EP0975857B1 - Method for controlling an internal combustion engine - Google Patents

Method for controlling an internal combustion engine Download PDF

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Publication number
EP0975857B1
EP0975857B1 EP98965239A EP98965239A EP0975857B1 EP 0975857 B1 EP0975857 B1 EP 0975857B1 EP 98965239 A EP98965239 A EP 98965239A EP 98965239 A EP98965239 A EP 98965239A EP 0975857 B1 EP0975857 B1 EP 0975857B1
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EP
European Patent Office
Prior art keywords
control unit
engine
actuators
actuator
accordance
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.)
Expired - Lifetime
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EP98965239A
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German (de)
French (fr)
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EP0975857A1 (en
Inventor
Hermann Bäumel
Gunther Breu
Günther ALBERTER
Werner Flierl
Matthias Gramann
Gerhard Hettich
Werner Wiedemann
Wolfgang Thiel
Kurt Maute
Horst Kretschmer
Jürgen Schenk
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Mercedes Benz Group AG
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DaimlerChrysler AG
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    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/18—Packaging of the electronic circuit in a casing
    • 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

Definitions

  • the invention relates to a method for controlling an internal combustion engine with at least two cylinder heads, with an engine control unit and with actuators for electromagnetic valve control.
  • the actuators designed as a separate module for the electromagnetic Valve control consist essentially of a ⁇ ffnermagnet and a closing magnet by at least one housing part with each other are connected.
  • the opening magnet and the closing magnet are electromagnets, each consisting of a coil and a yoke.
  • an anchor plate made of a ferromagnetic material.
  • the anchor plate is going through Energizing the coil of the opening magnet or the coil of the closing magnet moved in that particular direction.
  • the opening magnet has a Passage for a pestle holding the anchor plate with an actuator spring plate combines. Between the Aktorfederteller and the housing part or the outer side of the opening magnet is arranged an actuator spring.
  • An actuator for electromagnetic valve control forms with a gas exchange valve a functional unit, the gas exchange valve, accordingly a conventional cylinder head with camshafts, by means of a valve spring and a valve spring plate in the valve seat of the cylinder head is pulled.
  • a functional unit consisting of an actuator and a gas exchange valve the internal combustion engine mounted, the Aktorfederteller and the Valve spring plate pressed against each other.
  • the anchor plate In the rest position of the functional Unit is the anchor plate exactly in the middle between the opener magnet and the closing magnet.
  • the gas exchange valve is located while in a middle position between the valve seat of the cylinder head, at the valve is closed, and the position in which the valve is maximum is open.
  • the actuators for electromagnetic valve control are advantageous in a device operated at he the actuators in the AktorJ a Aktornos are arranged, and the actuator carrier on the cylinder head the internal combustion engine is screwed.
  • the actuator carrier is from a covered cooled intermediate level.
  • the cooled intermediate level points Feedthroughs for punched grid connections of a stamped grid.
  • the punched grid is injected in a multifunctional plastic part on which a Actuator control unit is arranged, which is connected to the stamped grid.
  • the cooled intermediate level is comprised by a actuator control unit Cover covered.
  • the actuator control unit is connected to an outside the cover arranged engine control unit connected.
  • the invention has for its object a method for controlling a Internal combustion engine with at least two cylinder heads according to the The preamble of claim 1 indicate that the connection of Actuator control unit with the engine control units describes, and that too is suitable for internal combustion engines with multiple cylinder heads.
  • each cylinder head of the internal combustion engine separate actuator control unit for controlling the actuators for electromagnetic Valve control, which by means of a data bus with the Motor control unit are connected.
  • a data bus is preferably the CAN - Data bus used.
  • each cylinder head of the internal combustion engine in addition to the actuators for electromagnetic valve control on other actuators, which also be controlled by the actuator control unit of the cylinder head.
  • the engine control unit controls in particular such functions of the internal combustion engine, the on the interaction of the components of the internal combustion engine based, such as the fuel injection, the Operating cycle of the valves and the firing order.
  • a cruise control system the load detection and a lambda control in the Engine control unit to be integrated.
  • the engine control unit Diagnostic functions of the internal combustion engine adopted.
  • the actuator control units take over the control of the individual functional sequences the actuators for electromagnetic valve control and the other actors.
  • the controller can be easily turned on and off the actuators exist or in complex arrangements that depend on be carried out by sensor data and / or by maps.
  • the control of the actuators for electromagnetic valve control and the other actuators by the actuator control units takes place according to the specification of the engine control unit.
  • the amperage with which the actuators for electromagnetic valve control to open and close the valves are controlled by the respective Aktorbericht réelle regulated.
  • the times at which the gas exchange valves by the Actuators for electromagnetic valve control for the correct working cycle the valves of the internal combustion engine are opened and closed, is specified by the engine control unit.
  • the engine control unit is integrated in one of the actuator control units.
  • the sensors the internal combustion engine, which is used to control the internal combustion engine necessary sensor data, directly with the engine control unit are connected. If necessary, sensor data becomes via the data bus from the engine control unit to the actuator control units forwarded.
  • the Data bus is designed so that an actuator control unit, the sensor data as well can refer from another actuator control unit.
  • the actuator control units have emergency running properties which the internal combustion engine when disturbances occur at least can be operated for a short time.
  • the actuator control devices not only via the data bus and the engine control unit with the engine sensors but are also connected directly with engine sensors Internal combustion engine connected, preferably with the sensors for determination the crankshaft speed and the crankshaft rotation angle.
  • a valve actuator VA is used for each gas exchange valve.
  • the cylinder heads of the gasoline engine each have an actuator holder AH1, AH2 arranged in a form-fitting manner.
  • the actuator holders AH1, AH2 have three cylinders in each case twelve AktorMchte for receiving the valve actuators VA.
  • the Actuator shafts arrange themselves in the actuator holders AH1, AH2 in groups of four around a spark plug shaft.
  • the valve actuators VA are designed as a preassembled module and consists from an opening magnet with a leadthrough and a closing magnet, which are interconnected by a housing part.
  • the Opener magnet and the closing magnet are electromagnets and exist each of a yoke and a coil.
  • An anchor plate made of a ferromagnetic material is arranged.
  • the anchor plate is connected via a plunger with a Aktorfederteller.
  • the plunger is guided by the implementation of the opening magnet.
  • between the Aktorfederteller and the opening magnet is an actuator spring arranged the provision of the anchor plate after this from the Closing magnet was tightened causes.
  • the electrical connections the two coils of the electromagnets of an actuator to the electromagnetic Valve control are led out laterally from the housing part and summarized to a plug device.
  • a valve actuator VA forms a functional unit with a gas exchange valve.
  • the gas exchange valves are each provided by a valve spring via a valve spring plate attached to the valve stem into the valve seat of the cylinder head drawn.
  • in the rest position of a functional unit of one Gas exchange valve and a valve actuator are the Aktorfederteller and the valve spring plate pressed against each other, with the anchor plate exactly in a central position between the opening magnet and the closing magnet located.
  • the valve spring causes the return of the anchor plate in this central position, after the anchor plate from the opening magnet was tightened to open the gas exchange valve.
  • valve actuators VA in the actuator holder AH1, AH2 each have the angle to the bottom surface of the actuator holder AH1, AH2 on that the plunger of a valve actuator VA with the valve stem each gas exchange valve forms a straight line.
  • the plug devices the valve actuators VA are perpendicular to the surface of the Actuator holder AH1, AH2.
  • both actuator holders AH1, AH2 with the valve actuators VA is respectively a cooled intermediate plate arranged as the aluminum plate AP1, AP2 is executed.
  • the aluminum plates AP1, AP2 are cooling water channels incorporated, which are connected to cooling water channels of the actuator holder AH1, AH2 are.
  • the aluminum plates AP1, AP2 have bushings on, via which the plug-in device of the valve actuators VA with the punched grid connections a punched grid are connected.
  • the punched grid are each is poured in a multifunctional plastic part and set the connection between the valve actuators VA of a cylinder head and the associated actuator control unit AS1, AS2.
  • the aluminum plates AP1, AP2, the multifunctional plastic part and a Actuator control unit AS1, AS2 are each enclosed by a cover.
  • the covers are made of plastic and serve as a design carrier of the car manufacturer.
  • the covers each have one Interface on which the actuator control units AS1, AS2 by means of a CAN data bus DB with an engine control unit MS, with engine sensors S and are connected to the power supply UB of the gasoline engine.
  • CAN Controller Area Network
  • the engine control unit MS preferably regulates or controls the sequence of System functions based on the correct interaction of similar (in the six-cylinder partly six-fold existing) assemblies are based, or on the interaction of different assemblies (injection Ignition) of the gasoline engine are based.
  • system functions For example, concern the firing order, the working cycle of the valves and the Fuel injection.
  • the engine control unit MS With connected to a variety of engine sensors. The most important are the Sensors for detecting the crankshaft speed and the crankshaft rotation angle.
  • the Aktorschenzier AS1, AS2 control or control basic functions of Actuators that are assigned to the respective cylinder head. These basic functions are from the actuator controllers AS1, AS2 according to specifications of the engine control unit MS and affect the valve actuators VA and other actuators, such as the solenoid valves for fuel injection and the spark plugs.
  • valve actuators VA for the electromagnetic valve control of the actuator control units AS1, AS2 controlled according to the specification of the engine control unit MS.
  • the specification of the engine control unit MS consists in the specification of the times, when the opening magnet and the closing magnet of the twenty-four Valve actuators VA the intake valves and the exhaust valves of the six Press cylinder of gasoline engine.
  • the optimal times are from the engine control unit MS in dependence of the crankshaft speed and crankshaft rotation angle, load condition and engine temperature certainly.
  • the Aktor concedezier AS1, AS2 regulate for each valve actuator VA, the current that must be spent so that a gas exchange valve, for example, open against the combustion chamber pressure, or pulled at a speed of 0 m / s as possible in the valve seat of the cylinder head.
  • a device is arranged in each valve actuator VA, with which the exact position of the armature between the opening magnet and the closing magnet can be determined in the valve actuator VA.
  • solenoid valves For the fuel injection of the gasoline engine are solenoid valves, the between the fuel pump and the fuel injectors for suppression the fuel injection are arranged, also from the Aktorberichtaus AS1, AS2 controlled according to specification of the engine control unit MS.
  • the engine control unit MS determines the start and the duration of the fuel injection.
  • the course of injection or any pre- or post-injection are controlled by the actuator controllers AS1, AS2.
  • the Actuator control units AS1, AS2 control the flawless current flow Function of the solenoid valves.
  • the ignition device of the gasoline engine is designed as AC ignition and combined with a device for determining the ion current.
  • the actuator control units AS1, AS2 are instructed by the engine control unit MS, which ignites the spark plug of the six-cylinder gasoline engine next.
  • the ignition of a spark plug is triggered by the respective actuator control unit AS1, AS2.
  • the ion current signal is used by the actuator control unit AS1, AS2 to shift the ignition timing as close as possible to TDC and to detect a possible knock signal.
  • the intensity of the spark is controlled by the actuator control units AS1, AS2 speed-dependent.
  • the necessary information about the crankshaft speed and the crankshaft rotation angle receive the actuator controllers AS1, AS2 again via the data bus DB from the engine control unit MS.
  • Be misfires by the ion current measurement on a cylinder is detected by the affected actuator controller AS1, AS2, the solenoid valves locked and thus the fuel supply for this cylinder to Protection of a catalyst prevented.
  • the engine control unit MS and the Aktor horretti AS1, AS2 are for the Failure of individual components of the gasoline engine with special emergency running properties fitted. It should at least be a short-term operation of the gasoline engine, or components such as the Catalyst of the motor vehicle to be protected from damage.
  • valve actuator VA for electromagnetic valve control
  • the car is driven in this case only by three cylinders.
  • the Engine control unit MS has special ignition maps for this case.
  • the actuator control units AS1, AS2 In the event of failure of data transmission between the engine control unit MS and the actuator control units AS1, AS2 are the actuator control units AS1, AS2 own maps for the operating cycle of the valves, the fuel injection and the ignition available. This requires the data transfer between the Aktor horrerien AS1, AS2 functional his.
  • the actuator control units AS1, AS2 have one of the CAN data bus DB independent connection with crankshaft speed sensor and the crankshaft rotation angle, in normal operation of the gasoline engine are the the engine control unit MS and the Aktor horrettin AS1, AS2 supplied signals from the sensors for detecting the crankshaft speed and the crankshaft rotation angle compared and synchronized.
  • the described distribution of system functions on the engine control unit MS and the basic functions on the actuator controllers AS1, AS2 allows a reliable operation of the gasoline engine, wherein the actuator control devices AS1, AS2 an advantageous proximity to the actuators controlled by them have, and the rapid transmission of instructions of the engine control unit to the actuator controllers AS1, AS2 ensured by the data bus DB is.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The invention relates to a method for controlling an internal combustion engine, comprising an engine control device, electromagnetic valve actuators and other actuators, whereby each cylinder head has a separate actuator control device, which are connected to the engine control device.

Description

Die Erfindung betrifft ein Verfahren zur steuerung einer Brennkraftmaschine mit mindestens zwei Zylinderköpfen, mit einem Motorsteuergerät und mit Aktoren zur elektromagnetischen Ventilsteuerung.The invention relates to a method for controlling an internal combustion engine with at least two cylinder heads, with an engine control unit and with actuators for electromagnetic valve control.

Die als separate Baugruppe ausgeführten Aktoren zur elektromagnetischen Ventilsteuerung bestehen im wesentlichen aus einem Öffnermagnet und einem Schließermagnet, die durch mindestens ein Gehäuseteil miteinander verbunden sind. Der Öffnermagnet und der Schließermagnet sind Elektromagneten, die jeweils aus einer spule und einem Joch bestehen. Zwischen dem Öffnermagnet und dem Schließermagnet befindet sich eine Ankerplatte aus einem ferromagnetischen Werkstoff. Die Ankerplatte wird durch Bestromen der Spule des Öffnermagneten oder der Spule des Schließermagneten in dies jeweilige Richtung bewegt. Der Öffnermagnet weist eine Durchführung für einen Stößel auf, der die Ankerplatte mit einem Aktorfederteller verbindet. Zwischen dem Aktorfederteller und dem Gehäuseteil bzw. der Außenseite des Öffnermagneten ist eine Aktorfeder angeordnet.The actuators designed as a separate module for the electromagnetic Valve control consist essentially of a Öffnermagnet and a closing magnet by at least one housing part with each other are connected. The opening magnet and the closing magnet are electromagnets, each consisting of a coil and a yoke. Between the opening magnet and the closing magnet is an anchor plate made of a ferromagnetic material. The anchor plate is going through Energizing the coil of the opening magnet or the coil of the closing magnet moved in that particular direction. The opening magnet has a Passage for a pestle holding the anchor plate with an actuator spring plate combines. Between the Aktorfederteller and the housing part or the outer side of the opening magnet is arranged an actuator spring.

Ein Aktor zur elektromagnetischen Ventilsteuerung bildet mit einem Gaswechselventil eine funktionelle Einheit, wobei das Gaswechselventil, entsprechend einem konventionellen Zylinderkopf mit Nockenwellen, mittels einer Ventilfeder und einem Ventilfederteller in den Ventilsitz des Zylinderkopfes gezogen wird.An actuator for electromagnetic valve control forms with a gas exchange valve a functional unit, the gas exchange valve, accordingly a conventional cylinder head with camshafts, by means of a valve spring and a valve spring plate in the valve seat of the cylinder head is pulled.

ist eine funktionelle Einheit aus einem Aktor und einem Gaswechselventil an der Brennkraftmaschine montiert, werden der Aktorfederteller und der Ventilfederteller gegeneinander gepreßt. In der Ruhelage der funktionellen Einheit befindet sich die Ankerplatte exakt in der Mitte zwischen dem öffnermagnet und dem schließermagnet. Das Gaswechselventil befindet sich dabei in einer Mittelstellung zwischen dem Ventilsitz des Zylinderkopfes, bei der das Ventil geschlossen ist, und der Position, in der das Ventil maximal geöffnet ist. is a functional unit consisting of an actuator and a gas exchange valve the internal combustion engine mounted, the Aktorfederteller and the Valve spring plate pressed against each other. In the rest position of the functional Unit is the anchor plate exactly in the middle between the opener magnet and the closing magnet. The gas exchange valve is located while in a middle position between the valve seat of the cylinder head, at the valve is closed, and the position in which the valve is maximum is open.

Die Aktoren zur elektromagnetischen Ventilsteuerung werden vorteilhaft In einer Vorrichtung betrieben, bei er die Aktoren in den Aktorschächten eines Aktorträgers angeordnet sind, und der Aktorträger auf dem Zylinderkopf der Brennkraftmaschine aufgeschraubt ist. Der Aktorträger wird von einer gekühlten zwischenebene abgedeckt. Die gekühlte Zwischenebene weist Durchführungen für Stanzgitteranschlüsse eines Stanzgitters auf. Das Stanzgitter ist in einem multifunktionalen Kunststoffteil eingespritzt, auf dem ein Aktorsteuergerät angeordnet ist, das mit dem Stanzgitter verbunden ist. Die gekühlte Zwischenebene wird von einem das Aktorsteuergerät umfassenden Abdeckung abgedeckt. Das Aktorsteuergerät ist mit einem außerhalb der Abdeckung angeordneten Motorsteuergerät verbunden.The actuators for electromagnetic valve control are advantageous in a device operated at he the actuators in the Aktorschächten a Aktorträgers are arranged, and the actuator carrier on the cylinder head the internal combustion engine is screwed. The actuator carrier is from a covered cooled intermediate level. The cooled intermediate level points Feedthroughs for punched grid connections of a stamped grid. The punched grid is injected in a multifunctional plastic part on which a Actuator control unit is arranged, which is connected to the stamped grid. The cooled intermediate level is comprised by a actuator control unit Cover covered. The actuator control unit is connected to an outside the cover arranged engine control unit connected.

Der Erfindung liegt die Aufgabe zugrunde ein Verfahren zur Steuerung einer Brennkraftmaschine mit mindestens zwei Zylinderköpfen gemäß dem Oberbegriff des Patentanspruchs 1 anzugeben, das die Verbindung des Aktorsteuergerätes mit den Motorsteuergeräten beschreibt, und das auch für Brennkraftmaschinen mit mehreren Zylinderköpfen geeignet ist.The invention has for its object a method for controlling a Internal combustion engine with at least two cylinder heads according to the The preamble of claim 1 indicate that the connection of Actuator control unit with the engine control units describes, and that too is suitable for internal combustion engines with multiple cylinder heads.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst, wobei Jeder Zylinderkopf der Brennkraftmaschine ein separates Aktorsteuergerät zur Steuerung der Aktoren zur elektromagnetischen Ventilsteuerung aufweist, die mittels eines Datenbusses mit dem Motorsteuergerät verbunden sind. Als Datenbus wird vorzugsweise der CAN - Datenbus verwendet.This object is achieved by the features of the claim 1 solved, wherein each cylinder head of the internal combustion engine separate actuator control unit for controlling the actuators for electromagnetic Valve control, which by means of a data bus with the Motor control unit are connected. As a data bus is preferably the CAN - Data bus used.

Dabei weist vorzugsweise jeder Zylinderkopf der Brennkraftmaschine neben den Aktoren zur elektromagnetischen Ventilsteuerung weitere Aktoren auf, die ebenfalls von dem Aktorsteuergerät des Zylinderkopfes gesteuert werden.In this case, preferably, each cylinder head of the internal combustion engine in addition to the actuators for electromagnetic valve control on other actuators, which also be controlled by the actuator control unit of the cylinder head.

Das Motorsteuergerät steuert insbesondere solche Funktionen der Brennkraftmaschine, die auf dem Zusammenspiel der Baugruppen der Brennkraftmaschine beruhen, wie beispielsweise die Kraftstoffeinspritzung, das Arbeitsspiel der Ventile und die Zündfolge. Zudem können eine Geschwindigkeitsregelanlage, die Lasterkennung und eine Lambdaregelung in dem Motorsteuergerät integriert werden. Außerdem werden von dem Motorsteuergerät Diagnosefunktionen der Brennkraftmaschine übernommen.The engine control unit controls in particular such functions of the internal combustion engine, the on the interaction of the components of the internal combustion engine based, such as the fuel injection, the Operating cycle of the valves and the firing order. In addition, a cruise control system, the load detection and a lambda control in the Engine control unit to be integrated. In addition, from the engine control unit Diagnostic functions of the internal combustion engine adopted.

Die Aktorsteuergeräte übernehmen die steuerung der einzelnen Funktionsabläufe der Aktoren zur elektromagnetischen Ventilsteuerung und der weiteren Aktoren. Die Steuerung kann in einfachen Ein- und Ausschaltvorgängen der Aktoren bestehen oder in komplexen Regelungen, die in Abhängigkeit von sensordaten und/oder von Kennfeldern durchgeführt werden.The actuator control units take over the control of the individual functional sequences the actuators for electromagnetic valve control and the other actors. The controller can be easily turned on and off the actuators exist or in complex arrangements that depend on be carried out by sensor data and / or by maps.

Die Steuerung der Aktoren zur elektromagnetischen Ventilsteuerung und der weiteren Aktoren durch die Aktorsteuergeräte erfolgt gemäß der Vorgabe des Motorsteuergerätes. Beispielsweise wird die Stromstärke, mit der die Aktoren zur elektromagnetischen Ventilsteuerung zum öffnen und schließen der Ventile angesteuert werden, von dem jeweiligen Aktorsteuergerät geregelt. Die Zeitpunkte, zu denen die Gaswechselventile durch die Aktoren zur elektromagnetischen Ventilsteuerung für das korrekte Arbeitsspiel der Ventile der Brennkraftmaschine geöffnet und geschlossen werden, wird von dem Motorsteuergerät vorgegeben.The control of the actuators for electromagnetic valve control and the other actuators by the actuator control units takes place according to the specification of the engine control unit. For example, the amperage with which the actuators for electromagnetic valve control to open and close the valves are controlled by the respective Aktorsteuergerät regulated. The times at which the gas exchange valves by the Actuators for electromagnetic valve control for the correct working cycle the valves of the internal combustion engine are opened and closed, is specified by the engine control unit.

In einer Weiterbildung der Erfindung Ist vorgesehen, daß das Motorsteuergerät in einem der Aktorsteuergeräte integriert wird.In a further development of the invention it is provided that the engine control unit is integrated in one of the actuator control units.

in einer weiteren Weiterbildung der Erfindung ist vorgesehen, daß die Sensoren der Brennkraftmaschine, die die zur Steuerung der Brennkraftmaschine notwendigen Sensordaten erfassen, direkt mit dem Motorsteuergerät verbunden sind. Sofern die Notwendigkeit besteht, werden sensordaten über den Datenbus von dem Motorsteuergerät zu den Aktorsteuergeräten weitergeleitet.In a further development of the invention it is provided that the sensors the internal combustion engine, which is used to control the internal combustion engine necessary sensor data, directly with the engine control unit are connected. If necessary, sensor data becomes via the data bus from the engine control unit to the actuator control units forwarded.

In einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, daß der Datenbus so ausgeführt ist, daß ein Aktorsteuergerät die Sensordaten auch von einem anderen Aktorsteuergerät beziehen kann.In an advantageous embodiment of the invention it is provided that the Data bus is designed so that an actuator control unit, the sensor data as well can refer from another actuator control unit.

In einer weiteren vorteilhaften Weiterbildung der Erfindung Ist vorgesehen, daß die Aktorsteuergeräte über Notlaufeigenschaften verfügen, durch welche die Brennkraftmaschine beim Auftreten von Störungen zumindest kurzzeitig weiter betrieben werden kann.In a further advantageous embodiment of the invention is provided in that the actuator control units have emergency running properties which the internal combustion engine when disturbances occur at least can be operated for a short time.

Zur Bereitstellung dieser Notlaufeigenschaften sind die Aktorsteuergeräte nicht nur über den Datenbus und das Motorsteuergerät mit den Motorsensoren verbunden, sondern werden auch direkt mit Motorsensoren der Brennkraftmaschine verbunden, vorzugsweise mit den Sensoren zur Bestimmung der Kurbelwellendrehzahl und des Kurbelwellendrehwinkels. To provide this emergency running properties are the actuator control devices not only via the data bus and the engine control unit with the engine sensors but are also connected directly with engine sensors Internal combustion engine connected, preferably with the sensors for determination the crankshaft speed and the crankshaft rotation angle.

Zudem ist in einer Weiterbildung der Erfindung vorgesehen, daß Sensordaten, die den Aktorsteuergeräten über den Datenbus und durch direkte Verbindung zu den Motorsensoren zur Verfügung stehen, synchronisiert werden.In addition, it is provided in a development of the invention that sensor data, the actuator control devices via the data bus and by direct Connection to the engine sensors are available, synchronized become.

Bei dem Ausfall von mindestens eines Aktors zur elektromagnetischen Ventilsteuerung wird im Rahmen der Notlaufeigenschaften die Kraftstoffzufuhr für den betroffenen Zylinder durch das zugehörige Aktorsteuergerät gesperrt.In the event of failure of at least one actuator for electromagnetic valve control is in the context of the emergency running properties, the fuel supply locked for the affected cylinder by the associated actuator control unit.

Bei dem Ausfall der Verbindung zwischen einem Aktorsteuergerät und dem Motorsteuergerät übernimmt im Rahmen der Notlaufeigenschaften das betroffene Aktorsteuergerät allein die Steuerung der Aktoren zur elektromagnetischen Ventilsteuerung und der weiteren Aktoren. Die Vorgaben des Motorsteuergerätes zur Steuerung der Funktionen der Aktoren zur elektromagnetischen ventilsteuerung und der weiteren Aktoren werden Kennfeldern entnommen, die in den Aktorsteuergeräten zumindest drehzahlabhängig abgelegt sind. Die Kennfelder betreffen beispielsweise die Zündsteuerung, die Steuerung der Kraftstoffeinspritzung und die Steuerung des Arbeitsspiels der Ventile.In the case of failure of the connection between an actuator control unit and the Engine control unit takes over in the context of the emergency running properties Affected actuator control unit alone, the control of the actuators to the electromagnetic Valve control and the other actuators. The specifications of Motor control unit for controlling the functions of the actuators for electromagnetic valve control and the other actuators are maps taken from that in the Aktorsteuergeräten at least speed-dependent are stored. The maps relate, for example, to the ignition control, the control of the fuel injection and the control of the Working cycle of the valves.

Im folgenden wird das erfindungsgemäße Verfahren zur Steuerung einer Brennkraftmaschine mit mindestens zwei Zylinderköpfen anhand eines Ausführungsbeispiels für eine Sechszylinder Brennkraftmaschine mit zwei zylinderköpfen im Zusammenhang mit einer Figur dargestellt und erläutert.In the following, the inventive method for controlling a Internal combustion engine with at least two cylinder heads based on a Embodiment of a six-cylinder internal combustion engine with two Cylinder heads illustrated and explained in connection with a figure.

Es zeigt:

Figur:
eine schematische Darstellung der Verbindung des Motorsteuergerätes mit zwei Aktorsteuergerätes mittels eines Datenbusses.
It shows:
Figure:
a schematic representation of the connection of the engine control unit with two Aktorsteuergerätes means of a data bus.

Bei einem Ottomotor mit sechs Zylindern für einen Personenkraftwagen (PKW) werden für eine kompakte Bauform des Ottomotors die Zylinder V-förmig angeordnet, wodurch auf dem Motorblock des ottomotors zwei Zylinderköpfe für jeweils drei Zylinder angeordnet sind. Bei den In Vierventiltechnik ausgeführten Zylinderköpfen wird zur elektromagnetischen Ventilsteuerung für jedes Gaswechselventil ein Ventilaktor VA verwendet. Auf den Zylinderköpfen des Ottomotors ist jeweils ein Aktorhalter AH1, AH2 formschlüssig angeordnet. Die Aktorhalter AH1, AH2 weisen für drei zylinder jeweils zwölf Aktorschächte zur Aufnahme der Ventilaktoren VA auf. Die Aktorschächte ordnen sich in den Aktorhaltern AH1, AH2 in Vierergruppen um einen Zündkerzenschacht.In a gasoline engine with six cylinders for a passenger car (PKW) are for a compact design of the gasoline engine, the cylinder V-shaped, resulting in two on the engine block of the ottomotors Cylinder heads are arranged for each three cylinders. In the four-valve technology running cylinder heads is the electromagnetic valve control a valve actuator VA is used for each gas exchange valve. On The cylinder heads of the gasoline engine each have an actuator holder AH1, AH2 arranged in a form-fitting manner. The actuator holders AH1, AH2 have three cylinders in each case twelve Aktorschächte for receiving the valve actuators VA. The Actuator shafts arrange themselves in the actuator holders AH1, AH2 in groups of four around a spark plug shaft.

Die Ventilaktoren VA sind als vormontierte Baugruppe ausgeführt und besteht aus einem Öffnermagnet mit einer Durchführung und einem Schließermagnet, die durch ein Gehäuseteil miteinander verbunden sind. Der öffnermagnet und der Schließermagnet sind Elektromagneten und bestehen jeweils aus einem Joch und einer Spule. zwischen den beiden Magneten ist eine Ankerplatte aus einem ferromagnetischen Werkstoff angeordnet. Die Ankerplatte ist über einen Stößel mit einem Aktorfederteller verbunden. Der Stößel wird dabei durch die Durchführung des Öffnermagneten geführt. zwischen dem Aktorfederteller und dem öffnermagnet ist eine Aktorfeder angeordnet, die die Rückstellung der Ankerplatte, nachdem diese von dem Schließermagneten angezogen wurde, bewirkt. Die elektrischen Anschlüsse der beiden Spulen der Elektromagneten eines Aktors zur elektromagnetischen Ventilsteuerung sind seitlich aus dem Gehäuseteil herausgeführt und zu einer steckvorrichtung zusammengefaßt.The valve actuators VA are designed as a preassembled module and consists from an opening magnet with a leadthrough and a closing magnet, which are interconnected by a housing part. Of the Opener magnet and the closing magnet are electromagnets and exist each of a yoke and a coil. between the two magnets An anchor plate made of a ferromagnetic material is arranged. The anchor plate is connected via a plunger with a Aktorfederteller. The plunger is guided by the implementation of the opening magnet. between the Aktorfederteller and the opening magnet is an actuator spring arranged the provision of the anchor plate after this from the Closing magnet was tightened causes. The electrical connections the two coils of the electromagnets of an actuator to the electromagnetic Valve control are led out laterally from the housing part and summarized to a plug device.

Ein Ventilaktor VA bildet mit einem Gaswechselventil eine funktionelle Einheit. Die Gaswechselventile werden von jeweils einer Ventilfeder über einen am Ventilschaft befestigten Ventilfederteller in den Ventilsitz des Zylinderkopfes gezogen. in der Ruhelage einer funktionellen Einheit aus einem Gaswechselventil und einem Ventilaktor werden der Aktorfederteller und der Ventilfederteller gegeneinander gepreßt, wobei sich die Ankerplatte exakt In einer Mittellage zwischen dem öffnermagneten und dem Schließermagneten befindet. Die Ventilfeder bewirkt die Rückstellung der Ankerplatte in diese Mittellage, nachdem der Ankerteller von dem Öffnermagneten zum öffnen des Gaswechselventil angezogen wurde.A valve actuator VA forms a functional unit with a gas exchange valve. The gas exchange valves are each provided by a valve spring via a valve spring plate attached to the valve stem into the valve seat of the cylinder head drawn. in the rest position of a functional unit of one Gas exchange valve and a valve actuator are the Aktorfederteller and the valve spring plate pressed against each other, with the anchor plate exactly in a central position between the opening magnet and the closing magnet located. The valve spring causes the return of the anchor plate in this central position, after the anchor plate from the opening magnet was tightened to open the gas exchange valve.

Die Aktorschächte, in welche die Ventilaktoren VA in die Aktorhalter AH1, AH2 eingesetzt werden, weisen jeweils die Winkel zur Bodenfläche der Aktorhalter AH1, AH2 auf, daß der Stößel eines Ventilaktors VA mit dem Ventilschaft eines Gaswechselventils jeweils eine Gerade bildet. Die Steckvorrichtungen der Ventilaktoren VA stehen dabei senkrecht zur Oberfläche der Aktorhalter AH1, AH2. The Aktorschächte into which the valve actuators VA in the actuator holder AH1, AH2 are used, each have the angle to the bottom surface of the actuator holder AH1, AH2 on that the plunger of a valve actuator VA with the valve stem each gas exchange valve forms a straight line. The plug devices the valve actuators VA are perpendicular to the surface of the Actuator holder AH1, AH2.

Auf beiden Aktorhaltern AH1, AH2 mit den Ventilaktoren VA wird jeweils eine gekühlte Zwischenplatte angeordnet, die als Aluminlumplatte AP1, AP2 ausgeführt ist. in den Aluminiumplatten AP1, AP2 sind Kühlwasserkanäle eingearbeitet, die mit Kühlwasserkanälen der Aktorhalter AH1, AH2 verbunden sind. Zudem weisen die Aluminiumplatten AP1, AP2 Durchführungen auf, über welche die Steckvorrichtung der Ventilaktoren VA mit den Stanzgitteranschlüssen eines Stanzgitters verbunden sind. Die Stanzgitter sind jeweils ist In einem multifunktionalen Kunststoffteil eingegossen und stellen die Verbindung zwischen den Ventilaktoren VA eines zylinderkopfes und dem zugehörigen Aktorsteuergerät AS1, AS2 dar.On both actuator holders AH1, AH2 with the valve actuators VA is respectively a cooled intermediate plate arranged as the aluminum plate AP1, AP2 is executed. in the aluminum plates AP1, AP2 are cooling water channels incorporated, which are connected to cooling water channels of the actuator holder AH1, AH2 are. In addition, the aluminum plates AP1, AP2 have bushings on, via which the plug-in device of the valve actuators VA with the punched grid connections a punched grid are connected. The punched grid are each is poured in a multifunctional plastic part and set the connection between the valve actuators VA of a cylinder head and the associated actuator control unit AS1, AS2.

Die Aluminiumplatten AP1, AP2, das multifunktionales Kunststoffteil und ein Aktorsteuergerät AS1, AS2 werden jeweils von einer Abdeckung umschlossen. Die Abdeckungen sind aus Kunststoff gefertigt und dienen als Designträger des PKW - Herstellers. Die Abdeckungen weisen jeweils eine Schnittstelle auf, über welche die Aktorsteuergeräte AS1, AS2 mittels einem CAN - Datenbus DB mit einem Motorsteuergerät MS, mit Motorsensoren S sowie mit der Stromversorgung UB des Ottomotors verbunden sind. Der CAN (Controller Area Network) -Datenbus DB dient der Hochgeschwindigkeitsdatenübertragung und ist speziell für den Einsatz in Kraftfahrzeugen entwickelt.The aluminum plates AP1, AP2, the multifunctional plastic part and a Actuator control unit AS1, AS2 are each enclosed by a cover. The covers are made of plastic and serve as a design carrier of the car manufacturer. The covers each have one Interface on which the actuator control units AS1, AS2 by means of a CAN data bus DB with an engine control unit MS, with engine sensors S and are connected to the power supply UB of the gasoline engine. Of the CAN (Controller Area Network) data bus DB is used for high-speed data transmission and is specifically for use in motor vehicles developed.

in der Figur ist in einer schematischen Darstellung die Anordnung des Motorsteuergerätes MS und der zwei Aktorsteuergeräte AS1, AS2 für den sechszylindrigen Ottomotor mit elektromagnetischer Ventilsteuerung dargestellt. Der komplette Datenaustausch zwischen den Aktorsteuergeräten AS1, AS2 und dem Motorsteuergerät MS erfolgt über den CAN - Datenbus DB.in the figure is a schematic representation of the arrangement of the engine control unit MS and the two actuator controllers AS1, AS2 for the six-cylinder Gasoline engine with electromagnetic valve control shown. The complete data exchange between the actuator control units AS1, AS2 and the engine control unit MS takes place via the CAN data bus DB.

Das Motorsteuergerät MS regelt oder steuert vorzugsweise den Ablauf von Systemfunktionen, die auf dem korrekten Zusammenspiel gleichartiger (beim sechszylinder zum Teil sechsfach vorhandener) Baugruppen beruhen, oder auf dem Zusammenwirken unterschiedlicher Baugruppen (Einspritzung - Zündung) des Ottomotors basieren. Diese Systemfunktionen betreffen beispielsweise die Zündfolge, das Arbeitsspiel der Ventile und die Kraftstoffeinspritzung.The engine control unit MS preferably regulates or controls the sequence of System functions based on the correct interaction of similar (in the six-cylinder partly six-fold existing) assemblies are based, or on the interaction of different assemblies (injection Ignition) of the gasoline engine are based. These system functions For example, concern the firing order, the working cycle of the valves and the Fuel injection.

zur Bewältigung dieser Systemfunktionen ist das Motorsteuergerät MS mit einer Vielzahl von Motorsensoren verbunden. Die Wichtigsten sind die Sensoren zur Erkennung der Kurbelwellendrehzahl und des Kurbelwellendrehwinkels.To cope with these system functions, the engine control unit MS with connected to a variety of engine sensors. The most important are the Sensors for detecting the crankshaft speed and the crankshaft rotation angle.

Die Aktorsteuergeräte AS1, AS2 regeln oder steuern Grundfunktionen der Aktoren, die dem jeweiligen Zylinderkopf zugeordnet sind. Diese Grundfunktionen werden von den Aktorsteuergeräten AS1, AS2 nach Vorgaben des Motorsteuergerätes MS ausführt und betreffen die Ventilaktoren VA sowie weitere Aktoren, beispielsweise die Magnetventile zur Kraftstoffeinspritzung und die Zündkerzen.The Aktorsteuergeräte AS1, AS2 control or control basic functions of Actuators that are assigned to the respective cylinder head. These basic functions are from the actuator controllers AS1, AS2 according to specifications of the engine control unit MS and affect the valve actuators VA and other actuators, such as the solenoid valves for fuel injection and the spark plugs.

Für das Arbeitsspiel der Ventile des ottomotors werden die Ventilaktoren VA zur elektromagnetischen Ventilsteuerung von den Aktorsteuergeräten AS1, AS2 nach der Vorgabe des Motorsteuergerätes MS gesteuert.For the working cycle of the valves of the ottomotors the valve actuators VA for the electromagnetic valve control of the actuator control units AS1, AS2 controlled according to the specification of the engine control unit MS.

Die Vorgabe des Motorsteuergerätes MS besteht in der Angabe der Zeitpunkte, wann die Öffnermagneten und die Schließermagneten der vierundzwanzig Ventilaktoren VA die Einlaßventile und die Auslaßventile der sechs Zylinder des Ottomotors betätigen. Die optimalen Zeitpunkte werden von dem Motorsteuergerät MS In Abhängigkeit der Kurbelwellendrehzahl und des Kurbelwellendrehwinkels, des Lastzustandes und der Motortemperatur bestimmt.The specification of the engine control unit MS consists in the specification of the times, when the opening magnet and the closing magnet of the twenty-four Valve actuators VA the intake valves and the exhaust valves of the six Press cylinder of gasoline engine. The optimal times are from the engine control unit MS in dependence of the crankshaft speed and crankshaft rotation angle, load condition and engine temperature certainly.

Die Aktorsteuergeräte AS1, AS2 regeln für jeden Ventilaktor VA die Stromstärke, die aufgewendet werden muß, damit sich ein Gaswechselventil beispielsweise gegen den Brennraumdruck öffnen, oder mit einer Geschwindigkeit von möglichst 0 m/s in den Ventilsitz des Zylinderkopfes gezogen wird. Für diese Regelung ist In jedem Ventilaktor VA eine Vorrichtung angeordnet, mit der im Ventilaktor VA die exakte Position des Ankers zwischen dem Öffnermagneten und dem Schließermagneten bestimmt werden kann.The Aktorsteuergeräte AS1, AS2 regulate for each valve actuator VA, the current that must be spent so that a gas exchange valve, for example, open against the combustion chamber pressure, or pulled at a speed of 0 m / s as possible in the valve seat of the cylinder head. For this regulation, a device is arranged in each valve actuator VA, with which the exact position of the armature between the opening magnet and the closing magnet can be determined in the valve actuator VA.

Für die Kraftstoffeinspritzung des Ottomotors werden Magnetventile, die zwischen der Kraftstoffpumpe und den Kraftstoffinjektoren zur Unterdrükkung der Kraftstoffeinspritzung angeordnet sind, ebenfalls von den Aktorsteuergeräten AS1, AS2 nach Vorgabe des Motorsteuergerätes MS angesteuert. Das Motorsteuergerät MS bestimmt den Beginn und die Dauer der Kraftstoffeinspritzung. Der Einspritzverlauf oder ein eventuelles Vor - oder Nacheinspritzen werden von den Aktorsteuergeräten AS1, AS2 geregelt. Die Aktorsteuergeräte AS1, AS2 kontrollieren am Stromverlauf die einwandfreie Funktion der Magnetventile. For the fuel injection of the gasoline engine are solenoid valves, the between the fuel pump and the fuel injectors for suppression the fuel injection are arranged, also from the Aktorsteuergeräten AS1, AS2 controlled according to specification of the engine control unit MS. The engine control unit MS determines the start and the duration of the fuel injection. The course of injection or any pre- or post-injection are controlled by the actuator controllers AS1, AS2. The Actuator control units AS1, AS2 control the flawless current flow Function of the solenoid valves.

Die Zündvorrichtung des Ottomotors Ist als Wechselstromzündung ausgebildet und mit einer Vorrichtung zur Bestimmung des lonenstromes kombiniert. Für die korrekte Zündfolge werden die Aktorsteuergeräte AS1, AS2 von dem Motorsteuergerät MS angewiesen, welche Zündkerze des sechszylindrigen Ottomotors als nächstes zündet.
Die Zündung einer Zündkerze wird durch das jeweilige Aktorsteuergerät AS1, AS2 ausgelöst. Dabei wird das lonenstromsignal vom Aktorsteuergerät AS1, AS2 dazu genutzt, um den Zündzeitpunkt möglichst nahe nach OT zu verschieben und um ein eventuelles Klopfsignal zu detektieren. Zudem wird die Intensität des Zündfunkens von den Aktorsteuergeräten AS1, AS2 drehzahlabhängig gesteuert. Die dazu notwendige Information über die Kurbelwellendrehzahl und den Kurbelwellendrehwinkel erhalten die Aktorsteuergeräte AS1, AS2 wiederum über den Datenbus DB vom Motorsteuergerät MS.The ignition device of the gasoline engine is designed as AC ignition and combined with a device for determining the ion current. For the correct ignition sequence, the actuator control units AS1, AS2 are instructed by the engine control unit MS, which ignites the spark plug of the six-cylinder gasoline engine next.
The ignition of a spark plug is triggered by the respective actuator control unit AS1, AS2. In this case, the ion current signal is used by the actuator control unit AS1, AS2 to shift the ignition timing as close as possible to TDC and to detect a possible knock signal. In addition, the intensity of the spark is controlled by the actuator control units AS1, AS2 speed-dependent. The necessary information about the crankshaft speed and the crankshaft rotation angle receive the actuator controllers AS1, AS2 again via the data bus DB from the engine control unit MS.

Werden durch die lonenstrommessung an einem Zylinder Zündaussetzer delektiert, wird von dem betroffenen Aktorsteuergerät AS1, AS2 die Magnetventile gesperrt und damit die Kraftstoffzufuhr für diesen Zylinder zum Schutz eines Katalysators unterbunden.Be misfires by the ion current measurement on a cylinder is detected by the affected actuator controller AS1, AS2, the solenoid valves locked and thus the fuel supply for this cylinder to Protection of a catalyst prevented.

Von dem Motorsteuergerät MS werden weitere Funktionen wie die Lasterkennung oder die Lambdaregelung übernommen. zudem sind Sonderfunktionen wie beispielsweise eine Geschwindigkeitsregelanlage und eine Drehzahlbegrenzung im Motorsteuergerät MS integriert. Des weiteren werden von dem Motorsteuergerät MS die Diagnosefunktionen übernommen.From the engine control unit MS are more functions such as the load detection or adopted the lambda control. besides, there are special functions such as a cruise control system and a speed limit integrated in the engine control unit MS. Furthermore, will be taken over by the engine control unit MS, the diagnostic functions.

Das Motorsteuergerät MS und die Aktorsteuergeräte AS1, AS2 sind für den Ausfall einzelner Komponenten des Ottomotors mit speziellen Notlaufeigenschaften ausgestattet. Dabei soll ein zumindest kurzfristiger Weiterbetrieb des Ottomotors ermöglicht werden, oder es sollen Komponenten wie der Katalysator des Kraftfahrzeuges vor einer Beschädigung geschützt werden.The engine control unit MS and the Aktorsteuergeräte AS1, AS2 are for the Failure of individual components of the gasoline engine with special emergency running properties fitted. It should at least be a short-term operation of the gasoline engine, or components such as the Catalyst of the motor vehicle to be protected from damage.

Bei dem Ausfall eines Ventilaktors VA zur elektromagnetischen Ventilsteuerung wird im Rahmen der Notlaufeigenschaften die Kraftstoffeinspritzung der drei Zylinder des betroffenen Zylinderkopfes unterbunden. Das Kraftfahrzeug wird in diesem Fall lediglich von drei Zylindern angetrieben. Das Motorsteuergerät MS verfügt für diesen Fall über spezielle Zündkennfelder.In the event of failure of a valve actuator VA for electromagnetic valve control is in the context of runflat fuel injection prevented the three cylinders of the affected cylinder head. The car is driven in this case only by three cylinders. The Engine control unit MS has special ignition maps for this case.

Für den Fall des Ausfalls der Datenübertragung zwischen dem Motorsteuergerät MS und den Aktorsteuergeräten AS1, AS2 stehen den Aktorsteuergeräten AS1, AS2 eigene Kennfelder für das Arbeitsspiel der Ventile, die Kraftstoffeinspritzung und die Zündung zur Verfügung. Dazu muß die Datenübertragung zwischen den Aktorsteuergeräten AS1, AS2 funktionstüchtig sein. zudem haben die Aktorsteuergeräte AS1, AS2 eine vom CAN - Datenbus DB unabhängige Verbindung mit den sensoren zur Erfassung der Kurbelwellendrehzahl und des Kurbelwellendrehwinkels, im Normalbetrieb des Ottomotors werden die dem Motorsteuergerät MS und den Aktorsteuergeräten AS1, AS2 zugeführten Signale der Sensoren zur Erfassung der Kurbelwellendrehzahl und des Kurbelwellendrehwinkels verglichen und synchronisiert.In the event of failure of data transmission between the engine control unit MS and the actuator control units AS1, AS2 are the actuator control units AS1, AS2 own maps for the operating cycle of the valves, the fuel injection and the ignition available. This requires the data transfer between the Aktorsteuergeräten AS1, AS2 functional his. In addition, the actuator control units AS1, AS2 have one of the CAN data bus DB independent connection with crankshaft speed sensor and the crankshaft rotation angle, in normal operation of the gasoline engine are the the engine control unit MS and the Aktorsteuergeräten AS1, AS2 supplied signals from the sensors for detecting the crankshaft speed and the crankshaft rotation angle compared and synchronized.

Die beschrieben Verteilung der Systemfunktionen auf das Motorsteuergerät MS und der Grundfunktionen auf die Aktorsteuergeräte AS1, AS2 ermöglicht einen zuverlässigen Betrieb des Ottomotors, wobei die Aktorsteuergeräte AS1, AS2 eine vorteilhafte Nähe zu den von ihnen gesteuerten Aktoren aufweisen, und die rasche Übertragung von Anweisungen des Motorsteuergerätes an die Aktorsteuergeräte AS1, AS2 durch den Datenbus DB gewährleistet ist.The described distribution of system functions on the engine control unit MS and the basic functions on the actuator controllers AS1, AS2 allows a reliable operation of the gasoline engine, wherein the actuator control devices AS1, AS2 an advantageous proximity to the actuators controlled by them have, and the rapid transmission of instructions of the engine control unit to the actuator controllers AS1, AS2 ensured by the data bus DB is.

Claims (14)

  1. A method of controlling an internal combustion engine having at least two cylinder heads, incorporating an engine control unit (MS) and actuators for controlling the valves electromagnetically (VA), characterised in that a separate actuator control unit (AS1, AS2) is associated with each cylinder head of the internal combustion engine for controlling the actuators of the electromagnetic valve-control system (VA), and in that the actuator control units (AS1, AS2) are connected via a data bus (DB) to the engine control unit (MS).
  2. A method in accordance with Claim 1, characterised in that, in addition to the actuators for controlling the valves electromagnetically (VA), each cylinder head of the internal combustion engine comprises further actuators which are controlled by the actuator control unit (AS1, AS2) for that cylinder head.
  3. A method in accordance with Claims 1 and 2, characterised in that especially the coordination between the individual modules is controlled by the engine control unit (MS).
  4. A method in accordance with any of the preceding Claims, characterised in that the functioning of the actuators for controlling the valves electromagnetically (VA) and the functioning of the further actuators are controlled by the actuator control units (AS1, AS2).
  5. A method in accordance with any of the preceding Claims, characterised in that instructions for controlling the functioning of the actuators for controlling the valves electromagnetically (VA) and the functioning of the further actuators are issued by the engine control unit (MS) to the actuator control units (AS1, AS2).
  6. A method in accordance with any of the preceding Claims, characterised in that the engine control unit (MS) is integrated into one of the actuator control units (AS1, AS2).
  7. A method in accordance with any of the preceding Claims, characterised in that a CAN-type data bus is used as the data bus.
  8. A method in accordance with any of the preceding Claims, characterised in that the engine sensors of the internal combustion engine are connected to the engine control unit (MS), and in that sensor data is passed over the data bus (DB) to the actuator control units (AS1, AS2) by the engine control unit (MS).
  9. A method in accordance with Claim 8, characterised in that one actuator control unit (AS1, AS2) can draw the sensor data from the engine control unit (MS) or from a further actuator control unit (AS1; AS2).
  10. A method in accordance with any of the preceding Claims, characterised in that emergency-operating properties are allocated to the actuator control units (AS1, AS2) so that the internal combustion engine can continue to run for at least a short period in the event of the occurrence of faults.
  11. A method in accordance with Claim 10, characterised in that engine sensors in the internal combustion engine are additionally connected directly to the actuator control units (AS1, AS2) for making the emergency-operating properties available.
  12. A method in accordance with any of the preceding Claims 8 - 11, characterised in that the items of sensor data, which are made available to an actuator control unit (AS1, AS2) via the data bus (DB) and via a direct connection to the engine sensors (S), are synchronised.
  13. A method in accordance with any of the preceding Claims, characterised in that, in the event of failure of at least one actuator for controlling the valves electromagnetically, the supply of fuel to the affected cylinder is suppressed by the appertaining actuator control unit (AS1, AS2).
  14. A method in accordance with any of the preceding Claims, characterised in that, in the event of failure of the connection between an actuator control unit (AS1, AS2) and the engine control unit (MS), the instructions issued by the engine control unit (MS) for controlling the functioning of the actuators for controlling the valves electromagnetically (VA) and for controlling the functioning of the further actuators in the corresponding cylinder head are derived by the actuator control unit (AS1, AS2) from at least those characteristic fields which are dependent on the rotational speed of the crankshaft and are stored in the respective actuator control unit (AS1, AS2).
EP98965239A 1997-12-18 1998-12-09 Method for controlling an internal combustion engine Expired - Lifetime EP0975857B1 (en)

Applications Claiming Priority (3)

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DE19756342A DE19756342C2 (en) 1997-12-18 1997-12-18 Method for controlling an internal combustion engine
DE19756342 1997-12-18
PCT/EP1998/007987 WO1999032764A1 (en) 1997-12-18 1998-12-09 Method for controlling an internal combustion engine

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EP0975857A1 (en) 2000-02-02
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JP2001512551A (en) 2001-08-21
US6278932B1 (en) 2001-08-21
DE19756342A1 (en) 1999-07-01

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