EP1647692A1 - Ansaugluftsteuerverfahren für eine Brennkraftmaschine und Kraftfahrzeug zur Anwendung dieses Verfahrens - Google Patents

Ansaugluftsteuerverfahren für eine Brennkraftmaschine und Kraftfahrzeug zur Anwendung dieses Verfahrens Download PDF

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Publication number
EP1647692A1
EP1647692A1 EP05292131A EP05292131A EP1647692A1 EP 1647692 A1 EP1647692 A1 EP 1647692A1 EP 05292131 A EP05292131 A EP 05292131A EP 05292131 A EP05292131 A EP 05292131A EP 1647692 A1 EP1647692 A1 EP 1647692A1
Authority
EP
European Patent Office
Prior art keywords
engine
gas
admitted
total mass
measuring
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.)
Withdrawn
Application number
EP05292131A
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English (en)
French (fr)
Inventor
Cédric Lorret
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
Publication of EP1647692A1 publication Critical patent/EP1647692A1/de
Withdrawn legal-status Critical Current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
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder 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
    • 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
    • F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
    • 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
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/703—Atmospheric 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
    • F02D41/0002—Controlling intake air
    • F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2412—One-parameter addressing technique
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2474—Characteristics of sensors

Definitions

  • the invention relates to a method of regulating an intake system of an internal combustion engine, and to a motor vehicle comprising an internal combustion engine and means implementing this method.
  • the quantity of air admitted into the combustion chamber or chambers of the engine determines the emissions and the torque supplied by the engine.
  • the air mass admitted, per operating cycle, in each of the combustion chambers determines the emissions and the torque supplied by the engine.
  • a filling map possibly associated with a boost pressure sensor in the presence of a turbocharger or a compressor.
  • fresh air is added to a percentage of the engine exhaust gases that are recirculated or recirculated to the inlet of the combustion chamber or chambers to limit the emissions of toxic gases.
  • mitted gases denotes indifferently fresh air alone and fresh air mixed with a recirculated portion of the exhaust gas, whatever their volume ratio, intended to be admitted. in one or more combustion chambers of an internal combustion engine.
  • This designation also goes along with the object of the invention according to which the gas admission system is regulated on the basis of an estimate of the total mass of the gases admitted to the chambers of gas. combustion of an internal combustion engine, unable to directly measure the mass of recirculated gas.
  • the motors to which the present invention is more particularly applicable are compression ignition engines. However, the invention can also be applied to spark ignition engines.
  • This estimation method only applies to engines that do not have an exhaust gas recirculation system.
  • This estimation method applies only to spark ignition engines without exhaust gas recirculation.
  • US-A-005245969 discloses a method for controlling the injection and ignition timing parameters in an internal combustion engine from the evaluation of the filling on the basis of the signal of a pressure sensor of the combustion chamber. This method ignores an air flow meter and therefore does not seem applicable to a supercharged engine and provided with an exhaust gas recirculation device.
  • US-A-006167755 discloses a method for estimating the air load admitted into an internal combustion engine. The estimate is made from the pressure measurement in a combustion chamber at two predetermined angular positions of the crankshaft. This process seems unsuited to the operation of a supercharged engine and provided with an exhaust gas recirculation device.
  • the air mass actually admitted into the combustion chambers may vary with respect to this estimated value as a function of load losses between the intake manifold and the combustion chambers. These load losses may vary from one type of engine to another due to manufacturing tolerances, and may vary over the life of the engine. motor due to clogging of the combustion chambers and the resulting change in volumetric efficiency of the engine.
  • the information provided by this flowmeter is likely to be shifted in time with respect to the quantities present in the combustion chambers. This offset is due to the transport time of an air mass considered between the inlet of the supply system and the combustion chamber. In addition, there are air compression effects through the complete intake system.
  • the object of the invention is to provide a method, and means for its implementation, to overcome the disadvantages of known methods.
  • the method of the invention must be applicable to any type of internal combustion engine and more particularly to a compression ignition engine, supercharged and with recirculation of exhaust gas.
  • the object of the invention is achieved with a method of regulating an intake system of an internal combustion engine, which comprises a step of estimating the total mass of gas admitted into combustion chambers of the engine according to an estimation method set out below, a fresh air flow measurement step and a step of introducing the estimated total gas mass and the fresh air flow rate measured as input values in a regulator intended for regulate the intake system.
  • the object of the invention is also achieved with a motor vehicle comprising an internal combustion engine provided with an intake gas manifold, intake valves intended to allow the passage of the intake gases to combustion chambers.
  • the engine as well as pistons for varying the pressure of the gases in the combustion chambers of the engine, the position of the pistons being determined using means measuring the angular position of a crankshaft to which the pistons are connected, as well as means for measuring the pressure of the gases in at least one combustion chamber of the engine, means for measuring the flow of fresh air, storage means , modeling or calculation of a value of gas flow admitted into a combustion chamber as a function of a pressure variation in the combustion chamber, and storage and calculation means connected to the pressure measuring means in the at least one combustion chamber, the means for measuring the flow of fresh air and the means for measuring the angular position of the crankshaft, the storage and calculation means being shaped to implement the regulation method stated herein. before.
  • the present invention is based on an estimation of the total flow rate of the gases admitted into combustion chambers of an internal combustion engine, that is to say on an estimate of the total flow rate of the admitted gases, that these gases are solely of fresh air or a mixture of air fresh with a percentage of recirculated exhaust gas.
  • the method of the invention relies on an estimation based on parameters of the operation of the engine, which are determined during the development of the engine, that is to say that are measured, mapped or modeled.
  • Estimating the total flow rate of gases admitted to the combustion chambers of the engine requires the presence of at least one pressure sensor in at least one of the combustion chambers of the internal combustion engine. This estimation also requires the presence of means for measuring the angular position of a crankshaft to which pistons of the combustion chambers are attached. Indeed, in order to be able to estimate the total gas flow rate with the greatest possible accuracy, the pressure in a given combustion chamber is measured after the closure of the exhaust valve and before the start of the combustion. at least two different angular positions of the crankshaft, which corresponds to at least two different positions of the piston in the combustion chamber and hence to at least two different volumes of the combustion chamber.
  • a linear relationship is used linking the total flow rate of the gases and n pressure variations in a given combustion chamber, measured between a reference angular position and n angular positions considered in the intake and output phases. / or compression of the combustion chamber. n is of course greater than or equal to 1.
  • FIG. 1 illustrates, in the form of two graphs, a pressure profile in a given combustion chamber, measured during the compression phase (left graph) and the linear relationship linking the total gas flow rate and the sum of variations in pressure in the combustion chamber considered according to the angular positions of the crankshaft.
  • the different angular positions are referenced ⁇ MES for a position of measure from n possible positions, MES ranging from 1 to n, and ⁇ ref for the reference position.
  • the difficulty in determining the regression slope lies in the fact that this coefficient depends on the temperature of the gases admitted to the combustion chamber. And, as noted above, the temperature of the gases admitted depends strongly on the changes in the rate (or percentage) of recirculated exhaust gas.
  • the temperature in the intake manifold can be measured by a specific sensor. But it can also be estimated on the basis of an engine exhaust temperature map from the other operating parameters of the engine and a heat exchange model in a cooler in which the recirculated exhaust gas passes.
  • the decision for one or other of the ways to determine the temperature of the intake manifold ie the decision to use a measured manifold temperature or for the use of a estimated collector temperature, is taken depending on the type of engine, all the instruments and sensors that can be implemented and the risk of drift or dispersion of the various sensors and the characteristics of the components of the intake system.
  • the total mass of gas admitted into combustion chambers of an internal combustion engine is estimated by firstly predetermining a series of gas flow values admitted to a combustion chamber as a function of a pressure variation in a combustion chamber. the combustion chamber, by measuring one or more pressure values in one or more combustion chambers of the engine and then calculating the pressure variation (s) relative to a reference pressure, and then estimating the total mass of admitted gas in all of the combustion chambers of the engine from the calculated pressure change (s) and on the basis of the set of predetermined gas flow values.
  • the total mass of admitted gas thus estimated is advantageously corrected taking into account the temperature of the gases admitted, whether this temperature is measured or estimated as described above.
  • the gas intake system is regulated, when it comprises a turbocharger for supercharging the combustion chambers, by acting on the engine.
  • turbocharger and a valve for varying the percentage of recirculated exhaust gas, and, in some engines, a metering butterfly for passing a portion of the intake gas in an exchanger to change their temperature.
  • the intake system regulating means receive as input the flow rate of fresh air measured by the flowmeter and the total flow rate of the admitted gases, estimated according to the method of the invention described above. This method is advantageous because the fresh air flow rate and the total gas flow rate are known with good accuracy.
  • the fresh air flow meter does not drift or, at least, that any drift from this flowmeter does not falsify the estimates of the fresh air mass admitted to the engine's combustion chambers, proceeds, in predetermined intervals, regular or irregular, to a reset of the fresh air flowmeter.
  • This adjustment is preferably performed when the operating conditions of the engine that the rate of recirculated exhaust gas admitted is zero. These conditions are fulfilled, for example, when the engine is running at full load, during deceleration and during prolonged idling.
  • the engine is advantageously provided with means for detecting conditions that are favorable for resetting the air flow meter.
  • the flow of air admitted into the combustion chambers can be reduced temporarily when it does not degrade the motor operation (for example in deceleration), by means of an active winnowing on admission and without exhaust gas recirculation.
  • FIG. 2 represents, in a block diagram of general operation, the regulation obtained by means of the regulation method described above.
  • the various means contributing to the implementation of the method of the invention arise on the one hand from the fresh air flow meter whose measurement values are introduced into mapping means to correct the values of the flow meter, the result being sent as data representing the flow of fresh air, by means of internal combustion engine intake system regulations.
  • the input values originate in the pressure sensor or sensors of which one or more or all combustion chambers of the internal combustion engine are provided.
  • the sensor signal, or the signals of the sensors are introduced into a means for calculating and estimating the total mass of admitted gas, means which are also introduced with data representing the engine speed, the angular positions of the crankshaft, the permissible gas temperature and the temperature of the engine cooling water and, if necessary, further data.
  • the calculation and estimation means send signals on the one hand to the regulating means of the intake system and, on the other hand, to means for resetting the flowmeter in order to carry out a resetting of the flowmeter under the conditions described above and to correct the mapping of the flowmeter, so that the corrections that these mapping means provide to the data from the fresh air flowmeter are correctly updated.
  • the admission system regulating means receive data representing the engine load, the fresh air intake temperature, the engine cooling water temperature and, where appropriate, other control parameters.
  • the regulating means calculate and send instructions to the means intended to act on the turbocharger, setpoint signals intended to act on the means intended to vary the rate of the recirculated exhaust gases, setpoint signals to the means for varying the flow rate of the intake air and, where appropriate, other setpoint signals, to additional means for acting on elements necessary to ensure the optimal operation of the combustion engine internal.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP05292131A 2004-10-18 2005-10-12 Ansaugluftsteuerverfahren für eine Brennkraftmaschine und Kraftfahrzeug zur Anwendung dieses Verfahrens Withdrawn EP1647692A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0411005A FR2876739B1 (fr) 2004-10-18 2004-10-18 Procede de regulation d'un systeme d'admission d'un moteur a combustion interne et vehicule automobile mettant en oeuvre ce procede

Publications (1)

Publication Number Publication Date
EP1647692A1 true EP1647692A1 (de) 2006-04-19

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EP05292131A Withdrawn EP1647692A1 (de) 2004-10-18 2005-10-12 Ansaugluftsteuerverfahren für eine Brennkraftmaschine und Kraftfahrzeug zur Anwendung dieses Verfahrens

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EP (1) EP1647692A1 (de)
FR (1) FR2876739B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2904661A1 (fr) * 2006-08-07 2008-02-08 Renault Sas Procede d'estimation du debit de gaz entrant dans un moteur.
WO2008043933A1 (fr) * 2006-10-11 2008-04-17 Renault S.A.S. Systeme et procede de controle du fonctionnement d'un moteur a combustion interne avec compensation des erreurs de la mesure de debit d'air admis
FR3054603A1 (fr) * 2016-07-29 2018-02-02 Continental Automotive France Procede de correction de la mesure d'un debitmetre dans un moteur a combustion interne

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359975A (en) * 1991-12-06 1994-11-01 Mitsubishi Denki Kabushiki Kaisha Control system for internal combustion engine
EP0791736A2 (de) * 1996-01-25 1997-08-27 Toyota Jidosha Kabushiki Kaisha Steuergerät für Abgasrückführungssystem für Dieselbrennkraftmaschine
FR2813343A1 (fr) * 2000-08-22 2002-03-01 Bosch Gmbh Robert Procede de compensation de variations defectueuses de debit de gaz dans une conduite de reinjection des gaz d'echappement d'un moteur a combustion interne
FR2835281A1 (fr) * 2002-01-25 2003-08-01 Peugeot Citroen Automobiles Sa Procede d'estimation de la masse d'air admise dans une chambre de combustion d'un moteur, et vehicule de mise en oeuvre
US6715287B1 (en) * 1999-12-28 2004-04-06 Robert Bosch Gmbh Method and device for controlling an internal combustion engine that is provided with an air system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678684B1 (fr) 1991-07-02 1995-01-06 Renault Procede et systeme de calcul de la masse d'air frais dans un cylindre de moteur a combustion interne.
JP2855923B2 (ja) 1991-11-06 1999-02-10 三菱電機株式会社 エンジン制御装置およびエンジン制御方法
US6167755B1 (en) 1993-12-14 2001-01-02 Robert Bosch Gmbh Device for determining load in an internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359975A (en) * 1991-12-06 1994-11-01 Mitsubishi Denki Kabushiki Kaisha Control system for internal combustion engine
EP0791736A2 (de) * 1996-01-25 1997-08-27 Toyota Jidosha Kabushiki Kaisha Steuergerät für Abgasrückführungssystem für Dieselbrennkraftmaschine
US6715287B1 (en) * 1999-12-28 2004-04-06 Robert Bosch Gmbh Method and device for controlling an internal combustion engine that is provided with an air system
FR2813343A1 (fr) * 2000-08-22 2002-03-01 Bosch Gmbh Robert Procede de compensation de variations defectueuses de debit de gaz dans une conduite de reinjection des gaz d'echappement d'un moteur a combustion interne
FR2835281A1 (fr) * 2002-01-25 2003-08-01 Peugeot Citroen Automobiles Sa Procede d'estimation de la masse d'air admise dans une chambre de combustion d'un moteur, et vehicule de mise en oeuvre

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2904661A1 (fr) * 2006-08-07 2008-02-08 Renault Sas Procede d'estimation du debit de gaz entrant dans un moteur.
WO2008017771A1 (fr) * 2006-08-07 2008-02-14 Renault S.A.S. Procede d'estimation du debit de gaz entrant dans un moteur
WO2008043933A1 (fr) * 2006-10-11 2008-04-17 Renault S.A.S. Systeme et procede de controle du fonctionnement d'un moteur a combustion interne avec compensation des erreurs de la mesure de debit d'air admis
FR2907169A1 (fr) * 2006-10-11 2008-04-18 Renault Sas Systeme et procede de controle du fonctionnement d'un moteur a combustion interne avec compensation des derives et des dispersions de la mesure de debit d'air admis
FR3054603A1 (fr) * 2016-07-29 2018-02-02 Continental Automotive France Procede de correction de la mesure d'un debitmetre dans un moteur a combustion interne

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Publication number Publication date
FR2876739B1 (fr) 2009-11-13
FR2876739A1 (fr) 2006-04-21

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