EP0639706A2 - System for the control of an actuator adjusting the air supply of a vehicle engine - Google Patents
System for the control of an actuator adjusting the air supply of a vehicle engine Download PDFInfo
- Publication number
- EP0639706A2 EP0639706A2 EP94112010A EP94112010A EP0639706A2 EP 0639706 A2 EP0639706 A2 EP 0639706A2 EP 94112010 A EP94112010 A EP 94112010A EP 94112010 A EP94112010 A EP 94112010A EP 0639706 A2 EP0639706 A2 EP 0639706A2
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- European Patent Office
- Prior art keywords
- control system
- actuator
- assembly
- accelerator pedal
- module
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—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
- System for controlling an actuator for adjusting the air supply of a motor vehicle engine, with an accelerator pedal, with at least one accelerator pedal position sensor for sensing the current accelerator pedal position and with a first electronic module for processing the signals of the at least one accelerator pedal position sensor and with an actuator for setting the air supply for a motor vehicle engine, with an actuator for actuating the actuator, with a position sensor for sensing the current position of the actuator, with a second electronic module which controls the actuator and evaluates or processes the signals from the position sensor.
- This exemplary list shows that the implementation of various functions either leads to a very complex control device or, due to the possibility of mutual influence, to many devices connected in a very complex manner.
- a disadvantage of such a system is that each module connected to the communication channel or the bus system must have its own interface.
- first and second electronic modules are connected by means of a communication line and that one of the modules is connected to at least one further module via a communication channel.
- This basic system is formed by two modules, the functions assigned to the modules advantageously being divided such that the electrical connection between the modules can be as simple as possible.
- the first assembly is also connected to the accelerator pedal and also establishes the connection to at least one additional assembly via a communication channel or a bus system, while the second assembly carries out the control of the actuator.
- the first assembly connected to the accelerator pedal can centrally control all input signals that influence the actuation of the actuator. These are, on the one hand, the signals generated by the accelerator pedal sensor, which are evaluated directly by the first module, and all other signals, which are generated by other modules (engine control, traction control, speed controller, etc.) and reach the first module via the bus system.
- the first module can easily transmit the signals from the accelerator pedal sensors to the bus system so that they can be used by other modules.
- An important advantage is that only one connection to the bus system is required for the control system according to the invention. An adaptation to different bus systems of different vehicle types is therefore necessary particularly simple way possible by adapting only one interface.
- the essential part of the computing power in particular that required for signal processing in the communication of bus systems, can be assigned to the first module. Since the second assembly connected to the actuator should have the shortest possible supply lines to the actuator actuator and to the position sensor, is usually arranged in the engine compartment, the extreme operating conditions there make the first assembly generally more prone to failure or, at least by comparison, by using less sensitive and more resilient components more expensive than the first assembly. It is therefore advantageous to assign complex functions to the first assembly as far as possible.
- the first assembly can be designed particularly advantageously with regard to cabling effort and interference immunity by the accelerator pedal sensors forming a structural unit with this first assembly.
- the effort to adapt to the respective user requirements can then be easily carried out by adapting an interface. Furthermore, the security is relevant Communication between the first and second modules is not affected by changes, extensions or errors on the bus system.
- the modules connected to the bus system include an engine control which controls the ignition and injection of the motor vehicle engine.
- an engine control system can also generate signals for controlling the actuator, which signals reach the first module via the bus system and, possibly in a processed form, can be sent by the latter to the second module for controlling the actuator via the communication line.
- a particular advantage here is that the current engine operating state is taken into account when controlling the actuator.
- mutual monitoring of the functions of the first and second assemblies can also be provided via the communication line.
- a redundant design of individual functions can also be implemented within each module, for example the redundant evaluation of preferably a plurality of position sensors, for example on the accelerator pedal.
- FIG. 1 shows a second assembly (4) which controls an actuator (7) designed as an actuator to actuate the actuator (6) to adjust the air supply to a motor vehicle engine, not shown.
- a position sensor (8) Connected to the actuator (6) is a position sensor (8) which supplies the second module (4) with signals which represent the current position of the actuator (6).
- the second module (4) is connected to a first module (3) via a communication line (5) designed as a bidirectional data line.
- the first assembly (3) receives signals from at least one sensor (2) connected to an accelerator pedal (1).
- the first module (3) is connected to a further module (10) via a communication channel or to several further modules (10, 11, 12) via a bus system (9).
- a module for engine control (10) which controls in particular the ignition and injection of the motor vehicle engine, as well as further modules (11, 12) that perform special driving state functions, such as traction control, a speed controller and / or an electronically controlled automatic transmission.
- FIG. 2 shows a block diagram of the first assembly (3).
- the signals from two position sensors (2a, 2b) connected to the accelerator pedal (1) are fed to this module.
- the position sensors (2a, 2b) can be used, for example, as two potentiometers or as one Potentiometer and a switch can be designed, the second sensor (2b) being used to monitor the function of the first sensor (2a). It is particularly advantageous with regard to a long service life and low susceptibility to faults if at least one of the accelerator pedal position sensors (2a, 2b) is designed as a contactless sensor.
- the signals from the accelerator pedal position sensors (2a, 2b) are fed to a microcomputer (13a) via signal processing modules (18a, 18b).
- This microcomputer is in data exchange with a communication controller (13b) or takes over (with the corresponding computing power of the microcomputer) this function itself.
- the communication controller (13b) in turn gives and receives data from the communication channel or the bus system (9) via the interface (14b).
- the communication line (5) has a very simple structure and can be controlled directly by the microcomputer (13a) via the interface (14a). Since the interface (14b) is the only connection of the modules (3, 4) to the communication channel or bus system (9), all that is required to adapt these modules (3, 4) to different types of communication channels or bus systems is to adapt the communication controller (13b) and / or the interface (14b) can be made, which means only a comparatively minor effort. The other components of both modules (3, 4), however, can be used universally.
- the module (3) has a voltage supply module (15) for voltage supply or voltage stabilization, which is connected to the vehicle electrical system (16) via the ignition switch (17).
- the second assembly (4) shown in FIG. 3 has a structure comparable to the first assembly (3).
- the central component is a microcomputer (22). This is connected to only one interface module (20) and establishes the data connection to the communication line (5).
- the module (4) receives signals for actuating the actuator (6) via this communication line (5). On the other hand, the module (4) also sends signals about the current position of the actuator (6) to the module (3) via the communication line (5).
- the microcomputer (22) controls and monitors the controllable voltage supply (23) for the actuator (7) for actuating the actuator (6).
- the position sensor (8) connected to the actuator (6) sends signals about the current actuator position to the microcomputer (22) via the signal processing module (19).
- the at least one accelerator pedal position sensor (2, 2a, 2b) sends a signal corresponding to the actuation of the accelerator pedal (1) to the first module (3), which outputs a signal or date corresponding to this signal to the communication channel or the bus system (9). This signal or date is sent to the modules for the engine control (10) and to the modules for the special driving state functions (11, 12).
- the driver's request contained in the accelerator pedal signal is interpreted on the basis of the input data of these functions and is forwarded in a possibly modified form on the communication channel or the bus system.
- This driver request is determined in the engine control module (10) on the basis of characteristic curves or maps or Calculation rules converted into a control signal for setting the actuator (6).
- This request signal is sent via the communication channel or the bus system (9) to the first module (3), which forwards a serial signal corresponding to this request signal via the communication line (5) to the second module (4), which in turn then sends the actuator (7) to the Actuator (6) controls these signals accordingly.
- the position sensor (8) generates a feedback signal about the current position of the actuator (6), which the second module (4) reports back to the first module (3) via the communication line (5) to check the correctness of the actuation of the actuator.
- the assemblies (3, 4) contain tasks that are particularly safety-relevant for the vehicle. Functions for mutual checking can be provided in the programs of the microcomputers (13a, 22) for verifiable safe operation of the vehicle, the modules (3, 4) exchanging test signals via the communication line (5) for the purpose of this check.
- test signals cannot be influenced by the load on the bus system (9).
- Emergency running functions can also be implemented in each of the two modules (3, 4), which enable emergency operation of the vehicle if modules (3, 4, 10) or communication lines (5, 9) fail.
Abstract
Description
System zur Ansteuerung eines Stellgliedes zur Einstellung der Luftzufuhr eines Kraftfahrzeugmotors, mit einem Fahrpedal, mit mindestens einem Fahrpedalpositionssensor zur Sensierung der aktuellen Fahrpedalposition und mit einer ersten elektronischen Baugruppe zur Aufbereitung der Signale des mindestens einen Fahrpedalpositionssensors und mit einem Stellglied zur Einstellung der Luftzufuhr eines Kraftfahrzeugmotors, mit einem Aktuator zur Betätigung des Stellgliedes, mit einem Positionssensor zur Sensierung der aktuellen Position des Stellgliedes, mit einer zweiten elektronischen Baugruppe, welche den Aktuator ansteuert und die Signale des Positionssensors auswertet oder aufbereitet.System for controlling an actuator for adjusting the air supply of a motor vehicle engine, with an accelerator pedal, with at least one accelerator pedal position sensor for sensing the current accelerator pedal position and with a first electronic module for processing the signals of the at least one accelerator pedal position sensor and with an actuator for setting the air supply for a motor vehicle engine, with an actuator for actuating the actuator, with a position sensor for sensing the current position of the actuator, with a second electronic module which controls the actuator and evaluates or processes the signals from the position sensor.
Für Kraftfahrzeuge sind seit langem Systeme zur Ansteuerung eines Stellgliedes zur Einstellung der Luftzufuhr des Fahrzeugmotors bekannt, bei denen die Ansteuerung und Betätigung des Stellgliedes auf elektrischem Wege erfolgt. Hierzu werden zumeist Signale von einem mit dem Fahrpedal verbundenen Sensor einem Steuergerät zugeführt, welches aufgrund dieser Signale einen Stellmotor ansteuert, der ein zumeist als Drosselklappe ausgeführtes Stellglied betätigt. Oftmals ist dabei eine Sensierung und Rückmeldung der Stellgliedposition an das Steuergerät vorgesehen.Systems for controlling an actuator for adjusting the air supply to the vehicle engine have long been known for motor vehicles, in which the actuator is actuated and actuated electrically. For this purpose, signals from a sensor connected to the accelerator pedal are usually fed to a control unit which, on the basis of these signals, controls a servomotor which actuates an actuator which is usually designed as a throttle valve. Sensing and feedback of the actuator position to the control unit is often provided.
In modernen Kraftfahrzeugen sind oft verschiedenartige Geräte, beziehungsweise in Geräte integrierte Funktionen vorgesehen, die die Steuerung des Stellgliedes mit beeinflussen. Dieses sind zum Beispiel Geräte zur Motorsteuerung, die neben Einspritzung und Zündung des Kraftstoffs im Fahrzeugmotor auch die Stellgliedposition beeinflussen. Weiterhin können auch Antriebsschlupfregelungen oder Geschwindigkeitsregler verändernd auf die Stellgliedposition zugreifen.In modern motor vehicles, various types of devices or functions integrated in devices are often provided which also influence the control of the actuator. These are, for example, devices for engine control which, in addition to the injection and ignition of the fuel in the vehicle engine, also influence the actuator position. Furthermore, traction control systems or speed controllers can also access the actuator position by changing them.
Diese beispielhafte Aufzählung zeigt, daß die Verwirklichung verschiedender Funktionen entweder zu einem sehr komplex aufgebauten Steuergerät führt oder, bedingt durch die gegenseitige Beeinflussungsmöglichkeit, zu vielen auf sehr komplexe Weise verschalteten Geräten.This exemplary list shows that the implementation of various functions either leads to a very complex control device or, due to the possibility of mutual influence, to many devices connected in a very complex manner.
Die Entwicklung geht dabei zu einem modular aufgebauten System aus verschiedenen Einzelkomponenten, die über einen Kommunikationskanal oder ein Bussystem verknüpft sind. Hierdurch können anwendungsbezogen mehr oder weniger komplexe Steuerungssysteme aufgebaut werden, ohne daß an der Verkabelung zumindest wesentliche Änderungen vorgenommen werden müßten. Damit ist ein solches System leicht aufbaubar und bei Bedarf auch leicht erweiterungsfähig.The development is towards a modular system made up of various individual components that are linked via a communication channel or a bus system. As a result, more or less complex control systems can be set up based on the application without at least substantial changes having to be made to the cabling. Such a system is therefore easy to set up and can also be easily expanded if necessary.
Nachteilig an einem solchen System ist, daß jede an den Kommunikationskanal oder das Bussystem angeschlossene Baugruppe eine eigene Schnittstelle aufweisen muß.A disadvantage of such a system is that each module connected to the communication channel or the bus system must have its own interface.
Da zudem die in Kraftfahrzeugen verwendeten Kommunikationskanäle oder Bussysteme verschiedenartig ausgeführt sein können und eine einheitliche Normierung nicht existiert, erfordert die Anpassung von einzelnen Baugruppen an verschiedene Kommunikationskanäle oder Bussysteme einen erheblichen Entwicklungsaufwand, wodurch der Aufbau solcher Systeme erheblich verteuert wird.In addition, since the communication channels or bus systems used in motor vehicles can be designed differently and there is no uniform standardization, the adaptation of individual assemblies to different communication channels or bus systems requires considerable development effort, as a result of which the construction of such systems is considerably more expensive.
Es ist daher die Aufgabe der Erfindung ein Grundsystem zur Ansteuerung eines Stellgliedes zu schaffen, das möglichst einfach und kostengünstig aufgebaut, sehr sicher in seiner Funktion und auf möglichst einfache und kostengünstige Weise an verschiedene Arten von Kommunikationskanälen oder Bussystemen anpaßbar ist.It is therefore the object of the invention to provide a basic system for controlling an actuator, which is constructed as simply and inexpensively as possible, is very reliable in its function and can be adapted to various types of communication channels or bus systems in the simplest and cheapest possible way.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die erste und zweite elektronische Baugruppe mittels einer Kommunikationsleitung in Verbindung stehen und daß eine der Baugruppen über einen Kommunikationskanal mit mindestens einer weiteren Baugruppe in Verbindung steht.This object is achieved in that the first and second electronic modules are connected by means of a communication line and that one of the modules is connected to at least one further module via a communication channel.
Hierdurch wird vorteilhafterweise ein besonders einfaches Grundsystem zur Ansteuerung eines Stellgliedes zur Beeinflussung der Luftzufuhr eines Kraftfahrzeugmotors geschaffen, welches sich zudem leicht auf modulare Weise erweitern läßt.This advantageously creates a particularly simple basic system for controlling an actuator for influencing the air supply of a motor vehicle engine, which can also be easily expanded in a modular manner.
Dieses Grundsystem wird von zwei Baugruppen gebildet, wobei die Aufteilung der den Baugruppen zugeordneten Funktionen vorteilhafterweise derart erfolgt, daß die elektrische Verbindung zwischen den Baugruppen möglichst einfach ausgeführt sein kann.This basic system is formed by two modules, the functions assigned to the modules advantageously being divided such that the electrical connection between the modules can be as simple as possible.
Die erste Baugruppe ist weiterhin mit dem Fahrpedal verbunden und stellt außerdem über einen Kommunikationskanal oder ein Bussystem die Verbindung zur wenigstens einer weiteren Baugruppe her, während die zweite Baugruppe die Kontrolle des Stellgliedes durchführt. Eine solche Aufteilung ist besonders zweckmäßig, da sich gleich mehrere Vorteile damit erzielen lassen:The first assembly is also connected to the accelerator pedal and also establishes the connection to at least one additional assembly via a communication channel or a bus system, while the second assembly carries out the control of the actuator. Such a division is particularly useful, since it can achieve several advantages:
Die mit dem Fahrpedal verbundene erste Baugruppe kann zentral alle Eingangssignale kontrollieren, die die Betätigung des Stellgliedes beeinflussen. Dieses sind zum einen die vom Fahrpedalsensor erzeugten Signale, welche direkt von der ersten Baugruppe ausgewertet werden und alle anderen Signale, die von anderen Baugruppen (Motorsteuerung, Antriebsschlupfregelung, Geschwindigkeitsregler usw.) erzeugt werden und über das Bussystem an die erste Baugruppe gelangen.The first assembly connected to the accelerator pedal can centrally control all input signals that influence the actuation of the actuator. These are, on the one hand, the signals generated by the accelerator pedal sensor, which are evaluated directly by the first module, and all other signals, which are generated by other modules (engine control, traction control, speed controller, etc.) and reach the first module via the bus system.
Vorteilhaft ist auch, daß die erste Baugruppe auf einfache Weise die Signale der Fahrpedalsensoren auf das Bussystem geben kann, damit diese von weiteren Baugruppen genutzt werden können.It is also advantageous that the first module can easily transmit the signals from the accelerator pedal sensors to the bus system so that they can be used by other modules.
Ein wichtiger Vorteil ist darin zu sehen, daß für das erfindungsgemäße Ansteuerungssystem nur ein Anschluß an das Bussystem benötigt wird. Daher ist eine Adaption an unterschiedliche Bussysteme verschiedener Fahrzeugtypen auf besonders einfache Weise durch Anpassung von nur einer Schnittstelle möglich.An important advantage is that only one connection to the bus system is required for the control system according to the invention. An adaptation to different bus systems of different vehicle types is therefore necessary particularly simple way possible by adapting only one interface.
Weiterhin ist vorteilhaft, daß der wesentliche Anteil der Rechenleistung, insbesondere die die zur Signalverarbeitung bei der Kommunikation von Bussystemen benötigt wird, der ersten Baugruppe zugeordnet werden kann. Da nämlich die mit dem Stellglied verbundene zweite Baugruppe möglichst kurze Zuleitungen zum Stellgliedaktuator und zum Positionssensor aufweisen soll, üblicherweise im Motorraum angeordnet ist, ist durch die dort herrschenden extremen Betriebsbedingungen die erste Baugruppe im allgemeinen störanfälliger oder durch den Einsatz von unempfindlicheren und belastbareren Bauteilen zumindest vergleichsweise kostenaufwendiger als die erste Baugruppe. Daher ist es vorteilhaft, komplexe Funktionen, soweit möglich, der ersten Baugruppe zuzuordnen.It is also advantageous that the essential part of the computing power, in particular that required for signal processing in the communication of bus systems, can be assigned to the first module. Since the second assembly connected to the actuator should have the shortest possible supply lines to the actuator actuator and to the position sensor, is usually arranged in the engine compartment, the extreme operating conditions there make the first assembly generally more prone to failure or, at least by comparison, by using less sensitive and more resilient components more expensive than the first assembly. It is therefore advantageous to assign complex functions to the first assembly as far as possible.
Besonders vorteilhaft, hinsichtlich Verkabelungsaufwand und Störsicherheit, kann die erste Baugruppe ausgestaltet werden, indem die Fahrpedalsensoren mit dieser ersten Baugruppe eine Baueinheit bilden.The first assembly can be designed particularly advantageously with regard to cabling effort and interference immunity by the accelerator pedal sensors forming a structural unit with this first assembly.
Bezüglich der ersten und zweiten Baugruppe sind vorteilhafte Ausgestaltungen und Weiterbildungen möglich, die sich aus den Unteransprüchen und auch aus der Beschreibung des Ausführungsbeispiels ergeben.With regard to the first and second assemblies, advantageous refinements and developments are possible which result from the subclaims and also from the description of the exemplary embodiment.
So ist es beispielsweise besonders vorteilhaft, die Kommunikation zwischen der ersten und zweiten Baugruppe mit Hilfe der in heutigen Standard-Mikrocontrollern eingebauten seriellen Schnittstelle durchzuführen. Dadurch kann der Aufwand an der zweiten Baugruppe beträchtlich gesenkt werden. Demgegenüber werden bei Bussystemen in der Regel aufwendige Buscontroller verwendet, die zudem noch eine komplexe Software zur Ansteuerung benötigen.For example, it is particularly advantageous to carry out communication between the first and second modules using the serial interface built into today's standard microcontrollers. As a result, the outlay on the second assembly can be considerably reduced. In contrast, complex bus controllers are generally used in bus systems, which also require complex software for control.
Der Aufwand zur Anpassung an die jeweiligen Anwenderwünsche ist dann durch Anpassung einer Schnittstelle leicht durchführbar. Weiterhin ist die sicherheitsrelevante Kommunikation zwischen der ersten und zweiten Baugruppe von Änderungen, Erweiterungen oder Fehlern am Bussystem nicht betroffen.The effort to adapt to the respective user requirements can then be easily carried out by adapting an interface. Furthermore, the security is relevant Communication between the first and second modules is not affected by changes, extensions or errors on the bus system.
Besonders vorteilhaft ist, wenn zu den an das Bussystem angeschlossenen Baugruppen eine Motorsteuerung gehört, welche Zündung und Einspritzung des Kraftfahrzeugmotors steuert. Eine solche Motorsteuerung kann abhängig von Fahrpedalsignalen auch Signale zur Steuerung des Stellgliedes erzeugen, welche über das Bussystem an die erste Baugruppe gelangen und von dieser, eventuell in aufbereiteter Form, über die Kommunikationsleitung an die zweite Baugruppe zur Ansteuerung des Stellgliedes gegeben werden können. Hierbei liegt ein besonderer Vorteil darin, daß der aktuelle Motorbetriebszustand bei der Steuerung des Stellgliedes berücksichtigt wird.It is particularly advantageous if the modules connected to the bus system include an engine control which controls the ignition and injection of the motor vehicle engine. Depending on the accelerator pedal signals, such an engine control system can also generate signals for controlling the actuator, which signals reach the first module via the bus system and, possibly in a processed form, can be sent by the latter to the second module for controlling the actuator via the communication line. A particular advantage here is that the current engine operating state is taken into account when controlling the actuator.
Vorteilhaft ist auch, sowohl in der ersten als auch in der zweiten Baugruppe Überwachungs- und Notsteuerungsfunktionen vorzusehen, welche bei Ausfall oder Fehlfunktionen einer Baugruppe einen Not-Betrieb des Fahrzeuges ermöglicht. Hierzu kann auch eine gegenseitige Überwachung der Funktionen der ersten und zweiten Baugruppe über die Kommunikationsleitung vorgesehen werden. Weiterhin kann auch innerhalb jedes Bausteins eine redundante Auslegung einzelner Funktionen realisiert sein, beispielsweise die redundante Auswertung von vorzugsweise mehreren Positionssensoren, beispielsweise am Fahrpedal.It is also advantageous to provide monitoring and emergency control functions both in the first and in the second module, which enables emergency operation of the vehicle in the event of failure or malfunction of a module. For this purpose, mutual monitoring of the functions of the first and second assemblies can also be provided via the communication line. Furthermore, a redundant design of individual functions can also be implemented within each module, for example the redundant evaluation of preferably a plurality of position sensors, for example on the accelerator pedal.
Ein Ausführungsbeispiel für ein erfindungsgemäßes Ansteuerungssystem ist in der Zeichnung dargestellt und soll im folgenden anhand der Zeichnung näher erläutert werden.An embodiment of a control system according to the invention is shown in the drawing and will be explained in more detail below with reference to the drawing.
Es zeigen:
Figur 1- ein Blockschaltbild eines erfindungsgemäßen Ansteuerungssystems;
Figur 2- ein Blockschaltbild der ersten Baugruppe;
Figur 3- ein Blockschaltbild der zweiten Baugruppe.
- Figure 1
- a block diagram of a control system according to the invention;
- Figure 2
- a block diagram of the first assembly;
- Figure 3
- a block diagram of the second assembly.
Die Figur 1 zeigt eine zweite Baugruppe (4), welche einen als Stellmotor ausgeführten Aktuator (7) zur Betätigung des Stellgliedes (6) zur Einstellung der Luftzufuhr eines nicht dargestellten Kraftfahrzeugmotors ansteuert.FIG. 1 shows a second assembly (4) which controls an actuator (7) designed as an actuator to actuate the actuator (6) to adjust the air supply to a motor vehicle engine, not shown.
Mit dem Stellglied (6) verbunden ist ein Positionssensor (8), welcher der zweiten Baugruppe (4) Signale zuführt, welche die aktuelle Position des Stellgliedes (6) repräsentieren.Connected to the actuator (6) is a position sensor (8) which supplies the second module (4) with signals which represent the current position of the actuator (6).
Die zweite Baugruppe (4) ist über eine als bidirektionale Datenleitung ausgeführte Kommunikationsleitung (5) mit einer ersten Baugruppe (3) verbunden.The second module (4) is connected to a first module (3) via a communication line (5) designed as a bidirectional data line.
Des weiteren erhält die erste Baugruppe (3) Signale von mindestens einem mit einem Fahrpedal (1) verbundenen Sensor (2).Furthermore, the first assembly (3) receives signals from at least one sensor (2) connected to an accelerator pedal (1).
Die erste Baugruppe (3) ist über einen Kommunikationskanal an eine weitere Baugruppe (10) oder über ein Bussystem (9) an mehrere weitere Baugruppen (10, 11, 12) angeschlossen. Dieses sind eine Baugruppe zur Motorsteuerung (10), welche insbesondere die Zündung und die Einspritzung des Kraftfahrzeugmotors steuert, sowie weitere Baugruppen (11, 12) die Fahrzustandssonderfunktionen ausführen, wie zum Beispiel eine Antriebsschlupfregelung, ein Geschwindigkeitsregler und/oder ein elektronisch gesteuertes Automatikgetriebe.The first module (3) is connected to a further module (10) via a communication channel or to several further modules (10, 11, 12) via a bus system (9). These are a module for engine control (10), which controls in particular the ignition and injection of the motor vehicle engine, as well as further modules (11, 12) that perform special driving state functions, such as traction control, a speed controller and / or an electronically controlled automatic transmission.
Der Aufbau der ersten und zweiten Baugruppe soll im folgenden anhand der Figuren 2 und 3 näher erläutert werden.The structure of the first and second assembly will be explained in more detail below with reference to FIGS. 2 and 3.
Die Figur 2 zeigt ein Blockschaltbild der ersten Baugruppe (3). Dieser Baugruppe werden die Signale von zwei mit dem Fahrpedal (1) verbundenen Positionssensoren (2a, 2b) zugeführt. Die Positionssensoren (2a, 2b) können beispielsweise als zwei Potentiometer oder als ein Potentiometer und ein Schalter ausgeführt sein, wobei der zweite Sensor (2b) zur Funktionsüberwachung des ersten Sensors (2a) herangezogen wird. Besonders vorteilhaft bezüglich einer großen Lebensdauer und einer geringen Störanfälligkeit ist es, wenn wenigstens einer der Fahrpedalpositionssensoren (2a, 2b) als kontaktloser Sensor ausgeführt ist.FIG. 2 shows a block diagram of the first assembly (3). The signals from two position sensors (2a, 2b) connected to the accelerator pedal (1) are fed to this module. The position sensors (2a, 2b) can be used, for example, as two potentiometers or as one Potentiometer and a switch can be designed, the second sensor (2b) being used to monitor the function of the first sensor (2a). It is particularly advantageous with regard to a long service life and low susceptibility to faults if at least one of the accelerator pedal position sensors (2a, 2b) is designed as a contactless sensor.
Die Signale der Fahrpedalpositionssensoren (2a, 2b) werden über Signalaufbereitungsbausteine (18a, 18b) einem Mikrocomputer (13a) zugeführt. Dieser Mikrocomputer steht im Datenaustausch mit einem Kommunikationscontroller (13b) bzw. übernimmt (bei entsprechender Rechenleistung des Mikrocomputers) selber diese Funktion.The signals from the accelerator pedal position sensors (2a, 2b) are fed to a microcomputer (13a) via signal processing modules (18a, 18b). This microcomputer is in data exchange with a communication controller (13b) or takes over (with the corresponding computing power of the microcomputer) this function itself.
Der Kommunikationscontroller (13b) wiederum gibt und erhält über die Schnittstelle (14b) Daten von dem Kommunikationskanal oder dem Bussystem (9). Die Kommunikationsleitung (5) ist sehr einfach aufgebaut und kann über die Schnittstelle (14a) direkt vom Mikrocomputer (13a) angesteuert werden. Da die Schnittstelle (14b) die einzige Verbindung der Baugruppen (3, 4) zum Kommunikationskanal oder Bussystem (9) darstellt, muß zur Anpassung dieser Baugruppen (3, 4) an verschiedenartige Kommunikationskanäle oder Bussysteme lediglich eine Anpassung des Kommunikationscontrollers (13b) und/oder der Schnittstelle (14b) vorgenommen werden, was nur einen vergleichsweise geringfügigen Aufwand bedeutet. Die übrigen Bauteile beider Baugruppen (3, 4) sind dagegen universell verwendbar.The communication controller (13b) in turn gives and receives data from the communication channel or the bus system (9) via the interface (14b). The communication line (5) has a very simple structure and can be controlled directly by the microcomputer (13a) via the interface (14a). Since the interface (14b) is the only connection of the modules (3, 4) to the communication channel or bus system (9), all that is required to adapt these modules (3, 4) to different types of communication channels or bus systems is to adapt the communication controller (13b) and / or the interface (14b) can be made, which means only a comparatively minor effort. The other components of both modules (3, 4), however, can be used universally.
Zur Spannungsversorgung bzw. Spannungsstabilisierung weist die Baugruppe (3) einen Spannungsversorgungsbaustein (15) auf, welcher über den Zündschalter (17) an das Fahrzeugbordnetz (16) geschaltet ist.The module (3) has a voltage supply module (15) for voltage supply or voltage stabilization, which is connected to the vehicle electrical system (16) via the ignition switch (17).
Die in der Figur 3 dargestellte zweite Baugruppe (4) weist einen zur ersten Baugruppe (3) vergleichbaren Aufbau auf.The second assembly (4) shown in FIG. 3 has a structure comparable to the first assembly (3).
Auch hier ist der zentrale Baustein ein Mikrocomputer (22). Dieser ist hier mit nur einem Schnittstellenbaustein (20) verbunden und stellt die Datenverbindung zur Kommunikationsleitung (5) her.Here, too, the central component is a microcomputer (22). This is connected to only one interface module (20) and establishes the data connection to the communication line (5).
Über diese Kommunikationsleitung (5) erhält die Baugruppe (4) Signale zur Betätigung des Stellgliedes (6). Andererseits gibt die Baugruppe (4) ebenfalls über die Kommunikationsleitung (5) Signale über die aktuelle Position des Stellgliedes (6) an die Baugruppe (3).The module (4) receives signals for actuating the actuator (6) via this communication line (5). On the other hand, the module (4) also sends signals about the current position of the actuator (6) to the module (3) via the communication line (5).
Zur Betätigung des Stellgliedes (6) steuert und überwacht der Mikrocomputer (22) die steuerbare Spannungsversorgung (23) für den Aktuator (7) zur Betätigung des Stellgliedes (6). Der mit dem Stellglied (6) verbundenen Positionssensor (8) gibt Signale über die aktuelle Stellgliedposition über den Signalaufbereitungsbaustein (19) an den Mikrocomputer (22).To actuate the actuator (6), the microcomputer (22) controls and monitors the controllable voltage supply (23) for the actuator (7) for actuating the actuator (6). The position sensor (8) connected to the actuator (6) sends signals about the current actuator position to the microcomputer (22) via the signal processing module (19).
Zum Abschluß soll die grundlegende Funktionsweise des erfindungsgemäßen Ansteuerungssystems anhand der Zeichnung näher erläutert werden.Finally, the basic functioning of the control system according to the invention will be explained in more detail with reference to the drawing.
Der mindestens eine Fahrpedalpositionssensor (2, 2a, 2b) gibt ein der Betätigung des Fahrpedals (1) entsprechendes Signal an die erste Baugruppe (3), welche ein diesem Signal entsprechendes Signal oder Datum auf den Kommunikationskanal oder das Bussystem (9) gibt. Dieses Signal oder Datum gelangt so an die Baugruppen für die Motorsteuerung (10) und an die Baugruppen für die Fahrzustandssonderfunktionen (11, 12).The at least one accelerator pedal position sensor (2, 2a, 2b) sends a signal corresponding to the actuation of the accelerator pedal (1) to the first module (3), which outputs a signal or date corresponding to this signal to the communication channel or the bus system (9). This signal or date is sent to the modules for the engine control (10) and to the modules for the special driving state functions (11, 12).
In den Baugruppen für Fahrzustandssonderfunktionen (11, 12) werden aufgrund der Eingangsdaten dieser Funktionen der im Fahrpedalsignal enthaltene Fahrerwunsch interpretiert und in möglicherweise modifizierter Form auf dem Kommunikationskanal oder dem Bussystem weitergeleitet. Dieser Fahrerwunsch wird in der Motorsteuerungsbaugruppe (10) anhand von Kennlinien oder Kennfeldern bzw. Rechenvorschriften in ein Ansteuerungssignal zur Einstellung des Stellgliedes (6) umgerechnet.In the modules for special driving state functions (11, 12), the driver's request contained in the accelerator pedal signal is interpreted on the basis of the input data of these functions and is forwarded in a possibly modified form on the communication channel or the bus system. This driver request is determined in the engine control module (10) on the basis of characteristic curves or maps or Calculation rules converted into a control signal for setting the actuator (6).
Dieses Anforderungssignal gelangt über den Kommunikationskanal oder das Bussystem (9) an die erste Baugruppe (3) welche ein diesem Anforderungssignal entsprechendes serielles Signal über die Kommunikationsleitung (5) an die zweite Baugruppe (4) weitergibt, welche wiederum daraufhin den Aktuator (7) des Stellgliedes (6) diesen Signalen entsprechend steuert.This request signal is sent via the communication channel or the bus system (9) to the first module (3), which forwards a serial signal corresponding to this request signal via the communication line (5) to the second module (4), which in turn then sends the actuator (7) to the Actuator (6) controls these signals accordingly.
Der Positionssensor (8) erzeugt ein Rückmeldesignal über die aktuelle Position des Stellgliedes (6), welches die zweite Baugruppe (4) über die Kommunikationsleitung (5) an die erste Baugruppe (3) zur überprüfung der Korrektheit der erfolgten Stellgliedbetätigung zurückmeldet.The position sensor (8) generates a feedback signal about the current position of the actuator (6), which the second module (4) reports back to the first module (3) via the communication line (5) to check the correctness of the actuation of the actuator.
Die Baugruppen (3, 4) beinhalten für das Fahrzeug besonders sicherheitsrelevante Aufgaben. Für einen überprüfbar sicheren Betrieb des Fahrzeugs können in den Programmen der Mikrocomputer (13a, 22) Funktionen zur gegenseitigen Überprüfung vorgesehen sein, wobei die Baugruppen (3, 4) zum Zweck dieser Überprüfung Prüfsignale über die Kommunikationsleitung (5) austauschen.The assemblies (3, 4) contain tasks that are particularly safety-relevant for the vehicle. Functions for mutual checking can be provided in the programs of the microcomputers (13a, 22) for verifiable safe operation of the vehicle, the modules (3, 4) exchanging test signals via the communication line (5) for the purpose of this check.
Von besonderem Vorteil ist es hierbei, daß diese Prüfsignale nicht von der Belastung des Bussystems (9) beeinflußt werden können.It is particularly advantageous here that these test signals cannot be influenced by the load on the bus system (9).
In jeder der beide Baugruppen (3, 4) können zudem Notlauffunktionen implementiert sein, welche bei Ausfall von Baugruppen (3, 4, 10) oder Kommunikationsleitungen (5, 9) einen Notbetrieb des Fahrzeuges ermöglichen.Emergency running functions can also be implemented in each of the two modules (3, 4), which enable emergency operation of the vehicle if modules (3, 4, 10) or communication lines (5, 9) fail.
- 11
- FahrpedalAccelerator pedal
- 2, 2a, 2b2, 2a, 2b
- FahrpedalpositionssensorenAccelerator pedal position sensors
- 33rd
- erste Baugruppefirst assembly
- 44th
- zweite Baugruppesecond assembly
- 55
- KommunikationsleitungCommunication line
- 66
- StellgliedActuator
- 77
- AktuatorActuator
- 88th
- PositionssensorPosition sensor
- 99
- BussystemBus system
- 1010th
- Baugruppe zur MotorsteuerungMotor control assembly
- 11, 1211, 12
- Baugruppen für FahrzustandssonderfunktionenModules for special driving state functions
- 13a13a
- MikrocomputerMicrocomputer
- 13b13b
- KommunikationscontrollerCommunication controller
- 14a, 14b14a, 14b
- SchnittstellenInterfaces
- 1515
- SpannungsversorgungsbausteinPower supply module
- 1616
- FahrzeugbordnetzVehicle electrical system
- 1717th
- ZündschalterIgnition switch
- 18a, 18b, 1918a, 18b, 19
- SignalaufbereitungsbausteineSignal processing modules
- 2020th
- Schnittstelleinterface
- 2121
- SpannungsversorgungsbausteinPower supply module
- 2222
- MikrocomputerMicrocomputer
- 2323
- steuerbare Spannungsversorgungcontrollable power supply
Claims (21)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4327455 | 1993-08-16 | ||
| DE4327455A DE4327455A1 (en) | 1993-08-16 | 1993-08-16 | System for controlling an actuator for adjusting the air supply to a motor vehicle engine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0639706A2 true EP0639706A2 (en) | 1995-02-22 |
| EP0639706A3 EP0639706A3 (en) | 1998-05-13 |
| EP0639706B1 EP0639706B1 (en) | 2000-12-13 |
Family
ID=6495270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94112010A Revoked EP0639706B1 (en) | 1993-08-16 | 1994-08-02 | System for the control of an actuator adjusting the air supply of a vehicle engine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0639706B1 (en) |
| DE (2) | DE4327455A1 (en) |
| ES (1) | ES2154278T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0908611A3 (en) * | 1997-10-06 | 2000-08-23 | Mannesmann VDO Aktiengesellschaft | Method for monitoring target values in an electronic engine control |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19522993A1 (en) * | 1995-06-24 | 1997-01-02 | Abb Daimler Benz Transp | Vehicle guidance system |
| US5673668A (en) * | 1996-08-05 | 1997-10-07 | Ford Global Technologies, Inc. | Method and apparatus for electronic throttle monitoring |
| DE19750736A1 (en) * | 1997-11-15 | 1999-05-20 | Volkswagen Ag | Control system for driver-activated motor vehicle modules |
| JP2003515697A (en) | 1999-11-30 | 2003-05-07 | シーメンス アクチエンゲゼルシヤフト | Control device for internal combustion engine, control unit for adjusting element of internal combustion engine, and control method for internal combustion engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0388107A2 (en) * | 1989-03-17 | 1990-09-19 | Hitachi, Ltd. | Vehicle control apparatus and method therefor |
| US5048481A (en) * | 1989-12-15 | 1991-09-17 | Eaton Corporation | Throttle actuator safety method for automated transmission |
| DE4040219A1 (en) * | 1990-12-15 | 1992-06-17 | Bosch Gmbh Robert | Measurement system for motor vehicle e.g. for accelerator pedal position - has variable end values in electronic control system for more comfortable and reliable operation |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3412318A1 (en) * | 1984-04-03 | 1985-10-10 | Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt | Reference element of a device for adjusting the speed of travel of a vehicle |
| US4779696A (en) * | 1986-07-24 | 1988-10-25 | Mazda Motor Corporation | Vehicle slip control apparatus |
| DE3700986C2 (en) * | 1987-01-15 | 1995-04-20 | Bosch Gmbh Robert | Device for monitoring a computer system with two processors in a motor vehicle |
| EP0285868B2 (en) * | 1987-04-09 | 1995-11-08 | Siemens Aktiengesellschaft | Device for regulating the intake air in a combustion engine |
| DE3814702A1 (en) * | 1987-11-12 | 1989-05-24 | Bosch Gmbh Robert | DEVICE FOR ACTUATING THE THROTTLE VALVE OF AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR A MOTOR VEHICLE |
| DE3803078C2 (en) * | 1988-02-03 | 2000-11-02 | Bosch Gmbh Robert | Method and device for monitoring the position of an electrical actual position transmitter |
| JPH085347B2 (en) * | 1988-04-28 | 1996-01-24 | 三菱電機株式会社 | Vehicle constant-speed traveling device |
| JPH01162055U (en) * | 1988-04-30 | 1989-11-10 | ||
| JP2748488B2 (en) * | 1989-01-18 | 1998-05-06 | 株式会社デンソー | Throttle opening control device |
| JP2855280B2 (en) * | 1990-02-22 | 1999-02-10 | マツダ株式会社 | Vehicle slip control device |
| DE4015415B4 (en) * | 1990-05-14 | 2004-04-29 | Robert Bosch Gmbh | Device for detecting a variable operating parameter |
| DE4120419C2 (en) * | 1990-06-21 | 1995-01-26 | Mazda Motor | Traction control device for a motor vehicle |
| DE4024018A1 (en) * | 1990-07-28 | 1992-01-30 | Bosch Gmbh Robert | Accelerator pedal position indicator - derives position signal from change in resistance of strip which expands as pedal moves |
| DE4037092A1 (en) * | 1990-11-22 | 1992-05-27 | Zahnradfabrik Friedrichshafen | METHOD FOR CONTROLLING THE TORQUE OF AN INTERNAL COMBUSTION ENGINE |
| DE4133268A1 (en) * | 1991-10-08 | 1993-04-15 | Bosch Gmbh Robert | DEVICE FOR CONTROLLING THE DRIVE POWER OF A VEHICLE |
| DE4220247A1 (en) * | 1992-06-20 | 1993-12-23 | Bosch Gmbh Robert | Control device for vehicles |
| DE4220246A1 (en) * | 1992-06-20 | 1993-12-23 | Bosch Gmbh Robert | Control device for vehicle throttle-setting mechanism - has position of throttle indicated by measuring element and stepping counter compared with accelerator pedal position for plausibility check |
-
1993
- 1993-08-16 DE DE4327455A patent/DE4327455A1/en not_active Withdrawn
-
1994
- 1994-08-02 DE DE59409606T patent/DE59409606D1/en not_active Revoked
- 1994-08-02 ES ES94112010T patent/ES2154278T3/en not_active Expired - Lifetime
- 1994-08-02 EP EP94112010A patent/EP0639706B1/en not_active Revoked
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| EP0388107A2 (en) * | 1989-03-17 | 1990-09-19 | Hitachi, Ltd. | Vehicle control apparatus and method therefor |
| US5048481A (en) * | 1989-12-15 | 1991-09-17 | Eaton Corporation | Throttle actuator safety method for automated transmission |
| DE4040219A1 (en) * | 1990-12-15 | 1992-06-17 | Bosch Gmbh Robert | Measurement system for motor vehicle e.g. for accelerator pedal position - has variable end values in electronic control system for more comfortable and reliable operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0908611A3 (en) * | 1997-10-06 | 2000-08-23 | Mannesmann VDO Aktiengesellschaft | Method for monitoring target values in an electronic engine control |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59409606D1 (en) | 2001-01-18 |
| DE4327455A1 (en) | 1995-02-23 |
| EP0639706B1 (en) | 2000-12-13 |
| EP0639706A3 (en) | 1998-05-13 |
| ES2154278T3 (en) | 2001-04-01 |
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