Hermetic Generator Set

We comfirmed that the rotating rod seal at the output shaft has large mechanical loss. The seal can be omitted, if the electric generator is put in the pressurized crankcase, because the shaft does not penetrate the crankcase in that case. It is considered that the mechanical loss decreases remarkably, and the shaft power increases fairly with the hermetic generator set.

The figure to the right shows the developed hermetic generator set. The electric generator shown in the figure has big size, because it needed enough capacity for the experiments at wide-range speed condition. It can realize a more compact size generator set, if the engine works only at rated operation in practical use.