Abstract:

Experimental study was done on the power, economy and emissions characteristics of the diesel
engine fueled with different blend ratio of PODE2-4 blend fuel. Three kinds of blend fuel with different volume
ratio (5%, 10%, and 20%) were tested on a R180 diesel engine without modification, at the speed of 1 200,
1 600, 2 400 r/min and the power load of 20% to 100%. The results show that the diesel engine power and
torque are decreased with the brake speci?c fuel consumption and the brake thermal efficiency increasing when
PODE2-4 blending ratio in the blended fuel increasing. The brake speci?c fuel consumption is increased by
13.6%, with the brake thermal efficiency increasing an average of 1.8% while the diesel engine power and torque
decreasing by an average of 5.3%, when fuel blended 20% PODE2-4. HC and CO emissions are decreased with
exhaust temperature and NOx emissions increased, while extinction coefficient decreased significantly with the
increase of PODE2-4 blending ratio under different loads and speeds conditions. Therefore, PODE2-4 is suit for
using as diesel fuel additive component at low blending ratio.

Key words: diesel engine, engine performance, emissions, polyoxymethylene dimethyl ethers, blended fuel