[peterrr]

The example given is only to demonstrate how you could make use of the exhaust heat to boil and make steam of water. In this 2CV they boil liquid LPG in this thing so they have gas at sufficient pressure. And I thought it would give you an idea of how something like that would look like. (mostly it is better to steal idea's than to come up with your own rubbish and this works so..... why not use as an example for a steam converter?)