European Commission - Joint Research Centre, via E. Fermi 2749, I-21027 Ispra, VA, Italy.
European Commission - Joint Research Centre, via E. Fermi 2749, I-21027 Ispra, VA, Italy.
Environ Res. 2018 Oct;166:298-309. doi: 10.1016/j.envres.2018.06.006. Epub 2018 Jun 15.
The Horizon 2020 prize for the "Engine Retrofit for Clean Air" aims at reducing the pollution in cities by spurring the development of retrofit technology for diesel engines. A Euro 5 passenger car was retrofitted with an under-floor SCR (Selective Catalytic Reduction) for NO catalyst in combination with a solid ammonia based dosing system as the NO reductant. The vehicle was tested both on the road and on the chassis dynamometer under various test cycles and ambient temperatures. The NO emissions were reduced by 350-1100 mg/km (60-85%) in the laboratory depending on the test cycle and engine conditions (cold or hot start), except at type approval conditions. The reduction for cold start urban cycles was < 75 mg/km (< 15%). The on road and laboratory tests were inline. In some high speed conditions significant increase of ammonia (NH) and nitrous oxide (NO) were measured. No effect was seen on other pollutants (hydrocarbons, carbon monoxide and particles). The results of the present study show that retrofitting high emitting vehicles can significantly reduce vehicle NO emissions and ultimately pollution in cities.
“清洁空气引擎改造”地平线 2020 奖旨在通过推动柴油发动机改造技术的发展来减少城市污染。一辆 Euro 5 乘用车在车底安装了选择性催化还原（SCR）NO 催化剂，并结合固体氨基计量系统作为 NO 还原剂。车辆在各种测试循环和环境温度下在道路和底盘测功机上进行了测试。根据测试循环和发动机条件（冷启动或热启动），NO 排放量在实验室中减少了 350-1100mg/km（60-85%），但在型式认证条件下除外。对于冷启动城市循环，减少量小于 75mg/km（小于 15%）。道路和实验室测试结果一致。在一些高速条件下，测量到氨（NH）和一氧化二氮（NO）的显著增加。对其他污染物（碳氢化合物、一氧化碳和颗粒物）没有影响。本研究的结果表明，改造高排放车辆可以显著降低车辆的 NO 排放，最终减少城市污染。
