EP0482048A1 - Procede pour la commande d'un moteur a combustion interne. - Google Patents

Procede pour la commande d'un moteur a combustion interne.

Info

Publication number
EP0482048A1
EP0482048A1 EP90910722A EP90910722A EP0482048A1 EP 0482048 A1 EP0482048 A1 EP 0482048A1 EP 90910722 A EP90910722 A EP 90910722A EP 90910722 A EP90910722 A EP 90910722A EP 0482048 A1 EP0482048 A1 EP 0482048A1
Authority
EP
European Patent Office
Prior art keywords
temperature
map
intake air
combustion engine
fuel
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
EP90910722A
Other languages
German (de)
English (en)
Other versions
EP0482048B1 (fr
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
Family has litigation
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(A1) "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/fr
Application granted granted Critical
Publication of EP0482048B1 publication Critical patent/EP0482048B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

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 based on the knowledge that one of the main causes of the deviation of the actually injected fuel mass from the optimum value can be attributed to the heating of the intake air mass in the intake tract, depending on the operating point. Accordingly, in the invention, the fuel base value taken from the base map is corrected with a quotient whose denominator contains a temperature value that is read from a temperature map depending on a variable dependent on the air mass flow and on a heating temperature.
  • 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. For example, the temperature at a repre- sentative point of the intake tract can be queried. However, it proves to be particularly simple to use the difference between the cooling water temperature, which is recorded anyway, and the intake air temperature as the heating temperature.
  • 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
  • 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, generally in accordance with the stoichiometric mixture ratio between fuel and air, results in:
  • the fuel base value obtained in this way is then entered in the base map.
  • the fuel mass actually injected deviates from this basic fuel value in accordance with the correction according to the invention.
  • FIG. 1 is a block diagram for the injection system
  • FIG. 2 shows a flow chart for carrying out the method.
  • 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 as input variables to a control unit 2. 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.
  • step S2 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 the speed n serve as input parameters.
  • the basic injection times tB are then calculated from the injection time t multiplied by the quotient from a respective corrected intake air temperature TALK associated with the load and the intake air temperature TALa selected for the design conditions.
  • the calculation values required for the corrected intake air temperature TALK are determined experimentally and by calculation. For this purpose, the various loads and
  • VZ is the cylinder volume and R is the gas constant.
  • 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 from the correction map likewise stored in a read-only memory of the control device 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. For this purpose, similarly to the method previously described for the design conditions, the values for the corrected intake air temperature TALK are determined at different temperature differences TD. 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 from 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)

Abstract

La masse d'air aspirée est fonction de la température de l'air dans le cylindre et, par conséquent, du réchauffement intervenant dans la zone d'aspiration; cette erreur des définitions des réseaux de caractéristiques connus, fonction de la pression et de la vitesse de rotation, est corrigée par l'invention. A cet effet, la valeur de base du carburant, empruntée à un champ caractéristique de base, est multipliée par un facteur dont le dénominateur renferme une température de correction qui est déterminante pour le réchauffement de l'air d'aspiration dans la zone d'aspiration, fonction de sa température et du flux de masse d'air, et qui est empruntée à un champ caractéristique de température correspondant.
EP90910722A 1989-07-14 1990-07-06 Procede pour la commande d'un moteur a combustion interne Revoked EP0482048B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP89112980 1989-07-14
EP89112980 1989-07-14
PCT/EP1990/001098 WO1991001442A1 (fr) 1989-07-14 1990-07-06 Procede pour la commande d'un moteur a combustion interne

Publications (2)

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

Family

ID=8201625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90910722A Revoked EP0482048B1 (fr) 1989-07-14 1990-07-06 Procede pour la commande d'un moteur a combustion interne

Country Status (7)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983867A (en) * 1996-09-07 1999-11-16 Robert Bosch Gmbh Device and method for controlling the amount of fuel supplied to an internal combustion engine

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
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
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
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
EP0326065B2 (fr) * 1988-01-29 1995-12-20 Hitachi, Ltd. Commande d'injection de carburant pour moteur
US4886027A (en) * 1988-07-29 1989-12-12 General Motors Corporation Fuel injection temperature compensation system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9101442A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983867A (en) * 1996-09-07 1999-11-16 Robert Bosch Gmbh Device and method for controlling the amount of fuel supplied to an internal combustion engine

Also Published As

Publication number Publication date
ES2071104T3 (es) 1995-06-16
WO1991001442A1 (fr) 1991-02-07
EP0482048B1 (fr) 1995-04-19
DE59008945D1 (de) 1995-05-24
US5226395A (en) 1993-07-13
CS346490A2 (en) 1991-12-17
JPH04506692A (ja) 1992-11-19

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