This sounds really interesting. An internal combustion generation engine wastes a lot of energy as heat, so if that waste heat can be used (other than to heat the passenger compartment), that would be very efficient.
The full article is available at: http://www.worldcarfans.com/9080218.017/honda-tests-advanced-hybrid-system.Hybrid engines work by combining ... normally a battery and an internal combustion engine. The battery is meant to recapture ... for instance the energy wasted during braking. Interestingly, Honda has found a new alternative source of energy in respect of this.
The Japanese automaker is currently involved in a research using a Rankine cycle co-generation unit, in which the system works by capturing the exhaust heat from the engine and converting it to electricity.
Honda managed to successfully defeat the uncertainties on this system, by fitting the said unit into a standard Honda Stream and testing it. The test unit generated three times more electricity than other common systems found in hybrid cars these days.