DMEを燃料とする小型軽量HCCI機関の高温および低温EGRガスを用いた燃焼制御(熱工学,内燃機関,動力など)

概要

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One of the main challenges with HCCI engines is structuring thhe systems to control combustion phasing to conduct the stable HCCI operation. Though some HCCI combustion control systems have been suggested, these systems are heavy and have the complex mechanism. In this study, for the development of a small HCCI engine fuelled with DME, a simple HCCI combustion control system was structured, and the control system and the algorithm were evaluated experimentally. In the control system, the ratio of three gases (stoichiometric premixture, hot EGR gas and cold EGR gas) was controlled by throttles. The result showed that combustion phasing was able to be controlled by changing the ratio of hot EGR gas and cold EGR gas with throttles in order to adjust mass-averaged in-cylinder gas temperature at intake valve closure. And IMEP was feedback (PI) controlled by fuel flow rate, and combustion phasing and equivalence ratio were feedback (PI) controlled by throttles. As a result, it enabled them to track the desired values.
社団法人日本機械学会の論文
2007-09-25