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
NOVEMBER 25, 2012
The GM/U Mich patent envisages using multiple free-piston engines (240A through 240D in the patent drawing). The powertrain system—the patent application for which was filed in 2009—includes an electrical energy storage system—such as a Li-ion battery pack—and an electric traction motor. Click to enlarge.
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