A method for checking a fault circuit of an automobile electrical appliance

Abstract

The present invention provides a method for checking a fault circuit of an automobile electrical appliance. The method standardizes the DTC data of a vehicle model to be developed, creates a corresponding logical relationship between DTC and a functional circuit from the fault diagnosis of a vehicle model under development in history, establishes an association logic between a functional circuit name and a functional circuit graphic element in a system schematic diagram, and establishes a corresponding relationship between DTC standard data, a functional circuit name, and a system schematic diagram of the vehicle model to be developed. When checking the fault circuit where the DTC is located, the system schematic diagram graphic associated with the DTC data can be automatically retrieved based on the corresponding relationship among the created DTC standard data, the functional circuit name, and the system schematic diagram, and the graphic elements of the fault circuit where each DTC is located in the system schematic diagram are illuminated to assist in completing the DTC fault diagnosis. The method solves the problem that the existing automobile DTC reporting code requires manual viewing of multiple system schematic diagrams, which makes it inconvenient to accurately and efficiently locate the fault component and troubleshoot the cause.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile fault diagnosis, and more specifically, to a method for checking an automobile electrical appliance fault circuit. Background Art

[0002] In the field of automobile fault diagnosis, the automobile system schematic diagram can not only clearly display the composition structure of the automobile systems, the connection relationship between components and the working principle, but also help locate the location and cause of the fault by viewing the system schematic diagram when the automobile fails.

[0003] When DTC reports a code, in the traditional fault diagnosis and cause troubleshooting method, maintenance technicians are generally required to view multiple system schematics at the same time to identify the fault circuit information of each fault, which is not convenient for accurate and efficient fault component location and cause troubleshooting. In order for maintenance technicians to accurately and efficiently view the fault circuit information and achieve rapid diagnosis, a method for viewing the fault circuit of automotive electrical appliances is proposed. Summary of the invention

[0004] The present invention provides a method for checking a fault circuit of an automobile electrical appliance, so as to solve the problem that the existing automobile DTC code reporting requires manual checking of multiple system schematic diagrams, which makes it inconvenient to accurately and efficiently locate the faulty component and troubleshoot the cause.

[0005] According to one aspect of the present invention, a method for checking a fault circuit of an automobile electrical appliance is provided, comprising the following steps:

[0006] Extract the basic information of DTC data according to the DTC reference data of the vehicle model to be developed, and standardize the basic information of DTC data to form a DTC standard database;

[0007] Create a fault circuit library to store vehicle model information, controller name, diagnostic process name, function circuit information, DTC standard data, and circuit diagrams extracted from the fault diagnosis manual of historical development vehicles;

[0008] Create the correspondence between DTC standard data and functional circuits from the fault diagnosis of historical development models;

[0009] Create an electrical function circuit library to store the information of each function circuit in the system schematic diagram;

[0010] Establish the association logic between the function loop name and the function loop graphic elements in the system schematic diagram;

[0011] Create a function circuit search rule. First, use the standard meaning information of the DTC of the vehicle to be developed to search for all function circuit sets corresponding to the DTC with the same standard meaning in the fault circuit library. Then, match the found function circuit with the function circuit information created for the vehicle to be developed to determine the corresponding relationship between the vehicle to be developed and the function circuit.

[0012] Based on the correspondence between the DTC standard data and the functional circuits of the vehicle to be developed, and the correspondence between the primary function names, secondary function names and the functional circuits contained in the system schematic diagram, the correspondence between the DTC standard data, the functional circuit names and the system schematic diagram of the vehicle to be developed is established;

[0013] Based on the correspondence between the created DTC standard data, function circuit name, and system schematic diagram, the system schematic diagram graphics associated with the DTC data are automatically retrieved, and the graphic elements of the fault circuit where each DTC is located in the system schematic diagram are lit to assist in completing DTC fault diagnosis.

[0014] Preferably, based on the above solution, the basic information of the DTC data includes the DTC code, sub-product system, controller name, controller supplier, controller version, and fault code meaning.

[0015] Based on the above scheme, it is preferred to create an electrical function circuit library for storing the information of each function circuit in the system schematic diagram, specifically including: in the process of developing the system schematic diagram, according to the functional principle content and function splitting description required to be explained in the system schematic diagram, define the first-level function name and the second-level function name under the first-level function split;

[0016] According to the primary function name or secondary function name, create the names of the functional circuits and their information, connector information, wiring harness information, fuse / relay information and current / signal direction information in the functional circuit.

[0017] Preferably, based on the above solution, the functional circuit search rule is:

[0018] 1) Through the combination of controller name, sub-product system, reporting factor, reporting subject, signal source-part / area, signal deviation meaning and other elements in the DTC standard meaning information of the model to be developed, match and search for the functional circuit set with the same DTC standard data elements in the fault circuit library within the same brand, and then search across brands;

[0019] 2) Extract vehicle model information, function circuit name, part name, part number, pin function set, connector code and pin relationship set from the function circuit of the vehicle model to be developed;

[0020] The information set extracted from the functional circuit of the vehicle to be developed is further matched with the functional circuit information of the DTC with the same standard meaning matched and found in 1) to determine the corresponding relationship between the vehicle to be developed and the functional circuit.

[0021] Based on the above scheme, when the DTC standard data corresponding to the fault circuit involves multiple system schematic diagrams, the system schematic diagram with the largest number of functional circuits in the DTC standard data corresponding to the fault circuit is displayed in the center as the main diagram, and the other system schematic diagrams are reduced to sub-diagrams for display. The positional relationship between each sub-diagram and the main diagram is arranged according to the positional relationship between the components included in the functional circuit and the components of the main diagram. Click the sub-diagram to switch to view the complete fault circuit of the DTC.

[0022] A method for checking a fault circuit of an automobile electrical appliance of the present invention standardizes the DTC data of a vehicle model to be developed, creates a corresponding logical relationship between DTC and a functional circuit from the fault diagnosis of a historically developed vehicle model, establishes an association logic between a functional circuit name and a functional circuit graphic element in a system schematic diagram, creates a corresponding relationship between the standardized DTC data and the functional circuit of the vehicle model to be developed, and establishes a corresponding relationship between the DTC standard data, the functional circuit name, and the system schematic diagram of the vehicle model to be developed, so that when checking the fault circuit where the DTC is located, the system schematic diagram graphic associated with the DTC data can be automatically retrieved based on the corresponding relationship between the created DTC standard data, the functional circuit name, and the system schematic diagram, and the graphic elements of the fault circuit where each DTC is located in the system schematic diagram are lit up to assist in completing the DTC fault diagnosis. DETAILED DESCRIPTION

[0023] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0025] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0026] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below. Obviously, the following description is only some embodiments of the present invention, and for those of ordinary skill in the art, other implementation methods can also be obtained without creative work.

[0029] A method for checking a fault circuit of an automobile electrical appliance of the present invention comprises the following steps:

[0030] Step A1, standardization of DTC data of the vehicle model to be developed; Step A2, extraction of fault diagnosis element information of historical vehicle models; Step A3, recommendation of the relationship between DTC and functional circuit of the vehicle model to be developed; Step A4, establishment of the correspondence between DTC and system schematic diagram; Step A5, checking of fault circuit.

[0031] Among them, step A1, standardization of DTC data of the vehicle model to be developed, specifically includes:

[0032] According to the DTC reference materials of the vehicle model to be developed, the basic information of DTC data is extracted from the DTC reference materials, where the basic information of DTC data specifically includes DTC code, sub-product system, controller name, controller supplier, controller version, and fault code meaning.

[0033] Based on the extracted basic information of DTC data, DTC standard meaning information is created, where the DTC standard meaning information includes: reporting factor (used to store signals converted by voltage, resistance, and current as specified in the fault code meaning (for example, temperature, rainfall position, liquid level, speed signal, etc.) or basic physical quantities as specified in the fault code meaning), signal deviation meaning (characters used to indicate functional failure or fault phenomenon in the fault code meaning), signal source information (non-component, function, and system information described in the fault code meaning), reporting body (controller information used to explain fault code storage and perform logical judgment), signal deviation level (level information specified in the fault code meaning) and severity (level of severity of consequences caused by the fault code), thus completing the standardized processing of DTC data.

[0034] Step A2, extracting historical vehicle model fault diagnosis factor information;

[0035] Create a fault circuit library to store vehicle model information, controller name, diagnostic process name, functional circuit information (extracted from wiring harness drawings, vehicle electrical schematics, fuse box schematics and other materials, including all component information, connector information, wiring harness information, fuse / relay information and other elements used to realize a certain electrical function on the vehicle, as well as current / signal direction information in the functional circuit), DTC standard data, circuit diagrams and other information extracted from historically developed vehicle model fault diagnosis manuals.

[0036] Create the correspondence between DTC standard data and functional circuits from historical development vehicle fault diagnosis.

[0037] Step A3, recommending the relationship between DTC and functional circuit of the vehicle model to be developed;

[0038] Create an electrical function circuit library to store the information of each function circuit in the system schematic diagram.

[0039] During the system schematic development process, the first-level function name and the second-level function name under the first-level function split are defined according to the functional principle content to be explained and the necessity of functional split description.

[0040] According to the primary function name or the secondary function name, the names of the functional circuits contained in the primary function name or the secondary function name and their information are created respectively (i.e., based on the wiring harness drawing, the vehicle schematic, the fuse box schematic and other materials, all the component information (part number, part name), connector information (connector coding, pin number, pin function), wiring harness information (wire number, wire color, wire diameter), fuse / relay information (fuse / relay name, number, fuse / relay pin number) and other elements used to realize a certain electrical function on the vehicle are extracted, as well as the current / signal direction information in the functional circuit).

[0041] Establish the association logic between the function loop name and the function loop graphic elements in the system schematic diagram.

[0042] Step A4, constructing the corresponding relationship between DTC standard data and system schematic diagram;

[0043] Create a function circuit search rule. First, use the standard meaning information of the DTC of the model to be developed to search for all function circuit sets corresponding to the DTC with the same standard meaning in the fault circuit library. Then, match the found function circuit with the function circuit information created for the model to be developed to determine the correspondence between the model to be developed and the function circuit. The specific search rules are as follows:

[0044] 1) By combining the controller name, sub-product system, reporting factor, reporting subject, signal source-part / area, signal deviation meaning and other elements in the DTC standard meaning information of the model to be developed, first match and search for the functional circuit set with the same DTC standard data elements in the fault circuit library within the same brand, and then search across brands;

[0045] 2) Extract the vehicle model information, the function circuit name, the part name in the function circuit, the part number, the pin function set, the connector code and the pin relationship set and other information sets from the function circuit of the vehicle model to be developed created in step 2.2;

[0046] The information set extracted from the functional circuit of the vehicle to be developed is further matched with the functional circuit information of the DTC with the same standard meaning matched and found in 1) to determine the corresponding relationship between the vehicle to be developed and the functional circuit.

[0047] Based on the correspondence between the DTC standard data and the functional circuits of the vehicle to be developed, and the correspondence between the primary function names, secondary function names and the functional circuits contained in the system schematic diagram, the correspondence between the DTC standard data, the functional circuit names and the system schematic diagram of the vehicle to be developed is established;

[0048] When checking the fault circuit where the DTC is located, check the correspondence between the DTC standard data, functional circuit name, and system schematic diagram created in the interface, automatically call up the system schematic diagram graphic associated with the DTC data, and light up the graphic elements of the fault circuit where each DTC is located in the system schematic diagram (the fault circuit is composed of one or more functional circuit information. When multiple functional circuit information is combined, duplicate line information is de-duplicated and merged) to assist in completing DTC fault diagnosis.

[0049] Among them, when the DTC corresponding fault circuit involves multiple system schematic diagrams, the system schematic diagram with the largest number of functional circuits in the DTC corresponding fault circuit will be displayed in the center as the main diagram, and other system schematic diagrams will be reduced to sub-diagrams for display. The position relationship between each sub-diagram and the main diagram is arranged according to the position relationship between the components included in the functional circuit and the components of the main diagram. Click the sub-diagram to switch to view the complete fault circuit of DTC.

[0050] It should be noted that the detailed steps of the standardized processing of DTC data in step A1 of the present invention are as follows:

[0051] Step 31, standardize the format and extract basic information from the DTC original data to form a standard dictionary table;

[0052] Specifically, a DTC data processing module is constructed for standardizing DTC data, and the processing module includes two operation permissions: a data processing end and a data review end; a DTC standard data storage module is constructed for storing DTC standard data that takes effect after standardization processing.

[0053] The processing module adapts the DTC reference data with standardized format and automatically extracts basic information, where the basic information includes: DTC code, sub-product system to which the DTC code belongs, controller name, controller supplier, controller version, fault code meaning and other basic DTC data information.

[0054] The extracted information is formed into a standard dictionary table in a standard format. The data metadata in the standard dictionary table includes: DTC code, sub-product system to which the DTC code belongs, controller name, controller supplier, controller version, and fault code;

[0055] Step 32, extracting basic information of each field from the DTC data of the vehicle model to be developed to form a business data meta information table;

[0056] Step 33, create a comparison rule, compare the business data meta information table with the DTC elements in the standard dictionary table, and determine the standardization task;

[0057] The DTC data to be standardized of the development vehicle model is imported into the processing module, and the DTC data comparison rules are set in the processing module to create the DTC data standardization task.

[0058] Match the DTC code, sub-product system, controller name, fault code meaning and other information of the DTC data to be standardized with the DTC standard data (including: DTC code, sub-product system, controller name, controller vendor, controller version number, fault code meaning, DTC standard meaning and other information) that has been standardized in the storage module, and create DTC data standardization tasks according to the matching situation:

[0059] A1. If the DTC code, sub-product system, controller name, and fault code meaning information are the same, it means that the DTC data has been standardized and there is no need to create a new DTC data standardization task;

[0060] A2. For controller names, DTC codes, and fault code meaning information that are the same, the processing module references the DTC standard meaning information in the matching DTC standard data in the storage module and marks it as "reference", generating the corresponding DTC data standardization task;

[0061] A3. If the controller name and fault code meaning information are the same, the processing module references the DTC standard meaning information in the matching DTC standard data in the storage module and marks it as "reference", and generates the corresponding DTC data standardization task;

[0062] A4. If the controller name and DTC code are the same, the processing module borrows the DTC standard meaning information in the matching DTC standard data in the storage module and marks it as "pending confirmation", and generates the corresponding DTC data standardization task;

[0063] A5. If at least one of the controller names, DTC codes or fault code meaning elements is the same, the processing module borrows the DTC standard meaning information in the matching DTC standard data in the storage module and marks it as "to be modified", and generates the corresponding DTC data standardization task;

[0064] A6. If the information is not the same, the DTC data will be marked as "newly developed".

[0065] Step 34, based on the standardized tasks, create standardized operating rules, and complete the creation of reporting factors, signal deviation meanings, signal source information, reporting subjects, signal deviation levels, severity and other information to complete the DTC data standardization.

[0066] The standardized operation rules in step 34 are:

[0067] B1: The DTC standard meaning information marked as "reference" does not need to be modified and can be submitted for review directly;

[0068] B2, for the DTC standard meaning information marked as "to be confirmed" or "to be modified", the recommended DTC standard meaning information is confirmed or modified according to the DTC information processing standard;

[0069] B3, for those marked as "newly developed", create DTC standard meaning information such as reporting factor, signal deviation meaning, signal source information (parts, areas), reporting subject, signal deviation level, severity, etc. based on the basic information of DTC data extracted in step 1.

[0070] In B3, based on the basic information of DTC data extracted in step 1, DTC standard meaning information such as reporting factor, signal deviation meaning, signal source information (parts, areas), reporting subject, signal deviation level, severity, etc. is created. After the created information is reviewed and effective by the data review end, it is stored in the storage module to complete the DTC standardization processing of the vehicle model to be developed.

[0071] The specific "newly developed" DTC information processing standards are as follows:

[0072] 1) Creation of reporting subject information

[0073] The reporting code body is the controller information used to describe the fault code storage and perform logical judgment.

[0074] 2) Creation of reporting factor information

[0075] Create a reporting factor database to store information such as signals converted through voltage, resistance, and current that are clearly defined in the meaning of the fault code (for example, temperature, rainfall position, liquid level, speed signal, etc.) or basic physical quantities that are clearly defined in the meaning of the fault code (for example, voltage, current, resistance, phase, power, axle load, frequency, yaw rate, pressure, etc.).

[0076] 3) Signal source information creation

[0077] The data processing end selects the signal source - part information associated with the DTC fault from the vehicle parts database based on the part information expressed in the meaning of the fault code. If there is no suitable general part name, a new one will be created.

[0078] The data processing end creates signal source-area information based on the non-component, function, and system information expressed in the meaning of the fault code.

[0079] 4) Creation of information on the meaning of signal deviation

[0080] The processing module automatically extracts characters from the meaning of the fault code that are used to indicate a functional failure or a fault phenomenon.

[0081] 5) Signal deviation level information creation

[0082] The processing module automatically imports the fault code meaning information extracted from the DTC data, and the data processing end deletes the fault code meaning information and retains the level information that has been clearly defined in the fault code meaning.

[0083] For example: If the fault code meaning is described as: clutch overtemperature level 2 fault, then the signal deviation level of the DTC standardized data is: level 2.

[0084] 6) Severity information creation

[0085] The data processing end creates corresponding severity level information based on the consequences caused by the fault code (ranging from affecting driving safety to only providing a warning, and dividing the severity levels).

[0086] A method for checking a fault circuit of an automobile electrical appliance of the present invention standardizes the DTC data of a vehicle model to be developed, creates a corresponding logical relationship between DTC and a functional circuit from the fault diagnosis of a historically developed vehicle model, establishes an association logic between a functional circuit name and a functional circuit graphic element in a system schematic diagram, creates a corresponding relationship between the standardized DTC data and the functional circuit of the vehicle model to be developed, and establishes a corresponding relationship between the DTC standard data, the functional circuit name, and the system schematic diagram of the vehicle model to be developed, so that when checking the fault circuit where the DTC is located, the system schematic diagram graphic associated with the DTC data can be automatically retrieved based on the corresponding relationship between the created DTC standard data, the functional circuit name, and the system schematic diagram, and the graphic elements of the fault circuit where each DTC is located in the system schematic diagram are lit up to assist in completing the DTC fault diagnosis.

[0087] Finally, the method of the present application is only a preferred implementation scheme and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for checking a fault circuit of an automobile electrical appliance, characterized in that: The following steps are included: Extract the basic information of DTC data according to the DTC reference data of the vehicle model to be developed, and standardize the basic information of DTC data to form a DTC standard database; Create a fault circuit library to store vehicle model information, controller name, diagnostic process name, function circuit information, DTC standard data, and circuit diagrams extracted from the fault diagnosis manual of historical development vehicles; Create the correspondence between DTC standard data and functional circuits from the fault diagnosis of historical development models; Create an electrical function circuit library to store the information of each function circuit in the system schematic diagram; Establish the association logic between the function loop name and the function loop graphic elements in the system schematic diagram; Create a function circuit search rule. First, use the standard meaning information of the DTC of the vehicle to be developed to search for all function circuit sets corresponding to the DTC with the same standard meaning in the fault circuit library. Then, match the found function circuit with the function circuit information created for the vehicle to be developed to determine the corresponding relationship between the vehicle to be developed and the function circuit. Based on the correspondence between the DTC standard data and the functional circuits of the vehicle to be developed, and the correspondence between the primary function names, secondary function names and the functional circuits contained in the system schematic diagram, the correspondence between the DTC standard data, the functional circuit names and the system schematic diagram of the vehicle to be developed is established; Based on the correspondence between the created DTC standard data, function circuit name, and system schematic diagram, the system schematic diagram graphics associated with the DTC standard data are automatically retrieved, and the graphic elements of the fault circuit where each DTC is located in the system schematic diagram are illuminated to assist in completing DTC fault diagnosis; The basic information of the DTC data includes DTC code, sub-product system, controller name, controller supplier, controller version, and fault code meaning; Create an electrical function circuit library to store the information of each function circuit in the system schematic diagram, including: in the process of developing the system schematic diagram, according to the functional principle content and function splitting description required by the system schematic diagram, define the first-level function name and the second-level function name under the first-level function split; According to the primary function name or secondary function name, create the names of the functional circuits and their information, connector information, wiring harness information, fuse / relay information and current / signal direction information in the functional circuit.

2. A method for checking a faulty circuit of an automobile electrical appliance as claimed in claim 1, characterized in that: The functional loop search rule is: 1) Through the combination of the controller name, sub-product system, reporting factor, reporting subject, signal source-part / area, and signal deviation meaning in the DTC standard meaning information of the model to be developed, match and search for the functional circuit set with the same DTC standard data elements in the fault circuit library within the same brand, and then search across brands; 2) Extract vehicle model information, function circuit name, part name, part number, pin function set, connector code and pin relationship set from the function circuit of the vehicle model to be developed; The information set extracted from the functional circuit of the vehicle to be developed is further matched with the functional circuit information of the DTC with the same standard meaning matched and found in 1) to determine the corresponding relationship between the vehicle to be developed and the functional circuit.

3. A method for checking a faulty circuit of an automobile electrical appliance as claimed in claim 2, characterized in that: When the fault circuit corresponding to the DTC standard data involves multiple system schematic diagrams, the system schematic diagram with the largest number of functional circuits in the fault circuit corresponding to the DTC standard data will be displayed in the center as the main diagram, and the other system schematic diagrams will be reduced to sub-diagrams for display. The positional relationship between each sub-diagram and the main diagram is arranged according to the positional relationship between the components included in the functional circuit and the components of the main diagram. Click the sub-diagram to switch to view the complete fault circuit of the DTC.