Effects of Hot and Cold Start Modes and Post-Processing on Fine Particulate Matter Emissions from Real Drive of Light-Duty Vehicles
The fine particulate matter emissions of two China Ⅵ light-duty gasoline vehicles were investigated by using real drive emission tests,focused on analyzing the effects of the two modes of cold and hot start and the gasoline particulate filter(GPF)on fine particulate matter.The results show that PN10 is mainly generated in the cold start,and the emission peak is prone to occurring in the rapid acceleration and deceleration conditions,with the highest emission peak of 8.10×1011#/s.The distribution of the percentage of PN23 and PN10 in the speed bands of the vehicles with GPF is widely different,and the number of PN10 in the total trip is increased by 30.9%compared with that of PN23.The growth rate is about three times those of vehicles without GPF.Fine particulate matter emissions at low temperatures increases significantly compared to ambient temperatures,and the increase is significantly higher for vehicles with GPF than for vehicles without GPF.It is found that the control of fine particulate matter emissions during the cold start phase is a priority for future regulation.
fine particulate matterreal drive emissioncold starthot startgasoline particulate filter(GPF)
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