On-Road emission measurements of a gasoline vehicle by portable emission measurement system
Date Issued
2010
Date
2010
Author(s)
Tsai, Cheng-Yu
Abstract
In this study, a portable emission measurement system (PEMS) was used to acquire emission data from a gasoline vehicle by proceeding the on-road tests and dynamometer tests. A route ranging over Taipei county and Taipei city and consisting of comprehensive types of roads was designed for the real road tests. Regarding the dynamometer tests, FTP75and US06 driving cycles were used to evaluate the difference between PEMS and CVS-9000 system. According to the experimental results, the effects of operation conditions including road type, AC condition, driving cycle and measurement system on CO2, CO, HC, NOX emissions were determined. Vehicle specific power (VSP) was used as a variable to explain the emission trends of pollutants and evaluate the applicability of different definitions of VSP modes - North Carolina State University (NCSU) VSP Mode, Argonne National Laboratory VSP Mode and Taipei VSP Mode.
In terms of the experimental result, PEMS can be used to measure the emission rate of gasoline vehicle driving on different road types. By taking VSP Mode into consideration, the emission trends of CO2, CO and NOX coincide with our expectation (CO2, CO and NOX emissions exhibit expectable trends) except for the conditions of high VSP Mode. Among the different definitions of VSP modes, Taipei VSP Mode can explain emissions trends of CO2, HC, NOX with smaller confidence intervals and more coincidence with the expectation than NCSU VSP Mode and Argonne VSP Mode do. Consequently, Taipei VSP Mode defined on the basis of local driving conditions is more applicable to the experimental data in this study.
Subjects
portable emission measurement system
dynamometer
driving cycle
air conditioning
vehicle specific power
SDGs
Type
thesis
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