DE3011107A1 - IC engine operational control - uses peak combustion pressure in cylinder as control parameter during cold starting - Google Patents

IC engine operational control - uses peak combustion pressure in cylinder as control parameter during cold starting

Info

Publication number
DE3011107A1
DE3011107A1 DE19803011107 DE3011107A DE3011107A1 DE 3011107 A1 DE3011107 A1 DE 3011107A1 DE 19803011107 DE19803011107 DE 19803011107 DE 3011107 A DE3011107 A DE 3011107A DE 3011107 A1 DE3011107 A1 DE 3011107A1
Authority
DE
Germany
Prior art keywords
internal combustion
combustion engine
combustion pressure
cold starting
cylinder
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Withdrawn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
DE19803011107
Other languages
German (de)
Inventor
Dusan Dipl.-Ing. 7257 Ditzingen Gruden
Paul-Friedrich Dipl.-Ing. 7135 Wiernsheim Küper
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Priority to DE19803011107 priority Critical patent/DE3011107A1/en
Publication of DE3011107A1 publication Critical patent/DE3011107A1/en
Withdrawn legal-status Critical Current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
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
    • 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
    • F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/155—Analogue data processing
    • F02P5/1558—Analogue data processing with special measures for starting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

An internal combustion engine is controlled during the cold starting period by measuring the peak combustion pressure in the cylinders. This parameter is used to control the mixture strength, ignition timing and exhaust gas recirculation rate. The method gives improved control over the engine working cycle during the warm-up period. Reduced exhaust gas emission and lower fuel consumption is obtained.

Description

U 94U 94

Verfahren zur RegelungProcedure for regulation

des Betriebsverhaltens einer Brennkraftmaschine in der Kaltstart- und Warmlaufphase.the operating behavior of an internal combustion engine in the cold start and warm-up phase.

Die Erfindung bezieht sich auf ein Verfahren zur Regelung des Betriebsverhaltens einer Brennkraftmaschine in der Kaltstart- und Warmlaufphase durch Änderung des Kraftstoff-Luft-Gemisches und des ZundZeitpunktes.The invention relates to a method for regulating the operating behavior of an internal combustion engine in the Cold start and warm-up phase by changing the fuel-air mixture and the ignition time.

Infolge verschärfter Abgas-Bestimmungen und aufgrund der allgemeinen Treibstoffknappheit wird nach Lösungen gesucht, bei denen Brennkraftmaschinen im gesamten Betriebskennfeld derart betrieben werden können, daß die schädlichen Anteile des Abgases und der Kraftstoffverbrauch auf ein Minimum reduziert werden.As a result of stricter emissions regulations and due to the general shortage of fuel, solutions are being sought in which internal combustion engines can be operated in the entire operating map in such a way that the harmful components of the Exhaust gas and fuel consumption are reduced to a minimum.

Eine solche Lösung ist durch ein Verfahren gegeben, welches es ermöglicht, eine Brennkraftmaschine mit einem möglichst mageren Kraftstoff-Luft-Gemisch zu betreiben, so daß diese in einem Bereich mit einem relativ schadstoffarmen Abgas und einem geringen Kraftstoffverbrauch arbeitet. Dazu ist es von Bedeutung, den gewünschten Betriebspunkt der mageren Laufgrenze der Brennkraftmaschine möglichst genau festzustellen und einzuregeln. Bei dem bekannten Verfahren zur Regelung des Betriebsverfahrens einer Brennkraftmaschine in einem vorgegebenen Betriebsbereich werden in Abhängigkeit von Streuungen der zyklischen Schwankungen des Brennraummittel druckes in drehzahlsynchronen Zeitintervallen die Verhältnisanteile des der Brennkraftmaschine zugeführten Kraftstoff-Luft-Gemisches und/oder die Menge von rückgeführtem Abgas verändert (DE-OS 24 34 743).Such a solution is given by a method which makes it possible to use an internal combustion engine with a operate a lean fuel-air mixture, so that this is in an area with a relatively low-pollutant exhaust gas and low fuel consumption. To do this, it is important to set the desired operating point of the lean Determine and regulate the running limit of the internal combustion engine as precisely as possible. In the known method for Control of the operating method of an internal combustion engine in a predetermined operating range are dependent of scatter of the cyclical fluctuations in the combustion chamber mean pressure in speed-synchronous time intervals Proportional proportions of the fuel-air mixture supplied to the internal combustion engine and / or the amount of recirculated Exhaust gas changed (DE-OS 24 34 743).

Eine weitere, bei einer Brennkraftmaschine den jeweiligen Betriebsbedingungen anzupassende und zu verändernde Variable stellt der Zündzeitpunkt dar, der bei diesem Verfahren jedoch unberücksichtigt bleibt.Another, in the case of an internal combustion engine, is to be adapted and changed to the respective operating conditions The variable represents the ignition point, which, however, is not taken into account in this method.

130 0 4 0/0353130 0 4 0/0353

3 U 943 U 94

Durch die DE-OS 25 10 526 ist auch bereits ein Verfahren zur Regelung des Betriebsverhaltens einer Brennkraftmaschine in einem vorgegebenen Betriebsbereich bekannt, bei dem in Abhängigkeit von Streuungen der zyklischen Schwankungen des Brennraummitteldruckes in drehzahlsynchronen Zeitintervallen die Verhältnisanteile des der Brennkraftmaschine zugeführten Kraftstoff-Luft-Gemisches und/oder die Menge von rückgeführtem Abgas der Brennkraftmaschine verändert werden und wobei zusätzlich auch der Zündzeitpunkt zur Änderung des Kraftstoff-Luft-Gemisches verändert wird. Diese Zündzeitpunktverstellung erfolgt dadurch, daß drehzahlsynchron Schwankungen der Kurbelwellenumdrehungsgeschwindigkeit als Maß für die Laufunruhe der Brennkraftmaschine erfasst und mit einem Sollwert verglichen werden, der gegebenenfalls auch durch die Simulation eines einen gleichförmigen Lauf der Brennkraftmaschine charakterisierenden elektrischen Signals gebildet wird und daß das so gewonnene Stellsignal zur Verstellung des Zündwinkels verwendet wird. Bei diesem Verfahren und dem Verfahren der DE-OS 24 34 74 3 werden jedoch die Kaltstart- und Warmlaufphase der Brennkraftmaschine nicht gesondert berücksichtigt.DE-OS 25 10 526 already provides a method for regulating the operating behavior of an internal combustion engine Known in a predetermined operating range, in which depending on the spread of the cyclical fluctuations of the combustion chamber mean pressure in speed-synchronous time intervals the proportions of the internal combustion engine supplied fuel-air mixture and / or the Amount of recirculated exhaust gas from the internal combustion engine can be changed and, in addition, the ignition point to change the fuel-air mixture. This ignition timing adjustment takes place in that fluctuations in the speed of rotation of the crankshaft are synchronized with the speed recorded as a measure of the uneven running of the internal combustion engine and compared with a target value, which may be also by simulating an electrical signal that characterizes uniform running of the internal combustion engine is formed and that the control signal obtained in this way is used to adjust the ignition angle. In this procedure and the method of DE-OS 24 34 74 3, however, the cold start and warm-up phase of the internal combustion engine are not considered separately.

Zwar ist es bereits bekannt (DE-PS 25 38 921), während der Warmlaufphase der Brennkraftmaschine zum Ausgleich der Kondensationsverluste an den kalten Brennraum- und an den Saugrohrwänden der Brennkraftmaschine ein fetteres Gemisch und zum Ausgleich der erhöhten Reibleistung der Brennkraftmaschine eine größere Menge Kraftstoff-Luft-Gemisch zuzuführen, als es der Stellung der Drosselklappe entspricht. Durch diese das Betriebsverhalten der Brennkraftmaschine in der Warmlaufphase verbessernden Maßnahmen wird jedoch die Abgasemission der Brennkraftmaschine verschlechtert.Although it is already known (DE-PS 25 38 921), during the Warm-up phase of the internal combustion engine to compensate for the condensation losses on the cold combustion chamber and on the Intake pipe walls of the internal combustion engine a richer mixture and to compensate for the increased friction of the internal combustion engine supply a larger amount of fuel-air mixture, than it corresponds to the position of the throttle valve. Through this the operating behavior of the internal combustion engine in the However, measures to improve the warm-up phase will reduce exhaust emissions the internal combustion engine deteriorated.

Aufgabe der Erfindung ist es, die Betriebsbedingungen einer Brennkraftmaschine in der Kaltstart- und Warmlaufphase zu verbessern.The object of the invention is to determine the operating conditions of an internal combustion engine in the cold start and warm-up phase to improve.

130040/0353130040/0353

U 94U 94

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Regelung des Kraftstoff-Luft-Gemisches und des Zündzeitpunktes entsprechend den Anforderungen der Arbeitszyklen beim Starten der Brennkraftmaschine über die Messung des Brennraum-Spitzendruckes erfolgt.According to the invention this object is achieved in that the Regulation of the fuel-air mixture and the ignition point according to the requirements of the work cycles when starting of the internal combustion engine by measuring the peak pressure in the combustion chamber he follows.

Durch die erfindungsgemäße Regelung wird unter Beibehaltung des guten Betriebsverhaltens der Brennkraftmaschine der Kraftstoffverbrauch gesenkt und die Abgasemission verbessert.The inventive scheme is maintained the good operating behavior of the internal combustion engine, the fuel consumption reduced and the exhaust emissions improved.

Der Erfindung liegt die Erkenntnis zugrunde, daß die Druckverläufe in den Zylindern von Brennkraftmaschinen beim Start derart sind, daß die Voraussetzungen für die Entzündung des Kraftstoff-Luft-Gemisches und die Flammenausbreitung in den ersten Arbeitszyklen nach dem Start sehr gut sind. Durch die niedrigen Drehzahlen der Brennkraftmaschine bekommen die Zylinder trotz geschlossener Drosselklappe im Saugrohr die volle Füllung, so daß die hohe Temperatur am Ende des Kompressionshubes die Entzündung und die Verbrennung des Kraftstoff-Luft-Gemisches sichert.The invention is based on the knowledge that the pressure curves in the cylinders of internal combustion engines when starting are such that the conditions for ignition of the fuel-air mixture and the flame spread in the first work cycles after start-up are very good. By the cylinders get the low engine speeds in spite of the closed throttle valve in the intake manifold full filling, so that the high temperature at the end of the compression stroke causes ignition and combustion of the Secures the fuel-air mixture.

1 30040/03531 30040/0353

Claims (1)

U 94U 94 PatentanspruchClaim Verfahren zur Regelung des Betriebsverhaltens einer
Brennkraftmaschine in der Kaltstart- und Warmlaufphase durch Änderung des Kraftstoff-Luft-Gemisches und des
ZündZeitpunktes, dadurch gekennzeichnet, daß die Regelung des Kraftstoff-Luft-Gemisches und des Zündzeitpunktes entsprechend den Anforderungen der Arbeitszyklen beim Starten der Brennkraftmaschine über die Messung des Brennraum- Spitzendruckes erfolgt.Method for regulating the operating behavior of a
Internal combustion engine in the cold start and warm-up phase by changing the fuel-air mixture and the
Ignition time, characterized in that the regulation of the fuel-air mixture and the ignition time takes place in accordance with the requirements of the work cycles when starting the internal combustion engine by measuring the peak pressure in the combustion chamber. 130040/0353130040/0353
DE19803011107 1980-03-22 1980-03-22 IC engine operational control - uses peak combustion pressure in cylinder as control parameter during cold starting Withdrawn DE3011107A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803011107 DE3011107A1 (en) 1980-03-22 1980-03-22 IC engine operational control - uses peak combustion pressure in cylinder as control parameter during cold starting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803011107 DE3011107A1 (en) 1980-03-22 1980-03-22 IC engine operational control - uses peak combustion pressure in cylinder as control parameter during cold starting

Publications (1)

Publication Number Publication Date
DE3011107A1 true DE3011107A1 (en) 1981-10-01

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Application Number Title Priority Date Filing Date
DE19803011107 Withdrawn DE3011107A1 (en) 1980-03-22 1980-03-22 IC engine operational control - uses peak combustion pressure in cylinder as control parameter during cold starting

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934002A1 (en) * 1988-10-24 1990-04-26 Mitsubishi Electric Corp STARTING DISCRIMINATION DEVICE FOR AN INTERNAL COMBUSTION ENGINE
DE19606835A1 (en) * 1995-02-24 1996-09-05 Unisia Jecs Corp Control system for IC engine
WO2004048761A1 (en) * 2002-11-27 2004-06-10 Ricardo Uk Limited Improved engine management

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934002A1 (en) * 1988-10-24 1990-04-26 Mitsubishi Electric Corp STARTING DISCRIMINATION DEVICE FOR AN INTERNAL COMBUSTION ENGINE
DE19606835A1 (en) * 1995-02-24 1996-09-05 Unisia Jecs Corp Control system for IC engine
DE19606835C2 (en) * 1995-02-24 1998-07-09 Unisia Jecs Corp Device and method for controlling an internal combustion engine
WO2004048761A1 (en) * 2002-11-27 2004-06-10 Ricardo Uk Limited Improved engine management

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8120 Willingness to grant licences paragraph 23
8141 Disposal/no request for examination