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GM and U Mich receive patent on plug-in series hybrid/extended range electric vehicle powertrain using multiple free piston linear alternator engines

Green Car Congress

GM Global Technology Operations LLC and the Regents of the University of Michigan recently were awarded a US patent (NÂș 8,261,860) for a plug-in series hybrid or range-extended electric vehicle powertrain using multiple free piston linear alternator (FPLA) engines. Patent Drawing of an FPLA. Click to enlarge.