KR20160086035A

KR20160086035A - Diagnostic system in a vehicle, controlling method thereof and stability control sensor therein

Info

Publication number: KR20160086035A
Application number: KR1020150003137A
Authority: KR
Inventors: 이정세
Original assignee: 주식회사 만도
Priority date: 2015-01-09
Filing date: 2015-01-09
Publication date: 2016-07-19

Abstract

The present invention provides a diagnostic system for a vehicle. The diagnostic system of a vehicle according to the present invention includes a sensor unit for sensing the attitude of the vehicle and an attitude control unit for controlling the attitude of the vehicle based on the detected attitude of the vehicle, And the fault information is stored in the sensor unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a diagnostic system for a vehicle, a control method thereof, and a posture control sensor included therein,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diagnostic system for a vehicle and a control method thereof, and more particularly to a method for diagnosing errors in a yaw sensor, a lateral acceleration sensor and a longitudinal acceleration sensor installed in a vehicle.

Generally, a diagnosis system of a vehicle is connected to a gateway mounted in a vehicle and a plurality of electronic controllers (ECUs) via CAN communication for diagnosis.

For example, if a CAN communication failure occurs in the vehicle diagnostic communication process, the cause of the failure is not clearly identified. More specifically, in recent years, a variety of electronic and communication technologies have been converged to increase the number of ECUs using CAN communication, and the cooperation control between them has been increasing, and it is difficult to identify the causes of CAN communication failures due to various paths and phenomena .

If a failure occurs in the CAN communication line, the diagnosis communication itself may not be possible because it affects the entire vehicle communication network. Even if it is possible, a diagnosis trouble code (hereinafter referred to as " DTC ") is generated.

In addition, there is a problem that the cause of the failure can not be determined because the DTC of the sensor itself does not occur in response to the sensor error occurring when the vehicle is running. Specifically, when a failure occurs due to the driving characteristics of the vehicle, the problematic phenomenon is recognized by reproducing the sensor by installing the sensor in the same vehicle type. If reproduction is impossible, it is impossible to determine the cause of the trouble, which makes it difficult to solve the problem and the reliability of the customer may be lowered.

In order to solve the above-described problems, the embodiments of the present invention solve the problem that it is impossible to determine the cause of the failure because the DTC of the sensor itself does not occur in response to an error occurring in the sensor when the vehicle is running.

It is also an object of the present invention to solve the problem of failing to identify the cause of a failure occurring in the cooperative control between a controller and a sensor of a vehicle.

Also, it is aimed to solve the problem that the cause of fault is insufficient when the CAN communication failure occurs in the vehicle diagnosis communication process.

According to an embodiment of the present invention, there is provided a vehicle comprising: a sensor unit for sensing a posture of a vehicle; And a posture control unit for controlling the posture of the vehicle on the basis of the sensed posture of the vehicle, wherein the posture control unit makes a list of the failure information of the sensor unit or the posture control unit, A diagnostic system of the vehicle to be stored in the sensor unit can be provided.

In addition, the failure information may mean failure of at least one of operation information of the sensor unit, posture control information of the posture control unit, and communication information between the sensor unit and the control unit.

The sensor unit may further include: a sensor module for measuring a posture of the vehicle; And a control module for controlling the sensor module and storing the list of the malfunction information.

In addition, the failure of the operation information of the sensor unit or the communication information between the sensor unit and the control unit can be transmitted to the posture control unit and can be tableized.

The communication information between the sensor unit and the control unit may include CAN communication.

According to another embodiment of the present invention, there is provided a method of controlling a vehicle, comprising the steps of: sensing a posture of a vehicle; controlling the posture of the vehicle based on the sensed posture of the vehicle; And a diagnostic method of the vehicle in which the listened fault information is stored in the attitude detection sensor.

In addition, the failure information may indicate failure of at least one of an operation failure of the posture detection sensor, a posture control operation failure, and an attitude control communication failure.

Further, the posture control communication failure may include a CAN communication failure at the time of controlling the posture of the vehicle.

According to another embodiment of the present invention, there is provided an information processing apparatus including a sensor module for measuring a posture of a vehicle and a control module for controlling the sensor module, And may include an attitude control sensor of the vehicle.

Also, the control module may transmit failure information of the sensor module or communication failure information of the sensor module and the vehicle control unit to the vehicle control unit, and receive and store the posture failure information indexed by the vehicle control unit.

The embodiments of the present invention can solve the problem that it is impossible to determine the cause even if a faulty sensor is collected because the DTC of the sensor itself does not occur due to the error of the sensor when the vehicle is running.

It is also an object of the present invention to solve the problem that it is not possible to grasp the cause of the failure occurring in the cooperative control between the controller and the sensor of the vehicle.

In addition, when a CAN communication failure occurs in the vehicle diagnostic communication process, it is possible to solve the problem that it is difficult to identify the cause of the failure.

1 is a block diagram of a diagnostic system for a vehicle according to the present invention.
2 is a block diagram showing the configuration of a posture control unit of a diagnostic system for a vehicle according to an embodiment of the present invention.
3 is a configuration block diagram of a sensor unit constituting a diagnostic system of a vehicle according to an embodiment of the present invention.
4 is a flowchart of a method of diagnosing a vehicle according to an embodiment of the present invention.
5 is a flowchart of a method of diagnosing a vehicle according to another embodiment of the present invention.
6 is a flowchart of a method of diagnosing a vehicle according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

1 is a block diagram of a diagnostic system 100 for a vehicle in accordance with the present invention. As shown, the diagnostic system 100 for a vehicle according to the present invention includes a posture control unit 1 and a sensor unit 2. 2 shows a configuration block diagram of the posture sensor unit 2 of the diagnostic system 100 of the vehicle according to the present invention, and Fig. 3 shows the posture control unit 1. As shown in Fig.

2, the sensor unit 2 controls the sensor module 21 and the sensor module 21 that sense the posture of the vehicle and outputs the output value from the sensor module 21 to the posture control unit 1). &Lt; / RTI >

The sensor module 21 includes a yaw sensor 210, a lateral acceleration sensor 211, and a longitudinal acceleration sensor 212. In addition, an integrated sensor including both the yaw sensor 210, the lateral acceleration sensor 211, and the longitudinal acceleration sensor 212 may be provided.

The yaw sensor 210 detects yaw moment when the vehicle rotates about the vertical axis. Specifically, the yaw sensor 210 electronically senses the yaw moment of the vehicle while the flick fork inside the yaw sensor changes the vibration. There is a cesium crystal element inside the yoshi sensor, and when the vehicle turns and moves, the cesium crystal element itself generates a voltage while rotating. The yaw moment of the vehicle can be detected based on the voltage thus generated.

The lateral acceleration sensor 211 can detect movement of both sides of the vehicle (hereinafter referred to as " lateral direction "). The lateral acceleration sensor 211 is a transverse sensor of the acceleration sensor that detects a change in the transverse velocity per unit time and detects dynamic forces such as acceleration, vibration, shock, and the like, and detects inertial force, Can be measured using the principle.

The longitudinal acceleration sensor 212 can sense the movement of the front and rear of the vehicle (hereinafter referred to as the longitudinal direction). The longitudinal acceleration sensor 212 is a longitudinal sensor of the acceleration sensor. The longitudinal acceleration sensor 212 senses a dynamic force such as an acceleration, a vibration, and an impact by detecting a change in the longitudinal velocity per unit time. The acceleration sensor detects an inertial force, Can be measured using the principle.

The control module 22 is capable of collectively controlling the sensor unit 2 and includes a processor 220, a memory 221, and a communication unit 222.

The processor 220 mediates data input / output between various sensors (the yaw sensor 210, the lateral acceleration sensor 211, the longitudinal acceleration sensor 212) included in the sensor unit 2 and the control module 22, And also mediates data input / output between the sensor unit 2 and the posture control unit 1. [ In addition, the sensor unit 2 can be controlled as a whole.

The memory 221 may store a control program and control data for controlling the operation of the sensor unit 2, a sensor value sensed by the sensor module 21, and a table of the failure information received from the posture control unit 1. [ That is, by storing the table of the failure information received from the posture control unit 1, it is possible to easily analyze the failure information when the sensor unit 2 is collected from the vehicle.

The memory 221 may store not only volatile memories such as S-RAM and D-RAM but also flash memory, ROM, erasable programmable read only memory (EPROM) (Electrically Erasable Programmable Read Only Memory (EEPROM)).

Specifically, the non-volatile memory may semi-permanently store a control program and control data for controlling the operation of the diagnostic system 100 of the vehicle, and the volatile memory may temporarily store the control program and control data from the non-volatile memory And can temporarily store various control signals output from the failure information table control module 22 of the vehicle received by the posture control unit 1. [

3, the posture control unit 1 includes a signal processing module 11, a sensor failure processing module 12, a failure information processing unit 13, and a communication unit 14. [

The signal processing module 11 processes the output value of the sensor received from the sensor unit 2. [ Specifically, the sensor values measured by the yaw sensor 210, the lateral acceleration sensor 211 and the longitudinal acceleration sensor 212 of the sensor module 21 included in the sensor unit 2 are stored in the sensor unit 2, Via the communication unit 14, and can generate a control signal for controlling the vehicle depending on the received sensor value.

For example, when the yaw sensor value measured through the yaw sensor 210 exceeds a threshold value preset by the signal processing module 11, a control signal is calculated to perform the attitude control of the vehicle. Likewise, when the lateral acceleration value or the longitudinal acceleration value measured by the lateral acceleration sensor 211 or the longitudinal acceleration sensor 212 exceeds a preset threshold value in the signal processing module 11, And calculates a control signal.

The sensor failure processing module 12 may be configured to detect a malfunction in the case where a control error occurs in the signal processing module 11 or an abnormality occurs in receiving the output value of the sensor from the communication unit 14 and outputting the control value thereto, (2) detects an abnormality.

For example, a case where a communication failure occurs between the communication unit 222 in the sensor unit 2 and the communication unit 14 in the posture control unit 1. Specifically, when a transmission value and a reception value are different between a rolling count, that is, a message transmission / reception between the communication unit 222 in the sensor unit 2 and the communication unit 14 in the posture control unit 1, It is possible to detect a case where the Check value of the data by the equation is different.

As another example, the sensor failure processing module 12 may be configured such that the value of each signal received by the sensor module 21 exceeds the range calculated for attitude control in the attitude control unit 1, If it exceeds the allowable range, it can be detected as a failure.

In addition, when the sensor output value received by the sensor module 21 in the sensor unit 2 is physically repeatedly changed, or when the sensor output value received by the sensor temporarily changes greatly, Can be detected as a failure.

In addition, if there is no change in the sensor output value regardless of the driving state of the vehicle received by the sensor unit 2, it can be detected as a failure.

Further, when it is determined that the difference between the signal value calculated through the steering wheel change (not shown) and the received signal value received according to the vehicle running state is a level at which erroneous control can occur, it is detected as a failure .

When the sensor failure processing module 12 detects a failure, the failure information processing unit 13 converts the detected failure information into a table of contents. Specifically, the DTC information about the cause of the failure is listed, and the cause of the failure according to the combination of the DTC items for each controller is analyzed.

In addition, the failure cause table is updated with respect to the combination of DTCs for which the cause of the failure is not known, and the contents are made into a table of contents.

The communication unit 14 connects the electronic devices in the vehicle using the wiring system to the vehicle network. Specifically, the communication unit 14 can use CAN (Controller Area Network) communication.

The sensor module 2 receives the output value of the sensor using the CAN communication, and the signal processing module 11 outputs the control value of the vehicle according to the output value of the sensor.

Further, the failure occurrence cause table generated by the failure information processing unit 13 is transmitted to the sensor unit 2. [ The sensor unit 2 can store in the memory 221 in the control module 22 a table of the cause of the failure that will be described later.

4 to 6 are flowcharts of a method of diagnosing a vehicle according to the present invention.

According to an embodiment of the present invention, a sensor in the sensor unit 2 operates (10). Specifically, the yaw sensor 210, the lateral acceleration sensor 211, and the longitudinal acceleration sensor 212 installed in the vehicle operate.

Thereafter, faults in the sensor can be detected (20). A case where a value measured by the sensor module 21 differs from a value stored in the control module 22 as an example of a specific sensor failure may be included.

If the sensor unit 2 detects a failure in the sensor, the failure information is transmitted to the posture control unit 1 (30). Specifically, the communication unit 222 is used to transmit the failure information to the posture control unit 1. [

The transmitted failure information is indexed in the attitude control unit 1 (40). That is, the posture control unit 1 lists the DTC (Diagnostic Test Code) information about the cause of the failure in the failure information processing unit 13, Analyze the cause of failure according to the combination.

In addition, the failure information processing unit 13 can update the failure cause table with respect to the combination of DTCs for which the cause of the failure can not be known, and can make a table of contents.

Thereafter, the posture control unit 1 transmits the failure information indexed by the failure information processing unit 13 to the sensor unit 2 (50). Specifically, the posture control unit 1 transmits the failure information indexed by the posture control unit 1 through the communication unit 14 to the sensor unit 2, and the sensor unit 2 communicates with the communication unit within the sensor unit 2 222, the sensor unit 2 receives the information.

Finally, the received fault information is stored in the sensor unit 2 (60). That is, the failure information is stored in the memory 221 included in the control module 22, so that the failure information can be easily obtained when the sensor module 21 in the sensor unit 2 is detached from the vehicle.

As shown in Fig. 5, according to another embodiment of the present invention, a sensor in the sensor unit 2 operates (10). Specifically, the yaw sensor 210, the lateral acceleration sensor 211, and the longitudinal acceleration sensor 212 installed in the vehicle operate.

Thereafter, the communication between the sensor unit 2 and the posture control unit 1 is started (S20).

In the case of inconsistency of the transmission / reception data in the communication (S21), it can be regarded as a communication failure between the sensor unit 2 and the posture control unit 1. [ A concrete communication failure may be caused by a problem that when a transmission value and a reception value are different between a rolling count, that is, a message transmission / reception between the communication unit 222 in the sensor unit 2 and the communication unit 14 in the posture control unit 1, And the check value of the data is different.

If a communication error occurs, the failure information is transmitted to the posture control unit 1 (S22). Specifically, the communication unit 222 is used to transmit the failure information to the posture control unit 1. [

The transmitted failure information is indexed in the attitude control unit 1 (40). That is, the posture control unit 1 lists the communication failure information received through the communication unit 14 in the failure information processing unit 13 as a list of DTC (Diagnostic Test Code) information about the cause of the failure, To analyze the cause of the failure.

Then, the fault information processed by the fault information processing unit 13 is transmitted to the sensor unit 2 (50). Specifically, the controller 2 transmits the failure information indicated by the index to the sensor unit 2 via the communication unit 14 in the posture control unit 1, and transmits the information to the sensor unit 2 via the communication unit 222 in the sensor unit 2. [ Lt; / RTI >

Finally, the received fault information is stored in the sensor unit 2 (60). That is, the failure information is stored in the memory 221 included in the control module 22, and the problem can easily be informed when the sensor unit 2 is acquired from the vehicle.

As shown in FIG. 6, according to another embodiment of the present invention, a vehicle equipped with the vehicle diagnostic system 100 according to the present invention starts from a running state (9). A sensor in the sensor unit 2 of the vehicle under operation operates (10). Specifically, the yaw sensor 210, the lateral acceleration sensor 211, and the longitudinal acceleration sensor 212 installed in the vehicle operate.

Thereafter, a control abnormality in the posture control unit 1 is sensed (S100). Specifically, the sensor failure processing module 12 includes detecting when a control error occurs in the signal processing module 11.

When a control abnormality occurs in the signal processing module 11, the failure information processing unit 13 makes the failure information table of contents (40). That is, the posture control unit 1 lists the failure information in the signal processing module 11 in the failure information processing unit 13 as a list of DTC (Diagnostic Test Code) information about the cause of the failure, Analyze the cause of the failure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein; It will be understood that various modifications may be made without departing from the spirit and scope of the invention.

100: Vehicle diagnostic system

Claims

A sensor unit for sensing a posture of the vehicle; And
And an attitude control unit for controlling the attitude of the vehicle based on the detected attitude of the vehicle,
Wherein the posture control section makes a list of the failure information of the sensor unit or the posture control section and stores the listened fault information in the sensor unit.

The method according to claim 1,
Wherein the failure information means at least one of failure of at least one of operation information of the sensor unit, posture control information of the posture control unit, and communication information between the sensor unit and the posture control unit.

3. The method of claim 2,
The sensor unit
A sensor module for measuring a posture of the vehicle; And
And a control module that controls the sensor module and stores the listened fault information.

The method of claim 3,
Wherein the failure of the operation information of the sensor unit or the communication information between the sensor unit and the posture control section is transmitted to the posture control section to be a table of contents.

5. The method of claim 4,
Wherein the communication between the sensor unit and the control unit comprises CAN communication.

Sensing a posture of the vehicle;
Controlling the posture of the vehicle based on the detected posture of the vehicle;
Making a table of contents of the failure information generated in the posture control; And
And storing the listened fault information in the attitude detection sensor.

The method according to claim 6,
Wherein the failure information indicates at least one of an operation failure of the posture detection sensor, a posture control operation failure, and an attitude control communication failure.

8. The method of claim 7,
Wherein the posture control communication failure includes a CAN communication failure at the time of posture control of the vehicle.

A sensor module for measuring a posture of the vehicle;
And a control module for controlling the sensor module,
Wherein the control module stores the listened attitude failure information of the vehicle.

10. The method of claim 9,
Wherein the control module transmits failure information of the sensor module or communication failure information of the sensor module and the vehicle control unit to the vehicle control unit and receives and stores the posture failure information indexed by the vehicle control unit.