EP0482048B1 - Verfahren zur steuerung einer brennkraftmaschine - Google Patents

Verfahren zur steuerung einer brennkraftmaschine Download PDF

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Publication number
EP0482048B1
EP0482048B1 EP90910722A EP90910722A EP0482048B1 EP 0482048 B1 EP0482048 B1 EP 0482048B1 EP 90910722 A EP90910722 A EP 90910722A EP 90910722 A EP90910722 A EP 90910722A EP 0482048 B1 EP0482048 B1 EP 0482048B1
Authority
EP
European Patent Office
Prior art keywords
temperature
air
intake air
family
combustion engine
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.)
Revoked
Application number
EP90910722A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0482048A1 (de
Inventor
Stefan Krebs
Erwin Achleitner
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8201625&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0482048(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0482048A1 publication Critical patent/EP0482048A1/de
Application granted granted Critical
Publication of EP0482048B1 publication Critical patent/EP0482048B1/de
Anticipated expiration legal-status Critical
Revoked 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • 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
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2422—Selective use of one or more tables
    • 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
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature

Definitions

  • the invention relates to a method for controlling an internal combustion engine according to the preamble of claim 1.
  • the invention is therefore based on the object of developing the method according to the preamble in such a way that the precontrol is more accurate.
  • the invention is based on the insight that the density of the air in the cylinder - and thus the air mass per stroke and the amount of fuel to be metered - is not adequately described by the temperature of the intake air. Rather, the temperature of the intake air within the intake tract is increased by additional heating, which is dependent on the load condition of the internal combustion engine.
  • the temperature value of the correction factor is therefore read out from a temperature map, specifically as a function of a heating temperature and the air mass flow, that is to say as a function of parameters which represent the load state of the internal combustion engine.
  • the heating temperature is a temperature value which describes the respective thermal state of the internal combustion engine and in particular its intake tract and which is decisive for the heating of the intake air in the intake tract.
  • the temperature at a representative Point of the intake tract for example, the temperature at a representative Point of the intake tract.
  • a calculated value of a corrected intake air temperature according to the formula is calculated for each support point of the heating temperature and for each support point of the air mass flow calculated;
  • the respective temperature of the intake air TAL is then subtracted from this value and the result is entered as the correction temperature TK in the support point of the temperature map.
  • the basic map for a specific internal combustion engine is determined on the test bench, this internal combustion engine being operated with a control device which, according to the invention, calculates the fuel mass supplied per cylinder and cycle using the previously determined temperature map.
  • the variables speed and intake pressure for the individual support points of the basic map are set and the associated fuel base value is changed until the desired value is obtained, usually in accordance with the stoichiometric mixture ratio between fuel and air :
  • the fuel base value obtained in this way is then entered in the base map.
  • the fuel mass actually injected deviates from this fuel base value in accordance with the correction according to the invention.
  • the basic map contains "Adjusted" values that apply to the selected cooling water temperature and intake air temperature, from which influences of different heating temperatures are eliminated. Since the basic map is determined at constant heating temperature, i.e. constant temperature of the cooling water and intake air, a single characteristic of the temperature map is sufficient for this.
  • an internal combustion engine 1 is provided with a speed sensor 11, a pressure sensor 12 for the intake manifold pressure, a cooling water temperature sensor 13 and an intake air temperature sensor 14.
  • the output variables of these sensors, the speed n, the intake manifold pressure p, the cooling water temperature TKW and the intake air temperature TAL are fed to a control unit 2 as input variables. From this, control unit 2 determines an injection time t for injection valves 10 of internal combustion engine 1, by which the injected fuel mass is determined.
  • the control unit 2 is a microcomputer with the usual input and output circuitry. Its mode of operation for determining the injection time t is explained on the basis of a flow chart according to FIG. 2.
  • step S1 the current values for the speed n, the intake manifold pressure p, the cooling water temperature TKW and the intake air temperature TAL are read into a working memory of the microcomputer.
  • a temperature difference TD is formed from the cooling water temperature TKW and the intake air temperature TAL.
  • step S3 a basic injection time tB is then read from the basic characteristic diagram stored in a read-only memory of the control unit 2.
  • the intake manifold pressure and speed n serve as input parameters.
  • the basic injection times tB are then calculated from the injection time t multiplied by the quotient of a respective corrected intake air temperature TALK associated with the load and the intake air temperature TALa selected for the design conditions.
  • the intake manifold pressure p and the intake air mass LM are measured in each case.
  • the thermodynamic equation of state then gives the value of the corrected intake air temperature TALK where VZ is the cylinder volume and R is the gas constant.
  • step S4 the intake air mass LM is then calculated from the basic injection time tB multiplied by the speed n.
  • step S5 a correction temperature TK is read out from the correction map, which is likewise stored in a read-only memory of the control unit 2.
  • the values for the air mass LM and the temperature difference TD determined in steps S2, 3 and 4 serve as input variables.
  • correction temperatures TK are also determined experimentally.
  • the values for the corrected intake air temperature TALK are determined at different temperature differences TD similar to the method previously described for the design conditions.
  • the respective correction temperature TK then results after subtracting the respective underlying intake air temperature TAL.
  • the associated corrected intake air temperature TALK can now be determined by addition to the measured intake air temperature TAL, which corresponds in good approximation to the temperature of the intake air in the cylinder.
  • step S7 the injection time t is finally calculated, according to which the injection valves 10 are then activated.
  • the basic injection time tB is corrected in accordance with the corrected intake air temperature TALK by multiplying it by the quotient of the intake air temperature value TALa selected for the design conditions and this corrected intake air temperature TALK.

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)
EP90910722A 1989-07-14 1990-07-06 Verfahren zur steuerung einer brennkraftmaschine Revoked EP0482048B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP89112980 1989-07-14
EP89112980 1989-07-14
PCT/EP1990/001098 WO1991001442A1 (de) 1989-07-14 1990-07-06 Verfahren zur steuerung einer brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0482048A1 EP0482048A1 (de) 1992-04-29
EP0482048B1 true EP0482048B1 (de) 1995-04-19

Family

ID=8201625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90910722A Revoked EP0482048B1 (de) 1989-07-14 1990-07-06 Verfahren zur steuerung einer brennkraftmaschine

Country Status (7)

Country Link
US (1) US5226395A (cs)
EP (1) EP0482048B1 (cs)
JP (1) JPH04506692A (cs)
CS (1) CS346490A2 (cs)
DE (1) DE59008945D1 (cs)
ES (1) ES2071104T3 (cs)
WO (1) WO1991001442A1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636451B4 (de) * 1996-09-07 2010-06-10 Robert Bosch Gmbh Einrichtung zum Steuern der einer Brennkraftmaschine zuzuführenden Kraftstoffmenge

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2755018B2 (ja) * 1992-02-28 1998-05-20 三菱自動車工業株式会社 吸排気弁停止機構付きエンジンの吸気量算出装置
AT510912B1 (de) * 2012-03-06 2016-03-15 Avl List Gmbh Verfahren zur Emissionsoptimierung von Verbrennungskraftmaschinen
DE102018207465B4 (de) * 2018-05-15 2025-07-10 Volkswagen Aktiengesellschaft Verfahren zur Berechnung einer Frischluftmasse in einem Zylinder und Steuerung

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964443A (en) * 1973-05-25 1976-06-22 The Bendix Corporation Digital engine control system using DDA schedule generators
JPS55131535A (en) * 1979-04-02 1980-10-13 Honda Motor Co Ltd Engine controller
JPS5888435A (ja) * 1981-11-19 1983-05-26 Honda Motor Co Ltd 吸気温度による補正機能を有する内燃エンジンの空燃比補正装置
JPS5888436A (ja) * 1981-11-19 1983-05-26 Honda Motor Co Ltd 吸気温度による補正機能を有する内燃エンジンの空燃比補正装置
JPS58162732A (ja) * 1982-03-23 1983-09-27 Toyota Motor Corp 内燃機関の燃料供給量制御方法
JPS6131646A (ja) * 1984-07-25 1986-02-14 Hitachi Ltd 内燃機関制御装置
JPS61212639A (ja) * 1985-03-18 1986-09-20 Honda Motor Co Ltd 内燃エンジンの冷間時の燃料供給制御方法
JPH0665858B2 (ja) * 1986-05-02 1994-08-24 トヨタ自動車株式会社 内燃機関の空燃比制御方法
DE3714245A1 (de) * 1986-05-10 1987-11-12 Volkswagen Ag Regeleinrichtung
FR2605050B1 (fr) * 1986-10-14 1991-01-11 Renault Procede de correction de la richesse d'un melange air-carburant admis dans un moteur a combustion interne, a injection electronique.
US4823755A (en) * 1987-01-27 1989-04-25 Toyota Jidosha Kabushiki Kaisha Fuel injection system for an internal combustion engine
DE68904437T4 (de) * 1988-01-29 1996-04-04 Hitachi Ltd Steuerung für Motor-Kraftstoffeinspritzung.
US4886027A (en) * 1988-07-29 1989-12-12 General Motors Corporation Fuel injection temperature compensation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636451B4 (de) * 1996-09-07 2010-06-10 Robert Bosch Gmbh Einrichtung zum Steuern der einer Brennkraftmaschine zuzuführenden Kraftstoffmenge

Also Published As

Publication number Publication date
ES2071104T3 (es) 1995-06-16
EP0482048A1 (de) 1992-04-29
WO1991001442A1 (de) 1991-02-07
CS346490A2 (en) 1991-12-17
DE59008945D1 (de) 1995-05-24
US5226395A (en) 1993-07-13
JPH04506692A (ja) 1992-11-19

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