FR2833993A1 - Method for managing operation of active post-treatment devices in engine exhaust line comprises monitoring accelerator, brake and clutch pedal positions to authorize changeover form one operating mode to another - Google Patents

Method for managing operation of active post-treatment devices in engine exhaust line comprises monitoring accelerator, brake and clutch pedal positions to authorize changeover form one operating mode to another Download PDF

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Publication number
FR2833993A1
FR2833993A1 FR0116869A FR0116869A FR2833993A1 FR 2833993 A1 FR2833993 A1 FR 2833993A1 FR 0116869 A FR0116869 A FR 0116869A FR 0116869 A FR0116869 A FR 0116869A FR 2833993 A1 FR2833993 A1 FR 2833993A1
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Prior art keywords
operating mode
exhaust line
brake
clutch pedal
pedal
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FR0116869A
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French (fr)
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FR2833993B1 (en
Inventor
Romuald Chaumeaux
Muro David Di
Benoit Thuault
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Renault SAS
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Renault SAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • 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
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration
    • F02D41/107—Introducing corrections for particular operating conditions for acceleration and deceleration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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
    • F02D2250/18—Control of the engine output torque
    • F02D2250/21—Control of the engine output torque during a transition between engine operation modes or states
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

The active post-treatment devices in the i.c. engine exhaust line comprises pre-catalyzer and a particle filter. Their operation is managed by allowing the transfer form one operating mode to another during the actions of the driver or at the end of a specified time. The driver's action on the accelerator pedal, the brake pedal or clutch pedal are continuously monitored. The transfer from one operating mode to another is authorized if the absolute value of the accelerator pedal position is greater than a calculated threshold value, or if the brake or clutch pedal is applied. The units necessary for the implementation of the procedure are a comparison unit for the accelerator pedal position variation (25), a calculation unit (26) for the maximum waiting time, a brake pedal monitoring unit (27) and a clutch pedal monitoring unit (28). An Independent claim is included for an i.c. engine comprising a control device for its exhaust line active post-treatment devices.

Description

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PROCEDE DE GESTION DU FONCTIONNEMENT DE DISPOSITIFS-DE
POST-TRAITEMENT ACTIFS INSERES DANS LA LIGNE
D'ECHAPPEMENT D'UN MOTEUR A COMBUSTION INTERNE
DESCRIPTION DOMAINE TECHNIQUE
La présente invention concerne un procédé de gestion du fonctionnement de dispositifs de posttraitement actifs insérés dans la ligne d'échappement d'un moteur à combustion interne. METHOD FOR MANAGING THE OPERATION OF DEVICES
ACTIVE AFTER-TREATMENT INSERTED IN THE LINE
EXHAUST OF AN INTERNAL COMBUSTION ENGINE
TECHNICAL FIELD DESCRIPTION
The present invention relates to a method for managing the operation of active aftertreatment devices inserted into the exhaust line of an internal combustion engine.

ETAT DE LA TECHNIQUE ANTERIEURE
Les normes concernant la pollution et la consommation des moteurs à combustion interne équipant les véhicules deviennent de plus en plus sévères dans l'ensemble des pays industrialisés. STATE OF THE PRIOR ART
The standards concerning pollution and consumption of internal combustion engines fitted to vehicles are becoming more and more stringent in all industrialized countries.

Le domaine de l'invention est celui de l'utilisation de dispositifs dits"de post-traitement", c'est-à-dire de traitement en sortie du moteur, actifs.  The field of the invention is that of the use of so-called "post-processing" devices, that is to say processing at the output of the engine, which are active.

Parmi les dispositifs de post-traitement actifs connus pour éliminer les particules de suie émises par de tels moteurs on peut citer les pièges à Nox, les filtres à particules, qui sont insérés dans les lignes d'échappement de ces moteurs.  Among the active post-treatment devices known for eliminating the soot particles emitted by such engines, there may be mentioned the Nox traps, the particle filters, which are inserted into the exhaust lines of these engines.

Les filtres à particules sont adaptés pour piéger les particules de suie contenues dans les gaz d'échappement.  Particulate filters are suitable for trapping soot particles contained in exhaust gases.

Des systèmes de régénération permettent de brûler périodiquement les particules piégées dans ces filtres et éviter leur colmatage. La mise en action de

Figure img00010001

1 1ces différents systèmes d'aide à la régénération est Regeneration systems make it possible to periodically burn the particles trapped in these filters and prevent their clogging. The putting into action of
Figure img00010001

1 1these different regeneration support systems is

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pilotée par un système électronique de commande-qui détermine en fonction d'un certain nombre de paramètres et notamment le chargement du filtre à particules, l'instant de la régénération
Ainsi, le document FR 2 774 421 divulgue un système de gestion du fonctionnement d'un filtre à particules associé à un moteur de véhicule automobile, et décrit comment la mise en action des moyens d'aide à la régénération est déclenchée dès lors que la masse de suie dans le filtre est supérieure à une valeur de seuil, cette masse de suie étant déterminée à partir de la mesure de la perte de charge aux bornes du filtre à particules et des conditions de fonctionnement du moteur. De manière connue, la stratégie de mise en action de tels moyens d'aide à la régénération, sitôt le seuil de chargement atteint, est relativement simple. Elle consiste essentiellement. à maintenir ces moyens activés pendant une période de temps calibrée ou encore à maintenir les moyens activés tant que le chargement n'est pas repassé en dessous d'une seconde valeur de seuil donnée. controlled by an electronic control system which determines, depending on a certain number of parameters and in particular the loading of the particle filter, the moment of regeneration
Thus, the document FR 2 774 421 discloses a system for managing the operation of a particle filter associated with a motor vehicle engine, and describes how the activation of the regeneration assistance means is triggered as soon as the mass of soot in the filter is greater than a threshold value, this mass of soot being determined from the measurement of the pressure drop across the particulate filter and the engine operating conditions. In known manner, the strategy of putting into action such means of aid for regeneration, as soon as the loading threshold is reached, is relatively simple. It basically consists. to keep these means activated for a calibrated period of time or to maintain the means activated as long as the load has not returned to below a second given threshold value.

De tels systèmes de régénération nécessitent plusieurs modes de fonctionnement du moteur de manière à nettoyer et à purger périodiquement les dispositifs de post-traitement actifs. Un premier mode de fonctionnement peut, ainsi, être un mode de fonctionnement classique du moteur. Un second mode peut être un mode de mise en chauffe d'un catalyseur situé en sortie du moteur pour qu'il soit en efficacité maximum. Un troisième mode peut être un mode qui permet de remettre les dispositifs de post-traitement actif en  Such regeneration systems require several operating modes of the engine so as to periodically clean and purge the active after-treatment devices. A first operating mode can thus be a conventional operating mode of the engine. A second mode can be a mode of heating a catalyst located at the outlet of the engine so that it is at maximum efficiency. A third mode can be a mode which enables the active post-processing devices to be brought back into

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leur état initial ; par exemple un mode qui consiste à nettoyer le filtre à particules de ses suies en le faisant fonctionner à très haute température.  their initial state; for example a mode which consists in cleaning the particulate filter of its soot by operating it at very high temperature.

Or, la transition entre ces différents modes de fonctionnement peut engendrer un coup de couple perceptible par les occupants du véhicule.  However, the transition between these different operating modes can cause a noticeable torque boost for the vehicle occupants.

Les systèmes de l'art connu utilisent un dispositif de contrôle qui gère les dispositifs de post-traitement, et décide du passage d'un mode de fonctionnement moteur dans un autre lorsqu'il atteint des seuils pré-définis. Ce dispositif de contrôle ne tient pas compte du comportement du conducteur du véhicule.  The systems of the known art use a control device which manages the post-processing devices, and decides to switch from one engine operating mode to another when it reaches pre-defined thresholds. This control device does not take into account the behavior of the driver of the vehicle.

Ainsi, la demande de brevet FR 2 799 508, qui décrit un procédé d'injection de carburant, pour régénérer un système de traitement des gaz d'échappement, tel qu'un filtre à particules, par combustion des particules stockées dans le filtre, des moyens de mesure transmettent à un système électronique de commande des informations représentatives du niveau de chargement du filtre à particules. Ce système électronique de commande prend en compte le niveau de chargement du filtre à particules, ainsi que le point de fonctionnement du moteur, pour déclencher la phase de régénération.  Thus, patent application FR 2 799 508, which describes a fuel injection process, for regenerating an exhaust gas treatment system, such as a particle filter, by combustion of the particles stored in the filter, measuring means transmit to an electronic control system information representative of the loading level of the particle filter. This electronic control system takes into account the loading level of the particulate filter, as well as the engine operating point, to trigger the regeneration phase.

Mais de tels systèmes de l'art connu peuvent, lors d'une transition d'un mode de fonctionnement moteur à un autre, engendrer des"à coups"pour les occupants du véhicule.  However, such systems of the known art can, during a transition from one engine operating mode to another, generate "jolts" for the occupants of the vehicle.

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L'objet de l'invention est donc de pallier cet inconvénient de telle façon qu'une telle transition ne soit pas ressentie.  The object of the invention is therefore to overcome this drawback so that such a transition is not felt.

EXPOSÉ DE L'INVENTION
La présente invention concerne un procédé de gestion du fonctionnement de dispositifs de posttraitement actifs, par exemple un pré-catalyseur et un filtre à particules, insérés dans la ligne d'échappement d'un moteur à combustion interne, dans lequel on utilise un dispositif de contrôle qui gère ces dispositifs selon plusieurs modes de fonctionnement du moteur, caractérisé en ce qu'on autorise le basculement d'un mode de fonctionnement du moteur à un autre mode lors d'une action du conducteur ou au bout d'un temps déterminé. STATEMENT OF THE INVENTION
The present invention relates to a method for managing the operation of active aftertreatment devices, for example a pre-catalyst and a particle filter, inserted in the exhaust line of an internal combustion engine, in which a device is used. control which manages these devices according to several operating modes of the engine, characterized in that the switching from one operating mode of the engine to another mode is authorized during an action by the driver or after a determined time.

Dans ce procédé, avantageusement, on surveille en continu. une action du conducteur sur la pédale d'accélérateur, ou sur la pédale de frein, ou sur la pédale d'embrayage.  In this process, advantageously, continuous monitoring is carried out. driver's action on the accelerator pedal, or on the brake pedal, or on the clutch pedal.

Avantageusement, on autorise un basculement d'un mode à un autre si : e la valeur absolue de la variation de la position de la pédale d'accélérateur est supérieure à une valeur de seuil calculée, ou * la pédale de frein est appuyée, ou * la pédale d'embrayage est appuyée, ou si les conditions de basculement n'ont pas été atteintes au bout d'un délai déterminé.  Advantageously, a switch from one mode to another is authorized if: e the absolute value of the variation in the position of the accelerator pedal is greater than a calculated threshold value, or * the brake pedal is depressed, or * the clutch pedal is depressed, or if the tilting conditions have not been reached after a determined period.

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Le procédé de l'invention, en complément du dispositif de contrôle qui gère le fonctionnement des dispositifs de post-traitement actifs, permet de choisir le moment le plus adapté pour basculer d'un mode de fonctionnement à un autre.  The method of the invention, in addition to the control device which manages the operation of the active post-processing devices, makes it possible to choose the most suitable moment for switching from one operating mode to another.

L'agrément de la conduite, vu du conducteur, n'est en aucun cas affecté par le procédé de l'invention.  Driving pleasure, seen from the driver, is in no way affected by the process of the invention.

BRÈVE DESCRIPTION DES DESSINS
La figure 1 illustre l'implantation de dispositifs de post-traitement actifs dans la ligne d'échappement d'un moteur à combustion interne. BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates the installation of active post-treatment devices in the exhaust line of an internal combustion engine.

La figure 2 illustre la mise en oeuvre du procédé de l'invention.  FIG. 2 illustrates the implementation of the method of the invention.

EXPOSÉ DÉTAILLÉ DE L'INVENTION
La figure 1 illustre la structure générale d'un moteur à combustion interne, destiné à équiper par exemple un véhicule automobile. Ce moteur 10 est ici suralimenté par un turbo-compresseur (turbine 11 + compresseur 12). La ligne d'échappement 14 de ce moteur 10 est équipée de dispositifs de post-traitement actifs destinés à purifier les gaz d'échappement, ici un pré-catalyseur 13 et un filtre à particules 14. Une vanne EGR 15 ("Exhaust Gaz Recirculation") permet une recirculation des gaz d'échappement. La circulation des gaz frais, référencée 16, traverse successivement un filtre à air 17, un débitmètre 18, le compresseur 12 et un refroidisseur d'air de suralimentation 19. La circulation des gaz brûlés est, quant à elle, référencée 20. DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 illustrates the general structure of an internal combustion engine, intended to equip for example a motor vehicle. This motor 10 is here supercharged by a turbo-compressor (turbine 11 + compressor 12). The exhaust line 14 of this engine 10 is equipped with active after-treatment devices intended to purify the exhaust gases, here a pre-catalyst 13 and a particle filter 14. An EGR valve 15 ("Exhaust Gas Recirculation ") allows recirculation of exhaust gases. The circulation of fresh gases, referenced 16, successively passes through an air filter 17, a flow meter 18, the compressor 12 and a charge air cooler 19. The circulation of burnt gases is, in turn, referenced 20.

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Le filtre à particules 14 pourrait, également, être placé à la place de pré-catalyseur 13 et assurer les fonctions de piégeage des particules ainsi que l'oxydation des gaz d'échappement (fonction usuelle du pré-catalyseur).  The particle filter 14 could also be placed in place of the pre-catalyst 13 and perform the particle trapping functions as well as the oxidation of the exhaust gases (usual function of the pre-catalyst).

L'invention consiste donc à surveiller le comportement du conducteur, et notamment les actions effectuées par celui-ci via des capteurs de position situés sur les pédales d'accélérateur, d'embrayage, et de frein du véhicule, de manière à choisir le moment le plus adapté pour basculer d'un mode de fonctionnement du moteur dans un autre mode. L'invention consiste donc à détecter les instants les plus propices pour réaliser un tel basculement, par exemple un changement de rapport de la boîte de vitesse, un lâché de pied... et ainsi d'effectuer ce basculement dans les meilleures conditions.  The invention therefore consists in monitoring the behavior of the driver, and in particular the actions carried out by the latter via position sensors located on the accelerator, clutch, and brake pedals of the vehicle, so as to choose the moment. most suitable for switching from one operating mode of the engine to another mode. The invention therefore consists in detecting the most favorable moments for carrying out such a tilting, for example a change of gearbox ratio, a release of the foot ... and thus effecting this tilting under the best conditions.

Plus précisément, le procédé de l'invention consiste à : - comparer en continu la variation de position de la pédale d'accélération à un seuil minimum de variation de position de cette pédale issu d'un ensemble de valeurs de seuils, ou cartographie, de variation minimum, - surveiller un déplacement de la pédale de frein, - surveiller un déplacement de la pédale d'embrayage.  More precisely, the method of the invention consists in: - continuously comparing the variation in position of the accelerator pedal with a minimum threshold for variation in position of this pedal derived from a set of threshold values, or mapping, minimum variation, - monitor movement of the brake pedal, - monitor movement of the clutch pedal.

- calculer un délai d'attente maximale, - traiter les différents signaux obtenus pour donner l'autorisation au dispositif de gestion des  - calculate a maximum waiting time, - process the various signals obtained to give authorization to the device for managing

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dispositifs de post-traitement actifs de procéder à un basculement d'un mode de fonctionnement du moteur à un autre.  active post-processing devices to switch from one operating mode of the engine to another.

Cette autorisation est ainsi donnée lorsque les conditions suivantes sont remplies :

Figure img00070001

- la valeur absolue de la variation de position de la pédale d'accélérateur A t est supérieure à une valeur de seuil calculée : a/At seuil~mini ; cette valeur du seuil dépendant du présent rapport (vitesse véhicule)/ (vitesse moteur), par exemple du rapport de boîte engagé, ou - la pédale de frein a été appuyée, ou - la pédale d'embrayage a été appuyée. This authorization is thus given when the following conditions are met:
Figure img00070001

- the absolute value of the position variation of the accelerator pedal A t is greater than a calculated threshold value: a / At threshold ~ mini; this threshold value depending on this ratio (vehicle speed) / (engine speed), for example of the gearbox engaged, or - the brake pedal was depressed, or - the clutch pedal was depressed.

De plus, si les conditions pour le basculement n'ont pas été atteintes au bout d'un délai de temps déterminé, par exemple 20 secondes, l'autorisation de basculement est donnée, quel que soit le comportement du conducteur.  In addition, if the conditions for tilting have not been reached after a determined time, for example 20 seconds, the tilting authorization is given, regardless of the driver's behavior.

Les différents ensemble nécessaires pour la mise en oeuvre du procédé de l'invention sont illustrés sur la figure 2. Ce sont : - un ensemble 25 de comparaison de la variation de la position de la pédale d'accélérateur à un seuil, - un ensemble 26 de calcul d'un délai d'attente maximum, - un ensemble 27 de surveillance de la position de la pédale de frein, - un ensemble 28 de surveillance de la position de la pédale d'embrayage,  The various assemblies necessary for the implementation of the method of the invention are illustrated in FIG. 2. These are: - an assembly 25 for comparing the variation of the position of the accelerator pedal to a threshold, - an assembly 26 for calculating a maximum waiting time, a set 27 for monitoring the position of the brake pedal, a set 28 for monitoring the position of the clutch pedal,

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- un ensemble 29 de mise en oeuvre-du procédé de l'invention.  - An assembly 29 for implementing the method of the invention.

L'ensemble 25 de comparaison comprend un capteur 30 de variation de la pédale d'accélérateur suivi d'un module 31 de calcul de valeur absolue du signal mesuré et d'un module 32 de comparaison, qui reçoit sur sa seconde entrée un seuil issu d'un module 33 de calcul de seuils, fonction du rapport El = (vitesse véhicule)/ (vitesse moteur).  The comparison assembly 25 includes a sensor 30 for variation of the accelerator pedal followed by a module 31 for calculating the absolute value of the measured signal and a comparison module 32, which receives a threshold from its second input of a module 33 for calculating thresholds, function of the ratio El = (vehicle speed) / (motor speed).

L'ensemble 26 de calcul de délai comprend un module horloge 35 qui reçoit sur une première entrée E un signal issu d'une porte ET 36 dont les deux entrées reçoivent d'une part le signal issu de la sortie du module de comparaison 32 inversé dans un inverseur 37 et d'autre part un signal E2 d'autorisation de basculement en attente et sur une seconde entrée I un signal issu d'un comparateur 38 dont les deux entrées reçoivent d'une part le signal E2 inversé dans un inverseur 39 et d'autre part un signal E3 de changement de mode de combustion. Cet ensemble 26 comprend également un comparateur 40 qui reçoit d'une part le signal de sortie du module horloge 35 et d'autre part un seuil issu d'un module 41 de calcul de seuils, fonction du rapport El = (vitesse véhicule)/- (vitesse moteur).  The delay calculation unit 26 includes a clock module 35 which receives on a first input E a signal from an AND gate 36 whose two inputs receive on the one hand the signal from the output of the inverted comparison module 32 in an inverter 37 and on the other hand a signal E2 of authorization for tilting on standby and on a second input I a signal coming from a comparator 38 whose two inputs receive on the one hand the signal E2 inverted in an inverter 39 and on the other hand a combustion mode change signal E3. This assembly 26 also includes a comparator 40 which receives on the one hand the output signal from the clock module 35 and on the other hand a threshold from a module 41 for calculating thresholds, function of the ratio El = (vehicle speed) / - (motor speed).

Les ensembles 27 et 28 de surveillance sont constitués respectivement des capteurs de variation de la position de la pédale de frein et de variation de la pédale d'embrayage.  The monitoring assemblies 27 and 28 are constituted respectively by sensors for variation of the position of the brake pedal and variation of the clutch pedal.

L'ensemble 29 de mise en oeuvre du procédé de l'invention reçoit les sorties de ces différents  The assembly 29 for implementing the method of the invention receives the outputs of these different

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ensembles 25,26, 27 et 28 pour délivrer un signal S d'autorisation de basculement d'un mode d'une combustion à un autre conformément au procédé de l'invention. Cet ensemble fonctionne comme une porte logique OU. assemblies 25, 26, 27 and 28 for delivering an authorization signal S for switching from one mode of combustion to another in accordance with the method of the invention. This set functions as an OR logic gate.

Claims (5)

REVENDICATIONS 1. Procédé de gestion du fonctionnement de dispositifs de post-traitements actifs insérés dans la ligne d'échappement d'un moteur à combustion interne, dans lequel on utilise un dispositif de contrôle qui gère ces dispositifs, selon plusieurs modes de fonctionnement du moteur, caractérisé en ce qu'on autorise le basculement d'un mode de fonctionnement du moteur à un autre mode lors d'une action du conducteur ou au bout d'un temps déterminé. 1. Method for managing the operation of active after-treatment devices inserted into the exhaust line of an internal combustion engine, in which a control device is used which manages these devices, according to several operating modes of the engine, characterized in that the switching from one operating mode of the engine to another mode is authorized during an action by the driver or after a determined time. 2. Procédé selon la revendication l, dans lequel les dispositifs de post-traitement actifs comprennent un pré-catalyseur et un filtre à particules.  2. Method according to claim 1, in which the active post-treatment devices comprise a pre-catalyst and a particle filter. 3. Procédé selon la revendication 1, dans lequel on surveille en continu une éventuelle action du conducteur sur la pédale d'accélérateur, ou sur la pédale de frein, ou sur la pédale d'embrayage.  3. The method of claim 1, wherein continuously monitoring a possible action of the driver on the accelerator pedal, or on the brake pedal, or on the clutch pedal. 4. Procédé selon la revendication 3, dans lequel on autorise le basculement d'un mode de fonctionnement à un autre si : a la valeur absolue de la variation de la position de la pédale d'accélérateur est supérieure à une valeur de seuil calculée, ou * la pédale de frein est appuyée, ou * la pédale d'embrayage est appuyée,  4. Method according to claim 3, in which the switching from one operating mode to another is authorized if: a the absolute value of the variation in the position of the accelerator pedal is greater than a calculated threshold value, or * the brake pedal is depressed, or * the clutch pedal is depressed, <Desc/Clms Page number 11><Desc / Clms Page number 11> ou si les conditions de basculement n'ont pas -été atteintes au bout d'un délai déterminé.  or if the changeover conditions have not been reached after a determined period. 5. Moteur à combustion interne comprenant un dispositif de post-traitement actif inséré dans la ligne d'échappement et un dispositif de contrôle de ses dispositifs destinés à mettre en oeuvre le procédé selon l'une des revendications 1 à 4. 5. Internal combustion engine comprising an active after-treatment device inserted into the exhaust line and a device for controlling its devices intended to implement the method according to one of claims 1 to 4.
FR0116869A 2001-12-26 2001-12-26 METHOD FOR MANAGING THE OPERATION OF ACTIVE AFTER-TREATMENT DEVICES INSERTED IN THE EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE Expired - Fee Related FR2833993B1 (en)

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EP2628928A3 (en) * 2009-12-22 2014-08-27 Perkins Engines Company Limited Regeneration assist calibration

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FR2774421A1 (en) 1998-02-02 1999-08-06 Peugeot Operational control of diesel engine exhaust particle filter
WO1999049190A1 (en) * 1998-03-20 1999-09-30 Ab Volvo Method and arrangement for control of air-fuel ratio of combustion engine
DE19823512A1 (en) * 1998-05-26 1999-12-02 Siemens Ag Process for the regeneration of a NOx storage catalytic converter
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WO2011077072A1 (en) * 2009-12-22 2011-06-30 Perkins Engines Company Limited Regeneration assist delay period
CN102770649A (en) * 2009-12-22 2012-11-07 珀金斯发动机有限公司 Regeneration assist delay period
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EP2628928A3 (en) * 2009-12-22 2014-08-27 Perkins Engines Company Limited Regeneration assist calibration
CN102770649B (en) * 2009-12-22 2015-06-03 珀金斯发动机有限公司 Regeneration assist delay period

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