Experimental Investigation on the Effects of PODEn Addition on Combustion Characteristics of a Diesel Engine

Abstract

Abstract Experimental tests were conducted to study the effects of PODEn (Polyoxymethy-lene dimethyl ethers) addition on the combustion characteristics and economy of a Yunnei Power 2102QB engine. The alternative fuel PODEn were blended with 0# diesel with mass fractions of 10%, 20%, 30%, and 50%, respectively. Results showed that as the PODEn concentration increased, the in-cylinder pressure curves of diesel/PODEn blends moved forward, the ignition delay time decreased, and the peak value of the in-cylinder pressure decreased gradually. The brake thermal efficiency of P10D90 and P20D80 were higher than that of D100, with a maximum increase of 2.1%. The brake specific fuel consumption raised and the brake thermal efficiency reduced when the PODEn blending ratio was at a high level (≥30%). Blending PODEn with low proportion can improve the combustion process and economy of 2102QB diesel engine.