Combustion Analysis of Diethyl Ether Blends in Gasoline Engine Operated with Ethanol

Abstract

Abstract-This paper investigates the effect of using unleaded gasoline with di ethyl ether blends on spark ignition engine (SI engine) performance, exhaust and combustion analysis. A four stroke, single cylinder SI engine was used for conducting this study. Exhaust emissions were analysed for carbon monoxide (CO), Hydrocarbon (HC), and Oxides of nitrogen (NOx) and carbon dioxide (CO 2 ) using unleaded gasoline, ethanol and di ethyl ether blends with different percentages of fuel at varying engine torque condition and constant engine speed. The result showed that the blending of unleaded gasoline with di ethyl ether increases the octane number and power output this may leads to increase the brake thermal efficiency. The CO, HC and NOx emissions concentrations in the engine exhaust decreases while the CO 2 concentration increases. Using di ethyl ether as a fuel additive to unleaded gasoline causes an improvement in performance and significant reduction in exhaust emission.

Effect of inlet air temperature on SI engine fueled with diethyl ether-gasoline blends

“…It is observed that 6% DEE blend shows decrease in HC emission at maximum load. It could be because of the addition of DEE reduced the ignition delay [12] and enhanced the combustion characteristics. Figure 3(b) shows the variations of HC emissions at inlet air temperature of 22°C with the load.…”

“…There is a decrease in energy content of the blended fuel and increase in fuel consumption depending on the amount and type of oxygenates added to the gasoline. This resulted in change of the air to fuel ratio and ensures complete combustion of fuel into CO2 and H2O [12,13]. Ethanol addition to unleaded gasoline increase the engine torque, power and fuel consumption and reduce CO, NOx and HC emissions.…”

Experimental Research With Diethyl Ether on Engine Performance and Emissions in a Spark Ignition Engine

“…So, this situation caused to obtain lower indicated thermal efficiency (ITE) on HCCI combustion. Balaji et al, [14] found BTE by about 15%, 14.5% and 14.8 % with 10% ethanol-2.5% DEE, 10% ethanol-5% DEE and 10% ethanol-7.5% DEE test fuels respectively for the 50% engine load in a SI engine. It was found that the increase of DEE additive decreased effective efficiency for 25, 50 and 75% engine loads in a direct injection diesel engine [7].…”

“…But, SFC increased with DEE10. Balaji et al, [14] concluded that fuel consumption increased with the increase of DEE addition at the same engine torque in a spark ignition engine. Kumar et al, [15] found that BSFC increased by 16% and 8.5% with 6% and 3% DEE fuel mixtures respectively at maximum engine load and 22°C inlet air temperature in a SI engine.…”

“…DEE can take a role as an ignition improver resulting in higher thermal efficiency [12,13]. Balaji et al [14] analyzed the combustion of DEE-ethanol-gasoline fuel mixtures. They have found that CO, HC and NOx decreased whereas CO2 increased.…”