EP0142011A2 - Appareil pour déterminer la composition du mélange dans un moteur à combustion - Google Patents

Appareil pour déterminer la composition du mélange dans un moteur à combustion Download PDF

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Publication number
EP0142011A2
EP0142011A2 EP84111992A EP84111992A EP0142011A2 EP 0142011 A2 EP0142011 A2 EP 0142011A2 EP 84111992 A EP84111992 A EP 84111992A EP 84111992 A EP84111992 A EP 84111992A EP 0142011 A2 EP0142011 A2 EP 0142011A2
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
fuel metering
influencing
speed
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Withdrawn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
EP84111992A
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German (de)
English (en)
Other versions
EP0142011A3 (fr
Inventor
Albrecht Dipl.-Ing. Clement
Dieter Dipl.-Ing. Mayer
Ernst Dipl.-Ing. Wild
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 EP0142011A2 publication Critical patent/EP0142011A2/fr
Publication of EP0142011A3 publication Critical patent/EP0142011A3/fr
Withdrawn legal-status Critical Current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
    • F02D41/14—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
    • 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
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2454—Learning of the air-fuel ratio control

Definitions

  • the invention relates to a device for a fuel metering system in an internal combustion engine according to the preamble of the main claim.
  • These control systems for controlling the air ratio ⁇ have been known for a long time and have been described in detail in the literature.
  • DE-OS 30 36 107 discloses an adaptive ⁇ control device for a fuel metering system in an internal combustion engine, in which multiplicative and additive correction variables are formed in addition to the existing control and are stored in non-volatile memories.
  • the control device enables additive control of the A shift in the lower part-load range and in the idling range, in the upper part-load range and under full load conditions. Through this measure, the pilot control of the value is gradually adapted to changing operating parameters of the internal combustion engine.
  • This special type of adaptation is based on the knowledge that essentially additive errors occur when the internal combustion engine is only slightly loaded and multiplicative errors occur in the pilot control of the lambda value when the internal combustion engine is heavily loaded.
  • Additive errors can in particular be caused by so-called leakage air components, these are air components that are not registered by the load sensor, for example an air flow meter.
  • Multiplicative errors can, for example, be caused by temperature or pressure fluctuations which relate to the density of the fuel or the amount of air drawn in.
  • the device according to the invention for a fuel metering system in an internal combustion engine with the features of the main claim enables the pilot control of the lambda control to be optimally adapted. Because a further, speed-dependent correction of the pilot control values is carried out, errors can now also be compensated for, which are of an additive speed-dependent nature. Such additive speed-dependent errors can occur, for example, due to wear-dependent long-term drifts on the fuel metering elements.
  • the inventive step begins here, namely in the detection of these functional dependencies of the sources of error.
  • the object of the device according to the invention is therefore to improve the driving and exhaust gas behavior of lambda-controlled internal combustion engines.
  • FIG. 1 shows a rough block diagram of a lambda control device according to the prior art
  • FIG. 2 shows a characteristic diagram to explain the functioning of the device according to the invention
  • FIG. 3 shows a schematically illustrated exemplary embodiment of the device according to the invention.
  • FIG. 1 A block diagram of a lambda control device for an internal combustion engine according to the prior art is shown in FIG. 1.
  • a timing element denoted by 10 to which the essential operating parameters of the internal combustion engine are fed as an input variable, is connected on the output side to two multiplier stages 11, 12 which are connected in series.
  • the multiplier stage 12 is followed by an adder stage 13, which on the output side controls injection valves 14 of an internal combustion engine (not shown further).
  • An oxygen probe 15 attached in the exhaust pipe of the internal combustion engine, not shown, is connected to a controller 18 via a comparator 16 and a switch 17.
  • the output signals of the controller 18 are fed via a limiter 19 to the multiplier 11, via a switch 22 'and a control stage 20 to the multiplier 12, and via a correction stage 21 and a switch 22 to the adder 13.
  • a pulse length-modulated signal tp is formed in the timing element 10, which signal is corrected by the subsequent multiplier stages 11, 12 and by the adder stage 13 essentially as a function of the output signal of the oxygen probe 15.
  • the intervention in the fuel metering via the multiplier 11 allows the air / fuel mixture to be adjusted to a predetermined value in the stationary operation of the internal combustion engine.
  • the output signal of the controller 18 is additionally used to control the controller intervention at a symmetrical distance from the limitation and for additive correction in the lower load range and in the idle case.
  • the regulation to a symmetrical distance between the controller intervention and the limitation corresponds to an average shift and is achieved by means of the control stage 20.
  • the additive correction in the lower load range of the internal combustion engine enables the correction stage 21 via, for example, the switch 22 and the adder stage 13.
  • the switch 22 is only used when the engine is idling or actuated in the lower load range.
  • the correction values for the multiplier stage 12 and the adder stage 13 are stored in memories (not shown) and also remain effective in other operating areas of the internal combustion engine.
  • Figure 2 shows a schematic representation of the adaptation areas of the device according to the invention as a function of the load M and the speed n of the internal combustion engine.
  • a load threshold MLS 2 the multiplicative correction value fm is adjusted until the correction factor of the multiplier 11 assumes the neutral value 1.
  • the additive, speed-independent factor ga is adjusted below a load threshold MLS1 and below a speed threshold NS1.
  • Such a procedure for adapting the feedforward control is known, for example, from the aforementioned publication. It has now been shown that with this two-parameter correction of the precontrol, optimal behavior of the internal combustion engine cannot always be achieved.
  • the essence of the invention is based on the knowledge of introducing a third correction value gn, which additionally influences the feedforward control in proportion to the speed.
  • the load speed range in which this value gn is corrected lies between the load thresholds MLS3 and MLS4 and above a speed NS2.
  • the MLS4 threshold which precludes an adjustment of the value gn in very low load ranges, was introduced for technical driving reasons - in this range there is a very poor combustion of the air-fuel mixture. No adjustment of these correction values is carried out in all other operating areas of the internal combustion engine. However, these correction values are effective in all operating areas of the internal combustion engine.
  • FIG. 3 an embodiment of the device according to the invention is shown in more detail.
  • 30 designates an internal combustion engine in which a lambda probe 31 is exposed to the exhaust gas.
  • the fuel metering signal of the internal combustion engine in the present special case it is a spark-ignited internal combustion engine with injection, is formed on the basis of the output signal of a load sensor, for example an air flow meter, and the speed in a multiplier 32.
  • This injection period t L is provided with the correction factor F R via the usual lambda control loop consisting of a comparator 34, a controller 35 and the multiplier 33.
  • the interventions in the injection period via a multiplier 36, an adder 37 and an adder 38 serve to adapt the pilot control.
  • the output signal of the controller 35 is smoothed via a low-pass filter 39, compared in a comparator 40 with a desired value and then fed to three controllers 44, 45 and 46 via switches 41, 42 and 43.
  • the controller 44 is connected to the adder 38 via a multiplier 47, to which speed information is supplied, and via a memory (not shown).
  • the controller 45 is connected to the adder 37 and the controller 46 to the multiplier 36 via a memory (not shown).
  • the power output of the internal combustion engine is at values which are characterized by an intake air quantity between the limits MLS3 and MLS4 and if the speed is above the threshold NS2, switch 3 is closed and switches 1 and 2 are opened.
  • This additive speed-proportional correction value gn is also adjusted until the averaged output variable of the controller 35 corresponds to the predetermined target value applied to the comparator 40.
  • the controllers 44, 45 and 46 are assigned a relatively large time constant, which can extend into the minute range. How to test the The device according to the invention has shown, the pilot control of the injection time can be tracked excellently to the changing parameters of the internal combustion engine.
  • the factor F R2 which characterizes the direct influence of the superimposed lambda control, generally takes on the value 1 and deviates from it only briefly, if at all.
  • This feedforward control is particularly important in those operating states of the internal combustion engine in which either the lambda probe is not ready for operation or the deceleration of the controlled system, particularly in transition areas of the internal combustion engine, plays a dominant role.
  • the exhaust gas quality and the operating behavior of the internal combustion engine are then determined solely by the pilot control.
  • the measures described here significantly improve the pilot control of the fuel metering.
EP84111992A 1983-11-12 1984-10-06 Appareil pour déterminer la composition du mélange dans un moteur à combustion Withdrawn EP0142011A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833341015 DE3341015A1 (de) 1983-11-12 1983-11-12 Einrichtung fuer die gemischaufbereitung bei einer brennkraftmaschine
DE3341015 1983-11-12

Publications (2)

Publication Number Publication Date
EP0142011A2 true EP0142011A2 (fr) 1985-05-22
EP0142011A3 EP0142011A3 (fr) 1986-10-08

Family

ID=6214193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111992A Withdrawn EP0142011A3 (fr) 1983-11-12 1984-10-06 Appareil pour déterminer la composition du mélange dans un moteur à combustion

Country Status (6)

Country Link
US (1) US4584982A (fr)
EP (1) EP0142011A3 (fr)
JP (2) JPS60108536A (fr)
AU (1) AU559757B2 (fr)
BR (1) BR8405716A (fr)
DE (1) DE3341015A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265079A2 (fr) * 1986-10-21 1988-04-27 Japan Electronic Control Systems Co., Ltd. Appareil adaptatif de commande de rapport air/fuel dans un moteur à combustion interne
WO1989004424A1 (fr) * 1987-11-10 1989-05-18 Robert Bosch Gmbh Systeme de regulation de la proportion air/carburant d'un moteur a combustion interne
EP0358062A2 (fr) * 1988-09-05 1990-03-14 Hitachi, Ltd. Méthode de commande du rapport air/carburant dans un moteur à combustion interne et appareil de commande

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2554854B2 (ja) * 1984-07-27 1996-11-20 富士重工業株式会社 自動車用エンジンの学習制御方法
JPS61169635A (ja) * 1985-01-23 1986-07-31 Hitachi Ltd 空燃比制御方法
JPH0723702B2 (ja) * 1986-12-27 1995-03-15 マツダ株式会社 燃料制御装置
US4991102A (en) * 1987-07-09 1991-02-05 Hitachi, Ltd. Engine control system using learning control
US5094208A (en) * 1988-12-10 1992-03-10 Robert Bosch Gmbh Fuel control system
US4977881A (en) * 1989-01-19 1990-12-18 Fuji Jukogyo Kabushiki Kaisha Air-fuel ratio control system for automotive engine
DE3925877C2 (de) * 1989-08-04 1998-10-08 Bosch Gmbh Robert Verfahren und Einrichtung zur Steuerung der Kraftstoffzumessung bei einer Dieselbrennkraftmaschine
DE4128718C2 (de) * 1991-08-29 2001-02-01 Bosch Gmbh Robert Verfahren und Vorrichtung zur Kraftstoffmengenregelung für einen Verbrennungsmotor mit Katalysator
DE4423241C2 (de) * 1994-07-02 2003-04-10 Bosch Gmbh Robert Verfahren zur Einstellung der Zusammensetzung des Betriebsgemisches für eine Brennkraftmaschine
DE19955649C2 (de) * 1999-11-19 2002-01-10 Bosch Gmbh Robert Elektronische Motorsteuerung einer Brennkraftmaschine
DE10043093A1 (de) 2000-09-01 2002-03-14 Bosch Gmbh Robert Verfahren zur Gemischadaption bei Verbrennungsmotoren mit Benzindirekteinspritzung
DE10043072A1 (de) 2000-09-01 2002-03-14 Bosch Gmbh Robert Verfahren zur Gemischadaption bei Verbrennungsmotoren mit Benzindirekteinspritzung
DE10043256A1 (de) 2000-09-02 2002-03-14 Bosch Gmbh Robert Verfahren zur Gemischadaption
DE10043859A1 (de) 2000-09-04 2002-03-14 Bosch Gmbh Robert Verfahren zur Diagnose der Gemischbildung
WO2003038532A1 (fr) * 2001-10-25 2003-05-08 Robert Bosch Gmbh Dispositif de correction d'un signal
DE10202156B4 (de) * 2002-01-22 2010-08-26 Volkswagen Ag Verfahren zum Betreiben einer Brennkraftmaschine
DE10232537A1 (de) 2002-07-18 2004-01-29 Robert Bosch Gmbh Verfahren zur Adaption eines Kraftstoff-Luft-Gemisches bei einem Verbrennungsmotor und elektronische Steuereinrichtung
DE10338058A1 (de) * 2003-06-03 2004-12-23 Volkswagen Ag Verfahren zum Betreiben einer Brennkraftmaschine
DE10337228A1 (de) * 2003-08-13 2005-03-17 Volkswagen Ag Verfahren zum Betreiben einer Brennkraftmaschine
DE102007016572B4 (de) 2007-04-07 2018-08-02 Volkswagen Ag Verfahren zum Betreiben einer Brennkraftmaschine
DE102011006587A1 (de) 2011-03-31 2012-10-04 Robert Bosch Gmbh Verfahren zur Adaption eines Kraftstoff-Luft-Gemischs für eine Brennkraftmaschine
DE102015200898B3 (de) * 2015-01-21 2015-11-05 Continental Automotive Gmbh Vorsteuerung eines Verbrennungsmotors
DE102021201323A1 (de) 2021-02-12 2022-08-18 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren und Vorrichtung zum Betreiben eines Verbrennungsmotors mit einem vorgegebenen Luft-Kraftstoff-Gemisch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2014655A (en) * 1978-02-14 1979-08-30 Nippon Denso Co Fuel injection system for an internal combustion engine
GB2084353A (en) * 1980-09-25 1982-04-07 Bosch Gmbh Robert Automatic control of the air-fuel ratio in ic engines
US4408588A (en) * 1979-02-01 1983-10-11 Robert Bosch Gmbh Apparatus for supplementary fuel metering in an internal combustion engine
JPS58190533A (ja) * 1982-04-30 1983-11-07 Toyota Motor Corp 空燃比制御装置

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JPS511836A (en) * 1974-06-21 1976-01-09 Nissan Motor Nainenkikanno nenryoseigyosochi
JPS5297028A (en) * 1976-02-12 1977-08-15 Nissan Motor Co Ltd Air fuel ratio controller
JPS6011220B2 (ja) * 1978-12-06 1985-03-23 日産自動車株式会社 燃料噴射装置
JPS57165645A (en) * 1981-04-07 1982-10-12 Nippon Denso Co Ltd Control method of air-fuel ratio
JPS5810126A (ja) * 1981-07-09 1983-01-20 Toyota Motor Corp 電子制御燃料噴射機関の補正値算出方法
JPS5825540A (ja) * 1981-08-10 1983-02-15 Nippon Denso Co Ltd 空燃比制御方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2014655A (en) * 1978-02-14 1979-08-30 Nippon Denso Co Fuel injection system for an internal combustion engine
US4408588A (en) * 1979-02-01 1983-10-11 Robert Bosch Gmbh Apparatus for supplementary fuel metering in an internal combustion engine
GB2084353A (en) * 1980-09-25 1982-04-07 Bosch Gmbh Robert Automatic control of the air-fuel ratio in ic engines
JPS58190533A (ja) * 1982-04-30 1983-11-07 Toyota Motor Corp 空燃比制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 8, Nr. 35 (M-276) [1472], 15. Februar 1984; & JP-A-58 190 533 (TOYOTA) 07-11-83; & US-A-4 501 243 (NIIMI et al.) (Kat. E) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265079A2 (fr) * 1986-10-21 1988-04-27 Japan Electronic Control Systems Co., Ltd. Appareil adaptatif de commande de rapport air/fuel dans un moteur à combustion interne
EP0265079A3 (en) * 1986-10-21 1988-12-07 Japan Electronic Control Systems Co., Ltd. Apparatus for learning and controlling air/fuel ratio in internal combustion engine
WO1989004424A1 (fr) * 1987-11-10 1989-05-18 Robert Bosch Gmbh Systeme de regulation de la proportion air/carburant d'un moteur a combustion interne
EP0358062A2 (fr) * 1988-09-05 1990-03-14 Hitachi, Ltd. Méthode de commande du rapport air/carburant dans un moteur à combustion interne et appareil de commande
EP0358062A3 (fr) * 1988-09-05 1991-05-02 Hitachi, Ltd. Méthode de commande du rapport air/carburant dans un moteur à combustion interne et appareil de commande

Also Published As

Publication number Publication date
EP0142011A3 (fr) 1986-10-08
JP2522490Y2 (ja) 1997-01-16
JPS60108536A (ja) 1985-06-14
AU559757B2 (en) 1987-03-19
US4584982A (en) 1986-04-29
BR8405716A (pt) 1985-09-10
DE3341015C2 (fr) 1987-03-26
AU3329884A (en) 1985-05-16
DE3341015A1 (de) 1985-05-30
JPH0592444U (ja) 1993-12-17

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