CN101575999A - Hydrogen selective catalytic reduction device and control method thereof - Google Patents
Hydrogen selective catalytic reduction device and control method thereof Download PDFInfo
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- CN101575999A CN101575999A CNA2009100723391A CN200910072339A CN101575999A CN 101575999 A CN101575999 A CN 101575999A CN A2009100723391 A CNA2009100723391 A CN A2009100723391A CN 200910072339 A CN200910072339 A CN 200910072339A CN 101575999 A CN101575999 A CN 101575999A
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- hydrogen
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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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- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention provides a hydrogen selective catalytic reduction device and a control method thereof. The device comprises a high-pressure gas storing device, a filtering device, a pressure reducing device, a flow measuring device, an electrical control unit, a performer and various sensors. The electrical control unit judges the working status of a motor and extraction flow based on the signals of the sensors such as intake pressure, intake temperature, the location of an air throttle, rotary speed, top center, oxygen concentration and the like, measures the concentration of NOx in the front discharge pipe of the catalyzing device by an NOx sensor, judges the ejecting impulse width of hydrogen based on the pressure and temperature of a hydrogen supply system and adjusts the hydrogen ejecting volume based on the concentration of collected NOx in the rear discharge pipe of the catalyzing device, thus ensuring the transformation efficiency of NOx reaches the target control value and the ejecting timing of the ejected gas and the ejecting volume MAP are stored in the electrical control unit. The research results of the lean-burn natural gas motor show: the NOx transformation efficiency can reach 100 percent by ejecting hydrogen into the discharge pipe under different operational conditions of a motor.
Description
(1) technical field
What the present invention relates to is a kind of device of controlling the noxious gas emission of motor, the invention still further relates to the controlling method of this device.Be specifically related to a kind of hydrogen selective catalytic reduction (H
2-SCR) device and controlling method.
(2) background technique
Rapid development of automobile industry is brought very big serious oil shortage and the environmental pollution problem of also having produced simultaneously easily in production of giving people and life, countries in the world have been formulated more and more stricter fuel economy and Abgasgesetz in succession, the automaker is in order to reach the requirement of these rules, and in intense market competition, stand on the invincible position, develop actively engine energy-saving technology, explore the oil replacement energy of cleaning, research and develop exhaust aftertreatment devices efficiently.Diesel engine and Spark ignition type lean-combustion engine are remarkable because of its oil-saving effect, good environmental protection, and obtained the great attention of many countries, in order to make diesel emission satisfy following emission regulation demands, the internal combustion engine person proposes the multiple technologies scheme, wherein, optimized combustion+selective catalytic reduction (Selective CatalyticReduction, SCR) technological scheme can effectively be controlled NOx and PM discharging, its principle is that the optimization by combustion system makes PM just obtain control in combustion process, the NOx discharging that produces is that 32.5% the blue solution that adds carries out selective catalytic reduction as reducing agent by spray concentration in outlet pipe then, and this method can make the NOx transformation efficiency more than 85%; For the Spark ignition type lean-combustion engine, triple-effect catalytic unit lost efficacy under the lean burn conditions, can't control effectively to the NOx discharging, therefore also can adopt the SCR technology path that is similar to diesel engine, but utilize urea liquid to have some problems, have certain corrosivity as urea liquid as reducing agent, has pungent smell simultaneously, freeze easily when adding blue solution and being lower than-11 ℃ in temperature, have some difficulties, need extra problems such as heating so use at cold area.Also have and adopt HC fuel to carry out the research of selective catalytic reduction as reducing agent, but along with to CO
2The warm concern of problem of the global temperatures that causes needs to seek carbon-free fuel as reducing agent, and hydrogen is a kind of renewable resources of cleaning, also is a kind of effective reducing agent simultaneously, therefore utilizes H
2Reducing agent as NOx is a kind of up-and-coming method.
(3) summary of the invention
The object of the present invention is to provide a kind of a kind of hydrogen selective catalytic reduction device that can control effectively to the NOx discharging of motor.The present invention also aims to provide a kind of controlling method based on a kind of hydrogen selective catalytic reduction device.
The object of the present invention is achieved like this:
Hydrogen selective catalytic reduction device of the present invention by high-pressure gas cylinder 1, manually-operated gate 2, combustion gas filter cleaner 4, hydrogen flowmeter 5, high-pressure solenoid valve 6, fuel gas temperature and pressure transducer 7, electronic control pressure reducing device 8, tempering controller 9, hydrogen snifting valve 10, catalysis preprocessor 11, urge back NOx concentration sensor 12, urge before NOx concentration sensor 13 and ECU (Electrical Control Unit) 14 form; High Pressure Hydrogen gas cylinder 1 is through rotation manually operated valve 2 air feed in gas circuit, combustion gas filter cleaner 4 is connected on before the hydrogen flowmeter 5, explosion-proof high-pressure solenoid valve 6 is installed after hydrogen flowmeter 5, by key door 16 control explosion-proof high-pressure solenoid valves 6, explosion-proof high-pressure solenoid valve 6 backs connect electronic control pressure reducing device 8, the tempering controller 9 of connecting after the electronic control pressure reducing device 8, hydrogen injection valve 10 is installed in tempering controller 9 backs, hydrogen injection valve 10 is installed in before the catalysis preprocessor 11 on the exhaust duct, the front and back of catalysis preprocessor 11 are provided with respectively urges preceding NOx concentration sensor 13 and urges back NOx concentration sensor 12, NOx concentration sensor 13 before urging, urge the signal input ECU (Electrical Control Unit) 14 of the various sensor signals 15 of back NOx concentration sensor 12 and motor, ECU (Electrical Control Unit) 14 control high-pressure solenoid valve 6, electronic control pressure reducing device 8, fuel gas temperature and pressure transducer 7 and hydrogen snifting valve 10.
Based on a kind of controlling method of hydrogen selective catalytic reduction device at first opening manually operated valve 2 to system's air feed, opening key door 16 pilots engine, open high-pressure solenoid valve 6 simultaneously, and to ECU (Electrical Control Unit) 14 power supplies, the conditioning circuit of ECU (Electrical Control Unit) 14 will convert the signal that ECU (Electrical Control Unit) can be discerned to from the various sensor signals 15 of motor, the operating conditions of stationary engine, ECU (Electrical Control Unit) is according to the various sensor signals 15 from motor, determine engine speed, load, fuel flow rate, mixture strength and extraction flow, ECU (Electrical Control Unit) 14 is according to the engine exhaust flow, the chemical equivalent of NOx concentration and hydrogen and NOx concerns the emitted dose of judging hydrogen before the catalyst converter, with certain injection timing with hydrogen injection in outlet pipe, adjust jet pulsewidth then, make the transformation efficiency of NOx reach control target value, read the reading of hydrogen flowmeter 5, and write down jet pulsewidth and injection timing data, repeat above-mentioned steps, obtain injection timing and jet pulsewidth MAP data under the different engine operation conditions, and store in the ECU (Electrical Control Unit) 14, simultaneously ECU (Electrical Control Unit) 14 according to NOx control target value and catalyst converter after NOx concentration sensor 12 feedback signals the hydrogen injection amount is adjusted, reach the emission control requirement.
The usefulness of this invention is, a kind of hydrogen selective catalytic reduction system and controlling method thereof are provided, can the NOx discharging of diesel engine and Spark ignition type lean-combustion engine be control effectively, provide technological reserve and support for satisfying following more strict emission regulation demands.Result of study on the lean burn natural gas engine shows: can make the NOx transformation efficiency reach 100% by the method for spraying hydrogen in outlet pipe under the different operating conditionss of motor.
(4) description of drawings
Accompanying drawing is the schematic representation of hydrogen selective catalytic reduction device of the present invention.
(5) embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
A kind of H
2-SCR system is by high-pressure gas cylinder 1, manually-operated gate 2, pressure gauge 3, combustion gas filter cleaner 4, hydrogen flowmeter 5, high-pressure solenoid valve 6, fuel gas temperature and pressure transducer 7, decompressor 8, tempering controller 9, hydrogen snifting valve 10, catalysis preprocessor 11, urge back NOx concentration sensor 12, NOx concentration sensor 13 and ECU (Electrical Control Unit) 14 are formed before urging.Hydrogen is stored in the High Pressure Hydrogen gas cylinder 1 with the pressure of 20MPa, in the rating test, at first opens manually operated valve 2 to system's air feed, opens key door 16 and pilots engine, and opens high-pressure solenoid valve 6 simultaneously, and to H
2ECU (Electrical Control Unit) 14 power supplies of-SCR system, ECU (Electrical Control Unit) 14 is according to the working state of determining motor from the various sensor signals 15 of motor, ECU (Electrical Control Unit) 14 is according to the engine exhaust flow, the chemical equivalent of NOx concentration and hydrogen and NOx relation before the catalyst converter, hydrogen is ejected in the outlet pipe with certain injection timing, adjust jet pulsewidth then, make the transformation efficiency of NOx reach control target value, write down amounts of hydrogen and injection timing data under this operating mode, repeat above-mentioned steps, obtain injection timing and jet pulse-width data under the different engine operation conditions, and jet MAP stored in the ECU (Electrical Control Unit) 14, spraying the hydrogen amount simultaneously can also adjust in real time according to the feedback signal of NOx concentration sensor 12 behind the catalyst converter, makes emission level all the time in the control target scope.
Claims (2)
1, a kind of hydrogen selective catalytic reduction device is characterized in that: by high-pressure gas cylinder (1), manually-operated gate (2), combustion gas filter cleaner (4), hydrogen flowmeter (5), high-pressure solenoid valve (6), fuel gas temperature and pressure transducer (7), electronic control pressure reducing device (8), tempering controller (9), hydrogen snifting valve (10), catalysis preprocessor (11), urge back NOx concentration sensor (12), urge before NOx concentration sensor (13) and ECU (Electrical Control Unit) (14) form; High Pressure Hydrogen gas cylinder (1) is through rotation manually operated valve (2) air feed in gas circuit, combustion gas filter cleaner (4) is connected on hydrogen flowmeter (5) before, at hydrogen flowmeter (5) explosion-proof high-pressure solenoid valve (6) is installed afterwards, by key door (16) control explosion-proof high-pressure solenoid valve (6), explosion-proof high-pressure solenoid valve (6) back connects electronic control pressure reducing device (8), electronic control pressure reducing device (8) the tempering controller (9) of connecting afterwards, hydrogen injection valve (10) is installed in tempering controller (9) back, hydrogen injection valve (10) be installed on the exhaust duct catalysis preprocessor (11) before, the front and back of catalysis preprocessor (11) are provided with respectively urges preceding NOx concentration sensor (13) and urges back NOx concentration sensor (12), NOx concentration sensor (13) before urging, urge the signal input ECU (Electrical Control Unit) (14) of the various sensor signals (15) of back NOx concentration sensor (12) and motor, ECU (Electrical Control Unit) (14) control high-pressure solenoid valve (6), electronic control pressure reducing device (8), fuel gas temperature and pressure transducer (7) and hydrogen snifting valve (10).
2, a kind of controlling method based on hydrogen selective catalytic reduction device, it is characterized in that: at first open manually operated valve (2) to system's air feed, opening key door (16) pilots engine, open high-pressure solenoid valve (6) simultaneously, and power to ECU (Electrical Control Unit) (14), the conditioning circuit of ECU (Electrical Control Unit) (14) will convert the signal that ECU (Electrical Control Unit) can be discerned to from the various sensor signals (15) of motor, the operating conditions of stationary engine, ECU (Electrical Control Unit) is according to the various sensor signals (15) from motor, determine engine speed, load, fuel flow rate, mixture strength and extraction flow, ECU (Electrical Control Unit) (14) is according to the engine exhaust flow, the chemical equivalent of NOx concentration and hydrogen and NOx concerns the emitted dose of judging hydrogen before the catalyst converter, with certain injection timing with hydrogen injection in outlet pipe, adjust jet pulsewidth then, make the transformation efficiency of NOx reach control target value, read the reading of hydrogen flowmeter (5), and write down jet pulsewidth and injection timing data, repeat above-mentioned steps, obtain injection timing and jet pulsewidth MAP data under the different engine operation conditions, and store in the ECU (Electrical Control Unit) (14), simultaneously ECU (Electrical Control Unit) (14) according to NOx control target value and catalyst converter after NOx concentration sensor (12) feedback signal the hydrogen injection amount is adjusted, reach the emission control requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100723391A CN101575999A (en) | 2009-06-22 | 2009-06-22 | Hydrogen selective catalytic reduction device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100723391A CN101575999A (en) | 2009-06-22 | 2009-06-22 | Hydrogen selective catalytic reduction device and control method thereof |
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| CN101575999A true CN101575999A (en) | 2009-11-11 |
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| CNA2009100723391A Pending CN101575999A (en) | 2009-06-22 | 2009-06-22 | Hydrogen selective catalytic reduction device and control method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635429A (en) * | 2012-04-26 | 2012-08-15 | 北京工业大学 | Device and method for carrying out closed-loop control on discharge of internal combustion engine by using hydrogen and oxygen |
| CN102844535A (en) * | 2010-04-21 | 2012-12-26 | 喜星触媒株式会社 | Device for discharging exhaust gas from diesel engine, having ammonolysis module |
| CN103364661A (en) * | 2013-07-09 | 2013-10-23 | 镇江恒驰科技有限公司 | Device for testing performance of natural gas injection electromagnetic valve and testing method of device |
| CN106124795A (en) * | 2016-08-17 | 2016-11-16 | 凯迈（洛阳）气源有限公司 | A kind of top cycle speed test device and scavenger system thereof |
| CN107304711A (en) * | 2016-04-22 | 2017-10-31 | 罗伯特·博世有限公司 | Natural gas engine system and its tempering detection unit and method |
| CN111502839A (en) * | 2014-10-22 | 2020-08-07 | 交通知识产权控股有限公司 | Method and system for airflow control |
| CN113565600A (en) * | 2020-10-12 | 2021-10-29 | 长城汽车股份有限公司 | Vehicle exhaust gas treatment system and method and vehicle |
-
2009
- 2009-06-22 CN CNA2009100723391A patent/CN101575999A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102844535A (en) * | 2010-04-21 | 2012-12-26 | 喜星触媒株式会社 | Device for discharging exhaust gas from diesel engine, having ammonolysis module |
| CN102844535B (en) * | 2010-04-21 | 2015-04-08 | 喜星触媒株式会社 | Device for discharging exhaust gas from diesel engine, having ammonolysis module |
| CN102635429A (en) * | 2012-04-26 | 2012-08-15 | 北京工业大学 | Device and method for carrying out closed-loop control on discharge of internal combustion engine by using hydrogen and oxygen |
| CN102635429B (en) * | 2012-04-26 | 2013-12-04 | 北京工业大学 | Device and method for carrying out closed-loop control on discharge of internal combustion engine by using hydrogen and oxygen |
| CN103364661A (en) * | 2013-07-09 | 2013-10-23 | 镇江恒驰科技有限公司 | Device for testing performance of natural gas injection electromagnetic valve and testing method of device |
| CN111502839A (en) * | 2014-10-22 | 2020-08-07 | 交通知识产权控股有限公司 | Method and system for airflow control |
| CN111502839B (en) * | 2014-10-22 | 2022-06-10 | 交通知识产权控股有限公司 | Method and system for airflow control |
| CN107304711A (en) * | 2016-04-22 | 2017-10-31 | 罗伯特·博世有限公司 | Natural gas engine system and its tempering detection unit and method |
| CN107304711B (en) * | 2016-04-22 | 2021-03-05 | 罗伯特·博世有限公司 | Natural gas engine system and backfire detection unit and method thereof |
| CN106124795A (en) * | 2016-08-17 | 2016-11-16 | 凯迈（洛阳）气源有限公司 | A kind of top cycle speed test device and scavenger system thereof |
| CN113565600A (en) * | 2020-10-12 | 2021-10-29 | 长城汽车股份有限公司 | Vehicle exhaust gas treatment system and method and vehicle |
| CN113565600B (en) * | 2020-10-12 | 2022-08-26 | 长城汽车股份有限公司 | Vehicle exhaust gas treatment system and method and vehicle |
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Open date: 20091111 |