高热效率稀燃发动机的产品开发  

Development of Lean Burn Engine with High Thermal Efficiency

作　　者：崔亚彬[1] 赖海鹏[1] 贾楠[1] 柳茂斌 袁中营[1] Cui Yabin;Lai Haipeng;Jia Nan;Liu Maobin;Yuan Zhongying(Great Wall Motor Co.,Ltd.,Honeycomb Yichuang Technology Co.,Ltd.,Baoding 071000)

机构地区：[1]长城汽车股份有限公司,蜂巢易创科技有限公司,保定071000

出　　处：《汽车工程》2023年第3期430-437,共8页Automotive Engineering

摘　　要：混合动力汽车是降低整车CO_(2)排放和污染物排放的有效解决方案。提升混动发动机最高热效率,并扩大常用工况高热效率区可以有效降低整车燃油消耗。根据混动技术平台需求,开发了一款2.0T高效稀燃混动发动机。该发动机采用高压缩比,大程径比和深度米勒循环,使用高滚流气道设计实现了过量空气系数1.8的超稀薄燃烧。凭借先进的燃烧系统和降摩擦设计,该发动机实现了44%的有效热效率。同时,41%以上热效率区域覆盖了转速从1000到4000 r/min发动机混动常用工况点,确保了出色的整车燃油经济性。此外,高效稀燃发动机还实现了115 kW的最大功率和240 N•m的转矩平台,保证了混动系统的动力性需求。Hybrid vehicle is an effective solution to reduce vehicle CO_(2) emission and pollutant emission.Improving the maximum thermal efficiency of engine and expanding the high thermal efficiency area under common working conditions can effectively reduce the fuel consumption of the hybrid vehicle.According to the requirements of hybrid technology platform,a 2.0T high-efficiency lean burn hybrid engine is developed.The engine adopts an ultra-high compression ratio,large stroke/bore ratio and a deep Miller cycle,and uses a high tumble port design to achieve ultra lean combustion with an excess air ratio of 1.8.With advanced combustion system and friction reduction design,the engine has achieved an effective thermal efficiency of 44%.At the same time,more than 41% of the thermal efficiency area covers the main engine operation points of hybrid engine from 1000 to 4000 r/min,ensuring excellent fuel economy of the hybrid vehicle.In addition,the high-efficiency lean burn engine also realizes the maximum power of 115 kW and the torque platform of 240 N•m,which ensures the power requirement of the hybrid system.

关 键 词：稀燃发动机 高热效率 高压缩比 混合动力 

分 类 号：U464[机械工程—车辆工程]