Patent ID: 6354250
Filing Date: 2002-03-12
Classification: F02B,F02D

Abstract:
An internal combustion engine comprising a cylinder block including at least one cylinder bore, a power piston which reciprocates in the cylinder bore and is connected to a rod which in turn is connected to a crankshaft, a control piston reciprocating in the cylinder bore and a combustion chamber defined between both said pistons, the power piston and the control piston moving within the cylinder bore in a way to cause the combustion chamber to define a variable volume, the engine further comprising:hydraulic transmission means connecting said control piston to the crankshaft; a pre-chamber being defined at a rear side of the control piston with the combustion chamber being defined at a leading side of the control piston whereby the combustion chamber and the pre-chamber are separated by the control piston; valve means in the control piston, for connecting the pre-chamber with the combustion chamber in order to sequentially provide scavenging pressurized air and pressurized combustion mixture from the pre-chamber into the combustion chamber, the valve means being connected to the hydraulic transmission means, and wherein the hydraulic transmission means comprises a first hydraulic chamber and a second hydraulic chamber including pressurized fluid, a first hydraulic plunger reciprocating within the first hydraulic chamber and connected to the control piston through a rod sealingly extending out of the first hydraulic chamber and into the cylinder bore, a second hydraulic plunger reciprocating within the second hydraulic chamber and hydraulically interacting with the first plunger, the second plunger being connected to a rod sealingly extending out of the second hydraulic chamber and connected to the crankshaft.