Despite the recent advent of usable, talented electric vehicles, combustion engines are likely to persist for quite some time, often as a component in plug-in hybrid and range-extended electric vehicles. The onus then is on refining combustion power to work harmoniously with increasingly electrified vehicles — and Toyota’s new Free Piston Engine Linear Generator could be one solution. The idea of a linear engine is nothing new – engineers and research departments have been developing them for years.