摘 要随着汽车行业的不断开展，汽车尾气排放污染日益严重，本文分析了汽车排放污染物的主要成分、危害、生成机理以及影响因素，现行汽车排放法规等，着重对在用国产汽车发动机怠速工况污染物的排放统计特征进行深化系统地讨论，根据汽车检测线检测得到的大量样本实测数据，展开参数估量和假设检验，确定其最优拟合分布和相应的分布参数，进而建立轻型普通货车发动机的怠速工况污染物的排放分布密度函数和分布函数统计模型。对在用汽车的排放情况进行深化分析和讨论，为控制车辆排放污染提供可靠的保证，对正确评价其对城市周围大气环境所造成的污染以及排放法规的修订必将起到重要的作用。关键词：汽车，发动机，怠速工况，排放物，统计规律AbstractWith the continuous development of automobile industry, car exhaust emission pollution is increasingly serious, this article analyzes the main components of the vehicle emission pollutants, harm, formation mechanism and influencing factors, the existing vehicle emission regulations, the pollutant emissions in a car engine idle speed conditions of statistical features in-depth study systematically, according to the sample of automobile test line detection to get a large number of measured data, parameter estimation and hypothesis test, determine the optimum fitting distribution and corresponding distribution parameters, then build a light-duty ordinary freight car engine idle speed condition emissions of pollutants distribution density function and distribution function of statistical model. To use the car emission situation in-depth analysis and research, to provide reliable guarantee to control vehicle emission pollution, to correctly evaluate its around the city atmospheric environment caused by pollution and emission regulations revision will play an important roleKeywords: Automobile, engine, idle speed condition, emissions, statistical law前 言...........................................................................
