Abstract: This invention relates to a mounting structure of a multiple piston ring for various internal combustion engines. A plurality of piston rings are all wrapped in a cylindrical groove formed upon an outer surface of a piston so that a gap of one piston ring cannot face to a gap of the other piston ring, namely respective gaps of the plurality of piston rings are spaced each other with a certain distance. In order to prevent such a facing of two or more gaps that may occur due to a rotation of the piston rings, a stop pin is mounted on a piston wall so as to engage with a gap of one piston ring or formed as a convex protrusion on one piston ring so as to engage with a gap of the other piston ring. Since respective gaps of the piston rings are not faced to each other, it is possible to prevent any back pressure gas leakage from such gaps of the piston rings.

Abstract: A seal system in a rotary engine includes apex seals held against an inner peripheral wall surface of a rotor housing, seal rings disposed between the apex seals and a side wall surface of the rotor housing, seal rings disposed between sliding plates mounted on a rotor and the side housing member, a split seal ring disposed between the side housing member and the rotor, and an air seal unit for supplying a flow of compressed air across a clearance between the rotor and the rotor housing to prevent gas leakage between compression and combustion stroke chambers.

Abstract: In operation of an internal combustion engine, a lamina of air is introduced into the combustion chamber to line the wall thereof, the fuel being admitted into the interior of the lamina of air. In a two-stroke engine, air entering the combustion chamber is driven by the incoming fuel mixture to form a lamina which lines the wall of the combustion chamber.

Abstract: An improved gasoline or light oil fuel for internal combustion engines has an additive comprising ammonia and methyl alcohol in proportions selected to provide reduction or elimination in the exhaust gases of nitrogen oxides, hydrocarbons, and carbon dioxide.

Abstract: An injection nozzle for injection moulding purposes has a nozzle body with a feed passage opening which is normally closed by a needle valve. The injected resin, under high pressure, forces the needle valve to retract and open the nozzle. The improvement is a piston on the needle valve acted on by spring means to urge the needle valve to closed position, the needle valve having a valve element which, when the needle valve is fully opened, seals off the cylinder in which the piston moves, thereby to prevent entry of injection material into the cylinder. The cylinder may optionally have a charge of gas under high pressure in it, or a material which produces such a charge under the operating conditions of the nozzle.

Abstract: In operation of an internal combustion engine, a lamina of air is introduced into the combustion chamber to line the wall thereof, the fuel being admitted into the interior of the lamina of air. The air lamina may be introduced along a cylinder wall through an annular valve which encompasses an inlet and an exhaust valve, and a secondary air flow may take place through the exhaust valve to a position adjacent the exhaust valve. In an alternative, air is admitted annularly about a fuel inlet valve. In a two-stroke engine, air entering the combustion chamber is driven by the incom fuel mixture to form a lamina which lines the wall of the combustion chamber.