摘要
动态跳跃点火(DSF)为一项全可变停缸技术,发动机的每一个气缸都可以动态地执行停缸操作。其控制逻辑对停缸作出适当搭配,在兼顾NVH的同时,赋予了发动机更广泛的停缸范围,停缸缸数增加,节油能力优于传统停缸技术。基于车辆实测解析评估,一款1.4T轿车改装DSF在中国工况CLTC_P下的节油效果近于怠速起停的收益,例如7%左右。DSF在不同工况下节油效果有差别,数据显示NEDC循环下节油率略优于CLTC_P循环。DSF可以与48 V技术、智能控制技术、米勒循环发动机及均质稀燃发动机技术相配合,达成综合节油,这些组合为汽车厂家满足第五阶段油耗目标值提供了技术选项。
The dynamic skip fire(DSF)is a fully-variable engine cylinder deactivation technology,which allows each cylinder of engine to conduct deactivation dynamically.The control logic of DSF can make an appropriate strategy of cylinder deactivation with the solution of NVH problem,which bring a wider range of cylinder deactivation and hence increase the number of deactivated cylinder.Accordingly,DSP can achieve better fuel economy than traditional cylinder deactivation.According to car real-time measurement and analysis,the fuel saving of CLTC_P cycle for 1.4T car retrofitted with DSP was around 7%,which was close to that of idle start-stop.DSF had a different fuel economy under different conditions and the data showed that the fuel saving effect of NEDC was superior to that of CLTC_P.In addition,DSP could be matched with 48 V hybrid technology,intelligent control,Miller cycle engine and homogeneous lean-burn engine so as to realize integrated fuel economy.The composite technology was good choice to meet the fifth stage fuel consumption target value for automobile manufacturer.
出处
《车用发动机》
北大核心
2019年第2期10-15,共6页
Vehicle Engine
关键词
汽车发动机
停缸
动态跳跃点火
燃油经济性
automobile engine
cylinder deactivation
dynamic skip fire
fuel economy
