1988 Volume 50 Issue 4 Pages 17-24
Two-cycle gasoline engines of small size have been used widely as the power source for agricultural machinery. If its power performance is improved in the region of high velocity revolution, it would become possible to make the engine size smaller and lighter. The improvement of its power performance means the increase of delivery ratio.
In this study, first of all, relations between the behavior of steel leaf valve and delivery ratio were investigated both experimentally as well as theoretically about the small size two-cycle engine.
As the result, some countermeasures for power-up of the engine in the region of high velocity revolution were found here.
Further more, it became clean that in the case that the plastics leaf valve is applied, nearly the same delivery ratio as the steel leaf valve could be obtained if the rigidity of the plastics leaf valve is not extremly lower.
