Alcohol fuel

About: Alcohol fuel is a research topic. Over the lifetime, 2030 publications have been published within this topic receiving 42757 citations.

Experimental study of hydrous ethanol gasoline blend (E10) in a four stroke port fuel‐injected spark ignition engine

Abstract: SUMMARY Performance, emissions and combustion characteristics of a port-injected engine fuelled with hydrous ethanol gasoline blend (E10 - 10% of hydrous ethanol by volume in gasoline) were compared with gasoline operation. Hydrous ethanol blend produced higher power output with lean mixtures at part throttle condition. Higher flame velocity and wider flammability limits of the blend resulted in lower cycle-by-cycle variations in indicated mean effective pressure as compared to gasoline. Hydro carbon emission was also lower due to the oxygen available in the fuel (E10), which enhanced the combustion rate. Higher latent heat of evaporation of the ethanol blend and water present in it resulted in lower in-cylinder temperature, which in turn led to lesser NOx emissions. Thermal efficiency with the blend was higher in the leaner operating conditions than gasoline. Not much difference in performance, emission and combustion characteristics between neat gasoline and E10 were observed at full throttle operation. On the whole, hydrous ethanol blends can be used as a fuel with good performance and low emissions at part load condition. Copyright © 2012 John Wiley & Sons, Ltd.

Fuel blend sensing system

Abstract: While the materials compatibility challenges have largely been met in "flex-fuel" vehicles, the engine and aftertreatment operation has not been optimized as function of fuel type (i.e. ethanol, biodiesel, etc.). The full-scale introduction of alternative fuels is most likely going to occur as blends with conventional fuels. This is seen to some extend with the limited introduction of E85 (85% ethanol, 15% gasoline) and B20 (20% biodiesel, 80% conventional diesel.). This further exacerbates the challenge of accommodating variable fuel properties, as there will be differences in combustion properties due to both the type of alternative fuel (i.e. pure biodiesel vs. pure diesel) and blend ratio (i.e. B20 vs. B80). Real-time estimation of the fuel blend is key to the optimized use of two-component fuels (e.g. diesel-biodiesel, gasoline-ethanol, etc.). The approach outlined here uses knowledge of the exhaust composition, fuel and air delivery rates to the engine to estimate the fuel blend. The strategy is illustrated with a production wideband O2 in the engine's exhaust steam, coupled with knowledge of the air-fuel ratio, to estimate the percentage of biodiesel in fuel being delivered to a 2007 Cummins turbo-diesel engine.

Dual fuel engines fueled with three gaseous and biodiesel fuel combinations

Abstract: Alternative fuels have numerous advantages over fossil fuels as they are renewable, biodegradable, provide energy security and foreign exchange savings, and help in addressing environmental concern...

The Effect of Alcoholic Fuel Additives on Exergy Parameters and Emissions in a Two Stroke Gasoline Engine

Abstract: In the present work, exergy terms, irreversibilities, and the amounts of emissions in a two-stroke engine with alcoholic fuel additive have been investigated experimentally. The applied alcoholic additive is Ethanol which is combined with gasoline in different percentages of 5, 10, and 15 %. The experiments have been done for 2,500, 3,000, 3,500, and 4,500 (rpm). The results show that in most test cases where alcoholic fuel is used, the combustion internal irreversibility increases, which is due to the increase in temperature difference between burned combustion products and unburned mixture that occurs as a result of the rapid evaporation of the alcohol fuel additives. This is an important reason for second law efficiency reduction. But for the case of little additive percentage (5 %), it has a reverse effect which can be assumed as an advantage. The most outstanding result of using ethanol additive is that the production of pollutants such as HC, CO2, CO, and NO x has been significantly reduced in all test cases.