Abstract
In order to discuss the problems of continuous operation with small diesel engine for farm using rape-seed oil as fuel, the engine was operated for 50 hours at 2000rpm under the 3/4 load of its rated horse power. The results obtained were as follows.
1. The performances under continuous operation were showed the similar tendency to the results of operation at rated horse power following the JIS method.
2. After 50 hours continuous operation, the characteristics of lubricating oil such as specific gravity, kinematic (s) viscosity, surface tension, carbon residue and neutralization number were almost equal to those of using light oil.
3. A small amount of carbon deposit was observed in combustion chamber of the tested engine and its quantity was as small as that of using light oil.
4. The density of the black smoke of exhaust-gas was less than that of using light oil.
