CN105699135A - Engine exhaust particle sampling system and using method thereof - Google Patents
Engine exhaust particle sampling system and using method thereof Download PDFInfo
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- CN105699135A CN105699135A CN201610247639.9A CN201610247639A CN105699135A CN 105699135 A CN105699135 A CN 105699135A CN 201610247639 A CN201610247639 A CN 201610247639A CN 105699135 A CN105699135 A CN 105699135A
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- electromagnetic valve
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- engine exhaust
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2252—Sampling from a flowing stream of gas in a vehicle exhaust
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an engine exhaust particle sampling system and a using method thereof. An inlet end of a main exhaust pipe is connected with an outlet end of an engine exhaust pipe, an outlet end of the main exhaust pipe is connected with a first filter, an exhaust branch pipe is arranged on the main exhaust pipe between a transmitter and the first filter. A flow meter, a flow regulation valve, an electromagnetic valve, a copper net microgrid and a second filter are arranged on the exhaust branch pipe sequentially. The electromagnetic valve is connected with a time relay connected with a transformer, the transformer is connected with a control switch and a power source, the control switch is connected with a clamp and the electromagnetic valve, and the copper net microgrid is arranged in the clamp. The engine exhaust particle sampling system is simple in structure, convenient to operate, quick in response, and accurate in sampling, and sample quality, sampling repeatability and reproducibility can be upgraded.
Description
Technical field
The invention belongs to technical field of internal combustion engines, be specifically related to a kind of engine exhaust particle sampling system and using method thereof。
Background technology
Along with process of industrialization advances, auto industry is fast-developing, the recoverable amount of various motor vehicles is continuously increased, the life of the mankind is brought various facility by automobile without doubt, but its exhaust emissions causes severe contamination but to the atmospheric environment of human lives, and particularly haze weather in recent years causes significant damage to human health。Granular material discharged for limiting vehicle, reduces the harm of its pollution to environment and human body, meets increasingly stricter Abgasgesetz, and in internal combustion engine product design and development, the research about " I. C. engine exhaust particulate matter " becomes focus。For the particle size distribution of I. C. engine exhaust particulate matter, fractal dimension and the property Quality Research such as sight pattern of receiving, the method generally adopting thermogravimetric analysis, Raman analysis, infrared spectrum analysis, these methods need particulate matter is carried out filter paper。
Summary of the invention
Instant invention overcomes shortcoming of the prior art, provide a kind of engine exhaust particle sampling system and using method thereof, sample for engine exhaust particulate matter, it does not have exhaustion dilution system and filtration, condensation, buffer gear etc., simple in construction, cost is low。
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of engine exhaust particle sampling system includes electromotor, main exhaust, the first cleaner, effusion meter, flow control valve, an exhaustor, final cleaner, electromagnetic valve, the time relay, transformator, power supply, control switch, clamper and the micro-grid of copper mesh；
Main exhaust arrival end is connected with the port of export of the exhaust pipe of engine, and the main exhaust port of export and the first cleaner connect, and the main exhaust between transmitter and the first cleaner arranges an exhaustor；An exhaustor sets gradually effusion meter, flow control valve, electromagnetic valve, the micro-grid of copper mesh and final cleaner；
Electromagnetic valve is connected with the time relay, the time relay is connected with transformator, transformator is connected with control switch, and transformator is connected with power supply, controls switch and is connected with clamper, controls switch and is connected with electromagnetic valve, is provided with the micro-grid of copper mesh in clamper。
In technique scheme, effusion meter is integrated type thermal gas flowmeter, for measuring integrated flow and the instantaneous delivery of an exhaustor, and compensates function with digital display and hyperthermic temperature。
In technique scheme, electromagnetic valve is high-temperature gas normally open type magnetic valve；The time relay is the static on-delay class time relay。
Use said system to carry out the sampling of engine exhaust particulate matter, carry out as steps described below:
Step 1, starts electromotor, carries out heat engine under idling operation so that it is stable at target operating condition；
Step 2, according to the instantaneous delivery that effusion meter shows, regulates flow control valve to target flow；
Micro-for copper mesh in clamper grid, after the flow in an exhaustor reaches target operating condition and be stable, are arranged in an exhaustor and make the receiving plane of the micro-grid of copper mesh be perpendicular to gas flow by step 3；
Step 4, when the micro-grid of copper mesh are arranged on and sample in an exhaustor, controls switch Guan Bi, and the time relay postpones to disconnect after powered up, and electromagnetic valve is become cutting out from normally open, and sampling terminates。
In technique scheme, in step 1, target operating condition is maximum power point or maximum engine torque point。
In technique scheme, in step 2, target flow is 1 ± 10%L/s。
In technique scheme, in step 3, energising postpones as the 0.1-9.9 second, it is preferred to the 1-5 second。
Compared with prior art, the invention has the beneficial effects as follows:
1. simple in construction, easy to operate。Sample for engine exhaust particulate matter, it does not have exhaustion dilution system and filtration, condensation, buffer gear etc., simple in construction, cost is low。
2. improve sample quality。Can controlling extraction flow and regulate the sampling time: effusion meter can measure instantaneous delivery and integrated flow, by flow control valve, when making to measure, exhaust flow rate is constant every time；In Circuits System, the energising of the time relay postpones scope at 0.1s-9.9s, according to engine operating condition and environmental factors, formulates different sampling stages control strategy。
3. improve the Repeatability and Reproducibility of sampling。Control extraction flow and after the sampling time, ensure that same operator use the same instrument and equipment repeatability to being made two unitary sampling results under the same terms in same laboratory, and different operating personnel are indoor to the repeatability respectively making unitary sampling result under the same terms in different experiments。
4. electromagnetic valve fast-response, it can be ensured that engine exhaust particulate matter is accurately sampled。
Accompanying drawing explanation
Fig. 1 is the structural representation of inventive engine exhaust particulate sampling system。In figure: 1-electromotor；2-main exhaust；3-the first cleaner；4-effusion meter；5-flow control valve；6-props up exhaustor；7-final cleaner；8-electromagnetic valve；The 9-time relay；10-transformator；11-power supply；12-controls switch；13-clamper；The micro-grid of 14-copper mesh。
Fig. 2 is the transmission electron microscope results schematic diagram (1) of the aerosol sample gathered。
Fig. 3 is the transmission electron microscope results schematic diagram (2) of the aerosol sample gathered。
Fig. 4 is the transmission electron microscope results schematic diagram (3) of the aerosol sample gathered。
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:
A kind of engine exhaust particle sampling system includes electromotor, main exhaust, the first cleaner, effusion meter, flow control valve, an exhaustor, final cleaner, electromagnetic valve, the time relay, transformator, power supply, control switch, clamper and the micro-grid of copper mesh；
Main exhaust arrival end is connected with the port of export of the exhaust pipe of engine, and the main exhaust port of export and the first cleaner connect, and the main exhaust between transmitter and the first cleaner arranges an exhaustor；An exhaustor sets gradually effusion meter, flow control valve, electromagnetic valve, the micro-grid of copper mesh and final cleaner；
Electromagnetic valve is connected with the time relay, the time relay is connected with transformator, transformator is connected with control switch, and transformator is connected with power supply, controls switch and is connected with clamper, controls switch and is connected with electromagnetic valve, is provided with the micro-grid of copper mesh in clamper。
In technique scheme, effusion meter is integrated type thermal gas flowmeter, for measuring integrated flow and the instantaneous delivery of an exhaustor, and compensates function with digital display and hyperthermic temperature。
In technique scheme, electromagnetic valve is high-temperature gas normally open type magnetic valve；The time relay is the static on-delay class time relay, and energising controls the switch of electromagnetic valve time delay, and reference time delay is 0.1s-9.9s；Power supply is 220V alternating current power supply, and transformator is that 220V turns direct current 24V transformator。
In technique scheme, the Universal Number of the micro-grid of copper mesh of use is T11012,200 order circular hole copper mesh, 100/box。
Use said system to carry out the sampling of engine exhaust particulate matter, carry out as steps described below:
Start electromotor, idle running under 900rpm rotating speed, heat engine 30 minutes。Regulate rotating speed and moment of torsion to target operating condition maximum power point。According to the instantaneous delivery that effusion meter shows, regulate flow control valve to 1%L/s。Installing the micro-grid of copper mesh to clamper, placing clamp holder enters an exhaustor, now controls switch Guan Bi, the control circuit being made up of electromagnetic valve, the time relay, transformator, control switch and power supply is started working, the time relay postpones to disconnect after powered up, and closed electromagnetic valve, sampling terminates。Take out the micro-grid of copper mesh in clamper, put into Storage Box, detect in order to follow-up transmission electron microscope。
In engine exhaust granule sampling process, sample for use in transmitted electron microscope quality is had a significant impact by sampling time and extraction flow。Sampling time is long, and on sample, particulate matter can produce stacking, the impact measurement to data targets such as particle size size, fractal dimensions, adopts and postpones 30s, obtain as shown in Figure 2 in above-mentioned implementation。Sampling time is short, particulate matter negligible amounts on sample, when transmission electron microscope is observed, is not easy to select representative particle thing, adopts and postpones 0.1s, as shown in Figure 3 in above-mentioned implementation。After controlling sampling time and extraction flow, air-flow is made to reach 1%L/s, when sampling time (time delay) is 5 seconds, particulate matter number on sample can be made to ensure in certain limit, effective control aerosol sample will not produce impact observation stacking, without appearance seldom even without the situation of particulate matter。As shown in Figure 4。
Above the present invention is described in detail, but described content has been only presently preferred embodiments of the present invention, it is impossible to be considered the practical range for limiting the present invention。All equalizations made according to the present patent application scope change and improvement etc., all should still belong within the patent covering scope of the present invention。
Claims (7)
1. an engine exhaust particle sampling system, is characterized in that: include electromotor, main exhaust, the first cleaner, effusion meter, flow control valve, an exhaustor, final cleaner, electromagnetic valve, the time relay, transformator, power supply, control switch, clamper and the micro-grid of copper mesh；
Main exhaust arrival end is connected with the port of export of the exhaust pipe of engine, and the main exhaust port of export and the first cleaner connect, and the main exhaust between transmitter and the first cleaner arranges an exhaustor；An exhaustor sets gradually effusion meter, flow control valve, electromagnetic valve, the micro-grid of copper mesh and final cleaner；
Electromagnetic valve is connected with the time relay, the time relay is connected with transformator, transformator is connected with control switch, and transformator is connected with power supply, controls switch and is connected with clamper, controls switch and is connected with electromagnetic valve, is provided with the micro-grid of copper mesh in clamper。
2. a kind of engine exhaust particle sampling system according to claims 1, is characterized in that: effusion meter is integrated type thermal gas flowmeter, for measuring integrated flow and the instantaneous delivery of an exhaustor, and compensates function with digital display and hyperthermic temperature。
3. a kind of engine exhaust particle sampling system according to claims 1, is characterized in that: electromagnetic valve is high-temperature gas normally open type magnetic valve, and the time relay is the static on-delay class time relay, and energising controls the switch of electromagnetic valve time delay。
4. a using method for engine exhaust particle sampling system, is characterized in that: carry out as steps described below:
Step 1, starts electromotor, carries out heat engine under idling operation so that it is stable at target operating condition；
Step 2, according to the instantaneous delivery that effusion meter shows, regulates flow control valve to target flow；
Micro-for copper mesh in clamper grid, after the flow in an exhaustor reaches target operating condition and be stable, are arranged in an exhaustor and make the receiving plane of the micro-grid of copper mesh be perpendicular to gas flow by step 3；
Step 4, when the micro-grid of copper mesh are arranged on and sample in an exhaustor, controls switch Guan Bi, and the time relay postpones to disconnect after powered up, and electromagnetic valve is become cutting out from normally open, and sampling terminates。
5. the using method of a kind of engine exhaust particle sampling system according to claims 4, is characterized in that in step 1, and target operating condition is maximum power point or maximum engine torque point。
6. the using method of a kind of engine exhaust particle sampling system according to claims 4, is characterized in that in step 2, and target flow is 1 ± 10%L/s。
7. the using method of a kind of engine exhaust particle sampling system according to claims 4, in step 3, energising postpones as the 0.1-9.9 second, it is preferred to the 1-5 second。
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| CN201610247639.9A CN105699135A (en) | 2016-04-20 | 2016-04-20 | Engine exhaust particle sampling system and using method thereof |
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| CN201610247639.9A CN105699135A (en) | 2016-04-20 | 2016-04-20 | Engine exhaust particle sampling system and using method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489984A (en) * | 2018-12-20 | 2019-03-19 | 西安交通大学 | A kind of engine exhaust gas particulate part diluted stream device and its application method |
| CN110044664A (en) * | 2019-04-30 | 2019-07-23 | 江苏大学 | A kind of particle sampling device based on thermophoretic effect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489984A (en) * | 2018-12-20 | 2019-03-19 | 西安交通大学 | A kind of engine exhaust gas particulate part diluted stream device and its application method |
| CN110044664A (en) * | 2019-04-30 | 2019-07-23 | 江苏大学 | A kind of particle sampling device based on thermophoretic effect |
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Application publication date: 20160622 |