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A case study on particulate emissions from a gasoline plug-in hybrid electric vehicle during engine warm-up, taking into account start–stop operation
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering ( IF 1.7 ) Pub Date : 2020-07-04 , DOI: 10.1177/0954407020931227
Martin Lenz 1, 2 , Moritz Cremer 1 , Daniel Guse 1, 2 , Henning Röhrich 3 , Stefan Pischinger 1, 2
Affiliation  

Concerning the discussions about emissions caused by individual mobility, it is foreseeable that future vehicle concepts will increasingly be based on hybrid powertrains. These systems lead to more complex operating scenarios, which have a significant influence on the resulting emissions of the engine. This work shows a case study and the results in the operation and emission behavior of a plug-in hybrid electric vehicle with a direct injection gasoline engine when operated in an internationally recognized driving cycle. The vehicle’s exhaust aftertreatment system consists of a three-way catalytic converter; a particulate filter is not installed. The emissions are analyzed with a focus on particulate number emissions (from soot), especially during the warm-up phase and the frequent start–stop events (in total, there are 12 internal combustion engine operating phases), which are typical for hybrid vehicles. The results show that approximately 50% of the emitted particulates have a smaller size, 23 nm (a very high number of particulates with a mean size of 10 to 15 nm are present), which are currently not regulated, but are expected to have a high risk of adverse health effects.

中文翻译:

考虑启停操作的汽油插电式混合动力汽车发动机预热期间颗粒物排放的案例研究

关于由个人移动引起的排放的讨论,可以预见的是,未来的车辆概念将越来越多地基于混合动力系统。这些系统导致更复杂的操作场景,这对发动机产生的排放有重大影响。这项工作展示了一个案例研究以及带有直喷汽油发动机的插电式混合动力电动汽车在国际公认的驾驶循环中运行时的运行和排放行为的结果。车辆尾气后处理系统由三元催化转化器组成;未安装微粒过滤器。排放分析的重点是颗粒数排放(来自烟尘),特别是在预热阶段和频繁的启停事件(总共,有 12 个内燃机工作阶段),这是混合动力汽车的典型特征。结果表明,大约 50% 的排放颗粒具有较小的尺寸,即 23 nm(存在大量平均尺寸为 10 至 15 nm 的颗粒),这些颗粒目前未受到管制,但预计会有对健康造成不利影响的高风险。
更新日期:2020-07-04
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