CN101055228A - K line based electric-control motor fault diagnosis system - Google Patents
K line based electric-control motor fault diagnosis system Download PDFInfo
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- CN101055228A CN101055228A CN 200710041458 CN200710041458A CN101055228A CN 101055228 A CN101055228 A CN 101055228A CN 200710041458 CN200710041458 CN 200710041458 CN 200710041458 A CN200710041458 A CN 200710041458A CN 101055228 A CN101055228 A CN 101055228A
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Abstract
An intelligent fault diagnosis instrument for electric control engine of telecom technical field comprises a KWP communication module for realizing the communication between tester and ECU; a fault code process module for reading, clearing and storing fault code in ECU, transmitting the read fault code to the display module; an engine operating parameter processing module for collecting and storing the operating parameter of engine and transmitting the collected engine operating parameter to the display module; a calibration data file writing module for writing the given calibration data file to ECU; an interface display module for transmitting request command to the fault code reading sub-module, fault code preservation sub-module, operating parameter selecting sub-module, operating parameter preservation sub-module and calibration data file decoding sub-module, and displaying simultaneously fault code and engine operating parameter. The invention is capable of reading, clearing fault code in ECU, preserving the read fault code, real-time collecting operating parameter of engine and writing online into the calibration data file.
Description
Technical field
What the present invention relates to is the system in a kind of telecommunication technology field, specifically is a kind of electric-control motor fault diagnosis system based on the K line.
Background technology
Modern electronic controlled diesel has been introduced OBD (onboard diagnostic system), utilizes ECU (electronic control unit) that each parts of engine electric-controlled system are carried out continuous detecting and diagnosis, and identification and record trouble (comprising intermittent defect) therefore, claim self-diagnosable system again automatically.The functions such as diagnostic trouble code among the ECU are read, remove in the failure diagnostic apparatus realization, are equivalent to the terminal device of self-diagnosable system, have played the effect of man-machine interaction.
Communication between failure diagnostic apparatus and the ECU need be followed certain standard.What used in the diagnostic system is the ISO9141 communication standard in the past, and it is a kind of diagnostic criteria based on serial ports, satisfies the requirement of OBD-II.At present, the communication standard of ISO14230 as diagnostic system adopted in many auto producers commercial city, and this standard satisfies the requirement of OBD-II and OBD-III.ISO9141 and ISO14230 are technical comparatively ripe diagnostic criteria.Along with CAN (CONTROLLER AREA NETWORK, controller local area network) widespread use of bus, European car manufacturer has brought into use a kind of diagnostic system communication standard ISO15765 based on the CAN bus, it satisfies the system requirements of E-OBD, and ISO15765 might become new international diagnostic system communication standard.This failure diagnostic apparatus is followed the ISO14230 standard, and system is based on the Kline bus.
Find through literature search prior art, application number is that 99222050.5 Chinese patent proposes a kind of Fault of Diesel Fuel System diagnostic equipment, but it can only judge the diesel fuel system running status, function is limited, and hardware circuit has used microcontroller and LCD liquid crystal display, the circuit complexity, the cost height is not suitable for producing and promotes.The patent of application number 00101363.7 has proposed a kind of remote connecting device for trouble shooter of automobile, this invention has just realized by telephone line automobile fault diagnostic apparatus and detected automobile being coupled together a device that detects at a distance, has not realized a failure diagnostic apparatus truly.
Lot of domestic and international company has also developed the application system that is specifically designed to the engine electric-controlled system fault diagnosis, the diagnostic equipment of the Diaqmonitor diagnostic system of the outer diagnostic equipment OASIS of the car of Ford, Toyota, Consult, doctor and the Delphi of Nissan etc. is born in succession, these systemic-functions are comparatively complete, but cost an arm and a leg, professional technique requires high, and the standard disunity, thereby its operation and maintenance also is restricted, and is unsuitable for China's actual conditions.The producers such as king, electric eye eyeball that repair of homemade engine diagnosis instrument producer, though the failure diagnostic apparatus of these manufacturer production has certain price advantage, but function is not very complete, and diagnostic equipment equipment is heavier, the traditional liquid crystal display pattern of general employing, the interface is not too friendly, and operation is not easily, brings great inconvenience to attendant's service of going out; And diagnostic equipment is all realized the cost height with the form of hardware.
Summary of the invention
The objective of the invention is to overcome the deficiency in the existing system, a kind of electric-control motor fault diagnosis system based on the K line is provided, achieved powerful, friendly interface, easy to operate and portable fault diagnosis system.The present invention can read, remove the diagnostic trouble code among the ECU, preserves the diagnostic trouble code that has read, and gathers engine operating parameter in real time, the online nominal data file that writes, and cost reduces relatively.
The present invention is achieved by the following technical solutions, the present invention is based on the KWP2000 agreement, comprising: KWP communication module, diagnostic trouble code processing module, engine operating parameter processing module, nominal data file programming module and interface display module.The KWP communication module mainly is the regulation that satisfies in KWP2000 (the Keyword Protocol 2000) agreement Physical layer and data link layer, realize the communication between tester (service host) and the ECU, reach ECU and diagnostic trouble code processing module, engine operating parameter processing module and demarcate the purpose of carrying out data transmission between the file programming module.The diagnostic trouble code processing module realizes the diagnostic trouble code among the ECU is read, removes and preserves according to user's operation requests, and the diagnostic trouble code that reads is delivered to interface display module.The engine operating parameter processing module also is according to user's operation requests realization the operational factor of engine to be gathered in real time and preserved, and the engine operating parameter that collects is delivered to interface display module simultaneously.Nominal data file programming module also is according to user's operation requests realization ECU to be arrived in given nominal data file programming.Interface display module is chosen submodule, operational factor preservation submodule and nominal data file decoding submodule to diagnostic trouble code reading submodule, diagnostic trouble code preservation submodule, operational factor and is sent the demonstration request command, shows diagnostic trouble code and engine operating parameter then.
Described KWP communication module comprises KWP built-up circuit hardware submodule and KWP2000 protocol data link layer coding and decoding realization submodule.KWP built-up circuit hardware submodule is realized the level conversion of tester to communication between the ECU, regulation according to KWP2000 agreement Physical layer, K line interface level is the positive logic level, and the RS232 interface of tester end is the negative logic level, and this module becomes the positive logic level conversion negative logic level of RS232.Data link layer has been stipulated the information relevant with data message such as format information, station address information, length information, command information, data message and check information of message.The data link layer coding and decoding realizes that submodule then is the data that will the send form codings with message, further is sent to ECU by KWP built-up circuit hardware submodule with data; Or decode to receiving message information, command information and data message are extracted, these information are delivered to diagnostic trouble code processing module, engine operating parameter processing module, nominal data file programming module and are handled.
Described diagnostic trouble code processing module comprises that diagnostic trouble code reading submodule, diagnostic trouble code are removed submodule and diagnostic trouble code is preserved submodule.The diagnostic trouble code reading submodule is passed through the data link layer coding and decoding and is realized that submodule to the order that ECU sends the read failure sign indicating number, receives the diagnostic trouble code information from ECU simultaneously, and gives the demonstration of diagnostic trouble code display sub-module with the information after the diagnostic trouble code decoding.Diagnostic trouble code is removed submodule and is realized that by the data link layer coding and decoding submodule sends the order of removing diagnostic trouble code to ECU, receives the diagnostic trouble code clear confirmation information from ECU simultaneously; If ECU does not have diagnostic trouble code after removing, then send cue to the user; If also have diagnostic trouble code after removing, then activate the diagnostic trouble code reading submodule, the read failure sign indicating number.The failure message that diagnostic trouble code preservation submodule will be shown in the diagnostic trouble code display sub-module files, and carries out the consequent malfunction analysis for the attendant.
Described engine operating parameter processing module comprises that operational factor is chosen submodule and operational factor reading submodule, operational factor are preserved submodule.Operational factor is chosen the operational factor that submodule is chosen needs monitoring from system, after operational factor is chosen and is finished, the operational factor reading submodule realizes that by the data link layer coding and decoding submodule sends the order of reading operational factor, receive the real time execution supplemental characteristic of ECU feedback simultaneously, deliver to the engine operating parameter display sub-module and show.Operational factor is preserved submodule when gathering engine operating parameter in real time, and the data of gathering are filed, and carries out follow-up engine operating state analysis for the attendant.
Described nominal data file programming module comprises that nominal data file decoding submodule and nominal data send submodule.Nominal data file decoding submodule, extracts wherein program/data message, and its corresponding address information is noted the S19 file decoding according to S record format.After decoding finished, nominal data sent submodule and realizes that by the data link layer coding and decoding submodule circulation sends data in the S19 file to ECU, sends up to all data to finish.After the affirmation signal that the Data Receiving of receiving ECU finishes, nominal data sends submodule and is responsible for the ECU that resets, and successfully is stored in the middle of the reservoir of ECU to guarantee the data of having transmitted.
Described interface display module comprises diagnostic trouble code display sub-module, engine operating parameter display sub-module and action button submodule.Interface display module adopts patterned developing instrument LabVIEW (virtual instrument) to finish, and has realized the user interface of friendly interface.Total system adopts the mode of AM/BAM to move, and interface display module is in front stage operation, and other module is carried out in the backstage, belongs to background module.The diagnostic trouble code display sub-module will receive the diagnostic trouble code reading submodule and receive next data presentation in the interface; The engine operating parameter display sub-module receives the data presentation of coming with the operational factor reading submodule and comes out.The action button submodule receives the operation requirement from the user, comprises the read failure sign indicating number, removes diagnostic trouble code, preserves diagnostic trouble code, reads engine real time execution parameter, preserves engine real time execution parameter, programming nominal data file etc.After these operations that receive the operator required, background module was handled accordingly according to different user's requests.
System of the present invention has realized the electric-control motor fault diagnosis instrument based on the K line, on the basis of realizing the failure diagnostic apparatus proper function, has increased the function that file is demarcated in programming.Because diagnostic equipment does not adopt complicated microcontroller and LCD to realize, for manufacturing enterprise, has reduced production cost.For the user, diagnostic equipment is simple and easy to usefulness on the one hand, be easy to carry, and friendly interface, easy to operate, can use in the place that computer is arranged, computer belongs to office appliance simultaneously, can be because of being diagnostic equipment configuration computer increase expense specially; On the other hand, the often same ECU of engine producer can join a lot of different engine models, for the service station, because former diagnostic equipment can not programming be demarcated file, so all need to be equipped with an ECU for different types, adopt after the diagnostic equipment with programming demarcation file function, only need select different nominal data files at different types, and do not need to be equipped with a plurality of ECU, reduced expense equally.
Description of drawings
Fig. 1 is a system chart of the present invention
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Present embodiment is based on that the KWP2000 agreement proposes, and the KWP2000 agreement is the standard for serial communication agreement that is applied to automobile controller fault diagnosis and demarcation, monitoring system that ISO (International Standards Organization) is formulated.The KWP2000 agreement defines Physical layer, data link layer and application layer respectively.Physical layer has provided definition to logic signal levels; Data link layer and application layer define the mutual appointed information between message structure, service application person and the ISP.All instructions are sent by main frame in the KWP2000 protocol application layer regulation service, only are responsible for carrying out corresponding operating and answering operation information according to different instructions as user's ECU.ECU can not send instruction as main frame, and can only communicate with main frame, can not intercom mutually between ECU and the ECU.
The demarcation file of present embodiment system is the S19 form, claims S record format file again.S record format is the sexadecimal destination file format of motorola inc.It is represented program and data with printable ASCII fromat, allow to check file destination with the Software tool of standard.S record format also comprises the checking function of makeing mistakes, and can guarantee the correctness that data transmit.The S record is actually the set of the character string of being made up of five parts.It comprises record type, record length, storage address, program/data and verification and.
As shown in Figure 1, present embodiment comprises: KWP communication module, diagnostic trouble code processing module, engine operating parameter processing module, nominal data file programming module and interface display module.The KWP communication module satisfies in the KWP2000 agreement regulation to Physical layer and data link layer, be responsible for the communication of tester and ECU, the KWP communication module sends submodule with diagnostic trouble code reading submodule, engine operating parameter reading submodule and nominal data file and links to each other; Interface display module is responsible for showing that from the data of ECU reception and reception operator's operation consciousness interface display module is chosen submodule with diagnostic trouble code reading submodule, diagnostic trouble code removing submodule, diagnostic trouble code preservation submodule, operational factor, operational factor is preserved submodule and linked to each other with nominal data file decoding submodule.
1, KWP communication module, the KWP communication module is responsible for the communication of tester and ECU machine.This module is made up of KWP built-up circuit hardware submodule, two submodules of KWP2000 protocol data link layer coding and decoding realization submodule.
A) KWP built-up circuit hardware submodule, KWP built-up circuit hardware submodule is a hardware module, realizes that with KWP2000 protocol data link layer coding and decoding submodule and ECU link to each other.This module realizes the transmission of physical signalling, the negative logic level conversion of pc machine RS232 is become TTL positive logic level, and this module does not adopt integrated chip, realizes circuit by discrete component fully.
B) KWP2000 protocol data link layer coding and decoding is realized submodule, this module is removed submodule, operational factor reading submodule with diagnostic trouble code reading submodule, diagnostic trouble code, nominal data sends submodule and KWP built-up circuit hardware submodule links to each other, and is responsible for the digital coding or the decoding that will send or receive.Message data frame for sending according to the regulation of KWP2000 protocol massages, encodes the data to the message that ECU can receive; For the message data frame that receives it is decoded, extract command information and data message.
2, diagnostic trouble code processing module, the diagnostic trouble code processing module is according to operator's the diagnostic trouble code information of request from ECU read failure sign indicating number information or removing ECU, according to operator's request the diagnostic trouble code that reads is preserved simultaneously, operator's request is imported from interface display module.This module is preserved submodule and is formed by diagnostic trouble code reading submodule, diagnostic trouble code removing submodule, diagnostic trouble code.
A) diagnostic trouble code reading submodule, the diagnostic trouble code reading submodule receives the request from the read failure sign indicating number of the action button submodule in the interface display module, realize that by KWP2000 protocol data link layer coding and decoding submodule sends the order of read failure sign indicating number then, and the diagnostic trouble code that reads is returned.After reading diagnostic trouble code, diagnostic trouble code is sent to the diagnostic trouble code display sub-module show; Under the situation of user's request, the diagnostic trouble code that receives is preserved submodule by diagnostic trouble code preserve simultaneously.
B) diagnostic trouble code is removed submodule, diagnostic trouble code is removed the request of submodule reception from read failure sign indicating number in the action button submodule in the interface display module, realize that by KWP2000 protocol data link layer coding and decoding submodule sends the order of removing diagnostic trouble code, removes the diagnostic trouble code among the ECU then.
C) diagnostic trouble code is preserved submodule, and diagnostic trouble code is preserved submodule and received from the request of preserving diagnostic trouble code in the action button submodule in the interface display module, and directly the diagnostic trouble code that the diagnostic trouble code reading submodule is read is filed.
3, engine operating parameter processing module, the status monitoring variable information that the engine operating parameter processing module is chosen according to the operator, realize the order of submodule transmit status monitoring by KWP2000 protocol data link layer coding and decoding, and the state parameter information that reads returned, send to the engine operating parameter display sub-module and show; Under the situation of user's request, in status monitoring, carry out the real-time file of operational factor simultaneously.This module is chosen submodule, operational factor reading submodule, operational factor reading submodule by operational factor and is formed.
A) operational factor is chosen submodule, and it mainly is the request that receives the user that operational factor is chosen submodule, and the user chooses the trip information that needs monitoring by this module, and the trip information that will choose of this module is passed to the operational factor reading submodule then.Because the KWP2000 message length is limited within 260 bytes, simultaneously in order to guarantee the real-time of operational factor monitoring, operational factor is chosen the operational factor variable that submodule chooses and is no more than 20.
B) operational factor reading submodule, the trip information that the operational factor reading submodule is monitored as required, realize that by KWP2000 protocol data link layer coding and decoding submodule sends the order of reading state parameter information, and the state parameter information that reads is sent to the demonstration of engine operating parameter display sub-module.Under the situation of user's request, in status monitoring, status information is preserved submodule by operational factor and preserve simultaneously.
C) operational factor is preserved submodule, and operational factor is preserved the request of submodule according to the user, will file in real time by the operational factor status information that the operational factor reading submodule monitors.
4, nominal data file programming module, nominal data file programming module realizes function to ECU programming nominal data file according to operator's request.This module sends submodule by nominal data file decoding submodule and nominal data and forms.
A) nominal data file decoding submodule, nominal data file decoding submodule are decoded the nominal data file that chooses according to operator's request according to the S19 file layout, and the good data of will decoding send to nominal data transmission submodule.
B) nominal data sends submodule, nominal data sends submodule and receives the good data of decoding from nominal data file decoding submodule, realize that by KWP2000 protocol data link layer coding and decoding the order and the nominal data of submodule transmission programming demarcation file send to ECU then, and the ECU that after programming finishes, resets.
5, interface display module, interface display module are used to show that diagnostic trouble code, trip information etc. reach reception user's operation requests etc.This module is made up of diagnostic trouble code display sub-module, engine operating parameter display sub-module and action button submodule.
A) diagnostic trouble code display sub-module, diagnostic trouble code display sub-module and diagnostic trouble code reading submodule are used to show the diagnostic trouble code that reads.
B) engine operating parameter display sub-module, the engine operating parameter display sub-module links to each other with the operational factor reading submodule, is used for showing in real time the engine operating parameter state.
C) action button submodule, the action button submodule is removed submodule, diagnostic trouble code with diagnostic trouble code reading submodule, diagnostic trouble code respectively and is preserved that submodule, operational factor are chosen submodule, operational factor is preserved submodule and linked to each other with nominal data file decoding submodule, sends read failure sign indicating numbers, removes diagnostic trouble code, preserves diagnostic trouble code, chooses the operational factor that engine need monitor and the request of programming demarcation file to these modules respectively.
Adopt above-mentioned technology, can realize powerful, friendly interface, easy to operate and portable fault diagnosis system, can read, remove the diagnostic trouble code among the ECU, preserve the diagnostic trouble code that has read, gather engine operating parameter, the online nominal data file that writes in real time.
Claims (10)
1, a kind of electric-control motor fault diagnosis system based on the K line is characterized in that comprising five modules: KWP communication module, diagnostic trouble code processing module, engine operating parameter processing module, nominal data file programming module and interface display module; Total system realizes based on the KWP2000 agreement, wherein: described KWP communication module satisfies in the KWP2000 agreement regulation to Physical layer and data link layer, realize the communication between service host and the electronic control unit, reach between electronic control unit and diagnostic trouble code processing module, engine operating parameter processing module and the demarcation file programming module and carry out data transmission; Described diagnostic trouble code processing modules implement reads, removes and preserve the diagnostic trouble code in the electronic control unit, and the diagnostic trouble code that reads is delivered to interface display module; Described engine operating parameter processing modules implement realizes gathering and preserving to the operational factor of engine, and the engine operating parameter that collects is delivered to interface display module simultaneously; Described nominal data file programming module realizes given nominal data file programming to electronic control unit; Described interface display module is chosen submodule, operational factor preservation submodule and nominal data file decoding submodule to diagnostic trouble code reading submodule, diagnostic trouble code preservation submodule, operational factor and is sent request command, shows diagnostic trouble code and engine operating parameter simultaneously.
2, the electric-control motor fault diagnosis system based on the K line as claimed in claim 1 is characterized in that, described KWP communication module comprises KWP built-up circuit hardware submodule and KWP2000 protocol data link layer coding and decoding realization submodule; KWP built-up circuit hardware submodule is realized the level conversion of service host to communication between the electronic control unit, the data link layer coding and decoding realizes that submodule then is the data that will the send form codings with message, further is sent to electronic control unit by KWP built-up circuit hardware submodule with data; Or decode to receiving message information, command information and data message are extracted, these information are delivered to diagnostic trouble code processing module, engine operating parameter processing module, nominal data file programming module and are handled.
3, the electric-control motor fault diagnosis system based on the K line as claimed in claim 2, it is characterized in that, regulation according to KWP2000 agreement Physical layer, K line interface level is the positive logic level, and the RS232 interface of service host end is the negative logic level, and KWP built-up circuit hardware submodule becomes the positive logic level conversion negative logic level of RS232.
4, the electric-control motor fault diagnosis system based on the K line as claimed in claim 1 is characterized in that, described diagnostic trouble code processing module comprises that diagnostic trouble code reading submodule, diagnostic trouble code are removed submodule and diagnostic trouble code is preserved submodule; The diagnostic trouble code reading submodule realizes that by the data link layer coding and decoding submodule sends the order of read failure sign indicating number to electronic control unit, receive diagnostic trouble code information simultaneously, and give the demonstration of diagnostic trouble code display sub-module the information after the diagnostic trouble code decoding from electronic control unit; Diagnostic trouble code is removed submodule and is realized that by the data link layer coding and decoding submodule sends the order of removing diagnostic trouble code to electronic control unit, receives the diagnostic trouble code clear confirmation information from electronic control unit simultaneously; The failure message that diagnostic trouble code preservation submodule will be shown in the diagnostic trouble code display sub-module files, and carries out the consequent malfunction analysis for the attendant.
5, the electric-control motor fault diagnosis system based on the K line as claimed in claim 4 is characterized in that, described diagnostic trouble code is removed submodule, and electronic control unit does not have diagnostic trouble code after diagnostic trouble code is removed, and then sends cue to the user; If also have diagnostic trouble code after diagnostic trouble code is removed, then activate the diagnostic trouble code reading submodule, the read failure sign indicating number.
6, the electric-control motor fault diagnosis system based on the K line as claimed in claim 1 is characterized in that, described engine operating parameter processing module comprises that operational factor chooses submodule, operational factor reading submodule, operational factor and preserve submodule; Operational factor is chosen the operational factor that submodule is chosen needs monitoring from system, after operational factor is chosen and is finished, the operational factor reading submodule realizes that by the data link layer coding and decoding submodule sends the order of reading operational factor to electronic control unit, receive the real time execution supplemental characteristic of electronic control unit feedback simultaneously, deliver to the engine operating parameter display sub-module and show; Operational factor is preserved submodule when gathering engine operating parameter in real time, and the data of gathering are filed, and carries out follow-up engine operating state analysis for the attendant.
7, the electric-control motor fault diagnosis system based on the K line as claimed in claim 6 is characterized in that, described operational factor is chosen submodule, and its operational factor of choosing is less than or equal to 20.
8, the electric-control motor fault diagnosis system based on the K line as claimed in claim 1 is characterized in that, described nominal data file programming module comprises that nominal data file decoding submodule and nominal data send submodule; Nominal data file decoding submodule, extracts wherein program/data message, and its corresponding address information is noted the S19 file decoding according to S record format; After decoding finished, nominal data sent submodule and realizes that by the data link layer coding and decoding submodule circulation sends data in the S19 file to electronic control unit, sends up to all data to finish; After the affirmation signal that the Data Receiving of receiving electronic control unit finishes, nominal data sends submodule and is responsible for the electronic control unit that resets, and successfully is stored in the middle of the reservoir of electronic control unit to guarantee the data of having transmitted.
9, the electric-control motor fault diagnosis system based on the K line as claimed in claim 1 is characterized in that, described interface display module comprises diagnostic trouble code display sub-module, engine operating parameter display sub-module and action button submodule; Total system adopts the mode of AM/BAM to move, interface display module is in front stage operation, module except that interface display module is carried out in the backstage, belong to background module, the diagnostic trouble code display sub-module will receive the diagnostic trouble code reading submodule and receive next data presentation in the interface, the engine operating parameter display sub-module receives the data presentation of coming with the operational factor reading submodule and comes out, the action button submodule receives the operation requirement from the user, comprise the read failure sign indicating number, remove diagnostic trouble code, preserve diagnostic trouble code, read engine real time execution parameter, preserve engine real time execution parameter, programming nominal data file, after these operations that receive the operator require, background module is handled accordingly according to different user's requests.
10, the electric-control motor fault diagnosis system based on the K line as claimed in claim 9 is characterized in that, described interface display module is finished with patterned developing instrument Virtual instrument LabVIEW, has realized the user interface of friendly interface.
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| WO2009086717A1 (en) * | 2008-01-05 | 2009-07-16 | Shenzhen Launch Software Development Co., Ltd. | Device and method for reading and registering-analyzing data of automobile electric controlling system |
| CN101858827A (en) * | 2010-05-25 | 2010-10-13 | 中国第一汽车集团公司无锡柴油机厂 | Method for temporarily interrupting fault diagnosis of diesel engine |
| CN101441476B (en) * | 2008-12-19 | 2011-05-11 | 奇瑞汽车股份有限公司 | Software implementing method of data link layer based on KWP2000 |
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| WO2009086717A1 (en) * | 2008-01-05 | 2009-07-16 | Shenzhen Launch Software Development Co., Ltd. | Device and method for reading and registering-analyzing data of automobile electric controlling system |
| CN101626230B (en) * | 2008-07-08 | 2012-08-08 | 上海海能汽车电子有限公司 | Kline-RS232 circuit with function of preventing reverse connection |
| CN101441476B (en) * | 2008-12-19 | 2011-05-11 | 奇瑞汽车股份有限公司 | Software implementing method of data link layer based on KWP2000 |
| CN101782777B (en) * | 2009-12-07 | 2012-07-04 | 力帆实业(集团)股份有限公司 | Off-line detection system |
| CN101739012B (en) * | 2009-12-14 | 2011-08-10 | 北汽福田汽车股份有限公司 | Vehicle electronic control unit and control method and upper computer thereof |
| CN101865773B (en) * | 2010-02-01 | 2012-05-02 | 东风朝阳柴油机有限责任公司 | Simple whole machine diagnostic unit of electric control diesel engine |
| CN101858827B (en) * | 2010-05-25 | 2012-11-28 | 中国第一汽车集团公司 | Method for temporarily interrupting fault diagnosis of diesel engine |
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