EP1406001A1 - Method for controlling ancillary equipment during combustion engine start or shut-off - Google Patents

Method for controlling ancillary equipment during combustion engine start or shut-off Download PDF

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Publication number
EP1406001A1
EP1406001A1 EP02102408A EP02102408A EP1406001A1 EP 1406001 A1 EP1406001 A1 EP 1406001A1 EP 02102408 A EP02102408 A EP 02102408A EP 02102408 A EP02102408 A EP 02102408A EP 1406001 A1 EP1406001 A1 EP 1406001A1
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
auxiliary unit
control system
speed ranges
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Granted
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EP02102408A
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German (de)
French (fr)
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EP1406001B1 (en
Inventor
Daniel Benjamin Kok
Engbert Spijker
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Ford Global Technologies LLC
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Ford Global Technologies LLC
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Priority to EP20020102408 priority Critical patent/EP1406001B1/en
Priority to DE50213704T priority patent/DE50213704D1/en
Publication of EP1406001A1 publication Critical patent/EP1406001A1/en
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    • 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
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
    • 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
    • F02D41/1497—With detection of the mechanical response of the engine
    • F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
    • 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
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015—Engines misfires

Definitions

  • the invention relates to a method for controlling an auxiliary unit during starting or stopping an internal combustion engine on a body attached and coupled to the auxiliary unit. Furthermore, the present concerns Invention a control system designed to carry out this method.
  • Integrated starter generators are in a so-called Stop-and-go operation is controlled in such a way that the internal combustion engine stop as soon as no mechanical power for locomotion Vehicle or the maintenance of auxiliary equipment is more necessary and that the internal combustion engine needs these services again start again. Because of the high performance of the starter generators the engine starts and stops very quickly, so that the driver has almost no delays in the response of his vehicle must accept. The problem, however, is that it starts or stops the internal combustion engine to vibrate the motor vehicle can be perceived by the vehicle occupants as unpleasant or annoying become. These disturbances mean acceptance of what is desirable per se Stop-and-go operations to a considerable extent.
  • the object of the present invention was a device and to provide a method which is as trouble-free as possible Starting and / or stopping an internal combustion engine allowed.
  • the method according to the invention is used to control one with an internal combustion engine coupled auxiliary unit while starting or stopping the Internal combustion engine attached to a body.
  • auxiliary unit is basically any device separate from the drive train understand the power in the form of rotational energy to the internal combustion engine can transmit and / or take up from this.
  • the auxiliary unit is an electric starter, an electric generator or a electrical integrated starter generator.
  • the term internal combustion engine in the present case also the parts associated with vibration mechanics of the drive train.
  • the regulatory process is characterized by that the auxiliary unit is controlled so that the excitation of resonant Natural vibrations of the internal combustion engine relative to the body is reduced.
  • Such a control procedure can be used when starting or stopping a disturbing vibrations of the internal combustion engine Motor vehicle without design changes in the engine compartment to a minimum be reduced. What is important for this positive effect is the knowledge that vibrations primarily through the excitation of resonant natural vibrations of the Internal combustion engine are generated against the body and that the art or the sequence of the starting process or stopping process has an influence has to what extent excited resonant natural vibrations become. By actively regulating the auxiliary unit, which makes the generation more resonant Natural vibrations can be suppressed or minimized as far as possible the disturbing vibrations when starting or stopping the internal combustion engine be avoided.
  • the auxiliary unit regulated such that during starting or stopping the internal combustion engine the dwell time in critical speed ranges, in which resonant natural vibrations of the internal combustion engine are minimized.
  • Such a method must therefore only the speed of the internal combustion engine observed and the timing of starting or stopping in Dependence on this can be varied.
  • the above critical speed ranges can e.g. B. in the frame can be determined from test series. These are preferably set so that they the natural vibration frequency of the internal combustion engine in its suspension correspond.
  • the natural vibration frequency can be simulated and / or simple measurements for each type of motor vehicle and optionally individually easily determine for each individual motor vehicle, without this being an operation the internal combustion engine would be required. From the determined natural frequencies can then immediately read the associated critical speeds be, the speed in revolutions per second of the natural frequency in Numerical oscillations per second or both quantities are an integer Represent multiples of each other.
  • the values for the critical speed ranges can be implemented immediately when implementing a control algorithm be used. Furthermore, these values can be customized for detected every motor vehicle and / or during the operation of a motor vehicle are constantly being redetermined and adapted.
  • the dwell time can be critical Shorten speed ranges in particular by making the auxiliary unit short before and / or when passing through the critical speed ranges an increased Power is supplied.
  • the auxiliary unit then transmits this increased power on the internal combustion engine, which accelerates their speed change and thus the desired rapid passage through the critical speeds. Since the Power increase is only temporary, this will result in the energy supply of the auxiliary unit is not overloaded.
  • the invention further relates to a control system for controlling one with a Internal combustion engine coupled auxiliary unit, the internal combustion engine is attached to a body.
  • the control system is designed to to carry out a method of the type explained above. That is, according to the process, in particular the auxiliary unit, can be regulated in this way, that an excitation of resonant natural vibrations of the internal combustion engine compared to the body is reduced.
  • the control system preferably has signal inputs for the speed and / or the rotational position of the internal combustion engine.
  • the rotational position the internal combustion engine is typically in degrees of the crankshaft angle measured.
  • the control system can be adjusted from the rotational position by a time derivative of the speed of the internal combustion engine or a corresponding one Determine size. Knowing the speed allows the auxiliary unit to do so to regulate that the dwell time in critical speed ranges is minimized.
  • the control system can in particular be designed to increased the auxiliary unit during starting in critical speed ranges Perform performance or critical during stopping Speed ranges from the auxiliary unit to derive increased power.
  • the auxiliary unit can basically be any separate device act the rotational energy with the internal combustion engine in one or two Can exchange directions.
  • the auxiliary unit can be an electrical one Starter (“starter”), an electrical generator or - particularly preferred - be an integrated starter generator, the latter depending on the electrical circuit Absorbs energy and generates mechanical rotational energy from it (Starter) or vice versa absorbs mechanical rotational energy and from it generates electrical energy (generator).
  • Starter electrical one Starter
  • an electrical generator or - particularly preferred - be an integrated starter generator, the latter depending on the electrical circuit Absorbs energy and generates mechanical rotational energy from it (Starter) or vice versa absorbs mechanical rotational energy and from it generates electrical energy (generator).
  • starter generators are especially for a low-consumption and low-emission stop-and-go operation Internal combustion engine used with frequent stops and restarts.
  • the single figure shows the components of a motor vehicle with an inventive regulated integrated starter generator.
  • the figure shows schematically the internal combustion engine 2 of a motor vehicle and an integrated starter generator coupled to the shaft of the internal combustion engine 3 shown.
  • the internal combustion engine 2 and the integrated starter generator 3 are about indicated suspension points 1 and over a support rod 4 is mounted on body structures 5.
  • the internal combustion engine 2 and the drive train (clutch, gearbox, etc.) coupled to it can be in swing these suspensions. This can lead to resonant natural vibrations come in which the internal combustion engine 2 with its horizontal and / or vertical natural frequency oscillates with respect to the vehicle structure 5. Such resonant natural vibrations are disturbing in the vehicle Vibrations noticeable.
  • the starter generator 3 can be used both as an electric motor and be used as a generator.
  • the Acceptance of this for reasons of fuel economy and emission reduction desirable stop-and-go operation by the user does not depend, however
  • Control system 6 reached Reduction is particularly important the excitation of natural vibrations in suspensions that drive the drivetrain support in the vertical direction.
  • the figure first shows one with the integrated starter generator 3 coupled control 7, which the starter generator 3 supplied or checked electrical power.
  • the regulatory system 6, which for example in a microcontroller or within the usual Motor control can be implemented as a program is on the output side with the Control 7 coupled, the system of control 7 commands u can send the electrical to be replaced with the starter generator 3 Prescribe performance.
  • the control 6 also receives signals on the input side from known motor sensors, which represent the engine speed n and / or the absolute crankshaft angle ⁇ . With the help of these input signals, the control 6 can determine whether the internal combustion engine 2 during a starting process or during the Stopping in a critical speed range in which the speed with at least one vertical or horizontal natural frequency of the internal combustion engine and the drive train essentially coincides. In these speed ranges there is excitation of resonant natural vibrations of the internal combustion engine and thus to the undesirable vibrations in the motor vehicle.
  • the control 6 is designed so that the dwell time of the internal combustion engine in the critical speed ranges to minimize.
  • the controller 6 controls the control 7 so that during the engine starting or stopping the acceleration or delay before the phase in which the engine speed is increased matches the resonance frequencies of the engine mount. hereby reduces the drive train to build up vibration energy in the time available for the resonance frequencies and thus the transmission of vibration energy on the vehicle body. In this way, the Increased comfort of vehicle occupants during starting or switching off and thus the acceptance of stop-and-go operations can be improved.

Abstract

The method involves controlling the auxiliary device (3) so as to reduce resonant natural oscillations of the internal combustion engine (2) relative to the body (5). The auxiliary device is controled so as to minimize the periods spent in critical revolution rate ranges in which resonant natural oscillations of the internal combustion engine are stimulated. AN Independent claim is also included for the following: (a) a regulating system for regulating an auxiliary unit coupled to an internal combustion engine suspended from a body.

Description

Die Erfindung betrifft ein Verfahren zur Regelung eines Hilfsaggregats während des Startens oder Anhaltens einer Brennkraftmaschine, die an einer Karosserie angebracht und mit dem Hilfsaggregat gekoppelt ist. Ferner betrifft die vorliegende Erfindung ein zur Durchführung dieses Verfahrens ausgebildetes Regelungssystem.The invention relates to a method for controlling an auxiliary unit during starting or stopping an internal combustion engine on a body attached and coupled to the auxiliary unit. Furthermore, the present concerns Invention a control system designed to carry out this method.

Brennkraftmaschinen benötigen in der Regel ein Hilfsaggregat, durch welches sie während des Anlassens in Bewegung versetzt werden können. Bei in Kraftfahrzeugen verwendeten Brennkraftmaschinen ist dieses Hilfsaggregat üblicherweise ein Elektromotor ("Starter"). Weiterhin ist es bekannt, Brennkraftmaschinen während ihres Anhaltens mit einem Hilfsaggregat in Form eines elektrischen Generators ("Lichtmaschine") zu koppeln, welcher der Brennkraftmaschine mechanische Leistung entnimmt und daher ihre Rotation bremst.Internal combustion engines usually require an auxiliary unit through which they can be set in motion during starting. In in motor vehicles Internal combustion engine used, this auxiliary unit is usually an electric motor ("starter"). Furthermore, it is known to use internal combustion engines during stopping with an auxiliary unit in the form of an electric generator ("Alternator") to couple which the internal combustion engine mechanical Takes power and therefore slows their rotation.

Um den Kraftstoffverbrauch und die Abgasemissionen von Kraftfahrzeugen zu verringern, werden diese zunehmend mit integrierten Starter-Generatoren ausgestattet, welche leistungsstark sind und in sich die Funktionen eines Elektromotors und Generators vereinigen. Integrierte Starter-Generatoren werden in einem sogenannten Stop-and-go-Betrieb derart angesteuert, daß diese die Brennkraftmaschine anhalten, sobald keine mechanische Leistung für die Fortbewegung des Fahrzeuges oder die Unterhaltung von Hilfseinrichtungen mehr erforderlich ist, und daß sie die Brennkraftmaschine bei erneutem Bedarf an diesen Leistungen wieder starten. Aufgrund der hohen Leistungsfähigkeit der Starter-Generatoren erfolgt das Starten und Anhalten der Brennkraftmaschine dabei sehr schnell, so daß der Fahrer nahezu keine Verzögerungen in der Reaktion seines Fahrzeuges hinnehmen muß. Problematisch ist jedoch, daß es während des Startens oder Anhaltens der Brennkraftmaschine zu Vibrationen des Kraftfahrzeuges kommen kann, die von den Fahrzeuginsassen als unangenehm bzw. störend wahrgenommen werden. Diese Störungen stehen der Akzeptanz des an sich wünschenswerten Stop-and-go-Betriebs in erheblichem Maße entgegen.To fuel consumption and exhaust emissions from motor vehicles too reduce, they are increasingly equipped with integrated starter generators, which are powerful and in themselves the functions of an electric motor and generator unite. Integrated starter generators are in a so-called Stop-and-go operation is controlled in such a way that the internal combustion engine stop as soon as no mechanical power for locomotion Vehicle or the maintenance of auxiliary equipment is more necessary and that the internal combustion engine needs these services again start again. Because of the high performance of the starter generators the engine starts and stops very quickly, so that the driver has almost no delays in the response of his vehicle must accept. The problem, however, is that it starts or stops the internal combustion engine to vibrate the motor vehicle can be perceived by the vehicle occupants as unpleasant or annoying become. These disturbances mean acceptance of what is desirable per se Stop-and-go operations to a considerable extent.

Vor diesem Hintergrund war es Aufgabe der vorliegenden Erfindung, eine Vorrichtung und ein Verfahren bereitzustellen, welche bzw. welches ein möglichst störungsfreies Starten und/oder Anhalten einer Brennkraftmaschine erlaubt.Against this background, the object of the present invention was a device and to provide a method which is as trouble-free as possible Starting and / or stopping an internal combustion engine allowed.

Diese Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 1 sowie durch ein Regelungssystem mit den Merkmalen des Anspruchs 6 gelöst.This object is achieved by a method with the features of claim 1 and solved by a control system with the features of claim 6.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen enthalten.Advantageous embodiments of the invention are contained in the subclaims.

Das erfindungsgemäße Verfahren dient der Regelung eines mit einer Brennkraftmaschine gekoppelten Hilfsaggregats während des Startens oder Anhaltens der Brennkraftmaschine, die an einer Karosserie angebracht bzw. befestigt ist. Unter einem Hilfsaggregat ist dabei grundsätzlich jede vom Antriebsstrang separate Einrichtung zu verstehen, die Leistung in Form von Rotationsenergie an die Brennkraftmaschine übertragen und/oder von dieser aufnehmen kann. Typischerweise ist das Hilfsaggregat ein elektrischer Starter, ein elektrischer Generator oder ein elektrischer integrierter Starter-Generator. Weiterhin soll der Begriff der Brennkraftmaschine vorliegend auch die schwingungsmechanisch zugehörigen Teile des Antriebsstranges umfassen. Das Regelungsverfahren ist dadurch gekennzeichnet, daß das Hilfsaggregat derart geregelt wird, daß die Anregung von resonanten Eigenschwingungen der Brennkraftmaschine gegenüber der Karosserie reduziert wird.The method according to the invention is used to control one with an internal combustion engine coupled auxiliary unit while starting or stopping the Internal combustion engine attached to a body. Under an auxiliary unit is basically any device separate from the drive train understand the power in the form of rotational energy to the internal combustion engine can transmit and / or take up from this. typically, the auxiliary unit is an electric starter, an electric generator or a electrical integrated starter generator. Furthermore, the term internal combustion engine in the present case also the parts associated with vibration mechanics of the drive train. The regulatory process is characterized by that the auxiliary unit is controlled so that the excitation of resonant Natural vibrations of the internal combustion engine relative to the body is reduced.

Durch ein derartiges Regelungsverfahrens können die bei einem Starten oder Anhalten einer Brennkraftmaschine zu beobachtenden störenden Vibrationen des Kraftfahrzeuges ohne konstruktive Änderungen im Motorraum auf ein Minimum reduziert werden. Wichtig für diesen positiven Effekt ist die Erkenntnis, daß Vibrationen vornehmlich durch die Anregung resonanter Eigenschwingungen der Brennkraftmaschine gegenüber der Karosserie erzeugt werden und daß die Art beziehungsweise der Ablauf des Startvorganges oder Anhaltvorganges einen Einfluß darauf hat, in welchem Ausmaß resonante Eigenschwingungen angeregt werden. Durch eine aktive Regelung des Hilfsaggregats, die die Erzeugung resonanter Eigenschwingungen möglichst unterdrückt oder minimiert, können daher die störenden Vibrationen beim Starten oder Anhalten der Brennkraftmaschine vermieden werden.Such a control procedure can be used when starting or stopping a disturbing vibrations of the internal combustion engine Motor vehicle without design changes in the engine compartment to a minimum be reduced. What is important for this positive effect is the knowledge that vibrations primarily through the excitation of resonant natural vibrations of the Internal combustion engine are generated against the body and that the art or the sequence of the starting process or stopping process has an influence has to what extent excited resonant natural vibrations become. By actively regulating the auxiliary unit, which makes the generation more resonant Natural vibrations can be suppressed or minimized as far as possible the disturbing vibrations when starting or stopping the internal combustion engine be avoided.

Gemäß einer speziellen Ausgestaltung des Verfahrens wird das Hilfsaggregat derart geregelt, daß während des Startens oder Anhaltens der Brennkraftmaschine die Verweildauer in kritischen Drehzahlbereichen, in denen resonante Eigenschwingungen der Brennkraftmaschine angeregt werden, minimiert wird. Zur Umsetzung eines solchen Verfahrens muß daher lediglich die Drehzahl der Brennkraftmaschine beobachtet und der zeitliche Ablauf des Startens oder Anhaltens in Abhängigkeit hiervon variiert werden.According to a special embodiment of the method, the auxiliary unit regulated such that during starting or stopping the internal combustion engine the dwell time in critical speed ranges, in which resonant natural vibrations of the internal combustion engine are minimized. For implementation Such a method must therefore only the speed of the internal combustion engine observed and the timing of starting or stopping in Dependence on this can be varied.

Die vorstehend genannten kritischen Drehzahlbereiche können z. B. im Rahmen von Testreihen ermittelt werden. Vorzugsweise werden diese so festgelegt, daß sie der Schwingungs-Eigenfrequenz der Brennkraftmaschine in ihrer Aufhängung entsprechen. Die Schwingungs-Eigenfrequenz läßt sich durch Simulationen und/oder einfache Messungen für jeden Kraftfahrzeugtyp und gegebenenfalls individuell für jedes einzelne Kraftfahrzeug leicht bestimmen, ohne daß hierzu ein Betrieb der Brennkraftmaschine erforderlich wäre. Aus den ermittelten Eigenfrequenzen können dann unmittelbar die zugehörigen kritischen Drehzahlen abgelesen werden, wobei die Drehzahl in Umdrehungen pro Sekunde der Eigenfrequenz in Schwingungen pro Sekunde zahlenmäßig entspricht oder beide Größen ein ganzzahliges Vielfaches voneinander darstellen. Die Werte für die kritischen Drehzahlbereiche können unmittelbar bei der Implementation eines Regelungsalgorithmus verwendet werden. Weiterhin können diese Werte gegebenenfalls individuell für jedes Kraftfahrzeug festgestellt und/oder während des Betriebs eines Kraftfahrzeuges ständig neu ermittelt und adaptiert werden. The above critical speed ranges can e.g. B. in the frame can be determined from test series. These are preferably set so that they the natural vibration frequency of the internal combustion engine in its suspension correspond. The natural vibration frequency can be simulated and / or simple measurements for each type of motor vehicle and optionally individually easily determine for each individual motor vehicle, without this being an operation the internal combustion engine would be required. From the determined natural frequencies can then immediately read the associated critical speeds be, the speed in revolutions per second of the natural frequency in Numerical oscillations per second or both quantities are an integer Represent multiples of each other. The values for the critical speed ranges can be implemented immediately when implementing a control algorithm be used. Furthermore, these values can be customized for detected every motor vehicle and / or during the operation of a motor vehicle are constantly being redetermined and adapted.

Beim Starten einer Brennkraftmaschine läßt sich die Verweildauer in kritischen Drehzahlbereichen insbesondere dadurch verkürzen, daß dem Hilfsaggregat kurz vor dem und/oder bei Durchlaufen der kritischen Drehzahlbereiche eine erhöhte Leistung zugeführt wird. Diese erhöhte Leistung überträgt das Hilfsaggregat dann auf die Brennkraftmaschine, was deren Drehzahländerung beschleunigt und damit das gewünschte schnelle Durchlaufen der kritischen Drehzahlen bewirkt. Da die Leistungserhöhung nur vorübergehend ist, wird hierdurch die Energieversorgung des Hilfsaggregats nicht überlastet.When starting an internal combustion engine, the dwell time can be critical Shorten speed ranges in particular by making the auxiliary unit short before and / or when passing through the critical speed ranges an increased Power is supplied. The auxiliary unit then transmits this increased power on the internal combustion engine, which accelerates their speed change and thus the desired rapid passage through the critical speeds. Since the Power increase is only temporary, this will result in the energy supply of the auxiliary unit is not overloaded.

Weiterhin kann zum Verkürzen der Verweildauer in kritischen Drehzahlbereichen während des Anhaltens einer Brennkraftmaschine dem Hilfsaggregat kurz vor dem und/oder bei Durchlaufen der kritischen Drehzahlbereiche eine erhöhte Leistung entnommen werden. Die erhöhte Leistungsentnahme führt dann zu dem gewünschten schnelleren Durchlaufen der kritischen Drehzahlen. Da die zusätzliche Leistungsentnahme nur verhältnismäßig kurzzeitig erforderlich ist, kann die dabei anfallende Überschussenergie ohne Probleme dissipiert werden.Furthermore, it can shorten the dwell time in critical speed ranges while stopping an internal combustion engine the auxiliary unit shortly before and / or increased performance when passing through the critical speed ranges be removed. The increased power consumption then leads to the desired one faster passing through the critical speeds. Because the additional The withdrawal of services is only required for a relatively short time excess energy can be dissipated without problems.

Die Erfindung betrifft ferner ein Regelungssystem zur Regelung eines mit einer Brennkraftmaschine gekoppelten Hilfsaggregats, wobei die Brennkraftmaschine an einer Karosserie angebracht ist. Das Regelungssystem ist dahingehend ausgebildet, ein Verfahren der vorstehend erläuterten Art auszuführen. D. h., daß gemäß dem Verfahren insbesondere das Hilfsaggregat derart geregelt werden kann, daß eine Anregung von resonanten Eigenschwingungen der Brennkraftmaschine gegenüber der Karosserie reduziert wird.The invention further relates to a control system for controlling one with a Internal combustion engine coupled auxiliary unit, the internal combustion engine is attached to a body. The control system is designed to to carry out a method of the type explained above. That is, according to the process, in particular the auxiliary unit, can be regulated in this way, that an excitation of resonant natural vibrations of the internal combustion engine compared to the body is reduced.

Vorzugsweise weist das Regelungssystem Signaleingänge für die Drehzahl und/oder die Rotationsstellung der Brennkraftmaschine auf. Die Rotationsstellung der Brennkraftmaschine wird dabei typischerweise in Grad des Kurbelwellenwinkels gemessen. Aus der Rotationsstellung kann das Regelungssystem durch eine zeitliche Ableitung die Drehzahl der Brennkraftmaschine oder eine korrespondierende Größe ermitteln. Die Kenntnis der Drehzahl erlaubt es, das Hilfsaggregat so zu regeln, daß die Verweildauer in kritischen Drehzahlbereichen minimiert wird. Hierzu kann das Regelungssystem insbesondere dahingehend ausgebildet sein, während des Startens in kritischen Drehzahlbereichen dem Hilfsaggregat eine erhöhte Leistung zuzuführen beziehungsweise während des Anhaltens in kritischen Drehzahlbereichen dem Hilfsaggregat eine erhöhte Leistung zu entnehmen.The control system preferably has signal inputs for the speed and / or the rotational position of the internal combustion engine. The rotational position the internal combustion engine is typically in degrees of the crankshaft angle measured. The control system can be adjusted from the rotational position by a time derivative of the speed of the internal combustion engine or a corresponding one Determine size. Knowing the speed allows the auxiliary unit to do so to regulate that the dwell time in critical speed ranges is minimized. For this purpose, the control system can in particular be designed to increased the auxiliary unit during starting in critical speed ranges Perform performance or critical during stopping Speed ranges from the auxiliary unit to derive increased power.

Bei dem Hilfsaggregat kann es sich grundsätzlich um jede separate Einrichtung handeln, die Rotationsenergie mit der Brennkraftmaschine in einer oder in zwei Richtungen austauschen kann. Insbesondere kann das Hilfsaggregat ein elektrischer Starter ("Anlasser"), ein elektrischer Generator oder - besonders bevorzugt - ein integrierter Starter-Generator sein, wobei Letzterer je nach Beschaltung elektrische Energie aufnimmt und daraus mechanische Rotationsenergie erzeugt (Starter) oder umgekehrt mechanische Rotationsenergie aufnimmt und daraus elektrische Energie erzeugt (Generator). Derartige Starter-Generatoren werden insbesondere für einen verbrauchs- und emissionsarmen Stop-and-go-Betrieb einer Brennkraftmaschine mit häufigen Anhalten und Neustarten eingesetzt.The auxiliary unit can basically be any separate device act the rotational energy with the internal combustion engine in one or two Can exchange directions. In particular, the auxiliary unit can be an electrical one Starter ("starter"), an electrical generator or - particularly preferred - be an integrated starter generator, the latter depending on the electrical circuit Absorbs energy and generates mechanical rotational energy from it (Starter) or vice versa absorbs mechanical rotational energy and from it generates electrical energy (generator). Such starter generators are especially for a low-consumption and low-emission stop-and-go operation Internal combustion engine used with frequent stops and restarts.

Im Folgenden wird die Erfindung mit Hilfe der Figur beispielhaft näher erläutert.The invention is explained in more detail below by way of example with the aid of the figure.

Die einzige Figur zeigt die Komponenten eines Kraftfahrzeuges mit einem erfindungsgemäß geregelten integrierten Starter-Generator.The single figure shows the components of a motor vehicle with an inventive regulated integrated starter generator.

In der Figur sind schematisch die Brennkraftmaschine 2 eines Kraftfahrzeuges sowie ein mit der Welle der Brennkraftmaschine gekoppelter integrierter Starter-Generator 3 dargestellt. Die Brennkraftmaschine 2 und der integrierte Starter-Generator 3 sind über angedeutete Aufhängungspunkte 1 beziehungsweise über einen Stützstab 4 an Karosseriestrukturen 5 gelagert. Die Brennkraftmaschine 2 und der hieran angekoppelte Antriebsstrang (Kupplung, Getriebe, etc.) können in diesen Aufhängungen schwingen. Hierbei kann es zu resonanten Eigenschwingungen kommen, bei denen die Brennkraftmaschine 2 mit ihrer horizontalen und/oder vertikalen Eigenfrequenz gegenüber der Fahrzeugstruktur 5 schwingt. Derartige resonanten Eigenschwingungen machen sich im Fahrzeug als störende Vibrationen bemerkbar. The figure shows schematically the internal combustion engine 2 of a motor vehicle and an integrated starter generator coupled to the shaft of the internal combustion engine 3 shown. The internal combustion engine 2 and the integrated starter generator 3 are about indicated suspension points 1 and over a support rod 4 is mounted on body structures 5. The internal combustion engine 2 and the drive train (clutch, gearbox, etc.) coupled to it can be in swing these suspensions. This can lead to resonant natural vibrations come in which the internal combustion engine 2 with its horizontal and / or vertical natural frequency oscillates with respect to the vehicle structure 5. Such resonant natural vibrations are disturbing in the vehicle Vibrations noticeable.

Der Starter-Generator 3 kann je nach Betriebsart sowohl als Elektromotor als auch als Generator eingesetzt werden. Integrierte Starter-Generatoren finden insbesondere in modernen Kraftfahrzeugen Einsatz, um die Brennkraftmaschine in einem Stop-and-go-Betrieb abzustellen, wenn keine mechanische Leistung benötigt wird, und sie anschließend bei Bedarf möglichst verzögerungslos wieder zu starten. Die Akzeptanz dieses aus Gründen der Kraftstoffersparnis und der Abgasreduktion wünschenswerten Stop-and-go-Betriebs durch den Benutzer hängt jedoch nicht zuletzt davon ab, ob die beim Starten und Anhalten der Brennkraftmaschine üblicherweise auftretenden störenden Vibrationen des Kraftfahrzeuges vermieden werden können. Letzteres wird mit dem nachfolgend beschriebenen erfindungsgemäßen Regelungssystem 6 erreicht. Besonders wichtig ist dabei die Verminderung der Anregung von Eigenschwingungen bei Aufhängungen, die den Antriebsstrang in vertikaler Richtung unterstützen.Depending on the operating mode, the starter generator 3 can be used both as an electric motor and be used as a generator. Integrated starter generators in particular in modern motor vehicles to use the internal combustion engine in one Stop-and-go operation when no mechanical power is required and then restart them as soon as possible if necessary. The Acceptance of this for reasons of fuel economy and emission reduction desirable stop-and-go operation by the user does not depend, however Finally, depending on whether the usual when starting and stopping the internal combustion engine occurring disturbing vibrations of the motor vehicle avoided can be. The latter is done with the invention described below Control system 6 reached. Reduction is particularly important the excitation of natural vibrations in suspensions that drive the drivetrain support in the vertical direction.

Die Figur zeigt diesbezüglich zunächst eine mit dem integrierten Starter-Generator 3 gekoppelte Ansteuerung 7, welche die dem Starter-Generator 3 zugeführte oder entnommene elektrische Leistung kontrolliert. Das Regelungssystem 6, welches beispielsweise in einem Mikrocontroller oder innerhalb der üblichen Motorsteuerung als Programm realisiert sein kann, ist ausgangsseitig mit der Ansteuerung 7 gekoppelt, wobei das System der Ansteuerung 7 Kommandos u senden kann, welche die mit dem Starter-Generator 3 auszutauschende elektrische Leistung vorschreiben.In this regard, the figure first shows one with the integrated starter generator 3 coupled control 7, which the starter generator 3 supplied or checked electrical power. The regulatory system 6, which for example in a microcontroller or within the usual Motor control can be implemented as a program is on the output side with the Control 7 coupled, the system of control 7 commands u can send the electrical to be replaced with the starter generator 3 Prescribe performance.

Die Regelung 6 erhält ferner eingangsseitig von bekannten Motorsensoren Signale, welche die Motordrehzahl n und/oder den absoluten Kurbelwellenwinkel α repräsentieren. Mit Hilfe dieser Eingangssignale kann die Regelung 6 feststellen, ob sich die Brennkraftmaschine 2 während eines Startvorganges oder während des Anhaltens in einem kritischen Drehzahlbereich befindet, in dem die Drehzahl mit mindestens einer vertikalen oder horizontalen Eigenfrequenz der Brennkraftmaschine und des Antriebsstranges im Wesentlichen übereinstimmt. In diesen Drehzahlbereichen kommt es zur Anregung resonanter Eigenschwingungen der Bren n-kraftmaschine und damit zu den unerwünschten Vibrationen im Kraftfahrzeug. The control 6 also receives signals on the input side from known motor sensors, which represent the engine speed n and / or the absolute crankshaft angle α. With the help of these input signals, the control 6 can determine whether the internal combustion engine 2 during a starting process or during the Stopping in a critical speed range in which the speed with at least one vertical or horizontal natural frequency of the internal combustion engine and the drive train essentially coincides. In these speed ranges there is excitation of resonant natural vibrations of the internal combustion engine and thus to the undesirable vibrations in the motor vehicle.

Zur Minimierung derartiger Vibrationen ist die Regelung 6 dahingehend ausgebildet, die Verweildauer der Brennkraftmaschine in den kritischen Drehzahlbereichen zu minimieren. Die Regelung 6 steuert die Ansteuerung 7 dabei so an, daß während des Anlassens oder Anhaltens der Brennkraftmaschine die Beschleunigung beziehungsweise Verzögerung vor der Phase erhöht wird, in welcher die Motordrehzahl mit den Resonanzfrequenzen der Motoraufhängung übereinstimmt. Hierdurch reduziert sich die dem Antriebsstrang zum Aufbau von Vibrationsenergie in den Resonanzfrequenzen zur Verfügung stehende Zeit und damit die Übertragung von Vibrationsenergie auf die Fahrzeugkarosserie. Auf diese Weise kann der Komfort der Fahrzeuginsassen während des Anlassens oder Abschaltens erhöht und damit die Akzeptanz des Stop-and-go-Betriebs verbessert werden.In order to minimize such vibrations, the control 6 is designed so that the dwell time of the internal combustion engine in the critical speed ranges to minimize. The controller 6 controls the control 7 so that during the engine starting or stopping the acceleration or delay before the phase in which the engine speed is increased matches the resonance frequencies of the engine mount. hereby reduces the drive train to build up vibration energy in the time available for the resonance frequencies and thus the transmission of vibration energy on the vehicle body. In this way, the Increased comfort of vehicle occupants during starting or switching off and thus the acceptance of stop-and-go operations can be improved.

Claims (8)

Verfahren zur Regelung eines Hilfsaggregats (3) während des Startens oder Anhaltens einer Brennkraftmaschine (2), die an einer Karosserie (5) angebracht und mit dem Hilfsaggregat gekoppelt ist,
dadurch gekennzeichnet, daß
   das Hilfsaggregat (3) derart geregelt wird, daß die Anregung von resonanten Eigenschwingungen der Brennkraftmaschine (2) gegenüber der Karosserie (5) reduziert wird.Method for controlling an auxiliary unit (3) while starting or stopping an internal combustion engine (2) which is attached to a body (5) and is coupled to the auxiliary unit,
characterized in that
the auxiliary unit (3) is controlled in such a way that the excitation of resonant natural vibrations of the internal combustion engine (2) with respect to the body (5) is reduced. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
   das Hilfsaggregat (3) derart geregelt wird, daß die Verweildauer in kritischen Drehzahlbereichen, in denen resonante Eigenschwingungen der Brennkraftmaschine (2) angeregt werden, minimiert wird.Method according to claim 1,
characterized in that
the auxiliary unit (3) is controlled in such a way that the dwell time in critical speed ranges in which resonant natural vibrations of the internal combustion engine (2) are excited is minimized. Verfahren nach Anspruch 2,
dadurch gekennzeichnet, daß
   die kritischen Drehzahlbereiche der Schwingungs-Eigenfrequenz der Brennkraftmaschine (2) in ihrer Aufhängung (1) entsprechen.Method according to claim 2,
characterized in that
the critical speed ranges correspond to the natural vibration frequency of the internal combustion engine (2) in its suspension (1). Verfahren nach Anspruch 2 oder 3,
dadurch gekennzeichnet, daß
   dem Hilfsaggregat (3) vor dem und/oder bei dem Durchlaufen kritischer Drehzahlbereiche während des Startens eine erhöhte Leistung zugeführt wird. Method according to claim 2 or 3,
characterized in that
the auxiliary unit (3) is supplied with increased power before and / or when it passes through critical speed ranges during starting. Verfahren nach mindestens einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, daß
   dem Hilfsaggregat (3) vor dem und/oder bei dem Durchlaufen kritischer Drehzahlbereiche während des Anhaltens der Brennkraftmaschine (2) eine erhöhte Leistung entnommen wird.Method according to at least one of claims 2 to 4,
characterized in that
Increased power is withdrawn from the auxiliary unit (3) before and / or when passing through critical speed ranges while the internal combustion engine (2) is stopped. Regelungssystem zur Regelung eines mit einer Brennkraftmaschine (2) gekoppelten Hilfsaggregats (3), wobei die Brennkraftmaschine an einer Karosserie (5) aufgehängt ist,
dadurch gekennzeichnet, daß
   das Regelungssystem (6) dahingehend ausgebildet ist, ein Verfahren nach mindestens einem der Ansprüche 1 bis 5 auszuführen.Control system for controlling an auxiliary unit (3) coupled to an internal combustion engine (2), the internal combustion engine being suspended from a body (5),
characterized in that
the control system (6) is designed to carry out a method according to at least one of claims 1 to 5. Regelungssystem nach Anspruch 6,
dadurch gekennzeichnet, daß
   dieses Signaleingänge für die Drehzahl (n) und/oder die Rotationsstellung (α) der Brennkraftmaschine (2) aufweist.Control system according to claim 6,
characterized in that
this has signal inputs for the speed (n) and / or the rotational position (α) of the internal combustion engine (2). Regelungssystem nach Anspruch 6 oder 7,
dadurch gekennzeichnet, daß
   das Hilfsaggregat als elektrischer Starter, elektrischer Generator oder integrierter Starter-Generator (3) ausgebildet ist.Control system according to claim 6 or 7,
characterized in that
the auxiliary unit is designed as an electrical starter, an electrical generator or an integrated starter generator (3).
EP20020102408 2002-10-02 2002-10-02 Method for controlling ancillary equipment during combustion engine start or shut-off Expired - Fee Related EP1406001B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20020102408 EP1406001B1 (en) 2002-10-02 2002-10-02 Method for controlling ancillary equipment during combustion engine start or shut-off
DE50213704T DE50213704D1 (en) 2002-10-02 2002-10-02 Method for controlling an auxiliary unit during the starting or stopping of an internal combustion engine

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DE102008027659A1 (en) * 2008-06-10 2009-12-17 Bayerische Motoren Werke Aktiengesellschaft Device for automatic stoppage of motor vehicle internal combustion engine during dead-time or thrust operating phases of motor vehicle, has unit for applying counter moment on drive shaft of internal combustion engine
FR2988138A1 (en) * 2012-03-13 2013-09-20 Peugeot Citroen Automobiles Sa Control device for use in logic controller for power supply system used to drive car, has control unit for providing force to engine to carry out compressions according to unusual periodicity, and alternator-starter for rotating shaft
DE102005021801B4 (en) * 2004-05-14 2015-11-05 General Motors Corp. A method of controlling an active engine stop of a hybrid electric vehicle
EP3508051A1 (en) * 2018-01-08 2019-07-10 CLAAS Selbstfahrende Erntemaschinen GmbH Agricultural work machine, in particular chaff cutter
WO2020016007A1 (en) * 2018-07-19 2020-01-23 Bayerische Motoren Werke Aktiengesellschaft Method and control unit for operating an oil circuit of an internal combustion engine

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DE102005021801B4 (en) * 2004-05-14 2015-11-05 General Motors Corp. A method of controlling an active engine stop of a hybrid electric vehicle
DE102008027659A1 (en) * 2008-06-10 2009-12-17 Bayerische Motoren Werke Aktiengesellschaft Device for automatic stoppage of motor vehicle internal combustion engine during dead-time or thrust operating phases of motor vehicle, has unit for applying counter moment on drive shaft of internal combustion engine
FR2988138A1 (en) * 2012-03-13 2013-09-20 Peugeot Citroen Automobiles Sa Control device for use in logic controller for power supply system used to drive car, has control unit for providing force to engine to carry out compressions according to unusual periodicity, and alternator-starter for rotating shaft
EP3508051A1 (en) * 2018-01-08 2019-07-10 CLAAS Selbstfahrende Erntemaschinen GmbH Agricultural work machine, in particular chaff cutter
WO2020016007A1 (en) * 2018-07-19 2020-01-23 Bayerische Motoren Werke Aktiengesellschaft Method and control unit for operating an oil circuit of an internal combustion engine

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