On-Road Tests Using Small Crankcase-Supercharged 4-Stroke Cycle Engines

In order to investigate the transient characteristics of crankcase-supercharged 4-stroke cycle engines, such engines were installed in both a motorcycle and a passenger car for on-road test.

It was found that, in the starting and the passing acceleration tests, the engine speeds of the crankcase-supercharged engines increased more rapidly than that of the naturally-aspirated engine. Additionally,in 0-200m acceleration tests, the crankcase-supercharged motorcycle's time was 4.7 sec (approximately 16%) faster than that of the naturally-aspirated motorcycle.