[Air-Hybrid]

Originally Posted by PowerPiston

At the end of the muffler, we fix a exhaust turbine with a electric generator.
The generator charge a battery. So we thus use the exhaust energy.
10-20% better efficiency?

Discussed >here<:

Originally Posted by Air-Hybrid

"TIGERS (Turbogenerator Integrated Gas Energy Recovery System) is a water cooled switched reluctance generator coupled to an exhaust driven turbine. It is capable of operating in exhaust temperatures > 900ºC, at speeds up to 80,000rpm, delivering a shaft power of 6kW"

Controlled Power Technologies... TIGERS