The simple solution is to strap a generator to a piston engine, as BMW did with the two-cylinder range extender in its i3 EV. But if the engine never turns a wheel, there's no need for it to ...

A new design for a piston-free linear engine generator has just been released by Toyota. With remarkable efficiency, the device might be scaled up to compete with electric power plants used in ...

Toyota Working Hard to Make Free Piston Engine Linear Generator Possible. Published: 2 May 2014, 14:26 UTC • By: ... the free piston engine is basically a combustion engine with no crankshaft.