WO2013072590A1 - Controlling the operation of a diesel internal combustion engine - Google Patents

Controlling the operation of a diesel internal combustion engine Download PDF

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Publication number
WO2013072590A1
WO2013072590A1 PCT/FR2012/052473 FR2012052473W WO2013072590A1 WO 2013072590 A1 WO2013072590 A1 WO 2013072590A1 FR 2012052473 W FR2012052473 W FR 2012052473W WO 2013072590 A1 WO2013072590 A1 WO 2013072590A1
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WO
WIPO (PCT)
Prior art keywords
temperature
engine
atmospheric pressure
tfc
patm
Prior art date
Application number
PCT/FR2012/052473
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French (fr)
Inventor
Yoan BERNARD
Benoit BARRE
Original Assignee
Peugeot Citroen Automobiles Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Priority to EP12794387.6A priority Critical patent/EP2780572B1/en
Publication of WO2013072590A1 publication Critical patent/WO2013072590A1/en

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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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/04—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/30—Engine incoming fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/023—Temperature of lubricating oil or working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/703—Atmospheric pressure

Definitions

  • the invention relates to a method of controlling the operation of a diesel type internal combustion engine.
  • a temperature of the heat transfer fluid of the thermal control circuit of the engine is determined
  • a modified temperature of said heat transfer fluid is calculated from said temperature of the coolant and the ambient atmospheric pressure.
  • the operating control system of a diesel type internal combustion engine resulting from the process described above, is characterized in that it comprises a means for determining the temperature of the coolant, a means for determining the ambient atmospheric pressure and a means for calculating the modified temperature of the coolant.
  • the operating control of a diesel-type internal combustion engine using not only the temperature of the coolant, but directly using the atmospheric pressure Patm and the temperature of the coolant has the advantage of introducing the parameter of the atmospheric pressure at the beginning of the process which makes it possible to better adapt the operation control to the use situation of the engine.
  • the correction to be made only depends on a single parameter which facilitates the development of the engine.
  • FIG. 1 represents the operation of the control method from an ambient atmospheric pressure and a temperature of the heat-transfer thermal control fluid of the engine, according to one aspect of the invention.
  • FIG. 2 describes a method for controlling the operation of an engine, from an atmospheric pressure, of a temperature of the heat-transfer fluid for thermal regulation of the engine, and comprising a correction of said control from at least an additional parameter.
  • the control method includes the steps illustrated in Figure 1.
  • a temperature Tfc of the thermal control heat transfer fluid of the engine is determined, for example by means of a temperature measurement probe.
  • a step 2 consists of a determination of an atmospheric pressure Patm ambient, for example using a pressure sensor.
  • a step 3 consists of a determination of a modified temperature Tm of the coolant.
  • the temperature Tfc of the heat transfer fluid is modified via a transfer function dependent on the temperature Tfc of the heat transfer fluid and the ambient atmospheric pressure Patm. This transfer function can be determined empirically and validated by tests or can be derived from physical modeling.
  • the temperature Tm modified coolant is a better indicator of engine operating conditions than the temperature Tfc of the heat transfer fluid.
  • the modified temperature Tm of the heat transfer fluid is then transmitted to an electronic control unit.
  • the modified temperature Tm makes it possible to better adapt the operating control to the conditions of use of the engine and thus to obtain a better compromise between consumption, pollution, approval, noise and performance.
  • FIG. 2 shows the method of controlling the operation of the engine from the modified temperature Tm further comprising an optional correction step from an additional parameter.
  • the first three steps of this process are identical to those of FIG.
  • a temperature Tfc of the thermal control heat transfer fluid of the engine is determined, for example by means of a temperature measurement probe.
  • a step 2 consists of a determination of the atmospheric pressure Patm ambient, for example using a pressure sensor.
  • a step 3 consists of a determination of a modified temperature Tm of the coolant.
  • the temperature Tfc of the heat transfer fluid is modified via a transfer function, determined empirically or from physical modeling, and dependent on the temperature Tfc of the heat transfer fluid and the atmospheric pressure Patm ambient.
  • the modified temperature Tm of the heat transfer fluid is then transmitted to an electronic control unit.
  • a command of operation adapted to the operating situation of the engine is then selected from a plurality of predefined commands.
  • a step 4 for correcting the engine operation command optimizes the previously selected operation control.
  • the modification of the operation command is established via a transfer function dependent on additional parameters.
  • One of the additional parameters may include the temperature of the ambient air.
  • the operation control thus modified is better adapted to the conditions of use of the engine.
  • the operation control according to the invention has the advantage of obtaining a better compromise between consumption, pollution, approval, noise and performance and facilitate the development of the engine since there is only one only corrective parameter.

Abstract

The invention relates to a method for controlling the operation of a diesel internal combustion engine, which comprises a plurality of steps. In one step (1), the temperature (Tfc) of the heat-transport fluid of a temperature control circuit of the engine is determined. In a second step (2), an ambient atmospheric pressure (Patm) is determined. In a third step (3), a modified temperature (Tm) for said heat-transport fluid is calculated from the temperature (Tfc) of the heat-transport fluid and the atmospheric pressure (Patm). The atmospheric pressure parameter is introduced at the start of the method, thereby allowing the operation control to be adapted to engine usage conditions, without complicating engine tuning.

Description

COMMANDE DE FONCTIONNEMENT D'UN MOTEUR A COMBUSTION OPERATING CONTROL OF A COMBUSTION ENGINE
INTERNE DE TYPE DIESEL INTERNAL TYPE DIESEL
[0001] L'invention concerne un procédé de commande de fonctionnement d'un moteur à combustion interne de type Diesel.  The invention relates to a method of controlling the operation of a diesel type internal combustion engine.
[ooo2] Il est connu de commander le fonctionnement d'un moteur à combustion interne de type Diesel de manière à réguler des paramètres de fonctionnement du moteur tels que l'avance à l'injection, le débit d'injection du carburant ou la commande des bougies pré et post chauffage, permettant de réguler leur température en fonction des conditions environnementales, afin d'obtenir le meilleur compromis possible entre une faible consommation, un niveau de pollution faible, un bon agrément de conduite, un niveau sonore faible et de bonnes performances du moteur. Ce compromis entre consommation, pollution, agrément, bruit et performance doit être optimisé quelque soit la situation d'utilisation du moteur, lors d'un démarrage du moteur, lors d'un fonctionnement du moteur à température extérieure tempérée, froide ou chaude ou lors d'un fonctionnement du moteur à altitude élevée. [Ooo2] It is known to control the operation of a diesel type internal combustion engine so as to regulate engine operating parameters such as injection advance, fuel injection rate or control. pre and post heating candles, allowing to regulate their temperature according to the environmental conditions, in order to obtain the best possible compromise between a low consumption, a low level of pollution, a good pleasure of driving, a low sound level and good engine performance. This compromise between consumption, pollution, approval, noise and performance must be optimized regardless of the use of the engine, when starting the engine, when the engine is running at temperate, cold or hot outside temperatures or when high altitude engine operation.
[ooo3] Le document US 2010241341 décrit un procédé de commande de fonctionnement d'un moteur à combustion interne à partir d'une détermination de la température Tfc du fluide caloporteur du circuit de régulation thermique du moteur. Or, l'utilisation exclusive de la température Tfc du fluide caloporteur du circuit de régulation thermique du moteur pour la réalisation de commande de fonctionnement du moteur ne permet pas toujours de trouver le meilleur compromis entre consommation, pollution, agrément, bruit et performance. En effet, une température Tfc du fluide caloporteur de 10 °C à 0 m d'altitude implique une commande des paramètres de fonctionnement de type « moteur à température tempérée » alors que cette même température Tfc du fluide caloporteur à une altitude de 2000 m implique une commande des paramètres de fonctionnement de type « moteur froid ». Il est possible de corriger la commande à partir de paramètres additionnels tels que la pression Patm atmosphérique ambiante et/ou la température Tair de l'air ambiant, toutefois ce type d'ajustement pose des problèmes de mise au point. En effet, il est simple d'ajuster chacune de ces corrections de manière indépendante, en revanche la gestion de leurs interactions, lorsqu'elles varient simultanément, est difficile à maîtriser. Ces corrections en fonction de deux paramètres variables nécessitent de nombreuses heures de mise au point du moteur et engagent des coûts importants. [0004] Le problème technique à résoudre consiste donc en l'élaboration d'un procédé de commande de fonctionnement d'un moteur à combustion interne de type Diesel possédant un compromis entre consommation, pollution, agrément, bruit et performance amélioré et une mise au point facilitée. [Ooo3] The document US 2010241341 describes a method for controlling the operation of an internal combustion engine from a determination of the temperature Tfc of the heat transfer fluid of the thermal control circuit of the engine. However, the exclusive use of the temperature Tfc of the heat transfer fluid of the thermal control circuit of the engine for achieving engine operation control does not always find the best compromise between consumption, pollution, approval, noise and performance. Indeed, a temperature Tfc of the heat transfer fluid of 10 ° C at 0 m altitude implies a control of the operating parameters of the "temperate temperature engine" type whereas this same temperature Tfc of the coolant at an altitude of 2000 m implies a control of the operating parameters of the "cold engine" type. It is possible to correct the control from additional parameters such as Ambient Atmospheric Patm pressure and / or ambient air temperature, however this type of adjustment causes debugging problems. Indeed, it is simple to adjust each of these corrections independently, but the management of their interactions, when they vary simultaneously, is difficult to control. These corrections based on two variable parameters require many hours of engine tuning and incur significant costs. The technical problem to be solved therefore consists in the development of a method of operating control of a diesel-type internal combustion engine having a compromise between consumption, pollution, approval, noise and improved performance and a setting of point facilitated.
[ooo5] Il est proposé, selon un aspect de l'invention, un procédé de commande de fonctionnement d'un moteur à combustion interne de type Diesel comportant les étapes suivantes dans lesquelles: [Ooo5] It is proposed, according to one aspect of the invention, a method of operating control of a diesel type internal combustion engine comprising the following steps in which:
• on détermine une température du fluide caloporteur du circuit de régulation thermique du moteur,  A temperature of the heat transfer fluid of the thermal control circuit of the engine is determined,
· on détermine une pression atmosphérique ambiante et · An ambient atmospheric pressure is determined and
• on calcule une température modifiée dudit fluide caloporteur à partir de ladite température du fluide caloporteur et de la pression atmosphérique ambiante. A modified temperature of said heat transfer fluid is calculated from said temperature of the coolant and the ambient atmospheric pressure.
[ooo6] Le système de commande de fonctionnement d'un moteur à combustion interne de type Diesel, issu du procédé précédemment décrit, est caractérisé en qu'il comprend un moyen de détermination de la température du fluide caloporteur, un moyen de détermination de la pression atmosphérique ambiante et un moyen de calcul de la température modifiée du fluide caloporteur.  [Ooo6] The operating control system of a diesel type internal combustion engine, resulting from the process described above, is characterized in that it comprises a means for determining the temperature of the coolant, a means for determining the ambient atmospheric pressure and a means for calculating the modified temperature of the coolant.
[ooo7] Ainsi, la commande de fonctionnement d'un moteur à combustion interne de type Diesel utilisant non plus uniquement la température du fluide caloporteur, mais utilisant directement la pression atmosphérique Patm et la température du fluide caloporteur présente l'avantage d'introduire le paramètre de la pression atmosphérique au début du procédé ce qui permet de mieux adapter la commande de fonctionnement à la situation d'utilisation du moteur. De plus, la correction à apporter ne dépend plus que d'un seul paramètre ce qui facilite la mise au point du moteur. [ooo7] Thus, the operating control of a diesel-type internal combustion engine using not only the temperature of the coolant, but directly using the atmospheric pressure Patm and the temperature of the coolant has the advantage of introducing the parameter of the atmospheric pressure at the beginning of the process which makes it possible to better adapt the operation control to the use situation of the engine. In addition, the correction to be made only depends on a single parameter which facilitates the development of the engine.
[ooo8] L'invention sera mieux comprise à l'étude de quelques modes de réalisation décrits à titre d'exemples nullement limitatifs, et illustrés par les dessins annexés sur lesquels :  [Ooo8] The invention will be better understood in the study of some embodiments described by way of non-limiting examples, and illustrated by the accompanying drawings in which:
• La figure 1 représente le fonctionnement du procédé de commande à partir d'une pression atmosphérique ambiante et d'une température du fluide caloporteur de régulation thermique du moteur, selon un aspect de l'invention. • La figure 2 décrit un procédé de commande de fonctionnement d'un moteur, à partir d'une pression atmosphérique, d'une température du fluide caloporteur de régulation thermique du moteur, et comprenant une correction de ladite commande à partir d'au moins un paramètre additionnel. FIG. 1 represents the operation of the control method from an ambient atmospheric pressure and a temperature of the heat-transfer thermal control fluid of the engine, according to one aspect of the invention. FIG. 2 describes a method for controlling the operation of an engine, from an atmospheric pressure, of a temperature of the heat-transfer fluid for thermal regulation of the engine, and comprising a correction of said control from at least an additional parameter.
[ooo9] Le procédé de commande comporte les étapes illustrées sur la figure 1 . Lors d'une étape 1 , on détermine une température Tfc du fluide caloporteur de régulation thermique du moteur, par exemple à l'aide d'une sonde de mesure de température. Une étape 2 consiste en une détermination d'une pression Patm atmosphérique ambiante, par exemple à l'aide d'un capteur de pression. Une étape 3 consiste en une détermination d'une température Tm modifiée du fluide caloporteur. La température Tfc du fluide caloporteur est modifiée via une fonction de transfert dépendante de la température Tfc du fluide caloporteur et de la pression Patm atmosphérique ambiante. Cette fonction de transfert peut être déterminée de manière empirique et validée par des essais ou peut être issue de modélisation physique. La température Tm modifiée du fluide caloporteur est un meilleur indicateur des conditions d'utilisation du moteur que la température Tfc du fluide caloporteur. La température Tm modifiée du fluide caloporteur est ensuite transmise à une unité de commande électronique. La température Tm modifiée permet de mieux adapter la commande de fonctionnement aux conditions d'utilisation du moteur et ainsi d'obtenir un meilleur compromis entre consommation, pollution, agrément, bruit et performance.  [ooo9] The control method includes the steps illustrated in Figure 1. During a step 1, a temperature Tfc of the thermal control heat transfer fluid of the engine is determined, for example by means of a temperature measurement probe. A step 2 consists of a determination of an atmospheric pressure Patm ambient, for example using a pressure sensor. A step 3 consists of a determination of a modified temperature Tm of the coolant. The temperature Tfc of the heat transfer fluid is modified via a transfer function dependent on the temperature Tfc of the heat transfer fluid and the ambient atmospheric pressure Patm. This transfer function can be determined empirically and validated by tests or can be derived from physical modeling. The temperature Tm modified coolant is a better indicator of engine operating conditions than the temperature Tfc of the heat transfer fluid. The modified temperature Tm of the heat transfer fluid is then transmitted to an electronic control unit. The modified temperature Tm makes it possible to better adapt the operating control to the conditions of use of the engine and thus to obtain a better compromise between consumption, pollution, approval, noise and performance.
[ooi o] La figure 2 représente le procédé de commande de fonctionnement du moteur à partir de la température Tm modifiée comprenant, en outre, une étape optionnelle de correction, à partir d'un paramètre additionnel. Les trois premières étapes de ce procédé sont identiques à celles de la figure 1 .  [ooi o] Figure 2 shows the method of controlling the operation of the engine from the modified temperature Tm further comprising an optional correction step from an additional parameter. The first three steps of this process are identical to those of FIG.
[ooi i ] Lors d'une étape 1 , on détermine une température Tfc du fluide caloporteur de régulation thermique du moteur, par exemple à l'aide d'une sonde de mesure de température. Une étape 2 consiste en une détermination de la pression Patm atmosphérique ambiante, par exemple à l'aide d'un capteur de pression. Une étape 3 consiste en une détermination d'une température Tm modifiée du fluide caloporteur. La température Tfc du fluide caloporteur est modifiée via une fonction de transfert, déterminée empiriquement ou issue de modélisation physique, et dépendante de la température Tfc du fluide caloporteur et de la pression Patm atmosphérique ambiante. La température Tm modifiée du fluide caloporteur est ensuite transmise à une unité de commande électronique. Une commande de fonctionnement adaptée à la situation de fonctionnement du moteur est alors choisie parmi une pluralité de commandes prédéfinies. Une étape 4 de correction de la commande de fonctionnement du moteur permet d'optimiser la commande de fonctionnement précédemment sélectionnée. La modification de la commande de fonctionnement est établie via une fonction de transfert dépendante de paramètres additionnels. Un des paramètres additionnels peut comprendre la température Tair de l'air ambiant. La commande de fonctionnement ainsi modifiée est mieux adaptée aux conditions d'utilisation du moteur. [Ooi i] During a step 1, a temperature Tfc of the thermal control heat transfer fluid of the engine is determined, for example by means of a temperature measurement probe. A step 2 consists of a determination of the atmospheric pressure Patm ambient, for example using a pressure sensor. A step 3 consists of a determination of a modified temperature Tm of the coolant. The temperature Tfc of the heat transfer fluid is modified via a transfer function, determined empirically or from physical modeling, and dependent on the temperature Tfc of the heat transfer fluid and the atmospheric pressure Patm ambient. The modified temperature Tm of the heat transfer fluid is then transmitted to an electronic control unit. A command of operation adapted to the operating situation of the engine is then selected from a plurality of predefined commands. A step 4 for correcting the engine operation command optimizes the previously selected operation control. The modification of the operation command is established via a transfer function dependent on additional parameters. One of the additional parameters may include the temperature of the ambient air. The operation control thus modified is better adapted to the conditions of use of the engine.
[0012] La commande de fonctionnement selon l'invention présente l'avantage d'obtenir un meilleur compromis entre consommation, pollution, agrément, bruit et performance et de faciliter la mise au point du moteur puisqu'il n'y a qu'un seul paramètre correctif. The operation control according to the invention has the advantage of obtaining a better compromise between consumption, pollution, approval, noise and performance and facilitate the development of the engine since there is only one only corrective parameter.

Claims

REVENDICATIONS
Procédé de commande de fonctionnement d'un moteur à combustion interne de type Diesel caractérisé en ce qu'il comporte les étapes suivantes dans lesquelles: on détermine une température (Tfc) du fluide caloporteur d'un circuit de régulation thermique du moteur. A method of controlling the operation of a diesel-type internal combustion engine characterized in that it comprises the following steps in which: a temperature (Tfc) of the coolant of a thermal control circuit of the engine is determined.
on détermine une pression (Patm) atmosphérique ambiante an ambient atmospheric pressure (Patm) is determined
on calcule une température (Tm) modifiée dudit fluide caloporteur à partir de ladite température (Tfc) du fluide caloporteur et de ladite pression (Patm) atmosphérique ambiante. a modified temperature (Tm) of said heat transfer fluid is calculated from said temperature (Tfc) of the coolant and said ambient atmospheric pressure (Patm).
Procédé selon la revendication 1 caractérisé en ce qu'il comprend en outre une étape de commande des paramètres de fonctionnement du moteur à partir de ladite température (Tm) modifiée dudit fluide caloporteur. A method according to claim 1 characterized in that it further comprises a step of controlling the operating parameters of the engine from said modified temperature (Tm) of said heat transfer fluid.
Procédé selon la revendication 1 caractérisé en ce que ledit procédé comporte, en outre, une étape de correction de la commande de fonctionnement du moteur à partir d'un paramètre additionnel différent de la température (Tfc) du fluide caloporteur et de la pression (Patm) atmosphérique ambiante. A method according to claim 1 characterized in that said method further comprises a step of correcting the operation control of the engine from an additional parameter different from the temperature (Tfc) of the coolant and the pressure (Patm ) ambient atmospheric.
Procédé selon les revendications 1 et 3 caractérisé en ce que ledit paramètre additionnel comprend la température (Tair) de l'air ambiant. Process according to claims 1 and 3 characterized in that said additional parameter comprises the temperature (Tair) of the ambient air.
Système de commande de fonctionnement d'un moteur à combustion interne de type Diesel caractérisé en qu'il comprend un premier moyen de détermination de la température (Tfc) du fluide caloporteur un second moyen de détermination de la pression (Patm) atmosphérique ambiante et un troisième moyen de calcul de la température (Tm) du fluide caloporteur modifiée. A system for controlling the operation of a diesel-type internal combustion engine characterized in that it comprises a first means for determining the temperature (Tfc) of the coolant medium and a second means for determining the ambient atmospheric pressure (Patm) and a third means for calculating the temperature (Tm) of the modified heat transfer fluid.
PCT/FR2012/052473 2011-11-16 2012-10-26 Controlling the operation of a diesel internal combustion engine WO2013072590A1 (en)

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EP12794387.6A EP2780572B1 (en) 2011-11-16 2012-10-26 Controlling the operation of a diesel internal combustion engine

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FR1160458 2011-11-16
FR1160458A FR2982645B1 (en) 2011-11-16 2011-11-16 OPERATING CONTROL OF A DIESEL TYPE INTERNAL COMBUSTION ENGINE

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