Active combustion control based on ringing index for reducing homogenous charge compression ignition (HCCI) combustion noise

摘要

An engine control system comprises a ringing index (RI) determination module and an exhaust gas recirculation (EGR) control module. The RI determination module determines at least one RI based on at least one pressure in at least one cylinder. The EGR control module actuates an EGR valve based on the RI.