EP1479896A1 - Verfahren zur Schätzung des Gasdruckes in einem Einlasskrümmer einer Brennkraftmaschine - Google Patents

Verfahren zur Schätzung des Gasdruckes in einem Einlasskrümmer einer Brennkraftmaschine Download PDF

Info

Publication number
EP1479896A1
EP1479896A1 EP04300282A EP04300282A EP1479896A1 EP 1479896 A1 EP1479896 A1 EP 1479896A1 EP 04300282 A EP04300282 A EP 04300282A EP 04300282 A EP04300282 A EP 04300282A EP 1479896 A1 EP1479896 A1 EP 1479896A1
Authority
EP
European Patent Office
Prior art keywords
engine
gas
intake
intake manifold
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04300282A
Other languages
English (en)
French (fr)
Inventor
M. Laurent Fontvieille
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP1479896A1 publication Critical patent/EP1479896A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature

Definitions

  • the subject of the present invention is a method allowing estimation of the exhaust gas pressure in a manifold internal combustion engine intake fitted with a set turbocharger comprising a compressor and a variable geometry turbine.
  • the invention also relates to a device for controlling the operation of a combustion engine internal.
  • the invention can be applied to different types of engine, Beau de Rochas cycle or Diesel cycle, supercharged or not.
  • the control of the operation of a combustion engine internal is to manage the engine from a set of sensors and actuators. All the control laws in the form of software strategy and characterization parameters in the form of engine calibration are usually stored in a computer in the form of a control unit electronic (UCE).
  • UCE control unit electronic
  • the engine may include a turbocharger assembly provided with a turbine and a compressor intended to increase the amount of air admitted into the engine cylinders.
  • a turbocharger assembly provided with a turbine and a compressor intended to increase the amount of air admitted into the engine cylinders.
  • two turbines are placed at the outlet of the gas collectors engine exhaust so as to be entrained by gases exhaust from the two engine cylinder banks.
  • the outputs of two banks of cylinders are connected downstream of the two turbines.
  • the power supplied by the exhaust gases to the turbines can be modulated by installing relief valves or by providing turbines fitted with blades with variable orientation so as to constitute a variable geometry turbocharger (TGV).
  • TSV variable geometry turbocharger
  • Each compressor is mounted on a mechanical axis receiving also the turbine so that the two compressors compress the air entering the intake manifold.
  • a heat exchanger can be placed between the compressors and the intake manifold common to the two cylinder banks so to cool the compressed air at the outlet of the compressors.
  • Actuators are used to control the opening and closing the relief valves or orienting the fins of the turbines so as to modify the geometry of said turbines.
  • the control signals of these actuators are supplied by the control unit electronic control (ECU) and allow in particular to control the pressure in the intake manifold.
  • ECU control unit electronic control
  • twin-turbo V engine architecture where the two compressors compress the air in an intake common to all cylinders, it is important to master well balancing of the two turbochargers. Indeed, in phase transient, the two compressors must participate in the development of the supercharging instruction without interaction of one on the other. In stabilized operation, the two compressors must rotate at the same speed to provide the same operating conditions on the two banks of cylinders.
  • the amount of nitrogen oxides produced is mainly related to the composition of the reactive mixture in the engine cylinders, a mixture that contains air, fuel and inert gases. These inert gases do not participate in the combustion and come from a circuit deriving part of the gases exhaust to the intake system to reduce the amount nitrogen oxides in the exhaust gas.
  • This branch circuit allowing the recirculation of part of the exhaust gases, says "EGR circuit” includes a valve which allows to modulate the quantity of exhaust gas recycled into the intake manifold.
  • a particulate filter in the pipeline exhaust.
  • a filter includes a set of microchannels in which a large part of the particles is trapped.
  • the filter When the filter is saturated with particles, it should be emptied in burning the particles during a regeneration phase which can be implemented by means of a heating device or by a specific engine setting.
  • Such regulation of the engine supercharging thermal is therefore usually done by slaving of the pressure in the intake manifold on a pressure setpoint stored in the electronic control unit UCE.
  • the instruction of pressure can for example result from a mapping according to the engine rotation speed and injected fuel flow, cartography which is memorized in the electronic control unit.
  • a regulation device for example of the PID type (proportional, integral, derivative) can then regulate the manifold pressure intake from the setpoint, by acting on the orientation of the fins so as to modify the geometry of the turbines.
  • the regulation compensates for the decrease in the rate expansion of the turbines by increasing the pressure prevailing in the intake manifold and therefore in the exhaust gases upstream turbines.
  • Such regulation is satisfactory although there is no control of the absolute value of the pressure prevailing in the gases exhaust upstream of the turbines.
  • the pressure in the intake manifold is subject to a setpoint.
  • the setpoint can be mapped in dependent on engine speed and fuel flow.
  • a regulator is responsible for regulating the pressure in the intake manifold on the setpoint. It is therefore necessary to know the pressure in the intake manifold.
  • a sensor can be provided for this purpose.
  • the object of the present invention is to solve the difficulties encountered with known devices and allow a economic determination of the gas pressure in the manifold intake.
  • the present invention also relates to a method and a device for precise determination of the prevailing pressure in the intake manifold.
  • the manifold pressure estimation process intake of an internal combustion engine comprises a step of calculating the gas flow rate in the engine, a step of calculating the mass of gas in the circuit intake, and a step of calculating the pressure in the manifold intake system knowing the gas temperature in the manifold intake.
  • a step of calculating the gas flow in the engine from a measurement of the engine speed, and a measurement of the gas temperature in the manifold.
  • a step of calculating the gas flow rate in the engine from a engine filling efficiency map taking into account a measurement of the engine speed, a measurement of the temperature of the gas in the intake manifold, and an earlier estimate of the pressure in the intake manifold.
  • the gas flow in the motor is equal to a constant near the product of the speed of the engine, engine displacement, previous estimate of pressure in the intake manifold, a map of the engine filling efficiency divided by gas temperature in the collector.
  • the pressure in the intake manifold is equal to the pressure atmospheric.
  • a step of calculating the mass of gas in the intake circuit from integration of the difference between a gas flow measurement into an inlet flow meter and calculating the gas flow through the engine.
  • the mass of gas in the intake circuit is equal to the maximum of the integral of the difference between a gas flow measurement in a flow meter input and calculation of the gas flow in the engine, and the quotient at a constant near atmospheric pressure by the temperature of gas in the intake manifold.
  • a step of calculating an estimated pressure in the intake manifold from the calculation of the mass of gas in the intake circuit and a measurement of the gas temperature in the intake manifold.
  • the estimated pressure in the intake manifold is equal to the product to within a constant the mass of gas in the intake circuit and the temperature of the gas in the intake manifold.
  • the invention also provides a device for monitoring and control of an internal combustion engine, comprising means for measurement of the gas temperature in the intake manifold, a means for calculating the gas flow in the engine, means for calculating the mass of gas in the intake circuit, and a means of calculating the pressure in the intake manifold.
  • the monitoring and control device is adapted to the control of the operation of an internal combustion engine motor vehicle equipped with a turbocharger assembly supercharging comprising a compressor and a geometry turbine variable, the compressor supplying the engine with air at a pressure higher than atmospheric pressure and the turbine being crossed by exhaust gases from the engine.
  • the device includes an electronic control unit (UCE) capable of performing calculations from stored data and of measured values and sensors to measure in particular the flow of air entering the engine, the fuel flow supplying the engine and the instantaneous geometry of the turbine.
  • the control unit electronics includes means for iteratively calculating a estimated value of the gas pressure in the intake manifold in upstream of the engine cylinders. Atmospheric pressure is determined by means of a sensor which may be in the unit of electronic control.
  • the invention also provides an internal combustion engine comprising an intake circuit provided with a manifold, at least one cylinder, and a control and command device comprising a means of measuring the gas temperature in the manifold intake, a means of calculating the gas flow in the engine, a means for calculating the mass of gas in the intake circuit, and a means of calculating the pressure in the intake manifold.
  • the internal combustion engine may include one or two turbocharger assemblies supplying the engine with compressed air by a single intake manifold.
  • the device is particularly suitable for a diesel engine, whose exhaust pipe is fitted with a particulate filter.
  • FIG. 1 there is shown a diesel engine 1 to four cylinders, each cylinder being associated with an injection device for fuel, referenced 2.
  • Fresh air entering the distributor intake 3 of engine 1 first passes through a turbocharger 4 comprising a compressor 5 and a turbine 6 mounted on a shaft common 7.
  • the flows supplied by the compressor 7 and the turbine 6 can be modulated by a device, not illustrated in the figure, which may for example include a means of changing the orientation internal fins of compressor 5 and / or turbine 6.
  • Fresh air taken from the outside first passes through an air filter 8, then a flow meter 9, before entering compressor 5. Circulation of air at atmospheric pressure is symbolized in FIG. 1 by the arrows 10.
  • the compressed air coming from compressor 5 passes through, in the example illustrated, a heat exchanger 11 which makes it possible to cool gas admitted.
  • the compressed compressed air passes through a three-way valve 12 capable of regulating a flow of exhaust gas recirculation before entering the intake manifold 3.
  • the flow of compressed air is symbolized by the arrows 13 in FIG. 1.
  • the exhaust gases from the exhaust manifold 14, after combustion in engine 1, are partly directed towards the valve 12, in order to be partly recirculated after mixing in the air 13 directed to the intake manifold 3.
  • the other party exhaust gases, the flow of which is symbolized by the arrow 15, is brought to the turbine 6 in order to drive the compressor 5.
  • the exhaust gases, the flow of which is symbolized by the arrow 16, cross, in the example illustrated, a particle filter 17 before being released into the atmosphere by the pot exhaust 18.
  • An electronic control unit (ECU) referenced 19 receives various signals allowing the operation of the regulation device of the invention.
  • the electronic control unit 19 receives in particular by connection 20 a position signal from an accelerator pedal actuated by the driver.
  • the fresh air flow Q deb measured by the flow meter 9, is brought in the form of a signal by the connection 21 to the electronic control unit 19.
  • a temperature sensor 22, placed in the intake manifold 3, allows the temperature of the gases to be measured before they enter the cylinders, which will be called T col .
  • the signal corresponding to this temperature is transmitted to the electronic control unit 19 by the connection 23.
  • the electronic control unit also receives, via the connections 24 and 25, information concerning the engine rotation speed N word and the air temperature T air in the flow meter 9.
  • the electronic control unit 19 comprises a sensor 26 for atmospheric pressure P atmo ⁇
  • the electronic control unit 19 transmits different signals allowing the management of the operation of engine 1 as well as other parts of the vehicle, not shown in the figure.
  • the unit of electronic control transmits in particular through connection 27, a control command signal for valve 12.
  • the control unit electronics also transmits, via connection 28, a signal control for a regulator of the fuel flow injected into the engine 1 by the different injection devices 2.
  • the estimation of the pressure in the manifold P col includes a first step of calculating the air flow sucked in by the engine Q word .
  • Q word N word * V cyl * P col / (R air * T col * 120) * ⁇ v ⁇ N word , P coolant / (R air * T col ) ⁇
  • V cyl is the engine displacement.
  • a air is the mass constant of air, ie 287.
  • P coolant is the manifold pressure estimated previously.
  • ⁇ v is a map of the engine filling efficiency as a function of the engine speed and of the quotient of the manifold pressure previously estimated by the product of the temperature measured in the manifold and the mass constant of the air.
  • M adm Max ⁇ (Q deb - Q word ) dt, P atm * V adm / (R air * T col ) ⁇ with V adm the volume of the intake circuit.
  • R air , V cyl , V adm are constant and known by the electronic control unit 19.
  • the cost of the components of the engine and simplify the intake manifold We increase reliability of the electronic control unit by removing a sensor, therefore a potential source of failure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP04300282A 2003-05-22 2004-05-17 Verfahren zur Schätzung des Gasdruckes in einem Einlasskrümmer einer Brennkraftmaschine Withdrawn EP1479896A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0306173A FR2855216B1 (fr) 2003-05-22 2003-05-22 Procede d'estimation de la pression des gaz dans un collecteur d'admission de moteur a combustion interne et dispositif de commande d'un tel moteur
FR0306173 2003-05-22

Publications (1)

Publication Number Publication Date
EP1479896A1 true EP1479896A1 (de) 2004-11-24

Family

ID=33042020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04300282A Withdrawn EP1479896A1 (de) 2003-05-22 2004-05-17 Verfahren zur Schätzung des Gasdruckes in einem Einlasskrümmer einer Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP1479896A1 (de)
FR (1) FR2855216B1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2329040A (en) * 1996-06-03 1999-03-10 Nissan Motor Apparatus for estimating pressure in intake system and exhaust system of internal combustion engine
US20010013335A1 (en) * 1997-12-01 2001-08-16 Hitachi, Ltd. Engine control apparatus
US20020078924A1 (en) * 2000-11-06 2002-06-27 Toyoji Yagi Control system for an internal combustion engine
FR2821388A1 (fr) * 2001-02-28 2002-08-30 Renault Procede de calcul de la masse d'air admise dans le cylindre d'un moteur a combustion interne equipant un vehicule automobile et calculateur d'injection mettant en oeuvre le procede
EP1247967A2 (de) * 2001-04-05 2002-10-09 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Bestimmen des Luftmassenstroms vom Saugrohr in den Zylinder einer Brennkraftmaschine
FR2824596A1 (fr) * 2001-05-14 2002-11-15 Renault Procede pour estimer le debit d'air dans un moteur et dispositif de controle du fonctionnement d'un tel moteur
EP1267060A2 (de) * 2001-06-14 2002-12-18 Nissan Motor Company, Limited Vorrichtung und Methode zur Bestimmung der Einlassluftmenge im Kolben einer Brennkraftmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2329040A (en) * 1996-06-03 1999-03-10 Nissan Motor Apparatus for estimating pressure in intake system and exhaust system of internal combustion engine
US20010013335A1 (en) * 1997-12-01 2001-08-16 Hitachi, Ltd. Engine control apparatus
US20020078924A1 (en) * 2000-11-06 2002-06-27 Toyoji Yagi Control system for an internal combustion engine
FR2821388A1 (fr) * 2001-02-28 2002-08-30 Renault Procede de calcul de la masse d'air admise dans le cylindre d'un moteur a combustion interne equipant un vehicule automobile et calculateur d'injection mettant en oeuvre le procede
EP1247967A2 (de) * 2001-04-05 2002-10-09 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Bestimmen des Luftmassenstroms vom Saugrohr in den Zylinder einer Brennkraftmaschine
FR2824596A1 (fr) * 2001-05-14 2002-11-15 Renault Procede pour estimer le debit d'air dans un moteur et dispositif de controle du fonctionnement d'un tel moteur
EP1267060A2 (de) * 2001-06-14 2002-12-18 Nissan Motor Company, Limited Vorrichtung und Methode zur Bestimmung der Einlassluftmenge im Kolben einer Brennkraftmaschine

Also Published As

Publication number Publication date
FR2855216B1 (fr) 2005-07-01
FR2855216A1 (fr) 2004-11-26

Similar Documents

Publication Publication Date Title
EP1989426B1 (de) Verfahren und vorrichtung zur luftaufladungsegelung eines verbrennungsmotors
FR2874237A1 (fr) Procede et dispositif de gestion d'un moteur a combustion interne
FR2915237A1 (fr) Systeme et procede de commande d'un turbocompresseur de suralimentation pour moteur a combustion interne
EP2361349B1 (de) Verfahren zur dynamischen schätzung der frischluftdurchflussrate, die einem motor mit hochdruck- und niederdruck-agr-kreisen zugeführt wird.
EP2507494A1 (de) Verfahren zur überwachung einer zweiphasigen turboladung durch turbolader mit fixer geometrie und einem dynamischen kalkukator sowie vorturbinendruckbegrenzung
FR2915239A1 (fr) Procede d'estimation et systeme de controle du taux d'egr sur un moteur equipe de deux collecteurs d'admission, d'un volet de swirl en amont du collecteur sans egr et d'un volet d'admission en amont du collecteur avec egr.
FR2947007A1 (fr) Procede et systeme de commande d'un moteur avec estimation dynamique du debit d'air frais d'alimentation.
WO2007045781A1 (fr) Système et procédé de commande d'un turbocompresseur de suralimentation pour moteur à combustion interne
FR2868127A1 (fr) Procede et systeme de commande du fonctionnement d'un moteur a combustion interne de vehicule automobile equipe d'un ensemble turbocompresseur de suralimentation
FR2903147A1 (fr) Procede de regulation de la pression de suralimentation dans un moteur de vehicule
FR2860836A1 (fr) Procede de gestion de l'alimentation en air d'un moteur, destine notamment a la gestion d'un moteur turbocompresse
EP1479896A1 (de) Verfahren zur Schätzung des Gasdruckes in einem Einlasskrümmer einer Brennkraftmaschine
FR2923538A3 (fr) Systeme et procede d'estimation de la pression en amont d'une turbine de turbocompresseur et moteur thermique associ associe
FR2905408A1 (fr) Procede de commande pour moteur suralimente
FR2882576A1 (fr) Procede de regulation optimise en phase transitoire dans un turbocompresseur
FR2911918A1 (fr) Systeme et procede de commande d'un turbocompresseur d'un moteur a combustion interne
FR2853693A1 (fr) Procede d'estimation de la pression des gaz en amont d'une turbine de moteur a combustion interne suralimente et dispositif de commande d'un tel moteur
EP1574694B1 (de) Vorrichtung und Verfahren zur Kraftstoffeinspritzmengenregelung in einem Dieselmotor
EP1828578B1 (de) Verfahren zur steuerung einer aufgeladenen maschine
WO2010128227A1 (fr) Systeme et procede de commande de la suralimentation d'un moteur a combustion interne
FR2874968A1 (fr) Procede de commande d'une pression de suralimentation dans un moteur de vehicule
FR2923537A1 (fr) Systeme et procede d'estimation de la pression en aval d'une turbine de turbocompresseur et moteur thermique associe
FR2888884A1 (fr) Procede et systeme de controle de la suralimentation en air d'un moteur a combustion interne de vehicule automobile
FR2854437A1 (fr) Dispositif et procede de regulation de la pression de suralimentation dans un moteur a combustion interne equipe d'un systeme turbocompresseur a deux etages
FR2837526A1 (fr) Systeme et procede de commande d'un moteur suralimente en air par deux turbocompresseurs

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20050520

AKX Designation fees paid

Designated state(s): BE DE ES GB IT

17Q First examination report despatched

Effective date: 20140123

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20190319