摘要
在一台进气辅助加热的缸内直喷HCCI汽油机上,根据HCCI小负荷边界工况、燃烧不稳定、燃烧相位循环波动大的特点,制定了基于离子电流信号的燃烧相位闭环控制策略并进行了试验研究.结果表明,离子电流差分最小值相位在稳态工况具有较好的相位稳定性,瞬态工况时与HCCI燃烧相位的相关性最好;通过对首次喷油量的调整,利用离子电流差分最小值相位与HCCI燃烧最大放热率相位之间的相关性制定的控制策略,可以达到控制HCCI燃烧稳定的目的.
In view of the unstable combustion and phase fluctuation under light loads of HCCI mode, the strategy of HCCI combustion phase closed loop control based on ion current is designed and experimented in a GDI/HCCI engine assisted by intake-air heating. The experimental results show that the phase of the minimum differential ion signal stabilizes in steady operation state. In transient operations, the phase of the minimum differential ion signal displays great consistency with combustion phases. The control strategy established by the relativity between the phase of the minimum differential ion signal and the maximum heat release rate can enable stable HCCI combustion by means of 1st stage fuel injection adjustment.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2013年第2期135-140,共6页
Journal of Combustion Science and Technology
基金
国家重点基础研究发展计划(973计划)资助项目(2007CB210005)
上海市重点学科建设资助项目(B303)
高等学校创新引智"111"计划资助项目(B08019)
关键词
离子电流
均质充量压燃
燃烧相位
闭环控制
ion current
homogeneous charge compression ignition （HCCI）
combustion phase
closed loop control
