The engineers came up with some ingenious concepts ... The process works like this: a very lean fuel to air mixture is injected into the combustion chamber at the intake stroke.

Ultimately this design should even be able to accommodate diesel-like HCCI combustion. Lotus reveals flex-fuel engine concept to maximise fuel efficiency when running on renewable fuels or ...

but most of that work has revolved around hydrogen internal combustion rather than fuel cell electric vehicles. This new concept is a through-the-road hybrid that uses a both a small gasoline ...