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EP1292764A1 - Procede pour actionner un moteur a combustion interne - Google Patents

Procede pour actionner un moteur a combustion interne

Info

Publication number
EP1292764A1
EP1292764A1 EP01944928A EP01944928A EP1292764A1 EP 1292764 A1 EP1292764 A1 EP 1292764A1 EP 01944928 A EP01944928 A EP 01944928A EP 01944928 A EP01944928 A EP 01944928A EP 1292764 A1 EP1292764 A1 EP 1292764A1
Authority
EP
European Patent Office
Prior art keywords
fuel
tank ventilation
ventilation valve
air
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.)
Granted
Application number
EP01944928A
Other languages
German (de)
English (en)
Other versions
EP1292764B1 (fr
Inventor
Gholamabas Esteghlal
Georg Mallebrein
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1292764A1 publication Critical patent/EP1292764A1/fr
Application granted granted Critical
Publication of EP1292764B1 publication Critical patent/EP1292764B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
    • F02D41/3023—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the stratified charge spark-ignited mode
    • F02D41/3029—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the stratified charge spark-ignited mode further comprising a homogeneous charge spark-ignited mode
    • 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
    • F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
    • F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
    • 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
    • F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
    • F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
    • F02D41/004—Control of the valve or purge actuator, e.g. duty cycle, closed loop control of position
    • 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
    • F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
    • 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
    • F02D2041/1413—Controller structures or design
    • F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter

Definitions

  • the invention relates to a method for operating an internal combustion engine, in particular a motor vehicle, in which fuel is injected into a combustion chamber in at least two operating modes, and in which an air / fuel mixture flows via a tank ventilation valve and is supplied to the combustion chamber.
  • the invention also relates to a corresponding internal combustion engine and a control device for such an internal combustion engine.
  • Such a method such an internal combustion engine and such a control device are known, for example, from a so-called gasoline direct injection.
  • fuel is injected into the combustion chamber of the internal combustion engine in homogeneous operation during the intake phase or in stratified operation during the compression phase.
  • Homogeneous operation is preferably provided for full-load operation of the internal combustion engine, while stratified operation is suitable for idle and part-load operation.
  • Shift operation is characterized, among other things, by Motgr operation with excess air, that is, by a lean operation.
  • Motgr operation with excess air that is, by a lean operation.
  • the modes of operation of the internal combustion engine are also understood to be homogeneous operation with lambda equal to one, a lean homogeneous operation or homogeneous lean operation and, if appropriate, other modes of operation of the internal combustion engine.
  • the aforementioned tank ventilation must be integrated into the overall control and / or regulation of the internal combustion engine.
  • the object of the invention is to provide a method for operating an internal combustion engine with which an optimal tank ventilation can be achieved.
  • this object is achieved according to the invention in that a specific target fuel rate of the air / fuel mixture flowing via the tank ventilation valve is determined.
  • a specific target fuel rate of the air / fuel mixture flowing via the tank ventilation valve is determined.
  • the tank ventilation can therefore not only be used with a lambda of 1, but with any air / fuel ratio of the internal combustion engine. This means that the tank ventilation can also be used in a direct-injection internal combustion engine in which lambda can also be unequal to 1.
  • the tank ventilation in particular the activation of the tank ventilation valve, is then carried out on the basis of this specific target fuel rate.
  • the specific target fuel rate is regulated to a target fuel portion of the air / fuel mixture flowing via the tank ventilation valve.
  • the specified target fuel fraction can in particular be taken from a map which is dependent on the operating variables of the internal combustion engine.
  • the specific target fuel rate can be weighted with a factor that represents the loading of an activated carbon filter that is contained in the fuel tank of the internal combustion engine.
  • the specific target fuel rate is generated by an integrator, if the specific target fuel rate is compared with the target fuel component, and if the comparison result is fed back to the integrator. Ultimately, the result of the comparison is corrected by the integrator.
  • a desired mass flow is generated and damped via the tank ventilation valve. This in turn ensures that the target mass flow cannot change abruptly, at least in the positive direction. This reliably avoids positive jumps in the control and / or regulation of the entire internal combustion engine.
  • the target flow factor is converted into a maximum mass flow via the tank ventilation valve, if the target mass flow is generated by a positive feedback integrator, and if the target mass flow is limited by the maximum mass flow. On the one hand, this ensures that the target mass flow can only be controlled with a delay. On the other hand, however, it is possible that the target mass flow can be abruptly reduced and thus controlled.
  • the computer program can run on a computer of the control unit and is suitable for executing the method according to the invention.
  • the invention is thus implemented by the computer program, so that this computer program represents the invention in the same way as the method for the execution of which the computer program is suitable.
  • the computer program can be stored on a flash memory.
  • a microprocessor can be provided as a computer.
  • Figure 1 shows a schematic block diagram of an embodiment of an internal combustion engine according to the invention.
  • FIG. 2 shows a schematic block diagram of an exemplary embodiment of a method according to the invention for operating the internal combustion engine of FIG. 1.
  • FIG. 1 shows an internal combustion engine 1 of a motor vehicle in which a piston 2 can be moved back and forth in a cylinder 3.
  • the cylinder 3 is provided with a combustion chamber 4, which is delimited inter alia by the piston 2, an inlet valve 5 and an outlet valve 6.
  • An intake pipe 7 is coupled to the inlet valve 5 and an exhaust pipe 8 is coupled to the exhaust valve 6.
  • an injection valve 9 and a spark plug 10 protrude into the combustion chamber 4.
  • Fuel can be injected into the combustion chamber 4 via the injection valve 9.
  • the fuel in the combustion chamber 4 can be ignited with the spark plug 10.
  • a rotatable throttle valve 11 is accommodated, via which air can be fed to the intake pipe 7.
  • the amount of air supplied depends on the Angular position of the throttle valve 11.
  • a catalytic converter 12 is accommodated in the exhaust pipe 8 and serves to clean the exhaust gases resulting from the combustion of the fuel.
  • a tank ventilation line 16 leads from an activated carbon filter 14 of a fuel tank 15 to the intake pipe 7. A is in the tank ventilation line 16
  • Tank vent valve 17 housed with which the amount of the air / fuel mixture supplied to the intake pipe 7 is adjustable.
  • the activated carbon filter 14, the tank ventilation line 16 and the tank ventilation valve 17 form a so-called tank ventilation.
  • the combustion of the fuel in the combustion chamber 4 causes the piston 2 to move back and forth, which is transmitted to a crankshaft (not shown) and exerts a torque thereon.
  • a control device 18 is acted upon by input signals 19, which represent operating variables of internal combustion engine 1 measured by sensors.
  • the control unit 18 is connected to an air mass sensor, a lambda sensor, a speed sensor and the like.
  • the control unit 18 is connected to an accelerator pedal sensor, which generates a signal that indicates the position of an accelerator pedal that can be actuated by a driver and thus the requested torque.
  • the control unit 18 generates output signals 20 with which the behavior of the internal combustion engine 1 can be influenced via actuators or actuators.
  • the control unit 18 is connected to the injection valve 9, the spark plug 10 and the throttle valve 11 and the like and generates the signals required to control them.
  • control unit 18 is provided for the To control and / or regulate operating variables of the internal combustion engine 1.
  • the fuel mass injected into the combustion chamber 4 by the injection valve 9 is controlled and / or regulated by the control unit 18, in particular with regard to low fuel consumption and / or low pollutant development.
  • the control unit 18 is provided with a microprocessor, which has stored a program in a storage medium, in particular in a flash memory, which is suitable for carrying out the control and / or regulation mentioned.
  • the internal combustion engine 1 of FIG. 1 can be operated in a plurality of operating modes. It is thus possible to operate the internal combustion engine 1 in a homogeneous operation, a stratified operation, a homogeneous lean operation, a stratified operation with a homogeneous basic charge and the like.
  • the fuel is injected from the injection valve 9 directly into the combustion chamber 4 of the internal combustion engine 1 during the intake phase. As a result, the fuel is largely swirled until it is ignited, so that an essentially homogeneous fuel / air mixture is produced in the combustion chamber 4.
  • the torque to be generated is essentially set by the control unit 18 via the position of the throttle valve 11.
  • the operating variables of internal combustion engine 1 are controlled and / or regulated in such a way that lambda is equal to one. Homogeneous operation is used particularly at full load.
  • the homogeneous lean operation largely corresponds to the homogeneous operation, but the lambda is set to a value greater than one.
  • the fuel is injected from the injection valve 9 directly into the combustion chamber 4 of the internal combustion engine 1 during the compression phase.
  • the throttle valve 11 can, apart from requirements, for example, the tank ventilation, be fully opened and the internal combustion engine 1 can thus be operated without dethrottling.
  • the torque to be generated is largely set via the fuel mass in shift operation. With stratified operation, the internal combustion engine 1 can be operated, in particular, when idling and at partial load.
  • the tank ventilation described above must be included in the overall control and / or regulation of the internal combustion engine 1.
  • a number of parameters of the tank ventilation have to be taken into account, such as the loading of the activated carbon filter 14 with hydrocarbons, the position of the tank ventilation
  • Tank ventilation valve 17 the current operating state of the internal combustion engine 1, in particular the current operating mode thereof, the torque requested by the driver and to be output by the internal combustion engine 1, and the like.
  • a target flow factor ftevflos about Tankentluftungsventil 17 and a desired mass flow ⁇ rnsesoll is required, a target flow factor ftevflos about Tankentluftungsventil 17 and a desired mass flow ⁇ rnsesoll to determine via the tank vent valve 17.
  • an integrator 20 is provided in FIG. 2, the output signal of which represents a specific target fuel rate fkastes of the tank ventilation.
  • This specific target fuel rate fkastes is multiplicatively linked to the load ftead of the activated carbon filter 14. The result of this multiplication is compared with a target fuel fraction fkates of the tank ventilation.
  • This target fuel fraction fkates is determined by a block 22 and represents the desired fuel fraction that is to be supplied by the tank ventilation.
  • the result of the abovementioned comparison can possibly also be linked to a factor which is supplied by a block 23 for correction or adaptation purposes.
  • the resulting signal is then fed to the integrator 21 as an input signal.
  • the above-mentioned comparison result is thus present in weighted form on the integrator 21.
  • a maximum value fkastex for the specific fuel rate of the tank ventilation is generated by a block 24 and passed on to the integrator 21.
  • the maximum signal fkastex limits the output signal of the integrator 21, that is to say the specific target fuel rate fkastes of the tank ventilation.
  • the integrator 21 with the associated feedback loop represents a control loop with which the specific target r ⁇ -
  • Tank vent valve 17 is present.
  • the result of this multiplication represents a maximum mass flow mstemx via the tank ventilation valve 17.
  • This maximum mass flow mstemx is fed to a further integrator 28 as a maximum value.
  • the integrator 28 generates the desired mass flow rnsesoll via the tank ventilation valve 17 as an output signal. This desired mass flow rnsesoll is fed back to the input of the integrator 28. It is possible for the desired mass flow to be linked multiplicatively with a factor, this factor being generated by a block 29. It is also possible for further operating variables of the internal combustion engine 1 to be taken into account in the feedback loop by means of a block 30.
  • the output signal of the integrator 28, that is to say the target mass flow rate target, is limited to the maximum value mstemx of the mass flow rate via the tank ventilation valve 17.
  • the two integrators 25 and 28 are positively fed back via their respective feedback loops. This means that both integrators 25, 28 always have a tendency to increase their output signal.
  • the slope of such an increase in the respective output signal depends on the feedback loop, and there in particular on influencing the feedback signal. Said slope can thus be set to desired values via blocks 26, 27 and blocks 29, 30.
  • both integrators 25, 28 are each limited by a maximum value. This means that
  • the output signal of the integrator 28 is the target mass flow rnsesoll via the tank ventilation valve 17.
  • This target mass flow rnsesoll cannot change abruptly. Instead, the target mass flow can only be controlled with the speed limit already mentioned. Conversely, however, it is possible to rapidly and suddenly set the desired mass flow rate. There is no speed limit here.
  • the first integrator 21 controls the specific target fuel rate fkastes.
  • a damped setpoint flow factor ftevflos is derived from the specific setpoint fuel rate fkastes with the aid of the second integrator 25.
  • an attenuated target mass flow rate target target is determined from the target flow factor ftevflos.
  • This entire method can be used for any lambda. The air-fuel ratio is taken into account via the target lambda lamsbg in the described method.

Landscapes

  • 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)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un moteur à combustion interne (1) notamment pour automobile. Selon l'invention, du carburant peut être injecté, dans au moins deux modes de fonctionnement, dans une chambre de combustion (4) et un mélange air-carburant peut s'écouler par l'intermédiaire d'une soupape de dégazage du réservoir (17) et être acheminé jusqu'à la chambre de combustion (4). Un appareil de commande (18) permet de déterminer un débit théorique spécifique de carburant du mélange air-carburant s'écoulant par l'intermédiaire de la soupape de dégazage du réservoir (17).
EP01944928A 2000-06-08 2001-05-15 Procede pour actionner un moteur a combustion interne Expired - Lifetime EP1292764B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10028539 2000-06-08
DE10028539A DE10028539A1 (de) 2000-06-08 2000-06-08 Verfahren zum Betreiben einer Brennkraftmaschine
PCT/DE2001/001837 WO2001094771A1 (fr) 2000-06-08 2001-05-15 Procede pour actionner un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1292764A1 true EP1292764A1 (fr) 2003-03-19
EP1292764B1 EP1292764B1 (fr) 2006-03-22

Family

ID=7645209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01944928A Expired - Lifetime EP1292764B1 (fr) 2000-06-08 2001-05-15 Procede pour actionner un moteur a combustion interne

Country Status (9)

Country Link
US (1) US6814062B2 (fr)
EP (1) EP1292764B1 (fr)
JP (1) JP2003536016A (fr)
KR (1) KR20030036213A (fr)
CN (1) CN1270073C (fr)
DE (2) DE10028539A1 (fr)
MX (1) MXPA02012059A (fr)
RU (1) RU2002135068A (fr)
WO (1) WO2001094771A1 (fr)

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EP3051367B1 (fr) 2015-01-28 2020-11-25 Honeywell spol s.r.o. Approche et système de manipulation de contraintes pour des perturbations mesurées avec une prévisualisation incertaine
EP3056706A1 (fr) 2015-02-16 2016-08-17 Honeywell International Inc. Approche de modélisation de système de post-traitement et d'identification de modèle
EP3091212A1 (fr) 2015-05-06 2016-11-09 Honeywell International Inc. Approche d'identification pour modèles de valeurs moyennes de moteurs à combustion interne
EP3125052B1 (fr) 2015-07-31 2020-09-02 Garrett Transportation I Inc. Résolveur de programme quadratique pour mpc utilisant une commande variable
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Also Published As

Publication number Publication date
CN1270073C (zh) 2006-08-16
RU2002135068A (ru) 2004-08-20
DE50109298D1 (de) 2006-05-11
CN1436281A (zh) 2003-08-13
WO2001094771A1 (fr) 2001-12-13
KR20030036213A (ko) 2003-05-09
EP1292764B1 (fr) 2006-03-22
US20030145837A1 (en) 2003-08-07
JP2003536016A (ja) 2003-12-02
DE10028539A1 (de) 2001-12-20
MXPA02012059A (es) 2004-03-16
US6814062B2 (en) 2004-11-09

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