KEIO UNIVERSITY

1. KEIOUNIVERSITY Diesel Spray Combustion in a HCCI Using a RCM Ock Taeck Lim, Akihito Taiji, Hiroaki Nakano Background and Objective Rapid Compression Machine A Diesel combustion has serious problem ; PM, NOx etc Pre-mixture Intermediate HCCI H2O2, HCHO, CO, etc. HCCI-DI • duplicated a single diesel type compression cycle • No effect of flow, residual gas and cycle by cycle • Direct Photograph with Optical accessible head • Grateful effect of reducing PM, NOx using intermediate as like H2O2, HCHO CHEMKIN Result Conclusion DME/Air, tinj=285ms, P0=0.1MPa, T0=353K • There are H2O2, HCHO at DME Φ=0.01 and 0.02 HCCI combustion. • The ignition delay and flame existence • at DME Φ=0.02 is about 1.5ms delay and • about 0.75ms at DME Φ=0.01 • Using CHEMKIN, we can presumes how much is the intermediate of HCCI combustion process This year Project • Inject at inhomogeneous condition, Change of Injection timing • Change HCCI fuel ; Butane, n-Heptane, iso-Octane, DME 2005 IIDA LABORATORY