Influence of flow on PCCI combustion in a Heavy-Duty engine

Introduction Premixed Charged Compression Ignition (PCCI) uses stratified regions to decrease the rate of heat release (RoHR). A very aggressive RoHR is a serious issue when applying Homogeneous Charged Compression Ignition (HCCI) at higher loads. In this project the influence of charge stratification on PCCI combustion is investigated by measuring in-cylinder velocities with and without spray injection. Stratifying charge both in temperature and in concentration will be done in the future using multiple injections.