CN201004045Y - Particle onboard exhaust measurement system - Google Patents
Particle onboard exhaust measurement system Download PDFInfo
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- CN201004045Y CN201004045Y CNU2007200952039U CN200720095203U CN201004045Y CN 201004045 Y CN201004045 Y CN 201004045Y CN U2007200952039 U CNU2007200952039 U CN U2007200952039U CN 200720095203 U CN200720095203 U CN 200720095203U CN 201004045 Y CN201004045 Y CN 201004045Y
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Abstract
The utility model discloses a grain vehicle let testing system, comprising an exhausting flowmeter, a sampling diluter and a grain concentration tester; wherein the exhausting flowmeter, the sampling diluter and the grain concentration tester are connected to each other in order; the exhausting flowmeter and the grain concentration tester are respectively connected to a data recorder and a processing device through leads. The exhausting flowmeter comprises a shell which is provided with a pressure difference sensor at an inlet side; whereas the outlet side of the exhausting flowmeter is provided with an absolute pressure sensor; a temperature sensor is positioned between the absolute pressure sensor and the pressure difference sensor; and the pressure difference sensor, the absolute pressure sensor and the temperature sensor are all respectively connected to the data recorder and the processing device through leads. The utility model is simple in structure, convenient to be utilized and realizes testing the grain letting gross of a vehicle, thus deeply understanding the letting characteristics from a vehicle to the roads, further playing a crucial role of setting up an effective controlling strategy.
Description
Technical field
The utility model relates to a kind of vehicle exhaust measurement mechanism, particularly relates to a kind of particle on-board emission measurement system that can realize based on the road vehicle emission performance of real running environment.
Background technology
The on-board emission test technology is a kind of device that can measure the discharging of real road driving vehicle in real time.On-board emission test technology for the discharging gaseous contaminant is ripe, but because the measurement of particle not only will solve the consistance based on the filter paper Weighing method with Abgasgesetz, and realize measuring in real time, but also to solve the composition of particle and the polytrope problem of quality.So the on-board emission measurement for particle still is in conceptual phase substantially, feasible and proven technique means are not arranged also all both at home and abroad.
Vehicular emission testing laboratory detection method based on chassis dynamometer, engine pedestal is that we understand the important basic means of all types of vehicular discharge levels exactly.But the limitation of testing laboratory's detection means is:
(1), can only measure the emission level of (as NEDC, FTP75 etc.) vehicle under the specific operation according to the rules measuring method of testing laboratory for Light-duty Vehicle.These operating modes are to develop at specific area and particular environment, are difficult to the operating mode situation of reproduction real road complexity.The vehicular discharge measurement data that this means are obtained can only show that vehicle is at the emissions status under the Pretesting operating mode.And in the actual use of vehicle, zones of different varying environment condition, the difference of the driving cycle of vehicle, these factors all can produce material impact to the vehicular discharge level.Big quantity research shows that the discharge value that the road driving discharge value of city vehicle reality is measured gained than testing laboratory under the rules program is much higher.
(2) for heavy goods vehicles, the Engine Block Test circulation of stipulating in the existing heavy goods vehicles Abgasgesetz of China is to follow European ECE R49 13-mode test cycle.This method of testing is just measured the discharging of engine at 13 operating points.Even if (2008) carry out EUROIII Emission Standard in the future---heavy-duty engine is carried out steady state test circulation (ESC) and transient test circulation (ETC), and it is also very limited that it measures the working condition measurement coverage rate.
(3) for heavy motor vehicle driven by mixed power, because it is on the conventional engine basis, increase and disposed a cover power assist apparatus, this device is designed to the actual travel operating mode according to vehicle, take control strategy targetedly, realize automobile energy-saving and reduce the purpose of discharging.For this vehicle, single on structure (many a cover power assist apparatus), estimate just improper according to engine; Owing to the work of auxiliary power unit, the actual operating mode of engine distributes and European stable state circulation (ESC) differs greatly, and is inappropriate so the discharging of motor vehicle driven by mixed power reality is only estimated according to the engine emission level still more.
Measure the problem that the vehicular emission detection means exists in order to solve testing laboratory, research vehicle real road emission performance, the concrete emission behaviour of quantification city vehicle.Urgently need to use the on-board emission test technology to carry out the measurement and the assessment of road vehicle emission behaviour, thereby realized research based on the road vehicle emission performance of real running environment.Help us to understand the moving source discharging to the air-polluting share rate from macroscopic view; Analyze the vehicular discharge of dissimilar vehicles under various operating modes, thereby understand vehicle real road emission performance in depth; And then, play an important role for formulating effective control strategy.
Summary of the invention
Technical problem to be solved in the utility model is that a kind of particle on-board emission measurement system that can realize based on the road vehicle emission performance of real running environment is provided.
The technical scheme that the utility model adopted is: a kind of particle on-board emission measurement system, include particle concentration tester, exhaust flow-meter, the sampling diluter, data recording and treating apparatus, wherein, exhaust flow-meter, sampling diluter, particle concentration tester are in turn connected to form the gas flow path; Exhaust flow-meter links to each other with data recording and treating apparatus by lead respectively with particle concentration tester.
Described exhaust flow-meter includes housing, and the housing that is positioned at exhaust flow-meter air intake opening one side is provided with differential pressure pickup; The housing that is positioned at exhaust flow-meter gas outlet one side is provided with absolute pressure transducer; Housing between differential pressure pickup and the absolute pressure transducer is provided with temperature sensor, and differential pressure pickup, temperature sensor and absolute pressure transducer link to each other with data recording and treating apparatus by lead respectively.
Described differential pressure pickup includes stagnation pressure tube and static tube, wherein, one end of stagnation pressure tube is fixed on the sidewall of housing, and the other end radially is connected on the corresponding side walls along housing, and has the pressure port of a plurality of measurement fluid stagnation pressures on the flow path direction meeting of stagnation pressure tube; Static tube is fixed on the sidewall of housing, and has the pressure port of the measurement hydrostatic pressure opposite with direction of flow.
Described temperature sensor adopts thermopair.
Particle on-board emission measurement of the present utility model system, simple in structure, easy to use, realized measurement to the granular material discharged total amount of vehicle, thereby realized research based on the road vehicle emission performance of real running environment, and use the on-board emission test technology to carry out the measurement and the assessment of road vehicle emission behaviour, analyze the vehicular discharge of dissimilar vehicles under various operating modes, thereby understand vehicle real road emission performance in depth; And then, play an important role for formulating effective control strategy.
Description of drawings
Fig. 1 is the utility model system architecture synoptic diagram;
Fig. 2 is the structural representation of the exhaust flow-meter in the utility model.
Wherein:
1: vehicle exhaust gas outlet 2: exhaust flow-meter
3: sampling diluter 4: particle concentration tester
5: data recording and treating apparatus 6: housing
7: differential pressure pickup 8: temperature sensor
9: absolute pressure transducer 10: air intake opening
11: gas outlet 12: stagnation pressure tube
13: static tube P
1: the fluid stagnation pressure
P
2: hydrostatic pressure
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify the utility model and how to realize.
As shown in Figure 1, particle on-board emission measurement of the present utility model system, include particle concentration tester (ELPI) 4, exhaust flow-meter 2, sampling diluter 3, data recording and treating apparatus 5, wherein, exhaust flow-meter 2, sampling diluter 3, particle concentration tester 4 are in turn connected to form the gas flow path; Exhaust flow-meter 2 links to each other with data recording and treating apparatus 5 by lead respectively with particle concentration tester 4.The air intake opening 10 of exhaust flow-meter 2 is connected on the vehicle exhaust gas outlet 1.
ELPI (Electrical Low Pressure Impactor) is the equipment that is used for monitoring and can measuring in real time the granular material discharged concentration of transient state that Finland DEKATI produces, and its resolution reaches a second level.It can measure aerodynamic diameter (Aerodynamic diameter, Dp) particle between 28nm～9.9 μ m.And reload filtration grade, the particle minimum grain size that can test can reach 7nm.Particle particle diameter with every grade of absorptivity 50% is a mark, and one is divided into 13 grades.
In the test process, tail gas needs through heating dilution (the general two-stage dilution that adopts of test) before being drawn into ELPI.Gas after the dilution is in arc chamber, and during through single positive polarity charge electric appliance, the ion that corona discharge produces makes the particle in the sample gas charged.Afterwards, falling in totally 13 grades the cascade ram.The charged particle thing of different-grain diameter size can be collected by different bump levels in the dropping process because the inertia difference, and analyser is according to current signal size at different levels, thereby measures the particle number and the mass concentration of different-grain diameter.
Because ELPI equipment can only be measured the concentration of particle, only it is not enough measuring concentration for vehicle-mounted discharge, also to measure extraction flow, could realize measurement to granular material discharged total amount, thereby draw the particle situation that the vehicle real road travels and discharges, realize the purpose that complete vehicle-mounted particulate emission is measured.So also adopted exhaust flow-meter in the present invention.
As shown in Figure 2, described exhaust flow-meter 2 adopts pitot tube (Pitot) flowmeter, includes housing 6, and the housing 6 that is positioned at exhaust flow-meter air intake opening 10 1 sides is provided with differential pressure pickup 7; The housing 6 that is positioned at exhaust flow-meter gas outlet 11 1 sides is provided with absolute pressure transducer 9; Housing 6 between differential pressure pickup 7 and the absolute pressure transducer 9 is provided with temperature sensor 8, and differential pressure pickup 7, temperature sensor 8 and absolute pressure transducer 9 link to each other with data recording and treating apparatus 5 by lead respectively.Described temperature sensor 8 adopts thermopair.
Described differential pressure pickup 7 includes stagnation pressure tube 12 and static tube 13.Wherein, an end of stagnation pressure tube 12 is fixed on the sidewall of housing 6, and the other end radially is connected on the corresponding side walls along housing 6, and has the pressure port of a plurality of measurement fluid stagnation pressure P1 on the flow path direction meeting of stagnation pressure tube 12; Static tube 13 is fixed on the sidewall of housing 6, and has the pressure port of the measurement hydrostatic pressure P2 opposite with direction of flow, and the pressure reduction that two thief holes are measured is used for calculating extraction flow.
Thereby draw the calculating of gas flow rate:
According to Bernoulli equation
(formula 1)
In the formula: P1: stagnation pressure [KPa]; ρ is gas density [g/m3];
P2: static pressure [KPa]; Q
Exh (t): gas flow rate [m3/min];
Δ h (t): pressure reduction [KPa];
Then
K:Pitot pipe calibration coefficient in the formula.(formula 2)
So: the general equation formula is:
In the formula: Q
Exh (t): the gas flow rate under the standard state [m3/min];
Pexh (t): the discharge pressure that records by absolute pressure transducer;
Texh (t): the delivery temperature of measurement [K]
Annotate: the ρ in the system is meant the density at the exhaust gas of standard state, and default value is 1.20kg/m3 and particle calculation of total method is:
The real-time mass emission of particle (the g/s)=real-time particle quality concentration (g/m that measures
3) * diluter dilution ratio * extraction flow (is converted into m
3/ s).
In the particle on-board emission measurement of the present utility model system: the model that particle concentration tester adopts Finland DEKATI to produce is: the product of ELPI; The model that sampling diluter Finland DEKATI produces is: the product of Diluter L7; The model that absolute pressure transducer adopts Japanese SMC to produce is: the product of PSE510.
Claims (4)
1. particle on-board emission measurement system, include particle concentration tester (4), it is characterized in that, also be provided with exhaust flow-meter (2), sampling diluter (3), data recording and treating apparatus (5), wherein, exhaust flow-meter (2), sampling diluter (3), particle concentration tester (4) are in turn connected to form the gas flow path; Exhaust flow-meter (2) links to each other with data recording and treating apparatus (5) by lead respectively with particle concentration tester (4).
2. particle on-board emission measurement according to claim 1 system is characterized in that described exhaust flow-meter (2) includes housing (6), and the housing (6) that is positioned at exhaust flow-meter air intake opening (10) one sides is provided with differential pressure pickup (7); The housing (6) that is positioned at exhaust flow-meter gas outlet (11) one sides is provided with absolute pressure transducer (9); Housing (6) between differential pressure pickup (7) and the absolute pressure transducer (9) is provided with temperature sensor (8), and differential pressure pickup (7), temperature sensor (8) and absolute pressure transducer (9) link to each other with data recording and treating apparatus (5) by lead respectively.
3. particle on-board emission measurement according to claim 2 system, it is characterized in that, described differential pressure pickup (7) includes stagnation pressure tube (12) and static tube (13), wherein, one end of stagnation pressure tube (12) is fixed on the sidewall of housing (6), the other end radially is connected on the corresponding side walls along housing (6), and has a plurality of measurement fluid stagnation pressure (P on the flow path direction meeting of stagnation pressure tube (12)
1) pressure port; Static tube (13) is fixed on the sidewall of housing (6), and has the measurement hydrostatic pressure (P opposite with direction of flow
2) pressure port.
4. particle on-board emission measurement according to claim 2 system is characterized in that, described temperature sensor (8) adopts thermopair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200952039U CN201004045Y (en) | 2007-02-07 | 2007-02-07 | Particle onboard exhaust measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200952039U CN201004045Y (en) | 2007-02-07 | 2007-02-07 | Particle onboard exhaust measurement system |
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| Publication Number | Publication Date |
|---|---|
| CN201004045Y true CN201004045Y (en) | 2008-01-09 |
Family
ID=39039586
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200952039U Expired - Fee Related CN201004045Y (en) | 2007-02-07 | 2007-02-07 | Particle onboard exhaust measurement system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102770745A (en) * | 2010-02-26 | 2012-11-07 | 罗伯特·博世有限公司 | Device for measuring a particle concentration in motor vehicle exhaust gases |
| CN103134688A (en) * | 2011-11-24 | 2013-06-05 | 北汽福田汽车股份有限公司 | Whole-flow emission testing system and diesel engine testing system |
| CN103543016A (en) * | 2013-10-18 | 2014-01-29 | 联合汽车电子有限公司 | Complete vehicle operating-mode exhaust gas emission testing system |
| CN104237093A (en) * | 2014-10-11 | 2014-12-24 | 北京市环境保护科学研究院 | Road traffic rising dust control measure effect evaluation system and method |
| CN106053306A (en) * | 2016-05-31 | 2016-10-26 | 北京理工大学 | Large pollution source exhaust emission test system |
| CN106092840A (en) * | 2016-05-31 | 2016-11-09 | 北京理工大学 | A kind of large-scale waste gas of pollutant emission test method |
| CN106525154A (en) * | 2016-09-30 | 2017-03-22 | 张英志 | Measurement device for tail gas flow exhausted by car under actual driving condition |
| CN109141547A (en) * | 2018-06-26 | 2019-01-04 | 山西天地王坡煤业有限公司 | Orifice flowmeter |
| CN111397798A (en) * | 2020-03-11 | 2020-07-10 | 中汽研汽车检验中心（天津）有限公司 | Test method for verifying pressure difference data consistency of DPF of vehicle-mounted remote terminal |
-
2007
- 2007-02-07 CN CNU2007200952039U patent/CN201004045Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102770745A (en) * | 2010-02-26 | 2012-11-07 | 罗伯特·博世有限公司 | Device for measuring a particle concentration in motor vehicle exhaust gases |
| CN102770745B (en) * | 2010-02-26 | 2016-03-23 | 罗伯特·博世有限公司 | For measuring the device of the granule density of motor vehicle exhaust gases |
| CN103134688A (en) * | 2011-11-24 | 2013-06-05 | 北汽福田汽车股份有限公司 | Whole-flow emission testing system and diesel engine testing system |
| CN103134688B (en) * | 2011-11-24 | 2016-03-16 | 北汽福田汽车股份有限公司 | Full stream emission testing system and diesel motor pilot system |
| CN103543016B (en) * | 2013-10-18 | 2016-09-28 | 联合汽车电子有限公司 | Car load condition tail gas system for testing discharge |
| CN103543016A (en) * | 2013-10-18 | 2014-01-29 | 联合汽车电子有限公司 | Complete vehicle operating-mode exhaust gas emission testing system |
| CN104237093A (en) * | 2014-10-11 | 2014-12-24 | 北京市环境保护科学研究院 | Road traffic rising dust control measure effect evaluation system and method |
| CN106053306A (en) * | 2016-05-31 | 2016-10-26 | 北京理工大学 | Large pollution source exhaust emission test system |
| CN106092840A (en) * | 2016-05-31 | 2016-11-09 | 北京理工大学 | A kind of large-scale waste gas of pollutant emission test method |
| CN106092840B (en) * | 2016-05-31 | 2017-05-03 | 北京理工大学 | Method for testing exhaust gas discharge of large pollution source |
| CN106053306B (en) * | 2016-05-31 | 2017-05-03 | 北京理工大学 | Large pollution source exhaust emission test system |
| CN106525154A (en) * | 2016-09-30 | 2017-03-22 | 张英志 | Measurement device for tail gas flow exhausted by car under actual driving condition |
| CN109141547A (en) * | 2018-06-26 | 2019-01-04 | 山西天地王坡煤业有限公司 | Orifice flowmeter |
| CN111397798A (en) * | 2020-03-11 | 2020-07-10 | 中汽研汽车检验中心（天津）有限公司 | Test method for verifying pressure difference data consistency of DPF of vehicle-mounted remote terminal |
| CN111397798B (en) * | 2020-03-11 | 2021-06-25 | 中汽研汽车检验中心（天津）有限公司 | Test method for verifying pressure difference data consistency of DPF of vehicle-mounted remote terminal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 |