KR101603549B1 - In-vehicle network system and method for diagnosing the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network system capable of diagnosing a faulty area more efficiently in a vehicle network and a diagnosis method thereof. A method of diagnosing a fault in a controller of a vehicle network including at least one joint connector for wired connection of a plurality of controllers to a coaxial cable according to an embodiment of the present invention includes detecting a fault for at least one other controller; Determining a joint connector belonging to a plurality of controllers detected as a failure by referring to a table according to a structure of the vehicle network when the number of the controllers detected as the failure is plural; And storing a failure code corresponding to the joint connector and a failure code corresponding to each of the plurality of controllers detected as a result of the determination.

Description

TECHNICAL FIELD [0001] The present invention relates to a vehicle network system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network system capable of diagnosing a faulty area more efficiently in a vehicle network and a diagnosis method thereof.

In recent years, vehicles have been increasingly used in vehicle networks such as BCM / ETACS (Body Control Module / Electronic Time & Alarm Control System), ABS ECU (Anti-lock Brake System Electronic Control Unit) Most of the nodes are composed of ECU (electronic controller). These ECUs receive a vehicle diagnostic service for safe and economical vehicle operation, which can prevent a vehicle malfunction in advance and provide various vehicle information such as vehicle driving record management and statistical information.

These controllers are connected by wire. When a communication line connecting a controller at one end of a network and a controller at another end is referred to as a " line ", a communication line connecting the controller and each controller may be referred to as a " branch line ". In this case, when a branch is branched to a plurality of branch lines at one point of the main line, a connector for physically wiring branch lines to the main line at the corresponding branch may be referred to as a joint connector (JC).

The above-described network structure will be described with reference to FIG.

1 shows an example of a general vehicle network structure.

Referring to FIG. 1, a vehicle network is composed of wires (CAN, Flexray, etc.) for network communication for controlling various control period coordination. More specifically, the controller 1 and the controller 2 perform the role of a terminating resistor to the terminating controller. The two controllers are connected by a main line, and the main line is connected to the other controllers through a plurality of joint connectors. For example, in the joint connector 1 110, the controller 3 130, the controller 4 140, and the controller 5 150 are connected to the main line via each branch line.

In such a network, when a communication problem occurs in the controller, timeout diagnosis is performed not only by the corresponding controller but also by the relative controller. For example, if controllers 4 through 8 are to receive data periodically transmitted by controller 3, if there is a problem with branch 130 connecting controller 3 130 and controller 1 110, 4 to 8 can not receive the data that the controller 3 periodically transmits. Therefore, when the controller 4 or 8 does not receive the signal for a predetermined time, it senses the CAN timeout for the controller 3 and records it in the internal memory. If a diagnostic is then connected to the on-board diagnostics (OBD) terminal of the system to request error information, each controller can signal that a CAN timeout error has occurred for controller 3. Therefore, at the workshop, it can be determined that a failure has occurred in the controller 3 or the branch line 130 thereof.

However, if the controllers 3 to 5 become unable to communicate due to breakage or failure of the joint connector 1, the controllers 6 to 8 display the timeout failure diagnosis codes of the controllers 3, 4, and 5. However, if the maintenance station does not know the wiring relationship (that is, the circuit diagram) of each control period, it is necessary to individually check whether there is a branch line problem of the controllers 3 to 5. If there is no problem, there is a trouble to find a faulty area by checking the circuit diagram.

The present invention provides a network system capable of diagnosing a faulty area more efficiently in a vehicle network and a diagnostic method therefor

Particularly, the present invention is to provide an apparatus and a method that can efficiently determine whether a joint connector fails if there are a plurality of controllers connected to a main line through a joint connector.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided a vehicular controller including: a wired communication module that is connected to an outside and performs data exchange; A memory for storing a table according to a structure of a vehicle network; And a controller configured to detect a failure of at least one other diagnostic device using data received through the wired communication module and, if there are a plurality of other controllers detected as failures, And a control module that controls the joint connector to determine whether the joint connector belongs to the joint connector and the fault code corresponding to the plurality of controllers detected in the fault are stored in the memory.

According to another aspect of the present invention, there is provided a fault diagnosis method for a controller for a vehicle network including at least one joint connector for connecting a plurality of controllers according to an embodiment of the present invention to a main line, Detecting faults for one other controller; Determining a joint connector belonging to a plurality of controllers detected as a failure by referring to a table according to a structure of the vehicle network when the number of the controllers detected as the failure is plural; And storing a failure code corresponding to the joint connector and a failure code corresponding to each of the plurality of controllers detected as a result of the determination.

According to another aspect of the present invention, there is provided a method for diagnosing a vehicle network including at least one joint connector for wired connection of a plurality of controllers to a main line, Receiving at least one failure code from each of the controllers constituting the failure code; Determining, when a plurality of controllers corresponding to the at least one failure code are present, a joint connector to which the plurality of controllers belong commonly by referring to a table according to the structure of the vehicle network; And outputting the received at least one failure code and a failure code corresponding to the determined joint connector as failure information.

According to another aspect of the present invention, there is provided a diagnostic apparatus including: a wired communication module connected to a vehicle network including at least one joint connector for wired connection of a plurality of controllers to a main line; ; A memory for storing a table according to the structure of the vehicle network; When at least one failure code is received from each controller constituting the vehicle network, and when there are a plurality of controllers corresponding to the at least one failure code, the plurality of controllers judge Control module; And an output unit for outputting the received at least one failure code and a failure code corresponding to the determined joint connector as failure information.

In a network including a coaxial connector connecting a plurality of controllers through a controller or a diagnostic device related to at least one embodiment of the present invention configured as described above, the diagnosis can be more efficiently performed.

In particular, when a failure code is displayed for a plurality of diagnostic devices, information on a joint connector shared by the controllers is obtained, thereby enabling efficient diagnosis of a failure.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

1 shows an example of a general vehicle network structure.
2 is a flowchart illustrating an example of a process for diagnosing and diagnosing a failure in a controller according to an exemplary embodiment of the present invention.
3 is a flowchart illustrating an example of a process of diagnosing and diagnosing a failure in a diagnostic device according to an exemplary embodiment of the present invention.

Hereinafter, a network diagnostic method related to the present invention will be described in detail with reference to the drawings. The suffix "module" and "part" for the Ethernet component used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

As described above, when a failure code for a plurality of diagnostic devices is exposed and the diagnostic devices in which a failure occurs are connected to the main line via a specific joint connector, this is likely to be a problem of the corresponding connector. This is because there is a high probability that a plurality of controllers connected through the same joint connector fail together or a problem occurs in the joint connector rather than the probability that the branches of the controllers are disconnected together.

Accordingly, in one embodiment of the present invention, it is proposed that information on a joint connector shared by a plurality of controllers corresponding to a failure code displayed at the time of a failure diagnosis is provided. Such a function may be performed by a controller that detects a failure, or through a diagnostic unit connected to a vehicle. For this purpose, it is preferable that a table in which the controllers connected to each joint connector are classified based on the actual circuit is referred to in the controller or the diagnostic unit.

Table 1 below shows an example of the table configuration in which the controllers connected to each joint connector in the network as shown in FIG. 1 are classified.

J / C1 J / C 2 J / C3 J / C 4 ... Controller 3 Controller 6 Controller 9 The controller 12 Controller 4 Controller 7 The controller 10 Controller 13 Controller 5 Controller 8 The controller 11 Controller 4

When such a table is provided in each controller, information on the joint connector to which the table belongs may be excluded. This is because if the joint connector to which it belongs fails, it is impossible to communicate with all other controllers, so that the failure code expression is meaningless.

When each of the controllers judges that the plurality of other controllers have failed due to the timeout diagnosis, the controller also stores a failure code for the joint connector to which the controllers judged to have failed based on the table held by the controllers are commonly belonging.

For example, it is assumed that the joint connector 1 is broken in the network as shown in Fig. In this case, each of the controllers 6 to 8 diagnoses the CAN timeout for the controllers 3 to 5, and can display the failure code for the joint connector 1 with reference to the table as shown in Table 1. [

Then, when the diagnosis unit is connected and requests the stored fault information, the controller transmits the fault code to the joint connector together with the fault code for the other controller together with the fault information.

The above-described process is shown in Fig.

2 is a flowchart illustrating an example of a process for diagnosing and diagnosing a failure in a controller according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the controller monitors data transmitted from other controllers, and when the corresponding data is not received for a predetermined time from the timing at which the data should be received, the controller diagnoses the CAN timeout for the other controller that transmits the data A failure can be detected (S210).

If there are a plurality of other controllers in which a failure has been detected (S220), the controller performs matching for a wiring group (i.e., a joint connector) of the controllers whose failures have been detected by referring to the pre-stored table at step S230. In this case, the controller stores the failure code for the other controllers that have detected the failure and the failure code for the corresponding joint connector, together with failure information, if there is a joint connector to which the other controllers having the failure are commonly connected (S240). On the other hand, if there is only one controller that has detected a failure, or if there is no joint connector common to the table as a result of the table inquiry, only the failure code for the controller that detected the failure can be stored.

If the diagnostic unit is connected to the diagnostic unit, the controller can provide the stored diagnostic information to the diagnostic unit (S250).

3 is a flowchart illustrating an example of a process of diagnosing and diagnosing a failure in a diagnostic device according to an embodiment of the present invention.

First, when the diagnostic unit is connected to the vehicle through the OBD terminal, the diagnostic unit requests fault information from each controller and receives the fault information (S310).

If a failure code for a plurality of controllers is included in the failure information as a result of the failure information reception (S320), it is determined whether or not there is a joint connector to which the controllers corresponding to the failure codes belong commonly through wiring matching on the table stored in advance (S330). At this time, the controller may consider whether or not each CAN timeout diagnosis is sensed during the same driving cycle in determining the joint connector to which it belongs. This is because, if a problem occurs with a joint connector, the diagnostics connected to that joint connector will cause a timeout at the same drive cycle (ie, when the problem occurs).

The diagnostic unit may output the information on the received failure codes and the information about the joint connector to which the failure-detected controllers belong, if any, to the diagnosis result (S340). On the other hand, if there is only one controller that detects a failure, or if there is no common joint connector as a result of a table inquiry, only the information on the controller with a failure can be output as a diagnosis result.

In order to perform the above-described embodiments, the controller according to the present invention stores a table prepared in advance for information on controllers connected to each other by a joint connector according to a circuit structure, Memory, and wired communication module. However, the CAN timeout diagnosis of other diagnostic devices is performed using the data received through the wired communication module, and the wiring group matching / fault code display according to the diagnosis result is performed And a control module. Of course, the controller may include more components as needed, and each function such as diagnosis, group matching, and code expression may be separately processed through a plurality of control modules. On the other hand, a failure code for the controller or the joint connector which is displayed can be stored in the above-mentioned memory or a separate memory.

In addition, in order to perform the above-described embodiments, the diagnostic apparatus according to the present invention may include a wired communication module connected to the ODB terminal for performing data exchange with the vehicle network, information on controllers connected to each joint connector according to the circuit structure, A memory for storing a table, a memory and a wired communication module, a control module for performing wiring group matching according to the number of fault codes received in response to a request through the wired communication module, and a matching result And an output unit for visually outputting information on the received failure code or transmitting the information to another device. Of course, the diagnostics may include more components than necessary.

The network system and the diagnostic method described above are not limited to the configuration and method of the embodiments described above, but the embodiments may be modified such that all or some of the embodiments are selectively And may be configured in combination.

Claims (14)

A method for diagnosing a fault in a controller of a wired communication network for a vehicle including at least one joint connector for connecting a plurality of controllers to a main line by wire,
The control module of the controller detecting a fault to at least one other controller;
Determining, by the control module, a joint connector belonging to a plurality of controllers detected as a failure by referring to a table according to the structure of the wired communication network when the number of the controllers detected as the failure is plural; And
The control module storing a failure code corresponding to the joint connector and a failure code corresponding to each of the plurality of controllers detected in accordance with the determination result in the memory of the controller,
The table includes:
And matching information for a plurality of controllers connected to at least one joint connector included in the wired communication network.
delete The method according to claim 1,
The table includes:
Wherein the information about the joint connector to which the controller is connected is excluded. The method according to claim 1,
Wherein the detecting comprises:
And when said specific data is not received for a certain period of time from the timing at which specific data should be received for said at least one other controller, said control module judges a controller to which said specific data is transmitted, Diagnostic method. The method according to claim 1,
Receiving an external diagnostic unit through the wired communication module of the controller to request for fault information; And
And the control module transmits the stored fault code through the wired communication module with the fault information. A wired communication module for performing data exchange with the outside;
A memory for storing a table according to a structure of a wired communication network for a vehicle; And
Wherein the control unit detects a failure of at least one other diagnostic unit using data received through the wired communication module, and when a plurality of other controllers are detected as malfunctions, And a control module for determining a joint connector and controlling a failure code corresponding to the joint connector and a failure code corresponding to each of the plurality of controllers detected as a result of the determination to be stored in the memory,
The table includes:
And matching information for a plurality of controllers connected by at least one joint connector included in the wired communication network. delete The method according to claim 6,
The table includes:
Wherein the information about the joint connector to which the controller is connected is excluded. The method according to claim 6,
The control module includes:
And performs the fault detection by determining a controller that transmits the specific data when the specific data is not received over a certain period of time from a timing at which specific data should be received for the at least one other controller. The method according to claim 6,
The control module includes:
And transmits the stored fault code to the fault information when an external diagnostic unit is connected and the fault information is requested. 1. A method for diagnosing a wired communication network for a vehicle including at least one joint connector for wired connection of a plurality of controllers to a main line in a diagnostic apparatus,
Receiving at least one failure code from each controller constituting the wired communication network through a wired communication module;
Determining, when a plurality of controllers corresponding to the at least one failure code are present in the control module, a joint connector to which the plurality of controllers belong commonly by referring to a table according to the structure of the wired communication network; And
And outputting the received at least one failure code and a failure code corresponding to the determined joint connector as failure information through an output unit,
The table includes:
And matching information for a plurality of controllers connected to at least one joint connector included in the wired communication network. delete A wired communication module connected to a CAN communication network for a vehicle including at least one joint connector for wired connection of a plurality of controllers to a main line;
A memory for storing a table according to the structure of the CAN communication network;
When at least one failure code is received from each controller constituting the CAN communication network, and when there are a plurality of controllers corresponding to the at least one failure code, the plurality of controllers judge Control module; And
And an output unit for outputting the received at least one failure code and a failure code corresponding to the determined joint connector as failure information,
The table includes:
And matching information for a plurality of controllers connected by at least one joint connector included in the CAN communication network. delete

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