CN105822399A - Oxygenating type ammonia catalytic conversion system in aftertreatment of gas engine and control method - Google Patents
Oxygenating type ammonia catalytic conversion system in aftertreatment of gas engine and control method Download PDFInfo
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- CN105822399A CN105822399A CN201610286597.XA CN201610286597A CN105822399A CN 105822399 A CN105822399 A CN 105822399A CN 201610286597 A CN201610286597 A CN 201610286597A CN 105822399 A CN105822399 A CN 105822399A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses an oxygenating type ammonia catalytic conversion system in aftertreatment of a gas engine and a control method. An ammonia leakage catalyst is further installed on the downstream portion of a three-way catalyst. The front end of the three-way catalyst and the two ends of the ammonia leakage catalyst are each provided with an oxygen detection unit. The oxygen detection units are connected with a control unit. A section of pipeline is led out of the front end of a throttling valve and is led to the part between the three-way catalyst and the ammonia leakage catalyst. The control unit controls opening and closing of an electronic control valve according to the detected content of the oxygen at the front end of the three-way catalyst and the detected content of the oxygen at the two ends of the ammonia leakage catalyst, and therefore whether air can enter the ammonia leakage catalyst or not can be controlled. By means of the oxygenating type ammonia catalytic conversion system, the ammonia leakage catalyst is additionally arranged on the basis of a traditional aftertreatment system, the manner of taking gas from the front portion of the throttling valve is adopted, enough oxidizing agents are provided for the ammonia leakage catalyst, and by means of the combination with a control system matched with the oxygenating type ammonia catalytic conversion system, the oxygenating type ammonia catalytic conversion system is simple in structure, economical, effective, easy to achieve technically and capable of solving the problem about ammonia emission of the three-way catalyst under the fuel-rich working condition.
Description
Technical field
The present invention relates to a kind of ammonia catalytic conversion system in gas engine post processing and control method thereof.
Background technology
In the last few years, large-area haze weather brought the biggest impact, the health of harm people to the productive life of numerous residents.China is promoted to accelerate the adjustment to energy resource structure and optimization.Wherein the granule of vehicular emission is one of main source of city haze.And the methane in natural gas accounts for more than the 90% of its composition, owing to methane is without carbochain, the soot generated in combustion process is few, and therefore, motor vehicles uses natural gas as realizing cleaning burning after fuel, pollutes significant to alleviating Chinese environmental.
But, electromotor is discharged for Europe six technology, it is exactly to use triple-effect catalytic unit and suitable waste gas recirculation that gas machine reach Europe six to discharge most economical and effective method, but there will be more emission intensity for triple-effect catalytic unit when working under fuel-rich operating mode so that aerofluxus is unfriendly to environment.
Processing the gas of the discharge of gas engine at present, exist technical problem is that: the triple-effect catalytic unit that after-treatment system is used, and under the fuel-rich operating modes such as startup and big load, it may appear that more emission intensity, there is presently no efficient solution.
Summary of the invention
For solving the deficiency that prior art exists, the invention discloses the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing and control method, the present invention is based on traditional triple effect exhaust-gas treatment system, add oxygen-complementing type NH_3 leakage catalyst converter, it is achieved emission intensity more under fuel-rich operating mode is efficiently treated through.
For achieving the above object, the concrete scheme of the present invention is as follows:
Oxygen-complementing type ammonia catalytic conversion system in gas engine post processing, including:
NH_3 leakage catalyst converter is installed in the downstream of triple-effect catalytic unit, the front end of triple-effect catalytic unit and NH_3 leakage catalyst converter be respectively arranged at two ends with oxygen detector unit, described oxygen detector unit is connected with control unit respectively, draw a pipe joint road in air throttle front end and lead on the pipeline between triple-effect catalytic unit and NH_3 leakage catalyst converter, described pipeline is provided with electronic control valve, and described electronic control valve is connected with control unit；The pipeline at the place, front end of electronic control valve is additionally provided with mass air flow sensor；
Described control unit controls the unlatching of electronic control valve according to the content of the front end of triple-effect catalytic unit of detection and the oxygen at the two ends of NH_3 leakage catalyst converter, can the air in pipeline according to mass air flow sensor detection controls the closedown of sub-control valve, then control air and enter NH_3 leakage catalyst converter.
Further, the air flow rate signal in the pipeline that described control unit is fed back according to mass air flow sensor individually controls whether electronic control valve closes.
Further, under any operating mode after the engine started, the signal collected is submitted to control unit by oxygen detector unit, the oxygen detector unit data of triple-effect catalytic unit front end are for the control of engine air-fuel ratio, and assist the oxygen detector unit data of NH_3 leakage catalyst converter front end to be used for judging whether to require supplementation with oxygen, and by the feedback of the oxygen sensor data to NH_3 leakage catalyst converter rear end, the unlatching of electronic control valve is judged by control unit, after electronic control valve is opened, the signal collected is fed back to control unit by mass air flow sensor, for judging the close moment of unidirectional electron control valve, thus control the oxygen concentration before and after NH_3 leakage catalyst converter in certain interval range, enable ammonia that oxidation reaction to occur more fully.
Further, the oxygen concentration that NH_3 leakage catalyst converter afterbody records is as the standard judging that ammonia reacts the most completely.
Further, described oxygen detector unit is automotive oxygen sensor.
Further, described electronic control valve is batch-type unidirectional electron control valve.
Further, described triple-effect catalytic unit is connected with turbocharger, and described turbocharger divides three tunnels, a road to be connected with electromotor, and another road is connected with air filter, and the 3rd tunnel is connected with charge air cooler, and described charge air cooler is connected with electronic control valve place pipeline.
Further, the pipeline between described air filter and turbocharger is additionally provided with mass air flow sensor.
The method of work of the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing, comprises the following steps:
Step one, first starts electromotor, it is ensured that in system, an equipment normally works；
Step 2, adjustment electromotor to any one operating mode, make electromotor run the time set more than at this stable conditions point；
Step 3, synchronous acquisition triple-effect catalytic unit front end and the oxygen sensor signal at NH_3 leakage catalyst converter two ends；
Step 4, the signal that the signal beamed back according to oxygen sensor gathers with mass air flow sensor, whether unidirectional electron control valve is opened by control unit judges, if judged result is for closing, then returns step 3 and continues to gather signal, otherwise, enter step 5；
Step 5, control unit judges, and electronic control valve is opened；
Step 6, after electronic control valve is opened, mass air flow sensor is started working, and the signal collected is fed back to control unit, is then back to step 3.
Further, under any operating mode, the signal that the oxygen sensor of triple-effect catalytic unit front end is collected by control unit tentatively judges, and the action of unidirectional electron control valve is performed by the signal of the oxygen sensor feedback of NH_3 leakage catalyst converter rear end, the concentration of the oxygen sensor monitoring oxygen of NH_3 leakage catalyst converter front end and NH_3 leakage catalyst converter rear end should be at certain scope, then control unit obtains required air quantity through calculating, if batch-type unidirectional electron control valve is opened, mass air flow sensor is started working, and using the data that detect as the basis of unidirectional electron control valve close moment.
Beneficial effects of the present invention:
The present invention is based on traditional triple effect exhaust-gas treatment system, add oxygen-complementing type NH_3 leakage catalyst converter, emission intensity more under fuel-rich operating mode is efficiently treated through, the present invention adds NH_3 leakage catalyst converter on the basis of tradition after-treatment system, and use the mode taking gas before air throttle, enough oxidants are provided for NH_3 leakage catalyst converter, in conjunction with the control system mated with this, simple in construction, economical and effective, the most easily realize, and triple-effect catalytic unit emission intensity problem under fuel-rich operating mode can be solved.
Accompanying drawing explanation
Fig. 1 is gas engine after-treatment system operating diagram of the present invention；
Fig. 2 is the logical flow chart of control system of the present invention；
In figure, 1, air filter, 2, charge air cooler, 3, the first mass air flow sensor, 4, turbocharger, the 5, first oxygen sensor, 6, triple-effect catalytic unit, 7, the second oxygen sensor, 8, NH_3 leakage catalyst converter, the 9, the 3rd oxygen sensor, 10, electronic control unit, 11, batch-type unidirectional electron control valve, the 12, second mass air flow sensor, 13, electromotor.
Detailed description of the invention:
The present invention is described in detail below in conjunction with the accompanying drawings:
Gas engine of the present invention sequentially passes through air filter 1 along airintake direction, mass air flow sensor, then through turbocharger 4 supercharging, cold in charge air cooler 2, drawing a pipe joint road in air throttle front end and lead between triple-effect catalytic unit 6 and NH_3 leakage catalyst converter 8, the oxidation for ammonia provides oxygen；The waste gas that gas engine 13 is discharged leads to NH_3 leakage catalyst converter 8 after turbocharger 4, triple-effect catalytic unit 6, is all disposed with oxygen sensor at the two ends of the front end of triple-effect catalytic unit 6 and NH_3 leakage catalyst converter 8.
Under any operating mode after electromotor 13 starts, the signal collected is submitted to electronic control unit 10 by oxygen sensor, judges current operating mode with next step execution.The oxygen sensor data of triple-effect catalytic unit 6 front end is mainly used in the control of engine air-fuel ratio, oxygenating amount is done preliminary judgement simultaneously, feedback by the oxygen sensor data to NH_3 leakage catalyst converter 8 front end and rear end, the unlatching of batch-type unidirectional electron control valve 11 is judged by electronic control unit 10, after batch-type unidirectional electron control valve 11 is opened, the signal collected is fed back to electronic control unit 10 by the second mass air flow sensor 12, for judging the close moment of batch-type unidirectional electron control valve 11, thus control the oxygen concentration before and after NH_3 leakage catalyst converter 8 in certain interval range, enable ammonia that oxidation reaction to occur more fully, the oxygen concentration that NH_3 leakage catalyst converter 8 rear end records also is as the standard judging that ammonia reacts the most completely.
In the downstream of triple-effect catalytic unit 6, NH_3 leakage catalyst converter 8 is installed again, NH_3 leakage catalyst converter 8 can be at efficient operation under excess oxygen, and there is certain storage oxygen function, then the pipeline before inlet manifold air throttle takes a small amount of air inlet, triple-effect catalytic unit 6 produces the amount of ammonia and determines that the amount of requisite oxygen agent is little, and taking gas from admission line will not impact the gas handling system of electromotor 13.Just because of above characteristic, control valve is chosen use batch-type unidirectional electron control valve 11.Control method is mainly manifested in the control to batch-type unidirectional electron control valve 11, including start-up time and unlatching duration；Electronic control unit 10, by collecting the signal that oxygen sensor is beamed back, controls the unlatching of electronic control valve, and by the feedback of mass air flow sensor, controls the close moment of electronic control valve.
Wherein, NH_3 leakage catalyst converter is positioned at the downstream of triple-effect catalytic unit, and for processing the ammonia that triple-effect catalytic unit produces, batch-type unidirectional electron control valve is positioned on the drainage tube branch road of gas engine inlet manifold air throttle front end, for controlling the oxygenating of NH_3 leakage catalyst converter.
Wherein, oxygen sensor lays respectively at triple-effect catalytic unit front end and NH_3 leakage catalyst converter two ends, mass air flow sensor is positioned at the front end of batch-type unidirectional electron control valve, and batch-type unidirectional electron control valve is controlled by signal and the feedback of mass air flow sensor that electronic control unit is collected for collecting oxygen sensor.
Embodiment:
As it is shown in figure 1, this gas engine exhaust after treatment system includes air filter 1, charge air cooler 2, first mass air flow sensor 3, turbocharger 4, the first oxygen sensor 5, triple-effect catalytic unit 6, second oxygen sensor 7, NH_3 leakage catalyst converter 8, the 3rd oxygen sensor 9, electronic control unit 10, batch-type unidirectional electron control valve 11, the second mass air flow sensor 12, electromotor 13.
According to the embodiment of the present invention, the exhaust after treatment system of gas engine 13 includes: emission intensity processing means, oxygenating control system.
The work process of emission intensity processing means is: taking gas supply NH_3 leakage catalyst converter 8 before air throttle, the aerofluxus that triple-effect catalytic unit 6 processed leads to NH_3 leakage catalyst converter 8, oxygen-enriched in NH_3 leakage catalyst converter 8 under conditions of make ammonia fully oxidized, then arrange to air.
As shown in Figure 2, the work process of oxygenating control system is, first gas engine 14 is started, under any operating mode, the signal that first oxygen sensor 5 is collected by electronic control unit 10 tentatively judges, and by the action of the signal execution unidirectional electron control valve 11 of the 3rd oxygen sensor 9 feedback, the second oxygen sensor 7 and the 3rd oxygen sensor 9 are monitored the concentration of oxygen and be should be at certain scope, and then electronic control unit 10 obtains required air quantity through calculating.If batch-type unidirectional electron control valve 11 is opened, the second mass air flow sensor 12 is started working, and using the data that detect as the basis of batch-type unidirectional electron control valve 11 close moment.If batch-type unidirectional electron control valve 11 is closed, the signal that electronic control unit 10 may proceed to beam back the first oxygen sensor 5 and the 3rd oxygen sensor 9 is analyzed judging.By above control process, it can be ensured that NH_3 leakage catalyst converter 8 efficient operation under conditions of oxygen-enriched, and to taking the accurately control of tolerance also for the interference reduced gas handling system.
The invention provides the logical flow chart of oxygenating control system, be described in detail in conjunction with Fig. 2.
In step S201, first start electromotor 13, inspection apparatus, it is ensured that each acquisition instrument normally works.
In step S202, adjust electromotor 13 and arrive any operating mode, make electromotor run more than 5 minutes at this stable conditions point.
In step S203, synchronous acquisition triple-effect catalytic unit 6 front end and the oxygen sensor signal at NH_3 leakage catalyst converter 8 two ends.
In step S204, the signal that the signal beamed back according to oxygen sensor gathers with mass air flow sensor, whether batch-type unidirectional electron control valve 11 is opened by electronic control unit 10 judges, if judged result is for closing, then returns step S203 and continues to gather signal.
In step S205, electronic control unit 10 judges, and batch-type unidirectional electron control valve 11 is opened.
In step S206, after batch-type unidirectional electron control valve 11 is opened, the second mass air flow sensor 12 is started working, and the signal collected is fed back to electronic control unit 10, is then back to step S203.
Although the detailed description of the invention of the present invention is described by the above-mentioned accompanying drawing that combines; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme, those skilled in the art need not to pay various amendments or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing, is characterized in that, including:
NH_3 leakage catalyst converter is installed in the downstream of triple-effect catalytic unit, the front end of triple-effect catalytic unit and NH_3 leakage catalyst converter be respectively arranged at two ends with oxygen detector unit, described oxygen detector unit is connected with control unit respectively, draw a pipe joint road in air throttle front end and lead on the pipeline between triple-effect catalytic unit and NH_3 leakage catalyst converter, described pipeline is provided with electronic control valve, and described electronic control valve is connected with control unit；The pipeline at the place, front end of electronic control valve is additionally provided with mass air flow sensor；
Described control unit controls the unlatching of electronic control valve according to the content of the front end of triple-effect catalytic unit of detection and the oxygen at the two ends of NH_3 leakage catalyst converter, can the air in pipeline according to mass air flow sensor detection controls the closedown of sub-control valve, then control air and enter NH_3 leakage catalyst converter.
2. the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing as claimed in claim 1, is characterized in that, the air flow rate signal in the pipeline that described control unit is fed back according to mass air flow sensor individually controls whether electronic control valve closes.
null3. the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing as claimed in claim 1，It is characterized in that，Under any operating mode after the engine started，The signal collected is submitted to control unit by oxygen detector unit，The oxygen detector unit data of triple-effect catalytic unit front end are for the control of engine air-fuel ratio，And assist the oxygen detector unit data of NH_3 leakage catalyst converter front end to be used for judging whether to require supplementation with oxygen，And by the feedback of the oxygen sensor data to NH_3 leakage catalyst converter rear end，The unlatching of electronic control valve is judged by control unit，After electronic control valve is opened，The signal collected is fed back to control unit by mass air flow sensor，For judging the close moment of unidirectional electron control valve，Thus control the oxygen concentration before and after NH_3 leakage catalyst converter in certain interval range，Enable ammonia that oxidation reaction to occur more fully.
4. the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing as claimed in claim 1, is characterized in that, the oxygen concentration that NH_3 leakage catalyst converter afterbody records is as the standard judging that ammonia reacts the most completely.
5. the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing as claimed in claim 1, is characterized in that, described oxygen detector unit is automotive oxygen sensor.
6. the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing as claimed in claim 1, is characterized in that, described electronic control valve is batch-type unidirectional electron control valve.
7. the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing as claimed in claim 1, it is characterized in that, described triple-effect catalytic unit is connected with turbocharger, described turbocharger divides three tunnels, one tunnel is connected with electromotor, another road is connected with air filter, and the 3rd tunnel is connected with charge air cooler, and described charge air cooler is connected with electronic control valve place pipeline.
8. the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing as claimed in claim 7, is characterized in that, the pipeline between described air filter and turbocharger is additionally provided with mass air flow sensor.
9. utilize the method for work of oxygen-complementing type ammonia catalytic conversion system in the arbitrary described gas engine post processing of claim 1-8, it is characterized in that, comprise the following steps:
Step one, first starts electromotor, it is ensured that in system, an equipment normally works；
Step 2, adjustment electromotor to any one operating mode, make electromotor run the time set more than at this stable conditions point；
Step 3, synchronous acquisition triple-effect catalytic unit front end and the oxygen sensor signal at NH_3 leakage catalyst converter two ends；
Step 4, the signal that the signal beamed back according to oxygen sensor gathers with mass air flow sensor, whether unidirectional electron control valve is opened by control unit judges, if judged result is for closing, then returns step 3 and continues to gather signal, otherwise, enter step 5；
Step 5, control unit judges, and electronic control valve is opened；
Step 6, after electronic control valve is opened, mass air flow sensor is started working, and the signal collected is fed back to control unit, is then back to step 3.
10. the method for work of the oxygen-complementing type ammonia catalytic conversion system in gas engine post processing as claimed in claim 9, it is characterized in that, under any operating mode, the signal that the oxygen sensor of triple-effect catalytic unit front end is collected by control unit tentatively judges, and the action of unidirectional electron control valve is performed by the signal of the oxygen sensor feedback of NH_3 leakage catalyst converter tail end, the concentration of the oxygen sensor monitoring oxygen of NH_3 leakage catalyst converter front end and NH_3 leakage catalyst converter rear end should be at certain scope, then control unit obtains required air quantity through calculating, if batch-type unidirectional electron control valve is opened, mass air flow sensor is started working, and using the data that detect as the basis of unidirectional electron control valve close moment.
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Cited By (4)
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| CN108333137A (en) * | 2017-11-27 | 2018-07-27 | 昆明贵研催化剂有限责任公司 | A method of it measuring three-effect catalysis material ammonia product and generates performance |
| CN109209584A (en) * | 2018-09-05 | 2019-01-15 | 安徽江淮汽车集团股份有限公司 | Engine DPF tires out carbon rate modifying system and adjusting method |
| CN111271162A (en) * | 2020-03-26 | 2020-06-12 | 重庆重客检测技术有限公司 | Ammonia escape catalyst with gas supply device and control method thereof |
| CN111322144A (en) * | 2020-03-31 | 2020-06-23 | 广西玉柴机器股份有限公司 | Emission control method and device of equivalent-burning gas engine |
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| CN109209584A (en) * | 2018-09-05 | 2019-01-15 | 安徽江淮汽车集团股份有限公司 | Engine DPF tires out carbon rate modifying system and adjusting method |
| CN111271162A (en) * | 2020-03-26 | 2020-06-12 | 重庆重客检测技术有限公司 | Ammonia escape catalyst with gas supply device and control method thereof |
| CN111322144A (en) * | 2020-03-31 | 2020-06-23 | 广西玉柴机器股份有限公司 | Emission control method and device of equivalent-burning gas engine |
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Inventor after: Zhang Qiang Inventor after: Li Peixin Inventor after: Liu Kunran Inventor after: Li Jingwei Inventor after: Li Xinyu Inventor after: Li Na Inventor after: Li Guoxiang Inventor before: Zhang Qiang Inventor before: Li Peixin Inventor before: Liu Kunran Inventor before: Li Xinyu Inventor before: Li Na |
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Application publication date: 20160803 |