I’m a lot more skeptical of the on-demand motive power your micro-sized (by necessity) steam engine than I am of the actual E-cat. There is only so much room under the hood of a car, particularly a small one. The E-cat units, the electricity generator and battery will use a lot of it. Leaving not so much for a boiler and pistions, your “pressure accumulator”, hydraulics, etc. But whatever, it’s fun to speculate.
From reading all your comments, it seems clear that an E-cat powered car would definitely be a “green” type of car: Small and rather low-powered. Those needing more muscle in their auto/truck could stick with petroleum powered vehicles. The great thing about E-cat powered car is not having to stop for fuel or for battery charging. I am assuming that once the steam engine system is filled w/ water or other fluid that it is a closed system that won’t often need additional fluids.
But I don’t really know, I am a highway engineer not an ME.