Abstract
1) When the same plunger pump was used, the maximum power decreased with the increase of water in emulsified fuel, as shown in Fig. 1.
2) The specific fuel consumption of emulsified fuel decreased, when compared with values obtained with gas oil, as shown in Fig. 3.
3) With the increase of water in emulsified fuel, the ignition delay, the maximum pressure and the rate of maximum pressure rise became large, and the crank angle which produced the maximum pressure had a lag.
4) The indicated thermal efficiency of ernulsified fuel was better than the gas oil.
5) In the case of above W/F=0.5, a phenomenon of miss-fire occured at idling and the blue smoke was emitted. Its frequency was in proportion to water/fuel ratio (W/F).
6) As W/F was large, starting performance was bad. In the case of W/F=0.3 hand starting motion was about ten times.
7) There was no corrosion in this experiment, but further investigation seemed necessary for long runs of the engine.
8) If additives were not used to improve the cetane number of emulsified fuel, the authors would think that the limit of W/F ratio would be 0.3 for the corhbination of the phenomenon of miss-fire and starting performance.
