EP1573175B1 - 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 Download PDF

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Publication number
EP1573175B1
EP1573175B1 EP03753275A EP03753275A EP1573175B1 EP 1573175 B1 EP1573175 B1 EP 1573175B1 EP 03753275 A EP03753275 A EP 03753275A EP 03753275 A EP03753275 A EP 03753275A EP 1573175 B1 EP1573175 B1 EP 1573175B1
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EP
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Prior art keywords
control unit
arrangement
camshaft
rotation
angle
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EP03753275A
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German (de)
French (fr)
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EP1573175A1 (en
Inventor
Dirk Neubauer
Detlef Axmacher
Markus Wilke
Massimiliano Gasparro
Frank Pachan
Lars PFÜTZENREUTER
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Schaeffler Engineering GmbH
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AFT Atlas Fahrzeugtechnik GmbH
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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 Drehwinlkelrelation between the camshaft and crankshaft, with a camshaft adjuster, which adjusts the rotational angle of the camshaft relative to the rotational angle of the crankshaft, an electric motor which drives the camshaft adjuster, and a first control device for this electric motor for regulating to a desired value ,
  • the crankshaft drives one or more camshafts via a primary drive, which is designed, for example, as a toothed belt.
  • a camshaft wheel is attached to each camshaft, via which the primary drive drives the camshaft.
  • a translation of the rotational angle of the crankshaft wherein 720 ° crankshaft rotation angle ⁇ K in 360 ° camshaft rotation angle ⁇ N are implemented.
  • the operating characteristics of an internal combustion engine can be optimized, particularly with regard to fuel consumption, exhaust emission and running culture, when the system coupled via the primary drive between the camshaft and the crankshaft can be changed.
  • a hydraulic camshaft adjuster with an inner and an outer rotor comprises two pressure chambers, which are divided by a respective integrally formed with the rotor blades in two counteracting pressure chambers.
  • the pressure medium supply or pressure medium discharge to and from the pressure chambers is carried out by means of a control valve.
  • the control valve consists of a valve housing, on which a plurality of terminals are formed, and an axially displaceable in the valve housing control piston. The position of the spool within the valve body is determined by a stepper motor.
  • a control of this stepper motor is disclosed, wherein a desired value of the relative angular position of the camshaft relative to the crankshaft is compared with an actual value.
  • the difference between the two signals is fed to a first control unit which calculates a required position of the stepper motor and controls it in this position, and thus the control piston against the desired position within the valve housing.
  • the object of the invention is to show a simple and inexpensive arrangement for adjusting the rotational angle relation between the camshaft and crankshaft.
  • FIG. 3 shows an arrangement in which the target value for the control device 7 to the control unit 2 as a target current or as a desired torque for the electric motor 3 is predetermined by the engine control unit 1 .
  • This setpoint current or the setpoint torque indirectly determines or changes the angle of rotation between camshaft and crankshaft 6, 7 .
  • the amount of the desired current or torque is specified by the engine control unit.
  • the setpoint from the engine controller 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 in communication with the camshaft 5 is, which is driven by the crankshaft 6 .
  • current actual values in the electric motor 3 or in the adjuster are detected and made available to the control unit as a comparison value for the desired-actual comparison.
  • control device has a modular structure.

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

Die Erfindung betrifft eine Anordnung zum Verstellen der Drehwinlkelrelation zwischen Nockenwelle und Kurbelwelle, mit einen Nockenwellenversteller, der den Drehwinkel der Nockenwelle gegenüber dem Drehwinkel der Kurbelwelle verstellt, einen Elektromotor, der den Nockenwellenversteller antreibt, und einem ersten Steuergerät für diesen Elektromotor zum Regeln auf einen Sollwert.The invention relates to an arrangement for adjusting the Drehwinlkelrelation between the camshaft and crankshaft, with a camshaft adjuster, which adjusts the rotational angle of the camshaft relative to the rotational angle of the crankshaft, an electric motor which drives the camshaft adjuster, and a first control device for this electric motor for regulating to a desired value ,

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 ϕK in 360° Nockenwellendrehwinkel ϕN 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: ϕ N t ϕ K t = 1 2 .

Figure imgb0001
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 wheel is attached to each camshaft, via which the primary drive drives the camshaft. In this case, at any time a translation of the rotational angle of the crankshaft, wherein 720 ° crankshaft rotation angle φ K in 360 ° camshaft rotation angle φ N are implemented. The ratio of the two angles of rotation is constant due to this coupling. In most applications, this fixed coupling between the camshaft and the crankshaft results in a ratio of: φ N t φ K t = 1 2 ,
Figure imgb0001

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 characteristics of an internal combustion engine can be optimized, particularly with regard to fuel consumption, exhaust emission and running culture, when the system coupled via the primary drive between the camshaft and the crankshaft can be changed.

Stand der TechnikState of the art

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.In the DE 100 38 354 A1 an arrangement for adjusting the rotational angle relation between the camshaft and the crankshaft by means of a swashplate transmission is disclosed. Here, an additional drive via a swash plate mechanism, which is arranged between the camshaft gear and the camshaft, additionally acts on the camshaft. This causes the camshaft can be adjusted relative to the crankshaft.

In der US 5,218,935 ist ein hydraulischer Nockenwellenversteller mit einem Innen- und einem Außenrotor offenbart. Der Nockenwellenversteller umfasst zwei Druckkammern, welche durch jeweils einen einteilig mit dem Rotor ausgebildeten Flügel in zwei gegeneinander wirkende Druckkammern geteilt ist. Durch Druckmittelbeaufschlagung beziehungsweise -entleerung der Druckkammern ist die Phasenlage des Innenrotors relativ zum Außenrotor variabel einstellbar.
Die Druckmittelzufuhr bzw. Druckmittelabfuhr zu und von den Druckkammern wird mittels eines Steuerventils vorgenommen. Das Steuerventil besteht aus einem Ventilgehäuse, an dem mehrere Anschlüsse ausgebildet sind, und einem in dem Ventilgehäuse axial verschiebbaren Steuerkolben. Die Position des Steuerkolbens innerhalb des Ventilgehäuses wird durch einen Steppermotor festgelegt.
Des Weiteren ist eine Regelung dieses Steppermotors offenbart, wobei ein Sollwert der relativen Winkellage der Nockenwelle relativ zur Kurbelwelle mit einem Istwert verglichen wird. Die Differenz der beiden Signale wird einem ersten Steuergerät zugeführt, welches eine benötigte Position des Steppermotors errechnet und diesen in diese Position, und damit den Steuerkolben gegen die gewünschte Stellung innerhalb des Ventilgehäuses, steuert.In the US 5,218,935 a hydraulic camshaft adjuster with an inner and an outer rotor is disclosed. The camshaft adjuster comprises two pressure chambers, which are divided by a respective integrally formed with the rotor blades in two counteracting pressure chambers. By pressure medium loading or emptying of the pressure chambers, the phase position of the inner rotor is variably adjustable relative to the outer rotor.
The pressure medium supply or pressure medium discharge to and from the pressure chambers is carried out by means of a control valve. The control valve consists of a valve housing, on which a plurality of terminals are formed, and an axially displaceable in the valve housing control piston. The position of the spool within the valve body is determined by a stepper motor.
Furthermore, a control of this stepper motor is disclosed, wherein a desired value of the relative angular position of the camshaft relative to the crankshaft is compared with an actual value. The difference between the two signals is fed to a first control unit which calculates a required position of the stepper motor and controls it in this position, and thus the control piston against the desired position within the valve housing.

Aufgabenstellungtask

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 show a simple and inexpensive arrangement for adjusting the rotational angle relation between the camshaft and crankshaft.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruches 1, 2, 3, 4 oder 12 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 können.
Der 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.
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.This object is achieved by the features of claim 1, 2, 3, 4 or 12. In this case, such an arrangement is modular, so that the various tasks of such an arrangement are distributed to a plurality of control devices, which in turn may be arranged independently of each other.
The advantage of the invention is that such a construction is very cost-effective because functions other control devices can also be used. Another advantage of the invention is that individual control devices of the arrangement can be made smaller. It is also possible with such an arrangement to distribute the tasks depending on certain mechanical and / or electrical parameters, such as the power, the current and the voltage on the most suitable for this module, in particular control units that meet the requirements of most likely.
Advantageous developments emerge from the subclaims. Here, the setpoint can be specified by the engine control. Equally advantageous is when the setpoint is an angle, a speed, a current or torque value that can be very easily measured and controlled.

Die Erfindung soll nachfolgend anhand von Ausführungsbeispielen und Figuren näher erläutert werden. Es zeigen:

Figur 1:
Anordnung mit Soll-Winkel-Vorgabe.
Figur 2:
Anordnung mit Soll-Drehzahl-Vorgabe
Figur 3:
Anordnung mit Soll-Strom bzw. Soll-Moment -Vorgabe
The invention will be explained in more detail with reference to embodiments and figures. Show it:
FIG. 1:
Arrangement with target angle specification.
FIG. 2:
Arrangement with setpoint speed specification
FIG. 3:
Arrangement with setpoint current or setpoint 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:

  • einem aus mehreren Steuergeräten 1, 2 zusammengesetzten 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.
  • einer Messeinrichtung, die im Ausführungsbeispiel von den Sensoren 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.
  • einem Vergleicher, der den Istwert mit dem Sollwert vergleicht, wobei im Anwendungsbeispiel diese Funktion gleichfalls im Steuergerät 2 integriert ist.
  • und dem Stellglied, das den Verdrehwinkel der Nockenwelle beeinflusst und das im Anwendungsbeispiel vom Elektromotor 3 und dem Versteller 4 gebildet wird.
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 set as a specific angle of rotation between the crankshaft 6 and camshaft 5 relative to a basic position. As a result, the rotational angle relation of the two shafts 5, 6 is changed relative to one another. The engine control unit 1 , which determines 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 simultaneously also receives measured values from sensors 8a, 8b which detect the actual value of the variable to be controlled. In this case, for example, sensors 8a, 8b detect the position of the camshaft and crankshaft 5, 6 . From the position measurements of crank and camshaft 5, 6 , the angle of rotation between the two waves can be determined. This angle of rotation can be changed by the adjuster 4 . In this embodiment, the value of the target angle of the engine control unit 1 is forwarded to a second control unit 2 . The second control unit 2 controls an electric motor 3 , which actuates the adjuster 4 . The second control unit 2 for the electric motor 3 includes in the application example, the output stage for controlling the electric motor 3 and the position control of the arrangement. The arrangement shown is a control loop with a control device 7 and a controlled system 9 , wherein the controlled system is the cam and the crankshaft 5, 6 , the rotational angle relation is changed to each other, and the control device is composed of the following components:
  • a setpoint adjuster composed of a plurality of control devices 1, 2 , wherein the setpoint value is generated by the engine control unit 1 , which is transmitted to the control unit 2 , in which the circuit for setpoint adjustment is located.
  • a measuring device, which are formed in the embodiment of the sensors 8a, 8b on the cam or on the crankshaft and alternatively or additionally consist of sensors that detect the position of the electric motor or the adjuster.
  • a comparator, which compares the actual value with the target value, wherein in the application example, this function is also integrated in the control unit 2 .
  • and the actuator, which influences the angle of rotation of the camshaft and which is formed in the application example of 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.
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:

  • 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.
  • einem Vergleicher, der den Istwert mit dem Sollwert vergleicht, wobei im Anwendungsbeispiel diese Funktion gleichfalls im Steuergerät 2 integriert ist.
  • und dem Stellglied, das den Verdrehwinkel der Nockenwelle beeinflusst und das im Anwendungsbeispiel vom Elektromotor 3 und dem Versteller 4 gebildet wird.
FIG. 2 also shows an arrangement in which the setpoint for the control device 7 is specified by the engine controller 1 . Here, however, the target angle is not directly determined and passed on, but it is the target speed for the electric motor 3 determined by the engine control 1 of the internal combustion engine and passed, with which the desired angle of rotation between the crankshaft and camshaft can be adjusted.
This desired speed value serves as a reference value for the control unit 2 , which can simultaneously also process measured values of sensors 8a, 8b which represent the actual value of the controlled variable to the angle of rotation. These sensors 8a, 8b can detect, for example, the position of the camshaft and crankshaft 5, 6 in the controlled system 9. Alternatively or additionally, the instantaneous speed of the electric motor 3 can also be measured and then compared in the control unit 2 with the desired value. The control unit 2 for the electric motor 3 also includes the output stage for controlling the electric motor 3 . However, the position control of the arrangement assumes the engine control 1 , which varies the target speed accordingly until the desired state between cam and crankshaft is reached. However, this position control can also be realized in a different arrangement. Of course, the controller 2 can also take over other functions. The arrangement shown is a control loop with a control device 7 and a controlled system 9, wherein the controlled system is the cam and the crankshaft 5, 6 , the rotational angle relation is changed to each other, and the control device is composed of the following components:
  • a set of several control units 1, 2 setpoint adjuster, wherein the setpoint of the engine control. 1 is generated, which is transmitted to the control unit 2 , which includes the final stage for the electric motor. The position control can in this case be accommodated both in the engine control 1 or in the control unit 2 .
  • a measuring device which is formed in the embodiment of the electric motor 3 in the form of a tachometer and / or are formed by the sensors 8a and 8b from the previous embodiment.
  • a comparator, which compares the actual value with the target value, wherein in the application example, this function is also integrated in the control unit 2 .
  • and the actuator, which influences the angle of rotation of the camshaft and which is formed in the application example of 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 done in the arrangement in different places. In particular, other control devices or devices perform subtasks or subfunctions of the arrangement. Likewise, it is not mandatory that the components listed above are in the same housing. Equivalent to the above-described control to a target rotational speed of the electric motor 3 is the control to a target rotational speed of the adjuster 4 , since the rotational speed of the phaser 4 is directly dependent on the rotational 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 target value for the control device 7 to the control unit 2 as a target current or as a desired torque for the electric motor 3 is predetermined by the engine control unit 1 . This setpoint current or the setpoint torque indirectly determines or changes the angle of rotation between camshaft and crankshaft 6, 7 . The amount of the desired current or torque is specified by the engine control unit. The setpoint from the engine controller 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. Also in this embodiment, the adjuster 4 has a swash plate mechanism which is in communication with the camshaft 5 is, which is driven by the crankshaft 6 . In order to determine the achievement of the desired value in the control unit, current actual values in the electric motor 3 or in the adjuster are detected and made available to the control unit as a comparison value for the desired-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:

  • 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 dieser Sollwert eingestellt werden kann.
  • einer Messeinrichtung, die im Ausführungsbeispiel einen Strom, eine Drehzahl oder ein Drehmoment am Elektromotor oder am Versteller misst, die einen aktuellen Istwert für das Steuergerät 2 zum Vergleich mit dem Sollwert liefert.
  • einem Vergleicher, der den Istwert mit dem Sollwert vergleicht, wobei im Anwendungsbeispiel diese Funktion im Steuergerät 2 integriert ist.
  • und dem Stellglied, das den Verdrehwinkel der Nockenwelle 5 beeinflusst und das im Anwendungsbeispiel vom Elektromotor 3 und dem Versteller 4 gebildet wird.
Again, controls the engine control unit 1 , which determines the desired current or the desired torque, actually the internal combustion engine, which drives the crankshaft 6 . This desired current value or the setpoint torque value serves as a reference value for the control unit 2 , which at the same time also acquires measured values at the electric motor 3 and / or at the stage 4 , which represent the current comparison value to the desired value. Here, the controlled system includes the cam and the crankshaft 5, 6 , whose rotational angle relation is changed to each other by the operating current of the electric motor and thus the torque or the rotational speed of the electric motor or the adjuster is changed. The associated control device consists of the following components:
  • a setpoint adjuster, wherein the setpoint is generated and updated by the engine controller 1 and the setpoint is transmitted to the controller 2 , in which there is the circuit with which this setpoint can be set.
  • a measuring device which measures in the embodiment, a current, a rotational speed or torque on the electric motor or the stage, which provides a current actual value for the control unit 2 for comparison with the reference value.
  • a comparator, which compares the actual value with the target value, wherein in the application example, this function is integrated in the control unit 2 .
  • and the actuator, which influences the angle of rotation of the camshaft 5 and which is formed in the application example of 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 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 done in the arrangement in different places. In particular, other control devices or devices perform subtasks or subfunctions of the arrangement. Likewise, it is not necessary to look at the components listed above in and same housing, but they can also be installed or integrated in various devices that 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 embodiments can be combined in any way, it is only important that the control device has a modular structure.

Claims (12)

  1. Arrangement for adjusting the relative angle of rotation between a camshaft (5) and a crankshaft (6), wherein the arrangement has the following components:
    - a camshaft adjuster (4) which adjusts the angle of rotation of the camshaft (5) with respect to the angle of rotation of the crankshaft (6),
    - an electric motor (3) which drives the camshaft adjuster (5), wherein the rotational speed of the camshaft adjuster (4) is directly dependent on the rotational speed of the electric motor (3),
    - a first control unit (2) for this electric motor (3) for adjusting to a setpoint value,
    characterized in that
    - the first control unit (2) is connected to a second control unit (1) which predefines the setpoint value for the first control unit (2).
  2. Arrangement for adjusting the relative angle of rotation between a camshaft (5) and a crankshaft (6), wherein the arrangement has the following components:
    - a camshaft adjuster (4) which adjusts the angle of rotation of the camshaft (5) with respect to the angle of rotation of the crankshaft (6),
    - an electric motor (3) which drives the camshaft adjuster (5),
    - a first control unit (2) for this electric motor (3) for adjusting to a setpoint value, wherein
    - the first control unit (2) is connected to a second control unit (1) which predefines the setpoint value for the first control unit (2), characterized in that
    - the setpoint value is a rotational speed value.
  3. Arrangement for adjusting the relative angle of rotation between a camshaft (5) and a crankshaft (6), wherein the arrangement has the following components:
    - a camshaft adjuster (4) which adjusts the angle of rotation of the camshaft (5) with respect to the angle of rotation of the crankshaft (6),
    - an electric motor (3) which drives the camshaft adjuster (5),
    - a first control unit (2) for this electric motor (3) for adjusting to a setpoint value, wherein
    - the first control unit (2) is connected to a second control unit (1) which predefines the setpoint value for the first control unit (2), characterized in that
    - the setpoint value is a current value.
  4. Arrangement for adjusting the relative angle of rotation between a camshaft (5) and a crankshaft (6), wherein the arrangement has the following components:
    - a camshaft adjuster (4) which adjusts the angle of rotation of the camshaft (5) with respect to the angle of rotation of the crankshaft (6),
    - an electric motor (3) which drives the camshaft adjuster (5),
    - a first control unit (2) for this electric motor (3) for adjusting to a setpoint value, wherein
    - the first control unit (2) is connected to a second control unit (1) which predefines the setpoint value for the first control unit (2), characterized in that
    - the setpoint value is a torque value.
  5. Arrangement according to one of Patent Claims 1 to 4, characterized in that the second control unit (1) is the engine control unit for the internal combustion engine which drives the camshaft (5).
  6. Arrangement according to one of Claims 1 to 5, having a measuring device (8a, 8b) which acquires the actual value which describes the instantaneous relative angle of rotation, characterized in that the first control unit (2) for the electric motor (3) includes a comparator device which compares the setpoint value with the actual value.
  7. Arrangement according to one of Claims 1 to 5, having a measuring device (8a, 8b) which acquires the actual value which describes the instantaneous angle of rotation, characterized in that the second control unit (1) includes a comparator device which compares the setpoint value with the actual value.
  8. Arrangement according to one of Patent Claims 1 to 5, having a measuring device (8a, 8b) which acquires the actual value which describes the instantaneous relative angle of rotation, characterized in that the arrangement has a comparator device which compares the setpoint value with the actual value and this comparator device is connected to at least one of the two control units (1, 2).
  9. Arrangement according to Patent Claim 6, 7 or 8, having a closed-loop controller which acts on the first control unit (2) until the actual value corresponds to the setpoint value, characterized in that the closed-loop controller is integrated into the first control unit (2).
  10. Arrangement according to Patent Claim 6, 7 or 8, having a closed-loop controller which acts on the first control unit (2) until the actual value corresponds to the setpoint value, characterized in that the closed-loop controller is integrated into the second control unit (1).
  11. Arrangement according to Patent Claim 6, 7 or 8, having a closed-loop controller which acts on the first control unit (2) until the actual value corresponds to the setpoint value, characterized in that the closed-loop controller is integrated into a third control unit.
  12. Arrangement for adjusting the relative angle of rotation between a camshaft (5) and a crankshaft (6), having a measuring device (8a, 8b) which acquires an actual value which describes the instantaneous angle of rotation, and having a closed-loop controller, wherein the arrangement has the following components:
    - a camshaft adjuster (4) which adjusts the angle of rotation of the camshaft (5) with respect to the angle of rotation of the crankshaft (6),
    - an electric motor (3) which drives the camshaft adjuster (5),
    - a first control unit (2) for this electric motor (3) for adjusting to a setpoint value, wherein
    - the first control unit (2) is connected to a second control unit (1) which predefines the setpoint value for the first control unit (2), wherein either
    - the first control unit (2) for the electric motor (3) includes a comparator device which compares the setpoint value with the actual value or wherein
    - the second control unit (1) includes a comparator device which compares the setpoint value with the actual value or wherein
    - the arrangement has a comparator device which compares the setpoint value with the actual value and this comparator device is connected to at least one of the two control units (1, 2), wherein
    - the closed-loop controller acts on the first control unit (2) until the actual value corresponds to the setpoint value,
    - characterized in that the closed-loop controller is integrated into the second control unit (1) or into a third control unit (1).
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)

Application Number Priority Date Filing Date Title
DE10259133A DE10259133A1 (en) 2002-12-18 2002-12-18 Arrangement for adjusting the angle of rotation relationship between the camshaft and crankshaft
DE10259133 2002-12-18
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

Publications (2)

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

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EP03753275A Expired - Lifetime EP1573175B1 (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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US (1) US7146947B2 (en)
EP (1) EP1573175B1 (en)
DE (2) DE10259133A1 (en)
ES (1) ES2302940T3 (en)
WO (1) WO2004057161A1 (en)

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JP4668150B2 (en) * 2006-08-31 2011-04-13 トヨタ自動車株式会社 Variable valve timing device
DE102016218192B3 (en) * 2016-09-22 2018-01-25 Schaeffler Technologies AG & Co. KG Phaser
WO2018054423A1 (en) 2016-09-22 2018-03-29 Schaeffler Technologies AG & Co. KG Adjusting unit of an internal combustion engine
DE102017114173A1 (en) 2017-06-27 2018-12-27 Schaeffler Technologies AG & Co. KG Control unit for an internal combustion engine
DE102019113300B3 (en) 2019-05-20 2020-07-09 Schaeffler Technologies AG & Co. KG Method for operating an electromechanical camshaft adjuster
DE102019118689A1 (en) 2019-07-10 2021-01-14 Schaeffler Technologies AG & Co. KG Internal combustion engine and method for operating an electromechanical camshaft adjuster
DE102021134044B3 (en) 2021-12-21 2023-03-16 Schaeffler Technologies AG & Co. KG Internal combustion engine and method for operating an internal combustion engine

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DE3631733A1 (en) * 1986-09-18 1988-03-24 Kloeckner Humboldt Deutz Ag Device on an internal combustion engine for varying the start of fuel delivery and/or the valve timings
US5209202A (en) * 1992-07-27 1993-05-11 Ford Motor Company Multiple functions cam sensing
US5245968A (en) * 1992-08-04 1993-09-21 Ford Motor Company System to determine cam phase and cylinder identification for a variable cam timing engine
US5218935A (en) * 1992-09-03 1993-06-15 Borg-Warner Automotive Transmission & Engine Components Corporation VCT system having closed loop control employing spool valve actuated by a stepper motor
US5548995A (en) * 1993-11-22 1996-08-27 Ford Motor Company Method and apparatus for detecting the angular position of a variable position camshaft
DE29517755U1 (en) * 1995-11-09 1997-03-13 Fev Motorentech Gmbh & Co Kg Adjustment device for a cam-controlled valve operation on a piston internal combustion engine
US5680837A (en) * 1996-09-17 1997-10-28 General Motors Corporation Planetary cam phaser with worm electric actuator
DE19918095C1 (en) * 1999-04-21 2000-10-12 Siemens Ag Solenoid valve control circuit for inlet and outlet valves in internal combustion engine cylinder
DE10038354C2 (en) * 2000-08-05 2003-03-20 Atlas Fahrzeugtechnik Gmbh Control device for adjusting the angle of rotation of a camshaft
DE10116707B4 (en) * 2001-04-04 2017-01-19 Schaeffler Technologies AG & Co. KG Device for relative rotation of a camshaft relative to a crankshaft of an internal combustion engine

Also Published As

Publication number Publication date
DE10259133A1 (en) 2004-07-01
ES2302940T3 (en) 2008-08-01
US20050252469A1 (en) 2005-11-17
DE50309500D1 (en) 2008-05-08
US7146947B2 (en) 2006-12-12
EP1573175A1 (en) 2005-09-14
WO2004057161A1 (en) 2004-07-08

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