Studies on the Application of Emulsified Fuels for Farm Diesel Engine [III]

Abstract

The emulsified fuel will be one means to reduce some harmfulness to the human body and to plants in using farm diesel engines both indoors and out-of-doors. This paper discussed about the various engine performances under heavy loads and efficiencies associated with injection timing and cetane number improvers.
The experimental results may be summarize as follows.
1. Rated (Cruising) horsepower of diesel engine is decided by black smoke concentration, therefore rated (cruising) horsepower in the case of using emulsified fuel is larger than diesel fuel by attaching a plunger pump with larger inside diameter.
2. As injection timings were delayed, NOx emission as well as black smoke decreased with the decrease of the temperature of main combustion chamber. The reason for the decrease of NOx by using emulsified fuel was mainly due to the reduced time of high temperature in the combustion chamber.
3. When the W/F ratio in emulsified fuel was above 0.5 and partial load was above 7/8, CO concentration became larger than diesel fuel, and especially CO concentration in the case of W/F=1.0 became three to ten times as much as diesel fuel.