Research on Constant Load of Double Acting Free Piston Expander-Linear Generator

As a new type of vehicle waste heat recovery device, free piston expander-linear generator (FPE-LG) can recycle vehicle exhaust to generate electricity, thereby reducing energy consumption and pollutant emissions. In order to develop a more integrated FPE-LG system and advance the practical application of FPE-LG. In this paper, a double-acting free piston expander linear generator test bench is built, the operating characteristics of the piston and the output performance of the linear generator are studied when the system is connected to a constant load resistance. At the same time, the pressure and temperature changes of the air in the cylinders on both sides were analyzed.