Studies on the Application of Emulsijied Fuels for Farm Diesel Engine [IV]

Effect upon abrasion

Abstract

It was found that the effect of the water ratio mixed in the emulsified fuel on the abrasion for a precombustion chamber type small diesel engine was remarkable.
When W/F=0.3 of emulsified fuel was used on the engine, the rate of piston ring abrasion and of Fe invoved in lubricating oil was least. Under the normal running condition using lubricating oil containing acid neutralizer characteristics and detergent dispersant characteristics and intermittent run, the abrasion when W/F=0.3 was about 40% less than the case of W/F=0.0, gas oil or standard fuel. On the other hand, the abrasion when using W/F=0.7 and 1.0 was 20-60% lager than the one when W/F=0.0.
The effect of additives in lubricating oil on the engine abrasion should be considered in the case of use emulsified fuel as well as gas oil. and the difference was 40-60%.
The further investigation of the effect of longer period of operation on abrasion should be needed.
Finally it can be concluded synthetically from the studies in Part 4 that W/F=0.3 is the most suitable water ratio for the practical performance of thermal efficiency, power, maximum pressuure, rete of maximum pressure rise, knocking, exhaust gas, startability, abrasion and so on.