EP1234964A1 - Verfahren und Vorrichtung zur Steuerung des Gasflusses an einem Drosselelement - Google Patents

Verfahren und Vorrichtung zur Steuerung des Gasflusses an einem Drosselelement Download PDF

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Publication number
EP1234964A1
EP1234964A1 EP01400449A EP01400449A EP1234964A1 EP 1234964 A1 EP1234964 A1 EP 1234964A1 EP 01400449 A EP01400449 A EP 01400449A EP 01400449 A EP01400449 A EP 01400449A EP 1234964 A1 EP1234964 A1 EP 1234964A1
Authority
EP
European Patent Office
Prior art keywords
flow
transfer function
pumped
throttle
throttle valve
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Withdrawn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
EP01400449A
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English (en)
French (fr)
Inventor
Jean-Denis Piques
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.)
Johnson Controls Automotive Electronics SAS
Original Assignee
Johnson Controls Automotive Electronics SAS
Sagem 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 Johnson Controls Automotive Electronics SAS, Sagem SA filed Critical Johnson Controls Automotive Electronics SAS
Priority to EP01400449A priority Critical patent/EP1234964A1/de
Publication of EP1234964A1 publication Critical patent/EP1234964A1/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Withdrawn legal-status Critical Current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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/105—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine 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
    • F02D41/0002—Controlling intake air
    • F02D2041/0017—Controlling intake air by simultaneous control of throttle and exhaust gas recirculation
    • 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

Definitions

  • the present invention relates to methods and devices for controlling a gas flow (generally air) passing through a throttle device the position is adjusted by an actuator, from a flow rate setpoint pumped from cyclically by a receiver, a collecting volume being interposed between the throttling organ and the receiving organ.
  • a gas flow generally air
  • the invention finds a particularly important application in internal combustion engine control systems having at least one combustion chamber of variable volume during a cycle, supplied with air at constant or variable pressure through a throttle whose position is controlled by an actuator, then through a manifold intake.
  • the throttling organ is generally constituted by a butterfly rotary and the latter term will be used later. However, it should be attributed a general meaning and as applying to any throttling organ having a adjustable position.
  • the present invention aims in particular to provide a method and a device air flow control better than those previously known to requirements of the practice, in particular in that they significantly reduce the pilot time constant.
  • the invention notably proposes a method for controlling the air flow through a butterfly controlled by an actuator from a mass flow set point cyclically pumped through the throttle valve and a Downstream intake manifold according to claim 1.
  • This process is based on the fact that one can, without undue error, model the transfer function of a collector of the kind used in internal combustion engines as a first order function having as an inlet the mass flow of air passing through the butterfly and as an outlet the mass flow of pumped air, with a time constant which is a function itself pumped mass flow and cycle frequency (i.e. engine speed).
  • the time constant ⁇ can be determined by a calibration prior and stored in a table with several entries.
  • the position given to the butterfly (opening angle in general) can be deduced at any time from Q butterfly by reading in a table taking into account temperature and pressure, supplied by sensors.
  • the invention also proposes a control device implementing the above method according to claim 6, as well as a system for internal combustion engine control in which the flow rate setpoint pumped is determined by a calculation unit from a torque setpoint supplied by a body controlled by the driver and possibly by additional torque calls due to the start-up of auxiliaries such as a air conditioning unit or a robotic gearbox in the case of a vehicle.
  • auxiliaries such as a air conditioning unit or a robotic gearbox in the case of a vehicle.
  • the invention proposes a device for controlling a throttle body controlled by an actuator and regulating a flow rate and a air pressure cyclically drawn through a function buffer volume known transfer device according to claim 5.
  • FIG. 1 indicates the transfer function of a buffer volume 23 placed downstream of a throttle member 8.
  • this transfer function if it is linear, can be written in Laplace notation: 1 / (1 + ⁇ p)
  • This transfer function causes, in the event of rapid opening of the throttle resulting in a flow step at the throttle level, by a progressive increase in the pumped flow (FIG. 2). On the contrary, it is possible to obtain a flow step pumped very quickly, as indicated in dashes in FIG. 3, by an excessive increase in the butterfly flow (curve in solid lines).
  • the butterfly must be ordered by implementing a transfer function compensating for that of the buffer volume, of the form: 1 + ⁇ .p K / (1 + ⁇ f.p)
  • the diagram in FIG. 4 shows the operations and the loops of regulation involved in controlling the opening angle of the throttle valve 8 of an internal combustion engine 9, in response to a request from torque produced by the driver's action on an accelerator pedal and by variations in the torque required by auxiliaries using power to the engine.
  • Most of the blocks shown in Figure 1 can be constituted by wired circuits or by programs which in this case can be executed either by a specific microprocessor or by the engine control computer provided on current vehicles.
  • the calculations are performed in digital form, which involves sampling and store the input data. On current engines, a period 0.01 s sampling rate was found to be satisfactory.
  • Block 10 of Figure 4 represents the calculation of a digital signal indicating the average torque indicated CMI, which must be supplied by engine 9 and corresponds to an average air flow determined in steady state.
  • the data of input of block 10 are the position of the pedal, supplied on an input 12 and representative of the setpoint torque that the driver wishes to apply to wheels, the engine speed N applied to an input 13 and giving the frequency debit calls by the rooms, and finally an entry indicating the call of torque possibly required by auxiliaries.
  • the sensors are analog, digital to analog converters not shown are provided.
  • the output signal from block 10, representative of the average torque indicated CMI is translated by a block 14 into a flow rate setpoint Qpomtig, which will called Qpc.
  • a regulation loop includes a subtractor 16 which receives the setpoint signal Qpc on an input and a signal indicating the pumped flow estimated real Qpr on the other entry.
  • the error ⁇ is applied, as well as Qpc, to a filter 18, generally of the PID type.
  • the output of this filter constitutes a signal flow objective pumped Qpo. But assimilate Qpo to a flow instruction butterfly neglects the transfer function due to the dynamic behavior of air in the collector.
  • Block 19 estimates the actual pumped flow mainly from temperature data T, pressure P and speed N of rotation of the engine.
  • the signal representative of Qpo is not used directly to calculate a value of setpoint ⁇ c of the throttle opening angle in a circuit 20 taking into counts the characteristic curve of the butterfly and the temperature T and the pressure F gas upstream of the throttle valve.
  • the signal Qpo is processed by a block 22 which applies a function inverse to the estimated transfer function of the collector 23 (figure 2), as will be seen below so as to provide an outlet a Qpapo signal representative of a throttle flow objective.
  • the butterfly 8 is controlled, in a conventional manner, by a loop of regulation comprising a subtractor 24 which receives on an input the opening of setpoint ⁇ c and on the other input a signal representative of the actual opening current ⁇ r and blocks 26 for controlling the actuator 28 of the throttle valve and 27 for supply of a signal ⁇ r representative of the opening angle.
  • the correction introduced consists in applying, to the signal representative of Qpomdozens, a reverse transfer function.
  • This operation amounts to a high pass filtering of type 1 + ⁇ .tp / K, where ⁇ and K are coefficients which depend on fixed characteristics of the engine (volume of the manifold, number of combustion chambers, ...) and of the motor speed.
  • This filtering also results in amplification of noise.
  • it is desirable to add filtering low pass having a time constant ⁇ f much shorter than the time constant of the collector (at least an order of magnitude).
  • the process can be modified to take into account an exhaust gas recirculation.
  • the flow admitted to the combustion chambers that is to say the pumped flow, depends on both the butterfly flow and the recirculation flow.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP01400449A 2001-02-20 2001-02-20 Verfahren und Vorrichtung zur Steuerung des Gasflusses an einem Drosselelement Withdrawn EP1234964A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01400449A EP1234964A1 (de) 2001-02-20 2001-02-20 Verfahren und Vorrichtung zur Steuerung des Gasflusses an einem Drosselelement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01400449A EP1234964A1 (de) 2001-02-20 2001-02-20 Verfahren und Vorrichtung zur Steuerung des Gasflusses an einem Drosselelement

Publications (1)

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EP1234964A1 true EP1234964A1 (de) 2002-08-28

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EP01400449A Withdrawn EP1234964A1 (de) 2001-02-20 2001-02-20 Verfahren und Vorrichtung zur Steuerung des Gasflusses an einem Drosselelement

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EP (1) EP1234964A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1408385A1 (de) * 2002-10-11 2004-04-14 STMicroelectronics S.A. Verfahren zur Steuerung eines dynamischen Systems mit Hilfe eines Fuzzy-Logic-Modells wenigstens einer inversen Übertragungsfunktion des Systems
FR2910549A1 (fr) * 2006-12-21 2008-06-27 Renault Sas Procede de correction des derives des injecteurs d'un moteur
FR2910550A1 (fr) * 2006-12-21 2008-06-27 Renault Sas Procede de correction des derives d'un injecteur du moteur.
EP2351924B1 (de) * 2008-10-31 2016-12-28 Toyota Jidosha Kabushiki Kaisha Steuerungsvorrichtung für einen verbrennungsmotor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4215107C1 (de) * 1992-05-07 1994-01-20 Daimler Benz Ag Verfahren zur Steuerung einer Brennkraftmaschine
DE19515855A1 (de) * 1995-04-29 1996-10-31 Volkswagen Ag Verfahren zum Einstellen der Bewegung eines leistungsverändernden Regelorgans
DE19618385A1 (de) * 1996-05-08 1997-11-13 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
EP0899439A2 (de) * 1997-08-28 1999-03-03 Nissan Motor Company, Limited Steuervorrichtung und Steuerverfahren für Verbrennungsmotoren
US5925089A (en) * 1996-07-10 1999-07-20 Yamaha Hatsudoki Kabushiki Kaisha Model-based control method and apparatus using inverse model
EP0987417A2 (de) * 1998-09-18 2000-03-22 Hitachi, Ltd. Verfahren und Vorrichtung zur Steuerung der Ansaugluftmenge einer Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4215107C1 (de) * 1992-05-07 1994-01-20 Daimler Benz Ag Verfahren zur Steuerung einer Brennkraftmaschine
DE19515855A1 (de) * 1995-04-29 1996-10-31 Volkswagen Ag Verfahren zum Einstellen der Bewegung eines leistungsverändernden Regelorgans
DE19618385A1 (de) * 1996-05-08 1997-11-13 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
US5925089A (en) * 1996-07-10 1999-07-20 Yamaha Hatsudoki Kabushiki Kaisha Model-based control method and apparatus using inverse model
EP0899439A2 (de) * 1997-08-28 1999-03-03 Nissan Motor Company, Limited Steuervorrichtung und Steuerverfahren für Verbrennungsmotoren
EP0987417A2 (de) * 1998-09-18 2000-03-22 Hitachi, Ltd. Verfahren und Vorrichtung zur Steuerung der Ansaugluftmenge einer Brennkraftmaschine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1408385A1 (de) * 2002-10-11 2004-04-14 STMicroelectronics S.A. Verfahren zur Steuerung eines dynamischen Systems mit Hilfe eines Fuzzy-Logic-Modells wenigstens einer inversen Übertragungsfunktion des Systems
FR2845780A1 (fr) * 2002-10-11 2004-04-16 St Microelectronics Sa Procede de commande d'un systeme dynamique, utilisant un modele de logique floue d'au moins une fonction de transfert inverse de ce systeme
US7013187B2 (en) 2002-10-11 2006-03-14 Stmicroelectronics, S.A. Control procedure using a fuzzy logic model of at least one inverse transfer function of a dynamic system
FR2910549A1 (fr) * 2006-12-21 2008-06-27 Renault Sas Procede de correction des derives des injecteurs d'un moteur
FR2910550A1 (fr) * 2006-12-21 2008-06-27 Renault Sas Procede de correction des derives d'un injecteur du moteur.
EP2351924B1 (de) * 2008-10-31 2016-12-28 Toyota Jidosha Kabushiki Kaisha Steuerungsvorrichtung für einen verbrennungsmotor

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