CN206545538U - A kind of moving source engine exhaust flow monitoring device - Google Patents
A kind of moving source engine exhaust flow monitoring device Download PDFInfo
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- CN206545538U CN206545538U CN201720234146.1U CN201720234146U CN206545538U CN 206545538 U CN206545538 U CN 206545538U CN 201720234146 U CN201720234146 U CN 201720234146U CN 206545538 U CN206545538 U CN 206545538U
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- blast pipe
- section
- variable cross
- temperature sensor
- differential pressure
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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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Abstract
The utility model discloses a kind of moving source engine exhaust flow monitoring device, it is characterised in that：Including pressure pipeline, differential pressure pickup (2), control unit (3), and temperature sensor (6)；Blast pipe increases variable cross-section, makes exhaust pipe-shaped into big footpath and path, differential pressure pickup (2) and temperature sensor (6) are while be connected to control unit (3)；Differential pressure pickup is connected respectively to the big footpath of blast pipe (4) and blast pipe path (5) by pressure pipeline, and temperature sensor (6) is arranged on blast pipe and obtains delivery temperature；And measure variable cross-section diameter；Obtain pressure difference at blast pipe variable cross-section.The utility model can obtain engine exhaust flow information, learn that extraction flow information provides a kind of feasible solution in the case where not obtaining engine running condition for motor exhaust after-treatment system.
Description
Technical field
The utility model belongs to motor exhaust pollution control field, is related to and calculates extraction flow based on Bernoulli equation
Measuring technology, the situation of engine wastewater mass concentration can not be accurately learnt in particular for after-treatment system.
Background technology
Motor exhaust pollution control needs the accurate quality for knowing pollutant in tail gas, and tail gas sensor is measured at present
Be all volumetric concentration, it is therefore desirable to be accurately known that volumetric concentration could be converted to mass concentration by extraction flow.General hair
Motivation exhaust mass flow calculate need to add by air-mass flow and fuel mass flow and.Therefore after engine is installed additional
Generally require to realize the communication with Engine ECU during processing unit, but there is calculating complexity, it is stagnant to after-treatment device control time
Afterwards the problem of.In this case, a kind of independent method that can accurately measure engine exhaust amount is developed to show
Obtain particularly important.
Utility model content
The utility model mainly solving the technical problems that propose a kind of moving source engine exhaust flow monitoring device, from
And reach the purpose for obtaining engine exhaust flow.
In order to solve the above technical problems, the technical solution of the utility model is as follows：
A kind of moving source engine exhaust flow monitoring device, it is characterised in that：Including pressure pipeline, differential pressure pickup
(2), control unit (3), and temperature sensor (6)；Blast pipe increases variable cross-section, makes exhaust pipe-shaped into big footpath and path, pressure difference
Sensor (2) and temperature sensor (6) are while be connected to control unit (3)；Differential pressure pickup is connected respectively by pressure pipeline
To the big footpath of blast pipe (4) and blast pipe path (5), temperature sensor (6) is arranged on blast pipe and obtains delivery temperature；And measure
Variable cross-section diameter；Obtain pressure difference at blast pipe variable cross-section.
Further, differential pressure pickup has high pressure, low-voltage interface, and it is big to connect blast pipe variable cross-section respectively by pressure pipeline
Footpath and path.
Including pressure pipeline, differential pressure pickup, control unit, the big footpath of blast pipe, blast pipe path and temperature sensor.Row
Tracheae increase variable cross-section diameter forms big footpath and path, so as to realize the change of pressure at expulsion.
The delivery temperature is measured by temperature sensor.
The exhaust gas density is to calculate gained according to delivery temperature.
The pressure difference is directly measured by differential pressure pickup.
The differential pressure pickup is connected with blast pipe by pressure pipeline.
The differential pressure pickup has high pressure, low-voltage interface, and the big footpath of blast pipe variable cross-section is connected respectively by pressure pipeline
And path.
Exhaust gas density, pressure difference, blast pipe variable cross-section sectional area are measured according to the extraction flow and calculates gained, calculates public
Formula is：
Wherein Q is the extraction flow to be calculated, units/kg/s；ρ is exhaust gas density, units/kg/m3；S1、S2For blast pipe
Two sectional areas of variable cross-section, unit m2；Δ p is blast pipe variable cross-section pressure difference, unit pa.
Utility model has following excellent feature：1st, engine can be learnt under conditions of engine operation condition is not obtained
Extraction flow information.2nd, outside independently of engine, any change need not be done to engine.3rd, operation normal to engine does not have
There is any influence.
Brief description of the drawings
Fig. 1 is test principle figure.
Fig. 2 is pressure pipeline in one of blast pipe variable cross-section scheme of installation.
Fig. 3 is pressure pipeline the two of blast pipe variable cross-section scheme of installation.
Description of reference numerals：
1- pressure pipelines
2- differential pressure pickups
3- control units
The big footpath of 4- blast pipes
5- blast pipe paths
6- temperature sensors
Embodiment
As shown in figure 1, a kind of moving source engine exhaust flow monitoring device, including pressure pipeline, differential pressure pickup, control
Unit processed, the big footpath of blast pipe, blast pipe path, temperature sensor.
The temperature sensor is installed at blast pipe variable cross-section.
Determine that the implementation of blast pipe variable cross-section, or the port of export expand first, or the port of export reduces, so as to form exhaust
Manage big footpath and blast pipe path.
Blast pipe variable cross-section diameter is measured, the sectional area of different cross section is calculated.
Delivery temperature is obtained according to temperature sensor, and then calculates exhaust gas density.
Differential pressure pickup measures pressure pipeline two ends pressure difference.
Extraction flow is calculated according to below equation：
Wherein Q is the extraction flow to be calculated, units/kg/s；ρ is exhaust gas density, units/kg/m3；S1、S2For blast pipe
Two sectional areas of variable cross-section, unit m2；Δ p is blast pipe variable cross-section pressure difference, unit Pa.
The device is based on Bernoulli equation principle, the extraction flow of the mobile source engine of monitoring in real time, and the device can be independent
Outside engine, any change need not be done to engine.Using pressure difference, blast pipe variable cross-section sectional area and gas density most
Extraction flow is calculated eventually.Wherein pressure difference is measured using differential pressure pickup, and the sensor has high pressure, low-voltage interface, sensor
It is connected with blast pipe with pressure pipeline.
The present apparatus obtains pressure difference at blast pipe variable cross-section.Delivery temperature, and then the row of calculating are obtained according to temperature sensor
Air tightness；The area of different cross section is calculated according to blast pipe variable cross-section diameter；Waste gas in blast pipe can be calculated according to pressure difference
Mass flow.
Claims (2)
1. a kind of moving source engine exhaust flow monitoring device, it is characterised in that：Including pressure pipeline, differential pressure pickup (2),
Control unit (3), and temperature sensor (6)；Blast pipe increases variable cross-section, makes exhaust pipe-shaped into big footpath and path, pressure difference sensing
Device (2) and temperature sensor (6) are while be connected to control unit (3)；Differential pressure pickup is connected respectively to row by pressure pipeline
The big footpath of tracheae (4) and blast pipe path (5), temperature sensor (6) are arranged on blast pipe and obtain delivery temperature；And measure change section
Face diameter；Obtain pressure difference at blast pipe variable cross-section.
2. device according to claim 1, it is characterised in that：Differential pressure pickup has high pressure, low-voltage interface, passes through pressure
Pipeline connects the big footpath of blast pipe variable cross-section and path respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720234146.1U CN206545538U (en) | 2017-03-12 | 2017-03-12 | A kind of moving source engine exhaust flow monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720234146.1U CN206545538U (en) | 2017-03-12 | 2017-03-12 | A kind of moving source engine exhaust flow monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206545538U true CN206545538U (en) | 2017-10-10 |
Family
ID=59995071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720234146.1U Active CN206545538U (en) | 2017-03-12 | 2017-03-12 | A kind of moving source engine exhaust flow monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN206545538U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061629A (en) * | 2017-12-04 | 2018-05-22 | 潍柴动力股份有限公司 | A kind of Engine exhaust pipeline gas leak detection device and method |
| CN112343698A (en) * | 2020-11-02 | 2021-02-09 | 上海澳羽机电环保设备有限公司 | Engine exhaust flowmeter |
-
2017
- 2017-03-12 CN CN201720234146.1U patent/CN206545538U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061629A (en) * | 2017-12-04 | 2018-05-22 | 潍柴动力股份有限公司 | A kind of Engine exhaust pipeline gas leak detection device and method |
| CN112343698A (en) * | 2020-11-02 | 2021-02-09 | 上海澳羽机电环保设备有限公司 | Engine exhaust flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180604 Address after: 064400 A4 apartment, Jun He Plaza, Qian'an, Tangshan City, Hebei Patentee after: Yue Guangzhao Address before: No. 100, Chaoyang District flat Park, Beijing, Beijing Patentee before: Beijing University of Technology |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181015 Address after: 064499 No. 5468 Xingan Avenue, Qian'an Town, Tangshan City, Hebei Province Patentee after: Hebei Suoqi Automotive Electronic Technology Co. Ltd. Address before: 064400 A4 apartment, Jun He Plaza, Qian'an, Tangshan City, Hebei Patentee before: Yue Guangzhao |