Study on on-board measurements and modeling of vehicular emissions

• Published in: Huanjing kexue Vol. 25; no. 3; p. 19
• Main Authors: Hu, Jing-nan, Hao, Ji-ming, Fu, Li-xin, Wu, Ye, Wang, Zhi-shi, Tang, U-wa
• Format: Journal Article
• Language: Chinese
• Published: China 01-05-2004
• Subjects: Air Pollutants - analysis; Environmental Pollution - prevention & control; Macau; Models, Theoretical; Vehicle Emissions - analysis; Macau
• ISSN: 0250-3301

It's a basic work to study the characteristics of vehicular emissions and give emission factors for development of vehicular emission inventory and decision-making of the control strategies. On-board emission measurements of on-road vehicles are regarded as important complementary to emission laboratory dynamometer tests. On-board exhaust emission measurements were conducted on seven samples of gasoline cars in a typical road in Macao, using AVL DiGas 4000 light five-gas analyzer. It was found that there was an obvious reduction of gaseous pollutant emissions from cars equipped with electronic fuel injection and three-way catalytic converter system (referred to as EFI cars in the following), compared to old carburetor cars. The average volume concentrations of CO, HC and NO of carburetor cars were 227 x 10(-6), 1.57% and 1477 x 10(-6), respectively, while those of EFI cars were 33 x 10(-6), 0.21% and 131 x 10(-6), which were about 1/11 through 1/7 of the former. However, there were high emissions during the c