FR2840361A1 - Method for tuning supply to two fuel engine comprises, during switching supply between fuels, of switching cylinders' supply fraction, determining second fuel corrective supply coefficient and applying to second fuel fraction - Google Patents

Method for tuning supply to two fuel engine comprises, during switching supply between fuels, of switching cylinders' supply fraction, determining second fuel corrective supply coefficient and applying to second fuel fraction Download PDF

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Publication number
FR2840361A1
FR2840361A1 FR0206479A FR0206479A FR2840361A1 FR 2840361 A1 FR2840361 A1 FR 2840361A1 FR 0206479 A FR0206479 A FR 0206479A FR 0206479 A FR0206479 A FR 0206479A FR 2840361 A1 FR2840361 A1 FR 2840361A1
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Prior art keywords
fuel
supply
fraction
cylinders
switching
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Granted
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FR0206479A
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French (fr)
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FR2840361B1 (en
Inventor
Jacques Honvault
Nicolas Brice
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Johnson Controls Automotive Electronics SAS
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Johnson Controls Automotive Electronics SAS
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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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0082—Controlling each cylinder individually per groups or banks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0602—Control of components of the fuel supply system
    • F02D19/0607—Control of components of the fuel supply system to adjust the fuel mass or volume flow
    • F02D19/061—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0602—Control of components of the fuel supply system
    • F02D19/0613—Switch-over from one fuel to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0626—Measuring or estimating parameters related to the fuel supply system
    • F02D19/0634—Determining a density, viscosity, composition or concentration
    • F02D19/0636—Determining a density, viscosity, composition or concentration by estimation, i.e. without using direct measurements of a corresponding sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Abstract

The tuning method comprises, during switching the supply between first and second fuels, of switching the supply of a fraction of the engine's cylinders. A corrective coefficient of a supply parameter of the second fuel of the cylinders' fraction is determined in order make this parameter comply with a corresponding reference parameter of the engine during supply of the engine with the first fuel. The corrective coefficient is then applied to the second fuel of the cylinders' fraction.

Description

base d'une periode d'arret du moteur a combustion interne.base of an internal combustion engine shutdown period.

La presente invention concerne un procede de re glage de l'alimentation d'un moteur pouvant fonctionner avec deux carburants, notamment, bien que non exclusive  The present invention relates to a method for adjusting the power supply of an engine that can operate on two fuels, in particular, although not exclusive

ment, un carburant liquide et un carburant gazeux.  liquid fuel and gaseous fuel.

Les injecteurs de carburant liquide dont la tech nologie a ete mise au point au cours de tres nombreuses annees vent en general tres precis et peuvent etre reali ses pour presenter une faible dispersion de fonctionne  Liquid fuel injectors, the technology of which has been developed over many years, are generally very precise and can be produced to present a low operating dispersion.

ment d'un injecteur a l'autre.ment from one injector to another.

En outre, il est connu de determiner et d'appliquer a ltensemble des injecteurs d'un moteur un coefficient global de correction de la commande d'ouverture des injecteurs de carburant liquide de sorte que le melange air/carburant liquide soit sensiblement  In addition, it is known to determine and apply to all of the injectors of an engine a global correction coefficient for the opening command of the liquid fuel injectors so that the air / liquid fuel mixture is substantially

dans des proportions stchiometriques.  in stchiometric proportions.

Par ailleurs, certains injecteurs de carburant gazeux, notamment les injecteurs a membrane, presentent des dispersions de fabrication qui les rendent en general  In addition, certain gaseous fuel injectors, in particular membrane injectors, have manufacturing dispersions which generally make them

moins precis que les injecteurs de carburant liquide.  less precise than liquid fuel injectors.

De meme que pour les injecteurs de carburant li quide, il est connu de commander l'ouverture des injec teurs gazeux en appliquant a tous les injecteurs un meme  As with the liquid fuel injectors, it is known to control the opening of the gas injectors by applying to all of the injectors the same

coefficient global de correction.overall correction coefficient.

Neanmoins, etant donne ['imprecision relative des injecteurs de carburant gazeux, ce procede ne permet pas de garantir une injection de carburant gazeux dans des proportions stchiometriques avec l'air admis dans chacun des cylindres. En raison de cette imprecision, le fonc tionnement avec un carburant gazeux ntest pas optimum en termes de reduction des emissions polluantes, de fiabili  However, given the relative imprecision of the gaseous fuel injectors, this process does not guarantee an injection of gaseous fuel in stchiometric proportions with the air admitted into each of the cylinders. Due to this imprecision, operation with a gaseous fuel is not optimal in terms of reducing polluting emissions, reliability

te et d'agrement de conduite.te and driving pleasure.

En vue de remedier a cette situation, on propose, selon l' invention, un procede de reglage de l'alimentation d'un moteur pouvant fonctionner avec un premier carburant et un second carburant, comportant, lors d'une commutation de l'alimentation entre le premier carburant et le second carburant, les etapes de: - commuter l'alimentation d'une fraction des cy lindres du moteur; - determiner un coefficient correctif d' au moins un parametre de l'alimentation en second carburant de la fraction des cylindres pour mettre ce parametre en con formite avec un parametre de reference correspondent du moteur lors d'une alimentation du moteur en premier car burant. Ainsi, en prenant comme reference le parametre de fonct ionnement du moteur selon une al imentat ion en pre mier carburant, qui a pu etre reglee avec une grande pre cision et presente une faible dispersion de reglage, comme par exemple un carburant liquide, on transfert cette precision a l'alimentation en second carburant pour la fraction des cylindres correspondents, de sorte que meme si l'alimentation en second carburant, par exemple un carburant gazeux, presente une moindre precision ini  In order to remedy this situation, there is provided, according to the invention, a method of adjusting the supply of an engine capable of operating with a first fuel and a second fuel, comprising, during a switching of the supply between the first fuel and the second fuel, the steps of: - switching the supply of a fraction of the cylinders of the engine; - determine a corrective coefficient for at least one parameter of the supply of second fuel to the fraction of the cylinders in order to bring this parameter into conformity with a corresponding reference parameter of the engine when the engine is first fueled. Thus, taking as a reference the operating parameter of the engine according to a first fuel supply, which could be adjusted with great precision and has a low adjustment dispersion, such as for example a liquid fuel, we transfer this precision in the supply of second fuel for the fraction of the corresponding cylinders, so that even if the supply of second fuel, for example a gaseous fuel, has a lower precision ini

tiale, le fonctionnement du moteur est ameliore.  engine operation is improved.

Selon une version avantageuse de l' invention, la determination du coefficient correctif est effectuee suc cessivement pour differentes fractions des cylindres. Il est ainsi possible d'amener ['ensemble des injecteurs du second carburant a une precision equivalente a celle des  According to an advantageous version of the invention, the determination of the corrective coefficient is carried out successively for different fractions of the cylinders. It is thus possible to bring the set of injectors of the second fuel to a precision equivalent to that of the

injecteurs du premier carburant.first fuel injectors.

De preference, le coefficient correctif est memo rise. Il est ainsi possible d'appliquer le coefficient correctif lors d'une commutation ulterieure de l'alimentation depuis le premier carburant vers le second carburant sans qu'il soit necessaire de proceder a une  Preferably, the corrective coefficient is memo rise. It is thus possible to apply the corrective coefficient during a subsequent switching of the supply from the first fuel to the second fuel without it being necessary to carry out a

nouvelle determination du coefficient correctif.  new determination of the correction coefficient.

Selon un mode de mise en muvre prefere du procede selon l' invention, apres determination du coefficient correctif lors d'une commutation de l'alimentation d'une fraction des cylindres depuis le premier carburant vers le second carburant, l'alimentation de la fraction des cylindres est commutee en retour du second carburant vers  According to a preferred embodiment of the method according to the invention, after determination of the corrective coefficient during a switching of the supply of a fraction of the cylinders from the first fuel to the second fuel, the supply of the fraction cylinders is switched back from the second fuel to

le premier carburant et le procede est ensuite mis en u-  the first fuel and the process is then used

vre en relation avec une nouvelle fraction des cylindres. On s'assure ainsi que la determination du coefficient correctif est effectuee dans les memes conditions pour  vre in relation to a new fraction of the cylinders. This ensures that the determination of the corrective coefficient is carried out under the same conditions for

tous les cylindres.all cylinders.

De preference, apres determination du coefficient correctif pour differentes fractions des cylindres, l'alimentation de tous les cylindres est commutee vers le  Preferably, after determining the corrective coefficient for different fractions of the cylinders, the supply of all the cylinders is switched to the

carburant second en appliquant les coefficients correc-  second fuel by applying the corrected coefficients

tifs memorises.memorized tifs.

D'autres caracteristiques et avantages de  Other features and benefits of

l' invention apparaitront a la lecture de la description  the invention will appear on reading the description

qui suit d'un mode de mise en oeuvre particulier non li-  which follows from a particular, unrelated mode of implementation

mitatif de ['invention.mitative of the invention.

Le procede selon l' invention est decrit en rela-  The process according to the invention is described in relation

tion avec un moteur ayant un circuit d'alimentation com  tion with a motor having a com supply circuit

prenant pour chacun des cylindres un injecteur de carbu-  taking for each of the cylinders a fuel injector

rant liquide et un injecteur de carburant gazeux. On fait tout d'abord fonctionner le moteur en alimentant tous les  liquid rant and a gaseous fuel injector. We first operate the engine by supplying all the

cylindres en carburant liquide, le cas echeant en appli-  cylinders in liquid fuel, if applicable

quant de facon connue en soi un coefficient global de correction. On memorise le ou les parametres du moteur pris en compte pour servir de reference de correction, par exemple la richesse du melange calculee a partir d'une information de presence d'oxygene residue! detecte au moyen d'une sonde de pollution installee dans le pot d'echappement du moteur. On memorise simultanement les conditions de fonctionnement (temperature, regime...) dans  as in a manner known per se an overall correction coefficient. We memorize the engine parameter (s) taken into account to serve as a correction reference, for example the richness of the mixture calculated from information on the presence of oxygen residue! detected by means of a pollution sensor installed in the engine exhaust. The operating conditions (temperature, speed, etc.) are memorized simultaneously in

lesquelles le parametre de reference a ete determine.  which the reference parameter has been determined.

Puis on commute l' alimentation d' un premier cy-  Then we switch the power supply of a first cycle

lindre depuis le carburant liquide vers le carburant ga zeux et on utilise ['information de richesse memorisee  linder from liquid fuel to gas fuel and the stored wealth information is used

4 28403614 2840361

comme parametre de reference a atteindre et on determine un coefficient correctif de la commande de l'injecteur de carburant gazeux concerne de facon que pour les memes conditions de fonctionnement du moteur, la richesse obte nue soit egale a la richesse de reference. Apres determi-  as a reference parameter to be reached and a corrective coefficient of the control of the gaseous fuel injector is determined so that for the same engine operating conditions, the richness obtained is equal to the richness of reference. After determi-

nation du coefficient correctif, celui-ci est memorise.  nation of the correction coefficient, it is memorized.

Apres determination et memorisation du coeffi-  After determining and memorizing the coefficient

cient correctif pour le premier cylindre, l'alimentation du premier cylindre est commutee en retour vers le carbu rant liquide et le procede est mis en uvre en relation avec un second cylindre afin de determiner le coefficient  corrective solution for the first cylinder, the supply of the first cylinder is switched back to the liquid fuel and the process is carried out in relation to a second cylinder in order to determine the coefficient

correctif correspondent.corrective match.

Le procede selon l' invention est ainsi mis en u-  The method according to the invention is thus used in

vre successivement pour chacun des cylindres puis l'alimentation de tous les cylindres est commutee vers le carburant gazeux en appliquant pour chacun des cylindres le coefficient correctif correspondent qui a ete memorise prealablement. A partir d'un coefficient de reglage global pour les injecteurs de carburant liquide on obtient ainsi un  is checked successively for each of the cylinders then the supply of all the cylinders is switched to the gaseous fuel by applying for each of the cylinders the corresponding corrective coefficient which has been memorized beforehand. From an overall adjustment coefficient for the liquid fuel injectors, a

reglage specifique pour chacun des injecteurs de carbu-  specific setting for each fuel injector

rant gazeux, de sorte que la pollution globale du moteur  gaseous rant, so that the overall pollution of the engine

fonctionnant en carburant gazeux est minimisee.  operating on gaseous fuel is minimized.

Selon une variante de mise en muvre du procede selon l' invention, le procede est mis en muvre sur un  According to a variant implementation of the method according to the invention, the method is implemented on a

premier cylindre sans le commuter en retour vers le car-  first cylinder without switching it back to the car-

burant liquide et les autres cylindres vent ensuite suc-  burant liquid and the other cylinders wind then suc-

cessivement commutes vers une al imentat ion en carburant gazeux sans commuter en retour l'alimentation des cylin ares precedents vers le carburant liquide. Dans la mise  continually switched to a supply of gaseous fuel without switching back the supply of the previous cylinders to the liquid fuel. In the bet

en muvre de cette variante, la determination des coeffi-  in this variant, the determination of the coefficients

cients correctifs affectes a chaque cylindre est moins homogene que dans la mise en muvre decrite ci-dessus mais ['absence de commutation en retour permet de determiner de facon plus rapide ['ensemble des coefficients correc  corrective cients assigned to each cylinder is less homogeneous than in the set-up described above but [the absence of commutation in return makes it possible to determine more quickly [the set of corrected coefficients

tifs correspondent a chaque cylindre.  tifs correspond to each cylinder.

Bien entendu, l' invention n'est pas limitee au mode de rea l i sat i on decrit et on peut y apporter des va riantes de realisation sans sortir du cadre de l'inven  Of course, the invention is not limited to the mode of rea l i sat i described and it is possible to make variations therefrom without departing from the scope of the invention.

tion tel que defini par les revendications.  tion as defined by the claims.

En particulier bien que l' invention ait ete de crite en relation avec un premier carburant sous forme liquide et un second carburant sous forme gazeuse, l' invention stapplique egalement a deux carburants liqui des ou deux carburants gazeux, voire meme un premier car burant gazeux et un second carburant liquide dans la me sure ou les techniques de fabrication peuvent justifier que les injecteurs associes au premier carburant vent fa briques avec une grande precision, ou vent simplement se lectionnes pour presenter une faible dispersion, ce qui permet alors d'utiliser pour le second carburant des in  In particular, although the invention has been described in connection with a first fuel in liquid form and a second fuel in gaseous form, the invention also applies to two liquid fuels, one or two gaseous fuels, or even a first gas fuel. and a second liquid fuel in the same measure or the manufacturing techniques can justify that the injectors associated with the first fuel wind bricks with great precision, or wind simply selected to present a low dispersion, which then makes it possible to use for the second fuel of in

jecteurs presentant une plus forte dispersion.  jectors with higher dispersion.

Bien que le procede selon l' invention ait ete de crit se lon une mi se en uvre ou le coe fficient correct i f est determine successivement pour chaque cylindre, on peut effectuer une commutation de l'alimentation du pre mier carburant vers le second carburant selon des frac tions plus importantes des cylindres, par exemple en as sociant les cylindres selon des padres, le coefficient correctif etant alors commun aux deux cylindres d'une  Although the method according to the invention has been written according to an implementation or the correct coefficient if is successively determined for each cylinder, it is possible to switch from the supply of the first fuel to the second fuel according to larger fractions of the cylinders, for example by associating the cylinders according to padres, the corrective coefficient then being common to the two cylinders of a

meme padre.same padre.

Le procede selon ['invention s'applique egalement dans le cas ou un injecteur est commun a plusieurs cylin dres. Bien que ['invention ait ete decrite en relation avec une commutation de l'alimentation depuis le premier carburant vers le second carburant, le procede selon l' invention peut egalement etre mis en uvre lors d'une commutation de l'alimentation depuis le second carburant vers le premier carburant. Dans ce cas, le coefficient correctif est tonj ours determine en utilisant la richesse  The method according to the invention also applies in the case where an injector is common to several cylinders. Although the invention has been described in connection with a switching of the supply from the first fuel to the second fuel, the method according to the invention can also be implemented during a switching of the supply from the second fuel to the first fuel. In this case, the corrective coefficient is tonj ours determined using the richness

du melange de premier carburant comme richesse de refe-  of the first fuel mixture as a wealth of refe-

rence (memorisee lors d'un fonctionnement anterieur avec le premier carburant) et le coefficient correctif deter mine est mis en memoire pour une application directe lors d'une commutation ulterieure de l'alimentation depuis le  rence (memorized during an earlier operation with the first fuel) and the corrective coefficient deter mine is stored in memory for direct application during a subsequent switching of the supply from the

premier carburant vers le second carburant.  first fuel to the second fuel.

Bien que dans les modes de mise en uvre decrits le parametre de reference du moteur soit determine imme diatement avant une commutation de l'alimentation depuis le premier carburant vers le second carburant, ce qui permet une prise en compte tres precise des conditions de fonctionnement du moteur, on peut egalement prevoir une determination du parametre de reference anterieurement a  Although in the described implementation modes, the reference parameter of the engine is determined immediately before switching the supply from the first fuel to the second fuel, which allows very precise consideration of the operating conditions of the motor, it is also possible to provide for a determination of the reference parameter before

la mise en muvre du procede selon l' invention, par exem-  the implementation of the method according to the invention, for example-

ple lors du montage en usine ou lors d'une operation de maintenance du moteur. On notera egalement que le procede selon l' invention peut luimeme etre mis en uvre soit a chaque commutation de l'alimentation entre le premier  ple during factory assembly or during an engine maintenance operation. It will also be noted that the method according to the invention can itself be implemented either at each switching of the supply between the first

carburant et le second carburant soit selon des periodi-  fuel and the second fuel either according to periodi-

cites predeterminees ou encore lors du montage du moteur ou lors d'une operation de maintenance, les coefficients  quoted predetermined or again during the assembly of the engine or during a maintenance operation, the coefficients

correctifs etant alors memorises pour une application di-  corrections are then memorized for a di-

recte lors d' une commutation de l' alimentation depuis le  correct when switching the power supply from the

premier carburant liquide vers le second carburant.  first liquid fuel to the second fuel.

Bien que la richesse du melange d' air et de car-  Although the richness of the mixture of air and car-

burant ait ete indiquee comme parametre servant a la de-  burant has been indicated as a parameter used for the

termination du coefficient correctif le procede s' applique plus generalement a la determination du coef ficient correctif au moyen de tout parametre pouvant etre pris en compte pour la commande des injecteurs du second carburant.  termination of the corrective coefficient the process is applied more generally to the determination of the corrective coefficient by means of any parameter which can be taken into account for the control of the injectors of the second fuel.

Claims (9)

REVENDICATIONS 1. Procede de reglage de l' alimentation d' un mo-  1. Method for adjusting the power supply of a mo- teur pouvant fonctionner avec un premier carburant et un second carburant, caracterise en ce qu'il comporte, lors  tor capable of operating with a first fuel and a second fuel, characterized in that it comprises, during d'une commutation de l'alimentation entre le premier car-  a switching of the power supply between the first car- burant et le second carburant, les etapes de:  fuel and the second fuel, the stages of: - commuter l'alimentation d'une fraction des cy-  - switch on the supply of a fraction of the cy- lindres du moteur; - determiner un coefficient correctif d' au moins un parametre de l'alimentation en second carburant de la fraction des cylindres pour mettre ce parametre en con formite avec un parametre de reference correspondent du moteur lors d'une alimentation du moteur en premier car burant; - et appliquer le coefficient correctif a  engine liners; - determine a corrective coefficient for at least one parameter of the supply of second fuel to the fraction of the cylinders to bring this parameter into conformity with a corresponding reference parameter of the engine when the engine is first supplied with fuel; - and apply the corrective coefficient a l'alimentation en second carburant de la fraction des cy-  the supply of second fuel to the fraction of cy- lindres.  lindres. 2. Procede selon la revendication 1, caracterise en ce que la determination du coefficient correctif est effectuee successivement pour differentes fractions des cylindres.2. Method according to claim 1, characterized in that the determination of the corrective coefficient is carried out successively for different fractions of the cylinders. 3. Procede selon la revendication 1, caracterise en ce qu'apres la determination du coefficient correctif,3. Method according to claim 1, characterized in that after the determination of the corrective coefficient, celui-ci est memorise.this is memorized. 4. Procede selon la revendication 3, caracterise en ce qutapres la determination du coefficient correctif lors d'une commutation de l'alimentation d'une fraction des cylindres depuis le premier carburant vers le second  4. Method according to claim 3, characterized in that after determining the corrective coefficient when switching the supply of a fraction of the cylinders from the first fuel to the second carburant, l'alimentation est commutee en retour du se-  fuel, the supply is switched back from the se- cond carburant vers le premier carburant et le procede est ensuite mis en uvre en relation avec une nouvelle  cond fuel to the first fuel and the process is then implemented in connection with a new fraction des cylindres.fraction of cylinders. 5. Procede selon la revendication 4, caracterise en ce qu'apres la determination du coefficient correctif pour differentes fractions des cylindres, l'alimentation de ces fractions des cylindres est commutee vers le se cond carburant en appliquant les coefficients correctifs memorlses.  5. Method according to claim 4, characterized in that after the determination of the corrective coefficient for different fractions of the cylinders, the supply of these fractions of the cylinders is switched to the fuel cond by applying the corrective coefficients memorized. 6. Procede selon la revendication 3, caracterise en ce qu'il est mis en uvre lors du montage du moteur ou6. Method according to claim 3, characterized in that it is implemented during assembly of the engine or lors d'une operation de maintenance de celui-ci.  during a maintenance operation thereof. 7. Procede selon la revendication 1, caracterise en ce que le parametre de reference est la richesse d'un  7. Method according to claim 1, characterized in that the reference parameter is the richness of a melange d' air et de premier carburant.  mixture of air and first fuel. 8. Procede selon la revendication 1, caracterise en ce que le parametre de reference est determine imme diatement avant une commutation du premier carburant vers  8. Method according to claim 1, characterized in that the reference parameter is determined immediately before switching from the first fuel to le second carburant.the second fuel. 9. Procede selon la revendication 1, caracterise en ce qu'il est mis en muvre lors d'une commutation de l'alimentation depuis le second carburant vers le premier carburant et en ce que le coefficient correctif est mis en memoire pour une application directe lors d'une commu tation ulterieure de l'alimentation depuis le premier  9. Method according to claim 1, characterized in that it is implemented during a switching of the supply from the second fuel to the first fuel and in that the corrective coefficient is stored in memory for direct application during a subsequent switchover of the power supply from the first
FR0206479A 2002-05-28 2002-05-28 METHOD FOR ADJUSTING THE POWER SUPPLY OF A MOTOR THAT CAN OPERATE ON TWO FUELS Expired - Fee Related FR2840361B1 (en)

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EP1510678A1 (en) * 2003-08-22 2005-03-02 Olaf Zimmermann Fuel injection system of an internal combustion engine
EP1669578A1 (en) * 2004-11-12 2006-06-14 Mazda Motor Corporation Fuel switching for dual fuel engine
WO2014027138A1 (en) * 2012-08-17 2014-02-20 Wärtsilä Finland Oy Method of operating a multi-cylinder internal combustion piston engine
EP2853713A3 (en) * 2013-09-26 2016-03-23 Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland A large low-speed tubocharged two-stroke internal combustion engine with a dual fuel supply system

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EP0557539A1 (en) * 1990-11-26 1993-09-01 Gas Research Institute Apparatus and method for providing an alternative fuel system for engines
US5628294A (en) * 1993-09-21 1997-05-13 Gentec B.V. System and method for metering the fuel supply to a combustion installation operating on more than one type of fuel
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1510678A1 (en) * 2003-08-22 2005-03-02 Olaf Zimmermann Fuel injection system of an internal combustion engine
EP1669578A1 (en) * 2004-11-12 2006-06-14 Mazda Motor Corporation Fuel switching for dual fuel engine
US7228841B2 (en) 2004-11-12 2007-06-12 Mazada Motor Corporation Fuel switching for dual fuel engine
WO2014027138A1 (en) * 2012-08-17 2014-02-20 Wärtsilä Finland Oy Method of operating a multi-cylinder internal combustion piston engine
KR20150041144A (en) * 2012-08-17 2015-04-15 바르실라 핀랜드 오이 Method of operating a multi-cylinder internal combustion piston engine
CN104641086A (en) * 2012-08-17 2015-05-20 瓦锡兰芬兰有限公司 Method of operating a multi-cylinder internal combustion piston engine
CN104641086B (en) * 2012-08-17 2017-08-18 瓦锡兰芬兰有限公司 The method for operating multi-cylinder internal combustion piston-mode motor
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EP2853713A3 (en) * 2013-09-26 2016-03-23 Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland A large low-speed tubocharged two-stroke internal combustion engine with a dual fuel supply system

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