidises releasing heat.
  • DOC Diesel Oxidation Catalyst

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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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US13/017,124 2010-01-29 2011-01-31 Method for managing the regeneration of a diesel particulate filter (dpf) in a diesel engine system Abandoned US20110185706A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1001446A GB2477310A (en) 2010-01-29 2010-01-29 Particle filter regeneration with a fault detection step
GB1001446.2 2010-01-29

Publications (1)

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US20110185706A1 true US20110185706A1 (en) 2011-08-04

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US (1) US20110185706A1 (zh)
CN (1) CN102140951A (zh)
GB (1) GB2477310A (zh)
RU (1) RU2565931C2 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160265413A1 (en) * 2013-10-24 2016-09-15 Robert Bosch Gmbh Method and device for monitoring a particulate filter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111322143B (zh) * 2020-02-26 2021-08-20 潍柴动力股份有限公司 柴油机颗粒捕集器的诊断方法、云端服务器及车载终端

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6594990B2 (en) * 2000-11-03 2003-07-22 Ford Global Technologies, Llc Method for regenerating a diesel particulate filter
US6962046B2 (en) * 2002-06-14 2005-11-08 Denso Corporation Exhaust gas cleaning system having particulate filter
US7169364B2 (en) * 2002-12-16 2007-01-30 Nissan Motor Co., Ltd. Particulate filter regenerating device
US7174706B2 (en) * 2004-04-05 2007-02-13 Denso Corporation Exhaust emission control system for internal combustion engine
US20080162022A1 (en) * 2006-12-28 2008-07-03 Detroit Diesel Corporation Calibratable fault reactions in heavy-duty diesel engines
US20090241513A1 (en) * 2005-10-28 2009-10-01 Corning Incorporated Regeneration of Diesel Particulate Filters
US20110072804A1 (en) * 2009-09-29 2011-03-31 Ford Global Technologies, Llc System for regenerating a particulate filter and controlling egr

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Publication number Priority date Publication date Assignee Title
DE10020170C1 (de) * 2000-04-25 2001-09-06 Emitec Emissionstechnologie Verfahren zum Entfernen von Rußpartikeln aus einem Abgas und zugehöriges Auffangelement
JP4320586B2 (ja) * 2002-11-28 2009-08-26 株式会社デンソー 内燃機関の排気浄化装置
JP4496126B2 (ja) * 2005-05-13 2010-07-07 本田技研工業株式会社 内燃機関の排ガス浄化装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6594990B2 (en) * 2000-11-03 2003-07-22 Ford Global Technologies, Llc Method for regenerating a diesel particulate filter
US6962046B2 (en) * 2002-06-14 2005-11-08 Denso Corporation Exhaust gas cleaning system having particulate filter
US7169364B2 (en) * 2002-12-16 2007-01-30 Nissan Motor Co., Ltd. Particulate filter regenerating device
US7174706B2 (en) * 2004-04-05 2007-02-13 Denso Corporation Exhaust emission control system for internal combustion engine
US20090241513A1 (en) * 2005-10-28 2009-10-01 Corning Incorporated Regeneration of Diesel Particulate Filters
US20080162022A1 (en) * 2006-12-28 2008-07-03 Detroit Diesel Corporation Calibratable fault reactions in heavy-duty diesel engines
US20110072804A1 (en) * 2009-09-29 2011-03-31 Ford Global Technologies, Llc System for regenerating a particulate filter and controlling egr

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160265413A1 (en) * 2013-10-24 2016-09-15 Robert Bosch Gmbh Method and device for monitoring a particulate filter

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Publication number Publication date
GB201001446D0 (en) 2010-03-17
GB2477310A (en) 2011-08-03
RU2011102271A (ru) 2012-07-27
CN102140951A (zh) 2011-08-03
RU2565931C2 (ru) 2015-10-20

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