Patent ID: 6397579
Filing Date: 2002-06-04
Classification: F02B,F02G

Abstract:
A cyclic internal combustion engine comprising:a compression chamber (1) having a first piston for performing a compression cycle defined by an inlet stroke and a compression stroke, the first piston connected to a first crankshaft; a combustion chamber (2) for performing combustion; an expansion chamber (4) having a second piston for performing an expansion cycle defined by an expansion stroke and an exhaust stroke, the second piston connected to a second crankshaft; a connection for interconnecting the first crankshaft with the second crankshaft; the chambers being separate from one another and connected by at least one duct equipped with a shutter; means for generating an air-fuel mixture and delivering the mixture to the compression chamber (1) during the inlet stroke; wherein an air-fuel mixture is compressed and ignited to produce a combusted air-fuel mixture to be expanded in the expansion chamber (4) when the expansion chamber (4) is generally at its smallest volume in order to produce work; and wherein the beginning of each inlet stroke of a work cycle is advanced in relation to the beginning of each expansion stroke of an immediately previous work cycle, so as to extend combustion of the work cycle during the exhaust stroke of the immediately previous work cycle to reduce the formation of polluting gases during the combustion of the work cycle.