CN105756787A - Biogas engine control system - Google Patents
Biogas engine control system Download PDFInfo
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- CN105756787A CN105756787A CN201610181530.XA CN201610181530A CN105756787A CN 105756787 A CN105756787 A CN 105756787A CN 201610181530 A CN201610181530 A CN 201610181530A CN 105756787 A CN105756787 A CN 105756787A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/025—Failure diagnosis or prevention; Safety measures; Testing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
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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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention discloses a biogas engine control system which is composed of a power supply, a valve position sensor, a gas inlet pressure/temperature sensor, a cooling liquid temperature sensor, a knocking sensor, a crankshaft rotating speed sensor, an oxygen sensor, an analog signal processing circuit, a digital signal processing circuit, an electronic control unit module, a fuel gas injection valve drive circuit, a gas injection valve, a spark plug ignition drive circuit, a spark plug and a diagnostic monitoring bus. Compared with the prior art, the system disclosed by the invention adopts an advanced digital control manufacturing technology, integrates a control and protection technology, a synchronous grid-connected control technology, active and reactive load control technologies and the like, is convenient to operate, easy in programming and safe and reliable in application and has a popularization and application value.
Description
Technical field
The present invention relates to a kind of mechanical engine, particularly relate to a kind of methane fuelled engine and control system.
Background technology
Under the Present Global energy and environment severe conditions, using new and high technology, reproducible biomass energy is converted into the high-quality gas of cleaning and the liquid fuel alternative energy source as Fossil fuel, and it is applied to the aspect such as electric power, transportation, by the attention of countries in the world.The key equipment that methane fuelled engine is changed as biogas energy in biogas power generation technology field, its at home and abroad state-of-the-art, technical bottleneck be mainly reflected in that methane fuelled engine exists be short of power, the reliable sex chromosome mosaicism such as gas consumption is high, emission performance difference and starting difficulty, make troubles to user, be restriction and the technical bottleneck affecting marsh gas power generation industry development process.
Summary of the invention
The purpose of the present invention is that provides a kind of methane fuelled engine to control system to solve the problems referred to above.
The present invention is achieved through the following technical solutions above-mentioned purpose:
nullThe present invention is by power supply、Valve position sensor、Admission pressure/temperature sensor、Cooling-water temperature transmitter、Detonation sensor、Crankshaft rotational speed sensor、Oxygen sensor、Analog signal processing circuit、Digital signal processing circuit、Electronic control unit module、Combustion gas injection valve-driving circuit、Gas injection air valve、Plug ignition drive circuit、Spark plug and diagnosis controlling bus composition，Described valve position sensor、Described admission pressure/temperature sensor、Described cooling-water temperature transmitter and described detonation sensor are all connected with the signal input part of described analog signal processing circuit，Described crankshaft rotational speed sensor and described oxygen sensor are all connected with the signal input part of described digital signal processing circuit，The signal output part of described analog signal processing circuit and described digital signal processing circuit is all connected with the signal input part of described electronic control unit module，Described power supply is connected with described electronic control unit module，The outfan of described electronic control unit module respectively with described combustion gas injection valve-driving circuit、Plug ignition drive circuit and described diagnosis controlling bus connect，The driving control output end of described combustion gas injection valve-driving circuit is connected with described gas injection air valve，Described plug ignition drive circuit is connected with described spark plug.
Further, described electronic control unit module is made up of main control chip, reset circuit and embedded OS.
The beneficial effects of the present invention is:
The present invention is that a kind of methane fuelled engine controls system; compared with prior art; present invention employs the digital control manufacturing technology of advanced person; integrated control resist technology, synchronize cutting-in control technology, meritorious and reactive load control technology etc.; it is easy to operate, it is simple and easy to program; application safety is reliable, has the value promoted the use of.
Accompanying drawing explanation
Fig. 1 is the population structure theory diagram of the present invention；
Fig. 2 is the signal processing circuit of the crankshaft rotational speed sensor of the present invention；
Fig. 3 is the circuit structure schematic diagram of the TPS of the present invention；
The oxygen sensor signal that Fig. 4 is the present invention processes circuit；
Fig. 5 is the circuit structure schematic diagram of the combustion gas injection valve-driving circuit of the present invention；
Fig. 6 is the circuit structure schematic diagram of the plug ignition drive circuit of the present invention；
Fig. 7 is the fuel gas injection fuzzy feedback control system figure of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
nullAs shown in Figure 1: the present invention is by power supply、Valve position sensor、Admission pressure/temperature sensor、Cooling-water temperature transmitter、Detonation sensor、Crankshaft rotational speed sensor、Oxygen sensor、Analog signal processing circuit、Digital signal processing circuit、Electronic control unit module、Combustion gas injection valve-driving circuit、Gas injection air valve、Plug ignition drive circuit、Spark plug and diagnosis controlling bus composition，Described valve position sensor、Described admission pressure/temperature sensor、Described cooling-water temperature transmitter and described detonation sensor are all connected with the signal input part of described analog signal processing circuit，Described crankshaft rotational speed sensor and described oxygen sensor are all connected with the signal input part of described digital signal processing circuit，The signal output part of described analog signal processing circuit and described digital signal processing circuit is all connected with the signal input part of described electronic control unit module，Described power supply is connected with described electronic control unit module，The outfan of described electronic control unit module respectively with described combustion gas injection valve-driving circuit、Plug ignition drive circuit and described diagnosis controlling bus connect，The driving control output end of described combustion gas injection valve-driving circuit is connected with described gas injection air valve，Described plug ignition drive circuit is connected with described spark plug.
Further, described electronic control unit module is made up of main control chip, reset circuit and embedded OS.
Speed probe is used for measuring speed of crankshaft signal, and ECU determines crankshaft timing position and engine rotational speed signal by gathering hypodontia signal, it is determined that fuel gas injection moment, injection pulse width and ignition timing moment control signal.Methane fuelled engine 58 tooth signal teeth wheel disc, the structure of these signal panels is within one week, to be uniformly distributed 60 teeth, the angle of each tooth is 60, remove two of which tooth, this hypodontia is as engine timing labelling tooth, judge electromotor present position, provide basis reference for the angle of electromotor snifting valve jet timing and plug ignition timing simultaneously.When engine crankshaft rotation makes 58 tooth signal gear motion, electromagnetic type speed probe front end and the change of signal panels inter-lobe clearance generating period, according to electromagnetic induction principle, speed probe will produce cycle alternating-current voltage, its signal is as shown below, ECU can according to this signal calculate the number of teeth that gear turns over and, the position of cylinder tooth, then determine according to the length of hypodontia time that crank position and engine speed, its amplitude and frequency change along with the size of engine speed and change.As shown in Figure 2: diode D1 and D2 is for limiting input signal amplitude, within comparator U1 and phase inverter U2 converts input class sinusoidal signal square-wave pulse signal to and its amplitude is limited to SV, this signal can be accurately identified by ECU, and the engine rotational speed signal of output is as follows.The rising edge of sensor signal is monitored by CPU timer/counter, judges that angle that bent axle turns over the position according to hypodontia determine jet timing and ignition timing moment.
As shown in Figure 3: in each transducing signal of methane fuelled engine except engine speed transducing signal, electronic throttle position sensor signal is also the important parameter embodying working conditions change, the linear relationship of engine load sensor output voltage and throttle opening, throttle opening scope is 0 one 900, throttle opening amount signal voltage range is 0.4 1 3V, along with the increase of throttle opening, output voltage linearly increases.And design engine load sensor signal processing circuit and mainly consider its filtering, circuit design uses a RC wave filter.
Additionally, the signal that cooling-water temperature transmitter, intake air temperature sensor etc. export is also similar to that engine load sensor, analog signal voltage ranges for O～5V.Degree sensor is generally adopted negative temperature coefficient resister as sensing element, and namely along with the rising of temperature, the resistance of sensing element reduces on the contrary, and therefore this kind of sensor signal processing circuit is also designed to circuit diagram shown in figure below.Convert above-mentioned analogue signal to digital signal by A/D change-over circuit, be transmitted further to ECU.Methane fuelled engine controls system and belongs to closed-loop control system, oxygen sensor is the important sensing element of electromotor feedback control, the control tool of snifting valve jet amount is had a significant impact by it, therefore the signal processing circuit design of oxygen sensor should be given sufficient attention, and adopts the switching mode oxygen sensor using comparative maturity at present herein.Output characteristics according to oxygen sensor, when its output voltage is higher than time O.5V, ECU is judged to rich mixture, is then judged to lean mixture on the contrary.
As shown in Figure 4: resistance R6 and R7 forms bleeder circuit, the hair pressure of its output compares voltage as the benchmark of comparator U3, owing to the working environment of oxygen sensor is more severe, owing to mile circuit anti-interference herein is required higher, photoelectricity misfortune clutch U4 and RC wave filter (being made up of R8 and C3) is added, the signal after finally bringing disaster upon clutch stitch 6 output processing from photoelectricity when designing circuit.High level is rich mixture, and low level is lean mixture, and this signal is connected with the I/O interface of ECU.
As shown in Figure 5: gas injection air valve is accurately controlled to be by the ECU fuel gas injection signal sent according to engine operating condition, this signal is Low level effective, fuel gas injection drive circuit runs into low level and just drives snifting valve to open, and runs into high level snifting valve and closes, adopts duplex feeding circuit, providing, " peak is " during mode current, article two, power supply circuits work simultaneously, when needs " hold " are during mode current, and a power supply circuits job, another quits work, to keep reduced-current and stable.In figure, IN is that ECU exports fuel gas injection signal output part, and when electromagnetic valve is in closure state, IN is output as low level, Q2 will not open when IN is low level, one low level of now U1 the 2nd foot output, Q3 and Q1 is without opening, now no current in gas injection air valve, will not open.nullWhen gas injection air valve is opened，IN can export a high level，Q2 can open when IN is high level，At this moment U1 the 2nd foot can export high level，Open Q3 and Q1 simultaneously，After Q1 opens，Gas injection Air Valve Control end will produce a voltage difference (about 12}13V)，Gas injection air valve electric current can start to increase，Passed to the 4th foot of U1 by resistance R8 after the source voltage of Q2 reaches 0.4V，At this moment U1 the 2nd foot output low level will cause that Q1 closes，Gas injection air valve electric current relies on D1 reversely to continue and stays，In gas injection air valve, electric current can slowly reduce，The source voltage causing Q2 reduces，When U1 the 4th foot voltage drops to 0.1V (now owing to Q3 is not turned on，R4 connects this one end or the high level of Q3，So Q2 source voltage also will lower than 0.1V，At this moment U1 the 2nd foot can export a high level and open Q1 and Q3，After opening Q3, R4 and Q3 link voltage is low level，At this moment U1 the 4th foot voltage can lower than O.1V，After opening Q1，Gas injection air valve electric current can slowly increase，The increase of electric current makes Q2 source voltage increase，When the increase of voltage makes U1 the 4th foot voltage more than time O.1V，U1 the 2nd foot will in one low level of output，The closed loop control of electric current makes the electric current of gas injection air valve change in suitable scope，Thus realizing " peakandhold " to drive current-mode，Gas injection air valve is driven to carry out effective jet，OUT1 and OUT2 connects two control ends of snifting valve respectively.
As shown in Figure 6: the accurately control for spark plug is to export control signal to ignition drive circuit by ECU, thus the break-make of control point fire coil armature winding, the secondary windings making ignition coil produces high voltage, spark plug is made to produce high-energy spark disruptive spark plug front space, the gaseous mixture in some gas cylinder.The voltage ratio of the ignition signal that ECU sends is relatively low, it is impossible to directly disruptive spark plug.
When ECU sends high level ignition signal, becoming low level and enter photoelectricity misfortune clutch after inverted device, photoelectricity misfortune clutch filters interference signal, exports high-level control signal from 4 ports, when audion Q1 turns on, makes primary coil enter charged state；Becoming low level when ECU sends ignition signal, namely charged state stops, now Q1 cut-off, ignition coil primary coil power-off, and the voltage at the moment secondary coil of power-off raises rapidly, makes spark plug puncture gap, it is achieved fuel gas mixture is lighted a fire.
The introduction of control method
Control according to there being feedback-less can be divided into open loop and closed loop control two ways at electromotor.Control parameter under each for electromotor operating mode is stored in computer by opened loop control in advance, when electromotor runs, computer inputs signal according to speed probe, intake manifold pressure sensor etc., judge the operating condition of electromotor, calculate the controlled quentity controlled variable needed for electromotor, therefore, the advantage of opened loop control is to be only limited by the impact of engine operation condition Parameters variation, and by the control law work set in advance in a computer, its simple in construction, response are soon, but opened loop control is absent from the feedback of controlled volume, it is impossible to well compensate interference, have some limitations；Relative to opened loop control, the many feedback elements of closed loop control, the signal of feedback transducer flows to control unit, as the reference of Correction and Control amount, system has certain corrective action.But to adopt closed loop control, it is necessary to solving two important problems: one is the stability of system, two is feedback transducer sex chromosome mosaicism time response.In the search approximate procedure of parameters optimization, it is easy to unstable reforming phenomena occurs, it is achieved the not purpose of optimal control.And owing to the time response of feedback transducer is oversize, control system cannot be followed the tracks of the change of engine operating conditions in time and make correct reaction.
Electromotor is a typical nonlinear system, and its each parameter has the feature of time variation, dynamic with system operating.When the operating condition of electromotor changes in time, intermediate variable (fuel gas supply amount and ignition advance angle) and output (engine torque, exhaust emissions CO, HC and NOx, fuel consumption) also change；On the other hand, consider that electromotor controls to meet control stability requirement, take into account the actual effect of control again, and in conjunction with the work characteristics of electromotor and working characteristics, methane fuelled engine Controlling model is set up by GT-power and Simulink coupling, with rated engine speed for the operating condition of 1400r/min, use (1) based on the igniting of MAP and fuel gas injection feed forward control method；(2) based on the PID/feedback control method of the igniting of MAP and fuel gas injection feedforward and air-fuel ratio；(3) based on the air-fuel ratio feedback control method of the igniting of MAP with fuel gas injection feedforward and fuzzy, three kinds of control method relative analyses are thus selecting good control method:.
By three kinds of control methods of relative analysis, thus selecting good control method----based on the air-fuel ratio feedback control method of igniting and fuel gas injection feedforward and fuzzy of MAP.
1. fuel gas injection fuzzy feedback-control structure
Methane fuelled engine operates under many variable working condition, increases air-fuel ratio fuzzy feedback controller, it is possible to achieve the rectification disturbed to external world and compensation ability, improve air-fuel ration control precision on MAP feedovers basis.The air-fuel ratio feedback control method of the feedforward of the igniting of MAP and fuel gas injection and fuzzy is using the deviation of excess air coefficient and deviation variation rate as the input of fuzzy feedback-control device, using fuel gas injection correction pulsewidth as output, composition two dimension fuzzy control structure.
2. the foundation of the obfuscation of precise volume and linguistic variable
Obfuscation is the thinking characteristic that the judgement of things is often continued to use normal distribution according to people, and the membership function of fuzzy subset adopts the Gaussian function meeting normal distribution.According to methane fuelled engine operation principle, the basic domain of the definition deviation e of excess air coefficient, deviation variation rate ec and fuel gas injection pulsewidth u is [-1,1], [-20,20] and [-700,700].
The input of fuzzy controller, output linguistic variable design general describe with " honest ", " just little " " zero ", " negative little ", " negative big ", linguistic variable is describe domain, can not represent actual value.In order to make the flexible careful property of control rule, take into account again simple requirement, select " honest " CPB), " center " CPM), " just little " CPS), " zero " C2), " negative little " CNS), " in negative " CNM) and " bearing greatly " CNB) 7 linguistic variables describe input and the output of controller.Therefore, the excess air coefficient deviation e shown with language argument table, the fuzzy subset of excess air coefficient deviation variation rate ec and fuel gas injection correction pulsewidth u is as follows respectively:
The fuzzy subset of N: [NB, NM, NS, Z, PS, PM, PB]
The fuzzy subset of M: [NB, NM, NS, Z, PS, PM, PB]
The fuzzy subset of U: [NB, NM, NS, Z, PS, PM, PB]
The domain definition of E, EC and U is as follows:
The domain of E :-6 ,-5 ,-4 ,-3 ,-2,1,0}+1 ,+2 ,+3}+4 ,+5}+6}
The domain of EC :-6 ,-5 ,-4 ,-3 ,-2 ,-1,0}+1 ,+2 ,+3}+4 ,+5}+6}
The domain of U :-7 ,-6 ,-5 ,-4 ,-3 ,-2,1,0}+1 ,+2 ,+3}+4 ,+5}+6}+7}
According to quantitative formula, quantizing factor respectively ke=6, kec=0.3 and ku=100 of the deviation of excess air coefficient, deviation variation rate and fuel gas injection pulsewidth can be obtained by the domain of the basic domain of above-mentioned input/output variable Yu linguistic variable.
Gaussian function as membership function is represented by:
Wherein, a value is equal to each element in fuzzy domain, and therefore, as long as determining that b value just can determine that the degree of membership of each element in domain, b value is the shape factor of influence of membership function N (x), and the impact controlling effect is bigger.It is illustrated in figure 7 fuel gas injection fuzzy feedback control system figure
3. the foundation of fuel gas injection fuzzy feedback-control rule
Operation principle according to methane fuelled engine, summing up experience obtains engine gas injection fuzzy control rule, and detailed fuzzy control regulation is as shown in the table.
In fuzzy control rule table, each fuzzy condition statement is all a fuzzy control rule, meets the form of " A and B be C then " (i.e. IfAandBthenC), thus the fuzzy relation R=of correspondence (A × C) (B × C).Such as: in fuzzy control rule table, the 1st article of determined fuzzy relation of statement is as follows:
R1=(NBN×NBU)*(NBM×NBU)
In like manner, when can obtain i=1,2..n, fuzzy relation Ri, n are the statement number of corresponding fuzzy condition statement.
Consider the "or" relation between these fuzzy condition statements, then the total fuzzy relation controlling rule of the whole system corresponding to fuel gas injection fuzzy feedback-control regulation table is:
Then, the design of FUZZY ALGORITHMS FOR CONTROL is through what the design of total fuzzy relation R realized.
Fuel gas injection fuzzy feedback-control regulation table
4. fuzzy reasoning
After drawing the fuzzy relation R of reaction controlling rule, it is possible to release the fuzzy set Ui on output language variable field according to composition rule:
Ui=(Ei×ECi)*R
(i=1,2,3 ..., n), Ui reflects the fuzzy subset of controlled quentity controlled variable change.Above-mentioned fuzzy reasoning, it is also possible to completed by another method: given input fuzzy subset E, EC and control in rule that every fuzzy statement determines fuzzy relation Ri=1,2,3 ..., n), then output fuzzy subset can with under represent:
5. ambiguity solution
Adopt centroid method to carry out fuzzy judgment, controlled quentity controlled variable is become precise volume from fuzzy quantity, and transforms to basic domain from universe of fuzzy sets, then be multiplied by k.Just obtain the fuel gas injection pulsewidth correction needing to give.
3, gas ignition control method
For spark-ignition engine, ignition advance angle is to affect the very important factor of engine performance, generally required Optimum spark advance angle is to obtain maximum effective power, in order to realize this target, ignition advance angle is carried out closed loop control adjustment by the pressure being generally adopted detonation sensor detection cylinder.But, for engine system complicated, non-linear, accurately measuring engine cylinder pressure difficulty very big, the performance requirement of pressure transducer is significantly high, and research shows [[62]: the poor durability of sensor and cost height constrain its development and application to a certain extent.
Consider that closed loop control has difficulties and sensor poor durability, high in cost of production problem in feedback parameter collection, this problem mode of ignition advance angle opened loop control, and considered the ignition advance angle impact on the big performance of methane fuelled engine three.For the raising that use detonation sensor main target is the power performance realizing electromotor, combustion gas economy and discharge performance are not taken into account, when electromotor obtains maximum moment, combustion gas economy and discharge performance are not best, then need to average out between three, therefore the Optimum spark advance angle MAP meeting engine performance under each operating condition of electromotor is obtained, it is necessary to carry out substantial amounts of data test and verification, produce the time long.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within the claimed scope of the invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (2)
- null1. a methane fuelled engine controls system，It is characterized in that: by power supply、Valve position sensor、Admission pressure/temperature sensor、Cooling-water temperature transmitter、Detonation sensor、Crankshaft rotational speed sensor、Oxygen sensor、Analog signal processing circuit、Digital signal processing circuit、Electronic control unit module、Combustion gas injection valve-driving circuit、Gas injection air valve、Plug ignition drive circuit、Spark plug and diagnosis controlling bus composition，Described valve position sensor、Described admission pressure/temperature sensor、Described cooling-water temperature transmitter and described detonation sensor are all connected with the signal input part of described analog signal processing circuit，Described crankshaft rotational speed sensor and described oxygen sensor are all connected with the signal input part of described digital signal processing circuit，The signal output part of described analog signal processing circuit and described digital signal processing circuit is all connected with the signal input part of described electronic control unit module，Described power supply is connected with described electronic control unit module，The outfan of described electronic control unit module respectively with described combustion gas injection valve-driving circuit、Plug ignition drive circuit and described diagnosis controlling bus connect，The driving control output end of described combustion gas injection valve-driving circuit is connected with described gas injection air valve，Described plug ignition drive circuit is connected with described spark plug.
- 2. methane fuelled engine according to claim 1 controls system, it is characterised in that: described electronic control unit module is made up of main control chip, reset circuit and embedded OS.
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| CN109184933A (en) * | 2018-09-10 | 2019-01-11 | 山东交通学院 | The collaboration optimal control method and system of biogas internal combustion engine generator group |
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