Mechanical Engineering Department, Aristotle University of Thessaloniki, P.O. Box 458, GR 54124, Thessaloniki, Greece.
Mechanical Engineering Department, Aristotle University of Thessaloniki, P.O. Box 458, GR 54124, Thessaloniki, Greece.
Sci Total Environ. 2018 Mar 15;618:1400-1407. doi: 10.1016/j.scitotenv.2017.09.274. Epub 2017 Oct 31.
The objective of this study was to test the potential for NO emissions improvements on a typical Euro 6 diesel vehicle, following modifications to its emissions control system, under Real Drive Emissions (RDE) testing conditions. A commercially available car was selected and was first measured in its original configuration according to RDE on the road and an initial conformity factor (CF) of 5.4 was determined. Subsequent engine calibration and installation of a Selective Catalytic Reduction (SCR) device were conducted and tested on a fully transient engine dyno setup, which precisely reproduced the engine operation under the on-road RDE test. The NO reduction achieved with those upgrades was 90%, leading to a CF of 0.53, with no CO or fuel consumption penalty. These findings demonstrate that diesel vehicles can reach low NO levels under real world driving conditions, when well-designed modern exhaust aftertreatment components are installed and properly calibrated.
本研究旨在测试对其排放控制系统进行改装后，一辆典型的欧 6 柴油车在实际驾驶排放（RDE）测试条件下，NO 排放改进的潜力。选择了一辆市售汽车，首先根据道路上的 RDE 对其原始配置进行测量，并确定初始一致性系数（CF）为 5.4。随后进行发动机校准，并在完全瞬态发动机测功机设置上安装选择性催化还原（SCR）装置，该设置精确复制了道路 RDE 测试下的发动机运行情况。这些升级带来的 NO 减排效果达到 90%，一致性系数（CF）降至 0.53，且 CO 和油耗没有受到影响。这些发现表明，当安装和正确校准设计精良的现代排气后处理组件时，柴油车可以在实际驾驶条件下达到低 NO 水平。
