EP1573175A1 - Arrangement for adjusting the relative angle of rotation between a camshaft and a crankshaft - Google Patents

Arrangement for adjusting the relative angle of rotation between a camshaft and a crankshaft

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Publication number
EP1573175A1
EP1573175A1 EP03753275A EP03753275A EP1573175A1 EP 1573175 A1 EP1573175 A1 EP 1573175A1 EP 03753275 A EP03753275 A EP 03753275A EP 03753275 A EP03753275 A EP 03753275A EP 1573175 A1 EP1573175 A1 EP 1573175A1
Authority
EP
European Patent Office
Prior art keywords
control unit
arrangement
camshaft
crankshaft
angle
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
EP03753275A
Other languages
German (de)
French (fr)
Other versions
EP1573175B1 (en
Inventor
Dirk Neubauer
Detlef Axmacher
Markus Wilke
Massimiliano Gasparro
Frank Pachan
Lars PFÜTZENREUTER
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.)
Schaeffler Engineering GmbH
Original Assignee
AFT Atlas Fahrzeugtechnik GmbH
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 AFT Atlas Fahrzeugtechnik GmbH filed Critical AFT Atlas Fahrzeugtechnik GmbH
Publication of EP1573175A1 publication Critical patent/EP1573175A1/en
Application granted granted Critical
Publication of EP1573175B1 publication Critical patent/EP1573175B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/352—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2201/00—Electronic control systems; Apparatus or methods therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2800/00—Methods of operation using a variable valve timing mechanism

Definitions

  • the invention relates to an arrangement for adjusting the angle of rotation relation between camshaft and crankshaft according to the preamble of patent claim 1.
  • the crankshaft drives one or more camshafts via a primary drive, which is designed, for example, as a toothed belt.
  • a camshaft gear is attached to each camshaft, via which the primary drive drives the camshaft.
  • the crankshaft angle of rotation is translated at any time, with 720 ° crankshaft angle of rotation ⁇ «being converted into 360 ° camshaft angle of rotation ⁇ N.
  • the operating properties of an internal combustion engine can be optimized, in particular with regard to fuel consumption, exhaust gas emission and smooth running, if the system coupled via the primary drive can be changed between the camshaft and the crankshaft.
  • DE 100 38 354 A1 discloses an arrangement for adjusting the angle of rotation relationship between the camshaft and the crankshaft by means of a swashplate mechanism.
  • An additional drive works here a swash plate gear, which is arranged between the camshaft gear and the camshaft, additionally on the camshaft. This means that the camshaft can be adjusted relative to the crankshaft.
  • the object of the invention is to demonstrate a simple and inexpensive arrangement for adjusting the angle of rotation relationship between the camshaft and crankshaft.
  • such an arrangement has a modular structure, so that the various tasks of such an arrangement are distributed over a number of control units, which in turn can be arranged independently of one another
  • the advantage of the invention is that such a structure is very inexpensive because functions of other control units can also be used.
  • Another advantage of the invention is that individual control devices of the arrangement can be dimensioned smaller. With such an arrangement it is also possible to perform the tasks depending on certain mechanical and / or electrical parameters, such as e.g. to distribute the power, the current and the voltage to the most suitable modules, in particular control units, that best meet the requirements.
  • the setpoint can be specified by the engine control. It is also an advantage if the setpoint is an angle, a speed, a current or a torque value that is particularly easy to measure and control.
  • Figure 1 Arrangement with target angle specification.
  • Figure 2 Arrangement with target speed specification
  • FIG. 1 shows an arrangement in which the setpoint for the control device 7 is specified by the engine control unit 1.
  • This is a target angle, which is to be set as a specific angle of rotation between crankshaft 6 and camshaft 5 with respect to a basic position.
  • the engine control unit 1 which defines this target angle 1, actually controls the internal combustion engine which drives the crankshaft 6.
  • This setpoint angle serves as a reference value for a second control unit 2, which at the same time also records measured values from sensors 8a, 8b, which record the actual value of the variable to be controlled.
  • sensors 8a, 8b can detect the position of camshaft and crankshaft 5, 6.
  • the angle of rotation between the two shafts can be determined from the position measurements of crankshaft and camshaft 5, 6.
  • This twist angle can be changed by the adjuster 4.
  • the value of the setpoint angle is passed on from engine control unit 1 to a second control unit 2.
  • the second control unit 2 controls an electric motor 3, which actuates the adjuster 4.
  • the second control device 2 for the electric motor 3 contains the output stage for controlling the electric motor 3 and the position control of the arrangement.
  • the arrangement shown is a control circuit with a control device 7 and a control system 9, the control system being the camshaft and the crankshaft 5, 6, the angle of rotation relationship of which is changed with respect to one another, and the control system is composed of the following components:
  • Setpoint adjuster wherein the setpoint is generated by the engine control 1, which is transmitted to the control unit 2, in which the circuit for the setpoint adjustment is located.
  • 8a, 8b are formed on the camshaft or on the crankshaft and alternatively or additionally consist of sensors that recognize the position of the electric motor or the adjuster.
  • a comparator which compares the actual value with the target value, this function also being integrated in control unit 2 in the application example.
  • FIG. 2 also shows an arrangement in which the setpoint for the control device 7 is specified by the engine control 1.
  • the setpoint angle is not determined and passed on directly, but the setpoint speed for the electric motor 3 is determined and passed on by the engine control 1 of the internal combustion engine, with which the desired angle of rotation between the crankshaft and the camshaft can be set.
  • This target speed value serves as a reference value for the control unit 2, which can simultaneously process measured values from sensors 8a, 8b, which represent the actual value of the controlled variable and the angle of rotation. These sensors 8a, 8b can, for example, detect the position of the camshaft and crankshaft 5, 6 in the controlled system 9. As an alternative or in addition, the instantaneous speed of the electric motor 3 can also be measured and then compared in the control unit 2 with the target value.
  • the control unit 2 for the electric motor 3 also contains the output stage for controlling the electric motor 3. However, the position control of the arrangement is carried out by the motor controller 1, which varies the target speed accordingly until the desired state between the camshaft and crankshaft is reached. However, this position control can also be implemented in a different arrangement.
  • control unit 2 can also take on other functions.
  • the arrangement shown is a control circuit with a control device 7 and a control system 9, the control system being the camshaft and the crankshaft 5, 6, the angle of rotation relationship of which is changed with respect to one another, and the control system is composed of the following components:
  • a setpoint adjuster composed of a plurality of control devices 1, 2, the setpoint being set by the engine controller 1 is generated, which is transmitted to the control unit 2, which contains the output stage for the electric motor.
  • the position control can be accommodated both in the engine control 1 or in the control unit 2.
  • a measuring device which in the exemplary embodiment is designed on the electric motor 3 in the form of a tachometer and / or is formed by the sensors 8a and 8b from the previous exemplary embodiment.
  • a comparator which compares the actual value with the target value, this function also being integrated in control unit 2 in the application example.
  • FIG. 3 shows an arrangement in which the setpoint for the control device 7 is given to the control unit 2 as the setpoint current or as the setpoint torque for the electric motor 3 by the engine control unit 1.
  • This target current or the target torque indirectly determines or changes the angle of rotation between the camshaft and crankshaft 6, 7.
  • the level of the target current or torque is specified by the engine control unit.
  • the setpoint ' from the engine control 1 is forwarded to the control unit 2.
  • the value influences the operating parameters for the electric motor 3, which in turn then drives the adjuster 4 more or less.
  • the adjuster 4 has a swash plate mechanism which is connected to the camshaft 5 stands, which is driven by the crankshaft 6.
  • current actual values are recorded in the electric motor 3 or also in the adjuster and made available to the control unit as a comparison value for the target / actual comparison.
  • the engine control unit 1 which determines the target current or the target torque, actually controls the internal combustion engine which drives the crankshaft 6.
  • This target current value or the target torque value serves as a reference value for the control unit 2, which at the same time also records measured values on the electric motor 3 and / or on the adjuster 4, which represent the current comparison value with the target value.
  • the controlled system includes the camshaft and crankshaft 5, 6, the angle of rotation relation of which is changed by changing the operating current of the electric motor and thus also the torque or the speed of the electric motor or the adjuster.
  • the associated control device consists of the following components:
  • a setpoint adjuster the setpoint being generated and updated by the engine control 1 and the setpoint being transferred to the control unit 2 in which the circuit with which it is located
  • Setpoint can be set.
  • control device has a modular structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

Disclosed is an arrangement for adjusting the relative angle of rotation between a camshaft (5) and a crankshaft. Such an arrangement requires a lot of parts, some of which require different operating conditions. The novel arrangement is designed in a modular manner, i.e. rather than being disposed inside a common housing, the components of the arrangement are separately designed according to the function or operating conditions, for example, or are shared by other control devices or regulating devices. The invention is particularly advantageous in that such arrangements can be produced in a reduced size and at a lower cost. Such arrangement are needed to adjust valve play in internal combustion engines.

Description

Anordnung zum Verstellen der Drehwinkelrelation zwischen Nockenwelle und Kurbelwelle Arrangement for adjusting the angle of rotation relationship between the camshaft and crankshaft
Die Erfindung betrifft eine Anordnung zum Verstellen der Drehwinkelrelation zwischen Nockenwelle und Kurbelwelle gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an arrangement for adjusting the angle of rotation relation between camshaft and crankshaft according to the preamble of patent claim 1.
Bei Brennkraftmaschinen treibt die Kurbelwelle über einen Primärantrieb, der beispielsweise als Zahnriemen ausgebildet ist, eine oder mehrere Nockenwellen an. Dazu ist an jeder Nockenwelle ein Nockenwellenrad befestigt, über welches der Primärantrieb die Nockenwelle antreibt. Dabei erfolgt zu jedem Zeitpunkt eine Übersetzung des Drehwinkels der Kurbelwelle, wobei 720° Kurbelwellendrehwinkel φ« in 360° Nockenwellendrehwinkel ψN umgesetzt werden. Das Verhältnis der beiden Drehwinkel ist durch diese Kopplung konstant. In den meisten Anwendungen ergibt diese feste Kopplung zwischen Nockenwelle und Kurbelwelle ein Verhältnis von: ^ i = _ . φ∑ (f) 2 In internal combustion engines, the crankshaft drives one or more camshafts via a primary drive, which is designed, for example, as a toothed belt. For this purpose, a camshaft gear is attached to each camshaft, via which the primary drive drives the camshaft. The crankshaft angle of rotation is translated at any time, with 720 ° crankshaft angle of rotation φ «being converted into 360 ° camshaft angle of rotation ψ N. The ratio of the two angles of rotation is constant through this coupling. In most applications, this fixed coupling between the camshaft and crankshaft results in a ratio of: ^ i = _. φ∑ (f) 2
Jedoch lassen sich die Betriebseigenschaften einer Brennkraftmaschine optimieren, insbesondere hinsichtlich des Kraftstoffverbrauchs, der Abgasemission und der Laufkultur, wenn das über den Primärantrieb gekoppelten System zwischen der Nockenwelle und der Kurbelwelle verändert werden kann.However, the operating properties of an internal combustion engine can be optimized, in particular with regard to fuel consumption, exhaust gas emission and smooth running, if the system coupled via the primary drive can be changed between the camshaft and the crankshaft.
In der DE 100 38 354 A1 wird eine Anordnung zum Verstellen der Drehwinkelrelation zwischen Nockenwelle und Kurbelwelle mittels Taumelscheibengetriebe offenbart. Hier wirkt ein zusätzlicher Antrieb über ein Taumelscheibengetriebe, das zwischen dem Nockenwellenrad und der Nockenwelle angeordnet ist, zusätzlich auf die Nockenwelle ein. Dies bewirkt, dass die Nockenwelle gegenüber der Kurbelwelle verstellt werden kann.DE 100 38 354 A1 discloses an arrangement for adjusting the angle of rotation relationship between the camshaft and the crankshaft by means of a swashplate mechanism. An additional drive works here a swash plate gear, which is arranged between the camshaft gear and the camshaft, additionally on the camshaft. This means that the camshaft can be adjusted relative to the crankshaft.
Aufgabe der Erfindung ist es, eine einfache und kostengünstige Anordnung zum Verstellen der Drehwinkelrelation zwischen Nockenwelle und Kurbelwelle aufzuzeigen.The object of the invention is to demonstrate a simple and inexpensive arrangement for adjusting the angle of rotation relationship between the camshaft and crankshaft.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Patentanspruch 1 gelöst. Hierbei ist eine solche Anordnung modular aufgebaut, so dass die verschiedenen Aufgaben einer solchen Anordnung auf mehrere Steuergeräte verteilt sind, die wiederum unabhängig voneinander angeordnet sein könnenThis object is achieved by the features in claim 1. In this case, such an arrangement has a modular structure, so that the various tasks of such an arrangement are distributed over a number of control units, which in turn can be arranged independently of one another
Die Vorteil der Erfindung besteht darin, dass ein solcher Aufbau sehr kostengünstig ist, weil Funktionen andere Steuergeräte gleichfalls genutzt werden können. Ein weiterer Vorteil der Erfindung besteht darin, dass einzelne Steuergeräte der Anordnung kleiner dimensioniert werden können. Auch ist es mit einer solchen Anordnung möglich, die Aufgaben in Abhängigkeit von bestimmten mechanischen und/oder elektrischen Parametern, wie z.B. der Leistung, dem Strom und der Spannung auf die dafür am besten geeignete Module, insbesondere Steuergeräte, zu verteilen, die den Anforderungen am ehesten entsprechen.The advantage of the invention is that such a structure is very inexpensive because functions of other control units can also be used. Another advantage of the invention is that individual control devices of the arrangement can be dimensioned smaller. With such an arrangement it is also possible to perform the tasks depending on certain mechanical and / or electrical parameters, such as e.g. to distribute the power, the current and the voltage to the most suitable modules, in particular control units, that best meet the requirements.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen. Hierbei kann der Sollwert von der Motorsteuerung vorgegeben werden. Gleichfalls von Vorteil ist es wenn der Sollwert ein Winkel-, ein Drehzahl-, ein Strom- oder Drehmomentwert ist, die sich besonders einfach messen und regeln lassen.Advantageous further developments result from the subclaims. The setpoint can be specified by the engine control. It is also an advantage if the setpoint is an angle, a speed, a current or a torque value that is particularly easy to measure and control.
Die Erfindung soll nachfolgend anhand von Ausführungsbeispielen und Figuren näher erläutert werden. Es zeigen:The invention will be explained in more detail below with the aid of exemplary embodiments and figures. Show it:
Figur 1 : Anordnung mit Soll-Winkel-Vorgabe. Figur 2: Anordnung mit Soll-Drehzahl-VorgabeFigure 1: Arrangement with target angle specification. Figure 2: Arrangement with target speed specification
Figur 3: Anordnung mit Soll-Strom bzw. Soll-Moment -VorgabeFigure 3: Arrangement with target current or target torque specification
Figur 1 zeigt eine Anordnung bei dem der Sollwert für die Regeleinrichtung 7 vom Motorsteuergerät 1 vorgegeben wird. Hierbei handelt es sich um einen Sollwinkel, der als bestimmter Verdrehwinkel zwischen Kurbelwelle 6 und Nockenwelle 5 gegenüber einer Grundstellung einzustellen ist. Dadurch wird die Drehwinkelrelation der beiden Wellen 5, 6 zueinander verändert. Das Motorsteuergerät 1, das diesen Sollwinkel festlegt 1 steuert eigentlich die Brennkraftmaschine, welche die Kurbelwelle 6 antreibt. Dieser Sollwinkel dient als Referenzwert für ein zweites Steuergerät 2, das gleichzeitig auch Messwerte von Sensoren 8a, 8b aufnimmt, die den Ist-Wert der zu regelnden Größe erfassen. Hierbei können beispielsweise Sensoren 8a, 8b die Position von Nocken- und Kurbelwelle 5, 6 erfassen. Aus den Positionsmessungen von Kurbel- und Nockenwelle 5, 6 lässt sich der Verdrehwinkel zwischen den beiden Wellen ermitteln. Dieser Verdrehwinkel kann vom Versteller 4 verändert werden. In diesem Ausführungsbeispiel wird der Wert des Sollwinkels vom Motorsteuergerät 1 in ein zweites Steuergerät 2 weitergeleitet. Das zweite Steuergerät 2 steuert einen Elektromotor 3 an, der den Versteller 4 betätigt. Das zweite Steuergerät 2 für den Elektromotor 3 beinhaltet im Anwendungsbeispiel die Endstufe zur Ansteuerung des Elektromotors 3 und die Lageregelung der Anordnung. Die abgebildete Anordnung ist ein Regelkreis mit einer Regeleinrichtung 7 und einer Regelstrecke 9, wobei die Regelstrecke die Nocken- und die Kurbelwelle 5, 6 ist, deren Drehwinkelrelation zueinander verändert wird, und die Regeleinrichtung aus folgenden Komponenten zusammengesetzt ist:FIG. 1 shows an arrangement in which the setpoint for the control device 7 is specified by the engine control unit 1. This is a target angle, which is to be set as a specific angle of rotation between crankshaft 6 and camshaft 5 with respect to a basic position. As a result, the rotation angle relation of the two shafts 5, 6 to one another is changed. The engine control unit 1, which defines this target angle 1, actually controls the internal combustion engine which drives the crankshaft 6. This setpoint angle serves as a reference value for a second control unit 2, which at the same time also records measured values from sensors 8a, 8b, which record the actual value of the variable to be controlled. For example, sensors 8a, 8b can detect the position of camshaft and crankshaft 5, 6. The angle of rotation between the two shafts can be determined from the position measurements of crankshaft and camshaft 5, 6. This twist angle can be changed by the adjuster 4. In this exemplary embodiment, the value of the setpoint angle is passed on from engine control unit 1 to a second control unit 2. The second control unit 2 controls an electric motor 3, which actuates the adjuster 4. In the application example, the second control device 2 for the electric motor 3 contains the output stage for controlling the electric motor 3 and the position control of the arrangement. The arrangement shown is a control circuit with a control device 7 and a control system 9, the control system being the camshaft and the crankshaft 5, 6, the angle of rotation relationship of which is changed with respect to one another, and the control system is composed of the following components:
- einem aus mehreren Steuergeräten 1 , 2 zusammengesetzten- A composed of several control units 1, 2
Sollwerteinsteller, wobei der Sollwert von der Motorsteuerung 1 generiert wird, welcher in das Steuergerät 2 übertragen wird, in dem sich die Schaltung zur Sollwerteinstellung befindet.Setpoint adjuster, wherein the setpoint is generated by the engine control 1, which is transmitted to the control unit 2, in which the circuit for the setpoint adjustment is located.
- einer Messeinrichtung, die im Ausführungsbeispiel von den Sensoren- A measuring device, in the embodiment of the sensors
8a, 8b an der Nocken- bzw. an der Kurbelwelle ausgebildet werden und alternativ oder zusätzlich aus Sensoren bestehen, die die Position des Elektromotors bzw. des Verstellers erkennen.8a, 8b are formed on the camshaft or on the crankshaft and alternatively or additionally consist of sensors that recognize the position of the electric motor or the adjuster.
- einem Vergleicher, der den Istwert mit dem Sollwert vergleicht, wobei im Anwendungsbeispiel diese Funktion gleichfalls im Steuergerät 2 integriert ist.- A comparator, which compares the actual value with the target value, this function also being integrated in control unit 2 in the application example.
- und dem Stellglied, das den Verdrehwinkel der Nockenwelle beeinflusst und das im Anwendungsbeispiel vom Elektromotor 3 und dem Versteller 4 gebildet wird.- And the actuator, which influences the angle of rotation of the camshaft and which is formed in the application example by the electric motor 3 and the adjuster 4.
Figur 2 zeigt gleichfalls eine Anordnung bei dem der Sollwert für die Regeleinrichtung 7 von der Motorsteuerung 1 vorgegeben wird. Hierbei wird jedoch nicht der Sollwinkel direkt ermittelt und weitergegeben, sondern es wird die Soll-Drehzahl für den Elektromotor 3 von der Motorsteuerung 1 der Brennkraftmaschine ermittelt und weitergegeben, mit dem sich der gewünschte Verdrehwinkel zwischen Kurbelwelle und Nockenwelle einstellen lässt.FIG. 2 also shows an arrangement in which the setpoint for the control device 7 is specified by the engine control 1. Here, however, the setpoint angle is not determined and passed on directly, but the setpoint speed for the electric motor 3 is determined and passed on by the engine control 1 of the internal combustion engine, with which the desired angle of rotation between the crankshaft and the camshaft can be set.
Dieser Soll-Drehzahl-Wert dient als Referenzwert für das Steuergerät 2, das gleichzeitig auch Messwerte von Sensoren 8a, 8b verarbeiten kann, die den Ist-Wert der Regelgröße dem Verdrehwinkel darstellen. Diese Sensoren 8a, 8b können beispielsweise die Position von Nocken- und Kurbelwelle 5, 6 in der Regelstrecke 9 erfassen. Alternativ oder zusätzlich kann auch die momentane Drehzahl des Elektromotors 3 gemessen und dann im Steuergerät 2 mit dem Sollwert verglichen werden. Das Steuergerät 2 für den Elektromotor 3 beinhaltet auch die Endstufe zur Ansteuerung des Elektromotors 3. Die Lageregelung der Anordnung übernimmt jedoch die Motorsteuerung 1 , welche die Soll-Drehzahl entsprechend variiert, bis der gewünschte Zustand zwischen Nocken- und Kurbelwelle erreicht ist. Jedoch kann diese Lageregelung auch in einer anderen Anordnung realisiert sein.. Selbstverständlich kann das Steuergerät 2 auch andere Funktionen mit übernehmen. Die abgebildete Anordnung ist ein Regelkreis mit einer Regeleinrichtung 7 und einer Regelstrecke 9, wobei die Regelstrecke die Nocken- und die Kurbelwelle 5, 6 ist, deren Drehwinkelrelation zueinander verändert wird, und die Regeleinrichtung aus folgenden Komponenten zusammengesetzt ist:This target speed value serves as a reference value for the control unit 2, which can simultaneously process measured values from sensors 8a, 8b, which represent the actual value of the controlled variable and the angle of rotation. These sensors 8a, 8b can, for example, detect the position of the camshaft and crankshaft 5, 6 in the controlled system 9. As an alternative or in addition, the instantaneous speed of the electric motor 3 can also be measured and then compared in the control unit 2 with the target value. The control unit 2 for the electric motor 3 also contains the output stage for controlling the electric motor 3. However, the position control of the arrangement is carried out by the motor controller 1, which varies the target speed accordingly until the desired state between the camshaft and crankshaft is reached. However, this position control can also be implemented in a different arrangement. Of course, the control unit 2 can also take on other functions. The arrangement shown is a control circuit with a control device 7 and a control system 9, the control system being the camshaft and the crankshaft 5, 6, the angle of rotation relationship of which is changed with respect to one another, and the control system is composed of the following components:
- einem aus mehreren Steuergeräten 1 , 2 zusammengesetzten Sollwerteinsteller, wobei der Sollwert von der Motorsteuerung 1 generiert wird, welcher in das Steuergerät 2 übertragen wird, das die Endstufe für den Elektromotor beinhaltet. Die Lageregelung kann hierbei sowohl im Motorsteuerung 1 oder im Steuergerät 2 untergebracht sein. - einer Messeinrichtung, die im Ausführungsbeispiel am Elektromotor 3 in Form eines Drehzahlmessers ausgebildet ist und/oder von den Sensoren 8a und 8b aus dem vorangegangenen Ausführungsbeispiel gebildet werden.- A setpoint adjuster composed of a plurality of control devices 1, 2, the setpoint being set by the engine controller 1 is generated, which is transmitted to the control unit 2, which contains the output stage for the electric motor. The position control can be accommodated both in the engine control 1 or in the control unit 2. - A measuring device, which in the exemplary embodiment is designed on the electric motor 3 in the form of a tachometer and / or is formed by the sensors 8a and 8b from the previous exemplary embodiment.
- einem Vergleicher, der den Istwert mit dem Sollwert vergleicht, wobei im Anwendungsbeispiel diese Funktion gleichfalls im Steuergerät 2 integriert ist.- A comparator, which compares the actual value with the target value, this function also being integrated in control unit 2 in the application example.
- und dem Stellglied, das den Verdrehwinkel der Nockenwelle beeinflusst und das im Anwendungsbeispiel vom Elektromotor 3 und dem Versteller 4 gebildet wird.- And the actuator, which influences the angle of rotation of the camshaft and which is formed in the application example by the electric motor 3 and the adjuster 4.
Die einzelnen elektrischen und elektronischen Funktionen und Aufgaben werden in der Anordnung an unterschiedlichen Stellen erledigt. Insbesondere übernehmen andere Steuergeräte oder Vorrichtungen Teilaufgaben bzw. Teilfunktionen der Anordnung. Gleichfalls ist es nicht zwingend notwendig, das sich die oben aufgeführten Komponenten in ein und demselben Gehäuse befinden. Äquivalent zur oben beschriebenen Regelung auf eine Soll-Drehzahl des Elektromotors 3 ist die Regelung auf eine Soll-Drehzahl des Verstellers 4, da die Drehzahl des Verstellers 4 direkt von der Drehzahl des Elektromotors 3 abhängig ist.The individual electrical and electronic functions and tasks are carried out in different positions in the arrangement. In particular, other control devices or devices perform subtasks or subfunctions of the arrangement. Likewise, it is not absolutely necessary that the components listed above are in the same housing. Equivalent to the regulation to a target speed of the electric motor 3 described above is the regulation to a target speed of the adjuster 4, since the speed of the adjuster 4 is directly dependent on the speed of the electric motor 3.
Figur 3 zeigt eine Anordnung bei dem der Sollwert für die Regeleinrichtung 7 dem Steuergerät 2 als Soll-Strom oder als Soll- Moment für den Elektromotor 3 vom Motorsteuergerät 1 vorgegeben wird. Dieser Soll-Strom bzw. das Soll-Moment bestimmt bzw. verändert indirekt den Verdrehwinkel zwischen Nocken- und Kurbelwelle 6, 7. Die Höhe des Soll-Stroms bzw. Moments wird vom Motorsteuergerät vorgegeben. Der Sollwert ' von der Motorsteuerung 1 wird an das Steuergerät 2 weitergeleitet. Hier beeinflusst der Wert die Betriebsparameter für den Elektromotor 3, der wiederum den Versteller 4 dann mehr oder weniger antreibt. Auch in diesem Ausführungsbeispiel weist der Versteller 4 ein Taumelscheibengetriebe auf, das mit der Nockenwelle 5 in Verbindung steht, welche von der Kurbelwelle 6 angetrieben wird. Um das Erreichen des Soll-Wertes im Steuergerät zu bestimmen werden aktuelle Ist-Werte im Elektromotor 3 oder aber auch im Versteller erfasst und dem Steuergerät als Vergleichswert zum Soll-Ist-Vergleich zur Verfügung gestellt.FIG. 3 shows an arrangement in which the setpoint for the control device 7 is given to the control unit 2 as the setpoint current or as the setpoint torque for the electric motor 3 by the engine control unit 1. This target current or the target torque indirectly determines or changes the angle of rotation between the camshaft and crankshaft 6, 7. The level of the target current or torque is specified by the engine control unit. The setpoint ' from the engine control 1 is forwarded to the control unit 2. Here the value influences the operating parameters for the electric motor 3, which in turn then drives the adjuster 4 more or less. In this exemplary embodiment as well, the adjuster 4 has a swash plate mechanism which is connected to the camshaft 5 stands, which is driven by the crankshaft 6. In order to determine whether the target value has been reached in the control unit, current actual values are recorded in the electric motor 3 or also in the adjuster and made available to the control unit as a comparison value for the target / actual comparison.
Auch hier steuert das Motorsteuergerät 1 , das den Soll-Strom oder das Soll-Moment festlegt, eigentlich die Brennkraftmaschine, welche die Kurbelwelle 6 antreibt. Dieser Soll-Stromwert bzw. der Soll-Momentwert dient als Referenzwert für das Steuergerät 2, das gleichzeitig auch Messwerte am Elektromotor 3 und/oder am Versteller 4 erfasst, die den aktuellen Vergleichswert zum Sollwert darstellen. Hierbei beinhaltet die Regelstrecke die Nocken- und die Kurbelwelle 5, 6, deren Drehwinkelrelation zueinander verändert wird, indem der Betriebsstrom des Elektromotors und damit auch das Drehmoment bzw. die Drehzahl von Elektromotor bzw. dem Versteller verändert wird. Die dazugehörige Regeleinrichtung setzt sich aus folgenden Komponenten zusammen:Here too, the engine control unit 1, which determines the target current or the target torque, actually controls the internal combustion engine which drives the crankshaft 6. This target current value or the target torque value serves as a reference value for the control unit 2, which at the same time also records measured values on the electric motor 3 and / or on the adjuster 4, which represent the current comparison value with the target value. Here, the controlled system includes the camshaft and crankshaft 5, 6, the angle of rotation relation of which is changed by changing the operating current of the electric motor and thus also the torque or the speed of the electric motor or the adjuster. The associated control device consists of the following components:
- einen Sollwerteinsteller, wobei der Sollwert von der Motorsteuerung 1 generiert und aktualisiert wird und der Sollwert in das Steuergerät 2 übertragen wird, in dem sich die Schaltung befindet, mit der diesera setpoint adjuster, the setpoint being generated and updated by the engine control 1 and the setpoint being transferred to the control unit 2 in which the circuit with which it is located
Sollwert eingestellt werden kann.Setpoint can be set.
- einer Messeinrichtung, die im Ausführungsbeispiel einen Strom, eine- A measuring device, the current, a in the embodiment
Drehzahl oder ein Drehmoment am Elektromotor oder am Versteller misst, die einen aktuellen Istwert für das Steuergerät 2 zum Vergleich mit dem Sollwert liefert.Measures speed or a torque on the electric motor or on the adjuster, which delivers a current actual value for the control unit 2 for comparison with the setpoint.
- einem Vergleicher, der den Istwert mit dem Sollwert vergleicht, wobei im Anwendungsbeispiel diese Funktion im Steuergerät 2 integriert ist.- A comparator that compares the actual value with the target value, this function being integrated in control unit 2 in the application example.
- und dem Stellglied, das den Verdrehwinkel der Nockenwelle 5 beeinflusst und das im Anwendungsbeispiel vom Elektromotor 3 und dem Versteller 4 gebildet wird.- And the actuator, which influences the angle of rotation of the camshaft 5 and which is formed by the electric motor 3 and the adjuster 4 in the application example.
Die einzelnen elektrischen und elektronischen Funktionen und Aufgaben werden in der Anordnung an unterschiedlichen Stellen erledigt. Insbesondere übernehmen andere Steuergeräte oder Vorrichtungen Teilaufgaben bzw. Teilfunktionen der Anordnung. Gleichfalls ist es nicht notwendig, das sich die oben aufgeführten Komponenten in ein und demselben Gehäuse befinden, sondern sie können auch in verschiedenen Geräten, die auch noch andere Funktionen aufweisen können, eingebaut bzw. integriert werden.The individual electrical and electronic functions and tasks are carried out in different positions in the arrangement. In particular, other control devices or devices perform subtasks or subfunctions of the arrangement. Likewise, it is not necessary that the components listed above are in and are in the same housing, but they can also be installed or integrated in different devices, which may also have other functions.
All diese Ausführungsbeispiele lassen sich auf beliebige Weise kombinieren, wichtig ist dabei nur, dass die Regeleinrichtung einen modularen Aufbau aufweist. All of these exemplary embodiments can be combined in any way, it is only important that the control device has a modular structure.

Claims

Patentansprücheclaims
1) Anordnung zum Verstellen der Drehwinkelrelation zwischen Nocken- welle (5) und Kurbelwelle (6), wobei die Anordnung folgende1) Arrangement for adjusting the angle of rotation relation between camshaft (5) and crankshaft (6), the arrangement following
Bestandteile aufweist:Features:
- einen Nockenwellenversteller (4), der den Drehwinkel der Nockenwelle (5) gegenüber dem Drehwinkel der Kurbelwelle (6) verstellt, - einen Elektromotor (3), der den Nockenwellenversteller (5) antreibt,- a camshaft adjuster (4) which adjusts the angle of rotation of the camshaft (5) relative to the angle of rotation of the crankshaft (6), - an electric motor (3) which drives the camshaft adjuster (5),
- ein erstes Steuergerät (2) für diesen Elektromotor (3) zum Regeln auf einen Sollwert,- a first control device (2) for this electric motor (3) for regulating to a target value,
- dadurch gekennzeichnet, dass- characterized in that
- das erste Steuergerät (2) mit einem zweiten Steuergerät (1) in Verbindung steht, das den Sollwert für das erste Steuergerät (2) vorgibt.- The first control unit (2) is connected to a second control unit (1) which specifies the setpoint for the first control unit (2).
2) Anordnung nach Patentanspruch 1 , dadurch gekennzeichnet, dass das zweite Steuergerät (1) das Motorsteuergerät für die Brennkraftmaschine ist, welche die Nockenwelle (5) antreibt.2) Arrangement according to claim 1, characterized in that the second control unit (1) is the engine control unit for the internal combustion engine which drives the camshaft (5).
3) Anordnung nach Patentanspruch 1 oder 2 mit einer Messvorrichtung3) Arrangement according to claim 1 or 2 with a measuring device
(8a, 8b), welche den Istwert erfaßt, der die momentane Drehwinkelrelation beschreibt, dadurch gekennzeichnet, dass das erste Steuergerät (2) für den Elektromotor (3) eine Vergleichsvorrichtung beinhaltet, die den Sollwert mit dem Istwert vergleicht.(8a, 8b), which detects the actual value that describes the instantaneous angle of rotation relation, characterized in that the first control device (2) for the electric motor (3) contains a comparison device which compares the desired value with the actual value.
4) Anordnung nach Patentanspruch 1 oder 2 mit einer Messvorrichtung4) Arrangement according to claim 1 or 2 with a measuring device
(8a, 8b), welche den Istwert erfaßt, der die momentane Drehwinkelrelation beschreibt, dadurch gekennzeichnet, dass das zweite Steuergerät (1) eine Vergleichsvorrichtung beinhaltet, die den Sollwert mit dem Istwert vergleicht.(8a, 8b), which detects the actual value that describes the current angle of rotation relation, characterized in that the second control unit (1) contains a comparison device which compares the target value with the actual value.
5) Anordnung nach Patentanspruch 1 oder 2 mit einer Messvorrichtung5) Arrangement according to claim 1 or 2 with a measuring device
(8a, 8b), welche den Istwert erfasst, der die momentane Drehwinkelrelation beschreibt, dadurch gekennzeichnet, dass die(8a, 8b), which detects the actual value that describes the current angle of rotation relation, characterized in that the
Anordnung eine Vergleichsvorrichtung aufweist, die den Sollwert mit dem Istwert vergleicht und diese Vergleichsvorrichtung mit mindestens einem der beiden Steuergeräte (1 , 2) in Verbindung steht.Arrangement has a comparison device which compares the target value with the actual value and this comparison device is connected to at least one of the two control units (1, 2).
6) Anordnung nach Patentanspruch 3, 4 oder 5 mit einer Regelung, die auf das erste Steuergerät (2) einwirkt, bis der Istwert mit dem Sollwert übereinstimmt, dadurch gekennzeichnet, dass die Regelung im ersten Steuergerät (2) integriert ist.6) Arrangement according to claim 3, 4 or 5 with a control system, which acts on the first control unit (2) until the actual value coincides with the target value, characterized in that the control system is integrated in the first control unit (2).
7) Anordnung nach Patentanspruch 3, 4 oder 5 mit einer Regelung, die auf das erste Steuergerät (2) einwirkt, bis der Istwert mit dem Sollwert übereinstimmt, dadurch gekennzeichnet, dass die Regelung im zweiten Steuergerät (1) integriert ist.7) Arrangement according to claim 3, 4 or 5 with a control system which acts on the first control unit (2) until the actual value coincides with the target value, characterized in that the control system is integrated in the second control unit (1).
8) Anordnung nach Patentanspruch 3, 4 oder 5 mit einer Regelung, die auf das erste Steuergerät (2) einwirkt, bis der Istwert mit dem Sollwert übereinstimmt, dadurch gekennzeichnet, dass die Regelung in einem dritten Steuergerät integriert ist. 8) Arrangement according to claim 3, 4 or 5 with a control system, which acts on the first control unit (2) until the actual value coincides with the target value, characterized in that the control system is integrated in a third control unit.
EP03753275A 2002-12-18 2003-09-06 Arrangement for adjusting the relative angle of rotation between a camshaft and a crankshaft Expired - Lifetime EP1573175B1 (en)

Applications Claiming Priority (3)

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DE10259133 2002-12-18
DE10259133A DE10259133A1 (en) 2002-12-18 2002-12-18 Arrangement for adjusting the angle of rotation relationship between the camshaft and crankshaft
PCT/DE2003/002965 WO2004057161A1 (en) 2002-12-18 2003-09-06 Arrangement for adjusting the relative angle of rotation between a camshaft and a crankshaft

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EP1573175A1 true EP1573175A1 (en) 2005-09-14
EP1573175B1 EP1573175B1 (en) 2008-03-26

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EP1573175B1 (en) 2008-03-26
US20050252469A1 (en) 2005-11-17
DE50309500D1 (en) 2008-05-08
DE10259133A1 (en) 2004-07-01
ES2302940T3 (en) 2008-08-01
WO2004057161A1 (en) 2004-07-08
US7146947B2 (en) 2006-12-12

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