In order to control the heat-release rate at homogeneous charge compression ignition (HCCI) operation. the feasibility of spark-assisted compression ignition (SI-CI) combustion was demonstrated with lean mixture of primary reference fuel (PRF) and hydrogen. In this study. the criteria at octane number and hydrogen ratio were investigated using a rapid compression/expansion machine for... https://www.parisnaturalfoodes.shop/product-category/shea-butter-lotion-unscented/