某插电混动车型的排放和后处理开发应用

Research of Emission and Aftertreatment on Plug-in Hybrid Vehicle

文章针对插电混动(PHEV)汽油车型电池提供部分动力和发动机启停频繁的运行特点,发动机运行工况点灵活且相对集中,同时发动机的频繁启动时的污染物排放高。基于此,对PHEV车型的排放后处理进行匹配开发,以台架性能结果展开评估,包括起燃温度、储氧性能和背压特性,针对台架性能优异的后处理新技术开展整车排放(WLTC+RDE)试验,同时对比混动和传统车发动机运行特点,并对混动车的后处理选型开发特点进行小结。文章筛选出低成本高性能的排放后处理技术方案,实现降本增效的同时为应对愈加严格的排放法规储备技术。

This article focuses on the characteristics of plug-in hybrid electric vehicles(PHEV)which the battery provides partial power and the engine starts and stops frequently.The engine operating points are fl exible and relatively concentrated,while the frequent engine starts result in high pollutant emissions.Based on this,we studied the development of the emission aftertreatment for plug-in hybrid electric vehicle.We carried out engine bench performance testing,including light-offtemperature,oxygen storage performance,and back pressure.For the new aftertreatment technology with excellent bench performance,the vehicle emission(WLTC+RDE)test is arranged,At the same time,compare the operating characteristics of hybrid and traditional vehicle engines,and summarize the characteristics of post-treatment selection and development for hybrid vehicles.The emission aftertreatment technology which is low-cost and high-performance is selected to achieve the regulatory requirements in this article.We reserved the future technology to respond with increasingly strict emission regulations for the company while reducing costs and increasing efficiency.