การประเมินปัจจัยการระบายสารมลพิษทางอากาศจากรถจักรยานยนต์

Abstract

The aim of this research was to study the Emission Factor (EF) and Fuel Consumption (FC) of 2-stroke and 4- stroke motorcycles. The samples were 11 of 2-stroke and 26 of 4-stroke motorcycles. The exhaust sample was collected directly from the tailpipe using Constant Volume Sampling (CVS) while running on the Chassis Dynamometer. There were four different driving speeds used: 1) 20-30, 2) 30-40, 3) 40-60 km/h and 4) in all speed range (20-60 km/h). Fuel used in the study was gasoline 91, gasohol 91 and gasohol 95. The study revealed that the 2-stroke motorcycle which using gasoline 91, gasohol 91 and gasohol 95 emitted Total Hydrocarbon (THC) 6.74, 11.13 and 5.25 times higher than the 4-stroke motorcycle did. The 2-stroke motorcycle also emitted CO greater than the 4-stroke motorcycle 1.46, 1.57 and 1.39 times, respectively. The study on Fuel Consumption (in kilometer per liter unit) found that the 4-stroke motorcycle at all speed range got more distance than the 2-stroke motorcycles did for all types of fuel. The statistical t-test revealed that the amounts of THC and NO_x in both 2 and 4 stroke motorcycles were significantly different at the confidential level of 95%. While, there was not significantly different at the confidential level of 95% for CO₂.