CN206146647U - Automobile exhaust flow measurement control system - Google Patents
Automobile exhaust flow measurement control system Download PDFInfo
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- CN206146647U CN206146647U CN201620921718.9U CN201620921718U CN206146647U CN 206146647 U CN206146647 U CN 206146647U CN 201620921718 U CN201620921718 U CN 201620921718U CN 206146647 U CN206146647 U CN 206146647U
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- vehicle
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- control computer
- exhaust flow
- control system
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Abstract
The utility model discloses an automobile exhaust flow measurement control system, including chassis dynamometer, constant volume sampling unit, emission analysis appearance and master control computer. The vehicle that will await measuring is earlier opened to the chassis dynamometer on, with negative -pressure air fan run -on trachea, an information of picking up the car is swept to the barcode reader, simulate the actual loading of vehicle on the road that await measuring, negative -pressure air fan passes through tail gas in the sampling pipe suction venturi, combine the emission analysis appearance, measure venturi's the inlet cross -section and the pressure differential of minimum cross -section department, ask outflow with the bernoulli theorem, the driver is according to the program operation of the master control computer vehicle that awaits measuring, after the master control computer analytical calculation result, the automatic server of uploading of vehicle information and the test report of will awaiting measuring. The utility model discloses increase venturi automatic switching control equipment on the basis of existing equipment, according to the car of different discharge capacities, select different venturi, through the flow that reduces venturi, reduce the dilution air inlet, improve the concentration of tail gas, both can improve the measuring precision.
Description
Technical field
This utility model is related to automotive field, more particularly to a kind of vehicle exhaust flow measurement control system.
Background technology
Simple exhaust system for motor vehicles or engine discharging tail gas be made to determine whether by quality it is exceeded.Which passes through
Constant-volume sampling systematic survey goes out the flow of tail gas, calculates exhaust volume according to the time of measurement；Tail is measured by emission analyzer
The concentration of gas；Volume is multiplied with concentration and calculates quality.As the temperature of tail gas is very high, need by dilute into before Venturi tube
Release air to be lowered the temperature.On the one hand the quality of pollutant after tail gas is mixed with air is measured in measurement process, on the one hand individually
The quality of measurement pollutants in air, two quality subtract each other the quality for obtaining gas pollutant.
In view of the continuous of vehicular emission standards adds sternly at present, seldom, especially vehicle is started the quality for discharging pollutants
Afterwards, under conditions of work, tail gas is difficult to measure ternary catalyzing unit.Emission measuring can be improved by two methods typically
Precision, one, by improve emission analyzer precision, using the analyser of low concentration range.2nd, by the stream of reduction Venturi tube
Amount, reduces diluent air combined amount, improves the measurement concentration of tail gas.The first scheme is related to change measuring apparatus, and cost is high,
It is unsuitable for promoting and reduces cost.
Utility model content
In order to overcome the deficiencies in the prior art, this utility model to provide a kind of vehicle exhaust flow measurement control system, its
Constant-volume sampling unit introduces core measurement apparatus-Venturi tube, and Venturi tube is first to shrink the pipeline for then gradually expanding, and is measured
Pressure differential at its entrance section and smallest cross-sectional, can obtain flow with Bernoulli's theorem.
For this purpose, this utility model provides a kind of vehicle exhaust flow measurement control system, for measuring the tail of vehicle to be measured
Throughput, including chassis dynamometer, constant-volume sampling unit, emission analyzer and main control computer.
Vehicle to be measured is opened on the chassis dynamometer.
One end of constant-volume sampling unit is connected to the exhaustor of vehicle to be measured, and the other end is connected to emission analyzer.
Main control computer is connected with chassis dynamometer, constant-volume sampling unit and emission analyzer signal respectively.
The constant-volume sampling unit includes negative-pressure air fan, sampling tube, the Venturi tube of multiple different ranges and automatic switchover
Device, automatic switching control equipment Venturi tube connection respectively from multiple different ranges, the negative-pressure air fan and vehicle to be measured
Exhaustor connection, by tail gas by sampling tube suction Venturi tube.
Further, also vehicle to be measured is locked with restraint device by chain or bandage including restraint device.
Further, also it is connected with main control computer signal including barcode reader, for quick in master control before experiment
Information of vehicles to be measured is read in computer.
Further, also help including driver, be connected with main control computer, it is aobvious for the test loop of main control computer is shown in
Show on device, shift time and speed of the driver according to the curve controlled vehicle for showing.
Compared with prior art, this utility model increases Venturi tube automatic switching control equipment on the basis of existing equipment,
According to the car of different displacements, different Venturi tubes are selected, by the flow for reducing Venturi tube, reduce diluent air and enter
Amount, improves the concentration of tail gas, can both improve the precision of measurement.
Description of the drawings
A kind of structural representation of vehicle exhaust flow measurement control system that Fig. 1 is provided for this utility model, wherein：
1- vehicles to be measured, 2- chassis dynamometers, 3- constant-volume sampling units, 31- Venturi tubes, 32- sampling tubes, 4- discharges point
Analyzer.
Specific embodiment
Below in conjunction with the accompanying drawings embodiment of the present utility model is described in detail.
Fig. 1 is referred to, this utility model provides a kind of vehicle exhaust flow measurement control system, for measuring vehicle to be measured
1 exhaust flow, including chassis dynamometer 2, constant-volume sampling unit 3, emission analyzer 4, main control computer (not shown), about get one's things ready
Put (not shown), barcode reader (not shown) and driver and help (not shown).
Vehicle to be measured 1 is opened to the chassis dynamometer, vehicle to be measured 1 is locked with restraint device by chain or bandage
Tightly.Vehicle front to be measured heads on blower fan for the wind speed that simulating vehicle is travelled on road, and blower fan can be with chassis dynamometer 2
Synchronization, the rotating speed of 2 rotary drum of chassis dynamometer are consistent with the rotating speed of wheel, by way of inertia is loaded simulate vehicle to be measured
Actual loading on road.
One end of constant-volume sampling unit 3 is connected to the exhaustor of vehicle to be measured 1, and the other end is connected to emission analyzer 4.
Main control computer is connected with chassis dynamometer 2, constant-volume sampling unit 3 and 4 signal of emission analyzer respectively, for the bottom of to
Disk dynamometer machine 2, constant-volume sampling unit 3 and emission analyzer 4 send control command and calculating are analyzed to measurement result.
The constant-volume sampling unit 3 includes negative-pressure air fan (not shown), sampling tube 32, the Venturi tube of various different ranges
3 and automatic switching control equipment (not shown), the automatic switching control equipment is connected from the Venturi tube 3 of multiple different ranges respectively, is used
In the car according to different displacements, different Venturi tubes 3, the negative-pressure air fan are selected to be connected with the exhaustor of vehicle to be measured 1, will
Tail gas reduces diluent air combined amount by 32 suction Venturi tube 31 of sampling tube by the flow for reducing Venturi tube 31,
Improve the measurement concentration of tail gas.
Barcode reader is connected with main control computer signal, treats measuring car for quick the reading in main control computer before experiment
Information.
Driver is helped and is connected with main control computer, and for the test loop of main control computer is shown in display, driver presses
According to the shift time and speed of the curve controlled vehicle for showing.
During detection, comprise the steps：
S1, vehicle to be measured is opened to chassis dynamometer, vehicle is locked with restraint device with chain or bandage；
S2, the exhaustor that the negative-pressure air fan of constant-volume sampling unit is connected vehicle to be measured；
S3, barcode reader are swept and take information of vehicles；
The actual loading of S4, simulation vehicle to be measured on road；
S5, negative-pressure air fan are by tail gas by sampling tube suction Venturi tube；
S6, emission analyzer is combined, measure the pressure differential at the entrance section and smallest cross-sectional of Venturi tube, use Bernoulli Jacob
Theorem can obtain flow；
S7, driver according to main control computer procedure operation vehicle to be measured, by automatic switching control equipment according to different displacements
Car, select different Venturi tubes, reduce diluent air combined amount, improve the measurement concentration of tail gas；
After S8, main control computer analysis result, by information of vehicles to be measured and the automatic upload server of test report；
After S9, off-test, constraint relief device and constant-volume sampling unit, vehicle sail out of chassis dynamometer.
Whole test process monitoring camera is whole to be shot, and upload server.
To sum up, this utility model increases Venturi tube automatic switching control equipment on the basis of existing equipment, according to different rows
The car of amount, selects different Venturi tubes, by the flow for reducing Venturi tube, reduces diluent air inlet, improves tail gas
Concentration, can both improve the precision of measurement.
The above, only this utility model preferably specific embodiment, but protection domain of the present utility model is not
Be confined to this, any those familiar with the art in the technical scope that this utility model is disclosed, according to this practicality
New technical scheme and its utility model design in addition equivalent or change, should all cover in protection model of the present utility model
Within enclosing.
Claims (5)
1. a kind of vehicle exhaust flow measurement control system, for measuring the exhaust flow of vehicle to be measured, it is characterised in that include
Chassis dynamometer, constant-volume sampling unit, emission analyzer and main control computer, wherein：
Vehicle to be measured is opened on the chassis dynamometer；
One end of constant-volume sampling unit is connected to the exhaustor of vehicle to be measured, and the other end is connected to emission analyzer；
Main control computer is connected with chassis dynamometer, constant-volume sampling unit and emission analyzer signal respectively；
The constant-volume sampling unit includes negative-pressure air fan, sampling tube, the Venturi tube of multiple different ranges and automatic switching control equipment,
The automatic switching control equipment is connected from the Venturi tube of multiple different ranges respectively, the aerofluxuss of the negative-pressure air fan and vehicle to be measured
Pipe connects, by tail gas by sampling tube suction Venturi tube.
2. a kind of vehicle exhaust flow measurement control system according to claim 1, it is characterised in that also including about getting one's things ready
Put, vehicle to be measured is locked with restraint device by chain or bandage.
3. a kind of vehicle exhaust flow measurement control system according to claim 1, it is characterised in that also including bar code
Reader, is connected with main control computer signal, for information of vehicles to be measured is read in main control computer quickly before experiment.
4. a kind of vehicle exhaust flow measurement control system according to claim 1, it is characterised in that also connect including OBD
Mouthful, water temperature, the discharge fault alarm parameter of vehicle to be measured are read by OBD interfaces.
5. a kind of vehicle exhaust flow measurement control system according to claim 1, it is characterised in that also including driver
Help, be connected with main control computer, for the test loop of main control computer is shown in display, driver is according to the curve for showing
The shift time and speed of control vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620921718.9U CN206146647U (en) | 2016-08-23 | 2016-08-23 | Automobile exhaust flow measurement control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620921718.9U CN206146647U (en) | 2016-08-23 | 2016-08-23 | Automobile exhaust flow measurement control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206146647U true CN206146647U (en) | 2017-05-03 |
Family
ID=58628079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620921718.9U Active CN206146647U (en) | 2016-08-23 | 2016-08-23 | Automobile exhaust flow measurement control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206146647U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443453A (en) * | 2018-12-29 | 2019-03-08 | 阿为特自动化科技（常熟）有限公司 | A kind of test device of constant volume sampler |
| CN109945923A (en) * | 2019-03-22 | 2019-06-28 | 湖北文理学院 | A kind of vehicle mounted tail gas discharge measuring fexible unit |
-
2016
- 2016-08-23 CN CN201620921718.9U patent/CN206146647U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443453A (en) * | 2018-12-29 | 2019-03-08 | 阿为特自动化科技（常熟）有限公司 | A kind of test device of constant volume sampler |
| CN109443453B (en) * | 2018-12-29 | 2024-04-05 | 昆山优合自动化科技有限公司 | Testing device of constant volume sampler |
| CN109945923A (en) * | 2019-03-22 | 2019-06-28 | 湖北文理学院 | A kind of vehicle mounted tail gas discharge measuring fexible unit |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215200 east of Shunfeng Road West of Longqiao Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: Huaye Testing Technology Service Co.,Ltd. Address before: 215200 No. 368, yunchuang Road, Wujiang District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUAYE DETECTION TECHNOLOGY SERVICE Co.,Ltd. |