Hydraulic engine piston

Claim 1

A two piston hydraulic fluid separated internal combustion cylinder system having fuel admission means, comprising a first piston, a second piston, said second piston having a smaller diameter than said first piston, said first piston and said second piston being co-axially aligned, said first piston and said second piston being housed in a common cylinder, a first cavity located in said cylinder, said first piston being housed slidably in said first cavity, said fuel admission means coupled to said first cavity, a first side of said first piston being disposed opposite said fuel admission means, a second cavity, said second cavity being disposed in said cylinder, a second piston being disposed slidably mounted in said second cavity, the second side of said first piston being disposed facing said second cavity, a first side of said second piston being disposed facing said second side of said first piston, hydraulic oil, said hydraulic oil being disposed filling said second cavity, the second side of said second piston being disposed coupling a crank shaft, a plug, said plug being disposed in said first cavity, a viewing window, said viewing window being disposed in a wall of said window at a location in said second cavity, guiding means for guiding said first piston within said first cavity, a cylindrical block, said cylindrical block being disposed located in said cylinder and having an opening therein, said opening for guiding said second piston therein, said means to guide said first piston including a groove extending along a portion of the length of said wall of said cylinder in said first cavity, said first piston having a mating protrusion extending outwardly therefrom, said mating protrusion being disposed engaging said groove.