EP1934468B1 - Method and system for the operation of a heating element of a motor vehicle - Google Patents
Method and system for the operation of a heating element of a motor vehicle Download PDFInfo
- Publication number
- EP1934468B1 EP1934468B1 EP06806758A EP06806758A EP1934468B1 EP 1934468 B1 EP1934468 B1 EP 1934468B1 EP 06806758 A EP06806758 A EP 06806758A EP 06806758 A EP06806758 A EP 06806758A EP 1934468 B1 EP1934468 B1 EP 1934468B1
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- Prior art keywords
- motor vehicle
- sensor signals
- internal combustion
- combustion engine
- confidence value
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
Definitions
- the present invention relates to a method for operating a heating element of a motor vehicle, in particular a glow plug of a self-igniting internal combustion engine of the motor vehicle, in which the heating element is driven in dependence on a plurality of sensor signals.
- the present invention further relates to a system for operating a heating element of a motor vehicle according to the preamble of patent claim 8.
- Such methods and devices are known from the prior art and are used, for example, in self-igniting internal combustion engines to heat a combustion chamber as quickly as possible to a suitable operating temperature before starting the internal combustion engine.
- a sensor signal indicative of the opening of a driver's door of the motor vehicle is evaluated in order to determine a start of a control of the heating element, so that heating of the combustion chamber can already be initiated with the opening of the door.
- This object is achieved in a method of the type mentioned in the present invention, that in dependence on the sensor signals, a confidence value is determined which indicates a probability that the internal combustion engine is started within a predetermined time interval, and that the control of the heating element as a function of Confidence value.
- the determination of the confidence value according to the invention allows a flexible consideration of various sensor signals, for example by applicable and / or dynamically adaptable rules for the formation of the confidence value as a function of the sensor signals, so that in contrast to the conventional method, where fixed predefined states of individual sensor signals or fixed predefined links such sensor signals are evaluated in order to control the heating element, an improved, in particular more precise estimation is possible, whether a start of the internal combustion engine is imminent. In this way, unnecessary heating of the heating element can be avoided and its life can be increased.
- a confidence value can be determined as a function of the sensor signals, indicating a probability that the internal combustion engine will be started within a predefinable time interval, and that the heating element is dependent of the confidence value.
- FIG. 1 schematically shows a self-igniting internal combustion engine 100, which is designed as a glow plug heating element 10 for heating a not in FIG. 1 having illustrated combustion chamber of the internal combustion engine 100.
- the heating element 10 is controlled according to the invention by a system realized in the control unit 30 controlling the internal combustion engine 100.
- the system is embodied, for example, in the form of a computer program which is based on a computer program not in FIG. 1 illustrated arithmetic unit of the control unit 30 is executable.
- the system according to the invention may be in the form of a separate control unit (not shown), which may be in data communication with the control unit 30 of the internal combustion engine 100.
- a data connection can be realized, for example, in the form of a CAN bus 150, via which the control unit 30 is also connected to other, not shown, control devices of the internal combustion engine 100 or of the motor vehicle.
- system according to the invention can also be provided separately in the control unit 30 or separately Circuit arrangement (not shown) for applying a heating current to the heating element 10, which is in FIG. 1 is indicated by the connection 50.
- control unit 30 is supplied with different sensor signals 20a, 20b,..., which are evaluated according to the invention in the manner described below in order to make a statement as to whether startup of the internal combustion engine 100 is imminent and in dependence this statement, if necessary, the heating element 10 to control.
- the confidence value can be achieved, for example, by summation of preferably applicable numerical values, the numerical values in each case being assigned to one of the sensor signals 20a, 20b, .., meaning the respective sensor signal (20a, 20b,%) For the possibility of an imminent start of the Express internal combustion engine 100. That is to say, the confidence value represents, mathematically speaking, a sum of the corresponding sensor signals 20a, 20b,..., Which are weighted with the respective numerical values and which are usually exclusively binary signals.
- a sensor signal indicating the opening of a driver's door may be assigned a higher numerical value than a sensor signal indicating the opening of a trunk, etc.
- the respective numerical value or weighting factor which is assigned to a specific sensor signal 20a, 20b, .., can be calculated as a function of the time which has elapsed between the respective sensor signal entry and a preceding sensor signal entry. That is, the method step 200 from FIG. 2 is divided into a defined but applicable sequence of sensor signals. It is also conceivable, for example, to weight the relevant numerical value as a function of a time duration which lies between a first occurrence of a sensor signal entry such as, for example, unlocking the vehicle door and the occurrence of a subsequent sensor signal entry corresponding to the numerical value.
- the present invention allows a more precise statement about the possibility of an imminent start of the internal combustion engine 100.
- the confidence value according to the present exemplary embodiment of the invention is compared with a predefinable threshold value. This comparison is made in step 210.
- step 220 If the confidence value is greater than the threshold value, according to the invention, an imminent start of the internal combustion engine 100 is concluded, so that the necessity exists of heating the heating element 10 (FIG. FIG. 1 ) to pre-heat the combustion chamber of the internal combustion engine 100 accordingly.
- the process of heating the combustion chamber, also referred to as preheating, is shown in the flow diagram FIG. 2 represented by step 220.
- step 210 results in that the confidence value is smaller than the threshold value, then no activation of the heating element 10 (FIG. FIG. 1 ) performed.
- a subsequent evaluation of the indicative effect of the sensor signals 20a, 20b, .. used with respect to an actual start of the internal combustion engine 100 is possible, and particularly advantageous, for example, the rules for the formation of the confidence value or the threshold value, with the confidence value is compared in step 210, be adjusted depending on such evaluation.
- one or more links are specified for the sensor signals 20a, 20b, and the confidence value is formed or changed as a function of a result of the link or the links.
- the confidence value is formed or changed as a function of a result of the link or the links.
- a first sensor signal which signals an opening of the driver's door of the motor vehicle
- a second sensor signal which signals a closing of the driver's door by a logical AND operation
- a logical AND operation in order to exclude such combinations of sensor signals in the determination of the confidence value , which only very precedently precede the starting of the internal combustion engine 100 with very low probability. That is, if in the given example not both the opening and the subsequent closing of the driver's door have been detected, e.g. neither of the two numerical values of these sensor signals are taken into account in the formation of the confidence value, although possibly one of the two conditions is given. In order nevertheless to obtain a sufficiently high confidence value which exceeds the threshold value, the contribution of further sensor signals to the confidence value would have to be particularly high in such a case, which takes into account the low probability of a start of the internal combustion engine 100 in the present case.
- a confidence value determined by summation of individual numerical values by corresponding negative numerical values can be reduced by a predefinable numerical value.
- the result of a specific logical combination of different sensor signals can be assigned a negative numerical value if a combination of the sensor signals corresponding to the combination reduces the likelihood of a future start of the internal combustion engine 100.
- a sensor signal indicating the opening of the driver's door can be ANDed with a sensor signal indicating the opening of the trunk, and with a true result of this AND combination, the confidence value is reduced by a predefinable numerical value.
- sensor signals 20a, 20b, .. can also be used, for example, which unlock the door of the motor vehicle and / or act on a seat of the vehicle Motor vehicle, in particular a driver's seat, with a weight and / or grasping a steering wheel of the motor vehicle by a person and / or the presence of a person in an interior and / or operating an ignition lock of the motor vehicle and / or operating a brake pedal of the motor vehicle and / or indicate the actuation of a starter or automatic start of the motor vehicle.
- the above-mentioned loading a seat of the motor vehicle with a weight force can be determined for example via an airbag control unit, which is in data communication with the control unit 30, for example via the CAN bus 150.
- the gripping of the steering wheel by a person can be detected, for example, via a capacitive tap of a steering wheel heater, wherein a data exchange with a corresponding control device of the steering wheel heating can also take place via the CAN bus 150.
- the detection of persons in the interior of the motor vehicle can be done for example via so-called keyless entry systems or an immobilizer.
- the actuation of a brake pedal of the motor vehicle can also be determined in a conventional manner via the CAN bus 150.
- the formation of the confidence value in dependence on a release of a driver's door of the motor vehicle and an opening of the driver's door is made. If the driver finally sits down on the driver's seat, which is recognizable as described above, for example via an airbag control unit, the confidence value is further increased by a corresponding numerical value.
- a comparable increase in the confidence value can also be achieved according to the invention by the detection of a person in the vehicle interior by means of a keyless entry system or an immobilizer.
- the confidence value is incrementally increased in accordance with the numerical values assigned to the sensor signals, so that a correspondingly increasing certainty of the assessment of the possibility of an imminent start of the internal combustion engine 100 is made possible.
- the determination or use of the confidence value according to the invention for assessing the probability of an imminent start of the internal combustion engine 100 permits an evaluation that can be adapted to the availability of different sensor signals 20a, 20b,... as well as a change in the rules for the formation of the confidence value, eg a change in the weighting of individual sensor signals 20a, 20b, .. and possibly defined logical operations, whereby also dynamic or adapting to the individual behavior of a driver during the operating time of the system and thus achieving a further increase in precision. Accordingly, when using the method according to the invention less unnecessary heating operations, whereby the heating element 10 is spared.
- a further advantage of the invention is that the precise early detection of an imminent start of the internal combustion engine 100 can be used cost-effective, designed for operation with a supply voltage of 11 volts glow plugs that have no quick start option.
- an advantage of the application of the method according to the invention is that these glow plugs do not need to be operated in a so-called push operation to realize a quick start or a rapid heating, which in turn has a positive effect on the Lifetime of the glow plugs affects.
- the inventive method is not limited to the application in connection with glow plugs; It is also conceivable to operate other heating elements of a motor vehicle as a function of a confidence value determined according to the invention, for example heating elements for fuel systems or catalysts or the like.
- control of systems other than heating systems of a motor vehicle can be controlled with the present method, in which an activation or deactivation before a start of the internal combustion engine is important.
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Betreiben eines Heizelements eines Kraftfahrzeugs, insbesondere einer Glühstiftkerze einer selbstzündenden Brennkraftmaschine des Kraftfahrzeugs, bei dem das Heizelement in Abhängigkeit von mehreren Sensorsignalen angesteuert wird.The present invention relates to a method for operating a heating element of a motor vehicle, in particular a glow plug of a self-igniting internal combustion engine of the motor vehicle, in which the heating element is driven in dependence on a plurality of sensor signals.
Die vorliegende Erfindung betrifft ferner ein System zum Betreiben eines Heizelements eines Kraftfahrzeugs gemäß dem Oberbegriff des Patentanspruchs 8.The present invention further relates to a system for operating a heating element of a motor vehicle according to the preamble of patent claim 8.
Derartige Verfahren und Vorrichtungen sind aus dem Stand der Technik bekannt und dienen beispielsweise bei selbstzündenden Brennkraftmaschinen dazu, vor einem Start der Brennkraftmaschine einen Brennraum möglichst schnell auf eine geeignete Betriebstemperatur aufzuheizen. So wird beispielsweise ein Sensorsignal, das das Öffnen einer Fahrertür des Kraftfahrzeugs angibt, ausgewertet, um einen Beginn einer Ansteuerung des Heizelements festzulegen, so dass eine Aufheizung des Brennraums bereits mit dem Öffnen der Tür angestoßen werden kann.Such methods and devices are known from the prior art and are used, for example, in self-igniting internal combustion engines to heat a combustion chamber as quickly as possible to a suitable operating temperature before starting the internal combustion engine. Thus, for example, a sensor signal indicative of the opening of a driver's door of the motor vehicle is evaluated in order to determine a start of a control of the heating element, so that heating of the combustion chamber can already be initiated with the opening of the door.
Es ist ferner bekannt, nach dem Öffnen der Fahrertür auch deren Schließen auszuwerten oder auch das Signal eines Sensors, der erkennt, dass eine Person auf dem Fahrersitz Platz genommen hat. Durch eine fest vorgegebene Kombination dieser Sensorsignale wird eine zuverlässigere Erkennung eines bevorstehenden Starts der Brennkraftmaschine und damit die Notwendigkeit eines Aufheizens des Brennraums durch das Heizelement realisiert.It is also known, after opening the driver's door to evaluate their closing or the signal of a sensor that detects that a person has taken place in the driver's seat. By a fixed predetermined combination of these sensor signals a more reliable detection of an imminent start of the internal combustion engine and thus the need for heating the combustion chamber is realized by the heating element.
Trotz der vorstehend beschriebenen herkömmlichen Auswertungsmethoden kommt es bei bestehenden Systemen häufig zu Fehlentscheidungen hinsichtlich eines bevorstehenden Starts der Brennkraftmaschine, wodurch Heizelemente unnötig oft angesteuert werden, ohne dass tatsächlich ein Startvorgang der Brennkraftmaschine erfolgt, was zu einer Reduktion der Lebensdauer der Heizelemente führt.Despite the conventional evaluation methods described above, it often comes with existing systems wrong decisions regarding an imminent start of the engine, which heating elements are unnecessarily often driven without actually starting the engine takes place, resulting in a reduction in the life of the heating elements.
Demgemäß ist es Aufgabe der vorliegenden Erfindung, ein Verfahren und ein System der eingangs genannten Art dahingehend zu verbessern, dass eine flexiblere und gleichzeitig zuverlässigere Erkennung eines bevorstehenden Starts der Brennkraftmaschine und eine entsprechende Ansteuerung des Heizelements möglich ist.Accordingly, it is an object of the present invention to improve a method and a system of the type mentioned in that a more flexible and more reliable detection of an impending start of the internal combustion engine and a corresponding control of the heating element is possible.
Diese Aufgabe wird bei einem Verfahren der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass in Abhängigkeit von den Sensorsignalen ein Konfidenzwert ermittelt wird, der eine Wahrscheinlichkeit dafür angibt, dass die Brennkraftmaschine innerhalb eines vorgebbaren Zeitintervalls gestartet wird, und dass die Ansteuerung des Heizelements in Abhängigkeit des Konfidenzwerts erfolgt.This object is achieved in a method of the type mentioned in the present invention, that in dependence on the sensor signals, a confidence value is determined which indicates a probability that the internal combustion engine is started within a predetermined time interval, and that the control of the heating element as a function of Confidence value.
Die erfindungsgemäße Ermittlung des Konfidenzwerts ermöglicht eine flexible Berücksichtigung verschiedener Sensorsignale beispielsweise durch applizierbare und/oder dynamisch anpassbare Regeln zur Bildung des Konfidenzwerts in Abhängigkeit der Sensorsignale, so dass im Gegensatz zu den herkömmlichen Verfahren, bei denen fest vordefinierte Zustände einzelner Sensorsignale bzw. fest vordefinierte Verknüpfungen solcher Sensorsignale ausgewertet werden, um das Heizelement anzusteuern, eine verbesserte, insbesondere präzisere Abschätzung möglich ist, ob ein Start der Brennkraftmaschine bevorsteht. Auf diese Weise können unnötige Aufheizvorgänge des Heizelements vermieden und dessen Lebensdauer dadurch gesteigert werden.The determination of the confidence value according to the invention allows a flexible consideration of various sensor signals, for example by applicable and / or dynamically adaptable rules for the formation of the confidence value as a function of the sensor signals, so that in contrast to the conventional method, where fixed predefined states of individual sensor signals or fixed predefined links such sensor signals are evaluated in order to control the heating element, an improved, in particular more precise estimation is possible, whether a start of the internal combustion engine is imminent. In this way, unnecessary heating of the heating element can be avoided and its life can be increased.
Als eine weitere Lösung der Aufgabe der vorliegenden Erfindung ist bei dem eingangs genannten System vorgeschlagen, dass in Abhängigkeit von den Sensorsignalen ein Konfidenzwert ermittelbar ist, der eine Wahrscheinlichkeit dafür angibt, dass die Brennkraftmaschine innerhalb eines vorgebbaren Zeitintervalls gestartet wird, und dass das Heizelement in Abhängigkeit des Konfidenzwerts ansteuerbar ist.As a further solution of the object of the present invention, it is proposed in the aforementioned system that a confidence value can be determined as a function of the sensor signals, indicating a probability that the internal combustion engine will be started within a predefinable time interval, and that the heating element is dependent of the confidence value.
Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.
Weitere Vorteile, Merkmale und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung verschiedene Ausführungsbeispiele der Erfindung dargestellt sind. Dabei können die in den Ansprüchen und in der Beschreibung erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details will become apparent from the following description in which, with reference to the drawings, various embodiments of the invention are shown. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination.
In der Zeichnung zeigt:
Figur 1- ein Blockschaltbild einer Ausführungsform des erfindungsgemäßen Systems, und
- Figur 2
- ein Flussdiagramm einer Ausführungsform des erfindungsgemäßen Verfahrens.
- FIG. 1
- a block diagram of an embodiment of the system according to the invention, and
- FIG. 2
- a flowchart of an embodiment of the method according to the invention.
Das Heizelement 10 wird erfindungsgemäß durch ein in dem die Brennkraftmaschine 100 steuernden Steuergerät 30 realisiertes System gesteuert. Das System ist beispielsweise in Form eines Computerprogramms ausgebildet, das auf einer nicht in
Alternativ hierzu kann das erfindungsgemäße System in Form eines separaten Steuergeräts (nicht gezeigt) ausgebildet sein, das gegebenenfalls in Datenverbindung mit dem Steuergerät 30 der Brennkraftmaschine 100 steht. Eine solche Datenverbindung kann beispielsweise in Form eines CAN-Bus 150 realisiert sein, über den das Steuergerät 30 auch mit anderen, nicht abgebildeten Steuergeräten der Brennkraftmaschine 100 bzw. des Kraftfahrzeugs verbunden ist.Alternatively, the system according to the invention may be in the form of a separate control unit (not shown), which may be in data communication with the
Zusätzlich kann das erfindungsgemäße System eine ebenfalls in dem Steuergerät 30 oder auch separat vorgesehene Schaltungsanordnung (nicht gezeigt) zum Beaufschlagen des Heizelements 10 mit einem Heizstrom aufweisen, was in
Bei der in
Hierzu wird gemäß dem Flussdiagramm aus
Der Konfidenzwert kann erfindungsgemäß beispielsweise durch Summation von vorzugsweise applizierbaren Zahlenwerten erfolgen, wobei die Zahlenwerte jeweils einem der Sensorsignale 20a, 20b, .. zugeordnet sind, um eine Bedeutung des jeweiligen Sensorsignals (20a, 20b, ..) für die Möglichkeit eines bevorstehenden Starts der Brennkraftmaschine 100 auszudrücken. Das heißt, der Konfidenzwert stellt im mathematischen Sinne eine mit den jeweiligen Zahlenwerten gewichtete Summe der entsprechenden Sensorsignale 20a, 20b, .., bei denen es sich üblicherweise ausschließlich um binäre Signale handelt, dar.According to the invention, the confidence value can be achieved, for example, by summation of preferably applicable numerical values, the numerical values in each case being assigned to one of the
Durch eine entsprechende Wahl der jeweiligen Zahlenwerte, die beispielsweise applizierbar ausgelegt sein können, ist eine flexible Berücksichtigung des tatsächlichen Einflusses der verschiedenen Sensorsignale 20a, 20b, .. auf die Möglichkeit eines bevorstehenden Starts der Brennkraftmaschine 100 möglich.By a suitable choice of the respective numerical values, which can be designed to be applicable, for example, is a flexible consideration of the actual influence the
Insbesondere können unterschiedlich starke Indizwirkungen der Zustände der einzelnen Sensorsignale 20a, 20b, .. für einen bevorstehenden Start der Brennkraftmaschine 100 durch geeignete Wahl des entsprechenden Zahlenwerts berücksichtigt werden, was bei einer starren logischen Verknüpfung mehrerer Sensorsignale, wie sie aus dem Stand der Technik bekannt ist, nicht möglich ist.In particular, different strong indication effects of the states of the
Beispielsweise kann einem Sensorsignal, das das Öffnen einer Fahrertür angibt, ein höherer Zahlenwert zugewiesen werden als einem Sensorsignal, das das Öffnen eines Kofferraums angibt, usw.For example, a sensor signal indicating the opening of a driver's door may be assigned a higher numerical value than a sensor signal indicating the opening of a trunk, etc.
Besonders vorteilhaft kann der jeweilige Zahlenwert bzw. Gewichtungsfaktor, der einem bestimmten Sensorsignal 20a, 20b, .. zugewiesen ist, in Abhängigkeit der Zeit berechnet werden, die zwischen dem jeweiligen Sensorsignaleintrag und einem vorhergehenden Sensorsignaleintrag verstrichen ist. Das heißt, der Verfahrensschritt 200 aus
Die vorliegende Erfindung erlaubt unter Verwendung des Konfidenzwerts eine präzisere Aussage über die Möglichkeit eines bevorstehenden Starts der Brennkraftmaschine 100.Using the confidence value, the present invention allows a more precise statement about the possibility of an imminent start of the
Nach der Bildung des Konfidenzwerts im Schritt 200 wird der Konfidenzwert gemäß dem vorliegenden Ausführungsbeispiel der Erfindung mit einem vorgebbaren Schwellwert verglichen. Dieser Vergleich erfolgt in Schritt 210.After the confidence value has been formed in
Falls der Konfidenzwert größer ist als der Schwellwert, wird erfindungsgemäß auf einen bevorstehenden Start der Brennkraftmaschine 100 geschlossen, so dass die Notwendigkeit besteht, das Heizelement 10 (
Bei einer geeigneten Auswahl der Sensorsignale 20a, 20b, .. sowie der jeweiligen Zahlenwerte, die eine Bedeutung der Sensorsignale 20a, 20b, für die Möglichkeit eines bevorstehenden Starts der Brennkraftmaschine 100 repräsentieren, kann durch die erfindungsgemäße Ermittlung 200 des Konfidenzwerts bereits frühzeitig, insbesondere vor einem Betätigen eines Zündschlosses des Kraftfahrzeugs, auf einen bevorstehenden Start der Brennkraftmaschine 100 geschlossen werden, so dass beim Starten der Brennkraftmaschine 100 keine Wartezeit durch ein unnötig spät erfolgendes Aufheizen des Brennraums entsteht.With a suitable selection of the
Falls die Abfrage aus Schritt 210 (
Gemäß einer besonders vorteilhaften Ausführungsform der vorliegenden Erfindung wird nach der Abfrage 210 beziehungsweise nach dem Ansteuern 220 des Heizelements 10 eine Speicherung 230 der momentanen Sensorsignale 20a, 20b, .. bzw. der jeweiligen Zustände der Sensorsignale 20a, 20b, .. sowie des hieraus ermittelten Konfidenzwerts und der. Information vorgenommen, ob die Brennkraftmaschine 100 tatsächlich gestartet worden ist oder nicht. Durch eine derartige Speicherung dieser Informationen ist eine anschließende Auswertung der Indizwirkung der verwendeten Sensorsignale 20a, 20b, .. hinsichtlich eines tatsächlichen Starts der Brennkraftmaschine 100 möglich, und besonders vorteilhaft können beispielsweise die Regeln zur Bildung des Konfidenzwerts oder auch der Schwellwert, mit dem der Konfidenzwert in Schritt 210 verglichen wird, in Abhängigkeit einer derartigen Auswertung angepasst werden.According to a particularly advantageous embodiment of the present invention, after the
Hierdurch ist ein selbstlernendes Verfahren realisiert, das sich auch an individuelle Gewohnheiten eines Fahrers des Kraftfahrzeugs anpassen kann und eine Ansteuerung des Heizelements 10 mit großer Sicherheit nur dann vornimmt, wenn auch tatsächlich ein Start der Brennkraftmaschine 100 erfolgt.As a result, a self-learning process is realized, which can also adapt to individual habits of a driver of the motor vehicle and a control of the
Bei einer weiteren vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens werden für die Sensorsignale 20a, 20b, eine oder mehrere Verknüpfungen, insbesondere logische Verknüpfungen im Falle binärer Sensorsignale, vorgegeben, und der Konfidenzwert wird in Abhängigkeit eines Ergebnisses der Verknüpfung beziehungsweise der Verknüpfungen gebildet bzw. geändert. Hierdurch ist es im Vergleich zu der rein additiven Bildung des Konfidenzwerts aus den Zahlenwerten der jeweiligen Sensorsignale 20a, 20b, .. besonders vorteilhaft möglich, notwendige Bedingungen beziehungsweise Zustände einzelner Sensorsignale 20a, 20b, .. bei der Bildung des Konfidenzwerts mit einem besonders großen Gewicht zu berücksichtigen.In a further advantageous embodiment of the method according to the invention, one or more links, in particular logical links in the case of binary sensor signals, are specified for the
Beispielsweise ist es möglich, ein erstes Sensorsignal, das ein Öffnen der Fahrertür des-Kraftfahrzeugs signalisiert, mit einem zweiten Sensorsignal, das ein Schließen der Fahrertür signalisiert durch eine logische UND-Verknüpfung zu verknüpfen, um bei der Ermittlung des Konfidenzwerts solche Kombinationen von Sensorsignalen auszuschließen, die nur mit sehr geringer Wahrscheinlichkeit dem Starten der Brennkraftmaschine 100 unmittelbar vorausgehen. D.h., falls bei dem vorgegebenen Beispiel nicht sowohl das Öffnen und das darauffolgende Schließen der Fahrertür erkannt worden sind, wird z.B. keiner der beiden Zahlenwerte dieser Sensorsignale bei der Bildung des Konfidenzwerts berücksichtigt, obwohl möglicherweise eine der beiden Bedingungen gegeben ist. Um dennoch einen hinreichend hohen Konfidenzwert zu erhalten, der den Schwellwert übersteigt, müsste in einem derartigen Fall der Beitrag weiterer Sensorsignale zu dem Konfidenzwert besonders hoch sein, was der vorliegend geringen Wahrscheinlichkeit eines Starts der Brennkraftmaschine 100 Rechnung trägt.For example, it is possible to link a first sensor signal, which signals an opening of the driver's door of the motor vehicle, with a second sensor signal, which signals a closing of the driver's door by a logical AND operation, in order to exclude such combinations of sensor signals in the determination of the confidence value , which only very precedently precede the starting of the
Insbesondere ist es durch eine derartige Einbeziehung von Verknüpfungen beziehungsweise logischen Verknüpfungen auch möglich, einen durch Summation einzelner Zahlenwerte ermittelten Konfidenzwert auch durch entsprechende negative Zahlenwerte zu verringern. Beispielsweise kann dem Ergebnis einer bestimmten logischen Verknüpfung verschiedener Sensorsignale ein negativer Zahlenwert zugewiesen werden, wenn eine der Verknüpfung entsprechende Kombination der Sensorsignale die Wahrscheinlichkeit eines zukünftigen Starts der Brennkraftmaschine 100 verringert. Beispielsweise kann ein das Öffnen der Fahrertür angebendes Sensorsignal mit einem das Öffnen des Kofferraums angebenden Sensorsignal UND-verknüpft werden, und bei einem wahren Ergebnis dieser UND-Verknüpfung wird der Konfidenzwert um einen vorgebbaren Zahlenwert verringert.In particular, by including such links or logic operations, it is also possible to reduce a confidence value determined by summation of individual numerical values by corresponding negative numerical values. For example, the result of a specific logical combination of different sensor signals can be assigned a negative numerical value if a combination of the sensor signals corresponding to the combination reduces the likelihood of a future start of the
Neben den bereits erwähnten Sensorsignalen, die ein Öffnen beziehungsweise Schließen einer Tür und/oder des Kofferraums des Kraftfahrzeugs angeben, können beispielsweise auch Sensorsignale 20a, 20b, .. verwendet werden, die eine Entriegelung einer Tür des Kraftfahrzeugs und/oder das Beaufschlagen eines Sitzes des Kraftfahrzeugs, insbesondere eines Fahrersitzes, mit einer Gewichtskraft und/oder das Ergreifen eines Lenkrads des Kraftfahrzeugs durch eine Person und/oder die Anwesenheit einer Person in einem Innenraum und/oder das Betätigen eines Zündschlosses des Kraftfahrzeugs und/oder das Betätigen eines Bremspedals des Kraftfahrzeugs und/oder das Betätigen eines Starters oder einer Startautomatik des Kraftfahrzeugs angeben.In addition to the sensor signals already mentioned, which indicate opening or closing of a door and / or the boot of the motor vehicle,
Das vorstehend erwähnte Beaufschlagen eines Sitzes des Kraftfahrzeugs mit einer Gewichtskraft kann beispielsweise über ein Airbag-Steuergerät ermittelt werden, das mit dem Steuergerät 30 zum Beispiel über den CAN-Bus 150 in Datenverbindung steht.The above-mentioned loading a seat of the motor vehicle with a weight force can be determined for example via an airbag control unit, which is in data communication with the
Das Ergreifen des Lenkrads durch eine Person ist beispielsweise über einen kapazitiven Abgriff einer Lenkradheizung detektierbar, wobei ein Datenaustausch mit einem entsprechenden Steuergerät der Lenkradheizung ebenfalls über den CAN-Bus 150 erfolgen kann.The gripping of the steering wheel by a person can be detected, for example, via a capacitive tap of a steering wheel heater, wherein a data exchange with a corresponding control device of the steering wheel heating can also take place via the
Die Detektion von Personen in dem Innenraum des Kraftfahrzeugs kann beispielsweise über sogenannte Keyless-Entry-Systeme oder auch eine Wegfahrsperre erfolgen.The detection of persons in the interior of the motor vehicle can be done for example via so-called keyless entry systems or an immobilizer.
Die Betätigung eines Bremspedals des Kraftfahrzeugs ist in herkömmlicher Weise ebenfalls über den CAN-Bus 150 ermittelbar.The actuation of a brake pedal of the motor vehicle can also be determined in a conventional manner via the
Eine besonders zweckmäßige Verknüpfung von Sensorsignalen 20a, 20b, .. gemäß einer weiteren Ausführungsform der vorliegenden Erfindung ist nachstehend angegeben:A particularly expedient combination of
Hierbei wird die Bildung des Konfidenzwerts in Abhängigkeit einer Entriegelung einer Fahrertür des Kraftfahrzeugs und eines Öffnens der Fahrertür vorgenommen. Falls der Fahrer sich schließlich auf den Fahrersitz setzt, was wie vorstehend beschrieben beispielsweise über ein Airbag-Steuergerät erkennbar ist, wird der Konfidenzwert weiter um einen entsprechenden Zahlenwert erhöht. Eine vergleichbare Erhöhung des Konfidenzwerts kann erfindungsgemäß auch durch die Detektion einer Person im Fahrzeuginnenraum mittels eines Keyless-Entry-Systems oder einer Wegfahrsperre erfolgen.In this case, the formation of the confidence value in dependence on a release of a driver's door of the motor vehicle and an opening of the driver's door is made. If the driver finally sits down on the driver's seat, which is recognizable as described above, for example via an airbag control unit, the confidence value is further increased by a corresponding numerical value. A comparable increase in the confidence value can also be achieved according to the invention by the detection of a person in the vehicle interior by means of a keyless entry system or an immobilizer.
Noch eine weitere Steigerung des Konfidenzwerts kann schließlich durch die Erkennung einer Betätigung des Zündschlosses, das Ergreifen des Lenkrads durch eine Person und/oder das Betätigen des Bremspedals erfolgen. Die vorstehend genannte Abfrage, ob ein Bremspedal betätigt wird, ist vorzugsweise nur bei Kraftfahrzeugen mit Automatikgetriebe anwendbar.Finally, a further increase in the confidence value can be achieved by the detection of an actuation of the ignition lock, the gripping of the steering wheel by a person and / or the actuation of the brake pedal. The above-mentioned inquiry as to whether a brake pedal is operated is preferably applicable only to automobiles with automatic transmission.
In Abhängigkeit der einzelnen, vorstehend genannten Sensorsignale wird der Konfidenzwert entsprechend den Sensorsignalen jeweilig zugeordneten Zahlenwerten stufenweise erhöht, so dass eine entsprechend ansteigende Sicherheit der Beurteilung der Möglichkeit eines bevorstehenden Starts der Brennkraftmaschine 100 ermöglicht ist.Depending on the individual sensor signals mentioned above, the confidence value is incrementally increased in accordance with the numerical values assigned to the sensor signals, so that a correspondingly increasing certainty of the assessment of the possibility of an imminent start of the
Die erfindungsgemäße Ermittlung bzw. Verwendung des Konfidenzwerts zur Beurteilung der Wahrscheinlichkeit eines bevorstehenden Starts der Brennkraftmaschine 100 erlaubt eine an die Verfügbarkeit von unterschiedlichen Sensorsignalen 20a, 20b, .. anpassbare Auswertung sowie eine Änderung der Regeln zur Bildung des Konfidenzwerts, z.B. eine Änderung der Gewichtung einzelner Sensorsignale 20a, 20b, .. sowie ggf. definierter logischer Verknüpfungen, wodurch auch dynamisch bzw. zur Betriebszeit des Systems eine Anpassung an ein individuelles Verhalten eines Fahrers möglich und damit eine weitere Steigerung der Präzision erzielbar ist. Demgemäß erfolgen bei der Anwendung des erfindungsgemäßen Verfahrens weniger unnötige Aufheizvorgänge, wodurch das Heizelement 10 geschont wird.The determination or use of the confidence value according to the invention for assessing the probability of an imminent start of the
Ein weiterer Vorteil der Erfindung besteht darin, dass durch die präzise frühzeitige Erkennung eines bevorstehenden Starts der Brennkraftmaschine 100 kostengünstige, zum Betrieb mit einer Versorgungsspannung von 11 Volt ausgelegte Glühstiftkerzen verwendet werden können, die keine Schnellstartmöglichkeit aufweisen.A further advantage of the invention is that the precise early detection of an imminent start of the
Bei dem Einsatz von aufwendigeren Glühstiftkerzen mit einer solchen Schnellstartmöglichkeit besteht ein Vorteil der Anwendung des erfindungsgemäßen Verfahrens darin, dass diese Glühstiftkerzen nicht in einem sog. Push-Betrieb zur Realisierung eines Schnellstarts bzw. eines schnellen Aufheizens betrieben werden müssen, was sich wiederum positiv auf die Lebensdauer der Glühstiftkerzen auswirkt.When using more expensive glow plugs with such a quick start option, an advantage of the application of the method according to the invention is that these glow plugs do not need to be operated in a so-called push operation to realize a quick start or a rapid heating, which in turn has a positive effect on the Lifetime of the glow plugs affects.
Das erfindungsgemäße Verfahren ist nicht auf die Anwendung im Zusammenhang mit Glühstiftkerzen beschränkt; ebenso ist es denkbar, andere Heizelemente eines Kraftfahrzeugs in Abhängigkeit eines erfindungsgemäß ermittelten Konfidenzwerts zu betreiben, beispielsweise Heizelemente für Kraftstoffsysteme oder Katalysatoren oder dergleichen.The inventive method is not limited to the application in connection with glow plugs; It is also conceivable to operate other heating elements of a motor vehicle as a function of a confidence value determined according to the invention, for example heating elements for fuel systems or catalysts or the like.
Generell kann mit dem vorliegenden Verfahren auch die Ansteuerung anderer Systeme als Heizsysteme eines Kraftfahrzeugs gesteuert werden, bei denen eine Aktivierung oder auch Deaktivierung vor einem Start der Brennkraftmaschine von Bedeutung ist.In general, the control of systems other than heating systems of a motor vehicle can be controlled with the present method, in which an activation or deactivation before a start of the internal combustion engine is important.
Claims (10)
- Method for operating a heating element (10) of a motor vehicle, in particular a sheathed-element glow plug of a compression-ignition internal combustion engine (100) of a motor vehicle, in which the heating element (10) is actuated as a function of a plurality of sensor signals (20a, 20b, ...),
characterized in that a confidence value which indicates a probability of the internal combustion engine (100) being started within a predefinable time interval is determined as a function of the sensor signals (20a, 20b, ...), and in that the actuation of the heating element (10) takes place as a function of the confidence value. - Method according to Claim 1, characterized in that a numerical value which can be applied with preference is assigned to each of the sensor signals (20a, 20b, ...), and in that the confidence value is obtained by summing the numerical values of the individual sensor signals (20a, 20b, ...), wherein chronological weighting of the numerical values preferably also takes place.
- Method according to one of the preceding claims, characterized in that one or more operations, in particular logic operations, are predefined for sensor signals (20a, 20b, ...) and in that the confidence value is changed as a function of a result of the operation or operations.
- Method according to one of the preceding claims, characterized in that sensor signals (20a, 20b, ...) are used which specify- unlocking of a door of the motor vehicle and/or- the opening and/or closing of a door and/or of the luggage space of the motor vehicle and/or- the application of a weight to a seat of the motor vehicle, in particular a driver's seat, and/or- the gripping of a steering of the motor vehicle by a person and/or- the presence of a person in a passenger compartment of the motor vehicle and/or- the activation of an ignition lock of the motor vehicle and/or- the activation of a brake pedal of the motor vehicle and/or- the activation of a starter or of an automatic starting device of the motor vehicle.
- Method according to one of the preceding claims, characterized in that the confidence value is compared with a predefinable threshold value.
- Method according to one of the preceding claims, characterized in that sensor signals (20a, 20b, ...) and confidence values which are determined for the sensor signals as well as starting processes of the internal combustion engine (100) which have possibly taken place are stored.
- Method according to Claim 6, characterized in that numerical values which are assigned to means for determining the confidence value and/or the sensor signals (20a, 20b, ...) are modified as a function of the stored sensor signals (20a, 20b, ...) or of the corresponding stored confidence values and/or starting processes of the internal combustion engine (100).
- System for operating a heating element (10) of a motor vehicle, in particular of a sheathed-element glow plug of a compression-ignition internal combustion engine (100) of the motor vehicle, wherein the heating element (10) is actuated as a function of a plurality of sensor signal (20a, 20b, ...), characterized in that a confidence value which indicates a probability of the internal combustion engine (100) being started within a predefinable time interval is determined as a function of the sensor signals (20a, 20b, ...), and in that the heating element (10) is actuated as a function of the confidence value.
- System according to Claim 8, characterized in that the system carries out the method according to one of Claims 1 to 7.
- System according to one of Claims 8 or 9, characterized in that the system is implemented at least partially in a control unit (30), in particular in the form of a computer programme, which controls the internal combustion engine (100) and can be run on a computing unit of the control unit (30).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005045231A DE102005045231A1 (en) | 2005-09-22 | 2005-09-22 | Method and system for operating a heating element of a motor vehicle |
| PCT/EP2006/066063 WO2007033906A1 (en) | 2005-09-22 | 2006-09-06 | Method and system for the operation of a heating element of a motor vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1934468A1 EP1934468A1 (en) | 2008-06-25 |
| EP1934468B1 true EP1934468B1 (en) | 2009-12-02 |
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ID=37420931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06806758A Not-in-force EP1934468B1 (en) | 2005-09-22 | 2006-09-06 | Method and system for the operation of a heating element of a motor vehicle |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1934468B1 (en) |
| AT (1) | ATE450709T1 (en) |
| DE (2) | DE102005045231A1 (en) |
| ES (1) | ES2336370T3 (en) |
| WO (1) | WO2007033906A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2466275A (en) * | 2008-12-18 | 2010-06-23 | Gm Global Tech Operations Inc | Controlling Diesel engine glow plugs |
| DE102010038337A1 (en) | 2010-07-23 | 2012-01-26 | Robert Bosch Gmbh | Method and device for controlling the glow behavior of a glow plug of an internal combustion engine |
| EP2489864B1 (en) * | 2011-02-18 | 2021-07-14 | Fiat Group Automobiles S.p.A. | Diesel fuel injection system in a motor vehicle provided with a diesel engine |
| FR2979604B1 (en) * | 2011-09-06 | 2013-10-04 | Peugeot Citroen Automobiles Sa | ARBITRATION STRATEGY FOR STARTING A DIESEL ENGINE |
| FR2979603B1 (en) * | 2011-09-06 | 2013-10-04 | Peugeot Citroen Automobiles Sa | STRATEGY FOR PREPARING TO START A DIESEL ENGINE |
| FR3002984B1 (en) * | 2013-03-05 | 2015-04-03 | Peugeot Citroen Automobiles Sa | MOTOR VEHICLE HEAT ENGINE LUBRICATING OIL CIRCUIT PRESSING DEVICE |
| DE102014001381A1 (en) * | 2014-02-01 | 2015-08-06 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Heating device for a drive unit in a motor vehicle and method for controlling such a heating device |
| DE102016201559A1 (en) * | 2016-02-02 | 2017-08-03 | Robert Bosch Gmbh | Method and device for measuring a system to be tested |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835273A (en) * | 1981-08-27 | 1983-03-01 | Nippon Denso Co Ltd | Engine preheating control method |
| DE4121520C2 (en) * | 1990-07-07 | 2003-02-13 | Volkswagen Ag | Circuit arrangement for preheating ignition devices in the manner of glow plugs for an internal combustion engine driving a motor vehicle |
| DE4223954C1 (en) * | 1992-07-21 | 1994-01-13 | Bosch Gmbh Robert | Heating element controller for automobile engine - responds to sensor signals indicating seat belt closure, occupation of vehicle driving seat, or closure of all vehicle doors. |
| DE19519713A1 (en) * | 1995-05-30 | 1996-12-05 | Bosch Gmbh Robert | Method and device for controlling a heating element in a motor vehicle |
| DE19906950C2 (en) * | 1999-02-19 | 2002-10-24 | Bosch Gmbh Robert | Method and device for controlling at least one heating element |
-
2005
- 2005-09-22 DE DE102005045231A patent/DE102005045231A1/en not_active Withdrawn
-
2006
- 2006-09-06 WO PCT/EP2006/066063 patent/WO2007033906A1/en active Application Filing
- 2006-09-06 AT AT06806758T patent/ATE450709T1/en active
- 2006-09-06 DE DE502006005544T patent/DE502006005544D1/en active Active
- 2006-09-06 ES ES06806758T patent/ES2336370T3/en active Active
- 2006-09-06 EP EP06806758A patent/EP1934468B1/en not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| EP1934468A1 (en) | 2008-06-25 |
| DE102005045231A1 (en) | 2007-03-29 |
| ES2336370T3 (en) | 2010-04-12 |
| DE502006005544D1 (en) | 2010-01-14 |
| WO2007033906A1 (en) | 2007-03-29 |
| ATE450709T1 (en) | 2009-12-15 |
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