Faculty of Mechanical Engineering and Aeronautics, Department of Combustion Engines and Transport, Rzeszow University of Technology, 8 Powstancow Warszawy Ave, 35-959, Rzeszow, Poland.
Environ Sci Pollut Res Int. 2018 Jun;25(18):17862-17877. doi: 10.1007/s11356-018-1983-5. Epub 2018 Apr 20.
Measurement of car engines exhaust pollutants emissions is very important because of their harmful effects on the environment. This article presents the assessment of repeatability of the passenger car engine exhaust pollutants emission research results obtained in the conditions of a chassis dynamometer. The research was conducted in a climate chamber, enabling the temperature conditions to be determined from - 20 to + 30 °C. The emission of CO, CH, CO, NO, THC, and NMHC was subjected to the analysis. The aim of the research is to draw attention to the accuracy of the pollutant emission research results in driving cycles, and the comparison of pollutant emission results and their repeatability obtained in successive NEDC cycles under cold and hot start conditions. The results of the analysis show that, in the case of a small number of measurements, the results repeatability analysis is necessary for a proper interpretation of the pollutant emission results on the basis of the mean value. According to the authors' judgment, it is beneficial to determine the coefficient of variation for a more complete assessment of exhaust emission result repeatability obtained from a small number of measurements. This parameter is rarely presented by the authors of papers on exhaust components emission research.
测量汽车发动机废气污染物的排放非常重要，因为它们会对环境造成有害影响。本文介绍了在底盘测功机条件下评估乘用车发动机废气污染物排放研究结果重复性的情况。研究是在气候室内进行的，能够确定从-20 到+30°C 的温度条件。对 CO、CH、CO、NO、THC 和 NMHC 的排放进行了分析。研究的目的是引起人们对驾驶循环中污染物排放研究结果的准确性的关注，以及在冷启动和热启动条件下连续进行 NEDC 循环时获得的污染物排放结果及其重复性的比较。分析结果表明，在测量次数较少的情况下，需要对结果的重复性进行分析，以便根据平均值正确解释污染物排放结果。根据作者的判断，对于从少量测量中获得的排气排放结果重复性的更全面评估，确定变异系数是有益的。这一参数在关于排气部件排放研究的论文中很少有作者提出。
