EP0153493A2 - Système de dosage de mélange pour moteur à combustion - Google Patents

Système de dosage de mélange pour moteur à combustion Download PDF

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Publication number
EP0153493A2
EP0153493A2 EP84116261A EP84116261A EP0153493A2 EP 0153493 A2 EP0153493 A2 EP 0153493A2 EP 84116261 A EP84116261 A EP 84116261A EP 84116261 A EP84116261 A EP 84116261A EP 0153493 A2 EP0153493 A2 EP 0153493A2
Authority
EP
European Patent Office
Prior art keywords
output
mixture
output variable
metering system
correction value
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
EP84116261A
Other languages
German (de)
English (en)
Other versions
EP0153493B1 (fr
EP0153493A3 (en
Inventor
Günter Braun
Werner Dipl.-Ing. Jundt
Norbert Dipl.-Ing. Miller
Jürgen Näger
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
Priority to AT84116261T priority Critical patent/ATE41813T1/de
Publication of EP0153493A2 publication Critical patent/EP0153493A2/fr
Publication of EP0153493A3 publication Critical patent/EP0153493A3/de
Application granted granted Critical
Publication of EP0153493B1 publication Critical patent/EP0153493B1/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
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
    • 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
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
    • F02D41/1481—Using a delaying circuit
    • 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
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen

Definitions

  • the invention is based on a mixture metering system for an internal combustion engine with a digital computing unit according to the preamble of the main claim.
  • a mixture metering system is disclosed for example in DE-OS 31 24 676 (US-SN 38 63 076).
  • the mixture metering system according to the invention for an internal combustion engine with a digital arithmetic unit.
  • it makes it possible, regardless of the time of the change in the output variable of a signal generating means in relation to the timed, delayed signal processing of this output signal of the burner to provide an optimal mixture to the engine.
  • delayed signal processing of this output signal of the burner to provide an optimal mixture to the engine.
  • a low concentration of pollutants in the exhaust gas can be ensured. It has proven to be advantageous to influence the mixture metering as a function of at least the delay time and / or the timing of the digital computing unit.
  • FIG. 1 shows a rough overview of a mixture metering system with a microcomputer
  • FIG. 2 shows a block diagram of the mixture metering system according to the invention
  • FIG. 3 shows a time diagram to explain the functioning of the mixture metering system in FIG. 2.
  • the mixture metering system in connection with the correction function according to the invention is, however, independent of the method of metering the mixture, so that the invention can also be used in connection with carburetor systems, for example.
  • the representation of the mixture metering system according to the invention on the basis of a block diagram (FIG. 2) does not limit a practical embodiment to a single possibility of implementation.
  • the implementation by means of a freely programmable computer is therefore problem-free because the invention can be clearly recognized as such and therefore does not cause any problems for a person skilled in the field of electronic mixture metering systems.
  • FIG. 1 shows a schematic overview of a computer-controlled system with the most important components.
  • 11 denotes an arithmetic logic unit which is coupled via a data control and address bus 12 to a memory 13 and to an input / output unit 14.
  • this unit 14 receives various input variables i K and outputs various output variables O K , for example an injection duration for the quantity of fuel to be metered or a signal for the actuator in one Air bypass of a carburetor system.
  • FIG. 2 an embodiment of the invention is shown as a block diagram.
  • a setpoint value information U ⁇ S is present on the probe signal evaluation unit 21, which represents setpoint value information for the air-force ratio to be metered to the internal combustion engine.
  • the signals F R of the output unit 25 and a precontrol unit 28 are fed to a mixture formation unit 27, the precontrol unit 28 input variables via operating parameters of the combustion Engine such as speed, load or temperature and the like processed.
  • the mixture formation unit 27 influences an internal combustion engine 29, the exhaust gas 30 expelled from the internal combustion engine washing around the exhaust gas probe 15 and influencing its output variable U ⁇ I , so that the control loop for mixture formation is closed.
  • the function of the components of the probe signal evaluation unit 21, time stage 22, control unit 23 as well as correction stage 24 and output unit 25 can also be realized with the aid of a correspondingly programmed microcomputer 31, indicated by dashed lines in FIG.
  • the pilot control by means of the pilot control unit 28 and the timing unit 26 can also be integrated in the microcomputer 31.
  • This exhaust gas probe output is compared in the probe signal evaluation unit 21 with the target value U AS and with a counting frequency, the period of which is marked with T, sampled.
  • the corresponding output signal U S of the probe signal evaluation unit 21 is plotted in FIG. 3b.
  • This signal is possibly delayed by a desired time, on the one hand directly to the correction stage 24 and on the other hand via the time stage 22, which essentially serves to shift the average air-fuel ratio, to the control unit 23.
  • the output signals of the control device 23 via the output unit 25 influence the mixture formation unit 27, for example multiplicatively by a factor F R. Since the time period T 2 between two successive outputs of the output unit 25 generally assumes different values compared to the sampling rate T 1 , namely in particular larger values, for various programming reasons, as shown in FIGS. 3d and e, time delays between the actual switching operation of the probe can occur and passing this on. Switching occur through the output unit 25. This may result in more or less short-term mean shifts in the output signal F R , so that, under certain circumstances, a considerable deviation from the air ratio required for a possible catalytic exhaust gas aftertreatment occurs.
  • Correction stage 24 is required for this purpose, the mode of operation of which is explained in more detail below.
  • Exemplary embodiments of the invention have been described using a lambda-controlled mixture metering system for an internal combustion engine.
  • the essence of the invention is not restricted in particular to a lambda-controlled mixture metering system.
  • the invention can always be used when the integral behavior of the output signals of a sensor or a probe or in general a signal generating means, in particular for the mixture metering, plays a role and a time delay arises due to the time-clocked, delayed signal processing of these signals.
  • Idle charge control, exhaust gas recirculation control, knock control, extreme value control and the like can be mentioned as further control methods for the mixture composition of an internal combustion engine, in which the invention can be used.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)
EP84116261A 1984-02-18 1984-12-22 Système de dosage de mélange pour moteur à combustion Expired EP0153493B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84116261T ATE41813T1 (de) 1984-02-18 1984-12-22 Gemischzumesssystem fuer eine brennkraftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843405916 DE3405916A1 (de) 1984-02-18 1984-02-18 Gemischzumesssystem fuer eine brennkraftmaschine
DE3405916 1984-02-18

Publications (3)

Publication Number Publication Date
EP0153493A2 true EP0153493A2 (fr) 1985-09-04
EP0153493A3 EP0153493A3 (en) 1986-12-03
EP0153493B1 EP0153493B1 (fr) 1989-03-29

Family

ID=6228157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116261A Expired EP0153493B1 (fr) 1984-02-18 1984-12-22 Système de dosage de mélange pour moteur à combustion

Country Status (5)

Country Link
US (1) US4689746A (fr)
EP (1) EP0153493B1 (fr)
JP (1) JPS60190628A (fr)
AT (1) ATE41813T1 (fr)
DE (2) DE3405916A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8450931B2 (en) 2005-05-10 2013-05-28 Dow Corning Corporation Process for minimizing electromigration in an electronic device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3825749A1 (de) * 1988-07-29 1990-03-08 Daimler Benz Ag Verfahren zur adaptiven steuerung einer brennkraftmaschine und/oder einer anderen antriebskomponente eines kraftfahrzeuges
JP4286880B2 (ja) * 2007-04-25 2009-07-01 本田技研工業株式会社 制御パラメータを探索するためのプログラム

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2423806A1 (fr) * 1977-05-26 1979-11-16 Anvar Procede de regulation a modele de reference et regulateur mettant en oeuvre ce procede
US4307694A (en) * 1980-06-02 1981-12-29 Ford Motor Company Digital feedback system
CA1174334A (fr) * 1980-06-17 1984-09-11 William G. Rado Regulateur de dosage air-carburant par retroaction
FR2485641A1 (fr) * 1980-06-26 1981-12-31 Renault Procede et dispositif de commande electronique d'allumage pour moteur a combustion interne
US4337745A (en) * 1980-09-26 1982-07-06 General Motors Corporation Closed loop air/fuel ratio control system with oxygen sensor signal compensation
US4345194A (en) * 1980-12-01 1982-08-17 The United States Of America As Represented By The United States Department Of Energy Control system to reduce the effects of friction in drive trains of continuous-path-positioning systems
DE3046863A1 (de) * 1980-12-12 1982-07-22 Robert Bosch Gmbh, 7000 Stuttgart Elektronisch gesteuertes kraftstoffzumesssystem fuer eine brennkraftmaschine
US4409650A (en) * 1981-03-04 1983-10-11 Shin Meiwa Industry Co., Ltd. Automatic position controlling apparatus
JPS5813140A (ja) * 1981-07-17 1983-01-25 Nissan Motor Co Ltd 外部調整機能付きエンジン電子制御装置
JPS59194053A (ja) * 1983-04-18 1984-11-02 Toyota Motor Corp 内燃機関の空燃比制御方法および空燃比制御装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8450931B2 (en) 2005-05-10 2013-05-28 Dow Corning Corporation Process for minimizing electromigration in an electronic device

Also Published As

Publication number Publication date
ATE41813T1 (de) 1989-04-15
EP0153493B1 (fr) 1989-03-29
US4689746A (en) 1987-08-25
DE3477502D1 (en) 1989-05-03
EP0153493A3 (en) 1986-12-03
JPS60190628A (ja) 1985-09-28
DE3405916A1 (de) 1985-08-22

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