EP0054112A2 - Méthode et système de dosage de carburant commandé électroniquement pour un moteur à combustion interne - Google Patents

Méthode et système de dosage de carburant commandé électroniquement pour un moteur à combustion interne Download PDF

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Publication number
EP0054112A2
EP0054112A2 EP81107657A EP81107657A EP0054112A2 EP 0054112 A2 EP0054112 A2 EP 0054112A2 EP 81107657 A EP81107657 A EP 81107657A EP 81107657 A EP81107657 A EP 81107657A EP 0054112 A2 EP0054112 A2 EP 0054112A2
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EP
European Patent Office
Prior art keywords
signal
metering system
load
value
tim
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
EP81107657A
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German (de)
English (en)
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EP0054112A3 (en
EP0054112B1 (fr
Inventor
Wolfram Dipl.-Ing. Becker
Helmut Dipl.-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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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0054112A2 publication Critical patent/EP0054112A2/fr
Publication of EP0054112A3 publication Critical patent/EP0054112A3/de
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Publication of EP0054112B1 publication Critical patent/EP0054112B1/fr
Expired 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2403—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially up/down counters
    • 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
    • F02D41/1497—With detection of the mechanical response of the engine
    • F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
    • 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
    • F02D2200/1015—Engines misfires

Definitions

  • the invention relates to an electronically controlled fuel metering system for an internal combustion engine according to the preamble of the main claim. It is known to avoid torque jumps and thus undesirable jerking of the internal combustion engine to monitor the individual metering signals and to limit changes in these metering signals. This takes place in the known system in that an upper and a lower limit value for the next following metering signal is formed on the basis of a certain metering signal and, if the changes are too great, these limit values come into effect.
  • an anti-jerk system is obtained which achieves good results with regard to driving behavior and exhaust gas composition even in critical operating conditions.
  • FIG. 1 shows a speed-load diagram with indication of a jerk-sensitive area
  • FIG. 2 shows various examples of the mode of operation of the system under different operating conditions
  • FIG. 3 shows a flow diagram in connection with a computer-controlled implementation of the invention
  • FIG. 4 shows a block diagram as an example of a hardware solution
  • Fig. 5 shows a detail on the subject of Fig. h.
  • the exemplary embodiment relates to an electrically controlled fuel metering system in an internal combustion engine with spark ignition, the fuel being metered in via pulse-controlled injection valves.
  • Jerking is a driving operation in which the vehicle is braked and accelerated again by cyclical torque fluctuations.
  • the reason lies in the type of load recording.
  • the load signal ti is proportional the air flow in the intake pipe and thus proportional to the output signal of the air flow meter and inversely proportional to the speed.
  • jerking an approximately constant air volume signal can be assumed, while the speed fluctuates around an average value.
  • a decrease in speed causes the mixture to enrich, while increasing speed leads to leaning.
  • FIG. 1 Such a map is shown in FIG. 1 and different areas for different countermeasures are drawn in this map, as well as a particularly critical area in which bucking due to the design of Engine and vehicle is particularly critical.
  • 2 shows various diagrams of the mode of operation of the exemplary embodiment in different operating states.
  • 2a shows a quite restless load signal (ti) whose individual values are averaged in a compensating sense.
  • FIG. 2b shows the signal behavior in a typical acceleration process, namely when the load signal rises sharply and exceeds certain change threshold values.
  • the situation with a slow load increase is shown in FIG. C.
  • the averaging is effective due to the fact that a certain change in the load signal has not yet been reached.
  • this averaging would lead to an ever greater gap between actual and averaged values, so that an approximation of these two different values must be ensured.
  • FIGS. 2d and e show the conditions in the event of a transition to overrun mode and in the case of slow load decrease.
  • FIG. 3 shows a flow chart for a computer-controlled solution of the fuel metering system according to the invention.
  • the second query in FIG. 13 concerns the thrust detection. If there is a transition to overrun mode, then either this newest value is switched through or, with a view to a smooth transition, an adapted new value according to the formula
  • tineu ti (k-1) + ⁇ ti / 2
  • the averaging takes place over the last maximum of eight load values. It takes place on the basis of the values stored in a shift register, with the shift register being loaded with the latest value in so-called push-through operation in stationary operation, while the oldest is lost.
  • the push mode control serves a counter to determine the ranking of the individual memory values.
  • a query for the maximum counter reading is denoted by 16 and a subtraction point for the last load value during stationary operation is denoted by 17.
  • the control of the shift register is characterized by a block 18, the latest load value occupying the shift register location Z1 after 19.
  • the respective load values are summed in block 20.
  • the subsequent division for averaging takes place in block 21. Since the deviation of the latest value from the mean is also processed, a corresponding calculation is provided in block 22.
  • the next interrogation unit 23 is used for the area classification.
  • Two interrogation units 24 and 25 follow, with which slow load decreases and slow load increases in the sense of FIGS. 2c and e are recorded. As long as the thresholds shown there have not yet been reached, the latest basic injection quantity value corresponds to the averaged load signal. Otherwise there is a progressive approximation to the respective load value according to the formula
  • tineu tiM + ⁇ tiM / 2
  • FIG. 4 An example of a hardware implementation is shown in FIG. 4.
  • the individual blocks of FIG. 4 are provided with the reference numbers known from FIG. 3 if they match, although the blocks of the flowchart basically represent pure arithmetic operations. while those of Fig. 4 mark circuit arrangements for realizing the special function.
  • timing element 35 for generating the quotient of air throughput and speed based on signals from a speed sensor 36 and an air quantity measuring device 37.
  • selection logic 38 for a desired switching of the individual variables depending on the individual driving conditions, and finally the valve winding of an injection valve 39 is indicated.
  • the signal line to this injection valve there are usually correction stages for at least the temperature and the battery voltage.
  • the individual structure is as follows.
  • the output of the timing element 35, at which the latest ti (k) value is present, is inevitably coupled to all those stages which process or pass on the current basic injection value or load value.
  • These are the selection logic 38, the difference formation stage 11 for successive load signals, a memory stage 40 for the respective previous load signal, a counter 30, which supplies the control signal for an adder 20 and the divider stage 21, and also a subtraction stage 22 for forming the difference between the current one Load value and the current mean value as well as a threshold level 23 for range inquiry.
  • the subtraction stage 11 is coupled to two comparators 12 and 13 for recognizing the acceleration and the transition to overrun mode, the output signals of which in turn can be switched to two control inputs 41 and 42 of the selection logic 38. Furthermore, these comparators 12 and 13 supply reset signals for the adder stage 20. This is because the averaging in the special example according to FIG. 4 is to be stopped in each of these transitional operating states and corresponding addition values are to be deleted. The same reset signal is also received by the shift register 18 and the counter 30. The respective counter reading of the counter 30 controls the adder 20, the progression of the contents of the shift register 18 and the divider 21. The output of this divider 21 is an average of the basic injection time tiM, which in turn is as Input variable for the subtraction stage 22, the division and addition stage 26 and for the selection logic 38 is used.
  • a further division and subtraction stage 15 supplies a ti (k-1) + ti / 2 signal for a further input of the selection logic 38.
  • the difference between the current load value and the current mean value is provided by the subtraction stage 22, which in turn provides the output signal to the divisions - And addition level 26 and a sign recognition level 42 passes on.
  • Another control input 45 of the selection logic 38 receives output signals from the threshold switches 24, 25 and 27, the output signals of which likewise reset the adder 20 and the counter 30.
  • the control stage 29 ensures that, depending on input signals at its three inputs 47, 48, 49, the latest load value tineu is written into the memory 40 for the previous load value as the newest value.
  • the input 47 is connected to the control input 45 of the selection logic 38, the input 48 to the control input 41 and finally the input 49 to the control input 42.
  • the control device 29 can be implemented by means of a triple-OR gate for the individual input variables.
  • FIG. 5 shows the required link
  • FIG. 5a again showing the diagram of the selection logic 38 with the individual data and value inputs
  • FIG. 5b shows a logic table according to which the individual switches shown in FIG. 5a are to be closed
  • the first line of the table according to FIG. 5b shows the case of acceleration
  • the second line shows the signal output during the transition to overrun mode
  • lines 3 and 4 indicate different cases of more or less stationary operation.
  • the fuel metering system described above is characterized in that it has very good driving behavior enabled in all operating conditions in all possible operating areas.

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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)
EP81107657A 1980-12-12 1981-09-26 Méthode et système de dosage de carburant commandé électroniquement pour un moteur à combustion interne Expired EP0054112B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3046863 1980-12-12
DE19803046863 DE3046863A1 (de) 1980-12-12 1980-12-12 Elektronisch gesteuertes kraftstoffzumesssystem fuer eine brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP0054112A2 true EP0054112A2 (fr) 1982-06-23
EP0054112A3 EP0054112A3 (en) 1984-06-13
EP0054112B1 EP0054112B1 (fr) 1988-03-30

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ID=6119005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107657A Expired EP0054112B1 (fr) 1980-12-12 1981-09-26 Méthode et système de dosage de carburant commandé électroniquement pour un moteur à combustion interne

Country Status (4)

Country Link
US (1) US4508082A (fr)
EP (1) EP0054112B1 (fr)
JP (1) JPS57122136A (fr)
DE (2) DE3046863A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106366A2 (fr) * 1982-10-20 1984-04-25 Hitachi, Ltd. Méthode de controle pour moteurs à combustion interne
EP0112673A1 (fr) * 1982-12-13 1984-07-04 Solex (U.K.) Limited Appareil électronique pour commander l'alimentation en carburant d'un moteur à combustion interne
EP0133426A2 (fr) * 1983-07-20 1985-02-20 VOEST-ALPINE AUTOMOTIVE Gesellschaft m.b.H. Méthode d'adaptation rapide de valeur moyenne, plus spécialement la moyenne arithmétique d'un signal quasi-périodique
EP0153493A2 (fr) * 1984-02-18 1985-09-04 Robert Bosch Gmbh Système de dosage de mélange pour moteur à combustion
DE3415214A1 (de) * 1984-04-21 1985-10-24 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur bestimmung eines den lastzustand einer brennkraftmaschine angebenden signals
EP0240988A2 (fr) * 1986-04-09 1987-10-14 Hitachi, Ltd. Dispositif de commande de vitesse de ralenti pour moteur d'un véhicule
EP0243042A2 (fr) * 1986-04-23 1987-10-28 Mitsubishi Denki Kabushiki Kaisha Appareil de commande de carburant pour moteur à combustion interne
EP0243041A2 (fr) * 1986-04-23 1987-10-28 Mitsubishi Denki Kabushiki Kaisha Appareil de commande de carburant pour moteur à combustion interne
EP0127510B1 (fr) * 1983-05-13 1987-12-16 Regie Nationale Des Usines Renault Procédé de coupure de l'injection de carburant pendant les phases de décélération d'un moteur à combustion interne
EP0286644B1 (fr) * 1986-10-10 1990-09-19 Robert Bosch Gmbh Procede pour determiner electroniquement le debit de carburant d'un moteur a combustion interne
US6737044B1 (en) 1998-04-03 2004-05-18 University College Cardiff Consultants Limited Aerosol composition

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5832932A (ja) * 1981-08-21 1983-02-26 Toyota Motor Corp 内燃機関の燃料噴射量制御方法
JPH0723701B2 (ja) * 1985-11-08 1995-03-15 富士通テン株式会社 電子制御燃料噴射装置
JPS62131945A (ja) * 1985-12-03 1987-06-15 Toyota Motor Corp 過給機を備えた内燃機関の燃料噴射装置
JPH01315642A (ja) * 1988-06-15 1989-12-20 Mitsubishi Electric Corp エンジンの燃料制御装置
JPH04194341A (ja) * 1990-11-27 1992-07-14 Mazda Motor Corp エンジンの燃料制御装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404114A1 (fr) * 1977-09-26 1979-04-20 Bendix Corp Agencement d'enrichissement d'accelerateur pour systeme d'alimentation en combustible a boucle fermee pour moteur a combustion interne
GB2007392A (en) * 1977-10-19 1979-05-16 Hitachi Ltd Input signal processor used in electronic engine control apparatus
GB2017973A (en) * 1978-04-04 1979-10-10 Bosch Gmbh Robert Fuel injection systems for internal combustion engines
DE2815067A1 (de) * 1978-04-07 1979-10-18 Bosch Gmbh Robert Einrichtung bei einer brennkraftmaschine zur korrektur eines kraftstoffzumessignals
US4214306A (en) * 1977-05-31 1980-07-22 Nippondenso Co., Ltd. Electronic fuel injection control apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455482A1 (de) * 1974-11-23 1976-05-26 Volkswagenwerk Ag Anordnung zur gewinnung von signalen fuer das steuergeraet einer elektronischen kraftstoffeinspritzung
DE2507917C2 (de) * 1975-02-24 1986-01-02 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur Regelung des optimalen Betriebsverhaltens einer Brennkraftmaschine
DE2804444A1 (de) * 1978-02-02 1979-08-09 Bosch Gmbh Robert Elektronische steuereinrichtung fuer ein kraftstoffeinspritzsystem bei brennkraftmaschinen
US4257377A (en) * 1978-10-05 1981-03-24 Nippondenso Co., Ltd. Engine control system
JPS56101030A (en) * 1980-01-18 1981-08-13 Toyota Motor Corp Method of electronically controlled fuel injection for internal combustion engine
JPS56162234A (en) * 1980-05-16 1981-12-14 Toyota Motor Corp Electronic type fuel injection control apparatus
JPS572430A (en) * 1980-06-04 1982-01-07 Hitachi Ltd Electronic fuel control method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214306A (en) * 1977-05-31 1980-07-22 Nippondenso Co., Ltd. Electronic fuel injection control apparatus
FR2404114A1 (fr) * 1977-09-26 1979-04-20 Bendix Corp Agencement d'enrichissement d'accelerateur pour systeme d'alimentation en combustible a boucle fermee pour moteur a combustion interne
GB2007392A (en) * 1977-10-19 1979-05-16 Hitachi Ltd Input signal processor used in electronic engine control apparatus
GB2017973A (en) * 1978-04-04 1979-10-10 Bosch Gmbh Robert Fuel injection systems for internal combustion engines
DE2815067A1 (de) * 1978-04-07 1979-10-18 Bosch Gmbh Robert Einrichtung bei einer brennkraftmaschine zur korrektur eines kraftstoffzumessignals

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106366A2 (fr) * 1982-10-20 1984-04-25 Hitachi, Ltd. Méthode de controle pour moteurs à combustion interne
EP0106366B1 (fr) * 1982-10-20 1988-06-08 Hitachi, Ltd. Méthode de controle pour moteurs à combustion interne
EP0112673A1 (fr) * 1982-12-13 1984-07-04 Solex (U.K.) Limited Appareil électronique pour commander l'alimentation en carburant d'un moteur à combustion interne
EP0127510B1 (fr) * 1983-05-13 1987-12-16 Regie Nationale Des Usines Renault Procédé de coupure de l'injection de carburant pendant les phases de décélération d'un moteur à combustion interne
EP0133426A2 (fr) * 1983-07-20 1985-02-20 VOEST-ALPINE AUTOMOTIVE Gesellschaft m.b.H. Méthode d'adaptation rapide de valeur moyenne, plus spécialement la moyenne arithmétique d'un signal quasi-périodique
EP0133426A3 (en) * 1983-07-20 1986-11-20 Friedmann & Maier Aktiengesellschaft Method for the rapid control of an average value, especially the arithmetic average of an almost periodic signal
EP0153493A2 (fr) * 1984-02-18 1985-09-04 Robert Bosch Gmbh Système de dosage de mélange pour moteur à combustion
EP0153493A3 (en) * 1984-02-18 1986-12-03 Robert Bosch Gmbh Mixture-measuring system for a combustion engine
DE3415214A1 (de) * 1984-04-21 1985-10-24 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur bestimmung eines den lastzustand einer brennkraftmaschine angebenden signals
EP0240988A3 (fr) * 1986-04-09 1988-03-09 Hitachi, Ltd. Dispositif de commande de vitesse de ralenti pour moteur d'un véhicule
EP0240988A2 (fr) * 1986-04-09 1987-10-14 Hitachi, Ltd. Dispositif de commande de vitesse de ralenti pour moteur d'un véhicule
EP0243041A2 (fr) * 1986-04-23 1987-10-28 Mitsubishi Denki Kabushiki Kaisha Appareil de commande de carburant pour moteur à combustion interne
EP0243042A2 (fr) * 1986-04-23 1987-10-28 Mitsubishi Denki Kabushiki Kaisha Appareil de commande de carburant pour moteur à combustion interne
EP0243042B1 (fr) * 1986-04-23 1990-11-28 Mitsubishi Denki Kabushiki Kaisha Appareil de commande de carburant pour moteur à combustion interne
EP0243041B1 (fr) * 1986-04-23 1990-11-28 Mitsubishi Denki Kabushiki Kaisha Appareil de commande de carburant pour moteur à combustion interne
EP0286644B1 (fr) * 1986-10-10 1990-09-19 Robert Bosch Gmbh Procede pour determiner electroniquement le debit de carburant d'un moteur a combustion interne
US6737044B1 (en) 1998-04-03 2004-05-18 University College Cardiff Consultants Limited Aerosol composition
US7481995B2 (en) 1998-04-03 2009-01-27 University College Cardiff Consultants Limited Aerosol composition

Also Published As

Publication number Publication date
DE3176695D1 (en) 1988-05-05
EP0054112A3 (en) 1984-06-13
EP0054112B1 (fr) 1988-03-30
US4508082A (en) 1985-04-02
JPS57122136A (en) 1982-07-29
JPH0159420B2 (fr) 1989-12-18
DE3046863A1 (de) 1982-07-22

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