Patent ID: 6694942
Filing Date: 2004-02-24
Classification: F01L,F02B

Abstract:
A four-cycle internal combustion engine comprising a piston which moves up and down in a cylinder, a crankshaft which is rotatably positioned in a crankcase connected with the cylinder or made of one piece and which is set rotating by the up and down movement of the piston, a cylinder head which terminates the cylinder on the top and which forms a combustion chamber, a rotary valve, controlled by the crankshaft, which connects the combustion chamber optionally with an inlet opening or with an outlet opening, a carburetor for constituting a lubrication fuel-oil-air mixture as well as an overflow duct through which the cylinder/crankcase chamber can be connected with the combustion chamber over the rotary valve, characterized in that the carburetor is directly connected with the inlet opening and that the rotary valve is configured in such a way that in a first position, it connects the carburetor with the combustion chamber, that in a second position, it connects the carburetor over the overflow duct with the cylinder/crankcase chamber and that in a third position, it connects the cylinder/crankcase chamber over the overflow duct with the combustion chamber and the combustion chamber over the channel with the outlet opening, whereby the rotary valve is continuously moving during the operation of the internal combustion engine and that the first, second and third position exist only at a respectively precise moment.