CN107272649A - Malfunction remote diagnosis system and method - Google Patents
Malfunction remote diagnosis system and method Download PDFInfo
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- CN107272649A CN107272649A CN201710542704.5A CN201710542704A CN107272649A CN 107272649 A CN107272649 A CN 107272649A CN 201710542704 A CN201710542704 A CN 201710542704A CN 107272649 A CN107272649 A CN 107272649A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0267—Fault communication, e.g. human machine interface [HMI]
- G05B23/027—Alarm generation, e.g. communication protocol; Forms of alarm
Abstract
The present invention provides a kind of malfunction remote diagnosis system, including a remote diagnosis ECU and a remote diagnosis server, and remote diagnosis ECU accesses the CAN of vehicle；The long-range ECU collects the fault message stored on the ECU on vehicle, and collects the real-time dynamic information of vehicle according to user's request, meanwhile, remote diagnosis ECU performs the real-time information interaction between vehicle and remote diagnosis server；ECU on the vehicle refers to other all ECU in addition to the remote diagnosis ECU on vehicle；The remote diagnosis server storage ECU diagnostic data bases, vehicle, vehicle VIN code information, and the diagnosis of the user being collected into request is sent to the remote diagnosis ECU, and the remote diagnosis ECU fault datas passed back are converted into diagnostic result return to user.The present invention enables the long-range real-time diagnosis of fault car, and eliminates influence of the remote diagnosis to the normal operation of vehicle and ensure vehicle driving safety.
Description
【Technical field】
The present invention relates to a kind of malfunction remote diagnosis system and method.
【Background technology】
Existing onboard diagnostic system needs to carry out field failure diagnosis to vehicle with diagnostic equipment, and diagnostic equipment typically has two
Kind, a kind of is hand-held, is an independent equipment belt display screen, and another is a hardware box connection vehicle, software
Above notebook, the software and hardware box on notebook combines as a set of diagnostic equipment.Carried out using diagnostic equipment
Fault diagnosis, it is impossible to which the very first time occurred in failure confirms vehicle trouble, and needs vehicle being moved to maintenance store and can make
Fault diagnosis, breakdown maintenance poor in timeliness and consuming user's maintenance time are carried out with diagnostic equipment.
Publication No. CN105629964A's《Vehicle fault remote real-time diagnosis method》It illustrate only a kind of remote diagnosis
Thinking, and do not provide concrete implementation mode, have essential distinction with claimed technical scheme of the invention, the present invention is explained
State how remote diagnosis system is realized, including system composition, software architecture etc..
Publication No. CN104850113A's《A kind of vehicle remote diagnosis system and method》Elaborate a kind of vehicle remote
Diagnostic system and method, the system include a car-mounted terminal, and the car-mounted terminal includes：Microprocessor, acquisition module, 3G communications
Module and memory module, specifically：Step S100, gathers and is locally stored vehicle diagnosis initial data；Step S200, passes through
The vehicle diagnosis initial data of 3G communication modules remote transmission collection；Step S300, the automobile for receiving and preserving remote transmission is examined
Disconnected initial data；Step S400, accesses vehicle diagnosis initial data to diagnose vehicle failure.The system is by external
Car-mounted terminal realize that including collection, storage, send, its implementation and the present invention have essence different, and remember at the 0028th section
It is loaded with：Acquisition module can be CAN vehicle diagnosis communication module, in order to adapt to the development of automobile product multichannel CAN
Trend, it may be considered that different logical to be adapted on automobile using the CAN vehicle diagnosis communication module of compatible two-way CAN
Interrogate the CAN of baud rate.That is, the initial data of the technical scheme is directly to quote message by CAN to read,
In the presence of the risk of leakage train safety information, and the present invention is to read vehicle-state by UDS diagnosing protocols, is referred to by sending
Order is to ECU read failures code or data flow, and security is higher.
The existing open source literature diagnosed on vehicle fault remote, does not go out the scheme of complete set to solve：How to solve
Certainly vehicle fault remote diagnoses, how to ensure that remote diagnosis is ageing and how to reduce remote diagnosis to the normal operation of vehicle
During influence and ensure vehicle safety.In view of this, applicant proposed a set of brand-new based on UDS agreements
Vehicle trouble security diagnostics system and method.
【The content of the invention】
One of the technical problem to be solved in the present invention, is to provide a kind of malfunction remote diagnosis system, makes disabled vehicle
Can remotely real-time diagnosis, and eliminate influence of the remote diagnosis to the normal operation of vehicle and ensure vehicle driving safety.
The present invention is realized in one of above-mentioned technical problem：
Malfunction remote diagnosis system, including a remote diagnosis ECU and a remote diagnosis server, the remote diagnosis
ECU accesses the CAN of vehicle, and is carried out data transmission by communication with the remote diagnosis server；
The long-range ECU collects the fault message stored on the ECU on vehicle, and according to the reality of user's request collection vehicle
When multidate information, meanwhile, in remote diagnosis process, the remote diagnosis ECU is performed between vehicle and remote diagnosis server
Real-time information interaction；ECU on the vehicle refers to other all ECU in addition to the remote diagnosis ECU on vehicle；
Remote diagnosis server storage ECU diagnostic data bases, vehicle, vehicle VIN code information, and by the use being collected into
The diagnosis request at family is sent to the remote diagnosis ECU, and the remote diagnosis ECU fault datas passed back are converted into examined
Disconnected result returns to user；OEM user and vehicle maintenance shop user log in the remote diagnosis server by client and entered
Row accident analysis and processing.
More preferably, the remote diagnosis ECU leads to including data transmission module, remote diagnostic module, UDS diagnostic modules, CAN
Interrogate module and ECU Hardware drive modules；
The data transmission module realizes remote diagnosis ECU with the data transfer and number between the remote diagnosis server
According to encryption, specifically include：1st, the diagnosis request that the remote server is sent is received and parsed through, is then passed to described
Remote diagnostic module and UDS diagnostic modules；2nd, the remote diagnosis server is back to after fault data is encrypted；
The remote diagnostic module is performed：1st, receive and each ECU acquisitions fault message on vehicle is generated after diagnosis request
Instruction；2nd, the multiframe fault message that each ECU and remote diagnosis ECU are fed back is received and parsed through, fault data is obtained；
The UDS diagnostic modules store UDS diagnosis communication agreements, and when receiving the diagnosis request, by itself
Multiframe fault message is sent to the remote diagnostic module；
The CAN communication module is CAN communication data link layer, is performed：1st, the instruction for obtaining fault message is packaged into
CAN message；2nd, the CAN message comprising fault message of feedback is parsed into many frame informations；
The ECU Hardware drive modules control remote diagnosis ECU hardware, and realize sending and receiving for CAN message, will
CAN message is sent to each ECU, and receives the CAN message of each ECU feedbacks.
More preferably, the remote diagnosis ECU also includes a network management module：When data transmission module receives described examine
During disconnected request, network management module judges the communication state of vehicle, if Current vehicle is in a dormant state, by network management mould
Block sends wake-up instruction, and the Hardware drive module sends CAN wake-up signals to the CAN communication module, wakes up the CAN and leads to
Module is interrogated, if vehicle is in wake-up states, is failure to actuate.
The second technical problem to be solved by the present invention, is to provide a kind of vehicle fault remote diagnostic method.
Vehicle fault remote diagnostic method, a remote diagnosis ECU is accessed the CAN of vehicle, and passes through radio communication
Mode carries out data transmission with a remote diagnosis server；
The long-range ECU collects the fault message stored on the ECU on vehicle, and according to the reality of user's request collection vehicle
When multidate information, meanwhile, in remote diagnosis process, the remote diagnosis ECU is performed between vehicle and remote diagnosis server
Real-time information interaction；ECU on the vehicle refers to other all ECU in addition to the remote diagnosis ECU on vehicle；
Remote diagnosis server storage ECU diagnostic data bases, vehicle, vehicle VIN code information, and by the use being collected into
The diagnosis request at family is sent to the remote diagnosis ECU, and the remote diagnosis ECU fault datas passed back are converted into examined
Disconnected result returns to user；OEM user and vehicle maintenance shop user log in the remote diagnosis server by client and entered
Row accident analysis and processing.
More preferably, the remote diagnosis ECU performs following steps：
Step 0, remote diagnosis server send diagnosis request；
Step 1, receive and parse through the diagnosis request that the remote server sends；
Step 2, using UDS diagnosis communications agreement as standard, receive and each ECU on vehicle is generated after diagnosis request obtain failure
The instruction of information, meanwhile, remote diagnosis ECU feeds back the multiframe fault message of itself；
Step 3, by obtain fault message instruction be packaged into CAN message；.
Step 4, the CAN message by CAN is sent to each ECU；
The CAN message for including fault message that step 5, each ECU of reception are fed back；
Step 6, the CAN message comprising fault message of feedback is parsed into multiframe fault message；
Step 7, the multiframe fault message that each ECU and remote diagnosis ECU are fed back is received and parsed through, obtain number of faults
According to；
Step 8, will the fault data encrypt after be back to the remote diagnosis server；
Step 9, the remote diagnosis server obtain diagnosis knot according to the remote diagnosis ECU fault datas passed back
Really, and user is returned to.
More preferably, the vehicle fault remote diagnostic method also supports arousal function, between the step 1 and step 2
Also include step 11, the step 11 is specially：The communication state of vehicle is judged, if Current vehicle in a dormant state, is sent out
Go out to wake up instruction, wake up the CAN communication module, then perform step 2, if vehicle is in wake-up states, directly perform step
Rapid 2 to 9.
More preferably, in order to ensure vehicle driving safety, the remote diagnosis ECU limits remote diagnosis entry condition, specifically
Ground, the long-range ECU monitors current vehicle speed in real time by CAN, and when receiving diagnosis request, current vehicle speed is less than setting
Threshold value, the long-range ECU starts to perform step 2 to step 9.
More preferably, in the step 2, the instruction of the acquisition fault message of the generation is asked for functional addressing, passes through work(
Can addressing request read vehicle each ECU it is current/historical failure code stored number situation；
In order to reduce CAN network peak load rate, for the ECU of failure number of codes ＞ 0 on vehicle, the remote diagnosis
ECU obtains the failure code one by one, and obtains every setting time of failure code interval one, and the setting time is entered as needed
Row setting.
More preferably, for the failure currently having confirmed that, the remote diagnosis ECU also confirms failure institute according to server request
The target ECU of category electrical load status, including：Sensor voltage, input speed, input switch state, and upload server,
Purpose is to judge whether current failure influences driving safety, if influence, provides roadside assistance and maintenance, if not influenceing, car
Main on-site maintenance.
More preferably, when being diagnosed using vehicle diagnostic device, to ensure the function priority task of vehicle diagnostic device, setting
It is as follows：
Step 100, remote diagnosis ECU itself diagnostic functions support write-in data " RD Mode ", and data are compiled
Number 0xF010, data content：0x0=is opened, and 0x10=is closed；
Step 200, when remote diagnosis ECU F010 are written as 0x10, ECU temporarily ceases Remote Diagnosis System, simultaneously
Monitoring function is opened, when F010 is reset to not have diagnostic data transmission in CAN in 0x0 or 10s, is remotely examined
F010 is reset to 0x0 by disconnected ECU, and recovers Remote Diagnosis System.
The invention has the advantages that：
Malfunction remote diagnosis system of the present invention and method are to be based on vehicle UDS diagnostic systems, are integrated in T-box vehicles
Remote communication module, can effectively save vehicle remote diagnosis system development cost, and fault car, maintenance store, vehicle can be achieved
The shared interaction of factory's fault message, so that effectively reduction maintenance cost and maintenance man-hours, lifts vehicle maintenance efficiency.Meanwhile, this hair
It is bright to substantially reduce remote diagnosis to the influence in vehicle operation and ensure the security that vehicle is travelled.
【Brief description of the drawings】
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the schematic diagram of remote diagnosis system of the present invention.
Fig. 2 is remote diagnosis ECU of the present invention structural representation.
Fig. 3 is remote diagnosis schematic flow sheet of the present invention.
Fig. 4 is that diagnostic equipment of the present invention monitors schematic flow sheet.
【Embodiment】
Refer to shown in Fig. 1 to Fig. 4, embodiments of the invention are described in detail.
Embodiment one：
Emphasis is referring to Fig. 1, malfunction remote diagnosis system, including a remote diagnosis ECU and a remote diagnosis service
Device, the remote diagnosis ECU accesses the CAN of vehicle, and is entered by communication with the remote diagnosis server
Row data transfer；The communication includes 3G/4G/wifi；
The long-range ECU collects the fault message stored on the ECU on vehicle, and according to the reality of user's request collection vehicle
When multidate information, meanwhile, in remote diagnosis process, the remote diagnosis ECU is performed between vehicle and remote diagnosis server
Real-time information interaction；ECU on the vehicle refers to other all ECU in addition to the remote diagnosis ECU on vehicle；
Remote diagnosis server storage ECU diagnostic data bases, vehicle, vehicle VIN code information, and by the use being collected into
The diagnosis request at family is sent to the remote diagnosis ECU, and the remote diagnosis ECU fault datas passed back are converted into examined
Disconnected result returns to user；OEM user and vehicle maintenance shop user log in the remote diagnosis server by client and entered
Row accident analysis and processing.
Specifically, the remote diagnosis ECU leads to including data transmission module, remote diagnostic module, UDS diagnostic modules, CAN
Interrogate module and ECU Hardware drive modules；
Refer to Fig. 2 and Fig. 3, the data transmission module realize remote diagnosis ECU with the remote diagnosis server it
Between data transfer and data encryption, specifically include：1st, the diagnosis request that the remote server is sent is received and parsed through, so
After be passed to the remote diagnostic module and UDS diagnostic modules；2nd, it is back to and described remotely examines after fault data is encrypted
Disconnected server；
The remote diagnostic module is performed：1st, receive and each ECU acquisitions fault message on vehicle is generated after diagnosis request
Instruction；2nd, the multiframe fault message that each ECU and remote diagnosis ECU are fed back is received and parsed through, fault data is obtained；
The UDS diagnostic modules store UDS diagnosis communication agreements, and when receiving the diagnosis request, by itself
Multiframe fault message is sent to the remote diagnostic module；
The CAN communication module is CAN communication data link layer, is performed：1st, the instruction for obtaining fault message is packaged into
CAN message；2nd, the CAN message comprising fault message of feedback is parsed into many frame informations；
The ECU Hardware drive modules control remote diagnosis ECU hardware, and realize sending and receiving for CAN message, will
CAN message is sent to each ECU, and receives the CAN message of each ECU feedbacks.
It should be noted that：Carried out during UDS diagnostic module data transfers based on multiframe, such as one ECU's of reading
DTC, for remote diagnostic module be in order to：1. CAN communication module is told the signal to be sent；2. CAN communication mould is parsed
Block is transmitted through a plurality of message come.
And CAN communication module is primarily to control hardware driving realizes message transmission/reception (CAN message most 8
Byte data), such as read DTC (DTC：Diagnostic Trouble Code diagnostic trouble code) when,
Data transmission module：Remote diagnostic module is told to read complete vehicle fault；
Remote diagnostic module：CAN communication module is told, the AF AA AA AA AA of message 04 19 02 are sent
CAN communication module：Bottom layer driving is controlled to send CAN data frames, data are 04 19 02 AF AA AA AA AA
The passback of CAN communication module is following hexadecimal data：(every is all 8 bytes)
xx yy 59 02 AF DTC1(3byte)
21 DTC1 state DTC2 DTC2 states ...
22...
23...
24...DTCn DTCn states
Remote diagnostic module is parsed after receiving, and is parsed：DTC1 states 1, DTC2 states 2 ..., DTCn states n
More excellent embodiment is that the remote diagnosis system can also wake up the vehicle of resting state, specifically, described
Remote diagnosis ECU also includes a network management module：When data transmission module receives the diagnosis request, network management mould
Block judges the communication state of vehicle, if Current vehicle is in a dormant state, and wake-up instruction is sent by network management module, described
Hardware drive module sends CAN wake-up signals to the CAN communication module, wakes up the CAN communication module, is called out if vehicle is in
The state of waking up, then be failure to actuate.
Remote diagnosis system of the present invention is based on ripe UDS diagnosing protocols, and in addition to remote diagnosis ECU, remaining ECU is not required to
Special diagnosing protocol and conditions for diagnostics correspondence remote diagnosis are set, at utmost to reduce vehicle development cost.
The diagnostic process of remote diagnosis system of the present invention, refers to the embodiment of the present invention two.
Embodiment two,
Vehicle fault remote diagnostic method, a remote diagnosis ECU is accessed the CAN of vehicle, and passes through radio communication
Mode carries out data transmission with a remote diagnosis server；
The long-range ECU collects the fault message stored on the ECU on vehicle, and according to the reality of user's request collection vehicle
When multidate information, meanwhile, in remote diagnosis process, the remote diagnosis ECU is performed between vehicle and remote diagnosis server
Real-time information interaction；ECU on the vehicle refers to other all ECU in addition to the remote diagnosis ECU on vehicle；
Remote diagnosis server storage ECU diagnostic data bases, vehicle, vehicle VIN code information, and by the use being collected into
The diagnosis request at family is sent to the remote diagnosis ECU, and the remote diagnosis ECU fault datas passed back are converted into examined
Disconnected result returns to user；OEM user and vehicle maintenance shop user log in the remote diagnosis server by client and entered
Row accident analysis and processing.
Emphasis is referring to Fig. 3, the remote diagnosis ECU performs following steps：
Step 0, remote diagnosis server send diagnosis request；
Step 1, the diagnosis request that the remote server sends is received and parsed through,
Step 2, using UDS diagnosing protocols as standard, receive and each ECU on vehicle is generated after diagnosis request obtain fault message
Instruction；The instruction of the acquisition fault message of the generation is generally functional addressing request, and car is read by functional addressing request
Each ECU is current/historical failure code stored number situation；Remote diagnosis ECU feeds back the multiframe fault message of itself simultaneously；
Step 3, by obtain fault message instruction be packaged into CAN message；.
Step 4, the CAN message by CAN is sent to each ECU；
The CAN message for including fault message that step 5, each ECU of reception are fed back；
Step 6, the CAN message comprising fault message of feedback is parsed into multiframe fault message；
Step 7, the multiframe fault message for receiving and parsing through each ECU and remote diagnosis ECU feedbacks, obtain fault data；
Step 8, will the fault data encrypt after be back to the remote diagnosis server；
Step 9, the remote diagnosis server obtain diagnosis knot according to the remote diagnosis ECU fault datas passed back
Really, and user is returned to.
More preferably embodiment is that diagnosis process also includes also supporting arousal function, between the step 1 and step 2
Also include step 11, the step 11 is specially：The communication state of vehicle is judged, if Current vehicle in a dormant state, is sent out
Go out to wake up instruction, wake up the CAN communication module, then perform step 2, if vehicle is in wake-up states, directly perform step
Rapid 2 to 9.
In order to ensure vehicle driving safety, the remote diagnosis ECU limits remote diagnosis entry condition, specifically, described
Long-range ECU monitors current vehicle speed in real time by CAN, and when receiving diagnosis request, current vehicle speed is less than the threshold value of setting,
The long-range ECU starts to perform step 2 to step 9, for example, can see that threshold value is set as speed≤10km/h.
There is following influence because remote diagnosis is used in everyday on vehicle：1. diagnosis process adds the total of CAN network
Linear load rate, makes vehicle normal signal interact ageing reduction；2. ECU controller work loads, shadow are added during diagnosing
Vehicle function itself is rung, therefore, in order to reduce CAN network peak load rate, for the ECU of failure number of codes ＞ 0 on vehicle, institute
State remote diagnosis ECU and obtain the failure code one by one, and obtain every setting time of failure code interval one, the setting time
Set as needed, for example, it can be set to for per minor tick 500ms.
For the failure currently having confirmed that, the remote diagnosis ECU can also be confirmed belonging to failure according to server request
Target ECU electrical load status, including：Sensor voltage, input speed, input switch state, and upload server, mesh
Be to judge whether current failure influences driving safety, if influence, provide roadside assistance and maintenance, if not influenceing, car owner
On-site maintenance.
After vehicle increase remote diagnosis system, if carried out during being diagnosed using vehicle diagnostic device to vehicle simultaneously
Remote diagnosis, will influence the function of two kinds of diagnostic modes, to ensure the function priority task of vehicle diagnostic device, set as follows：
Step 100, remote diagnosis ECU itself diagnostic functions support write-in data " RD Mode ", and data are compiled
Number 0xF010, data content：0x0=is opened, and 0x10=is closed；
Step 200, when remote diagnosis ECU F010 are written as 0x10, ECU temporarily ceases Remote Diagnosis System, simultaneously
Monitoring function is opened, when F010 is reset in 0x0 or 10s do not have diagnostic data (to believe comprising failure in CAN
The CAN message of breath) transmission when, F010 is reset to 0x0 by remote diagnosis ECU, and recovers Remote Diagnosis System.
Malfunction remote diagnosis system of the present invention and method are to be based on vehicle UDS diagnostic systems, are integrated in T-box vehicles
Remote communication module, can effectively save vehicle remote diagnosis system development cost, and fault car, maintenance store, vehicle can be achieved
The shared interaction of factory's fault message, so that effectively reduction maintenance cost and maintenance man-hours, lifts vehicle maintenance efficiency.Meanwhile, this hair
It is bright to substantially reduce remote diagnosis to the influence in vehicle operation and ensure the security that vehicle is travelled.
Although the foregoing describing the embodiment of the present invention, those familiar with the art should manage
Solution, the specific embodiment described by us is merely exemplary, rather than for the restriction to the scope of the present invention, is familiar with this
The equivalent modification and change that the technical staff in field is made in the spirit according to the present invention, should all cover the present invention's
In scope of the claimed protection.
Claims (10)
1. malfunction remote diagnosis system, it is characterised in that：Including a remote diagnosis ECU and a remote diagnosis server, institute
The CAN that remote diagnosis ECU accesses vehicle is stated, and data are carried out by communication and the remote diagnosis server
Transmission；
The long-range ECU collects the fault message stored on the ECU on vehicle, and collects the dynamic in real time of vehicle according to user's request
State information, meanwhile, in remote diagnosis process, the remote diagnosis ECU performs the reality between vehicle and remote diagnosis server
When information exchange；ECU on the vehicle refers to other all ECU in addition to the remote diagnosis ECU on vehicle；
The remote diagnosis server storage ECU diagnostic data bases, vehicle, vehicle VIN code information, and by the user's being collected into
Diagnosis request is sent to the remote diagnosis ECU, and the remote diagnosis ECU fault datas passed back are converted into diagnosis knot
Fruit returns to user；OEM user and vehicle maintenance shop user log in the remote diagnosis server by client and carry out event
Barrier analysis and processing.
2. malfunction remote diagnosis system as claimed in claim 1, it is characterised in that：The remote diagnosis ECU includes number
According to transport module, remote diagnostic module, UDS diagnostic modules, CAN communication module and ECU Hardware drive modules；
The data transmission module realizes that remote diagnosis ECU adds with the data transfer and data between the remote diagnosis server
It is close, specifically include：1st, the diagnosis request that the remote server is sent is received and parsed through, is then passed to described long-range
Diagnostic module and UDS diagnostic modules；2nd, the remote diagnosis server is back to after fault data is encrypted；
The remote diagnostic module is performed：1st, receive and the instruction that each ECU on vehicle obtains fault message is generated after diagnosis request；
2nd, the multiframe fault message that each ECU and remote diagnosis ECU are fed back is received and parsed through, fault data is obtained；
The UDS diagnostic modules store UDS diagnosis communication agreements, and when receiving the diagnosis request, by the multiframe of itself
Fault message is sent to the remote diagnostic module；
The CAN communication module is CAN communication data link layer, is performed：1st, the instruction for obtaining fault message is packaged into CAN reports
Text；2nd, the CAN message comprising fault message of feedback is parsed into many frame informations；
The ECU Hardware drive modules control remote diagnosis ECU hardware, and realize sending and receiving for CAN message, i.e., by CAN
Message is sent to each ECU, and receives the CAN message of each ECU feedbacks.
3. malfunction remote diagnosis system as claimed in claim 2, it is characterised in that：The remote diagnosis ECU also includes
One network management module：When data transmission module receives the diagnosis request, network management module judges the communication of vehicle
State, if Current vehicle is in a dormant state, wake-up instruction is sent by network management module, the Hardware drive module is sent
CAN wake-up signals give the CAN communication module, wake up the CAN communication module, if vehicle is in wake-up states, are failure to actuate.
4. vehicle fault remote diagnostic method, it is characterised in that：One remote diagnosis ECU is accessed to the CAN of vehicle, and passed through
Communication carries out data transmission with a remote diagnosis server；
The long-range ECU collects the fault message stored on the ECU on vehicle, and collects the dynamic in real time of vehicle according to user's request
State information, meanwhile, in remote diagnosis process, the remote diagnosis ECU performs the reality between vehicle and remote diagnosis server
When information exchange；ECU on the vehicle refers to other all ECU in addition to the remote diagnosis ECU on vehicle；
The remote diagnosis server storage ECU diagnostic data bases, vehicle, vehicle VIN code information, and by the user's being collected into
Diagnosis request is sent to the remote diagnosis ECU, and the remote diagnosis ECU fault datas passed back are converted into diagnosis knot
Fruit returns to user；OEM user and vehicle maintenance shop user log in the remote diagnosis server by client and carry out event
Barrier analysis and processing.
5. vehicle fault remote diagnostic method as claimed in claim 4, it is characterised in that：The remote diagnosis ECU perform with
Lower step：
Step 0, remote diagnosis server send diagnosis request；
Step 1, receive and parse through the diagnosis request that the remote server sends；
Step 2, using UDS diagnosis communications agreement as standard, receive and each ECU on vehicle is generated after diagnosis request obtain fault message
Instruction, meanwhile, remote diagnosis ECU feeds back the multiframe fault message of itself；
Step 3, by obtain fault message instruction be packaged into CAN message；.
Step 4, the CAN message by CAN is sent to each ECU；
The CAN message for including fault message that step 5, each ECU of reception are fed back；
Step 6, the CAN message comprising fault message of feedback is parsed into multiframe fault message；
Step 7, the multiframe fault message that each ECU and remote diagnosis ECU are fed back is received and parsed through, obtain fault data；
Step 8, will the fault data encrypt after be back to the remote diagnosis server；
Step 9, the remote diagnosis server obtain diagnostic result according to the remote diagnosis ECU fault datas passed back, and
Return to user.
6. vehicle fault remote diagnostic method as claimed in claim 5, it is characterised in that：Arousal function is also supported, described
Also include step 11 between step 1 and step 2, the step 11 is specially：The communication state of vehicle is judged, if at Current vehicle
In resting state, then wake-up instruction is sent, the CAN communication module is waken up, step 2 is then performed, if vehicle, which is in, wakes up shape
State, then directly perform step 2 to 9.
7. vehicle fault remote diagnostic method as claimed in claim 5, it is characterised in that：In order to ensure vehicle driving safety,
The remote diagnosis ECU limits remote diagnosis entry condition, and specifically, the long-range ECU is monitored currently in real time by CAN
Speed, when receiving diagnosis request, current vehicle speed is less than the threshold value of setting, and the long-range ECU starts to perform step 2 to step
9。
8. vehicle fault remote diagnostic method as claimed in claim 5, it is characterised in that：In the step 2, the generation
The instruction of fault message is obtained to ask for functional addressing, by functional addressing request read vehicle each ECU it is current/historical failure yard
Stored number situation；
In order to reduce CAN network peak load rate, for the ECU of failure number of codes ＞ 0 on vehicle, the remote diagnosis ECU by
Bar obtains the failure code, and obtains every setting time of failure code interval one, and the setting time is set as needed
It is fixed.
9. vehicle fault remote diagnostic method as claimed in claim 4, it is characterised in that：For the failure currently having confirmed that,
The remote diagnosis ECU also asks to confirm the electrical load status of the target ECU belonging to failure according to server, including：Sensing
Device voltage, input speed, input switch state, and upload server, it is therefore an objective to judge whether current failure influences driving safety,
If influence, roadside assistance and maintenance, if not influenceing, car owner's on-site maintenance are provided.
10. vehicle fault remote diagnostic method as claimed in claim 5, it is characterised in that：Carried out when using vehicle diagnostic device
During diagnosis, to ensure the function priority task of vehicle diagnostic device, set as follows：
Step 100, remote diagnosis ECU itself diagnostic functions support write-in data " RD Mode ", data number
0xF010, data content：0x0=is opened, and 0x10=is closed；
Step 200, when remote diagnosis ECU F010 are written as 0x10, ECU temporarily ceases Remote Diagnosis System, simultaneously open
Monitoring function, when F010 is reset to not have diagnostic data transmission in CAN in 0x0 or 10s, remote diagnosis
F010 is reset to 0x0 by ECU, and recovers Remote Diagnosis System.
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Cited By (56)
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Application publication date: 20171020 |