Patent ID: 6439211
Filing Date: 2002-08-27
Classification: F02B,F02D,F02M,Y02T

Abstract:
A four stroke internal combustion engine with compression ignition comprising a cylinder with a piston disposed in said cylinder so as to be movable between top dead center and bottom dead center end positions, inlet and exhaust passages with inlet and exhaust valves for controlling combustion air flow to, and exhaust gas flow from, said cylinder, said exhaust valve being selectively operable so as to open, during an exhaust stroke, before the top dead center position of said piston and close only after the top dead center position of the piston and said inlet valve being operable so as to open about at the same time as said exhaust valve closes during the intake stroke, for sucking exhaust gas discharged into said exhaust duct during the exhaust stroke from the exhaust duct back into the cylinder at the beginning of the intake stroke and to fill the cylinder with fresh intake air during the remainder of the intake stroke when the exhaust valve is closed and the intake valve is open.