Internal combustion engine with a main combustion chamber and an ignition chamber

Claim 1

An internal combustion engine provided with combustion chambers, comprising a main combustion chamber and an ignition chamber, the latter being connected to the main combustion chamber by at least one spill port, further wherein the ignition chamber constitutes an elongated closed cylinder with a plane front wall and cylindrical wall only a small portion of said cylindrical wall extends into the main combustion chamber between a wall confining the ignition chamber and the adjacent cooled parts of the internal combustion engine surrounding the ignition chamber, at least one hollow space having a capillary structure within inner walls formed in said ignition chamber with capillary spaces filled with a vapourable medium and which are enabling by their capillary forces, condensated parts of said medium to be transported from cooler parts of said hollow space to hotter parts of said hollow space, said cylindrical wall further being penetrated by at least one spill port which extends essentially in a plane perpendicular to an axis of said closed cylinder and tangentially relative to the circumference of said cylindrical wall, this spill port being arranged to branch off toward the main combustion chamber, so as to be adequate for positioning said spill port to optimally provide for introduction of a flame jet exiting through said spill port into the remnant charge in said main combustion chamber, said ignition chamber further being arranged to receive a spark ignition means comprising a first electrode spaced adjacent to and insulated from said ignition chamber, the cylindrical wallthereof forming a second electrode of said ignition means defining a spark gap between said first electrode and said cylindrical wall.