Has anyone heard of a gasoline engine that instead of using a water jacket for cooling, uses a spray of water to cool the cylinder? I was thinking along the lines of installing a bank of water spray injectors around the cylinder to remove the heat, which creates steam which can be further heated by the exhaust gas cylinder and catalytic converter, ultimately running a small steam engine. I would imagine that the outer surface of the engine cylinder might be finned aluminum as in air cooled engines. Anyways, I was just curious if a feasibility study has been made along these lines, or if anyone can think of a good reason why I shouldn't build a small research prototype. ps. I am familiar with the system BMW is working on, and with the Crower's 6-cycle engine.