摘要
为减轻环境与资源压力，我国开始提倡新能源汽车。混合动力汽车，尤其是插电式混合动力汽车由于能够更好地平衡成本、续驶里程和能耗的问题，成为了当下新能源汽车的研发热点。针对插电式混动汽车实际道路行驶过程中的气态污染物排放问题，本文采用便携式车载排放测试设备（PEMS，PortableEmission Measurement System）对一辆满足国五法规的插电式混动汽车进行实际道路行驶排放测试，分析了车辆在电量消耗模式与充电模式下的排放差异。结果表明：充电模式下的CO和HC排放较高，分析原因是发动机在给车辆提供动力的同时还要给蓄电池充电，导致发动机处于高负荷工作状态，喷油量增加，空燃比降低，燃料燃烧不充分，导致排放大幅度增加。
关键词： 插电式混合动力汽车；车载排放测试；电量消耗模式；充电模式；排放特性
Abstract
In order to reduce the pressure of environment and resources, China began to advocate new energy vehicles. Hybrid electric vehicles, especially plug-in hybrid electric vehicles, have become a hot research and development area of new energy vehicles because they can better balance the cost, driving range and energy consumption. In view of gaseous pollutant Emission of plug-in hybrid vehicles during actual road driving, this paper adopts PEMS (Portable Emission Measurement System) to test the actual road driving Emission of a plug-in hybrid vehicle that meets the national five regulations. The emission difference between electric consumption mode and charging mode is analyzed. The results show that CO and HC emissions are higher in charging mode. The analysis reason is that the engine needs to charge the battery at the same time as providing power to the vehicle, which leads to the high load of the engine, the increase of fuel injection, the decrease of air-fuel ratio, and the inadequate fuel combustion, leading to a significant increase in emissions.
Key words： Plug-in hybrid electric vehicle; Vehicle emission testing; Power consumption mode; Charging mode; Emission characteristics
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