Patent ID: 7841324

Claim:
An internal combustion engine, comprising: at least one combustion chamber and a piston reciprocally moveable in the combustion chamber; the at least one combustion chamber having an intake port and a dual function port; the intake port having an associated intake valve for closing off and opening the intake port in the combustion chamber; the dual function port having an associated dual function valve for closing off and opening the dual function port in the combustion chamber; an intake channel forming part of an intake system and in fluid connection with the combustion chamber via the intake port; an exhaust channel forming part of an exhaust system and in fluid connection with the combustion chamber via the dual function port; a connecting channel having a first end that is in fluid connection with the intake system and having a second end that is in fluid connection with the combustion chamber via the dual function port; and a first connecting valve that includes a first position that closes off the fluid connection between the intake system and the combustion chamber via the dual function port, and that includes a second position that opens the fluid connection between the intake system and the combustion chamber via the dual function port and closes off the fluid connection between the combustion chamber and the exhaust system via the dual function port.