EP0975984B1 - Diagnostic de consommateurs electriques dans une automobile - Google Patents

Diagnostic de consommateurs electriques dans une automobile Download PDF

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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
Application number
EP99906060A
Other languages
German (de)
English (en)
Other versions
EP0975984A1 (fr
Inventor
Klaus Ries-Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0975984A1 publication Critical patent/EP0975984A1/fr
Application granted granted Critical
Publication of EP0975984B1 publication Critical patent/EP0975984B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.

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  • 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)

Claims (12)

  1. Procédé de vérification d'un consommateur électrique d'un véhicule automobile,
    caractérisé par
    l'exploitation d'une grandeur électrique du réseau électrique embarqué du véhicule lorsque des variations d'état de fonctionnement du consommateur sont déclenchées par l'appareil de commande dans des états de fonctionnement particuliers du véhicule en dehors de leur définition en fonctionnement normal.
  2. Procédé selon la revendication 1,
    caractérisé par
    la poursuite du fonctionnement de l'appareil de commande après l'arrêt du véhicule constituant un état de fonctionnement particulier.
  3. Procédé selon la revendication 1,
    caractérisé par
    la coupure d'au moins l'une des fonctions allumage ou injection du moteur à combustion interne du véhicule et/ou la coupure d'un générateur électrique entraíné par le moteur à combustion interne.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé par
    son application à des consommateurs commandés habituellement par l'appareil de commande lorsque le véhicule est en mode de fonctionnement normal.
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    les consommateurs électriques sont :
    des soupapes telles que la soupape de réintroduction des gaz d'échappement, la soupape de ventilation de réservoir, les injecteur ou
    d'autres équipements tels que la pompe d'air secondaire, le ventilateur, les bobines d'allumage, le catalyseur électrique et/ou le chauffage des sondes de gaz d'échappement.
  6. Procédé selon la revendication 1,
    caractérisé par
    son application à des consommateurs supplémentaires commandés indépendamment d'autres consommateurs, et qui ne sont habituellement pas commandés par l'appareil de commande, comme par exemple l'installation d'éclairage.
  7. Procédé selon la revendication 1,
    caractérisé en ce qu'
    on enregistre une tension ou une intensité lors du branchement et/ou de la coupure du consommateur et on la compare à une valeur de référence prédéfinie.
  8. Procédé selon la revendication 7,
    caractérisé en ce qu'
    on saisit les valeurs maximales ou également plusieurs valeurs de mesures qui représentent l'évolution chronologique de la variation de tension et on les compare à des valeurs de seuil de référence ou des courbes de référence.
  9. Procédé selon la revendication 8,
    caractérisé en ce qu'
    on traite les valeurs enregistrées par différents procédés d'exploitation ou algorithmes de traitement de signal.
  10. Procédé selon la revendication 9,
    caractérisé en ce qu'
    à partir de n valeurs de mesure enregistrées successivement dans le temps, on calcule un vecteur à n dimensions qui correspond à un vecteur de référence à n dimensions et on compare la longueur du vecteur de différence, c'est-à-dire la distance séparant les deux vecteurs à une valeur de seuil.
  11. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'
    on affiche l'erreur détectée et/ou on l'enregistre.
  12. Dispositif de vérification de consommateurs électriques dans un véhicule automobile, comprenant :
    des moyens (4, 5) pour saisir et exploiter une grandeur électrique du réseau électrique embarqué du véhicule équipé d'un générateur électrique,
    on saisit et on exploite la grandeur électrique comme réaction au déclenchement du consommateur, le déclenchement du consommateur se faisant dans des états de fonctionnement particuliers du véhicule automobile,
    en dehors de la détermination d'usage du consommateur en mode de fonctionnement normal.
EP99906060A 1998-01-17 1999-01-18 Diagnostic de consommateurs electriques dans une automobile Expired - Lifetime EP0975984B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1998101627 DE19801627C1 (de) 1998-01-17 1998-01-17 Diagnose elektrischer Verbraucher in einem Kraftfahrzeug
DE19801627 1998-01-17
PCT/DE1999/000105 WO1999036794A1 (fr) 1998-01-17 1999-01-18 Diagnostic de consommateurs electriques dans une automobile

Publications (2)

Publication Number Publication Date
EP0975984A1 EP0975984A1 (fr) 2000-02-02
EP0975984B1 true EP0975984B1 (fr) 2004-08-11

Family

ID=7854902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99906060A Expired - Lifetime EP0975984B1 (fr) 1998-01-17 1999-01-18 Diagnostic de consommateurs electriques dans une automobile

Country Status (5)

Country Link
US (1) US6122576A (fr)
EP (1) EP0975984B1 (fr)
JP (1) JP4443635B2 (fr)
DE (2) DE19801627C1 (fr)
WO (1) WO1999036794A1 (fr)

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DE102004030955A1 (de) * 2004-06-26 2006-01-12 Adam Opel Ag Verfahren zum Freibrennen von elektrischen Kontakten einer Messvorrichtung
DE102004053953A1 (de) * 2004-11-09 2006-05-11 Daimlerchrysler Ag Prüfverfahren für eine Fahrzeugelektronik
JP4108712B2 (ja) * 2006-02-17 2008-06-25 三菱電機株式会社 自動車用燃料残量検出装置
DE102011103172A1 (de) * 2011-06-01 2012-12-06 Lucas Automotive Gmbh Verfahren und Vorrichtung zum Ermitteln eines parasitären Widerstands für ein Kraftfahrzeug-Steuergerät
DE102014018640B3 (de) * 2014-12-13 2016-03-03 Audi Ag Verfahren zur elektrischen Widerstandsmessung im Kraftfahrzeug und Kraftfahrzeug
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CN114251157A (zh) * 2021-12-24 2022-03-29 潍柴动力股份有限公司 一种油气分离器管路、诊断油气分离器故障的方法及装置

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Also Published As

Publication number Publication date
DE19801627C1 (de) 1999-06-10
JP2001520749A (ja) 2001-10-30
WO1999036794A1 (fr) 1999-07-22
EP0975984A1 (fr) 2000-02-02
JP4443635B2 (ja) 2010-03-31
DE59910180D1 (de) 2004-09-16
US6122576A (en) 2000-09-19

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