EP0445339A1 - Système pour le contrôle du ralenti dans un moteur à combustion - Google Patents

Système pour le contrôle du ralenti dans un moteur à combustion Download PDF

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Publication number
EP0445339A1
EP0445339A1 EP90104535A EP90104535A EP0445339A1 EP 0445339 A1 EP0445339 A1 EP 0445339A1 EP 90104535 A EP90104535 A EP 90104535A EP 90104535 A EP90104535 A EP 90104535A EP 0445339 A1 EP0445339 A1 EP 0445339A1
Authority
EP
European Patent Office
Prior art keywords
observer unit
control system
reconstructed
variable
idle control
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Withdrawn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
EP90104535A
Other languages
German (de)
English (en)
Inventor
Franz Prof. Dr.-Ing Assbeck
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP90104535A priority Critical patent/EP0445339A1/fr
Publication of EP0445339A1 publication Critical patent/EP0445339A1/fr
Withdrawn legal-status Critical Current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
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • 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
    • 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
    • F02D2041/1415—Controller structures or design using a state feedback or a state space representation
    • 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
    • F02D2041/1415—Controller structures or design using a state feedback or a state space representation
    • F02D2041/1416—Observer
    • 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

Definitions

  • the present invention relates to an idle control system for an internal combustion engine, with a loss and disturbance variable feedback from an observer unit.
  • Kiencke U., VDI-Ber. 612 (1986) Design of a state controller for idle control of a gasoline engine "is a state control loop with feedback of the intake manifold pressure.
  • This known state control loop is robust against leaps in command variables (accelerator pedal), but can only change changes in loss and disturbance variables (mechanical losses during warm-up, auxiliary drives to be switched on) to a limited extent, namely via the conventional speed Setpoint / actual value comparison and compensate by additional heuristic interventions.
  • the present invention has for its object to provide an idle control system of the type mentioned, which is capable of the idle speed with a state controller that detects both the operating point-dependent mechanical losses and the mechanical system engine disturbing elements with an observer unit and compensating the mixture feed switches to regulate.
  • an idle control system in which the total mechanical losses of the internal combustion engine, including the energy requirements of all auxiliary units currently switched on, are reconstructed in the observer unit with a predetermined time constant, for which purpose the observer unit uses the angular velocity of the internal combustion engine and the gas work released in its combustion chamber as input variables are supplied and the idle torque reconstructed by the observer unit of the quantity corresponding to the mixture supplied is added to compensate as a reference variable component in order to achieve an ideal disturbance variable behavior.
  • the invention offers the advantage that the running limit (this is the minimum speed from which "stalling” can no longer occur when idling) can be further reduced and the smoothness can be improved. Since consumption and emissions decrease approximately proportionally with the speed, this can be used especially in city traffic, see e.g. Bosch technical briefing "Motronic" Sept. 1985, p. 26, and in the warm-up phase, improvements can be achieved.
  • the required amount of mixture can be determined well in advance, and the operation of the control loop is no longer initiated solely by the speed setpoint / actual value comparison alone.
  • control adapts e.g. the engine friction falling during warm-up or the varying energy requirements of the auxiliary drives.
  • the feedback of the state from the "loss observer", namely the observer unit, can also compensate for arbitrary disturbance variable feeds (such as switching on the air conditioning system, servomotors and the like) without overwhelming the speed controller, taking into account a settling time of the observer unit.
  • the invention eliminates all the disadvantages associated with a (previously explained) "pilot control of the required idling torque" by the observer reconstructing this quantity from the comparison of the gas work (M I ) released in the combustion chamber with the dynamics of the engine speed (dn / dt) and the introduction of the mixture pretends as a command component.
  • the dynamic behavior of the overall system can be predetermined by appropriately acting on the control variable “mixture introduction” with feedbacks formed from the state variables “intake manifold pressure” and “idling torque”.
  • FIG. 2 shows, as previously indicated, the functional diagram of a so-called observer model for the reconstruction of the "mechanical losses in idle mode" according to the prior art, to which an observer unit B according to the invention is fed.
  • the inertial mass J is adapted by means of switch messages or from the control signals of the connected auxiliary units and in the analog circuit (FIG. 3) switches corresponding capacitors to C in parallel.
  • the input variables and the variable corresponding to the internal signal variable v are sampled with a switch S1 and buffered.
  • a hold and delay element (z -1 ) carries out the processing of the observer-internal signal quantity v by delaying it by a sampling interval T.
  • the digital observer unit B stores as many sampling times (n) T, (n + 1) T, ... as it is System order of the observer unit B corresponds.
  • the engine model (1t. Fig. 1) may be extended by this "energy sink".
  • the result is an idle control, which is not only robust against gas shocks by the driver, but also - adaptable to the warm-up behavior, to mechanical changes due to aging, to specimen scatter and - robust to disturbing torques, introduced by switching auxiliary drives.

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)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP90104535A 1990-03-09 1990-03-09 Système pour le contrôle du ralenti dans un moteur à combustion Withdrawn EP0445339A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90104535A EP0445339A1 (fr) 1990-03-09 1990-03-09 Système pour le contrôle du ralenti dans un moteur à combustion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90104535A EP0445339A1 (fr) 1990-03-09 1990-03-09 Système pour le contrôle du ralenti dans un moteur à combustion

Publications (1)

Publication Number Publication Date
EP0445339A1 true EP0445339A1 (fr) 1991-09-11

Family

ID=8203737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104535A Withdrawn EP0445339A1 (fr) 1990-03-09 1990-03-09 Système pour le contrôle du ralenti dans un moteur à combustion

Country Status (1)

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EP (1) EP0445339A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672086A1 (fr) * 1991-01-29 1992-07-31 Siements Automotive Sa Procede et dispositif de commande en boucle fermee de la puissance d'un moteur a combustion interne propulsant un vehicule automobile.
US7321822B2 (en) * 2002-11-29 2008-01-22 Audi Ag Device and method for estimation of an engine torque
DE102005056516B4 (de) 2005-11-28 2018-07-26 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326188A2 (fr) * 1983-11-04 1989-08-02 Nissan Motor Co., Ltd. Système électronique de commande de moteur à combustion interne permettant d'empêcher le calage du moteur et méthode à cet effet
EP0338560A2 (fr) * 1988-04-21 1989-10-25 Hitachi, Ltd. Méthode et dispositif pour commander les moteurs à combustion interne
EP0352705A1 (fr) * 1988-07-27 1990-01-31 Siemens Aktiengesellschaft Procédé de régulation de la richesse d'un mélange air-carburant d'alimentation d'un moteur à combustion interne, du type boucle fermée, sans exploitation de mesure physique de richesse

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326188A2 (fr) * 1983-11-04 1989-08-02 Nissan Motor Co., Ltd. Système électronique de commande de moteur à combustion interne permettant d'empêcher le calage du moteur et méthode à cet effet
EP0338560A2 (fr) * 1988-04-21 1989-10-25 Hitachi, Ltd. Méthode et dispositif pour commander les moteurs à combustion interne
EP0352705A1 (fr) * 1988-07-27 1990-01-31 Siemens Aktiengesellschaft Procédé de régulation de la richesse d'un mélange air-carburant d'alimentation d'un moteur à combustion interne, du type boucle fermée, sans exploitation de mesure physique de richesse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 12, Nr. 296 (M-731), 12. August 1988; & JP-A-63 74 733 (TOYOTA MOTOR) 05-04-1988 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672086A1 (fr) * 1991-01-29 1992-07-31 Siements Automotive Sa Procede et dispositif de commande en boucle fermee de la puissance d'un moteur a combustion interne propulsant un vehicule automobile.
WO1992013185A1 (fr) * 1991-01-29 1992-08-06 Siemens Automotive S.A. Procede et dispositif pour commander par retroaction la puissance d'un moteur a combustion interne entrainant un vehicule
US5372110A (en) * 1991-01-29 1994-12-13 Siemens Automotive S.A. Method and device for closed-loop control of the power of an internal combustion engine propelling a motor vehicle
US7321822B2 (en) * 2002-11-29 2008-01-22 Audi Ag Device and method for estimation of an engine torque
DE102005056516B4 (de) 2005-11-28 2018-07-26 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine

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