JP5223512B2 - Vehicle abnormality analysis system, vehicle abnormality analysis method, and vehicle failure analysis device - Google Patents

Description

  The present invention relates to a vehicle abnormality analysis system, a vehicle abnormality analysis method, and a vehicle failure analysis apparatus, and in particular, specifies a failure site in detail in a network in which a plurality of nodes are connected via a predetermined communication bus. The present invention relates to a vehicle abnormality analysis system, a vehicle abnormality analysis method, and a vehicle failure analysis apparatus.

2. Description of the Related Art Conventionally, a vehicle abnormality analysis system that identifies a cause of a failure that has occurred in a vehicle is known (for example, see Patent Document 1). In this abnormality analysis system, various vehicle information is always sent from each node to the communication bus, and the various vehicle information sent to the communication bus is stored in an internal memory. When a vehicle failure is detected, the vehicle information in the internal memory that is a predetermined time after the failure detection time is copied and stored in the storage device, and the relationship between the vehicle failure and the vehicle information is recorded as a defect list. Is done. Therefore, according to such a system, the failure list stored in the storage device can be referred to and used for failure analysis and examination of countermeasures after the failure detection.
JP 2005-43138 A

  However, in the above-described system, the data recorded in the internal memory or the storage device is only information flowing on the communication bus sent by each node. Normally, the data that each node sends to the communication bus is a part of the data held by the node, not all the data held. In order to perform failure analysis in detail and pinpoint the failure location, it is appropriate to refer to data that each node does not normally send to the communication bus. . In this regard, in the above-described system, failure analysis is not performed with high accuracy, and it is difficult to specify a detailed failure site.

  On the other hand, in order to solve the above problem, it is conceivable to cause each node to send all the data held to the communication bus. However, with this method, the communication load of the communication bus becomes excessive, and normal control data Transmission will be hindered.

  The present invention has been made in view of the above points, and it is possible to identify a faulty part with high accuracy without significantly disturbing transmission of normal control data from each node to a communication bus. An object of the present invention is to provide a vehicle abnormality analysis system, a vehicle abnormality analysis method, and a vehicle failure analysis device.

The above objects are respectively a plurality of nodes having normal data sending means for sending control data to a predetermined communication bus, and normal data receiving means for receiving control data sent from each node to the predetermined communication bus. A failure analysis device having a failure site estimation unit that estimates a failure site based on control data received by the normal data reception unit, the vehicle abnormality analysis system, the failure analysis device, When the failure part is estimated by the failure part estimation means, additional data transmission requesting a predetermined target node out of all nodes to send additional data necessary for analysis of the failure part different from normal control data and request means, wherein when a failure site was estimated by the failure site estimating means, of the predetermined among all the nodes other than the nodes of all or part The over-de, has a normal data transmission limit request means for requesting the stop of all or part of the transmission of control data to the predetermined communication bus by the normal data transmission means, each node, the failure analysis When the transmission of the additional data is requested from a device, additional data transmission means for transmitting the additional data to the predetermined communication bus, and stop of transmission of all or part of the control data from the failure analysis device are requested. If it is, hereinafter, anda delivery limiting means for stopping all or part of the transmission of control data to the predetermined communication bus by the normal data sending means, and the failure analysis apparatus, also , the additional data receiving unit that receives the additional data to be transmitted to the predetermined communication bus from said predetermined node, the additional data received by said additional data receiving means Based on a detailed site specifying means for specifying a failure portion in more detail than by estimation of the failure area estimation means is achieved by the abnormality analysis system for a vehicle having a.

In addition, the above-described object is to provide a normal data sending step in which each of a plurality of nodes sends control data to a predetermined communication bus, and a normal condition in which a failure analysis apparatus receives control data sent from each node to the predetermined communication bus. A vehicle failure analysis method comprising: a data reception step; and a failure site estimation step in which the failure analysis device estimates a failure site based on control data received in the normal data reception step, wherein the failure analysis device includes: When the failure part is estimated in the failure part estimation step, additional data for requesting a predetermined target node out of all nodes to send additional data required for analysis of the failure part different from the normal control data a delivery requesting step, when the failure analysis apparatus, failure site in the failure area estimation step is estimated, total Roh Normal data transmission restriction request that requests all or a part of nodes other than the predetermined target node to stop transmission of all or part of the control data to the predetermined communication bus in the normal data transmission step a step, each node, if the additional data sent from the failure analysis apparatus is requested, the additional data transmission step of transmitting the additional data to said predetermined communication bus, each node, the failure analysis apparatus A transmission restriction step for stopping transmission of all or part of the control data to the predetermined communication bus in the normal data transmission step after the transmission of all or part of the control data is requested from , additional data received said failure analysis apparatus, for receiving the additional data to be transmitted to the predetermined communication bus from said predetermined node And a detailed part specifying step for specifying the faulty part in more detail than that based on the estimation of the faulty part estimation step based on the additional data received in the additional data receiving step. This is achieved by the vehicle abnormality analysis method provided.

In addition, the above object is to connect the normal data receiving means for receiving control data transmitted from each node to the predetermined communication bus and connected to the plurality of nodes via the predetermined communication bus, and the normal data receiving A failure part estimation means for estimating a failure part based on control data received by the means, wherein the failure control apparatus for a vehicle has a normal control when the failure part is estimated by the failure part estimation means When the failure part is estimated by the additional data transmission request means for requesting a predetermined target node among all nodes to send additional data necessary for analysis of the failure part different from the data, and the failure part estimation means Requesting all or some of the nodes other than the predetermined target node to stop sending all or part of the control data to the predetermined communication bus. The normal data transmission restriction request means, and the additional data receiving unit that receives the additional data to be transmitted to the predetermined communication bus from the predetermined node, after the failure area is estimated by the failure area estimation means, wherein This is achieved by a vehicle failure analysis device comprising: detailed part specifying means for specifying a faulty part in more detail than that based on the estimation by the faulty part estimating means based on the additional data received by the additional data receiving means. .

  In the inventions of these aspects, each node normally sends control data to a predetermined communication bus, and the failure analysis apparatus receives the control data sent from each node to the communication bus and estimates a failure site. When the failure analysis apparatus estimates the failure site, the failure analysis device requests a predetermined target node among all nodes to transmit additional data necessary for analysis of the failure site different from the normal control data. Then, each node sends the additional data to the communication bus when the failure analysis device is requested to send additional data, and the failure analysis device receives the additional data sent from each node to the communication bus. And pinpoint the detailed fault location.

  According to such a configuration, the failure analysis apparatus estimates the failure part with a certain degree of accuracy based on the control data normally sent from the node, and then adds the additional data sent from the node according to the estimated failure part. Based on this, it becomes possible to specify a more detailed failure part. Also, each node normally only needs to send control data to the communication bus. When requested by the failure analysis device, additional data will be sent to the communication bus. It is not necessary for each node to always send additional data to the communication bus in order to identify a faulty part. Therefore, according to the present invention, it is possible to identify a faulty part with high accuracy without significantly disturbing transmission of normal control data from each node to the communication bus.

  In the above-described vehicle abnormality analysis system, the failure analysis apparatus has a database for storing the relationship between the failure part and the data state at each node, and the detailed part specifying means is received by the additional data receiving means. The failed part may be identified by checking the additional data to be checked against the relation stored in the database.

  Further, in the vehicle abnormality analysis method described above, the failure analysis apparatus has a database that accumulates a relationship between a failure part and a data state in each node, and the detailed part specifying step is received in the additional data receiving step. The failed part may be identified by checking the additional data to be checked against the relation stored in the database.

  In the vehicle failure analysis apparatus described above, the vehicle failure analysis apparatus includes a database that accumulates a relationship between a failure part and a data state in each node, and the detailed part specifying unit receives the additional data received by the additional data receiving unit. What is necessary is just to identify a failure site | part by collating with the said relationship accumulate | stored in the database.

  In the inventions of these aspects, when the failure analysis apparatus estimates the failure site, the failure analysis apparatus requests a restriction on sending of control data to the communication bus from nodes other than the predetermined target node among all nodes. Each node restricts transmission of normal control data after that when the restriction of transmission of control data is requested from the failure analysis apparatus. According to this configuration, it is possible to reduce the communication load of the communication bus when a predetermined target node sends additional data to the communication bus. For this reason, according to the present invention, the additional data sent from each node can easily flow to the communication bus, and it is possible to efficiently specify the detailed failure part in the failure analysis apparatus.

In the above-described vehicle abnormality analysis system, the failure analysis apparatus may send the additional data by the additional data sending unit of the predetermined target node after the faulty part is specified by the detailed part specifying unit , or the all predetermined other than the target node of the control data by the sending limiting means all or part of the nodes or by releasing a portion of the delivery stop, to the predetermined communication bus by the normal data sending means to each node The transmission of the control data may be resumed.

Further, in the vehicle abnormality analysis method described above, the failure analysis apparatus may transmit the additional data in the additional data transmission step of the predetermined target node after the failure site in the detailed site identification step is identified , or the all predetermined other than the target node of the control data in the delivery restriction step of all or some of the nodes or by releasing a portion of the delivery stop, to the predetermined communication bus in the normal data sending step on each node A normal data transmission resuming step for resuming transmission of the control data may be provided.

  In the inventions of these aspects, after the detailed failure part is specified, the failure analysis apparatus releases the restriction on sending additional data from a predetermined target node or sending control data from a node other than the predetermined target node. Then, each node is made to resume sending control data to the communication bus. According to such a configuration, since the transmission of control data from each node to the communication bus is resumed after the detailed failure part is specified, a network in which a plurality of nodes are connected via the communication bus is in a normal use state. It is possible to return automatically.

  In the vehicle abnormality analysis system described above, the failure analysis device may be a device mounted on a vehicle.

  According to the present invention, it is possible to identify a faulty part with high accuracy without significantly disturbing transmission of normal control data from a node to a communication bus.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration diagram of an in-vehicle network system including a vehicle abnormality analysis system according to a first embodiment of the present invention. This in-vehicle network system is a network system in which a plurality of in-vehicle electronic control units (in-vehicle ECUs) are connected for communication.

  The in-vehicle network system of the present embodiment includes a plurality of nodes 10 (specifically, node 10A, node 10B, and node 10C) as in-vehicle ECUs (three in the present embodiment) and the plurality of nodes 10. And a communication bus 12 to be connected to each other. The communication bus 12 is a time division multiplex communication line used for bidirectional communication such as CAN for transmitting data through a pair of communication lines.

  Each node 10 is mounted on a vehicle and detects a vehicle position and displays it on a display, a navigation device, an engine device that controls a vehicle engine, a brake device that controls a brake, an electric power steering device, a steering sensor, or It is an in-vehicle ECU mainly composed of a microcomputer provided in a yaw rate sensor or the like. Each node 10 includes a controller unit that is an arithmetic processing unit, an internal memory that stores various programs, an I / O input interface that is connected to various in-vehicle sensors and switches, and an operation input interface that can be operated by a vehicle occupant. And an output interface connected to a display, a buzzer, a speaker, and the like, and a communication interface connected to the communication bus 12.

  Each node 10 executes a predetermined process according to a program stored in its own internal memory. Specifically, an arithmetic process is performed for performing output via the output interface in response to input via the I / O input interface or the operation input interface. In addition, when self-diagnosis for diagnosing the presence / absence of a failure (for example, disconnection abnormality, input abnormality, output abnormality, calculation abnormality, etc. with a component such as a sensor to be connected) is performed at least when a failure occurs Stores the self-diagnosis result in the internal memory.

  The node 10 communicates with other nodes 10 through the communication bus 12 according to the communication protocol of the communication bus 12. That is, each node 10 has predetermined input data, calculation data, and output data (hereinafter referred to as control data) required by another node 10 that is a part of all input data, calculation data, and output data. The control data required by the own node 10 transmitted from the other node 10 is received and used for the arithmetic processing. Specifically, the control data to be sent to the other node 10 is sent to the communication bus 12 and the control data sent from the communication bus 12 to the own node 10 is received.

  Connected to the communication bus 12 is a data mining device 14 that performs processing for estimating and specifying a faulty part of the vehicle. The data mining device 14 is mounted on a vehicle and includes a controller 16 as an arithmetic processing unit connected to the communication bus 12 via an interface and a database 18 connected to the controller 16. The database 18 stores identification information of each node 10 and information on the presence / absence of a failure in the diagnosis result, and further, a plurality of event data regarding vehicle states (part abnormal states and vehicle normal states) that occur frequently at the same time. Are stored as correlated event relationships. The controller 16 refers to the event data stored in the database 18 and performs a process of estimating and identifying the failed part of the vehicle including the failed node 10.

  Next, with reference to FIG.2 and FIG.3, operation | movement of the abnormality analysis system for vehicles of a present Example is demonstrated. FIG. 2 is a diagram for explaining a method for specifying a detailed failure site of the vehicle in the vehicle abnormality analysis system of the present embodiment. FIG. 3 shows a flowchart of an example of a control routine executed by the controller 16 of the data mining device 14 and each node 10 in order to identify a detailed failure part of the vehicle in the vehicle abnormality analysis system of the present embodiment. .

  In the present embodiment, each node 10 performs a calculation process for performing an output in accordance with an input and performs a self-diagnosis process for diagnosing the presence or absence of a failure. Then, when diagnosing that a failure has occurred as a result of self-diagnosis, the self-diagnosis result is stored in the internal memory together with information on the failure occurrence time, and is transmitted to other nodes 10; and Other than the control data, all or a part of the input data, operation data, and output data obtained by the own node 10 that is not transmitted to the other nodes 10 are linked to the self-diagnosis result and stored in the internal memory. To do. It should be noted that all or a part of the input data, operation data, and output data obtained by the own node 10 are stored not only in the case where a self-diagnosis has occurred but also at all times. It may be done.

  Each node 10 also sends the control data to the communication bus 12 to transmit the control data to the other nodes 10 and the controller 16 together with the identification information of the own node 10 at an appropriate timing (for example, a predetermined cycle) at normal times. (Step 100). The control data sent to the communication bus 12 is a part of all input data, operation data, and output data of the node 10 that is the sending source, and is required by other nodes 10. Data only. The control data includes the self-diagnosis result in order to notify the other nodes 10 and the data mining device 14 of the self-diagnosis result of the node 10 itself.

  For example, as shown in FIG. 2A, the node 10A sends four control data A1, A2, A3, A4 to the communication bus 12, the node 10B sends one control data B1 to the communication bus 12, and The node 10C sends one control data C1 to the communication bus 12. Each node 10 receives control data necessary for its own node 10 out of the control data flowing to the communication bus 12 and uses it for arithmetic processing.

  The controller 16 of the data mining apparatus 14 can receive control data sent from each node 10 to the communication bus 12. When receiving the control data sent from the node 10 to the communication bus 12 (step 200), the controller 16 refers to the stored information in the database 18 and sends the self-diagnosis result and the control data contained in the control data. Based on the identification information of the node 10, it is determined whether or not a failure has occurred in the node 10 (step 202). As a result, if it is determined that a failure has occurred, the failed node 10 is specified, and further, the part where the failure of the failure node 10 occurs is estimated within the range of the information of the self-diagnosis result included in the transmitted control data (step 204).

  When the controller 16 estimates the failure part in the above step 204, the controller 16 refers to the accumulated information in the database 18 and adds necessary for analysis of all the failure parts correlated with the failure part among all the nodes 10. A node to which data transmission is to be requested (generally a failed node 10 but may include other non-failed nodes 10; hereinafter referred to as a target node). Identify. Then, a data frame requesting transmission of additional data to the identified target node is transmitted to the communication bus 12 (step 206).

  Each node 10 cannot receive an additional data transmission request transmitted from the data mining device 14 when the node 10 is not a target node, and does not receive the request (when negative determination is made at step 110). Thereafter, the control data is sent to the communication bus 12 at an appropriate timing as usual without performing any special processing.

  On the other hand, when the own node 10 is the target node, it can receive an additional data transmission request from the data mining device 14, and when the request is received (when an affirmative determination is made in step 110), it is held in the internal memory. The data necessary for the analysis of the above-mentioned failure part is extracted as additional data from the data being processed, and the additional data is sent to the communication bus 12 addressed to the controller 16 (step 112). For example, when the node 10B is the target node, when the node 10B receives the additional data transmission request from the data mining device 14, the data B2, B3, B8, B9 as additional data different from the normal control data B1. And the additional data is sent to the communication bus 12 as shown in FIG.

  The controller 16 of the data mining device 14 can receive additional data sent from the node 10 to the communication bus 12. When the controller 16 requests the additional data to be sent to the target node 10 and receives the additional data sent from the target node 10 to the communication bus 12 (step 210), the additional data is stored in the database 18. By collating with the correlated event data, the faulty part is specified in more detail than that by the estimation in step 204 described above (step 212).

  For example, normally, the controller 16 receives the control data B1 sent from the node 10B to the communication bus 12, determines the presence / absence of a failure of the node 10B based on the control data B1, and estimates the failure part. When it is determined that a failure has occurred in the node 10B, a request for sending additional data is made with the node 10B as the target node, and thereafter, additional data B2, B3 sent from the node 10B to the communication bus 12 B8 and B9 are received, and a more detailed failure part is specified based on the additional data B2, B3, B8, and B9.

  When the detailed identification of the faulty part is completed in step 212, the controller 16 then sends a data frame to the communication bus 12 for requesting cancellation of sending additional data to the target node (step 214).

  If the node 10 is not the target node and has not transmitted additional data different from the control data, the node 10 cannot receive a transmission cancellation request from the controller 16 of the data mining device 14. On the other hand, when the node 10 has transmitted additional data different from the control data as the target node, the node 10 can receive a transmission cancellation request from the controller 16 of the data mining device 14, and the controller of the data mining device 14. When the transmission cancellation request from 16 is received (step 120), transmission of additional data different from normal control data is canceled, and transmission of control data at an appropriate timing is resumed as usual (step 122).

  Thus, in the vehicle abnormality analysis system of the present embodiment, in a situation where each node 10 sends out control data, which is a part of all data of its own node 10, to the communication bus 12, a certain node 10 When the failure detection by the self-diagnosis is detected, by including the failure result of the self-diagnosis in the control data transmitted by the node 10, all the nodes 10 connected to the communication bus 12 are connected to the data mining device 14. It is possible to notify which of the nodes 10 has a failure, and to estimate the failed part of the vehicle within the range of the self-diagnosis result included in the control data.

  As a result, when the faulty part of the vehicle is estimated, the data mining device 14 requests the target node to send additional data necessary for the analysis of the faulty part, so that the target node Transmission to the communication bus 12 can be performed. Then, the data mining device 14 is made to receive additional data from the target node and collate with the stored information in the database 18 to specify a more detailed failure part than that estimated based on normal control data. Can do.

  According to such a configuration, the data mining device 14 estimates the failure site with a certain degree of accuracy based on the control data normally transmitted from the node 10, and then adds additional data to the target node according to the estimated failure site. It is possible to request transmission and specify a detailed failure site with higher accuracy based on additional data transmitted from the target node. For this reason, according to the present embodiment, it is possible to identify the faulty part with high accuracy.

  In addition, each node 10 suffices to send control data, which is usually a part of all data of its own node 10, to the communication bus 12, and additional data when requested by the data mining device 14. Therefore, it is not necessary for each node 10 to always send additional data to the communication bus 12 in order to specify the detailed failure part. For this reason, according to this embodiment, it is possible to prevent the communication load of the communication bus 12 from becoming excessive during normal operation, and normal control data sent from each node 10 to the communication bus 12 is transmitted to the communication bus. Therefore, it is possible to avoid the difficulty of flowing to 12.

  Therefore, according to the vehicle abnormality analysis system of the present embodiment, it is possible to identify the faulty part with high accuracy without much interruption of normal control data transmission from each node 10 to the communication bus 12. It has become. In addition, in such an abnormality analysis system, unlike the system in which additional data of each node 10 is always sent to the communication bus 12, it is not necessary to increase the processing capacity of the controller 16 of the data mining device 14 so much. It is not necessary to make the capacity of the network excessively large, and it is possible to specifically identify the failure site in each node 10 connected to the network with a simple and inexpensive configuration.

  Further, in the vehicle abnormality analysis system of this embodiment, based on the additional data transmitted from the target node to the data mining device 14 via the communication bus 12 in response to a request from the data mining device 14 to the target node. When the detailed failure part is specified, thereafter, the data mining device 14 is requested to cancel the transmission of the additional data to the target node, so that the target node cancels the transmission of the additional data to the communication bus 12. Can be made.

  According to such a configuration, even when the node 10 becomes a target node and starts to send additional data to the communication bus 12, after the detailed failure part is specified by the data mining device 14, the target node It is possible to cancel transmission of additional data to the communication bus 12 and resume transmission of control data as usual. For this reason, according to the present embodiment, even when the node 10 becomes the target node and sends additional data necessary for the analysis of the fault site to the communication bus 12, a plurality of nodes are analyzed after the analysis of the fault site is completed. The network in which 10 is connected via the communication bus 12 can be automatically returned to a normal use state in which each node 10 sends only control data to the communication bus 12.

  In the first embodiment, the data mining device 14 corresponds to the “failure analysis device” recited in the claims, and each node 10 performs the processing of step 100 in the routine shown in FIG. By executing the process of step 112, the “normal data sending unit” and the “normal data sending step” described in the claims by executing the “additional data sending unit” and the “normal data sending unit” described in the claims Each “additional data transmission step” is realized.

  In the first embodiment, the controller 16 of the data mining device 14 executes the process of step 200, whereby the “normal data receiving means” and the “normal data receiving step” described in the claims are performed. The "failure site estimation means" and the "failure site estimation step" described in the claims by executing the processing of steps 202 and 204 described in the claims by executing the processing of step 206. The "additional data transmission requesting means" and the "additional data transmission requesting step" execute the processing of step 210, whereby the "additional data receiving means" and the "additional data reception step" described in the claims are performed in step 212. "Detailed part specifying means" and "Details" described in the claims by executing the process Position specifying step "is described in the claims by performing the processing of step 214 the" normal data transmission resumption step "are realized respectively.

  The vehicle abnormality analysis system of the first embodiment described above is realized by causing each node 10 and the controller 16 of the data mining device 14 to execute the routine shown in FIG. In contrast, the vehicle abnormality analysis system according to the second embodiment of the present invention is realized by causing each node 10 and the controller 16 of the data mining device 14 to execute the routine shown in FIG. 4 instead of FIG. The

  FIG. 4 shows a flowchart of an example of a control routine executed by the data mining device 14 and each node 10 in specifying a detailed failure part of the vehicle in the vehicle abnormality analysis system of the present embodiment. In FIG. 4, steps that execute the same processing as the steps in the routine shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  That is, when the controller 16 of the data mining apparatus 14 estimates the failure part in step 204, it refers to the accumulated information in the database 18 and refers to the accumulated information of all the nodes 10 in relation to the failure part. A target node to which transmission of additional data required for analysis of the target is to be requested is specified, and a data frame requesting transmission of additional data to the target node is transmitted to the communication bus 12, and nodes other than the target node (target All of the nodes other than the node may be used, or only a part of them may be used (hereinafter referred to as non-target nodes). The data is sent to the communication bus 12 (step 250).

  Each node 10 cannot receive a normal control data transmission restriction request transmitted from the data mining device 14 when the node 10 is not a non-target node (determination at step 150). The control data is sent to the communication bus 12 at an appropriate timing. On the other hand, when the own node 10 is a non-target node, it is possible to receive a normal control data transmission restriction request from the data mining device 14 (affirmative determination in step 150). The transmission of control data to be transmitted to the communication bus 12 is restricted at a proper timing (step 152).

  For example, the node 10A has four data A1, A2, A3, and A4 as control data that are normally sent to the communication bus 12. However, when the node 10A receives a normal control data sending restriction request from the data mining device 14, The transmission of data A1, A2, A3, A4 is stopped. It should be noted that the normal control data transmission limit of the node 10 may be to stop transmission of all control data to be normally transmitted, but to stop transmission of a part of the control data and allow others to be transmitted. Also good. For example, when the node 10A receives a request for restricting transmission of normal control data from the data mining device 14, the node 10A stops sending data A2, A3, and A4 as control data, and can send only data A1 as usual. .

  Further, each node 10 cannot receive an additional data transmission request transmitted from the data mining device 14 when the node 10 is not a target node (determination of step 110). The control data is sent to the communication bus 12 at a proper timing or the sending of the control data is restricted as described above. On the other hand, when the own node 10 is a target node, it can receive an additional data transmission request from the data mining device 14 (affirmative determination in step 110), and when the request is received, it is held in the internal memory. From the data, the data necessary for the analysis of the above-mentioned failure part is extracted as additional data, and the additional data is sent to the communication bus 12 addressed to the controller 16 (step 112).

  When the detailed failure part identification is completed in step 212, the controller 16 then sends a data frame requesting release of the additional data to the target node to the communication bus 12, and normally to the non-target node. A data frame requesting release of control data transmission restriction is transmitted to the communication bus 12 (step 260).

  The node 10 does not transmit additional data different from the control data as a non-target node and restricts transmission of control data, and transmits additional data different from the control data as a target node. In both cases, the release request transmitted from the controller 16 of the data mining device 14 can be received.

  When the node 10 has transmitted additional data different from the control data as the target node, when receiving a cancellation request from the controller 16 of the data mining device 14 (step 160), the node 10 cancels the transmission of the additional data. Then, transmission of control data at an appropriate timing is resumed as usual (step 162). Further, when the control data transmission restriction is performed as the non-target node, when the cancel request from the controller 16 of the data mining device 14 is received (step 160), the control data transmission restriction is canceled and the control data is appropriately transmitted as usual. The transmission of control data at a proper timing is resumed (step 162). That is, when the node receives the release request from the controller 16 of the data mining device 14, the node cancels the transmission of the additional data when the node is the target node that has been sending the additional data, and restricts the transmission of the control data. If it is a non-target node, the restriction on sending control data is released.

  As described above, in the vehicle abnormality analysis system according to the present embodiment, when the failure part of the vehicle is estimated, the data mining device 14 is requested to send additional data necessary for the analysis of the failure part to the target node. By doing so, it is possible to achieve the same effect as the vehicle abnormality analysis system of the first embodiment described above.

  Further, in this abnormality analysis system, when a faulty part of the vehicle is estimated, the data mining device 14 is requested to send additional data to the target node, and at the same time, sending of normal control data to non-target nodes is restricted. The request can be made, and the non-target node can be restricted from sending the normal control data to the communication bus 12.

  According to this configuration, when the node 10 sends additional data to the data mining device 14 as a target node, the communication load on the communication bus 12 can be reduced. For this reason, according to the present embodiment, it is possible to prevent the additional data sent from the target node to the communication bus 12 from easily colliding with the normal control data sent from the other node 10 to the communication bus 12. it can. Therefore, according to the vehicle abnormality analysis system of the present embodiment, the additional data sent from the target node for specifying the detailed failure portion can easily flow to the communication bus 12, and the detailed failure in the data mining device 14 can be performed. It is possible to efficiently identify the part.

  Further, in the abnormality analysis system of this embodiment, based on the additional data from the target node after the transmission of the normal control data from the non-target node to the communication bus 12 is restricted in response to a request from the data mining device 14. When the detailed failure part is specified, thereafter, the data mining device 14 requests the non-target node to cancel the control data transmission restriction, whereby the non-target node sends the control data to the communication bus 12. Sending restrictions can be released.

  According to such a configuration, even when the node 10 becomes a non-target node and restricts the transmission of the normal control data to the communication bus 12, the data mining device 14 specifies the detailed failure part and then performs the non-processing. The restriction on sending control data from the target node to the communication bus 12 is released, and the sending of control data can be resumed as usual. For this reason, according to the present embodiment, even when the node 10 becomes a non-target node and the transmission of the normal control data to the communication bus 12 is restricted, the plurality of nodes 10 communicate with each other after the analysis of the failed part is completed. The network connected via the bus 12 can be automatically returned to a normal use state where each node 10 sends only control data to the communication bus 12.

  In the second embodiment described above, the controller 16 executes the processing of step 250 in the routine shown in FIG. 4 to thereby execute “normal data transmission restriction requesting means” and “normal data” described in the claims. In the “transmission restriction request step”, each node 10 executes the process of step 152, so that the “transmission restriction means” and the “transmission restriction step” described in the claims are the same. By executing the steps, the “normal data transmission resuming step” described in the claims is realized.

  By the way, in the first and second embodiments described above, each node 10 as an in-vehicle ECU has a self-diagnosis function for diagnosing the presence or absence of a failure with respect to the own node 10, and stores the self-diagnosis result in an internal memory. The self-diagnosis result is included in the control data transmitted to the other nodes 10 and the data mining device 14, but the present invention is not limited to this, and each node 10 does not have a self-diagnosis function. The control data transmitted to the other node 10 or the data mining device 14 may not include the self-diagnosis result. In this case, the data mining device 14 receives control data normally sent from the node 10 via the communication bus 12, and directly diagnoses the failure of the node 10 based on the control data. Then, when it is determined that a failure has occurred in the node 10 and the failure part is estimated within the range of the information of the diagnosis result, processing necessary for further detailed failure part analysis is performed as described above. According to such a modification, without causing each node 10 to perform self-diagnosis, it is possible to cause the data mining device 14 to diagnose the presence / absence of a failure in each node 10 and to estimate the failure site. It is possible to cause the data mining device 14 to collectively perform the processing from the estimation of the above to the analysis of the more detailed failure part.

1 is a configuration diagram of an in-vehicle network system including a vehicle abnormality analysis system according to a first embodiment of the present invention. It is a figure for demonstrating the method of pinpointing the detailed failure site | part of a vehicle in the vehicle abnormality analysis system of a present Example. It is a flowchart of an example of the control routine which a failure analysis apparatus and each node perform in specifying the detailed failure part of a vehicle in the abnormality analysis system for vehicles of a present Example. It is a flowchart of an example of the control routine which a failure analysis apparatus and each node perform when specifying the detailed failure site | part of a vehicle in the abnormality analysis system for vehicles of 2nd Example of this invention.

Explanation of symbols

10 nodes 12 communication bus 14 data mining device 16 controller 18 database

Claims (9)

A plurality of nodes each having normal data sending means for sending control data to a predetermined communication bus;
Normal data receiving means for receiving control data sent from each node to the predetermined communication bus; and failure part estimating means for estimating a failure part based on control data received by the normal data receiving means. A failure analysis device;
A vehicle abnormality analysis system comprising:
When the failure part is estimated by the failure part estimation means, the failure analysis device sends out additional data required for analysis of the failure part different from normal control data to a predetermined target node among all nodes. When the failure part is estimated by the additional data transmission requesting means and the failure part estimation means, the normal data sending means sends all or some of the nodes other than the predetermined target node to all or some of the nodes. Normal data transmission restriction requesting means for requesting stop of transmission of all or part of the control data to the predetermined communication bus ,
Each node includes an additional data transmission means for transmitting the additional data to the predetermined communication bus when the failure analysis apparatus requests transmission of the additional data, and all or one of the control data from the failure analysis apparatus. A transmission restriction unit for stopping transmission of all or part of the control data to the predetermined communication bus by the normal data transmission unit when a stop of transmission of the unit is requested , and
The failure analysis apparatus also includes an additional data receiving means for receiving the additional data to be transmitted to the predetermined communication bus from said predetermined nodes, based on said additional data received by said additional data receiving means The vehicle abnormality analysis system comprising: detailed part specifying means for specifying the faulty part in more detail than that estimated by the faulty part estimating means. The failure analysis apparatus has a database for storing the relationship between the failure part and the data state at each node,
The said detailed site | part specific means identifies a fault site | part by collating the said additional data received by the said additional data receiving means with the said relationship accumulate | stored in the said database. Abnormality analysis system for vehicles. The failure analysis apparatus, after the failure area is identified by the detailed site specific means, said transmission of additional data by the additional data transmission means of a predetermined node, or all other than the predetermined target node or one all control data by the sending limiting means of the node department or by releasing a portion of the delivery stop, characterized in that to resume the transmission of control data to the predetermined communication bus by the normal data sending means to each node The vehicle abnormality analysis system according to claim 1 or 2 . The vehicle abnormality analysis system according to any one of claims 1 to 3 , wherein the failure analysis device is a device mounted on a vehicle. A normal data sending step in which each of a plurality of nodes sends control data to a predetermined communication bus, a normal data receiving step in which the failure analysis device receives control data sent from each node to the predetermined communication bus, and a failure analysis A failure site estimation step in which the device estimates a failure site based on the control data received in the normal data reception step, and a vehicle abnormality analysis method comprising:
When the failure analysis apparatus estimates a failure site in the failure site estimation step, it sends out additional data required for analysis of the failure site different from normal control data to a predetermined target node among all nodes. An additional data transmission request step to request,
When the failure analysis apparatus estimates a failure site in the failure site estimation step, the predetermined communication in the normal data transmission step is sent to all or some of the nodes other than the predetermined target node among all nodes. A normal data transmission restriction request step for requesting stop of transmission of all or part of control data to the bus;
An additional data sending step for sending the additional data to the predetermined communication bus when each node is requested to send the additional data from the failure analysis device;
When each node is requested to stop transmission of all or part of the control data from the failure analysis device, all or part of the control data to the predetermined communication bus in the normal data transmission step is thereafter performed. A sending limit step for stopping sending,
An additional data receiving step in which the failure analysis apparatus receives the additional data sent from the predetermined target node to the predetermined communication bus;
A detailed part specifying step for specifying the faulty part in more detail than by the faulty part estimating step based on the additional data received in the additional data receiving step;
An abnormality analysis method for a vehicle, comprising: The failure analysis apparatus has a database for storing the relationship between the failure part and the data state at each node,
The detailed part identification step, according to claim 5, characterized in that a specific failure area by collating with the relationship stored in said database said additional data received in the additional data receiving step Abnormality analysis method for vehicles. The failure analysis apparatus, after the failure area in the detailed part identification step has been identified, wherein the delivery of the additional data in the additional data sending step of a predetermined node, or all other than the predetermined target node or one all control data in the sending limit step parts of the node or by releasing a portion of the delivery stop, usually data transmission to resume the transmission of control data to the predetermined communication bus in the normal data sending step on each node The vehicle abnormality analysis method according to claim 5, further comprising a restarting step. Normal data receiving means connected to a plurality of nodes via a predetermined communication bus and receiving control data transmitted from each node to the predetermined communication bus, and control data received by the normal data receiving means A vehicle failure analysis device having a failure site estimation means for estimating a failure site based on
When the failure part is estimated by the failure part estimation means, additional data transmission requesting a predetermined target node out of all nodes to send additional data necessary for analysis of the failure part different from normal control data Request means;
When the failure part is estimated by the failure part estimation means, all or part of the control data to the predetermined communication bus is sent to all or some of the nodes other than the predetermined target node. Normal data transmission restriction requesting means for requesting the stop of,
Additional data receiving means for receiving the additional data sent from the predetermined target node to the predetermined communication bus;
After the failure part is estimated by the failure part estimation unit, a detailed part that specifies the failure part in more detail than that based on the estimation of the failure part estimation unit based on the additional data received by the additional data reception unit Specific means,
A vehicle failure analysis apparatus comprising: It has a database that accumulates the relationship between the failure location and the data status at each node
The detailed part identification means, according to claim 8, characterized in that a specific failure area by collating with the relationship stored in said database said additional data received by said additional data receiving means Vehicle failure analysis device.

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