CN202067143U - Fault diagnosis instrument for automobile electrical control unit - Google Patents
Fault diagnosis instrument for automobile electrical control unit Download PDFInfo
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- CN202067143U CN202067143U CN2010206888752U CN201020688875U CN202067143U CN 202067143 U CN202067143 U CN 202067143U CN 2010206888752 U CN2010206888752 U CN 2010206888752U CN 201020688875 U CN201020688875 U CN 201020688875U CN 202067143 U CN202067143 U CN 202067143U
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Abstract
The utility model relates to a fault diagnosis instrument for an automobile electrical control unit. The fault diagnosis instrument comprises a PC machine and a control system, a USB (Universal Serial Bus) CAN (Central Area Network) converter and a simulation controller. The PC machine and the control system comprise a high-speed processing PC machine, a monitoring and man-machine interaction module, an engine simulation model memory, a normal database memory and a fault diagnosis and display module. Compared with the prior art, by adopting the fault diagnosis instrument, the check procedures on faults of the automobile electric control system are simplified, the fault check range is smaller, the fault diagnosis rate is improved, and the maintenance load and capital occupancy of stock parts caused by diagnosis on replacing parts are effectively reduced, thereby greatly lowering the maintenance cost.
Description
Technical field
The utility model relates to a kind of automotive diagnostic unit, especially relates to a kind of automobile electronic control unit failure diagnostic apparatus.
Background technology
The fault diagnosis of automobile electric control system generally is by special-purpose diagnostics interface on the automobile, reads the diagnostic trouble code of exporting from automobile electronic control unit (ECU) with demoder, and diagnostic trouble code is made an explanation, and shows the fault content.This diagnostic mode is a kind of diagnostic mode of passive read failure, can not diagnose internal fault and the dynamic fault of ECU.The automobile ECU diagnostic trouble code can have the following aspects to produce: 1, the fault of sensor own, i.e. sensor cisco unity malfunction; 2, signal transfer medium fault, i.e. automotive wire bundle short circuit and open fault; 3, ECU internal hardware fault; 4, ECU in house software fault.
In fact, the failure rate of ECU own is not little: the ECU hardware fault comprises the short circuit of its leading foot or open circuit etc.; The ECU software fault, for example control program and parameter are lost the mistake control that causes and consequent diagnostic trouble code etc., causing automobile sign indicating number usually to occur not having has fault, a yard non-fault is arranged, and problem such as diagnostic trouble code and fault be not corresponding, make the auto repair personnel directly judge vehicle failure parts and reason according to the diagnostic trouble code that demoder is read.Generally adopt in the industry at present " method of substitution ", that is,, adopt Qualified Parts, begin to carry out to substitute one by one from peripheral (comprising sensor, actuator and relevant wire harness) at the automobile electric control system fault coverage of diagnostic trouble code indication.Fault disappears if certain qualified parts substitutes the back, and then these parts are the source of trouble; If it is all invalid that all substitute, just be inferred as the ECU fault at last.Because automobile sensor and actuator installation site are very narrow and small and compact, it is very complicated that wire harness is laid and moved towards, and do not postpone to repair because of there being substitutions of elements to order goods sometimes, and late accessory may not be the fault basic reason.Obviously, this maintenance mode not only spends a large amount of manpowers and time, also must the stock comprises a large amount of Qualified Parts of ECU.Motor vehicle repair type that enterprise repairs is many more, and required stock's spare part is also just many more, and the circulating capital amount that takies is also just big more.
The utility model content
The purpose of this utility model is exactly to provide a kind of investigation flow process of not only simplifying the automobile electric control system fault greatly for the defective that overcomes above-mentioned prior art existence, dwindle the malfunction elimination scope, but also improved the fault diagnosis rate, and effectively reduce maintenance load and the stock's parts fund occupancy volume that the substitutions of elements diagnosis is brought, thereby reduce a kind of automobile electronic control unit failure diagnostic apparatus of maintenance cost greatly.
The purpose of this utility model can be achieved through the following technical solutions: a kind of automobile electronic control unit failure diagnostic apparatus is characterized in that this failure diagnostic apparatus comprises PC and control system, USB CAN converter, emulation controller.Described PC and control system comprise high speed processing PC, monitoring and human-computer interaction module, engine realistic model memory, standard database memory, fault diagnosis and display module; Described high speed processing PC is connected with monitoring and human-computer interaction module, engine realistic model memory, standard database memory, fault diagnosis and display module by bus; Described PC and control system are connected with emulation controller by USB CAN converter.
Described emulation controller comprises at least two-way programmable switch amount or frequency quantity output circuit, multichannel programmable D/A output circuit, multichannel programmable I/O output circuit, multichannel I/O input circuit, multi-channel A/D input circuit, high speed interface, and described emulation controller is connected with ECU (Electrical Control Unit) to be checked by high speed interface.
Described fault diagnosis and display module comprise random access memory, internal data memory, comparer.
Compared with prior art, the utlity model has following advantage:
1, utilization the utility model device, realize that automobile electronic control unit ECU diagnoses from car, not only simplify the investigation flow process of automobile electric control system fault greatly, dwindle the malfunction elimination scope, but also improved the fault diagnosis rate, and effectively reduce maintenance load and stock's parts fund occupancy volume that the substitutions of elements diagnosis is brought.
2, the utility model adopts the Digital Simulation engine mockup to substitute actual engine and running environment thereof.Online when engine realistic model and real car ECU (Electrical Control Unit) (being called for short target ECU), when carrying out the real-time simulation dry run, this system can be regarded as a "black box".Adopt a known standard ECU as target ECU,, set up standard ECU input-output database setting the system banner that carries out standard ECU input-output parameter under the operating mode.
3, the utility model is by satisfying its operate as normal desired signal in the input of ECU input end, detect each output response signal of ECU, and be reference with each the output response of standard ECU duty, by comparing standard and fault some characteristic index of ECU output signal to be checked one by one, judge that ECU to be checked output is whether in the permissible variation scope of setting, if all outputs are all being set in the deviation separately, represent that then ECU to be checked is normal; Otherwise, as exceed this scope, represent that promptly there is fault in ECU to be checked.And then judge automobile electrically-controlled ECU nature of trouble, and to part ECU software fault, can be under the help of former automobile factory, by reading in control program again and parameter is repaired; To part ECU hardware fault (getting loose etc.), use suitable instrument to be repaired, thereby reduce maintenance cost greatly as leading foot.
4, by dynamically change some input signal of ECU at the utility model device interface, show its relevant output in real time, according to the control strategy of this automatically controlled ECU, can accurately diagnose out the character of ECU fault.
Description of drawings
Fig. 1 is the utility model method of work process flow diagram;
Fig. 2 is a structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
As shown in Figure 1, this method may further comprise the steps:
Step 1) tester sets operating mode by one in the human-computer interaction interface choice criteria database.The foundation of standard database may further comprise the steps: 11) the high speed processing PC calls standard database and reads in function, gather the output of known standard target ECU (Electrical Control Unit), and the input of this operating mode and the output of standard target ECU (Electrical Control Unit) carried out system banner, set up corresponding standard ECU (Electrical Control Unit) input-output; 12) the standard output of the known standard target ECU (Electrical Control Unit) of 3～5 same models of sampling under the described input of step 11) obtains the permissible variation that standard is exported; 13) change setting operating mode in the step 11), promptly change the input of known standard target ECU (Electrical Control Unit), repeating step 11) and step 12), set up the standard database that input-output and permissible variation are associated under the different operating modes thus.
Step 2) the high speed processing PC sends to ECU (Electrical Control Unit) to be checked with the pairing standard input information of a certain operating mode by emulation controller, simultaneously the pairing standard output of this operating mode response message is sent into the random memory in fault diagnosis and the display module;
Step 3) standard input information drives ECU (Electrical Control Unit) operation to be checked, and the output response message of ECU (Electrical Control Unit) to be checked is transported in the random memory of fault diagnosis and display module after the emulation controller collection;
Standard is exported response message for step 4) fault diagnosis and display module and ECU (Electrical Control Unit) to be checked output response message is compared, and judge that ECU (Electrical Control Unit) to be checked output response is whether in the permissible variation scope of setting, show in display then that if the judgment is Yes ECU (Electrical Control Unit) to be checked is normal, otherwise show that there is fault in ECU (Electrical Control Unit) to be checked, and carry out step 5);
Step 5) tester manually changes some input information;
Monitoring of step 6) high speed processing PC and human-computer interaction module send to emulation controller with the operating mode input information, emulation controller sends sensor die analog signal, gauge tap signal and the engine phase signal of changing through D/A at this moment by high speed interface to ECU (Electrical Control Unit) to be checked, ECU (Electrical Control Unit) output drive control signal to be checked, this drive control signal is returned the high speed processing PC behind emulation controller;
Step 7) high speed processing PC calls the engine mockup corresponding with ECU (Electrical Control Unit) to be checked, to its input drive control signal, the engine mockup simulation run draws simulation rotating speed and other control parameters, these signals are flowed to ECU (Electrical Control Unit) to be checked again by the emulation controller high speed interface, the drive control signal of ECU (Electrical Control Unit) output to be checked feeds back to engine mockup, repeating step 7 again) up to each stable output signal of ECU (Electrical Control Unit) to be checked; Step 8) tester changes some input information such as throttle opening, engine load, water temperature, oil temperature, air-conditioning switch, Transmission gear, the change of the corresponding output of real-time monitored display screen, according to the control strategy of ECU (Electrical Control Unit) to be checked, diagnose out the nature of trouble of ECU (Electrical Control Unit) to be checked.
As shown in Figure 2, a kind of automobile electronic control unit failure diagnostic apparatus, this device comprise PC and control system 1, USBCAN converter 2, emulation controller 3, ECU (Electrical Control Unit) to be checked 4.PC and control system 1 comprise high speed processing PC 11, monitoring and human-computer interaction module 12, engine realistic model memory 13, standard database memory 14, fault diagnosis and display module 15.High speed processing PC 11 is connected with monitoring and human-computer interaction module 12, engine realistic model memory 13, standard database memory 14, fault diagnosis and display module 15 by bus.PC and control system 1 are connected with emulation controller 3 by USB CAN converter 2.Emulation controller 3 is connected with ECU (Electrical Control Unit) ECU 4 to be checked.Emulation controller 3 comprises two-way programmable switch amount output circuit, multichannel programmable D/A output circuit, multichannel programmable I/O output circuit, multichannel I/O input circuit, multi-channel A/D input circuit at least, and high speed interface.Fault diagnosis and display module 15 comprise random access memory, internal data memory, comparer.
A kind of automobile electronic control unit failure diagnostic apparatus, substitute actual engine and running environment thereof with the Digital Simulation engine mockup, after itself and real car ECU (Electrical Control Unit) (being called for short target ECU) are online, the real-time simulation dry run, output by detecting ECU to be checked and with standard ECU output relatively, realize fault diagnosis to ECU to be checked.The utility model device is provided with " dry run ", three kinds of mode of operations of " setting up database " " diagnosis ":
When " dry run ", PC monitoring and human-computer interaction module at first tester on the device interface is set the operating mode input (as, throttle opening, engine load, water temperature, oil temperature, air-conditioning switch, Transmission gear etc.) send to emulation controller; Emulation controller sends sensor die analog signal, gauge tap signal and the engine phase signal of changing through D/A (CMPS Camshaft Position Sensor signal and crankshaft rotational speed sensor signal) at this moment by high speed interface to target ECU, drive control signal such as the oil spout of simultaneously continuous receiving target ECU output, igniting, and send it back the high speed processing PC; The high speed processing PC calls engine mockup, draw its simulation rotating speed and other control parameters to its input drive control signal rear engine model emulation analog computation, give target ECU with these signals again by the emulation controller data-interface, the output of ECU feeds back to the engine mockup of high speed processing PC again ... after some circulations, each stable output signal of target ECU.By real-time display window, can clearly see main waveform such as the oil spout of exporting in the target ECU dry run, igniting.When change certain input signal at human-computer interaction interface, the change of the corresponding output of real-time monitored display screen according to the control strategy of target ECU, can accurately be inferred the nature of trouble of ECU.
When being operated in " setting up database " state, the high speed processing PC calls standard database and reads in function, gathers the output of known standard target ECU, and system banner is carried out in the input of this operating mode and the output of target ECU, sets up standard ECU input-output.Consider that may there be certain output bias in same model standard ECU, the standard output under 3～5 the identical inputs of intact ECU of sampling obtains the permissible variation that standard is exported.Change and set operating mode, promptly change the input of ECU, can obtain corresponding with it ECU standard output, set up standard ECU input-output database thus.
When being operated in " diagnosis " state, carry out the fault ECU diagnosis of (being called for short ECU to be checked) this moment, and the high speed processing PC calls fault diagnosis and display module and standard database memory read out function.The tester is by certain sets operating mode in the human-computer interaction interface choice criteria database, so the high speed processing PC sends to ECU to be checked with series of standards input under this operating mode by emulation controller, simultaneously the standard output of correspondence is sent into the random access memory in fault diagnosis and the display module, fault diagnosis and display module are sent in the ECU output to be checked that the high speed processing PC will receive, carry out the comparison of ECU output to be checked and standard ECU output, if difference all in the deviation range of regulation, thinks that ECU to be checked is normal; Otherwise, then think ECU fault to be checked.Diagnostic result enters the internal data memory and shows the fault content.
As shown in Figure 2, the utility model device substitutes actual engine and running environment thereof with the engine mockup real-time simulation in the high speed processing PC, and the real car ECU (Electrical Control Unit) that need detect (being called for short target ECU) links to each other with the high speed processing PC by the high speed interface of analogue system.The formation of the communication interface USB CAN of information transmission between PC wherein and control system, emulation controller, PC and control system and emulation controller etc. and act on as follows:
1, PC and control system:
The high speed processing PC is by the operation of total line traffic control monitoring and human-computer interaction module, engine realistic model memory, standard database memory, fault diagnosis and display module etc.
● monitoring and human-computer interaction module: provide friendly man-machine interactive interface, display-object ECU state output in real time and diagnostic result; According to the utility model device duty conversion command, realize calling that engine realistic model memory carries out numerical simulation, sets up ECU standard input-output database (call database and read in function), failure diagnostic process control (database is read and output data comparison in real time, event memory and relevant demonstration etc.).
● the engine realistic model: it is the virtual engine in the whole simulation system.Adopt the average engine mockup accurately dynamically to predict the necessary variable of some engines, select for use Matlab/Simulink software to carry out modeling, be converted into through Real Time workshop and can carry out the C language file, can accelerate simulation calculation.
● the standard database memory
Support to read in real time-the read-write data memory of high capacity of read operation.
● fault diagnosis and display module
Form by random access memory and internal data memory, comparer etc.Random access memory is mainly used in some standard output signals of temporarily depositing from the standard ECU database; Internal data memory then is used for depositing comparative result information, and shows in the window of Man Machine Interface.
2, emulation controller
Emulation controller is as the connecting interface between target ECU and PC and the control system, should be able to be according to the setting working condition requirement of high speed processing PC transmission, simulation produces a series of input signals and sends to target ECU, drive ECU work, simultaneously, the continuous receiving target ECU of emulation controller output signal is sent the high speed processing PC back to.Consider target ECU input-output semaphore request, being attached thereto the analogue system hardware interface that connects should have:
● at least 2 road programmable switch amounts or frequency quantity output circuit
According to the tach signal that the high speed processing PC is sent, produce corresponding CMPS Camshaft Position Sensor and crankshaft rotational speed sensor signal and send into target ECU respective input mouth.
● multichannel programmable D/A output circuit
Each sensor signal (as: throttle position, coolant water temperature, intake air temperature, MAP etc.) according to the high speed processing PC is sent produces corresponding analog voltage signal and sends into target ECU respective input mouth.
● multichannel programmable I/O output circuit
I/O digital signal (as: Keying spoon switch, idling contact switch, neutral position switch, air-conditioning request switch, brake switch etc.) according to the high speed processing PC is sent produces corresponding high-low level switch controlling signal, and sends into target ECU respective input mouth.
● multichannel I/O input circuit
The high-low level signal of the driving relay switch of collection target ECU output becomes digital signal and sends the high speed processing PC back to after the I/O interface conversion.
● multi-channel A/D input circuit
Gather the analog signals of ECU output, send the high speed processing PC back to through the A/D conversion.
● gather the current signal of the solenoid valve classes such as driving fuel injector of ECU output, after the shaping filter processing, send the high speed processing PC back to.
● high speed interface is supported the high-speed transfer of input/output signal between target ECU and emulation controller.
3, CAN communication interface---USB CAN converter
Adopt USB CAN software driver, send the instruction of high speed processing PC to emulation controller in real time, receive data message simultaneously, realize the communication between PC and control system and analogue system from emulation controller.
Claims (3)
1. automobile electronic control unit failure diagnostic apparatus, it is characterized in that, this failure diagnostic apparatus comprises PC and control system, USB CAN converter, emulation controller, described PC and control system comprise high speed processing PC, monitoring and human-computer interaction module, engine realistic model memory, standard database memory, fault diagnosis and display module, and described high speed processing PC is connected with monitoring and human-computer interaction module, engine realistic model memory, standard database memory, fault diagnosis and display module by bus; Described PC and control system are connected with emulation controller by USB CAN converter.
2. a kind of automobile electronic control unit failure diagnostic apparatus according to claim 1, it is characterized in that, described emulation controller comprises at least two-way programmable switch amount or frequency quantity output circuit, multichannel programmable D/A output circuit, multichannel programmable I/O output circuit, multichannel I/O input circuit, multi-channel A/D input circuit, high speed interface, and described emulation controller is connected with ECU (Electrical Control Unit) to be checked by high speed interface.
3. a kind of automobile electronic control unit failure diagnostic apparatus according to claim 1 is characterized in that described fault diagnosis and display module comprise random access memory, internal data memory, comparer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206888752U CN202067143U (en) | 2010-12-24 | 2010-12-24 | Fault diagnosis instrument for automobile electrical control unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206888752U CN202067143U (en) | 2010-12-24 | 2010-12-24 | Fault diagnosis instrument for automobile electrical control unit |
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| CN202067143U true CN202067143U (en) | 2011-12-07 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620389A (en) * | 2012-04-26 | 2012-08-01 | 江苏阿尔特空调实业有限责任公司 | Intelligent management and control system for failure of automotive air conditioning |
| CN102681538A (en) * | 2012-05-31 | 2012-09-19 | 杭州速玛科技有限公司 | Test system and test method for ECU oil injection and ignition control |
| CN103455022A (en) * | 2012-06-01 | 2013-12-18 | 北汽福田汽车股份有限公司 | Method and device for diagnosing vehicle-mounted electronic control devices |
| CN105450451A (en) * | 2015-12-01 | 2016-03-30 | 上海第二工业大学 | Network-based fault diagnosis simulation system and method thereof |
| CN105549574A (en) * | 2015-12-12 | 2016-05-04 | 贵州凯星液力传动机械有限公司 | Control system detection device and detection method thereof |
| CN105946747A (en) * | 2016-05-25 | 2016-09-21 | 北京车和家信息技术有限责任公司 | Control method in vehicle and vehicle main board |
| CN106438986A (en) * | 2016-08-31 | 2017-02-22 | 中车大连机车研究所有限公司 | Traction control system of hydraulic transmission case |
| CN107644563A (en) * | 2017-04-28 | 2018-01-30 | 天津职业技术师范大学 | Automotive electronics combined training platform based on graphic programming |
| CN108803558A (en) * | 2017-04-28 | 2018-11-13 | 通用电气公司 | The vehicles check system |
| CN111915026A (en) * | 2019-06-10 | 2020-11-10 | 中车大同电力机车有限公司 | Fault processing method and device, electronic equipment and storage medium |
| US10865726B2 (en) | 2018-02-04 | 2020-12-15 | Ehsanollah Zadpour | Fault diagnosis of electronic control unit (ECU) |
| CN113946145A (en) * | 2020-07-17 | 2022-01-18 | 北京车和家信息技术有限公司 | Detection method and device for vehicle control unit |
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2010
- 2010-12-24 CN CN2010206888752U patent/CN202067143U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102620389A (en) * | 2012-04-26 | 2012-08-01 | 江苏阿尔特空调实业有限责任公司 | Intelligent management and control system for failure of automotive air conditioning |
| CN102681538A (en) * | 2012-05-31 | 2012-09-19 | 杭州速玛科技有限公司 | Test system and test method for ECU oil injection and ignition control |
| CN103455022A (en) * | 2012-06-01 | 2013-12-18 | 北汽福田汽车股份有限公司 | Method and device for diagnosing vehicle-mounted electronic control devices |
| CN103455022B (en) * | 2012-06-01 | 2015-12-02 | 北汽福田汽车股份有限公司 | A kind of diagnostic method of controlled vehicle-mounted electrical device and device |
| CN105450451B (en) * | 2015-12-01 | 2018-10-30 | 上海第二工业大学 | A kind of network-based Fault Diagnosis Simulation system and method |
| CN105450451A (en) * | 2015-12-01 | 2016-03-30 | 上海第二工业大学 | Network-based fault diagnosis simulation system and method thereof |
| CN105549574A (en) * | 2015-12-12 | 2016-05-04 | 贵州凯星液力传动机械有限公司 | Control system detection device and detection method thereof |
| CN105946747B (en) * | 2016-05-25 | 2018-12-28 | 北京车和家信息技术有限公司 | Control method and vehicle mainboard in vehicle |
| CN105946747A (en) * | 2016-05-25 | 2016-09-21 | 北京车和家信息技术有限责任公司 | Control method in vehicle and vehicle main board |
| CN106438986B (en) * | 2016-08-31 | 2018-06-26 | 中车大连机车研究所有限公司 | Hydraulic transmission gear box pull-in control system |
| CN106438986A (en) * | 2016-08-31 | 2017-02-22 | 中车大连机车研究所有限公司 | Traction control system of hydraulic transmission case |
| CN107644563A (en) * | 2017-04-28 | 2018-01-30 | 天津职业技术师范大学 | Automotive electronics combined training platform based on graphic programming |
| CN108803558A (en) * | 2017-04-28 | 2018-11-13 | 通用电气公司 | The vehicles check system |
| CN108803558B (en) * | 2017-04-28 | 2023-10-20 | 西屋气动刹车技术公司 | vehicle inspection system |
| US10865726B2 (en) | 2018-02-04 | 2020-12-15 | Ehsanollah Zadpour | Fault diagnosis of electronic control unit (ECU) |
| CN111915026A (en) * | 2019-06-10 | 2020-11-10 | 中车大同电力机车有限公司 | Fault processing method and device, electronic equipment and storage medium |
| CN113946145A (en) * | 2020-07-17 | 2022-01-18 | 北京车和家信息技术有限公司 | Detection method and device for vehicle control unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20141224 |
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| EXPY | Termination of patent right or utility model |