CN110410225A - For the engine fuel control system and control method of unstable ingredient gas source - Google Patents
For the engine fuel control system and control method of unstable ingredient gas source Download PDFInfo
- Publication number
- CN110410225A CN110410225A CN201910748623.XA CN201910748623A CN110410225A CN 110410225 A CN110410225 A CN 110410225A CN 201910748623 A CN201910748623 A CN 201910748623A CN 110410225 A CN110410225 A CN 110410225A
- Authority
- CN
- China
- Prior art keywords
- gas
- fuel
- air
- engine
- fuel ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 115
- 239000004615 ingredient Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 93
- 239000000567 combustion gas Substances 0.000 claims abstract description 72
- 239000002737 fuel gas Substances 0.000 claims abstract description 62
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000009711 regulatory function Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 11
- 230000008901 benefit Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008450 motivation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
- F02D19/021—Control of components of the fuel supply system
- F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
-
- 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
-
- 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
- F02D19/026—Measuring or estimating parameters related to the fuel supply system
- F02D19/027—Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- 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
Abstract
The invention discloses a kind of engine fuel control system and control method for unstable ingredient gas source, control system includes proportional mixer, engine electric-controlled unit, crankshaft rotational speed sensor, electronic throttle, air inlet temperature/pressure sensor and lambda sensor；The combustion gas bypass line comprising fuel gas temperature pressure sensor and combustion gas by-passing valve is provided between the fuel gas inlet end of proportional mixer and mixed gas outlet end.Control method are as follows: initialization calibration is carried out to the initial air-fuel ratio under different operating conditions；It operates normally, based on the difference of actual air-fuel ratio and initial air-fuel ratio under current working, valve opening is bypassed by PID control regulating gas and carries out air-fuel ratio closed-loop control；Aperture is modified according to fuel gas temperature pressure signal simultaneously；Until actual air-fuel ratio is approximately equal to the adjusting of initial air-fuel ratio stop opening.The present invention can do targetedly self adaptive control according to unstable ingredient gas source, guarantee that engine operates normally and power stability exports.
Description
Technical field
The invention belongs to engine fuel control technology fields, more particularly, to a kind of hair for unstable ingredient gas source
Motivation Fuel Control System and control method.
Background technique
Natural gas main component is CH4, is high-quality clean fuel, the natural gas of exploitation by refine purification mainly with CNG,
LNG is that principal mode carries out storage utilization, is partially widely used in gas engine product.But in industrial circle, have very
More special gas sources, main component is based on CH4 and contains some other gaseous impurity, such as oil field gas, rubbish landfill gas, natural pond
Gas etc..The characteristics of this kind of gas source is that gas component is unstable, and each area also differs greatly, and gas component is with environment temperature
Change and change, environment temperature is high under normal conditions, and CH4 concentration is high in gas source, and environment temperature is low, and CH4 concentration reduces.Engine
Using the gas source that gas component is stable, it can be easier to control the air-fuel ratio of combustion gas, power output is also relatively stable.If using non-steady
Determine the gas source (gas source of gas component variation) of ingredient, current combustion control system is difficult to carry out effective air-fuel ratio control,
It is unstable often to will lead to engine start difficulty, power；Therefore it needs often to be adjusted engine data or mixer.Number
According to or the adjustment of mixer need engine to carry out under shutdown status, adjustment process will affect the actual use of client, a
It will lead to user in other situation to stop production due to power-off, often bring economic loss to user.
Summary of the invention
It is intended to overcome above-mentioned the deficiencies in the prior art, first technical problem solved by the invention is to propose
A kind of engine fuel control system for unstable ingredient gas source, can do targetedly according to the different gas source of client
Self adaptive control guarantees that the normal operation of engine and stablizing for power export.
As the same technical concept, second technical problem solved by the invention is to propose one kind for non-steady
Determine the engine fuel control method of ingredient gas source.
The present invention solves technical solution used by above-mentioned first technical problem: one kind is for unstable ingredient gas source
Engine fuel control system, including proportional mixer, engine electric-controlled unit, the crankshaft for monitoring engine speed
Speed probe enters the electronic throttle of mixed gas flow in the air inlet pipe, for monitoring the air inlet pipe for controlling
The air inlet temperature/pressure sensor of interior mixture temperature pressure and lambda sensor for monitoring oxygen concentration in the exhaust pipe；
The crankshaft rotational speed sensor, the electronic throttle, the air inlet temperature/pressure sensor and the lambda sensor are and institute
State engine electric-controlled unit electrical connection；
Combustion gas bypass line is provided between the fuel gas inlet end of the proportional mixer and mixed gas outlet end, it is described
It is provided with the fuel gas temperature pressure sensor for monitoring fuel gas temperature pressure on combustion gas bypass line and enters institute for controlling
State the combustion gas by-passing valve of gas flow in combustion gas bypass line.
Further, the fuel gas temperature pressure sensor is located at the combustion gas bypass line of combustion gas by-passing valve upstream
On.
The present invention solves technical solution used by above-mentioned second technical problem: one kind is for unstable ingredient gas source
Engine fuel control method, based on the engine fuel control system for unstable ingredient gas source, the control
Method processed includes:
S1, engine initialization calibration, prestore in the engine electric-controlled unit under gas component, different operating conditions
Combustion gas by-passing valve basis aperture k0 under benchmark air-fuel ratio λ 0 and different operating condition；Initial air-fuel ratio λ 2 under different operating conditions is carried out
Initialization calibration；
S2, the engine operate normally, and the engine electric-controlled unit acquisition electronic throttle aperture, engine turn
Speed, oxygen concentration and intake air temperature pressure data, and the data of acquisition are analyzed and processed, obtain the practical sky under current working
Combustion is than λ 1；
The initial air-fuel ratio λ 2 of S3, the engine electric-controlled unit based on actual air-fuel ratio λ 1 and calibration under current working
Difference, the aperture of the combustion gas by-passing valve is adjusted by PID control to carry out air-fuel ratio closed-loop control；Simultaneously according to the combustion
The fuel gas temperature pressure signal of gas temperature and pressure transmitter transmission is modified the aperture of presently described combustion gas by-passing valve；
S4, until actual air-fuel ratio λ 1 and calibration initial air-fuel ratio λ 2 difference within the scope of predetermined deviation, stop adjust
Save the aperture of the combustion gas by-passing valve.
Further, in the step S1, the step of initialization is demarcated is carried out to initial air-fuel ratio λ 2 and is specifically included:
S11, the engine initial launch close air-fuel ratio closed loop regulatory function；The engine electric-controlled unit acquisition
Electronic throttle aperture, engine speed, oxygen concentration and intake air temperature pressure data, and the data of acquisition are carried out at analysis
Reason obtains the actual air-fuel ratio λ 1 under current working；
S12, it runs under declared working condition, by manually adjusting the aperture of the proportional mixer come presetting practical air-fuel
Than λ 1；Then according to the difference of actual air-fuel ratio λ 1 and benchmark air-fuel ratio λ 0 under different operating conditions, by manually to the combustion gas
By-passing valve basis aperture k0 carries out initialization calibration and obtains initial combustion gas by-passing valve basis aperture k1, until the reality under different operating conditions
Border air-fuel ratio λ 1 is with the difference of corresponding benchmark air-fuel ratio λ 0 within the scope of predetermined deviation；
S13, in the initialization calibration process of the initial combustion gas by-passing valve basis aperture k1, according to the practical fortune of engine
Market condition obtains initial air-fuel ratio λ 2 by carrying out initialization calibration to benchmark air-fuel ratio λ 0 manually；After the completion of calibration, open empty
Combustion verifies nominal data than closed loop regulatory function；
S14, by under the initial combustion gas by-passing valve basis aperture k1 and different operating condition under the different operating conditions of re-calibration just
Beginning air-fuel ratio λ 2 is stored.
Further, in the step S3, according to the fuel gas temperature pressure signal of fuel gas temperature pressure sensor transmission
The step of being modified to the aperture of the combustion gas by-passing valve specifically includes:
S31, the engine electric-controlled unit are based on the fuel gas temperature actual value Ta and fuel gas temperature preset value acquired in real time
The difference of Td, regulating gas temperature coefficient Ft；
S32, the engine electric-controlled unit are based on the gaseous-pressure actual value Pa and gaseous-pressure preset value acquired in real time
The difference of Pd, regulating gas pressure coefficient Fp；
The aperture of combustion gas by-passing valve=current gas by-passing valve aperture × (1+Ft+Fp) after S33, amendment.
Further, in the step S3, according to the fuel gas temperature pressure signal of fuel gas temperature pressure sensor transmission
The step of being modified to the aperture of the combustion gas by-passing valve is specific further include:
S30, preset temperature correct constant α and pressure correction constant β.
Further, fuel gas temperature coefficient Ft=(Ta-Td) × α；
Gaseous-pressure coefficient Fp=(Pd-Pa) × β.
Further, in the step S3, according to the fuel gas temperature pressure signal of fuel gas temperature pressure sensor transmission
The step of being modified to the aperture of the combustion gas by-passing valve is specific further include:
S310, when the fuel gas temperature actual value Ta be more than or equal to preset maximum temperature limit value Tmax when, trigger combustion gas
The alarm of temperature height；When the fuel gas temperature actual value Ta is less than or equal to preset minimum temperature limit value Tmin, combustion gas temperature is triggered
Spend low alarm；
S320, when the gaseous-pressure actual value Pa be more than or equal to preset maximum pressure limit value Pmax when, trigger combustion gas
The alarm of pressure height；When the gaseous-pressure actual value Pa is less than or equal to preset minimum pressure Pmin, triggering gaseous-pressure is low
Alarm.
Further, the gas component includes mean calorie gas component, maximum calorific value gas component and minimum calorific value combustion
Gas ingredient.
After above-mentioned technical proposal, the beneficial effects of the present invention are:
The present invention is directed to the engine fuel control system of unstable ingredient gas source, including proportional mixer, engine
Electronic control unit, the crankshaft rotational speed sensor being electrically connected with engine electric-controlled unit, electronic throttle, air inlet temperature/pressure sensor
And lambda sensor；It is provided with combustion gas bypass line between the fuel gas inlet end of proportional mixer and mixed gas outlet end, fires
Fuel gas temperature pressure sensor and combustion gas by-passing valve are provided on gas bypass line.Control method includes: S1, engine initialization
Calibration, carries out initialization calibration to the initial air-fuel ratio λ 2 under different operating conditions；S2, engine operate normally, engine electric-controlled list
Member obtains the actual air-fuel ratio λ 1 under current working；S3, engine electric-controlled unit are based on the actual air-fuel ratio λ 1 under current working
With the difference of the initial air-fuel ratio λ 2 of calibration, air-fuel ratio closed loop control is carried out by the aperture of PID control regulating gas by-passing valve
System；It is carried out simultaneously according to aperture of the fuel gas temperature pressure signal of fuel gas temperature pressure sensor transmission to current gas by-passing valve
Amendment；Until the difference of actual air-fuel ratio λ 1 and the initial air-fuel ratio λ 2 of calibration within the scope of predetermined deviation, stop regulating gas
The aperture of by-passing valve.
The present invention can be different according to client by above-mentioned control system and the control method based on control system gas source
Targetedly self adaptive control is done, the aperture of combustion gas by-passing valve can be accurately controlled according to gas component, is had to air-fuel ratio
Effect control guarantees that the normal operation of engine and stablizing for power export.Without unstable because of gas component, and starting
Machine carries out the adjustment of data or mixer under shutdown status, therefore not will lead to user and stopped production due to power-off, ensure that
The economic benefit of user.
Detailed description of the invention
Fig. 1 is plane figure of the present invention for the engine fuel control system of unstable ingredient gas source；
Fig. 2 is control principle drawing of the present invention for the engine fuel control system of unstable ingredient gas source；
Fig. 3 is flow chart of the present invention for the engine fuel control method of unstable ingredient gas source；
Fig. 4 is the flow chart that initial air-fuel ratio λ 2 carries out initialization demarcating steps in Fig. 3；
Fig. 5 is according to the fuel gas temperature pressure signal of fuel gas temperature pressure sensor transmission in Fig. 3 to combustion gas by-passing valve
The step flow chart that aperture is modified；
In figure: 1- proportional mixer, 2- engine electric-controlled unit, 3- crankshaft rotational speed sensor, 4- electronic throttle, 5-
Air inlet temperature/pressure sensor, 6- lambda sensor, 7- combustion gas bypass line, 8- fuel gas temperature pressure sensor, 9- combustion gas bypass
Valve, 10- combustion gas, 11- air inlet pipe, 12- exhaust pipe, 13- turbine.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It is retouched it should be appreciated that specific embodiment described herein is intended merely to facilitate simplification
It states, to explain the present invention, is not intended to limit the present invention.
As Fig. 1 and Fig. 2 jointly shown in, for the engine fuel control system of unstable ingredient gas source, including proportion expression
Mixer 1, the crankshaft rotational speed sensor 3 for monitoring engine speed, is used to control into air inlet engine electric-controlled unit 2
The electronic throttle 4 of mixed gas flow, the intake air temperature pressure for monitoring mixture temperature pressure in air inlet pipe 11 in pipe 11
Sensor 5 and lambda sensor 6 for monitoring oxygen concentration in 5 exhaust pipes 12；Crankshaft rotational speed sensor 3, electronic throttle 4,
Air inlet temperature/pressure sensor 5 and lambda sensor 6 are electrically connected with engine electric-controlled unit 2；In addition to this, proportional mixer
It is provided with combustion gas bypass line 7 between 1 fuel gas inlet end and mixed gas outlet end, is provided with and is used on combustion gas bypass line 7
It monitors the fuel gas temperature pressure sensor 8 of fuel gas temperature pressure and enters gas flow in combustion gas bypass line 7 for controlling
Combustion gas by-passing valve 9.Ingredient into combustion gas 10 in proportional mixer 1 is unstable, belongs to unstable ingredient gas source.
In the present embodiment, air inlet temperature/pressure sensor 5 is located in the air inlet pipe 11 in 4 downstream of electronic throttle, oxygen sensing
Device 6 is set on the exhaust pipe 12 in 13 outlet end downstream of turbine；Fuel gas temperature pressure sensor 8 is located at combustion gas bypass line 7
Upstream；Ensure the accuracy of monitoring data by reasonable Arrangement sensor.
The present embodiment also discloses a kind of based on the above-mentioned engine fuel control system for unstable ingredient gas source
Control method.As Fig. 1, Fig. 3 to Fig. 5 jointly shown in, the core procedure of the control method includes:
S1, engine initialization calibration, gas component is prestored in engine electric-controlled unit 2, and (gas component includes average
Calorific value fuel gas ingredient, maximum calorific value gas component and minimum calorific value gas component), (λ 0 is real by benchmark air-fuel ratio λ 0 under different operating conditions
Border represents the MAP chart table for inquiring air-fuel ratio) and different operating condition under combustion gas by-passing valve basis aperture k0 (the practical representative confession of k0 is looked into
Ask the MAP chart table of combustion gas by-passing valve basis aperture)；Initialization calibration is carried out to the initial air-fuel ratio λ 2 under different operating conditions.
It should be noted that combustion gas by-passing valve basis under benchmark air-fuel ratio λ 0 and different operating condition under the different operating conditions prestored
Aperture k0 be it is tentative based on experience value, not fully correctly, it is therefore desirable to carry out initialization calibration；That is, in the base of empirical value
It is re-scaled on plinth.
S2, engine operate normally, and engine electric-controlled unit 2 is passed by electronic throttle 4, crankshaft rotational speed sensor 3, oxygen
Sensor 6 and admission pressure temperature sensor 5；Acquire electronic throttle aperture, engine speed, oxygen concentration and intake air temperature pressure
Data, and the data of acquisition are analyzed and processed, obtain the actual air-fuel ratio λ 1 under current working.
The initial air-fuel ratio λ 2 of S3, engine electric-controlled unit 2 based on actual air-fuel ratio λ 1 and calibration under current working
Difference carries out air-fuel ratio closed-loop control by the aperture of PID control regulating gas by-passing valve 9；Simultaneously according to fuel gas temperature pressure
The fuel gas temperature pressure signal that force snesor 8 transmits is modified the aperture of current gas by-passing valve 9.
That is, the principle of PID control are as follows: if the initial air-fuel ratio λ 2 of calibration is greater than the actual air-fuel ratio λ 1 under current working,
Illustrate that CH4 concentration becomes larger in combustion gas 10, the aperture that engine electric-controlled unit 2 controls to adjust combustion gas by-passing valve 9 reduces, and makes to enter hair
The gas quantity of motivation reduces, while the size of aperture can be modified that (ingredient of combustion gas 10 is by temperature, pressure according to temperature, pressure
It influences to increase, it is therefore desirable to correct)；If the initial air-fuel ratio λ 2 of calibration is less than the actual air-fuel ratio λ 1 under current working, explanation
CH4 concentration becomes smaller in combustion gas 10, and the aperture that engine electric-controlled unit 2 controls to adjust combustion gas by-passing valve 9 increases, and makes to enter engine
Gas quantity increase, while the size of aperture can be modified according to temperature, pressure.PID control is that those skilled in the art are used to
Technological means is not described in detail herein.
S4, until actual air-fuel ratio λ 1 and calibration initial air-fuel ratio λ 2 difference within the scope of predetermined deviation, stop adjust
The aperture of gas fuel saving by-passing valve 9.
In the present embodiment, the step of initialization is demarcated is carried out to initial air-fuel ratio λ 2 and is specifically included:
S11, engine initial launch close air-fuel ratio closed loop regulatory function；Lambda sensor 6 is not needed at this time to engine
Electronic control unit 2 provides feedback signal, is served only for monitoring oxygen concentration i.e. actual air-fuel ratio；Engine electric-controlled unit 2 passes through electronics section
Valve 4, crankshaft rotational speed sensor 3, lambda sensor 6 and admission pressure temperature sensor 5, acquisition electronic throttle aperture are started
Machine revolving speed, oxygen concentration and intake air temperature pressure data, and the data of acquisition are analyzed and processed, obtain the reality under current working
Border air-fuel ratio λ 1；Do not start to be demarcated at this time, that is, wouldn't be carried out under the operation of engine idling condition, partial load condition
Calibration.
S12, it runs under declared working condition, by manually adjusting the aperture of proportional mixer 1 come presetting actual air-fuel ratio λ
1 (λ 1≤λ of 0-c≤λ 0+c, c are fixed value；Primary, subsequent operating condition no longer comparative example formula mixer 1 is only lowered in declared working condition
It is adjusted)；Then according to the difference of actual air-fuel ratio λ 1 and benchmark air-fuel ratio λ 0 under different operating conditions, by (manual manually
Refer to and set basic opening value in engine electric-controlled unit 2 again, original basis aperture k0 is replaced) to combustion gas by-passing valve
Basic aperture k0 carries out initialization calibration acquisition initial combustion gas by-passing valve basis aperture k1, and (k1 is practical to be represented for inquiry initialization mark
The MAP chart table of combustion gas by-passing valve basis aperture after fixed), until actual air-fuel ratio λ 1 under different operating conditions and corresponding benchmark
The difference of air-fuel ratio λ 0 is within the scope of predetermined deviation.
S13, in the initialization calibration process of initial combustion gas by-passing valve basis aperture k1, according to engine actual motion feelings
Condition by (referring to set air fuel ratio value in engine electric-controlled unit 2 again manually, the quasi- air-fuel ratio λ 0 of former base is replaced manually
Change) the initial air-fuel ratio λ 2 of initialization calibration acquisition is carried out to benchmark air-fuel ratio λ 0；After the completion of calibration, opens air-fuel ratio closed loop and adjust
Function verifies nominal data.
In engine actual motion, the aperture of calibration adjustment combustion gas by-passing valve 9 anyway, benchmark air-fuel ratio λ 0 can be encountered
With the difference of actual air-fuel ratio λ 1 still can not within the scope of predetermined deviation situation or engine can not work normally and (send out
Motivation rotary speed unstabilization, power swing)；Illustrate that the benchmark air-fuel ratio λ 0 for being worth setting by rule of thumb is inappropriate at this time, it is therefore desirable to it
It is re-scaled.
S14, by under the initial combustion gas by-passing valve basis aperture k1 and different operating condition under the different operating conditions of re-calibration just
Beginning air-fuel ratio λ 2 is stored.Lookup after operating normally convenient for engine is called.
In short, initialization calibration process be modified on the basis of experience preset value it is perfect.Make its subsequent sky
The control for firing ratio is more accurate.
In the present embodiment, in step S3, the fuel gas temperature pressure signal transmitted according to fuel gas temperature pressure sensor 8 is to combustion
The step of aperture of gas by-passing valve 9 is modified specifically includes:
S30, preset temperature corrects constant α and pressure correction constant β in engine electric-controlled unit 2.
S31, engine electric-controlled unit 2 are based on fuel gas temperature actual value Ta (the fuel gas temperature pressure sensor 8 acquired in real time
Real-time monitoring) and fuel gas temperature preset value Td difference, regulating gas temperature coefficient Ft；Fuel gas temperature coefficient Ft=(Ta-Td)
×α.That is, as Ta > Td, Ft increases, and when Ta < Td, Ft reduces.
S310, when fuel gas temperature actual value Ta be more than or equal to preset maximum temperature limit value Tmax when, trigger fuel gas temperature
Height alarm；When fuel gas temperature actual value Ta is less than or equal to preset minimum temperature limit value Tmin, the low alarm of triggering fuel gas temperature.
S32, engine electric-controlled unit 2 are based on gaseous-pressure actual value Pa (the fuel gas temperature pressure sensor 8 acquired in real time
Real-time monitoring) and gaseous-pressure preset value Pd difference, regulating gas pressure coefficient Fp；Gaseous-pressure coefficient Fp=(Pd-Pa)
×β.That is, as Pa > Pd, Fp reduces, and when Pa < Pd, Fp increases.
S320, when gaseous-pressure actual value Pa be more than or equal to preset maximum pressure limit value Pmax when, trigger gaseous-pressure
Height alarm；When gaseous-pressure actual value Pa is less than or equal to preset minimum pressure Pmin, the low alarm of triggering gaseous-pressure.
The aperture of combustion gas by-passing valve=current gas by-passing valve aperture × (1+Ft+Fp) after S33, amendment；In the formula
The aperture of current gas by-passing valve be aperture after air-fuel ratio closed-loop control.
The present invention can be different according to client by above-mentioned control system and the control method based on control system gas source
Targetedly self adaptive control is done, the aperture of combustion gas by-passing valve can be accurately controlled according to gas component, is had to air-fuel ratio
Effect control guarantees that the normal operation of engine and stablizing for power export.Without unstable because of gas component, and starting
Machine carries out the adjustment of data or mixer under shutdown status, therefore not will lead to user and stopped production due to power-off, ensure that
The economic benefit of user.
The above is presently preferred embodiments of the present invention, is not intended to limit the invention, all in spirit of the invention
With any modification and improvement made within principle, protection scope of the present invention should be included in.
Claims (9)
1. be directed to unstable ingredient gas source engine fuel control system, including proportional mixer, engine electric-controlled unit,
For monitoring the crankshaft rotational speed sensor of engine speed, for controlling the electronics section into mixed gas flow in the air inlet pipe
Valve, for monitoring in the air inlet pipe air inlet temperature/pressure sensor of mixture temperature pressure and for monitoring the row
The lambda sensor of oxygen concentration in tracheae；The crankshaft rotational speed sensor, the electronic throttle, the intake air temperature pressure sensing
Device and the lambda sensor are electrically connected with the engine electric-controlled unit；It is characterized in that,
Combustion gas bypass line, the combustion gas are provided between the fuel gas inlet end of the proportional mixer and mixed gas outlet end
It is provided with the fuel gas temperature pressure sensor for monitoring fuel gas temperature pressure on bypass line and enters the combustion for controlling
The combustion gas by-passing valve of gas flow in gas bypass line.
2. being directed to the engine fuel control system of unstable ingredient gas source as described in claim 1, which is characterized in that described
Fuel gas temperature pressure sensor is located on the combustion gas bypass line of combustion gas by-passing valve upstream.
3. be directed to unstable ingredient gas source engine fuel control method, based on it is described in claim 1 for it is unstable at
The engine fuel control system of point gas source, which is characterized in that the control method includes:
S1, engine initialization calibration, prestore benchmark under gas component, different operating conditions in the engine electric-controlled unit
Combustion gas by-passing valve basis aperture k0 under air-fuel ratio λ 0 and different operating condition；Initial air-fuel ratio λ 2 under different operating conditions is carried out initially
Change calibration；
S2, the engine operate normally, and the engine electric-controlled unit acquires electronic throttle aperture, engine speed, oxygen
Concentration and intake air temperature pressure data, and the data of acquisition are analyzed and processed, obtain the actual air-fuel ratio λ under current working
1；
The difference of the initial air-fuel ratio λ 2 of S3, the engine electric-controlled unit based on actual air-fuel ratio λ 1 and calibration under current working
Value, adjusts the aperture of the combustion gas by-passing valve by PID control to carry out air-fuel ratio closed-loop control；Simultaneously according to the combustion gas temperature
The fuel gas temperature pressure signal of degree pressure sensor transmission is modified the aperture of presently described combustion gas by-passing valve；
S4, until actual air-fuel ratio λ 1 and calibration initial air-fuel ratio λ 2 difference within the scope of predetermined deviation, stop adjust institute
State the aperture of combustion gas by-passing valve.
4. being directed to the engine fuel control method of unstable ingredient gas source as claimed in claim 3, which is characterized in that described
In step S1, the step of initialization is demarcated is carried out to initial air-fuel ratio λ 2 and is specifically included:
S11, the engine initial launch close air-fuel ratio closed loop regulatory function；The engine electric-controlled unit acquires electronics
Throttle opening, engine speed, oxygen concentration and intake air temperature pressure data, and the data of acquisition are analyzed and processed, it obtains
Obtain the actual air-fuel ratio λ 1 under current working；
S12, it runs under declared working condition, by manually adjusting the aperture of the proportional mixer come presetting actual air-fuel ratio λ
1；Then according to the difference of actual air-fuel ratio λ 1 and benchmark air-fuel ratio λ 0 under different operating conditions, by being bypassed manually to the combustion gas
Valve base plinth aperture k0 carries out initialization calibration and obtains initial combustion gas by-passing valve basis aperture k1, until the practical sky under different operating conditions
It fires than λ 1 with the difference of corresponding benchmark air-fuel ratio λ 0 within the scope of predetermined deviation；
S13, in the initialization calibration process of the initial combustion gas by-passing valve basis aperture k1, according to engine actual motion feelings
Condition obtains initial air-fuel ratio λ 2 by carrying out initialization calibration to benchmark air-fuel ratio λ 0 manually；After the completion of calibration, air-fuel ratio is opened
Closed loop regulatory function verifies nominal data；
S14, by the initial sky under the initial combustion gas by-passing valve basis aperture k1 and different operating condition under the different operating conditions of re-calibration
Combustion is stored than λ 2.
5. being directed to the engine fuel control method of unstable ingredient gas source as claimed in claim 3, which is characterized in that described
In step S3, the combustion gas by-passing valve is opened according to the fuel gas temperature pressure signal that the fuel gas temperature pressure sensor transmits
The step of degree is modified specifically includes:
S31, the engine electric-controlled unit are based on the fuel gas temperature actual value Ta's and fuel gas temperature preset value Td acquired in real time
Difference, regulating gas temperature coefficient Ft；
S32, the engine electric-controlled unit are based on the gaseous-pressure actual value Pa's and gaseous-pressure preset value Pd acquired in real time
Difference, regulating gas pressure coefficient Fp；
The aperture of combustion gas by-passing valve=current gas by-passing valve aperture × (1+Ft+Fp) after S33, amendment.
6. being directed to the engine fuel control method of unstable ingredient gas source as claimed in claim 5, which is characterized in that described
In step S3, the combustion gas by-passing valve is opened according to the fuel gas temperature pressure signal that the fuel gas temperature pressure sensor transmits
The step of degree is modified is specific further include:
S30, preset temperature correct constant α and pressure correction constant β.
7. being directed to the engine fuel control method of unstable ingredient gas source as claimed in claim 6, which is characterized in that
Fuel gas temperature coefficient Ft=(Ta-Td) × α；
Gaseous-pressure coefficient Fp=(Pd-Pa) × β.
8. being directed to the engine fuel control method of unstable ingredient gas source as claimed in claim 5, which is characterized in that described
In step S3, the combustion gas by-passing valve is opened according to the fuel gas temperature pressure signal that the fuel gas temperature pressure sensor transmits
The step of degree is modified is specific further include:
S310, when the fuel gas temperature actual value Ta be more than or equal to preset maximum temperature limit value Tmax when, trigger fuel gas temperature
Height alarm；When the fuel gas temperature actual value Ta is less than or equal to preset minimum temperature limit value Tmin, triggering fuel gas temperature is low
Alarm；
S320, when the gaseous-pressure actual value Pa be more than or equal to preset maximum pressure limit value Pmax when, trigger gaseous-pressure
Height alarm；When the gaseous-pressure actual value Pa is less than or equal to preset minimum pressure Pmin, the low alarm of triggering gaseous-pressure.
9. being directed to the engine fuel control method of unstable ingredient gas source as claimed in claim 3, which is characterized in that described
Gas component includes mean calorie gas component, maximum calorific value gas component and minimum calorific value gas component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910748623.XA CN110410225A (en) | 2019-08-14 | 2019-08-14 | For the engine fuel control system and control method of unstable ingredient gas source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910748623.XA CN110410225A (en) | 2019-08-14 | 2019-08-14 | For the engine fuel control system and control method of unstable ingredient gas source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110410225A true CN110410225A (en) | 2019-11-05 |
Family
ID=68367428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910748623.XA Pending CN110410225A (en) | 2019-08-14 | 2019-08-14 | For the engine fuel control system and control method of unstable ingredient gas source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110410225A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925107A (en) * | 2019-12-20 | 2020-03-27 | 潍柴西港新能源动力有限公司 | Fuel closed-loop control method for gas power generation engine |
| CN111058954A (en) * | 2020-03-18 | 2020-04-24 | 山东赛马力动力科技有限公司 | Gas concentration self-adaptive control method for gas generator set |
| CN111089023A (en) * | 2020-03-20 | 2020-05-01 | 山东赛马力动力科技有限公司 | Air-fuel ratio measuring and controlling device of gas generator set |
| CN111520244A (en) * | 2020-04-30 | 2020-08-11 | 四川华气动力有限责任公司 | Operation control method and system for engine gas loop |
| CN111520243A (en) * | 2020-04-30 | 2020-08-11 | 四川华气动力有限责任公司 | Starting control method and system for engine gas loop |
| CN111577472A (en) * | 2020-05-28 | 2020-08-25 | 广西玉柴机器股份有限公司 | Fuel control method and system of gas engine |
| CN112324580A (en) * | 2020-11-04 | 2021-02-05 | 潍柴动力股份有限公司 | Engine air-fuel ratio control method, device and system |
| CN113074052A (en) * | 2021-05-07 | 2021-07-06 | 潍柴动力股份有限公司 | Gas pressure control method of hybrid vehicle and hybrid vehicle |
| CN113294266A (en) * | 2020-02-21 | 2021-08-24 | 中国石油天然气股份有限公司 | Air-fuel ratio regulating and controlling device and method for compressor |
| CN114562372A (en) * | 2022-01-26 | 2022-05-31 | 武汉菱电汽车电控系统股份有限公司 | Compressed natural gas automobile gas rail pressure control method and system and automobile |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070227123A1 (en) * | 2006-04-03 | 2007-10-04 | Honda Motor Co., Ltd. | Air-fuel Ratio control system for internal combustion engine |
| CN102230425A (en) * | 2011-05-16 | 2011-11-02 | 胜利油田胜利动力机械集团有限公司 | Air-fuel ratio rapid automatic adjusting system for gas generator set |
| WO2012053587A1 (en) * | 2010-10-22 | 2012-04-26 | ヤンマー株式会社 | Engine control method |
| CN104121115A (en) * | 2014-07-23 | 2014-10-29 | 山东大学 | System and method for controlling air-fuel ratio of electronic control servo pressure regulating type natural gas engine |
| CN203978644U (en) * | 2014-07-23 | 2014-12-03 | 山东大学 | Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system |
| CN105298664A (en) * | 2015-11-20 | 2016-02-03 | 山东大学 | System for controlling air-fuel ratio of biogas internal combustion generating set and control method of system |
| CN210343515U (en) * | 2019-08-14 | 2020-04-17 | 潍柴西港新能源动力有限公司 | Engine fuel control system for unsteady component gas source |
-
2019
- 2019-08-14 CN CN201910748623.XA patent/CN110410225A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070227123A1 (en) * | 2006-04-03 | 2007-10-04 | Honda Motor Co., Ltd. | Air-fuel Ratio control system for internal combustion engine |
| WO2012053587A1 (en) * | 2010-10-22 | 2012-04-26 | ヤンマー株式会社 | Engine control method |
| CN102230425A (en) * | 2011-05-16 | 2011-11-02 | 胜利油田胜利动力机械集团有限公司 | Air-fuel ratio rapid automatic adjusting system for gas generator set |
| CN104121115A (en) * | 2014-07-23 | 2014-10-29 | 山东大学 | System and method for controlling air-fuel ratio of electronic control servo pressure regulating type natural gas engine |
| CN203978644U (en) * | 2014-07-23 | 2014-12-03 | 山东大学 | Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system |
| CN105298664A (en) * | 2015-11-20 | 2016-02-03 | 山东大学 | System for controlling air-fuel ratio of biogas internal combustion generating set and control method of system |
| CN210343515U (en) * | 2019-08-14 | 2020-04-17 | 潍柴西港新能源动力有限公司 | Engine fuel control system for unsteady component gas source |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925107A (en) * | 2019-12-20 | 2020-03-27 | 潍柴西港新能源动力有限公司 | Fuel closed-loop control method for gas power generation engine |
| CN113294266A (en) * | 2020-02-21 | 2021-08-24 | 中国石油天然气股份有限公司 | Air-fuel ratio regulating and controlling device and method for compressor |
| CN113294266B (en) * | 2020-02-21 | 2022-07-05 | 中国石油天然气股份有限公司 | Air-fuel ratio regulating and controlling device and method for compressor |
| CN111058954A (en) * | 2020-03-18 | 2020-04-24 | 山东赛马力动力科技有限公司 | Gas concentration self-adaptive control method for gas generator set |
| CN111058954B (en) * | 2020-03-18 | 2020-08-28 | 山东赛马力动力科技有限公司 | Gas concentration self-adaptive control method for gas generator set |
| CN111089023A (en) * | 2020-03-20 | 2020-05-01 | 山东赛马力动力科技有限公司 | Air-fuel ratio measuring and controlling device of gas generator set |
| CN111520244A (en) * | 2020-04-30 | 2020-08-11 | 四川华气动力有限责任公司 | Operation control method and system for engine gas loop |
| CN111520243A (en) * | 2020-04-30 | 2020-08-11 | 四川华气动力有限责任公司 | Starting control method and system for engine gas loop |
| CN111577472A (en) * | 2020-05-28 | 2020-08-25 | 广西玉柴机器股份有限公司 | Fuel control method and system of gas engine |
| CN112324580A (en) * | 2020-11-04 | 2021-02-05 | 潍柴动力股份有限公司 | Engine air-fuel ratio control method, device and system |
| CN113074052A (en) * | 2021-05-07 | 2021-07-06 | 潍柴动力股份有限公司 | Gas pressure control method of hybrid vehicle and hybrid vehicle |
| CN114562372A (en) * | 2022-01-26 | 2022-05-31 | 武汉菱电汽车电控系统股份有限公司 | Compressed natural gas automobile gas rail pressure control method and system and automobile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110410225A (en) | For the engine fuel control system and control method of unstable ingredient gas source | |
| CN106121843B (en) | Environment compensation closed-loop control method for natural gas engine | |
| RU2383758C2 (en) | Engine control system and method to control said system | |
| US7823388B2 (en) | Gas turbine engine control system | |
| CN101614161B (en) | Device for controlling air-fuel ratio | |
| US6978774B2 (en) | Emission control valve for gas-fueled engines | |
| US9051888B2 (en) | Method for automatically controlling a stationary gas engine | |
| CA2575732A1 (en) | Fuel quantity modulation in pilot ignited engines | |
| US10077729B2 (en) | Internal combustion engine having a regulating device | |
| CN104121115A (en) | System and method for controlling air-fuel ratio of electronic control servo pressure regulating type natural gas engine | |
| CN203978644U (en) | Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system | |
| CN210343515U (en) | Engine fuel control system for unsteady component gas source | |
| CN105298664A (en) | System for controlling air-fuel ratio of biogas internal combustion generating set and control method of system | |
| JP2008082960A (en) | Tester of turbo charger | |
| US6745558B2 (en) | Gas-turbine engine control system | |
| CN205101127U (en) | Marsh gas internal combustion generating set air -fuel ratio control system | |
| JP2009030492A (en) | Power generation system | |
| JP4319481B2 (en) | Fuel gas supply and supply system for lean combustion gas engines | |
| CN109899168A (en) | A kind of binodal air valve engine control system applied to generating set | |
| JP2671146B2 (en) | Idle speed control device | |
| CN112324580B (en) | Engine air-fuel ratio control method, device and system | |
| JP4747132B2 (en) | Power generation system | |
| CN201436378U (en) | Air-fuel ratio control device | |
| US9181862B2 (en) | Exhaust-gas recirculation system and method for exhaust-gas recirculation | |
| KR20160061895A (en) | Method of starting an internal combustion engine operated with a fuel-air mixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |