CN112697442A - Testing precision comparison method for PEMS equipment and bench emission testing equipment - Google Patents
Testing precision comparison method for PEMS equipment and bench emission testing equipment Download PDFInfo
- Publication number
- CN112697442A CN112697442A CN202011515491.5A CN202011515491A CN112697442A CN 112697442 A CN112697442 A CN 112697442A CN 202011515491 A CN202011515491 A CN 202011515491A CN 112697442 A CN112697442 A CN 112697442A
- Authority
- CN
- China
- Prior art keywords
- emission
- equipment
- test
- engine
- portable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 87
- 238000013028 emission testing Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 17
- BUCXEFZXWKUCCY-UHFFFAOYSA-N 4-methyl-3-(2-phenylethyl)-1,2,4-oxadiazol-5-one Chemical compound O1C(=O)N(C)C(CCC=2C=CC=CC=2)=N1 BUCXEFZXWKUCCY-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000002229 photoelectron microspectroscopy Methods 0.000 title claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000003745 diagnosis Methods 0.000 claims abstract description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 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
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
- G01M15/048—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
Abstract
The method for comparing the testing accuracy of the PEMS equipment and the bench emission testing equipment comprises the steps of connecting a dynamometer with an engine, connecting a pitot tube of the portable emission testing equipment in series to the middle section of an exhaust pipeline connected with an exhaust port of the engine, extending the front end of a first sampling tube of the portable emission testing equipment into the pitot tube for sampling, and extending the front end of a second sampling tube of the bench emission testing equipment into the rear section of the exhaust pipeline behind the pitot tube for sampling; connecting an engine OBD diagnosis interface with portable emission testing equipment through a communication cable, and reading data of the engine; the temperature and humidity sensor of the portable emission testing equipment is arranged near a weather station; after the test is ready, a comparison test is started, the data recorded by the portable emission test equipment is transmitted to the emission analysis computer, the data recorded by the rack emission test equipment is transmitted to the control computer, and comparison analysis is carried out. The method has the advantages of low investment cost, simple test and accurate measurement result.
Description
Technical Field
The invention relates to the technical field of emission tests of engines and whole vehicles, and can improve the test precision and reliability of a road test of portable emission test equipment.
Background
Portable emission testing devices (also known as in-vehicle emission testing devices, PEMS) are in-vehicle devices that a vehicle performs actual road emission tests. Because of its small, convenient transport, can install this equipment inside the heavy-duty car carriage and carry out measurement and record to the exhaust emission of heavy-duty vehicle, pollutant (CO, CO2, NOX, PN, THC) emission concentration, exhaust temperature, vehicle speed, geographical position, external environment humiture in the driving process to can switch on vehicle OBD diagnostic interface and gather and record vehicle engine speed, coolant temperature, vehicle table shows speed, engine fuel consumption rate etc..
Because the portable emission testing equipment is tested outdoors all the year round, the change difference of the external environment is large, and the influence of vehicle jolt can influence the accuracy and reliability of the precision equipment, so the measurement uncertainty of the portable emission testing equipment needs to be compared with the emission testing equipment with higher accuracy for testing. At present, the common technical method is to compare portable emission testing equipment with rotary drum emission testing equipment, but the heavy rotary drums equipped with the emission testing equipment in China have high cost and small quantity, so that the comparison of the conventional portable emission testing equipment and the conventional heavy rotary drum emission testing equipment is difficult, even the comparison is not carried out in the whole life cycle of a plurality of portable emission testing equipment, and finally the accuracy of the test result is reduced. In addition, compared with heavy drum emission testing equipment, a driver needs to drive the automobile manually, the speed and the engine speed are difficult to control accurately, and the comparison can also cause certain influence on the result.
The domestic quantity of the counter-observation engine bench emission test equipment is large, and the accurate control can be carried out on the environment and the engine working condition between the tests, so if the portable emission test equipment and the engine bench emission test equipment can be adopted for comparison, a more accurate test result can be expected to be obtained.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method for comparing the test precision of portable emission test equipment and engine pedestal emission test equipment, which has the advantages of low investment cost, simple test and accurate measurement result.
The technical scheme adopted by the invention is as follows:
the testing precision comparison method of the PEMS equipment and the bench emission testing equipment comprises the following steps:
a. constructing a test system:
the input end of a dynamometer (1) is connected with the output end of an engine (2), a pitot tube (7) of a portable emission testing device (5) is connected in series to the middle section of an exhaust pipeline (6) connected with an exhaust port (4) of the engine, the front end of a first sampling tube (10) of the portable emission testing device extends into the pitot tube (7) for sampling, and the front end of a second sampling tube (11) of an emission testing device (8) between benches extends into the rear section of the exhaust pipeline (6) behind the pitot tube for sampling; connecting an engine OBD diagnosis interface (9) with portable emission testing equipment (5) through a communication cable, and reading data of the engine, wherein the data comprises fuel consumption rate, coolant temperature, reference torque and friction work;
positioning a temperature and humidity sensor (12) of a portable emission testing device (5) near a weather station of an engine test room;
arranging an emission analysis computer (13) in communication with the portable emission testing device (5) outside the engine test room, and arranging a control computer (14) in communication with the bench-to-bench emission testing device (8) inside a control room outside the engine test room;
b. test preparation was performed: after the equipment is installed and preheated, the portable emission testing equipment (5) and the bench emission testing equipment (8) are subjected to drift calibration respectively, so that the accuracy of a test result is ensured;
c. the alignment test was started: selecting a determined test cycle to test, starting the engine (2) and the dynamometer (1), simultaneously acquiring and recording engine data by the portable emission test equipment (5) and the bench emission test equipment (8), transmitting the data recorded by the portable emission test equipment to an emission analysis computer (13), and transmitting the data recorded by the bench emission test equipment to a control computer (14);
d. and comparing and analyzing the engine data acquired by the emission analysis computer (13) and the control computer (14).
Further, the test cycle in the step c is any one working condition test cycle of ETC, ESC, WHTC, WHSC, NRSC and NRTC.
The invention has at least the following advantages:
1. the accuracy of the measurement result can be improved by comparing the portable emission test equipment with the bench emission test equipment;
2. compared with a heavy vehicle test on a rotary drum, the running state of the engine can be more accurately controlled through the bench dynamometer (1) and the auxiliary equipment thereof, and the comparison test can be conveniently and smoothly carried out;
3. the comparison can be completed in an engine test room, a heavy drum with higher cost is not required, the operation is convenient and fast, the time can be saved, and the test cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a process for carrying out the present invention.
Detailed Description
As shown in fig. 1, a method for comparing the test accuracy of a PEMS device (i.e., a portable emission test device) and a bench emission test device includes:
a. constructing a test system:
the input end of the dynamometer 1 is connected with the output end of the engine 2, a pitot tube 7 of the portable emission testing device 5 is connected in series to the middle section of an exhaust pipeline 6 connected with an exhaust port 4 of the engine, and the exhaust pipeline 6 is arranged in an engine test room. The front end of a first sampling pipe 10 of the portable emission testing equipment extends into the pitot tube 7 for sampling, and the front end of a second sampling pipe 11 of the inter-bench emission testing equipment 8 extends into the exhaust pipeline 6 for sampling at the rear section behind the pitot tube. The pitot tube can measure the exhaust flow, and all the interfaces are firmly installed to avoid exhaust leakage or fresh air mixing in exhaust;
connecting an engine OBD diagnosis interface 9 with the portable emission testing equipment 5 through a communication cable, reading data of the engine, wherein the data comprises fuel consumption rate, coolant temperature, reference torque, friction power and the like, and performing consistency comparison analysis on the read data and data obtained by bench testing after the test is finished;
the temperature and humidity sensor 12 of the portable emission testing equipment 5 is arranged near a weather station of an engine test room, so that comparison between the temperature and humidity sensors is convenient;
an emission analysis computer 13 communicating with the portable emission testing device 5 is arranged outside the engine test room, and a control computer 14 communicating with the bench emission testing device 8 is also arranged in the control room outside the engine test room, so that the safety of testers in the test process is ensured.
b. Test preparation was performed: after the equipment is installed and preheated, the portable emission testing equipment 5 and the bench emission testing equipment 8 are subjected to drift calibration respectively, so that the accuracy of a test result is ensured.
c. The alignment test was started: the dynamometer 1 is used for selecting a determined test cycle (the test cycle can be a preset test cycle (ETC, ESC, WHTC, WHSC, NRSC, NRTC and the like) in the engine and can also be a self-programmed test cycle) to test, the engine 2 and the dynamometer 1 are started, air enters from an air inlet 3 of the engine, is exhausted to an exhaust pipeline 6 from an air outlet 4, and is exhausted through a skin hosting pipe 7 and a rear-stage exhaust pipeline. The portable emission testing equipment 5 and the bench emission testing equipment 8 simultaneously acquire and record engine data, transmit the data recorded by the portable emission testing equipment to the emission analysis computer 13, transmit the data recorded by the bench emission testing equipment to the control computer 14, and after the test is finished, perform drift calibration on the portable emission testing equipment 5 and the bench emission testing equipment 8 again.
d. The engine data obtained by the emission analysis computer 13 and the control computer 14 are compared and analyzed.
The method can compare and analyze various data such as oil consumption, exhaust gas volume, circulation work, real-time concentration of the discharged pollutants, specific concentration of the discharged pollutants, temperature and humidity, temperature of cooling liquid and the like.
The method of the invention has simple and convenient test system construction, and can be realized by only assembling the conventional dynamometer 1, the engine 2, the portable emission test equipment 5, the inter-bench emission test equipment 8, the emission analysis computer 13 and the control computer 14 according to the figure 1. The test process is simple and visual, convenient and fast, time can be saved, and test cost is reduced. The method can solve the problem of rare comparison of heavy drum resources with emission equipment, can more accurately control the operating condition of the engine, is favorable for reducing the error influence of external interference factors on comparison, and improves the convenience and accuracy of comparison.
Claims (2)
- The method for comparing the testing accuracy of the PEMS equipment and the bench emission testing equipment is characterized by comprising the following steps of:a. constructing a test system:the input end of a dynamometer (1) is connected with the output end of an engine (2), a pitot tube (7) of a portable emission testing device (5) is connected in series to the middle section of an exhaust pipeline (6) connected with an exhaust port (4) of the engine, the front end of a first sampling tube (10) of the portable emission testing device extends into the pitot tube (7) for sampling, and the front end of a second sampling tube (11) of an emission testing device (8) between benches extends into the rear section of the exhaust pipeline (6) behind the pitot tube for sampling; connecting an engine OBD diagnosis interface (9) with portable emission testing equipment (5) through a communication cable, and reading data of the engine, wherein the data comprises fuel consumption rate, coolant temperature, reference torque and friction work;positioning a temperature and humidity sensor (12) of a portable emission testing device (5) near a weather station of an engine test room;arranging an emission analysis computer (13) in communication with the portable emission testing device (5) outside the engine test room, and arranging a control computer (14) in communication with the bench-to-bench emission testing device (8) inside a control room outside the engine test room;b. test preparation was performed: after the equipment is installed and preheated, the portable emission testing equipment (5) and the bench emission testing equipment (8) are subjected to drift calibration respectively, so that the accuracy of a test result is ensured;c. the alignment test was started: selecting a determined test cycle to test, starting the engine (2) and the dynamometer (1), simultaneously acquiring and recording engine data by the portable emission test equipment (5) and the bench emission test equipment (8), transmitting the data recorded by the portable emission test equipment to an emission analysis computer (13), and transmitting the data recorded by the bench emission test equipment to a control computer (14);d. and comparing and analyzing the engine data acquired by the emission analysis computer (13) and the control computer (14).
- 2. The method for comparing the testing accuracy of the PEMS equipment and the bench emission testing equipment as claimed in claim 1, wherein the testing cycle of the step c is any one of ETC, ESC, WHTC, WHSC, NRSC and NRTC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011515491.5A CN112697442A (en) | 2020-12-21 | 2020-12-21 | Testing precision comparison method for PEMS equipment and bench emission testing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011515491.5A CN112697442A (en) | 2020-12-21 | 2020-12-21 | Testing precision comparison method for PEMS equipment and bench emission testing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112697442A true CN112697442A (en) | 2021-04-23 |
Family
ID=75507642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011515491.5A Pending CN112697442A (en) | 2020-12-21 | 2020-12-21 | Testing precision comparison method for PEMS equipment and bench emission testing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112697442A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432880A (en) * | 2021-05-26 | 2021-09-24 | 中汽研汽车检验中心（天津）有限公司 | System and method for testing heavy vehicle emission oil consumption based on engine bench |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130068002A1 (en) * | 2011-09-21 | 2013-03-21 | GM Global Technology Operations LLC | Method and system for simulating various engine operating conditions to evaluate engine emissions test equipment |
| CN105181343A (en) * | 2015-05-25 | 2015-12-23 | 中国环境科学研究院 | Simple on-board emission test system and simple on-board emission test method applicable to heavy truck equipped with OBD |
| CN107870222A (en) * | 2017-09-30 | 2018-04-03 | 中国汽车技术研究中心 | One kind is used for motor vehicle PEMS equipment uniformity comparison methods and its system |
| CN109489978A (en) * | 2018-10-30 | 2019-03-19 | 中国汽车技术研究中心有限公司 | A kind of multi-source data association analysis method of a variety of discharge detection methods of diesel locomotive based on V-a operating condition |
| CN111122171A (en) * | 2018-10-30 | 2020-05-08 | 中国汽车技术研究中心有限公司 | Multi-source heterogeneous data correlation analysis method for diesel vehicle and diesel engine multiple emission detection method based on VSP working condition |
-
2020
- 2020-12-21 CN CN202011515491.5A patent/CN112697442A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130068002A1 (en) * | 2011-09-21 | 2013-03-21 | GM Global Technology Operations LLC | Method and system for simulating various engine operating conditions to evaluate engine emissions test equipment |
| CN105181343A (en) * | 2015-05-25 | 2015-12-23 | 中国环境科学研究院 | Simple on-board emission test system and simple on-board emission test method applicable to heavy truck equipped with OBD |
| CN107870222A (en) * | 2017-09-30 | 2018-04-03 | 中国汽车技术研究中心 | One kind is used for motor vehicle PEMS equipment uniformity comparison methods and its system |
| CN109489978A (en) * | 2018-10-30 | 2019-03-19 | 中国汽车技术研究中心有限公司 | A kind of multi-source data association analysis method of a variety of discharge detection methods of diesel locomotive based on V-a operating condition |
| CN111122171A (en) * | 2018-10-30 | 2020-05-08 | 中国汽车技术研究中心有限公司 | Multi-source heterogeneous data correlation analysis method for diesel vehicle and diesel engine multiple emission detection method based on VSP working condition |
Non-Patent Citations (2)
| Title |
|---|
| 冯谦等: "柴油车实际道路PEMS排放测试与发动机台架测试的对比关联分析", 《2019中国汽车工程学会年会论文集（4）》 * |
| 艾毅等: "基于同型号欧Ⅵ发动机的整车与台架排放测试差异性研究", 《小型内燃机与车辆技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432880A (en) * | 2021-05-26 | 2021-09-24 | 中汽研汽车检验中心（天津）有限公司 | System and method for testing heavy vehicle emission oil consumption based on engine bench |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108181432B (en) | Method for testing full-component emission of motor vehicle exhaust pollutants | |
| US6959590B2 (en) | Emission sampling apparatus and method | |
| CN201413238Y (en) | Automobile emission detecting system with simple transient working condition | |
| CN101000278A (en) | Method and device for measuring pollutant discharging total of motor vehicle | |
| CN112398804B (en) | Remote emission management vehicle-mounted terminal data consistency verification platform and verification method | |
| JPH03115963A (en) | Method and apparatus for measuring exhaust gas | |
| CN104849068A (en) | Heavy-duty vehicle rapid portable emission measurement system and method | |
| CN202453201U (en) | Vehicle emission detecting system by steady-state condition method | |
| CN101196435A (en) | Vehicle fuel oil consumption testing device through exhaustion dilution measurement | |
| CN112964476A (en) | On-line prediction method for actual road particulate matter emission of heavy-duty diesel vehicle | |
| CN106352934B (en) | The fuel economy test macro and method of plug-in hybrid electric vehicle | |
| CN112697442A (en) | Testing precision comparison method for PEMS equipment and bench emission testing equipment | |
| CN103207089B (en) | A kind of vehicle test information comprehensive acquisition system | |
| CN102818599A (en) | Automobile fuel consumption fast detection system based on carbon balance principle | |
| CN202661459U (en) | Standard gasoline vehicle instantaneous condition discharge detection device capable of simulating discharge of tail gas | |
| CN201000394Y (en) | Device for measuring gross amount of pollutant discharging of motor vehicle | |
| CN113029571B (en) | System and method for testing pollutant emission of hydraulic excavator | |
| CN101539559B (en) | Portable automobile exhaust analyzer based on state IV standards and analytical method thereof | |
| CN117074046B (en) | Automobile laboratory emission test method and device in plateau environment | |
| RU2724072C1 (en) | Imitation quality control system of vehicles engine oil | |
| CN104500193A (en) | Automotive exhaust emission data acquisition and analysis system and processing method thereof | |
| CN108572077A (en) | A kind of automobile engine detecting system | |
| CN210321857U (en) | Simple oil consumption testing device for passenger car | |
| CN116130016A (en) | Intelligent calibration method for SCR catalyst performance | |
| CN206146647U (en) | Automobile exhaust flow measurement control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210423 |