Libertine FPE has built a demonstration prototype of its revolutionary linear electrical machine for what it is calling ‘Digital Piston Motion Control’ in free piston engine applications. This technology will allow researchers to develop future combustion engines free from the piston motion constraints dictated by the crankshaft. Already validated at proof-of-concept level, Libertine’s new hardware uses production-feasible component designs suitable for automotive hybrid powertrain modules, such as range extenders.