CN107945644A - Engine signal wheel sensor HWIL simulation tutoring system - Google Patents
Engine signal wheel sensor HWIL simulation tutoring system Download PDFInfo
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- 238000004088 simulation Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims description 10
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- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims 2
- 230000033228 biological regulation Effects 0.000 description 6
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- 230000008859 change Effects 0.000 description 4
- 210000003464 cuspid Anatomy 0.000 description 4
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- 230000005284 excitation Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- 230000008450 motivation Effects 0.000 description 2
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- 206010055001 Hypodontia Diseases 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 206010002583 anodontia Diseases 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
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- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 238000007493 shaping process Methods 0.000 description 1
- 201000006680 tooth agenesis Diseases 0.000 description 1
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- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The present invention relates to a kind of engine signal wheel sensor HWIL simulation tutoring system of the present invention, including motor, crankshaft position sensor, CMPS Camshaft Position Sensor, potentiometer controller, engine analyzer, power supply, supporting rack, signal panels one, signal panels two, small pulley, big belt wheel, toothed belt, the motor is electrically connected with potentiometer controller, crankshaft position sensor respectively, engine analyzer is electrically connected with crankshaft position sensor, CMPS Camshaft Position Sensor respectively, and power supply is electrically connected with potentiometer controller, CMPS Camshaft Position Sensor respectively；Support frame as described above is connected with signal panels one, signal panels two, small pulley, big belt wheel, crankshaft position sensor, CMPS Camshaft Position Sensor, and toothed belt is connected with small pulley, big belt wheel respectively.The present invention has the function of stronger demo function and configuration shows, the true working order for reducing engine signal wheel sensor, and signal output meets the truth of engine operating, and timing is accurate.
Description
Technical field
The present invention relates to a kind of test system of simulated engine operating, and in particular to a kind of engine signal wheel sensor
HWIL simulation tutoring system.
Background technology
Signal wheel sensor is sensor representative in sensor, is that rotating tach signal is transformed into telecommunications
Number output sensor, Hall-type, magneto-electric and photoelectric tachometric transducer generally can be divided into according to test philosophy.On engine
The signal wheel sensor of use has two kinds, and one kind is crankshaft position sensor, and another kind is CMPS Camshaft Position Sensor, is to start
Particularly important sensor in electronic control system, uses Hall-type or magneto-electric, both sensors belong to signal more
Take turns the sensor of triggering.Relation between camshaft-position signal and crankshaft-position signal is that bent axle takes two turns, camshaft signal
Rotor turns around, and crankshaft-position signal rotor takes two turns, and engine computer can judge cylinder according to the signal of two sensors
Impulse stroke simultaneously controls electronic spark advance moment, oil injection time and fuel injection pulsewidth, therefore it exports signal and is directly influencing igniting just
When, the precision of injection timing and VVT controls, so as to influence engine power performance, fuel consumption and emission spatter property.Therefore,
The sensor construction, operation principle, signal output characteristic are grasped for maintenance technician has automobile failure diagnosis
Extremely important meaning.
Fundamentals of Sensors and the specialized core course that application is students of science and technology, its content of courses is with testing close phase
Close.At present, it is the prototype system on engine pedestal that the instruments used for education of in the market sensor are a kind of, and another kind is to use motor
Driver control, portioned product control motor speed with dsp controller, and Measure Precision can meet substantially.The former cannot see that biography
The structure of sensor, causes the wasting of resources and environmental pollution, the latter is single in the when engine operation of measurement and the reading of signal
The displaying of the structure and operation principle of sensor, it is impossible to which the signal of two kinds of sensors closes when showing engine work well
System.
The content of the invention
The object of the present invention is to provide a kind of engine signal wheel sensor HWIL simulation tutoring system, has stronger
Demo function and configuration shows function, and have the signal waveform measurement function of sensor, contribute to engineers and technicians to grasp and pass
Sensor structure, operation principle and signal output, the true working order for reducing engine signal wheel sensor, and signal output accords with
The truth of engine operating is closed, and timing is accurate.
In order to achieve the above object, the present invention has following technical solution：
A kind of engine signal wheel sensor HWIL simulation tutoring system of the present invention, including motor, crank position pass
Sensor, CMPS Camshaft Position Sensor, potentiometer controller, engine analyzer, power supply, supporting rack, signal panels one, signal panels
2nd, small pulley, big belt wheel, toothed belt, the motor are electrically connected with potentiometer controller, crankshaft position sensor, start respectively
Machine analyzer is electrically connected with crankshaft position sensor, CMPS Camshaft Position Sensor respectively, power supply respectively with potentiometer controller, convex
Shaft position sensor is taken turns to be electrically connected；Support frame as described above is sensed with signal panels one, signal panels two, small pulley, big belt wheel, crank position
Device, CMPS Camshaft Position Sensor connection, toothed belt are connected with small pulley, big belt wheel respectively；The potentiometer controller passes through control
Voltage output processed, controls motor speed, 0-3640 revs/min of speed adjustable range；Motor directly drives crankshaft position sensor to rotate, by
Speed of crankshaft and camshaft speed are 2 during the engine real-world operation simulated：1 relation, so passing through bent axle position
Put sensor to drive by small pulley, big belt wheel transmission, gearratio 2:1, which rotates drive camshaft-signal sensor, rotates,
Engine analyzer installation signal testing passage 1 and passage 2 are connected respectively to crankshaft position sensor and camshaft location sensing
Device signal output part, respectively obtains the signal output characteristic of two sensors, by varying potentiometer controller output voltage, mould
Send out motivation operating and just obtain different running speeds, therefore can see the signal output characteristic in the case of different rotating speeds.
Wherein, the crankshaft position sensor includes sensor lead, permanent magnet, air gap one, double wedge, signal wheel one,
The sensor lead is respectively signal wire, signal ground and shielding line, and the signal wire is connected with the coil on permanent magnet, institute
State signal wheel one to be located at below permanent magnet, air gap one is between signal wheel one and permanent magnet, and the double wedge is in signal wheel
One edge.
Wherein, the CMPS Camshaft Position Sensor includes impeller, signal wheel two, permanent magnet, Hall element, air gap two,
The signal wheel two is connected with permanent magnet, and air gap two is between signal wheel and Hall element, and impeller is on the side of signal wheel two
On edge.
Due to taking above technical scheme, the advantage of the invention is that：
The present invention is compared with conventional welding devices：
1st, there is stronger demo function and configuration shows, and have the signal waveform measurement function of sensor, help
Sensor construction, operation principle and signal output are grasped in engineers and technicians.
2nd, the testing stand replaces engine to operate with motor, reduces air pollution, and realizes electric machine speed regulation with power supply, adjusts
Fast 0-3640 revs/min of scope.
3rd, the truly working order of reduction engine signal wheel sensor, and signal output meets the true of engine operating
Situation, and timing is accurate.
Brief description of the drawings
Fig. 1 is the block diagram of present system；
Fig. 2 is the schematic diagram of structure of the present invention；
Fig. 3 is the structure diagram of crankshaft position sensor of the present invention；
Fig. 4 is the structure diagram of CMPS Camshaft Position Sensor of the present invention；
Fig. 5 CMPS Camshaft Position Sensor and CMPS Camshaft Position Sensor output in the case of 760 revs/min of idling for the present invention
Signal waveforms；
Fig. 6 CMPS Camshaft Position Sensor and CMPS Camshaft Position Sensor output letter in the case of 1800 revs/min for the present invention
Number oscillogram；
Fig. 7 CMPS Camshaft Position Sensor and CMPS Camshaft Position Sensor output letter in the case of 3450 revs/min for the present invention
Number oscillogram；
Fig. 8 CMPS Camshaft Position Sensor and camshaft location sensing in the case of 3640 revs/min of maximum (top) speed for the present invention
Device signal output waveform figure.
In figure：1 motor, 2 supporting racks, 3 small pulleys, 4 CMPS Camshaft Position Sensors, 5 signal panels, 6 toothed belts, 7 big belt wheels,
8 signal panels, 9 crankshaft position sensors, 1-1 sensor leads, 2-1 permanent magnets, 3-1 air gaps one, 4-1 double wedges, 5-1 signal wheels
One, 1-2 impeller, 2-2 signals wheel two, 3-2 permanent magnets, 4-2 Hall elements, 5-2 air gaps two；U-CH1 passages 1, U-CH2 passages
2。
Embodiment
Following embodiments are used to illustrate the present invention, but are not limited to the scope of the present invention.
Referring to attached drawing 1-8, a kind of engine signal wheel sensor HWIL simulation tutoring system of the invention, including electricity
Machine, crankshaft position sensor, CMPS Camshaft Position Sensor, potentiometer controller, engine analyzer, power supply, supporting rack, signal
Disk one, signal panels two, small pulley, big belt wheel, toothed belt, the motor respectively with potentiometer controller, crankshaft position sensor
Be electrically connected, engine analyzer is electrically connected with crankshaft position sensor, CMPS Camshaft Position Sensor respectively, power supply respectively with current potential
Count controller, CMPS Camshaft Position Sensor is electrically connected；Support frame as described above and signal panels one, signal panels two, small pulley, big belt wheel,
Crankshaft position sensor, CMPS Camshaft Position Sensor connection, toothed belt are connected with small pulley, big belt wheel respectively；The potentiometer
Controller controls motor speed, 0-3640 revs/min of speed adjustable range by controlling voltage output；Motor directly drives crank position
Sensor rotation, since speed of crankshaft and camshaft speed are 2 during the engine real-world operation simulated：1 relation, institute
To be driven by crankshaft position sensor by small pulley, big belt wheel transmission, gearratio 2:1 rotates drive camshaft-signal sensor
Rotate, engine analyzer installation signal testing passage 1 and passage 2 are connected respectively to crankshaft position sensor and cam
Shaft position sensor signal output part, respectively obtains the signal output characteristic of two sensors, by varying potentiometer controller
Output voltage, simulated engine operating just obtains different running speeds, therefore can see that the signal in the case of different rotating speeds is defeated
Go out characteristic.
The crankshaft position sensor includes sensor lead, permanent magnet, air gap one, double wedge, signal wheel one, the biography
Sensor lead is respectively signal wire, signal ground and shielding line, and the signal wire is connected with the coil on permanent magnet, the signal
Wheel one is below permanent magnet, and air gap one is between signal wheel one and permanent magnet, and the double wedge is on the side of signal wheel one
At edge.
Crankshaft position sensor forms core element by the electromagnetic coil outside a permanent magnet iron core and iron core.It is tied
Structure principle is as shown in figure 3, the wiring of sensor has three, signal wire, signal ground, shielding line.
Signal wheel is toothed disc type, and circumferentially uniform intervals make 58 double wedges, 57 small teeth and a canine tooth and lack, canine tooth
Lack shared radian and shared radian is lacked equivalent to two double wedges and 3 small teeth, canine tooth lacks output reference signal, and corresponding simulation is started
The position of 1 cylinder of machine or 4 cylinder compression top centers, to judge speed of crankshaft and corner signal.Due to rotor double wedge and forever
Air gap one between long magnet directly affects the magnetic resistance and induction coil output voltage height on this road, therefore between double wedge and permanent magnet
One size of air gap be typically designed as 0.2-0.4mm.The performance parameter of crankshaft position sensor is shown in Table 1 with technical specification.
1 magneto electric type crankshaft position sensor performance parameter of table and technical specification
The CMPS Camshaft Position Sensor includes impeller, signal wheel two, permanent magnet, Hall element, air gap two, the letter
Number wheel two is connected with permanent magnet, and air gap two is between signal wheel and Hall element, and impeller is on the edge of signal wheel two.
CMPS Camshaft Position Sensor is compact-sized, and main composition parts are few, and assembly technology is easy.Camshaft location senses
Its structural principle of device is as shown in Figure 4.Signal wheel two is also known as signal triggering impeller, when the impeller on signal wheel two passes through Hall element
Low level is exported, it is the high status of output to leave Hall element, and it is to sense exactly, detect camshaft in the hair simulated that it, which is acted on,
Relative rotation angle position in motivation operational process, and ECU is supplied in the form of voltage signal, easy to ECU combination crank positions
Sensor signal, is appropriately determined the operating phase residing for the moment per cylinder engine, makes engine of the system according to regulation
Job order control fuel oil injection and ignition order.So as to more precisely control the combustion process of engine, harmful combustion is reduced
Burn emission.CMPS Camshaft Position Sensor uses three leads, one be engine computer power supply power cord, one is sensing
Device supply lines, it is ground strap to also have one.The performance parameter and technical specification of CMPS Camshaft Position Sensor are shown in Table 2.
2 Hall camshaft position sensor performance parameter of table and technical specification
Transmission parts design and type selecting：
Motor, chooses small low-voltage dc motor, the production of Yi Jufeng Science and Technology Ltd.s of Shenzhen of manufacturer
MY6812A type motors, operating voltage 12v, non-loaded rotating speed 3800, output power 100W, it is small that the daily duration of runs is no more than 4
When, crankshaft position sensor and CMPS Camshaft Position Sensor are to realize engine ignition timing, injection timing and reduce to discharge dirt
Contaminating the very important sensor of thing, it is necessary to Synchronous Transmission, and gearratio i=2, since toothed belt has, noise is small, and cost is low,
The features such as reliable operation, elongation is small, and transmitting accuracy is high, meets the performance requirement of testing stand.According to transmission power and rotating speed simultaneously
The model of toothed belt is chosen with reference to actual conditions, finally definite bandwidth and the number of teeth and structural parameters of big small pulley are as follows.
Synchronous belt model：60XL025；
Small band tooth number：16；
Small pulley pitch diameter 25.87mm；
The big belt wheel number of teeth：32；
Big belt wheel pitch diameter:51.74mm；
Bandwidth 6.4mm；
Centre-to-centre spacing：100mm.
DC motor speed controls：
When motor uses direct current generator, direct current generator can be divided into by the difference of excitation mode：Separate excitation, shunt excitation, series excitation and multiple
Encourage four kinds of motor.Different exciting mode, the mechanical characteristic of direct current generator are also different.The artificial machinery for direct current generator
Characteristic equation is：
In formula：n0The ideal no-load speed of motor, its value are
Δ n is speed discrepancy；
UaPressure is that armature supply is electric (V)；
RaIt is armatureresistance (Ω)；
φ is magnetic flux (Wb)；
CEIt is the coefficient of potential；
CTMoment coefficient；
T is the time.
Regulation motor rotating speed is wanted to change armature resistance R it can be seen from formulaa, armature voltage UaWith magnetic flux φ, but
It is that can realize smooth stepless speed regulation using changing armature voltage speed governing, and the advantages that speed governing is stablized, and speed adjustable range is big.Therefore this
Invention changes armature voltage so as to change motor speed in the form of potentiometer controller partial pressure.Using Beijing dragon electricity electricity
The B10K potentiometer controllers control motor speed of machine Co., Ltd production, range of regulation is in 0-12V.
Semi-matter simulating system performance test：
The power supply SPD-400-XX that the large rich electronics in Changzhou provides is connected on present system, power supply has the two-way of 12V
Output power supply, provides reliable power supply to motor and CMPS Camshaft Position Sensor respectively.It is limited using Bosch Nanjing Automobile component
The engine analyzer of company's production, model FSA740, reads motor in the sensor signal output waveform of different rotating speeds, passage 1
Collecting crankshaft position signal output waveform, passage 2 gather camshaft-position signal waveform, crankshaft position sensor, cam axle position
Put sensor signal output system test as shown in Figure 1, signal output waveform as viewed in figures 5-8.It can be seen that from Fig. 5-8
Crankshaft position sensor takes two turns, and CMPS Camshaft Position Sensor turns around, in simulated engine bent axle magnetoelectric sensor canine tooth
Hypodontia output baseband signal just correspond to camshaft and exports low level, at this time the as signal of 1 cylinder compression top center, through overtesting
Verification shows 0-3640 revs/min of the signal testing stand speed adjustable range, and signal output meets simulated engine signal output feature, full
Sufficient design requirement.
Power supply：The power supply SPD-400-XX that the large rich electronics in Changzhou provides is connected on experimental bench, the power supply is defeated with two-way
Go out power supply, provide reliable power supply to motor and Hall sensor respectively.
Motor：Small low-voltage dc motor is chosen, the production of Yi Jufeng Science and Technology Ltd.s of Shenzhen of manufacturer
MY6812A type motors, operating voltage 12v, non-loaded rotating speed 3800, output power 100W, it is small that the daily duration of runs is no more than 4
When.
Potentiometer controller：The system changes armature voltage so as to change motor speed in the form of potentiometer partial pressure.
Motor speed is controlled using the B10K potentiometer controllers of Beijing Long electricity Electric Machine Co., Ltd production, range of regulation is in 0-
12V。
ECU (Electronic Control Unit) electronic control unit, also known as " car running computer ", " vehicle-mounted computer " etc..
It is then automobile specified microcomputerized controller from purposes, is also automobile specified microcontroller.It is as common microcontroller, by micro-
Processor (CPU), memory (ROM, RAM), input/output interface (I/O), analog-digital converter (A/D) and shaping, driving etc.
Large scale integrated circuit forms.
VVT variable valve timing technology, is exactly under specific engine operating condition, by controlling IO Intake Valve Opens angle to carry
Preceding and delay is come the size that adjusts intake and exhaust amount and moment and change valve overlap, to realize increase charge and efficiency,
Preferably tissue intake swirl, adjusts cylinder-firing pressure and residual waste gas quantity, and to obtain engine power, moment of torsion, is discharged, combustion
The improvement of the comprehensive performances such as oily economy, comfort, so as to solve the property indices of the fixed port timing engine of tradition
Between the technical contradiction that mutually restricts.
The engine signal wheel sensor of the present invention realizes engine timing, improves engine performance and reduces discharge
Important sensor, which is operated using motor instead of engine, so as to fulfill signal wheel sensor according to reality
Border Operation Conditions work, and signal is exported to it using engine comprehensive diagnostic instrument and is acquired, the results showed that export signal
The signal output rule of sensor when meeting engine work.And the system has stronger demo function and configuration shows work(
Can, contribute to engineers and technicians to grasp sensor construction, operation principle and signal output
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other variations or changes in different ways.Here all embodiments can not be exhaustive.It is every to belong to this hair
Row of the obvious changes or variations that bright technical solution is extended out still in protection scope of the present invention.
Claims (3)
- A kind of 1. engine signal wheel sensor HWIL simulation tutoring system, it is characterised in that：Passed including motor, crank position Sensor, CMPS Camshaft Position Sensor, potentiometer controller, engine analyzer, power supply, supporting rack, signal panels one, signal panels 2nd, small pulley, big belt wheel, toothed belt, the motor are electrically connected with potentiometer controller, crankshaft position sensor, start respectively Machine analyzer is electrically connected with crankshaft position sensor, CMPS Camshaft Position Sensor respectively, power supply respectively with potentiometer controller, convex Shaft position sensor is taken turns to be electrically connected；Support frame as described above is sensed with signal panels one, signal panels two, small pulley, big belt wheel, crank position Device, CMPS Camshaft Position Sensor connection, toothed belt are connected with small pulley, big belt wheel respectively；The potentiometer controller passes through control Voltage output processed, controls motor speed, 0-3640 revs/min of speed adjustable range；Motor directly drives crankshaft position sensor to rotate, by Speed of crankshaft and camshaft speed are 2 during the engine real-world operation simulated：1 relation, so passing through bent axle position Put the small pulley of sensor, big belt wheel transmission drives, gearratio 2:1, which rotates drive camshaft-signal sensor, rotates, hair Motivational research instrument installation signal testing passage 1 and passage 2 are connected respectively to crankshaft position sensor and CMPS Camshaft Position Sensor Signal output part, respectively obtains the signal output characteristic of two sensors, by varying potentiometer controller output voltage, simulation Engine operating just obtains different running speeds, therefore can see the signal output characteristic in the case of different rotating speeds.
- A kind of 2. engine signal wheel sensor HWIL simulation tutoring system described in accordance with the claim 1, it is characterised in that： The crankshaft position sensor includes sensor lead, permanent magnet, air gap, double wedge, signal wheel, the sensor lead difference For signal wire, signal ground and shielding line, the signal wire is connected with the coil on permanent magnet, and the signal wheel is located at permanent magnetic Below iron, air gap is between signal wheel and permanent magnet, and the double wedge is in the edge of signal wheel.
- A kind of 3. engine signal wheel sensor HWIL simulation tutoring system described in accordance with the claim 1, it is characterised in that： The CMPS Camshaft Position Sensor includes impeller, signal wheel, permanent magnet, Hall element, air gap, the signal wheel and permanent magnetic Iron connects, and air gap is between signal wheel and Hall element, and impeller is on the edge of signal wheel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979301A (en) * | 2019-03-21 | 2019-07-05 | 北京邦曼科技有限公司 | A kind of method and apparatus for simulating internal combustion engine in-cylinder pressure |
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Application publication date: 20180420 |