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WO2009043513A1 - Procédé d'estimation d'un taux externe de recyclage des gaz d'échappement - Google Patents

Procédé d'estimation d'un taux externe de recyclage des gaz d'échappement Download PDF

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Publication number
WO2009043513A1
WO2009043513A1 PCT/EP2008/008074 EP2008008074W WO2009043513A1 WO 2009043513 A1 WO2009043513 A1 WO 2009043513A1 EP 2008008074 W EP2008008074 W EP 2008008074W WO 2009043513 A1 WO2009043513 A1 WO 2009043513A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
gas recirculation
combustion chamber
recirculation rate
temperature
Prior art date
Application number
PCT/EP2008/008074
Other languages
German (de)
English (en)
Inventor
Markus Beisswenger
Philipp Klein
Michael Mladek
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2009043513A1 publication Critical patent/WO2009043513A1/fr

Links

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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control
    • F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
    • F02D35/026—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures using an estimation
    • 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
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
    • 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
    • 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
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control
    • F02D2041/0067—Determining the EGR temperature
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • 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
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to a method for estimating an external exhaust gas recirculation rate.
  • the invention has for its object to provide an improved method for estimating an external exhaust gas recirculation rate.
  • the external exhaust gas recirculation rate is iteratively updated based on an. ⁇ rcnnr ⁇ u: ⁇ itern ⁇ e.LciLur estimated, wherein the updated combustion chamber temperature is determined from a predetermined combustion chamber temperature.
  • the predetermined combustion chamber temperature is used as the output variable of a first method.
  • an exhaust gas temperature of the recirculated exhaust gas present on the exhaust side of an exhaust gas recirculation cooler is determined by means of the external exhaust gas recirculation rate and a recirculated exhaust gas mass flow. From this, a Saugrohrtemperatur is then determined.
  • the updated combustion chamber temperature is determined from this intake manifold temperature.
  • the updated combustion chamber temperature is used in the further course as an output variable for carrying out the first method.
  • the first and second methods are repeated until a predetermined abort criterion or a fixed number of repetitions has been reached.
  • the method according to the invention combines the two methods and thermodynamic basic equations into an iterative method.
  • FIG. 3 schematically shows a flowchart for a determination of an external exhaust gas recirculation rate.
  • Figure 1 illustrates the arrangement showing the fresh air supply to an internal combustion engine 1, its exhaust discharge and exhaust gas recirculation.
  • fresh air L flows through at a temperature T at the b sin air filter 2.
  • an air mass meter 3 detects a fresh air mass flow m L and a temperature Ti of the intake fresh air L and a pressure P 1 .
  • the fresh air L is an air compressor, z. B. an exhaust gas turbocharger 4, fed and compressed, then cooled by means of a charge air cooler 5 and metered by means of a throttle valve 6 of the internal combustion engine 1 fed. At the throttle valve 6, a fresh air temperature T 2 and a fresh air pressure p 2 are detected.
  • a resulting from a combustion of a fuel in the internal combustion engine 1 exhaust gas A is removed by means of an exhaust system 7 and drives the exhaust gas turbocharger 4 at. Furthermore, by means of a sensor, in particular a lambda probe, a residual oxygen content of the exhaust gas A is determined in order to indicate a ratio of the fresh air L to the supplied fuel for combustion. This ratio is described on the basis of a lambda value ⁇ a .
  • a portion of the exhaust gas A is dosed via a Abgasruckbowungsventil 8 of fresh air L. As a result, a complete combustion and consequent reduction of nitrogen oxides in the exhaust gas A are achieved.
  • an exhaust gas temperature T3 and an exhaust gas pressure P 3 are measured.
  • the exhaust gas A is cooled using a Abgasruckbowungskuhlers 9 of the fresh air L admixed.
  • a suction pipe temperature T 2 , SR is additionally determined.
  • Figure 2 shows dependencies in the modeling of the combustion chamber temperature T- 80 at a crank angle of -80 °. It is based on the combustion chamber temperature T-so and one, z. B. on the basis of pressure sensors, measured cylinder pressure p-so an aspirated fresh air mass m An determined.
  • the crank angle describes the angular offset of a crankshaft with respect to an initial position at which a piston of the internal combustion engine 1 is at a top dead center.
  • the external exhaust gas recirculation rate X AGR and the recirculated exhaust gas mass flow m EGR are determined from the intake fresh air mass m An .
  • the exhaust gas temperature T 3 , ⁇ present on the exhaust gas side of the exhaust gas cooler 9 is calculated in the further course. From the exhaust gas temperature T 3 , ⁇ the intake manifold temperature T 2 , SR is derived, which serves as an output variable for a second, empirical method 2.
  • Combustion chamber temperature T-so, k + i determined. This updated combustion chamber temperature T_ 8 o, k + i is used in the further course of the iterative method according to the invention as the output variable of the first method Vl.
  • the iteration of the method according to the invention is carried out because to determine the intake fresh air mass m AN and the external exhaust gas recirculation rate X EGR the
  • FIG. 3 shows a signal flow for determining the external exhaust gas recirculation rate X AGR on the basis of the flowchart.
  • R L represents the specific gas constant of air.
  • the charge efficiency ⁇ c indicates a measure of a quality of a cylinder charge. It is defined as a ratio of minimum required mass m m to actual mass m dead in the combustion chamber 10 of the internal combustion engine 1 according to:
  • a constant C depends on a rotational speed N and a position of a combustion center H 50
  • pr 0 represents an offset-corrected pressure ratio
  • the external exhaust gas recirculation rate X EGR is based on an estimate of: x AGR, k ⁇ ' ⁇ 7c, * .-, _ Z 1 . ⁇ - [4:
  • L indicates st a stoichiometric air / fuel ratio and CoC denotes a completeness of combustion.
  • the intake fresh air mass m L , k and the exhaust gas mass m AGR , y in the combustion chamber 10 can be calculated according to:
  • the exhaust gas temperature T 3 , ⁇ present on the output side at the exhaust gas recirculation cooler 9 can be determined according to:
  • V2 Based on the empirical second method V2 can be from the intake manifold temperature T 2 , S R a temperature T ÜT , k at a bottom dead center of the piston of the internal combustion engine 1 and in conjunction with an approximately polytropic compression, the updated combustion chamber temperature T_ 8 o, k + i determine according to:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un procédé d'estimation d'un taux externe de recyclage des gaz d'échappement (XAGR) consistant à estimer le taux externe de recyclage des gaz d'échappement (XAGR) de façon itérative sur la base d'une température de chambre de combustion actualisée (T-80,k+1), la température de chambre de combustion actualisée (T-80,k+1) étant déterminée à partir d'une température de chambre de combustion prédéfinie (T-80).
PCT/EP2008/008074 2007-09-27 2008-09-24 Procédé d'estimation d'un taux externe de recyclage des gaz d'échappement WO2009043513A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007046146A DE102007046146A1 (de) 2007-09-27 2007-09-27 Verfahren zur Schätzung einer externen Abgasrückführrate
DE102007046146.3 2007-09-27

Publications (1)

Publication Number Publication Date
WO2009043513A1 true WO2009043513A1 (fr) 2009-04-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/008074 WO2009043513A1 (fr) 2007-09-27 2008-09-24 Procédé d'estimation d'un taux externe de recyclage des gaz d'échappement

Country Status (2)

Country Link
DE (1) DE102007046146A1 (fr)
WO (1) WO2009043513A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160076467A1 (en) * 2014-09-12 2016-03-17 Man Truck & Bus Ag Combustion Engine, In Particular Gas Engine, For a Vehicle, In Particular For a Commercial Vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029176A1 (de) 2009-09-03 2011-03-17 Robert Bosch Gmbh Verfahren zur Bestimmung einer Abgasrückführrate und Verfahren zur Bestimmung einer in einer Brennkraftmaschine verwendeten Kraftstoffart

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1024262A2 (fr) * 1999-01-26 2000-08-02 Ford Global Technologies, Inc. Méthode d'estimation de débit massique d'air d'un moteur diesel turbochargé avec recirculation de gaz d'échappement
DE10213138A1 (de) * 2001-11-20 2003-05-28 Bosch Gmbh Robert Verfahren, Computerprogramm, Steuer- und/oder Regelgerät zum Betreiben einer Brennkraftmaschine
WO2003065135A1 (fr) * 2002-01-31 2003-08-07 Cambridge Consultants Limited Systeme de commande
EP1528241A2 (fr) * 2003-10-29 2005-05-04 Nissan Motor Co., Ltd. Estimation de température du gaz d'admission dans moteur à combustion interne
EP1662121A1 (fr) * 2004-11-30 2006-05-31 Peugeot Citroën Automobiles S.A. Procédé de régulation d'un système d'admission d'un moteur à combustion interne et véhicule automobile pour la mise en oeuvre du procédé
WO2006064154A1 (fr) * 2004-12-17 2006-06-22 Peugeot Citroen Automobiles Sa Procede de determination de la masse des gaz brules residuels restant dans le cylindre d'un moteur a combustion interne

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1024262A2 (fr) * 1999-01-26 2000-08-02 Ford Global Technologies, Inc. Méthode d'estimation de débit massique d'air d'un moteur diesel turbochargé avec recirculation de gaz d'échappement
DE10213138A1 (de) * 2001-11-20 2003-05-28 Bosch Gmbh Robert Verfahren, Computerprogramm, Steuer- und/oder Regelgerät zum Betreiben einer Brennkraftmaschine
WO2003065135A1 (fr) * 2002-01-31 2003-08-07 Cambridge Consultants Limited Systeme de commande
EP1528241A2 (fr) * 2003-10-29 2005-05-04 Nissan Motor Co., Ltd. Estimation de température du gaz d'admission dans moteur à combustion interne
EP1662121A1 (fr) * 2004-11-30 2006-05-31 Peugeot Citroën Automobiles S.A. Procédé de régulation d'un système d'admission d'un moteur à combustion interne et véhicule automobile pour la mise en oeuvre du procédé
WO2006064154A1 (fr) * 2004-12-17 2006-06-22 Peugeot Citroen Automobiles Sa Procede de determination de la masse des gaz brules residuels restant dans le cylindre d'un moteur a combustion interne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160076467A1 (en) * 2014-09-12 2016-03-17 Man Truck & Bus Ag Combustion Engine, In Particular Gas Engine, For a Vehicle, In Particular For a Commercial Vehicle
US10436130B2 (en) * 2014-09-12 2019-10-08 Man Truck & Bus Ag Combustion engine, in particular gas engine, for a vehicle, in particular for a commercial vehicle

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