Piston engine with sequential steam injection has thermal insulation lining on combustion chamber wall, piston base, and cylinder wall, and regulated steam injection volume and injection timing

摘要

Combustion chamber wall, piston base, and cylinder wall of the engine are coated with a thermally insulating material. A steam injection nozzle in the cylinder head is arranged, so that injected steam volume and injection timing can be regulated. The thermal insulation coating heats up after a few engine cycles, and this is followed by several cycles with steam injection, so that the insulation cools down again. The injected steam takes-up heat from the hot combustion chamber wall, to increase working pressure and efficiency of the steam power process.