EP1931868B1 - Verfahren zur schätzung der von jedem zylinder eines verbrennungsmotors erzeugten momentanen geschwindigkeit - Google Patents

Verfahren zur schätzung der von jedem zylinder eines verbrennungsmotors erzeugten momentanen geschwindigkeit Download PDF

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Publication number
EP1931868B1
EP1931868B1 EP06808149.6A EP06808149A EP1931868B1 EP 1931868 B1 EP1931868 B1 EP 1931868B1 EP 06808149 A EP06808149 A EP 06808149A EP 1931868 B1 EP1931868 B1 EP 1931868B1
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EP
European Patent Office
Prior art keywords
cylinders
coefficients
real time
produced
estimation
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.)
Not-in-force
Application number
EP06808149.6A
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English (en)
French (fr)
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EP1931868A1 (de
Inventor
Nicolas Petit
Pierre Rouchon
Jonathan Chauvin
Gilles Corde
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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Publication of EP1931868A1 publication Critical patent/EP1931868A1/de
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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
    • F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • F02D2041/286—Interface circuits comprising means for signal processing
    • F02D2041/288—Interface circuits comprising means for signal processing for performing a transformation into the frequency domain, e.g. Fourier transformation
    • 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
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F02D2200/1004—Estimation of the output torque
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D41/1402—Adaptive control

Definitions

  • the present invention relates to a method for estimating in real time the instantaneous speed produced by each cylinder of an internal combustion engine from the instantaneous speed sensor located at the end of the transmission.
  • Estimating the average torque produced by each cylinder is important for all vehicles, whether they are petrol or diesel engines. In the first case, it conditions a good combustion of the mixture when the richness is close to one, and therefore sensitive to cylinder-to-cylinder difference problems. In the second case, the interest of the knowledge of the couple allows a rebalancing to obtain an optimum operation. In particular, catalysts using a NOx trap lose their effectiveness over time. In order to return to optimum efficiency, the torque of each of the cylinders must be kept identical for a few seconds, then return to normal operation at a lean mixture. The DeNOx catalysis depollution therefore requires precise control of the cylinder-by-cylinder torque.
  • an instantaneous speed sensor is placed at the end of the transmission. This measurement is very distorted by the transmission and is noisy.
  • the method according to the invention proposes to define an estimator operating from the measurement at the end of the transmission chain to estimate the instantaneous speed under each of the cylinders.
  • the invention relates to a method for estimating in real time the instantaneous speed produced by each of the cylinders of an internal combustion engine comprising at least one transmission system connected to the cylinders and a sensor which realizes a measurement ( x 1 ) in real time. instantaneous regime at the end of said transmission system.
  • the method according to the invention can be applied to an engine control to adapt the fuel masses injected into each of the cylinders, in order to adjust the average torque produced by each of the cylinders.
  • the method according to the invention makes it possible to estimate the instantaneous speed produced by each of the cylinders of an internal combustion engine comprising at least one transmission system connected to the cylinders.
  • a sensor realizes a measurement of the instantaneous speed in real time. This signal is noted x 1 .
  • An instantaneous speed measurement under the cylinders deformed by the transmission shaft is therefore performed.
  • the first step of the invention is therefore to "reverse" the effects of the transmission to obtain the relevant information, that is to say the instantaneous speed produced by each of the cylinders.
  • This relevant information is a periodic signal that we note x 0 .
  • This equation (2) constitutes the physical model representing in real time the dynamics of the transmission system.
  • An estimate of the signal w 0 makes it possible to determine an estimate of the signal x 0 from equation (1).
  • the method according to the invention characterizes this signal x 0 by quasi-invariant parameters over time.
  • the signal x 0 is defined using parameters which, at a given moment, are constants.
  • the signal x 0 is mechanically periodic.
  • a signal is thus defined translating the instantaneous regime x 0 , as a function of the parameters d j , invariant over time.
  • the system of equations (5) represents an adaptive-type nonlinear estimator for estimating the coefficients c j of the Fourier coefficient decomposition of the signal w 0 .
  • This estimator (5) was constructed from the variable change w 0 , but it is obvious that in the same way it is possible to construct an adaptive-type nonlinear estimator directly from x 0 .
  • the estimator (5) makes it possible to reconstruct w 0 through its Fourier coefficients c j .
  • the goal is to rebuild x 0 .
  • the knowledge of the average torque produced by each cylinder is a fundamental and relevant information for the estimation of the combustion; it is the image of the combustion that the engine sees.
  • the previous estimator (5) allows us to estimate the signal of the regime under the cylinders but also its Fourier decomposition. However, the more torque is important the greater the excitement on the tree. In this sense it is possible to correlate the torque produced by the cylinder and the Fourier coefficients of the decomposition of the instantaneous regime signal ( x 0 ).
  • the figure 1 illustrates the estimate (R is ) of the instantaneous regime x 0 under the cylinders from the estimator according to the invention (5) previously described on an operating point at 1250rpm average load.
  • the figure 1 also illustrates the reference instantaneous speed R ref (calculated from the cylinder pressure measurements on the engine test bench). We observe a very good estimate of the signal.
  • the figure2 illustrates the estimation ( PMI est ) of the cylinder-to-cylinder torque on an operating point at 1500tr / min, from the estimator according to the invention (5) and a function ⁇ defined by equation (7) .
  • the figure 2 also illustrates the average reference torque ( PMI ref ) (calculated from cylinder pressure measurements on the engine test bench). We observe a very good estimate of the signal.
  • the adaptive filter thus produced is efficient, and above all does not require any additional adjustment in the case of change of the operating point. No identification phase is necessary, only a measurement and model noise adjustment must be carried out, once and only once
  • An engine control can thus, from the reconstructed couples, adapt the fuel masses injected into each of the cylinders so that the pairs are balanced in all the cylinders.

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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Testing Of Engines (AREA)

Claims (3)

  1. Verfahren zum Schätzen in Echtzeit der Momentandrehzahl, die von jedem der Zylinder eines Verbrennungsmotors erzeugt wird, das wenigstens ein Kraftübertragungssystem aufweist, das mit den Zylindern verbunden ist, und einen Sensor, der in Echtzeit eine Messung (x1) der Momentandrehzahl am Ende des Kraftübertragungssystems ausführt, dadurch gekennzeichnet, dass es die folgenden Schritte aufweist:
    a) Bauen eines physikalischen Modells, das in Echtzeit die Dynamik des Kraftübertragungssystems darstellt in Abhängigkeit: von dem Kurbelwellenwinkel, der Messung (x1), Koeffizienten einer Aufschlüsselung in Fourier-Serien der Momentandrehzahl, die von jedem der Zylinder erzeugt wird, und in Abhängigkeit von einer Dämpfung und einer Eigenfrequenz, die das Kraftübertragungssystem auszeichnet,
    b) Bestimmen in Echtzeit der Koeffizienten der Aufschlüsselung in Fourier-Serien, indem das Modell mit einem nicht linearen Schätzer des adaptiven Typs gekoppelt wird und,
    c) Ausführung einer Schätzung in Echtzeit der Momentandrehzahl, die von jedem der Zylinder erzeugt wird, ausgehend von den Fourier-Koeffizienten.
  2. Verfahren nach Anspruch 1, bei dem man in Echtzeit das mittlere Moment jedes der Zylinder ausgehend von der Schätzung der Koeffizienten schätzt.
  3. Verfahren nach den vorhergehenden Ansprüchen zum Anpassen durch eine Motorsteuerung der Kraftstoffmassen, die in jeden der Zylinder eingespritzt werden, um das mittlere Moment, das von jedem der Zylinder erzeugt wird, zu regeln.
EP06808149.6A 2005-09-20 2006-09-18 Verfahren zur schätzung der von jedem zylinder eines verbrennungsmotors erzeugten momentanen geschwindigkeit Not-in-force EP1931868B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0509624A FR2891012B1 (fr) 2005-09-20 2005-09-20 Methode d'estimation du regime instantane produit par chacun des cylindres d'un moteur a combustion interne
PCT/FR2006/002127 WO2007034057A1 (fr) 2005-09-20 2006-09-18 Methode d’estimation du regime instantane produit par chacun des cylindres d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1931868A1 EP1931868A1 (de) 2008-06-18
EP1931868B1 true EP1931868B1 (de) 2013-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06808149.6A Not-in-force EP1931868B1 (de) 2005-09-20 2006-09-18 Verfahren zur schätzung der von jedem zylinder eines verbrennungsmotors erzeugten momentanen geschwindigkeit

Country Status (5)

Country Link
US (1) US8024166B2 (de)
EP (1) EP1931868B1 (de)
JP (1) JP2009509089A (de)
FR (1) FR2891012B1 (de)
WO (1) WO2007034057A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2938093A1 (fr) * 2008-11-04 2010-05-07 Peugeot Citroen Automobiles Sa Methode de determination automatique d'un domaine d'experiences
FR2992359A1 (fr) * 2012-06-25 2013-12-27 Renault Sa Detection de defaillances de combustion d'un moteur
SE537656C2 (sv) * 2013-06-10 2015-09-22 Scania Cv Ab Förfarande för estimering av ett moment genererat av en förbränningsmotor
JP6544479B2 (ja) 2016-03-18 2019-07-17 富士通株式会社 エンジントルク推定装置、エンジン制御システム及びエンジントルク推定方法
JP6930268B2 (ja) * 2017-07-27 2021-09-01 富士通株式会社 算出装置、算出方法、及びエンジン制御システム
JP7431512B2 (ja) * 2019-05-23 2024-02-15 日立Astemo株式会社 内燃機関制御装置
CN113818963B (zh) * 2021-09-23 2022-10-14 宁波吉利罗佑发动机零部件有限公司 发动机扭矩的预测方法、装置及计算机存储介质

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JP3404910B2 (ja) * 1994-09-14 2003-05-12 日産自動車株式会社 無段変速機の変速ショック軽減装置
DE19532136A1 (de) * 1995-08-31 1997-03-06 Clouth Gummiwerke Ag Antriebssystem, insbesondere für ein Kraftfahrzeug, und Verfahren zum Betreiben desselben
US5771482A (en) * 1995-12-15 1998-06-23 The Ohio State University Estimation of instantaneous indicated torque in multicylinder engines
JPH09195826A (ja) * 1996-01-12 1997-07-29 Yamaha Motor Co Ltd 多気筒エンジンの空燃比制御方法
FR2752018B1 (fr) * 1996-08-02 1998-09-04 Renault Procede de detection des rates de combustion d'un moteur a combustion interne
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IT1299857B1 (it) * 1998-02-20 2000-04-04 Magneti Marelli Spa Metodo per la determinazione dell'andamento della pressione interna ad un cilindro di un motore endotermico.
IT1305390B1 (it) * 1998-09-10 2001-05-04 Magneti Marelli Spa Metodo per la determinazione dell'andamento della coppia dicarico in un motore endotermico
DE10017107A1 (de) * 2000-04-06 2001-10-18 Bosch Gmbh Robert Verfahren zur Kompensation der Drehunförmigkeit bei der Drehzahlerfassung
US6363318B1 (en) * 2000-06-21 2002-03-26 Cummins Engine Company, Inc. Method to compensate errors in engine speed measurement
WO2002071308A1 (en) * 2001-03-05 2002-09-12 The Ohio State University Engine control using torque estimation
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Also Published As

Publication number Publication date
FR2891012A1 (fr) 2007-03-23
US20080319725A1 (en) 2008-12-25
JP2009509089A (ja) 2009-03-05
FR2891012B1 (fr) 2011-02-11
EP1931868A1 (de) 2008-06-18
US8024166B2 (en) 2011-09-20
WO2007034057A1 (fr) 2007-03-29

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