CN109322751A - The gas engine of adaptive methane concentration variation starts control method - Google Patents
The gas engine of adaptive methane concentration variation starts control method Download PDFInfo
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- CN109322751A CN109322751A CN201811173960.2A CN201811173960A CN109322751A CN 109322751 A CN109322751 A CN 109322751A CN 201811173960 A CN201811173960 A CN 201811173960A CN 109322751 A CN109322751 A CN 109322751A
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- China
- Prior art keywords
- methane concentration
- methane
- value
- adaptive
- control method
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Classifications
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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
- F02D19/021—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
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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
- F02D19/026—Measuring or estimating parameters related to the fuel supply system
- F02D19/029—Determining density, viscosity, concentration or composition
-
- 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
-
- 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)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a kind of gas engines of adaptive methane concentration variation to start control method.The gas engine starts control method the following steps are included: firstly, before engine start, and sensing methane concentration device measures the methane concentration signal in pipeline in biogas；Secondly, control unit passes through monitoring sensing methane concentration device value of feedback, methane concentration value is judged if appropriate in gas engine claimed range, and when suitable, ECU inquires the target opening value of electronic-controlled mixer according to the target value of methane concentration value, biogas and fresh air mixed proportion；Finally, control unit calls the aperture of the target opening value adjustment electronic-controlled mixer inlet valve of electronic-controlled mixer to be started.Gas engine starting control method realizes the variation detection automation of methane in sewage gas concentration, and adaptive methane concentration changes sequencing, and methane fuelled engine starting quickly, effectively solves the problems, such as difficulty in starting caused by changing because of methane in sewage gas agrochemical.
Description
Technical field
The present invention relates to engine arts, open especially with regard to a kind of gas engine of adaptive methane concentration variation
Flowing control method.
Background technique
Attention with country to environmental protection, local government increasingly reinforces farm pollution discharge supervision, in addition country is right
Distributed energy is advocated, and more and more factories that cultivate start largely to build methane-generating pit with the excrement progress fermentation process to poultry
And utilization of power is ultimately become, this distributed energy application mode is highly suitable for far from urban district and can not provide supporting for alternating current
Grow field.It therefore, is the methane fuelled engine of combustion medium increasingly by the favor of farm using biogas.Its course of work such as Fig. 1 shows:
The blowdown of animal or life water generates biogas by methane-generating pit fermentation, and biogas is entered afterwards by biogas pretreatment (desulfurization, water removal)
Pressure stabilizing valve module carries out pressure adjusting, then enters back into mixer the mixed proportion of biogas and fresh air (control), finally into
Enter engine in-cylinder combustion generation power to generate electricity.
However this gaseous mixture (biogas) its composition by fermentation generation is considerably complicated and ratio is very unstable, wherein leading
To be methane (CH4 volume content accounts for about 50%~70%)；Followed by carbon dioxide (CO2, volume content accounts for about 20%~
40%)；In addition account for about there are also a small amount of hydrogen sulfide (H2S), nitrogen (N2), oxygen (O2), carbon monoxide (CO), vapor etc.
10% or so.Methane (CH4) is main combustion medium, and concentration is highly prone to such environmental effects, and methane concentration
It is very sensitive to change influence to engine performance, especially start-up course, if concentration change greatly will lead to engine without
Method starts, so very crucial to the control method of concentration for methane fuelled engine startup stage.
Ignition control, air capacity control etc. are substantially the same in industry methane fuelled engine control system at present, uniquely
Difference is on mixer i.e. mechanical or electric-controlled type:
1, mechanical mixer is certainty ratio hybrid mode (generally diaphragm type), according to the content of methane in current gas
The gaseous mixture ratio under some methane concentration is determined by adjusting the aperture of mixer entrance valve.And work as methane in sewage gas concentration
After variation, original ratio is not adapted to, and needs to manually adjust mixer gas valve aperture again in startup stage, new to adapt to
Biogas composition.
Advantage: it is easy to operate, do not need very high operative skill.
Disadvantage: whenever combustion gas composition variation when require to manually adjust again, and can not confirm adjustment after ratio whether
Optimum state is had been adjusted to, so operator needs certain operating experience, feels by artificial (listening), judges ratio
It is more subjective.In addition, mechanical mixer fuel control accuracy difference.
2, electronic-controlled mixer, this electronic-controlled mixer is identical as mechanical control mode in startup stage, i.e., according to tune
The gas valve opening angle value being solidificated in inside ECU when examination, when starting next time, system will be executed by scheduled opening value automatically.
Advantage: although also the same existing defects of startup stage control mode, under accidental conditions, system can lead to
The engine parameter for crossing sensor monitoring carries out accurate control and adjustment to combustion gas.Closed loop can also be carried out by supplementary means to repair
Just, control is accurate.
Disadvantage: startup stage is opened loop control, is needed again due to methane concentration variation can not start so equally existing
The defect of adjusting parameter.And general user can not also be adjusted ECU inner parameter, need engine manufacturer professional technique
Personnel on site's adjustment, cost of serving are very big.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The purpose of the present invention is to provide a kind of gas engines of the adaptive methane concentration of simple and reasonable steps variation
Start control method, the gas engine starting control method of the adaptive methane concentration variation realizes methane in sewage gas concentration
Variation detection automation, adaptive methane concentration change sequencing, and methane fuelled engine starting quickly, is effectively solved because of first in biogas
Difficulty in starting problem caused by alkane agrochemical changes.
To achieve the above object, the present invention provides a kind of gas engines of adaptive methane concentration variation to start control
Method, comprising the following steps: firstly, the methane that sensing methane concentration device is measured in pipeline in biogas is dense before engine start
Spend signal；Secondly, control unit by monitoring sensing methane concentration device value of feedback, judges that methane concentration value is sent out if appropriate for combustion gas
In motivation claimed range, when suitable, ECU inquires electricity according to the target value of methane concentration value, biogas and fresh air mixed proportion
Control the target opening value of mixer；Finally, control unit calls the target opening value adjustment electronic-controlled mixer of electronic-controlled mixer to enter
The aperture of mouth valve is started.
In a preferred embodiment, control unit judges methane concentration by monitoring sensing methane concentration device value of feedback
It is worth when being not suitable for gas engine claimed range, control unit output alarm signal simultaneously prompts methane concentration superelevation/ultralow.
In a preferred embodiment, sensing methane concentration device is measured in pressure stabilizing valve module output channel in biogas
Methane concentration signal.
In a preferred embodiment, biogas by the pressure stabilizing of pressure stabilizing valve module and removes granule dust in gas.
In a preferred embodiment, electronic-controlled mixer has 50% or less, 50%~60% and 60%~70% 3
The aperture shelves of a biogas and fresh air mixed proportion.
Compared with prior art, the gas engine of adaptive methane concentration variation according to the present invention starts control method
Have the following beneficial effects: that the gas engine starting control method of the adaptive methane concentration variation is dense according to methane in sewage gas
Degree is programmed for corresponding arteries and veins modal data with mixer aperture, and current natural pond is monitored by sensing methane concentration device in starting process
Methane concentration in gas is inquired and corresponding starting mixer opening value is called to be started, and realizes the variation of methane in sewage gas concentration
Detection automation, adaptive methane concentration change sequencing, and methane fuelled engine starting quickly, is effectively solved because of methane in sewage gas agriculture
Change difficulty in starting problem caused by changing.
Detailed description of the invention
Fig. 1 is the gas engine starting control method of adaptive methane concentration variation according to an embodiment of the present invention
Schematic diagram.
Fig. 2 is the gas engine starting control method of adaptive methane concentration variation according to an embodiment of the present invention
Control logic figure.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, the gas engine starting of adaptive methane concentration variation according to the preferred embodiment of the present invention
Control method realizes the variation detection automation of methane in sewage gas concentration, and adaptive methane concentration changes sequencing, and biogas starts
Machine starting quickly, effectively solves the problems, such as difficulty in starting caused by changing because of methane in sewage gas concentration.The adaptive methane concentration becomes
Change gas engine starting control method the following steps are included:
Firstly, sensing methane concentration device measures the first in pressure stabilizing valve module output channel in biogas before engine start
Alkane concentration signal；
Secondly, control unit judges methane concentration value if appropriate for combustion gas by monitoring sensing methane concentration device value of feedback
Within the scope of engine calls, when improper, control unit output alarm signal simultaneously prompts methane concentration superelevation/ultralow；When suitable,
Target opening value of the ECU according to the target value inquiry electronic-controlled mixer of methane concentration value, biogas and fresh air mixed proportion；
Finally, control unit call electronic-controlled mixer target opening value adjustment electronic-controlled mixer inlet valve aperture into
Row starting.
If Fig. 2 shows, by 5 pressure stabilizing of pressure stabilizing valve module and granule dust in gas is removed in biogas, before engine start, control
Unit (ECU) 3 processed powers on, and 2 work once electrified of sensing methane concentration device simultaneously measures the methane concentration signal in pipeline biogas.ECU
By monitoring sensing methane concentration device value of feedback, by ECU judge methane concentration value if appropriate in gas engine claimed range,
When improper, ECU output alarm signal simultaneously prompts methane concentration superelevation/ultralow；When suitable, ECU is according to methane concentration value, biogas
With the target opening value of target value (lambda value) the inquiry electronic-controlled mixer 4 of fresh air mixed proportion, startup stage biogas
In target value (lambda value) constant situation of fresh air mixed proportion, if methane concentration reduces, ECU inquires automatically controlled mixing
Device arteries and veins is composed to obtain the increasing of mixer target opening value, then electronic-controlled mixer aperture increases when starting engine 1, if methane concentration mentions
Height, ECU inquiry electronic-controlled mixer arteries and veins are composed to obtain the reduction of mixer target opening value, then electronic-controlled mixer aperture when starting engine
Reduce.It is possible thereby to guarantee that engine maintains in good flammable range in startup stage mixture strength, so that engine
Starting performance is good.
Preferably, according to the variation of methane concentration, variation range is subjected to interval subdivision, passes through experimental study methane concentration
Variation influences very little (can guarantee and start successfully) to starting in 10%.And the variation of methane in sewage gas concentration exists under normal circumstances
Between 45%~70%, so by the aperture shelves such as 50% of three electronic-controlled mixers 4 of setting hereinafter, 50%~60%, 60%
~70% (or more shelves), is programmed for corresponding arteries and veins modal data, starting process with mixer aperture according to methane in sewage gas concentration
In current methane in sewage gas concentration is monitored by sensing methane concentration device, inquire and call corresponding starting mixer aperture
Value is started.The control strategy of the gas engine starting control method of the adaptive methane concentration variation can be embedded with program
It is integrated in Engine ECU, hardware cost is low.Manual intervention is not necessarily to when starting engine, it is highly-safe.Biogas composition is adapted to become
It is wide to change range, starting success rate height, is reduced service cost at high reliablity.Used methane transducer probe is in sealed tube
It is not polluted vulnerable to greasy dirt and dust, the service life is long, reduces working service cost.By control logic and strategy it is found that engine is every
Detection methane concentration value is carried out before secondary starting automatically, can find in time methane concentration range it is whether excessive and and alarm into
Row processing.
To sum up, the gas engine starting control method of adaptive methane concentration variation according to methane in sewage gas concentration with
Mixer aperture is programmed for corresponding arteries and veins modal data, is monitored in current biogas in starting process by sensing methane concentration device
Methane concentration is inquired and corresponding starting mixer opening value is called to be started, and realizes the variation detection of methane in sewage gas concentration
Automation, adaptive methane concentration change sequencing, and methane fuelled engine starting quickly, effectively solves to become because of methane in sewage gas agrochemical
Difficulty in starting problem caused by changing.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (5)
1. a kind of gas engine of adaptive methane concentration variation starts control method, which comprises the following steps:
Firstly, sensing methane concentration device measures the methane concentration signal in pipeline in biogas before engine start；
Secondly, control unit judges that methane concentration value is started if appropriate for combustion gas by monitoring sensing methane concentration device value of feedback
In machine claimed range, when suitable, ECU is automatically controlled according to the target value inquiry of methane concentration value, biogas and fresh air mixed proportion
The target opening value of mixer；
Finally, control unit calls the aperture of the target opening value adjustment electronic-controlled mixer inlet valve of electronic-controlled mixer to be opened
It is dynamic.
2. the gas engine of adaptive methane concentration variation as described in claim 1 starts control method, which is characterized in that
Described control unit judges that methane concentration value is not suitable for gas engine and requires model by monitoring sensing methane concentration device value of feedback
When enclosing, control unit output alarm signal simultaneously prompts methane concentration superelevation/ultralow.
3. the gas engine of adaptive methane concentration variation as described in claim 1 starts control method, which is characterized in that
The sensing methane concentration device measures the methane concentration signal in pressure stabilizing valve module output channel in biogas.
4. the gas engine of adaptive methane concentration variation as claimed in claim 3 starts control method, which is characterized in that
The biogas is by the pressure stabilizing of pressure stabilizing valve module and removes granule dust in gas.
5. the gas engine of adaptive methane concentration variation as described in claim 1 starts control method, which is characterized in that
The electronic-controlled mixer has 50% or less, 50%~60% and 60%~70% 3 biogas and fresh air mixed proportion
Aperture shelves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173960.2A CN109322751A (en) | 2018-10-09 | 2018-10-09 | The gas engine of adaptive methane concentration variation starts control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811173960.2A CN109322751A (en) | 2018-10-09 | 2018-10-09 | The gas engine of adaptive methane concentration variation starts control method |
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| CN109322751A true CN109322751A (en) | 2019-02-12 |
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| CN201811173960.2A Pending CN109322751A (en) | 2018-10-09 | 2018-10-09 | The gas engine of adaptive methane concentration variation starts control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201003437Y (en) * | 2007-01-19 | 2008-01-09 | 合肥工业大学 | Electrical controlled double valve type gas fuel mixer |
| CN102884295A (en) * | 2010-05-31 | 2013-01-16 | 三菱重工业株式会社 | Gas engine |
| US20130213352A1 (en) * | 2010-10-28 | 2013-08-22 | Raj Kumar | Start of injection timing |
| JP2014020334A (en) * | 2012-07-20 | 2014-02-03 | Nikki Co Ltd | Ignition control method for alternative fuel engine |
| 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 |
-
2018
- 2018-10-09 CN CN201811173960.2A patent/CN109322751A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201003437Y (en) * | 2007-01-19 | 2008-01-09 | 合肥工业大学 | Electrical controlled double valve type gas fuel mixer |
| CN102884295A (en) * | 2010-05-31 | 2013-01-16 | 三菱重工业株式会社 | Gas engine |
| US20130213352A1 (en) * | 2010-10-28 | 2013-08-22 | Raj Kumar | Start of injection timing |
| JP2014020334A (en) * | 2012-07-20 | 2014-02-03 | Nikki Co Ltd | Ignition control method for alternative fuel engine |
| 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 |
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Application publication date: 20190212 |
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