Examination of a Free-piston Engine Linear Generator System with Opposite-side Combustion

A Free-Piston Engine Linear Generator System is expected to be applied to a hybrid car. Previous studies have presented a one-sided FPEG that uses a combustion chamber and an air spring chamber. However, loss of the air spring chamber has been observed. In this study, the system efficiency of an opposite-side FPEG with a combustion chamber on both sides of the mover instead of an air spring chamber is compared with that of the one-sided FPEG.