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  • Title: Development of real-world driving cycles and estimation of emission factors for in-use light-duty gasoline vehicles in urban areas.
    Author: Hwa MY, Yu TY.
    Journal: Environ Monit Assess; 2014 Jul; 186(7):3985-94. PubMed ID: 24526615.
    Abstract:
    This investigation adopts vehicle tracking manner to establish real-world driving patterns and estimates emission factors with dynamometers with 23 traffic-driving variables for 384 in-use light-duty passenger vehicles during non-rush hour. Adequate numbers of driving variables were decided with factor analysis and cluster analysis. The dynamometer tests were performed on FTP75 cycle and five local driving cycles derived from real-world speed profiles. Results presented that local driving cycles and FTP75 cycle were completely different in driving characteristic parameters of typical driving cycles and emission factors. The highest values of emission factor ratios of local driving cycle and FTP75 cycle for CO, NMHC, NO x , CH4, and CO2 were 1.38, 1.65, 1.58, 1.39, and 1.14, respectively.
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