CN104775941B - Improve the control method of gas engine transient response - Google Patents
Improve the control method of gas engine transient response Download PDFInfo
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- CN104775941B CN104775941B CN201510194513.5A CN201510194513A CN104775941B CN 104775941 B CN104775941 B CN 104775941B CN 201510194513 A CN201510194513 A CN 201510194513A CN 104775941 B CN104775941 B CN 104775941B
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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
Abstract
The present invention discloses a kind of control system improving gas engine transient response and method, system includes gas engine, fuel feed system, Iganition control system and Working Status Monitoring feedback system, fuel feed system includes fuel storage, fuel gas pipeline, combustion gas rail and fuel gas injection valve, Iganition control system includes ignition module and electronic controller, and Working Status Monitoring feedback system includes engine speed sensor, engine water temperature sensor, combustion gas rail pressure sensor, air flow sensor, exhaust gas temperature sensor and exhaust gas oxygen sensor.The present invention increase the amount of storage of combustion gas by fuel storage and ensure fuel gas supply during pressure stability；It is adjusted fuel gas injection knots modification by gathering the information such as air mass flow, exhaust gas oxygen, delivery temperature and engine speed, the transient response of gas engine can not only be improved, and the manual dexterity of the power set with gas engine as power source can be improved.
Description
Technical field
The present invention relates to a kind of control system improving gas engine transient response and method, belong to gas engine
Control technology field.
Background technology
Gaseous fuel includes natural gas, liquefied petroleum gas, coal bed gas, biogas etc., and gas is as the fuel of electromotor
There are wide material sources, the partly renewable, advantage that can synthesize, have the advantages that harmful gass and carbon emission are low in terms of discharge,
It has been widely used in the vehicles and power-equipment such as automobile, engineering machinery, drilling dynamics, to alleviating energy crisis and ring
Border pollution is significant.
The control strategy of the fuel gas injection amount that the gaseous propellant engines such as natural gas adopt at present be using air mass flow as
The main control parameter of every circulating gas emitted dose, the air mass flow being gathered by sensor and the air-fuel ratio setting calculate every
The fuel gas injection amount of circulation.The electromotor of measurement is controlled due to being entered by supercharger response, gas using this fuel gas injection
The restriction of the factor such as compressibility of flow process in gas exhaust piping, in the sudden load change of electromotor, the change of fuel gas injection amount
Change reflection is delayed, leads to the transient response of electromotor to be less than the liquid fuel motors such as diesel engine, has influence on equipment gas and sends out
The manual dexterity of the power set of motivation.
Content of the invention
For the deficiencies in the prior art, the invention provides a kind of control system improving gas engine transient response
And method, the transient response of gas engine can not only be improved, and can improve with gas engine as power source
The manual dexterity of power set.
The present invention solves its technical problem and adopts the technical scheme that：Improve the control system of gas engine transient response
System, including gas engine, fuel feed system, Iganition control system and Working Status Monitoring feedback system, is characterized in that, institute
State fuel feed system and include fuel storage, fuel gas pipeline, combustion gas rail and fuel gas injection valve, described fuel storage is led to
Cross fuel gas pipeline to connect with combustion gas rail, described fuel gas injection valve is arranged in the air inlet pipe of gas engine and is connected with combustion gas rail
Logical；Described Iganition control system includes ignition module and electronic controller, and described ignition module is connected with spark plug, ignition module
Control end be connected with the outfan of electronic controller；Described Working Status Monitoring feedback system include respectively with electronic controller
Connected engine speed sensor, engine water temperature sensor, combustion gas rail pressure sensor, air flow sensor, aerofluxuss temperature
Degree sensor and exhaust gas oxygen sensor, described engine speed sensor is arranged on the bell housing of gas engine, described
Motivation cooling-water temperature sensor is arranged in the machine body water cavity of gas engine, and described combustion gas rail pressure sensor is arranged on combustion gas rail,
Described air flow sensor is arranged in the air inlet pipe of gas engine, and described exhaust gas temperature sensor and aerofluxuss oxygen sense
Device is arranged on the exhaustor of gas engine.
Described fuel storage includes fuel cartridge, gas shutoff valve, gas pressure reducers and voltage stabilizing air accumulator, described combustion gas
Tank is connected with voltage stabilizing air accumulator by gas pressure reducers, and described gas shutoff valve is arranged on pipe between fuel cartridge and gas pressure reducers
Lu Zhong.Fuel cartridge stores high-pressure gas in order to increase the amount of storage of combustion gas, during voltage stabilizing air accumulator is in order to ensure fuel gas supply
The stability of pressure.
Described combustion gas rail includes hollow pipe, and the top of hollow pipe is provided with the air inlet connecting with fuel storage, hollow
Pipe one end is provided with combustion gas rail pressure sensor, and the bottom of hollow pipe is provided with the gas outlet connecting with fuel gas injection valve, the combustion of the present invention
Gas rail is rational in infrastructure, fast response time, simple installation and with low cost.
Described air inlet is external thread structure, can be connected with fuel gas pipeline perfection.
Described ignition module include the housing with opening, the multiple coils being arranged in described housing and and each
The patch panel of described coil electrical connection, described coil is single rhythmeur.The ignition module of the present invention passes through coil and wiring
Plate electrically connects, and coil is triggered according to electronic controller, thus realizing lighting a fire, is not only simple in structure reliability and manufacturing cost
Low.
The inwall of described housing has the detent installing described coil, described coil is positioned at described positioning recessed
In groove.
Present invention also offers a kind of control method improving gas engine transient response, it is characterized in that, including with
Lower process：
Control process during gas engine stable operation：Gas engine adopts lean burn in steady operational status
Mode, electronic controller calculates fuel gas injection amount by the use of air mass flow as main control parameters；
There is control process during sudden load change in gas engine：Gas engine runs into sudden load change and leads to electromotor to turn
When prompt drop is low or improves, electronic controller sends the instruction increasing or decreasing fuel gas injection amount first, carries out enriching or thinning mixed
Close gas to shorten the transient response time of electromotor, improve response, then electronic controller is further according to air mass flow, electromotor
Rotating speed and exhaust gas oxygen information are modified fuel gas injection amount.
Control process during described gas engine stable operation comprises the following steps：
S201, gas engine starting operation；
The air mass flow that S202, electronic controller are gathered according to air flow sensor and the air-fuel ratio of setting calculate combustion
The basic emitted dose of gas, and combustion gas is sprayed in the cylinder of gas engine, carry out work by combustion；
The oxygen content that S203, exhaust gas oxygen sensor gather in aerofluxuss makes reality as feeding back signal, correction fuel gas injection amount
Air-fuel ratio is consistent with setting air-fuel ratio, and gas engine realizes lean burn, stable operation in this operating point.
Described gas engine occurs control process during sudden load change to comprise the following steps：
When S204, gas engine load change, engine speed deviates setting speed；
S205, the change change fuel gas injection amount according to engine speed, if engine speed reduces, increase combustion gas
Emitted dose, if raised, reduces fuel gas injection amount；
S206, electronic controller are according to air flow sensor, exhaust gas temperature sensor, exhaust gas oxygen sensor and electromotor
Air mass flow, exhaust gas oxygen, delivery temperature and engine speed information that speed probe collects are adjusted gas injection
Penetrate knots modification, determine the relation of load changing rate and fuel gas injection amount after multiple cycle labeling, that is, electromotor is not in
It is also not in the excessively thin flame-out phenomenon leading to of gaseous mixture that the exceeded burning of row's temperature that gaseous mixture overrich leads to deteriorates；
S207, above-mentioned operating point are demarcated and are completed, the enriching of gaseous mixture and the extent control that weakens in certain limit,
During the transient working of load variations, steadily, transient response is good for engine operating condition change；
S208, continuous repeat step S202-S207 complete the demarcation of next operating point；
S209, complete the demarcation of gas engine arteries and veins spectrogram, realize full working scope stable operation, transient response is good.
Beneficial effects of the present invention are as follows：
Control system of the present invention by increasing the amount of storage of combustion gas and ensureing combustion gas using fuel storage
The stability of pressure during supply, the combustion gas rail of employing is rational in infrastructure, fast response time, simple installation and with low cost, and
And the air inlet of combustion gas rail can be connected with fuel gas pipeline perfection；Using ignition module pass through coil is electrically connected with patch panel,
Coil is triggered according to electronic controller, thus realizing lighting a fire, is not only simple in structure reliability and low cost of manufacture；The present invention
Gather the information such as air mass flow, exhaust gas oxygen, delivery temperature and engine speed by Working Status Monitoring feedback system to enter
Row adjustment fuel gas injection knots modification, can not only improve the transient response of gas engine, and can improve and be sent out with gas
Motivation is the manual dexterity of the power set of power source.
Method of the present invention employs the control of advanced air intake duct multi-point injection gas engine transient response
Strategy, gas engine adopts lean combustion mode when steady statue is run, when running into sudden load change, by changing combustion gas
The instruction of emitted dose is shortening the transient response time of electromotor, and the feedback signal according to air mass flow and exhaust gas oxygen sensor
To revise emitted dose, to not only improve the transient response of gas engine, and improve with gas engine as power source
The manual dexterity of the power set of vehicle, engineering machinery etc..
Brief description
Fig. 1 is the system structure diagram of the present invention；
Fig. 2 is method of the present invention flow chart；
In Fig. 1,101 fuel cartridges, 102 gas shutoff valves, 103 gas pressure reducers, 104 voltage stabilizing air accumulators, 105 Gas Pipe
Road, 106 combustion gas rail pressure sensor, 107 air flow sensor, 108 combustion gas rails, 109 fuel gas injection valves, 110 ignition modules,
111 spark plugs, 112 exhaust gas temperature sensors, 113 exhaust gas oxygen sensors, 114 gas engines, 115 engine speed sensings
Device, 116 engine water temperature sensors, 117 electronic controllers.
Specific embodiment
For the technical characterstic of this programme can be clearly described, below by specific embodiment, and combine its accompanying drawing, to this
Bright it is described in detail.Following disclosure provides many different embodiments or example for realizing the different knots of the present invention
Structure.In order to simplify disclosure of the invention, hereinafter the part and setting of specific examples is described.Additionally, the present invention is permissible
Repeat reference numerals and/or letter in different examples.This repeat to be for purposes of simplicity and clarity, itself does not indicate
Relation between various embodiments and/or setting is discussed.It should be noted that part illustrated in the accompanying drawings is not necessarily to scale
Draw.Present invention omits to the description of known assemblies and treatment technology and process to avoid being unnecessarily limiting the present invention.
As shown in figure 1, a kind of control system of improvement gas engine transient response of the present invention, it includes fuel cartridge
101st, gas shutoff valve 102, gas pressure reducers 103, voltage stabilizing air accumulator 104, fuel gas pipeline 105, combustion gas rail pressure sensor 106,
Air flow sensor 107, combustion gas rail 108, fuel gas injection valve 109, ignition module 110, spark plug 111, delivery temperature sensing
Device 112, exhaust gas oxygen sensor 113, gas engine 114, engine speed sensor 115, engine water temperature sensor 116 and
Electronic controller 117.Described fuel cartridge 101, gas shutoff valve 102, gas pressure reducers 103, voltage stabilizing air accumulator 104, combustion gas
Pipeline 105, combustion gas rail 108 and fuel gas injection valve 109 form the fuel feed system of gas transmitter 114, in order to send out in gas
Timing, quantitative injection combustion gas in the air intake duct of motivation 114；Described ignition module 110 and electronic controller 117 composition gas
The Iganition control system of transmitter 114, in order to start gas engine 114, described combustion gas rail pressure sensor 106, air stream
Quantity sensor 107, exhaust gas temperature sensor 112, exhaust gas oxygen sensor 113, engine speed sensor 115 and engine water temperature
Sensor 116 forms the Working Status Monitoring feedback system of gas transmitter 114, in order to gather the operation of gas engine 114
Parameters for transmission electron controller 117, and the control as electronic controller 117 and feedback parameter.
Described fuel cartridge 101 is connected with voltage stabilizing air accumulator 104 by gas pressure reducers 103, and fuel cartridge stores high-pressure gas
In order to increase the amount of storage of combustion gas, in order to ensure the stability of pressure during fuel gas supply, described combustion gas cuts voltage stabilizing air accumulator
Only valve 102 is arranged in pipeline between fuel cartridge 101 and gas pressure reducers 103；Described voltage stabilizing air accumulator 104 passes through fuel gas pipeline
105 are connected with combustion gas rail 108, described fuel gas injection valve 109 be arranged in the air inlet pipe of gas engine 114 and with combustion gas rail
108 connections；Described ignition module 110 is connected with the spark plug 111 of gas engine, the control end of ignition module 110 and electronics
The outfan of controller 117 is connected；The input of described electronic controller 117 respectively with engine speed sensor 115, start
Machine cooling-water temperature sensor 116, combustion gas rail pressure sensor 106, air flow sensor 107, exhaust gas temperature sensor 112 and aerofluxuss oxygen
Sensor 113 is connected, and described engine speed sensor 115 is arranged on the bell housing of gas engine 114, described electromotor
Cooling-water temperature sensor 116 is arranged in the machine body water cavity of gas engine 114, and described combustion gas rail pressure sensor 106 is arranged on combustion gas
On rail 108, described air flow sensor 107 is arranged in the air inlet pipe of gas engine 114, and described delivery temperature senses
Device 112 and exhaust gas oxygen sensor 113 are arranged on the exhaustor of gas engine 114.
Preferably, combustion gas rail 108 of the present invention includes hollow pipe, and the top of hollow pipe is provided with and voltage stabilizing air accumulator
The air inlet of 104 connections, described air inlet is external thread structure, can be connected with fuel gas pipeline perfection, hollow pipe one end is provided with combustion
Gas rail pressure sensor 106, the bottom of hollow pipe is provided with the gas outlet connecting with fuel gas injection valve 109, the combustion gas rail knot of the present invention
Structure rationally, fast response time, simple installation and with low cost.
Ignition module 110 of the present invention includes thering is the housing of opening, the multiple coils being arranged in described housing
And the patch panel electrically connecting with coil each described, described coil is single rhythmeur.The ignition module of the present invention passes through
Coil being electrically connected with patch panel, coil is triggered according to electronic controller, thus realizing lighting a fire, being not only simple in structure reliability
And low cost of manufacture.The inwall of the housing of described ignition module has the detent installing described coil, by described line
Circle is positioned in described detent.
As shown in Fig. 2 present invention also offers a kind of control method improving gas engine transient response, it includes
Following steps：
S201, gas engine starting operation；
The air mass flow that S202, electronic controller are gathered according to air flow sensor and the air-fuel ratio of setting calculate combustion
The basic emitted dose of gas, and combustion gas is sprayed in the cylinder of gas engine, carry out work by combustion；
The oxygen content that S203, exhaust gas oxygen sensor gather in aerofluxuss makes reality as feeding back signal, correction fuel gas injection amount
Air-fuel ratio is consistent with setting air-fuel ratio, and gas engine realizes lean burn, stable operation in this operating point.
When S204, gas engine load change, engine speed deviates setting speed；
S205, the change change fuel gas injection amount according to engine speed, if engine speed reduces, increase combustion gas
Emitted dose, if raised, reduces fuel gas injection amount；
S206, electronic controller are according to air flow sensor, exhaust gas temperature sensor, exhaust gas oxygen sensor and electromotor
Air mass flow, exhaust gas oxygen, delivery temperature and engine speed information that speed probe collects are adjusted gas injection
Penetrate knots modification, determine the relation of load changing rate and fuel gas injection amount after multiple cycle labeling, that is, electromotor is not in
It is also not in the excessively thin flame-out phenomenon leading to of gaseous mixture that the exceeded burning of row's temperature that gaseous mixture overrich leads to deteriorates；
S207, above-mentioned operating point are demarcated and are completed, the enriching of gaseous mixture and the extent control that weakens in certain limit,
During the transient working of load variations, steadily, transient response is good for engine operating condition change；
S208, continuous repeat step S202-S207 complete the demarcation of next operating point；
S209, complete the demarcation of gas engine arteries and veins spectrogram, realize full working scope stable operation, transient response is good.
As shown in figure 1, the injection of gas engine combustion gas of the present invention and combustion process.High pressure in fuel cartridge 101
Combustion gas enters gas pressure reducers 103 through gas shutoff valve 102, and gas pressure reducers are by the reduced pressure of high-pressure gas to certain numerical value
Afterwards, the combustion gas after decompression enters voltage stabilizing air accumulator 104, and voltage stabilizing air accumulator has certain volume it is ensured that fuel gas supply process
The stability of middle pressure, then combustion gas enters combustion gas rail 108, combustion gas Gui Shang UNICOM each cylinder fuel gas injection valve 109, electronic controller
In the opening and closing moment of 117 control fuel gas injection valves, combustion gas is sprayed into gas engine 114 according to certain jet law
Air intake duct, enters cylinder after-combustion and externally does work.In course of injection, electronic controller is according to air flow sensor 107, row
Engine operating parameter that gas temperature sensor 112, exhaust gas oxygen sensor 113, engine speed sensor 115 are collected and
The control arteries and veins modal data demarcated in advance in electronic controller, calculates time for spraying and the injection pulse width of combustion gas, realizes electromotor
Steady running.
The sky that the fuel gas injection amount control strategy that gas engine adopts at present is collected by air flow sensor 107
, as the main control parameter of the every circulating gas emitted dose of fuel gas injection valve 109, air mass flow and electronic controller are in advance for throughput
The fuel gas injection amount that the air-fuel ratio calculating demarcated often circulates, then uses other operational factor correction fuel gas injection amounts.This control
By supercharger response, combustion lag, gas, the compressibility factor of flow process in intake and exhaust pipeline is limited strategy.
So that engine load changes as a example：When gas engine 114 load suddenly change, the emitted dose of fuel gas injection valve 109
Change reflection delayed, lead to the transient response of gas engine 114 to be less than the liquid fuel motor such as diesel engine.
Therefore, the invention provides a kind of control plan improving air intake duct multi-point injection gas engine transient response
Slightly：Gas engine electronic controller when steady statue is run calculates gas injection by the use of air mass flow as main control parameters
The amount of penetrating, realizes thin stable burning in certain air-fuel ratio range for the electromotor；Run into sudden load change engine speed reduce or
During raising, electronic controller sends the instruction increasing or decreasing fuel gas injection amount, enriching or change lean mixture first, and shortening is started
The transient response time of machine, improves response, then further according to air mass flow, engine speed, exhaust gas oxygen sensor feedback
Signal correction emitted dose.In addition, the enriching of gaseous mixture and the degree weakening control in certain limit according to Experimental Calibration, prevent
Only the exceeded burning deterioration of row's temperature and the excessively thin flame-out phenomenon leading to of gaseous mixture that gaseous mixture overrich leads in electromotor.
The above is the preferred embodiment of the present invention, for those skilled in the art,
Without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also regarded as this
Bright protection domain, for example, in upper the application, with the example of natural gas engine sudden load change, invention has been described,
However, it may also be possible to apply the invention for using other gas engines that are existing or occurring in the future.
Claims (1)
1. improve the control method of gas engine transient response, it is characterized in that, including procedure below：
Control process during gas engine stable operation：Gas engine adopts lean burn side in steady operational status
Formula, electronic controller calculates fuel gas injection amount by the use of air mass flow as main control parameters；
There is control process during sudden load change in gas engine：Gas engine runs into sudden load change and leads to engine speed to drop
Low or improve when, electronic controller sends the instruction increasing or decreasing fuel gas injection amount first, carry out enriching or become lean mixture
To shorten the transient response time of electromotor, to improve response, then electronic controller is further according to air mass flow, engine speed
It is modified fuel gas injection amount with exhaust gas oxygen information；
Control process during described gas engine stable operation comprises the following steps：
S201, gas engine starting operation；
The air mass flow that S202, electronic controller are gathered according to air flow sensor and the air-fuel ratio of setting calculate combustion gas base
This emitted dose, and combustion gas is sprayed in the cylinder of gas engine, carry out work by combustion；
The oxygen content that S203, exhaust gas oxygen sensor gather in aerofluxuss makes actual air-fuel as feeding back signal, correction fuel gas injection amount
More consistent than with setting air-fuel ratio, gas engine realizes lean burn in this operating point, stable operation；
Described gas engine occurs control process during sudden load change to comprise the following steps：
When S204, gas engine load change, engine speed deviates setting speed；
S205, the change change fuel gas injection amount according to engine speed, if engine speed reduces, increase fuel gas injection
Amount, if raised, reduces fuel gas injection amount；
S206, electronic controller are according to air flow sensor, exhaust gas temperature sensor, exhaust gas oxygen sensor and engine speed
Sensor acquisition to air mass flow, exhaust gas oxygen, delivery temperature and engine speed information is adjusted fuel gas injection and changes
Variable, determines the relation of load changing rate and fuel gas injection amount, that is, electromotor is not in mixing after multiple cycle labeling
It is also not in the excessively thin flame-out phenomenon leading to of gaseous mixture that the exceeded burning of row's temperature that gas overrich leads to deteriorates；
S207, above-mentioned operating point are demarcated and are completed, the enriching of gaseous mixture and the extent control that weakens in certain limit, in load
During the transient working of change, steadily, transient response is good for engine operating condition change；
S208, continuous repeat step S202-S207 complete the demarcation of next operating point；
S209, complete the demarcation of gas engine arteries and veins spectrogram, realize full working scope stable operation, transient response is good.
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| CN104775941B true CN104775941B (en) | 2017-03-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2019206961A (en) * | 2018-05-30 | 2019-12-05 | トヨタ自動車株式会社 | Vehicle system |
| CN108979902A (en) * | 2018-07-20 | 2018-12-11 | 南京骁科信息科技有限公司 | New-energy automobile feeder with emission reduction energy-saving effect |
| CN109057997A (en) * | 2018-07-20 | 2018-12-21 | 南京骁科信息科技有限公司 | A kind of new-energy automobile feeder with emission reduction energy-saving effect |
| CN109184961A (en) * | 2018-10-04 | 2019-01-11 | 李晨天 | Air inlet (discrimination) pipe vacuum suction gaseous fuel Supply Method and device |
| CN109441651B (en) * | 2018-10-16 | 2020-11-03 | 安徽江淮汽车集团股份有限公司 | Natural gas jet pulse width correction method of dual-purpose fuel engine |
| CN109488470B (en) * | 2018-11-26 | 2022-04-05 | 潍柴动力股份有限公司 | Method and device for adjusting air-fuel ratio |
| CN110925107B (en) * | 2019-12-20 | 2022-02-22 | 潍柴西港新能源动力有限公司 | Fuel closed-loop control method for gas power generation engine |
| CN111237074B (en) * | 2020-01-19 | 2022-02-11 | 东风汽车集团有限公司 | Control method for avoiding engine starting flameout and storage medium |
| CN112648085A (en) * | 2020-12-03 | 2021-04-13 | 西安科美动力科技有限公司 | Dynamic compensation device for engine |
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Denomination of invention: Control methods for improving transient response of gas engines Effective date of registration: 20230921 Granted publication date: 20170301 Pledgee: Shizhong Branch of Qilu Bank Co.,Ltd. Pledgor: JINAN RICHNES ELECTRONIC Co.,Ltd. Registration number: Y2023980058125 |
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