CN101739022A - Performance test system and method for control unit of engine - Google Patents
Performance test system and method for control unit of engine Download PDFInfo
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- CN101739022A CN101739022A CN200810227200A CN200810227200A CN101739022A CN 101739022 A CN101739022 A CN 101739022A CN 200810227200 A CN200810227200 A CN 200810227200A CN 200810227200 A CN200810227200 A CN 200810227200A CN 101739022 A CN101739022 A CN 101739022A
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Abstract
The invention discloses a performance test system for a control unit of an engine, which comprises a computer device, a single-chip microcomputer and a test signal generating circuit, wherein the computer device sends a preset test command for the control unit of the engine to the single-chip microcomputer; the single-chip microcomputer converts the preset test command to corresponding test data for the test signal generating circuit; and the test signal generating circuit produces a test signal which corresponds to the test data and outputs into the control unit of the engine; wherein the control unit of the engine carries out collection of the test signal and/or treatment on the test signal for producing feedback data, and the collected test signal and/or the feedback data is transmitted to the computer device through the single-chip microcomputer for carrying out performance test of the control unit of the engine. The invention further provides a performance test method for the control unit of the engine. The invention has the advantages of high test efficiency and high accuracy.
Description
Technical field
The present invention relates to control unit of engine, relate in particular to a kind of test macro and method of control unit of engine.
Background technology
Control unit of engine (ECU) is a kind of electronic installation of controlling combustion engine various piece running, it not only is used to control the parameters such as injection flow, the duration of ignition of each engine cycle, and also the various faults that occur according to system are carried out respective handling and sent corresponding steering order.ECU is the core component in vehicle electric field, and whether reliable normal operation to the entire internal combustion engine system plays a key effect its performance.Therefore, ECU needed to carry out strict relevant performance parameters test before dispatching from the factory, and whether qualified with the ECU product of detection design, whether function is normal.
But enterprise is mainly manual test to the test of ECU at present, not only waste of manpower, and cost is higher, and accuracy is relatively poor, and testing efficiency is not high.
Summary of the invention
Purpose of the present invention is intended to one of solve the aforementioned problems in the prior at least.
For this reason, embodiments of the invention propose a kind of Performance Test System and method with control unit of engine of high testing efficiency and accuracy.
According to an aspect of the present invention, the Performance Test System that control unit of engine is provided of the embodiment of the invention, comprise that computer installation, single-chip microcomputer and test signal produce circuit, described computer installation sends and is used for the default test instruction of control unit of engine to described single-chip microcomputer; Described single-chip microcomputer is converted to described default test instruction and is used for the corresponding test data that described test signal produces circuit; Described test signal produces the test signal of circuit generation and described test data correspondence and outputs in the control unit of engine; Wherein control unit of engine carries out described test signal collection and/or handles described test signal producing feedback data, and by described single-chip microcomputer transmit described collecting test signal and/or described feedback data in the described computer installation to carry out the test performance of control unit of engine.
According to a further aspect in the invention, the embodiment of the invention also provides a kind of performance test methods of control unit of engine, may further comprise the steps: be used for the default test instruction of control unit of engine to single-chip microcomputer from the computer installation transmission; By described single-chip microcomputer described default test instruction is converted to corresponding test data; Provide test signal according to described test data, and output to collection and/or the processing of carrying out described test signal in the control unit of engine; By described single-chip microcomputer with the test signal of control unit of engine collection and/or handle the feedback data that described test signal produces and be sent in the described computer installation; Compare analysis with data, to carry out the test performance of control unit of engine with default test instruction correspondence in described test signal and/or described feedback data and the described computer installation.
The present invention tests the corresponding function of control unit of engine automatically by the various test signals of computing machine, single-chip microcomputer and generation, testing efficiency height not only, and have higher measuring accuracy.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the block diagram of the control unit of engine Performance Test System of the embodiment of the invention;
Fig. 2 is the control unit of engine performance test methods flow chart of steps of the embodiment of the invention;
Fig. 3 is the control unit of engine load performance testing procedure process flow diagram of the embodiment of the invention; With
Fig. 4 is the control unit of engine faulty behavior testing procedure process flow diagram of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
At first, please refer to Fig. 1, this figure is the block diagram of control unit of engine (ECU) Performance Test System of the embodiment of the invention.
As shown in the figure, this test macro comprises that computer installation 12, single-chip microcomputer 16 and test signal produce circuit 18.Wherein, computer installation 12 and single-chip microcomputer 16 are set up data transmission and exchange between them by first communicating circuit 14.For example, first communicating circuit 14 can adopt the serial communication interface, or the USB/CAN data converting circuit etc.Computer installation 12 sends dependent instruction to single-chip microcomputer 16 by first communicating circuit 14 with predefined test item, and the default test instruction that single-chip microcomputer 16 will receive is again exported to test signal and produced circuit 18.Before corresponding test instruction being transferred to test signal generation circuit 18, single-chip microcomputer 16 at first is converted to the corresponding test data that test signal generation circuit 18 can be discerned with the test instruction of correspondence, for example exports corresponding simulating signal.
Test signal produces circuit 18 according to test data, and the test signal that generation is corresponding also outputs in the tested control unit of engine 20.20 of tested control unit of engine carry out signals collecting according to the test signals that receive, and/or test signal is handled the generation feedback data.Tested control unit of engine 20 is sent to the test signal of gathering and/or the feedback data of output in the computer installation 12 by single-chip microcomputer 16 again, with the performance test of the corresponding test item that carries out control unit of engine.
Wherein, can be connected with second communicating circuit 22 between tested control unit of engine 20 and the single-chip microcomputer 16, being used to connect the communication between tested control unit of engine 20 and the single-chip microcomputer 16, thereby realize the transmission of data between the two.In one embodiment, second communicating circuit 22 can be the control module Local Area Network (Controller Area Network, CAN).The CAN network transmission system is combined the data bus and the miscellaneous part of single-chip microcomputer, thereby realizes the high-speed transfer of data.
Computer installation 12 obtains the feedback data of tested control unit of engine 20 outputs from single-chip microcomputer 16, and data are put in order, record, analyze, for example with the output data of tested control unit of engine 20, the test item that sends according to correspondence with computer installation 12 instructs the data that configured in advance to compare analysis, and provides judgement and reason.Acquired signal for tested control unit of engine 20 outputs, computer installation 12 is inconsistent as if comparing acquired signal and producing the circuit 18 actual signals that produce according to pre-configured control test signal, and the signals collecting function that then detects tested control unit of engine 20 has problems.Test signal deal with data for tested control unit of engine 20 outputs, computer installation 12 then detects the signal processing function existing problems of tested control unit of engine 20 if relatively this deal with data and the pre-configured qualified control unit of engine of the computer installation deal with data that should produce is inconsistent.Certainly, under the situation of the signals collecting performance inconsistency lattice of tested control unit of engine 20, the test signal deal with data and the predetermined process data of its output are obviously inconsistent.
In one embodiment, test signal generation circuit 18 can comprise sensor signal analogue unit (not shown) and/or switch element (not shown).The sensor signal analogue unit is used for producing the sensor die analog signal according to the default test instruction at sensor, voltage signal etc. for example, and the sensor die analog signal is input in the tested control unit of engine 20.Gather and/or handle by 20 pairs of these sensor die analog signals of tested control unit of engine, and image data and/or processing fed back in the computer installation 12 compare analysis with initialize data.For example, the sensor signal analogue unit is the voltage of 5V according to the sensor signal that test instruction produces, and there are certain deviation in received signal and 5V voltage that tested control unit of engine 20 is gathered, and this deviation exceeds predetermined error range, and then the acquisition function of the tested control unit of engine 20 of computer installation 12 detections is defective; Otherwise acquisition function is qualified.Similarly,, for example join oil mass, rotating speed etc., can detect the signal Processing performance of tested control unit of engine 20 according to the deal with data of tested control unit of engine 20 according to output sensor signal output.In one embodiment, Sensor Signal Simulation Circuit 18 for example mainly is made up of D/A (D/A) conversion chip and driving output.
Similarly, produce circuit 18 in test signal and comprise under the situation of switch element, switch element produces the open and close signal of for example high and low level form according to the corresponding preset test instruction.By the open and close signal is outputed on the tested control unit of engine 20, thereby can detect its collection and/or handle the performance of open and close signal.
In an embodiment, switch element also can be replaced by the digital units that continuous high/low level pulse is provided.Similarly, produce circuit 18 in test signal and comprise under the situation of digital units, test instruction produces for example digital signal of different frequency and dutycycle to digital units according to corresponding preset.By digital signal being outputed on the tested control unit of engine 20, thereby can detect the performance of its collection and/or processing digital signal.
It is pointed out that test signal of the present invention produces circuit 18 and is not limited to above-mentioned specific embodiment, variously can provide the signal generating circuit of respective performances test signal all to drop within protection scope of the present invention to control unit of engine.
In addition, as shown in Figure 1, test macro can also comprise load unit 24 and drive load signal detecting unit 26 in an embodiment of the present invention.Load unit 24 provides the load of different loads characteristic according to load characteristic to tested control unit of engine 20, and for example load unit 24 can provide resistive or inductive load.Load unit 24 also receives the driving load signal of tested control unit of engine 20 outputs, square-wave pulse etc. for example, and produce different working conditions (for example voltage waveform) according to the driving load signal that receives and change.The working condition that drives on the load signal detecting unit 26 detection load units 24 changes, thereby detect the driving load signal of tested control unit of engine 20 by load unit 24, and be input in the computer installation 12 by the driving load signal data that single-chip microcomputer 16 will detect, to be used for the driving load performance test of tested control unit of engine 20.
Here, the detection that computer installation 12 receives drives the load signal data, can carry out mould/number conversion by driving the driving load signal of load signal detecting unit 26 with its detection, obtain single-chip microcomputer 16 receivable data, perhaps the above-mentioned detection by 16 pairs of receptions of single-chip microcomputer drives the Data Format Transform that load signal carries out mould/number, perhaps a mould/number conversion element can be set separately in test macro, to realize detecting the conversion that drives load signal.
In one embodiment, tested control unit of engine 20 at first produces the output signal generation driving load data of circuit 18 according to the test signal that for example comprises sensor signal analogue unit and/or switch element, drive load data according to these then and send drive signal, thereby the driving circuit of tested control unit of engine 20 sends the driving load signal to load unit 24 to its inner driving circuit.As indicated above, the driving load signal that load unit 24 provides according to tested control unit of engine 20 produces the corresponding work changed condition, therefore by driving load signal detecting unit 26 detection of the variation of working condition on it is collected the corresponding driving load signal.Tested control unit of engine 20 also outputs to the driving load data of its generation on the single-chip microcomputer 16 by second communicating circuit 22, and should drive load data by single-chip microcomputer 16 and be input in the computer installation 12.
The driving load data that tested control unit of engine 20 directly is transferred to single-chip microcomputer 16 is the one group of driving load data that produces when starting the back operate as normal, for example, start tested control unit of engine 20 work and provide the corresponding driving load data by for example admission pressure, the tach signal etc. of pick-up transducers signal imitation unit and/or switch element (or digital units) output.The driving circuit of tested control unit of engine 20 inside can drive load data according to these and send the driving load signal, and for example square wave such as fuel injection signal, ignition signal is to load unit 24.As indicated above, drive the working condition change-detection driving load signal of load signal detecting unit 26, and inform single-chip microcomputer 16 by load unit 24.
Therefore, the detection that single-chip microcomputer 16 will drive load signal detecting unit 26 output drive load signal by the corresponding data conversion after, be input in the computer installation 12 by first communicating circuit 14.In slave computer, adopt under the communication bus situation of CAN network, first communicating circuit 14 adopts the USB/CAN data converting circuit, thereby computer installation 12 is realized exchanges data by USB interface and single-chip microcomputer 16, can support plug and play, not only data are anti-interference strong, and the transmission data are fast.
Computer installation 12 can comprise load analysis unit (not shown), drive the corresponding data of load signal and driving load data that tested control unit of engine 20 generates compares analysis with the detection that transmits according to single-chip microcomputer 16, the driving load performance that provides tested control unit of engine 20 detects.According to the driving load data that tested control unit of engine 20 is directly exported, the driving load signal that its respective drive generates can be determined in the load analysis unit.Therefore, the load analysis unit is inconsistent with detection driving load signal data if relatively drive load data, and the driving load performance that then detects tested control unit of engine 20 is defective.Otherwise the driving load performance that the load analysis unit detects tested control unit of engine 20 is qualified.
In addition, in an embodiment of the present invention, test macro also comprises and can fault produce circuit 28, as dotted portion correspondence among Fig. 1.Fault produces circuit 28 and is used to produce various fault test signals, and to detect the fault-signal handling property of tested control unit of engine 20, fault produces circuit 28 and for example is made up of relay.
In one embodiment of the invention, fault produces circuit 28 and can be connected test signal and produce circuit 18 and tested control unit of engine 20, and/or be connected between load generation unit 24 and the tested control unit of engine 20.And the output of single-chip microcomputer 16 produces circuit 28 with fault and is connected, thereby the fault of single-chip microcomputer 16 receiving computer devices 12 produces instruction, and makes corresponding fault according to this instruction respective drive fault generation circuit 28.
For example, fault produces circuit 28 and produces the annexation of circuit 18, tested control unit of engine 20 shown in dotted line a among the figure with test signal, therefore when computer installation 12 sends the faults relevant with test signal generation circuit 18 and instructs (for example about sensor signal analogue unit or switch element) by single-chip microcomputer 16, fault produces circuit 28 and instructs according to correspondence, the sensor signal analogue unit or the switch element that test signal are produced circuit 18 carry out power supply short circuit or shorted to earth or open circuit, thereby produce sensor fault or on-off circuit fault.Tested control unit of engine 20 produces the fault that circuit 28 produces according to fault, carries out respective handling and produces corresponding diagnostic trouble code.Tested control unit of engine 20 also is input to single-chip microcomputer 16 by second communicating circuit 22 with the diagnostic trouble code of respective handling, by single-chip microcomputer 16 the corresponding failure sign indicating number is input in the computer installation 12, to carry out the fault handling performance detection of tested control unit of engine 20.
In the case, computer installation 12 also comprises fault analysis unit (not shown), be used for tested control unit of engine 20 is compared analysis by the diagnostic trouble code of single-chip microcomputer 16 outputs and the corresponding fault instruction of computer installation 12 transmissions, whether failure judgement sign indicating number and corresponding predetermined failure instruct consistent.Under inconsistent situation, the fault analysis unit then detects the fault handling performance inconsistency lattice of tested control unit of engine 20; Otherwise detect to qualified.
In addition as shown in Figure 1, in one embodiment of the invention, the annexation of fault generation circuit 28 and load generation unit 24, tested control unit of engine 20 is shown in dotted line b among the figure.Here, fault produces the load faulty instruction that circuit 28 sends according to single-chip microcomputer 16, and load generation unit 24 is made open circuit even load fault.Therefore, after load generation unit 24 broke down, 20 pairs of load faulties of tested control unit of engine were handled.Similarly, the diagnostic trouble code that respective handling obtains is input in the computer installation 12 by single-chip microcomputer 16, with the detection of the corresponding failure handling property that carries out tested control unit of engine 20 by second communicating circuit 22.Load faulty handling property about tested control unit of engine 20 detects, as above, the consistance of diagnostic trouble code and the instruction of its corresponding predetermined computation machine fault judged by the fault analysis unit, thus the testing result of providing.
Therefore, the present invention passes through computing machine, single-chip microcomputer in conjunction with various testing signal generation circuit, load circuit and/or syndrome generated circuit, can test automatically the various function corresponding of control unit of engine, compare traditional manual testing's mode, the present invention is the testing efficiency height not only, and has higher measuring accuracy.
Below, will be described in detail as follows the embodiment of control unit of engine performance test methods of the present invention with reference to figs. 2 to Fig. 4.Wherein Fig. 2 is the control unit of engine performance test methods flow chart of steps of the embodiment of the invention, Fig. 3 is the control unit of engine load performance testing procedure process flow diagram of the embodiment of the invention, and Fig. 4 is the control unit of engine faulty behavior testing procedure process flow diagram of the embodiment of the invention.
With reference now to Fig. 2,, Fig. 2 has provided describe, in general terms to control unit of engine performance test methods of the present invention.
At first, the computer installation transmission from host computer is used for the default test instruction of control unit of engine to single-chip microcomputer (step 102).Can adopt the serial communication interface to connect between computer installation and the single-chip microcomputer, thereby set up data transmission and exchange between them.Default test instruction and predefined test item correspondence to control unit of engine.
Then, by single-chip microcomputer the default test instruction of computer installation output is converted to the test data (step 104) of correspondence.Be that the operation parts can recognition data in the slave computer at single-chip microcomputer place, for example corresponding test simulation signal.Can produce corresponding test signal according to test data slave computer corresponding component, and output to collection and/or the processing (step 106) of carrying out signal on the control unit of engine.
In one embodiment, the test signal that is input to control unit of engine can be sensor signal simulating signal and/or switching signal.The sensor die analog signal is used for control unit of engine to the collection of sensor die analog signal and/or the detection of handling property, and the open and close signal is used for control unit of engine to the collection of open and close signal and/or the detection of handling property.
Control unit of engine is gathered and/or processing test signal, the test signal that corresponding output is gathered and/or the feedback data of processing.Then the test signal of control unit of engine collection and/or the feedback data of processing test signal generation are sent to computer installation (step 108) by single-chip microcomputer.
In computer installation, the tentation data of presetting the test instruction correspondence in collecting test signal and/or feedback data and the computer installation is compared analysis, to carry out the performance test (step 110) of control unit of engine according to corresponding test item.For the acquired signal of control unit of engine output, if compare acquired signal and inconsistent, then the signals collecting function of detection of engine control module existing problems according to the pre-configured actual signal that produces.Test signal for control unit of engine output is handled feedback data, if relatively this processing signals and the pre-configured qualified control unit of engine of the computer installation processing signals that should produce is inconsistent, then the signal processing function of detection of engine control module existing problems.
For example, the sensor signal that should produce according to test instruction is the voltage of 2V, and wherein this voltage data is stored in the computer installation in advance.When the received signal of control unit of engine collection existed deviation and this deviation to exceed predetermined error range with this magnitude of voltage, the signals collecting function of detection of engine control module was defective; If acquired signal is consistent with the predeterminated voltage value in certain error range, then the acquisition function of detection of engine control module is qualified.
In one embodiment of the invention, method of testing of the present invention can also comprise the test to the control unit of engine load performance, and wherein Fig. 3 has provided the control unit of engine load performance testing procedure of the embodiment of the invention.
In one embodiment, test signal can comprise sensor die analog signal and/or switching signal and/or digital signal.In this case, but drive load data (step 202) according to sensor die analog signal and/or switching signal and/or digital signal starting engine control module to produce.Then, control unit of engine sends driving load signal (step 204) according to driving load data.
The driving load data that control unit of engine directly is transferred to single-chip microcomputer is the one group of driving load data that produces when starting the back operate as normal, for example pass through for example admission pressure, the tach signal etc. of the output of sensor signal analogue unit and/or switch element and/or digital signal, the driving circuit of control unit of engine inside can drive load data according to these and drive generation driving load signal, and in the load of input driving load signal to, for example provide resistive, inductive load.By detecting load the different operating situation (for example voltage waveform) that the driving load signal that receives produces is changed, can detect collection, obtain corresponding detection and drive load signal (step 206) driving load signal.Then, the data of the driving load signal correspondence that detects and the driving load data that control unit of engine produces are input to (step 208) in the computer installation by single-chip microcomputer respectively.Here, it is that the driving load signal that will detect carries out obtaining after mould/number conversion that the detection that computer installation receives drives the load signal data, and this detection drives the load signal data and can be changed by single-chip microcomputer, perhaps by other mould/number conversion element conversion.
In computer installation, the driving load data data corresponding with the driving load signal of detection that control unit of engine is directly exported compare analysis (step 210), detect with the driving load performance that provides control unit of engine.
In step 212, by above-mentioned two kinds drive load datas judge relatively whether they consistent.If the data of the driving load data of comparison engine control module output and detection load signal correspondence are inconsistent, then the driving load performance defective (step 214) of detection of engine control module.Otherwise the driving load performance of detection of engine control module is qualified (step 216).
In addition, method of testing of the present invention can also be come the performance of test engine control module according to various faults, can be with reference to figure 4 about the embodiment of faulty behavior test.
Among this embodiment, method of testing can be instructed at least one corresponding generation sensor fault, on-off circuit fault and/or load faulty (step 302) in combined sensor simulating signal, open and close signal and/or the load signal according to the predetermined failure that computer installation sends.It is pointed out that above-mentioned fault only is specific embodiments of the invention, be not used in limitation the present invention, the various fault-signals that are used for the control unit of engine performance test all can be suitable for the present invention.
For example, when the computer installation transmission is instructed about the fault of sensor, on-off circuit or load, by sensor die analog signal or open and close signal or the corresponding sensor of load signal, on-off circuit or load circuit are carried out power supply short circuit or shorted to earth or open circuit, it is unusual to cause above-mentioned signal output to occur, thereby produces corresponding sensor fault or on-off circuit fault or load faulty.
Then, sensor fault, on-off circuit fault and/or load faulty are input in the control unit of engine, so that fault-signal is handled (step 304).Correspondingly, control unit of engine produces corresponding diagnostic trouble code.Then, the corresponding failure sign indicating number of control unit of engine being exported by single-chip microcomputer is input to (step 306) in the computer installation.
In computer installation, with control unit of engine by single-chip microcomputer output diagnostic trouble code and computer installation in the corresponding predetermined failure instruction that sends compare analysis (step 308).In step 310 further the failure judgement sign indicating number whether and predetermined fault instruction corresponding, if inconsistent, the fault handling performance inconsistency lattice (step 314) of detection of engine control module then; Otherwise, detection failure handling property qualified (step 312).
In the testing procedure of Fig. 2, Fig. 3 and Fig. 4 correspondence, can set up communication contact by the CAN network between control unit of engine and the single-chip microcomputer, to improve the efficient of data transmission between them.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (15)
1. the Performance Test System of a control unit of engine is characterized in that, described test macro comprises that computer installation, single-chip microcomputer and test signal produce circuit,
Described computer installation is used for the default test instruction of control unit of engine is sent to described single-chip microcomputer;
Described single-chip microcomputer is converted to described default test instruction and is used for the corresponding test data that described test signal produces circuit;
Described test signal produces the test signal of circuit generation and described test data correspondence and exports control unit of engine to; Wherein
Control unit of engine carries out described test signal collection and/or handles to produce feedback data according to described test signal, and described collecting test signal and/or described feedback data are sent to described computer installation by described single-chip microcomputer, to carry out the performance test of control unit of engine.
2. test macro as claimed in claim 1 is characterized in that, described test signal produces circuit and comprises sensor signal analogue unit and/or switch element;
Described sensor signal analogue unit produces the sensor die analog signal according to the described test data of correspondence, to be used for control unit of engine to the collection of described sensor die analog signal and/or the detection of handling property; And
Described switch element produces the open and close signal according to the described test data of correspondence, to be used for control unit of engine to the collection of described open and close signal and/or the detection of handling property.
3. test macro as claimed in claim 2 is characterized in that, also comprises load unit and drives the load signal detecting unit;
Described load unit is used for providing load to control unit of engine, wherein control unit of engine produces the driving load data and outputs to described single-chip microcomputer according to the output signal of described sensor signal analogue unit and/or described switch element, and control unit of engine sends according to described driving load data and drives load signal and output to described load unit;
Described driving load signal detecting unit is used to detect the described driving load signal that described load unit receives, and the data that described detection drives the load signal correspondence are outputed to described computer installation by described single-chip microcomputer, to be used for the driving load performance test of control unit of engine.
4. test macro as claimed in claim 3 is characterized in that described computer installation also comprises the load analysis unit, is used for comparing analysis according to described detection driving load signal data and described driving load data that described single-chip microcomputer transmits.
5. test macro as claimed in claim 3, it is characterized in that, comprise that also fault produces circuit, the predetermined failure that is used for sending according to described computer installation is instructed, in conjunction with at least one produces sensor fault, on-off circuit fault and/or load faulty in described Sensor Signal Simulation Circuit, on-off circuit and/or the load circuit, to be used for the fault handling performance detection of control unit of engine.
6. test macro as claimed in claim 5, it is characterized in that, described computer installation also comprises the fault analysis unit, be used for that control unit of engine is outputed to the diagnostic trouble code of described computer installation by described single-chip microcomputer and corresponding described predetermined failure instruction compares analysis, wherein, control unit of engine generates described diagnostic trouble code according to described sensor fault, on-off circuit fault and/or load faulty.
7. as each described test macro in the claim 1,3 and 6, it is characterized in that, also comprise communication unit, be used to connect the communication between control unit of engine and the described single-chip microcomputer.
8. test macro as claimed in claim 7 is characterized in that, described communication unit is the CAN network.
9. the performance test methods of a control unit of engine is characterized in that, may further comprise the steps:
Be used for the default test instruction of control unit of engine to single-chip microcomputer from the computer installation transmission;
By described single-chip microcomputer described default test instruction is converted to corresponding test data;
Provide test signal according to described test data, and output to collection and/or the processing of carrying out described test signal in the control unit of engine;
By described single-chip microcomputer with the test signal of control unit of engine collection and/or handle the feedback data that described test signal produces and be sent in the described computer installation; With
The data of default test instruction correspondence described in described test signal and/or described feedback data and the described computer installation are compared analysis, to carry out the performance test of control unit of engine.
10. method of testing as claimed in claim 9 is characterized in that, described test signal comprises sensor die analog signal and/or open and close signal,
Described sensor die analog signal is used for control unit of engine to the collection of described sensor die analog signal and/or the detection of handling property;
Described open and close signal is used for control unit of engine to the collection of described open and close signal and/or the detection of handling property.
11. method of testing as claimed in claim 10 is characterized in that, also comprises:
Drive load data according to described sensor die analog signal and/or described open and close signal enabling control unit of engine to produce;
Control unit of engine is detected according to the driving load signal that described driving load data sends; With
The data and the described driving load data that described detection are driven the load signal correspondence output to described computer installation by described single-chip microcomputer respectively, with the driving load performance of test engine control module.
12. method of testing as claimed in claim 11 is characterized in that, also comprises the step that the described detection load signal data that transmit according to described single-chip microcomputer and described load data compare analysis.
13. method of testing as claimed in claim 11 is characterized in that, also comprises:
Instruct according to the predetermined failure that described computer installation sends, in conjunction with at least one corresponding generation sensor fault, on-off circuit fault and/or load faulty in described sensor die analog signal, open and close signal and/or the load signal;
Control unit of engine produces corresponding diagnostic trouble code according to described sensor fault, on-off circuit fault and/or load faulty; With
Output in the described computer installation by the described diagnostic trouble code of described single-chip microcomputer, to be used for the fault handling performance detection of control unit of engine control unit of engine output.
14. method of testing as claimed in claim 13 is characterized in that, also comprises the step that the corresponding described predetermined failure instruction that sends in described diagnostic trouble code and the described computer installation is compared analysis.
15. as each described method of testing in the claim 9,11 and 13, it is characterized in that, also comprise the step of setting up the communication between described single-chip microcomputer and the control unit of engine by the CAN network, to be used for the data transmission between control unit of engine and the described single-chip microcomputer.
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| CN102541043A (en) * | 2010-12-03 | 2012-07-04 | 富晶电子股份有限公司 | Test mode controller and electronic device with self-testing function |
| CN102866016A (en) * | 2012-10-18 | 2013-01-09 | 徐州重型机械有限公司 | Rapid diagnostic instrument and diagnostic method for engine failure of mobile crane |
| CN103217968A (en) * | 2012-01-20 | 2013-07-24 | 哈尔滨建成集团有限公司 | Electric control unit test system |
| CN103235519A (en) * | 2013-04-28 | 2013-08-07 | 长城汽车股份有限公司 | Intelligent simulation method and system for engine signal |
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