WO2001044643A2 - Procede pour determiner la temperature de l'huile moteur dans un moteur a combustion interne - Google Patents

Procede pour determiner la temperature de l'huile moteur dans un moteur a combustion interne Download PDF

Info

Publication number
WO2001044643A2
WO2001044643A2 PCT/DE2000/004093 DE0004093W WO0144643A2 WO 2001044643 A2 WO2001044643 A2 WO 2001044643A2 DE 0004093 W DE0004093 W DE 0004093W WO 0144643 A2 WO0144643 A2 WO 0144643A2
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
internal combustion
combustion engine
engine
toil
Prior art date
Application number
PCT/DE2000/004093
Other languages
German (de)
English (en)
Other versions
WO2001044643A3 (fr
Inventor
Ingo Knoch
Michael STÜRTZ
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2001044643A2 publication Critical patent/WO2001044643A2/fr
Publication of WO2001044643A3 publication Critical patent/WO2001044643A3/fr

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M2250/00—Measuring
    • F01M2250/64—Number of revolutions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M2250/00—Measuring
    • F01M2250/66—Vehicle speed
    • 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
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
    • 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
    • F02D2200/023—Temperature of lubricating oil or working fluid

Definitions

  • the invention relates to a method for determining the engine oil temperature in an internal combustion engine according to the preamble of claim 1.
  • the current temperature of the engine oil is required for certain functions in an electronic control device for internal combustion engines. For example, exceeding a threshold value for the engine oil temperature can be used as an activation condition for on-board diagnosis.
  • the engine oil temperature can serve as a criterion for setting the idle speed of the internal combustion engine. It is also possible to use the engine oil temperature for an oil life calculation to determine the time of an oil change. For these purposes it is known to measure the temperature of the engine oil by means of a temperature sensor and to process the signal of this temperature sensor accordingly.
  • the oil temperature is determined from other parameters. For this purpose, the period of time during which the coolant temperature is equal to or greater than a temperature threshold value is determined. A predetermined relationship between this period and the oil temperature determines a measure of the oil temperature and sets the idle speed accordingly.
  • AI proposes a method for setting the idle speed of an internal combustion engine, the idle speed being increased when the internal combustion engine is hot.
  • a hot internal combustion engine is present when the oil temperature exceeds a threshold value at which the oil pressure can become too low.
  • the exceeding of the oil temperature threshold is determined depending on the engine temperature, possibly the intake air temperature, the engine speed and the load of the internal combustion engine.
  • the invention is based on the object of specifying a method with which the engine oil temperature in an internal combustion engine can be determined with a high degree of accuracy, without an engine oil temperature sensor.
  • the idea on which the invention is based is based on the engine oil temperature using measured or calculated values of operating parameters of the internal combustion engine, such as temperature of the cooling liquid, temperature of the intake air, speed, driving speed, air mass flow, ambient temperature, which are required anyway for regulating and controlling the internal combustion engine, to calculate.
  • the implementation takes place via temperature gradients of heating and cooling, the temperature gradients canceling themselves when the stationary final temperature is reached.
  • the calculation of the engine oil temperature is therefore based on heat transfers between the media coolant, engine oil and ambient air.
  • Figure 1 is a schematic representation of an internal combustion engine in which the inventive method is applied and
  • FIG. 2 shows a block diagram for determining the engine temperature
  • FIG. 1 shows an internal combustion engine with its associated control device in a very simplified manner, only the few parts being shown which are necessary for the understanding of the invention. In particular, the exhaust gas aftertreatment system and the fuel circuit have not been shown.
  • the internal combustion engine 1 is supplied with the air required for combustion via an intake line 2.
  • An injection system which injects fuel into the intake line 2 is identified by the reference number 3.
  • the method according to the invention can also be used in an internal combustion engine with direct fuel injection, which has, for example, a high-pressure accumulator injection system (common rail) with injection valves, which inject the fuel directly into the cylinders of the internal combustion engine 1.
  • the exhaust gas from the internal combustion engine 1 flows via an exhaust gas line 4 to an exhaust gas aftertreatment system and from there via a silencer ms Freie (not shown).
  • a load sensor in the form of an air mass meter 5 is provided in the intake duct 2 and emits a signal MAF corresponding to the air mass flow.
  • a pressure sensor 6 can also be used as the load sensor for the internal combustion engine 1, which pressure sensor 6 prevails in the intake line 2 Pressure (intake manifold pressure) ps recorded (shown in Figure 1 in a dashed line).
  • An electronic control device 7 is provided for controlling and regulating the internal combustion engine 1.
  • Such electronic control devices which as a rule contain a microcomputer and take on a multitude of other control and regulating tasks in addition to the ignition control and fuel injection, are known per se, so that in the following only the structure relevant to the invention and its structure Function is entered.
  • the control device 7 is supplied with the signals from a wide variety of sensors for further processing.
  • a speed sensor 8 for the speed N a sensor 9 for the temperature TCO of the coolant of the internal combustion engine 1, a sensor 10 for the temperature TIA of the intake air and a sensor 11 for the speed VS of the vehicle are provided.
  • the control device 7 is also connected to further sensors and actuators of the internal combustion engine 1 via a data and control line 12 which is only shown schematically
  • a control device 7 is assigned to the control device 7, in which various characteristic maps KF1 to KF6 are stored and the meaning of which will be explained in more detail later with reference to the description of FIG.
  • FIG. 2 shows in the form of a block diagram how the engine oil temperature can be determined from various operating variables of the internal combustion engine, such as temperature of the cooling liquid, air mass flow, speed and other parameters such as driving speed, temperature values for intake air and the environment, and temperature gradients of the heating or cooling.
  • operating variables of the internal combustion engine such as temperature of the cooling liquid, air mass flow, speed and other parameters such as driving speed, temperature values for intake air and the environment, and temperature gradients of the heating or cooling.
  • the control device 7 Immediately after the start of the internal combustion engine 1, the control device 7 has no information about the value the engine oil temperature TOIL is present. An initialization value for the engine oil temperature TOIL must therefore be determined. After “ignition ON” (the operating voltage of the vehicle is at terminal 15), the switch contact of a changeover device US is in the position shown by the dashed line (position I).
  • the temperature value for the cooling liquid TCO measured at the start of the internal combustion engine 1 by means of the sensor 9 and the temperature value for the intake air temperature TIA measured by means of the sensor 10 are input variables of a map KF1. Depending on these input variables, the initialization value for the engine oil temperature TOIL in ° C. is read from the map KF1 and stored in the memory device 31.
  • the routine calculation of the current engine oil temperature TOIL (n) begins based on the previous value of the engine oil temperature TOIL (n-l).
  • the switch contact of the switchover device US is in the switch position II. This means that the value for the engine oil temperature TOIL can be continuously updated in time-predetermined intervals, for example in a second grid.
  • the current value of the cooling fluid temperature TCO and the current value of the engine oil temperature TOIL, - when the method is called up for the first time equal to the initialization value - are fed to a first summing device AD1.
  • This difference TCO-TOIL is the input variable of a map KF2 in which, depending on the difference, values m ° K / sec for the heat transfer of the two media motor and cooling fluid are stored. Since the difference can be positive, negative or zero, the map KF2 contains a negative and a positive branch. If the temperature of the coolant TCO is higher than the temperature of the motor oil TOIL, the gradient is positive and the coolant warms the motor oil. Is the temperature of the Cooling liquid TCO below the temperature of the motor oil TOIL, the gradient is negative and the motor oil warms up the cooling liquid.
  • the output variable of the map KF2 is fed to a second summation device AD2.
  • a value for the ambient temperature TAM calculated from the intake air temperature TIA, for example, or a value for the ambient temperature TAM and the current value for the engine oil temperature TOIL detected by a temperature sensor are fed to a summation device AD3.
  • the difference between the engine oil temperature TOIL and the ambient temperature TAM is formed there and, like the value for the driving speed VS of the vehicle detected by the sensor 11, serves as the input variable for a map KF3.
  • This map KF3 characterizes the heat transfer from the engine oil to the oil pan of the vehicle.
  • the engine oil emits heat to the oil pan, so that the output value of the map KF3, printed out in ° K / sec, is always negative due to the cooling taking place.
  • the output value of the map KF3, like the output value of the map KF2, is fed to the summation device AD2.
  • the speed N of the internal combustion engine 1, which is detected by means of the speed sensor 8, and the air mass flow MAF, which is detected by means of the air mass meter 5, are input variables of a further map KF4.
  • the air mass flow MAF can also be calculated using a known model from other parameters of the internal combustion engine 1, for example from the throttle valve opening angle or the pressure in the intake line 2. With the map KF4, the load point-dependent temperature flow into the motor oil TOIL is taken into account, which occurs due to the combustion process in the cylinder (friction and combustion heat over the cylinder walls).
  • the intake manifold pressure ps detected by the pressure sensor 6 can also be used as an input variable for the map KF4 can be used (dashed line in FIG. 2).
  • the output value of the map KF, specified in ° K / sec, is fed to a multiplication device MU1.
  • the current value of the engine oil temperature TOIL is also the input variable of a map KF5, which represents the relationship between the change in the heat capacity of the engine oil as a function of the engine oil temperature.
  • the influence of the air ratio ⁇ can also be taken into account, as is shown in FIG Representation is shown.
  • the factor read out like the output value of the map KF4, is fed to the multiplication device MU1.
  • the maps KF1-KF6 are determined experimentally on the test bench by tests.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

Selon l'invention, la température de l'huile moteur (TOIL) est déterminée par formation d'un modèle, les grandeurs d'entrée utilisées pour le modèle étant au moins un paramètre (TCO, N, MAF) caractérisant le point de fonctionnement du moteur à combustion interne et au moins un paramètre (TIA, TAM, VS) représentant les conditions ambiantes du moteur à combustion interne et/ou du véhicule automobile. Le modèle prend en compte des variations de température dynamiques par l'intermédiaire de gradients des températures, sur la base de transferts thermiques aussi bien entre des parties du moteur à combustion interne qu'entre le moteur à combustion interne et son environnement.
PCT/DE2000/004093 1999-12-17 2000-11-21 Procede pour determiner la temperature de l'huile moteur dans un moteur a combustion interne WO2001044643A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19961118.1 1999-12-17
DE1999161118 DE19961118A1 (de) 1999-12-17 1999-12-17 Verfahren zum Bestimmen der Motoröltemperatur in einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
WO2001044643A2 true WO2001044643A2 (fr) 2001-06-21
WO2001044643A3 WO2001044643A3 (fr) 2001-12-27

Family

ID=7933179

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/004093 WO2001044643A2 (fr) 1999-12-17 2000-11-21 Procede pour determiner la temperature de l'huile moteur dans un moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE19961118A1 (fr)
WO (1) WO2001044643A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10119786A1 (de) 2001-04-23 2002-10-31 Siemens Ag Verfahren zum Bestimmen der Öltemperatur in einer Brennkraftmaschine
DE10307342B4 (de) * 2003-02-21 2005-08-11 Volkswagen Ag Vorrichtung und Verfahren zur modellbasierten On-Board-Diagnose
FR2851784B1 (fr) * 2003-02-27 2005-05-27 Peugeot Citroen Automobiles Sa Procede et systeme d'evaluation de la temperature de l'huile d'un moteur a combustion
FR2996253B1 (fr) * 2012-10-01 2014-10-10 Peugeot Citroen Automobiles Sa Dispositif de calcul d'un modele de temperature d'huile pour un moteur thermique equipe d'un rechauffeur additionnel
DE102016222044B3 (de) 2016-11-10 2018-05-30 Continental Automotive Gmbh Verfahren und Vorrichtung zum Ermitteln der Öltemperatur in einer Brennkraftmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4016099C2 (fr) 1989-05-18 1992-11-26 Fuji Jukogyo K.K., Tokio/Tokyo, Jp
DE4433299A1 (de) 1994-09-19 1996-03-21 Bosch Gmbh Robert Verfahren und Vorrichtung zur Leerlaufeinstellung einer Brennkraftmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU9131791A (en) * 1991-12-19 1993-07-19 Caterpillar Inc. Method for diagnosing an engine using computer based models
DE4401835B4 (de) * 1993-02-02 2005-12-08 Volkswagen Ag Vorrichtung zur Ermittlung des Ölwechselzeitpunktes eines Kraftfahrzeugmotors
US5633796A (en) * 1994-12-12 1997-05-27 Ford Motor Company Method and apparatus for inferring engine oil temperature for use with an oil change indicator
US5646341A (en) * 1995-07-28 1997-07-08 Caterpillar Inc. Apparatus and method for diagnosing an engine using an oil pressure model

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4016099C2 (fr) 1989-05-18 1992-11-26 Fuji Jukogyo K.K., Tokio/Tokyo, Jp
DE4433299A1 (de) 1994-09-19 1996-03-21 Bosch Gmbh Robert Verfahren und Vorrichtung zur Leerlaufeinstellung einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE19961118A1 (de) 2001-07-05
WO2001044643A3 (fr) 2001-12-27

Similar Documents

Publication Publication Date Title
EP1716330B1 (fr) Procede de compensation d'ecarts de quantites d'injection entre les cylindres d'un moteur a combustion interne
DE102006026390B4 (de) Elektronische Steuereinrichtung zur Steuerung der Brennkraftmaschine in einem Kraftfahrzeug
DE3874585T2 (de) Verfahren zur vorausberechnung der parameter zur steuerung der kraftstoffzufuhr fuer eine brennkraftmaschine.
DE3408223C2 (fr)
EP1716331B1 (fr) Procede de synchronisation des cylindres en termes de quantites d'injection de carburant dans un moteur thermique
DE102007012604B4 (de) Verfahren zum Regeln einer Einspritzung eines Injektors einer direkteinspritzenden Verbrennungskraftmaschine und direkteinspritzende Verbrennungskraftmaschine
DE102006044073B4 (de) Verwendung einer elektronischen Steuereinrichtung zur Steuerung der Brennkraftmaschine in einem Kraftfahrzeug
DE4100397C2 (de) Verfahren und Anordnung zur Überwachung des Konvertierungsgrads eines Katalysators
DE102006004516B3 (de) Bayes-Netz zur Steuerung und Regelung einer Brennkraftmaschine
DE10330112A1 (de) Vorrichtung und Verfahren zum Steuern/Regeln eines Kraftstoff/Luftverhältnisses für eine Brennkraftmaschine
DE102018213114A1 (de) Verfahren und Vorrichtung zum Betreiben eines Verbrennungsmotors mit einem Common-Rail-Einspritzsystem
DE19706750A1 (de) Verfahren zur Gemischsteuerung bei einem Verbrennungsmotor sowie Vorrichtung zu dessen Durchführung
DE102006048227B4 (de) Verfahren und Vorrichtung zur Ermittlung einer Betriebscharakteristik eines Einspritzsystems sowie ein entsprechend ausgerüsteter Verbrennungsmotor
DE19706126A1 (de) Verfahren zur Regelung einer Brennkraftmaschine im Bereich der Magergrenze
DE102019213092A1 (de) Verfahren zur Diagnostik von Verbrennungsaussetzern einer Verbrennungskraftmaschine
EP1381760B1 (fr) Procede de determination de la temperature d'huile dans un moteur a combustion interne
EP1269010A1 (fr) Procede et dispositif pour demarrer un moteur a combustion interne
WO2001044643A2 (fr) Procede pour determiner la temperature de l'huile moteur dans un moteur a combustion interne
DE3248745A1 (de) Regelsystem fuer eine brennkraftmaschine
DE102007034337A1 (de) Verfahren zur Bestimmung der eingespritzten Kraftstoffmenge
DE102008005154A1 (de) Verfahren und Vorrichtung zur Überwachung einer Motorsteuereinheit
EP0349811B1 (fr) Système de régulation d'un moteur à combustion
DE102006061683A1 (de) Verfahren zur Bestimmung der eingespritzten Kraftstoffmenge
DE102008027151A1 (de) Verfahren zur Steuerung eines Verbrennungsmotors mit einem temperaturabhängigen Einspritzparameter
DE19624343A1 (de) Leerlaufregelung in Abhängigkeit von elektrischen Verbrauchern

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): BR JP KR MX US

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): BR JP KR MX US

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR