Faculty of Mechanical Engineering, TU Košice, Letná 9, 040 01 Košice, Slovak Republic.
Faculty of Mechanical Engineering, TU Košice, Letná 9, 040 01 Košice, Slovak Republic.
Sci Total Environ. 2018 May 15;624:1421-1428. doi: 10.1016/j.scitotenv.2017.12.266. Epub 2017 Dec 27.
In the past period occurred information about a fact that in some of the motorcars was installed a software, which enabled to hide the over-limit values of the nitrogen oxides during the emission testing process. This affair is called "dieselgate". It is a well-known fact that the actual emission limits are very hard and there is arising a serious problem for automobile factories to meet the demanding emission requirements. The emission standard Euro is an obligatory standard, which is valid within the European Union. On the present there is valid the newest standard Euro 6, which should help to eliminate most of the undesirable substances that are influencing quality of air. However, already in this year or during the next year 2018 there will be implemented a new, stricter emission standard Euro 7 in the EU. From this reason started to be used some of the alternative fuels in this branch. There was performed a study, which investigated emissions of the vehicle diesel engine during application of the experimental fuels. The experimental engine was equipped with the turbocharging and with the direct fuel injection. The different testing fuels were created using the ratios 0%, 50%, 80% and 100% between the biodiesel and the ULSDF (Ultra Low Sulphur Diesel Fuel), whereas the individually mixed fuels were marked B0:U100, B50:U50, B80:U20 and B100:U0. The first kind of the applied fuel is the pure ULSDF and the last fuel is the pure biodiesel. The experimental measurements were performed at the different engine loading levels and various engine speeds in order to investigate an influence of the mixed fuels on the engine operational characteristics.
在过去的一段时间里，有消息称，一些汽车的软件中安装了一种程序，该程序能够在排放测试过程中隐藏氮氧化物的超标值。这一事件被称为“柴油门”。众所周知，实际的排放限值非常严格，汽车工厂很难满足严格的排放要求，这是一个严重的问题。排放标准 Euro 是一项强制性标准，在欧盟范围内有效。目前，最新的标准 Euro 6 仍然有效，它应该有助于消除对空气质量有影响的大多数有害物质。然而，今年或明年 2018 年，欧盟将实施更严格的新排放标准 Euro 7。出于这个原因，该行业开始使用一些替代燃料。进行了一项研究，调查了在使用实验燃料时车辆柴油发动机的排放情况。实验发动机配备了涡轮增压和直接燃油喷射系统。不同的测试燃料是通过生物柴油和 ULSDF（超低硫柴油燃料）之间 0%、50%、80%和 100%的比例来创造的，而单独混合的燃料则标记为 B0:U100、B50:U50、B80:U20 和 B100:U0。第一种应用燃料是纯 ULSDF，最后一种燃料是纯生物柴油。为了研究混合燃料对发动机运行特性的影响，在不同的发动机负荷水平和不同的发动机转速下进行了实验测量。
