Influence of direct injection timing and mass of port injected gasoline on unregulated and nano-particle emissions from RCCI engine

摘要: Abstract The study aims to experimentally characterize the nano-particle emissions and un-regulated (i.e., saturated unsaturated hydrocarbons formaldehyde emissions) emissions. Present investigates effect of high reactivity fuel injection timings port-injected-fuel mass on unregulated in gasoline-diesel RCCI engine. Additionally, empirical correlations are developed using experimental data for estimation particle emission characteristics. An automotive single cylinder diesel engine is modified an in-cylinder blending port-injection gasoline during suction stroke direct-injection compression stroke. experiments performed a various port-injected development electronic control unit (ECU). Nano-particle measured electrical mobility based particle-sizer Fourier-transform infrared spectroscopy analyser respectively. Combustion analysis by pressure measurement. combustion characteristics used correlation multivariable regression technique determining number parameters - premixing ratio, start diesel, novel parameter defined as premixed fraction total heat release found good estimating Results also indicate that advanced direct timing increase leads higher well saturated, hydrocarbon