Internal combustion engine with coaxially aligned pistons

A continuous vacuum engine, comprising:

• a crankcase having a crankcase chamber with a fuel intake port through which a fuel mixture is introduced into the crankcase chamber;
• at least one cylinder unit, each of the at least one cylinder comprising:
• a cylinder having a cylinder bore and a cylinder wall;
• an intake channel formed between the crankcase chamber to a cylinder intake port in the cylinder;
• a transfer channel formed between a lower cylinder transfer port at a lower end of the cylinder and an upper cylinder transfer port at an upper end of the cylinder;
• a piston disposed in the cylinder bore having a skirt, a skirt intake port formed in the skirt that aligns with the cylinder intake port when the piston is at a top of a stroke within the cylinder, and a skirt transfer port formed in the skirt that aligns with the lower cylinder transfer port when the cylinder is at a bottom of the stroke;
• a yoke disposed in the crankcase chamber;
• a piston rods connected between a side of the yoke and the piston through the crankcase, where the pistons rod, piston, and yoke move along an axis together, and wherein the action of the piston creates a continuous vacuum in the crankcase chamber;
• and
• a crank having a crank throw disposed in a transverse slot of the yoke.

A method of operating an internal combustion engine, the engine including a crankcase having a crankcase chamber and a fuel intake port through which a fuel is provided into the crankcase chamber, at least one cylinder unit mounted on the crankcase, each of the at least one cylinder unit including a cylinder having a piston disposed therein, and a piston rod connected to the piston that passes from the cylinder into the crankcase chamber to a yoke in the crankcase chamber, the method comprising:

• providing a fuel into the crankcase chamber through the fuel intake port of the crankcase;
• in each cylinder unit:
• pulling fuel from the crankcase chamber into the cylinder through an intake that passes from the crankcase chamber to a cylinder intake port in the cylinder by action of a vacuum created under the piston when the piston travels to a top of a stroke within the cylinder, wherein a skirt intake port in a skirt of the piston aligns with the cylinder intake port when the piston at the top of the stroke;
• wherein, when the piston in each of the at least one cylinder unit is at the top of the stroke, there is compressed fuel mixture above the piston in the cylinder, compressing fuel under the piston by action of the piston traversing a down in the stroke as compelled by the fuel above the piston igniting;
• and
• transferring the compressed fuel under the piston to a top of the cylinder above the piston when the piston is at a bottom of the stroke through a transfer channel, wherein a skirt transfer port of the piston aligns with a lower cylinder transfer port of the transfer channel at the bottom of the stroke;
• wherein a constant vacuum is created in the crankcase chamber by action of the cylinder in the pulling and transferring steps.