Abstract: The invention is relative to an ignition unit for internal combustion engines that comprises a primary circuit with a first switch for a primary winding for generating inductions in a secondary winding of a secondary circuit with a starter gap and that comprises a load circuit with the primary winding and comprises a second switch for a load.

Abstract: The invention aims to provide a compact four-stroke engine with rotary valve control and petroil lubrication which has a simplified construction and allows the engine to be used in any position as a result of an improved lubrication system. To this end, the carburetor is directly connected to the inlet opening and the rotary valve is configured in such a way that in a first position it connects the carburetor to the combustion chamber, in a second position it connects the carburetor to the cylinder chamber/crankcase via the overflow conduit and in a third position it connect the cylinder chamber/crankcase to the combustion chamber via the overflow conduit and the combustion chamber to the outlet opening via the conduit. Said rotary valve is in continuous motion during the operation of the combustion engine and the first, second and third positions only occur at corresponding defined moments.

Abstract: In order to create a compact four-cycle internal combustion engine with mixture lubrication comprising a cylinder which is closed on top by a cylinder head and which changes below into a crankcase, in the cylinder a piston moving up and down, in the cylinder head an intake port with an admission valve and an exhaust conduit with an exhaust valve, a carburetor for forming an oil-fuel-air mixture lubricating the engine, as well as means by which a mixture is transported within each engine cycle from the carburetor into the crank chamber closed by the crankcase and from the crank chamber into the intake port, engine which is constructed in a simple way and which is characterized by a good charging behavior, it is proposed that the carburetor is connected outside the crank chamber with the intake port.

Abstract: The invention is relative to an ignition unit for internal combustion engines that comprises a primary circuit with a first switch for a primary winding for generating inductions in a secondary winding of a secondary circuit with a starter gap and that comprises a load circuit with the primary winding and comprises a second switch for a load.