EP1694953B1 - Procede de commande pour la regeneration d'un filtre a particules - Google Patents
Procede de commande pour la regeneration d'un filtre a particules Download PDFInfo
- Publication number
- EP1694953B1 EP1694953B1 EP04805796A EP04805796A EP1694953B1 EP 1694953 B1 EP1694953 B1 EP 1694953B1 EP 04805796 A EP04805796 A EP 04805796A EP 04805796 A EP04805796 A EP 04805796A EP 1694953 B1 EP1694953 B1 EP 1694953B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection
- variation
- fuel
- engine
- dilution
- 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.)
- Not-in-force
Links
Images
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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/047—Taking into account fuel evaporation or wall wetting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/18—Indicating or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
- F01M2001/165—Controlling lubricant pressure or quantity according to fuel dilution in oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/11—Oil dilution, i.e. prevention thereof or special controls according thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—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
Definitions
- the heterogeneity of combustion processes in lean-burn engines, especially in diesel engines, has the effect of generating carbon particles, which can not be burned efficiently in the engine. This is reflected for example by the appearance, at the exit of the exhaust line, black smoke. This phenomenon is a source of pollution that we are trying to reduce.
- the presence of a particulate filter in the exhaust line of the engine can significantly reduce the amount of particles, dust and other soot, emitted into the atmosphere, and meet pollution standards.
- Regeneration devices make it possible to periodically burn the particles trapped in the filter and to avoid clogging of the latter.
- Soot particles are essentially carbonaceous elements, and their combustion consumes oxygen to form carbon dioxide.
- the triggering of the regeneration of the filter is controlled by a calculator which determines whether the regeneration should take place and, when it is in progress, whether it can continue.
- the computer receives information on the operation of the vehicle. This information includes, for example, engine coolant temperatures, gases upstream and downstream of the particulate filter, vehicle speed, the soot mass accumulated in the particulate filter and the distance traveled since the last regeneration.
- the calculator checks conditions on this information and triggers regeneration only if all conditions are met. Regeneration is maintained, even if certain conditions are no longer satisfied for a duration less than a predetermined threshold, of the order of one to two minutes. If at least one condition is no longer satisfied for a period longer than said threshold, then the regeneration process is interrupted.
- the operating conditions of the engine are modified to increase the temperature of the exhaust gases before they pass through the particulate filter.
- These changes often involve fuel injection, which can be delayed for at least one engine combustion chamber.
- a post-fuel injection is performed during the final phase of the relaxation time. This last injection does not bring any additional mechanical power to the engine, but increases the temperature of the exhaust gas.
- the invention relates to a method for estimating the variation of a fuel dilution ratio in the oil of a diesel engine during operation of the engine.
- the variation of the dilution ratio is a function of the fuel injection conditions in each of the combustion chambers.
- the inventor has indeed found that the most influential parameters on the dilution of the fuel in the oil were the fuel injection conditions. Taking into account these conditions, one can best estimate the rate of fuel dilution in the oil of an engine.
- the variation of the dilution ratio is therefore a function of the following parameters: a number of injection phases in the combustion chamber for one cycle; for each injection phase, the quantity of fuel injected and the position of a piston in the combustion chamber during the injection; and the fuel supply pressure.
- a coefficient is calculated for each injection phase, the coefficient comprising a multiplicative term equal to the product of the fuel flow during said phase and the angular position of the crankshaft at the beginning of said injection phase, and a divider term. equal to the fuel supply pressure, the rate of variation of the dilution being a function of the sum of said coefficients on all the injection phases.
- the inventor has found that such coefficients could validly represent the contribution of each injection phase to the variation of the fuel dilution ratio in the oil.
- the variation in the rate dilution is calculated on a delayed injection phase whose performance is degraded compared to a normal injection, and on a post-injection phase not involved in the supply of power to the engine.
- This type of operation is frequently used to control a regeneration.
- the post-injection phase is well taken into account, unlike some evaluation methods based solely on the engine load, evaluated for example by a flow of air or air pressure on admission.
- the coefficient of the delayed injection further comprises a multiplier term equal to the rate of variation equal to the rate of change of the quantity of fuel injected between the delayed injection and the normal injection
- the coefficient of the post injection additionally comprises a multiplier term equal to the ratio of the amount of fuel injected from the post-injection and the delayed injection.
- the variation of the dilution ratio is a continuous function, zero when the sum of said coefficients on all the injection phases is less than an influence threshold, and refines beyond said influence threshold.
- the inventor found, by comparison with series of measurements, that such a function represented a valid variation in the dilution ratio.
- the invention also relates to a method for estimating a fuel dilution ratio in the oil of a diesel engine during operation of the engine, the dilution ratio being an integration over time of the variation of the dilution ratio estimated as indicated above.
- the invention also relates to a control method of a motorization system comprising an engine, a particulate filter receiving engine exhaust gas for retaining the exhaust gas particles, the information processing method and control the engine to obtain the regeneration of the particulate filter when necessary, characterized in that the method establishes an estimate of the fuel dilution ratio in the oil by the preceding method of estimating a fuel dilution ratio in the engine oil, the process allowing regeneration if the estimate of the dilution ratio is below a predetermined dilution threshold.
- a motorization system implementing the method according to the invention and represented on the figure 1 comprises a diesel engine 1 supercharged by a turbocharger 2 and whose exhaust gas is treated by a catalytic particle filter 3.
- the engine 1 is supplied with air by an air circuit comprising an air intake 11 , a compressor 12 of the turbocharger 2, a discharge pipe 13 and an intake pipe 14 opening into combustion chambers of the engine 1, a single chamber 15 being shown.
- An exhaust gas recirculation circuit comprises a quilting 18 on the exhaust pipe, a selection valve 19 directing the exhaust gas to the discharge pipe through a cooler 20 or a direct pipe 21.
- a computer 24 receives information on the operation of the motorization system and controls the engine 1. It determines in particular the conditions in which the injection of fuel into the engine is carried out. Referring to the figure 2 , a diagram of the times of the injection is represented in three different conditions. The diagram has for abscissa the angular position ⁇ of the crankshaft, the zero representing the position of the piston at the top dead center (TDC) for the chamber of combustion considered.
- the injection is performed in two stages, namely a pre-injection 51 followed by a main injection 52.
- the main injection 52 starts at a position ⁇ in of the crankshaft, usually before reaching the top dead center.
- the injection is delayed, but still comprises a pre-injection 27, followed by a main injection 28.
- the main injection 28 starts at a position ⁇ ir of the crankshaft, usually after reaching from the top dead center. If the temperature of the exhaust gas needs to be even higher, a post-injection 29 is performed. The post-injection 29 starts at a position ⁇ ip of the crankshaft.
- the computer 24 determines whether the regeneration must be controlled or not. For this, it establishes whether certain criteria are met. When all the criteria are satisfied, a regeneration control signal is delivered. The computer maintains the control signal of the regeneration for a predetermined duration after at least one criterion is no longer satisfied.
- the calculator takes into account a criterion on the dilution rate Pdil of fuel in the engine oil. The dilution rate is estimated by the calculator, and if the estimate of the Pdil dilution rate is greater than a predetermined dilution threshold Sdil, the criterion is no longer satisfied. The estimation of the dilution ratio is described below.
- an initialization step 30 the estimate of the dilution ratio Dpil is initialized either to a zero value if the oil is new or to a value previously estimated and stored.
- the test step 31 it is directed to a step 32 if no regeneration is in progress, or to a step 33 in the opposite case.
- a runoff term is calculated by the opposite of the product of a function Evapap of evaporation of the fuel contained in the oil and a time step dt.
- the Fevap function is calculated from a stored map, as a function of the rotation speed N and the fuel flow Qc.
- a derivative term is calculated by the product of a variation of the dilution ratio DQc and a time step dt.
- the variation of the dilution ratio DQc is calculated according to a method according to the invention, explained below, from the fuel injection characteristics.
- the new dilution rate Pdil (n) is calculated by adding to the dilution rate at the previous time step Pdil (n-1) the term dPdil.
- a numerical integration of the variation of the dilution ratio DQc is thus carried out.
- step 35 the dilution ratio Pdil is compared with the predetermined dilution threshold Sdil: if it is greater, the criterion is not satisfied and regeneration is prohibited (step 38). Otherwise, regeneration is allowed (step 39).
- step 40 the time step dt is awaited before proceeding to a new calculation step, resuming at step 31.
- the method according to the invention can be applied to all the combustion chambers if they are controlled in the same way, or individually if the particular injection conditions are applied only to certain combustion chambers.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Networks Using Active Elements (AREA)
- Filtration Of Liquid (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0313166A FR2862087B1 (fr) | 2003-11-10 | 2003-11-10 | Procede de commande pour la regeneration d'un filtre a particules |
PCT/FR2004/050553 WO2005047680A1 (fr) | 2003-11-10 | 2004-10-29 | Procede de commande pour la regeneration d'un filtre a particules |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1694953A1 EP1694953A1 (fr) | 2006-08-30 |
EP1694953B1 true EP1694953B1 (fr) | 2009-03-04 |
Family
ID=34508367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04805796A Not-in-force EP1694953B1 (fr) | 2003-11-10 | 2004-10-29 | Procede de commande pour la regeneration d'un filtre a particules |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1694953B1 (ko) |
JP (1) | JP4764826B2 (ko) |
KR (1) | KR20060117947A (ko) |
AT (1) | ATE424504T1 (ko) |
DE (1) | DE602004019808D1 (ko) |
FR (1) | FR2862087B1 (ko) |
WO (1) | WO2005047680A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015207287A1 (de) * | 2015-04-22 | 2016-10-27 | Ford Global Technologies, Llc | Ölsystem für einen Dieselmotor und Verfahren zum Betreiben eines Dieselmotors |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004033413A1 (de) * | 2004-07-10 | 2006-02-02 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine und Vorrichtung zur Durchführung des Verfahrens |
JP3933172B2 (ja) * | 2005-07-15 | 2007-06-20 | いすゞ自動車株式会社 | 排気ガス浄化システムの制御方法及び排気ガス浄化システム |
DE102005051924A1 (de) * | 2005-10-29 | 2007-05-03 | Ford Global Technologies, LLC, Dearborn | Online Messung von Ölverdünnungen |
JP2007162569A (ja) * | 2005-12-14 | 2007-06-28 | Nissan Motor Co Ltd | 希釈オイル再生装置及び希釈オイル再生方法 |
JP4905303B2 (ja) * | 2006-10-02 | 2012-03-28 | 日産自動車株式会社 | 内燃機関の排出ガス温度制御方法及び装置並びに内燃機関システム |
DE102006059675A1 (de) | 2006-12-18 | 2008-06-19 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Erkennung eines kontinuierlichen Kraftstoffeintrags in das Schmieröl einer Brennkraftmaschine beim Kaltstart |
FR2914945A3 (fr) * | 2007-04-13 | 2008-10-17 | Renault Sas | Procede d'estimation de la dilution de carburant dans l'huile d'un moteur a combustion interne. |
US7433776B1 (en) * | 2007-04-18 | 2008-10-07 | International Engine Intellecutal Property Company, Llc | System and method for quantizing fuel dilution of engine motor due to post-injection fueling to regenerate an exhaust aftertreatment device |
ES2390597T3 (es) * | 2007-12-05 | 2012-11-14 | Iveco Motorenforschung Ag | Procedimiento y sistema para detectar la dilución del lubricante por el combustible |
FR2926323B1 (fr) * | 2008-01-11 | 2010-01-08 | Renault Sas | Procede de gestion d'un piege a oxydes d'azote afin d'assurer un intervalle de vidange minimal |
EP2123868A1 (en) * | 2008-05-22 | 2009-11-25 | Ford Global Technologies, LLC | Method for determining oil dilution |
FR2933735B1 (fr) * | 2008-07-08 | 2011-04-29 | Peugeot Citroen Automobiles Sa | Procede et dispositif de commande des regenerations d'un systeme de post-traitement des gaz d'echappement d'un moteur a combustion |
FR2999231B1 (fr) * | 2012-12-06 | 2018-08-17 | Psa Automobiles Sa. | Controleur de commande de regeneration de filtre a particules a effet de dilution reduit |
FR3011577B1 (fr) * | 2013-10-03 | 2015-12-04 | Peugeot Citroen Automobiles Sa | Procede d'alerte au conducteur en cas de detection de dilution elevee d'un lubrifiant pour moteur de type flex fuel et calculateur moteur correspondant |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02199212A (ja) * | 1989-01-27 | 1990-08-07 | Suzuki Motor Co Ltd | 内燃機関のオイル不良検知装置 |
JPH0849584A (ja) * | 1994-08-04 | 1996-02-20 | Nippondenso Co Ltd | 内燃機関の制御装置 |
US5750887A (en) * | 1996-11-18 | 1998-05-12 | Caterpillar Inc. | Method for determining a remaining life of engine oil |
JP2001323835A (ja) * | 2000-05-15 | 2001-11-22 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
JP2002013428A (ja) * | 2000-06-30 | 2002-01-18 | Mitsubishi Motors Corp | 筒内噴射型内燃機関 |
JP2003138952A (ja) * | 2001-11-05 | 2003-05-14 | Mitsubishi Motors Corp | ディーゼル機関 |
DE10159479A1 (de) * | 2001-12-04 | 2003-06-18 | Daimler Chrysler Ag | Verfahren zum Betrieb einer Brennkraftmaschine |
JP3797278B2 (ja) * | 2002-04-26 | 2006-07-12 | トヨタ自動車株式会社 | 筒内噴射式内燃機関の燃料噴射制御装置 |
-
2003
- 2003-11-10 FR FR0313166A patent/FR2862087B1/fr not_active Expired - Fee Related
-
2004
- 2004-10-29 DE DE602004019808T patent/DE602004019808D1/de active Active
- 2004-10-29 JP JP2006538905A patent/JP4764826B2/ja not_active Expired - Fee Related
- 2004-10-29 KR KR1020067009302A patent/KR20060117947A/ko active IP Right Grant
- 2004-10-29 WO PCT/FR2004/050553 patent/WO2005047680A1/fr active Application Filing
- 2004-10-29 EP EP04805796A patent/EP1694953B1/fr not_active Not-in-force
- 2004-10-29 AT AT04805796T patent/ATE424504T1/de not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015207287A1 (de) * | 2015-04-22 | 2016-10-27 | Ford Global Technologies, Llc | Ölsystem für einen Dieselmotor und Verfahren zum Betreiben eines Dieselmotors |
DE102015207287B4 (de) | 2015-04-22 | 2017-03-09 | Ford Global Technologies, Llc | Ölsystem für einen Dieselmotor und Verfahren zum Betreiben eines Dieselmotors |
US9926820B2 (en) | 2015-04-22 | 2018-03-27 | Ford Global Technologies, Llc | Oil system for a diesel engine and method for operating a diesel engine |
Also Published As
Publication number | Publication date |
---|---|
FR2862087B1 (fr) | 2008-05-16 |
FR2862087A1 (fr) | 2005-05-13 |
JP4764826B2 (ja) | 2011-09-07 |
EP1694953A1 (fr) | 2006-08-30 |
KR20060117947A (ko) | 2006-11-17 |
ATE424504T1 (de) | 2009-03-15 |
JP2007510855A (ja) | 2007-04-26 |
WO2005047680A1 (fr) | 2005-05-26 |
DE602004019808D1 (de) | 2009-04-16 |
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