CN106150704A - Digitized freq-variable electronic speed regulator - Google Patents
Digitized freq-variable electronic speed regulator Download PDFInfo
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- CN106150704A CN106150704A CN201510138735.5A CN201510138735A CN106150704A CN 106150704 A CN106150704 A CN 106150704A CN 201510138735 A CN201510138735 A CN 201510138735A CN 106150704 A CN106150704 A CN 106150704A
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Abstract
nullThe present invention is about a kind of digitized freq-variable electronic speed regulator，It is characterized in that this digitized freq-variable electronic speed regulator includes setting the frequency-variable controller of desired speed、Gather the speed probe of actual speed、Adjust the executor of actual speed，And connect the cable of above-mentioned each parts，Frequency-variable controller includes again the speed setting potentiometer setting desired speed、More satisfactory rotating speed and the comparator of actual speed、Calculate the rotating speed deviator of desired speed and the rotating speed departure of actual speed、The sine wave signal of conversion actual speed sensor，The EEPROM cell of the MCU of the digital signal input frequency-variable controller of square wave is converted to by amplifier，Adjustable dutycycle frequency signal is exported by the single-chip microcomputer of frequency-variable controller，With PID mode adjusting actuator，Thus reach engine speed dynamic equilibrium，Make the rotating speed of the size output ideal stability starting function to input according to throttle.The invention have the advantages that so that engine power system operation run safer, response speed faster, discreteness more preferably, stability more preferable.
Description
Technical field
The present invention relates to engine control system, particularly to a kind of diesel oil and petrol engine digitized freq-variable electronic speed regulator.
Background technology
The job demand of electromotor controls engine speed by speed regulator allows its steady operation on the rotating speed needed, it is referred to as speed regulator, the electromotor commonly used at present, its fuel feed amount is determined by the position of injection pump plunger, the position of injection pump plunger is controlled tooth bar by the plunger position in injection pump and regulates, speed regulator controls associating between tooth bar by tacho with plunger position, stablize the rotating speed of electromotor by the pattern of " negative feedback " and prevent driving, the principle of mechanical governor, it is by flying when block rotates produced centrifugal force and the balance of spring force to regulate rotating speed；When spring force one timing, rotating speed height when rotating the most very fast produced centrifugal force big, promote plunger position control tooth bar to make fuel delivery reduce, thus reduce the rotating speed of electromotor；Rotating speed is low, and it is little to fly produced centrifugal force when block rotates, and promotes plunger position to control tooth bar and makes fuel delivery increase, thus improve the rotating speed of electromotor, reaches to stablize dynamically；Strengthen or reduce throttle, being actually and change spring force by changing the size of camber of spring so that electromotor is issued to new balance at new rotating speed thus changes the rotating speed of electromotor.But mechanical governor still has shortcoming, i.e. speed governing is one-time-reach-place and has inertia, and the speed-regulating mode of this machinery needs spring and flies block system and adjust accurately with injection pump and coordinate, as coordinate the best time speed governing sensitivity decline and inertia increase, although appearance increases when adding, subtract throttle, slows down quickly, but fuel oil incomplete combustion, causes that oil consumption is higher, the discharge of black smoke, waste gas is serious；Simultaneously under the working condition of Diesel engine, spring force can not be changed after once setting, and needs fuel delivery to increase when loading increase, and only speedup reduces fuel delivery could increase.
Engine governor is the control device controlling engine stabilizer to run under the working speed of input, has on the market according to the difference of its implementation: mechanical governor, Hydraulic Adjustable Speed
Device, electrohydraulic governor, electron speed regulator, centrifugal and vacuum governor.For a long time, electromotor mainly uses mechanical type and mechanical hydraulic-pressure type and analog electron speed regulator.But these two kinds exist fatal unstability and discrete lines, requirement can not be met far away in many occasions.Simulation electronic speed regulator is computing circuit, servo circuit, feedback circuit composition,
The floating of discreteness and stability, the circuit that so many discrete devices are constituted is there is, as long as a device occurs that Parameters variation just can affect whole Circuits System, if multiple element occurs that parameter variation problems is more serious during feedback oil mass.
The present invention then provides a kind of digitized variable-frequency governor to solve the problems referred to above.
Summary of the invention
null1、A kind of digitized freq-variable electronic speed regulator，It is characterized in that this digitized freq-variable electronic speed regulator includes setting the frequency-variable controller of desired speed、Gather the speed probe of actual speed、Adjust the executor of actual speed，And connect the cable of above-mentioned each parts，Frequency-variable controller includes again the speed setting potentiometer setting desired speed、More satisfactory rotating speed and the comparator of actual speed、Calculate the rotating speed deviator of desired speed and the rotating speed departure of actual speed、The sine wave signal of conversion actual speed sensor，The EEPROM cell of the MCU of the digital signal input frequency-variable controller of square wave is converted to by amplifier，Adjustable dutycycle frequency signal is exported by the single-chip microcomputer of frequency-variable controller，With PID mode adjusting actuator，Thus reach engine speed dynamic equilibrium，Make the rotating speed of the size output ideal stability starting function to input according to throttle.
2, improving as a kind of, executor is high speed electromagnetic executor, and for armored direct current ratio frequency conversion adjustable solenoid, its oiling direction driving force controls current in proportion in coil windings, subtracts oil direction reset force and is produced by back-moving spring.
3, improving as a kind of, speed probe is magnetoelectric tachometric transducer, and internal structure is made up of magnetic conduction probe, coil, magnet steel, and the magnetic force that magnet steel produces forms the magnetic line of force of Guan Bi by magnetic conduction probe, and coil is wound around.On magnetic conduction is popped one's head in.Compared with prior art, the invention have the advantages that so that dynamical system operation run safer, response speed faster, discreteness more preferably, stability more preferable.
【Accompanying drawing explanation】
Fig. 1 is the system framework figure of a kind of embodiment of invention digitized freq-variable electronic speed regulator.
【Specific implementation method】
Describe the detailed description of the invention of the present invention below in conjunction with the accompanying drawings in detail.
Digitized freq-variable electronic speed regulator of the present invention is the accurate control device controlling engine stabilizer to run under the working speed set; difference according to its implementation can be divided into mechanical governor, hydrodynamic governor, electrohydraulic governor, electron speed regulator and centrifugal and vacuum governor etc.; on control principle; various speed regulators all have speed setting, test the speed, compare, computing, driving output, executive component, adjustment factor set, protect or mechanism or parts, each mechanism or the parts such as restriction form a closed-loop control system through efficient combination.
Digitized freq-variable electronic speed regulator of the present invention is by the control of frequency conversion rotating speed, executor, the big module of speed probe three and connects the shielded cable etc. of above-mentioned parts and forms.The desired speed of electromotor is set by the speed setting digital encoder in the control of frequency conversion rotating speed, the actual speed of electromotor is by being installed on the magnetoelectric tachometric transducer collection at flywheel ring gear position, and its output signal is the AC sine wave signal that frequency is proportional to engine speed；This signal is converted to digital square-wave through modulus signal transducer, obtains rotating speed departure with speed setting value after comparing；This departure is through PID actuator (proportional-integral derivative controller, by proportional unit P, integral unit I and differentiation element D composition) change into PWM(Pulse-Width Modulation after operation amplifier, digital pulse width modulation) current control mode, to executor's output driving current, executor drive electric current effect under compress contained spring change doing linear motion output, executor is armored direct current proportion electro-magnet, it refuels, and direction driving force is interior with coil windings controls current in proportion, subtract oil direction reset force to be produced by back-moving spring, executor's pull bar acting engine speed adjusting lever, thus control electromotor stable operation under required rotating speed.
Digitized variable-frequency governor operation principle of the present invention is: the actual engine speed that input service rotating speed and detecting element record is compared by speed regulator, and result of the comparison (i.e. deviation) comprises two parts information: deviation " positive and negative " information and deviation amplitude information.The effect of deviation " positive and negative " information is: if actual engine speed is more than the working speed of input, deviation is " bearing ", and output " negative sense " is controlled by speed regulator, reduces fuel quantity by executive component, and engine speed decreases；If actual engine speed is less than the working speed set, deviation is " just ", and output " forward " is controlled by speed regulator, increases fuel quantity by executive component, and engine speed increases.The effect of deviation amplitude information is: deviation amplitude is through MCU(Micro Controlling Unit, microprocessor or microcontroller) process, change frequency, determine the size of output controlled quentity controlled variable, the number of fuel quantity is i.e. increased or decreased, in the case of deviation amplitude is certain, the size of output controlled quentity controlled variable must be suitable, excessive or too small engine speed all can be caused unstable or do not reach adjusting speed accuracy requirement.According to the difference of speed regulator kind, the operation method of process has its distinctive Physical realization.
Mechanical governor: realized simple " proportion adjustment " fortune (P computing) by the change of mechanical lever fulcrum.
Hydrodynamic governor: realized (PID computings) such as " proportion adjustment ", " integral adjustment " and " differential regulation " by the change of mechanical lever fulcrum, the oil cylinder with throttling action and valve.
Simulation electronic speed regulator: realized the Based Intelligent Control of PID computing or more complicated by analog circuit or computer software.
Please join Fig. 1, be a kind of novel device realizing electrodeless variable-speed regulation engine speed for digitized freq-variable electronic speed regulator of the present invention.System framework Fig. 1.The stripping of this digitized freq-variable electronic speed regulator includes with lower module:
Voltage acquisition unit 111, frequency converter control unit 112, PID regulator 113, electromagnetic actuator 114, speed probe 115, AD conversion unit 116, parameter setting module 117, overspeed protection 118.
nullSpeed regulating method is as follows: start gas pedal 11，Distance according to gas pedal compression，Voltage acquisition unit 111 obtains the voltage signal of a 0-5V，This signal is delivered to frequency converter control unit 112 by voltage acquisition unit 111，This signal is converted into the output frequency signal of correspondence by frequency converter control unit 112 by software algorithm，Output frequency signal is transported to PID regulator 113，This signal passing ratio is regulated by PID regulator 113、Integral adjustment and differential regulation output control electromagnetic actuator 114，The electromagnetic actuator 114 size by catch bar extension and contraction control electromotor 12 oil pump oil mass，Thus obtain required desired speed，Driving engine stabilizer works，When needs change rotating speed，Speed probe 115 detects engine flywheel rotating speed and changes，Produce a sine wave signal changed，Sine wave signal after speed probe 115 will change sends AD conversion unit 116 to，Sine wave signal is converted to the digital signal of square wave to frequency converter control unit 112 by AD conversion unit 116，This signal is converted into the output frequency signal of correspondence by frequency converter control unit 112 by software algorithm，Output frequency signal is transported to PID regulator 113，This signal passing ratio is regulated by PID regulator 113、Integral adjustment and differential regulation output control electromagnetic actuator 114，The electromagnetic actuator 114 size by catch bar extension and contraction control electromotor 12 oil pump oil mass，Thus obtain the desired speed after required change，So，Whole speed regulation process forms a closed loop system，Change throttle size at any time，Electromotor just can be made to export desired speed.
Vary in size according to the engine power provisioned in digitized freq-variable electronic speed regulator; it is different that overspeed protection 118 parameter is set; arrange 117 by parameter and corresponding electromotor maximum speed is set; when a variety of causes racing of the engine is; digitized freq-variable electronic speed regulator starts overspeed protection automatically; make engine stop work, so guarantee that electromotor runs safety.
Use the present invention, it will have so that dynamical system operation runs safer, response speed faster, discreteness more preferably, the preferable feature of stability.
The foregoing is only the better embodiment of the present invention; protection scope of the present invention is not limited with above-mentioned embodiment; in every case those of ordinary skill in the art modify or change according to the equivalence that disclosed content is made, and all should include in the protection domain described in claims.
Claims (3)
- null1. a digitized freq-variable electronic speed regulator，It is characterized in that this digitized freq-variable electronic speed regulator includes setting the frequency-variable controller of desired speed、Gather the speed probe of actual speed、Adjust the executor of actual speed，And connect the cable of above-mentioned each parts，Frequency-variable controller includes again the speed setting potentiometer setting desired speed、More satisfactory rotating speed and the comparator of actual speed、Calculate the rotating speed deviator of desired speed and the rotating speed departure of actual speed、The sine wave signal of conversion actual speed sensor，The EEPROM cell of the MCU of the digital signal input frequency-variable controller of square wave is converted to by amplifier，Adjustable dutycycle frequency signal is exported by the single-chip microcomputer of frequency-variable controller，With PID mode adjusting actuator，Thus reach engine speed dynamic equilibrium，Make the rotating speed of the size output ideal stability starting function to input according to throttle.
- 2. according to the digitized freq-variable electronic speed regulator described in claim 1, it is characterized in that: executor is high speed electromagnetic executor, for armored DC frequency-changing adjustable solenoid, it refuels, and direction driving force is interior with coil windings controls current in proportion, subtracts oil direction reset force and is produced by back-moving spring.
- 3. according to the digitized freq-variable electronic speed regulator described in claim 1, it is characterized in that: speed probe is electricity magnetoelectric tachometric transducer, internal structure is made up of magnetic conduction probe, coil, magnet steel, the magnetic force that magnet steel produces forms the magnetic line of force of Guan Bi by magnetic conduction probe, and coil is wrapped on magnetic conduction probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510138735.5A CN106150704A (en) | 2015-03-27 | 2015-03-27 | Digitized freq-variable electronic speed regulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510138735.5A CN106150704A (en) | 2015-03-27 | 2015-03-27 | Digitized freq-variable electronic speed regulator |
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| CN106150704A true CN106150704A (en) | 2016-11-23 |
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| CN201510138735.5A Pending CN106150704A (en) | 2015-03-27 | 2015-03-27 | Digitized freq-variable electronic speed regulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332051A (en) * | 2019-08-27 | 2019-10-15 | 广州市能动机电设备有限公司 | A kind of Self-tuning System engine digital intelligent speed regulation device |
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- 2015-03-27 CN CN201510138735.5A patent/CN106150704A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332051A (en) * | 2019-08-27 | 2019-10-15 | 广州市能动机电设备有限公司 | A kind of Self-tuning System engine digital intelligent speed regulation device |
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Application publication date: 20161123 |
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| WD01 | Invention patent application deemed withdrawn after publication |