Patent ID: 7533648

Claim:
A compression ignition internal combustion engine having at least one combustion chamber for high ignition pressures, wherein each combustion chamber comprises a cylinder bore disposed in a crankcase of the internal combustion engine or a cylinder liner disposed in the cylinder bore, a piston that is guided in the cylinder bore or cylinder liner, and a cylinder head disposed across from said piston, wherein spaces that are adapted to convey coolant are disposed in the crankcase such that coolant can flow about a portion of walls of the cylinder bore or cylinder liner on a side remote from said combustion chamber, wherein said cylinder head is associated with at least one of said combustion chambers and is provided with coolant chambers through which coolant is adapted to flow, wherein gas-reversing valves, at least one injection valve, and guides for at least one inlet valve and at least one outlet valve are disposed in said cylinder head for each combustion chamber, wherein the internal combustion engine further comprises a separate cooled plate that is disposed between said combustion chamber and said cylinder head, forms a surface cover of said combustion chamber and is connected in a positively engaging and gas tight manner with the crankcase and/or the cylinder liner, wherein valve seats for the at least one inlet valve and at least one outlet valve are disposed in said cooled plate, wherein the at least one injection valve is adapted to extend through said cooled plate, wherein said cooled plate, on a side that faces said combustion chamber, is provided with a cylindrical extension having an outer diameter that corresponds essentially to an inner diameter of said combustion chamber, and wherein in an installed state of said cooled plate, said cylindrical extension is disposed within the cylinder bore or cylinder liner such that said cooled plate extends about an upper inner edge of the cylinder bore or cylinder liner in an angular manner.