EP1153368A1 - Procede de reconnaissance de defauts d'un vehicule automobile - Google Patents

Procede de reconnaissance de defauts d'un vehicule automobile

Info

Publication number
EP1153368A1
EP1153368A1 EP00987027A EP00987027A EP1153368A1 EP 1153368 A1 EP1153368 A1 EP 1153368A1 EP 00987027 A EP00987027 A EP 00987027A EP 00987027 A EP00987027 A EP 00987027A EP 1153368 A1 EP1153368 A1 EP 1153368A1
Authority
EP
European Patent Office
Prior art keywords
operating parameters
motor vehicle
error
operating
vehicle
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.)
Ceased
Application number
EP00987027A
Other languages
German (de)
English (en)
Inventor
Markus Klausner
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 EP1153368A1 publication Critical patent/EP1153368A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0808—Diagnosing performance data
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0841—Registering performance data
    • G07C5/085—Registering performance data using electronic data carriers

Definitions

  • the present invention relates to a method for
  • the invention also relates to a diagnostic device for predictive detection of errors in a motor vehicle.
  • preventive maintenance It is known from the prior art to carry out preventive maintenance of a motor vehicle on the basis of the mileage or the number of operating hours. For this purpose, certain operating parameters (for example, the mileage or the operating time) are recorded and stored in the motor vehicle over a certain period of time. If the operating parameters reach a predetermined value, certain parts, components and / or operating resources of the motor vehicle are checked or exchanged.
  • Known preventive maintenance relies on empirical values as to which parts, components and / or equipment must be checked or replaced when certain operating parameters have reached a predetermined value. These empirical values can partly differ considerably from the actual situation deviate in the motor vehicle. For example, defective parts, components and / or equipment may not have been checked or replaced, since the corresponding operating parameters have not yet reached a specified value. The result is a broken one
  • US Pat. No. 5,528,516 discloses a method for recognizing errors in a complex system based on observable operating parameters.
  • Complex vehicles such as a spaceship, are mentioned as complex systems in which the known method can be used; use in motor vehicles is not mentioned.
  • Known methods for detecting errors in a computer network and a satellite system are described. It is also mentioned to use the known method for medical diagnosis of a patient's symptoms.
  • operating parameters of the complex system are recorded and stored over a certain period of time. When a certain error occurs, an operational characteristic pattern is created from the recorded operational parameters, to which the error is assigned. Redundant or unnecessary information is eliminated from the operational characteristic pattern. An error occurring in the complex system can then be identified and localized on the basis of the reduced operating characteristic pattern. An error prediction is not possible with the known system.
  • the known method is used for a single complex system.
  • a combination of the created operational parameter samples of several complex systems is not intended. This has the disadvantage that the operating parameter samples have to be created for each individual system to be diagnosed and their information cannot be easily transferred to other complex systems.
  • the object of the present invention is to enable predictive detection of faults in a motor vehicle with a high degree of reliability.
  • the invention proposes, starting from the method for detecting faults in a motor vehicle of the type mentioned at the outset, a method which is characterized by the following steps: an operational characteristic pattern is created from the operational characteristics recorded before the occurrence of a specific error in the motor vehicle, which is associated with the error; - The company characteristic size pattern is described in a suitable form; and the currently recorded operating parameters are compared with the descriptions of the error-characteristic operating parameter patterns during the operation of the motor vehicle.
  • Operating parameters are recorded in a motor vehicle over a certain period of time, which can differ from motor vehicle to motor vehicle.
  • Operating parameters are understood to mean all information that describes the condition of the motor vehicle and its environment. These are, for example, signals from sensors located in the motor vehicle.
  • information about the characterization of the operational parameters for example the state of systems including occurring error codes and the date, time and / or location of the operational parameters, is also recorded.
  • the recorded operating parameters and information can be saved for the purpose of being called up later.
  • the recorded operating parameters are stored, for example, in the form of vectors, the individual vector elements corresponding to the values of the operating parameters at specific times.
  • the error can be, for example, the failure of a specific component or an unusual signal from a specific sensor.
  • the error that has occurred is identified on the basis of the recorded operational parameters and the recorded ones Information on the characterization of the operational parameters in a manner known per se from the prior art. From those recorded before the error occurred
  • Processing of the recorded operating parameters for identifying the fault can take place either in the context of an onboard diagnosis in the motor vehicle or outside the motor vehicle in a workshop.
  • the farm parameter sample is stored, for example, in the form of a matrix, the individual matrix elements corresponding to the values of different farm parameters at specific times. In particular, the times before the occurrence of the error and those operating parameters which are influenced by the error are considered.
  • the operating characteristic patterns are then described by suitable rules and / or mathematical functions (for example folding).
  • the description of the operating characteristic pattern serves to simplify and thus save space and computing resources in a computer of the motor vehicle.
  • the descriptions of the farm metric patterns are attached to the
  • the currently recorded operating characteristic quantities are then compared with the previously determined descriptions of the operating characteristic pattern, which are assigned to various errors, for predictive diagnosis of faults in the motor vehicle.
  • certain operating parameters take on certain values that for are characteristic of the respective error.
  • the prediction of errors in the motor vehicle can be combined with a statement about the reliability of the prediction, i.e. about the probability that the predicted error can actually be expected in the future. The closer the error occurs, the more reliably the error can be predicted.
  • the method according to the invention enables the predictive detection of errors in a motor vehicle even before the error has occurred and before major damage or consequential errors have occurred.
  • a specific operating characteristic pattern be assigned to a specific error on the basis of operating characteristics recorded in several motor vehicles.
  • This further development assumes that a specific fault occurs in several motor vehicles (usually different ones) Points in time) occurs. For this reason, the operating parameters, including the diagnosed error, recorded before the occurrence of a specific error are transferred to a central error memory external to the vehicle.
  • the operating parameters are one in the fault memory
  • an operating parameter pattern to which this error is assigned is determined in the vehicle-external error memory.
  • the operating parameters of a defective motor vehicle are compared with the operating parameters of those motor vehicles that do not have this error.
  • the operating parameter patterns associated with a specific error can be compared with one another for similarity or correspondence.
  • Various algorithms and methods from the field of data mining or knowledge discovery known from the prior art can be used for this.
  • the same time period is advantageously used as a basis for the comparison of the operating parameters, ie all operating parameters are standardized to the same relative time base.
  • the aim of determining the farm parameter pattern from the recorded farm parameters is to clarify which farm parameter and farm parameter combinations allow unambiguous characterization of a particular error, which mathematical relationship exists between the individual farm parameters and from which point The point in time before the occurrence of a certain error, the characteristic operating parameters can be observed.
  • the same operating parameters be recorded in the motor vehicles of a certain type. If, for example, the function of the internal combustion engine is monitored in a motor vehicle, the same operating parameters are preferably recorded in the motor vehicles with the same internal combustion engine type. As a result, the operating parameters of a plurality of motor vehicles of the same type can be better compared with one another in order to determine the operating parameter pattern.
  • the recorded operating parameters, the information for characterizing the operating parameters and the errors that have occurred in motor vehicles of a certain type are transmitted to a fault memory arranged outside the motor vehicles and stored there.
  • the vehicle-external fault memory is connected, for example, via a data network to workshops in which the motor vehicles are serviced. In the workshops, the operating parameters are read out from the individual motor vehicles and transmitted to the fault memory external to the vehicle. Since the operating parameters and the errors that have occurred in a large number of motor vehicles are combined in the vehicle-external error memory, they can be processed together there.
  • the operating parameters are advantageously transmitted from the individual motor vehicles to the fault memory external to the vehicle by means of wireless transmission methods.
  • a specific operating characteristic pattern be assigned to a specific fault on the basis of the operating characteristics stored in the fault memory external to the vehicle.
  • trivial relationships be eliminated from the descriptions of the operating characteristic patterns. For example, the fact that the associated operating characteristic value disappears or lies outside an expected range is called trivial if a sensor fails.
  • Such trivial correlations are eliminated in the course of the determination of the descriptions of the operational characteristic patterns, since the operational characteristic patterns are determined with the aim of establishing non-trivial correlations between the operational characteristics and errors that have occurred.
  • Non-trivial relationships are, for example, unexpected or difficult or impossible to model relationships.
  • redundant and unnecessary information can be eliminated from the operating characteristic patterns.
  • Relationship between an operating characteristic pattern and the occurrence of a specific error is mapped as a rule.
  • the correlations obtained through the analysis of the operational parameters are shown in the form of rules or algorithms.
  • the rules describe which characteristic curves or combinations of characteristic curves lead to a specific error.
  • the rules also describe the period in which this characteristic operating characteristic pattern can be observed before the error occurs.
  • Diagnostic device that is, for example, in a workshop.
  • the ascertained descriptions of the operating characteristic size patterns are transmitted from the vehicle-external fault memory to an in-vehicle diagnostic device of the motor vehicle, the operating characteristic values currently recorded being compared in the vehicle-internal diagnostic device with the descriptions of the operating characteristic size patterns ,
  • the currently recorded operating parameters are compared with the rules or the functions are applied to them.
  • the predictive diagnosis can be carried out while the motor vehicle is traveling.
  • the currently recorded operating parameters be transmitted from the motor vehicle to a vehicle-external diagnostic device which has access to the vehicle-external fault memory, the currently recorded operating parameters being compared in the vehicle-external diagnostic device with the descriptions of the operating parameter models.
  • the currently recorded operating parameters are based on the rules compared or the functions are applied to them.
  • the invention proposes a diagnostic device for predictive detection of errors in a motor vehicle, which has means for carrying out the method according to claim 8 or 9.
  • a diagnostic device can be arranged inside the motor vehicle, for example as part of a control device of the motor vehicle, or outside the motor vehicle in a workshop.
  • Fig. 2 is a flowchart for empirically determining
  • FIG. 1 shows the inventive method for predictive detection of errors in a motor vehicle 7.1, 7.2 to 7.m according to a preferred embodiment.
  • the process essentially consists of five steps.
  • a first step 1.1, 1.2 to ln operating parameters and information for characterizing the operating parameters over a certain period of time are recorded in a plurality of motor vehicles 6.1, 6.2 to 6.n and stored in the motor vehicles 6.1, 6.2 to 6.n.
  • the motor vehicles 6.1, 6.2 to 6.n and the motor vehicles 7.1, 7.2 to 7.m can be the same, partial quantities or else different motor vehicles, which, however, are expediently of the same type.
  • the operating parameters and information for characterizing the operating parameters stored in the motor vehicle 6.1, 6.2 to 6.n, in particular in the period before the error occurs, are in a second step 2.1, 2.2 to 2.n to an external error memory 8.
  • an analysis of the operating parameters is then carried out in a third step 3 with the aim of establishing a characteristic operating parameter pattern for the errors that have occurred in the motor vehicle 6.1, 6.2 to 6.n. identify and describe it in a suitable form.
  • a characteristic operating characteristic pattern is assigned to each error that occurs during driving operation in one of the motor vehicles 6.1, 6.2 to 6.n and is described in a suitable manner.
  • the description can be illustrations by rules or mathematical functions such as products or foldings.
  • a fourth step 4.1, 4.2 to 4.m the Transfer descriptions of the operating characteristic patterns to a large number of motor vehicles 7.1, 7.2 to 7.m.
  • these motor vehicles 7.1, 7.2 to 7.m during the driving operation, in a fifth step 5.1, 5.2 to 5.m, the operating parameters with the individual are currently recorded
  • steps 1 to 3 are shown in FIG. 2 for one of motor vehicles 6.1, 6.2 to 6.n as a flow chart.
  • current operational parameters are recorded in function block 10 over a certain period of time, which can vary from motor vehicle to motor vehicle.
  • Operating parameters are understood to be all information that describes the state of the motor vehicle 6.1, 6.2 to 6.n and its environment. These are, for example, signals from sensors located in the motor vehicle (characteristic data of the internal combustion engine or the driving dynamics of the motor vehicle) or from the ambient sensor system of the motor vehicle (temperature, moisture content or dust content of the ambient air). In addition, information about the characterization of the operational parameters, for example the state of systems including occurring error codes and the date, time and / or location of the operational parameters, is also recorded.
  • the acquired operating parameters and information are stored in a function block 11 for the purpose of a later one
  • the recorded operating parameters are stored, for example, in the form of an operating parameter matrix, the individual vectors corresponding to different operating parameters and the individual vector elements corresponding to the values of the operating parameters at specific times.
  • a query block 12 checks whether an error m has occurred in the motor vehicle during the operation of the motor vehicle 6.1, 6.2 to 6.n. The error can be, for example, the failure of a specific component or an unusual signal from a specific sensor. If no error is detected, the process branches back to the function block 10 for recording further operating parameters. If an error has occurred, the acquired operating parameter matrix and information relating to the error (type, time, etc.) are transferred to the external error memory 8 in a function block 13.
  • Steps 1 and 2 according to blocks 10 to 13 are carried out in a motor vehicle 6.1, 6.2 to 6.n.
  • step 3 described below is carried out in an external computer unit 9 which has access to the external error memory 8.
  • the error that has occurred is diagnosed in the subsequent function blocks 14 to 18, and a so-called operational parameter is obtained from the operating parameters recorded before the error occurred
  • the values of the operating parameter matrix assigned to the error are compared with the values of error-free operating parameter matrices.
  • the error-free operating parameter matrices originate from the subset of motor vehicles 6.1, 6.2 to 6.n in which this error has not occurred and which have likewise transferred their operating parameter matrices to the error memory 8.
  • an operating characteristic pattern which is characteristic of the error that has occurred and is assigned to this error is then created in function block 15.
  • the relationship between the operating characteristic pattern and the occurrence of an error is described in a suitable form in function block 16. To describe the relationship, it can be represented in the form of rules or represented by mathematical functions (e.g. folds or products).
  • Diagnostic device 18 can, as shown in Fig. 1, as vehicle-internal diagnostic devices in the motor vehicles 7.1, 7.2 to 7.n.
  • the operating parameters currently recorded in motor vehicles 7.1, 7.2 to 7.n are compared in the vehicle-internal diagnostic device with the descriptions of the error-characteristic operating parameter patterns.
  • the predictive diagnosis can be carried out while the motor vehicle 7.1, 7.2 to 7.n is traveling.
  • a diagnostic device 18 be designed as a diagnostic device external to the vehicle, which is located in a workshop, for example. Then the currently recorded operating parameters are transmitted from the motor vehicle 7.1, 7.2 to 7.n to the vehicle-external diagnostic device, which has access to the vehicle-external fault memory 8. The currently recorded operating parameters are compared in the vehicle-external diagnostic device with the descriptions of the error-characteristic operating parameters. In this embodiment, the predictive diagnosis can be carried out, for example, in a workshop.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing And Monitoring For Control Systems (AREA)
  • Control Of Electric Motors In General (AREA)
  • Debugging And Monitoring (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

L'invention concerne un procédé de reconnaissance de défauts d'un véhicule automobile (7.1, 7.2 à 7.m), selon lequel, des grandeurs caractéristiques de fonctionnement d'un véhicule automobile (6.1, 6.2 à 6.n) et des informations permettant la caractérisation desdites grandeurs caractéristiques de fonctionnement sont détectées sur une période prédéterminée. Pour qu'il soit possible d'avoir une reconnaissance prédictive de défauts du véhicule automobile (7.1, 7.2 à 7.m), il est proposé de mettre en oeuvre un procédé comportant les étapes suivantes: établissement, à partir des grandeurs caractéristiques de fonctionnement détectées avant l'apparition d'un certain défaut dans le véhicule (6.1; 6.2 à 6.n), d'un modèle de grandeurs caractéristiques de fonctionnement qui est associé au défaut; description du modèle de grandeurs caractéristiques de fonctionnement sous une forme adaptée (règles et/ou fonctions mathématiques); et comparaison des grandeurs caractéristiques de fonctionnement détectées pendant le fonctionnement du véhicule automobile (7.1; 7.2 à 7.m) avec les descriptions des modèles de grandeurs caractéristiques de fonctionnement qui sont caractéristiques d'un défaut.
EP00987027A 1999-12-09 2000-10-26 Procede de reconnaissance de defauts d'un vehicule automobile Ceased EP1153368A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19959526 1999-12-09
DE19959526A DE19959526A1 (de) 1999-12-09 1999-12-09 Verfahren zum Erkennen von Fehlern eines Kraftfahrzeuges
PCT/DE2000/003778 WO2001043079A1 (fr) 1999-12-09 2000-10-26 Procede de reconnaissance de defauts d'un vehicule automobile

Publications (1)

Publication Number Publication Date
EP1153368A1 true EP1153368A1 (fr) 2001-11-14

Family

ID=7932104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00987027A Ceased EP1153368A1 (fr) 1999-12-09 2000-10-26 Procede de reconnaissance de defauts d'un vehicule automobile

Country Status (6)

Country Link
US (1) US6766232B1 (fr)
EP (1) EP1153368A1 (fr)
JP (1) JP2003516275A (fr)
KR (1) KR100741647B1 (fr)
DE (1) DE19959526A1 (fr)
WO (1) WO2001043079A1 (fr)

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Also Published As

Publication number Publication date
KR20010108191A (ko) 2001-12-07
KR100741647B1 (ko) 2007-07-24
JP2003516275A (ja) 2003-05-13
DE19959526A1 (de) 2001-06-13
WO2001043079A1 (fr) 2001-06-14
US6766232B1 (en) 2004-07-20

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