TY - JOUR
AU - Knop, Vincent
AB - Homogeneous charge compression ignition combustion mode theoretically relies on a perfectly homogeneous air/fuel mixture simultaneously releasing heat across the whole combustion chamber. However, practical implementation always leads to a staged combustion process that is still significantly quicker than conventional spark ignition or compression ignition combustion modes. The degree of combustion staging is central to the limitation of combustion-induced noise, to cycle efficiency, as well as to combustion stability and completion. The present study numerically explored on the whole operating map the mixture structure at ignition for a specific type of homogeneous charge compression ignition combustion, namely the controlled auto-ignition combustion mode attained through burnt gas trapping with negative valve overlap. The analysis of the complete controlled auto-ignition operating map outlined the similarity of mixture structure for any operating condition and the mixture/chemistry interactions depending on the end-of-compression temperature domain. Temperature stratification appeared as the key input defining combustion-induced noise and combustion stability but mean in-cylinder temperature and dilution combine with temperature stratification to define operating map limitations.
TI - Analysis of mixture structure and of its influence on combustion in a CAI engine
JF - International Journal of Engine Research
DO - 10.1177/1468087417712160
DA - 2018-04-01
UR - https://www.deepdyve.com/lp/sage/analysis-of-mixture-structure-and-of-its-influence-on-combustion-in-a-XmrjdU8Ytq
SP - 393
EP - 410
VL - 19
IS - 4
DP - DeepDyve
ER -