关键词: 工程机械；功基窗口法；有效事件；无效事件；PEMS

Abstract: The emission of pollutants from non road diesel mobile machinery is closely related to atmospheric environmental quality. With the development of society, the number of non road mobile machinery is constantly increasing. Therefore, the importance of emission supervision and testing for such machinery is self-evident. After conducting experiments on non road four stage construction machinery using the portable emission measurement system (PEMS), the article compares the changes in emission levels of the machinery before and after removing invalid events using the power basis window method. It is found that the emission level of the machinery decreased by 11.2% after removing invalid events. The impact of data processing methods on emission results is analyzed, which provides a reference for future emission supervision and testing of non road mobile machinery.

Key words: Construction machinery; Power based window method; Effective events; Invalid event; PEMS