Patent ID: 6129069
Filing Date: 2000-10-10
Classification: F02B,Y02T

Abstract:
In an internal combustion engine having a crankcase in which there is a rotatably supported crankshaft, to which there is articulated at least one connecting rod, which bears a piston that is movable in a cylinder covered by a cylinder head so as to form a working space, said cylinder head including ducts from supplying an air/gas mixture to the working space, the combination comprising:a prechamber (11) recessed into said cylinder head and in free flow communication with said working space (7),an ignition chamber (21) extending downwardly from said cylinder head and into said prechamber (11) whereby the major portion of the exterior of said ignition chamber is exposed to the combustion gases in said prechamber,a flow control device including a valve (12) in said ignition chamber (21) having an open position in which said ignition chamber is in free flow communication with said working space (7) and a closed position in which said ignition chamber (21) is closed,a control mechanism for cyclically opening and closing said valve (12), said control mechanism opening said valve (12) near the top dead center position of said piston at the end of the compression stroke of said piston and subsequently closing said valve (12) during combustion of said compressed air/gas mixture prior to completion of the power stroke of said piston, andan ignition device (22) in said ignition chamber (21) operable to ignite said compressed air/gas mixture upon opening of said valve (12).