stockey,, the diesel engine they are developing for the hybrid car is really a driver for the alternator to charge the batteries, it could possibly run other fan belt related items like power steering if it is a full time application. However I believe that it will be tripped to turn on when the voltmeter reaches a certain stage of discharge, therefore giving the batteries extra mileage. Who knows for sure,development stage company in the truest sense of the word.
Holding my position here until the development news is announced.