Steam cooling system for internal combustion engines

In an internal combustion engine, especially a two-stroke internal diesel engine, having a piston, a cover, fuel injection means in said cover and a cylinder space:

• a cooling device comprising an annular movable plate confining in part said cylinder space and located substantially opposite said piston, said annular movable plate surrounding said fuel injection means, a plurality of recesses substantially uniformly spaced in said movable plate around said fuel injection means, a plurality of pistons mounted in said cover and fitted into said recesses respectively, a bore in each of said pistons, a channel in said cover for distributing cooling water, the end of each of said bores remote from said cylinder space being connected to said channel, check valve means for closing the other end of each bore adjacent said space, said check valve means including a spring and a ball, an injection bore of reduced diameter connecting the recesses formed in said movable plate to the cylinder space, springs arranged between said movable plate and said cover and being pre-stressed such that displacement of the movable plate toward said cover will take place only when the gas pressure in said cylinder space surpasses the critical pressure of water vapor of approximately 225 atmospheres during combustion of the fuel in said cylinder space, said pistons pressing water from the recesses in the movable plate under high pressure surpassing 1000 atmospheres through said injection bores into the cylinder space, whereby the water while passing through said injection bores evaporates in an explosion-like manner.