EP0975984B1 - Diagnosis of electrical consumers in a motor vehicle - Google Patents
Diagnosis of electrical consumers in a motor vehicle Download PDFInfo
- Publication number
- EP0975984B1 EP0975984B1 EP99906060A EP99906060A EP0975984B1 EP 0975984 B1 EP0975984 B1 EP 0975984B1 EP 99906060 A EP99906060 A EP 99906060A EP 99906060 A EP99906060 A EP 99906060A EP 0975984 B1 EP0975984 B1 EP 0975984B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor vehicle
- electrical
- loads
- recorded
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000003745 diagnosis Methods 0.000 title description 6
- 238000000034 method Methods 0.000 claims description 20
- 238000011156 evaluation Methods 0.000 claims description 10
- 239000013598 vector Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 2
- 230000003197 catalytic effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
Definitions
- the invention relates to the diagnosis of electrical consumers by evaluating the battery voltage.
- DE 44 22 149 describes how, for example, the Functionality of a lamp in normal operation of the Motor vehicle by evaluating the vehicle electrical system voltage is verifiable.
- the vehicle electrical system voltage when entering and / or Switching off individual consumers are in normal operation of the Motor vehicle interference superimposed by pressing caused by other consumers.
- DE 44 22 149 provides a remedy a modeling of the vehicle electrical system voltage during operation and / or a mathematical folding of the measured vehicle electrical system voltage with a sudden signal. Out of that one Independence from DC components and a reduced sensitivity to high-frequency interference, how they occur in the operation of the vehicle result.
- the object of the invention is to provide a Electrical system voltage evaluation for checking electrical Consumers in a motor vehicle whose Interference sensitivity further reduced and their evaluation is further simplified. This makes the Reliability of the evaluation simplified.
- the essence of the invention is various to control electrical consumers when the influences other consumers on vehicle voltage changes can be neglected.
- control unit overrun Motor vehicles whose engine using a control unit is regulated, have electronic assemblies that not only during the operation of the motor vehicle but even after the engine has been switched off, i.e. after opening of the ignition switch must be supplied with voltage. It is usually necessary to do this Power supply only for a certain period of time after stopping the engine. This Period is generally referred to as control unit overrun.
- connection of an electrical consumer in the Control unit overrun leads to a characteristic Change in the electrical system voltage by the electrical Properties of the supply line and the consumer (ohmic, capacitive and / or inductive load) and the is evaluated according to the invention for diagnosis.
- alternative other electrical parameters e.g. the current change can be measured.
- the consumers to be diagnosed are e.g. Valves like the exhaust gas recirculation valve, the tank ventilation valve, the Injectors or other units like that Secondary air pump, fan, ignition coils, etc. conceivable.
- This By default, consumers are powered by the engine control unit driven.
- the procedure can be applied to all Consumers, for example on electric heaters (for Catalyst, exhaust gas probe, etc.) and the lighting system be expanded.
- the Consumer can be controlled independently.
- the measurement signals can now through different evaluation methods respectively Signal processing algorithms are processed further. It is about typical signal curves of intact and typical courses of defective aggregates differ.
- a Control of individual consumers with the engine running and switched off generator and switched off further Consumers.
- the control is advantageously carried out in push mode with injection and ignition switched off.
- the battery voltage curve is then not Interferences from the generator or injection and / or Ignition output stages falsified.
- Figure 1 shows the basic structure of a Implementation of a first embodiment of the Invention suitable device.
- Figure 2 shows the course of the voltage, as in the Structure of Figure 1 when opening and closing the switch 2 occurs.
- Figure 3 discloses a flow diagram of the first Embodiment of the method according to the invention.
- Figure 4 shows the basic structure of a Implementation of a second embodiment of the Invention suitable device.
- Figure 5 discloses a flow diagram of the second Embodiment of the method according to the invention.
- the 1 in Figure 1 denotes an electrical Consumer who with closed switch 2 with a Vehicle battery 3 is connected. Those in the circuit Consumer 1, switch 2 and battery 3 prevailing On-board electrical system voltage is detected with the voltmeter 4 and the Control unit 5 supplied for evaluation. The control unit 5 controls switch 2. Depending on the result of the evaluation an error lamp 6 can be activated by the control device 5.
- the voltage curve is characterized by the electrical properties of the supply line and the consumer.
- the voltage curve according to Figure 2 results from an on-board electrical system source voltage of 12 V, an internal resistance of the voltage source of 20 m ⁇ , an ohmic lead resistance of 58 m ⁇ , an inductive lead resistance of 60 ⁇ as well as the connection of a powerful ohmic consumer with a 2 ⁇ resistor to a low-power consumer of 24 ⁇ resistance.
- the lead resistances mentioned represent long leads in a motor vehicle electrical system. They correspond to a line with a length of 5 m and a cross section of 1.5 m 2 .
- Step 3.2 After switching off the engine in step 3.1 Step 3.2 all electrical consumers except that Control unit 5 itself turned off. If in Control unit overrun functions such as free burning of the Hot wire air mass meter take place, its end awaited. Step 3.3 switches individual consumers detached from their destination in normal operation Diagnostic purposes on and off. For example Injectors, ignition coils, exhaust gas recirculation valves Tank vent valve, a secondary air pump, electric Fans, electric heaters, for example for Flue gas probes or the lighting system operated briefly become.
- Threshold values of approx. 8 V for switching on and 50V for the Suitable for switching off.
- the reference threshold of 8 volts not reached when switched on is with large Probability of an electrical defect, e.g. one Interruption of the supply line.
- step 3.4 he follows a recording of the voltage values during the switching operations. For example, peak values or several Measured values showing the time course of the voltage change reflect, be grasped.
- Step 3.5 is for Comparison of the detected values with predetermined ones Reference values.
- Threshold values for comparison with measuring peak values or also stored reference curves in question.
- Curves can, for example, consist of n in succession an n-dimensional vector is calculated become an n-dimensional reference vector corresponds.
- the length of the difference vector i.e. the The distance between the two vectors must be for a functional consumer also exceed a threshold.
- Step 3.6 the display and / or storage of the Error information.
- Error lamp 6 is used for the display Storage in the control unit 5 enables statistical Validation of the diagnostic result. So it can make sense be the error lamp only when the switch on the same error and also with repeated Failure to delete the error.
- Number 7 represents a generator with excitation inductances 8.
- the generator can be disconnected from the electrical system.
- this is made possible by a switch 9 which is switched from Control unit 5 can be operated.
- Switch 9 will opened when a means 11 for detecting a Sliding operating state of the internal combustion engine 10 Push operation signals.
- Push operation is, for example, with Driving a car downhill when the internal combustion engine is off the wheels are driven. For example, it can Falling below a predetermined lower value for the Position of a power actuator of the engine detected become.
- switch 16 is opened, which the Ignition and / or injection output stages 14 and 15 from the vehicle electrical system separates. This deactivates the igniters 12 and Fuel injectors 13 in overrun and prevents interference from these components in the Board supply voltage.
- Fig. 4 b shows with a mechanical or electrical Coupling 17 between generator 7 and internal combustion engine 10 another way of interference coupling of the generator to prevent on-board electrical system voltage.
- the mechanical adhesion in Push operation interrupted by opening the clutch 17 be so that the generator is not driven.
- the Interruption of the flow of power is an alternative to open the switch 9 in the power supply Pathogen inductances.
- step 5.1 checks whether there is a push mode.
- step 5.2 the switch-off is positive the generator via mechanical decoupling or opening the Switch 9 in the excitation circuit of the generator and that Switching off electrical consumers, especially of Injection and ignition output stages.
- step 5.2 follow the steps 3.3 already explained until 3.6. In other words: it is switched on individual consumer to be checked, the inclusion of Voltage and / or current values, the comparison of the recorded values with reference values as well as displaying and / or storing errors depending on the Comparison result.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Description
Die Erfindung betrifft die Diagnose elektrischer Verbraucher durch Auswertung der Batteriespannung.The invention relates to the diagnosis of electrical consumers by evaluating the battery voltage.
In diesem Zusammenhang ist aus der DE OS 40 26 232 eine Auswertung der Bordnetzspannung zur Diagnose eines Drehzahlgebers bekannt. Dabei wird vom Steuergerät der Abfall und nachfolgende Wiederanstieg der Bordnetzspannung, d.h. der Batteriespannung beim Betätigen des Anlassers erfaßt. Wird vom Steuergerät ein solcher Spannungsverlauf erkannt, wird daraus geschlossen, daß ein Anlaßvorgang stattgefunden hat. Das Ausgangssignal des zu überwachenden Drehzahlgebers muß dann erkennen lassen, daß sich die Kurbelwelle dreht. Ändert sich das Ausgangssignal des Drehzahlgebers nicht, muß ein Defekt des Gebers oder eine Leitungsunterbrechung vorliegen.In this context is from DE OS 40 26 232 Evaluation of the vehicle electrical system voltage for the diagnosis of a Known speed sensor. The control unit will Drop and subsequent rise in the electrical system voltage, i.e. the battery voltage when the starter is actuated detected. If the control unit does such a voltage curve recognized, it is concluded that a starting process has taken place. The output signal of the to be monitored The speed sensor must then show that the Crankshaft turns. If the output signal of the Speed encoder does not have a defect in the encoder or a There is a line break.
Die DE 44 22 149 beschreibt, wie beispielsweise die Funktionsfähigkeit einer Lampe im normalen Betrieb des Kraftfahrzeuges durch Auswertung der Bordnetzspannung überprüfbar ist. Der Bordnetzspannung beim Ein- und/oder Ausschalten einzelner Verbraucher sind im Normalbetrieb des Kraftfahrzeuges Störungen überlagert, die durch Betätigen anderer Verbraucher verursacht werden. Als Beispiel seien die bei laufendem Motor regelmäßig auftretenden Einspritzund Zündsignale genannt. Zur Abhilfe sieht die DE 44 22 149 eine Modellierung der Bordnetzspannung im Betrieb und/oder eine mathematische Faltung der gemessenen Bordnetzspannung mit einem sprungförmigen Signal vor. Daraus soll eine Unabhängigkeit von Gleichspannungsanteilen und eine verringerte Empfindlichkeit gegen hochfrequente Störungen, wie sie im Betrieb des Fahrzeugs auftreten, resultieren.DE 44 22 149 describes how, for example, the Functionality of a lamp in normal operation of the Motor vehicle by evaluating the vehicle electrical system voltage is verifiable. The vehicle electrical system voltage when entering and / or Switching off individual consumers are in normal operation of the Motor vehicle interference superimposed by pressing caused by other consumers. As an example the injection and regularly occurring with the engine running Ignition signals called. DE 44 22 149 provides a remedy a modeling of the vehicle electrical system voltage during operation and / or a mathematical folding of the measured vehicle electrical system voltage with a sudden signal. Out of that one Independence from DC components and a reduced sensitivity to high-frequency interference, how they occur in the operation of the vehicle result.
Die Aufgabe der Erfindung besteht in der Angabe einer Bordnetzspannungsauswertung zur Überprüfung elektrischer Verbraucher in einem Kraftfahrzeug, deren Störempfindlichkeit weiter verringert und deren Auswertung weiter vereinfacht ist. Damit wird insgesamt die Zuverlässigkeit der Auswertung vereinfacht.The object of the invention is to provide a Electrical system voltage evaluation for checking electrical Consumers in a motor vehicle whose Interference sensitivity further reduced and their evaluation is further simplified. This makes the Reliability of the evaluation simplified.
Diese Aufgabe wird mit den Merkmalen der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This task is carried out with the characteristics of the independent Claims resolved. Advantageous developments of the invention are the subject of the dependent claims.
Der Kern der Erfindung besteht darin, verschiedene elektrische Verbraucher dann anzusteuern, wenn die Einflüsse anderer Verbraucher auf Bordnetzspannungsänderungen vernachlässigt werden können.The essence of the invention is various to control electrical consumers when the influences other consumers on vehicle voltage changes can be neglected.
In einem ersten Ausführungsbeispiel werden einzelne Verbraucher im Steuergerätenachlauf bei abgestelltem Motor angesteuert und aufgrund der Änderung der Batteriespannung erfolgt ein Schluß auf die Funktionsfähigkeit des Verbrauchers.In a first embodiment, individual Consumers in control unit run-on with the engine switched off controlled and due to the change in battery voltage concludes on the functionality of the Consumer.
Kraftfahrzeuge, deren Motor mit Hilfe eines Steuergerätes geregelt wird, weisen elektronische Baugruppen auf, die nicht nur während des Betriebs des Kraftfahrzeuges sondern auch noch nach Abschalten des Motors, also nach dem Öffnen des Zündschalters mit Spannung versorgt werden müssen. Üblicherweise ist es dabei erforderlich, diese Spannungsversorgung nur noch für einen bestimmten Zeitraum nach dem Abstellen des Motors aufrechtzuerhalten. Dieser Zeitraum wird allgemein als Steuergerätenachlauf bezeichnet.Motor vehicles whose engine using a control unit is regulated, have electronic assemblies that not only during the operation of the motor vehicle but even after the engine has been switched off, i.e. after opening of the ignition switch must be supplied with voltage. It is usually necessary to do this Power supply only for a certain period of time after stopping the engine. This Period is generally referred to as control unit overrun.
Das Zuschalten eines elektrischen Verbrauchers im Steuergerätenachlauf führt zu einer charakteristischen Änderung der Bordnetzspannung, die von den elektrischen Eigenschaften der Zuleitung und des Verbrauchers (ohmsche, kapazitive und/oder induktive Last) abhängig ist und die erfindungsgemäß zur Diagnose ausgewertet wird. Alternativ zur Spannung können auch andere elektrische Parameter, bspw die Stromänderung gemessen werden.The connection of an electrical consumer in the Control unit overrun leads to a characteristic Change in the electrical system voltage by the electrical Properties of the supply line and the consumer (ohmic, capacitive and / or inductive load) and the is evaluated according to the invention for diagnosis. alternative other electrical parameters, e.g. the current change can be measured.
Als zu diagnostizierende Verbraucher sind z.B. Ventile, wie das Abgasrückführventil, das Tankentlüftungsventil, die Einspritzventile oder sonstige Aggregate wie die Sekundärluftpumpe, Lüfter, Zündspulen usw. denkbar. Diese Verbraucher werden standardmäßig von dem Motorsteuergerät angesteuert. Das Verfahren kann prinzipiell auf alle Verbraucher, beispielsweise auf elektrische Heizungen (für Katalysator, Abgassonde usw. ) und die Lichtanlage ausgeweitet werden. Vorteilhaft ist allerdings, daß der Verbraucher unabhängig angesteuert werden kann. Nach dem Anund Ausschalten des Verbrauchers wird jeweils der Batteriespannungsverlauf gespeichert. Die Meßsignale können nun durch verschiedene Auswerteverfahren beziehungsweise Signalverarbeitungsalgorithmen weiterverarbeitet werden. Dabei geht es darum, typische Signalverläufe von intakten und typische Verläufe von defekten Aggregaten zu unterscheiden. The consumers to be diagnosed are e.g. Valves like the exhaust gas recirculation valve, the tank ventilation valve, the Injectors or other units like that Secondary air pump, fan, ignition coils, etc. conceivable. This By default, consumers are powered by the engine control unit driven. In principle, the procedure can be applied to all Consumers, for example on electric heaters (for Catalyst, exhaust gas probe, etc.) and the lighting system be expanded. However, it is advantageous that the Consumer can be controlled independently. After the anund The consumer is switched off in each case Battery voltage history saved. The measurement signals can now through different evaluation methods respectively Signal processing algorithms are processed further. It is about typical signal curves of intact and typical courses of defective aggregates differ.
Die Durchführung der Diagnose im Steuergerätenachlauf bei abgestelltem Motor besitzt den Vorteil, daß keine Störeinkopplungen durch den Motorbetrieb auftreten und die Aggregate ungestört angesteuert werden können. Insgesamt ergibt sich damit eine einfache und zuverlässige Diagnose der elektrischen Verbraucher des Fahrzeugs.Carrying out the diagnosis in the control unit run-up at turned off engine has the advantage that none Interference due to engine operation and the Units can be controlled undisturbed. All in all This results in a simple and reliable diagnosis the electrical consumer of the vehicle.
In einem zweiten Ausführungsbeispiel erfolgt eine Ansteuerung einzelner Verbraucher bei laufendem Motor und abgeschaltetem Generator und abgeschalteten weiteren Verbrauchern.In a second embodiment, a Control of individual consumers with the engine running and switched off generator and switched off further Consumers.
Vorteilhafterweise erfolgt die Ansteuerung im Schiebebetrieb bei abgeschalteter Einspritzung und Zündung. Der Batteriespannungsverlauf wird dann nicht durch Störeinkopplungen vom Generator oder Einspritz- und/oder Zündendstufen verfälscht.The control is advantageously carried out in push mode with injection and ignition switched off. The The battery voltage curve is then not Interferences from the generator or injection and / or Ignition output stages falsified.
Im folgenden werden Ausführungsbeispiele der Erfindung mit Bezug auf die Figuren erläutert.The following are exemplary embodiments of the invention Explained with reference to the figures.
Figur 1 zeigt die prinzipielle Struktur einer zur Durchführung eines ersten Ausführungsbeispieles der Erfindung geeigneten Vorrichtung.Figure 1 shows the basic structure of a Implementation of a first embodiment of the Invention suitable device.
Figur 2 stellt den Verlauf der Spannung dar, wie er in der
Struktur der Figur 1 beim Öffnen und Schließen des Schalters
2 auftritt.Figure 2 shows the course of the voltage, as in the
Structure of Figure 1 when opening and closing the
Figur 3 offenbart ein Flußdiagramm des ersten Ausführungsbeispiels des erfindungsgemäßen Verfahrens.Figure 3 discloses a flow diagram of the first Embodiment of the method according to the invention.
Figur 4 stellt die prinzipielle Struktur einer zur Durchführung eines zweiten Ausführungsbeispieles der Erfindung geeigneten Vorrichtung. Figure 4 shows the basic structure of a Implementation of a second embodiment of the Invention suitable device.
Figur 5 offenbart ein Flußdiagramm des zweiten Ausführungsbeispiels des erfindungsgemäßen Verfahrens.Figure 5 discloses a flow diagram of the second Embodiment of the method according to the invention.
Die 1 in der Figur 1 bezeichnet einen elektrischen
Verbraucher, der bei geschlossenem Schalter 2 mit einer
Fahrzeugbatterie 3 verbunden ist. Die im Stromkreis aus
Verbraucher 1, Schalter 2 und Batterie 3 herrschende
Bordnetzspannung wird mit dem Voltmeter 4 erfaßt und dem
Steuergerät 5 zur Auswertung zugeführt. Das Steuergerät 5
steuert den Schalter 2. Abhängig vom Ergebnis der Auswertung
kann vom Steuergerät 5 eine Fehlerlampe 6 aktiviert werden.The 1 in Figure 1 denotes an electrical
Consumer who with closed
Das Zuschalten eines elektrischen Verbrauchers führt zu einer typischen Spannungsänderung im Bordnetz, wie sie in Figur 2 dargestellt ist. Der Spannungsverlauf wird durch die elektrischen Eigenschaften der Zuleitung und des Verbrauchers charakterisiert. Der Spannungsverlauf nach Figur 2 ergibt sich bei einer Bordnetzquellspannung von 12 V, einem Innenwiderstand der Spannungsquelle von 20 mΩ, einem ohmschen Zuleitungswiderstand von 58 mΩ, einem induktiven Zuleitungswiderstand von 60 Ω sowie dem Zuschalten eines stromstarken ohmschen Verbrauchers mit 2 Ω Widerstand zu einem stromschwachen Verbraucher von 24 Ω Widerstand. Die genannten Zuleitungswiderstände repräsentieren lange Leitungen in einem Kraftfahrzeugbordnetz. Sie entsprechen einer Leitung mit 5m Länge und mit 1,5 m2 Querschnitt.Switching on an electrical consumer leads to a typical voltage change in the vehicle electrical system, as shown in FIG. 2. The voltage curve is characterized by the electrical properties of the supply line and the consumer. The voltage curve according to Figure 2 results from an on-board electrical system source voltage of 12 V, an internal resistance of the voltage source of 20 mΩ, an ohmic lead resistance of 58 mΩ, an inductive lead resistance of 60 Ω as well as the connection of a powerful ohmic consumer with a 2 Ω resistor to a low-power consumer of 24 Ω resistance. The lead resistances mentioned represent long leads in a motor vehicle electrical system. They correspond to a line with a length of 5 m and a cross section of 1.5 m 2 .
Das Flußdiagramm der Figur 3 veranschaulicht den Ablauf des erfindungsgemäßen Verfahrens.The flow chart of Figure 3 illustrates the process of inventive method.
Nach dem Abstellen des Motors in einem Schritt 3.1 werden im
Schritt 3.2 alle elektrischen Verbraucher außer dem
Steuergerät 5 selbst ausgeschaltet. Falls im
Steuergerätenachlauf Funktionen wie das Freibrennen des
Hitzdrahtluftmassenmessers stattfinden, wird ihr Ende
abgewartet. Schritt 3.3 schaltet einzelne Verbraucher
losgelöst von ihrer Bestimmung im Normalbetrieb zu
Diagnosezwecken ein und aus. Beispielsweise können
Einspritzventile, Zündspulen, Abgasrückführventile, ein
Tankentlüftungsventil, eine Sekundärluftpumpe, elektrische
Lüfter, elektrische Heizungen, beispielsweise für
Abgassonden oder auch die Lichtanlage kurzzeitig betätigt
werden.After switching off the engine in step 3.1
Step 3.2 all electrical consumers except that
Wie aus Figur 2 ersichtlich, sind die Spannungsänderungen ausreichend groß, um beispielsweise mit Hilfe einfacher Referenz- oder Schwellwertvergleiche detektiert werden zu können. Für das dargestellte Beispiel sind beispielsweise Schwellwerte von ca. 8 V für das Einschalten und 50V für das Ausschalten geeignet. Wird bspw. der Referenzschwellwert von 8 Volt beim Einschalten nicht erreicht, liegt mit großer Wahrscheinlichkeit ein elektrischer Defekt, bspw. eine Unterbrechung der Zuleitung vor. Im Schritt 3.4. erfolgt eine Aufnahme der Spannungswerte bei den Schaltvorgängen. Dabei können beispielsweise Spitzenwerte oder auch mehrere Meßwerte, die den zeitlichen Verlauf der Spannungsänderung widerspiegeln, erfaßt werden. Schritt 3.5 dient zum Vergleich der erfaßten Werte mit vorbestimmten Referenzwerten. Als Referenzwerte kommen einfache Schwellwerte für den Vergleich mit Meßspitzenwerten oder auch abgespeicherte Referenzkurven in Frage. Im Fall der Kurven kann beispielsweise aus n zeitlich hintereinander aufgenommenen Meßwerten ein n-dimensionaler Vektor berechnet werden, der zu einem n-dimensionalen Referenzvektor korrespondiert. Die Länge des Differenzvektors, also der Abstand beider Vektoren muß bei funktionsfähigem Verbraucher ebenfalls einen Schwellwert überschreiten. As can be seen from Figure 2, the voltage changes sufficiently large to be easier, for example, with the help Reference or threshold value comparisons are detected too can. For the example shown are Threshold values of approx. 8 V for switching on and 50V for the Suitable for switching off. For example, if the reference threshold of 8 volts not reached when switched on, is with large Probability of an electrical defect, e.g. one Interruption of the supply line. In step 3.4. he follows a recording of the voltage values during the switching operations. For example, peak values or several Measured values showing the time course of the voltage change reflect, be grasped. Step 3.5 is for Comparison of the detected values with predetermined ones Reference values. Simple reference values come Threshold values for comparison with measuring peak values or also stored reference curves in question. In the case of Curves can, for example, consist of n in succession an n-dimensional vector is calculated become an n-dimensional reference vector corresponds. The length of the difference vector, i.e. the The distance between the two vectors must be for a functional consumer also exceed a threshold.
Abhängig vom Schwellwertvergleich im Schritt 3.5 erfolgt im
Schritt 3.6 die Anzeige und/oder Abspeicherung der
Fehlerinformation. Zur Anzeige dient die Fehlerlampe 6. Die
Abspeicherung im Steuergerät 5 ermöglicht eine statistische
Absicherung des Diagnoseergebnisses. So kann es sinnvoll
sein, die Fehlerlampe erst beim mehrmaligem Auftreten des
gleichen Fehlers einzuschalten und auch bei mehrmaligem
Ausbleiben des Fehlers wieder zu löschen.Depending on the threshold value comparison in step 3.5
Step 3.6 the display and / or storage of the
Error information. Error lamp 6 is used for the display
Storage in the
Die Vorrichtung nach Fig. 4 zum zweiten Ausführungsbeispiel
der Erfindung unterscheidet sich von der Fig. 1 durch die
Darstellung weiterer Komponenten 7 bis 16. Die Ziffer 7
repräsentiert einen Generator mit Erregerinduktivitäten 8.
Der Generator kann vom Bordnetz getrennt werden. In der Fig.
4 wird dies durch einen Schalter 9 ermöglicht, der vom
Steuergerät 5 betätigt werden kann. Schalter 9 wird
geöffnet, wenn ein Mittel 11 zur Detektion eines
Schiebebetriebszustandes des Verbrennungsmotors 10
Schiebebetrieb signalisiert. Schiebetrieb liegt bspw. beim
Bergabfahren eines Autos vor, wenn der Verbrennungsmotor von
den Rädern angetrieben wird. Er kann bspw. durch
Unterschreiten eines vorgegebenen unteren Wertes für die
Stellung eines Leistungsstellgliedes des Motors erfaßt
werden. Neben Schalter 9 wird Schalter 16 geöffnet, der die
Zünd- und/oder Einspritzendstufen 14 und 15 vom Bordnetz
trennt. Dies deaktiviert die Zündvorrichtungen 12 und
Kraftstoffeinspritzvorrichtungen 13 im Schiebebetrieb und
verhindert Störeinkopplungen von diesen Komponenten in die
Bordnetzspannung.4 for the second embodiment
the invention differs from FIG. 1 by
Representation of
Fig. 4 b zeigt mit einer mechanischen oder elektrischen
Kupplung 17 zwischen Generator 7 und Verbrennungsmotor 10
eine weitere Möglichkeit, Störeinkopplungen des Generators
auf die Bordnetzspannung zu verhindern. In diesem
Ausführungsbeispiel kann der mechanische Kraftschluß im
Schiebebetrieb durch Öffnen der Kupplung 17 unterbrochen
werden, so daß der Generator nicht angetrieben wird. Die
Unterbrechung des Kraftflusses stellt damit eine Alternative
zur Öffnung des Schalters 9 in der Stromversorgung der
Erregerinduktivitäten dar.Fig. 4 b shows with a mechanical or
Das Flußdiagramm der Fig. 5 veranschaulicht den Ablauf eines
Ausführungsbeispiels des erfindungsgemäßen Verfahrens mit
der Vorrichtung der Fig. 4. In einem Schritt 5.1 wird
überprüft, ob ein Schiebebetriebszustand vorliegt. Bei
positivem Ergebnis erfolgt im Schritt 5.2 das Ausschalten
des Generators über mechanische Abkopplung oder Öffnen des
Schalters 9 im Erregerstromkreis des Generators sowie das
Ausschalten von elektrischen Verbrauchern, insbesondere von
Einspritz- und Zündendstufen.5 illustrates the flow of a
Embodiment of the method according to the
Nach Schritt 5.2 folgen die bereits erläuterten Schritte 3.3 bis bis 3.6. Mit anderen Worten: Es folgt das Einschalten einzelner, zu überprüfender Verbraucher, die Aufnahme von Spannungs- und/oder Stromwerten, der Vergleich der aufgenommenen Werte mit Referenzwerten sowie das Anzeigen und/oder Abspeichern von Fehlern in Abhängigkeit vom Vergleichsergebnis.After step 5.2 follow the steps 3.3 already explained until 3.6. In other words: it is switched on individual consumer to be checked, the inclusion of Voltage and / or current values, the comparison of the recorded values with reference values as well as displaying and / or storing errors depending on the Comparison result.
Claims (12)
- Method for checking electrical loads in a motor vehicleby evaluation of an electrical variable in the motor vehicle power supply system,when changes in the operating state of the load occur,which are initiated by the controllerin special operating states of the motor vehicle,separately from their determination during normal operation.
- Method according to Claim 1, characterized by the controller running on as a special operating state after the motor vehicle has been shut down.
- Method according to Claim 1, characterized by switching off at least one of the functions of ignition or injection for an internal combustion engine in the motor vehicle, and/or switching off an electrical generator which is driven by the internal combustion engine.
- Method according to one of the preceding claims, characterized by application of the method to loads which are normally driven by the controller during normal operation of the motor vehicle.
- Method according to Claim 4, characterized byvalves such as the exhaust gas feedback valve, the tank vent valve, the injection valves orother units such as the secondary air pump, fans, ignition coils, electrical catalytic converters and/or exhaust gas probe heaters as electrical loads.
- Method according to Claim 1, characterized by application of the method to further loads which can be driven independently of other loads, and which are normally not operated by the controller, such as the lighting system.
- Method according to Claim 1, characterized in that a voltage or a current is recorded while the load is being connected and/or disconnected, and is compared with at least one predetermined reference value.
- Method according to Claim 7, characterized in that peak values or else two or more measured values which reflect the time profile of the voltage change are recorded and are compared with reference threshold values or reference curves.
- Method according to Claim 8, characterized in that the recorded values are processed further by various evaluation methods and/or signal processing algorithms.
- Method according to Claim 9, characterized in that an n-dimensional vector is calculated from n successively recorded measured values, which vector corresponds to an n-dimensional reference vector, and in that the length of the difference vector, that is to say the distance between the two vectors, is compared with a threshold value.
- Method according to one of the preceding claims, characterized in that a fault which has been identified is indicated and/or stored.
- Apparatus for checking electrical loads in a motor vehicle havingmeans (4, 5) for detection and evaluation of an electrical variable in the motor vehicle power supply system with an electrical generator,with the electrical variable being recorded and evaluated as a reaction to the initiation of the load, and with the initiation of the load in particular operating states of the motor vehiclebeing separated from the purpose of the load during normal operation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19801627 | 1998-01-17 | ||
| DE1998101627 DE19801627C1 (en) | 1998-01-17 | 1998-01-17 | Method of diagnosing electrical loads in motor vehicles |
| PCT/DE1999/000105 WO1999036794A1 (en) | 1998-01-17 | 1999-01-18 | Diagnosis of electrical consumers in a motor vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0975984A1 EP0975984A1 (en) | 2000-02-02 |
| EP0975984B1 true EP0975984B1 (en) | 2004-08-11 |
Family
ID=7854902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99906060A Expired - Lifetime EP0975984B1 (en) | 1998-01-17 | 1999-01-18 | Diagnosis of electrical consumers in a motor vehicle |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6122576A (en) |
| EP (1) | EP0975984B1 (en) |
| JP (1) | JP4443635B2 (en) |
| DE (2) | DE19801627C1 (en) |
| WO (1) | WO1999036794A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3758022B2 (en) * | 1999-12-27 | 2006-03-22 | 三菱自動車工業株式会社 | Forced drive device for electrical equipment for vehicles |
| DE10009770B4 (en) * | 2000-03-01 | 2004-11-18 | Voith Turbo Gmbh & Co. Kg | Electronic control device for a motor vehicle and data backup method therefor |
| JP4124729B2 (en) * | 2001-08-15 | 2008-07-23 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Stabilizing onboard power supply networks by creating energy that can be used for a short time |
| FR2829310B1 (en) * | 2001-09-06 | 2004-09-24 | Peugeot Citroen Automobiles Sa | METHOD AND DEVICE FOR CONTROLLING ELECTRICAL ORGANS ON BOARD A VEHICLE |
| DE102004030955A1 (en) * | 2004-06-26 | 2006-01-12 | Adam Opel Ag | Self-cleaning burning of motor vehicle fuel tank contents measurement device electrical contacts involves only passing voltage pulse through electrical contacts when ignition system of motor vehicle is switched off |
| DE102004053953A1 (en) * | 2004-11-09 | 2006-05-11 | Daimlerchrysler Ag | Testing vehicle electronics involves activating component(s)/controller(s), measuring vehicle current, determining activated component/controller current drain from difference of vehicle, total battery current with controllers in test mode |
| JP4108712B2 (en) * | 2006-02-17 | 2008-06-25 | 三菱電機株式会社 | Fuel level detector for automobiles |
| DE102011103172A1 (en) * | 2011-06-01 | 2012-12-06 | Lucas Automotive Gmbh | Method for determining parasitic resistance in supply path of electronic control unit for motor car-brake system, involves measuring voltage drops at two terminals and determining parasitic resistance from voltage drops and current value |
| DE102014018640B3 (en) * | 2014-12-13 | 2016-03-03 | Audi Ag | Method for electrical resistance measurement in motor vehicles and motor vehicles |
| DE102019203927A1 (en) * | 2019-03-22 | 2020-09-24 | Robert Bosch Gmbh | Procedure for on-board network diagnostics |
| CN114251157A (en) * | 2021-12-24 | 2022-03-29 | 潍柴动力股份有限公司 | Oil-gas separator pipeline, method and device for diagnosing fault of oil-gas separator |
Family Cites Families (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4207611A (en) * | 1978-12-18 | 1980-06-10 | Ford Motor Company | Apparatus and method for calibrated testing of a vehicle electrical system |
| KR910003809Y1 (en) * | 1987-03-31 | 1991-06-03 | 미쓰비시전기 주식회사 | Multi-function tester for self-diagnosis |
| GB2210999B (en) * | 1987-10-09 | 1992-04-29 | Fuji Heavy Ind Ltd | Diagnostic system for a motor vehicle |
| DE3832123A1 (en) * | 1987-10-09 | 1989-04-27 | Fuji Heavy Ind Ltd | DIAGNOSTIC SYSTEM FOR A MOTOR VEHICLE |
| JPH0830672B2 (en) * | 1987-12-11 | 1996-03-27 | 富士重工業株式会社 | Vehicle diagnostic device |
| JPH0718779B2 (en) * | 1988-02-16 | 1995-03-06 | 富士重工業株式会社 | Vehicle diagnostic device |
| JPH0776725B2 (en) * | 1988-02-18 | 1995-08-16 | 富士重工業株式会社 | Vehicle diagnostic device |
| JPH0776726B2 (en) * | 1988-02-18 | 1995-08-16 | 富士重工業株式会社 | Vehicle diagnostic device |
| JPH0776724B2 (en) * | 1988-02-18 | 1995-08-16 | 富士重工業株式会社 | Vehicle diagnostic device |
| JPH079388B2 (en) * | 1988-02-29 | 1995-02-01 | 富士重工業株式会社 | Vehicle diagnostic system |
| DE4026232C2 (en) * | 1990-08-18 | 2003-09-04 | Bosch Gmbh Robert | Device for monitoring a speed sensor |
| US5809437A (en) * | 1995-06-07 | 1998-09-15 | Automotive Technologies International, Inc. | On board vehicle diagnostic module using pattern recognition |
| US5506773A (en) * | 1992-08-11 | 1996-04-09 | Nippondenso Co., Ltd. | Self-diagnosing apparatus for motor vehicles |
| JP3309437B2 (en) * | 1992-08-19 | 2002-07-29 | 株式会社デンソー | Vehicle self-diagnosis device |
| JPH0674086A (en) * | 1992-08-27 | 1994-03-15 | Nippondenso Co Ltd | Self-diagnostic device for vehicle |
| US5448492A (en) * | 1992-10-26 | 1995-09-05 | United Technologies Automotive, Inc. | Monitoring the characteristics of a load driver controlled by a microcontroller |
| DE4338462B4 (en) * | 1993-11-11 | 2004-04-22 | Hella Kg Hueck & Co. | Control system for electrical consumers in motor vehicles |
| US5550762A (en) * | 1993-12-20 | 1996-08-27 | Doll; John A. | Diagnostic system for electronic automotive system |
| DE4402853C1 (en) * | 1994-01-31 | 1994-11-24 | Daimler Benz Ag | Hand-held transmitter for the remote control of different vehicle systems |
| DE4422149A1 (en) * | 1994-06-27 | 1996-01-04 | Bosch Gmbh Robert | Process for evaluating signals |
| JP3203162B2 (en) * | 1995-08-31 | 2001-08-27 | 株式会社日立製作所 | Automotive load drive |
| DE19539852C1 (en) * | 1995-10-26 | 1996-10-02 | Daimler Benz Ag | Ignition key vehicle communication unit with at least one electronic key |
| US5739592A (en) * | 1996-01-31 | 1998-04-14 | Grote Industries, Inc. | Power and communications link between a tractor and trailer |
| US5890080A (en) * | 1996-06-25 | 1999-03-30 | Freightliner Corporation | Truck with monitored and resettable electronic control units |
| US6014598A (en) * | 1996-06-28 | 2000-01-11 | Arcelik A.S. | Model-based fault detection system for electric motors |
| JP3345829B2 (en) * | 1997-03-31 | 2002-11-18 | 本田技研工業株式会社 | Diagnostic program creation device for vehicles |
| US5950149A (en) * | 1997-06-30 | 1999-09-07 | Chrysler Corporation | Method for testing vehicle electrical system during manufacturing |
-
1998
- 1998-01-17 DE DE1998101627 patent/DE19801627C1/en not_active Expired - Fee Related
-
1999
- 1999-01-10 US US09/381,164 patent/US6122576A/en not_active Expired - Lifetime
- 1999-01-18 WO PCT/DE1999/000105 patent/WO1999036794A1/en active IP Right Grant
- 1999-01-18 JP JP53665299A patent/JP4443635B2/en not_active Expired - Fee Related
- 1999-01-18 EP EP99906060A patent/EP0975984B1/en not_active Expired - Lifetime
- 1999-01-18 DE DE59910180T patent/DE59910180D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001520749A (en) | 2001-10-30 |
| DE59910180D1 (en) | 2004-09-16 |
| EP0975984A1 (en) | 2000-02-02 |
| US6122576A (en) | 2000-09-19 |
| WO1999036794A1 (en) | 1999-07-22 |
| JP4443635B2 (en) | 2010-03-31 |
| DE19801627C1 (en) | 1999-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102004026114B4 (en) | Diagnostic systems and method for a device for detecting a leakage current | |
| EP1025595B1 (en) | Method for controlling a capacitive actuator | |
| EP0975984B1 (en) | Diagnosis of electrical consumers in a motor vehicle | |
| EP1573188B1 (en) | Device and method for identifying defects in a fuel injection system | |
| EP2619432B1 (en) | Method and device for monitoring the function of an exhaust sensor | |
| EP0100313B1 (en) | Device and method for automatically checking microprocessor-controlled electric apparatus, particularly in motor vehicles | |
| EP1745203B1 (en) | Method of diagnosis for control circuits | |
| WO2009141199A1 (en) | Method for identifying an error function and in particular a drift of a rail pressure sensor in a common rail injection system | |
| WO2009013273A1 (en) | Fault analysis method for a lambda probe | |
| EP2545269A2 (en) | Motor control device for actuating a circuit and method | |
| DE102011055140A1 (en) | Control device for controlling starter utilized for starting machine in vehicle, has diagnostic unit for performing diagnosis based on parameter value to find whether abnormality arises in starting current reduction unit | |
| WO2008113471A1 (en) | Exhaust gas system for an internal combustion engine | |
| EP1287250B1 (en) | Method for testing a capacitive actuator | |
| EP1093205A2 (en) | Device for detecting an interruption in the charging line between a generator and a battery of a vehicle | |
| WO2001028084A1 (en) | Device for automatically detecting a generator type of a motor vehicle | |
| DE112004000416T5 (en) | Methods and systems for predicting a fuel injection system failure | |
| DE102015212371B4 (en) | Method for monitoring the operation of a piezo injector | |
| DE102010039800A1 (en) | Method and device for detecting the autonomous running of an internal combustion engine | |
| DE102010041945A1 (en) | Control system for vehicle, has electronic control unit comprising diagnosing device to diagnose whether self-diagnosis device is abnormal by causing input device to input signal into self-diagnosis device | |
| DE102010043744A1 (en) | Circuit arrangement for monitoring switching of energy source for power supply of electric drive in hybrid or electric cars, has monitoring unit including measuring unit, and control device monitoring control of protecting unit | |
| DE102006020434A1 (en) | Motor vehicle e.g. hybrid motor vehicle, has control device determining compression pressure of cylinder or correlating parameter for engine based on number of revolutions and/or capacity of machine in engine`s passive-operating condition | |
| DE10142085A1 (en) | Method and device for on-board electrical system diagnosis of a motor vehicle electrical system | |
| DE102021002468A1 (en) | Pre-charging device and method for pre-charging a vehicle intermediate circuit | |
| DE102016215125B4 (en) | Method for controlling an emergency device, flap control device and control device for an internal combustion engine and internal combustion engine | |
| DE3803078C2 (en) | Method and device for monitoring the position of an electrical actual position transmitter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR IT |
|
| 17P | Request for examination filed |
Effective date: 20000124 |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR IT |
|
| REF | Corresponds to: |
Ref document number: 59910180 Country of ref document: DE Date of ref document: 20040916 Kind code of ref document: P |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20050512 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20120201 Year of fee payment: 14 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20120124 Year of fee payment: 14 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 59910180 Country of ref document: DE Effective date: 20130422 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20130930 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130131 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130118 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20140325 Year of fee payment: 16 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59910180 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150801 |