Abstract
Recently, compact and high output power sources are needed in small electronic devices with higher performance. Authors have focused on internal combustion engines which have a higher output energy and power. In addition, we have adopted the hydrogen fuel because the power sources with environment-friendly properties are required in the small electronic devices. In this study, the rotary engine (RE) was adopted as the compact power source because it has simple structure and a small number of parts. We developed hydrogen RE (HRE) with displacement of 20cc to investigate the problems in applying hydrogen to compact RE. This engine have been operated with internal mixing method and premixing method with a propeller. And, both rotary engine characteristics were evaluated with an eddy current dynamometer. As a result, in these two fuel supply methods, HRE could be operated for more than 30 minutes with the propeller. In the internal mixing method, HRE had the maximum output power of 1.04 kW, and in the premixing method, maximum output power of 0.72 kW. The maximum output power in the premixing method were 30 % lower than that in the internal mixing method although the operation was stable in the premixing method.
