【摘 要】
：
A total of 14 in-use diesel buses were selected to conduct emission measurement using a portable emissions measurement system ( PEMS ) in Beijing.Their instanta
【机 构】
：
National Laboratory of Auto Performance & Emission Test,Beijing Electric Vehicle Co Ltd,Chinese Rese
【基金项目】
：
Supported by State Key Laboratory of Engines;国家自然科学基金
论文部分内容阅读
A total of 14 in-use diesel buses were selected to conduct emission measurement using a portable emissions measurement system ( PEMS ) in Beijing.Their instantaneous gaseous emission rates,particular matter (PM) emission rates and driving parameters were obtained.The influences of speed,acceleration and vehicle specific power (VSP) on emissions were analyzed.Based on the relationships between these driving parameters and emissions,24 driving bins defined by speed,acceleration and VSP were constructed with cluster analysis to group emission rates for Euro Ⅲ and Ⅳbuses,respectively.Then the emissions reductions from Euro Ⅲ to Euro Ⅳ diesel buses were analyzed.Lastly,on-road hot-stabilized emission rate model for diesel buses in Beijing was developed.Through the comparison of the model simulation emission rates with the measured emission rates,the modeled emission results were in good agreement with the measured emission results.In most of the cases,the differences were less than 12 ％.
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