Measuring Particulate Emissions of Light Duty Passenger Vehicles Using Integrated Particle Size Distribution (IPSD)

• DOI: 10.1021/acs.est.5b00666
• Publication Date: 2015-04-16T21:25:25Z
• Authors: David C. Quiros; Sherry Zhang; Satya Sardar; Michael A. Kamboures; David Eiges; Mang Zhang; Heejung S. Jung; Michael J. Mccarthy; M.-C. Oliver Chang; Alberto Ayala; Yifang Zhu; Tao Huai; Shaohua Hu
• Keywords: Particle (ecology); Ultrafine particle

The California Air Resources Board (ARB) adopted the low emission vehicle (LEV) III particulate matter (PM) standards in January 2012, which require, among other limits, vehicles to meet 1 mg/mi over federal test procedure (FTP). One possible alternative measurement approach evaluated support implementation of LEV is integrated particle size distribution (IPSD), reports real-time PM mass using and effective density. IPSD method was TSI's engine exhaust sizer (EEPS, 5.6-560 nm) gravimetric filter data from more than 250 tests 34 at ARB's Haagen-Smit Laboratory (HSL). persistently lower by 56-75% FTP 81-84% supplemental (US06) tests. Strong covariance between methods suggests test-to-test variability originates actual differences rather accuracy, where offered no statistical improvement variability.