CN102588058B - Testing system for post-processing device of engine - Google Patents
Testing system for post-processing device of engine Download PDFInfo
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- CN102588058B CN102588058B CN2012100385931A CN201210038593A CN102588058B CN 102588058 B CN102588058 B CN 102588058B CN 2012100385931 A CN2012100385931 A CN 2012100385931A CN 201210038593 A CN201210038593 A CN 201210038593A CN 102588058 B CN102588058 B CN 102588058B
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- voltage stabilizing
- temperature
- carrier
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000012805 post-processing Methods 0.000 title abstract description 4
- 239000007789 gas Substances 0.000 claims abstract description 102
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 31
- 238000000926 separation method Methods 0.000 claims description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 6
- 238000013481 data capture Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000002196 Pyroceram Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
Classifications
-
- 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
Abstract
The invention relates to a testing system for a post-processing device of an engine. The testing system is characterized in that a compressor provides high-pressure air for an air seperation machine, and O2 and N2 from the air seperation machine respectively enter into an O2 voltage stabilizing air tank and an N2 voltage stabilizing air tank; the fluxes of high pressure gas cylinder groups containing various exhaust gas components are controlled by using a mass flowmeter; the various exhaust gas components are mixed with O2 and N2 in a mixing cavity to form a gas with different proportions of components so as to simulate the exhaust gas of the engine; the mixed gas is heated to a set experimental temperature; the heated gas enters a main body section for testing a carrier in the post-processing device; the pressure drop of the main body section is measured by using a differential pressure transducer; the change of an internal temperature field of the main body section is measured through a temperature sensor; and the collection and control of signals of the testing system are finished through a data acquisition card and a microcomputer. The testing system can be used for testing the carrier by accurately simulating exhaust gases of working conditions of the engine and has the characteristics of convenient testing and good repeatability of test results.
Description
Technical field
The invention belongs to engine exhaust reprocessing testing apparatus, be specifically related to the waste gas of the various operating modes of a kind of simulated engine, and the test system that adopts the carrier of engine post-treatment apparatus that this waste gas is handled.
Background technique
At present, energy-saving and emission-reduction have become the focus theme in the whole world, and automobile then is the consumption rich and influential family of the energy, therefore, realize that the energy-saving and emission-reduction of automobile are imperative.Various advanced engine technologies are applied to the discharging that automobile reduces its fuel consumption rate and pollutant; Can not satisfy the more and more requirement of the Abgasgesetz of strictness fully but only depend on the control cylinder internal combustion to realize engine energy-saving and reduce discharging, especially to the control of its exhaust emission, will depend on the post-processing technology of motor gradually.The after-treatment device of motor has: petrol engine three-way catalytic converter (TWC), and use for diesel engine oxidation catalytic converter (DOC), nox adsorber (LNT), particulate matter catcher (DPF), etc.These after-treatment devices these devices need be installed on engine pedestal usually when carrying out testing property and exploitation or car load is tested, and the experiment work amount is big, need to consume lot of manpower and material resources; When especially after-treatment device being carried out the long durability test, the workload that it is huge and experimental expenses will bring bigger difficulty with exploitation to the testing property of after-treatment device.Therefore, press for the system of exploitation a kind of energy simulated engine waste gas (various flows, temperature, gas componant), satisfy the demand of various after-treatment device testing propertys.
Summary of the invention
It is simple, economical to the purpose of this invention is to provide a kind of test, various exhaust operating modes that can simulated engine are to carry out the test system of a kind of engine post-treatment apparatus of testing property to engine post-treatment apparatus (as TWC, DOC, LNT and DPF etc.) carrier.
The object of the present invention is achieved like this: a kind of test system of engine post-treatment apparatus, comprise micro computer, the data collecting card that is connected with micro computer, air compressor outlet is connected with air separation machine, the oxygen outlet of air separation machine and nitrogen outlet respectively with O
2Voltage stabilizing gas tank and N
2The voltage stabilizing gas tank connects, O
2Voltage stabilizing gas tank and N
2The outlet of the voltage stabilizing gas tank pipeline through mass flowmenter is installed respectively is connected with mixed air cavity; CO
2Gas cylinder, CO gas cylinder, HC gas gas cylinder, NO gas cylinder and NO
2The gas cylinder pipeline through mass flowmenter is installed respectively is connected with mixed air cavity; Mix the air cavity outlet and is connected with heater and the main paragraph tested as the carrier of packing in turn, main paragraph exports the blank pipe that runs in; Heater outlet is provided with feedback temperature transducer, O
2Voltage stabilizing gas tank and N
2Be respectively equipped with pressure transducer on the voltage stabilizing gas tank; Above-mentioned feedback with temperature transducer, pressure transducer and above-mentioned all mass flowmenters respectively with described data capture card connection.
The aforementioned body segment structure is: suction tude is welded on the little cephalic par of CONCENTRIC REDUCER, the major part end of CONCENTRIC REDUCER is connected through flange with columnar main paragraph housing front portion, main paragraph housing rear end is connected with a temperature transducer mounting flange through bolt, the main paragraph housing is welded with steam outlet pipe on the rear portion, and this steam outlet pipe is vertical with the main paragraph housing; Be provided with the gas sample mouth on suction tude and the steam outlet pipe and survey mouth as temperature sensor mounted temperature; The tubular carrier installation housing that is positioned at main paragraph housing, both ends open is connected with the main paragraph housing through flange; Uniform on the temperature transducer mounting flange to be connected with a plurality of clampings pullover, and each clamping is pullover to be provided with a bed temperature sensor; The bed temperature sensor extend into carrier inside from the pullover endoporus of clamping.
Also have differential pressure pickup, differential pressure pickup is connected with steam outlet pipe with the suction tude of described main paragraph; The signal output part of differential pressure pickup and described data capture card connection.
Above-mentioned all mass flowmenters are the hot-wire mass flowmenter.
Above-mentioned heater is axial flow thermic lance heater.
Be provided with the compressor supply relay in the current supply circuit of above-mentioned air compressor, the compressor supply relay is connected with described micro computer.
Above-mentioned heater outlet is provided with feedback, and to use temperature transducer, the maximum heating temperature of heater be 700 ℃, heater outlet temperature fluctuation＜5 ℃.
The above-mentioned bed temperature sensor that stretches into carrier inside is 1～20.
In the native system, air compressor provides high-pressure air for air separation machine, is O with air separation
2And N
2, and control O with mass flowmenter respectively
2And N
2Flow; Gas cylinder group (the various waste gas components of splendid attire) is by mass flowmenter control flow, with O
2And N
2Mix, form the gas (simulated engine waste gas) of different component ratios; Mixed gas enters heater, gas is heated to the experimental temperature of setting; High-temperature gas enters the main paragraph that after-treatment device is installed, and the carrier in the after-treatment device is tested; The entrance and exit of main paragraph offers temperature and surveys mouth and sample gas sample tap; The pressure drop of after-treatment device is measured by differential pressure pickup, and the carrier inside change of temperature field is measured by temperature transducer; The signal of each parts of whole system is finished by a data capture card, finally comes go forward side by side line data storage of each parts work of control system by micro computer.
The exhaust pressure of above-mentioned air compressor also disposes two (O greater than 5 bar between air separation machine and mass flowmenter
2And N
2) the voltage stabilizing gas tank, the voltage stabilizing gas tank all disposes pressure transducer, opens air compressor to the gas tank air feed when pressure is low.
Compared with prior art, the invention has the beneficial effects as follows:
1, simulated engine exhaust: compressor, air separation machine, voltage stabilizing gas tank, gas cylinder group and mass flowmenter have been controlled flow and the gas composition ratio of the system that enters, but the various flows of simulated engine exhaust and waste gas component; In addition, heater can be heated to mixed (simulation) gas more than 700 ℃, but various row's temperature of simulated engine.
2, operating mode is stable, and repeatability is strong: the hot-wire mass flowmenter of band pressure feedback (band pressure feedback function) can keep the stability of flow of each gas branch road when after-treatment device produces pressure surge with the increase of experimental period; In case gas flow is stable, the gas temperature of heater outlet just is unlikely to produce bigger fluctuation, has guaranteed the stable of flow system flow, temperature, gas composition, thereby has guaranteed that test has stronger repeatability.
3, easy accessibility: the main paragraph that after-treatment device is installed is demountable structure, the after-treatment device carrier of different geometrical structure parameters (cross section of different length, different size (circle or runway shape)) can be installed, satisfy test and development requirement that the different model motor is used after-treatment device.
4, can monitor after-treatment device temperature inside field in real time changes: the carrier of after-treatment device is ceramic material or silicon carbide material usually, is the honeycomb pore passage structure.If measure its inside temperature field in its housing radial aperture, with destroying certain carrier duct, bring certain error to test; In addition, if the reprocessing carrier is the filter of wall-flow type, if in radial aperture, then whole carrier can be destroyed, the purpose of filtering can not be realized.Therefore, the present invention adopts the exit portion at main paragraph that T type structure is set, when satisfying the exhaust needs, axially insert temperature transducer along the carrier duct, neither destroy carrier, can satisfy the demand that portion within it arranges a plurality of temperature transducers again, simple in structure effectively.
Description of drawings
Fig. 1 is system diagram of the present invention.
Fig. 2 is the structural representation of main paragraph shown in Figure 1.
Embodiment
Among Fig. 1: 1, air compressor; 2a, O
2The voltage stabilizing gas tank; 2b, N
2The voltage stabilizing gas tank; 3a, O
2Mass flowmenter; 3b, N
2Mass flowmenter; 4, mix air cavity; 5, heater; 6, (heater outlet) feedback temperature transducer; 7, differential pressure pickup; 8, main paragraph; 9, emptying pipe; 10a, (O
2Jar) pressure transducer; 10b, (N
2Jar) pressure transducer; 11, data collecting card; 12, compressor supply relay; 13, ac power supply; 14, CO
2Gas cylinder; 15, CO gas cylinder; 16, HC gas gas cylinder (HC is hydrocarbon); 17, NO gas cylinder; 18, NO
2Gas cylinder; 19, (CO
2) mass flowmenter; 20, (CO) mass flowmenter; 21, (HC gas) mass flowmenter; 22, (NO) mass flowmenter; 23, (NO
2) mass flowmenter; 24, electric power regulator; 25, micro computer; 26, air separation machine.
Fig. 1 illustrates, and the present invention includes micro computer 25, the data collecting card 11 that is connected with micro computer, air compressor 1 outlet is connected with air separation machine 26, the oxygen outlet of air separation machine and nitrogen outlet respectively with O
2Voltage stabilizing gas tank 2a and N
2Voltage stabilizing gas tank 2b connects, O
2Voltage stabilizing gas tank 2a and N
2The outlet of the voltage stabilizing gas tank 2b pipeline through mass flowmenter 3a, 3b are installed respectively is connected with mixed air cavity 4; CO
2Gas cylinder 14, CO gas cylinder 15, HC gas gas cylinder 16, NO gas cylinder 17 and NO
2Gas cylinder 18 respectively through mass flowmenter 19,20,21,22 is installed, 23 pipeline is connected with mixed air cavity 4; Mix the air cavity outlet and is connected with heater 5 and the main paragraph 8 tested as the carrier of packing in turn, main paragraph exports the blank pipe 9 that runs in; Heater 5 outlets are provided with feedback temperature transducer 6, O
2Voltage stabilizing gas tank 2a, N
2Be respectively equipped with pressure transducer 10a, 10b on the voltage stabilizing gas tank 2b; Above-mentioned feedback is connected with described data collecting card 11 respectively with temperature transducer 6, pressure transducer 10a, 10b and above-mentioned all mass flowmenter 3a, 3b, 19,20,21,22,23.
Referring to Fig. 1, air compressor 1 is air separation machine 26 air feed, and air separation machine 26 is from air separation O
2And N
2Air separation machine is O
2And N
2Voltage stabilizing gas tank and air feed, O
2And N
2Mass flowmenter link to each other with the voltage stabilizing gas tank respectively, control O respectively
2And N
2Flow; O
2Voltage stabilizing gas tank and N
2Be respectively arranged with pressure transducer on the voltage stabilizing gas tank, and pressure signal is delivered to data collecting card and micro computer, in case O
2And N
2The pressure of voltage stabilizing gas tank be lower than O
2And N
2The triggering pressure of mass flowmenter, give air compressor (connecting with ac power supply 13) power supply by micro computer through data capture card control air compressor supply relay, guarantees the pressure that two voltage stabilizing gas tanks are interior, guarantee O
2And N
2The mass flowmenter proper functioning, stability of flow; Gas cylinder 14,15,16,17,18 disposes the mass flowmenter 19,20,21,22,23 of corresponding gas componant respectively, and the flow of control each component gas is with O
2And N
2In mixing air cavity 4, be uniformly mixed into the required gas componant of test, consistent with the ratio of in the engine exhaust component gases; Above-mentioned all mass flowmenters are controlled by data collecting card, micro computer, guarantee each road gas flow; The gas that mixes in the air cavity 4 enters heater 5, and it is temperature required that gas is heated to test, consistent with engine exhaust temperature; Feedback temperature transducer 6 is disposed in heater 5 outlets, temperature signal is through data collecting card 11, by the microcomputerized control collection, microcomputerized control electric power regulator 24(links to each other with ac power supply 13) work, the operating voltage that control enters heater 5 makes that the exit flow temperature maintenance of heater 5 is stable; High-temperature gas directly enters system body section 8, and the performance of the carrier of engine post-treatment apparatus to be measured (being installed in the system body section 8) is tested; Also have differential pressure pickup 7, differential pressure pickup is connected with steam outlet pipe with the suction tude of described main paragraph 8; The signal output part of differential pressure pickup is connected with described data collecting card 11.Pressure difference before and after the main paragraph is measured by differential pressure pickup 7; Main paragraph is discharged gas by emptying pipe 9 direct emptyings.
All mass flowmenter 3a, 3b, 19,20,21,22,23 are the hot-wire mass flowmenter.Heater 5 is axial flow thermic lance heater.The maximum heating temperature of heater 5 is 700 ℃, heater outlet temperature fluctuation＜5 ℃.
Among Fig. 2: 8-1, high temperature incoming flow gas; 8-2, CONCENTRIC REDUCER; 8-3, main paragraph housing; 8-4, carrier are installed housing; 8-5, carrier; 8-6, O RunddichtringO; 8-7, T type outlet (being steam outlet pipe); 8-8, temperature transducer mounting flange; 8-9, cutting ferrule joint; 8-10, bed temperature sensor; 8-11, inlet temperature are surveyed mouth; 8-12, outlet temperature are surveyed mouth; 8-13, inlet gas sample tap; 8-14, exit gas sample tap; 8-15, high-temperature gas outlet.
Referring to Fig. 2, main paragraph 8 structures are: suction tude is welded on the little cephalic par of CONCENTRIC REDUCER 8-2, the major part end of CONCENTRIC REDUCER is connected through flange with columnar main paragraph housing 8-3 front portion, main paragraph housing rear end is connected with a temperature transducer mounting flange 8-8 through bolt, the main paragraph housing is welded with steam outlet pipe on the rear portion, and this steam outlet pipe is vertical with the main paragraph housing; Be provided with the gas sample mouth on suction tude and the steam outlet pipe and survey mouth as temperature sensor mounted temperature; The tubular carrier installation housing 8-4 that is positioned at main paragraph housing, both ends open is connected with the main paragraph housing through flange; Temperature transducer mounting flange 8-8 goes up the uniform pullover 8-9 of a plurality of clampings that is connected with, and each clamping is pullover to be provided with a bed temperature sensor 8-10; Bed temperature sensor 8-10 extend into carrier 8-5 inside from the pullover endoporus of clamping.
Referring to Fig. 2, the carrier 8-5 of after-treatment device is installed on carrier and installs in the housing 8-4, CONCENTRIC REDUCER 8-2 makes carrier 8-5 and carrier that housing 8-4 is installed seals that at mounting point compression O RunddichtringO 8-6 CONCENTRIC REDUCER 8-2 also plays the effect of distribution high temperature incoming flow gas 8-1 simultaneously; Carrier is installed housing 8-4 and is installed in the main paragraph housing 8-3, and the mode that adopts flange to connect connects, seals with CONCENTRIC REDUCER 8-2 and main paragraph housing 8-3 respectively; It is steam outlet pipe that main paragraph housing 8-3 outlet connects T type outlet 8-7(), its left end adopts flange to connect, seal with main paragraph housing 8-3, and its right-hand member connects with temperature transducer mounting flange 8-8, and its upper end is high-temperature gas outlet 8-15; The relevant position of temperature transducer mounting flange 8-8 is offered tapped hole and is used for installing cutting ferrule joint 8-9; Bed temperature sensor 8-10 extend into carrier 8-5 inside from cutting ferrule joint 8-9 endoporus, and (the bed temperature sensor 8-10 that stretches into carrier 8-5 inside is 1 ~ 20.), measure its inside temperature; Bed temperature sensor 8-10 is sealed by cutting ferrule joint 8-9 after being inserted into the inner desired location of carrier 8-5; According to the test needs, can offer a plurality of tapped holes in the relevant position of temperature transducer mounting flange 8-8, temperature field that be used for to measure the inner diverse location of carrier 8-5 (disalignment to radially) distributes; Entrance and exit at main paragraph offers inlet temperature survey mouthful 8-11 and an outlet temperature survey mouthful 8-12 respectively, and inlet gas sample tap 8-13 and outlet sample gas sample tap 8-14, change for detection of out temperature and the gas composition of carrier 8-5 under test conditions.
Regenerability test with diesel engine particle catcher is example below, is further described:
The diesel engine particle catcher carrier is wall-flow honeycomb ceramic filter, size 144mm * 152mm, and the diesel particulation amount that has captured is 5g/L.
Diesel engine condition: discharge capacity 2L, 1600 rev/mins of rotating speeds, 600 ℃ of delivery temperatures.
Diesel exhaust component: O
2Content 8%, CO
2Content 15%, CO content 1000ppm, HC content 600 ppm, NO content 700ppm, NO
2Content 100ppm.
First: the filter carrier is installed on carrier installs in the housing.The housing internal diameter is chosen as 158mm, and being convenient to the installation interface diameter is the pyroceram fibre O RunddichtringO of 25mm, and the CONCENTRIC REDUCER of housing entrance is installed; Shell length is chosen as 320mm, but the longest length of installation is the carrier of 305mm.
Second: determine the carrier inside temperature point, and mounting temperature sensor.Because its inside temperature field distribution information during diesel engine particle catcher regeneration is very important to studying its regenerability; Therefore, need arrange 5 measuring points at least on axially in the centre area of carrier, be respectively entrance, 1/4 length, 2/4 length, 3/4 length and exit position; At least arrange 4 measuring points in radial position, be respectively centre area, 1/3 diameter, 2/3 diameter and position, fringe area; Still arrange temperature point in the radially relevant position of entrance, 2/4 length and exit position simultaneously, altogether 14 measuring points.According to above-mentioned point position, tapped hole is offered in the relevant position on temperature transducer mounting flange 8-8, the cutting ferrule joint is installed is connected temperature transducer simultaneously.
The the 3rd: calculate each gas composition flow.According to diesel engine discharge capacity 2L, 1600 rev/mins of rotating speeds calculate the diesel exhaust gas flow and are about 27L/s; According to O
2Content 8%, CO
2Content 15%, CO content 1000ppm, HC content 600ppm, NO content 700ppm, NO
2Content 100ppm calculates: O
2Flow is 2.16L/s, CO
2Flow is that 4.05L/s, CO flow are 2.7 * 10
-2L/s, HC flow are 1.62 * 10
-2L/s, NO flow are 1.89 * 10
-2L/s, NO
2Flow is 2.7 * 10
-3L/s, all the other are N
2, flow is 20.73L/s.
The 4th: by the control computer program, set a quality flowmeter flow quantity, setting the heater outlet temperature simultaneously is 600 ℃, and open system is tested.
The 5th: the control computer is gathered measuring point signal, especially a filter inside temperature measuring point and front and back pressure drop signal in real time, adopts flue gas analyzer to measure its component content to the sample gas before and after the filter simultaneously.
At last: finish test, analyze image data.
The present invention mainly provides a kind of test simple, economical, various exhaust operating modes that can simulated engine can be carried out the test system of a kind of engine post-treatment apparatus of testing property and exploitation to the after-treatment device (as TWC, DOC, LNT and DPF etc.) of various different geometrical structure parameters.
Some explanation:
1, axial flow thermic lance heater parameter:
Model: thermic lance-200;
Specification: 704 ℃ of maximum heating temperature, maximum heating flow 170 m
3/ h, single heater power 12.5 kW; Required heater quantity: 2;
Producer: the rich Leicester's heat flow system in Changshu Manufacturing Co., Ltd.
2, data collecting card is data acquisition controller:
Parameter and specification: analog input model: NI 9205,32 passages; Simulation output model: NI 9264,16 passages; Communication model: cDAQ-9188;
Producer: the American National instrument (National Instruments, USA).
3, cutting ferrule joint: an axial hole is arranged on the cylinder, be used for the insertion thermocouple, the Cylindrical object front threads is for being screwed on the equipment, and the Cylindrical object rear threads seals to form for spin a plug or block;
Model: MC type;
Specification: through-hole diameter 3 mm (thermocouple of diameter 3 mm is installed);
Producer: Chengdu Lai Feng Science and Technology Ltd..
Claims (7)
1. the test system of an engine post-treatment apparatus comprises, micro computer (25), the data collecting card that is connected with micro computer (11), it is characterized in that air compressor (1) outlet is connected with air separation machine (26), the oxygen outlet of air separation machine and nitrogen outlet respectively with O
2Voltage stabilizing gas tank (2a) and N
2Voltage stabilizing gas tank (2b) connects, O
2Voltage stabilizing gas tank (2a) and N
2The outlet of voltage stabilizing gas tank (2b) pipeline through mass flowmenter (3a, 3b) is installed respectively is connected with mixed air cavity (4); CO
2Gas cylinder (14), CO gas cylinder (15), HC gas gas cylinder (16), NO gas cylinder (17) and NO
2Gas cylinder (18) pipeline through mass flowmenter (19,20,21,22,23) is installed respectively is connected with mixed air cavity (4); Mix the air cavity outlet and is connected with heater (5) and the main paragraph (8) tested as the carrier of packing in turn, main paragraph exports the blank pipe (9) that runs in; Heater (5) outlet is provided with feedback temperature transducer (6), O
2Voltage stabilizing gas tank (2a) and N
2Be respectively equipped with pressure transducer (10a, 10b) on the voltage stabilizing gas tank (2b); Above-mentioned feedback is connected with described data collecting card (11) respectively with temperature transducer (6), pressure transducer (10a, 10b) and above-mentioned all mass flowmenters (3a, 3b, 19,20,21,22,23);
Described main paragraph (8) structure is: suction tude is welded on the little cephalic par of CONCENTRIC REDUCER (8-2), the major part end of CONCENTRIC REDUCER is connected through flange with columnar main paragraph housing (8-3) is anterior, main paragraph housing rear end is connected with a temperature transducer mounting flange (8-8) through bolt, the main paragraph housing is welded with steam outlet pipe on the rear portion, and this steam outlet pipe is vertical with the main paragraph housing; Be provided with the gas sample mouth on suction tude and the steam outlet pipe and survey mouth as temperature sensor mounted temperature; The tubular carrier installation housing (8-4) that is positioned at main paragraph housing, both ends open is connected with the main paragraph housing through flange; Temperature transducer mounting flange (8-8) is gone up uniform a plurality of clampings pullover (8-9), the pullover bed temperature sensor (8-10) that is provided with of each clamping of being connected with; Bed temperature sensor (8-10) extend into carrier (8-5) inside from the pullover endoporus of clamping.
2. the test system of engine post-treatment apparatus according to claim 1 is characterized in that, also has differential pressure pickup (7), and differential pressure pickup is connected with steam outlet pipe with the suction tude of described main paragraph (8); The signal output part of differential pressure pickup is connected with described data collecting card (11).
3. the test system of engine post-treatment apparatus according to claim 2 is characterized in that, described all mass flowmenters (3a, 3b, 19,20,21,22,23) are the hot-wire mass flowmenter.
4. the test system of engine post-treatment apparatus according to claim 3 is characterized in that, described heater (5) is axial flow thermic lance heater.
5. the test system of engine post-treatment apparatus according to claim 4, it is characterized in that, be provided with compressor supply relay (12) in the current supply circuit of described air compressor (1), compressor supply relay (12) is connected with described micro computer (25).
6. according to the test system of the described engine post-treatment apparatus of the arbitrary claim of claim 1～5, it is characterized in that the maximum heating temperature of described heater (5) is 700 ℃, heater outlet temperature fluctuation＜5 ℃.
7. the test system of engine post-treatment apparatus according to claim 6 is characterized in that, the described bed temperature sensor (8-10) that stretches into carrier (8-5) inside is 1～20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100385931A CN102588058B (en) | 2012-02-21 | 2012-02-21 | Testing system for post-processing device of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100385931A CN102588058B (en) | 2012-02-21 | 2012-02-21 | Testing system for post-processing device of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588058A CN102588058A (en) | 2012-07-18 |
| CN102588058B true CN102588058B (en) | 2013-07-10 |
Family
ID=46477208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012100385931A Active CN102588058B (en) | 2012-02-21 | 2012-02-21 | Testing system for post-processing device of engine |
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| CN103867273A (en) * | 2014-04-04 | 2014-06-18 | 北京科领动力科技有限公司 | Device and method for measuring distribution uniformity of reducing agent of diesel engine SCR system |
| CN104500193B (en) * | 2014-12-02 | 2017-07-28 | 同济大学 | A kind of vehicle emission data acquisition analysis system and its processing method |
| CN107870092A (en) * | 2017-11-13 | 2018-04-03 | 上海为默机械科技有限公司 | A kind of testboard bay for simulated engine discharge |
| CN109236438A (en) * | 2018-09-18 | 2019-01-18 | 苏州道捷电子科技有限公司 | A kind of automobile exhaust tube detection device |
| CN113670379A (en) * | 2021-08-13 | 2021-11-19 | 山东交通学院 | Tail gas pollutant emission simulation device and method |
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