JP4863091B2 - Defect data recording device and defect data recording program - Google Patents

Description

  The present invention relates to a defect data recording apparatus and a defect data recording program for recording data representing a state of a target device as defect data when a defect occurs in the target device.

  Until now, for example, in the field of vehicle drive control devices, when a failure occurs in a vehicle or a vehicle drive device as a target device, a failure data recording device that records data representing the state of the target device as failure data Is already known. As such a defect data recording apparatus, for example, the apparatus described in Patent Document 1 below discloses the following configuration. That is, when a malfunction occurs in the vehicle drive device, this apparatus records malfunction data of preset storage items (corresponding to the record items of the present application) in the EEPROM in order to determine the cause of the malfunction. To do. For this reason, in this apparatus, data for each preset storage item is sampled at a predetermined sampling interval and recorded while being repeatedly overwritten in the ring buffer. Then, this device performs a detection process for detecting that a failure has occurred in the vehicle drive device, and when a failure has occurred, records the data in the ring buffer in the EEPROM as failure data.

JP 2004-201421 A

  By the way, in the above-described conventional apparatus, recording conditions such as storage items of defective data recorded in the EEPROM and sampling intervals are set in advance by a setting computer or the like. Usually, in such a recording condition setting stage, it is difficult to predict what kind of trouble occurs in the target apparatus. On the other hand, when trying to record in detail the defect data that can be effectively used for all the defects that may occur in the target device, a large recording capacity is required for a recording medium such as an EEPROM, which increases the price of the device. . For this reason, until now, only major items etc. for the entire target device have been selected and widely used so that defect data that can be effectively used for any of various failures that may occur in the target device can be recorded. Recording conditions were set so as to record data shallowly. However, with such recording condition settings, the content of the defect data may not be sufficient to analyze the cause and status of the defect in detail, and more detailed defect data related to the problem that occurred And there is a demand to record.

  The present invention has been made in view of the above problems, and its purpose is to record in detail failure data that can be effectively used for analysis of a failure that has occurred without greatly expanding the recording capacity of the failure data. An object of the present invention is to provide a defect data recording apparatus and a defect data recording program that can be used.

According to the present invention for achieving the above object, when a malfunction occurs in the target device, the characteristic configuration of the malfunction data recording device that records data representing the state of the target device as malfunction data is a preset malfunction. Data including failure data recording means for recording the failure data in accordance with recording conditions, and failure occurrence history data that is data on the number of occurrences for each of a plurality of failure items that define the failures that may occur in the target device. , History data recording means for recording operation history data, which is data representing the operation history of the target device, and specifying, as the attention attribute, a defect attribute related to a defect that is most likely to occur next based on the operation history data And the recording condition for recording the defect data corresponding to the attention attribute is the defect recording condition. Recording condition setting means for setting, a defect item table that defines the defect attribute to which each of the plurality of defect items relates, and a recording condition in which a plurality of recording conditions corresponding to each of the plurality of defect attributes are stored And the recording condition setting means extracts a failure item having the highest occurrence frequency based on the failure occurrence history data, and relates to the extracted failure item based on the failure item table. The defect attribute is determined, the defect attribute is identified as the attention attribute, and when there are a plurality of defect items having the highest occurrence frequency, the priority is determined based on a priority order defined in advance for each defect item. The defect attribute related to the defect item having a higher rank is identified as the attention attribute and stored in the recording condition table. Select multiple recording condition corresponding to the target attribute from the recording conditions, the selected recording condition to the point to be set as the defect recording condition.

According to this characteristic configuration, it is possible to appropriately set and change the defect recording condition, which is a condition for recording defect data, based on the operation history data representing the operation history of the target device. Thus, for example, based on the operation history of the target device, paying attention to the failure most likely to occur next, the failure recording condition is set so that failure data that can be effectively used for analysis of the failure can be recorded. Settings can be changed as appropriate. Therefore, when a defect occurs next time, it is possible to record in detail defect data that can be used effectively to analyze the cause of the defect and the state of occurrence. Also, at this time, based on the operation history data, for example, there is a possibility that the recording capacity that is vacant can be generated next by not recording the defect data related to the defect that is unlikely to occur next. The defect recording condition can be set to be used for recording defect data related to the highest defect. This makes it possible to record in detail the defect data that can be effectively used for the analysis of the defect that has occurred without significantly increasing the recording capacity of the defect data, so it is possible to record defect data that is inexpensive and highly useful. A device can be realized.
Further, according to this configuration, based on the operation history data representing the operation history of the target device, the defect attribute relating to the defect that is most likely to occur next is set as the attention attribute, and an appropriate defect recording is performed according to the attention attribute. Conditions can be set and changed as appropriate. Therefore, when a defect occurs next time, defect data that can be effectively used for the analysis of the defect can be appropriately recorded with high probability.

Furthermore, according to this configuration, only by selecting a recording condition corresponding to the identified attribute of interest from the recording condition table based on the operation history data, it is possible to respond to a defect attribute related to a defect that is most likely to occur next. The recording conditions can be appropriately set as the defect recording conditions.
Further, according to this configuration, since the failure attribute related to the failure item having a large number of past occurrences is specified as the attention attribute based on the failure occurrence history data as the operation history data, the most likely occurrence will occur next. A defect attribute relating to a high defect can be appropriately identified as a notice attribute.
Further, according to this configuration, when the attention attribute is specified based on the number of occurrences of the defect item, it is specified in advance when the attention attribute cannot be specified as one because there are a plurality of defect items having the same number of occurrences. It is possible to appropriately identify one attention attribute based on the assigned priority. Therefore, for example, by defining the priority order of failure items in order of importance to the target device, failure attributes related to failure items with higher importance can be set as attention attributes. Defect recording conditions can be set appropriately so that defect data suitable for analysis of high defects can be recorded.
Further, according to this configuration, it is possible to appropriately determine a defect attribute associated with each of a plurality of defect items that may occur in the target device with reference to the defect item table.

Also, the operation history data includes operation history data is data relating to the operating history of the target device, before type recording condition setting means, on the basis of the operation history data, target operation history of a given said target device When the attribute specifying condition is not satisfied, it is preferable that the target attribute is not specified and the initial recording condition is set as the defect recording condition.

  According to this configuration, based on the driving history data as the operation history data, if the driving history of the target device does not satisfy the predetermined attention attribute specifying condition and is not sufficient to specify the attention attribute, Without specifying, the default recording condition is set as the defect recording condition. Therefore, in such a case, for example, by selecting only main items and the like for the entire target device and setting the failure recording condition so as to record the failure data, various types that can occur in the target device It is possible to record defect data that can be used effectively to some extent for any of the various defects.

  Further, it is preferable that the defect attribute is defined corresponding to each part of the target device.

  According to this configuration, the part of the target device that is most likely to cause a defect next is set as the attention attribute (target part), and an appropriate recording condition is recorded in order to record defect data corresponding to the attention attribute. It can be set as a condition. Therefore, when a defect occurs in any part of the target device, defect data that can be effectively used for analyzing the defect in the part can be appropriately recorded with high probability.

  The recording condition preferably includes a recording item that is an item to be recorded as the defect data.

  According to this configuration, it is possible to appropriately change the setting of a recording item, which is an item to be recorded as defect data, based on the operation history data. Thus, for example, based on the operation history of the target device, paying attention to the failure that is most likely to occur next, the record item can be recorded so that the item of failure data that can be effectively used for the analysis of the failure can be recorded. Can be set. Therefore, when a defect occurs next time, it is possible to appropriately record defect data items that can be effectively used to analyze the cause of the defect and the state of occurrence.

  Further, it is preferable that the recording condition includes a recording trigger which is a trigger condition for recording defect data by the defect data recording means.

  According to this configuration, it is possible to appropriately change the setting of the recording trigger, which is a trigger condition for recording defect data, based on the operation history data. With this, for example, based on the operation history of the target device, pay attention to the failure that is most likely to occur next, and set the recording trigger for the recording condition so that it can be properly grasped that the failure has occurred can do. Therefore, when a defect occurs next time, it is possible to appropriately record the occurrence of the defect and record the defect data.

  Moreover, it is preferable that the recording trigger is configured by one or more defect items selected from a plurality of defect items that are defined for a defect that may occur in the target device.

  According to this structure, the condition of the 1 or 2 or more malfunction item prescribed | regulated about the malfunction which may generate | occur | produce in a target apparatus is used as a recording trigger. As a result, the determination of whether or not the recording trigger condition is satisfied can be performed at the same time as the determination of whether or not the defect related to the defect has occurred. In comparison, it is possible to reduce the load of calculation processing by the defect data recording apparatus.

  Further, it is preferable that the recording condition includes one or both of a sampling interval that is an interval for sampling the defective data and a sampling time that is a time for continuing the sampling.

  According to this configuration, it is possible to appropriately set one or both of the data sampling interval and the sampling time when recording the defect data in accordance with the content of the defect data to be recorded. Therefore, when a defect occurs, it is possible to appropriately record defect data that can be effectively used for analysis of the defect.

  Moreover, it is preferable that the defect data is data of one or more variables representing the state of the target device that changes with the operation of the target device.

  By recording such data as failure data, it is possible to appropriately record data representing the state of the target device when a failure occurs.

  Further, the defect data includes instantaneous data representing the state of the target device at the moment when the defect occurs, and temporal data representing temporal changes in the state of one or both of the target devices immediately before and after the occurrence of the defect. Is preferably included.

  According to this configuration, for the state of the target device when a failure occurs, data that represents in detail both instantaneous data that statically represents the state and time-lapse data that dynamically represents the state, as failure data Can be recorded. Therefore, it is possible to record in detail the defect data that can be effectively used to analyze the cause of the occurrence of the defect and the state of occurrence.

  In addition, the defect data recording means includes a first defect data recording area where the defect data when the defect recording condition is first satisfied is recorded and overwriting is prohibited, and the defect recording condition is satisfied after the second time. It is preferable that the defect data at that time has a second defect data recording area in which the previously recorded defect data is overwritten and recorded.

  According to this configuration, it is possible to record and store both the defect data when the defect recording condition is first established and the defect data when the defect recording condition is finally established. Therefore, it is possible to analyze in detail the cause of occurrence and the state of occurrence of the failure based on both of these failure data.

  Moreover, the malfunction data recording apparatus provided with each said structure can be utilized suitably for what makes a vehicle drive device an object apparatus.

The technical features of the defect data recording apparatus according to the present invention having the above-described configurations can also be applied to a defect data recording method and a defect data recording program. Therefore, the present invention also includes such a method and program. Can be subject to rights. For example, when a failure occurs in the target device, a failure data recording program for recording data representing the state of the target device as failure data records the failure data in a recording unit in accordance with preset failure recording conditions. Data including a failure data recording function and failure occurrence history data that is data of the number of occurrences for each of a plurality of failure items that are defined for failures that may occur in the target device, the operation history of the target device being A history data recording function for recording operation history data, which is data to be represented , in a recording unit, and, based on the operation history data, a defect attribute relating to a defect that is most likely to occur next is identified as a target attribute, and the target attribute setting the recording conditions for recording as the defect recording condition the fault data in accordance with A function, when the setting, on the basis of the fault occurrence history data, extracts the largest defect entry number of occurrences, the problem item table defining the defect attributes, each of the plurality of defect entries associated And determining the defect attribute related to the extracted defect item, specifying the defect attribute as the attention attribute, and when there are a plurality of defect items having the highest occurrence count, The defect attribute related to the defect item having a higher priority is specified as the attention attribute based on a predetermined priority order, and a plurality of recording conditions corresponding to each of the plurality of defect attributes are stored. Based on the recording condition table, the recording condition corresponding to the attribute of interest is selected from the plurality of recording conditions, and the selection is performed. A recording condition setting function of setting a recording condition as the defect recording condition, to realize the computer. Needless to say, such a malfunction data recording program can also obtain the effects of the malfunction data recording apparatus described above, and it is also possible to incorporate some additional techniques mentioned as examples of suitable configurations thereof. is there.

  Embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a case where the defect data recording apparatus 1 according to the present invention is applied to an apparatus that records the defect data 60 of the vehicle drive device 20 will be described as an example. In other words, in the present embodiment, the target device for recording the defect data 60 by the defect data recording device 1 is the vehicle drive device 20. FIG. 1 is a block diagram showing a schematic configuration of a defect data recording apparatus 1 according to the present embodiment. As shown in the figure, the defect data recording apparatus 1 includes a control unit 10 that performs various arithmetic processes as a central configuration. Furthermore, in the present embodiment, the control unit 10 is configured to also control the vehicle drive device 20. The defect data recording device 1 is a device that records data representing the state of the vehicle drive device 20 as the failure data 60 when a failure occurs in the vehicle drive device 20 as the target device. The defect data recording device 1 records the operation history data 50 representing the operation history of the vehicle drive device 20 and records the defect data 60 based on the operation history data 50. By appropriately changing the setting 70, it is possible to record in detail the defect data 60 that can be effectively used for analyzing the occurred defect without increasing the capacity of the recording areas 61 and 62 of the defect data 60. ing. Hereinafter, the configuration of each unit of the defect data recording apparatus 1 according to the present embodiment will be described in detail.

1. Vehicle drive device (target device)
First, the vehicle drive device 20 as a target device in the defect data recording device 1 will be described. As shown in FIG. 1, the vehicle drive device 20 transmits and receives control signals to and from the control unit 10 of the defect data recording device 1 and operates based on the control signals from the control unit 10. FIG. 2 is a schematic diagram showing an example of a specific configuration of the vehicle drive device 20. The vehicle drive device 20 includes an engine E and two motor / generators MG1 and MG2 as driving force sources, and outputs the output of the engine E to the first motor / generator MG1 side, wheels W and a second motor / motor. It is configured as a so-called two-motor split type hybrid drive device provided with a planetary gear device PG for power distribution that is distributed to the generator MG2 side. In other words, the vehicle drive device 20 has, as a mechanical configuration, an input shaft I connected to the engine E, a first motor / generator MG1, a second motor / generator MG2, and a planetary gear device for power distribution. PG, a counter gear mechanism C, and a differential device D that distributes driving force to a plurality of wheels W are provided. Here, the planetary gear device PG distributes the output (driving force) of the engine E to the first motor / generator MG1 and the counter drive gear O. The counter drive gear O is connected to the wheels W via the counter gear mechanism C and the differential device D. The second motor / generator MG2 is connected to the counter gear mechanism C, and is connected to the counter drive gear O and the differential device D via the counter gear mechanism C.

  Here, the first motor / generator MG1 generates electric power mainly by the driving force of the engine E transmitted through the planetary gear unit PG, charges the battery B, or drives the second motor / generator MG2. It functions as a generator that supplies the power. However, the first motor / generator MG1 may function as a motor that outputs a driving force by power running when the vehicle travels at a high speed or when the engine E starts. On the other hand, the second motor / generator MG2 mainly functions as a motor that assists the driving force for driving the vehicle. However, when the vehicle decelerates, the second motor / generator MG2 functions as a generator, and may function as a generator that regenerates the inertial force of the vehicle as electric energy. In the present embodiment, the first motor / generator MG1 and the second motor / generator MG2 are AC motors.

  In the vehicle drive device 20, the MG1 inverter I1 for driving and controlling the first motor / generator MG1 is electrically connected to the stator coil of the first motor / generator MG1. Further, an MG2 inverter I2 for driving and controlling the second motor / generator MG2 is electrically connected to the stator coil of the second motor / generator MG2. MG1 inverter I1 and MG2 inverter I2 are electrically connected to each other and electrically connected to battery B. The MG1 inverter I1 and the MG2 inverter I2 control the current value supplied to each of the first motor / generator MG1 and the second motor / generator MG2, the frequency and phase of the AC waveform, and the like. As a result, the MG1 inverter I1 and the MG2 inverter I2 drive-control the first motor / generator MG1 and the second motor / generator MG2 so that the output torque and the rotational speed necessary for traveling of the vehicle are obtained. Although not shown, the vehicle drive device 20 includes a number of detection means such as sensors for detecting the state of each part. The states detected by such detection means include, for example, the rotational speeds of the first motor / generator MG1 and the second motor / generator MG2, the temperatures of the MG1 inverter I1 and the MG2 inverter I2, and the MG1 inverter I1 and the MG2 inverter I2. The supplied voltage, the rotational speed of each rotary element of the drive system, the vehicle speed, the travel distance, and the like are included. Information representing the state of the vehicle drive device 20 thus detected is acquired by the control unit 10 as detection information, as shown in FIG.

2. Overview of Failure Data Recording Device Next, an overview of the overall configuration of the failure data recording device 1 will be described. As shown in FIG. 1, the defect data recording apparatus 1 has a control unit 10 that executes various arithmetic processes as described later as a central configuration, and stores a work memory 26 and tables 31 to 33 described later. A table storage unit 30 and a defect recording unit 40 provided with recording areas 61 and 62 for defect data 60 are provided.

  The control unit 10 controls the vehicle drive device 20 and also controls the operation of the defect data recording device 1. In the present embodiment, the control unit 10 functions as the defect data recording apparatus 1 as a function unit, that is, a defect recording processing unit 11, an operation history recording processing unit 12, an initial state determination unit 13, an attention attribute specifying unit 14, and a recording. A condition update unit 15 is provided. The control unit 10 includes one or more arithmetic processing devices and a recording medium such as a ROM in which software (programs) and data for operating the arithmetic processing devices are stored. The functional units 11 to 15 of the control unit 10 are configured by hardware and / or software for performing various processes on input data using the arithmetic processing unit as a core member. The control unit 10 is connected to a work memory 26 in which data used for arithmetic processing by the arithmetic processing device is temporarily stored. Further, the control unit 10 is connected to a table storage unit 30 and a defect recording unit 40 so that information can be transmitted and received. Here, the work memory is configured by a volatile memory such as DRAM (Dynamic RAM) or SRAM (Static RAM). On the other hand, the table storage unit 30 and the defect recording unit 40 are configured by a nonvolatile memory such as an EEPROM (Electrically Erasable Programmable ROM).

  In addition, as described above, the control unit 10 transmits and receives control signals to and from the vehicle drive device 20, and receives the detection information from the vehicle drive device 20. It is connected. Furthermore, the control unit 10 is also connected to the main switch 25 of the vehicle drive device 20, and is configured to detect whether the main switch 25 is on or off. Here, the main switch 25 is a switch for turning on or off the main power supply of the vehicle drive device 20. That is, when the main switch 25 is turned on, the vehicle drive device 20 is connected to a power source and becomes operable, and when the main switch 25 is turned off, the power source is cut off and completely stopped.

  In the work memory 26, in addition to a processing area in which data used for arithmetic processing by the arithmetic processing unit constituting the control unit 10 is temporarily stored, data recorded as fault data 60 when a fault occurs Is provided as a buffer area that constitutes a buffer 27 in which is temporarily stored. As the buffer 27, for example, a ring buffer is used. The buffer 27 relates to recording items defined in a defect recording condition 70 described later among various variable data representing the state of the vehicle driving device 20 that changes with the operation of the vehicle driving device 20. A certain amount of data is stored. At this time, the data sampled at the sampling interval defined in the defect recording condition 70 is stored in the buffer 27 for each recording item for a time longer than the sampling time defined in the defect recording condition 70. The data stored in the buffer 27 is repeatedly overwritten in order from the start address to the end address, and is sequentially updated to new data. As a result, in the buffer 27, current and previous (past) data more than a predetermined sampling time are sequentially stored for various variables that change as the vehicle drive device 20 is operated.

3. Table Storage Unit Next, the configuration of the table storage unit 30 of the defect data recording apparatus 1 will be described. In the present embodiment, as shown in FIG. 1, the table storage unit 30 stores a defect item table 31, an operation state item table 32, and a recording condition table 33. FIG. 3 is a diagram illustrating a specific example of the defect item table 31. FIG. 4 is a diagram illustrating a specific example of the operation state item table 32. FIG. 5 is a diagram showing a specific example of the recording condition table 33. Although not shown, the table storage unit 30 stores a table of diagnostic codes (diagnostic codes) for diagnosis of the vehicle drive device 20 in addition to the tables 31 to 33.

  As shown in FIG. 3, the failure item table 31 is a table that defines a plurality of “failure items” for failures that may occur in the vehicle drive device 20. In the present embodiment, the defect item table 31 includes “defect number” that is an item number of each defect item, “priority order” of each defect item, and “defect attribute” related to each defect item. It is prescribed. In other words, the defect item table 31 defines a defect attribute associated with each of a plurality of defect items and a priority order for each of the plurality of defect items. Here, the defect item is an item that is determined as a defect based on a predetermined condition regarding the state of each part of the vehicle drive device 20. In the example shown in the figure, for example, “MG1 inverter overheating”, “MG2 overspeed”, “planetary gear mechanism lock”, etc. are defined as failure items. In the defect item table 31, a plurality (100 in the illustrated example) of such defect items are listed and defined. For each defect item, a condition for determining a defect is separately defined.

  The priority order corresponds to the importance level of the defect related to each defect item, and the higher the priority order (the smaller the priority number), the higher the importance level of the defect item. The priority order of each defect item is used when the attention attribute specifying unit 14 to be described later specifies the attention attribute for determining the defect recording condition. The defect attribute is an attribute to which a defect related to each defect item belongs. In the present embodiment, the defect attribute is defined corresponding to each part of the vehicle drive device 20. In other words, the defect attribute is defined as an attribute divided for each part of the vehicle drive device 20 such as “inverter”, “rotary electric machine”, “gear mechanism”, and the like. In other words, the defect item table 31 defines the part of the vehicle drive device 20 to which each defect item relates as a defect attribute of the defect item. For example, since the trouble item “MG1 inverter overheating” is a trouble related to the MG1 inverter I1, the trouble attribute is defined as “inverter”.

  As shown in FIG. 4, the operation state item table 32 is a table that defines a plurality of “operation state items” that define a predetermined attention value for the operation state of the vehicle drive device 20. In the present embodiment, the operation state item table 32 includes a “threshold value” defined for each operation state item, a “priority” of each operation state item, and a “priority” related to each operation state item. "Defect attribute" is specified. That is, the operation state item table 32 includes threshold values defined for each of the plurality of operation state items, defect attributes associated with each of the plurality of operation state items, and priority for each of the plurality of operation state items. Ranking is defined. Here, the attention value defined as the operation state item is a characteristic value regarding the operation state of the vehicle drive device 20, and is, for example, a maximum value or a minimum value until now, or a slight value for various operation states. The number of occurrences of abnormalities is included. In the illustrated example, for example, “MG1 maximum rotation speed”, “MG1 inverter maximum temperature”, and the like are defined as operation state items. In the operation state item table 32, a plurality of such operation state items are listed and defined.

  The threshold value defined for each operation state item is a value used when the attention attribute specifying unit 14 described later specifies the attention attribute for determining the defect recording condition. As this threshold value, for example, the operation state of the vehicle drive device 20 related to each operation state item is a value that defines a state in which there is a possibility that a malfunction occurs. Therefore, this threshold value includes information indicating in which direction the threshold value is exceeded, which may cause a problem, and information of an inequality sign in the illustrated example. The priority corresponds to the importance of the attention value defined as each operation state item, and the higher the priority (the smaller the priority number), the higher the importance of the operation state item. . The priority of each operation state item is used when the attention attribute specifying unit 14 described later specifies the attention attribute for determining the defect recording condition. The defect attribute is an attribute to which the attention value of the operation state related to each operation state item belongs. As described above, in the present embodiment, the defect attribute is defined corresponding to each part of the vehicle drive device 20. That is, in the operation state item table 32, the part of the vehicle drive device 20 to which each operation state item relates is defined as a defect attribute of the operation state item. For example, since the operation state item “MG1 maximum rotation speed” is a noticed value for the operation state of the first motor / generator MG1, the failure attribute is defined as “rotating electric machine”.

  As shown in FIG. 5, the recording condition table 33 is a table in which a plurality of recording conditions corresponding to a plurality of defect attributes are stored. As described above, the defect attribute is defined corresponding to each part of the vehicle drive device 20. Accordingly, the recording condition table 33 stores a plurality of recording conditions corresponding to each part of the vehicle drive device 20 such as “inverter”, “rotating electric machine”, “gear mechanism”, and the like. In the illustrated example, “recording trigger”, “recording item”, and “sampling interval” are defined as recording conditions. The recording condition update unit 15 to be described later selects a recording condition corresponding to the attention attribute specified by the attention attribute specifying unit 14 from a plurality of recording conditions stored in the recording condition table 33, and a defect recording processing unit 11 is set as a defect recording condition 70 used by the computer 11. The set defect recording condition 70 is recorded in the defect recording unit 40.

  The recording trigger as a recording condition is a trigger condition that serves as a trigger when recording the defect data 60 by the defect recording processing unit 11 described later. In the present embodiment, the recording trigger is composed of one or more defect items selected from a plurality of defect items defined in the defect item table 31. That is, as shown in the figure, the recording condition table 33 defines a defect number that is the item number of the defect item defined in the defect item table 31 as a recording trigger for each recording condition. Therefore, the defect recording processing unit 11 to be described later executes recording of the defect data 60 when a defect item related to the defect number defined in the recording trigger occurs. Specifically, when the recording condition corresponding to the defect attribute “inverter” is set as the defect recording condition, a defect item with the defect number “5, 12, 21,. At that time, the defect recording processing unit 11 records the defect data 60.

  The recording item as the recording condition is an item that the defect recording processing unit 11 records as the defect data 60 when a recording trigger occurs. Here, the record item is defined as an item of data to be recorded as the defect data 60 from various variable data representing the state of the vehicle drive device 20 that changes in accordance with the operation of the vehicle drive device 20. It is a thing. Here, the recording condition table 33 defines a plurality of recording items for each recording condition. Specifically, as shown in the figure, for example, “MG1 inverter temperature”, “MG2 inverter temperature”, “battery voltage”, and the like are defined as recording items of recording conditions corresponding to the defect attribute “inverter”.

  The sampling interval as the recording condition is an interval for sampling data to be recorded as the defect data 60. In the present embodiment, the recording condition table 33 defines a sampling interval for each recording condition. Specifically, as illustrated, for example, “t1” is defined as the sampling interval of the recording condition corresponding to the defect attribute “inverter”, and “t2” is defined as the sampling interval of the recording condition corresponding to the defect attribute “rotating electric machine”. Is defined. Here, what is recorded as the defect data 60 is data of a plurality of recording items included in the recording condition set as the defect recording condition 70. The data of these record items is sampled at the sampling interval set as the defect recording condition 70 and stored in the buffer 27 while the vehicle drive device 20 is operating. As described above, the data of each recording item stored in the buffer 27 is repeatedly overwritten and sequentially updated to new data. When the recording trigger set as the defect recording condition 70 is generated, the defect recording processing unit 11 stores the data of each recording item stored in the buffer 27 as the defect data 60 as the defect recording unit. 40 in the first defect data recording area 61 or the second defect data recording area 62. At this time, as will be described later, the failure data 60 includes instantaneous data 63 representing the state of the vehicle drive device 20 at the moment when the failure occurs, and one or both of the vehicle drive devices immediately before and immediately after the occurrence of the failure. And time data 64 representing changes over time in 20 states. The sampling interval as the recording condition defines the interval at which the temporal data 64 is sampled.

4). Defect Recording Unit Next, the configuration of the defect recording unit 40 of the defect data recording apparatus 1 will be described. In the present embodiment, as shown in FIG. 1, the operation history data 50 and the failure recording condition 70 are recorded in the failure recording unit 40, and the first failure data recording area 61 and the second failure data recording area 62 are recorded. And defect data 60 is recorded in these recording areas 61 and 62. FIG. 6 is a diagram showing the details recorded in the defect recording unit 40 in more detail.

  The operation history data 50 is data representing an operation history of the vehicle drive device 20. In the present embodiment, as shown in FIG. 6, the operation history data 50 includes operation history data 51, failure occurrence history data 52, and operation state history data 53. FIG. 7 is a diagram illustrating a specific example of data recorded as the operation history data 51. FIG. 8 is a diagram illustrating a specific example of data recorded as the defect occurrence history data 52. FIG. 9 is a diagram illustrating a specific example of data recorded as the operation state history data 53.

  The driving history data 51 is data relating to the driving history of the vehicle drive device 20. In the present embodiment, as shown in FIG. 7, “data” representing specific contents is recorded in association with each “item” of the operation history data 51. In the illustrated example, for example, “main switch ON / OFF count”, “driving distance”, “driving time”, and the like are set as items of the driving history data 51, and data associated with each item is recorded. ing. These data are all data from the time of shipment of the vehicle drive device 20 or from the time when the failure data recording device 1 is reset to the initial state. Here, the number of main switch on / off times is the number of times counted as one cycle after the main switch 25 is turned on until it is turned off. The driving distance is a driving distance of the vehicle drive device 20, more specifically, a travel distance of the vehicle by the wheels W driven by the vehicle drive device 20. The driving time is the driving time of the vehicle drive device 20, that is, the time when the vehicle drive device 20 is operated while the main switch 25 is in the ON state.

  The failure occurrence history data 52 is data of the number of occurrences for each of a plurality of failure items that define the failures that may occur in the vehicle drive device 20. In the present embodiment, as shown in FIG. 8, the defect occurrence history data 52 is recorded with “occurrence number” data in association with “defect item” and “defect number” defined in the defect item table 31. ing. Here, as the defect occurrence history data 52, data on the number of occurrences for each of all the defect items defined in the defect item table 31 is recorded. In the illustrated example, for example, the number of occurrences of the failure item “MG1 inverter overheating” of the failure number “1” is “4”, and the number of occurrences of the failure item “MG1 inverter voltage detection circuit abnormality” of the failure number “3” is “ Data such as “1” times are recorded. Although not shown, the data indicating the number of times of occurrence of each defect item is associated with data indicating the time when each defect related to the defect item occurs (failure occurrence time). In the present embodiment, the data of the occurrence timing of the malfunction is data on the number of times the main switch is turned on and off when the malfunction occurs. In other words, the data on the occurrence time of the failure is data indicating the number of on / off cycles of the main switch in which each failure related to the failure item occurs. Specifically, for example, in the data of the number of occurrences of the failure item “MG1 inverter overheat”, the first occurrence time is the main switch on / off number “22” and the second occurrence time is the main switch on / off. Data such as the number of times “35” is recorded in association with each other. In addition to this, as the data of such trouble occurrence time, for example, it is also suitable as data indicating the occurrence time of the trouble item in terms of the driving time or driving distance of the vehicle drive device 20.

  The operation state history data 53 is data of a plurality of operation state items that define a predetermined attention value for the operation state of the vehicle drive device 20. In the present embodiment, as shown in FIG. 9, the operation state history data 53 is associated with “operation state items” defined in the operation state item table 32 and represents the specific contents of each operation state item. Data "is recorded. Here, as the operation state history data 53, data of all operation state items defined in the operation state item table 32 is recorded. In the illustrated example, for example, “MG1 maximum rotation speed” is “R3 [rpm]”, “MG2 maximum rotation speed” is “R4 [rpm]”, “MG1 inverter maximum temperature” is “T2 [° C.]”, etc. Data is recorded. These data are the maximum value (maximum value) and minimum value (minimum value) over the entire period from the time of shipment of the vehicle drive device 20 or when the failure data recording device 1 is reset to the initial state. It is data. Although not shown, the operation state history data 53 includes data on the number of occurrences of minor abnormalities in the operation state of the vehicle drive device 20.

  In the defect recording unit 40, a recording condition for the attention attribute specified by the attention attribute specifying unit 14 described later is selected from a plurality of recording conditions stored in the recording condition table 33, and is recorded as a defect recording condition 70. Is done. The defect recording processing unit 11 to be described later records the defect data 60 according to the defect recording condition 70 recorded in the defect recording unit 40. In the present embodiment, the defect recording condition 70 includes four conditions: a recording trigger, a recording item, a sampling interval, and a sampling time. Here, the recording trigger, the recording item, and the sampling interval are the same as the recording trigger, the recording item, and the sampling interval for each recording condition stored in the recording condition table 33 described above. On the other hand, the sampling time is not included in the recording conditions stored in the recording condition table 33. Therefore, the sampling time derived by the recording condition update unit 15 described later is incorporated into the defect recording condition 70 and recorded in the defect recording unit 40.

  The first defect data recording area 61 and the second defect data recording area 62 are recording areas in which defect data 60 acquired when a problem occurs in the vehicle drive device 20 is recorded. Here, the two recording areas for recording the defect data 60 are provided in order to record and store the two defect data 60 acquired at different times in the defect recording unit 40. That is, the defect data 60 when the defect recording condition 70 is first established is recorded in the first defect data recording area 61 and overwriting is prohibited. In the second defect data recording area 62, the defect data 60 when the defect recording condition 70 is satisfied for the second and subsequent times is overwritten and recorded on the previously recorded defect data 60. That is, in the first defect data recording area 61, the defect data 60 acquired when the recording trigger of the defect recording condition 70 is first generated is recorded, and in the second defect data recording area 62, the defect recording is finally performed. The latest defect data 60 acquired when the recording trigger of the condition 70 occurs is recorded.

  As described above, the defect data 60 is composed of data of a plurality of recording items defined in the defect recording condition 70. The data of each recording item is data of various variables representing the state of the vehicle drive device 20 that changes with the operation of the vehicle drive device 20. Further, as shown in FIG. 6, the defect data 60 recorded in each defect data recording area 61, 62 is composed of instantaneous data 63 and time-lapse data 64. Here, the instantaneous data 63 is data representing the state of the vehicle drive device 20 at the moment when the malfunction occurs. That is, the instantaneous data 63 is instantaneous data of each recording item stored in the buffer 27 at the moment when the recording trigger of the defective recording condition 70 occurs. On the other hand, the temporal data 64 is data representing a temporal change in the state of one or both of the vehicle drive devices 20 immediately before and after the occurrence of the malfunction. That is, the time-dependent data 64 is time-sequential data that is stored in the buffer 27 before and after the moment when the recording trigger of the failure recording condition 70 is generated and continues for a predetermined time. Here, the time-lapse data 64 is sampled at the sampling interval defined in the defect recording condition 70 and is recorded in the sampling time defined in the defect recording condition 70 from the data of each recording item continuously stored in the buffer 27. Minute data is extracted and recorded. Here, the ratio of the sampling time before the moment when the recording trigger occurs is the same as the ratio of the subsequent sampling time for the data of all the recording items constituting the time-lapse data 64. That is, for example, when the sampling time is 1000 [ms], the data of each recording item 500 [ms] immediately before the moment when the recording trigger occurs and 500 [ms] immediately after is recorded as the time-dependent data 64.

5. Next, the configuration of each functional unit of the control unit 10 of the defect data recording apparatus 1 will be described. In the present embodiment, as shown in FIG. 1, the control unit 10 includes a defect recording processing unit 11, an operation history recording processing unit 12, an initial state determination unit 13, and an attention as functional units constituting the defect data recording apparatus 1. An attribute specifying unit 14 and a recording condition updating unit 15 are provided. Hereinafter, functions of these functional units will be described.

  The defect recording processing unit 11 performs processing for recording the defect data 60 according to the defect recording condition 70 recorded and set in the defect recording unit 40. Therefore, the defect recording processing unit 11 first sets the storage item of the buffer 27 so that the data related to the recording item defined in the defect recording condition 70 is stored in the buffer 27. At this time, the defect recording processing unit 11 sets the storage condition of the buffer 27 so as to sample the data of each recording item at the sampling interval defined in the defect recording condition 70, and is defined in the defect recording condition 70. The storage capacity of the buffer 27 for each recording item is set so as to store for a time longer than the sampling time. The defect recording processing unit 11 records the defect data 60 when a defect related to the defect item defined as the recording trigger of the defect recording condition 70 occurs. At this time, the defect recording processing unit 11 reads the data of each recording item defined in the defect recording condition 70 from the buffer 27 and sets it as the defect data 60.

  Here, since the defect data 60 is composed of the instantaneous data 63 and the time-lapse data 64, the defect recording processing unit 11 reads the instantaneous data 63 and the time-lapse data 64 for each recording item from the buffer 27, thereby causing the defect. The data 60 is recorded in the defect recording unit 40. The defect recording unit 40 is provided with a first defect data recording area 61 and a second defect data recording area 62. As described above, overwriting is prohibited in the first defect data recording area 61, and overwriting is allowed in the second defect data recording area 62. Therefore, the defect recording processing unit 11 determines whether or not the defect data 60 has already been recorded in the first defect data recording area 61 when the defect data 60 is acquired. If it is recorded in the defect data recording area 61, the acquired defect data 60 is recorded in the second defect data recording area 62. As described above, in the present embodiment, the defect recording processing unit 11 and the defect recording unit 40 in which the defect data 60 and the defect recording condition 70 are recorded constitute the defect data recording means in the present invention.

  The operation history recording processing unit 12 performs a process of recording operation history data 50 representing an operation history of the vehicle drive device 20 as the target device. At this time, the operation history record processing unit 12 reads the operation history data 50 recorded in the defect recording unit 40 to the work memory 26 when the main switch 25 is turned on, and the operation state of the vehicle drive device 20 The operation history data 50 in the work memory 26 is appropriately updated in accordance with the change in data, and the updated latest operation history data 50 is recorded in the defect recording unit 40. Thereby, the operation history data 50 recorded in the defect recording unit 40 is updated. In the present embodiment, the operation history recording processing unit 12 and the defect recording unit 40 in which the operation history data 50 is recorded constitute the history data recording means in the present invention.

  As described above, the operation history data 50 includes the operation history data 51, the failure occurrence history data 52, and the operation state history data 53 (see FIG. 6). Therefore, the operation history record processing unit 12 reads the operation history data 51 recorded in the defect recording unit 40 to the work memory 26 and acquires data for each item of the operation history data 51. In the present embodiment, the operation history record processing unit 12 acquires the data of each item of the operation history data 51 and updates the operation history data 51 in the work memory 26 when the main switch 25 is turned off. To do. Here, as shown in FIG. 7, each item of the driving history data 51 includes, for example, the number of main switch on / off times, the driving distance, the driving time, and the like. These data are acquired from the vehicle drive device 20 and the main switch 25 connected to the vehicle 10. Then, the operation history record processing unit 12 overwrites and updates the operation history data 51 recorded in the defect recording unit 40 with the updated operation history data 51 in the work memory 26.

  Further, the operation history recording processing unit 12 reads out the failure occurrence history data 52 recorded in the failure recording unit 40 to the work memory 26, and stores data on the number of occurrences of failures related to each failure item constituting the failure occurrence history data 52. get. In the present embodiment, the operation history recording processing unit 12 monitors the occurrence of defects related to all the defect items defined in the defect item table 31 while the main switch 25 is in an on state, and a defect occurs. In this case, “1” is added to the number of occurrences of each defect item constituting the defect occurrence history data 52. For example, when the failure occurrence history data 52 as shown in FIG. 8 is stored in the work memory 26, the operation history record processing unit 12 performs the MG1 inverter of the vehicle drive device 20 for the failure item “MG1 inverter overheating”. The temperature is monitored based on detection information of a temperature sensor provided in I1. Then, when the temperature of the MG1 inverter I1 exceeds a temperature threshold set in advance to determine that the MG1 inverter is overheated, it is determined that the “MG1 inverter overheating” has occurred. In that case, the operation history record processing unit 12 adds “1” to the number of occurrences of “MG1 inverter overheating” included in the failure occurrence history data 52 recorded in the failure recording unit 40, and sets the occurrence number to “5”. Update. Similarly, the operation history record processing unit 12 monitors the occurrence of defects related to all the defect items defined in the defect item table 31, and updates the number of occurrences when a defect occurs. Then, the operation history record processing unit 12 records the defect occurrence history recorded in the defect recording unit 40 based on the updated defect occurrence history data 52 in the work memory 26 when the occurrence number is updated. The data 52 is overwritten and updated.

  In addition, the operation history record processing unit 12 reads the operation state history data 53 recorded in the defect recording unit 40 to the work memory 26 and acquires data about each operation state item constituting the operation state history data 53. In the present embodiment, the operation history recording processing unit 12 monitors the data of all the operation state items defined in the operation state item table 32 while the main switch 25 is in the ON state, and When the data needs to be updated, the data of each operation state item constituting the operation state history data 53 is updated. Here, as a case where the update of the data of the operation state item is necessary, for example, if the operation state item defines the maximum value or the minimum value so far, the maximum value recorded in the operation state history data 53 Alternatively, a value exceeding the minimum value is obtained, and if the operation state item defines the number of occurrences of a minor abnormality, the abnormality occurs. Specifically, when the operation state history data 53 as shown in FIG. 9 is stored in the work memory 26, the operation history record processing unit 12 performs the vehicle drive for the operation state item “MG1 maximum rotation speed”. The number of rotations is monitored based on detection information of a rotation sensor provided in the first motor / generator MG1 of the apparatus 20. When the rotation speed of the first motor / generator MG1 exceeds the maximum rotation speed “R3 [rpm]” recorded as the operation state history data 53, the operation history recording processing unit 12 The data of the maximum rotation speed at that time is acquired, and the data of the operation state item “MG1 maximum rotation speed” is updated. Similarly, the operation history record processing unit 12 monitors the data of all the operation state items defined in the operation state item table 32, and updates the data when the data needs to be updated. Then, the operation history record processing unit 12 uses the updated operation state history data 53 in the work memory 26 to record the operation state history data recorded in the defect recording unit 40 when such data is updated. 53 is overwritten and updated.

  The initial state determination unit 13 performs a process of determining whether or not the driving history of the vehicle drive device 20 satisfies a predetermined attention attribute specifying condition based on the driving history data 51 included in the operation history data 50. Here, the attention attribute specifying condition is a condition for determining that sufficient operation history data 50 has been acquired for specifying the attention attribute by the attention attribute specifying unit 14 described later. When the initial state determination unit 13 determines that the attention attribute specifying condition is not satisfied, the operation history data 50 sufficient for specifying the attention attribute by the attention attribute specifying unit 14 is determined for the vehicle drive device 20. It determines with it being in the initial state which is not acquired, and does not specify an attention attribute. In the present embodiment, the initial state determination unit 13 determines whether the number of main switch on / off included in the driving history data 51 (see FIG. 7) is a predetermined number (for example, 30 times) or more as the attention attribute specifying condition. Determine whether or not. When the initial state determination unit 13 determines that the attention attribute specifying condition is not satisfied, the attention attribute is not specified by the attention attribute specifying unit 14, and accordingly, the recording condition corresponding to the attention attribute is set as the defect recording condition 70. No updates are made. In this case, the default recording condition is set as the defect recording condition 70, and the defect recording processing unit 11 records the defect data 60 in accordance with the defect recording condition 70. Here, the default recording conditions are, for example, the recording conditions in which the main defect items for the entire vehicle drive device 20 are recorded items and the data is recorded widely and shallowly as in the conventional case.

  The attention attribute specifying unit 14 performs processing for specifying, as the attention attribute, a defect attribute related to a defect that is most likely to occur next based on the operation history data 50. In the present embodiment, the attention attribute specifying unit 14 has a defect related to a defect that is most likely to occur next based on at least one of the defect occurrence history data 52 and the operation state history data 53 included in the operation history data 50. The attribute is inferred and the defect attribute is specified as the attention attribute. Here, the process of identifying the attention attribute based on the defect occurrence history data 52 is referred to as a first identification process, and the process of identifying the attention attribute based on the operation state history data 53 is referred to as a second identification process. As will be described later with reference to the flowcharts shown in FIGS. 12 to 14, the attention attribute specifying unit 14 performs the first specifying process when a predetermined first specifying process selection condition regarding the defect occurrence history data 52 is satisfied, and operates. When the predetermined second specific process selection condition regarding the state history data 53 is satisfied, the second specific process is performed, and when neither condition is satisfied, the target attribute specifying process is not performed.

  Here, the first specifying process selection condition is a condition for determining whether or not sufficient defect occurrence history data 52 for specifying the attention attribute by the attention attribute specifying unit 14 is acquired. In the present embodiment, the first specific process selection condition is that the number of occurrences of data having the highest number of occurrences among all occurrences of failure items included in the failure occurrence history data 52 (see FIG. 8) is predetermined. The condition is that the number of times is equal to or greater than the number of times (for example, three times or more). Further, in the present embodiment, in order to avoid considering the old past failure occurrence history data 52 in the first specifying process, the main switch on / off count is within a predetermined number (for example, the latest 30) Only the failure occurrence history data 52 acquired within a maximum number of times) is used. Therefore, when determining the first specific process selection condition, the main switch on / off count is determined using only the failure occurrence history data 52 acquired within the predetermined count from the present to the past. On the other hand, the second specifying process selection condition is a condition for determining whether or not sufficient operation state history data 53 for specifying the attention attribute by the attention attribute specifying unit 14 is acquired. In the present embodiment, the second specific process selection condition is a threshold defined in the operation state item table 32 among the data of all operation state items included in the operation state history data 53 (see FIG. 9). The condition is that there is an operation state item exceeding the value (see FIG. 4). That is, if there is at least one operation state item in the operation state history data 53 that exceeds the threshold value (see FIG. 4) defined in the operation state item table 32, the second specific process selection condition is satisfied.

  When performing the first specifying process, the attention attribute specifying unit 14 specifies, as the attention attribute, the defect attribute related to the defect item having the highest occurrence frequency based on the defect occurrence history data 52. At this time, the attention attribute specifying unit 14 determines a defect attribute related to each defect item based on the defect item table 31. For example, based on the failure occurrence history data 52 as shown in FIG. 8, the failure item “MG1 inverter overheat” with the failure number “1” is the failure item with the highest number of occurrences. Based on the table 31, the failure attribute “inverter” related to the failure item “MG1 inverter overheating” is identified as the attribute of interest. By the way, there may be a plurality of failure items having the highest occurrence frequency among the plurality of failure items recorded in the failure occurrence history data 52. In this case, the attention attribute specifying unit 14 specifies, as the attention attribute, a defect attribute related to the defect item having a higher priority based on the priority order defined in the defect item table 31 for each defect item. In the present embodiment, in such a first specifying process, the attention attribute specifying unit 14 does not consider the old past trouble occurrence history data 52 so that the number of main switch on / off times from the present to the past The attention attribute is specified using only the defect occurrence history data 52 acquired within a predetermined number of times (for example, within the last 30 times).

  In addition, when performing the second specifying process, the attention attribute specifying unit 14 sets the attention value related to the operation state item based on the operation state history data 53 to the threshold value defined in the operation state item table 32 ( The defect attribute related to the operation state item exceeding (see FIG. 4) is specified as the attention attribute. At this time, the attention attribute specifying unit 14 determines a defect attribute related to each operation state item based on the operation state item table 32. For example, based on the operation state history data 53 as shown in FIG. 9, the data “R3 [rpm]” of the operation state item “MG1 maximum rotation speed” is defined in the operation state item table 32 shown in FIG. When the threshold value “≧ R1” of the “MG1 maximum rotation speed” is satisfied, the attention attribute specifying unit 14 based on the operation state item table 32, the defect attribute related to the operation state item “MG1 maximum rotation speed”. “Rotating electric machine” is specified as the attribute of interest. By the way, among the plurality of operation state items recorded in the operation state history data 53, there may be a plurality of operation state items that exceed the threshold values defined in the operation state item table 32 for each operation state item. . In this case, the attention attribute specifying unit 14 uses, as the attention attribute, the defect attribute related to the operation state item having a higher priority based on the priority order specified in the operation state item table 32 for each operation state item. Identify.

  The recording condition update unit 15 performs a process of updating the recording condition according to the attention attribute specified by the attention attribute specifying unit 14 based on the operation history data 50 as a new defect recording condition 70. That is, when the attention attribute is specified by the attention attribute specifying unit 14, the recording condition update unit 15 identifies the defect attribute specified as the attention attribute from the plurality of recording conditions stored in the recording condition table 33. The recording condition corresponding to the above is selected, and the defect recording condition 70 recorded in the defect recording unit 40 is overwritten and updated. For example, when the defect attribute “rotary electric machine” is specified as the attribute of interest, the recording condition update unit 15 sets the recording condition specified for the defect attribute “rotating electric machine” from the recording condition table 33 shown in FIG. Read and set as a new defect recording condition 70. At this time, the recording condition update unit 15 also performs processing for deriving the sampling time constituting the defect recording condition 70 based on the sampling interval of the recording condition corresponding to the attribute of interest stored in the recording condition table 33. Here, the sampling time is obtained by effectively using the recording capacity of the first defect data recording area 61 or the second defect data recording area 62, and various variable data representing the state of the vehicle drive device 20 related to each recording item. It is preferable to set so as to record for the longest time. Therefore, the recording condition update unit 15 sets the sampling time as the defect recording condition 70, the sampling interval, the amount of data acquired by one sampling, the first defect data recording area 61 or the second defect data recording area 62. Is calculated based on the recordable data capacity for each recording item secured. Note that the sampling time may be a predetermined fixed value. The recording condition updating unit 15 generates the defect recording condition 70 by incorporating the sampling time derived as described above.

  As described above, in the present embodiment, the initial condition determining unit 13, the attention attribute specifying unit 14, and the recording condition updating unit 15 constitute a recording condition setting unit in the present invention.

6). Processes Executed by Fault Data Recording Device Next, procedures of various processes executed by the fault data recording device 1 according to the present embodiment will be described using the flowcharts shown in FIGS. FIG. 10 is a flowchart showing the procedure of the operation history data recording process for recording the operation history data 51 and the operation state history data 53 as the operation history data 50. FIG. 11 is a flowchart showing a procedure of defect data recording processing for recording the defect occurrence history data 52 and the defect data 60 as the operation history data 50. FIG. 12 is a flowchart showing a procedure of defect recording condition update processing for updating the defect recording condition 70 based on the operation history data 50. FIG. 13 is a flowchart showing the procedure of the first specifying process in step # 55 of FIG. FIG. 14 is a flowchart showing the procedure of the second specifying process in step # 57 of FIG. Each processing procedure described below is executed by hardware, software (program), or both of the above-described functional units. When each functional unit is configured by a program, the arithmetic processing unit included in the control unit 10 of the malfunction data recording apparatus 1 operates as a computer that executes the malfunction data recording program that configures each functional unit. . Hereinafter, it demonstrates according to a flowchart.

  First, the procedure of the operation history data recording process will be described. As shown in FIG. 10, this process is started when the main switch 25 is turned on (step # 11: Yes), and the operation history recording processing unit 12 is the operation recorded in the defect recording unit 40. The operation history data 51 and the operation state history data 53 as the history data 50 are read out to the work memory 26 (step # 12). In addition, when the main switch 25 is turned on as shown in FIG. 11, in addition to these, as described later, defect occurrence history data 52 and defect recording conditions recorded in the defect recording unit 40 70 is read into the work memory 26. Next, the operation history record processing unit 12 acquires data of all the operation state items defined in the operation state item table 32 from each unit of the vehicle drive device 20 at predetermined time intervals (step # 13). . Then, the acquired data of each operation state item is compared with the data of the operation state item included in the operation state history data 53 read to the work memory 26 (step # 14). In this way, the operation history record processing unit 12 monitors the data of all the operation state items defined in the operation state item table 32.

  Then, the operation history record processing unit 12 determines whether or not the operation state history data 53 needs to be updated based on the comparison result of Step # 14 (Step # 15). That is, the operation history record processing unit 12 operates based on the data of the operation state item acquired in step # 13, for example, if the operation state item defines the maximum value or the minimum value so far, When data having a value exceeding the maximum value or the minimum value of the data 53 is obtained, it is determined that updating is necessary. Further, for example, if the operation state item defines the number of occurrences of minor abnormality, it is determined that updating is necessary when data indicating that the abnormality has occurred is obtained. When it is determined that the operation state history data 53 needs to be updated (step # 15: Yes), the operation history record processing unit 12 updates the operation state history data 53 (step # 16). That is, the operation history record processing unit 12 updates the data of the operation state item in the operation state history data 53 in the work memory 26 based on the data of the operation state item newly obtained in step # 13. Then, the updated operation state history data 53 in the work memory 26 is recorded in the defect recording unit 40 (step # 17). When it is determined that it is not necessary to update the operation state history data 53 (step # 15: No), the operation history record processing unit 12 does not perform the processes of steps # 16 and # 17. The processes from step # 13 to step # 17 are repeatedly executed unless the main switch 25 is turned off (step # 18: No).

  When the main switch 25 is turned off (step # 18: Yes), the operation history record processing unit 12 updates the operation history data 51 (step # 19). Specifically, the operation history record processing unit 12 adds “1” to the data of the number of times of main switch on / off constituting the operation history data 51 in the work memory 26. In addition, data on the driving distance and driving time of the vehicle drive device 20 after the main switch 25 is turned on in step # 11 is acquired from the vehicle driving device 20, and the driving distance and driving time are obtained from the work memory 26. Is added to the driving distance and driving time data constituting the driving history data 51 in FIG. Thereafter, the operation history record processing unit 12 records the updated operation history data 51 in the work memory 26 in the defect recording unit 40 (step # 20). As described above, the operation history data 51 and the operation state history data 53 recorded in the defect recording unit 40 are updated. This ends the operation history data recording process.

  Next, the procedure of defect data recording processing will be described. As shown in FIG. 11, this process is also started when the main switch 25 is turned on (step # 31: Yes). As a result, the operation history record processing unit 12 reads out the defect occurrence history data 52 as the operation history data 50 recorded in the defect recording unit 40 to the work memory 26, and the defect recording processing unit 11 stores the defect record processing unit 11 in the defect recording unit 40. The recorded defect recording condition 70 is read out to the work memory 26 (step # 32). Next, the operation history record processing unit 12 determines whether or not a failure related to the failure item defined in the failure item table 31 has occurred (step # 33). Here, the operation history recording processing unit 12 monitors the occurrence of defects related to all the defect items defined in the defect item table 31, and a defect occurs when the defect determination condition defined for each defect item is satisfied. Is determined. If the defect item specified in the defect item table 31 has not occurred (step # 33: No), the process proceeds to step # 41. When a defect item defined in the defect item table 31 occurs (step # 33: Yes), the operation history record processing unit 12 applies the corresponding defect item in the defect occurrence history data 52 read to the work memory 26. "1" is added to the number of occurrences of (step # 34). Thereby, the operation history record processing unit 12 updates the defect occurrence history data 52 in the work memory 26. Then, the operation history record processing unit 12 records the updated defect occurrence history data 52 in the work memory 26 in the defect recording unit 40 (step # 35). Thereby, the defect occurrence history data 52 recorded in the defect recording unit 40 is also updated.

  Next, the defect recording processing unit 11 determines whether or not the defect item determined to have occurred in step # 33 is a defect item set as a recording trigger of the defect recording condition 70 read to the work memory 26. (Step # 36). If it is not a defect item set as a recording trigger for the defect recording condition 70 (step # 36: No), the process proceeds to step # 41. If the defect item relating to the defect that has occurred is a defect item set as a recording trigger of the defect recording condition 70 (step # 36: Yes), the defect recording processing unit 11 acquires the defect data 60 ( Step # 37). Specifically, the defect recording processing unit 11 acquires the instantaneous data 63 and the time-lapse data 64 from the record item data of the defect recording condition 70 stored in the buffer 27. Next, the defect recording processing unit 11 determines whether or not the defect data 60 has already been recorded in the first defect data recording area 61 (step # 38). If the defect data 60 is not recorded in the first defect data recording area 61 (step # 38: No), the defect data 60 acquired in step # 37 is stored in the first defect data recording area 61 of the defect recording unit 40. Record (step # 39). On the other hand, when the defect data 60 is recorded in the first defect data recording area 61 (step # 38: Yes), the defect data 60 acquired in step # 37 is used as the second defect data recording area of the defect recording unit 40. 62 (step # 40). When the defect data 60 is recorded in the second defect data recording area 62, the newly acquired defect data 60 is stored in the existing defect data 60 even when the defect data 60 is already recorded in the second defect data recording area 62. The defect data 60 is overwritten and recorded.

  The processes from step # 33 to step # 40 are repeatedly executed unless the main switch 25 is turned off (step # 41: No). If the main switch 25 is turned off (step # 41: Yes), the defect data recording process is terminated.

  Next, the procedure of the defect recording condition update process will be described. As shown in FIG. 12, this process is also started when the main switch 25 is turned on (step # 51: Yes), and the control unit 10 records the operation history data 50 recorded in the defect recording unit 40. Is read into the work memory 26 (step # 52). Here, the control unit 10 reads all the operation history data 51, the failure occurrence history data 52, and the operation state history data 53 as the operation history data 50 to the work memory 26. Next, the initial state determination unit 13 determines whether or not the driving history of the vehicle drive device 20 satisfies a predetermined attention attribute specifying condition based on the driving history data 51 (step # 53). In the present embodiment, the initial state determination unit 13 determines whether the number of main switch on / off included in the driving history data 51 (see FIG. 7) is a predetermined number (for example, 30 times) or more as the attention attribute specifying condition. Determine whether or not. If the attention attribute specifying condition is not satisfied (step # 53: No), the process proceeds to step # 60.

  If the attention attribute specifying condition is satisfied (step # 53: Yes), the attention attribute specifying unit 14 determines whether or not a predetermined first specific processing selection condition regarding the defect occurrence history data 52 is satisfied (step # 53). # 54). In the present embodiment, the attention attribute specifying unit 14 has the highest occurrence frequency among the occurrence frequency data of all the failure items included in the failure occurrence history data 52 (see FIG. 8) as the first specific process selection condition. It is determined whether the number of times of the data is equal to or greater than a predetermined number (for example, three times or more). When the first specifying process selection condition is satisfied (step # 54: Yes), the attention attribute specifying unit 14 specifies the defect attribute relating to the defect that is most likely to occur next as the attention attribute. Processing is executed (step # 55). The procedure of the first specifying process will be described later based on the flowchart shown in FIG. On the other hand, when the first specific process selection condition is not satisfied (step # 54: No), the attention attribute specifying unit 14 next satisfies whether or not a predetermined second specific process selection condition regarding the operation state history data 53 is satisfied. Is determined (step # 56). In the present embodiment, the attention attribute specifying unit 14 sets the operation state item table 32 among the data of all the operation state items included in the operation state history data 53 (see FIG. 9) as the second specifying process selection condition. It is determined whether or not there is at least one operation state item that exceeds the threshold defined in (1). When the second specifying process selection condition is satisfied (step # 56: Yes), the attention attribute specifying unit 14 specifies the defect attribute relating to the defect that is most likely to occur next as the attention attribute. Processing is executed (step # 57). The procedure of this 2nd specific process is demonstrated based on the flowchart shown in FIG. 14 later. If the second specific process selection condition is not satisfied (step # 56: No), the process proceeds to step # 60. In this case, the attention attribute specifying process by the attention attribute specifying unit 14 is not performed. Therefore, the defect recording condition 70 is not updated, and the previously set defect recording condition 70 is used as it is.

  When the attention attribute specifying unit 14 specifies the defect attribute relating to the defect most likely to occur next as the attention attribute by the first specifying process of step # 55 or the second specifying process of step # 57, the recording is performed. The condition updating unit 15 reads out the recording condition corresponding to the defect attribute identified as the attention attribute from the recording condition table 33 (step # 58). Thereafter, the recording condition update unit 15 sets the recording condition read in step # 58 as a new defect recording condition 70, and updates the defect recording condition 70 recorded in the defect recording unit 40 (step # 59). The processing from step # 52 to step # 59 is repeatedly executed unless the main switch 25 is turned off (step # 60: No). Therefore, if the failure occurrence history data 52 or the operation state history data 53 recorded in the failure recording unit 40 is updated in step # 17 of FIG. 10 or step # 35 of FIG. 11, the failure is based on the update result. The recording condition 70 is also updated. When the main switch 25 is turned off (step # 60: Yes), the defect recording condition update process is terminated.

  Next, the procedure of the first specifying process in step # 55 of FIG. 12 will be described. As shown in FIG. 13, in the first specifying process, first, the attention attribute specifying unit 14 extracts a defect item having the highest occurrence frequency from the defect occurrence history data 52 (step # 71). Next, the attention attribute specific | specification part 14 determines whether several malfunction items were extracted by step # 71 (step # 72). When only one defect item having the highest occurrence count is extracted (step # 72: No), the attention attribute specifying unit 14 determines the defect attribute related to the one defect item extracted in step # 71. Is acquired from the defect item table 31 (step # 73). On the other hand, when a plurality of defect items having the highest occurrence count are extracted (step # 72: Yes), the attention attribute specifying unit 14 determines the priority of each of the plurality of defect items extracted in step # 71. Obtained from the item table 31 (step # 74). And the attention attribute specific | specification part 14 acquires the defect attribute relevant to the defect item with the highest priority acquired by step # 74 from the defect item table 31 (step # 75). Then, the attention attribute specific | specification part 14 specifies the malfunction attribute acquired by step # 73 or step # 75 as an attention attribute (step # 76). The first specifying process is thus completed.

  Next, the procedure of the second specifying process in step # 57 of FIG. 12 will be described. As shown in FIG. 14, in the second specifying process, first, the attention attribute specifying unit 14 has a value exceeding the threshold value (see FIG. 4) defined in the operation state item table 32 from the operation state history data 53. An operation state item in which data is recorded is extracted (step # 91). Next, the attention attribute specific | specification part 14 determines whether several operation state items were extracted by step # 91 (step # 92). When only one operation state item is extracted (step # 92: No), the attention attribute specifying unit 14 sets a defect attribute related to the one operation state item extracted in step # 91 as an operation. Obtained from the status item table 32 (step # 93). On the other hand, when a plurality of operation state items are extracted in step # 91 (step # 92: Yes), the attention attribute specifying unit 14 sets the priority of each of the plurality of operation state items extracted in step # 91. Obtained from the operation state item table 32 (step # 94). And the attention attribute specific | specification part 14 acquires the malfunction attribute relevant to the operation state item with the highest priority acquired by step # 94 from the operation state item table 32 (step # 95). Then, the attention attribute specific | specification part 14 specifies the malfunction attribute acquired by step # 93 or step # 95 as an attention attribute (step # 96). The second specifying process is thus completed.

7). Other Embodiments (1) In the above-described embodiment, the case where the recording condition table 33 defines the sampling interval as the recording condition for each recording condition (that is, for each defect attribute) has been described as an example. However, the embodiment of the present invention is not limited to this, and, for example, defining a sampling interval for each recording item included in each recording condition is one of the preferred embodiments of the present invention. In the above embodiment, the case where only the sampling interval is defined in the recording condition table 33 and the sampling time derived by the recording condition updating unit 15 is set as the defect recording condition 70 has been described as an example. However, the embodiment of the present invention is not limited to this. For example, both the sampling interval and the sampling time may be defined in the recording condition table 33 as recording conditions. One.

(2) In the above embodiment, the ratio of the sampling time before the moment when the recording trigger is generated and the ratio of the subsequent sampling time are the same for the data of all the recording items constituting the time-lapse data 64 as the defect data 60. The case has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the ratio between the sampling time before the moment when the recording trigger occurs and the subsequent sampling time can be arbitrarily determined, and the previous or subsequent sampling time can be set to zero. In addition, it is also preferable to individually set the ratio between the sampling time before the moment when the recording trigger occurs and the sampling time after it for each recording item constituting the time-lapse data 64. In this case, a condition that defines the ratio of the sampling time before and after the moment when the recording trigger occurs is set as the defect recording condition 70.

(3) In the above embodiment, as an example, the defect recording unit 40 is provided with the first defect data recording area 61 and the second defect data recording area 62 as the recording area in which the defect data 60 is recorded. explained. However, the embodiment of the present invention is not limited to this. Therefore, for example, the defect recording unit 40 may have a configuration in which only one overwritable defect data 60 recording area corresponding to the second defect data recording area 62 is provided. One.

(4) In the above-described embodiment, whether or not the number of main switch on / off included in the driving history data 51 is a predetermined number (for example, 30 times) or more as the attention attribute specifying condition by the initial state determination unit 13 The case of determining is described as an example. However, the embodiment of the present invention is not limited to this, and any other condition can be used as long as it can be determined that sufficient operation history data 50 has been acquired for specifying the attention attribute by the attention attribute specifying unit 14. Can be set as the attention attribute specifying condition. Therefore, for example, a condition that the driving distance included in the driving history data 51 is equal to or greater than a predetermined distance, a condition that the driving time is equal to or longer than a predetermined time, and the like may be set as the attention attribute specifying condition. This is one of the embodiments.

(5) In the above embodiment, whether or not the recording condition update unit 15 has the same recording condition as the currently set defect recording condition 70 according to the attention attribute identified by the attention attribute identification unit 14. Regardless of the case, the case where the defect recording condition 70 is updated has been described as an example. However, the embodiment of the present invention is not limited to this. When the recording condition corresponding to the specified attention attribute is the same as the currently set defect recording condition 70, the defect recording condition 70 is updated. It is also suitable as a configuration that is not performed. In this case, the recording condition update unit 15 determines whether or not the current defect recording condition 70 recorded in the defect recording unit 40 is the same as the recording condition corresponding to the attention attribute specified by the attention attribute specifying unit 14. The determination is made, and if they are the same, the defect recording condition 70 is not updated.

(6) In the above embodiment, the case has been described as an example where the recording trigger as the recording condition is that the occurrence of the defective item defined in the defective item table 31 is the trigger condition. However, the embodiment of the present invention is not limited to this, and the recording trigger can be set to a trigger condition set regardless of the defect item. In this case, it is preferable that the recording condition table 33 defines the specific contents of the conditions that serve as the recording trigger, or records the association data to the storage location such as the table that defines the specific contents of the recording trigger. It is.

(7) In the above embodiment, when the conditions updated based on the operation history data 50 among the recording conditions constituting the defect recording condition 70 are a recording trigger, a recording item, a sampling interval, and a sampling time Was described as an example. However, the embodiment of the present invention is not limited to this, and the conditions updated based on the operation history data 50 may be only some of the conditions, and other conditions may be fixed. It is one of the preferred embodiments of the present invention. Therefore, for example, a configuration in which only the recording item is updated as the recording condition based on the operation history data 50 and the recording trigger, the sampling interval, and the sampling time are fixed, or the recording item is recorded as the recording condition based on the operation history data 50. A configuration in which the recording trigger is updated and the sampling interval and the sampling time are fixed is also a preferred embodiment of the present invention.

(8) In the above embodiment, the case where the defect data 60 includes the instantaneous data 63 and the time-lapse data 64 has been described as an example. However, the embodiment of the present invention is not limited to this, and the defect data 60 is composed only of the instantaneous data 63 or only the time-lapse data 64 is also a preferred embodiment of the present invention. One.

(9) In the above embodiment, a case where the attention attribute specifying unit 14 specifies the attention attribute by selectively using the two processes of the first specifying process and the second specifying process based on a predetermined condition will be described as an example. did. However, the embodiment of the present invention is not limited to this. Therefore, in another preferred embodiment of the present invention, the attention attribute specifying unit 14 may be configured to specify the attention attribute only by the first specifying process based on the defect occurrence history data 52. In this case, the operation state item table 32 of the table storage unit 30 is not necessary, and the operation history record processing unit 12 can be configured not to record the operation state history data 53 as the operation history data 50. Then, when the first specific process selection condition is not satisfied, the attention attribute specifying unit 14 does not specify the attention attribute, and thus the defect recording condition 70 is not updated. Similarly, it is also one of the preferred embodiments of the present invention that the attention attribute specifying unit 14 is configured to specify the attention attribute only by the second specifying process based on the operation state history data 53. In this case, the operation history recording processing unit 12 may be configured not to record the failure occurrence history data 52 as the operation history data 50. Then, the attention attribute specifying unit 14 does not determine the first specific process selection condition, and does not specify the attention attribute when the second specific process selection condition is not satisfied, so that the defect recording condition 70 is also updated. Not done.

(10) In the above-described embodiment, the operation history record processing unit 12 counts, as the failure occurrence history data 52, the number of occurrences of the failure related to the failure item defined in the failure item table 31 for each failure item. As an example, the configuration in which the recorded data is recorded in the defect recording unit 40 as the processed data has been described. However, the embodiment of the present invention is not limited to this. Therefore, for example, the operation history recording processing unit 12 counts, as the failure occurrence history data 52, the number of occurrences of failures related to the failure items defined in the failure item table 31 for each failure attribute related to each failure item. It is also one of preferred embodiments of the present invention to record the recorded data in the defect recording unit 40 as the processed data. In this case, the attention attribute specifying unit 14 can specify, as the attention attribute, the defect attribute having the largest number of occurrences of defects for each defect attribute included in the defect occurrence history data 52.

(11) In the above embodiment, the case where the defect attribute is defined corresponding to each part of the vehicle drive device 20 as the target device has been described as an example. However, the embodiment of the defect attribute according to the present invention is not limited to this example, and if the attribute to which the defect related to each defect item belongs is defined, the defect attribute is defined in another way. You can also Therefore, for example, it is also one of preferred embodiments of the present invention that the attributes are defined according to the nature of the problem, such as the rotation speed, temperature, current value, voltage value, number of times, and the like.

(12) In the above embodiment, the case where the target device is the drive device 20 for a hybrid vehicle has been described as an example. However, the application range of the defect data recording apparatus 1 according to the present invention is not limited to this. Therefore, for example, a drive device for an electric vehicle using only a rotating electrical machine as a drive source, another vehicle drive device such as an automatic transmission and a manual transmission in a vehicle using an engine (internal combustion engine) as a drive source, and various vehicles. Is also suitable as a target device. In addition to such vehicles and vehicle drive devices, when recording defect data for various devices such as various transport machines such as aircraft and ships, production equipment used in factories, etc., The defect data recording apparatus 1 according to the present invention can be suitably used.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a defect data recording device and a defect data recording program for recording data representing the state of a target device as defect data when a defect occurs in various target devices.

The block diagram which shows schematic structure of the malfunction data recording device which concerns on embodiment of this invention The schematic diagram which shows an example of the specific structure of the drive device for vehicles as an object apparatus. Diagram showing a specific example of the defect item table The figure which shows the specific example of an operation state item table The figure which shows the specific example of a recording condition table A diagram showing the details recorded in the defect recording section in more detail The figure which shows the concrete example of the data which is recorded as driving history data The figure which shows the specific example of the data currently recorded as malfunction occurrence history data The figure which shows the specific example of the data currently recorded as operation state history data Flow chart showing the procedure of the operation history data recording process Flow chart showing the procedure of defect data recording processing Flow chart showing the procedure of defect recording condition update processing Flow chart showing the procedure of the first specific process Flow chart showing the procedure of the second specifying process

Explanation of symbols

1: Failure data recording device 20: Vehicle drive device (target device)
11: Defect recording processing unit (defect data recording means)
12: Operation history recording processing unit (history data recording means)
13: Initial state determination unit (recording condition setting means)
14: Attention attribute specifying part (recording condition setting means)
15: Recording condition update unit (recording condition setting means)
31: Defect item table 32: Operation state item table 33: Recording condition table 40: Defect recording section (defect data recording means, history data recording means)
50: operation history data 51: operation history data 52: failure occurrence history data 53: operation state history data 60: failure data 61: first failure data recording area 62: second failure data recording area 63: instantaneous data 64: time-lapse data 70: Defect recording conditions

Claims (12)

When a problem occurs in the target device, a defect data recording device that records data representing the state of the target device as defect data,
Fault data recording means for recording the fault data in accordance with preset fault recording conditions;
Operation history data that is data including failure occurrence history data that is data of the number of occurrences for each of a plurality of failure items that specify the failures that may occur in the target device, and that represents the operation history of the target device. History data recording means for recording
Based on the operation history data, the failure attribute related to the failure that is most likely to occur next is specified as the attention attribute, and the recording condition for recording the failure data according to the attention attribute is used as the failure recording condition. Recording condition setting means to be set;
A defect item table that defines the defect attribute to which each of the plurality of defect items relates;
A recording condition table storing a plurality of recording conditions corresponding to each of the plurality of defect attributes,
The recording condition setting means extracts the defect item having the highest occurrence frequency based on the defect occurrence history data, and determines the defect attribute related to the extracted defect item based on the defect item table. When the defect attribute is specified as the attention attribute and there are a plurality of defect items having the highest occurrence frequency, the defect item having a higher priority is determined based on the priority order defined in advance for each defect item. The related defect attribute is specified as the attention attribute, a recording condition corresponding to the attention attribute is selected from a plurality of recording conditions stored in the recording condition table, and the selected recording condition is selected as the defect. A defect data recording device set as a recording condition . The operation history data includes operation history data that is data related to the operation history of the target device,
Before type recording condition setting means, on the basis of the operation history data, when the driving history of the target device does not satisfy a predetermined target attribute specified conditions, without particular the interest attribute, the initial setting recording conditions The defect data recording apparatus according to claim 1 , wherein is set as the defect recording condition. The defect attribute defect data recording apparatus according to claim 1 or 2 is set corresponding to each part of the target device. The recording condition, failure data recording apparatus according to any one of claims 1 3 including items and is recorded items to be recorded as the defect data. The recording condition, failure data recording apparatus according to any one of claims 1 to 4 comprising a recording trigger is a trigger condition for recording defect data by the defect data storage means. The defect data recording apparatus according to claim 5 , wherein the recording trigger includes one or more defect items selected from a plurality of defect items that define defects that may occur in the target device. The defect according to any one of claims 1 to 6 , wherein the recording condition includes one or both of a sampling interval that is an interval for sampling the defect data and a sampling time that is a time for continuing the sampling. Data recording device. The defect data recording apparatus according to any one of claims 1 to 7 , wherein the defect data is data of one or more variables representing a state of the target apparatus that changes in accordance with the operation of the target apparatus. The defect data includes instantaneous data representing the state of the target device at the moment when the defect occurs, and temporal data representing a temporal change in the state of one or both of the target devices immediately before and immediately after the occurrence of the defect. The defect data recording device according to any one of claims 1 to 8 . The defect data recording means includes a first defect data recording area in which defect data is recorded when the defect recording condition is first satisfied and overwriting is prohibited, and when the defect recording condition is satisfied after the second time. The defect data recording apparatus according to any one of claims 1 to 9 , further comprising a second defect data recording area in which the defect data is recorded by being overwritten on the previously recorded defect data. The target device, trouble data recording apparatus according to claim 1, any one of 10, which is a vehicle drive device. A failure data recording program for recording data representing the state of the target device as failure data when a failure occurs in the target device,
A defect data recording function for recording the defect data in a recording unit in accordance with preset defect recording conditions;
Operation history data that is data including failure occurrence history data that is data of the number of occurrences for each of a plurality of failure items that specify the failures that may occur in the target device, and that represents the operation history of the target device. A history data recording function for recording
Based on the operation history data, the failure attribute related to the failure that is most likely to occur next is specified as the attention attribute, and the recording condition for recording the failure data according to the attention attribute is used as the failure recording condition. A function to be set, wherein, at the time of the setting, based on the defect occurrence history data, the defect item having the highest occurrence frequency is extracted, and the defect item defining the defect attribute to which each of the plurality of defect items is related Based on the table, the defect attribute related to the extracted defect item is determined, the defect attribute is identified as the attention attribute, and when there are a plurality of defect items with the highest occurrence count, The defect attribute related to a defect item having a high priority based on a priority order defined in advance for the item The recording condition corresponding to the attention attribute is selected from the plurality of recording conditions based on a recording condition table that is specified as the attention attribute and stores a plurality of recording conditions corresponding to each of the plurality of defect attributes. A recording condition setting function for selecting and setting the selected recording condition as the defect recording condition ;
A defect data recording program for causing a computer to realize the above.

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