In the future, the compact powerpack was needed because the existing rechargeable batteries cannot provide high energy density and required operational duration. As an alternative, the linear engine was satisfied with compact, durability and had light weight. In this study, prototype ceramic free-piston linear engine combined with a linear alternator was designed to produce electric power for portable usage. It has a bore size of 30 ㎜ and maximum stroke of 33 ㎜. The engine was fueled with liq ... 전체 초록 보기