EP1207290A2 - Procédé d'optimisation de la combustion d'un moteur à combustion interne fonctionnant en auto-allumage - Google Patents
Procédé d'optimisation de la combustion d'un moteur à combustion interne fonctionnant en auto-allumage Download PDFInfo
- Publication number
- EP1207290A2 EP1207290A2 EP01402805A EP01402805A EP1207290A2 EP 1207290 A2 EP1207290 A2 EP 1207290A2 EP 01402805 A EP01402805 A EP 01402805A EP 01402805 A EP01402805 A EP 01402805A EP 1207290 A2 EP1207290 A2 EP 1207290A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion
- parameters
- slow
- fast
- optimization method
- 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- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000446 fuel Substances 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims abstract 2
- 238000005457 optimization Methods 0.000 claims 6
- 239000007789 gas Substances 0.000 description 26
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001869 rapid Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000009838 combustion analysis Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1418—Several control loops, either as alternatives or simultaneous
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1418—Several control loops, either as alternatives or simultaneous
- F02D2041/1419—Several control loops, either as alternatives or simultaneous the control loops being cascaded, i.e. being placed in series or nested
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/142—Controller structures or design using different types of control law in combination, e.g. adaptive combined with PID and sliding mode
-
- 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
- F02D2250/12—Timing of calculation, i.e. specific timing aspects when calculation or updating of engine parameter is performed
-
- 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
- F02D35/021—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using an ionic current sensor
-
- 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
- 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
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
Definitions
- the present invention relates to a method for optimizing the combustion of an internal combustion engine operating in self-ignition control.
- Self-ignition is a known phenomenon in two-stroke engines and has advantages in terms of pollutant emissions since obtains in particular low emissions of hydrocarbons and nitrogen oxides.
- Self-ignition is a phenomenon that allows combustion to be initiated by residual burnt gases which are present in the combustion chamber after combustion.
- This self-ignition is achieved by controlling the amount of gas burned residual and its mixture with the fresh gases. Residual gases, which are hot burnt gases, initiate the combustion of fresh gases through a combination of temperature and the presence of active species (radicals).
- the two-stroke engine therefore works with an internal recirculation of the burnt gases (or internal EGR) at partial load.
- Controlled self-ignition technology applied to the four engine time, is particularly interesting because it allows to operate the engine with an extremely diluted mixture, with very rich very low levels of nitrogen oxide emissions.
- the criteria to be optimized are mainly the timing of combustion in the cycle and the rate of progress of this combustion.
- combustion is not initiated by a spark whose moment of appearance can be controlled but by the evolution of the thermodynamic and chemical conditions of the mixture of air and fuel during the compression phase.
- the combustion can be stalled more or earlier in the cycle and run more or less quickly.
- WO 99/40296 has proposed a method of operation of a compression ignition engine which allows check the air / fuel ratio of the mixture present in the combustion by modification of the compression ratio by means of a member adjustable intake valve, such as the intake valve usually such an engine.
- the present invention provides a method of optimizing combustion which allows to take into account certain parameters necessary to obtain ideal combustion and their specific response times.
- slow parameters have a longer response time as long as the quick settings.
- the response time of the quick parameters is at most equal to the duration of a determined number of combustion cycles.
- the parameters to be adjusted are determined by comparison of a benchmark for ideal combustion contained in the unit and the processing of signals sent by at least one detector the state of combustion
- the signals come from a detector of the state of combustion and / or a knock sensor and / or a pressure.
- the processing unit corrects the parameters slow so that the quick parameters remain within limit values.
- the process of control allows corrections to be made automatically to certain slow parameters, such as gas recirculation burned, so that variations in the quick parameters remain within acceptable and predefined limit values (such as the opening time and valve closing in the case of a type of distribution electromechanical or electro-hydraulic.)
- the internal combustion engine 10 comprises a cylinder block fitted with four cylinders 12 forming with the piston and the cylinder head (not shown) a combustion chamber 14.
- At least one orifice is provided for each combustion chamber 14 inlet fitted with a valve 16 whose opening and closing are controlled by an intake actuator 18 and at least one orifice exhaust fitted with a valve 20 controlled by an actuator exhaust 22.
- the actuators 18 and 22 are of the electromechanical type or electrohydraulic whose response time is on the scale of the engine cycle but can be of the mechanical type with a continuous variation of the lift and / or the angular phasing of the valves which can have a time of scale response of a few cycles.
- the fuel injection is an injection indirect, i.e. this fuel is injected upstream of the valve intake 16 by an injector 24 provided with its injection actuator.
- Flow control means are also provided in the orifices intake and exhaust which, in the example described, are valves 32, 34 controlled by flow actuators 36, 38.
- a combustion state detector 40 which, for example is a ion current detector for measuring conductivity electric combustion gas, is arranged in the combustion and which makes it possible to continuously measure the progress of the combustion.
- a pressure detector 42 which will measure the pressure prevailing in the combustion chamber, can also be used as a medium combustion analysis and can possibly be used in parallel of detector 40.
- the motor can also carry a detector 44 intended to measure the amplitude vibrations generated during unwanted combustions in the case rattling.
- a processing unit 46 will thus assess the state of combustion and its evolution as a function of the signal received from the combustion state detector 40 and / or the knock sensor 44 and / or the pressure sensor 42.
- this processing unit will receive by logic unit 48 engine operation information such as rpm medium and instantaneous, air flow, air / fuel ratio, gas flow burnt external recirculated, valve liftings and shims, coolant temperature, oil temperature, intake air temperature.
- engine operation information such as rpm medium and instantaneous, air flow, air / fuel ratio, gas flow burnt external recirculated, valve liftings and shims, coolant temperature, oil temperature, intake air temperature.
- control signals are sent by this unit to the different actuators 18, 22, 24, 30, 36 and 38 in order to obtain in the combustion chamber, for the following cycles, the conditions for ideal combustion of the air and fuel mixture.
- the processing unit 46 will thus receive, at the start of the combustion cycle, signals from at least minus a detector 40, 42, 44.
- the unit 46 will process these signals and determine, based on a benchmark contained in its regulatory logic, the combustion parameters which must be modified to obtain an ideal combustion state.
- the unit 46 fall into two categories: slow PL parameters and parameters fast PR.
- this unit will be brought, depending on the state of the combustion, to have no parameters to classify in one or other of the categories.
- the unit 46 will only have to manage quick parameters or only slow settings.
- Slow parameters are parameters whose response time is higher than other parameters.
- response time must be understood as either the response time of the adjustment actuators which are associated with parameters they control, either as the time required to obtain the actual modification of the parameter considered in the combustion.
- the rapid parameters PR are those whose time of response is less than or equal to the duration of a specified number of cycles of combustion while the slow parameters PL are those whose time of response is greater than the duration of this number of cycles, this number ranging from 1 to 2.
- the quick parameters are the report air / fuel controlled by injector 24, the admitted air mass and the internal aerodynamics regulated by the valve control thanks to the valve actuators 18, 22.
- Slow parameters include the inlet pressure managed by the intake flow actuator 36 and the valve 32, the back pressure controlled by the exhaust flow actuator 38 and the valve 34, the dilution of the fuel air mixture by the external burnt gases managed by the burnt gas actuator 30 and its valve 28.
- the unit 46 will manage these parameters.
- the unit will manage the adjustment of these parameters by a control loop comprising this unit, the adjustment actuator associated with the parameter to be modified and the detector (s) allowing know the state of combustion.
- the unit 46 will send a control signal to the actuator for adjusting the parameter in question, such as the actuator controlling the fuel injection 24 then the detector 40 and / or 42 and / or 44 will control the combustion process and send a signal to the unit 46 who will treat him.
- the actuator for adjusting the parameter in question, such as the actuator controlling the fuel injection 24
- the detector 40 and / or 42 and / or 44 will control the combustion process and send a signal to the unit 46 who will treat him.
- this unit 46 will manage the slow parameters through the servo loop and send signals from commands to a part of the actuators to control the adjustment of slow parameters PL, such as the burnt gas actuator 30 which will act on the valve 28 so as to modify the rate of burnt gases which will be directed to the intake opening and thus modify the dilution of these gases in the mixture of carburetted air present in the combustion chamber.
- slow parameters PL such as the burnt gas actuator 30 which will act on the valve 28 so as to modify the rate of burnt gases which will be directed to the intake opening and thus modify the dilution of these gases in the mixture of carburetted air present in the combustion chamber.
- the unit 46 will manage the control of the actuators of setting of quick parameters PR also by a loop control and taking into account the influence on combustion of the control of slow parameters PL.
- the unit 46 will control part of the actuators for adjusting the quick parameters PR, such as for example the intake actuator 18 acting on the inlet valve 16 in such a way that this compensates for insufficient adjustment of slow parameters and thus obtaining the desired combustion.
Landscapes
- 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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
- on détermine plusieurs paramètres à ajuster pour optimiser la combustion ;
- on classe lesdits paramètres en paramètres rapides et en paramètres lents ;
- on gère les paramètres rapides par une boucle d'asservissement spécifique auxdits paramètres et on gère les paramètres lents par une boucle d'asservissement spécifique aux paramètres lents pour obtenir la combustion souhaitée pour les cycles suivants.
Claims (7)
- Procédé d'optimisation de la combustion d'un moteur à combustion interne fonctionnant à auto-allumage contrôlé dans lequel on mesure l'état de la combustion d'un mélange air/carburant dans la chambre de combustion (14) et, après traitement des signaux de mesure envoyés à une unité de traitement (46), on ajuste au moins un paramètre de contrôle de la combustion pour obtenir la combustion désirée pour les cycles suivants, caractérisé en ce que :on détermine plusieurs paramètres à ajuster pour optimiser la combustion ;on classe lesdits paramètres en paramètres rapides (PR) et en paramètres lents (PL) ;on gère les paramètres rapides (PR) par une boucle d'asservissement spécifique auxdits paramètres et on gère les paramètres lents (PL) par une boucle d'asservissement spécifique aux paramètres lents pour obtenir la combustion souhaitée pour les cycles suivants.
- Procédé d'optimisation de la combustion selon la revendication 1, caractérisé en ce que :on commande les paramètres lents (PL);et on commande les paramètres rapides (PR) en prenant en compte la commande des paramètres lents (PL).
- Procédé d'optimisation de la combustion selon la revendication 1 ou 2, caractérisé en ce que les paramètres lents (PL) ont un temps de réponse plus long que les paramètres rapides (PR)
- Procédé d'optimisation de la combustion selon la revendication 3, caractérisé en ce que le temps de réponse des paramètres rapides (PR) est au plus égal à la durée d'un nombre déterminé de cycles de combustion.
- Procédé d'optimisation de la combustion selon l'une des revendications précédentes, caractérisé en ce que les paramètres à ajuster sont déterminés par comparaison d'un référentiel pour une combustion idéale contenu dans l'unité (46) et du traitement de signaux envoyés par au moins un détecteur (40, 42, 44) de l'état de la combustion
- Procédé d'optimisation de la combustion selon la revendication 5, caractérisé en ce que les signaux proviennent d'un détecteur de l'état de combustion (40) et/ou d'un détecteur de cliquetis (44) et/ou d'un détecteur de pression (42).
- Procédé d'optimisation de la combustion selon l'une des revendications précédentes, caractérisé en ce que l'unité de traitement (46) corrige les paramètres lents (PL) afin que les paramètres rapides (PR) restent dans des valeurs limites.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0015040 | 2000-11-20 | ||
| FR0015040A FR2816989B1 (fr) | 2000-11-20 | 2000-11-20 | Procede d'optimisation de la combustion d'un moteur a combustion interne fonctionnant en auto-allumage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1207290A2 true EP1207290A2 (fr) | 2002-05-22 |
| EP1207290A3 EP1207290A3 (fr) | 2007-11-21 |
Family
ID=8856733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01402805A Withdrawn EP1207290A3 (fr) | 2000-11-20 | 2001-10-30 | Procédé d'optimisation de la combustion d'un moteur à combustion interne fonctionnant en auto-allumage |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6543418B2 (fr) |
| EP (1) | EP1207290A3 (fr) |
| JP (1) | JP2002195062A (fr) |
| FR (1) | FR2816989B1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2923294A1 (fr) * | 2007-11-05 | 2009-05-08 | Renault Sas | Procede de detection de combustion anormale |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7367319B2 (en) * | 2005-11-16 | 2008-05-06 | Gm Global Technology Operations, Inc. | Method and apparatus to determine magnitude of combustion chamber deposits |
| JP4276241B2 (ja) * | 2006-05-11 | 2009-06-10 | 株式会社日立製作所 | エンジンの制御装置 |
| US8924125B2 (en) | 2011-03-31 | 2014-12-30 | Robert Bosch Gmbh | Perturbing engine performance measurements to determine optimal engine control settings |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999040296A1 (fr) | 1998-02-07 | 1999-08-12 | Daimlerchrysler Ag | Procede permettant de faire fonctionner un moteur a combustion interne a quatre temps |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4232643A (en) * | 1976-11-22 | 1980-11-11 | Fuel Injection Development Corporation | Charge forming system for maintaining operation of an internal combustion engine at its lean limit |
| DE2939580A1 (de) * | 1979-09-29 | 1981-04-09 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren zur regelung des zuendzeitpunktes |
| GB2141259A (en) * | 1983-06-03 | 1984-12-12 | Ford Motor Co | Automatic control of i.c. engines |
| US5535722A (en) * | 1994-06-27 | 1996-07-16 | Ford Motor Company | Knock detection system and control method for an internal combustion engine |
| DE19630213C1 (de) * | 1996-07-26 | 1997-07-31 | Daimler Benz Ag | Verfahren und Vorrichtung zur Motormomenteinstellung bei einem Verbrennungsmotor |
| DE19807126C2 (de) * | 1998-02-20 | 2000-11-16 | Daimler Chrysler Ag | Verfahren zur Einstellung der Antriebsleistung eines Kraftfahrzeuges |
| FR2790516B1 (fr) * | 1999-03-01 | 2001-05-11 | Renault | Procede de commande d'un moteur a combustion interne |
-
2000
- 2000-11-20 FR FR0015040A patent/FR2816989B1/fr not_active Expired - Fee Related
-
2001
- 2001-10-30 EP EP01402805A patent/EP1207290A3/fr not_active Withdrawn
- 2001-11-16 US US09/987,847 patent/US6543418B2/en not_active Expired - Fee Related
- 2001-11-20 JP JP2001354607A patent/JP2002195062A/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999040296A1 (fr) | 1998-02-07 | 1999-08-12 | Daimlerchrysler Ag | Procede permettant de faire fonctionner un moteur a combustion interne a quatre temps |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2923294A1 (fr) * | 2007-11-05 | 2009-05-08 | Renault Sas | Procede de detection de combustion anormale |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2816989A1 (fr) | 2002-05-24 |
| US20020059918A1 (en) | 2002-05-23 |
| JP2002195062A (ja) | 2002-07-10 |
| FR2816989B1 (fr) | 2003-05-16 |
| EP1207290A3 (fr) | 2007-11-21 |
| US6543418B2 (en) | 2003-04-08 |
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