EP0205916A2 - Procédé de commande et/ou de régulation des caractéristiques de fonctionnement d'un moteur à combustion - Google Patents

Procédé de commande et/ou de régulation des caractéristiques de fonctionnement d'un moteur à combustion Download PDF

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Publication number
EP0205916A2
EP0205916A2 EP86106798A EP86106798A EP0205916A2 EP 0205916 A2 EP0205916 A2 EP 0205916A2 EP 86106798 A EP86106798 A EP 86106798A EP 86106798 A EP86106798 A EP 86106798A EP 0205916 A2 EP0205916 A2 EP 0205916A2
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EP
European Patent Office
Prior art keywords
combustion engine
signal
internal combustion
idle
air supply
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
EP86106798A
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German (de)
English (en)
Other versions
EP0205916A3 (en
EP0205916B1 (fr
Inventor
Helmut Ing. Denz
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
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0205916A2 publication Critical patent/EP0205916A2/fr
Publication of EP0205916A3 publication Critical patent/EP0205916A3/de
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Publication of EP0205916B1 publication Critical patent/EP0205916B1/fr
Expired legal-status Critical Current

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    • 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
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • 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
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • F02D41/126—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off transitional corrections at the end of the cut-off period

Definitions

  • the invention relates to a method for the control and / or regulation of operating parameters of an internal combustion engine with an injection signal formed for the metering of fuel to the internal combustion engine as a function of operating parameters of the internal combustion engine, with an idle filling signal for the idle air supply to the internal combustion engine also generated as a function of operating parameters of the internal combustion engine. , as well as with detection of overrun operation of the internal combustion engine.
  • mixture preparation systems of this type cause a jerk when changing from their normal operating state to the operating state of the overrun fuel cutoff, that is to say when the fuel metering to the internal combustion engine is interrupted, which noticeably worsens the driving behavior of the motor vehicle operated with the internal combustion engine.
  • the object according to the invention with the characterizing features of the main claim has the advantage that the jolt during the transition from normal operation of the internal combustion engine to the operating state of the overrun fuel cutoff can be avoided. This is achieved in that after the start of coasting the idle charge signal is influenced in such a way that the idle air supply is reduced and after reaching a predeterminable value of the idle fill signal the injection signal is changed such that the fuel metering is interrupted.
  • the idle fill signal is set in such a way that the idle air supply assumes a predeterminable average value. It is thereby achieved that a possible transition to idling operation of the internal combustion engine can be reacted to quickly.
  • a further advantageous development of the invention is characterized in that after the end of the overrun operation, the injection signal is changed in such a way that the interruption of the fuel metering is canceled and the idling fill signal is influenced in such a way that the idle air supply from a predeterminable low value to a predeterminable average value increases.
  • FIG. 1 shows a block diagram for the implementation of the method according to the invention
  • FIG. 2 shows signal diagrams for the block diagram of FIG. 1. Both figures are explained in more detail in the description below.
  • a signal relating to the air quantity per time QL and a signal relating to the speed of the internal combustion engine N are fed to a load signal formation 10 (LAST).
  • a correction device 11 (KORR) connected to the load signal formation 10 forms an output signal as a function of its input signal, the load signal tl, specifically the injection signal ti, which is connected to a switching device 12.
  • the output signal of this switching device 12 is denoted by tik and fed to an output stage 13, which then influences an internal combustion engine 20.
  • An idle control 15 (LLR) is acted upon by the speed signal N and the load signal tl and, as a function thereof, generates an idle fill signal tl which is fed to a link 16.
  • This link 16 is fed two further signals negatively, which then together form an output signal, which is identified by lk, and which influences the internal combustion engine 20 via an output stage 17.
  • a fuel cut-off detection 30 is at least applied to the speed signal N, depending on which it forms an output signal S which drives a fuel cut-off integrator 31.
  • This integrator 31 is influenced on the one hand by a fuel cut-off time constant setting 32 (SZK) dependent on the speed N of the internal combustion engine, and on the other hand by a signal W, which will be explained in more detail later.
  • the output signal of the integrator 31 is denoted by SI and acts on a switching device 34 controlled by an OR link 33, as well as a threshold value stage 35.
  • the threshold value of the threshold value stage 35 is determined by the output signal K of a threshold value setting 36 which is dependent on the engine speed of the internal combustion engine N. (SW) specified.
  • a reinsertion detection 40 is triggered by at least one signal with respect to the rotational speed N of the internal combustion engine and generates an output signal W as a function thereof, which is connected to a reinsertion integrator 41.
  • This is influenced by a reinsertion time constant setting h2 (WZK) which is dependent on the speed N.
  • the output signal of the integrator 41 is identified by WI and acts on a switching device 43 which is controlled by an OR link 44.
  • the OR link 44 is connected to the output of the threshold 35, this signal being further connected to an AND link 46.
  • the second input of the AND link 46 is influenced by the output signal W of the block 40 via an inverter 45. This signal is also connected to the integrator 31 and to the OR gate 33.
  • the output signal of the AND link 46 controls the switching device 12 on the one hand and is also connected to the OR link 33 just mentioned.
  • a speed gradient detection 48 generates an output signal as a function of the speed signal N, which is connected to one input of each of the two OR links 33 and 44.
  • the output signals of the two switching devices 34 and 43 ultimately influence the link 16 provided with a negative sign.
  • FIG. 2 shows the course of the signals S, W, SI, WI, lk, and tik.
  • T1, T2, T3 and T4 are specific points in time, while the abbreviations TVS, TSAS and TVW indicate certain periods of time.
  • the time t is plotted on the horizontal axis.
  • the overrun operation of the internal combustion engine is recognized by the overrun fuel cut-off detection 30, so that the signal S jumps from 0 to 1 and the signal SI slowly begins to increase from the value zero.
  • the signal SI is forwarded to the link 16 via the closed switch 34, so that the idle fill signal ⁇ 1 is thereby changed to the signal ⁇ lk. If the signal SI reaches the value K of the threshold value stage 35, this causes a 1 signal at the output of stage 35, which in turn opens all switches 12, 34 and 43. This happens at time T2, which is therefore the actual start of the overrun fuel cutoff.
  • the injection signal ti is now interrupted after the time T2, so that the signal tik is one, which means that no fuel is injected, and the signal ⁇ lk assumes the value of the idle fill signal ⁇ 1 again, since in particular the switch 34 is open.
  • the time period TVS between the times T1 and T2 is a fuel cut-off delay, while the actual fuel cut-off time TSAS then follows the time T2. This last-mentioned time period ends at time T3.
  • the signal S becomes zero again, ie there is no longer an overrun fuel cutoff, while the signal W becomes 1, which has the meaning of a restart after an overrun fuel cutoff.
  • the signal WI is set to a predeterminable output value from which it slowly decreases again to the value zero, and at the same time the fuel cut-off integrator 31 is reset to the value zero.
  • the signal SI falls again below the value K of the threshold value stage 35, with the result that the two switching devices 12 and 43 return to their initial state, namely the closed switching state. Only the switching device 34 remains open because it is controlled via the OR link 33 with the 1 signal of the signal W.
  • the injection signal ti is thus passed on via the switching device 12, so that the signal tik corresponds to the signal ti. Furthermore, the signal WI is supplied to the link 16 via the switching device 43, so that the idle fill signal ⁇ 1 is changed by the signal WI to the signal ⁇ lk.
  • the time period TVW after the time T3 is an increase in the idle fill signal during the restart, which ended at the time T4. At this point in time T4, the signal WI has become zero again, so that the idle signal t1 is now again corresponds to the signal ⁇ lk. After time T4, the entire overrun fuel cutoff with subsequent reinstallation is ended.
  • the overrun cutoff time constant setting 32 and the reinsertion time constant setting 42 have the task of determining the rise time constants and, if appropriate, also the initial values of the signals SI and WI of the following integrators 31 and 41. Of course, it is also possible for other parameters to act on the two integrators 31 and 41 mentioned. The same is true in connection with the threshold value setting 36.
  • This has the task of setting the threshold value K of the threshold value stage 35.
  • the value of the signal K is dependent on the speed N of the internal combustion engine. In this context too, it is possible that further parameters act on the threshold value stage 35 and the threshold value setting 36.
  • the overrun fuel cutoff detection 30 and the reinsertion detection 40 have the task of recognizing and displaying the overrun operation of the internal combustion engine.
  • the detection can be carried out with the aid of the rotational speed N of the internal combustion engine and, if appropriate, further operating parameters of the internal combustion engine. So it is e.g. possible that overrun is present precisely when the throttle valve of the internal combustion engine is in its idle position, but at the same time the speed of the internal combustion engines is at least a certain value above the idle speed.
  • the signals ti or tik and ⁇ 1 or ⁇ lk can be analog as well as digital signals. This is indicated in FIG. 2 in that the signal tik is shown in the form of individual injection pulses, while the signal ⁇ lk is an analog signal. Ultimately, however, this is insignificant for the invention as such, since the output stages 13 and 17 can be used to convert the injection and idle signals into corresponding control signals of the electromechanical actuators as desired.
  • the speed gradient detection 48 has the task of detecting certain predeterminable speed changes in order to then open the switching devices 34 and 43 via the OR links 33 and 44, that is to say to suddenly reset the signal ⁇ lk to the value of the signal ⁇ 1.
  • certain speed drops e.g. are a negative speed gradient that only occurs when the internal combustion engine and the subsequent transmission of the motor vehicle have been decoupled from one another.
  • the engine is first brought to the lowest possible torque by reducing the idle air supply, in order to then interrupt the fuel metering.
  • the actual idle fill signal is not changed, it is ensured at every moment of the overrun fuel cutoff that the internal combustion engine does not die during a possible transition to idle operation. The same happens when you reinsert, in which the idle air supply is slowly increased from a low value to its normal value, without again influencing the actual idle control.
  • optimal idling control is possible at any moment, even with this transition, while at the same time avoiding the jerk normally caused by the transition.
  • a further improvement in driving comfort can consist in the fact that in the event of rapid negative load changes of the internal combustion engine with a subsequent transition to the idle operating state, the overrun fuel cutoff integrator 31 is initially set to a predeterminable negative value, from which the increase in the signal SI, which has hitherto originated from zero, then starts.
  • the jerk resulting from the closing of the throttle valve can be reduced further, since in the first moment after the throttle valve closes more air is supplied to the internal combustion engine than corresponds to the closed throttle valve.

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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)
EP86106798A 1985-06-15 1986-05-20 Procédé de commande et/ou de régulation des caractéristiques de fonctionnement d'un moteur à combustion Expired EP0205916B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853521551 DE3521551A1 (de) 1985-06-15 1985-06-15 Verfahren zur steuerung und/oder regelung von betriebskenngroessen einer brennkraftmaschine
DE3521551 1985-06-15

Publications (3)

Publication Number Publication Date
EP0205916A2 true EP0205916A2 (fr) 1986-12-30
EP0205916A3 EP0205916A3 (en) 1987-10-28
EP0205916B1 EP0205916B1 (fr) 1989-08-23

Family

ID=6273402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106798A Expired EP0205916B1 (fr) 1985-06-15 1986-05-20 Procédé de commande et/ou de régulation des caractéristiques de fonctionnement d'un moteur à combustion

Country Status (5)

Country Link
US (1) US4700673A (fr)
EP (1) EP0205916B1 (fr)
JP (1) JPH07103823B2 (fr)
BR (1) BR8602749A (fr)
DE (2) DE3521551A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3805488A1 (de) * 1987-02-27 1988-09-08 Fuji Heavy Ind Ltd Kraftstoffsteuerungssystem fuer einen kraftfahrzeugmotor
WO1989008776A1 (fr) * 1988-03-16 1989-09-21 Robert Bosch Gmbh Procede permettant d'eviter un moment d'entrainement trop eleve
WO1990002258A1 (fr) * 1988-08-25 1990-03-08 Robert Bosch Gmbh Dispositif de regulation d'un parametre de fonctionnement d'un moteur a combustion interne

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4977876A (en) * 1988-03-08 1990-12-18 Nissan Motor Company, Ltd. Fuel injection control system for internal combustion engine with fuel cut-off control at high engine speed range suppressive of recovery shock upon fuels resumption
US5313922A (en) * 1989-12-23 1994-05-24 Robert Bosch Gmbh Method for controlling a flow of fuel to an engine of a vehicle during overrun operation
DE4332445C2 (de) * 1993-09-23 2002-06-13 Bayerische Motoren Werke Ag Verfahren zur Steuerung des Leerlaufstellers einer Brennkraftmaschine
DE19518813C1 (de) * 1995-05-23 1996-12-19 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung des Drehmoments einer Brennkraftmaschine
DE19549076A1 (de) * 1995-12-29 1997-07-03 Opel Adam Ag Verfahren zur Unterdrückung des beim Übergang von Zug- auf Schubbetrieb auftretenden Ruckelns einer zum Antrieb eines Kraftfahrzeuges dienenden Brennkraftmaschine
JP2775676B2 (ja) * 1996-01-22 1998-07-16 本田技研工業株式会社 内燃機関の燃料供給制御装置
JP2000282923A (ja) * 1999-03-31 2000-10-10 Nissan Diesel Motor Co Ltd 内燃機関の燃料噴射量制御装置
DE19943914A1 (de) 1999-09-14 2001-03-15 Volkswagen Ag Vorrichtung und Verfahren zum Betreiben einer Brennkraftmaschine mit Drosselklappe im Schubbetrieb

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933168A (en) * 1957-08-23 1960-04-19 William E Leibing Deceleration controlled fuel shut-off means
US3297103A (en) * 1964-03-24 1967-01-10 Walker Brooks Engine fuel supply
FR2406080A1 (fr) * 1977-10-11 1979-05-11 Nissan Motor Systeme d'injection de carburant pour un moteur a combustion interne de vehicule automobile, equipe d'un generateur de signal de commande de coupure de carburant
FR2414629A1 (fr) * 1978-01-17 1979-08-10 Bosch Gmbh Robert Procede et dispositif pour commander l'alimentation en carburant d'un moteur a combustion interne
JPS59150933A (ja) * 1983-02-15 1984-08-29 Fujitsu Ten Ltd 電子式燃料噴射装置の噴射制御方法

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
US3690305A (en) * 1968-10-04 1972-09-12 Hitachi Ltd Fuel supply control system for automobile engines
US4322947A (en) * 1977-06-23 1982-04-06 Robert Bosch Gmbh Control apparatus for a fuel supply system for mixture-compressing, externally ignited internal combustion engines
JPS5512264A (en) * 1978-07-14 1980-01-28 Toyota Motor Corp Revolution rate control method for internal-combustion engine
EP0089409B1 (fr) * 1982-03-18 1989-03-29 VDO Adolf Schindling AG Système de coupure d'alimentation en carburant dans un moteur à combustion interne
DE3337786A1 (de) * 1983-10-18 1985-04-25 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur steuerung des schubbetriebs einer brennkraftmaschine
JPS60100539U (ja) * 1983-12-15 1985-07-09 日産自動車株式会社 車両用内燃機関の出力制御装置
DE3345711A1 (de) * 1983-12-17 1985-06-27 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur drehzahlregelung bei einer brennkraftmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933168A (en) * 1957-08-23 1960-04-19 William E Leibing Deceleration controlled fuel shut-off means
US3297103A (en) * 1964-03-24 1967-01-10 Walker Brooks Engine fuel supply
FR2406080A1 (fr) * 1977-10-11 1979-05-11 Nissan Motor Systeme d'injection de carburant pour un moteur a combustion interne de vehicule automobile, equipe d'un generateur de signal de commande de coupure de carburant
FR2414629A1 (fr) * 1978-01-17 1979-08-10 Bosch Gmbh Robert Procede et dispositif pour commander l'alimentation en carburant d'un moteur a combustion interne
JPS59150933A (ja) * 1983-02-15 1984-08-29 Fujitsu Ten Ltd 電子式燃料噴射装置の噴射制御方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Bosch, Technische Unterrichtung, Motronic, KH/VDT-09.85-De, S. 20, 21, 26-28 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 284 (M-348)[1721], 26. Dezember 1984; & JP-A-59 150 933 (FUJITSU TEN K.K.) 29-08-1984 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3805488A1 (de) * 1987-02-27 1988-09-08 Fuji Heavy Ind Ltd Kraftstoffsteuerungssystem fuer einen kraftfahrzeugmotor
WO1989008776A1 (fr) * 1988-03-16 1989-09-21 Robert Bosch Gmbh Procede permettant d'eviter un moment d'entrainement trop eleve
WO1990002258A1 (fr) * 1988-08-25 1990-03-08 Robert Bosch Gmbh Dispositif de regulation d'un parametre de fonctionnement d'un moteur a combustion interne
US5048482A (en) * 1988-08-25 1991-09-17 Robert Bosch Gmbh Device for controlling an operating characteristic of an internal combustion engine

Also Published As

Publication number Publication date
JPS61291741A (ja) 1986-12-22
DE3521551A1 (de) 1986-12-18
JPH07103823B2 (ja) 1995-11-08
EP0205916A3 (en) 1987-10-28
BR8602749A (pt) 1987-02-10
US4700673A (en) 1987-10-20
DE3665204D1 (en) 1989-09-28
EP0205916B1 (fr) 1989-08-23

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