EP3376007A1 - Verfahren zur abschätzung des drehmoments eines laufenden verbrennungsmotors - Google Patents

Verfahren zur abschätzung des drehmoments eines laufenden verbrennungsmotors Download PDF

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Publication number
EP3376007A1
EP3376007A1 EP18156234.9A EP18156234A EP3376007A1 EP 3376007 A1 EP3376007 A1 EP 3376007A1 EP 18156234 A EP18156234 A EP 18156234A EP 3376007 A1 EP3376007 A1 EP 3376007A1
Authority
EP
European Patent Office
Prior art keywords
engine
torque
setpoint
richness
internal combustion
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Withdrawn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
EP18156234.9A
Other languages
English (en)
French (fr)
Inventor
Romain Boissard
Benoit BARRE
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.)
PSA Automobiles SA
Original Assignee
PSA 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 PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3376007A1 publication Critical patent/EP3376007A1/de
Withdrawn legal-status Critical Current

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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
    • F02D41/14—Introducing closed-loop corrections
    • 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
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • 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
    • 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
    • F02D2200/1006—Engine torque losses, e.g. friction or pumping losses or losses caused by external loads of accessories

Definitions

  • the present invention relates to the field of internal combustion engines.
  • the invention more particularly relates to a method for estimating torque produced by an engine of a motor vehicle.
  • the user of a vehicle may in certain situations request a change in the engine torque, whether it is an acceleration or a deceleration.
  • the amount of air in the engine may be deviated from the set air quantity while the fuel quantity is higher. already in accordance with the instructions.
  • the actual motor torque is then in deviation with the target torque.
  • This situation is related to the fact that the regulation of the quantity of air is slower than that of the fuel flow. But if the air flow is not at the setpoint, the richness in the combustion chamber of the engine is different from that defined by the air and fuel instructions, which induces a different combustion and engine torque achieved different from the deposit.
  • the technical effect is thus to obtain an accurate estimate of the actual engine torque simply and efficiently.
  • the engine torque indicated is a motor torque indicated said high pressure.
  • the correction coefficient is obtained from a map that establishes the correction coefficient based on the actual richness and the setpoint richness.
  • the correction coefficient is obtained from a polynomial function that establishes the correction coefficient from the actual operating richness and the setpoint richness.
  • the invention also relates to a computer comprising the acquisition means, processing software instructions stored in a memory and the control means required to implement a method according to any of the previously described variants.
  • the invention also relates to an internal combustion engine comprising such a computer.
  • the internal combustion engine is a compression ignition engine.
  • the invention also relates to a motor vehicle comprising an internal combustion engine of the invention for its displacement.
  • the invention is particularly applicable to a motor vehicle comprising an internal combustion engine for its displacement.
  • This internal combustion engine may be a compression ignition engine, operating for example with diesel fuel.
  • the internal combustion engine is equipped with a computer for carrying out the method of the invention described below.
  • This calculator comprises the acquisition means, processing software instructions stored in a memory and the control means required to implement the method of the invention.
  • the indicated torque HP (HP for High Pressure), is generated during the compression and then expansion phase of the engine when the valves are closed.
  • the indicated torque BP (BP for Low Pressure), corresponds to the pumping forces necessary to admit and repress the air in the engine.
  • the friction torque corresponds to the forces generated by the various friction: segmentation, crankshaft, drive pumps and accessories ...
  • the engine control In a vehicle, the engine control must be able to estimate the actual engine torque in all circumstances, since this information serves various functions of the vehicle.
  • the actual engine torque can thus be indirectly obtained by estimating the actual indicated torque HP if we know for the operating points the indicated torque BP and the friction torque.
  • the figure 1 presents a first part of the strategy adopted to improve the estimation of the real torque provided by the internal combustion engine in cases of transient life, when the engine transits from one operating point to another due to a demand of couple.
  • this strategy comprises a step in which a setpoint, Cc, of engine torque is determined, preferably an indicated engine torque HP, which translates the requested engine torque.
  • the engine speed N is also determined.
  • Carto1 which establishes the fuel flow as a function of the indicated torque HP and the engine speed
  • Carto2 which establishes the air flow rate as a function of the indicated torque HP and the engine speed
  • a setpoint, Qc air of flow rate is determined. air.
  • the determination of the correction coefficient, Ccor can be done using a cartography, Carto3, which establishes this coefficient as a function of the setpoint richness, ⁇ c and the real richness, ⁇ func.
  • correction coefficient, Ccor can also be done by a polynomial function, only dependent on the setpoint richness, ⁇ c and the real richness, ⁇ func, which is simpler than mapping to be completed.
  • the indicated actual engine torque HP is then equal to the product of the setpoint, Cc, of indicated engine torque HP and the correction coefficient, Ccor.
  • the estimation of the engine torque by taking the wealth information makes it possible to reduce the engine torque error from 25% to 5%.
  • the strategy may be suitable for a spark-ignition engine, even if it is less relevant because the wealth in Diesel engine is wider than gasoline (0.2 up to 1) while in essence we generally try to be wealth1 All the time.

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)
EP18156234.9A 2017-03-14 2018-02-12 Verfahren zur abschätzung des drehmoments eines laufenden verbrennungsmotors Withdrawn EP3376007A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1752053A FR3064027B1 (fr) 2017-03-14 2017-03-14 Procede d’estimation du couple d’un moteur a combustion interne en fonctionnement

Publications (1)

Publication Number Publication Date
EP3376007A1 true EP3376007A1 (de) 2018-09-19

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ID=58779170

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18156234.9A Withdrawn EP3376007A1 (de) 2017-03-14 2018-02-12 Verfahren zur abschätzung des drehmoments eines laufenden verbrennungsmotors

Country Status (2)

Country Link
EP (1) EP3376007A1 (de)
FR (1) FR3064027B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118997942A (zh) * 2024-09-26 2024-11-22 长城汽车股份有限公司 发动机的扭矩控制方法、存储介质和车辆

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2755184A1 (fr) * 1996-10-31 1998-04-30 Renault Systeme de regulation de la richesse d'un moteur thermique a injection avec consigne de richesse adaptative
WO1999018343A1 (de) * 1997-10-07 1999-04-15 Siemens Aktiengesellschaft Verfahren und einrichtung zum überwachen einer brennkraftmaschine
WO2013042477A1 (ja) * 2011-09-22 2013-03-28 日産自動車株式会社 内燃機関のエンジントルク推定装置
DE102014209174A1 (de) * 2014-05-15 2015-11-19 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung eines Luft-Kraftstoff-Gemischs zum Betrieb einer Brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2755184A1 (fr) * 1996-10-31 1998-04-30 Renault Systeme de regulation de la richesse d'un moteur thermique a injection avec consigne de richesse adaptative
WO1999018343A1 (de) * 1997-10-07 1999-04-15 Siemens Aktiengesellschaft Verfahren und einrichtung zum überwachen einer brennkraftmaschine
WO2013042477A1 (ja) * 2011-09-22 2013-03-28 日産自動車株式会社 内燃機関のエンジントルク推定装置
DE102014209174A1 (de) * 2014-05-15 2015-11-19 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung eines Luft-Kraftstoff-Gemischs zum Betrieb einer Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118997942A (zh) * 2024-09-26 2024-11-22 长城汽车股份有限公司 发动机的扭矩控制方法、存储介质和车辆

Also Published As

Publication number Publication date
FR3064027B1 (fr) 2019-03-22
FR3064027A1 (fr) 2018-09-21

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