Abstract

Rural vehicles (RVs) are widely used in China rural areas and are the major sources of NOx and black carbon pollution . In order to obtain the accurate emission factors and emission inventories for RVs, the real driving emissions of several tri-wheel rural vehicles (3-W RV) were measured using portable emission measurement system (PEMS), and an instantaneous emission model was built based on the tri-wheel rural vehicle emission data and used to predict the hot stabilized 3-W RV emissions. For the selected driving trip the estimated emissions agree well with the experimental results. The instantaneous emission model can be applied to estimate 3-W RV emission characteristics for any driving pattern or driving cycle specified by the model user, and therefore the 3-W RV emission factors can be evaluated without the need of real driving emission testing.

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