CN102926881A - Automatic control method and system for air-fuel ratio of fuel gas generating set - Google Patents
Automatic control method and system for air-fuel ratio of fuel gas generating set Download PDFInfo
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- CN102926881A CN102926881A CN2012104827137A CN201210482713A CN102926881A CN 102926881 A CN102926881 A CN 102926881A CN 2012104827137 A CN2012104827137 A CN 2012104827137A CN 201210482713 A CN201210482713 A CN 201210482713A CN 102926881 A CN102926881 A CN 102926881A
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- fuel ratio
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- air fuel
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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
- Y02T10/40—Engine management systems
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Abstract
The invention relates to an automatic control method and system for air-fuel ratio of a fuel gas generating set. The control method is that the air-fuel ratio of the fuel gas generating set is controlled based on exhaust temperature and power, that is, the exhaust temperature control target is calculated out as per the corresponding relation of exhaust temperature and power at the ideal air-fuel ratio, and air-fuel ratio control is realized through the exhaust temperature control. The control system adopts the technical scheme that an electronic power meter is connected with the inside of the generating set, a temperature detection device is connected with an exhaust pipe of the generating set, the electronic power meter and the temperature detection device are connected with a signal input end of a processing unit, and the processing unit is connected with a mixer of the generating set through an actuating mechanism. The method and the system overcome defects in the prior art, the use is convenient, and the response speed is high.
Description
Technical field
The present invention relates to a kind of fuel gas generation unit air fuel ratio autocontrol method and system.
Background technique
The effect of fuel gas generation unit air fuel ratio automatic control system is under unmanned prerequisite of intervening, and controls in real time the mixed proportion of combustion gas and air, guarantees the work by combustion that mixed gas is can be in cylinder good.Present fuel gas generation unit air fuel ratio automatic control system both domestic and external is all by direct measurement inlet gas concentration control air fuel ratio.Its working principle is: directly utilize gas concentration sensor to measure mixture strength in the generator set suction tude, then according to the concentration signal that measures, adjusting mixer maintains air fuel ratio near the ideal value.Although this controlling method is the most direct, because be subject to the restriction of sensor technology, not yet ripe so far.Present gas concentration sensor has some defectives that are difficult to overcome: at first be that speed of response is slow, generally more than 15 seconds; Next is very responsive to dust, steam, foreign gas etc., can not work long hours in the middle of industrial environment; Be expensive again, can not extensively adopt.In addition, the gas component of fuel gas generation unit is complicated, usually not only contains a kind of combustible component, so only use single concentration sensor often can not satisfy the demand, this has just limited the applicability of this controlling method.
Summary of the invention
According to above deficiency of the prior art, the present invention will provide a kind of fuel gas generation unit air fuel ratio autocontrol method and system of easy to use, fast response time.
Fuel gas generation unit air fuel ratio autocontrol method provided by the invention, that to arrange gentle power be that control is according to coming fuel gas generation unit air fuel ratio is controlled, namely the corresponding relation according to row's temperature and power under the ideal air-fuel ratio calculates row's temperature control target, realizes air fuel ratio control by row's temperature control.
It may further comprise the steps:
(a) measure generator power;
(b) the ideal row temperature of calculating under the current power is worth;
(c) judge that row's temperature whether near ideal value, if then return step (a), then enters step (d) if not;
(d) judge that whether row's temperature is higher than desirable row's temperature value, if return step (a) after then increasing air fuel ratio, then enters step (e) if not;
(e) reduce to return step (a) after the air fuel ratio.
The system that realizes this method is connecting electronic wattmeter in generator set, and the outlet pipe place of generator set connects temperature detection device, electronic power meter is connected the signal input part for the treatment of device with temperature detection device, treatment device connects the mixer of generator set by actuating mechanism.
Temperature detection device is occasionally infrared radiation thermometer etc. of thermoelectricity.
Treatment device is PLC controller or single-chip computer control system etc.
Actuating mechanism is that stepper motor or private take angle electrical machinery etc.
Method among the present invention looks for another way, effective during use, directly perceived, and need not the working concentration sensor in the system, take electronic power meter and thermocouple as Detecting element, reliability is high, does not substantially need to safeguard, and is cheap, and can be applicable to contain the combustion gas of multiple combustible component, applicability is wide.
Description of drawings
Fig. 1 is method flow diagram among the present invention;
Fig. 2 is systematic square frame schematic diagram among the present invention;
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described further:
Enter step (a) after giving system power supply as shown in Figure 1
(a) measure generator power;
(b) the ideal row temperature of calculating under the current power is worth;
(c) judge that row's temperature whether near ideal value, if then return step (a), then enters step (d) if not;
(d) judge that whether row's temperature is higher than desirable row's temperature value, if return step (a) after then increasing air fuel ratio, then enters step (e) if not;
(e) reduce to return step (a) after the air fuel ratio.
By above step, fuel gas generation unit air fuel ratio is controlled as the control foundation to arrange gentle power, namely the corresponding relation according to row's temperature and power under the ideal air-fuel ratio calculates row's temperature control target, realizes air fuel ratio control by arranging temperature control.
As shown in Figure 2, the system that realizes this method is connecting electronic wattmeter in generator set, and the outlet pipe place of generator set connects thermocouple, and electronic power meter is connected the signal input part of PLC controller with thermocouple, and the PLC controller connects the mixer of generator set by stepper motor.
Working principle is as follows:
The PLC controller is the controller of whole system, is responsible for the collection site data and realizes control algorithm; Electronic power meter is used for measuring the power of generator set; The installation of TC is used for measuring row's temperature in waste pipe; Stepper motor is arranged in mixer, is used for handling gas valve and Air valves in the mixer, is the final controlling element of control system, can change air fuel ratio by the aperture that changes Air valves and gas valve.
Control system is after powering on, constantly gather the power of generator set, calculate the control target of row temperature and compare with row's temperature measurement value according to current power, if row's temperature measurement value differs more than 5 ℃ with row's temperature control target, just air fuel ratio is regulated, when arranging the temperature measurement value greater than row's temperature control target, control system increases air fuel ratio automatically, when arranging the temperature measurement value less than row's temperature control target, control system reduces air fuel ratio automatically.
Claims (6)
1. fuel gas generation unit air fuel ratio autocontrol method, it is characterized in that, to arrange gentle power as controlling according to coming fuel gas generation unit air fuel ratio is controlled, namely the corresponding relation according to row's temperature and power under the ideal air-fuel ratio calculates row's temperature control target, realizes air fuel ratio control by row's temperature control.
2. method according to claim 1 is characterized in that, may further comprise the steps:
(a) measure generator power;
(b) the ideal row temperature of calculating under the current power is worth;
(c) judge that row's temperature whether near ideal value, if then return step (a), then enters step (d) if not;
(d) judge that whether row's temperature is higher than desirable row's temperature value, if return step (a) after then increasing air fuel ratio, then enters step (e) if not;
(e) reduce to return step (a) after the air fuel ratio.
3. system that realizes weighing 1 described method, comprise generator set, it is characterized in that, connecting electronic wattmeter in the generator set, and the outlet pipe place of generator set connects temperature detection device, electronic power meter is connected the signal input part for the treatment of device with temperature detection device, treatment device connects the mixer of generator set by actuating mechanism.
4. system according to claim 3 is characterized in that, described temperature detection device is thermocouple.
5. system according to claim 3 is characterized in that, described treatment device is the PLC controller.
6. system according to claim 3 is characterized in that, described actuating mechanism is stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104827137A CN102926881A (en) | 2012-11-25 | 2012-11-25 | Automatic control method and system for air-fuel ratio of fuel gas generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012104827137A CN102926881A (en) | 2012-11-25 | 2012-11-25 | Automatic control method and system for air-fuel ratio of fuel gas generating set |
Publications (1)
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| CN102926881A true CN102926881A (en) | 2013-02-13 |
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| CN2012104827137A Pending CN102926881A (en) | 2012-11-25 | 2012-11-25 | Automatic control method and system for air-fuel ratio of fuel gas generating set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285967A (en) * | 2016-08-11 | 2017-01-04 | 淄博淄柴新能源有限公司 | Jet dynamic control realizes power maximized air-fuel ratio autocontrol method |
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| WO2001000978A1 (en) * | 1999-06-29 | 2001-01-04 | Heraeus Electro-Nite International N.V. | Method and apparatus for determining the a/f ratio of an internal combustion engine |
| CN1699734A (en) * | 2004-05-21 | 2005-11-23 | 上海工程技术大学 | Air fuel ratio feedback control method based on exhaust temperature for electric control gasoline engine under large load operating condition |
| JP2009057873A (en) * | 2007-08-30 | 2009-03-19 | Mitsubishi Heavy Ind Ltd | Gas engine integral control method and device |
| CN101696660A (en) * | 2009-09-25 | 2010-04-21 | 东莞市康达机电工程有限公司 | Method for controlling air-fuel ratio of fuel gas generator set |
| US20110257871A1 (en) * | 2010-04-16 | 2011-10-20 | Nikki Co., Ltd. | Air fuel ratio control device of engine |
| CN102493884A (en) * | 2011-12-23 | 2012-06-13 | 重庆潍柴发动机厂 | Gas inlet control method for large-power gas engine |
| CN102588132A (en) * | 2012-03-02 | 2012-07-18 | 中国石油天然气集团公司 | Air-fuel ratio control system of gas engine |
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2012
- 2012-11-25 CN CN2012104827137A patent/CN102926881A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001000978A1 (en) * | 1999-06-29 | 2001-01-04 | Heraeus Electro-Nite International N.V. | Method and apparatus for determining the a/f ratio of an internal combustion engine |
| CN1699734A (en) * | 2004-05-21 | 2005-11-23 | 上海工程技术大学 | Air fuel ratio feedback control method based on exhaust temperature for electric control gasoline engine under large load operating condition |
| JP2009057873A (en) * | 2007-08-30 | 2009-03-19 | Mitsubishi Heavy Ind Ltd | Gas engine integral control method and device |
| US20090076709A1 (en) * | 2007-08-30 | 2009-03-19 | Mitsubishi Heavy Industries, Ltd. | Method and device for integrative control of gas engine |
| CN101696660A (en) * | 2009-09-25 | 2010-04-21 | 东莞市康达机电工程有限公司 | Method for controlling air-fuel ratio of fuel gas generator set |
| US20110257871A1 (en) * | 2010-04-16 | 2011-10-20 | Nikki Co., Ltd. | Air fuel ratio control device of engine |
| CN102493884A (en) * | 2011-12-23 | 2012-06-13 | 重庆潍柴发动机厂 | Gas inlet control method for large-power gas engine |
| CN102588132A (en) * | 2012-03-02 | 2012-07-18 | 中国石油天然气集团公司 | Air-fuel ratio control system of gas engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285967A (en) * | 2016-08-11 | 2017-01-04 | 淄博淄柴新能源有限公司 | Jet dynamic control realizes power maximized air-fuel ratio autocontrol method |
| CN106285967B (en) * | 2016-08-11 | 2019-04-30 | 淄博淄柴新能源有限公司 | Jet dynamic control realizes the maximized air-fuel ratio autocontrol method of power |
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Application publication date: 20130213 |