EP1012462A1 - Method for determining an operation parameter for the starting of an internal combustion engine - Google Patents

Method for determining an operation parameter for the starting of an internal combustion engine

Info

Publication number
EP1012462A1
EP1012462A1 EP98951277A EP98951277A EP1012462A1 EP 1012462 A1 EP1012462 A1 EP 1012462A1 EP 98951277 A EP98951277 A EP 98951277A EP 98951277 A EP98951277 A EP 98951277A EP 1012462 A1 EP1012462 A1 EP 1012462A1
Authority
EP
European Patent Office
Prior art keywords
starting
speed
internal combustion
combustion engine
initialization 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
EP98951277A
Other languages
German (de)
French (fr)
Other versions
EP1012462B1 (en
Inventor
Achim Przymusinski
Andreas Hartke
Dirk Heinitz
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
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP1012462A1 publication Critical patent/EP1012462A1/en
Application granted granted Critical
Publication of EP1012462B1 publication Critical patent/EP1012462B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up

Definitions

  • the invention relates to a method for determining an operating parameter for starting an internal combustion engine, in particular for determining the fuel mass to be injected, according to the preamble of claim 1.
  • An internal combustion engine can be started without special regulation if the starting process is carried out with the aid of a starting function.
  • This function calculates depending on the operating parameters, e.g. the coolant temperature and the speed from several maps one or more parameters for the injection system with which the internal combustion engine is then started. If a certain idling speed is then reached, the system switches to speed control. Difficulties arise from the fact that the same starting behavior should be achieved with very different operating parameters.
  • the starting process using the start function is shown in FIG. 3.
  • the fuel mass m is injected during the time between t1 and t2 in accordance with the aforementioned function. From time t2, the speed controller takes over control of the internal combustion engine. This leads to a strong overshoot of the speed N during the starting process until the idle speed N_S0LL is finally reached.
  • the invention is therefore based on the object of improving the starting or starting behavior of an internal combustion engine.
  • the starting process takes place with a controller, in particular the speed or idling speed controller, which is present anyway and is initialized for the starting process with a parameter, in particular the fuel mass.
  • This parameter which is fed to the controller at the start of the starting process, is dependent on various operating parameters of the internal combustion engine and is stored in a characteristic curve as a function of the coolant temperature in the control unit of the internal combustion engine.
  • the engine is accelerated to idle speed with the aid of the controller. This results in better starting behavior and the problem of the transient response to the idling speed, as occurs when using the starting function, does not occur.
  • a particular advantage is that the starting process is carried out with the aid of the speed controller, which is already provided in the control unit and thus has an extended area of application.
  • FIG. 1 is a block diagram of a speed controller
  • Figure 2 shows the course of the injected fuel mass and the speed according to the inventive method
  • Fig. 3 shows the course of the injected fuel mass and the speed when a start function is specified
  • a speed controller 1 which calculates a fuel mass m (manipulated variable) from a difference DIFF between a target speed N_SOLL and the actual speed N.
  • An injection valve (not shown) is actuated with this output signal from controller 1.
  • controller 1 is initialized with a fuel mass I.
  • the parameter I is preferably taken from a characteristic curve as a function of the coolant temperature. This parameter determines the fuel mass for the first injection that takes place at the start of the starting process.

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)

Abstract

The invention relates to a method for starting an internal combustion engine with the assistance of a speed governor (1) which contains an initialization value (I) for the fuel mass (m) to be injected, said fuel line being derived from a characteristic line. Starting from the initialization value (I), the acceleration up to the idle-running speed (N_SOLL) results with the aid of the speed governor (1).

Description

Beschreibungdescription
Verfahren zum Bestimmen eines Betriebsparameters für den Start einer BrennkraftmaschineMethod for determining an operating parameter for starting an internal combustion engine
Die Erfindung betrifft ein Verfahren zum Bestimmen eines Betriebsparameters für den Start einer Brennkraftmaschine, insbesondere zum Bestimmen der einzuspritzenden Kraftstoffmasse, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for determining an operating parameter for starting an internal combustion engine, in particular for determining the fuel mass to be injected, according to the preamble of claim 1.
Eine Brennkraftmaschine kann ohne besondere Regelung gestartet werden, wenn der Startvorgang mit Hilfe einer Startfunk- tion durchgeführt wird. Diese Funktion berechnet in Abhängigkeit der Betriebsparameter, z.B. der Kühlmitteltemperatur und der Drehzahl aus mehreren Kennfeldern einen oder mehrere Parameter für das Einspritzsystem, mit denen dann die Brennkraftmaschine gestartet wird. Ist dann eine bestimmte Leerlaufdrehzahl erreicht, so wird auf die Drehzahlregelung umgeschaltet. Schwierigkeiten ergeben sich daraus, daß das glei- ehe Startverhalten bei sehr unterschiedlichen Betriebsparametern erzielt werden soll.An internal combustion engine can be started without special regulation if the starting process is carried out with the aid of a starting function. This function calculates depending on the operating parameters, e.g. the coolant temperature and the speed from several maps one or more parameters for the injection system with which the internal combustion engine is then started. If a certain idling speed is then reached, the system switches to speed control. Difficulties arise from the fact that the same starting behavior should be achieved with very different operating parameters.
Der Startvorgang mit Hilfe der Startfunktion ist in Fig. 3 dargestellt . Sobald die Drehzahl der Brennkraftmaschine mit Hilfe des Anlassers die Drehzahl Nsτ erreicht hat, folgt die Einspritzung der Kraftstoffmasse m während der Zeit zwischen tl und t2 entsprechend der vorgenannten Funktion. Ab dem Zeitpunkt t2 übernimmt der Drehzahlregler die Regelung der Brennkraftmaschine . Dies führt zu einem starken Überschwingen der Drehzahl N beim Startvorgang, bis endlich die Leerlauf- drehzahl N_S0LL erreicht ist . Bei der Vorgabe dieser Funktion müssen, um ein Überschwingen zu vermeiden und eine Reproduzierbarkeit der Startvorgänge ' zu erhalten, alle Quereinflüsse in der Startfunktion berücksichtigt werden, da es sich bei der Funktion um eine Steuerung handelt Ferner ist ein rechnergesteuertes Einspritzsystem für Dieselmotoren bekannt (DE 30 09 627 C2) , wobei die Steuerung der Anlaßventile beim Anlaßbeginn und der Auslösewinkel für den Einspritzvorgang abhängig vom Kurbelwellenwinkel mit einem besonderen Programm berechnet wird.The starting process using the start function is shown in FIG. 3. As soon as the speed of the internal combustion engine has reached the speed N sτ with the aid of the starter, the fuel mass m is injected during the time between t1 and t2 in accordance with the aforementioned function. From time t2, the speed controller takes over control of the internal combustion engine. This leads to a strong overshoot of the speed N during the starting process until the idle speed N_S0LL is finally reached. When specifying this function, in order to avoid overshoot and to maintain reproducibility of the start processes, all cross influences in the start function must be taken into account, since the function is a control Furthermore, a computer-controlled injection system for diesel engines is known (DE 30 09 627 C2), the control of the starting valves at the start of starting and the trigger angle for the injection process being calculated depending on the crankshaft angle using a special program.
Somit liegt der Erfindung die Aufgabe zugrunde, das Start- bzw. Anlaßverhalten einer Brennkraftmaschine zu verbessern.The invention is therefore based on the object of improving the starting or starting behavior of an internal combustion engine.
Die genannte Aufgabe wird mit den Merkmalen des Patentanspruchs 1 gelöst . Vorteilhafte Weiterbildungen sind in den Unteransprüchen gekennzeichnet .The stated object is achieved with the features of patent claim 1. Advantageous further developments are characterized in the subclaims.
Erfindungsgemäß erfolgt der Startvorgang mit einem Regler, insbesondere dem ohnehin vorhandenen Drehzahl- bzw. Leerlauf- regier, der für den Startvorgang mit einem Parameter, insbesondere der Kraftstoffmasse, initialisiert wird. Dieser Parameter, der zu Beginn des Startvorgangs dem Regler zugeführt wird, ist von verschiedenen Betriebsparametern der Brenn- kraftmaschine abhängig und ist in einer Kennlinie in Abhängigkeit von der Kühlmitteltemperatur im Steuergerät der Brennkraftmaschine abgespeichert. Nach Vorgabe der Initialisierung erfolgt dann die Beschleunigung der Brennkraftmaschine auf Leerlaufdrehzahl mit Hilfe des Reglers . Dadurch ergibt sich ein besseres Startverhalten und das Problem des Einschwingvorganges auf die Leerlaufdrehzahl , wie es sich bei Anwendung der Startfunktion stellt, tritt nicht auf. Ein besonderer Vorteil liegt darin, daß der Startvorgang mit Hilfe des Drehzahlreglers erfolgt, der ohnehin im Steuergerät vor- gesehen ist und damit einen erweiterten Anwendungsbereich erhält.According to the invention, the starting process takes place with a controller, in particular the speed or idling speed controller, which is present anyway and is initialized for the starting process with a parameter, in particular the fuel mass. This parameter, which is fed to the controller at the start of the starting process, is dependent on various operating parameters of the internal combustion engine and is stored in a characteristic curve as a function of the coolant temperature in the control unit of the internal combustion engine. After the initialization has been specified, the engine is accelerated to idle speed with the aid of the controller. This results in better starting behavior and the problem of the transient response to the idling speed, as occurs when using the starting function, does not occur. A particular advantage is that the starting process is carried out with the aid of the speed controller, which is already provided in the control unit and thus has an extended area of application.
Ein Ausführungsbeispiel der Erfindung ist nachstehend anhand der Zeichnung näher erläutert . Es zeigt :An embodiment of the invention is explained below with reference to the drawing. It shows :
Fig. 1 ein Blockschaltbild eines Drehzahlreglers, Fig. 2 den Verlauf von eingespritzter Kraftstoffmasse und der Drehzahl nach dem erfindungsgemäßen Verfahren; Fig. 3 den Verlauf von eingespritzer Kraftstoffmasse und der Drehzahl bei Vorgabe einer Startfunktion1 is a block diagram of a speed controller, Figure 2 shows the course of the injected fuel mass and the speed according to the inventive method. Fig. 3 shows the course of the injected fuel mass and the speed when a start function is specified
In Fig. 1 ist ein Drehzahlregler 1 dargestellt, der aus einer Differenz DIFF zwischen einer Solldrehzahl N_SOLL und der Istdrehzahl N eine Kraftstoffmasse m (Stellgröße) berechnet. Mit diesem Ausgangssignal des Reglers 1 wird ein nicht darge- stelltes Einspritzventil angesteuert.1 shows a speed controller 1 which calculates a fuel mass m (manipulated variable) from a difference DIFF between a target speed N_SOLL and the actual speed N. An injection valve (not shown) is actuated with this output signal from controller 1.
Für den Start wird der Regler 1 mit einer Kraftstoffmasse I initialisiert. Der Parameter I wird vorzugsweise aus einer Kennlinie in Abhängigkeit von der Kühlmitteltemperatur ent- nommen. Dieser Parameter bestimmt die Kraftstoffmasse für die erste Einspritzung, die zu Beginn des Startvorgangs erfolgt.For the start, controller 1 is initialized with a fuel mass I. The parameter I is preferably taken from a characteristic curve as a function of the coolant temperature. This parameter determines the fuel mass for the first injection that takes place at the start of the starting process.
Fig. 2 zeigt den zeitlichen Verlauf der eingespritzten Kraft- stoffmasse m. Ist eine bestimmte Anlasserdrehzahl Nsτ er- reicht, so erfolgt die erste durch die Initialisierung I vorbestimmte Einspritzung, die Kurve m steigt steil an. Ausgehend von dem Initialisierungswert I wird dann vom Regler 1 die einzuspritzende Kraftstoffmasse berechnet, so daß sich die Drehzahl N an den Sollwert N_SOLL annähert ohne daß es zu den in Fig. 3 dargestellten Einschwingvorgängen kommt. Nach Fig. 2 ergibt sich über die Regelung ein besseres und reproduzierbares Startverhalten. Das Geräuschverhalten sowie die Abgasemission während des Startvorganges sind verbessert . Somit kann durch eine einfache Vorgabe des Initialisierungswer- tes I für den Drehzahlregler der Rechneraufwand für den Startvorgang wesentlich verringert werden. 2 shows the time course of the injected fuel mass m. If a certain starter speed N sτ has been reached , the first injection predetermined by the initialization I takes place, and the curve m rises steeply. Starting from the initialization value I, the fuel mass to be injected is then calculated by the controller 1, so that the speed N approaches the setpoint N_SOLL without the transient events shown in FIG. 3 occurring. According to FIG. 2, the control results in a better and reproducible starting behavior. The noise behavior and the exhaust emission during the starting process are improved. Thus, by simply specifying the initialization value I for the speed controller, the computer effort for the starting process can be significantly reduced.

Claims

Patentansprüche claims
1. Verfahren zum Starten einer Brennkraftmaschine, bei dem dem Einspritzsystem ein von Kenngrößen bestimmter Betriebspa- rameter, insbesondere die einzuspritzende Kraftstoffmasse (m) zugeführt wird, dadurch gekennzeichnet, daß als Ausgangsgröße für den Start einem Drehzahlregler (1) ein Initialisierungswert (I) zugeführt wird und ausgehend von dem Initialisierungswert (I) von dem Drehzahlregler (1) die Drehzahl (N) auf die Leerlaufdrehzahl (N-SOLL) hochgeregelt wird.1. Method for starting an internal combustion engine, in which an operating parameter is supplied to the injection system by operating parameters determined by parameters, in particular the fuel mass (m) to be injected, characterized in that an initialization value (I) is fed to a speed controller (1) as the starting variable for the start is and based on the initialization value (I) by the speed controller (1), the speed (N) is increased to the idling speed (N-TARGET).
2. Verfahren nach Anspurch 1, dadurch gekennzeichnet, daß die Regelung durch den im Motorsteuergerät vorhandenen Drehzahlregler erfolgt.2. The method according to claim 1, characterized in that the regulation is carried out by the speed controller present in the engine control unit.
3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß der Initialisierungswert in einer Kennlinie in Abhängigkeit der Kühlmitteltemperatur abgespeichert ist.3. The method according to any one of claims 1 or 2, characterized in that the initialization value is stored in a characteristic curve as a function of the coolant temperature.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Initialisierungswert für den ersten Einspritzvorgang der Brennkraftmaschine gilt. 4. The method according to any one of claims 1 to 3, characterized in that the initialization value applies to the first injection process of the internal combustion engine.
EP98951277A 1997-09-12 1998-09-08 Method for determining an operation parameter for the starting of an internal combustion engine Expired - Lifetime EP1012462B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19740192 1997-09-12
DE19740192A DE19740192C2 (en) 1997-09-12 1997-09-12 Method for starting an internal combustion engine
PCT/DE1998/002656 WO1999014474A1 (en) 1997-09-12 1998-09-08 Method for determining an operation parameter for the starting of an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1012462A1 true EP1012462A1 (en) 2000-06-28
EP1012462B1 EP1012462B1 (en) 2001-07-18

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EP98951277A Expired - Lifetime EP1012462B1 (en) 1997-09-12 1998-09-08 Method for determining an operation parameter for the starting of an internal combustion engine

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EP (1) EP1012462B1 (en)
DE (2) DE19740192C2 (en)
WO (1) WO1999014474A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19939821B4 (en) * 1999-08-21 2009-08-20 Robert Bosch Gmbh Method and device for controlling the speed of an internal combustion engine
JP2002195075A (en) * 2000-12-26 2002-07-10 Isuzu Motors Ltd Starting control method of engine
DE102009008816B4 (en) 2009-02-13 2020-06-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for starting an internal combustion engine
SE541113C2 (en) * 2016-06-22 2019-04-09 Scania Cv Ab Method and system for controlling fuel injection in connection to engine start procedure

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JPS5578131A (en) * 1978-12-06 1980-06-12 Nissan Motor Co Ltd Fuel ejection control device
DE3009627A1 (en) * 1980-03-13 1981-09-24 Robert Bosch Gmbh, 7000 Stuttgart DEVICE FOR DETERMINING CONTROL AND CONTROL SIZES OF AN INTERNAL COMBUSTION ENGINE
US4582036A (en) * 1983-09-12 1986-04-15 Honda Giken Kogyo K.K. Fuel supply control method for internal combustion engines immediately after cranking
JPS623147A (en) * 1985-06-28 1987-01-09 Honda Motor Co Ltd Idle rotation controller for internal-combustion engine
JPH02104939A (en) * 1988-10-12 1990-04-17 Honda Motor Co Ltd Device for controlling idling engine speed of internal combustion engine
JPH0323329A (en) * 1989-06-20 1991-01-31 Kubota Corp Fuel feed control device
DE4037772A1 (en) * 1990-11-28 1992-06-04 Bosch Gmbh Robert METHOD AND DEVICE FOR IDLE CONTROL OF AN INTERNAL COMBUSTION ENGINE

Non-Patent Citations (1)

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Title
See references of WO9914474A1 *

Also Published As

Publication number Publication date
DE19740192C2 (en) 2000-03-16
DE59801051D1 (en) 2001-08-23
EP1012462B1 (en) 2001-07-18
DE19740192A1 (en) 1999-03-18
WO1999014474A1 (en) 1999-03-25

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