Heat Release Analysis of Clean Combustion with Ethanol Ignited by Diesel in a High Compression Ratio Engine

Exploring the mid-load potential of ethanol-diesel dual-fuel combustion with and without EGR

“…This can be attributed to the shorter ignition delay, longer injection periods, and reduced amount of air/oxygen available, which limited the fuel vapour-air mixing process [28,34]. A similar trend was reported by Gao et al [35] when characterising the conventional diesel combustion heat release at different loads using a constant intake oxygen concentration and fixed injection timing. Adding 25% EGR generally allowed for advanced diesel injections due to longer burn durations and possibly lower local combustion temperatures.…”

Impacts of multiple pilot diesel injections on the premixed combustion of ethanol fuel

“…The overall trends for the emissions were as expected and agreed with those reported in previous publications. 23,28 With an increased engine load, the premixed in-cylinder charge was richer and tended to burn more completely. The high combustion temperature promoted the oxidation of CO and THC, and the formation of NO x .…”

“…Ethanol, as the most common alcohol fuel, has been extensively studied in compression ignition engines owing to its high resistance to autoignition and high volatility. 21,[27][28][29][30][31] Furthermore, ethanol can be produced from biomasses, and its use can potentially reduce greenhouse-gas emissions on a life-cycle basis. 30 The production and the distribution infrastructure for ethanol are relatively mature, which makes it a practical alternative as a partial substitute for conventional fossil fuels in compression ignition engines.…”

“…The pilot energy contribution was 54% at high engine loads. Gao et al 28 studied the combustion performance and the emissions of diesel-ethanol dual-fuel combustion. More than 25% of the total energy was contributed from the single diesel injection.…”