Lou's Idea is not new. back in the early 1900s there were some engines either for marine or stationary use that had a solid ball sticking uo on top of the cylinder and most likely a rod on the inside of the head it was heated up with an old fashion pump up gasoline blow torch and the heat of the unit ignited the fuel mixture this was not an injected diesel. I guess the heat of combustion kept it hot. I do not have any idea of the fuel may have been benzene, kero??
It worked and no battery required

martin