Effect of two-stage injection on combustion and emissions under high EGR rate on a diesel engine by fueling blends of diesel/gasoline, diesel/n-butanol, diesel/gasoline/n-butanol and pure diesel

Experimental investigation of particle emissions under different EGR ratios on a diesel engine fueled by blends of diesel/gasoline/n-butanol

“…In recent years, butanol has been extensively investigated and regarded as a promising prospective additive for diesel and gasoline [10][11][12][13][14][15]. Compared with methanol and ethanol, n-butanol is more easily soluble in diesel fuel and hydrophilic, which decreases the risks of corrosion of carbon steels.…”

“…Their results showed that an increase in the inlet oxygen concentration leads to a decrease in soot emissions, and revealed that the joint effect of the higher resistance to auto ignition and the higher volatility of n-butanol blends improves emissions compared to neat diesel with a small drawback on fuel consumption. Although many researchers [22][23][24][25][26][27]15,28,29] have investigated the engine performance and the exhaust emissions in diesel engines fueled with diesel-n-butanol blends, and some recent research work has already been conducted to investigate the influence of butanol-diesel blends on the particle emission characteristics [30][31][32][33], most of the research on emissions of diesel/gasoline/nbutanol blended fuel is focused on NO x , soot, CO and HC (unburned hydrocarbon) emissions. In our previous work [34], we mainly investigated the combustion characteristics (ignition delay, CA50 (the crank angle location for 50% cumulative heat release) and maximum pressure rise rate), the economic performance, the common emissions (NO x , soot, CO and HC), and simply characterized the particle concentration in the emissions of diesel/gasoline/nbutanol blends at different EGR ratios.…”

Injection strategy for simultaneous reduction of NOx and soot emissions using two-stage injection in DME fueled engine

“…Therefore, the authors have attempted to decrease the NO x emission without deterioration of soot emission and engine performance in a common-rail diesel engine without using an after-treatment device and EGR system. Zheng et al [25] have investigated that the effect of two-stage injection on combustion and emissions characteristics in a diesel engine. They revealed that the application of pilot injection close to main injection caused the reduction of the peak of premixed heat release rate and maximum pressure rise rate.…”

Design of synthetic EGR and simulation study of the effect of simplified formulations on the ignition delay of isooctane and n-heptane

“…New combustion modes are based on the autoignition of a reactive mixture, with a higher or a lower degree of homogeneity, in an environment with low oxygen content (much less than in the atmosphere). These modes show virtually zero emissions of soot and NO x , but high emissions of unburned hydrocarbons (UHC) and carbon monoxide (CO) [5]. However, both UHC and CO are easily eliminated thanks to currently available after-treatment systems, which are efficient, effective and inexpensive.…”