Studies on the direct control of the start of HCCI combustion with rapid compression expansion machine

Abstract

Since the onset of Homogeneous Charge Compression Ignition (HCCI) combustion depends on the chemical reaction, it is quite difficult to control the start of combustion directly. Pulsed Flame Jet (PFJ), which is the jet of burning gas issuing from a small cavity facing a combustion chamber, has a potential for controlling the start of HCCI combustion in low-load conditions. In the present study, the characteristics of HCCI combustion initiated by PFJ were investigated using Rapid Compression Expansion Machine (RCEM). The validity of PFJ utilization was shown through pressure and NOx measurements. Copyright © 2012 by the Japan Society of Mechanical Engineers.