Disclosed is a single-stroke internal combustion engine including a cylinder seat and a power wheel. The cylinder seat has a circular cylinder, at least one first explosion chamber disposed on a cylinder wall, and an ignition system, a fuel supply system, a compression means, an exhaust means and an intake means installed at the external periphery of the cylinder seat corresponsive to each respective first explosion chamber and communicating with the cylinder. Each ignition system is corresponsive to the first explosion chamber; the power wheel is slidably coupled to the circular cylinder of the cylinder seat, and has at least one compression chamber and a second explosion chamber disposed adjacent to each other and rotably corresponsive to the first explosion chamber, fuel supply system, compression means, exhaust means and intake means of the cylinder seat. After the power wheel is turned on, air enters into the intake means and fuel gas is supplied from the fuel supply means, and both air and fuel gas are compressed in the compression chamber by the compression means and collected into the first explosion chamber and the second explosion chamber and ignited by the ignition system for explosion, and the explosion produced by the compressed fuel gas has a high explosive yield to drive the power wheel to rotate by the second explosion chamber, so that the power wheel is rotated constantly in a single direction to provide high-efficiency kinetic energy.

A two-stroke internal combustion engine has at least one cylinder (1) receiving a piston (2) and having at least one injection nozzle (4) in the form of a multi-hole low-pressure nozzle inserted in a bore (5) in the cylinder jacket (6). The multi-hole low-pressure nozzle has a nozzle plate (15) with nozzle openings (16) arranged within an enveloping circle (17) to form a common nozzle jet (11) with an opening angle (α) dependent on the inclination of the nozzle axis (12) relative to the orifice surface of the bore and preventing the nozzle jet from being applied to the cylinder jacket. A resulting vector (14) from the velocity vector (13) of the nozzle jet in the direction of the nozzle axis (12) and the velocity vector (10) of the flushing air flow in the flow main direction defines with the cylinder jacket a maximum inclination angle (γ) of 20°.

A two-stroke internal combustion engine has at least one cylinder (1) receiving a piston (2) and having at least one injection nozzle (4) in the form of a multi-hole low-pressure nozzle inserted in a bore (5) in the cylinder jacket (6). The multi-hole low-pressure nozzle has a nozzle plate (15) with nozzle openings (16) arranged within an enveloping circle (17) to form a common nozzle jet (11) with an opening angle () dependent on the inclination of the nozzle axis (12) relative to the orifice surface of the bore and preventing the nozzle jet from being applied to the cylinder jacket. A resulting vector (14) from the velocity vector (13) of the nozzle jet in the direction of the nozzle axis (12) and the velocity vector (10) of the flushing air flow in the flow main direction defines with the cylinder jacket a maximum inclination angle () of 20.

A rotary internal combustion engine includes a cylinder seat and a power wheel. The cylinder seat has a circular cylinder, at least one first explosion chamber disposed on a cylinder wall, and an ignition system, a fuel supply system, a compression assembly, an exhaust and an intake installed thereon for each respective first explosion chamber. The power wheel is slidably coupled to the circular cylinder, and has at least one compression chamber and a second explosion chamber disposed adjacent thereto and when rotated provides connection to the first explosion chamber. As a result of rotation of the power wheel, air and fuel gas are compressed in the compression chamber, collected into the first and second explosion chambers, and then ignited by the ignition system to produce a high explosive yield, so that the power wheel is rotated constantly in a single direction to provide high-efficiency kinetic energy.