CN104863735A - Timing signal fault diagnosis device for electronic control internal combustion engine - Google Patents
Timing signal fault diagnosis device for electronic control internal combustion engine Download PDFInfo
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- 238000003745 diagnosis Methods 0.000 title abstract description 16
- 238000002485 combustion reaction Methods 0.000 title abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000007493 shaping process Methods 0.000 claims description 13
- 239000002360 explosive Substances 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000004088 simulation Methods 0.000 claims description 7
- 238000003491 array Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 2
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- 230000015556 catabolic process Effects 0.000 claims 1
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- 230000006870 function Effects 0.000 description 7
- 230000005355 Hall effect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
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- 208000037656 Respiratory Sounds Diseases 0.000 description 2
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- 238000002347 injection Methods 0.000 description 2
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- 238000009413 insulation Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 206010017577 Gait disturbance Diseases 0.000 description 1
- 206010021703 Indifference Diseases 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000005690 magnetoelectric effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Control Of Electric Motors In General (AREA)
Abstract
A timing signal fault diagnosis device for an electronic control internal combustion engine comprises a central processing unit 11, a timing signal processor 10, a database memory 12, a user interface 13, timing signal input interfaces 14 and timing signal output interfaces 15. According to the device, three working modes are provided, and an input timing signal format is analyzed and compared with a pre-stored format in the database memory 12 to realize the timing signal fault diagnosis; a timing signal input into a novel engine is analyzed, and the characteristic parameter of the timing signal is stored in the database memory 12 for diagnosis of the fault of the same model of engine in the future; the timing signal is output, an ECU (electronic control unit) is activated, and accordingly, fault diagnosis for an engine which cannot operate is facilitated.
Description
Technical field
The present invention relates to a kind of trouble-shooter of electronic control explosive motor timing signal.
Background technique
Modern internal combustion engines extensively adopts electronic control control techniques (being called for short automatically controlled).Attachedly Figure 1 shows that a typical automatically controlled explosive motor.In Fig. 11 is electric-control motor.2 is computer for controlling ECU.3 is electric actuator, such as, be equipped in the electromagnetic actuator on electric-controlled fuel injector, electrical control oil spray pump etc.5 for detecting the sensor of the physical quantity such as engine pressure, temperature.4 is that engine synchronization speed probe is also known as timing sensor.This sensor is arranged on the very near position of the fluted disc periphery that rotates with speed of crankshaft or camshaft speed, and fluted disc periphery has several double wedges or recessed tooth.When fluted disc rotates, sensor exports the timing signal consistent with fluted disc convex and concave teeth phase place.This sensor mainly contains magnetoelectric and hall effect type.The floating voltage zero cross signal that accompanying drawing 2 exports for magnetoelectricity timing sensor, its voltage signal magnitude increases with engine speed and increases, and during engine speed 100 revs/min, signal voltage amplitude is 100 millivolts of dimensions, during engine speed 5000 revs/min, signal voltage amplitude can more than 100 volts.Need to be shaped as the square wave that amplitude is given magnitude of voltage after this signal input ECU.Original signal Zero Crossing Point becomes the forward position of each square-wave pulse after shaping.Such square-wave pulse signal can carry out digital processing.The square signal of the output signal of Hall effect timing sensor to be amplitude be+5V, directly can carry out digital processing.Timing sensor is the most important sensor of electric-control motor.The timing sensor of normal work guarantees that Engine ECU can produce the necessary condition that signal drives the final controlling element synchronous with engine running.Most electric-control motor adopts " redundancy " of two timing sensor to design, and namely when a timing sensor breaks down, another timing sensor still can keep ECU and engine synchronization work.But the performance of motor will inevitably be affected, " limping " mode that usually can export with power-limiting is run.Two road timing signal all break down and will directly cause motor to operate.A usual timing sensor is to engine crankshaft rotating speed fluted disc generation timing signal, and another timing sensor is to being arranged on camshaft speed fluted disc generation timing signal.Two timing sensor on some motors all utilize same camshaft speed fluted disc generation timing signal.The form of the timing signal of electric-control motor is a lot, is normally made up of even teeth and special tooth.Special tooth can be divided into, and does not have special tooth; Subtract tooth, in accompanying drawing 36 for subtracting a tooth position; Add tooth, in accompanying drawing 47 for adding a tooth position; Displacement tooth, in accompanying drawing 58 is displacement one tooth position.
The main tool of current electric-control motor fault diagnosis comprises Engine ECU fault decoder, general multimeter, electric current clamp, and universal electric oscillograph.Electric-control motor fault diagnosis can be divided into two stages, and the first stage reads the Self-fault diagnosis code of ECU record by Engine ECU decoder.Because ECU self-diagnostic function can only point out the roughly direction of engine failure, be difficult to the concrete component determining the root producing fault.Therefore, after reading ECU failure code, also need the fault diagnosis of carrying out second stage, find out real fault component.The engine diagnostic of current second stage, maintenance man can only by rule of thumb with general multimeter one by one part investigation, many times also need employing dismantle suspect problematic old part, install new parts determine failed part.Common explosive motor timing signal fault diagnosis is one of task that maintenance practitioner is the most thorny.The failure code of timing signal mistake can be read by Engine ECU decoder.But causing the source of this failure code may be timing signal sensor failure, may be rat tail fault, may be ECU interlock circuit fault, may be also the fluted disc setup error or the fluted disc mass defect that produce timing signal.Minority electric-control motor garage, adopts the waveform of general purpose oscialloscope display timing signal, and by waveform, examining of the angular phase difference between umber of pulse and two timing signal, could determine the source of trouble of timing signal.For great majority maintenance practitioner, do not possess the technical skills using general purpose oscialloscope, therefore can only completely by rule of thumb, dismounting relevant elements investigation fault.
Summary of the invention
The invention provides a kind of electronic control explosive motor timing signal trouble-shooter, there is following function:
Detect the signal from timing sensor, compare to the corresponding engine timing signal of internal data library storage, judge the fault of timing signal.
By detecting the timing signal of a normal engine, the engine timing signal do not had in learning database, expanding data storehouse.
Send timing signal, activate Engine ECU, fault diagnosis is carried out to the ECU of the motor that cannot operate and various final controlling element.
technological scheme of the present invention is
Attachedly Figure 5 shows that automatically controlled explosive motor timing signal trouble-shooter of the present invention.9 is the present invention.10 is timing signal processor, is used for identifying the engine timing sensor signal of input and producing the signal output of simulated engine timing sensor, drives and activates ECU.14 is motor two the timing sensor timing signal inputted.15 is the two tunnels output timing signal that timing sensor simulated by timing signal processor.11 is central data processor.12 is storage.13 is user interface, comprises display screen and keyboard.
Timing signal processor 10 has two fundamental functions.Fundamental function one is two road timing signal of the engine timing sensor identifying input, sees accompanying drawing 7.Motor two road timing signal 14 is input to signal transformation circuit 16, and the floating zero cross signal of magnetoelectric transducer is shaped as square signal.Square signal input timing signal identification module 17 after shaping, carries out signal transacting.The mode of operation of timing signal faut detection mode of operation of the present invention and study new engine timing signal is all the function at application identification input timing signal.Fundamental function two is that the two road timing signal that given motor occurs export, and sees accompanying drawing 8.The two road timing signal exported are used for activating Engine ECU, so that make further fault diagnosis to motor.
Engine timing signal leaves in the database of storage 12, take engine model as storage unit, and every unit stores one group of two kinds of timing signal.Database has prestored the characteristic parameter of timing signal group of various engines.All timing signal are all the cycle with engine operational cycle, and the dust cycle for four-stroke ic engine is 720 bent axle degree, are 360 bent axle degree for two-stroke internal combustion engine.Discussion is below as the criterion with most extensive use four-stroke ic engine.These characteristic parameters comprise:
Engine type, 1 is two-stroke, and 2 is four-stroke;
Timing sensor type, 1 is magnetoelectric, and 2 is hall effect type;
Even teeth interval crankshaft angles;
Special tooth type, 0 for not having special tooth, and 1 for subtracting tooth, and 2 for adding a tooth, and 3 is displacement one tooth;
The frequency that special tooth occurs within the engine operational cycle cycle;
When special tooth is for subtracting tooth, each position subtracts number of teeth order;
When adding tooth or displacement tooth, the crankshaft angles of the next orthodont of special tooth pitch;
Often organize the crankshaft angles phase difference between two kinds of timing signal.
When the present invention is set to the engine timing signal identifying input, see accompanying drawing 7, input signal shaping circuit 16 and pulse signal identification module 17 are parts of timing signal processor 10.Motor should remain on stable idling, guarantees that the timing signal inputted is stablized.The two road timing signal 14 from motor two timing sensor are input to input signal shaping circuit 16, and being converted to the floating zero cross signal of electromagnetic sensor with Zero Crossing Point is the square signal in forward position.Through the square signal input pulse Signal analysis module 17 of shaping.A hardware timer is established in module 17.When user instruction timing signal identification mission starts, timer is started the clock, and when each square-wave pulse forward position through shaping of two road timing signal occurs, gathers the time of timer.The time sampling value of two road timing signal is recorded respectively by two number groups.Like this, in the recognition time section of regulation, two burst length sequence arrays of two road timing signal are defined.
Choosing of the time resolution of the hardware timer in module 17:
The crankshaft angles resolution of timing signal waveform recognition: be not more than 0.2 bent axle degree
Engine idle scope: 600-1200 rev/min, selects 1200 revs/min
The resolution of hardware timer: be not more than 27.8 microseconds.
Choosing of timing signal recognition time segment length:
The timing signal length gathered: be no less than three engine cycles, i.e. the time of engine rotation 6 turns, guarantee at least to collect the timing signal that two tunnels of an engine cycle are complete
Engine idle scope: 600-1200 rev/min, selects 600 revs/min
Timing signal recognition time segment length: be no less than 0.6 second.
The burst length sequence of two road timing signal, from same timer, therefore by these two time series arrays, both can judge the form of every road timing signal, also can judge the crankshaft angles phase difference between two road timing signal.Two road timing signal of motor, wherein at least one road is cam tach signal, and namely the cycle is the signal of 720 crank angle.Most engine cam timing signal has the special tooth of many teeth or displacement one tooth.Therefore, by analyzing cam timing signal, the time in the timing signal cycle of 720 crank angle of the continuous effective in two tunnel time serieses can be determined, then calculate the crankshaft angles corresponding with interpulse period, finally determine with the phase difference between the respective waveform of two road timing signal of crankshaft angles definition and two road timing signal thereof.Need to eliminate due to the timing signal Acquisition Error that engine speed is unstable or crankshaft torsional vibrations causes in time series data process.Be greater than the timing pulse offsets of 2 crank angle, then should think what timing signal fault caused.Under condition, data processing please be carried out to two road timing signal time serieses what there is no a timing signal fault, by obtain this motor previously defined timing signal characteristic parameter in units of crank shaft angle.
When the present invention is set to study new engine timing signal pattern, inputs new engine model by user interface 13, set up corresponding storage unit in a database.After successfully completing the identification to two road timing signal, by the timing signal characteristic parameter that obtains stored in this engine unit in database, in order to diagnosing the motor of same model from now on.
When the present invention is set to timing signal fault diagnosis model, inputted the engine model of required checkout and diagnosis by user interface 13, from database 12, read corresponding timing signal characteristic parameter by central data processor 11.Operate motor to be measured, identifies two road timing signal.Then by the timing signal characteristic parameter in addition comparison of this motor in the timing signal characteristic parameter of actual measurement and database.If measured value and database value indifference, then the timing signal fault-free of tested motor.If measured value and database value have difference, then the timing signal of motor has fault.The timing signal fault monitored can be classified as follows:
Two road timing signal form is separately all errorless, but the relative angle phase place of two road signals has a crankshaft angles error.Show that the setting angle of a wherein road timing fluted disc has misplaced this crankshaft angles.
One road timing signal form is errorless, the unnecessary pulse signal determining angular orientation is repeated in another road timing signal form.Show that this road signal fluted disc has fault, such as, have the defect such as crackle or burr in a certain angular orientation.
One road timing signal form is errorless, has the random unnecessary pulse signal occurred in another road timing signal form.Show this road signal emitter is stained with iron filings, or wire harness insulation shielding has problem.
Two road timing signal forms are all wrong, any timing signal of Engine ECU None-identified, and can not send any actuator driven signal, motor cannot start running.
To show in user interface 13 by detecting the detailed error information obtained.
Break down at automatically controlled explosive motor, when can not operate, need to adopt another function of the present invention, export two road timing signal and activate ECU, then diagnose the fault of ECU and each final controlling element.Accompanying drawing 8 is timing signal output mode block diagram, timing signal generation module 18, and output waveform Shaping Module 19,20 and switch 21,22 are all parts for timing signal processor 10.Operator inputs the engine speed of tested engine model and setting by user interface 13.Central processing unit (CPU) 11 reads the timing signal characteristic parameter of this motor from database 12.Timing signal generation module 18 constructs two road timing signal square wave forms according to characteristic parameter and engine speed.According to the kind of the timing sensor of timing signal simulation, respectively timing signal square wave is shaped as required output waveform.The square wave being shaped as the+5V amplitude of analog hall-effect sensor by two module 19 Ge Jiang mono-road timing signal is exported.The floating zero cross signal being shaped as simulation magnetoelectric transducer by two module 20 Ge Jiang mono-road timing signal is exported.The guiding of " the timing sensor type item " control switch 21 and 22 in timing signal characteristic parameter, the timing sensor achieved same output interface 15 automatic switchover simulation Hall effect is different with simulation magnetoelectricity two kinds exports.
Module 20 in the present invention adopts digital to analog converter (DA), and timing square signal module 18 produced is converted to zero cross signal.Each party's wave impulse forward position forms a Zero Crossing Point.The signal waveform of each Zero Crossing Point neighborhood is the fixing monocycle, and the sine wave of fixed amplitude or pyramidal wave, be shown in accompanying drawing 9.Its fixed amplitude can be 1 to 5 volt, and the fixing monocycle is by engine peak speed, and possible minimum timing signal space width determines.Engine peak speed 5000 revs/min, minimum timing signal space width 10 bent axle degree.The fixing monocycle of simulation zero cross signal waveform should be less than 0.4 millisecond.Can select to simulate the zero cross signal cycle 0.2 millisecond.
By changing engine speed in user interface 13, timing signal generation module 18 will change the frequency of the timing signal exported, and the timing signal under rotating speed is being specified in being output into of output interface 15.
Once Engine ECU is activated by the timing signal that the present invention exports, just can the fault of Diagnosis on Engine ECU and each final controlling element further.
Accompanying drawing explanation
Accompanying drawing 1, automatically controlled explosive motor
Accompanying drawing 2, the voltage signal of magnetoelectric timing sensor
Accompanying drawing 3, timing sensor and timing signal fluted disc, by even teeth with subtract a tooth position and form
Accompanying drawing 4, timing sensor and timing signal fluted disc, by even teeth with add a tooth and form
Accompanying drawing 5, timing sensor and timing signal fluted disc, be made up of even teeth and a displacement tooth
Accompanying drawing 6, block diagram of the present invention
Accompanying drawing 7, identifies input timing signal block diagram
Accompanying drawing 8, exports timing signal block diagram
Accompanying drawing 9, the waveform of the simulation magnetoelectricity timing sensor signal of output
Embodiment
timing signal faut detection pattern
An electronic fuel injection engine 1 still can operate.ECU failure code indicates a road timing signal fault.
By two timing sensor 4 of two threeway cable connecting engines, Engine ECU 2 and two timing signal input ends 14 of the present invention.Such Engine ECU 2 and the present invention 9 can detect the signal of 2 tunnel timing sensor 4 simultaneously.
Engine model to be measured is selected by user interface 13.Central processing unit (CPU) 11 reads in the corresponding timing signal characteristic parameter in database 12.
Ato unit, is stabilized in idling.Start to detect timing signal by user interface 13 instruction.
The timing signal 14 of input becomes square signal through shaping circuit 16, identifies that input timing signal module 17 identifies two tunnel timing square signals, produces two roadbeds in the time series of same clock.Central processing unit (CPU) 11 is analysed and compared the timing sensor characteristic parameter of database and measured value, just can judge the following fault of timing signal.
Two road timing signal waveform is separately all errorless, but the relative angle phase place of two road signals has a crankshaft angles error.Show that the setting angle of a wherein road timing fluted disc has misplaced this crankshaft angles.
One road timing signal waveform is errorless, and another road timing signal waveform has the unnecessary pulse signal determining angular orientation is repeated.Show that this road signal fluted disc has fault, such as, have the defect such as crackle or burr in a certain angular orientation.
One road timing signal waveform is errorless, and another road timing signal waveform has the random unnecessary pulse signal occurred.Show this road timing sensor is stained with iron filings, or wire harness insulation shielding has problem.
timing signal mode of learning
Certain model electric-control motor is not in database 12.Need the motor that this model is normally run.
By two timing sensor 4 of two threeway cable connecting engines, Engine ECU 2 and two timing signal input ends 14 of the present invention.Such Engine ECU 2 and the present invention 9 can detect 2 road timing signal sensor signals 4 simultaneously.
Engine model to be measured is added, the respective memory unit in building database 12 by user interface 13.
Ato unit, is stabilized in idling.Start to detect timing signal by user interface 13 instruction.
The timing signal 14 of input becomes square signal through shaping circuit 16, identifies that input timing signal module 17 identifies two road timing signal square waves, produces two roadbeds in the time series of same clock.The characteristic parameter that this two tunnels time series just can obtain this two roads timing signal analyzed by central processing unit (CPU) 11.
By the timing signal characteristic parameter that the records database storage unit stored in new engine, wait until when detecting same model engine failure from now on and use.
timing signal output mode
A fault electric-control motor cannot operate.
Two timing signal output terminals 15 of the present invention and Engine ECU 2 corresponding port is connected with cable.
Select engine model to be measured by user interface 13, and set engine speed.
Central processing unit (CPU) 11 reads in the corresponding timing signal characteristic parameter in database 12.Through timing signal generation module 18, produce the square of timing signal.According in characteristic parameter, " " definition of item, is conducting to corresponding shaping circuit 20 by switch 21 and 22 to kind of sensor automatically, and the magnetoelectricity analog output signal of generation output, or shaping circuit 19, produce Hall analog output signal.The timing signal exported will activate ECU.ECU is sent and drives electric actuator 3 with the signal of engine synchronization, such as fuel injector magnetic system or fuel injection pump solenoid.So that make further fault diagnosis to Engine ECU and various electric actuator.
Claims (8)
1. a trouble-shooter for automatically controlled explosive motor timing signal, by central processing unit (CPU), timing signal processor, archival memory, user interface, timing signal input interface, and timing signal output interface is formed.It is characterized in that: the multiple format of two road timing signal of various electric-control motor is expressed with unified characteristic parameter, comprises engine type, 1 is two-stroke, and 2 is four-stroke; Sensor type, 1 magnetoelectric, 2 is Hall-type; Even teeth interval crank shaft angle; Special tooth type, 0 for not having special tooth, and 1 for subtracting tooth, and 2 for adding a tooth, and 3 is displacement one tooth; The frequency that special tooth occurs in an engine operating cycle; When special tooth is for subtracting tooth, each position subtracts number of teeth order; When adding a tooth or displacement one tooth, the crankshaft angles of the next orthodont of special tooth pitch; Often organize the crankshaft angles phase difference between two kinds of timing signal.
2. device as claimed in claim 1, is characterized in that: its database stores the timing signal of various engines model with characteristic parameter form.
3. device as claimed in claim 1, is characterized in that: carry out time sampling in each pulse front edge moment of two road engine timing signals of input to the timer of in timing signal processor, and be recorded in respectively in two time series arrays.Data processing is carried out to these two arrays, obtains the characteristic parameter of this two roads timing signal.
4. device as claimed in claim 1, is characterized in that: by the new engine timing signal characteristic parameter of actual measurement, be added into newly-established storage unit in database, diagnose for same model breakdown in the motor.
5. device as claimed in claim 1, is characterized in that: the contrast of the timing signal characteristic parameter prestored by database and actual measurement engine timing signal format, judges engine timing signal fault.
6. device as claimed in claim 1, is characterized in that: timing signal processor is by the timing signal characteristic parameter in database, and the engine speed of setting, generates two road timing signal and exports.
7. device as claimed in claim 1, is characterized in that: " sensor type " item of characteristic parameter, corresponding waveform-shaping module in automatic conducting timing signal processor, realizes automatically switching the sensor signal waveform that will simulate at single rice delivery outbound port.
8. device as claimed in claim 1, it is characterized in that: the monocycle sine wave of the fixed amplitude adopting D/A converting circuit to produce in timing signal processor, fixed cycle or pyramidal wave carry out shaping to square signal, export the zero cross signal of simulation magnetoelectric transducer.
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| CN201410063383.7A CN104863735B (en) | 2014-02-21 | 2014-02-21 | Automatically controlled explosive motor timing signal trouble-shooter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106556517A (en) * | 2015-09-25 | 2017-04-05 | 北京因极技术有限公司 | Multifunction electro-controlled explosive motor trouble-shooter |
| CN108140003A (en) * | 2015-10-02 | 2018-06-08 | 标致雪铁龙汽车股份有限公司 | The method that diagnosis is connected to the Electric Actuator of computer |
| CN108426716A (en) * | 2018-02-07 | 2018-08-21 | 奇瑞汽车股份有限公司 | Fault detection system and method for engine development stage |
| CN108733867A (en) * | 2017-04-18 | 2018-11-02 | 通用电气公司 | To monitor turbogenerator health and fitness information method and apparatus |
| CN109269804A (en) * | 2018-11-06 | 2019-01-25 | 潍柴动力股份有限公司 | A kind of Wiring detection method and detection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106556517A (en) * | 2015-09-25 | 2017-04-05 | 北京因极技术有限公司 | Multifunction electro-controlled explosive motor trouble-shooter |
| CN108140003A (en) * | 2015-10-02 | 2018-06-08 | 标致雪铁龙汽车股份有限公司 | The method that diagnosis is connected to the Electric Actuator of computer |
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| CN109269804A (en) * | 2018-11-06 | 2019-01-25 | 潍柴动力股份有限公司 | A kind of Wiring detection method and detection system |
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| CN104863735B (en) | 2017-12-01 |
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